High strength and high elongation wipe
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 multistrata 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) optionally, from 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, and
(F) a CDW tensile strength of about 252 g/cm or greater, and wherein the material comprises two or more strata, and has 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, and wherein the material has two outer strata and one or more inner strata and the weight percent bicomponent fiber of one inner stratum is from about 70 weight percent to about 100 weight percent bicomponent fiber based on the total weight of the one inner stratum.
2. The material of claim 1 , wherein the material has two outer strata and one or more inner strata and the weight percent bicomponent fiber of one inner stratum is from about 70 weight percent to about 95 weight percent bicomponent fiber based on the total weight of the one inner stratum.
3. The material of claim 1 , wherein the material has two outer strata and one or more inner strata and the weight percent bicomponent fiber of one inner stratum is from about 75 weight percent to about 95 weight percent bicomponent fiber based on the total weight of the one inner stratum.
4. The material of claim 1 , wherein the material has two outer strata and one or more inner strata and the weight percent bicomponent fiber of one inner stratum is from about 80 weight percent to about 90 weight percent bicomponent fiber based on the total weight of the one inner stratum.
5. The material of claim 1 , wherein the material has two outer strata and one or more inner strata and the weight percent bicomponent fiber of one inner stratum is from about 90 weight percent to about 100 weight percent bicomponent fiber based on the total weight of the one inner stratum.
6. A high strength multistrata 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) optionally, from 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, and
(F) a CDW tensile strength of about 252 g/cm or greater, and
wherein the material comprises two or more strata, and has 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, and wherein the material has two outer strata and one or more inner strata and the weight percent bicomponent fiber of one outer stratum is from about 70 weight percent to about 100 weight percent bicomponent fiber based on the total weight of the outer stratum.
7. The material of claim 1 , wherein the bicomponent fibers have a length of about 6 mm or greater.
8. The material claim 7 , wherein the bicomponent fibers have a length of about 8 mm or greater.
9. The material claim 8 , wherein the bicomponent fibers have a length of about 10 mm or greater.
10. The material of claim 9 , wherein the bicomponent fibers have a length of about 12 mm or greater.
11. The material of claim 1 , wherein the CDW tensile strength of the nonwoven material is equal to about 394 g/cm or greater.
12. The material of claim 11 , wherein the CDW tensile strength of the nonwoven material is equal to about 591 g/cm or greater.
13. The material of claim 12 , wherein the CDW tensile strength of the nonwoven material is equal to about 787 g/cm or greater.
14. The material of claim 1 , wherein the material has been produced by an airlaid process.
15. The material of claim 1 , wherein the bicomponent fiber has a partially drawn core.