Process for making a nonwoven web derived from lactic acid, web

Details Process for making a nonwoven web derived from lactic acid, web Process for making a nonwoven web derived from lactic acid, web

1995-10-12

1998-11-10

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156229, 2642108, 2642902, 2642905, D04H 142, D04H 316

Patent

active

058337873

ABSTRACT:
The invention relates to a process for the manufacture of a nonwoven web using filaments of melted polymers, of the type including the steps of spinning the polymer or polymers, of cooling, drawing and laying down fibers on a belt and of bonding said fibers by calendering in order to form said nonwoven web (15), which process furthermore includes a treatment (13, 14) of setting/adjusting the degree of crystallinity of and the internal tension in the fibers making up the nonwoven web. The invention also relates to the nonwovens obtained by the process and to the installations for implementing it.

REFERENCES:
patent: 3949128 (1976-04-01), Ostermeier
patent: 4160799 (1979-07-01), Locey et al.
patent: 5232533 (1993-08-01), Tani et al.

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