Plastic substrate film for food packing and machining process thereof

A plastic base material and food packaging technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of sealing pollution, poor sealing performance, poor barrier performance, etc., and achieve good heat sealing performance, barrier properties and gas Good tightness and high heat sealing strength

Inactive Publication Date: 2012-03-21
DALIAN RUIXIANDA PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single-layer polyethylene film has poor barrier properties to oxygen and other gases. When packaging fried food, it is easy to cause pollution at the seal. The sealing performance of general liquid packaging polyethylene film (also known as inclusion sealing performance) Poor, can not meet the requirements of its packaging process and storage period of packaged items, so it is necessary to use multi-layer polyethylene modified film or composite film with good barrier performance and inclusion sealing performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be further explained below in conjunction with specific examples. In the following examples, the manufacturing equipment of the plastic substrate film for food packaging is adopted: a three-layer co-extrusion traction rotary film blowing unit, consisting of three extruders, a die head, a shaping cage, a set of traction auxiliary machines, and a winder and other components; testing equipment are used: GBL-L electronic tensile testing machine and MXD-01 friction coefficient meter.

[0015] The raw materials are based on the ratio of LDPE30% for the inner layer, 20% for linear low-density polyethylene LLDPE, and 50% for metallocene linear polyethylene mLLDPE; the ratio for the middle layer is 40% for low-density polyethylene LDPE and 60% for linear low-density polyethylene; The outer layer is low-density polyethylene 40% LDPE, linear low-density polyethylene LLDPE 60%, the mass ratio between the inner layer, the middle layer and the outer layer i...

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PUM

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Abstract

The invention discloses a plastic substrate film for food packing. The plastic substrate film is formed by performing coextruding and blow molding on an inner layer, a middle layer and an outer layer, wherein the inner layer is made from low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE) and metallocene linear low-density polyethylene (mLLDPE); and both the middle layer and the outer layer are made from LDPE and LLDPE. The plastic substrate film for food packing has the characteristics of high barrier property, high airtightness, high pollution resistance, pressure resistance, impact resistance, high heat-sealing strength and high heat-sealing performance, and is accordant with the national food safety certification.

Description

technical field [0001] The invention relates to a food packaging material, in particular to a food packaging plastic substrate film and a processing technology thereof. Background technique [0002] The current food packaging industry requires a large number and variety of packaging substrate films, and it is difficult for films produced from a single raw material to meet the packaging requirements of special foods. Trace it to its cause, mainly is that although each manufacturer of plastic raw materials has its own advantages and disadvantages in production technology, each raw material has its shortcomings, so the films produced are difficult to meet the needs of various situations. Although some companies also adopt the practice of mixing different raw materials, the effect is not ideal due to the lack of necessary test equipment and testing equipment and systematic test plans. [0003] Plastic substrate films for food packaging are usually produced by blow molding from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32C08L23/08C08L23/06B65D65/40B29C55/28B29C47/92B29C48/92
CPCB29C48/10B29C48/92B29C2948/92704B29C2948/92895
Inventor 梁继鹏
Owner DALIAN RUIXIANDA PLASTIC CO LTD
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