Type of printing

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.

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.

Maintenance of laminating machine

1. Always check whether there is glue or grease on the rubber roller. Do not let the protective film directly stick to the rubber roller. Clean the glue, grease or dust on the rubber roller in time, especially some glues that are easy to cure. The surface of the rubber roller is clean and bright;

2. After each use of the machine, be sure to clean the machine immediately to avoid affecting the quality of the film during the next use. Wipe with glue thinner (alcohol or xylene) and rub the rollers with a soft towel. Blade) Touch and scrape the surface of the rubber roller, otherwise the flatness of the rubber roller will be destroyed or completely destroyed until it can not be used;

3. If the rubber roller 【 Hand Lamination Machine 】 needs to stop rotating for a long time, the heating of the heating pipe must be stopped first, so as to avoid the excessive temperature burning the rubber roller and affecting the temperature balance of the rubber roller surface, directly affecting the film coating effect;

4. Please stop heating after use, wait for the temperature to drop below 80 °C, then stop the rotation of the rubber roller and raise the rubber roller, and finally turn off the power; if there is automatic shutdown function, please select this function and then turn off the power;

5. It is necessary to ensure the cleanness of the laminating equipment for a long time, especially the cleaning of the rubber roller and the platform and the balance roller; every shift is checked once a day;

6. When filming, ensure that there is no sliding between the inner tube of the film 【 Sheet Lamination Machine 】 and the fixed card to avoid affecting the quality of the film due to uneven tension;

7. When operating the touch screen, please tap lightly, do not use too much or too much force, and do not touch the screen surface with hard objects;

8. Regularly add lubricating oil to each transmission part and sliding surface of the machine to ensure that the machine is in a good lubrication state. Especially the large bearing of the laminating roller is easy to volatilize due to the high pressure and high temperature. Add high-temperature lubricating oil in time (preferably add high-temperature lubricating oil every 50 hours in heating operation) to make it work normally under high temperature and high pressure. The lubricating oil should be regularly added at the rotating shaft to ensure reliable rotation;

9. When the laminating machine is used every day, lubricate the drive chain with a small amount of oil every month, and clean the chain once every six months. Every year, a thorough inspection of the machine is carried out, and problems are found to be solved in time.

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.

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.

Film Lamination and UV Coating

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.【Thermal Lamination Machine 】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, 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, 【 Film Lamination Machine 】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.

Instant Water-based Film Laminating Machine

Characteristics of instant coated products

Thermal Lamination Machine

(1) It is prone to foaming and film detachment. In large-area solid printing or high humidity working environment, foaming and film removal are particularly serious.
(2) The surface of the product often produces bright spots or fog points with different gloss.
(3) The product is prone to curling. If the pressure is too high when the glue is applied or the temperature is too high during drying, 【 Manual Lamination Machine 】 the curling phenomenon is more serious.
(4) Chemical substances such as organic solvents will volatilize into the atmosphere during filming, causing environmental pollution and even causing fires.


Characteristics of pre-coated film products
(1) The film-forming product using the molten pre-coating film does not exhibit foaming and film peeling, and the product has a long service life.
(2) The film-coated product using the solvent-evaporable pre-coating film may have a large thickness in the printing ink layer, where the folding, die-cutting, and indentation pressures are relatively large, or in a high-temperature environment, the film may be released and foamed. phenomenon.
(3) The solvent-evaporable pre-coating film easily adheres to impurities such as dust during production, 【Film Lamination Machine 】thereby affecting the surface effect of the film-coated product.
(4) The film product is basically free from curling.
It can be seen from the above that the pre-coating film coating process, especially the molten pre-coating film coating process has the advantage that the coating film coating process cannot match, and is an inevitable choice for the future film coating industry.

Short Introduction of Thermal Film Laminating Machine

Such kind of laminating equipment does not need adhesive heating and drying system, the laminating process greatly simplifies the laminating process, and the operation is very convenient. It can be used with the booting machine, and has great production flexibility, no solvent smell, no environmental pollution, and more importantly, it can be completely.[ Thermal Lamination Machine ] Avoiding bubbles, delamination and other failures, the finished product has extremely high transparency, and has broad application prospects and promotion value.


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. [ Automatic Thermal Lamination Machine ] 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. 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.


Pre-coated film laminating machine
The pre-coated film laminating machine is the least investment and the best film laminating equipment. It is because the pre-coating laminating machine adopts an environmentally-friendly laminating process and operates.Simple, low investment, easy to use, whether it is mass production, or a small amount of film, it can be used easily, and is widely used in the market.The laminating machine is a small laminating machine.[ Automatic Lamination Machine ] Therefore, the market potential of small laminating machines is huge, and products processed by laminating machines must have strong products.Market Competitiveness. We develop and sell a series of small laminating machines to bring the most affordable, most direct and most convenient services to the vast number of users.

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.

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.

Guideline on How to Use the Lamination Glue

                               
                                      Single-side Film Lamination Machine


Correct use
The glue placed statically for a long time will cause delamination and should be stirred evenly before use.

Wrong use
After using layered glue, the remaining glue will appear non-sticky.

Optimum bonding time
After the glue is evenly coated and reaches the applicable amount of paper, the roller is properly applied to the temperature to achieve rapid drying and fitting.

Optimum placement temperature
After the best temperature bonding, the product should be placed in a room of 15-40 degrees Celsius to achieve the best fit, no rebound, no layer (less than 15 degrees Celsius will reduce the paste effect)

                           
                                       Double-side Film Lamination Machine

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.

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.

Commonly Used Lamination Film Are ?

Commonly used plastic films are: polyvinyl chloride (PVC), polypropylene (BOPP) and polyester (PET) films. Among them, BOPP film (15-20pm) is flexible, non-toxic, high transparency and low price, and is an ideal composite material in the film coating process. [ thermal lamination machine ]


Depending on the properties of the film itself and the purpose of use, the thickness of the film is preferably between 0.01 and 0.02 mm. It must be treated by corona or other methods. The surface tension of the treated surface should be 4 Pa, so as to have better wettability and adhesion. The corona treatment surface should be uniform and the transparency should be as high as possible to ensure the best definition of the covered print. [ thermal laminator ] The transmittance of PET is generally 88-90%, and the transmittance of other films is usually between 92-93%. The film needs to have good light resistance, is not easy to change color under long-time illumination, and the geometric size is stable.


Since the film is in contact with a solvent, a binder, an ink, etc., it must have a certain chemical stability. The appearance of the film surface should be flat, without unevenness and wrinkles, and the film is required to have no bubbles, shrinkage holes, pinholes and pitting. Due to the limited adjustment ability of the laminating machine, it is also required that the rewinding is neat and the two sides are elastic and uniform to ensure uniform coating.[ lamination machine manufacturer ] Of course, the cost is low.

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.