Polypropylene/polyethylene composite medical packaging film

A packaging film and polypropylene technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of unstable ratio control of the main agent and curing agent, complicated composite process conditions, and not widely used, and achieve excellent thermal Stability, save raw materials, improve the effect of market competitiveness

Inactive Publication Date: 2013-03-20
NINGBO HUAFENG PACKAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry lamination process is characterized by simple operation and flexible interlayer collocation, but its biggest defect is that the surface tension of the adhesive layer is relatively high. Although the adhesive solvent is dried with a large power, it is inevitable that there will be solvent residues. , and waste of energy, dry waste gas and volatilization of organic solvents will also pollute the environment
There is no solvent residue in the compounding process of solvent-free compounding, and there is no exhaust gas emission to pollute the environment. However, due to various factors such as unstable control of the ratio of the main agent and curing agent, and complex compounding process conditions, it has not been widely used.

Method used

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  • Polypropylene/polyethylene composite medical packaging film
  • Polypropylene/polyethylene composite medical packaging film
  • Polypropylene/polyethylene composite medical packaging film

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Embodiment Construction

[0030]The present invention will be further described below in conjunction with specific embodiments. Unless otherwise specified, the raw materials used in the present invention are all commercially available, and all production and preparation processes are carried out in a class 10,000 clean area (combined with polymer materials).

[0031] The first layer is the heat-sealing layer A, whose composition is a blended modified resin of metallocene polyethylene (mLLDPE) and ethylene methyl acrylate (EMA); wherein, the melt indices of the blended modified resin are 1.0 and 2.7 respectively , 5.1g / 10min, the density is 0.92, 0.95, 1.0g / cm 3 The content of vinyl acetate in the ethylene methyl acrylate is 35wt%; the amount of the metallocene polyethylene (mLLDPE) accounts for 20, 50, and 70wt% of the total amount of the blended modified resin;

[0032] The second layer is B layer, with a melt index of 3.0g / min and a density of 0.90g / cm 3 homopolypropylene.

[0033] The 3rd layer i...

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Abstract

The invention relates to a polypropylene / polyethylene composite medical packaging film with a seven-layer structure, which adopts mixed modified resin as a seal coat, and polypropylene / polyethylene mixed resin in various proportions as other layers. In comparison with the prior art, the polypropylene / polyethylene composite medical packaging film has the main advantages that 1) the packaging film is excellent in flexibility and formability; 2) an excellent heat-sealing strength with non-adhesive paper is guaranteed; 3) the packaging film is capable of effectively separating bacteria and resisting puncture, and is applied in a sterile environment; 4) the packaging film can guarantee stable contents, heat resistance, no generation of harmful substance migration and other sanitation performances; and 5) in comparison with the conventional dry-type composite process, the environmental friendliness is better improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polypropylene / polyethylene medical packaging film. Background technique [0002] Medical equipment packaging film has great market potential, and medical equipment has high requirements for packaging film. It not only needs to ensure the film's flexibility, formability, and good heat-sealing strength with uncoated paper, but also consider its barrier Hygienic properties such as bacteria, puncture resistance and content stability in a sterile environment, heat resistance and no migration of harmful substances, and environmental friendliness. [0003] Based on this, people are actively researching various new materials for medical equipment packaging to meet the multi-faceted and multi-level performance requirements of surgical medical equipment. [0004] Medical PP should meet the requirements of high purity, non-toxic, non-irritating, good chemical stability, no degr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B65D65/40
Inventor 陈亦锋鲁听徐建立
Owner NINGBO HUAFENG PACKAGE
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