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Injection molding grade degradable polylactic acid wood plastic micro-foaming composite material and preparation method thereof

A technology of polylactic acid wood and composite materials, applied in the field of wood-plastic materials, can solve the problems of low melt strength of polylactic acid, poor compatibility of wood powder and polylactic acid, affecting the performance of polylactic acid, etc., and achieve flexible product design and uniform distribution. , the effect of improving dispersion

Inactive Publication Date: 2018-05-04
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of poor compatibility between wood powder and polylactic acid, which makes it difficult to disperse uniformly in the matrix; the melt strength of polylactic acid is low, and it is difficult for the melt to effectively wrap gas during the foaming process, causing defects such as parallel bubbles and string bubbles, which seriously affect polylactic acid. performance

Method used

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  • Injection molding grade degradable polylactic acid wood plastic micro-foaming composite material and preparation method thereof
  • Injection molding grade degradable polylactic acid wood plastic micro-foaming composite material and preparation method thereof
  • Injection molding grade degradable polylactic acid wood plastic micro-foaming composite material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0035] Concrete preparation method comprises the following steps:

[0036] (1) First bake the poplar wood powder at 120-150°C for 5-8 hours to ensure that the water content of the wood powder is controlled below 0.8%. Weigh 69 parts of the dried wood powder, 30 parts of toluene diisocyanate and 1 part of the catalyst into the Add an appropriate amount of zirconium balls into a PTFE ball mill tank, and mill in a planetary ball mill for 10 minutes, wherein the revolution is 60-100r / min, and the rotation is 100-200r / min. After the reaction, the graft is extracted with acetone for 48 hours to constant weight , to obtain modified poplar wood powder.

[0037] (2) 73 parts of polylactic acid, 2 parts of maleic anhydride grafted polyethylene, 5 parts of talcum powder, 0.1 part of antioxidant 1010, 0.1 part of oxygen agent 168, and 0.5 part of polyethylene wax were mixed in a high-speed mixer for 10 minutes, and put into In the main feed of the co-rotating twin-screw extruder, weigh 2...

Embodiment 2

[0040] The injection-grade polypropylene wood-plastic micro-foaming composite material in this embodiment is composed of the following raw materials according to weight percentage:

[0041] Polylactic acid wood plastic composite material 97%

[0042] Sodium bicarbonate is a chemical blowing agent wrapped in LDPE carrier 3%

[0043] The polylactic acid wood-plastic composite material described therein consists of the following raw materials by weight:

[0044]

[0045]

[0046] Concrete preparation method comprises the following steps:

[0047] (1) First bake the birch powder at 120-150°C for 5-8 hours to ensure that the water content of the wood powder is controlled below 0.8%, weigh 49 parts of the dried wood powder, 49 parts of diphenylmethane diisocyanate, and 2 parts of the catalyst. Put it into a polytetrafluoroethylene ball mill tank, add an appropriate amount of zirconium balls, and mill it in a planetary ball mill for 10 minutes, wherein the revolution is 60-100r...

Embodiment 3

[0051] The injection-grade polypropylene wood-plastic micro-foaming composite material in this embodiment is composed of the following raw materials according to weight percentage:

[0052] Polylactic acid wood plastic composite material 97%

[0053] Sodium bicarbonate is a chemical blowing agent wrapped in LDPE carrier 3%

[0054] The polylactic acid wood-plastic composite material described therein consists of the following raw materials by weight:

[0055]

[0056]

[0057] Concrete preparation method comprises the following steps:

[0058] (1) First bake poplar wood powder at 120-150°C for 5-8 hours to ensure that the water content of the wood powder is controlled below 0.8%, weigh 40 parts of dried wood powder, 57 parts of diphenylmethane diisocyanate, and 3 parts of catalyst Put it into a polytetrafluoroethylene ball mill jar, add an appropriate amount of zirconium balls, and mill it in a planetary ball mill for 10 minutes, wherein the revolution is 60-100r / min, ...

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Abstract

The invention provides an injection molding grade degradable polylactic acid wood plastic micro-foaming composite material and a preparation method thereof. A polylactic acid wood plastic composite material and a chemical foaming agent are mixed uniformly according to a certain proportion, and a polylactic acid wood plastic micro-foaming composite material product is prepared by an injection molding micro-foaming technology under the condition of secondary mold opening, wherein the polylactic acid wood plastic composite material is prepared from 46 to 73 parts of polylactic acid, 20 to 40 parts of modified wood powder, 2 to 4 parts of a compatibilizer, 5 to 10 parts of an inorganic filler, 0.2 to 0.4 part of an antioxidant, 0.5 to 1 part of a lubricating agent and 0 to 2 parts of other aids. The polylactic acid wood plastic micro-foaming composite material provided by the invention has the characteristics of low density, capability of being degraded completely, high mechanical strength, low cost and the like, is an excellent environment-friendly material and can be widely applied to products such as floors, guard bars, furniture and automotive interior decoration.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic materials, and in particular relates to an injection-grade degradable polylactic acid wood-plastic micro-foaming composite material and a preparation method thereof. technical background [0002] Wood-plastic composite material is a new type of composite material that has been booming at home and abroad in recent years. It is mainly composed of thermoplastic materials, wood powder, bamboo powder, straw powder, plant seed shells, and natural hemp. After high-temperature extrusion, Injection, pressing and other methods are used to process new composite materials, which have the characteristics of durability, beauty, low cost, recyclability, high mechanical strength, good dimensional stability, and long service life. Taking into account the dual characteristics of wood and plastic, they have been widely used in Outdoor flooring, decorative hanging panels, wood-plastic panels, balcony guardrails,...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08L51/06C08L23/08C08J9/08
CPCC08J9/08C08J2203/02C08J2205/044C08J2367/04C08J2423/08C08J2451/06C08J2497/02
Inventor 石阳阳周海夏洋李飞李荣群
Owner ORINKO NEW MATERIAL CO LTD
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