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Composite material of poly lactic acid / natural faric, and production method

A natural fiber and composite material technology, applied in natural fiber reinforced modified polylactic acid composite materials and its production field, can solve the problems of high mechanical equipment requirements, low production efficiency, and difficulty in industrialization, and achieve high production efficiency and good molding processing Sexuality and simple operation

Inactive Publication Date: 2007-07-25
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above inventions all have the disadvantages of complex operation, high requirements for mechanical equipment, low production efficiency, and difficult industrialization.

Method used

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  • Composite material of poly lactic acid / natural faric, and production method
  • Composite material of poly lactic acid / natural faric, and production method
  • Composite material of poly lactic acid / natural faric, and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Accurately weigh 70 parts of polylactic acid and 0.3 part of antioxidant tetrakis{β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid}pentaerythritol and mix them uniformly and then add them into the extruder from the main hopper. At the same time, 30 parts of short ramie fibers are fed into an extruder through a side feeding device to carry out extrusion granulation, and the product is obtained after drying. Its mechanical properties are listed in Table 1. # As shown, for comparison, 0 in Table 1 # The mechanical properties of pure polylactic acid are listed.

[0016] The crystallization properties of the composite material were measured by differential scanning calorimetry (DSC). The first cooling and second heating curves were taken, and the crystallization rate was characterized by the peak value (crystallization temperature) and half-peak width of the crystallization peak. The higher the temperature, the narrower the half-width, the greater the crystallization ra...

Embodiment 2

[0020] Cotton short fibers are surface treated with coupling agent γ-glycidyl etheroxypropyl trimethoxysilane, the specific method is as follows: prepare a 1wt% coupling agent aqueous solution, add a certain amount of concentrated hydrochloric acid dropwise to adjust the pH of the solution to 3-4, and The cotton fiber is soaked in the solution, and after soaking for two hours, it is taken out and placed in a blast oven for drying at 80°C.

[0021] Accurately weigh 90 parts of polylactic acid and 0.3 parts of antioxidant tetrakis{β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid}pentaerythritol and mix them uniformly and then add them to the extruder from the main hopper. Simultaneously, 10 parts of processed cotton staple fibers are added into the extruder through a side feeding device to extrude and granulate, and the product is obtained after drying. The rest are the same as in Example 1, and its mechanical properties are shown in Table 1. 2 # As shown, the crystallization...

Embodiment 3

[0025] The ramie short fiber was surface-treated with coupling agent γ-glycidyl etheroxypropyl trimethoxysilane, and the soaking time was 0.5 hour. Concrete processing method is with the processing of cotton fiber in embodiment 2.

[0026] Accurately weigh 80 parts of polylactic acid and 0.2 part of antioxidant tetrakis{β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid}pentaerythritol and mix them uniformly and then add them into the extruder from the main hopper. Simultaneously, 20 parts of processed ramie short fibers are added to the extruder through a side feeding device to extrude and granulate. After drying, the product is obtained. All the other are the same as in Example 1, and its mechanical properties are shown in Table 1. # As shown, the crystallization properties are shown in Table 2 3 * shown.

[0027] It can be seen from Table 1 that the mechanical properties of the composite material of the present invention, such as flexural strength, flexural modulus and h...

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Abstract

This invention discloses a poly (lactic acid) / natural fiber composite, which is mainly composed of poly (lactic acid) resin and natural fibers. The production method comprises: performing surface treatment on natural fibers with coupling agent, mixing with poly (lactic acid) resin, antioxidant, nucleating agent and lubricant, melt-extruding, and granulating to obtain the product. The method has such advantages as easy operation and high efficiency. The poly(lactic acid) / natural fiber composite has such advantages as high modulus, good heat resistance, good processability, and good biodegradability, and can be used in the fields of automobile industry, architecture and domestic decoration.

Description

Technical field: [0001] The invention belongs to the field of polymer materials, and in particular relates to a natural fiber reinforced modified polylactic acid composite material and a production method thereof. Background technique: [0002] Polylactic acid (PLA) does not exist in nature. It is an environmentally friendly material prepared from the fermentation product lactic acid of agricultural economic crops (corn, wheat, potato, etc.) as the basic raw material. Polylactic acid has good biodegradability, good biocompatibility and bioabsorbability, and is non-toxic and harmless to the human body. It gradually degrades in the body and in the natural environment, and finally becomes carbon dioxide and water without leaving any Environmental issues. Therefore, polylactic acid is considered to be the most potential and promising degradable polymer material in many fields. However, some mechanical properties of pure polylactic acid such as heat resistance (heat distortion ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08J5/06C08J3/12B29C47/00
CPCC08J2367/04C08J5/045C08J5/06
Inventor 董卫卫赵春贵李俊刘新力
Owner TORAY FIBER RES INST(CHINA) CO LTD
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