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:
Sep. 12, 2000
Filed:
Feb. 17, 1998
Nobutsugu Nanba, Kurashiki, JP;
Hideki Nasu, Kurashiki, JP;
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A flame retardant resin composition comprising a thermoplastic resin/flame retardant mixture having fluororesin fibrils dispersed therein, wherein, when a breakage-exposed surface of a tensile force-broken piece of a test sample prepared from the flame retardant composition by injection molding so as to be used in a flame retardancy test by the Vertical Burning Method described in UL-Subject 94 is examined by means of a SEM with respect to a predetermined area of 7 .mu.m.times.7 .mu.m wherein the fibrils are dispersed in the entire region of the predetermined area, the dispersed fibrils exhibit a dispersion morphology in which the fibrils have a diameter of 0.5 mm or less over lengths of the fibrils which lengths correspond to 50% or more of the total length of the fibrils and in which the fibrils have a network configuration comprising one or more intersecting points of fibrils and/or a branched configuration comprising one or more branching points of fibrils, wherein 5 or more intersecting points and/or branching points are present in the predetermined area. The resin composition of the present invention is advantageous not only in that it has high flame retardancy, especially a high property of dripping-prevention upon being burnt, but also in that a shaped article obtained from the resin composition has excellent appearance.