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AssigneeKimberly-Clark Corporation
InventorsDiego H. Daponte, Susan E. Shawver, Sharon L. Watkins, Hugo P. Watts
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There is disclosed a nonwoven web consisting of highly drawn and unoriented thermoplastic fibers formed from a blend of propylene polymer and butylene polymer, wherein the blend by weight is from 90% to 50% polypropylene and from 10% to 50% polybutylene. The blend can be a blend of a homopolymer of polypropylene and a homopolymer of polybutylene; a homopolymer of polypropylene and a copolymer of butylene; a copolymer of propylene and a homopolymer of polybutylene; and a copolymer of propylene and a copolymer of butylene. In addition ternary blends (homopolymers of polypropylene, copolymers of propylene and butylene, terpolymers (propylene, 1-butene, and ethylene), and blends of terpolymers with polypropylene are useful. The resulting nonwoven webs have enhanced toughness, tear resistance, drape, and conformability.
A nonwoven web comprising at least one layer consisting of highly drawn and unoriented thermoplastic fibers formed from a blend comprising propylene polymers selected from the group consisting of homopolymers and copolymers of propylene and butylene polymers selected from the group of copolymers of butylene, wherein the blend by weight is from 90% to 50% propylene polymer and from 10% to 50% butylene polymer.
A nonwoven web comprising at least one layer consisting of highly drawn and unoriented thermoplastic fibers formed from a ternary blend comprising two different propylene polymers and a butylene copolymer, wherein the ternary blend by weight is from 10% to 50% butylene copolymer.
A nonwoven web comprising at least one layer consisting of highly drawn and unoriented thermoplastic fibers formed from a blend of a terpolymer, comprising propylene, 1-butene, and ethylene, and propylene polymer comprising at least 80% propylene, wherein the blend by weight is from 90% to 50% polypropylene.
A nonwoven wiper comprising a web consisting of highly drawn and unoriented thermoplastic fibers formed from a blend comprising propylene polymers selected from a group consisting of homopolymers and copolymers of propylene and butylene polymers selected from the group consisting of butylene copolymers, wherein the blend by weight is from 90% to 50% propylene polymer and from 10% to 50% butylene polymer.
A nonwoven wiper comprising a web consisting of highly drawn and unoriented thermoplastic fibers formed from a ternary blend comprising two different propylene polymers and butylene polymers, wherein the ternary blend by weight is from 10% to 50% polybutylene.
A nonwoven web comprising at least one layer consisting of highly drawn and unoriented thermoplastic fibers formed from a blend comprising propylene copolymers and butylene polymers selected from the group consisting of homopolymers and copolymers of butylene wherein the blend by weight is from 90% to 50% propylene copolymer and from 10% to 50% butylene-ethylene copolymer.
A nonwoven wiper comprising a web consisting of highly drawn and unoriented thermoplastic fibers formed from a blend of a terpolymer, comprising propylene, 1-butene, and ethylene, and propylene polymer comprising at least 80% propylene, wherein the blend by weight is from 90% to 50% polypropylene.
A method for forming a layer of a nonwoven web, the layer consisting of thermoplastic fibers comprising the steps of:
A method for forming a layer of a nonwoven web, the layer consisting of thermoplastic fibers comprising the steps of:
A method for forming a layer of a nonwoven web, the layer consisting of thermoplastic fibers comprising the steps of:
A method for forming a layer of a nonwoven web, the layer consisting of thermoplastic fibers comprising the steps of:
Dependencies are inferred from the claim text.