Modified polyamide composite membrane and preparation method thereof

A composite film, polyamide technology, applied in chemical instruments and methods, flexible coverings, synthetic resin layered products, etc., can solve the problems of increasing the adhesive layer, high production cost, complex structure, etc., and achieve good appearance. , Good compatibility, good thickness uniformity

Inactive Publication Date: 2013-07-03
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

[0007] The object of the present invention is to provide a kind of modified polyamide composite film and its preparation method, to solve the existing polyamide/polypropy

Method used

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  • Modified polyamide composite membrane and preparation method thereof
  • Modified polyamide composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: The preparation method of the polyamide composite film: the corona layer material selects 100 parts of polypropylene homopolymer resin with a melting index of 8g / 10min; the core layer selects 100 parts of modified polyamide, 8 parts of polypropylene terpolymer, propylene- 2 parts of hexene copolymer, 0.001 part of erucamide slip agent (made by blending and granulating 95% polypropylene and 5% high-purity erucamide, the same below); the heat-sealing layer is made of terpolymer copolymer 100 parts of resin, 0.001 part of erucamide slip agent, 0.001 part of synthetic wollastonite anti-blocking agent (made by blending and granulating 10% amorphous silica and 90% polypropylene, the same below). The above three layers of materials are melted through their respective single-screw extruders, and then film-formed through a batching block connector, T-shaped die head co-extrusion, casting and cooling. The product is subsequently cooled and shaped, thickness tested, c...

Embodiment 2

[0025] Example 2:The preparation method of the polyamide composite film: the corona layer material selects 100 parts of polypropylene homopolymer resin with a melt index of 8g / 10min; the core layer selects 100 parts of modified polyamide, 24 parts of polypropylene terpolymer, propylene- 6 parts of hexene copolymer, 0.002 part of erucamide slip agent; 100 parts of ternary copolymer polypropylene resin, 0.002 part of erucamide slip agent, and 0.002 part of synthetic wollastonite anti-blocking agent. The above three layers of materials are melted through their respective single-screw extruders, and then film-formed through a batching block connector, T-shaped die head co-extrusion, casting and cooling. The product is subsequently cooled and shaped, thickness tested, corona treated, online slitting, winding and packaging, and finally the finished product is obtained.

[0026] The preparation method of the modified polyamide is as follows: 100 parts of fully dried polyamide, 30 p...

Embodiment 3

[0027] Example 3: The preparation method of the polyamide composite film: the corona layer material selects 100 parts of polypropylene homopolymer resin with a melt index of 8g / 10min; the core layer selects 100 parts of modified polyamide, 40 parts of polypropylene terpolymer, propylene- 10 parts of hexene copolymer (comonomer content greater than 20%, propylene content of 8%), 0.003 parts of erucamide slip agent; 100 parts of terpolymer copolymer resin for heat sealing layer, 0.003 parts of erucamide slip agent parts, 0.003 parts of synthetic wollastonite anti-blocking agent. The above three layers of materials are melted through their respective single-screw extruders, and then film-formed through a batching block connector, T-shaped die head co-extrusion, casting and cooling. The product is subsequently cooled and shaped, thickness tested, corona treated, online slitting, winding and packaging, and finally the finished product is obtained.

[0028] The preparation method...

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Abstract

A modified polyamide composite membrane is formed by compounding a corona layer, a core layer and a heat seal layer, wherein the corona layer is prepared from polypropylene homopolymers, and is arranged on the upper surface of the core layer; the heat seal layer is arranged on the lower surface of the core layer; the core layer is prepared from modified polyamide, polypropylene copolymers, propylene-alpha olefin copolymers and an erucyl amide slipping agent; and the heat seal layer is prepared from copolypropylene resin, an erucyl amide slipping agent and a synthetic wollastonite anti-adhesion agent. Materials of all the layers are respectively added into a screw extruder to be melted, then are subjected to co-extrusion, tape casting and cooling molding by a connector and a die head, and next the materials are subjected to corona treatment, rolling, aging treatment, slitting and packing to obtain the finished product modified polyamide composite membrane. The compatibility of modified polyamide and polypropylene is good, the binding force among membrane layers is very strong, adhesive is not required, the production process is simplified, and the production cost is saved.

Description

technical field [0001] The invention relates to a polyamide composite film, in particular to a modified polyamide composite film and a preparation method thereof. Background technique [0002] In recent years, vigorously developing high value-added functional film packaging materials has become the development trend of plastic packaging materials in various countries in the world. Functional films usually have high technical content, but also have good economic benefits and strong market competitiveness, so they have attracted people's attention. Polypropylene has become the most widely used packaging material due to its low price, light weight, good resistance to environmental stress cracking, good impact resistance, low moisture absorption, easy processing and good elasticity of molded products. In the process of functionalization of materials, many new materials have been developed based on polypropylene. At present, the functional packaging films that have been industri...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/18B32B27/32B32B27/34C08L77/00C08L51/06C08L23/14C08K13/06C08K9/04C08K3/34B29C47/06B65D65/40
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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