Process for surface-modifying polypropylene or polyethylene
    1.
    发明授权
    Process for surface-modifying polypropylene or polyethylene 失效
    表面改性聚丙烯或聚乙烯的方法

    公开(公告)号:US5200274A

    公开(公告)日:1993-04-06

    申请号:US896944

    申请日:1992-06-11

    摘要: A process for coating a polypropylene or polyethylene surface with a maleic acid-grafted polypropylene or polyethylene copolymer, and stretching the surface to increase permeability without damaging the coated surface. In this process, a dope containing the graft copolymer is applied to the polypropylene or polyethylene surface, e.g. by dip coating, at a temperature high enough to keep the copolymer solvated in the dope solvent; the surface is then dried. The permeability of the surface is improved by stretching the surface at least about 50% beyond its original area or length such that when the stretching force is released a residual strain of less than about 11% exists. The stretching operation may be done simultaneously with or subsequent to the coating operation.

    摘要翻译: 用马来酸接枝的聚丙烯或聚乙烯共聚物涂覆聚丙烯或聚乙烯表面的方法,并且拉伸表面以增加渗透性而不损坏涂覆的表面。 在该方法中,将含有接枝共聚物的涂料施用于聚丙烯或聚乙烯表面,例如聚丙烯或聚乙烯表面。 通过浸涂,在足够高的温度下使共聚物溶解在涂料溶剂中; 然后将表面干燥。 通过将表面拉伸超过其原始面积或长度至少约50%来提高表面的渗透性,使得当拉伸力释放时,存在小于约11%的残余应变。 拉伸操作可以与涂布操作同时或之后进行。

    Biasing arrangement and filter unit for a filtering apparatus
    2.
    发明授权
    Biasing arrangement and filter unit for a filtering apparatus 失效
    过滤装置的偏置布置和过滤单元

    公开(公告)号:US4442004A

    公开(公告)日:1984-04-10

    申请号:US394195

    申请日:1982-07-01

    IPC分类号: B01D29/11 B01D29/32

    CPC分类号: B01D29/111 B01D2201/0438

    摘要: The present invention relates to a biasing arrangement for use with a filter element having a longitudinal bore therethrough. The biasing arrangement includes a spring element having first and second ends and being comprised of a plastic material. The spring element is deformable by pressure applied in the direction generally along an axis extending between the first and second ends. A sealing disk is adapted to seal an end of the longitudinal bore of the filter element. The sealing disk is also comprised of a plastic material and is positively secured to an end of the spring element. According to a further aspect of the present invention, the sealing disk is positively secured to an end of the filter element to define an integral filter unit. In the preferred embodiment, the spring element, the sealing disk, and the filter element are all comprised of compatible plastic materials. In accordance with a further aspect of the present invention, the spring element has a non-linear load/deflection characteristic such that a large force is obtained during initial deflection followed by a substantially constant force upon further deflection.

    摘要翻译: 本发明涉及一种用于具有穿过其中的纵向孔的过滤元件的偏置装置。 偏压装置包括具有第一和第二端并由塑料材料构成的弹簧元件。 弹簧元件可以通过沿着大致沿着在第一和第二端之间延伸的轴线的方向施加的压力而变形。 密封盘适于密封过滤元件的纵向孔的端部。 密封盘还包括塑料材料,并且被牢固地固定到弹簧元件的端部。 根据本发明的另一方面,密封盘被牢固地固定到过滤元件的端部以限定一体式过滤器单元。 在优选实施例中,弹簧元件,密封盘和过滤元件都由兼容的塑料材料构成。 根据本发明的另一方面,弹簧元件具有非线性负载/偏转特性,使得在初始偏转期间获得大的力,随后在进一步偏转时获得基本恒定的力。

    Flame retardant polybutylene terephthalate
    3.
    发明授权
    Flame retardant polybutylene terephthalate 失效
    阻燃聚对苯二甲酸丁二醇酯

    公开(公告)号:US4732921A

    公开(公告)日:1988-03-22

    申请号:US938198

    申请日:1986-12-05

    CPC分类号: C08L67/02

    摘要: A flame-resistant polybutylene terephthalate molding composition has vastly improved fatigue strength and improved melt flow by incorporating therein a halogenated epoxy flame retardant represented by the general formula: ##STR1## wherein an n is the degree of polymerization and the halogenated epoxy resin has a molecular weight of at least about 20,000 to 40,000; X is a chlorine or bromine atom, and i is an integer of from 1-4.

    摘要翻译: 耐火聚对苯二甲酸丁二醇酯模塑组合物通过掺入由以下通式表示的卤代环氧阻燃剂,具有极大提高的疲劳强度和改善的熔体流动性:其中n为 聚合度和卤化环氧树脂的分子量至少约为20,000〜40,000; X是氯或溴原子,i是1-4的整数。