Co-extruded PE (polyethylene) film and film blowing molding technology thereof

A technology of co-extrusion polyethylene and molding process, applied in the chemical field, can solve the problems of limited use scope and difficult printing of polyethylene materials, and achieve the effect of avoiding equipment safety and eliminating static electricity.

Inactive Publication Date: 2018-12-28
湖北冠誉塑料包装制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the problem that polyethylene materials are difficult to print, the usual polyethylene materials are colorless or light-colored products, which greatly limits their scope of use

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] In an embodiment of the present invention, a co-extruded polyethylene film includes an outer layer, a middle layer and an inner layer; the raw materials of the outer layer include 22% of low-density polyethylene and 78% of medium-density polyethylene according to mass percentage; The raw materials include 50% of high-density polyethylene and 50% of low-density polyethylene; the raw materials of the inner layer include 55% of high molecular material, 28% of low-density polyethylene, 16.5% of linear low-density polyethylene and 0.5% of additives according to mass percentage. The mass ratio of outer layer: middle layer: inner layer is 3:5:1. Among them, low-density polyethylene can be LDPE2420H, LDPETN00, LDPETX00, etc.; medium-density polyethylene can be MDPE5401, MDPE7520NT, etc.; high-density polyethylene can be HDPE5000S, HDPE8008, etc.; linear low-density polyethylene can be LLDPE7042, LLDPE1002, LLDPE920NT, LLDPE218W etc.; the polymer material is a thermoplastic elas...

Embodiment 2

[0029] In an embodiment of the present invention, a co-extruded polyethylene film includes an outer layer, a middle layer and an inner layer; the raw materials of the outer layer include 70% of low-density polyethylene and 30% of medium-density polyethylene according to mass percentage; The raw materials include 70% of high-density polyethylene and 30% of low-density polyethylene; the raw materials of the inner layer include 30% of high molecular material, 40% of low-density polyethylene, 29.7% of linear low-density polyethylene and 0.3% of additives according to mass percentage. The mass ratio of outer layer: middle layer: inner layer is 5:3:1. Among them, low-density polyethylene can be LDPE2420H, LDPETN00, LDPETX00, etc.; medium-density polyethylene can be MDPE5401, MDPE7520NT, etc.; high-density polyethylene can be HDPE5000S, HDPE8008, etc.; linear low-density polyethylene can be LLDPE7042, LLDPE1002, LLDPE920NT, LLDPE218W etc.; the polymer material is a thermoplastic elas...

Embodiment 3

[0031] In an embodiment of the present invention, a co-extruded polyethylene film includes an outer layer, a middle layer and an inner layer; the raw materials of the outer layer include 50% of low-density polyethylene and 50% of medium-density polyethylene according to mass percentage; The raw materials include 65% of high-density polyethylene and 35% of low-density polyethylene; the raw materials of the inner layer include 45% of high molecular material, 35% of low-density polyethylene, 19.8% of linear low-density polyethylene and 0.2% of additives according to the mass percentage. The mass ratio of outer layer: middle layer: inner layer is 2:8:1. Among them, low-density polyethylene can be LDPE2420H, LDPETN00, LDPETX00, etc.; medium-density polyethylene can be MDPE5401, MDPE7520NT, etc.; high-density polyethylene can be HDPE5000S, HDPE8008, etc.; linear low-density polyethylene can be LLDPE7042, LLDPE1002, LLDPE920NT, LLDPE218W etc.; the polymer material is a thermoplastic ...

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PUM

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Abstract

The invention discloses a co-extruded PE (polyethylene) film and a film blowing molding technology thereof. The co-extruded PE (polyethylene) film comprises an outer layer, a middle layer and an innerlayer, wherein raw materials of the outer layer comprise 22%-70% by mass of LDPE (low density polyethylene) and 30%-78% by mass of MDPE (medium density polyethylene); raw materials of the middle layer comprise 50%-70% by mass of HDPE (high density polyethylene) and 30%-50% by mass of LDPE; raw materials of the inner layer comprise 30%-55% by mass of a high polymer material, 20%-40% by mass of LDPE, 15%-30% by mass of linear LDPE and 0.1%-0.5% of an additive. The film blowing molding is realized by a three-layer co-extrusion film blowing machine, the co-extruded PE film with larger surface tension is prepared after corona treatment, and the co-extruded PE film can be widely applied to required product surfaces in various fields such as corrosion resistant plates, aluminum alloy sections, security doors, high-end furniture, high-grade handcrafts, floors, household appliance shells, instruments, apparatus and the like.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a co-extruded polyethylene film and its blown film forming process. Background technique [0002] Polyethylene material is a kind of thermoplastic resin obtained by polymerization of ethylene. It has excellent low temperature resistance, excellent electrical insulation, good chemical stability, and can withstand the erosion of most acids and alkalis. Polyethylene material at room temperature is insoluble in common solvents and has low water absorption, so it is widely used in the manufacture of films, hollow products, fibers and daily necessities. [0003] Due to the problem that polyethylene materials are difficult to print, common polyethylene materials are colorless or light-colored products, which greatly limits their scope of use. Contents of the invention [0004] The object of the present invention is to provide a kind of co-extrusion polyethylene film and its blown fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/28B29C71/00B32B27/32B32B27/06B32B27/18
CPCB29C55/28B29C71/0081B32B27/08B32B27/18B32B27/32B32B2307/75
Inventor 蔡学林
Owner 湖北冠誉塑料包装制品有限公司
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