Dispersible hydroentangled basesheet with triggerable binder

Patent metadata

Field	Value
Publication number	US-9320395-B2
Application number	US-201514643545-A
Country	US
Kind code	B2
Filing date	Mar 10, 2015
Priority date	Jan 31, 2014
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

The present disclosure is generally directed to a dispersible moist wipe comprising hydroentangled fibers and a binder composition. The moist wipe demonstrates high initial wet strength while maintaining effective dispersion in an aqueous environment. The moist wipe has potential application as a flushable surface cleaning product and/or a flushable cleansing cloth.

First claim

What is claimed is:

1. A dispersible moist wipe comprising:
entangled fibers comprising regenerated fibers in an amount of about 5 to about 30 percent by weight and natural fibers in an amount of about 70 to about 95 percent by weight; and,
from about 0.5 gsm to about 5 gsm of a binder composition, wherein the binder composition comprises a composition having the structure:

wherein x=1 to about 15 mole percent; y=about 60 to about 99 mole percent; and z=0 to about 30 mole percent; Q is selected from C 1 -C 4 alkyl ammonium, quaternary C 1 -C 4 alkyl ammonium and benzyl ammonium; Z is selected from —O—, —COO—, —OOC—, —CONH—, and —NHCO—; R 1 , R 2 , R 3 are independently selected from hydrogen and methyl; R 4 is C 1 -C 4 alkyl; R 5 is selected from hydrogen, methyl, ethyl, butyl, ethylhexyl, decyl, dodecyl, hydroxyethyl, hydroxypropyl, polyoxyethylene, and polyoxypropylene;
wherein the moist wipe has a geometric mean tensile (GMT) wet strength of at least about 300 g/in and a GMT soak wet strength of less than about 180 g/in.

2. The dispersible moist wipe of claim 1 , wherein the moist wipe comprises from about 1.2 gsm to about 2.6 gsm of the binder composition.

3. The dispersible moist wipe of claim 1 , wherein the moist wipe has a GMT wet strength of at least about 500 g/in.

4. The dispersible moist wipe of claim 1 , wherein the moist wipe has a GMT wet strength of from about 300 g/in to about 900 g/in and a GMT soak wet strength of from about 130 g/in to about 175 g/in.

5. A dispersible moist wipe comprising:
entangled fibers comprising regenerated fibers in an amount of about 5 to about 30 percent by weight and natural fibers in an amount of about 70 to about 95 percent by weight; and,
from about 0.5 gsm to about 5 gsm of a binder composition, wherein the binder composition comprises the polymerization product of a vinyl-functional cationic monomer and one or more hydrophobic vinyl monomers with alkyl side chains of 1 to 4 carbon atoms;
wherein the moist wipe has a geometric mean tensile (GMT) wet strength of at least about 300 g/in and a GMT soak wet strength of less than about 180 g/in.

6. The dispersible moist wipe of claim 5 , wherein the vinyl-functional cationic monomer is selected from [2-(acryloxy)ethyl]dimethyl ammonium chloride, [2-(methacryloxy)ethyl]dimethyl ammonium chloride, [2-(acryloxy)ethyl]trimethyl ammonium chloride, [2-(methacryloxy)ethyl]trimethyl ammonium chloride, (3-acrylamidopropyl)trimethyl ammonium chloride, N,N-diallyldimethyl ammonium chloride, [2-(acryloxy)ethyl]dimethylbenzyl ammonium chloride, and [2-(methacryloxy)ethyl]dimethylbenzyl ammonium chloride.

7. The dispersible moist wipe of claim 5 , wherein the moist wipe comprises from about 1.2 gsm to about 2.6 gsm of the binder composition.

8. The dispersible moist wipe of claim 5 , wherein the moist wipe has a GMT wet strength of at least about 500 g/in.

9. The dispersible moist wipe of claim 5 , wherein the moist wipe has a GMT wet strength of from about 300 g/in to about 900 g/in and a GMT soak wet strength of from about 130 g/in to about 175 g/in.

10. A dispersible moist wipe comprising:
entangled fibers; and,
from about 0.5 gsm to about 5 gsm of a binder composition, wherein the binder composition comprises a composition having the structure:

wherein x=1 to about 15 mole percent; y=about 60 to about 99 mole percent; and z=0 to about 30 mole percent; Q is selected from C 1 -C 4 alkyl ammonium, quaternary C 1 -C 4 alkyl ammonium and benzyl ammonium; Z is selected from —O—, —COO—, —OOC—, —CONH—, and —NHCO—; R 1 , R 2 , R 3 are independently selected from hydrogen and methyl; R 4 is C 1 -C 4 alkyl; R 5 is selected from hydrogen, methyl, ethyl, butyl, ethylhexyl, decyl, dodecyl, hydroxyethyl, hydroxypropyl, polyoxyethylene, and polyoxypropylene;

wherein the moist wipe has a geometric mean tensile (GMT) wet strength of at least about 300 g/in and a GMT soak wet strength of less than about 180 g/in.

11. The dispersible moist wipe of claim 10 wherein the fibers comprise a mixture of regenerated fibers having a length in the range of about 4 mm to about 15 mm and natural fibers having a length greater than about 1 mm.

12. The dispersible moist wipe of claim 10 , wherein the moist wipe comprises from about 1.2 gsm to about 2.6 gsm of the binder composition.

13. The dispersible moist wipe of claim 10 , wherein the moist wipe has a GMT wet strength of at least about 500 g/in.

14. The dispersible moist wipe of claim 10 , wherein the moist wipe has a GMT wet strength of from about 300 g/in to about 900 g/in and a GMT soak wet strength of from about 130 g/in to about 175 g/in.

Assignees

• Kimberly Clark Co

Inventors

• Zwick Kenneth John
• Vogel Nathan John
• Lee Wanduk
• Baker Joseph Kenneth
• Ackroyd Colin

Classifications

• D21H17/44

  cationic · CPC title

• D21H23/24

  during paper manufacture · CPC title

• D21H17/45

  Nitrogen-containing groups · CPC title

• Y10T442/689

  Hydroentangled nonwoven fabric · CPC title

• Y10T442/698

  Containing polymeric and natural strand or fiber materials · CPC title