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    • 6. 发明公开
    • Method of providing a dimensionally-stable, closed-cell polyolefin foam having reduced blowing agent content to the end user
    • 一种生产具有用于用户的降低的发泡剂含量的聚烯烃的尺寸稳定的,闭孔泡沫的过程。
    • EP0498327A2
    • 1992-08-12
    • EP92101697.8
    • 1992-02-03
    • THE DOW CHEMICAL COMPANY
    • Malone, Bruce A.
    • B29C67/22
    • B29C44/5663B29C44/468B29C44/5609B29K2023/00B29K2105/043B29K2105/046
    • Disclosed is a method of providing closed-cell polyolefin foam having reduced blowing agent content to an end user comprising (a) extruding the polyolefin to form the essentially continuous foam structure defining a multiplicity of channels extending generally longitudinally therethrough; (b) intermittently crimping the essentially continuous foam structure such that the channels extending therethrough are intermittently substantially closed off; (c) intermittently severing the essentially continuous, intermittently crimped foam structure at the crimps therein to form discrete foam structure portions having crimped end portions; (d) cooling the crimped, discrete foam structure portions to an extent sufficient to prevent substantial shrinkage of the crimped, discrete foam structure portions upon initiation of release of the flammable blowing agent from the foam; (e) excising the crimped end portions from the remainder of the crimped, discrete foam structure portions to initiate release of the flammable blowing agent and form uncrimped, discrete foam structure portions; and (f) providing the uncrimped, discrete foam structure portions to the end user.
    • 公开的是提供闭孔聚烯烃泡沫的方法具有降低发泡剂含量在包括到最终用户(a)挤出聚烯烃,以形成基本上连续的泡沫结构限定的通道延伸通过基因反弹纵向存在的多个; (B)间歇地压接本质上检查的连续泡沫结构DASS延伸穿过那里间歇地基本上封闭模具通道; (C)间歇地切断在卷曲的连续本质上,间歇地卷缩泡沫结构的,以形成具有离散的泡沫结构的部分卷曲的端部; (D)冷却该卷曲的,离散的泡沫结构部分,以在程度足以防止卷曲的显着的收缩,在从泡沫的可燃性发泡剂的释放引发离散泡沫结构部分; (E)从所述压接的剩余部分切除压接端部,离散泡沫结构部分以引发易燃发泡剂的释放,并形成未卷曲的,离散的泡沫结构部分; 和(f)提供所述未卷曲的,离散的泡沫结构的部分给最终用户。