Modified creping adhesive formulation and creping methods using same

Patent metadata

Field	Value
Publication number	US-11053641-B2
Application number	US-201916358730-A
Country	US
Kind code	B2
Filing date	Mar 20, 2019
Priority date	Mar 22, 2018
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A modified creping adhesive formulation is described that includes at least one creping adhesive, and modifier, wherein the modifier is or includes an emulsion of polypropylene glycol, at least one quaternary ammonium compound, and at least one non-ionic surfactant. The present invention is directed to the modifier itself as well. Methods of creping using the formulation are also described.

First claim

What is claimed is:

1. A modified creping adhesive formulation comprising:
a. at least one creping adhesive, and
b. a modifier,
wherein said modifier comprises an emulsion of polypropylene glycol, at least one quaternary ammonium compound, and at least one non-ionic surfactant,
wherein said at least one quaternary ammonium compound either comprises i) an imidazoline derivative that is a reaction product of diethylene triamine and a fatty acid and further reacted with dimethyl sulfate, wherein the fatty acid is a tall oil fatty acid, or ii) a dimethyl ditallow ammonium chloride, a dimethyl benzyl ammonium chloride, or any combination thereof.

2. The modified creping adhesive formulation of claim 1 , wherein said at least one non-ionic surfactant consists of two different non-ionic surfactants.

3. The modified creping adhesive formulation of claim 1 , wherein said modifier further comprises water.

4. The modified creping adhesive formulation of claim 1 , wherein said at least one creping adhesive comprises polyvinyl alcohol.

5. The modified creping adhesive formulation of claim 1 , wherein said polypropylene glycol comprises at least one polypropylene glycol having an average molecular weight of from 400 to 10,000 daltons.

6. The modified creping adhesive formulation of claim 1 , wherein said polypropylene glycol comprises at least one polypropylene glycol having an average molecular weight of from 1,000 to 3,000 daltons.

7. The modified creping adhesive formulation of claim 1 , wherein said at least one non-ionic surfactant is polyalkylene glycol monobutyl ether.

8. The modified creping adhesive formulation of claim 1 , wherein said at least one non-ionic surfactant is an alkyl EO-PO copolymer.

9. The modified creping adhesive formulation of claim 1 , wherein said at least one non-ionic surfactant is an EO-PO block copolymer.

10. The modified creping adhesive formulation of claim 1 , wherein said at least one non-ionic surfactant is i) an alkyl EO-PO copolymer and ii) an EO-PO block copolymer, wherein i) and ii) are different from each other.

11. The modified creping adhesive formulation of claim 1 , wherein said at least one non-ionic surfactant is i) an alkyl EO-PO copolymer and ii) a poloxamer, wherein i) and ii) are different from each other.

12. The modified creping adhesive formulation of claim 1 , wherein said polypropylene glycol has an average molecular weight of from 400 to 10,000 daltons, said quaternary ammonium compound comprises imidazoline, said at least one non-ionic surfactant comprises i) an alkyl EO-PO copolymer and ii) an EO-PO block copolymer, wherein i) and ii) are different from each other.

13. The modified creping adhesive formulation of claim 1 , wherein said polypropylene glycol has an average molecular weight of from 400 to 10,000 daltons, said quaternary ammonium compound comprises imidazoline, said at least one non-ionic surfactant comprises i) an alkyl EO-PO copolymer and ii) an EO-PO block copolymer, wherein i) and ii) are different from each other, and wherein said creping adhesive comprises polyvinyl alcohol.

14. The modified creping adhesive formulation of claim 1 , wherein said polypropylene glycol is present in an amount of from 5 wt % to 20 wt %, said quaternary ammonium compound is present in an amount of from 1 wt % to 15 wt %, said at least one non-ionic surfactant is present in an amount of from 5 wt % to 15 wt %, and said modifier further comprising water in an amount of from 50 wt % to 90 wt %, all based on total weight of said modifier.

15. The modified creping adhesive formulation of claim 1 , wherein said creping adhesive is present in an amount of from 85 wt % to 99 wt % and said modifier is present in an amount of from 1 wt % to 5 wt %, based on total weight of said modified creping adhesive formulation.

16. The modified creping adhesive formulation of claim 1 , wherein said emulsion is a microemulsion with particle sizes of below 0.1 micron.

17. The modified creping adhesive formulation of claim 1 , wherein said emulsion is stable at a temperature of from −10 deg C. to 50 deg C.

18. A modifier for a creping adhesive formulation, said modifier comprises an emulsion of polypropylene glycol, at least one quaternary ammonium compound, and at least one non-ionic surfactant, wherein said at least one quaternary ammonium compound either comprises i) an imidazoline derivative that is a reaction product of diethylene triamine and a fatty acid and further reacted with dimethyl sulfate, wherein the fatty acid is a tall oil fatty acid, or ii) a dimethyl ditallow ammonium chloride, a dimethyl benzyl ammonium chloride, or any combination thereof.

19. A process for creping a fiber web, comprising:
providing a rotating cylindrical dryer, including a dryer surface, applying a formulation comprising the modified creping adhesive formulation of claim 1 to the dryer surface,
conveying a fiber web to the dryer surface,
drying the fiber web on said dryer surface to form a dried fiber web, and
creping the dried fiber web from the dryer surface.

20. The process of claim 19 , wherein coating film tack of the formulation increases by at least 1.5 times (1.5×) when moisture content of said fiber web decreases from about 50 wt % to about 30 wt % during said drying of said fiber web on said dryer surface, and then decreases by at least 1.5 times (1.5×) when moisture content of said fiber web decreases from about 30 wt % to about 10 wt % during said drying of said fiber web on said dryer surface.

21. The process of claim 19 , wherein said modified creping adhesive formulation has 0.5 wt % to 10 wt % total solids content, and water is present in the formulation in an amount of from 99.5 wt % to 90 wt %.

22. The process of claim 19 , wherein said creping adhesive at least one of polyvinyl alcohol, polyamide epichlorohydrin polymer (PAE), poly(amidoamine) epichlorohydrin polymer (PAAE), or any combinations thereof.

23. The process of claim 19 , further comprising predrying the fiber web using through-air drying before the fiber web is transferred to the dryer surface using a structured fabric to convey the web to the dryer surface, wherein at least one of the structured fabric and the dryer surface is precoated with said modified creping adhesive formulation before contacted with the fiber web.

24. The process of claim 19 , wherein said modified creping adhesive formulation is applied in an amount of from about 0.5 mg/m 2 of dryer surface to 40 mg/m 2 of dryer surface.

25. A process of making a creped fiber web, comprising:
applying a formulation comprising the modified creping adhesive formulation of claim 1 to a TAD fabric to provide a coated surface, wherein the TAD fabric is arranged in an endless loop such that the TAD fabric passes around a foraminous dryer roll of a through-air dryer (TAD),
transferring a fiber web to the coated surface of the TAD fabric;
conveying the coated TAD fabric with the fiber web carried thereon around the dryer roll with passing of heated air through the fiber web to provide a dried web without drying of the fiber web on a Yankee dryer, and
separating the dried web from the TAD fabric for collection of the dried web, wherein the dried web comprises at least one creped property.

26. The modifier of claim 18 , wherein said emulsion is a microemulsion with particle sizes of below 0.1 micron.

Assignees

• Buckman Laboratories Int Inc

Inventors

• Tan Jian
• Glover Daniel E

Classifications

• D21H17/72

  of organic material · CPC title

• D21H17/34

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09J11/08

  Macromolecular additives · CPC title

• C08K5/3445

  Five-membered rings · CPC title

• C09J11/06

  organic · CPC title