Container liner for dough products
AssigneeInternational Paper Company
InventorGary H. Knauf
Life of this patent
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Abstract
An inner layer, i.e. liner, for a generally tubular, multilayered dough container comprising a laminated web suitable for being helically wound into a tubular geometry and which includes a plurality of layers, the innermost of such web layers providing improved bonding characteristics for the liner, hence improved containment and sealing of the dough, and a container including such liner.
Claims8
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.
Dependencies are inferred from the claim text.