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Molded article for laser welding, and inhibitor for fixture of laser transmission in

A molding product, laser melting technology, applied in the field of laser transmittance deviation inhibitor, can solve the problems of low chemical resistance, low heat resistance, limited use, etc., achieve excellent laser transmittance, excellent visible light transmittance, The effect of suppressing bias

Pending Publication Date: 2022-07-29
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, resins such as PMMA and polystyrene have low heat resistance and low chemical resistance to organic solvents and the like, so their applications are limited.
On the other hand, although PBT is excellent in heat resistance and chemical resistance, it is insufficient in transparency because it is a crystalline resin.

Method used

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  • Molded article for laser welding, and inhibitor for fixture of laser transmission in

Examples

Experimental program
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preparation example Construction

[0029] In the preparation of polybutylene terephthalate resin, when an aromatic dicarboxylic acid other than terephthalic acid or an ester-forming derivative thereof is used as a comonomer component, for example, isophthalic acid can be used. , phthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4'-dicarboxydiphenyl ether, etc. C 8-14 aromatic dicarboxylic acids; succinic acid, adipic acid, azelaic acid, sebacic acid, etc. C 4-16 alkane dicarboxylic acid; cyclohexane dicarboxylic acid, etc. C 5-10 cycloalkane dicarboxylic acids; ester-forming derivatives (C 1-6 alkyl ester derivatives, acid halides, etc.). These dicarboxylic acid components can be used individually or in combination of 2 or more types.

[0030] Among these dicarboxylic acid components, C such as isophthalic acid is more preferable 8-12 Aromatic dicarboxylic acids, and adipic acid, azelaic acid, sebacic acid, etc. C 6-12 of alkane dicarboxylic acids.

[0031] In the preparation of polybutylene terephthalat...

Embodiment 1、 comparative example 1～9

[0097] With respect to 100 parts by mass of (A) polybutylene terephthalate resin, after mixing each component in the ratio shown in Table 1, using TEX30 manufactured by Nippon Steel Works, the barrel temperature was 260°C, and the discharge amount was 15kg / It melt-kneaded and extruded at the screw rotation speed of 130 rpm, and obtained the pellet which consists of a polybutylene terephthalate resin composition. Then, a test piece of 80 mm×80 mm×1 mmt or 1.5 mmt was produced from the pellets by injection molding using an injection molding machine S-2000i100B manufactured by FANUC Corporation, and the light transmittance (%) at a wavelength of 980 nm and the wavelengths of 400 nm, 500 nm, and 600 nm were measured. , Measurement of light transmittance (%) of various test pieces at 700 nm. The results are shown in Table 1.

[0098] [Table 1]

[0099]

[0100] As shown in Table 1, when the thickness of the product was increased, the effect of suppressing the variation in tra...

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Abstract

[Problem] The present invention addresses the problem of providing: a molded article for laser welding, which has excellent visible light transmittance and laser light transmittance and is capable of suppressing variations in laser light transmittance; and a variation suppressing agent for the laser light transmittance of the molded article for laser welding. [Solution] The problem can be solved by means of a molded article for laser welding, and an inhibitor for the variation in laser light transmittance of a molded article for laser welding, said molded article containing an epoxy compound. The molded article for laser welding is formed from a polybutylene terephthalate resin composition containing (A) 100 parts by mass of a polybutylene terephthalate resin, (B) a polycarbonate resin having a melt viscosity of 0.20 kPa * s or more at 300 DEG C at a shear rate of 1000 sec-1, and (C) 1-10 parts by mass of an epoxy compound. The thickness of the welded part of the molded article is 1.3 mm or more.

Description

technical field [0001] The present invention relates to a molded article for laser welding, which is excellent in visible light transmittance and laser transmittance, and can suppress variations in laser transmittance, and a suppressor for variation in laser transmittance of the molded article for laser welding. Background technique [0002] Heat resistance, chemical resistance, electrical properties, mechanical properties, and molding process of polyalkylene terephthalate resins such as polybutylene terephthalate (hereinafter, also referred to as "PBT") resins Since it is excellent in various properties such as properties, it is used in various applications. [0003] Specific applications include various automotive electrical components (various control units, various sensors, ignition coils, etc.), connectors, switch components, relay components, coil components, and the like. To make these parts, a plurality of molded parts are joined by joining methods such as adhesives...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L69/00C08L63/00
CPCC08L67/02B29C65/1635B29C66/71B29C66/73121B29C66/7352B29C65/1677B29C66/73921B29C65/1616B29C66/73365C08L63/00C08L69/00C08K3/32C08K5/103C08K7/14B29K2067/006B29K2069/00B29K2063/00B29K2105/0094B29K2995/0026B29K2995/0097
Inventor 矶村孝人五岛一也坂田耕一
Owner POLYPLASTICS CO LTD
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