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Extrusion stretching type pre-coating film and preparation method thereof

A pre-coating film and film-level technology, which is applied in the field of extrusion stretched pre-coating film and its preparation, to achieve the effects of reducing pollution, high mechanical performance, variety and flexibility

Active Publication Date: 2015-04-08
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process is complicated, the time is long, and the efficiency is low
The prepared precoat film has low mechanical strength and low peeling degree

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Mix 97% film-grade homopolypropylene and 3% silica to form an anti-blocking polypropylene masterbatch, then mix 2% anti-blocking polypropylene masterbatch and 98% film-grade homopolypropylene to form a functional layer material , and dried, and then melted and extruded at 210°C;

[0040] The material of the core layer, film-grade homopolypropylene, is dried, and then melted and extruded at 190°C;

[0041] Dry the ethylene-methyl acrylate copolymer, which is the material of the adhesive layer, and then melt-extrude it at 190°C;

[0042] Mix 0.5% antioxidant and 99.5% ethylene-vinyl acetate polymer to form a hot melt adhesive layer material, dry it, and then melt and extrude it at 200°C;

[0043] 2) Arrange the sheets after melting and extruding the above-mentioned layers of materials according to the order of the functional layer, core layer, adhesive layer and hot-melt adhesive layer, and heat them together at 230°C to form a composite sheet, and then pass through ...

Embodiment 2

[0049] 1) Mix 94% film-grade homopolypropylene and 6% silica to form an anti-blocking polypropylene masterbatch, then mix 4% anti-blocking polypropylene masterbatch and 96% film-grade homopolypropylene to form a functional layer material , and dried, and then melted and extruded at 260°C;

[0050] The material of the core layer, film-grade homopolypropylene, is dried, and then melted and extruded at 260°C;

[0051] Dry the ethylene-methyl acrylate copolymer, which is the material of the adhesive layer, and then melt-extrude it at 230°C;

[0052] Mix 2% antioxidant and 98% ethylene-vinyl acetate polymer to form a hot-melt adhesive layer material, dry it, and then melt and extrude it at 230°C;

[0053] 2) Arrange the sheets after melting and extruding the above-mentioned layers of materials in the order of functional layer, core layer, adhesive layer and hot-melt adhesive layer, and heat them together at 250°C to form a composite sheet, and then pass through Cool the cast slab...

Embodiment 3

[0059] 1) Mix 95% film-grade homopolypropylene and 5% silica to form an anti-blocking polypropylene masterbatch, then mix 3% anti-blocking polypropylene masterbatch and 97% film-grade homopolypropylene to form a functional layer material , and dried, and then melted and extruded at 240°C;

[0060] The material of the core layer, film-grade homopolypropylene, is dried, and then melted and extruded at 230°C;

[0061] Dry the ethylene-methyl acrylate copolymer, which is the material of the adhesive layer, and then melt-extrude it at 210°C;

[0062] Mix 1% antioxidant and 99% ethylene-vinyl acetate polymer to form a hot-melt adhesive layer material, dry it, and then melt and extrude it at 220°C;

[0063] 2) Arrange the sheets after melting and extruding the above-mentioned layers of materials in the order of functional layer, core layer, adhesive layer and hot-melt adhesive layer, and heat them together at 240°C to form a composite sheet, and then pass through Cool the cast slab...

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PUM

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Abstract

The invention provides an extrusion stretching type pre-coating film and a preparation method thereof. The pre-coating film sequentially consists of a functional layer, a core layer, a bonding layer and a hot melting glue layer from top to bottom, wherein the functional layer material is made of adhesive polypropylene masterbatch and a film-level homo-polypropylene; the core layer material is film-level homo-polypropylene; the bonding layer material is ethylene-methyl acrylate copolymer; the hot melting glue layer material is prepared from antioxidants and ethyl-vinyl acetate polymers. The extrusion stretching type pre-coating film is prepared by using a bidirectional stretching process and the coating by using a bottom sizing agent is eliminated, so that the process is simplified, and the mechanical strength and the stripping degree of the prepared pre-coating film are further improved, and the pre-coating film is more environmental friendly.

Description

Technical field: [0001] The invention relates to the technical field of printing films, in particular to an extruded stretched precoated film and a preparation method thereof. technical background: [0002] Since the birth of film coating technology, film coating technology has experienced three important development stages: solvent-based instant coating technology, water-based instant coating technology, and pre-coating film technology. Among them, the solvent-based ready-to-coat technology has many disadvantages. Because the adhesive used in it contains benzene solvents, it is harmful to the human body and the environment; and it needs to be dried and matured during lamination, which consumes a lot of energy and has low efficiency. The water-based ready-to-coat technology has problems such as low efficiency, low composite fastness, and poor quality stability, which are also restricted in use. Pre-coating film technology is a new type of film coating technology develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J123/08C08L23/12C08K3/36
Inventor 陈铸红张娜娜李永荃
Owner ANHUI GUOFENG PLASTIC
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