Classification of printing methods based on the relative position of the graphic and non-graphic areas on the plate
(1) Letterpress printing, the graphic part of the printing plate is convex, which is obviously higher than the blank part. The printing principle is similar to the seal. The early woodblock printing, movable type printing and later typeface printing are all letterpress printing.
(2) Gravure printing, the graphic part of the printing plate is lower than the blank part, and is often used for printing of securities such as banknotes and stamps.
(3) In lithographic printing, the graphic part and the blank part of the printing plate are almost in the same plane, and the printing is performed by the principle that the oil and water are incompatible.
(4) stencil printing, 【 Film Lamination Machine 】the graphic part of the printing plate is a hole, the ink is transferred to the surface of the substrate through the hole, and the common stencil printing has a hollow version and a screen version.
Sorting printing methods according to the paper feeding method of the printing press
Flat paper printing: also known as sheetfed printing. It is printed on flat paper.
Web printing: also known as rotary printing. It is a method of printing on a web.
Sort printing methods based on whether the plate is in contact with the substrate
Direct printing:【 Lamination Machine Manufacturer 】The ink on the plate is printed directly in contact with the substrate. Such as letterpress printing, gravure printing, screen printing.
Indirect printing: A printing method in which the printing plate ink is transferred onto a substrate by a blanket.
2019年11月1日星期五
2019年10月16日星期三
Mechanical function of laminating machine
The laminating machine can be divided into two types: instant coating laminating machine and pre-coating laminating machine. It is a special equipment for paper and film. The coating laminating machine includes gluing, drying and hot pressing. The three parts, which have wide application range and stable and reliable processing performance, are widely used in China. Pre-coated laminating machine, without glue and dry parts, small size, low cost, flexible operation, not only suitable for laminating processing of large-volume printed materials, but also suitable for coating of small batches and scattered printed materials such as automated desktop 【 Film Lamination Machine 】 office systems. Processing is very promising.
Mechanical function of laminating machine
1. It has a non-stop paper-feeding device to ensure continuous production;
2. the use of large diameter press roller, effectively improve the production speed, to ensure that the composite products are flat and bright;
3. The powder removing mechanism combined with sweeping powder and powder compaction is used to ensure the powder removing effect. (configure the powder removing device);
4. The advanced drying drying tunnel structure ensures that the glue on the film can be dried quickly;
5. The adjustable rotary disc cutter can ensure the slitting of the paper;
6. The motor adopts frequency conversion control, which is safe and reliable.
Laminating machine use principle
1. Use the film as the cover to protect the paper. After the film is coated, the service life of the cover (or the surface of the printed product) can be extended, especially for the students' textbooks, so the usage is getting larger and larger;
2. The print marks are not easily damaged. After coating with a film, it can add color effect and protection to the color printed graphic without wearing it, which is beneficial to the publishers on the surface of the cover or printed product according to their needs. Various art designs have also contributed to the increase in usage;
3, that is, the production of coating film is large, the cost of film coating in the film is low, easy to get on, and profitable, the enterprise can benefit.
Laminator troubleshooting
First, the machine does not start: the input wire is not connected, the power cable is reversed, and the voltage is not enough;Second, the temperature measurement 【Hand Lamination Machine 】is not accurate: thermocouple, temperature controller. Whether the installation is incorrect and damaged;Third, the working vacuum does not come: the gas path is not connected, the hand valve or the solenoid valve is not closed, the vacuum pump motor belt is loose, and the vacuum gauge is damaged;Fourth, the main power switch trip: heating box top input wire leakage, distribution box leakage, external wires on the equipment, motor leakage, etc.;The film is not in place: the vacuum is not enough, the gas is leaking, the temperature is not enough, the film is too thin, the workpiece is pasted by other materials, the concave depth of the workpiece exceeds the film pull-up, the suction time is too short, the film is not pulled up, the workpiece distance too close.
Sixth, the surface of the workpiece is folded and not smooth or the corners are not covered: the film is not straightened, the film quality is not good, the workpiece is not well polished, the glue is sprayed too much, and the mold under the workpiece is too low.【 Film Lamination Machine 】When the suction is not applied, the film pulls down: whether the solenoid valve or the hand valve is open;Seven, play the phenomenon: the temperature is too high, the heating time is too long, the film quality is not good, no heating;Eight, the situation of sticking to the board is not good.
Classification of laminating machine
First, instant coating
The operation of this type of equipment includes three parts: sizing, drying and hot pressing. The operation is higher. The advantage is that the quality of the finished product is reliable. It has a fatal disadvantage that the oily rubber will produce gas that affects human health, so this technology is Developed countries such as Europe and the United States have been completely banned, water-based glue is more environmentally friendly than oil, and the cost of oil is relatively high.
1. Scope of application:
It is suitable for color film, packaging paper, soft sheet, soft rubber sheet and other laminating film (over film), making it bright, colorful and waterproof;
2. Detailed description:
1. The base and the wall are made of cast iron, which will never be deformed, 【 Fully Automatic Lamination Machine 】ensuring that the accuracy will not be affected during the use process and repair and replacement of parts;
2. The rubber roller and the rubber-limited roller are made by precision, and the concentricity error of the roller surface is controlled within 0.01mm to ensure uniform coating and save glue dosage;
3. hot composite steel roller precision mirror treatment, the film finished product is excellent;
4. electronic automatic thermostat;
5. hydraulic system unique design, precise and stable;
6. Adding a roll paper feeding device, which can be applied to the composite of roll materials;
7. Water-based and oil-based dual-purpose machines can be customized according to user requirements.
Second, pre-coated
The machine film is formed once, the glue used has been coated with glue, the glue is melted by heating when the film is coated, and the film is bonded to the printed matter by pressure. The filming device is cheap, easy to operate, and is operated.【 Film Lamination Machine 】The generation of no harmful gases is a trend in the development of film. In today's society where environmental protection is increasingly concerned, it is believed that this technology will one day replace the pre-coated film and become the main film-coating technology in the domestic printing industry. The technology is not very mature in China, and there are still some problems to be solved, such as: single-sided film curling (has a single-sided anti-curl machine, but the price is higher), and the printing with silicone oil is difficult to cover. Widely used in short-run printing, digital fast printing industry.
2019年10月11日星期五
Will UV varnishing replace the pre-coated film lamination process ?
The printing technology continues to advance, the printing materials are constantly updated, the influence of various post-press processing conditions on the film is increasing, the printing quality standards and market demand are constantly increasing, which requires the film industry to change according to objective conditions. New quality technical standards for structural adjustment. At the same time, we should also look for other processes that can replace the film in time to reduce the pressure on the environment. In fact, in addition to the film coating process, UV glazing can also play a certain role in protecting and decorating the surface of the printed matter. The two are similar in many functions. Due to the relatively low cost of UV glazing, 【Laminating Machine Supplier】the development is relatively rapid, and the product is very attractive, so it also has a certain market share in some post-press processing fields. Some people who are optimistic about UV glazing technology even believe that this technology can be independently developed instead of laminating technology.
In fact, this is just a wish of people. According to some printing companies that use UV glazing technology, UV glazing applications are mostly partial glazing. Local UV glazing can improve the grade of books, but in most cases, this partial UV glazing process is also This is done after the film is applied, and the previous film coating process must be a solvent-based film. In addition, there is still a lot of deficiencies in UV glazing compared to film coating. Such as UV glazing protection, folding resistance, wear resistance, etc. are not as good as the film, there are limitations in many areas, 【Lamination Machine Manufacturer】 such as packaging boxes; UV glazing also needs to put into printing equipment and UV curing equipment, and the film has Off-the-shelf equipment foundation and mature technology; in addition, some UV varnish will also volatilize odor during the coating process, which will affect the operator.
Today's printing houses and publishing houses pay great attention to this process, and believe that UV glazing can replace the laminating process in book printing. But in general, UV glazing is still limited in many aspects, there are still many problems in the process, and it is impossible to completely replace the laminating process.
2019年9月22日星期日
Film Lamination Process
The coating process can be divided into cold (cold pressure) coating, hot (heating) coating and liquid coating according to the heat, pressure and material. Thermal coating technology refers to heating and pre-coating the adhesive on the diaphragm, through which the film is bonded to the printed product; while the cold coating is pressed, directly bonding the film to the printed product by the adhesive. Together. Both methods can produce various special films such as UV protective film, waterproof or anti-friction film. 【Film Lamination Machine 】Recently, there has also been a new technology called "liquid film". Simply use a brush, spray gun, roller or special laminator to apply a film directly on the surface of the product. Although the technical operation is simple and the price is low, it is still not mature.Small laminating machine laminating process.
This type of small laminator was developed to meet the needs of low-to-medium consumers. This kind of small laminating machine solves the fundamental problem of the ordinary laminating machine. The price of the laminating machine is between 1400 and 1500 yuan. Since the film is pressed by the inner hot rubber roller, the film is heated up and down, which increases the heating time of the pre-coating film, and It is heated and balanced, so the film that is covered is smooth and bright, 【 Fully Automatic Lamination Machine 】 and it has the same effect as the film coated by the high-grade laminating machine. Only such a small laminating machine has a heating power of only 500 W. Although the temperature is adjustable, the speed is fixed, and the film can be pressed 0.7-0.8 m per minute. Suitable for business card lamination, recipe film, photo film and graphic print film, especially for small printing houses, typing and copying shops, business card production companies and photo studios. In order to reduce equipment investment and reduce costs, this type of film is used. There are more machines.【 Good Laminating Machine 】At present, the market prospects of such small laminating machines are very good. Many customers who used to use them have later started sales of such laminating machines, and the sales volume is also good. It can be said that this small laminating machine is the most cost-effective. It is easy to use and has obvious effects. It solves the needs of some small end customers and has a great promotion value.
This type of small laminator was developed to meet the needs of low-to-medium consumers. This kind of small laminating machine solves the fundamental problem of the ordinary laminating machine. The price of the laminating machine is between 1400 and 1500 yuan. Since the film is pressed by the inner hot rubber roller, the film is heated up and down, which increases the heating time of the pre-coating film, and It is heated and balanced, so the film that is covered is smooth and bright, 【 Fully Automatic Lamination Machine 】 and it has the same effect as the film coated by the high-grade laminating machine. Only such a small laminating machine has a heating power of only 500 W. Although the temperature is adjustable, the speed is fixed, and the film can be pressed 0.7-0.8 m per minute. Suitable for business card lamination, recipe film, photo film and graphic print film, especially for small printing houses, typing and copying shops, business card production companies and photo studios. In order to reduce equipment investment and reduce costs, this type of film is used. There are more machines.【 Good Laminating Machine 】At present, the market prospects of such small laminating machines are very good. Many customers who used to use them have later started sales of such laminating machines, and the sales volume is also good. It can be said that this small laminating machine is the most cost-effective. It is easy to use and has obvious effects. It solves the needs of some small end customers and has a great promotion value.
2019年9月21日星期六
Pre-coated Film Lamination Process
The pre-coating film refers to a process in which a plastic film is sized and re-rolled before being combined with a paper printed product. It is firstly applied to the film by the pre-coated film processing factory according to the size of the specification. The glue is applied to the film for re-rolling, and then combined with the printed matter.The pre-coated film was first used in 1989 and has been widely used in Europe and the United States. It entered Asia around 1996. At the same time as entering Asia, Europe and the United States have announced that it is forbidden to use the film as a pre-coating film.【 Fully Automatic Lamination Machine 】Due to the late use, all the countries in Asia except Japan have used pre-coated films, and other countries (such as China, South Korea, etc.) are in the state of pre-coating and film coating. China has only used pre-coated films since 2000, and the market share of pre-coated films in China is still small.
Pre-coated films have many advantages over instant coatings. If the pollution is reduced, there is no damage to the human body; the quality of the film will not be affected by the different properties of the paper or the color of the ink; the pre-coating film laminating machine is simpler to operate, and the processed image is better; the wrinkles are basically eliminated. , bubbles, shedding and other phenomena. Most notably, this is an environmentally friendly process, and the entire production process is harmless to the human body. 【 Laminating Machine Supplier 】 However, the promotion of pre-coated film in China is still relatively slow. Among them, the cost issue is a big influential factor, which determines the enthusiasm of investors for the pre-coating process. In a recent survey, more than half of the respondents believe that pre-coated products are expensive in terms of price, because pre-coated products are printing consumables, and the cost of printing is a non-negligible problem for printers when selecting consumables.
In addition, due to the lack of paper and film separation technology in China, pre-coated films cannot be completely called an environmentally friendly process in China. In response to this situation, pre-coated products should reduce costs through mass production, so that market prices are getting closer to the needs of printers. At the same time, the research and development or introduction of the paper membrane separation technology should also attract the attention of relevant departments, in order to achieve environmentally friendly coating and rational development of the laminating process without being able to discard the laminating process. 【 Film Lamination Machine 】It is a brand-new transfer technology that can cope with complex work pieces and is suitable for different materials. It also greatly increases the added value of products due to vivid patterns and vivid colors. This technology is a special chemical treatment film, after printing a certain color pattern, it is sent to the surface of the water, using water pressure to write the pattern evenly on the surface of the product, while the coated film is automatically dissolved, washed and baked. After drying, a layer of transparent protective coating is applied, and the product has a completely different visual effect.
Pre-coated films have many advantages over instant coatings. If the pollution is reduced, there is no damage to the human body; the quality of the film will not be affected by the different properties of the paper or the color of the ink; the pre-coating film laminating machine is simpler to operate, and the processed image is better; the wrinkles are basically eliminated. , bubbles, shedding and other phenomena. Most notably, this is an environmentally friendly process, and the entire production process is harmless to the human body. 【 Laminating Machine Supplier 】 However, the promotion of pre-coated film in China is still relatively slow. Among them, the cost issue is a big influential factor, which determines the enthusiasm of investors for the pre-coating process. In a recent survey, more than half of the respondents believe that pre-coated products are expensive in terms of price, because pre-coated products are printing consumables, and the cost of printing is a non-negligible problem for printers when selecting consumables.
In addition, due to the lack of paper and film separation technology in China, pre-coated films cannot be completely called an environmentally friendly process in China. In response to this situation, pre-coated products should reduce costs through mass production, so that market prices are getting closer to the needs of printers. At the same time, the research and development or introduction of the paper membrane separation technology should also attract the attention of relevant departments, in order to achieve environmentally friendly coating and rational development of the laminating process without being able to discard the laminating process. 【 Film Lamination Machine 】It is a brand-new transfer technology that can cope with complex work pieces and is suitable for different materials. It also greatly increases the added value of products due to vivid patterns and vivid colors. This technology is a special chemical treatment film, after printing a certain color pattern, it is sent to the surface of the water, using water pressure to write the pattern evenly on the surface of the product, while the coated film is automatically dissolved, washed and baked. After drying, a layer of transparent protective coating is applied, and the product has a completely different visual effect.
2019年9月6日星期五
Water Based Film Lamination Machine
The operation of this type of equipment includes three parts: sizing, drying and hot pressing. The operation is higher. The advantage is that the quality of the finished product is reliable. [ Automatic Lamination Machine ] It has a fatal disadvantage that the oily rubber will produce gas that affects human health, so this technology in developed countries such as Europe and the United States have been completely banned, water-based glue is more environmentally friendly than oil, and the cost of oil is relatively high.
Scope of application:
It is suitable for color film, packaging paper, soft sheet, soft rubber sheet and other laminated film, making it bright, colorful and waterproof.
Detailed Description:
1. The base and the wall are made of cast iron, which will never be deformed, ensuring that the accuracy will not be affected during the use and maintenance of replacement parts.
2. The rubber roller and the rubber roller are made by precision. [ Lamination Machine Manufacturer ] The concentricity error of the roller surface is controlled within 0.01mm to ensure uniform coating and save glue dosage.
3. The hot composite steel roller precision mirror treatment, the precision of the laminated film is excellent.
4. Electronic automatic thermostat.
5. The hydraulic system is uniquely designed and stable.
6. Added to the roll paper feeding device, can be applied to the composite of the roll material. Water-based and oil-based dual-purpose machines can be customized according to user requirements.
Water Based Lamination Machine
Mechanical function:
1. It has a non-stop paper feeder to ensure continuous production.
2. The large diameter pressing roller is used to effectively increase the production speed and ensure the smoothness of the composite product.
3. The powder removing mechanism combined with sweeping powder and powder compaction is used to ensure the powder removing effect.
4. Advanced drying tunnel structure ensures that the glue on the film can be dried quickly.
5. Adjustable disc rotary cutter ensures paper cutting.
6. The motor is controlled by frequency conversion, which is safe and reliable.
Scope of application:
It is suitable for color film, packaging paper, soft sheet, soft rubber sheet and other laminated film, making it bright, colorful and waterproof.
Detailed Description:
1. The base and the wall are made of cast iron, which will never be deformed, ensuring that the accuracy will not be affected during the use and maintenance of replacement parts.
2. The rubber roller and the rubber roller are made by precision. [ Lamination Machine Manufacturer ] The concentricity error of the roller surface is controlled within 0.01mm to ensure uniform coating and save glue dosage.
3. The hot composite steel roller precision mirror treatment, the precision of the laminated film is excellent.
4. Electronic automatic thermostat.
5. The hydraulic system is uniquely designed and stable.
6. Added to the roll paper feeding device, can be applied to the composite of the roll material. Water-based and oil-based dual-purpose machines can be customized according to user requirements.
Water Based Lamination Machine
Mechanical function:
1. It has a non-stop paper feeder to ensure continuous production.
2. The large diameter pressing roller is used to effectively increase the production speed and ensure the smoothness of the composite product.
3. The powder removing mechanism combined with sweeping powder and powder compaction is used to ensure the powder removing effect.
4. Advanced drying tunnel structure ensures that the glue on the film can be dried quickly.
5. Adjustable disc rotary cutter ensures paper cutting.
6. The motor is controlled by frequency conversion, which is safe and reliable.
Two Types of Film Laminating Machines
The laminating machine can be divided into two types: instant coating laminating machine and pre-coating laminating machine. It is a special equipment for paper, board and enamel film. It is pressed together by rubber roller and heating roller to form a product of paper-plastic integration. That is, the coating laminating machine includes sizing, drying and heat.[ Film Lamination Machine ] Three parts of pressure, its wide application range, stable and reliable processing performance, is widely used in China. Pre-coated laminating machine, without glue and dry parts, small size, low cost, flexible operation, not only suitable for laminating processing of large-volume printed materials, but also suitable for coating of small batches and scattered printed materials such as automated desktop office systems. Very promising.
The laminating process is a surface processing process after printing, and is also known as post-printing. Post-press silicone or post-printing film refers to a film processing machine that covers a surface of a printed product with a transparent plastic film of 0.012 to 0.020 mm thick to form a paper-plastic product processing technology. The laminating machine is used to complete the laminating process. Generally speaking, according to the process used, it can be divided into two types: the coating film and the pre-coating film. [ Water based Lamination Machine ] According to the film material, it is divided into two types: a bright film and a matte film. The main problems affecting the laminating process: affecting the health of the operators, there are fire hazards; the paper and film materials after lamination are difficult to recycle, wasting resources.
The laminating process is a surface processing process after printing, and is also known as post-printing. Post-press silicone or post-printing film refers to a film processing machine that covers a surface of a printed product with a transparent plastic film of 0.012 to 0.020 mm thick to form a paper-plastic product processing technology. The laminating machine is used to complete the laminating process. Generally speaking, according to the process used, it can be divided into two types: the coating film and the pre-coating film. [ Water based Lamination Machine ] According to the film material, it is divided into two types: a bright film and a matte film. The main problems affecting the laminating process: affecting the health of the operators, there are fire hazards; the paper and film materials after lamination are difficult to recycle, wasting resources.
2019年8月31日星期六
Film inspection before running the semi-automatic laminating machine
After the semi-automatic laminating machine is adjusted, the pre-processed printed matter is fed into a paper feeding mechanism for lamination, and samples are taken for inspection. Before the film is covered, a small amount of printed matter is used for inspection to avoid a large amount of waste. [ Semi automatic lamination machine ] After the test is passed, large-scale production can be carried out.
The film inspection method is as follows:
1.
The semi-automatic laminating machine peels off the corner of the sample film which is completed by the film in the width direction, presses the paper, tears all the width direction, and after all tearing and tearing, if the surface of the printed matter is imprinted with the rubber layer The transfer of the fibers of the paper to the film indicates that the printed matter adheres well to the film and is a qualified product.
2.
Semi-automatic laminating machine put the coated sample into the drying tunnel, baking at 60 ~ 65 degrees Celsius for about 30 minutes, if there is no foaming, no delamination, no wrinkles, is a qualified product. [ Manual Lamination Machine ] The film peeled off after baking should not be separated from the paper.
3.
The semi-automatic laminating machine takes the sample into cold water for 1 hour and then takes it out. If the plastic film and the printed matter are not separated, it is a good product.
4.
The semi-automatic laminating machine puts the sample on the creasing machine and presses it. If the concave and convex parts are not delaminated, it is a good product.
The film inspection method is as follows:
1.
The semi-automatic laminating machine peels off the corner of the sample film which is completed by the film in the width direction, presses the paper, tears all the width direction, and after all tearing and tearing, if the surface of the printed matter is imprinted with the rubber layer The transfer of the fibers of the paper to the film indicates that the printed matter adheres well to the film and is a qualified product.
2.
Semi-automatic laminating machine put the coated sample into the drying tunnel, baking at 60 ~ 65 degrees Celsius for about 30 minutes, if there is no foaming, no delamination, no wrinkles, is a qualified product. [ Manual Lamination Machine ] The film peeled off after baking should not be separated from the paper.
3.
The semi-automatic laminating machine takes the sample into cold water for 1 hour and then takes it out. If the plastic film and the printed matter are not separated, it is a good product.
4.
The semi-automatic laminating machine puts the sample on the creasing machine and presses it. If the concave and convex parts are not delaminated, it is a good product.
2019年8月26日星期一
Development trend of film lamination
The paper after the film lamination process is unrecoverable and becomes a white pollution, and toxic substances such as toluene and water are volatilized during the film coating process, which impairs people's health. Today, advocating "protecting the environment and protecting resources", the plastic film coating process has been eliminated in Europe and the United States, and European and American countries have even refused to import various packaging materials with plastic film. [ Thermal Lamination Machine ] Although there are water-based plastic film coating processes and hot-melt pre-coating film dry plastic compounding processes, the former still fails to solve the problem that the film printing waste cannot be degraded and cannot be recycled. The latter requires a large amount of heat in the production process and is discarded. The material needs to be separated in paper and plastic at 60 ° C, and the cost is high.
With the improvement of environmental awareness, new scientific and technological achievements will eliminate the old process products, so that the film process will undergo qualitative changes. "Non-toxic, harmless, green and environmentally friendly" naturally becomes an inevitable development trend of the film coating process. In addition, the glazing process is therefore optimistic. Glazing is a method of coating, spraying or printing to add a colorless transparent coating on the surface of the printed matter, that is, UV varnish. After calendering and drying, the gloss of the surface of the printed product is increased, and the stiffness is also improved. [ Thermal Laminator ] At the same time, the printed waste after glazing can be recycled or decomposed by itself, and does not pollute the environment. Therefore, glazing is a processing technology with great development potential, and it is possible to gradually occupy the plastic coating process market. Although the dilute machines used in oil glazing and alcohol glazing on the market are toluene and alcohol, respectively, which are harmful to the human body and unfavorable to environmental protection, water glazing has gradually become the mainstream of glazing process.[ Lamination Machine Manufacturer ] The water-based UV glazing process that has been developed so far is an ideal environmentally friendly glazing process and the development direction of glazing process in the future.
With the improvement of environmental awareness, new scientific and technological achievements will eliminate the old process products, so that the film process will undergo qualitative changes. "Non-toxic, harmless, green and environmentally friendly" naturally becomes an inevitable development trend of the film coating process. In addition, the glazing process is therefore optimistic. Glazing is a method of coating, spraying or printing to add a colorless transparent coating on the surface of the printed matter, that is, UV varnish. After calendering and drying, the gloss of the surface of the printed product is increased, and the stiffness is also improved. [ Thermal Laminator ] At the same time, the printed waste after glazing can be recycled or decomposed by itself, and does not pollute the environment. Therefore, glazing is a processing technology with great development potential, and it is possible to gradually occupy the plastic coating process market. Although the dilute machines used in oil glazing and alcohol glazing on the market are toluene and alcohol, respectively, which are harmful to the human body and unfavorable to environmental protection, water glazing has gradually become the mainstream of glazing process.[ Lamination Machine Manufacturer ] The water-based UV glazing process that has been developed so far is an ideal environmentally friendly glazing process and the development direction of glazing process in the future.
2019年8月23日星期五
Factors affecting the quality of the film lamination
01
Print ink layer condition
Refers to paper properties, ink properties, ink layer thickness, graphic area and printed graphic density. [ Film Lamination Machine ] When the printed ink layer is thick and the image area is large, many paper fiber capillary pores are blocked, which hinders the penetration and diffusion of the adhesive, making the printed matter and the plastic film difficult to adhere, and delamination, foaming and the like are prone to occur.
02
environment humidity
Between the adhesive and the plastic film and the printed matter, as the relative humidity of the air changes changed the water content. Humidity-sensitive prints can cause internal stresses due to dimensional changes. For example, the longitudinal expansion ratio of the printed matter is 0.5%, and the longitudinal heat shrinkage of the BOPP film is 4%. If the water absorption of the printed matter is too large and the elongation occurs, and the internal stress is caused between the heat shrinkage of the film, the film product may be curled, wrinkled, and bonded. [ Fully Automatic Lamination Machine ] Not strong. In addition, in a high humidity environment, the equilibrium moisture value of the printed matter will also change, and a large amount of moisture absorbed from the air medium will be released from the surface during the hot pressing compounding process, stagnating at the bonding interface, and partially forming a non-adhesive bond. phenomenon. Moreover, the change in the equilibrium moisture value of the printed matter (moisture from the air medium or dehumidification into the air medium) occurs mostly at the edge of the printed matter, so that it forms a ruffled edge or a tight edge, and is not easily formed well with the film in the hot press composite. [ Automatic Lamination Machine ] The wrinkles are caused by the bonding, so that the production cannot be carried out smoothly.
03
temperature control
Heating can soften the film and bond the paper to the plastic film. However, the temperature is too high, the film is easy to break, which seriously affects the quality of the product. Therefore, measures such as fan cooling and turning off the heating wire should be adopted.
Print ink layer condition
Refers to paper properties, ink properties, ink layer thickness, graphic area and printed graphic density. [ Film Lamination Machine ] When the printed ink layer is thick and the image area is large, many paper fiber capillary pores are blocked, which hinders the penetration and diffusion of the adhesive, making the printed matter and the plastic film difficult to adhere, and delamination, foaming and the like are prone to occur.
02
environment humidity
Between the adhesive and the plastic film and the printed matter, as the relative humidity of the air changes changed the water content. Humidity-sensitive prints can cause internal stresses due to dimensional changes. For example, the longitudinal expansion ratio of the printed matter is 0.5%, and the longitudinal heat shrinkage of the BOPP film is 4%. If the water absorption of the printed matter is too large and the elongation occurs, and the internal stress is caused between the heat shrinkage of the film, the film product may be curled, wrinkled, and bonded. [ Fully Automatic Lamination Machine ] Not strong. In addition, in a high humidity environment, the equilibrium moisture value of the printed matter will also change, and a large amount of moisture absorbed from the air medium will be released from the surface during the hot pressing compounding process, stagnating at the bonding interface, and partially forming a non-adhesive bond. phenomenon. Moreover, the change in the equilibrium moisture value of the printed matter (moisture from the air medium or dehumidification into the air medium) occurs mostly at the edge of the printed matter, so that it forms a ruffled edge or a tight edge, and is not easily formed well with the film in the hot press composite. [ Automatic Lamination Machine ] The wrinkles are caused by the bonding, so that the production cannot be carried out smoothly.
03
temperature control
Heating can soften the film and bond the paper to the plastic film. However, the temperature is too high, the film is easy to break, which seriously affects the quality of the product. Therefore, measures such as fan cooling and turning off the heating wire should be adopted.
2019年8月21日星期三
How large is the lamination strength ?
Refers to the bond fastness between the plastic film and the paper (board) print in the film product. The size depends on the adhesion between the plastic film, the paper (board) print and the adhesive (or hot melt adhesive). [ film lamination machine ] When laminating, the adhesion is mainly derived from the mechanical bonding force and physico-chemical bonding between the plastic film, the paper (plate) printing article and the adhesive (or hot melt adhesive).
Fully Automatic Thermal Film Laminating Machine
The key to film fastness is the affinity of the glue to the print (ink and substrate). As a film coating industry, printing inks are not selectable, that is, only the film that is suitable for the ink market is the only choice, so as a pre-coating film, it can only be regarded as high quality by adapting to the performance of all inks.[ lamination machine manufacturer ]. The composite strength of the coated product is affected by the process parameters in the film production process, such as the temperature, pressure, speed of the coating process, the coating condition of the adhesive, the film tension and environmental factors. At the same time, it is affected by the printing process, such as the surface state of the printed product formed after printing, such as the thickness of the ink layer, the area and distribution of the image, the characteristics of the ink, the use of the thinner, the use of dusting, and the drying of the ink layer.
The key to film fastness is the affinity of the glue to the print (ink and substrate). As a film coating industry, printing inks are not selectable, that is, only the film that is suitable for the ink market is the only choice, so as a pre-coating film, it can only be regarded as high quality by adapting to the performance of all inks.[ lamination machine manufacturer ]. The composite strength of the coated product is affected by the process parameters in the film production process, such as the temperature, pressure, speed of the coating process, the coating condition of the adhesive, the film tension and environmental factors. At the same time, it is affected by the printing process, such as the surface state of the printed product formed after printing, such as the thickness of the ink layer, the area and distribution of the image, the characteristics of the ink, the use of the thinner, the use of dusting, and the drying of the ink layer.
2019年8月15日星期四
Classification of Film Lamination
Coating film
That is, when the coating film process is performed, the adhesive is applied to the film, and then hot pressed.
This is also the current popular processing method.
Pre-coated film
This process greatly simplifies lamination because the laminating equipment does not require a binder to heat the drying system.
The program is very convenient to operate, can be used with the start-up, has great production flexibility, no solvent smell, no environmental pollution, more importantly, it can completely avoid bubbles, delamination and other faults, and its finished product has high transparency and wide application prospects and promotional value. [ water based lamination machine ]
The pre-coated film structure is composed of a substrate and a glue layer. The substrate is usually a PET film and a BOPP film. From the viewpoint of material cost and processing technology, most of the pre-coated film substrates are made of BOPP film and have a thickness of 12-20 micrometers. The thickness is 5-15 microns. According to different processing equipment and process conditions, different thicknesses of glue layer are selected, and the glue layer is divided into hot melt adhesive and organic polymer low temperature resin plate. [ film lamination machine ] The difference between the two is that the hot melt adhesive is made by blending and modifying several materials of the main adhesive resin, the tackifier and the modifier, and the organic polymer resin is a single polymer low temperature copolymer.
Due to limitations in technology, production equipment, and raw materials, pre-coated films (mostly hot melt adhesives) produced by domestic equipment still have quality defects. Since the production process is a process similar to that of the coating film, the colloid is dissolved in an organic solvent, and the rubber is roll coated on the substrate film by a concave anilox roll, so that the solvent volatilization is insufficient, and the odor is generated during operation. After the film is coated, the solvent evaporates and the surface is easy to foam. At the same time, since the hot melt adhesive is blended by several kinds of polymer materials, the temperature control is not good, which will cause degradation and cross-linking of the high molecular polymer in the hot melt adhesive, and the surface of the film is poor.[ lamination machine manufacturer ]Some pre-coated film colloids easily adhere to the outer surface of the substrate, resulting in poor winding. Since the adhesive layer is thin and the surface is not activated, defects such as insufficient adhesion to the printed matter are likely to occur. Since the hot melt adhesive is composed of several kinds of materials, the transparency after coating is significantly worse than that of the low temperature pure resin type pre-coated film.
Water-based coating
It is a method of processing the surface of printed products to improve the gloss, strength and aesthetic effect of the surface of the printed products. To measure the quality of the film, it is also necessary to examine its brightness, strength, and adhesion. The water-based wet film is favored by customers because of its high strength, easy recycling and non-polluting properties.
Curved film
It is a new transfer technology that can cope with complex workpieces and is suitable for different materials. It also greatly increases the added value of products due to vivid patterns and vivid colors. This technology is a special chemical treatment film, after printing a certain color pattern, it is sent to the surface of the water, using water pressure to write the pattern evenly on the surface of the product, while the coated film is automatically dissolved, washed and baked. After drying, a layer of transparent protective coating is applied, and the product has a completely different visual effect.
The coating process can be divided into cold (cold pressure) coating, hot (heating) coating and liquid coating according to the heat, pressure and material.[ automatic lamination machine ] Thermal coating technology refers to heating and pre-coating the adhesive on the diaphragm, through which the film is bonded to the printed product; while the cold coating is pressed, directly bonding the film to the printed product by the adhesive. Together. Both methods can produce various special films such as UV protective film, waterproof or anti-friction film. Recently, there has also been a new technology called "liquid film". Simply use a brush, a net gun, a roller or a special laminator to apply a film directly on the surface of the product. Although the technical operation is simple and the price is low, it is still not mature.
That is, when the coating film process is performed, the adhesive is applied to the film, and then hot pressed.
This is also the current popular processing method.
Pre-coated film
This process greatly simplifies lamination because the laminating equipment does not require a binder to heat the drying system.
The program is very convenient to operate, can be used with the start-up, has great production flexibility, no solvent smell, no environmental pollution, more importantly, it can completely avoid bubbles, delamination and other faults, and its finished product has high transparency and wide application prospects and promotional value. [ water based lamination machine ]
The pre-coated film structure is composed of a substrate and a glue layer. The substrate is usually a PET film and a BOPP film. From the viewpoint of material cost and processing technology, most of the pre-coated film substrates are made of BOPP film and have a thickness of 12-20 micrometers. The thickness is 5-15 microns. According to different processing equipment and process conditions, different thicknesses of glue layer are selected, and the glue layer is divided into hot melt adhesive and organic polymer low temperature resin plate. [ film lamination machine ] The difference between the two is that the hot melt adhesive is made by blending and modifying several materials of the main adhesive resin, the tackifier and the modifier, and the organic polymer resin is a single polymer low temperature copolymer.
Due to limitations in technology, production equipment, and raw materials, pre-coated films (mostly hot melt adhesives) produced by domestic equipment still have quality defects. Since the production process is a process similar to that of the coating film, the colloid is dissolved in an organic solvent, and the rubber is roll coated on the substrate film by a concave anilox roll, so that the solvent volatilization is insufficient, and the odor is generated during operation. After the film is coated, the solvent evaporates and the surface is easy to foam. At the same time, since the hot melt adhesive is blended by several kinds of polymer materials, the temperature control is not good, which will cause degradation and cross-linking of the high molecular polymer in the hot melt adhesive, and the surface of the film is poor.[ lamination machine manufacturer ]Some pre-coated film colloids easily adhere to the outer surface of the substrate, resulting in poor winding. Since the adhesive layer is thin and the surface is not activated, defects such as insufficient adhesion to the printed matter are likely to occur. Since the hot melt adhesive is composed of several kinds of materials, the transparency after coating is significantly worse than that of the low temperature pure resin type pre-coated film.
Water-based coating
It is a method of processing the surface of printed products to improve the gloss, strength and aesthetic effect of the surface of the printed products. To measure the quality of the film, it is also necessary to examine its brightness, strength, and adhesion. The water-based wet film is favored by customers because of its high strength, easy recycling and non-polluting properties.
Curved film
It is a new transfer technology that can cope with complex workpieces and is suitable for different materials. It also greatly increases the added value of products due to vivid patterns and vivid colors. This technology is a special chemical treatment film, after printing a certain color pattern, it is sent to the surface of the water, using water pressure to write the pattern evenly on the surface of the product, while the coated film is automatically dissolved, washed and baked. After drying, a layer of transparent protective coating is applied, and the product has a completely different visual effect.
The coating process can be divided into cold (cold pressure) coating, hot (heating) coating and liquid coating according to the heat, pressure and material.[ automatic lamination machine ] Thermal coating technology refers to heating and pre-coating the adhesive on the diaphragm, through which the film is bonded to the printed product; while the cold coating is pressed, directly bonding the film to the printed product by the adhesive. Together. Both methods can produce various special films such as UV protective film, waterproof or anti-friction film. Recently, there has also been a new technology called "liquid film". Simply use a brush, a net gun, a roller or a special laminator to apply a film directly on the surface of the product. Although the technical operation is simple and the price is low, it is still not mature.
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