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    • 2. 发明申请
    • MULTIHEADED HOOK
    • 多用挂钩
    • WO2004093590A1
    • 2004-11-04
    • PCT/US2004/004592
    • 2004-02-17
    • 3M INNOVATIVE PROPERTIES COMPANYSETH, JayshreeAUSEN, Ronald, W.VENNE, Janet, A.
    • SETH, JayshreeAUSEN, Ronald, W.VENNE, Janet, A.
    • A44B18/00
    • A44B18/0065B29C43/222B29C47/003B29C47/0033B29C47/0057B29C47/0066B29C47/14B29C67/0044B29C2793/0027B29L2031/729Y10T24/2792Y10T428/24008Y10T428/24017
    • The present invention provides a method for forming preferably a unitary polymeric hook fastener (20) comprising a flexible backing (11), and a multiplicity of spaced hook members (24) projecting from the upper surface of the unitary backing (11) wherein each hook member (24) comprises a multiplicity of hook head elements (28, 29) projecting in substantially the same direction. The hook members each comprise a stem portion (25) attached at one end to the backing (11), and a head portion (28, 29) at the end of the stem portion (25) opposite the backing (11). The head portion (28, 29) can also extend from a side of a stem portion (25) or be omitted entirely to form alternative projections which can be other forms than a hook member. The head portion (28, 29) preferably projects past the stem portion (25) on at least one of two opposite sides. At least the hook head portions (28, 29) have two or more hook head elements (28, 29) on at least one of the two opposing sides of the stem (25). The hook head portions (28, 29) preferably have been heat treated so as to decrease the hook head thickness and thereby reducing or eliminating molecular orientation in at least the hook head in the machine direction.
    • 本发明提供了一种用于形成优选地包括柔性背衬(11)的单一聚合物钩紧固件(20)的方法,以及从整体式背衬(11)的上表面突出的多个间隔开的钩构件(24),其中每个钩 构件(24)包括沿基本相同的方向突出的多个钩头元件(28,29)。 钩构件各自包括在一端附接到背衬(11)的杆部分(25)和在杆部分(25)的与背衬(11)相对的端部处的头部分(28,29)。 头部部分(28,29)也可以从杆部分(25)的一侧延伸,或者完全省略,以形成可以是其它形式的替代突出物,而不是钩形部件。 头部(28,29)优选地在两个相对侧中的至少一个上突出穿过杆部(25)。 至少钩头部分(28,29)在杆(25)的两个相对侧中的至少一个上具有两个或更多个钩头元件(28,29)。 钩头部分(28,29)优选地经过热处理以减小钩头厚度,从而减少或消除至少钩头在机器方向上的分子取向。