Methods of forming fibrous filtration face masks
    10.
    发明授权
    Methods of forming fibrous filtration face masks 失效
    形成纤维过滤面罩的方法

    公开(公告)号:US5307796A

    公开(公告)日:1994-05-03

    申请号:US632964

    申请日:1990-12-20

    摘要: A method of forming a cup-shaped, non-woven fibrous shaping layer for a filtering face mask. The method includes the steps: (a) heating a non-woven fibrous web that contains at least 40 weight percent thermally bonding fibers, where at least 10 weight percent of the fibrous material is bicomponent fibers, to a temperature at which the thermally bonding fibers, including at least one component of the bicomponent fibers, are softened; and then (b) molding the heated non-woven fibrous web, while the thermally bonding fibers and the at least cone component of the bicomponent fibers are still soft, in a mold having molding members that are at a temperature below the softening temperatures of the thermally bonding fibers, including all components of the bicomponent fibers.

    摘要翻译: 一种形成用于过滤面罩的杯形非织造纤维成形层的方法。 该方法包括以下步骤:(a)加热含有至少40重量%热粘合纤维的非织造纤维网,其中至少10重量%的纤维材料是双组分纤维,其中热粘合纤维 包括双组分纤维的至少一种组分软化; 然后(b)在具有模制构件的模具中,在热粘合纤维和双组分纤维的至少锥形组分仍然柔软的同时,(b)模制加热的无纺纤维网,其温度低于 热粘合纤维,包括双组分纤维的所有组分。