Method for preparing high bulk composite sheets

Details Method for preparing high bulk composite sheets Method for preparing high bulk composite sheets

2006-01-10

2006-01-10

Yao, Sam Chuan (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S148000, C156S181000, C156S283000, C156S380200, C264S109000, C264S122000, C264S128000, C264S168000, C264S172140, C264S172150, C264S175000

Reexamination Certificate

active

06984276

ABSTRACT:
This invention relates to a method for preparing nonwoven fabrics having an improved balance of properties in the machine and cross-directions. More specifically, the invention utilizes nonwoven webs that include relatively low levels of multiple-component fibers having latent three-dimensional spiral crimp combined with fibers that do not develop spiral crimp. The latent spiral crimp of the multiple-component fibers is activated, such as by heating, under free shrinkage conditions, after formation of the nonwoven web to achieve re-orientation of the non-spirally-crimpable fibers and an improved balance of properties such as tensile strength and modulus.

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