High strength and high elongation wipes
View Patent ↗The present invention provides high strength nonwoven wipe materials and the process of making the materials. The high strength nonwoven wipe materials contain cellulosic fibers, synthetic fibers, or mixtures thereof, with bicomponent fibers and optionally, a binder. The present invention provides a high strength, high elongation, reduced stiffness nonwoven wipe material with superior tensile strength.
1. A high strength nonwoven wipe material comprising:
(A) from about 45 to about 95 weight percent matrix fibers selected from the group consisting of cellulosic fibers, synthetic fibers, and a mixture of cellulosic fibers and synthetic fibers;
(B) from about 5 to about 55 weight percent bicomponent fiber, wherein the bicomponent fiber has a length of from about 3 mm to about 36 mm; and
(C) from about 0 to about 15 weight percent binder, wherein the weight percentages are based on the total weight of the material, and wherein the material has
(D) a basis weight of from about 40 gsm to about 100 gsm;
(E) a density of from about 0.03 to about 0.15 g/cc;
(F) a CDW tensile strength of about 90 g/cm or greater and
(G) a CDW elongation percentage of about 15% to about 100%,
wherein the material comprises two or more strata, wherein the material has two outer strata and one or more inner strata and the weight percent bicomponent fiber of the inner stratum or strata is greater than the weight percent bicomponent fiber in the outer strata.
2. The material of claim 1 , wherein the bicomponent fibers have a length of about 6 mm or greater.
3. The material of claim 2 , wherein the bicomponent fibers have a length of about 8 mm or greater.
4. The material of claim 3 , wherein the bicomponent fibers have a length of about 10 mm or greater.
5. The material of claim 4 , wherein the bicomponent fibers have a length of about 12 mm or greater.
6. The material of claim 1 , wherein the material has a CDW tensile strength of about 100 g/cm or greater.
7. The material of claim 6 , wherein the material has a CDW tensile strength of about 147 g/cm or greater.
8. The material of claim 1 , wherein the material has been produced by an airlaid process.
9. The material of claim 1 , wherein the bicomponent fiber has a partially drawn core.
10. The high strength multistrata nonwoven wipe material of claim 1 , wherein the material comprises at least one stratum comprising from about 60 weight percent to about 100 weight percent bicomponent fibers, and wherein the composition of any one stratum is different from at least one adjacent stratum.
11. The material of claim 1 , wherein the material has two outer strata and one or more inner strata, wherein the inner strata comprises bicomponent fibers and matrix fibers.
12. The high strength multistrata nonwoven wipe material of claim 1 , wherein the material comprises at least one stratum comprising from about 5 weight percent to about 55 weight percent bicomponent fibers, and wherein the composition of any one stratum is different from at least one adjacent stratum.