Preparation method of full-biodegradable environment-friendly bag

An environmental protection bag, a fully biological technology, applied in the field of preparation of fully biodegradable environmental protection bags, can solve environmental hazards, difficult to deal with plastic waste and other problems, achieve the effect of small investment in the factory area, good water and oil resistance, and a single reactor

Inactive Publication Date: 2020-06-02
浙江欧力雅生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of a fully biodegradable environmental protection bag, to solve the problem that the wide application of plastic products in industry and daily life proposed in the above background technology has produced a large amount of plastic waste that is difficult to handle, forming a serious environmental problem. harm problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0025] Step 1: Take 30% starch and add 15% polyvinyl alcohol to mix for 30 seconds and 1.5% solubilizer in a high-speed mixer for 2 hours to obtain modified starch.

[0026] Step 2: Mix the modified starch with 20% polylactic acid and heat to 120°C, add 2.5% aluminate coupling agent and stir for 3 hours, dry at 80°C and mix in a double-drum mill for 1 hour;

[0027] Step 3: Add 6% glycerin to the mixed product and send it to the extruder for granulation to obtain a masterbatch, and add the additive ethylene-vinyl acetate copolymer (EVA) to the masterbatch and heat it to 240 ° C to melt, send Put it into the film blowing machine, carry out the film blowing work, and use the supporting mold to make the fully biodegradable environmental protection bag.

[0028] The fully biodegradable environmental protection bag is prepared, and the weight loss rate can reach 45% under the soil burial test conditions for 30 days, and the weight loss rate can reach 76% under the soil burial test ...

specific Embodiment 2

[0030] Step 1: Mix 60% of starch with 45% polyethylene for 30 seconds and 1.5% solubilizer in a high-speed mixer for 2 hours to obtain modified starch.

[0031] Step 2: Mix the modified starch with 50% polylactic acid and heat to 120°C, add 2.5% aluminate coupling agent and stir for 5 hours, dry at 90°C and mix in a double-drum mill for 1 hour;

[0032] Step 3: Add 10% glycerin to the mixed product and send it to the extruder for granulation to obtain a masterbatch, and add the additive polycaprolactone PCL to the masterbatch and heat it to 240°C to melt, and send it to the film blowing machine , carry out film blowing work, and use supporting molds to make fully biodegradable environmental protection bags.

[0033] The fully biodegradable environmental protection bag is prepared, and the weight loss rate can reach 47% under the soil burial test conditions for 30 days, and the weight loss rate can reach 79% under the soil burial test conditions for 60 days, and can be complete...

specific Embodiment 3

[0035] Step 1: Take 35% starch and add 35% PVA-1797 polyvinyl alcohol for 30 seconds and 1.5% solubilizer for 2 hours in a high-speed mixer to obtain modified starch.

[0036] Step 2: Mix the modified starch with 50% polylactic acid and heat to 120°C, add 2.5% aluminate coupling agent and stir for 3 hours, dry at 90°C and mix in a double-drum mill for 1 hour;

[0037] Step 3: Add 10% glycerin to the mixed product and send it to the extruder for granulation to obtain a masterbatch, and add the additive polyhydroxyalkanoate to the masterbatch and heat it to 240°C to melt, then send it to the film blowing machine , carry out film blowing work, and use supporting molds to make fully biodegradable environmental protection bags.

[0038] The fully biodegradable environmental protection bag has been prepared. After testing, the article that generates water vapor after packaging has the advantage of not condensing fog droplets inside the film, which plays a moisture-proof role. At th...

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PUM

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Abstract

The invention discloses a preparation method of a full-biodegradable environment-friendly bag. The method comprises the following steps: adding a solubilizer into starch, mixing the mixture with polylactic acid, carrying out plastifying by an internal mixer, carrying out granulating by an extruder to obtain a master batch, and carrying out film blowing to obtain the full-biodegradable environment-friendly bag. According to the preparation method of the full-biodegradable environment-friendly bag, the whole synthetic route is simple in process, the reactor is single, and the factory investmentis small; and during operation under normal pressure, the raw materials cannot release toxic gas and waste water, so that through comprehensive consideration, the risk is small; meanwhile, the main raw materials are starch and polylactic acid which are cheap and easy to obtain, and the prepared environment-friendly bag has excellent water resistance, oil resistance and the like; the environment-friendly bag has a proper shelf life and is not easy to deteriorate, is easily degraded after being discarded, and does not release pollutants after degradation, and causes no influence on the environment; toxic gas and other substances are not released in the use process; and the environment-friendly bag is non-toxic, harmless, odorless, and can adapt to a temperature interval of -20 DEG C-200 DEGC, so that the environment-friendly bag is suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of a fully biodegradable environmental protection bag. Background technique [0002] The plastics industry is a product industry and a new material industry. In recent years, with the rapid development of the national economy, especially the petrochemical industry, the plastics industry has developed rapidly. In 1998, the performance consumption of synthetic resin was about 149.4 million tons, and that of plastic products was 14.276 million tons. As an important industrial and consumer material, plastic materials and products have been widely used in industry, agriculture, packaging, high-tech fields and all aspects of people's lives. It has become the four pillar materials alongside steel, wood and cement. It is playing an increasingly important role in promoting the progress of the national economy and meeting people's living ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L67/04C08L23/08C08L29/04C08K5/053C08K5/10C08J5/18
CPCC08J5/18C08J2300/16C08J2303/02C08J2367/04C08J2400/16C08J2403/02C08J2423/08C08J2429/04C08J2467/04C08K5/053C08K5/10
Inventor 钟民杰
Owner 浙江欧力雅生物科技有限公司
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