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Degradable plastic bag and production method thereof

A technology for plastic bags and materials, applied in the field of degradable plastic bags and their preparation, can solve problems such as unsatisfactory antibacterial properties, and achieve the effects of reducing white pollution, improving wettability, and increasing mesh density

Inactive Publication Date: 2019-07-16
长沙而道新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antibacterial performance of the plastic bag cannot meet the needs of actual use

Method used

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  • Degradable plastic bag and production method thereof

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preparation example Construction

[0026] A kind of preparation method of degradable plastic bag that the present invention proposes, comprises the following steps:

[0027] S1: After drying the lignosulfonate, dissolve it in NaOH solution with a substance concentration of 10mol / L, heat and stir in a water bath, and raise the temperature to 70-80°C, then add epichlorohydrin and mix evenly, at 70-75°C After stirring under constant temperature reflux for 4-6 hours, washing until the pH value is 7, and vacuum drying at 100-110°C, the material I is obtained;

[0028] S2: Mix pentaerythritol, suberic acid and polylactic acid evenly, and carry out polycondensation reaction at 150-180° C. for 2-4 hours under nitrogen atmosphere to obtain material II;

[0029] S3. Add ethylene-acrylic acid copolymer, linear low-density polyethylene and polyvinyl alcohol to the material II, mix evenly, let cool, wash until neutral, and finally perform solid-liquid separation to obtain material III;

[0030] S4, mix material III with di...

Embodiment 1

[0033] A kind of degradable plastic bag, in weight part, comprises following raw material: ethylene-acrylic acid copolymer 100 parts, lignin sulfonate 18 parts, epichlorohydrin 6.5 parts, modified antibacterial agent 7.5 parts, linear low Density polyethylene 11 parts, polyvinyl alcohol 20 parts, polylactic acid 6 parts, pentaerythritol 6 parts, suberic acid 4.5 parts, diphenylmethane diisocyanate 3.5 parts, dioctyl phthalate 6.4 parts, silane coupling agent KH -5702.3 parts, 13 parts of bamboo fiber, 5.8 parts of potato starch, 4.9 parts of montmorillonite, 2.8 parts of konjac glucomannan, 5.2 parts of calcium carbonate, 3.3 parts of liquid paraffin, 5.8 parts of ethylene ethyl acrylate, 6.3 parts of glycerin, fat Acyl diethanolamine 5.8 parts.

[0034] The modified antibacterial agent is prepared according to the following process: 5.8 parts by weight of 3,4-dihydroxybenzaldehyde, 6.5 parts of sodium hexametaphosphate, 4.7 parts of diphenylmethane diisocyanate, 2.9 parts of ...

Embodiment 2

[0042] A degradable plastic bag, in parts by weight, comprising the following raw materials: 80 parts of ethylene-acrylic acid copolymer, 24 parts of lignosulfonate, 4 parts of epichlorohydrin, 10 parts of modified antibacterial agent, linear low Density polyethylene 8 parts, polyvinyl alcohol 25 parts, polylactic acid 4 parts, pentaerythritol 8 parts, suberic acid 3 parts, diphenylmethane diisocyanate 5 parts, dioctyl phthalate 4 parts, silane coupling agent KH -5703 parts, 9 parts of bamboo fiber, 8 parts of potato starch, 2 parts of montmorillonite, 5 parts of konjac glucomannan, 4 parts of calcium carbonate, 5 parts of liquid paraffin, 4 parts of ethylene ethyl acrylate, 9 parts of glycerin, fat Acyl diethanolamine 3 parts.

[0043]The modified antibacterial agent is prepared according to the following process: 4 parts by weight of 3,4-dihydroxybenzaldehyde, 9 parts of sodium hexametaphosphate, 2 parts of diphenylmethane diisocyanate, 5 parts of nitric acid with a mass fra...

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Abstract

The invention discloses a degradable plastic bag. The degradable plastic bag comprises the following raw materials of an ethylene-acrylic acid copolymer, lignosulfonate, epichlorohydrin, a modified antibacterial agent, linear low-density polyethylene, polyvinyl alcohol, polylactic acid, pentaerythritol, suberic acid, diphenylmethane diisocyanate, dioctyl phthalate, a silane coupling agent KH-570,bamboo fibers, potato starch, montmorillonoid, konjac glucomannan, calcium carbonate, liquid paraffin, ethylene acrylic ester, glycerin and fatty acyl diethanol amine. A production method of the degradable plastic bag is further provided. The produced degradable plastic bag has excellent antibacterial performance and mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of plastic bag preparation, and in particular relates to a degradable plastic bag and a preparation method thereof. Background technique [0002] Plastic is the most widely used polymer material, ranking first in the world in terms of volume. While the application of plastic has greatly facilitated people's lives, the white pollution caused by the increasing waste of plastic has become a world public hazard. my country's current production and use of plastics has leapt to the forefront of the world, producing millions of tons of non-degradable waste every year, seriously polluting the environment and endangering human health. Therefore, the research and production of degradable plastic products have attracted great attention internationally. Degradable plastics refer to the addition of a certain amount of additives (such as starch, modified starch or other cellulose, photosensitizers, biodegradants, etc.) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L97/00C08L29/04C08L67/04C08L97/02C08L3/02C08L5/00C08K5/12C08K5/5425C08K3/26C08J5/18
CPCC08J5/18C08K2003/265C08L23/0869C08L2201/06C08L2203/16C08L2205/035C08L23/0815C08L97/005C08L29/04C08L67/04C08L97/02C08L3/02C08L5/00C08K5/12C08K5/5425C08K3/26
Inventor 不公告发明人
Owner 长沙而道新能源科技有限公司
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