A kind of multi-layer co-extruded embossed film and its preparation method

A technology of co-extrusion and patterned film, which is applied in the field of multi-layer co-extruded patterned film and its preparation, can solve the problems of poor bearing performance of single-layer plastic structure, failure to satisfy consumers, poor air tightness, etc., and achieve low cost , various functions, good sealing effect

Active Publication Date: 2019-09-10
东莞市博晨塑料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The material of the existing vacuum bag is generally a single-layer plastic structure, which is not strong and has poor airtightness. After vacuuming, it will leak in just a few days or even a few hours, which is not applicable.
Moreover, the single-layer plastic structure has poor bearing performance and is easily damaged, which cannot meet the needs of consumers.

Method used

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  • A kind of multi-layer co-extruded embossed film and its preparation method
  • A kind of multi-layer co-extruded embossed film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A multi-layer co-extruded textured film, the film is sequentially composed of a first PA layer, a second bonding PE layer, a third EVOH, a fourth bonding PE layer and a fifth PE layer.

[0024] The raw material of the first PA layer has a melting temperature of 230-260°C and a density of 1.08g / cm 3 nylon.

[0025] The raw materials of the second adhesive PE layer and the fourth adhesive PE layer include third LLDPE and fourth LLDPE with a weight ratio of 0.8:1. The third LLDPE has a melt index of 1.5g / 10min and a density of 0.914g / cm 3 The linear low density polyethylene; the fourth LLDPE has a melt index of 1.5g / 10min and a density of 0.916g / cm 3 of linear low density polyethylene.

[0026] The raw material of the third EVOH layer has a melt index of 5.7g / 10min and a density of 1.17g / cm 3 ethylene-vinyl alcohol copolymers.

[0027] The raw materials of the fifth PE layer include LDPE, MLLDPE and fifth LLDPE in a weight ratio of 3:6:1. The LDPE has a melt index of...

Embodiment 2

[0031] A multi-layer co-extruded textured film, the film is sequentially composed of a first PA layer, a second bonding PE layer, a third EVOH, a fourth bonding PE layer and a fifth PE layer.

[0032] The raw material of the first PA layer has a melting temperature of 250°C and a density of 1.18g / cm 3 nylon.

[0033] The raw materials of the second adhesive PE layer and the fourth adhesive PE layer include third LLDPE and fourth LLDPE with a weight ratio of 1.0:1. The third LLDPE has a melt index of 2.0g / 10min and a density of 0.922g / cm 3 The linear low density polyethylene; the fourth LLDPE has a melt index of 2.0g / 10min and a density of 0.920g / cm 3 of linear low density polyethylene.

[0034] The raw material of the third EVOH layer has a melt index of 5.7g / 10min and a density of 1.15g / cm 3 ethylene-vinyl alcohol copolymers.

[0035] The raw materials of the fifth PE layer include LDPE, MLLDPE and fifth LLDPE in a weight ratio of 5:4:1. The LDPE has a melt index of 2.0...

Embodiment 3

[0039] A multi-layer co-extruded textured film, the film is sequentially composed of a first PA layer, a second bonding PE layer, a third EVOH, a fourth bonding PE layer and a fifth PE layer.

[0040] The raw material of the first PA layer has a melting temperature of 235°C and a density of 1.12g / cm 3 nylon.

[0041] The raw materials of the second adhesive PE layer and the fourth adhesive PE layer include third LLDPE and fourth LLDPE with a weight ratio of 1.2:1. The third LLDPE has a melt index of 2.5g / 10min and a density of 0.920g / cm 3 The linear low density polyethylene; the fourth LLDPE has a melt index of 2.0g / 10min and a density of 0.924g / cm 3 of linear low density polyethylene.

[0042] The raw material of the third EVOH layer has a melt index of 5g / 10min and a density of 1.19g / cm 3 ethylene-vinyl alcohol copolymers.

[0043] The raw materials of the fifth PE layer include LDPE, MLLDPE and fifth LLDPE in a weight ratio of 3:5:1. The LDPE has a melt index of 1.8g / ...

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Abstract

The invention provides a novel multilayer coextruded embossed membrane and a preparation method thereof. The membrane consists of a first PA layer, a second adhesive PE layer, a third EVOH or PA layer, a fourth adhesive PE layer and a fifth PE layer in sequence. The five-layer coextruded membrane is high in water resistance performance, high in oxygen resistance performance and good in sealing effect, and is further relatively high in tensile strength, heat resistance, cold resistance, photopathy, permeability resistance and chemical stability, multifunctional and low-cost; furthermore, a bag body made of the novel multilayer coextruded corrugated membrane is processed by coextruding an environmentally-friendly material, so that no solvent residual damage is caused, and the bag body is very suitable for being used at home.

Description

technical field [0001] The invention relates to the field of thin film technology, in particular to a multilayer co-extruded grained film and a preparation method thereof. Background technique [0002] The material of the existing vacuum bag is generally a single-layer plastic structure, which is not strong and has poor airtightness. After vacuuming, it will leak in just a few days or even a few hours, so it is not suitable for use. Moreover, the single-layer plastic structure has poor bearing performance and is extremely easy to be damaged, which cannot meet the needs of consumers. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention provides a multi-layer co-extruded textured film and its preparation method. The multi-layered co-extruded textured film has high water resistance and high oxygen resistance and good sealing effect , also has good tensile strength, heat resistance, cold resistance, light-shielding, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B27/34B32B7/12B32B33/00B29C69/02B29C48/08B29C48/21B29C48/92
CPCB29C48/002B29C48/18B29C48/92B29C2948/92704B32B7/12B32B27/08B32B27/306B32B27/32B32B27/34B32B33/00B32B2307/306B32B2307/41B32B2307/54B32B2307/7242
Inventor 李洪河雷伟黄新意
Owner 东莞市博晨塑料科技有限公司
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