A cast polypropylene straight composite film

A technology of casting polypropylene and polypropylene, which is applied in the field of polypropylene film, can solve problems such as poor stiffness and heat resistance, high thermal shrinkage deformation rate, and unstable thermal viscosity, so as to improve stiffness and temperature resistance Sexuality, smooth unwinding and slitting, and the effect of reducing the coefficient of friction

Inactive Publication Date: 2016-04-27
湖北慧狮塑业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a cast polypropylene direct lamination film to solve the problem that the existing cast film is difficult to obtain an ideal glue-free composite film, the stiffness and heat resistance of the existing product are poor, and the heat shrinkage deformation rate is high. , thermal viscosity is unstable, the application range is limited and other technical problems

Method used

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  • A cast polypropylene straight composite film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: this casting polypropylene direct laminating film, its release layer is made of 100 parts of polypropylene binary random copolymer resins and synthetic wollastonite release agent (10% silicon dioxide or synthetic china clay or glass microspheres and 90% polypropylene blending and granulation, the same below) is composed of 0.002 parts; the core layer is composed of 100 parts of polypropylene homopolymer resin, 20 parts of ethylene-hexene copolymer, dibenzylidene sorbitol nucleating agent (DBS) 0.1 part and 0.0015 part of erucamide slip agent (95% polypropylene, 5% high-purity erucamide blended and granulated, the same below); the heat-sensitive functional layer is composed of ethylene-propylene copolymer (copolymer Composed of 100 parts of monomer content greater than 20%, ethylene content of 8%), 30 parts of maleic anhydride grafted ethylene-octene copolymer, and 30 parts of ethylene methyl acrylate copolymer (EMA). The above-mentioned three-layer materia...

Embodiment 2

[0020] Embodiment 2: The cast polypropylene direct laminating film, its anti-adhesive layer is composed of 100 parts of polypropylene binary random copolymer resin and 0.002 parts of synthetic silica; the core layer is made of 100 parts of polypropylene homopolymer resin, ethylene- 10 parts of hexene copolymer, 0.2 part of di-p-methyl-benzylidene sorbitol (MDBS) and 0.0015 parts of erucamide slip agent; the thermosensitive functional layer is composed of 100 parts of ethylene-propylene copolymer, grafted with maleic anhydride Composed of 35 parts of ethylene-octene copolymer and 35 parts of ethylene methyl acrylate copolymer (EMA). The above-mentioned three-layer materials are melted through their respective single-screw extruders, and then formed into a film through a batching block connector, a T-die co-extrusion and casting cooling. The product is subsequently cooled and shaped, thickness tested, corona treated, rolled, aged treated, cut and packaged to obtain the final pro...

Embodiment 3

[0021] Embodiment 3: The casting polypropylene direct laminating film, its anti-adhesive layer is made up of 100 parts of polypropylene binary random copolymer resin and 0.002 part of synthetic silicon dioxide; Core layer is made of 100 parts of polypropylene homopolymer resin, ethylene- Composed of 25 parts of hexene copolymer (comonomer content greater than 20%, ethylene content of 8%), 0.5 part of di-p-chlorobenzylidene sorbitol (CDBS) and 0.002 part of erucamide slip agent; the thermosensitive functional layer consists of Ethylene-propylene copolymer (comonomer content greater than 20%, ethylene content 8%) 100 parts, maleic anhydride grafted ethylene-octene copolymer 47 parts, ethylene methyl acrylate copolymer (EMA) 18 parts, ethylene Methacrylic acid (EMAA) 25 parts composition. The above-mentioned three-layer materials are melted through their respective single-screw extruders, and then formed into a film through a batching block connector, a T-die co-extrusion and cas...

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Abstract

An CPP (casting polypropylene) direct response membrane comprises an anti-sticking layer, a sandwich layer and a thermosensitive functional layer, wherein the sandwich layer is positioned between the anti-sticking layer and the thermosensitive functional layer, the thickness of the anti-sticking layer accounts for 10 to 20 percent of the total thickness, the thickness of the sandwich layer accounts for 40 to 60 percent of the total thickness, and the thickness of the thermosensitive functional layer accounts for 10 to 30 percent of the total thickness; the anti-sticking layer provided by the invention is made of propylene binary random copolymer with better temperature resisting performance and can provide better temperature endurance, so that a thin film is prevented from causing thermal contraction during direct response; the sandwich layer ensures that the stiffness and the temperature endurance of material are improved, the thermosensitive functional layer adopts a vinyl-type copolymer with higher hot sticking performance and ethylene-acrylic acid copolymer, the hot sticking problems of the material are reduced greatly, the material is enabled to have a better direct response performance, and adhesive is not required to be used when the material is combined with BOPP, BOPET thin film and print film. Therefore, the cost is lowered and the CPP straight complex membrane is beneficial to environmental protection.

Description

technical field [0001] The invention relates to a polypropylene film, in particular to a casting polypropylene direct lamination film. Background technique [0002] The so-called direct laminating film refers to a film that is thermally bonded and laminated directly with other substrates under a certain temperature and pressure. No adhesives and glues are used during the lamination process, and the entire lamination is completed in one step. [0003] General-purpose polypropylene resin is a non-polar polymer. There is no active reactive group in the propylene molecular chain, so its thermal bonding performance is poor, and it is difficult to combine with BOPP (biaxially oriented polypropylene film), BOPET (biaxially oriented polyester film) film) and other films and printing films are directly bonded by hot pressing. Generally, it needs to be laminated with BOPP, BOPET and other films and printing films by coating adhesive on the surface (such as dry lamination, extrusion l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B27/18
Inventor 王焕清罗建民武冬瑞卢长伟刘兵倪玉良
Owner 湖北慧狮塑业股份有限公司
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