All bio-decomposable starch-resin, preparation method thereof, film products and resin composition for preparing starch-resin

A biodegradable, starch resin technology, applied in the field of biodegradable starch resin, can solve the problems of insufficient toughness, environmental pollution, insufficient application of blown film, etc., and achieve the effect of low cost of raw materials

Active Publication Date: 2009-03-25
GRACE BIOTECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the starch-mixed plastic composition provided in this case has excellent biodegradability, but according to the content taught in the instruction manual of the case, the toughness of the starch-mixed plastic composition made by it is not enough, so it can only be made int...

Method used

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  • All bio-decomposable starch-resin, preparation method thereof, film products and resin composition for preparing starch-resin
  • All bio-decomposable starch-resin, preparation method thereof, film products and resin composition for preparing starch-resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The total weight of the resin composition was 100 kg, which contained 44.8% by weight of tapioca starch, 38.8% by weight of PBAT ester grains, 11.9% by weight of glycerin, 4% by weight of water, 0.5% by weight of lecithin, and 0.5% by weight of starch hydrolysis enzyme solution.

[0044] Firstly put the tapioca starch in the first waiting barrel, put the PBAT ester grains in the second waiting barrel, and put the liquid raw materials such as glycerin, water, lecithin and starch hydrolytic enzyme in the third waiting barrel and then put the cassava starch in the first bucket for feeding into the mixing bucket, then add the PBAT ester grains in the second bucket for feeding into the mixing bucket, then put the liquid starch in the third bucket for feeding The raw materials are evenly sprayed into the mixing barrel, and all the raw materials are mixed evenly and then sent to the feeding barrel of the twin-screw extruder, and then mixed by the twin-screw extruder to obtain a...

Embodiment 2～8

[0046] The implementation procedure of Examples 2-8 is the same as that of Example 1, except that the component ratios of the resin compositions of Examples 2-8 are shown in Table 1 below.

Embodiment 9～16

[0048] The implementation steps of Examples 9 to 16 are except that the screw speed of the twin-screw extruder is set at 250rpm, and the temperature settings of the eleven zones from the feed end to the extrusion end of the screw are sequentially set at 30°C, 110°C, and 120°C. °C, 125 °C, 125 °C, 125 °C, 130 °C, 135 °C, 135 °C, 125 °C, and 90 °C, the rest are approximately the same as in Example 1. In addition, the component ratios of the resin compositions of Examples 9-16 are shown in Table 1 below, wherein Example 8 additionally added 0.3% by weight of titanium dioxide, and the titanium dioxide was first placed in the first waiting tank and mixed with tapioca starch.

[0049] blown film

[0050] Get respectively about 10 kilograms of resin pellets of the starch resins obtained in the aforementioned embodiments 1 to 16, and utilize an extrusion type blown film machine (Blown Film Extruder) to make films of different thicknesses. The films made by the resin pellets of each ...

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Abstract

The invention discloses a completely biodegradable starch resin which consists of starch of biodegradable modification and completely biodegradable polyester. A starch initiator is hydrolyzed by a starch hydrolytic enzyme to form the starch of biodegradable modification. The completely biodegradable polyester is aliphatic polyester or aliphatic-aromatic copolyester with complete biodegradation. The completely biodegradable starch resin particles of the invention can be prepared into film products which conform to European Compostable Standard (EN13432 of September 2000) and United States Compostable Standard (ASTM norm D 6400-04).

Description

technical field [0001] The present invention relates to a biodegradable starch resin, in particular to a fully biodegradable starch resin formed by biochemically modifying starch and its production method, as well as a resin composition used to prepare the starch resin and the use of the starch Film products made of resin. Background technique [0002] The plastic materials that are widely used in daily necessities usually cannot be decomposed naturally, and are prone to produce toxic substances after burning, which makes plastic waste a serious environmental problem, especially the convenience of plastic bags being thrown away after use, which has caused major plastic wastes. one of the sources of pollution. [0003] In order to solve the increasingly serious environmental protection problems, biodegradable plastic materials have been developed one after another. Among them, the biodegradable plastic formed by using starch, because the starch raw material is easy to obtai...

Claims

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Application Information

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IPC IPC(8): C08L3/04C08L67/00C08K3/34B29C47/40C08J5/18
CPCC08K3/36C08K3/22C08K3/26C08L3/02C08K5/0016C08L67/02C08K5/053
Inventor 陈志成王金煌陈钦伟王云平
Owner GRACE BIOTECH CORP
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