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An oxygen-barrier and biodegradable plastic film

A technology of plastic film and oxygen barrier, applied in the field of plastic film, can solve the problems of affecting packaging quality, poor oxygen barrier property of film, lack of mechanical properties of film material, etc., achieving easy industrialization implementation, realizing environmental friendliness and high production efficiency Effect

Inactive Publication Date: 2015-09-23
TIANJIN JINSHENGYU PLASTIC PROD SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third-generation product is a fully biodegradable plastic material obtained by extruding or injection molding thermoplastic starch, natural starch, amylose or high-amylose starch under high temperature, high pressure and high humidity conditions without adding polymers. research stage
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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  • An oxygen-barrier and biodegradable plastic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0027] (1) Weigh LDPE, 100Kg; PBM degradation material, 50Kg; Pullulan polysaccharide, 40Kg; antioxidant 1010, 4 Kg; phenyl salicylate, 0.5Kg;

[0028] ⑵According to the step ⑴ formula, mix LDPE, Pullulan polysaccharide, antioxidant 1010, phenyl salicylate, etc. in a conventional high-speed mixer for 30 minutes, extrude and granulate in a twin-screw extruder to form a masterbatch; extrude The temperatures of the four sections in the back section of the granulator barrel are 180°C, 190°C, 190°C, and 200°C respectively, the temperatures in the four sections in the front section of the barrel are 200°C, 210°C, 210°C, and 230°C, and the temperatures in the two sections of the machine head are respectively 230°C, 230°C;

[0029] (3) Mix the masterbatch and PBM degradation material in step (2), extrude and blow the film by the plastic film blowing machine, the temper...

Embodiment 2

[0031] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0032] (1) Weigh LDPE, 100Kg; PBM degradation material, 70Kg; Pullulan, polysaccharide 40Kg; antioxidant 1010, 4 Kg; phenyl salicylate, 1Kg;

[0033] ⑵According to the step ⑴ formula, mix LDPE, Pullulan polysaccharide, antioxidant 1010, phenyl salicylate, etc. in a conventional high-speed mixer for 30 minutes, extrude and granulate in a twin-screw extruder to form a masterbatch; extrude The temperatures of the four sections in the rear section of the granulator barrel are 180°C, 190°C, 190°C, and 200°C respectively; 230°C, 230°C;

[0034](3) Mix the masterbatch and PBM degradation material in step (2), extrude and blow the film by the plastic film blowing machine, the temperature of the four sections of the rear section of the blown film machine barrel is 180°C, 190°C, 190°C, 200°C, and the front section of the barrel The temperatures of the sections are 200°C...

Embodiment 3

[0036] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0037] (1) Weigh LDPE, 100Kg; PBM degradation material, 60Kg; Pullulan, polysaccharide 30Kg; antioxidant 1010, 3 Kg; phenyl salicylate, 1Kg;

[0038] ⑵According to the step ⑴ formula, mix LDPE, Pullulan polysaccharide, antioxidant 1010, phenyl salicylate, etc. in a conventional high-speed mixer for 25 minutes, extrude and granulate in a twin-screw extruder to form a masterbatch; extrude The temperatures of the four sections in the back section of the granulator barrel are 180°C, 190°C, 190°C, and 200°C respectively, the temperatures in the four sections in the front section of the barrel are 200°C, 210°C, 210°C, and 230°C, and the temperatures in the two sections of the machine head are respectively 230°C, 240°C;

[0039] (3) Mix the masterbatch and PBM degradation material in step (2), extrude and blow the film by the plastic film blowing machine, the temperat...

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Abstract

The invention relates to an oxygen-separating and degradable thin plastic film which contains the following raw constituents in parts by weight: 100 parts of low-density polyethylene, 50-70 parts of PBM (Plant Base Master batch), 20-40 parts of pullulan, 2-4 parts of antioxidant, and 0.5-1 part of ultraviolet light absorber. The excellent mechanical property of the thin film is guaranteed by utilizing the characteristics of LDPE (Low-Density Polyethylene), the environment friendliness of the thin film material is realized by utilizing the degradability of the PBM and the pullulan; the oxygen separating property of the thin film material is increased by utilizing the high oxygen separating property of the pullulan; the whole compatibility of the thin film material is increased by utilizing the structural similarity of starch and the pullulan as carbohydrates; and the oxygen separating property, the degradability and the like can be adjusted and controlled by controlling the blending proportion of LDPE / PBM / Pullulan systems.

Description

technical field [0001] The invention belongs to the field of plastic film materials, in particular to an oxygen-insulating and degradable plastic film. 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 packaging bags to agricultural films, to the she...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06B29C48/92
Inventor 朱凤超赵义平
Owner TIANJIN JINSHENGYU PLASTIC PROD SCI & TECH CO LTD
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