Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1998-02-17
2000-09-12
Le, H. Thi
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428412, 428421, 428422, 428920, 428339, 524520, 525199, 525928, B32B 516
Patent
active
061175420
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.
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Nanba Nobutsugu
Nasu Hideki
Asahi Kasei Kogyo Kabushiki Kaisha
Le H. Thi
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