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    Multilayer foams
    11.
    发明公开
    Multilayer foams 失效
    Mehrschichtiger Schaum

    公开(公告)号：EP0922554A1

    公开(公告)日：1999-06-16

    申请号：EP97121595.9

    申请日：1997-12-08

    申请人： Dow Deutschland Inc.

    发明人： Eschenlauer, Georges ,  Mason, Jeffrey John ,  Van Vo, Chau

    IPC分类号： B29C44/46 ,  B29C44/22

    CPC分类号： B29C44/24 ,  B29C44/468

    摘要： The present invention relates to foamed products and method for producing them, comprising a plurality of coalesced extruded layers or layers of coalesced strands of a foamed thermoplastic composition having a low density, by

    (a) providing at least one foamable composition comprising at least one polymer or copolymer and a blowing agent formulation,
    (b) extruding the composition through a die having a plurality of orifices,
    (c) foaming the extruded composition at a foaming temperature which is above the glass-transition temperature or the melting temperature of the polymer composition,
    (d) maintaining the foaming product at an elevated temperature for a sufficient period of time to obtain adhesion between individual foam layers, and
    (e) allowing the foamed product to cool,
    characterized in that a foamed product is obtained comprising a plurality of adherent foam layers, wherein at least one of these foam layers extends across the whole breadth of the foamed product.

    摘要翻译： 本发明涉及发泡产品及其生产方法，该方法包括：通过

    Method of providing a dimensionally-stable, closed-cell polyolefin foam having reduced blowing agent content to the end user
    12.
    发明公开
    Method of providing a dimensionally-stable, closed-cell polyolefin foam having reduced blowing agent content to the end user 失效
    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。

    公开(公告)号：EP0498327A2

    公开(公告)日：1992-08-12

    申请号：EP92101697.8

    申请日：1992-02-03

    申请人： THE DOW CHEMICAL COMPANY

    发明人： Malone, Bruce A.

    IPC分类号： B29C67/22

    CPC分类号： B29C44/5663 ,  B29C44/468 ,  B29C44/5609 ,  B29K2023/00 ,  B29K2105/043 ,  B29K2105/046

    摘要： 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.

    摘要翻译： 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。

    Apparatus and method for dispensing foam onto substrates of large width
    17.
    发明公开
    Apparatus and method for dispensing foam onto substrates of large width 审中-公开
    装置和方法，用于分配泡沫具有宽底物

    公开(公告)号：EP1985376A3

    公开(公告)日：2011-06-29

    申请号：EP08153579.1

    申请日：2008-03-28

    申请人： NORDSON CORPORATION

    发明人： Bürger, Ronald ,  Jones, Frank ,  Pannhausen, Dirk

    IPC分类号： B05C5/02 ,  B29C44/46

    CPC分类号： B29C44/462 ,  B05C5/0254 ,  B05C5/027 ,  B05C11/1013 ,  B05C11/1036 ,  B29C44/348 ,  B29C44/468

    摘要： A method for dispensing a foamed material onto a substrate surface, comprising the steps: generating a relative movement between the substrate surface to be coated and an exit opening of a material dispensing apparatus, mixing at least two material components in a mixing device to provide a free-flowing, foamable dispensing material, generating a pressure differential between the mixing device and the dispensing region located downstream in the direction of flow from a discharge cross-section of the exit opening, conveying the dispensing material from the mixing device for the dispensing material to the exit opening, and discharging the dispensing material from the exit opening onto the substrate surface. The invention proposes that the dispensing material be kept under such a pressure in the adjacent region upstream from the discharge cross-section of the exit opening that the dispensing material in this region has a foaming rate that is less than 10% of the foaming rate which ensues at the end of the foaming process.

    Hollow-strand foam and preparation thereof
    20.
    发明公开
    Hollow-strand foam and preparation thereof 审中-公开
    Schaumhohlsträngstrukturund Verfahren zu deren Herstellung

    公开(公告)号：EP1491315A2

    公开(公告)日：2004-12-29

    申请号：EP04017802.2

    申请日：2000-11-03

    申请人： DOW GLOBAL TECHNOLOGIES INC.

    发明人： Grinshpun, Vyacheslav D. ,  Schaller, Michael E. ,  Tusim, Martin H. ,  Brush, Andrew R. ,  Park, Jonathan D.

    IPC分类号： B29C44/46 ,  B29C44/04 ,  B29C44/22

    CPC分类号： B29C44/468 ,  B29C44/04

    摘要： A foam structure includes hollow coalesced foam strands and, optionally, solid coalesced foam strands and can be prepared using an extrusion die block equipped with apertures that promote forming the hollow strands and, optionally, the solid foam strands.

    摘要翻译： 该方法包括通过具有孔的模具挤出处于凝胶状态的可发泡组合物，只要每个孔产生中空挤出物即可。 可发泡组合物包含发泡剂组合物和成膜组合物。 在促进泡沫泡沫稳定性的温度下将中空挤​​出物转化成发泡股线。 允许挤出物线彼此接触，同时它们保持至少一些表面粘性，以便实现相邻单独股线之间的粘附，并产生中空多股泡沫挤出物。 发泡剂包括二氧化碳，氮气，一氧化二氮，惰性气体，空气，烃，醚，1-6C低级醇，部分卤代烃，氨和/或水。 成膜组合物包含聚苯乙烯和任选的乙烯/苯乙烯互聚物。 还包括以下独立权利要求：（a）用于加工可发泡聚合物组合物的挤出模具; （b）蜂窝泡沫结构; （c）由泡沫结构制成的物品。