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Composite membrane for packing explosive

A composite film and explosive technology, used in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of non-recyclable products, complex composite film process, white pollution, etc., and achieve excellent transparency and gloss, tear strength. Good, low-cost effects

Inactive Publication Date: 2010-01-27
JINGMEN TIANHUA PACKING
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite film process is complicated and the cost is high. Because the composite process needs to be glued and compounded, the product cannot be recycled and easily causes white pollution.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0018] The slip-increasing masterbatch is an auxiliary agent, and commercially available products (trademark: SP306PP, S7310PP, S7320PP or S7216PP are all all right. The present invention is produced by a traditional three-layer co-extrusion production method, and the specific operation steps are: 100 kg of the upper film raw material polypropylene 1. Mix 2kg of smoothing masterbatch, middle film raw material low-density polyethylene and lower film raw material low-density polyethylene 40kg, linear low-density polyethylene 20kg, metallocene polyethylene 20kg, and smoothing masterbatch 1.5kg; then press The upper film raw material, the middle film raw material and the lower film raw material are sent to three extruders respectively, and are extruded into the co-extrusion die after being plasticized and metered. When the polymer melt flows out of the die, it is expanded, After stretching and thinning, it is cooled and shaped by the air ring and cooling water ring, introduced into...

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PUM

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Abstract

A composite membrane for packing explosive is composed of an upper membrane, an intermediate membrane and a lower membrane by coextrusion; wherein the upper membrane is composed of polypropylene and slip strengthening master batch, the intermediate membrane is low-density polyethylene; and the lower membrane is composed of low-density polyethylene, linear low-density polyethylene, metallocene polyethylene and slip strengthening master batch. The invention has the advantages that: 1, cost is low and about 20% of cost can be saved; 2, the composite membrane has excellent low temperature heat sealing performance and meets safety requirement of explosive; and the composite membrane has resistance to low temperature, good tear strengthen and excellent transparency and luster; 3, the product is formed in one step by adopting coextrusion technology, contains no binder and can be completely recycled.

Description

technical field [0001] The invention relates to the field of packaging films. In particular it relates to explosive wrapping films. Background technique [0002] Ordinary films cannot be heat-welded on one side on the automatic charging machine, and are easy to stick to the heat-welding cutter, and have poor airtightness. The existing composite film adopts PE / PET / PE structure, and the selection of different PE films can achieve good thermal welding effect, and has good air tightness, good dimensional stability, and excellent physical and mechanical properties. However, the composite membrane process is complicated and the cost is high. Because the composite process requires glue coating and compounding, the product cannot be recycled and easily causes white pollution. Contents of the invention [0003] The object of the present invention is to provide an environment-friendly explosive packaging composite film for the above-mentioned shortcomings of the original explosive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B32B27/18B32B27/32B29C47/06B29C47/08B29C47/78C08L23/06
Inventor 文仁会张健
Owner JINGMEN TIANHUA PACKING
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