Preparation method of oxygen-insulation and degradable plastic film

A technology for plastic films and degradable materials, which is applied in the field of preparation of oxygen-insulated and degradable plastic films, can solve the problems of affecting packaging quality, poor oxygen-insulation properties of films, and lack of mechanical properties of film materials. Environmental friendliness and high production efficiency

Inactive Publication Date: 2018-04-24
天津市宝宏塑胶制品有限公司
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0025] (1) Weigh LDPE, 100Kg; PBM degradation material, 50Kg; Pullulan (Pullulan) polysaccharide, 40Kg; Antioxidant 1010, 4Kg; Phenyl salicylate, 0.5Kg;

[0026] 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;

[0027] (3) Mix the masterbatch and PBM degradation material in step (2), extrude and blow the film by the plastic film blowing machine, ...

Embodiment 2

[0029] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0030] (1) Weigh LDPE, 100Kg; PBM degradation material, 70Kg; Pullulan (Pullulan) polysaccharide 40Kg; antioxidant 1010, 4Kg; phenyl salicylate, 1Kg;

[0031] 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;

[0032](3) Mix the masterbatch and PBM degradation material in step (2), extrude and blow the film by the plastic film blowing machine, the ...

Embodiment 3

[0034] A kind of oxygen barrier and degradable plastic film, its preparation method comprises the following steps:

[0035] (1) Weigh LDPE, 100Kg; PBM degradation material, 60Kg; Pullulan (Pullulan) polysaccharide 30Kg; antioxidant 1010, 3Kg; phenyl salicylate, 1Kg;

[0036] 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;

[0037] (3) Mix the masterbatch and PBM degradation material in step (2), extrude and blow the film by the plastic film blowing machine, the...

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PUM

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Abstract

The invention belongs to the field of plastic film materials, and particularly relates to a preparation method of an oxygen-insulation and degradable plastic film. The preparation method is characterized by comprising the following steps: (1) mixing low-density polyethylene, pullulan, an antioxidant and an ultraviolet absorbent in a high-speed mixer for 25-35 minutes, and carrying out extruding granulation in a twin-screw extruder to obtain a master batch; and (2) mixing the master batch with a PBM degradation material, and carrying out extruding film blowing by adopting a plastic film blowingmachine to obtain the product. The oxygen-insulation and degradable plastic film provided by the invention can automatically decompose under the action of enriched oxygen and microorganisms, so thatdiscarded films can be completely degraded and digested by microorganisms in natural, and finally, carbon dioxide and water are generated. Compared with a LDPE film with a same thickness, the oxygen-insulation and degradable plastic film provided by the invention has an oxygen-insulation property improved by 40%. The preparation method provided by the invention has a simple process, high production efficiency and easy industrialization, and can be produced by using a common plastic film blowing machine.

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): C08L23/06C08L3/02C08L3/04C08L91/00C08L5/02C08K5/134B65D65/46
CPCB65D65/466C08J5/18C08J2323/06C08J2405/02C08K2201/014C08L23/06C08L2201/06C08L2201/14C08L2203/16C08L2205/035C08L2207/066C08L3/02C08L3/04C08L91/00C08L5/02C08K5/1345Y02W90/10
Inventor 刘建军
Owner 天津市宝宏塑胶制品有限公司
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