Porous Multilayer Articles and Methods of Making
OwnerJeremie Peyras-Carratte, Jean-Marie Coantinventors
Life of this patent
Estimating the term…
Abstract
Porous multilayer articles and methods of making are disclosed. Multicomponent polymeric fibers are introduced into a forming chamber and are deposited onto a first porous substrate. The multicomponent fibers are then bonded to each other to form a porous coherent web, and the porous coherent web is bonded to the first porous substrate, so as to form a porous multilayer article. The porous coherent web contains particles that are bonded to the multicomponent fibers of the web. The particles in the porous coherent web may be e.g. abrasive, absorbent, etc.
Claims20
A method of making a porous multilayer web, comprising:
- introducing discontinuous multicomponent polymeric fibers into a forming chamber;
- introducing particles into the forming chamber;
- mixing the multicomponent fibers and particles within the forming chamber;
- depositing the multicomponent fibers and particles onto a first porous web to form a porous, particle-containing fibrous mat atop the first porous web;
- and,
- exposing the porous, particle-containing fibrous mat to an elevated temperature to melt-bond at least some of the multicomponent fibers to each other and to melt-bond at least some of the multicomponent fibers to at least some of the particles, so as to produce a particle-containing, coherent porous web,
- wherein the elevated temperature also causes the particle-containing coherent porous web and the first porous web to melt-bond together to form a porous, multilayer web.
A porous multilayer article, comprising:
- a first porous nonwoven layer comprising polymeric fibers and abrasive particles bonded thereto;
- a second porous nonwoven layer comprising discontinuous multicomponent polymeric fibers at least some of which are melt-bonded to each other at least at some points of fiber contact, and comprising absorbent particles melt-bonded to at least some of the multicomponent fibers;
- wherein the first and second porous nonwoven layers are melt-bonded to each other.
Dependencies are inferred from the claim text.