Adhesive formulation and creping methods using same

Patent metadata

Field	Value
Publication number	US-9976259-B2
Application number	US-201414561235-A
Country	US
Kind code	B2
Filing date	Dec 5, 2014
Priority date	Dec 10, 2013
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A formulation useful as a creping adhesive formulation or Yankee dryer coating composition is described. Methods of creping using the formulation are also described.

First claim

What is claimed is:

1. An adhesive formulation comprising:
a) at least one alkoxylated starch;
b)
i) at least one resin,
ii) at least one release aid, and
iii) at least one modifier, and

c) water,
wherein:
said resin is different from a) and said resin is present and is at least one of polyamide epichlorohydrin polymer (PAE), poly(amidoamine) epichlorohydrin polymer (PARE), or any combinations thereof; and
the adhesive formulation is capable of being sprayed through a Yankee dryer spray nozzle.

2. The formulation of claim 1 , wherein said alkoxylated starch is a non-ionic alkoxylated starch in aqueous soluble/dispersible liquid form.

3. The formulation of claim 1 , wherein said alkoxylated starch is a C1-C10 alkoxylated starch.

4. The formulation of claim 1 , wherein said alkoxylated starch is ethoxylated starch, propoxylated starch, or any combinations thereof.

5. The formulation of claim 1 , wherein said alkoxylated starch is present in an amount of from 30 wt % to 60 wt %, said resin is present in an amount of from 50 wt % to 1 wt %, said release aid is present in an amount of from 1 wt % to about 20 wt %, said modifier is present in an amount of from 1 wt % to about 20 wt %, and said water is present in an amount of from 1 wt % to 69 wt %, wherein said weight percents are based on the total weight percent of the formulation.

6. The formulation of claim 1 , wherein the starch of said alkoxylated starch is waxy maize starch, dent corn starch, tapioca starch, potato starch, or any combinations thereof.

7. The formulation of claim 1 , wherein said alkoxylated starch and said resin are present in a ratio of 1:10 to 10:1, on a weight/weight basis.

8. The formulation of claim 1 , wherein said release aid comprises an oil-based formulation comprising at least one vegetable oil, at least one lecithin, at least one dispersant/emulsifier, and said modifier comprises glycerine.

9. A process for creping a fiber web, comprising:
providing a rotating cylindrical dryer, including a dryer surface,
applying a formulation comprising the 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.

10. The process of claim 9 , 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.

11. The process of claim 9 , wherein said 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 %.

12. The process of claim 9 , wherein said formulation comprises 0.5 wt % to 10 wt % alkoxylated starch, and water is present in the formulation in an amount of from 98 wt % to 97 wt %.

13. The process of claim 9 , wherein the formulation comprises alkoxylated starch that is a C1-C10 alkoxylated starch.

14. The process of claim 9 , wherein said alkoxylated starch and said resin are present in said formulation in a ratio of 1:10 to 10:1, on a weight/weight basis.

15. The process of claim 9 , wherein the formulation is in the absence of polyvinyl alcohol.

16. The process of claim 9 , 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 the adhesive formulation before contacted with the fiber web.

17. The process of claim 9 , wherein said fiber web comprises pulp obtained from recycled paper.

18. The process of claim 9 , wherein said 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.

19. A process of making a creped fiber web, comprising:
applying a formulation comprising the 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.

Assignees

• Buckman Laboratories Int Inc

Inventors

• Tan Jian
• Glover Daniel E
• Covarrubias Rosa

Classifications

• C09J103/08 Primary

  Ethers · CPC title

• D21H17/72

  of organic material · CPC title

• C09J11/08

  Macromolecular additives · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• D21H17/55

  Polyamides; Polyaminoamides; Polyester-amides · CPC title