Composite molded article

A technology of composite molding and resin molding, applied in the field of laser welding molded products, to achieve the effects of excellent color tone and thermal stability, high flame retardancy, and excellent laser transmittance

Active Publication Date: 2012-04-25
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resin composition in this document can combine laser light transmission and practically sufficient flame retardancy required for polyester resin compositions, but since it contains a phenol polymer as an essential component, there is a problem that the molded product will be discolored It is dark brown. In addition, the heat deflection temperature is lowered, which impairs the practically sufficient color tone and thermal characteristics required for polyester resin compositions.

Method used

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  • Composite molded article
  • Composite molded article
  • Composite molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～19 and comparative example 1～12

[0175] (1) Preparation of pellets

[0176] According to the ratio shown in Tables 1 to 3, each component [bromine compound (B), antimony oxide (C) and / or polycarbonate resin (D), phosphorus compound (E), crystal nucleating agent (F )] was blended with the polyester-based resin (A) shown in Tables 1 to 3, and uniformly mixed with a V-type blender. Using a 30mmφ twin-screw extruder, melt-mix the obtained mixture with the filler (G) and fluorine-containing resin (H) in the proportions shown in Table 1 at a barrel temperature of 260°C, and cool the strands ejected from the die. Cut to obtain pellets. In addition, the pellets contained 0.3 parts by weight of a phenolic antioxidant (manufactured by Chiba Co., Ltd., "Irganox 1010") and 0.5 parts by weight of a release agent (manufactured by Clariant Co., Ltd., "Wax E").

[0177] (2) Manufacturing and laser welding of molded products

[0178] Using the pellets obtained in (1) above, resin molded product A (length 8 cm x width 1 cm x ...

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Abstract

Disclosed is a laser-transmitting resin molded article which comprises a polyester resin as a base material and has both of a laser-weldable property (a laser-transmitting property) and flame retardancy at high levels. The molded article is formed from a resin composition comprising a polyester resin (A) (e.g., a PBT resin), at least one bromine-containing compound (B) selected from a brominated (meth)acrylate resin, a brominated styrene resin, a brominated polycarbonate resin and a brominated epoxy resin, and an antimony oxide (C) having an average particle diameter of 2 to 10 [mu]m. The molded article has an excellent laser-transmitting property and excellent flame retardancy, and may have a laser beam transmissivity of 20 percent or more as measured at a thickness of 1 mm and a flame retardancy evaluation rating of V-0 as measured in accordance with UL94 standard at a thickness of 0.8 mm. The resin composition may further comprise a filler, a fluorine-containing resin, a polycarbonate resin, a phosphorus compound and / or a crystallization nucleating agent.

Description

technical field [0001] The present invention relates to a molded article for laser welding (laser transmission side) which is formed of a resin composition for laser welding (transmission side part for laser welding) and can be used as a transmission side part for laser light, which has high laser transmittance and excellent flame retardancy. Molded products) and composite molded products using the molded products. Background technique [0002] Polyester-based resins such as polybutylene terephthalate (PBT)-based resins are used in many applications due to their excellent various properties such as heat resistance, chemical resistance, electrical properties, mechanical properties, and moldability. Specific applications include various electrical parts for automobiles (various control units, various sensors, ignition coils, etc.), connectors mounted on automobiles and electrical products, switch parts, relay parts, coil parts, Transformer parts, lamp parts, etc. Many of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00B29C65/16C08J5/00C08K3/22
CPCB29C66/43B29C65/1616B29K2995/0027B29C65/1635B29K2105/0026B29K2063/00B29C66/71B29K2067/00B29K2069/00B29K2025/00B29C66/81267B29C65/1658B29K2909/08B29C65/8207C08L67/00C08L69/00B29C66/1122C08K3/2279C08L25/18B29C65/1677C08L33/16B29C65/8215B29C66/7332C08L63/00B29K2027/12B29K2067/006B29C66/7392B29C66/7394B29C66/836
Inventor 春原淳平川阳一坂田耕一
Owner POLYPLASTICS CO LTD
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