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Composite containing polyhydroxybutyrate copolymer and polylactic acid used for foaming material

A technology of polyhydroxybutyrate and its composition, which is applied in the field of polymers, can solve the problems affecting the normal collection and production output of products, high cost, slow crystallization rate, etc., and achieve easy operation and industrialization popularization of production and processing molding methods Simple, yield-efficient results

Inactive Publication Date: 2012-07-04
TIANJIN GREENBIO MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since polyhydroxybutyrate copolymer P (3HB-co-4HB) is usually a semi-crystalline thermoplastic polyester compound with low crystallinity and melting point, the crystallization rate is slow during processing, and it will also adhere to the Together, it affects the normal collection and production output of products, and the cost of this biocopolyester is relatively high at present

Method used

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  • Composite containing polyhydroxybutyrate copolymer and polylactic acid used for foaming material
  • Composite containing polyhydroxybutyrate copolymer and polylactic acid used for foaming material

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preparation example Construction

[0029] The preparation of embodiment foam material

[0030] The foaming agent formula is as follows:

[0031] In parts by mass, and based on the main component polyhydroxybutyrate copolymer P (3HB-co-4HB) (100 parts by mass), the proportions of each component are as follows:

[0032] Polyhydroxybutyrate copolymer P (3HB-co-4HB) 100 parts

[0033] Polylactic acid (PLA) 100-700 parts

[0034] Foaming agent: 0.2~1.5 parts

[0035] Organic and / or inorganic additives 0-60 parts

[0036] Other additives: 0~5 parts

[0037] Processing method: Blend all raw materials, extrude and granulate. Then extrude the foamed sheet, the temperature is controlled at 140°C-180°C, the screw speed is 20-150 rpm, and water-cooled. The foamed sheet is then blistered on the blister machine to form a finished product.

Embodiment 1

[0039] In terms of parts by mass, 100 parts of P (3HB-co-5mol% 4HB), 700 parts of PLA, and 1.5 parts of AC; all raw materials are blended and extruded to granulate; then extruded foam sheets; products.

Embodiment 2

[0041] Select 100 parts of P (3HB-co-95mol% 4HB) in parts by mass, 400 parts of PLA, 1.0 part of AC, and 0.2 part of calcium stearate; blend all raw materials and extrude granulation; then extrude foam sheet Material; then plastic molding into products.

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Abstract

The invention discloses a composite containing polyhydroxybutyrate copolymer and polylactic acid used for the foaming material. The composite contains polyhydroxybutyrate copolymer P (3HB-co-4HB), polylactic acid and foaming agent, has a certain tensile strength, elongation at break and expansion ratio, has thorough biological degradation and can be widely used in the packaging field.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and more specifically, the invention discloses a composition of biodegradable macromolecular polymers used for foaming materials, which can be widely used in packaging products. Background technique [0002] While the plastic industry is convenient for human life, it also leads to the aggravation of environmental pollution. At present, the world produces about 140 million tons of plastics every year, and the waste after use accounts for about 50%-60% of the production. The most serious concentration of environmental pollution in my country is the use of disposable tableware, plastic packaging boxes, bags and films, and medical products. [0003] The disposable products currently used in the market are mainly polyethylene, polypropylene, polypropylene / starch blends and polystyrene foamed products. None of these foamed disposable products can biodegrade into CO 2 and H 2 O purpose. For e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08J9/10C08J9/14C08J9/12
Inventor 李梅吕渭川
Owner TIANJIN GREENBIO MATERIAL CO LTD
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