Mitsui Chemicals, Inc.

Takashi Hama

Nobuhiro Takizawa

Hideto Ogasawara

Akinori Amano

Hiroki Ebata

Yasuo Kurosaki

Kuniaki Kawabe

Hirotaka Kanaya

Fumio Kageyama

Toyoaki Sasaki

Kan Komiya

Kaoru Ohshimizu

Takayuki Okuno

Shintaro Mitsunaga

Kunio Tomita

The present invention addresses the problem of providing a polyester resin composition for reflective materials which gives a reflective material having a high reflectance. The polyester resin composition for reflective materials comprises: a polyester resin (A) comprising an alicyclic dicarboxylic acid ingredient unit (a1) and an aliphatic diol ingredient unit (b1); and a white pigment (B). The amount of the alicyclic dicarboxylic acid ingredient unit (a1) is 50 mol % or more of the amount of all the dicarboxylic acid ingredient units (a) in the polyester resin (A), and the amount of the aliphatic diol ingredient unit (b1) is 50 mol % or more of the amount of all the diol ingredient units (b) in the polyester resin (A). The alicyclic dicarboxylic acid ingredient unit (a1) comprises the cis and trans forms of cis-trans isomers, the proportion of the cis form determined by NMR being 20 mol % or higher.

Polyester resin composition for reflective material, and reflective material comprising same

The purpose of the present invention is to provide a thermoplastic resin composition for a reflective material which has excellent mechanical strength, excellent heat resistance, excellent high reflectance, and excellent moldability, and which makes it possible to obtain a reflective plate with little decline in reflectance caused by heating. A first embodiment of this thermoplastic resin composition for a reflective material includes: a polyester resin (A) that has a melting point or glass transition temperature of 250&#xb0; C. or higher and includes an alicyclic hydrocarbon structure; a thermoplastic resin (B) that has a polyolefin backbone and a functional group; a white pigment (C); and an inorganic filler (D); the thermoplastic resin (B) either including 0.1 to 1.8 wt % of a functional group unit (B1) that further includes a heteroatom, or further including an aromatic hydrocarbon structure (B2), and the limiting viscosity [&#x3b7;] being 0.04 to 1.0 dl/g.

Thermoplastic resin composition for reflective material, reflective plate, and light-emitting diode element

The purpose of the present invention is to provide a thermoplastic resin composition for a reflector plate with which it is possible to obtain a molded article having excellent moldability, high mechanical strength, excellent heat resistance and a high reflectance that is stable over time, and it is possible to obtain a reflector plate with which there is little reduction in reflectance due to heating. The thermoplastic resin composition for a reflector of the invention comprises 30 to 80 weight % of a thermoplastic resin (A) having structural units containing carbonyl groups and a melting point or glass transition temperature of 250&#xb0; C. or higher, 10 to 50 weight % of an inorganic filler (B) containing an inorganic filler (B-1) that comprises a carbonyl structure and has an aspect ratio of 10 to 100, and 5 to 50 weight % of a white pigment (C).

Thermoplastic resin composition for reflector, reflector plate, and light-emitting diode element

It is an object of the present invention to provide a hollow bottle made of polyester, which has excellent heat resistance and is not likely to undergo deformation or change in capacity even if a liquid of high temperature is filled therein. The present invention relates to a hollow bottle formed by blow molding polyester, which has a thickness in the range of 200 to 400 &#x3bc;m, and satisfies that &#x394;d=d&#x2212;dis not less than &#x2212;7 kg/mand more than 7 kg/m, with d[kg/m] being a density of a part ranging from an outer surface up to 50 &#x3bc;m inward, and d[kg/m] being a density of a part of the body portion ranging from an inner surface up to 50 &#x3bc;m inward. The polyester is preferably polyethylene terephthalate, and it is preferable that d=1370 to 1375 kg/m, while d=1373 to 1378 kg/m.

Polyester resin bottle and method of producing the same

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Chiba, Japan

Takashi Hama