Nonwoven sheet materials, tapes and methods
AssigneeMinnesota Mining and Manufacturing Company
InventorsJohn E. Riedel, Lauren K. Cran
Life of this patent
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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.
Claims14
A pressure-sensitive adhesive tape comprising a nonwoven backing with first and second surfaces, the nonwoven backing having a pressure-sensitive adhesive coated on the first surface, wherein the nonwoven backing comprises tensilized nonfracturable staple fibers and binder fibers randomly interlaced together to form a fibrous web, the fibrous web being first pattern embossed so as to be readily finger-tearable in the cross web direction and subsequent to being pattern embossed, uniformly interbonded throughout by a chemical bonding agent and further wherein the adhesive tape exhibits a Hand measurement of less than 250 grams for about a 20 cm square sheet and said adhesive tape exhibits wet and dry break tensile strengths of at least 10 N/cm.
A pressure-sensitive adhesive tape comprising a nonwoven backing with first and second surfaces, the nonwoven backing having a pressure-sensitive adhesive coated on the first surface, wherein the nonwoven backing comprises tensilized nonfracturable staple fibers and binder fibers randomly interlaced together to form a single-ply fibrous web, the fibrous web being pattern embossed so as to be readily finger-tearable in the cross web direction, and subsequent to being pattern embossed, uniformly interbonded throughout by a chemical bonding agent, physical entanglement, or combinations thereof, and further wherein the adhesive tape exhibits a Hand measurement of less than 250 grams for about a 20 cm square sheet and said adhesive tape exhibits wet and dry break tensile strengths of at least 10 N/cm.
Dependencies are inferred from the claim text.