Thermo-mechanical modification of nonwoven webs

Details Thermo-mechanical modification of nonwoven webs Thermo-mechanical modification of nonwoven webs

1996-03-11

2000-04-18

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

2642902, 264291, 264DIG73, B29C 5506, B29C 5508

Patent

active

06051177&

ABSTRACT:
A process for thermomechanically treating heat bonded thermoplastic and partially thermoplastic nonwoven webs while under low strain rate tension results in significant improvements to the nonwoven web's conformability, softness and impart a high degree of commercially valuable elasticity. The resultant webs find use in all nonwoven applications where softness, conformability and elasticity are useful. The process develops elasticity in only one direction but the two embodiments provide the ability to create elasticity in the machine or cross machine direction of a roll of precursor material. In addition virtually any precursor web containing at least 60% thermally bonded thermoplastic fibers can be used.

REFERENCES:
patent: 3047444 (1962-07-01), Harwood
patent: 4048364 (1977-09-01), Harding et al.
patent: 4408974 (1983-10-01), Comerio
patent: 5053066 (1991-10-01), Hassenboehler
patent: 5244482 (1993-09-01), Hassenboehler et al.
patent: 5441550 (1995-08-01), Hassenboehler et al.
patent: 5443606 (1995-08-01), Hassenboehler et al.

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