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High-starch-filled full-biodegradable film and preparation method thereof

A degradable film and whole biological technology, which is applied in the field of high starch-filled fully biodegradable film and its preparation, can solve problems such as the reduction of mechanical properties of materials, and achieve the effects of improved mechanical properties, simplified processing technology and low price.

Active Publication Date: 2021-07-13
广州无塑地球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

[0005] An object of the present invention is to provide a fully biodegradable film filled with high starch, which solves the problem that the mechanical properties of the material decrease when the starch filling is high, thereby further reducing the The cost of materials can meet the requirements of shopping bags and packaging bags

Method used

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  • High-starch-filled full-biodegradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 11.3% glycerin according to the weight ratio, add 1.5% N-methylolacrylamide, 1.3% glycidyl methacrylate, and mechanically stir for 30 minutes until the powder is completely dissolved to obtain a glycerin mixture. Add 45% starch, 5% talcum powder, 0.3% antioxidant 1010, 0.1% antioxidant 168, 0.3% antihydrolysis polycarbodiimide, 0.2% opening agent oleic acid amide into the high-speed mixer, add glycerin The mixed solution was slowly added from the top feeding port of the high-speed mixer and mixed for 5 minutes, and finally 35% polyadipate / butylene terephthalate was added and mixed for 2 minutes. Mix and granulate through a twin-screw extruder, and set the maximum temperature in the screw from the feed to the die head to be 100°C in the first zone, 160°C in the second zone, and 150°C in the third zone. The film is blown by a single-screw film blowing machine to obtain a film with a thickness of 30±3 microns, and the maximum temperature in the screw is set at 165°C....

Embodiment 2

[0027] Weigh 10% glycerin according to the weight ratio, add 0.5% N-methylolacrylamide and 1% glycidyl methacrylate, and stir mechanically for 30 minutes until the powder is completely dissolved to obtain a glycerin mixture. Add 44% starch, 3% talcum powder, 0.3% antioxidant 1010, 0.1% antioxidant 168, 0.3% antihydrolysis polycarbodiimide, 0.8% opening agent oleic acid amide into the high-speed mixer, add glycerin The mixed solution was slowly added from the top feeding port of the high-speed mixer and mixed for 5 minutes, and finally 44% polyadipate / butylene terephthalate was added and mixed for 2 minutes. Mix and granulate through a twin-screw extruder, and set the maximum temperature in the screw from the feed to the die head to be 110°C in the first zone, 160°C in the second zone, and 150°C in the third zone. The film is blown by a single-screw film blowing machine to obtain a film with a thickness of 29±3 microns, and the maximum temperature in the screw is set to 170°C. ...

Embodiment 3

[0029] Weigh 10% glycerin according to the weight ratio, add 0.5% N-methylolacrylamide and 0.5% glycidyl methacrylate, and stir mechanically for 30 minutes until the powder is completely dissolved to obtain a glycerin mixture. Add 35% starch, 2% talcum powder, 0.3% antioxidant 1010, 0.3% antioxidant 168, 0.6% antihydrolysis polycarbodiimide, 0.8% opening agent oleic acid amide into the high-speed mixer, add glycerin The mixed solution was slowly added from the top feeding port of the high-speed mixer and mixed for 5 minutes, and finally 50% polyadipate / butylene terephthalate was added and mixed for 2 minutes. Mix and granulate through a twin-screw extruder, and set the maximum temperature in the screw from the feed to the die head to be 120°C in the first zone, 160°C in the second zone, and 150°C in the third zone. The film is blown by a single-screw film blowing machine to obtain a film with a thickness of 30±3 microns, and the maximum temperature in the screw is set at 177°C...

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Abstract

The invention relates to the field of biodegradable materials, in particular to a high-starch-filled full-biodegradable film and a preparation method thereof. The full-biodegradable film is prepared from the following raw materials in percentage by weight: 35-50% of poly (adipic acid) / butylene terephthalate, 35-45% of starch, 6-15% of glycerol, 2-5% of an inorganic filler, 0.5-1.5% of N-hydroxymethyl acrylamide, 0.5-1.5% of glycidyl methacrylate and 1-3% of an additive, wherein the total amount of the raw materials is 100%. According to the invention, the process is simple, the starch content exceeds 35%, the production cost is low, and the film is high in strength, resistant to tear, good in stiffness, free of surface oil and suitable for disposable packaging materials.

Description

technical field [0001] The invention relates to the field of biodegradable materials, in particular to a fully biodegradable film filled with high starch and a preparation method thereof. Background technique [0002] Starch is a natural polymer material with abundant sources and low price, which can be completely degraded into water and carbon dioxide under natural conditions, and can be used as a filling material to reduce the cost of materials. Starch molecules contain strong intramolecular hydrogen bonds, making their melting point higher than the degradation temperature, so they cannot be melted and plasticized directly. Plasticizers containing hydroxyl groups such as glycerin, ethylene glycol, propylene glycol, sorbitol or other oligomers need to be added. The material is first plasticized to obtain thermoplastic starch, and then melted together with other polymers. Polybutylene adipate / terephthalate (PBAT) is a biodegradable polymer material that has been widely stud...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L67/02C08K13/02C08K5/053C08K3/34C08J5/18C08F251/00C08F283/02C08F220/58C08F220/32
CPCC08J5/18C08F251/00C08F283/02C08J2303/02C08J2467/02C08J2367/02C08J2403/02C08K13/02C08K5/053C08K3/34C08F220/58C08F220/325Y02W90/10
Inventor 黄永新莫文翔
Owner 广州无塑地球新材料科技有限公司
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