Nonwoven sheet materials, tapes and methods
AssigneeMinnesota Mining and Manufacturing Company
InventorsJohn E. Riedel, Lauren K. Cran
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Abstract
Nonwoven sheet materials, and pressure sensitive adhesive tapes formed from nonwoven sheet materials are provided. The nonwoven sheet materials comprise a randomly interlaced fibrous web of tensilized nonfracturable staple fibers and binder fibers, wherein the fibrous web is pattern embossed, and is interbonded by a chemical bonding agent, physical entanglement, or a combination thereof, and further wherein the nonwoven sheet material is readily finger-tearable in the cross web direction. Methods of making nonwoven sheet materials and adhesive tapes are also provided.
Claims30
A nonwoven sheet material comprising a randomly interlaced fibrous web of tensilized nonfracturable staple fibers and binder fibers, wherein the fibrous web is first pattern embossed so as to be readily finger-tearable in the cross web direction, and subsequent to being pattern embossed is uniformly interbonded throughout by a chemical bonding agent, and further wherein the nonwoven sheet material exhibits a Hand measurement of less than 250 grams for about a 20 cm square sheet, and is readily finger-tearable in the cross machine direction and exhibits wet and dry break tensile strength of at least 10N/cm.
Dependencies are inferred from the claim text.