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    LOAD-VARIABLE ROLLING BEARING AND ROLLING ELEMENT FOR THE SAME
    9.
    发明申请
    LOAD-VARIABLE ROLLING BEARING AND ROLLING ELEMENT FOR THE SAME 有权

    公开(公告)号：US20210239158A1

    公开(公告)日：2021-08-05

    申请号：US17163567

    申请日：2021-02-01

    申请人： Young Keun Lee ,  Hyun Yui Sin

    发明人： Young Keun Lee ,  Hyun Yui Sin

    IPC分类号： F16C19/16 ,  F16C33/32

    摘要： A load-variable rolling bearing includes: an outer ring having an outer ring raceway surface with spherical surface contact portions having concave arch sections and a variable contact portion having a shape of a cylinder in such a manner as to be adjacent to the spherical surface contact portions in an axial direction of the spherical surface contact portions; an inner ring having an inner ring raceway surface with spherical surface contact portions having concave arch sections and a variable contact portion having a shape of a cylinder in such a manner as to be adjacent to the spherical surface contact portions in an axial direction of the spherical surface contact portions; and a plurality of rolling elements each having a cylindrical variable contact portion and spherical surface portions formed with convex spherical surfaces on both sides of the variable contact portion.

    Microporous high density polyethylene film
    10.
    发明授权
    Microporous high density polyethylene film 有权
    微孔高密度聚乙烯薄膜

    公开(公告)号：US07332531B2

    公开(公告)日：2008-02-19

    申请号：US10964639

    申请日：2004-10-15

    申请人： Young Keun Lee ,  Jang Weon Rhee ,  Won Young Cho ,  Jung Moon Sung ,  Byoung Cheon Jo ,  Chol Ho Lee ,  In Hwa Jung ,  Byung Rae Jung

    发明人： Young Keun Lee ,  Jang Weon Rhee ,  Won Young Cho ,  Jung Moon Sung ,  Byoung Cheon Jo ,  Chol Ho Lee ,  In Hwa Jung ,  Byung Rae Jung

    IPC分类号： C08J5/22 ,  C08J9/00

    CPC分类号： C08J5/18 ,  C08J2323/06 ,  C08L23/06 ,  C08L91/00 ,  H01M2/145 ,  H01M2/1653 ,  C08L91/06

    摘要： Disclosed is a microporous high density polyethylene film for a battery separator and a method of producing the same. The microporous high density polyethylene film includes high density polyethylene with a weight average molecular weight of 2×105-5×105, containing 5 wt % or less molecule with a molecular weight of 1×104 or less. The microporous high density polyethylene film has tensile strengths of 1,100 kg/cm2 or more in transverse and machine directions respectively, a puncture strength of 0.22 N/μm or more, a gas permeability (Darcy's permeability constant) of 1.3×10−5 Darcy or more, and shrinkages of 5% or less in machine and transverse directions, respectively. Particularly, the microporous high density polyethylene film has an excellent extrusion-compoundabiliy and stretchability and a high productivity, and can improve the performances and stability of a battery produced using the same.

    摘要翻译： 公开了一种用于电池隔膜的微孔高密度聚乙烯膜及其制造方法。 微孔高密度聚乙烯膜包括重均分子量为2×10 5 -5×10 5的高密度聚乙烯，其含有5重量％或更少的分子量为1×10 5 4以下。 微孔高密度聚乙烯膜的横向和机械方向的拉伸强度分别为1100kg / cm 2以上，穿刺强度为0.22N / m 2以上，透气性（达西渗透率常数） 分别为1.3×10 -5以上的达西或以上，并且在纵向和横向上分别为5％以下的收缩。 特别地，微孔高密度聚乙烯膜具有优异的挤出复合性和拉伸性和高生产率，并且可以提高使用其制造的电池的性能和稳定性。