Method of making spun-bond web from multicomponent filaments

Details Method of making spun-bond web from multicomponent filaments Method of making spun-bond web from multicomponent filaments

2007-02-13

2010-12-14

Tentoni, Leo B (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

C028S104000, C156S167000, C156S181000, C156S183000, C264S103000, C264S168000, C264S172140, C264S210800, C264S211140, C264S211200

Reexamination Certificate

active

07850899

ABSTRACT:
A web is made by first extruding multicomponent filaments from a spinneret and then passing the extruded filaments through a process air shaft. Cold air is directed against the filaments in the process air shaft to cool and aerodynamically stretch the filaments while excluding the entry of other air into the process air shaft. The cooled and stretched multicomponent filaments are then deposited in a mat on a support, and then the mat of multicomponent filaments to a web is consolidated by subjecting it to water jets at a pressure of 10 bar to 200 bar such that the multicomponent filaments fuse together at crossover points and the filaments have a considerable free length between crossover points where they are fused. Finally the web is heat treated to crinkle the filaments thereof and bulk of the web.

REFERENCES:
patent: 3707746 (1973-01-01), Summers
patent: 4025595 (1977-05-01), Mirhej
patent: 2002/0063364 (2002-05-01), Taylor et al.
patent: 2002/0074697 (2002-06-01), Steinke et al.
patent: WO 0020178 (2000-04-01), None

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