Granted Patent B2

US 8,067,087 · App. 11/222,672 · Granted Nov 29, 2011

Abstract

Claims (15)

1. A heat seal adhesive paper product comprising a paper substrate and a layer of heat activatable adhesive on a first side of the paper substrate and a layer of heat activatable adhesive on the second side of the paper substrate, wherein the heat activatable adhesive comprises a result of applying an aqueous polymer dispersion to the paper substrate to form a coated paper substrate and drying the coated paper substrate by contacting the coated paper substrate with contact drying rolls, and the aqueous polymer dispersion comprises a polymer component having a melting temperature (T m ) greater than about 240° F. and a glass transition temperature (T g ) greater than about 120° F., wherein the polymer component comprises at least one of polyamide, copolyamide, polyester, or copolyester.

2. A heat seal adhesive paper product according to claim 1 , wherein the heat seal adhesive paper product exhibits a heat bond activation temperature when contacted with a hot roll or platen having a surface temperature greater than about 250° F. for at least about 0.05 second at a pressure of at least about 1 psig.

3. A heat seal adhesive paper product according to claim 1 , wherein the heat activatable adhesive is provided on one side of the paper substrate at a solids weight of about 0.5 lb/3,000 ft 2 to about 15 lb/3,000 ft 2 .

4. A heat seal adhesive paper product according to claim 1 , wherein the heat activatable adhesive is provided on one side of the paper substrate at a solids weight of about 1 lb/3,000 ft 2 to about 8 lb/3,000 ft 2 .

5. A heat seal adhesive paper product according to claim 1 , wherein the paper substrate comprises paper having a basis weight of about 10 lbs./3000 ft 2 to about 150 lbs./3000 ft 2 .

6. A heat seal adhesive paper product according to claim 1 , wherein the heat activatable paper product is provided in the form of a roll.

7. A heat seal adhesive paper product according to claim 1 , wherein the heat activatable adhesive is provided on the first side of the paper substrate at a solids weight of about 0.5 lb/3,000 ft 2 to about 15 lb/3,000 ft 2 , and is provided on the second side of the paper substrate at a solids weight of about 0.5 lb/3,000 ft 2 to about 15 lb/3,000 ft 2 .

8. A heat seal adhesive paper product according to claim 1 , wherein the polymer component comprises polyester.

9. A heat seal adhesive paper product according to claim 8 , wherein the polymer component has a glass transition temperature greater than about 125° F.

10. A heat seal adhesive paper product according to claim 1 , wherein the paper substrate comprises a paper having a basis weight of about 15 lb/3000 ft 2 to about 35 lb/3000 ft 2 .

11. A heat seal adhesive paper product according to claim 1 , wherein the paper substrate comprises a paper having a basis weight of about 30 lb/3000 ft 2 to about 50 lb/3000 ft 2 .

12. A heat seal adhesive paper product according to claim 1 , wherein the paper substrate comprises a paper having a basis weight of about 40 lb/3000 ft 2 to about 60 lb/3000 ft 2 .

13. A heat seal adhesive paper product according to claim 1 , wherein the paper substrate comprises a paper having a basis weight of about 15 lb/3000 ft 2 to about 100 lb/3000 ft 2 .

14. A heat seal adhesive paper product according to claim 1 , wherein the heat activatable adhesive is kept below the heat bond activation temperature during drying the coated paper by contacting the coated paper substrate with contact drying rolls.

15. A heat seal adhesive paper product according to claim 1 , wherein the polymer component comprises a linear polyester.

Assignments (11)