Claims
- 1. A multilayered inner liner for a helically wound tubular container having a multilayered cylindrical wall and closed opposite ends for confining dough products which exude a syrup-like liquid over time during containment comprising a helically wound laminate assembly including a heavy weight paperboard strength layer that is substantially free of urea formaldehyde wet strength additive and polyvinyl chloride adhesive for bonding said inner liner which comprises an unbleached, machine glazed, 17 to 35 lb./3MSF basis weight kraft paper web first layer that is also free of wet strength additives, a chloride-free adhesive second layer, a gas and moisture barrier third layer and a fourth layer comprising a coextruded lamination of acrylic acid copolymer resin and high density polyethylene resin, said layers being disposed in the foregoing listed sequence with the high density polyethylene resin laminae of said fourth layer being innermost of said container and adapted to be in physical contact with said syrup-like exudate from said dough product, said layers being helically wound into a generally tubular geometry with contiguous side edges of said first through fourth layer being formed into a pleat-type helical seal in which one of said contiguous side edges of said liner is folded back upon itself whereby said fourth layer in the region of this fold and which bears said high density polyethylene resin is in facing relationship and substantially uniformly heat sealed to itself along the length of such pleat-type seal to thereby form an effective seal against the leakage of said syrup-like exudate into said helical seal along the length of said seal and to reduce the migration of said syrup-like exudate out of said container in the area of its closed ends.
- 2. The multilayered inner liner of claim 1 wherein said fourth layer acrylic acid copolymer resin is selected from the group consisting of polyethylene acrylic acid resin and polyethylene methylacrylic acid resin.
- 3. The multilayer inner liner of claim 1 wherein said second layer is an acrylic acid copolymer resin selected from the group consisting of polyethylene acrylic acid resin and polyethylene methyacrylic acid resin.
- 4. The multilayer inner liner of claim 2 wherein said third layer comprises a 0.0002 inch to 0.0003 inch thickness of aluminum foil.
- 5. The multilayer inner liner of claim 3 wherein said third layer comprises a 0.0002 inch to 0.0003 inch thickness of aluminum foil.
- 6. The multilayer inner liner of claim 4 wherein said coextruded fourth layer comprises about 20% acrylic acid copolymer resin and about 80% high density polyethylene resin.
- 7. The multilayer inner liner of claim 6 wherein said high density polyethylene resin portion of said fourth layer is coextruded at the rate of about 6 lb/3MSF to about 7 lb/3MSF.
- 8. The multilayer inner liner of claim 4 wherein said first layer comprises an unbleached, machine glazed, kraft paper having a basis weight of between about 17 lb./3MSF to about 35 lb./3MSF.
Parent Case Info
This application is a Continuation-In-Part of application Ser. No. 07/963,891 filed Oct. 19, 1992, which is now abandoned.
US Referenced Citations (15)
Non-Patent Literature Citations (2)
Entry |
Tappi Proceedings, 1988 Polymers, Laminations and Coatings Conference, Atlanta, Ga. Sep. 13-16, 1988. |
Nucrel O910NS Product Bulletin Dupont Company, Polymer Products Dept. Packaging Products Division, Wilmington, De. 19898. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
963891 |
Oct 1992 |
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