Claims
- 1. A blister pack laminate, comprising:
a substrate for providing a base layer, a tear-resistant polymer layer applied to said substrate for providing child resistance, and a heat seal polymer layer applied to said tear-resistant polymer.
- 2. The laminate of claim 1, wherein said substrate is paperboard.
- 3. The laminate of claim 1, wherein said tear-resistant polymer is polyamide, polyester, polyurethane or block copolymer.
- 4. The laminate of claim 1, wherein said heat seal polymer layer is EVA, EMA, ionomers or acrylic copolymers, or acrylate copolymers.
- 5. The laminate of claim 1, wherein said heat seal polymer layer has anti-blocking agents to reduce the tackiness of the heat seal polymer layer.
- 6. The laminate of claim 5, wherein said anti-blocking agents comprise calcium carbonate, talc or silica.
- 7. The laminate of claim 1, further comprising a clay coating applied to said substrate on a side opposite said tear-resistant polymer layer.
- 8. The laminate of claim 1, further comprising a tie layer between said substrate and said tear-resistant polymer layer.
- 9. The laminate of claim 1, further comprising a tie layer between said tear-resistant layer and said heat seal polymer layer.
- 10. The laminate of claim 1, further comprising a layer of adhesive primer between said substrate and tear-resistant polymer layer.
- 11. The laminate of claim 10, wherein said adhesive primer is a discontinuous layer.
- 12. The laminate of claim 10, wherein said adhesive primer is applied with a nip roll.
- 13. The laminate of claim 10, wherein said adhesive primer is polyethylene amine.
- 14. The laminate of claim 1, further comprising a layer of adhesion inhibitor between said substrate and tear-resistant polymer layer.
- 15. The laminate of claim 14, wherein said adhesion inhibitor is a discontinuous layer.
- 16. The laminate of claim 14, wherein said adhesion inhibitor is applied with a nip roll.
- 17. The laminate of claim 14, wherein said adhesion inhibitor comprises silicone.
- 18. A blister pack laminate, comprising:
a substrate for providing a base layer, a tear-resistant polymer layer blended with a heat seal polymer and applied to said substrate for providing both a child resistance and heat sealability.
- 19. The laminate of claim 18, wherein said tear-resistant polymer is a polymer film laminated to the paperboard substrate.
- 20. The laminate of claim 19, wherein the polymer film is an oriented film.
- 21. A method of making a packaging substrate, comprising
providing a substrate, applying a tear resistant polymer onto said substrate for providing child resistance, and applying a heat seal polymer onto said tear resistant polymer.
- 22. The method of claim 21, further comprising
applying said tear resistant polymer and heat seal polymer by extrusion.
- 23. The method of claim 21, further comprising
applying a tie layer between said tear resistant layer and said heat seal layer.
- 24. The method of claim 21, further comprising
applying a clay coating to a surface of substrate opposite to the tear resistant polymer.
- 25. The method of claim 21, further comprising
applying one of an adhesion primer or adhesion inhibitor between said substrate and said tear resistant polymer.
- 26. The method of claim 25, further comprising
applying said adhesion primer or adhesion inhibitor in a discontinuous layer.
- 27. The method of claim 25, further comprising
applying said adhesion primer or adhesion inhibitor with a nip roll.
Parent Case Info
[0001] This application claims the benefit of provisional application No. 60/352,853, filed Feb. 1, 2002.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60352853 |
Feb 2002 |
US |