A kind of three-layer co-extruded blown polypropylene film and its preparation method and application

A polypropylene film, terpolymer polypropylene technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the loss of film welding performance, high temperature sterilization resistance, welding temperature High problems, to achieve excellent high temperature sterilization resistance, improved tearability, and good welding performance.

Active Publication Date: 2020-05-12
LANGHUO MEDICAL MATERIAL BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, because the film adopts a single-layer structure, the film can withstand high temperature while losing the welding performance of the film, making the film easy to deform during the welding process
[0007] In general, the films currently used in the market have disadvantages such as poor tearability, high temperature sterilization resistance, and high welding temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a co-extruded blow-molded non-notch easy-to-tear polypropylene film and a preparation method thereof, the preparation method comprising the following steps:

[0045] The outer layer material forming the outer layer, the middle layer material forming the middle layer, and the inner layer material forming the inner layer are physically blended with the polypropylene and additives used according to the formula, wherein:

[0046] The material formula of the outer layer is: based on the total weight of the polypropylene matrix of the layer as 100%, homopolypropylene: 60wt.%; random copolymerized polypropylene: 40wt.%. The nucleating agent is sodium 2,2'-methylene bis(4,6-di-tert-butyl-phenyl)-phosphate, which is 0.2 wt.% of the total weight of the polypropylene matrix of the layer.

[0047] The material formula of the middle layer is: based on the total weight of the polypropylene matrix of this layer as 100%, homopolypropylene: 90wt.%; random copoly...

Embodiment 2

[0058] This embodiment provides a co-extruded blow-molded non-notch easy-to-tear polypropylene film and a preparation method thereof, the preparation method comprising the following steps:

[0059] The outer layer material forming the outer layer, the middle layer material forming the middle layer, and the inner layer material forming the inner layer are physically blended with the polypropylene and additives used according to the formula, wherein:

[0060] The material formula of the outer layer is: based on the total weight of the polypropylene matrix of this layer as 100%, homopolypropylene: 60wt.%; random copolymerized polypropylene: 40wt.%; nucleating agent: 1,3:2,4- Bis(3,4-dimethyl-benzylidene)-sorbitol at 0.15 wt.% of the total weight of the polypropylene matrix of the layer.

[0061] The material formula of the middle layer is: based on the total weight of the polypropylene matrix of this layer as 100%, homopolypropylene: 90wt.%; random copolymerized polypropylene: 10...

Embodiment 3

[0096] This embodiment provides a three-layer co-extruded blow-molded non-notch easy-to-tear polypropylene film and a preparation method thereof, the method comprising:

[0097] The outer layer material forming the outer layer, the middle layer material forming the middle layer, and the inner layer material forming the inner layer are physically blended with the polypropylene and additives used according to the formula, wherein:

[0098] The material formula of the outer layer is: based on the total weight of the polypropylene matrix of the layer as 100%, homopolypropylene: 70wt.%; random copolymerized polypropylene: 30wt.%. The nucleating agent was 1,3:2,4-bis(3,4-dimethyl-benzylidene)-sorbitol at 0.2 wt.% of the total weight of the polypropylene matrix of the layer.

[0099] The material formula of the middle layer is: based on the total weight of the polypropylene matrix of this layer as 100%, homopolypropylene: 90wt.%; random copolymerized polypropylene: 10wt.%. The polys...

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Abstract

The invention relates to a three-layer co-extrusion blow-molding polypropylene thin film and a preparation method and an application thereof. The polypropylene thin film is formed by three-layer co-extrusion blow molding of an outer-layer material forming an outer layer, a middle-layer material forming a middle layer and an inner-layer material forming an inner layer, wherein the middle-layer material is formed by blending homo-polypropylene, random copolymerized polypropylene and polystyrene. The polypropylene thin film is a non-notched and easy-tearing polypropylene thin film formed by three-layer co-extrusion blow molding, has the advantages of good easy-tearing property, high temperature resistance, good sterilization, good welding performance and the like, and satisfies the material performance requirements in the fields of medical packaging and food packaging.

Description

technical field [0001] The invention relates to a three-layer co-extrusion blow molding and its preparation method and application, in particular to a non-notch and easy-to-tear three-layer co-extrusion blow molding polypropylene film and its preparation method and application. Background technique [0002] Medical high-temperature cooking sterilization packaging, food cooking packaging, etc. are widely used in hospitals and people's daily life. When doctors or patients use medical supplies or people eat food, they have good high temperature sterilization resistance, weldability and ease of use. Tearability not only ensures the safety of the product but also facilitates people's use. [0003] At present, multi-layer packaging materials based on PE film are widely used in the market. Although they are colorless, odorless, non-toxic, have excellent low temperature resistance and chemical stability, and the preparation of the film is simple, etc., they are widely used in the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/32B32B27/20B32B33/00B29C55/28B65D65/40
CPCB29C48/0018B29C55/28B32B27/08B32B27/20B32B27/32B32B2307/306B32B2307/582B32B2307/7145B65D65/40
Inventor 张文芳王婧杨伟夺张浩
Owner LANGHUO MEDICAL MATERIAL BEIJING
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