公开(公告)号：US20230041838A1

公开(公告)日：2023-02-09

申请号：US17783326

申请日：2020-12-16

申请人： Polyplastics Co., Ltd.

发明人： Takato Isomura ,  Kazuya Goshima ,  Kouichi Sakata

IPC分类号： B29C65/16

摘要： Problem: To provide a molded article for laser welding which has excellent visible light transmittance and laser transmittance and in which variation in laser transmittance is suppressed, and an agent for suppressing variation in laser transmittance of a molded article for laser welding.
Solution: A molded article for laser welding comprising a polybutylene terephthalate resin composition containing 100 parts by mass of (A) a polybutylene terephthalate resin, (B) a polycarbonate resin in which the melt viscosity at 300° C. and a shear rate of 1000 sec−1 is 0.20 kPa·s or greater, and 1 part by mass or greater and 10 parts by mass or less of (C) an epoxy-based compound, the molded article having a thickness at a welded part of 1.3 mm or greater, and an agent for suppressing variation in laser transmittance of a molded article for laser welding, the agent containing an epoxy-based compound.

公开(公告)号：US20210170696A1

公开(公告)日：2021-06-10

申请号：US16771046

申请日：2018-12-10

申请人： Polyplastics Co., Ltd.

发明人： Kouichi Sakata

IPC分类号： B29C65/16

摘要： A molded article that is used on a laser beam absorbing in laser welding side and that is possible to be marked by being irradiated with a laser beam, the molded article being composed of a resin composition containing 0.1 to 0.4 parts by mass of a carbon black per 100 parts by mass of a thermoplastic aromatic resin, the carbon black having a primary particle diameter of 20 to 40 nm and a DBP oil absorption of 100 cm3/100 g or more.

公开(公告)号：US20220195179A1

公开(公告)日：2022-06-23

申请号：US17599636

申请日：2020-03-24

申请人： Polyplastics Co., Ltd.

发明人： Kouichi Sakata ,  Ryusei Matsuzaki

IPC分类号： C08L67/02 ,  C08K5/06 ,  C08J3/205

摘要： A method is disclosed for improving alkaline solution resistance of a thermoplastic resin by blending an aromatic polyvalent carboxylic acid ester into the thermoplastic resin. Preferably, 1 to 15 parts by mass of the aromatic polyvalent carboxylic acid ester are blended with respect to 100 parts by mass of the thermoplastic resin. Additionally, an aromatic polyvalent carboxylic acid ester can be used for improving alkaline solution resistance of a thermoplastic resin. An alkaline solution resistance improving agent is also disclosed for a thermoplastic resin, the alkaline solution resistance improving agent containing an aromatic polyvalent carboxylic acid ester.