Process for making fibrous web having inelastic extensibility

Details Process for making fibrous web having inelastic extensibility Process for making fibrous web having inelastic extensibility

2007-08-14

2007-08-14

Aftergut, Jeff H. (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S242000

Reexamination Certificate

active

10269798

ABSTRACT:
Component thermoplastic synthetic fiber having inelastic extensibility as well as fiber diameter of 5-20 μm constituting a fibrous web is obtained by melt spinning a mixture of two or more thermoplastic synthetic resins each having a number-average molecular weight in a range of 20000-150000 at a draft ratio of 200-2300. In the case of the mixture consisting of at least two types of thermoplastic synthetic resin Ra, Rb having number-average molecular weights Ma, Mb, respectively, wherein a ratio Ma/Mb is 1.1 or higher, Ra is of 20-80 wt %, Rb is of 80-20 wt % and a sum of Ra and Rb makes up 50-100 wt % of the mixture.

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