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    • 94. 发明申请
    • THERMOPLASTIC RESIN COMPOSITION FOAMED SHEET AND METHOD FOR PRODUCING THE SAME
    • 热塑性树脂组合物发泡片及其制造方法
    • US20100239845A1
    • 2010-09-23
    • US12442974
    • 2007-09-26
    • Tomofumi MaekawaKatsuhiro Fujimoto
    • Tomofumi MaekawaKatsuhiro Fujimoto
    • B32B3/26B29C44/12
    • C08J9/0061B29C44/3469B29C48/022B29C48/08B29C48/40B29K2027/18B29K2105/04B29K2105/046C08J9/122C08J2201/03C08J2300/22C08J2423/00C08J2425/00C08J2427/18C08J2433/00C08J2467/00C08J2469/00Y10T428/249979
    • The present invention takes as its object the provision of a thermoplastic resin foamed sheet having excellent surface exterior appearance, lightweightness, PTT property and light reflectivity and the provision of a method for producing the thermoplastic resin foamed sheet. Specifically, the thermoplastic resin foamed sheet is a foamed sheet including 80 to 99.5% by weight of an (A) thermoplastic resin and 0.5 to 20% by weight of (B) PTFE (polytetrafluoroethylene), wherein when in the foamed sheet interior observed with a SEM (scanning electron microscope), the number of the particles of (B) PTFE having a dispersed particle size falling within a range from 0.05 to 1 μm is represented by (L), the number of the particles of (B) PTFE having a dispersed particle size falling within a range from 1 to 30 μm is represented by (M) and the number of the particles of (B) PTFE having a dispersed particle size falling within a range of 30 μm or more is represented by (N), (L)/(M)=99.99/0.01 to 50/50, and (M)>(N); and the average bubble size in the direction normal to the take-off direction of the foamed sheet is 0.1 to 50 μm.
    • 本发明的目的是提供具有优异的表面外观,轻质性,PTT性能和光反射性的热塑性树脂发泡片材,以及提供热塑性树脂发泡片材的制造方法。 具体地说,热塑性树脂发泡片是包含80〜99.5重量%的(A)热塑性树脂和0.5〜20重量%的(B)PTFE(聚四氟乙烯)的发泡片材,其中当在发泡片材内部观察到 SEM(扫描型电子显微镜),分散粒径在0.05〜1μm范围内的(B)PTFE的粒子数由(L)表示,(B)的PTFE的粒子数为 由(M)表示落入1〜30μm范围内的分散粒径,(N)表示分散粒径在30μm以上的范围内的(B)PTFE的粒子数, (L)/(M)= 99.99 / 0.01〜50/50,(M)>(N) 在与发泡片材的剥离方向正交的方向上的平均气泡尺寸为0.1〜50μm。