Hydroentangled fabric having structured surfaces
AssigneePolymer Group, Inc.
InventorMou C. Ngai
Life of this patent
Estimating the term…
Abstract
A composite non-woven fabric has two outer non-woven layers with structured surfaces that are efficient at wiping solid or semi-solid matter, with a center non-woven layer that is substantially impermeable to the passage of solid or semi-solid matter. The fabric of the invention thus provides efficient wiping ability for solid and semi-solid matter in combination with a sanitary quality that prevents passage of such matter through the fabric. The fabric of the invention may find particular utility as a wipe. A method of making a composite non-woven fabric includes the general steps of forming a first and second hydroentangled non-woven webs with structured surfaces, and laminating the first and second webs to a central non-woven web that is substantially impermeable to passage of solid and semi-solid matter.
Claims10
A method of making a non-woven fabric composite, comprising the steps of:
- a) forming a first non-woven web by hydroentangling staple fibers, said first web having a structured surface, having a basis weight of at least 10 gm/m2;
- b) forming a second non-woven web;
- said second web substantially impervious to passage of solids and semi-solids;
- having a basis weight of at least 10 gm/m2;
- and
- c) laminating said first and second webs to one another by entangling with water jets to form a composite non-woven fabric.
A method of making a non-woven composite fabric, comprising the steps of:
- a) forming a first non-woven web by hydroentangling staple fibers chosen from the group consisting of cellulosic rayons, polyolefins, polyesters, and mixtures thereof;
- said first web having a structured surface, having a basis weight of between about 20-40 gm/m2;
- b) forming a second non-woven web comprised of fibers chosen from the group consisting of cellulosic rayons, polyolefins, polyesters, and mixtures thereof;
- said second web substantially impenetrable to solids and semi-solids, having a basis weight of between about 20-40 gm/m2;
- said first non-woven web and said second non-woven web having a wiping efficiency ratio of at least 1.25:1 (first web:second web) when tested with solid to semi-solid matter;
- c) forming a third non-woven web by hydroentangling staple fibers chosen from the group consisting of cellulosic rayons, polyolefins, polyesters, and mixtures thereof;
- said third web having a structured surface, having a wiping efficiency of at least 70% when tested with simulated fecal matter, having a basis weight of between about 20-40 gm/m2;
- said third non-woven web and said second non-woven web having a wiping efficiency ratio of at least 1.25:1 (third web:second web) when tested with solid to semi-solid matter;
- and
- d) laminating said first, second, and third webs together by entangling said respective webs with water jets, said second web sandwiched between said first and third webs.
Dependencies are inferred from the claim text.