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High-strength biodegradable thermoplastic starch resin, and preparation method and use thereof

A thermoplastic starch and biodegradation technology, applied in the field of degradable resin, can solve the problems of unavailability, poor mechanical properties and poor transparency of starch degradable resin products, and achieve the effect of reducing biomass content, good strength and good transparency

Active Publication Date: 2013-04-17
南京艾道博环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of the starch-degradable resin products processed by this method are not good, and when blown into a film, a thinner film cannot be obtained, and the transparency is not good.

Method used

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  • High-strength biodegradable thermoplastic starch resin, and preparation method and use thereof
  • High-strength biodegradable thermoplastic starch resin, and preparation method and use thereof
  • High-strength biodegradable thermoplastic starch resin, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Described high-strength biodegradable thermoplastic starch resin, component is as follows by weight:

[0066] Food grade cornstarch 20Kg

[0067] Sorbitol 10

[0068] Diethylene glycol 5

[0069] Stearic acid 0.2

[0070] Calcium stearate 0.4

[0071] monoglyceride 1

[0072] Ethylene acrylic acid copolymer (EAA) 8

[0073] Ethylene-vinyl acetate copolymer (EVA) 4

[0074] Linear Low Density Polyethylene (LLDPE) 30

[0075] Very Low Density Low Polyethylene (VLLDPE) 15

[0076] High Density Polyethylene (HDPE) 12

[0077] Among them, the fineness of food-grade starch is 100 mesh, the water content is 12-14%wt; the monoglyceride density: 0.916g / cm3; the ester content> 30%; the melt index of the EAA is 6-15g / 10min, and : 0.93g / cm 3 , the melt index of the EVA is 2g / 10min, density: 0.94g / cm 3 , Food-grade starch is any one of corn starch, wheat starch, tapioca starch, sweet potato starch, and potato starch. The number average molecular weight of the HDPE is 300...

Embodiment 2-6

[0088] According to the formula in Table 2, the high-strength biodegradable thermoplastic starch resins of the present invention were prepared using the same method as in Example 1, which were respectively marked as A2-A6. The detection performance of the produced resin is shown in Table 3.

[0089] Table 2 The present invention and the formula of comparative example

[0090]

[0091]

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Abstract

The invention discloses a high-strength biodegradable thermoplastic starch resin, which comprises the following components in part by weight: 15 to 24 parts of food-grade starch, 8 to 12 parts of sorbitol, 3 to 7 parts of diglycol, 0.1 to 0.5 part of stearic acid, 0.2 to 0.8 part of calcium stearate, 1.5 to 2.5 part of monoglyceride, 5 to 10 parts of ethylene acrylate copolymer, 2 to 7 parts of ethylene vinyl acetate copolymer, 25 to 35 parts of linear low density polyethylene, 10 to 20 parts of ultra low density polyethylene and 11 to 13 parts of high density polyethylene. The high-strength biodegradable thermoplastic starch resin disclosed by the invention has high tensile strength, high elongation at break, high tearing strength, high thermal sealing strength and a biodegrading rate ofover 40 percent. The resin is mainly used for producing various high-strength films and is particularly suitable for producing industrial packaging films, bags, commercial gift bags and trash bags. The resin has good handfeel, desirable thermal sealing effect, high colorizing rate and bright and natural printing color, and is antistatic and particularly suitable for electronic package.

Description

technical field [0001] The invention relates to a degradable resin, in particular to a high-strength biodegradable thermoplastic starch resin. Background technique [0002] The development of modern industry, especially the rapid development of petrochemical industry, provides excellent performance and cheap synthetic resin and plastic products for industrial and agricultural production and people's daily necessities, which promotes the development of industrial and agricultural production, but also brings unavoidable harm to the environment Pollution reversed. In recent years, countries around the world have legislated one after another to restrict the use of plastic films and foamed plastics. At the same time, they are also vigorously developing and researching biodegradable resins and plastic products. [0003] EP 0409789A2 discloses a kind of resin composition, and this composition is starch, polyethylene, ethylene-vinyl acetate solubilizer, plasticizer etc. under the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L23/08C08L23/06C08K5/053C08K5/06C08K5/098C08K5/103
Inventor 彭晓峰常军
Owner 南京艾道博环保科技有限公司