Packing materials of starch-polypropylene foam, an preparation method

A polypropylene foam and packaging material technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problem of insufficient degradation speed, and achieve the effect of accelerating the degradation speed.

Inactive Publication Date: 2005-01-12
杨凌沃林国际降解树脂发展有限公司 +1
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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 maintain the advantages of existing packaging materials that can be biodegraded, overcome the shortcomings of non-foaming and insufficient degradation speed, and provide a starch-polypropylene foam packaging material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Formula (by weight):

[0021] Starch 42 parts

[0022] Polypropylene 100 parts

[0023] 4 parts p-toluenesulfonyl semicarbazide

[0024] Sodium benzoate 0.8 parts

[0025] 2. 1.6 parts of 5-dimethyl-2,5-di-tert-butylperoxyhexane

[0026] Fatty acid glycerides 18 parts

[0027] 16 parts isopentane

[0028] 2. Preparation process:

[0029] a. According to the above formula, add all components except the physical blowing agent "isopentane" into the high-speed mixer according to the ratio, and stir evenly at room temperature;

[0030] b. Add the mixture obtained in step a into a twin-screw extruder with a T-shaped head and a preparation injection port on the barrel for segmental heating and extrusion of the barrel. The temperatures of each section of the barrel are: 110°C, 135°C ℃, 155°C, 165°C, 170°C, 165°C; while the barrel is heated and extruded in sections, inject the physical foaming agent "isopentane" into the formulation injection port of the twin-screw ext...

Embodiment 2

[0034] 1. Formula (by weight):

[0035] Starch 38 parts

[0036] Polypropylene 80 parts

[0037] 4 parts p-toluenesulfonyl semicarbazide

[0038] Sodium benzoate 0.6 parts

[0039] Dicumyl peroxide 1.6 parts

[0040] Fatty acid glycerides 16 parts

[0041] carbon dioxide 4 parts

[0042] 2. Preparation process:

[0043] a, b, c steps are identical with embodiment 1.

[0044] d. Laminating and bonding the finished sheet-shaped foam packaging material obtained in step c to reach the required thickness of the industrial product packaging material, and then cutting and rotary cutting according to the required packaging shape of the industrial product to make the industrial product packaging material.

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PUM

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Abstract

A biological foam degradable packing material of starch and polypropylene is made of starch, polypropylene, paramonotoluene sulfuryl semicarbazide, sodium benzoate, 2,5-dimethyl-2,5-ditert butyl peroxyhexane or diisopropylbenzene peroxide, fatty glyceride and isopentene or carbon dioxide. The preparing process includes mixing materials, heating, extruding, rolling and setting.

Description

technical field [0001] The invention relates to an easily degradable food packaging and industrial product packaging material, in particular to a biodegradable food packaging and industrial product packaging material. Background technique [0002] In order to gradually eliminate the white pollution caused by polystyrene foam packaging materials, some packaging materials have been changed to polyethylene foam packaging materials. Polyethylene foam plastics can be degraded when exposed to air (under the action of light, heat, and oxygen), but The degradation rate is much lower than that of polypropylene foam. However, whether it is polyethylene or polypropylene, they are difficult to biodegrade, that is to say, they cannot be degraded by deep burial, which is a difficult problem for domestic waste disposal. For this reason, Chinese patent CN1354197 uses starch, polypropylene and polyethylene as main ingredients to mix and make packaging materials, wherein starch can be biodeg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32C08J9/00C08K5/435C08L23/12
Inventor 李郁忠
Owner 杨凌沃林国际降解树脂发展有限公司
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