Sealable nonwoven web
AssigneeAir Products and Chemicals, Inc.
InventorsKambiz Bayat Makoui, Joel Erwin Goldstein
Life of this patent
Estimating the term…
Abstract
Disclosed is a process for producing a laminate suited for use in producing disposable absorbent products comprising a nonwoven web formed from randomly dispersed fibers bonded with a crosslinked vinyl acetate/ethylene adhesive and a particulate polymeric absorbent entrapped within the laminate in fixed location by means of adhesively bonding the nonwoven web to itself or to another substrate, the improvement which comprises utilizing a nonwoven web incorporating an acrylic or vinyl acetate/ethylene adhesive having the following characteristics, and further, said nonwoven web adhesively bonded to itself or to another substrate through the crosslinked acrylic or crosslinked vinyl acetate/ethylene adhesive.
Claims10
In a process forming a laminate suited for use in preparing disposable absorbent products by
- depositing particulate polymeric absorbents onto a first nonwoven fibrous web, the fibers bonded with a polymeric resin;
- placing a second substrate over the particulate polymeric absorbent and thereby forming a laminate trapping the polymeric absorbent between said first nonwoven fibrous web and said substrate;
- passing the laminate having the polymeric absorbent trapped between the first nonwoven web and second substrate through pressure roll means for imparting indentations in the laminate;
- and then,
- adhesively bonding the first nonwoven web and second substrates at a plurality of points thereby forming discrete regions within the laminate and thus fixing a portion of the polymeric absorbent within said regions,
- the improvement which comprises:
- adhesively bonding the first nonwoven fibrous web to said second substrate solely by means of the pressure supplied by said roller means and effecting adhesion through the polymeric resin within the web and without the addition of water or heat.
In a C-fold e-fold process for forming a laminate suited for use in preparing disposable absorbent products which comprises:
- depositing particulate polymeric absorbent onto a first nonwoven fibrous web, having fibers bonded with a crosslinked polymeric resin;
- folding the side portions of the nonwoven web inwardly toward the center or longitudinal axis of the web in overlapping manner process thereby forming a laminate trapping the polymeric absorbent within the fold of said nonwoven fibrous web;
- passing the laminate having the polymeric absorbent trapped within the fold of the nonwoven web through a pressure roller for defining imparting indentations in the laminate;
- and then,
- adhesively bonding the thus formed laminate formed from the first nonwoven web at a plurality of points thereby forming discrete, sealed regions within the laminate and thus fixing a portion of the polymeric absorbent within said regions,
- the improvement which comprises:
- adhesively bonding the laminate solely by means of the pressure supplied by said pressure roller and effecting said adhesive bonding through the crosslinked polymeric resin in the nonwoven web without the addition of water or heat.
Dependencies are inferred from the claim text.