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Degradable fresh-keeping plastic thin film and preparation method thereof

A technology of plastic film and degradable material, which is applied in the field of fresh-keeping degradable plastic film and its preparation, can solve the problems of lack of mechanical properties of film materials, poor oxygen barrier properties of film, and affecting packaging quality, etc. It is easy to achieve industrialization and realize Environmental friendliness and high production efficiency

Inactive Publication Date: 2017-10-27
安徽华猫软包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the plastic film material with high starch content has good biodegradability, the mechanical properties of the film material are lacking, and the oxygen barrier property of the film is not good. When it is used in the packaging fields of food and medicine, it has different degrees of air permeability and seriously affects it. quality of packaging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A fresh-keeping degradable plastic film, its raw material components and parts by weight are respectively: 60 parts of high-density polyethylene, 40 parts of low-density polyethylene, 60 parts of PBM degradation material, 30 parts of pullulan polysaccharide, poly(two Propylene glycol) 5 parts of phenyl phosphite, 3 parts of phenyl salicylate.

[0017] A kind of preparation method of fresh-keeping degradable plastic film of the present invention, comprises the following steps:

[0018] (1) Mix high-density polyethylene, low-density polyethylene, pullulan, poly(dipropylene glycol) phenyl phosphite, and phenyl salicylate in a high-speed mixer for 20 minutes, and then mix them in a twin-screw extruder Extrusion granulation to obtain master batches. The temperature of the rear section of the twin-screw extruder barrel is controlled in four sections at 150°C, the temperature of the front section of the barrel is controlled in four sections at 180°C, and the temperature of the...

Embodiment 2

[0021] A fresh-keeping degradable plastic film, its raw material components and parts by weight are respectively: 40 parts of high-density polyethylene, 30 parts of low-density polyethylene, 50 parts of PBM degradation materials, 10 parts of pullulan polysaccharide, poly(two Propylene glycol) 3 parts of phenyl phosphite, 2 parts of phenyl salicylate.

[0022] A kind of preparation method of fresh-keeping degradable plastic film of the present invention is characterized in that, comprises the following steps:

[0023] (1) Mix high-density polyethylene, low-density polyethylene, pullulan, poly(dipropylene glycol) phenyl phosphite, and phenyl salicylate in a high-speed mixer for 20 minutes, and then mix them in a twin-screw extruder Extrusion granulation to obtain master batches. The temperature of the rear section of the twin-screw extruder barrel is controlled in four sections at 150°C, the temperature of the front section of the barrel is controlled in four sections at 180°C, ...

Embodiment 3

[0026] A fresh-keeping degradable plastic film, its raw material components and parts by weight are respectively: 80 parts of high-density polyethylene, 50 parts of low-density polyethylene, 70 parts of PBM degradation material, 40 parts of pullulan polysaccharide, poly(two Propylene glycol) 8 parts of phenyl phosphite, 5 parts of phenyl salicylate.

[0027] A kind of preparation method of fresh-keeping degradable plastic film of the present invention is characterized in that, comprises the following steps:

[0028] (1) Mix high-density polyethylene, low-density polyethylene, pullulan, poly(dipropylene glycol) phenyl phosphite, and phenyl salicylate in a high-speed mixer for 50 minutes, and then mix them in a twin-screw extruder Extrusion granulation to obtain masterbatch, the temperature of the rear section of the twin-screw extruder barrel is controlled at 180°C in four sections, the temperature of the front section of the barrel is controlled in four sections, respectively ...

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PUM

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Abstract

The invention provides a degradable fresh-keeping plastic film and a preparation method thereof. The degradable fresh-keeping plastic film is prepared from the following raw materials in parts by weight: 40 to 80 parts of high density polyethylene, 30 to 50 parts of low density polyethylene, 50 to 70 parts of PBM degradable material, 10 to 40 parts of pulullan, 3 to 8 parts of poly(dipropylene glycol) phenyl phosphate, and 2 to 5 parts of phenyl salicylate. According to the preparation method of the degradable plastic film, the mature modified starch degradable plastic master batch PBM on the market is blended with pullulan and film-grade LDPE to be extruded and to blow a film, and good mechanical performance of the film is ensured by utilizing the characteristics of the LDPE; by utilizing the degradability of the PBM and Pullulan, the environment friendliness of the film material can be realized; and by utilizing the high oxygen insulation performance of the Pullulan, the oxygen insulation performance of the film material is improved.

Description

technical field [0001] The invention belongs to the technical field of plastic products, and in particular relates to a fresh-keeping degradable plastic film and a preparation method thereof. Background technique [0002] With the vigorous development of the food and pharmaceutical industries, the demand for new oxygen barrier packaging materials is more urgent than ever. It is an important and urgent strategic task to develop and research new oxygen barrier materials for food and pharmaceutical packaging. At present, the environmental pollution of packaging materials has attracted great attention from all over the world, and realizing the environmental friendliness of packaging materials has become one of the most attractive and challenging directions of material science research. [0003] Biodegradable plastics are one of the effective ways to control the environmental pollution caused by plastic waste and buffer the contradiction of petroleum resources, from food packagin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L5/02C08L85/02C08L67/04C08K5/134B65D65/46
CPCB65D65/466C08J5/18C08J2323/06C08J2367/04C08J2423/06C08J2467/04C08L23/06C08L67/04C08L2201/06C08L2201/14C08L2203/16C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L5/02C08L85/02C08K5/1345Y02W90/10
Inventor 程海生
Owner 安徽华猫软包装有限公司
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