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28 条记录 (耗时 0.023 秒)

    Compatible linear and branched ethylenic polymers and foams therefrom
    1.
    发明授权
    Compatible linear and branched ethylenic polymers and foams therefrom 有权
    相容的线性和支化烯烃聚合物和泡沫

    公开(公告)号：US06887912B2

    公开(公告)日：2005-05-03

    申请号：US10743645

    申请日：2003-12-22

    申请人： Nelson E. Malwitz ,  Natarajan S. Ramesh ,  Shau-Tarng Lee

    发明人： Nelson E. Malwitz ,  Natarajan S. Ramesh ,  Shau-Tarng Lee

    IPC分类号： C08F2/00 ,  C08J9/14 ,  C08F36/04 ,  C08F136/04 ,  C08F210/00 ,  C08F236/04 ,  C08L23/00

    CPC分类号： C08J9/141 ,  C08J2205/052 ,  C08J2323/02

    摘要： An expanded cellular ethylenic polymer product is provided from an irradiated, noncross-linked linear ethylenic polymer. Linear ethylenic polymers can be irradiated at ambient conditions sufficient to introduce branching in the polymer in the absence of detectable cross-linking as indicated by the absence of gels. The irradiated linear ethylenic polymer is compatible with highly branched low density polyethylene and, when mixed therewith, produces a resin having a single broad based melting temperature range as determined by direct scanning calorimetry, which indicates that the polymers in the mixture have similar crystallization behavior suitable for producing low density foams by extrusion foaming. The linear polymers can be obtained from recycled shrink wrap film. Low densities of from 0.7 to less than 4 pcf can be achieved. The foams typically have improved tear resistance as compared to previous products prepared from low density polyethylene, at comparable low densities.

    摘要翻译： 从照射的非交联的直链烯属聚合物提供膨胀的细胞烯属聚合物产物。 直链烯属聚合物可在不存在可检测的交联作用的情况下在足以引入聚合物中的支化物的环境条件下照射，如不存在凝胶所示。 经辐射的线性烯属聚合物与高度支化的低密度聚乙烯相容，当与其混合时，产生具有通过直接扫描量热法确定的单一宽基熔点温度范围的树脂，这表明混合物中的聚合物具有相似的结晶行为 用于通过挤出发泡生产低密度泡沫。 线性聚合物可以从再循环的收缩包装膜获得。 可实现0.7至小于4 pcf的低密度。 与以低密度聚乙烯制备的以前的产品相比，泡沫通常具有改善的抗撕裂性。

    Method for making oriented polyethylene foam and foam produced thereby
    3.
    发明授权
    Method for making oriented polyethylene foam and foam produced thereby 有权
    制造取向聚乙烯泡沫的方法和由此生产的泡沫

    公开(公告)号：US06245266B1

    公开(公告)日：2001-06-12

    申请号：US09268396

    申请日：1999-03-15

    申请人： Natarajan S. Ramesh ,  Lloyd George

    发明人： Natarajan S. Ramesh ,  Lloyd George

    IPC分类号： C08J900

    CPC分类号： B29C55/00 ,  B29C44/352 ,  B29C44/5627 ,  C08J9/36 ,  C08J2201/03 ,  C08J2323/02

    摘要： A method for making an oriented foam generally includes the steps of: a. blending molten polyethylene and a blowing agent to form a foamable mixture; b. producing a foam by extruding the mixture at a predetermined rate through a die and into a region of reduced pressure so that the blowing agent expands within the mixture; and c. orienting the foam by drawing the foam out of the die at a rate that is between 1 and 1.5 times greater than the predetermined rate at which the mixture is extruded.

    摘要翻译： 制备定向泡沫的方法通常包括以下步骤：a。 混合熔融聚乙烯和发泡剂以形成可发泡混合物; b。 通过将模具以预定的速率挤出混合物并进入减压区域以使发泡剂在混合物内膨胀来生产泡沫; andc。 通过将模具中的泡沫以比混合物挤出的预定速率大1至1.5倍的速率将泡沫从模具中取出来定向泡沫。

    Process for Preparing a Heat Resistant Polylactic Acid Foamed Article
    6.
    发明申请
    Process for Preparing a Heat Resistant Polylactic Acid Foamed Article 有权
    制备耐热聚乳酸发泡制品的方法

    公开(公告)号：US20120223459A1

    公开(公告)日：2012-09-06

    申请号：US13040632

    申请日：2011-03-04

    申请人： A. Victoria Nawaby ,  Eric Kragness ,  Robert Babrowicz ,  Natarajan S. Ramesh ,  Nilesh Amrutiya ,  Eugenio Longo

    发明人： A. Victoria Nawaby ,  Eric Kragness ,  Robert Babrowicz ,  Natarajan S. Ramesh ,  Nilesh Amrutiya ,  Eugenio Longo

    IPC分类号： B29C51/42

    CPC分类号： C08J9/36 ,  B29C51/002 ,  B29K2105/04 ,  B29K2995/004 ,  C08J2367/04

    摘要： Some embodiments of the present invention provides a method of preparing a thermoformed article composed of polylactic acid that includes the steps of providing a foam sheet comprising polylactic acid having a D-lactic acid stereo-isomer content that is about 3 mole % or less, exposing the sheet to a temperature of at least about 190° C., and forming the heated sheet in a mold at a mold temperature that is at least about 50° C. and for a length of time to form a thermoformed article having a PLA crystalline content of at least about 10%. Surprisingly, it has been discovered that heat resistant thermoformed articles can be prepared in accordance with embodiments of the invention wherein the time required for forming the foam sheet into a molded article is less than about 10 seconds.

    摘要翻译： 本发明的一些实施方案提供了制备由聚乳酸组成的热成型制品的方法，其包括以下步骤：提供包含D-乳酸立体异构体含量为约3摩尔％以下的聚乳酸的发泡片，曝光 将片材加热至至少约190℃的温度，并将模具中的加热片材在至少约50℃的模具温度下形成并且长时间以形成具有PLA结晶的热成型制品 含量至少约10％。 令人惊奇的是，已经发现，根据本发明的实施方案可以制备耐热热成型制品，其中将泡沫片形成成型制品所需的时间小于约10秒。

    Apparatus and Method for Preparing a UV-Induced Crosslinked Foam
    7.
    发明申请
    Apparatus and Method for Preparing a UV-Induced Crosslinked Foam 审中-公开
    用于制备UV诱导的交联泡沫的装置和方法

    公开(公告)号：US20080114091A1

    公开(公告)日：2008-05-15

    申请号：US11560042

    申请日：2006-11-15

    申请人： Nelson E. Malwitz ,  Natarajan S. Ramesh

    发明人： Nelson E. Malwitz ,  Natarajan S. Ramesh

    IPC分类号： C08J3/28 ,  B01L1/00

    CPC分类号： C08J3/28

    摘要： The present invention provides a method for producing a UV induced crosslinked foam in which a melt stream comprising a thermoplastic polymer, a UV crosslinking agent and a photoinitiator is crosslinked by exposing the melt stream to a source of UV light source prior to extruding the melt through an extrusion die. Exposing the melt stream to UV light causes the photoinitiator to become excited and react with the crosslinking agent to generate a free radical. The thus generated free radical reacts with the thermoplastic polymer to induce crosslinking in the polymer. Crosslinking of the polymer can be done prior to extrusion so that the crosslinking process can be carried out without additional steps and/or without the aid of chemical crosslinking agents. The invention also provides an apparatus for producing a crosslinked foam in which the apparatus includes a UV chamber disposed between the extruder and the die through which UV light can be introduced into the melt stream.

    摘要翻译： 本发明提供一种制备UV诱导交联泡沫的方法，其中包含热塑性聚合物，UV交联剂和光引发剂的熔体流在将熔体流挤出之前将熔体流暴露于UV光源之前进行交联 挤出模具。 将熔融流体暴露于UV光使得光引发剂变得激发并与交联剂反应以产生自由基。 由此产生的自由基与热塑性聚合物反应以引发聚合物中的交联。 聚合物的交联可以在挤出之前进行，使得交联过程可以在没有附加步骤和/或不借助化学交联剂的情况下进行。 本发明还提供了一种用于生产交联泡沫的装置，其中该装置包括设置在挤出机和模具之间的UV室，通过UV室可将UV光引入到熔体流中。

    Polyolefin foam/film composite and method for making the same
    8.
    依法登记的发明
    Polyolefin foam/film composite and method for making the same 有权

    公开(公告)号：USH2104H1

    公开(公告)日：2004-05-04

    申请号：US09605499

    申请日：2000-06-28

    申请人： Natarajan S. Ramesh

    发明人： Natarajan S. Ramesh

    IPC分类号： B32B326

    摘要： A composite structure, which includes: a. a foam sheet comprising polyolefin; and b. a film sheet adhered to the foam sheet, wherein the film sheet (1) comprises polypropylene, (2) is stretch-oriented in at least one direction, (3) has a thickness of less than 0.9 mil, and (4) has a larger surface area than the foam sheet such that at least one edge of the film sheet extends beyond a corresponding edge of the foam sheet.

    Polyolefin products and process additives therefor having reduced transfer to substrates
    10.
    发明授权
    Polyolefin products and process additives therefor having reduced transfer to substrates 失效
    聚烯烃产品及其加工添加剂具有减少的转移到基材

    公开(公告)号：US6005015A

    公开(公告)日：1999-12-21

    申请号：US944732

    申请日：1997-10-06

    申请人： Nelson E. Malwitz ,  Natarajan S. Ramesh

    发明人： Nelson E. Malwitz ,  Natarajan S. Ramesh

    IPC分类号： C08K5/103 ,  C08K5/20 ,  C08J9/00

    CPC分类号： C08K5/103 ,  C08K5/20

    摘要： A process additive for polyolefin films and foams produces products having reduced greasiness and reduced grease-like transfer as compared to glycerol monostearate (GMS). 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.

    摘要翻译： 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降低的油脂和减少类似油脂的转移的产品。 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。