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Preparation method for oxygen separating degradable plastic thin film

A technology for plastic films and degradable materials is applied in the field of preparation of oxygen-isolating and degradable plastic films, which can solve the problems of affecting packaging quality, poor oxygen-barrier properties of films, and lack of mechanical properties of film materials, and achieves easy industrialization and implementation. Environmental friendliness and high productivity

Inactive Publication Date: 2013-07-17
天津超平新材料科技有限公司
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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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  • Preparation method for oxygen separating degradable plastic thin film
  • Preparation method for oxygen separating degradable plastic thin film
  • Preparation method for oxygen separating degradable plastic thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0028] (1) Weigh LDPE, 100Kg; PBM degradation material, 50Kg; Pullulan polysaccharide, 40Kg; antioxidant 1010, 4 Kg; phenyl salicylate, 0.5Kg;

[0029] 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;

[0030] (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

[0032] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0033] (1) Weigh LDPE, 100Kg; PBM degradation material, 70Kg; Pullulan, polysaccharide 40Kg; antioxidant 1010, 4 Kg; phenyl salicylate, 1Kg;

[0034] 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;

[0035](3) Mix the masterbatch and PBM degradation material in step (2), extrude and blow the film by the plastic film blowing machine, the temperatu...

Embodiment 3

[0037] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0038] (1) Weigh LDPE, 100Kg; PBM degradation material, 60Kg; Pullulan, polysaccharide 30Kg; antioxidant 1010, 3 Kg; phenyl salicylate, 1Kg;

[0039] 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;

[0040] (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 a preparation method for an oxygen separating degradable plastic thin film. The method comprises the following steps of: (1) preparing a PBM (Plastic Master Batch) degradable material which is composited by full degradable natural high polymer material synthesized by main raw materials such as starch, plant grease and the like through special treatment with water soluble high polymer material and small amount of resin for later use; (2) mixing low density polyethylene, Pulullan and an antioxygen and an ultraviolet light absorber in a high speed mixer for 25-35 minutes; then, extruding and prilling in a twin-screw extruder to obtain master batch; and (3) mixing the master batch obtained by the step (1) with the PBM degradable material, and extruding and blowing by a plastic film blowing machine to obtain the product. According to the preparation method of the oxygen separating degradable plastic thin film, marketed mature modified starch degradable plastic master batch PBM and Pullulan and thin film grade LDPE are co-mixed, extruded and blown, so that the thin film has good mechanical property and degradability, and meanwhile has higher oxygen separating property.

Description

technical field [0001] The invention belongs to the field of plastic film materials, in particular to a preparation method of 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 agricu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L5/00C08L3/00C08J3/22B29C47/92B29B9/00B29C49/04B29C48/92
CPCB29C48/08B29C48/40
Inventor 朱凤超赵义平
Owner 天津超平新材料科技有限公司
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