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    High melt index polystyrene foam and method
    4.
    发明授权
    High melt index polystyrene foam and method 失效
    高熔体指数聚苯乙烯泡沫和方法

    公开(公告)号：US5286429A

    公开(公告)日：1994-02-15

    申请号：US734836

    申请日：1991-07-24

    申请人： James E. Blythe ,  Edward A. Colombo ,  Charles M. Krutchen ,  Phillip A. Williams ,  Wen-Pao Wu

    发明人： James E. Blythe ,  Edward A. Colombo ,  Charles M. Krutchen ,  Phillip A. Williams ,  Wen-Pao Wu

    IPC分类号： B29C47/00 ,  B29K105/04 ,  C08J9/12 ,  C08L25/04 ,  C08J9/08

    CPC分类号： C08J9/122 ,  B29C44/3402 ,  B29C44/50 ,  C08J2325/04

    摘要： A polystyrene resin in foam form having a basis weight of less than about 20 g/100 in.sup.2 and a density of about 6 lbs./ft.sup.3 or less, the foam precursor of which is either a polystyrene having a melt index of about 8 or more or a polystyrene in combination with a minor proportion of any other material which will result in a melt index of about 8 or more. A method of forming such a polystyrene resin foam structure includes combining the resin in molten form under pressure with the blowing agent of at least approximately 100% carbon dioxide and extruding the mixture through a die into an atmosphere of reduced pressure to form the foam structure.

    摘要翻译： 泡沫形式的聚苯乙烯树脂，其基重小于约20g / 100in 2，密度约6lbs./ft3或更小，其泡沫前体是熔体指数为约8或更高的聚苯乙烯 或者与少量任何其它材料组合的聚苯乙烯，这将导致约8或更高的熔体指数。 形成这种聚苯乙烯树脂泡沫结构的方法包括在压力下将熔融形式的树脂与至少约100％二氧化碳的发泡剂组合，并将混合物通过模具挤出到减压气氛中以形成泡沫结构。

    High melt index polystytene foam and method
    6.
    发明授权
    High melt index polystytene foam and method 失效
    高熔体指数聚苯乙烯泡沫和方法

    公开(公告)号：US5356944A

    公开(公告)日：1994-10-18

    申请号：US181483

    申请日：1994-01-14

    申请人： James E. Blythe ,  Edward A. Colombo ,  Charles M. Krutchen ,  Phillip A. Williams ,  Wen-Pao Wu

    发明人： James E. Blythe ,  Edward A. Colombo ,  Charles M. Krutchen ,  Phillip A. Williams ,  Wen-Pao Wu

    IPC分类号： C08J9/12 ,  C08J9/08

    CPC分类号： C08J9/122 ,  B29C44/3402 ,  B29C44/50 ,  C08J2325/04

    摘要： A polystyrene resin in foam form having a basis weight of less than about 20 g/100 in.sup.2 and a density of about 6 lbs./ft.sup.3 or less, the foam precursor of which is either a polystyrene having a melt index of about 8 or more or a polystyrene in combination with a minor proportion of any other material which will result in a melt index of about 8 or more. A method of forming such a polystyrene resin foam structure includes combining the resin in molten form under pressure with the blowing agent of at least approximately 100% carbon dioxide and extruding the mixture through a die into an atmosphere of reduced pressure to form the foam structure.

    摘要翻译： 泡沫形式的聚苯乙烯树脂，其基重小于约20g / 100in 2，密度约6lbs./ft3或更小，其泡沫前体是熔体指数为约8或更高的聚苯乙烯 或者与少量任何其它材料组合的聚苯乙烯，这将导致约8或更高的熔体指数。 形成这种聚苯乙烯树脂泡沫结构的方法包括在压力下将熔融形式的树脂与至少约100％二氧化碳的发泡剂组合，并将混合物通过模具挤出到减压气氛中以形成泡沫结构。

    Polymer foam, thermoformed shapes thereof and method of forming same
    7.
    发明授权
    Polymer foam, thermoformed shapes thereof and method of forming same 失效
    聚合物泡沫，其热成型形状及其形成方法

    公开(公告)号：US4598104A

    公开(公告)日：1986-07-01

    申请号：US756900

    申请日：1985-07-19

    申请人： Charles M. Krutchen ,  Wen-Pao Wu

    发明人： Charles M. Krutchen ,  Wen-Pao Wu

    IPC分类号： B29C51/00 ,  C08J9/14 ,  C08L69/00 ,  C08L71/12 ,  C08L79/08

    CPC分类号： C08J9/145 ,  B29C44/50 ,  B29C51/002 ,  B29C51/00 ,  B29K2079/00 ,  C08J2379/08

    摘要： A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.

    摘要翻译： 密度小于约20磅/平方英尺的泡沫结构。 其形成方法包括在选自聚醚酰亚胺树脂颗粒，聚碳酸酯树脂颗粒，聚苯醚和聚苯乙烯的聚合物共混物的聚合物构件的压力下形成均匀的熔融共混物，其中颗粒形式与发泡剂一起吸收，随后 通过将其挤压到较低压力的气氛中。 包含吸收了二氯甲烷，氯仿，1,1,2-三氯乙烷或其混合物的所述颗粒的组合物。 一种以片状形式热成形所述泡沫的方法。

    Thermoplastic foam molding
    9.
    发明授权
    Thermoplastic foam molding 失效
    热塑性泡沫成型

    公开(公告)号：US4752625A

    公开(公告)日：1988-06-21

    申请号：US754305

    申请日：1985-07-12

    申请人： Wen-Pao Wu ,  Charles M. Krutchen

    发明人： Wen-Pao Wu ,  Charles M. Krutchen

    IPC分类号： B29C44/34 ,  C08J9/18 ,  C08L71/12 ,  C08J9/00

    CPC分类号： C08J9/18 ,  B29C44/3461 ,  B29C44/445 ,  B29K2025/00 ,  B29K2069/00 ,  B29K2079/00 ,  Y10S521/918

    摘要： A method for forming a molded thermoplastic foam structure comprising partially filling a mold with solvent imbibed particles of a thermoplastic resin, pressurizing said mold under conditions such as to prevent vaporization of said blowing agent during subsequent polymer melting, heating said polymer to a flowable state, releasing the mold pressure to permit foaming of the melt and expansion of the foamed polymer within the mold.

    摘要翻译： 一种用于形成模制的热塑性泡沫结构的方法，包括用热塑性树脂的溶剂吸收颗粒部分地填充模具，在诸如在随后的聚合物熔融期间防止所述发泡剂蒸发的条件下加压所述模具，将所述聚合物加热至可流动状态， 释放模具压力以允许熔体发泡和发泡聚合物在模具内的膨胀。