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Method for preparing polyethylene freshness-retaining plastic bag

A plastic bag and polyethylene technology, which is applied in the field of plastic bags, can solve the problems of food rot and poor air permeability of plastic bags, and achieve the effect of non-toxic, harmless price, and excellent resistance to environmental stress cracking

Inactive Publication Date: 2016-11-23
ANHUI HUILONG PACKAGING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of polyethylene fresh-keeping plastic bags, using non-toxic and harmless raw materials, which solves the problem that the food is easy to rot in the bag due to the poor air permeability of the plastic bag when the current plastic bag is loaded with food for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A preparation method of a polyethylene fresh-keeping plastic bag, the plastic bag is composed of the following components in parts by weight: 65 parts of polyethylene resin, 15 parts of polypropylene, 10 parts of benzoic acid, 5 parts of polyvinyl alcohol, methyl methacrylate 5 parts of ester, described preparation method comprises the steps:

[0013] 1) Pour 65 parts of polyethylene resin, 15 parts of polypropylene, 10 parts of benzoic acid, 5 parts of polyvinyl alcohol, and 5 parts of methyl methacrylate into the container, stir for 30 minutes, and rotate at 240 rpm;

[0014] 2) The above raw materials are melted at a certain temperature, and then extruded and blown through the circular die of the screw extruder, dragged and cooled to form a film;

[0015] 3) Slitting and bag making.

[0016] Wherein, the polyethylene resin is a low-density polyethylene resin, the average molecular weight of the polyethylene resin is 9000-12000, the average molecular weight of the po...

Embodiment 2

[0018] A preparation method of a polyethylene fresh-keeping plastic bag, the plastic bag is composed of the following components in parts by weight: 70 parts of polyethylene resin, 10 parts of polypropylene, 8 parts of benzoic acid, 6 parts of polyvinyl alcohol, methyl methacrylate 6 parts of ester, described preparation method comprises the steps:

[0019] 1) Pour 70 parts of polyethylene resin, 10 parts of polypropylene, 8 parts of benzoic acid, 6 parts of polyvinyl alcohol, and 6 parts of methyl methacrylate into the container, stir for 28 minutes, and rotate at 250 rpm;

[0020] 2) The above raw materials are melted at a certain temperature, and then extruded and blown through the circular die of the screw extruder, dragged and cooled to form a film;

[0021] 3) Slitting and bag making.

[0022] Wherein, the polyethylene resin is a low-density polyethylene resin, the average molecular weight of the polyethylene resin is 9000-12000, the average molecular weight of the poly...

Embodiment 3

[0024] A method for preparing a polyethylene fresh-keeping plastic bag. The plastic bag is composed of the following components in parts by weight: 68 parts of polyethylene resin, 12 parts of polypropylene, 9 parts of benzoic acid, 7 parts of polyvinyl alcohol, methyl methacrylate 4 parts of ester, described preparation method comprises the steps:

[0025] 1) Pour the raw materials polyethylene resin, polypropylene, benzoic acid, polyvinyl alcohol, and methyl methacrylate into the container, stir for 29 minutes, and rotate at 245 rpm;

[0026] 2) The above raw materials are melted at a certain temperature, and then extruded and blown through the circular die of the screw extruder, dragged and cooled to form a film;

[0027] 3) Slitting and bag making.

[0028] Wherein, the polyethylene resin is a low-density polyethylene resin, the average molecular weight of the polyethylene resin is 9000-12000, the average molecular weight of the polypropylene is 6000-9000, the screw temper...

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PUM

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Abstract

The invention belongs to the field of plastic products and relates to a method for preparing a polyethylene freshness-retaining plastic bag. The plastic bag comprises, by weight parts, 60-75 parts of polyethylene resin, 10-25 parts of polypropylene, 8-15 parts of benzoic acid, 5-8 parts of polyvinyl alcohol and 3-8 parts of methyl methacrylate. The preparation method comprises the steps of mixing and then fusing the polyethylene resin, polypropylene, benzoic acid, polyvinyl alcohol and methyl methacrylate at a certain temperature, performing extrusion blow molding and traction cooling through a circular port die head of a screw extruder to form a film, and performing slitting and bag making to obtain the polyethylene freshness-retaining plastic bag. According to the method, the problem that at present, when foods are placed in a plastic bag for a long time, the foods rot easily in the bag is solved.

Description

technical field [0001] The invention relates to a plastic bag, in particular to a preparation method of a polyethylene fresh-keeping plastic bag. Background technique [0002] At present, the existing plastic packaging bags for food are basically made of polymer materials such as polyethylene. While such plastic packaging bags provide convenience, when the plastic bags are loaded with food for a long time, the air permeability of the plastic bags is poor. , food is easy to rot in the bag. The current plastic bags do not have excellent fresh-keeping ability. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of a polyethylene fresh-keeping plastic bag, which uses non-toxic and harmless raw materials, and solves the problem that the food is easy to rot in the bag due to the poor air permeability of the plastic bag when the plastic bag is loaded with food for a long time. [0004] In order to realize the above-mentione...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L29/04C08K5/09B29C49/04
CPCC08L23/06B29C49/04C08J5/18C08J2323/06C08J2423/12C08J2429/04C08L2203/16C08L2205/03C08L2207/066
Inventor 陈晖
Owner ANHUI HUILONG PACKAGING CO LTD