Corrugating adhesives for bonding coated papers and methods for bonding coated papers

• US 20040102546A1
• Filed: 11/22/2002
• Published: 05/27/2004
• Est. Priority Date: 11/22/2002
• Status: Abandoned Application

• Current Assignee: Corn Products International Incorporated (Ingredion Incorporated)
• Original Assignee: Corn Products International Incorporated (Ingredion Incorporated)
• Inventors: Linder, James, Turner, Bryan, Skuratowicz, Roman
• Application Number:
  US10/302,111
• Publication Number:
  US 20040102546A1
• Time in Patent Office: Days
• US Class Current: 524/47
• CPC Class Codes: B31F 1/2818 Glue application specially adapted therefor
• CPC Class Codes: Y10T 156/1025 to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact
• CPC Class Codes: Y10T 428/24149 Honeycomb-like

Abstract

A corrugating adhesive that improves the bonding of coated papers, including latex coated medium and linerboards. The corrugating adhesive may comprise a hydrocolloid portion of the adhesive that improves tack and bonding and buffers and absorbs caustic in the adhesive allowing higher caustic in the adhesive formula without premature gelling of the secondary starch portion. Also, methods for making waterproof or water resistant corrugated board from corrugated media and paper liner.

Claims

1. A corrugating adhesive for bonding coated media or liner comprising from about 15% by weight to about 45% by weight starch, up to about 20% by weight hydrocolloid, about 0.5% to about 5% caustic by weight of the starch on a dry basis, up to about 2% by weight boron containing compound, about 0.5% by weight to about 5% by weight waterproofing resin or water resistant resin and about 50% by weight to about 80% by weight water.

2. The corrugating adhesive of claim 1 wherein the amount of caustic is about 2% to about 4% by weight of the starch on a dry basis.

3. The corrugating adhesive of claim 1 wherein the amount of hydrocolloid is about 1% by weight to about 15% by weight.

4. The corrugating adhesive of claim 3 wherein the amount of hydrocolloid is about 2% by weight to about 8% by weight.

5. The corrugating adhesive of claim 1 wherein the amount of boron containing compound is about 0.3% by weight to about 0.8% by weight.

6. The corrugating adhesive of claim 1 having a pH of between about 10 and about 14.

7. The corrugating adhesive of claim 1 of the carrier or carrier no-carrier type.

8. The corrugating adhesive of claim 1 wherein the starch is selected from the group consisting of corn, wheat, barley, tapioca, potato and combinations thereof.

9. The corrugating adhesive of claim 1 wherein the starch is modified starch.

10. The corrugating adhesive of claim 9 wherein the modified starch is selected from the group consisting of high amylose corn starch, waxy corn starch, acid thinned starch, etherified starch, esterified starch, hypochlorite-oxidized starch and cross-bonded starch.

11. The corrugating adhesive of claim 1 wherein the hydrocolloid is selected from the group consisting of hemicellulose, gum arabic, xanthan gum, gum karaya, tragacanth, sodium alginates, carageenan, Guar gum, Locus bean gum, tara, pectins, gellan, cellulose derivative, microcrystalline cellulose or combinations thereof.

12. The corrugating adhesive of claim 11 wherein the hemicellulose has a cellulose fraction.

13. The corrugating adhesive of claim 11 wherein the hemicellulose is from in-situ extraction of corn fiber.

14. The corrugating adhesive of claim 11 wherein the cellulose derivative is selected from the group of carboxymethyl cellulose, methyl cellulose and ethyl cellulose.

15. The corrugating adhesive of claim 1 wherein the caustic comprises alkali metal hydroxides.

16. The corrugating adhesive of claim 1 wherein the boron containing compound is selected from the group consisting of boric acid and borax.

17. The corrugating adhesive of claim 1 wherein the waterproofing resin is a condensation product from the reaction of a ketone and an alkdehyde compound.

18. The corrugating adhesive of claim 1 further comprising additives selected from the group consisting of latexes, polyvinyl alcohol and polyamides.

19. The corrugating adhesive of claim 18 wherein the latexes are selected from the group consisting of acrylates and copolymers of styrene.

20. A method of making waterproof or chemically resistant corrugated board comprising joining by bonding a coated or uncoated corrugated board to at least one water proof or chemically resistant liner using the corrugating adhesive of claim 1.

21. The method of claim 20 wherein the corrugating adhesive comprises a carrier and the hydrocolloid portion of the carrier absorbs caustic in the adhesive during bonding.

22. The corrugated board made by the method of claim 20.

23. An improved method for making coated single-face corrugated board having a coated or uncoated corrugated medium with a first side and a second side each with a plurality of flutes comprising tips and a coated paper liner wherein the improvement comprises applying an adhesive having from about 15% by weight to about 45% by weight starch, up to about 20% by weight hydrocolloid, about 0.5% to about 5% caustic by weight of the starch on a dry basis, up to about 2% by weight boron containing compound, about 0.5% by weight to about 5% by weight waterproofing resin or water resistant resin and about 50% by weight to about 80% by weight water onto the tips of the flutes on first side of the corrugated medium.

24. The method of claim 23 wherein the coated paper liner comprises latex coating.

26. The method of claim 23 wherein the coated paper liner comprises a latex coating.

25. An improved method for making coated double-face corrugated board having a coated or uncoated corrugated medium with a first side and a second side each with a plurality of flutes comprising tips and coated paper liners wherein the improvement comprises applying an adhesive having from about 15% by weight to about 45% by weight starch, up to about 20% by weight hydrocolloid, about 0.5% to about 5% caustic by weight of the starch on a dry basis, up to about 2% by weight boron containing compound, about 0.5% by weight to about 5% by weight waterproofing resin or water resistant resin and about 50% by weight to about 80% by weight water onto the tips of the flutes on the first side of the corrugated medium and on the tips of the flutes on the second side of the corrugated medium.