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:
Jun. 23, 1981
Filed:
Aug. 11, 1980
Applicant:
Inventors:
Hiroshi Shimizu, Suzuka, JP;
Hiroshi Sato, Suzuka, JP;
Nobuo Miura, Suzuka, JP;
Shuzo Inada, Yokkaichi, JP;
Assignee:
Asahi-Dow Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
264 50 ; 264 53 ; 264D / ; 264D / ; 521 56 ; 521 58 ; 521 60 ; 521 96 ; 521143 ;
Abstract
Expanded particles of a crosslinked polyolefin resin, each particle with uniformly spherical shape, having an average diameter of 1.4 to 5.5 mm, an average expansion ratio of 18 to 37 and specific compression coefficient of 1.6 .times. 10.sup.-3 to 4.0 .times. 10.sup.-3, are found to be produced by two-step foaming operations. They are useful for various purposes such as filtrating material, fillers in stuffed specimens and, especially for preparation of molded articles having constricted portions, giving excellent moldings having smooth surface without failure at corner or edge portions.