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    • 1. 发明授权
    • Method for accelerating removal of residual blowing agent from extruded
flexible foams
    • 从挤出的柔性泡沫中加速除去残余发泡剂的方法
    • US5411689A
    • 1995-05-02
    • US37036
    • 1993-03-25
    • Shau-Tarng LeeAndrew Oiestad
    • Shau-Tarng LeeAndrew Oiestad
    • B29C35/02B29C37/00B29C44/56B29C44/00
    • B29C35/0277B29C44/56B29C44/5609B29C37/006B29K2105/046Y10S264/15
    • A method is disclosed for accelerating the removal of blowing agent from elongate, flexible polyolefin foam bodies, such as polyethylene foam sheeting, in the absence of substantial tension on the foam body so as to avoid breaks in the foam body. The elongate flexible foam body is introduced into a heating zone and draped over a plurality of substantially parallel bars in an endless path. Tension on the foam body is avoided because the foam loops are free hanging between these parallel bars. An endless drive means transports the parallel bars through the heating zone about the endless path, thereby transporting the foam body through the heating zone for removal of blowing agent. Forced heated air is blown over the exposed surface of the foam body at a pre-determined temperature and for a pre-determined time sufficient to remove a substantial portion of the residual blowing agent and to cause sufficient air to diffuse into the foam body so that there is no substantial reduction in the thickness of the foam.
    • 公开了一种用于在泡沫体上不存在实质张力的情况下加速从细长的柔性聚烯烃泡沫体(例如聚乙烯泡沫片)中除去发泡剂的方法,以避免泡沫体中的断裂。 细长的柔性泡沫体被引入加热区域并且在多个基本上平行的条上悬挂在环形路径中。 避免泡沫体上的张力,因为泡沫环自由悬挂在这些平行杆之间。 环形驱动装置将平行杆通过围绕环形路径的加热区输送,从而将泡沫体输送通过加热区以除去发泡剂。 强制加热的空气以预定的温度吹过泡沫体的暴露的表面,并且预定时间足以除去大部分的残留的发泡剂并引起足够的空气扩散到泡沫体中,使得 泡沫的厚度没有显着降低。
    • 10. 发明授权
    • Polyolefin products and process additives therefor having reduced transfer to substrates
    • 聚烯烃产品及其加工添加剂具有减少的转移到基材
    • US06232355B1
    • 2001-05-15
    • US09614499
    • 2000-07-11
    • Nelson E. MalwitzNatarajan S. RameshShau-Tarng Lee
    • Nelson E. MalwitzNatarajan S. RameshShau-Tarng Lee
    • C08J900
    • C08K5/103C08J9/0023C08J9/0028C08J9/141C08J2203/14C08J2323/02C08K5/20Y10S516/915C08L23/02
    • A process additive for polyolefin films and foams produces products having reduced aging time and reduced greasiness and reduced grease-like transfer as compared to glycerol monostearate (GMS). Carbon dioxide based blowing agents are suitable. The process additive comprises a fatty acid N-aliphatic alcohol amide of the general formula R—CON(R′)R″. R is a fatty hydrocarbon radical having from about 8 to 30 carbons. R′ typically is hydrogen. R′ can also be an alkyl radical of from about 1 to 6 carbons or an alkyl alcohol radical of from about 1 to 6 carbons. R″ is an alkyl alcohol fragment of from about 1 to 6 carbons. The alkyl alcohol fragments can be monohydric or polyhydric. Secondary fatty monoalkanolamides in which R′ is hydrogen are particularly useful, especially stearamide monoethanolamine (MEA). The benefits of the invention can be achieved and enhanced in some examples by mixing the fatty acid N-aliphatic alcohol amide with an ester of a long chain fatty acid with a polyhydric alcohol, including GMS. Examples of fatty acid N-aliphatic alcohol amides include cocamide MEA, lauramide monoisopropylamine (MIPA), oleamide MIPA, and stearamide 2,3-propanediol.
    • 与甘油单硬脂酸酯(GMS)相比,用于聚烯烃膜和泡沫的工艺添加剂产生具有减少的老化时间和减少的油脂并减少类似脂肪的转移的产物。 二氧化碳基发泡剂是合适的。 加工添加剂包括通式为R-CON(R')R“的脂肪酸N-脂族醇酰胺。 R是具有约8至30个碳的脂肪烃基。 R'通常是氢。 R'也可以是约1至6个碳的烷基或约1至6个碳的烷基醇基团。 R“是约1至6个碳的烷基醇片段。 烷基醇片段可以是一元或多元。 其中R'是氢的二级脂肪单烷醇酰胺特别有用,特别是硬脂酰胺单乙醇胺(MEA)。 通过将脂肪酸N-脂肪醇酰胺与长链脂肪酸的酯与多元醇(包括GMS)混合,可以在一些实施例中实现和增强本发明的益处。 脂肪酸N-脂肪醇酰胺的实例包括椰油酰胺MEA,月桂酰胺单异丙胺(MIPA),油酰胺MIPA和硬脂酰胺2,3-丙二醇。