Digital pre-coating film and preparation method thereof

A pre-coating and digital technology, applied in the field of digital pre-coating, can solve the problems of affecting the composite effect and insufficient composite fastness of ordinary laminations, and achieve the effect of increasing composite fastness, reducing cracking or even separation, and increasing wetting performance.

Inactive Publication Date: 2019-02-15
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, digital printing paper has a lot of silicone oil and wax content, and ordinary laminations are prone to insufficient composite fastness, which affects the composite effect.

Method used

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  • Digital pre-coating film and preparation method thereof

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preparation example Construction

[0022] A preparation method of a digital pre-coating film, comprising the following steps:

[0023] Step 1, unwinding the substrate film layer and performing corona treatment on the inner surface of the substrate film layer;

[0024] Step 2, uniformly coating the polyethyleneimine solution on the inner surface of the substrate film layer, and drying, the concentration of the polyethyleneimine solution is 2.5-5.0%;

[0025] Step 3, under the oxidation of ozone, the mixture of ethylene-vinyl acetate polymer and tackifier is melt-extruded, and compounded on the surface of the primer layer by casting method, the ethylene-vinyl acetate polymer The melt index is 15-16g / 10min at 190°C and 2.16kg;

[0026] Step 4. Trimming and measuring the thickness of the prepared pre-coating film, and then performing high-frequency and high-voltage corona treatment on the hot-melt adhesive layer, and finally winding and cutting.

Embodiment 1

[0028] 1) Unwind the 15 μm biaxially oriented polypropylene film substrate and perform corona treatment on its inner surface;

[0029] 2) Uniformly coat a layer of primer solution with a polyethyleneimine content of 2.5% on the corona treated surface, and dry it in an oven at 70±10°C;

[0030] 3) At the same time of ozone oxidation, a mixture of 90% mass fraction of hot melt adhesive ethylene-vinyl acetate polymer and 10% mass fraction of terpene resin (the content of vinyl acetate is 28wt%, ethylene-vinyl acetate polymer The melt index is 15g / 10min under the conditions of 190°C and 2.16kg), melted and extruded at 220±5°C, and compounded on the surface of the primer layer by casting method to form a hot melt adhesive layer;

[0031] 4) Cooling on a cooling roll at 22±2°C, and finally trimming and measuring the thickness to obtain a pre-coating film with a total thickness of about 35 μm;

[0032] 5) Carry out high-frequency and high-voltage corona treatment on both sides of th...

Embodiment 2

[0034] 1) Unwind the 15 μm biaxially oriented polypropylene film substrate and perform corona treatment on its inner surface;

[0035] 2) Uniformly coat a layer of primer solution with a polyethyleneimine content of 5.0% on the corona-treated surface, and dry it in an oven at 70±10°C;

[0036] 3) while ozone oxidation, the mixture of the hot-melt adhesive ethylene-vinyl acetate polymer of 95% mass fraction and the petroleum resin of 5% mass fraction (the content of vinyl acetate is 28wt%, the content of ethylene-vinyl acetate polymer The melt index is 16g / 10min under the conditions of 190°C and 2.16kg), melted and extruded at 220±5°C, and compounded on the surface of the primer layer by casting method to form a hot melt adhesive layer;

[0037] 4) Cooling on a cooling roll at 22±2°C, and finally trimming and measuring the thickness to obtain a pre-coating film with a total thickness of about 35 μm;

[0038] 5) Carry out high-frequency and high-voltage corona treatment on both...

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Abstract

The invention discloses a digital pre-coating film which comprises a hot melt adhesive layer, a primer coating layer and a substrate film layer which are arranged in sequence, wherein the hot melt adhesive layer is a mixture of an ethylene-vinyl acetate polymer and a tackifier; the content of vinyl acetate is 28wt%; the primer coating layer is polyethyleneimine; the substrate film layer is a biaxially oriented polypropylene film or a biaxially oriented polyester film. The digital pre-coating film has the benefits that the flowability of the ethylene-vinyl acetate polymer is improved by regulating the content of the vinyl acetate in the ethylene-vinyl acetate polymer, meanwhile, the softening point of the ethylene-vinyl acetate polymer is reduced, and the adhesion property of the ethylene-vinyl acetate polymer is improved; the tackifier is added into the hot melt adhesive layer, so that the wetting capability and the adhesion property of a hot melt adhesive to a substrate can be improved through the tackifier, and furthermore, the bonding strength of the pre-coating film can be improved.

Description

technical field [0001] The invention relates to the technical field of digital pre-coating film, in particular to a digital pre-coating film and a preparation method thereof. Background technique [0002] Pre-coated film refers to the process of gluing and rewinding plastic film in advance, and then compounding it with paper prints. Firstly, the pre-coating film processing factory applies the glue solution on the film according to the usage specifications and format, and then rewinds it for the user to choose, and then compound it with the printed matter. Film lamination, that is, film sticking, is a processing technology in which plastic film is coated with an adhesive, and paper prints are bonded together after heating and pressure to form a paper-plastic product. The coated printed matter has a smoother and brighter surface due to the addition of a thin and transparent plastic film on the surface, thereby improving the gloss and fastness of the printed matter. Antifouli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/24C09J7/25C09J7/50C09J7/35C09J123/08C09J11/08
CPCC09J7/243C09J7/255C09J7/35C09J7/50C09J11/08C09J123/0853C09J2423/106C09J2467/006C09J2479/023C08L45/00C08L57/02
Inventor 刘昌民黄刚
Owner ANHUI GUOFENG PLASTIC
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