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:
Aug. 10, 2004
Filed:
Jan. 23, 2003
Tadahiro Kannari, Ichihara, JP;
Minoru Sugawara, Ichihara, JP;
Idemitsu Petrochemical Co., Ltd., Tokyo, JP;
Abstract
Provided are scratch-resistant blow moldings of crystalline resin having good surface gloss of at least 80% and high surface hardness of at least HB. A crystalline resin melt parison is blown in a blow mold into a blow-molded article, where the temperature of the inner wall of the mold falls between 20° C. lower than the crystallization temperature of the crystalline resin and 5° C. lower than the melting point of the crystalline resin; then, a pressure fluid is introduced into the pinched parison; then the mold is heated to a temperature lower by 10° C. than the melting point of the crystalline resin and a temperature below the melting point of the crystalline resin.