CORRUGATING ADHESIVES FOR BONDING COATED PAPERS AND METHODS FOR BONDING COATED PAPERS

• US 20070149657A1
• Filed: 11/29/2006
• Published: 06/28/2007
• 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: Skuratowicz, Roman, Linder, James, Turner, Bryan
• Application Number:
  US11/564,349
• Publication Number:
  US 20070149657A1
• Time in Patent Office: Days
• US Class Current: 524/47
• CPC Class Codes: B32B 2255/12 on paper layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 29/005 next to another layer of paper or cardboard layer
• CPC Class Codes: B32B 29/06 specially treated, e.g. surfaced, parchmentised
• CPC Class Codes: B32B 29/08 Corrugated paper or cardboard
• CPC Class Codes: B32B 3/28 characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C08K 3/38 Boron-containing compounds
• CPC Class Codes: C08L 1/02 Cellulose; Modified cellulose
• CPC Class Codes: C08L 2666/26 Natural polymers, natural resins or derivatives thereof according to C08L1/00 - C08L5/00, C08L89/00, C08L93/00, C08L97/00 or C08L99/00
• CPC Class Codes: C09J 103/02 Starch; Degradation products thereof, e.g. dextrin

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 starch, hydrocolloid, caustic, waterproofing resin or water resistant resin and water wherein the concentration of caustic in the corrugating adhesive is defined by the equation (Amount of Caustic−

C_Critical×

Amount of Starch)/Amount of Water and C_Critical is greater than 1.6.

2. The corrugating adhesive of claim 1 wherein the C_Critical is greater than 1.6 to about 2.5.

3. The corrugating adhesive of claim 1 comprising from about 15% to about 45% by weight starch, about 1% to about 40% by weight hydrocolloid, about 0.75% to about 2.25% by weight caustic, up to about 2% by weight boron containing compound, about 0.5% to about 5% by weight waterproofing resin or water resistant resin and about 50% to about 80% by weight water.

4. The corrugating adhesive of claim 3 wherein the hydrocolloid is hemicellulose and the amount of hemicellulose is from about 0.1% to about 4% by weight.

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

6. The corrugating adhesive of claim 3 wherein the amount of boron containing compound is about 0.3% to about 0.8% by weight.

7. The corrugating adhesive of claim 1 wherein the amount of caustic is greater than 1% by weight.

8. The corrugating adhesive of claim 7 wherein the amount of caustic is from about 1.25% to about 2.00% by weight.

9. The corrugating adhesive of claim 7 wherein the hydrocolloid is hemicellulose and the amount of hemicellulose is from about 4% to about 20% by weight.

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

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

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

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

14. The corrugating adhesive of claim 13 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.

15. 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.

16. The corrugating adhesive of claim 15 wherein the hemicellulose is from in-situ extraction of corn fiber.

17. The corrugating adhesive of claim 15 wherein the cellulose derivative is selected from the group of carboxymethyl cellulose, methyl cellulose and ethyl cellulose.

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

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

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