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US 2011/0226411 A1Published application
Spunbonded Heat Seal Material
AssigneeAhlstrom Nonwovens LLC
InventorsHelen Viazmensky, John M. Allen, Richard T. Giovannoni
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Abstract
Disclosed is a nonwoven web material comprising thermoplastic fibers or filaments and a method of manufacture thereof. The web material has properties desirable for use on machinery having conventional heat sealing stations. Also, disclosed is a nonwoven infusion web material comprising thermoplastic fibers or filaments and a method of manufacture thereof. The infusion web material has properties desirable for use in making infusion packages.
Claims17
1-20. (canceled)
A method of forming a multi-layer infusion sheet material comprising:
- extruding a thermoplastic spunbonded barrier layer,
- extruding a thermoplastic spunbonded heat seal layer,
- joining the barrier layer to the heat seal layer by at least one of calendering and use of a binder, the calendering and/or binder imparting reduced elongation to the infusion sheet material such that the infusion sheet material has a dry elongation value in the range of 0.5 percent to 3 percent under a 1000 gram load (TAPPI T494 OM 88 method).
Dependencies are inferred from the claim text.