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    • 8. 发明授权
    • Apparatus for making dimensionally stable nonwoven fibrous webs
    • 用于制造尺寸稳定的非织造纤维网的装置
    • US06371749B2
    • 2002-04-16
    • US09360090
    • 1999-07-23
    • Delton R. ThompsonDavid A. OlsonPamela A. Percha
    • Delton R. ThompsonDavid A. OlsonPamela A. Percha
    • D04H303
    • D04H3/14D04H1/72D04H3/03D04H3/08D04H3/16D04H5/08
    • A method and apparatus for tentering nonwoven webs during annealing. The nonwoven web of thermoplastic fibers is restrained on a tentering structure at a plurality of tentering points distributed across an interior portion of the web, rather than just along its edges. The nonwoven web is annealed while restrained on the tentering structure to form a dimensionally stable nonwoven fibrous web, dimensionally stable up to at least the heatsetting temperature. The annealed nonwoven fibrous web is then removed from the tentering structure. In one embodiment, the tentering structure restrains the nonwoven fibrous web in a non-planar configuration during the annealing process. The tentering structure includes a plurality of tentering points projecting distally from a tentering support. The tentering points are positioned to be engaged with an interior portion of the web, thus restraining the web during annealing.
    • 一种用于在退火过程中拉伸非织造纤网的方法和装置。 热塑性纤维的非织造纤维网被限制在横跨纸幅的内部分布的多个拉幅部分的拉幅结构上,而不是仅沿着其边缘。 非织造纤维网被退火,同时被限制在拉幅结构上以形成尺寸稳定的非织造纤维幅材,其尺寸稳定至少达到热定型温度。 然后从拉幅结构中除去退火的非织造纤维网。 在一个实施例中,拉伸结构在退火过程期间将非织造纤维网限制在非平面构型。 拉幅结构包括从拉幅支架向远侧突出的多个拉幅点。 倾斜点被定位成与幅材的内部部分接合,从而在退火期间限制幅材。