High molecular weight copolyesters for high modulus fibers
    8.
    发明授权
    High molecular weight copolyesters for high modulus fibers 失效
    用于高模量纤维的高分子量共聚酯

    公开(公告)号:US5453321A

    公开(公告)日:1995-09-26

    申请号:US53058

    申请日:1993-04-26

    摘要: High to ultrahigh polyester compositions comprising monomer units derived from 2,6-naphthalenedicarboxylic acid, 4,4'-bibenzoic acid and ethylene glycol are useful as fibers and molding resins when the mole ratio of 4,4'-bibenzoic acid to 2,6-naphthalenedicarboxylic acid is from about 60:40 to about 40:60, and especially when the two diacids are included in about equimolar amounts. These compositions yield fiber with excellent tensile properties, both at room temperature and at elevated temperatures. When these compositions are melt spun at a relatively low melt temperature and high draw down ratio, fibers with excellent tensile properties are obtained without a subsequent drawing step.

    摘要翻译: 包含衍生自2,6-萘二甲酸,4,4'-二苯甲酸和乙二醇的单体单元的高超高分子聚酯组合物可用作纤维和模塑树脂,当4,4'-二苯甲酸与2,6 - 萘二甲酸为约60:40至约40:60,特别是当两种二酸以约等摩尔量包含时。 这些组合物在室温和升高的温度下产生具有优异拉伸性能的纤维。 当这些组合物在相对低的熔融温度和高的拉伸比下进行熔融纺丝时,获得具有优异拉伸性能的纤维,而无需随后的拉伸步骤。

    Method and apparatus of transferring a packet and generating an error
detection code therefor
    10.
    发明授权
    Method and apparatus of transferring a packet and generating an error detection code therefor 失效
    具有鞘/纤维芯微结构的宠物纱线的形成

    公开(公告)号:US5935499A

    公开(公告)日:1999-08-10

    申请号:US987883

    申请日:1997-12-08

    IPC分类号: D01F6/62 D01F8/14 D01D5/12

    CPC分类号: D01F8/14 D01F6/62

    摘要: Fibers and yarns of polyethylene terephthalate (PET) and PET copolymers with a sheath/filamentous core microstructure are formed from unoriented and non crystalline "as spun" source fibers and yarns by drawing to high draw ratios in one step. Fibers and yarns with the sheath/filamentous core microstructure are stiffer than commercial PET fibers. Fibers and yarns with the sheath/filamentous core microstructure may be annealed and relaxed to increase their dimensional stability without loss of the sheath/filamentous core microstructure.

    摘要翻译: 聚对苯二甲酸乙二醇酯(PET)的纤维和纱线和具有鞘/丝状核心微观结构的PET共聚物由无取向和非结晶的“纺丝”源纤维和纱线通过在一个步骤中拉伸至高拉伸比而形成。 具有鞘/丝状核微结构的纤维和纱线比商业PET纤维更硬。 具有鞘/丝状核微观结构的纤维和纱线可以退火和松弛以增加其尺寸稳定性,而不损失护套/丝状核心微结构。