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:
Mar. 06, 2001
Filed:
Aug. 05, 1999
Isamu Takimoto, Kyotanabe, JP;
Masaaki Sahara, Himeji, JP;
Sanwa Kako Company Limited, Kyoto-Fu, JP;
Abstract
A crosslinked ethylene-olefin copolymer foam and a method for the production thereof are disclosed. The foam having a gel content of 70 to 99%, an apparent density of 0.2 to 0.02 g/cm,, 25% compression set at 40° C. of 0.1 to 20.0%, 25% compression hardness of 0.1 to 1.0 kgf/cm,, and Asker C type surface hardness of 3 to 40 is foamed from a copolymer of ethylene and &agr;-olefin having 3 to 18 carbon atoms, the copolymer having a melt flow rate (MFR) of 0.1 to 100 g/10 minutes, a critical shear rate (CSR) satisfying the equation: log[CSR]≦2.48+0.500×log[MFR], a density of 0.860 to 0.935 g/cm,, a Q value determined by the size exclusion chromatography (SEC) of 1.5 to 4, and an extrapolated end temperature of melting (Tem) of 65° C. to 130° C.