Wheat straw filled and modified PLA full-degradable plastic and preparation method thereof

A wheat straw, fully degradable technology, applied in the field of plastics, can solve the problems of poor heat resistance and water resistance
CN112920567APending Publication Date: 2021-06-08柳州塑友科技有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
柳州塑友科技有限公司
Publication Date
2021-06-08

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Abstract

The invention discloses wheat straw filled and modified PLA full-degradable plastic. The full-degradable plastic is prepared from the following ingredients in parts by weight: 20 to 30 parts of poly (butylene succinate), 15 to 25 parts of polylactic acid, 5 to 10 parts of poly (butylene adipate / terephthalate), 15 to 30 parts of talcum powder, 20 to 30 parts of wheat straw powder and 0.5 to 5 parts of auxiliary agents. The auxiliary agent comprises the following components in parts by weight: 2-5 parts of porous rare earth oxide, 1-3 parts of an epoxy compound, 1-3 parts of a lubricant and 1-3 parts of a plasticizer. The preparation method comprises the following steps: mixing the polylactic acid and the porous rare earth oxide to obtain the modified polylactic acid, mixing the modified polylactic acid with the poly (butylene succinate), the poly (butylene adipate / terephthalate) and the epoxy compound, stirring and mixing an obtained mixture with the talcum powder, the wheat straw powder, the lubricant and the plasticizer, finally performing extrusion granulation through a twin-screw extruder, and performing drying to obtain the product plastic. The invention solves the problems of poor heat resistance and water resistance in existing polylactic acid full-degradable plastic.
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Description

technical field

[0001] The invention belongs to the technical field of plastics, and in particular relates to a wheat straw-filled modified PLA fully degradable plastic and a preparation method thereof. Background technique

[0002] In recent years, due to the increasingly prominent environmental problems and the gradual reduction of traditional petroleum resources, it is imminent to find new degradable materials. Therefore, biodegradable polymers have gradually become the object of attention. Polylactic acid (PLA) is a polyester polymer obtained by polymerizing lactic acid as the main raw material. It is widely used because of its pollution-free and biodegradable production process. In food packaging, medical materials, construction, agriculture, papermaking and many other fields, it can be made into film, sheet and fiber. However, due to the inherent brittleness and poor impact resistance of PLA, its wide application is greatly limited. How to modify polylactic acid to p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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