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    Process for processing a semicrystalline thermoplastic
    1.
    发明授权
    Process for processing a semicrystalline thermoplastic 失效
    加工半结晶热塑性塑料的工艺

    公开(公告)号：US06391432B1

    公开(公告)日：2002-05-21

    申请号：US09576802

    申请日：2000-05-23

    申请人： Pierre Gilliard ,  Claude Dehennau ,  Petrus J.A. Karsten

    发明人： Pierre Gilliard ,  Claude Dehennau ,  Petrus J.A. Karsten

    IPC分类号： B32B100

    CPC分类号： B29C55/00 ,  B29K2023/12 ,  Y10T428/31 ,  Y10T428/31855

    摘要： A process for processing a thermoplastic, which includes, in succession, the following steps: (1) a molten semicrystalline thermoplastic extrudate is cooled to a temperature T1 which is greater than the crystallization temperature (Tc) of the thermoplastic and is less than Tf+5° C., Tf denoting the melting point of the thermoplastic; (2) next, the extrudate is drawn in the molten state; (3) next, the extrudate is relaxed, at a temperature T3 which is between Tc and Tf, for a duration at least equal to the average relaxation time (&tgr;3) of the thermoplastic at the relaxation temperature, and after the drawing; (4) next, the extrudate is quenched to a temperature T4 which is less than Tc. In particular, this process makes it possible to manufacture a film essentially consisting of at least one propylene homopolymer, with a thickness of from 100 to 250 &mgr;m and having a hot shrinkage of at most 20%, a haze of less than or equal to 3% and a total transparency with respect to air of greater than 70%.

    摘要翻译： 一种用于加工热塑性塑料的方法，其连续包括以下步骤：（1）将熔融的半结晶热塑性挤出物冷却至大于热塑性塑料的结晶温度（Tc）的温度T1，并且小于Tf + 5℃，Tf表示热塑性塑料的熔点;（2）接下来，挤出物在熔融状态下拉伸;（3）接下来，挤出物在Tc和Tf之间的温度T3下松弛， 至少等于松弛温度下和拉伸后热塑性塑料的平均松弛时间（t = 3）的持续时间;（4）接下来，将挤出物淬火至小于Tc.的温度T4。特别地， 该方法使得可以制造基本上由至少一种丙烯均聚物组成的膜，厚度为100至250μm，热收缩率至多为20％，雾度小于或等于3％，并且 相对于空气的透明度更大 70％。

    Process for processing a semicrystalline thermoplastic
    2.
    发明授权
    Process for processing a semicrystalline thermoplastic 失效
    半结晶热塑性塑料加工工艺

    公开(公告)号：US06174479B1

    公开(公告)日：2001-01-16

    申请号：US08931838

    申请日：1997-09-17

    申请人： Pierre Gilliard ,  Claude Dehennau ,  Petrus J. A. Karsten

    发明人： Pierre Gilliard ,  Claude Dehennau ,  Petrus J. A. Karsten

    IPC分类号： B29C4706

    CPC分类号： B29C55/00 ,  B29K2023/12 ,  Y10T428/31 ,  Y10T428/31855

    摘要： A process for preparing thermoplastics comprising the steps of cooling an extrudate to a temperature T1, drawing the molten extrudate, relaxing the extrudate at a temperature T3 for a duration of at least the average relaxation time of the thermoplastic at the relaxation temperature, and quenching the extrudate to a temperature T4. The process enables the manufacture of films consisting of at least one propylene homopolymer with a thickness of 100 to 250 &mgr;m and having a hot shrinkage of at most 20%, a haze of less than or equal to 3% and a total transparency with respect to air of greater than 70%.

    摘要翻译： 一种制备热塑性塑料的方法，包括以下步骤：将挤出物冷却至温度T1，拉伸熔融挤出物，在T3温度下使挤出物在至少在松弛温度下的平均松弛时间持续至少，并淬火 挤出至温度T4。 该方法能够制造由至少一种厚度为100至250μm的丙烯均聚物组成的薄膜，并且具有至多20％的热收缩率，小于或等于3％的雾度和相对于 空气大于70％。

    Pliable crystalline polymer
    4.
    发明授权
    Pliable crystalline polymer 失效
    柔韧的结晶聚合物

    公开(公告)号：US5489661A

    公开(公告)日：1996-02-06

    申请号：US191918

    申请日：1994-02-04

    申请人： Pierre Gilliard

    发明人： Pierre Gilliard

    IPC分类号： B29C55/00 ,  C08F10/02

    CPC分类号： B29C55/00

    摘要： An oriented crystalline polymer includes a crystalline polymer which is oriented, preferably above its melting temperature, which is pliable in the absence of any plasticizing adjuvant, and which exhibits a tensile modulus E, measured in the drawing direction, of between 0.3 and 0.8 E.sub.0, E.sub.0 being the tensile modulus of the same polymer, unoriented.

    摘要翻译： 定向结晶聚合物包括定向的结晶聚合物，优选高于其熔融温度，其在没有任何增塑助剂的情况下是柔韧的，并且其在拉伸方向上测得的拉伸模量E为0.3-0.8E0， E0是相同聚合物的拉伸模量，未取向。

    Pliable crystalline polymer and process for its production
    7.
    发明授权
    Pliable crystalline polymer and process for its production 失效
    柔韧的结晶聚合物及其生产工艺

    公开(公告)号：US5306796A

    公开(公告)日：1994-04-26

    申请号：US864545

    申请日：1992-04-07

    申请人： Pierre Gilliard

    发明人： Pierre Gilliard

    IPC分类号： B29C55/00 ,  C08F10/02 ,  C08F10/06 ,  C08F110/02 ,  C08F110/06

    CPC分类号： B29C55/00

    摘要： An oriented crystalline polymer, which is composed of a crystalline polymer which is oriented, which is pliable in the absence of any plasticizing adjuvant, and which exhibits a tensile modulus E, measured in the drawing direction, of between 0.3 and 0.8 E.sub.0, E.sub.0 being the tensile modulus of the same crystalline polymer, unoriented.

    摘要翻译： 取向结晶聚合物，其由定向的结晶聚合物组成，其在不存在任何增塑助剂的情况下是柔韧的，并且在拉伸方向上测得的拉伸模量E为0.3-0.8E0，E0为 相同结晶聚合物的拉伸模量为无取向。