Mobile terminal part

A technology of portable terminals and components, which is applied in the direction of casings/cabinets/drawer parts, electrical components, branch equipment, etc., can solve the problems of large dents, large warping deformation, and high impact of molded products. Simplified processing, strong rigidity and impact, and reduced manufacturing costs

Inactive Publication Date: 2010-12-08
WIN TECH POLYMER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common polybutylene terephthalate resins have the following problems: large shrinkage during curing during molding processes such as injection molding, large amount of sinking of molded products; warping due to shrinkage anisotropy Big deformation
It is considered difficult to apply to molded products such as portable terminal parts, which require high strength, high rigidity, high impact, dents and warpage of molded products, etc. at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8、 comparative example 1～7

[0042] Each resin composition is dry-mixed according to the mixing ratio shown in Table 1, using a A twin-screw extruder (manufactured by The Japan Steel Works, LTD.) with the same screw was melt-mixed at a cylinder set temperature of 250° C., and then pelletized to produce test pieces and perform various evaluations. The results are shown in Table 1.

[0043] In addition, the details of the components used and the measuring method of physical property evaluation are as follows.

[0044] (1) Ingredients used

[0045] (A) Ingredients

[0046] (A-1) Isophthalic acid-modified polybutylene terephthalate (intrinsic viscosity IV=0.65dL / g)

[0047] In the reaction of terephthalic acid and 1,4-butanediol, a modified polyterephthalic acid obtained by using 12.5 mol% of dimethylisophthalic acid as a copolymerization component instead of a part (12.5 mol%) of terephthalic acid Butylene glycol dicarboxylate

[0048] (A-2) Polybutylene terephthalate (intrinsic viscosity IV=0.69 dL / g,...

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Abstract

Provided is a mobile terminal part formed from a polybutylene-telephtalate resin composition having excellent properties such as a mechanical strength and a shock resistance and causing little shrinkage or warp deformation. More specifically, the polybutylene-telephtalate resin composition is prepared by mixing [A] 100 % by weight of denaturated polyethylene-telephtalate resin and [B] 40 to 140 %by weight of glass fiber having a flat cross sectional shape.

Description

technical field [0001] The present invention relates to portable terminal parts molded from a specific polybutylene terephthalate resin composition. More specifically, the present invention relates to a portable terminal component obtained using a polybutylene terephthalate resin composition excellent in physical properties such as mechanical strength and impact strength, and moldability such as low sag and low warpage. Background technique [0002] Various OA equipment, home appliances, telephones and other electrical or electronic equipment have a demand for miniaturization, especially portable electronic equipment products have a strong demand for small size and light weight. In the past, from the viewpoint of protecting electronic equipment, metal materials such as aluminum and magnesium, and ceramic materials have been used as casings (housings) for electronic equipment for housing various portable terminals, and reinforcing plates for maintaining the strength of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/00C08K7/14H05K5/02
CPCC08J5/043H05K5/02C08J2367/02H04M1/0202C08K3/013C08K7/14C08L67/02C08K2201/006
Inventor 若塚圣天野博之
Owner WIN TECH POLYMER LTD
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