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.

Pre-coated Film Lamination is the Developing Trend

In China, I think there are four important reasons for the comprehensive replacement of pre-coated films: The first reason is that after 12 years of development, the whole industry has already recognized the pre-coated film, the pre-coated film is of good quality, and the pre-coated film. Environmental protection, which is recognized by the entire printing industry.

Now everyone knows that the industry is aware of pre-coated film, which is a very important point; the second point is the formation of industrial clusters.【Water Based Lamination Machine 】After 12 years of development, I believe that there are currently 30 manufacturers of pre-coated films in China. The third important factor is the cost reduction due to the improvement of industrial clusters and industrial technology. The original pre-coated film has three sentences, one sentence. It is good quality, one sentence is environmental protection, and one sentence is expensive. Many manufacturers use our products to proof, and do not produce after the completion of the test. Because he costs a lot. But today, the pre-coated film is already not expensive, and the pre-coated film is now flat with the solvent-based water-based film.The reduction in film cost is one reason for the overall replacement of the precoat film. Another important basis is the policy. 【Fully Automatic Lamination Machine 】A series of national policies will play an important role in promoting the development of pre-coated films, especially green printing.

The global market share is like this. According to the statistics of the National Press Center in 2009, the US pre-coated film has reached 95%, Japan has reached 70%, Europe has reached 60%, South Korea has reached 50%, and China in 2009. In April, the pre-coated film only accounted for 10%. China Information Center statistical pre-coating film accounted for 10%, water content accounted for 21%, solvent type accounted for 69%, today the number is greatly reduced, today water includes PUR glue and so on, and today's pre-coated film is not 10% It is also highly developed. This is 2009, because we want authoritative data. 【Automatic Film Laminating Machine 】This standard rose to the national standard in 2010, and it is clear in the standard that there are no contaminated items in the laminating machine. In particular, the signing of the green environmental protection agreement in 2010 will further promote the comprehensive replacement of the pre-coated film.   

Therefore, in order to develop the green and digital development of China's printing, and for the sake of national health, it is necessary to jointly promote the pre-coating film to be a comprehensive replacement for the benefit of the people.

Problems probably occurred during lamination process

Blistering

1. The printed ink layer is not dry. It should be hot pressed and then glued; delay the filming time and make it dry thoroughly.
2. The printed ink layer is too thick. The amount of adhesive applied should be increased to increase the pressure and compound temperature.
3. The drying temperature is too high and the surface of the adhesive is crusted. Should reduce the drying temperature
4. The surface temperature of the composite roll is too high. The composite roll temperature should be lowered.
5. The film has wrinkles or slack, and the film is uneven or curled. [ Lamination Machine Manufacturer ] The film should be replaced and the tension adjusted.
6. There are dust impurities on the surface of the film. It should be cleared in time.
7. The adhesive coating is uneven and the dosage is small. The amount of coating and uniformity should be increased.
8. The binder concentration is too high, the viscosity is large, and the coating is uneven. Apply a diluent to reduce the binder concentration.


Wrinkles

1. The film transfer roller is unbalanced. The transfer stick should be adjusted.
2. The ends of the film are inconsistent or wavy. [ Film Lamination Machine ] The qualified film should be replaced.
3. The glue layer is too thick, the solvent evaporation is not thorough, affecting the viscosity, squeezed by the pressure roller, and slippage between the paper and the film. The amount of glue should be adjusted to increase the temperature of the drying tunnel.
4. The electric heating roller and the rubber roller are unbalanced at both ends, the pressure is inconsistent, and the line speed is not equal. The two rollers should be adjusted.

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.

Description and highlights of the glueless laminating machine

Since the invention, the glueless laminating machine has been widely used in the printing industry, packaging industry, plastics production and other industries, and its role here has not been neglected. Especially in the use of packaging is even more essential. Coating on the outsourcing of the product not only makes it look more high-end grade, but also makes the packaged product reusable. [ Thermal Lamination Machine ]  This not only saves costs, but also protects the environment better.


After the non-adhesive laminating machine is used, the surface of the composite printed product is bright, crisp, colorful, high in strength, waterproof and moisture resistant; it can be widely used in textbooks, books, calendars, cards, product samples, packaging cartons. Plastic molding is the ideal equipment for printing factories and packaging and decoration, American printing factories and professional plastics factories to improve the quality of printed materials and reduce the cost of the process. [ Thermal Laminator ] Manual, semi-automatic and automatic types can be customized according to customer requirements.

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.

Brief Introduction of Industrial Film Laminating

The film coating is a process in which a plastic film is coated with a binder, and the paper printed product is heated and pressurized to bond it together to form a paper-plastic composite product. The film-coated printed product has a thin and transparent plastic film on the surface, and the surface is smoother and brighter, thereby improving the gloss and fastness of the printed product. The color of the graphic is more vivid, three-dimensional, and waterproof. Anti-fouling, abrasion resistance, folding resistance, chemical corrosion resistance, etc.[ Automatic Lamination Machine ]


Air bubbles caused by production processes. Mainly refers to the control of some process parameters, including composite pressure, coating temperature and composite temperature. If the composite pressure is too low, the rubber roller pressure should be increased appropriately.[ Lamination Machine Manufacturer ] The compounding speed is too fast, and the compounding speed can be appropriately lowered, or the temperature of the rubberizing roller can be increased to increase the fluidity of the adhesive. Air bubbles on the surface of the film caused by dust and impurities should improve the environmental sanitation of the production workshop.