The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2001
Filed:
Sep. 30, 1999
Takeshi Kanamori, Ootsu, JP;
Hiroshi Urayama, Kyoto, JP;
Kyohei Takakuwa, Tsuchiura, JP;
Makoto Nakamura, Tsukuba, JP;
Yasuo Teraya, Kobe, JP;
Sakae Shimotsuma, Atsugi, JP;
Other;
Abstract
The present invention provides a resin composition comprising polylactic acid and aliphatic polyester carbonate, which has practically adequate heat-resistance temperature, moldability, thermostability, solvent resistance and high mechanical strength, as well as a molded article thereof. In the resin composition, the Vicat softening point is 60° C. or more, the tensile modulus of elasticity is 0.9 GPa or more, the modulus in flexure is 0.6 GPa or more, and the mixing ratio of polylactic acid (A) and aliphatic polyester carbonate (B), in terms of the ratio of (A)/(B) by weight, is 95/5 to 5/95. Further, the present invention provides a biodegradable injection-molded article having improvements in mechanical characteristics and impact resistance and superior disposal properties, particularly having strength enough to make it usable as a headgear material for use in helmets. The biodegradable injection-molded article is excellent in impact resistance, comprising mainly polylactic acid (A) and aliphatic polyester (E) and/or aliphatic polyester carbonate (B). This injection-molded article has a flexural strength of 30 MPa or more and an Izod impact strength of 3 kJ/m,or more, and it is used as helmet headgear.