Claims
- 1-13 (Cancelled)
- 14. A coextruded heat-sealable film structure, comprising:
(a) a core layer comprising a thermoplastic polymer, the core layer having a first side and a second side; (b) a functional layer on the first side of the core layer, wherein the functional layer is selected from the group consisting of a laminating layer, a printable layer, a laminating and a printable layer, and a sealable layer; (c) a heat-sealable layer on the second side of the core layer comprising (i) a thermoplastic polymer and (ii) a slip system comprising a silicone gum having a viscosity greater than one million centistokes present in amount from about 0.2 wt. % to about 2.0 wt. % of the heat-sealable layer and at least one antiblocking agent present in an amount from about 0.05 wt. % to about 0.5 wt. % of the heat-sealable layer; and (d) wherein the heat-sealable film structure has a force over forming collar value of less than 20 pounds and a hot slip value of less than 20 at 290° C.; (e) wherein the core layer has a polymeric matrix selected from the group consisting of a ethylene propylene copolymer, propylene butylene copolymer, and a high density polyethylene; and (f) wherein the core layer comprises a cavitating agent selected from the group consisting of polybutylene terephthalate, calcium carbonate, and blends thereof.
- 15. A laminate film structure comprising a first film laminated to a second film, wherein the first film is a heat-sealable film structure comprising:
(a) a core layer comprising a thermoplastic polymer, the core layer having a first side and a second side; (b) a functional layer on the first side of the core layer, wherein the functional layer is selected from the group consisting of a laminating layer, a printable layer, a laminating and a printable layer, and a sealable layer; (c) a heat-sealable layer on the second side of the core layer comprising (i) a thermoplastic polymer and (ii) a slip system comprising a silicone gum having a viscosity greater than one million centistokes present in amount from about 0.2 wt. % to about 2.0 wt. % of the heat-sealable layer and at least one antiblocking agent present in an amount from about 0.05 wt. % to about 0.5 wt. % of the heat-sealable layer; (d) wherein the heat-sealable film structure has a force over forming collar value of less 20 pounds and a hot slip value of less than 20 at 290° C.; and (e) wherein the second film is comprised of the same structure as the first film.
- 16. A laminate film structure comprising a first film laminated to a second film, wherein the first film is a heat-sealable film structure comprising:
(a) a core layer comprising a thermoplastic polymer, the core layer having a first side and a second side; (b) a functional layer on the first side of the core layer, wherein the functional layer is selected from the group consisting of a laminating layer, a printable layer, a laminating and a printable layer, and a sealable layer; (c) a heat-sealable layer on the second side of the core layer comprising (i) a thermoplastic polymer and (ii) a slip system comprising a silicone gum having a viscosity greater than one million centistokes present in amount from about 0.2 wt. % to about 2.0 wt. % of the heat-sealable layer and at least one antiblocking agent present in an amount from about 0.05 wt. % to about 0.5 wt. % of the heat-sealable layer; (d) wherein the heat-sealable film structure has a force over forming collar value of less 20 pounds and a hot slip value of less than 20 at 290° C.; and (e) wherein the core layer has a polymeric matrix selected from the group consisting of a propylene homopolymer, a propylene copolymer, and a polyethylene.
- 17. A laminate film structure comprising a first film laminated to a second film, wherein the first film is a heat-sealable film structure comprising:
(a) a core layer comprising a thermoplastic polymer, the core layer having a first side and a second side; (b) a functional layer on the first side of the core layer, wherein the functional layer is selected from the group consisting of a laminating layer, a printable layer, a laminating and a printable layer, and a sealable layer; (c) a heat-sealable layer on the second side of the core layer comprising (i) a thermoplastic polymer and (ii) a slip system comprising a silicone gum having a viscosity greater than one million centistokes present in amount from about 0.2 wt. % to about 2.0 wt. % of the heat-sealable layer and at least one antiblocking agent present in an amount from about 0.05 wt. % to about 0.5 wt. % of the heat-sealable layer; (d) wherein the heat-sealable film structure has a force over forming collar value of less 20 pounds and a hot slip value of less than 20 at 290° C.; and (e) wherein the antiblocking agent is a particulate antiblocking agent having an average particle size of from about 1 to about 5 μm.
- 18. A laminate film structure comprising a first film laminated to a second film, wherein the first film is a heat-sealable film structure comprising:
(a) a core layer comprising a thermoplastic polymer, the core layer having a first side and a second side; (b) a functional layer on the first side of the core layer, wherein the functional layer is selected from the group consisting of a laminating layer, a printable layer, a laminating and a printable layer, and a sealable layer; (c) a heat-sealable layer on the second side of the core layer comprising (i) a thermoplastic polymer and (ii) a slip system comprising a silicone gum having a viscosity greater than one million centistokes present in amount from about 0.2 wt. % to about 2.0 wt. % of the heat-sealable layer and at least one antiblocking agent present in an amount from about 0.05 wt. % to about 0.5 wt. % of the heat-sealable layer; (d) wherein the heat-sealable film structure has a force over forming collar value of less 20 pounds and a hot slip value of less than 20 at 290° C.; and (e) wherein the core layer has a polymeric matrix selected from the group consisting of an ethylene propylene copolymer, propylene butylene copolymer, and a high density polyethylene.
- 19. The laminate film structure of claim 16 wherein the silicone gum has a viscosity in the range of 10 to 20 million centistokes.
- 20. The laminate film structure of claim 16 wherein the core layer further comprises an additive selected from the group consisting of a natural hydrocarbon additive, a synthetic hydrocarbon additive, a cavitating agent, an antistatic agent, and mixtures thereof.
- 21. The laminate film structure of claim 16 wherein the functional layer further comprises at least one antiblock additive.
- 22. The laminate film structure of claim 16 wherein the surface of the functional layer is flame treated or corona treated and the surface of the heat-sealable layer is untreated.
- 23. The laminate film structure of claim 16 wherein the thermoplastic polymer of the heat-sealable layer is selected from the group consisting of an ethylene-propylene random copolymer, a propylene-butylene random copolymer, an ethylene-propylene-butylene terpolymer, a linear low density polyethylene, a low density polyethylene, a metallocene-catalyzed polyethylene, an ethylene vinyl acetate, an ethylene-methyl acrylate, an ionomer, and blends thereof and the functional layer has a polymeric matrix selected from the group consisting of a propylene polymer, an ethylene-propylene block copolymer, a high density polyethylene, an ethylene vinyl alcohol copolymer, an ethylene-propylene random copolymer, a propylene-butylene copolymer, an ethylene-propylene-butylene terpolymer, a medium density polyethylene, a linear low density polyethylene, an ethylene vinyl acetate, an ethylene-methyl acrylate, and blends thereof.
- 24. The laminate film structure of claim 18 wherein the thermoplastic polymer of the heat-sealable layer is selected from the group consisting of a propylene-butylene random copolymer, a metallocene catalyzed polyethylene, an ethylene vinyl acetate, and an ethylene-methyl acrylate, an ionomer, and blends thereof.
- 25. The laminate film structure of claim 24 wherein the functional layer comprises a material selected from the group consisting of an ethylene vinyl alcohol copolymer, a propylene-butylene copolymer, an ethylene vinyl acetate, an ethylene-methyl acrylate, and blends thereof.
- 26. The laminate film structure of claim 24 wherein the antiblocking agent is selected from the group consisting of cross linked silicone resin powder, methyl methacrylate resin powder, a spherical silica powder, and blends thereof.
- 27. The laminate film structure of claim 18 wherein the core layer comprises a cavitating agent selected from the group consisting of polybutylene terephthalate, calcium carbonate, and blends thereof.
- 28. The laminate film structure of claim 18 wherein the core layer is from about 5 to about 50 μm thick, the functional layer is from about 0.25 to about 3.0 μm thick, and the heat-sealable layer is from about 0.5 to about 7 μm thick.
- 29. The laminate film structure of claim 18 wherein the core layer is free of an antistatic agent and a fatty acid amide slip additive.
- 30. A coextruded heat-sealable film structure, comprising:
(a) a core layer comprising a thermoplastic polymer, the core layer having a first side and a second side; (b) a functional layer on the first side of the core layer, wherein the functional layer is selected from the group consisting of a laminating layer, a printable layer, a laminating and a printable layer, and a sealable layer; (c) a heat-sealable layer on the second side of the core layer comprising (i) a thermoplastic polymer and (ii) a slip system comprising a silicone gum having a viscosity greater than one million centistokes present in amount from about 0.2 wt. % to about 2.0 wt. % of the heat-sealable layer and at least one antiblocking agent present in an amount from about 0.05 wt. % to about 0.5 wt. % of the heat-sealable layer; and (d) wherein the heat-sealable film structure has a force over forming collar value of less than 20 pounds and a hot slip value of less than 20 at 290° C.; (e) wherein the core layer has a polymeric matrix selected from the group consisting of a ethylene propylene copolymer, propylene butylene copolymer, and a high density polyethylene; and (f) wherein the heat-sealable layer is comprised of a material selected from the group consisting of ethylene vinyl acetate, ethylene-methyl acrylate, an ionomer, and blends thereof.
- 31. A coextruded heat-sealable film structure, comprising:
(a) a core layer comprising a thermoplastic polymer, the core layer having a first side and a second side; (b) a functional layer on the first side of the core layer, wherein the functional layer is selected from the group consisting of a laminating layer, a printable layer, a laminating and a printable layer, and a sealable layer; (c) a heat-sealable layer on the second side of the core layer comprising (i) a thermoplastic polymer and (ii) a slip system comprising a silicone gum having a viscosity greater than one million centistokes present in amount from about 0.2 wt. % to about 2.0 wt. % of the heat-sealable layer and at least one antiblocking agent present in an amount from about 0.05 wt. % to about 0.5 wt. % of the heat-sealable layer; and (d) wherein the heat-sealable film structure has a force over forming collar value of less than 20 pounds and a hot slip value of less than 20 at 290° C.; (e) wherein the core layer has a polymeric matrix selected from the group consisting of a ethylene propylene copolymer, propylene butylene copolymer, and a high density polyethylene; and (f) wherein the functional layer is comprised of a material selected from the group consisting of ethylene vinyl acetate, ethylene-methyl acrylate, ethylene vinyl alcohol copolymer, propylene-butylene copolymer, and blends thereof.
- 32. The coextruded heat-sealable film structure of claim 31 wherein the heat-sealable layer is comprised of a material selected from the group consisting of ethylene vinyl acetate, ethylene-methyl acrylate, an ionomer, and blends thereof.
Parent Case Info
[0001] This Application claims the benefit of and is a Continuation-in-Part of regular U.S. patent application Ser. No. 09/714,332 filed Nov. 16, 2000.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09714332 |
Nov 2000 |
US |
Child |
10809259 |
Mar 2004 |
US |