High strength dimensionally stable core

Title: High strength dimensionally stable core

Related Patent Categories: Paper Making And Fiber Liberation, Processes And Products, Non-fiber Additive

Brief Patent Description - Full Patent Description - Patent Claims

The Patent Description & Claims data below is from USPTO Patent Application 20060021725, High strength dimensionally stable core.

1. Paperboard having improved resistance to moisture migration, comprises a paperboard furnish, 5-60 lbs of alum per ton of furnish, 3-40 lbs of size per ton of furnish, and 16-50 lbs of cationic starch per ton of furnish.

2. Paperboard as in claim 1, wherein said furnish comprises 25-70 percent doubleliner Kraft, 25-70% recycled paperboard containers, and 30-50% core waste.

3. Paperboard as in claim 2, having a freeness of 150-270 csf.

4. Paperboard as in claim 1 further comprising 2-8 lbs of dry strength agent per ton of furnish.

5. Paperboard as in claim 1, further comprising 0.2-1. lb of microparticle silica per ton of furnish.

6. Paperboard having improved strength and resistance to moisture migration, comprises a paperboard furnish, 4-40 lbs of alum per ton of furnish, 3-12 lbs of size per ton of furnish, and 30-40 lbs of cationic starch per ton of furnish.

7. Paperboard as in claim 6, wherein said furnish comprises 25-70 percent doubleliner Kraft, 25-70% recycled paperboard containers, and 30-50% core waste.

8. Paperboard as in claim 6, the paperboard having a water absorption of less than 400 cgs.

9. Paperboard as in claim 6 further comprising 2-8 lbs of dry strength agent per ton of furnish.

10. Paperboard as in claim 6, further comprising 0.2-1. lb of microparticle silica per ton of furnish.

11. Paperboard as in claim 9, wherein said alum is about 4-12 lbs per ton of furnish.

12. A high strength, dimensional stable paperboard core, comprising a plurality of spirally wound paperboard plies, said paperboard comprising a paperboard furnish, 5-60 lbs of alum per ton of furnish, 3-40 lbs of size per ton of furnish, and 16-50 lbs of cationic starch per ton of furnish.

13. A core as in claim 12, wherein said paperboard further comprises 2-8 lbs of dry strength agent per ton of furnish.

14. A core as in claim 12 wherein said paperboard further comprises 0.2-1. lb of microparticle silica per ton of furnish.

15. A high strength, dimensional stable paperboard core, comprising a plurality of spirally wound paperboard plies, said paperboard comprising a paperboard furnish comprised of 25-70 percent doubleliner Kraft, 25-70% recycled paperboard containers and 30-50% core waste; 5-60 lbs of alum per ton of furnish; 3-40 lbs of size per ton of furnish; and 16-50 lbs of cationic starch per ton of furnish; said paperboard having a water absorption of less than 400 cgs.

Brief Patent Description - Full Patent Description - Patent Claims

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