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A kind of waterproof pre-coating film processing technology

A processing technology and pre-coating film technology, which is applied in the field of waterproof pre-coating film processing technology, can solve the problems of insufficient smoothness, clarity and color vividness, prone to curling, and uneven gloss, so as to avoid excessive drying temperature , avoid curling, high brightness effect

Active Publication Date: 2016-03-09
ZHEJIANG SHUNFU PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The lamination of printed matter includes two types of coating film and pre-coating film. The former coating film is a post-printing lamination process for printed matter that emerged in the 1960s. The process brings various disadvantages that cannot be overcome: first, due to the volatilization of organic solvent chemicals such as benzene solvents into the atmosphere during film covering, causing environmental pollution, and even easy to cause fires; second, because the surface of the product is often Bright spots or fog products with different gloss are prone to curling. If the glue application pressure is too high or the drying temperature is too high, the product is prone to serious curling; secondly, it is prone to foaming and stripping; in addition , the existing pre-coated film is covered on the printed matter, which has the defects of insufficient product smoothness, clarity and color vividness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use polypropylene film (BOPP) or polyester film (PET) as the bottom layer and polypropylene film (BOPP) as the substrate layer;

[0022] Ethylene-vinyl acetate (EVA) mixture and ethylene acrylic acid copolymer (EAA) by weight percentage: ethylene-vinyl acetate (EVA) mixture 80% and ethylene acrylic acid copolymer (EAA) 18%, ethylene-vinyl acetate mixture The content of VA in (EVA) is 19%, and the melt index is 15g / 10min. Add a high-speed mixer for stirring, and the stirring time is 8 minutes, as a hot melt adhesive layer;

[0023] Place the polypropylene film (BOPP) substrate roll on a continuous unwinding machine and unwind the substrate roll film. The tension range of the substrate roll film is 15 kg;

[0024] On the surface of polypropylene film (BOPP), a 17μm adhesive is cast and coated. The adhesive is a mica adhesive. The viscosity of the adhesive is 23cps, and the solid content of the adhesive is 2.4%. The coating speed is 320m / min, and the coating weight is 1....

Embodiment 2

[0030] Use polypropylene film (BOPP) or polyester film (PET) as the bottom layer and polypropylene film (BOPP) as the substrate layer;

[0031] Ethylene-vinyl acetate (EVA) mixture and ethylene acrylic acid copolymer (EAA) by weight percentage: ethylene-vinyl acetate (EVA) mixture 85% and ethylene acrylic acid copolymer (EAA) 15%, ethylene-vinyl acetate mixture The content of VA in (EVA) is 12%, and the melt index is 18g / 10min. Add a high-speed mixer for stirring, and the stirring time is 15 minutes, as a hot melt adhesive layer;

[0032] Place the polypropylene film (BOPP) substrate roll on a continuous unwinding machine and unwind the substrate roll film. The tension range of the substrate roll film is 16 kg;

[0033] On the surface of polypropylene film (BOPP), a 14μm adhesive is cast and coated. The adhesive is a mica adhesive. The viscosity of the adhesive is 17cps, and the solid content of the adhesive is 2.6%. The coating speed is 280m / min, and the coating weight is 1...

Embodiment 3

[0039]Use polypropylene film (BOPP) or polyester film (PET) as the bottom layer and polypropylene film (BOPP) as the substrate layer;

[0040] Ethylene-vinyl acetate (EVA) mixture and ethylene acrylic acid copolymer (EAA) by weight percentage: ethylene-vinyl acetate (EVA) mixture 83% and ethylene acrylic acid copolymer (EAA) 19%, ethylene-vinyl acetate mixture The content of VA in (EVA) is 20%, and the melt index is 17g / 10min. Add a high-speed mixer for stirring, and the stirring time is 12 minutes, as a hot melt adhesive layer;

[0041] Place the polypropylene film (BOPP) substrate roll on a continuous unwinding machine to unwind the substrate roll film, and the tension range of the substrate roll film is 23 kg;

[0042] On the surface of polypropylene film (BOPP), a 16μm adhesive is cast and coated. The adhesive is a mica adhesive. The viscosity of the adhesive is 19cps, and the solid content of the adhesive is 2.5%. The coating speed is 300m / min, and the coating weight is...

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Abstract

The invention discloses a waterproof pre-coating film processing technology, comprising the following steps: using polypropylene film or polyester film as the bottom layer, using polypropylene film as the base material layer; using ethylene-vinyl acetate mixture and ethylene acrylic acid copolymer according to Percentage by weight: ethylene-vinyl acetate mixture 79-85% and ethylene-acrylic acid copolymer 15-21%, stirring for 8-15 minutes, as a hot melt adhesive layer; unwinding, tension range 15-34 kg; on (BOPP) surface Tape coating with 14-17μm adhesive, corona pretreatment, drying, and calendering composite of the composite film and the bottom layer. The processing technology of the present invention does not release toxic substances, is environmentally friendly, has stronger adhesive force, high brightness, transparent adhesive film with high brightness and high viscosity, and the printed products are exquisite and of good quality. The film tension of the substrate roll can ensure the unfolding of the substrate and avoid curling of the substrate. The drying temperature and air speed are suitable to avoid cracks caused by excessive drying temperature.

Description

technical field [0001] The present invention relates to a film processing technology, in particular to a waterproof precoating film processing technology. Background technique [0002] Printed matter lamination is one of the important processes of post-press processing, which determines the final value of printed products. Printed matter lamination mainly refers to the plastic film covered on the paper printed matter in advance, with an adhesive in the middle, after heat and pressure treatment. , to make plastic film and paper two different properties bond together to form a paper / plastic integrated surface decoration processing technology. It protects and decorates printed matter, and is widely used in the field of packaging and printing. This film can make the surface of printed matter smoother and brighter, and at the same time prolong the service life of printed matter. [0003] The lamination of printed matter includes two types of coating film and pre-coating film. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/02B32B37/12B32B38/18B32B27/06B32B27/32B32B27/36C09J123/08
Inventor 黄国鑫黄国经黄国伟徐冬雪
Owner ZHEJIANG SHUNFU PRINTING