HIGH TENACITY LOW SHRINKAGE POLYAMIDE YARNS
    344.
    发明公开
    HIGH TENACITY LOW SHRINKAGE POLYAMIDE YARNS 有权
    具有高韧性和低收缩聚酰胺变形纱,

    公开(公告)号:EP2205780A1

    公开(公告)日:2010-07-14

    申请号:EP08847642.9

    申请日:2008-10-29

    Abstract: Multi-filament polyamide yarns characterized by high tenacity and low shrinkage are disclosed. Such yarns or fabrics made therefrom can be used in industrial applications in which such a combination of properties is desirable. Such yarns are particularly useful in the manufacture of automobile airbag fabrics. Also disclosed is a process for making such yarns. The yarn manufacturing process involves spin-drawing molten nylon, relaxing and controlling the yarn tension, and then winding the yarn. Yarns made according to this process exhibit linear density in the range of 110-940 decitex, tenacity equal to or greater than 80 cN/tex, and shrinkage, measured at 177° C., of less than 5%.

    REINFORCING FIBER BUNDLES FOR MAKING FIBER REINFORCED POLYMER COMPOSITES
    345.
    发明公开
    REINFORCING FIBER BUNDLES FOR MAKING FIBER REINFORCED POLYMER COMPOSITES 无效
    纤维束用于制备纤维增强聚合物复合材料

    公开(公告)号:EP2185634A1

    公开(公告)日:2010-05-19

    申请号:EP08835788.4

    申请日:2008-09-24

    Abstract: Short-cut synthetic or cellulose-based natural reinforcing fiber is provided for polymer composites in a form that feeds uniformly into a compounding process such as is carried out in a single or twin screw extruder or double armed batch mixer using conventional volumetric or gravimetric metering equipment. Upon being fed to the compounding process, the reinforcing fiber disperses and becomes uniformly distributed in a matrix resin. The reinforcing fibers are provided in the form of cut fiber bundles with a finish composition coating the fibers and forming fugitive inter-fiber bonds within each cut fiber bundle. This provides inter-fiber coherency such that the cut fiber bundles can be fed uniformly via a loss-in-volume or loss-in-weight screw feeder device to a compounding process. Upon mixing in the compounding process with a matrix polymer, the fugitive bonds break, and the cut fiber bundles disintegrate into separate individual fibers dispersed in the matrix polymer. A process for producing the short-cut reinforcing fiber is also provided.

    Abstract translation: 为聚合物复合材料提供了短切合成纤维或基于纤维素的天然增强纤维,其形式为均匀进料到配混过程中,例如在单螺杆或双螺杆挤出机或双臂分批混合机中使用常规容积式或重量计量设备 。 在供应到配混过程中时,增强纤维分散并均匀分布在基体树脂中。 增强纤维以切割纤维束的形式提供,其中最终组合物涂覆纤维并且在每个切割纤维束内形成易损性纤维间粘结。 这提供了纤维间相干性,使得切割后的纤维束可以通过体积损失或重量损失的螺旋进料装置均匀地进料至配料过程。 在混合过程中与基质聚合物混合时,短效键断裂,并且切割的纤维束分解成分散在基质聚合物中的单独的单独纤维。 还提供了生产短切强化纤维的方法。

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