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    • 4. 发明授权
    • Extrusion-foamed board of resin blend comprising modified polypropylene resin and polystyrene resin
    • 包含改性聚丙烯树脂和聚苯乙烯树脂的树脂共混物的挤出发泡板
    • US06262138B1
    • 2001-07-17
    • US09582938
    • 2000-07-07
    • Osamu MiyamaHaruo Tomita
    • Osamu MiyamaHaruo Tomita
    • C08J900
    • C08J9/0061C08J2201/03C08J2205/052C08J2323/12C08J2425/00
    • There is provided a foamed article having a low density, large thickness, a high closed cell ratio and a small average cell diameter. A foamed extrusion article having a density of 50 to 10 kg/m3 and a closed cell ratio of at least 40% is obtained by mixing a mixed resin comprising (a) 50 to 95 parts by weight of a polypropylene resin having a melt tension at 230° C. of at least 0.05 N, (b) 50 to 5 parts by weight of a polystyrene resin, and (c) 0.5 to 15.0 parts by weight of a hydrogenated block copolymer of styrene, isoprene and styrene based on 100 parts by weight of the polypropylene resin (a) and the polystyrene resin (b) with a foaming agent in an extruder, and then releasing into a low-pressure zone.
    • 提供具有低密度,大厚度,高闭孔比和小平均泡孔直径的泡沫制品。 通过将包含(a)50至95重量份的具有熔体张力的聚丙烯树脂的混合树脂混合在一起,获得具有50至10kg / m 3密度和至少40%密度的泡沫挤出制品 230℃,至少0.05N,(b)50-5重量份聚苯乙烯树脂,和(c)基于100重量份的苯乙烯,异戊二烯和苯乙烯的氢化嵌段共聚物0.5至15.0重量份 聚丙烯树脂(a)和聚苯乙烯树脂(b)的重量在挤出机中用发泡剂,然后释放到低压区。