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Biodegradable thermoplastic starch resin for thin-film material, preparation method thereof and products thereof

A thermoplastic starch and biodegradation technology, which is applied in the field of biodegradable thermoplastic starch resin and its preparation, can solve the problems that the material strength cannot meet the use requirements, white pollution, and affect the ecological balance, etc., and achieve low product price and high biodegradation rate , the effect of good market value

Active Publication Date: 2012-02-08
NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the disposable products that people use daily are petroleum-based plastics. They are cheap, but they are all products that are difficult to degrade. Due to the gradual increase in the use of these products in recent years, white pollution has formed, causing Environmental pollution has affected the ecological balance, and more and more degradable plastic products have begun to emerge. However, the current degradable products always have one or another deficiency.
At present, it is more common to use petroleum-based plastic polyolefin materials as the carrier to prepare degradable plastics, or to use polylactic acid polymers prepared from natural substances to improve the biodegradability of degradable plastics. However, the strength of the processed materials Can not meet the requirements of use, and the cost of polylactic acid is relatively high
[0003] CN200510090456.2 discloses a biodegradable starch-containing resin composition, product and preparation method, which contains starch, polyol, ethylene-methyl acrylate copolymer, salt additives and polyolefin resin, although the The starch content in the resin is relatively high, but the strength of the composition still cannot fully meet the requirements of use

Method used

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  • Biodegradable thermoplastic starch resin for thin-film material, preparation method thereof and products thereof
  • Biodegradable thermoplastic starch resin for thin-film material, preparation method thereof and products thereof
  • Biodegradable thermoplastic starch resin for thin-film material, preparation method thereof and products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example is used to illustrate the biodegradable starch resin provided by the present invention and its preparation method.

[0024] The composition of raw materials is: 55 kg of food grade corn starch, 18 kg of glycerin, 7 kg of butanediol, 0.2 kg of stearic acid, 0.4 kg of calcium stearate, 2 kg of monoglyceride, 20 kg of ethylene-methyl acrylate copolymer, Low-density polyethylene 5 kg.

[0025] Among them, the water content of cornstarch is 13wt%; the density of monoglyceride is 0.916g / cm 3 , the ester content is 30%; the number average molecular weight of ethylene-methyl acrylate copolymer is 150,000, the molecular weight distribution is 1.2, the melt index is 25 g / 10 minutes, and the density is 0.94 g / cm 3 , the content of acrylic acid is 9%; the number average molecular weight of low-density polyethylene is 250,000, the molecular weight distribution is 1.2, and the density is 0.918g / cm 3 .

[0026] The preparation process is as follows:

[0027] (1) Carry...

Embodiment 2

[0032] This example is used to illustrate the biodegradable starch resin provided by the present invention and its preparation method.

[0033] The raw materials are as follows: 53 kg of food grade potato starch, 19 kg of glycerin, 8 kg of butanediol, 0.3 kg of stearic acid, 0.6 kg of calcium stearate, 1.8 kg of monoglyceride, 22 kg of ethylene-methyl acrylate copolymer, Low density polyethylene 8 kg. Among them, the water content of cornstarch is 12wt%; the density of monoglyceride is 0.92g / cm 3 , the ester content is 32%; the number-average molecular weight of the ethylene-methyl acrylate copolymer is 180,000, the molecular weight distribution is 1.2, the melt index is 20 g / 10 minutes (190°C, 2.16 kg), and the density is 0.93 g / cm 3 , the content of acrylic acid is 10%; the number-average molecular weight of low-density polyethylene is 100,000, the molecular weight distribution is 1.2, and the density is 0.918g / cm 3 , a melt index of 6 g / 10 minutes (190° C., 2.16 kg).

[...

Embodiment 3

[0040]This example is used to illustrate the biodegradable starch resin provided by the present invention and its preparation method.

[0041] The raw materials are: 57 kg of food grade sweet potato starch, 16 kg of glycerin, 6 kg of butanediol, 0.4 kg of stearic acid, 0.6 kg of calcium stearate, 2.2 kg of monoglyceride, 19 kg of ethylene-ethyl acrylate copolymer, Low-density polyethylene 3 kg.

[0042] Wherein, the water content of sweet potato starch is 14wt%; The density of monoglyceride is 0.916g / cm 3 , the ester content is 30%; the number average molecular weight of ethylene-ethyl acrylate copolymer is 200,000, the molecular weight distribution is 1.2, the melt index is 15 g / 10 minutes, and the density is 0.94 g / cm 3 , the content of acrylic acid is 8%; the number average molecular weight of low-density polyethylene is 300,000, the molecular weight distribution is 1.2, and the density is 0.918g / cm 3 , a melt index of 5 g / 10 minutes (190° C., 2.16 kg).

[0043] The prep...

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Abstract

The invention provides a biodegradable thermoplastic starch resin for a thin-film material, a preparation method thereof and products thereof. The resin comprises the following components in part by weight: 50 to 60 parts of food grade starch, 15 to 20 parts of glycerol, 3 to 10 parts of butanediol, 0.1 to 0.5 part of stearic acid, 0.2 to 0.8 part of calcium stearate, 1.8 to 2.5 parts of monoglyceride, 15 to 25 parts of ethyl-methyl acrylate copolymer and 1 to 10 parts of low-density polyethylene. Compared with the traditional biodegradable thermoplastic starch resin, the biodegradable thermoplastic starch resin provided by the invention has the advantages of good processing performance, high biomass content, high biodegradation rate, very good thermal bonding performance and leakage-proof performance. The biodegradable thermoplastic starch resin can be used for manufacturing bath curtains, sleeves, films, medical bed spreads, surgical pads, disposable gloves, diapers, sanitary towels, table linens or table cloth.

Description

technical field [0001] The present invention relates to a biodegradable thermoplastic starch resin and its preparation method and film products, more specifically to a biodegradable thermoplastic starch resin for film materials with high starch content and high degradation rate, its preparation method and the use of the starch Products made of resin. Background technique [0002] At present, most of the disposable products that people use daily are petroleum-based plastics. They are cheap, but they are all products that are difficult to degrade. Due to the gradual increase in the use of these products in recent years, white pollution has formed, causing Environmental pollution has affected the ecological balance, and more and more degradable plastic products have begun to emerge. However, the current degradable products always have one or another deficiency. At present, it is more common to use petroleum-based plastic polyolefin materials as the carrier to prepare degradabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L23/06C08L23/08C08K5/04C08K5/053C08K5/098
Inventor 彭晓峰常军
Owner NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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