Laser-weldable resin composition and molded product
AssigneeWinTech Polymer Ltd.
InventorYasumitsu Miyamoto
Life of this patent
Estimating the term…
Abstract
A laser-weldable polybutylene terephthalate-series resin composition having a high laser weldability is provided. The resin composition comprises (A) a polybutylene terephthalate-series resin and (B) a fatty acid-series compound (e.g., a C12-36 fatty acid ester, and a metal salt of a C12-36 fatty acid), and if necessary (C) a cyclic polyester oligomer (e.g., a cyclic polyalkylene terephthalate oligomer). In the resin composition, the proportion of the fatty acid-series compound (B) may be usually about 0.01 to 1.0 part by weight relative to 100 parts by weight of the polybutylene terephthalate-series resin (A).
Claims5
A composite molded product comprising a laser-transmittable resin molded product and a laser-absorbable resin molded product, wherein the laser-transmittable and laser-absorbable resin molded products are bonded together by laser welding at a laser beam-transmitting site, and wherein
- the laser-transmittable resin molded product is formed from a resin composition consisting of (A) a polybutylene terephthalate resin, and (B) a fatty acid compound, wherein
- the fatty acid compound (B) comprises at least one member selected from the group consisting of a C12-36 fatty acid ester with a C3-12 aliphatic polyol having 3 or more hydroxyl groups and a metal salt of a C12-36 fatty acid,
- the proportion of the fatty acid compound (B) is 0.04 to 0.4 part by weight relative to 100 parts by weight of the polybutylene terephthalate resin (A), and
- the laser beam-transmitting site in the molded product has a thickness of 0.1 to 5 mm.
A composite molded product comprising a laser-transmittable resin molded product and a laser-absorbable resin molded product, wherein the laser-transmittable and laser-absorbable resin molded products are bonded together by laser welding at a laser beam-transmitting site, and wherein
- the laser-transmittable resin molded product is formed from a resin composition consisting of (A) a polybutylene terephthalate resin, (B) a fatty acid compound and (C) a cyclic polyester oligomer,
- the fatty acid compound (B) comprises at least one member selected from the group consisting of a C12-36 fatty acid ester with a C3-12 aliphatic polyol having 3 or more hydroxyl groups and a metal salt of a C12-36 fatty acid,
- the proportion of the fatty acid compound (B) is 0.04 to 0.4 part by weight relative to 100 parts by weight of the polybutylene terephthalate resin (A),
- the proportion of the cyclic polyester oligomer (C) is 0.01 to 20 parts by weight relative to 100 parts by weight of the polybutylene terephthalate resin (A), and
- the laser beam-transmitting site in the molded product has a thickness of 0.1 to 5 mM.
Dependencies are inferred from the claim text.