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Thermoplastic resin molding and manufacturing method therefor

A technology of thermoplastic resin and manufacturing method, which is applied in the field of manufacturing thermoplastic resin moldings, can solve problems such as weight and specific gravity, and achieve the effects of good efficiency, rust suppression, and excellent appearance quality

Active Publication Date: 2014-08-13
TOYOTA BOSHOKU KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, existing thermoplastic resin molded products that combine resin reinforcement materials such as glass fiber and talc have high specific gravity and weight, so further weight reduction has been demanded.

Method used

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  • Thermoplastic resin molding and manufacturing method therefor
  • Thermoplastic resin molding and manufacturing method therefor
  • Thermoplastic resin molding and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0088] Hereinafter, the present invention will be described more specifically by way of examples.

[0089] [1] Production of thermoplastic resin moldings (Examples 1 to 7 and Comparative Examples 1 to 3)

[0090]

[0091] (1-1) Preparation of thermoplastic resin composition

[0092] Kenaf fibers produced in Indonesia or Vietnam are cut with a grinder "RC250" (mesh φ2 mm) manufactured by YOSHIKOH CO., LTD., and the cut kenaf fibers are crushed with a granulator "KP280" (mold) manufactured by KIKUKAWA ENTERPRISE, INC. Diameter φ6.2mm, length 10mm), input kenaf pulverized fiber under feeder frequency 40Hz, make kenaf granule under roller frequency 40Hz.

[0093] After that, the obtained kenaf pellets (fiber length 2 mm), polypropylene (PP) ["VM970X" manufactured by Sun Allomer Ltd.], acid-modified PP ("MODIC P908" manufactured by Mitsubishi Chemical Corporation.), black masterbatch ( Coloring agent) [RHOMBIC Corporation. "RMB920"] was put into a mixing and melting device with...

Embodiment 2～5

[0097] Except having changed the compounding ratio of kenaf (plant fiber) and PP (thermoplastic resin) as shown in Table 1, it carried out similarly to Example 1, and produced the test piece (110x10x4mm) of Examples 2-5.

Embodiment 6

[0099] The kenaf PP pellets produced in the same manner as in Example 1 were dried at 110° C. for 4 hours using a resin dryer, and the moisture content of the material was controlled at 0.4%. Injection molding was performed at a molding temperature of 190° C. and a mold temperature of 40° C. to produce a test piece (110×10×2 mm) of Example 6 having a thickness different from that of Example 1.

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Abstract

A thermoplastic resin molding, which is lightweight and has reduced environmental impact is provided. A thermoplastic resin molding manufacturing method capable of efficiently manufacturing the thermoplastic resin molding and of satisfactorily limiting the occurrence of rust in the injection molding die is also provided. The thermoplastic resin molding may contain a thermoplastic resin and a plant fiber as the main components, and the ratio of thermoplastic resin to plant fiber content may be 7:3 to 4:6. The molding may be obtained by injection molding of a thermoplastic resin composition containing a thermoplastic resin and a plant fiber and having a water content of 0.4% or less.

Description

technical field [0001] The present invention relates to a thermoplastic resin molded article and a method for producing the same. More specifically, it relates to a lightweight thermoplastic resin molded article with reduced environmental impact, and a method for producing a thermoplastic resin molded article capable of efficiently producing the thermoplastic resin molded article and sufficiently suppressing rusting of an injection mold. Background technique [0002] Conventionally, injection molded articles made of thermoplastic resins have been used as structural materials in the automotive field (for example, air filter housings, etc.) (see, for example, Patent Documents 1 and 2). Sufficient mechanical strength is required for such structural materials, and in order to increase the strength of molded products, resin reinforcement materials such as glass fiber and talc, which have a large specific gravity, are usually used in combination with thermoplastic resins as raw ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00C08L101/00B29K101/12B29K105/06
CPCC08J5/045C08L101/00C08L23/12B29K2911/10B29C33/70B29C45/0013C08J2323/12B29C45/0005C08J2300/22Y10T428/24479
Inventor 羽柴正典玉树幸祐丸山和重藤井薰白崎智大
Owner TOYOTA BOSHOKU KK
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