Viscosity-increasing precoating film of biaxial tension

A biaxially stretched and biaxially stretched polyester technology, applied in the direction of coating, lamination, layered products, etc., can solve the problems of reducing the yield of lamination, machine burnout, cracking, etc., and achieve the effect of filling the market gap

Active Publication Date: 2009-04-08
KANGDE XIN COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology directly uses benzene-containing solvents in the coating process, which brings three major disadvantages that cannot be overcome due to its own process:
[0005] (1) Environmental protection issues: due to the volatilization and overflow of the toxic substance benzene, it causes air pollution and brings great harm to the health of producers and users; at the same time, the harmful substances remaining in the film are harmful to the health of consumers. adverse effects
[0006] (2) Quality problems: Since benzene, a volatile substance, continues to overflow after the film coating process, it is easy to form air bubbles between the film and the paper, making the surface of the printed product foggy,

Method used

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  • Viscosity-increasing precoating film of biaxial tension
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  • Viscosity-increasing precoating film of biaxial tension

Examples

Experimental program
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Effect test

Example Embodiment

[0051] Example 1: Taking a biaxially oriented polypropylene film (BOPP) with a width of 1580 mm as an example, a detailed description will be given.

[0052] Refer to figure 1 . Biaxially oriented polypropylene film (BOPP) tackifying pre-coated film, composed of base material 1, intermediate layer 2 and hot melt adhesive layer 3. The widths of the substrate 1, the intermediate layer 2 and the hot melt adhesive layer 3 are the same.

[0053] Biaxially oriented polypropylene film (BOPP) viscosity-increasing pre-coating film processing method:

[0054] 1. Preparation of materials for the intermediate layer 2 and hot melt adhesive layer 3

[0055] A. Preparation of materials for the middle layer 2: The polyethyleneimine (PEI) solution with a solid content of 5% is prepared in a container into a polyethyleneimine (PEI) solution with a solid content of 0.95%, and then alcohol is added (analysis) Pure), the weight ratio of 0.95% polyethyleneimine (PEI) aqueous solution to alcohol is 20:...

Example Embodiment

[0081] Example 2: Take a biaxially oriented polyester (BOPET) tackifying pre-coating film with a width of 1795 mm as an example for illustration

[0082] Embodiment 2 is basically the same as embodiment 1, but the differences are:

[0083]Substrate 1 adopts a biaxially oriented polyester (BOPET) tackifying pre-coated film with a width of 1795 mm, and the thickness of substrate 1 is 9 microns;

[0084] After the unwinding of step 2 is completed, the intermediate layer 2 of step 4 is directly applied, and the corona treatment process of step 3 is omitted;

[0085] The weight percentage of the ethylene-vinyl acetate (EVA) and ethylene-methyl acrylate copolymer (EMA) of the hot melt adhesive layer 3 is: ethylene-vinyl acetate (EVA) is 61%, and the ethylene-methyl acrylate copolymer ( EMA) is 39%, and the thickness of the composite hot melt adhesive layer 3 is 25 microns.

[0086] The total thickness of the substrate 1, the intermediate layer 2, and the hot melt adhesive layer 3 is ...

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Abstract

The invention relates to a bidirectional stretched precoating film with increased viscosity and a processing technology thereof. The precoating film comprises a base material, a middle layer and a hot melt adhesive layer, and is characterized in that the base material is a bidirectional stretched polyester (BOPET) film or a bidirectional stretched polypropylene (BOPP) film, the middle layer is made from polyethylene imine (PEI), and the hot melt adhesive layer is a mixture consisting of ethylene-vinyl acetate (EVA) and ethylene-methyl acrylate copolymer (EMA). The bidirectional stretched precoating film with the increased viscosity is obtained by using an extruded compound production line to evenly coat and clad the middle layer and the hot melt adhesive layer on one surface of the base material in turn. Because the resin adopted by the hot melt adhesive layer of the precoating film is the mixture consisting of the ethylene-vinyl acetate (EVA) and the ethylene-methyl acrylate copolymer (EMA), the precoating film has far larger cohesive force to printed matters than the precoating film of which the hot melt adhesive is pure EVA, and can remarkably show the high cohesive force particularly to the printed matters containing silicone oil ink or the printed matters containing water-based ink.

Description

[0001] Field [0002] The invention relates to the technical field of printing film, in particular to a biaxially stretched adhesion-increasing pre-coating film and processing technology. Background technique [0003] Laminating of printed matter is an important means of post-press processing, which determines the final value of printed products. The laminating process of printed matter refers to covering the paper printed matter with a plastic film, using an adhesive in the middle, and after heat and pressure treatment, the plastic film and paper are bonded together to form a paper / plastic composite. One surface decoration processing technology. It protects and decorates printed matter, and is widely used in packaging and printing fields, such as surface processing of book covers, propaganda albums, maps, advertising gift bags, and advanced packaging boxes. Coating film can be divided into two types, namely coating film and pre-coating film. [0004] Film coating technology is a p...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/30B32B37/15B32B38/04B32B38/16C08J7/04C08J7/12B29C71/00B29C59/10
Inventor 钟玉
Owner KANGDE XIN COMPOSITE MATERIAL CO LTD
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