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
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.
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
Instant Water-based Film Laminating Machine
Characteristics of instant coated products
(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.
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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