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US 8,372,766 B2Granted
Conductive webs
AssigneeKimberly-Clark Worldwide, Inc.
InventorsDavis-Dang H. Nhan, Duane Joseph Shukoski
Life of this patent
Estimating the term…
Abstract
Conductive nonwoven webs are disclosed. The nonwoven webs contain pulp fibers combined with conductive fibers. In one embodiment, the webs are made in a wetlaid tissue making process.
Claims26
A nonwoven material comprising:
- a nonwoven base web containing pulp fibers in an amount of at least about 50% by weight, the nonwoven base web further comprising conductive fibers in an amount of at least about 1% by weight, the conductive fibers comprising carbon fibers;
- wherein the carbon fibers contain carbon in an amount greater than about 90% by weight;
- wherein the conductive fibers are present in the nonwoven base web so as to form at least one conductive zone and at least one nonconductive zone, the at least one conductive zone having a resistance of less than about 1500 Ohms/square;
- wherein the nonwoven base web comprises a single ply web and is formed via depositing the fibers generally simultaneously in a wet laid process;
- and
- wherein the at least one conductive zone and at least one nonconductive zone can be positioned either generally vertically or generally horizontally with respect to one another in the single ply web via the wet laid process, such that the at least one conductive zone is a mixture of pulp fibers and conductive fibers and the at least one nonconductive zone lacks conductive fibers;
- and
- the nonwoven base web is calendared.
5 more elements
A nonwoven material comprising:
- a nonwoven base web comprising a single ply web containing layers of fibers wherein the nonwoven base web is formed via depositing the layers of fibers generally simultaneously in a wet laid process, the base web including at least a first layer of fibers and a second layer of fibers, the first layer containing pulp fibers, the second layer containing conductive fibers wherein the conductive fibers contain carbon in an amount greater than about 90% by weight, wherein the conductive fibers are present in the nonwoven base web so as to form at least one conductive zone and at least one nonconductive zone, the at least one conductive zone having a resistance of less than about 1500 Ohms/square;
- wherein the base web further includes a third layer of fibers, the second layer being positioned in between the first layer and the third layer, the first layer and the third layer comprising essentially pulp fibers;
- and
- wherein the conductive zone and nonconductive zone can be in different layers of fibers or contained in the same layer of fibers and the at least one conductive zone is a mixture of pulp fibers and conductive fibers and the at least one nonconductive zone lacks conductive fibers.
1 more element
A nonwoven material comprising:
- a nonwoven base web containing pulp fibers in an amount of at least about 50% by weight, the nonwoven base web further comprising conductive fibers in an amount of at least about 1% by weight, the conductive fibers comprising carbon fibers;
- wherein the carbon fibers contain carbon in an amount greater than about 90% by weight;
- wherein the conductive fibers are present in the nonwoven base web so as to form at least two conductive zones and at least one nonconductive zone, each of the conductive zones having a resistance of less than about 1500 Ohms/square;
- wherein the nonwoven base web comprises a single ply web and is formed via depositing the fibers generally simultaneously in a wet laid process;
- wherein the at least one nonconductive zone is positioned between and separates the at least two conductive zones and the at least two conductive zones are mixtures of pulp fibers and conductive fibers and the at least one nonconductive zone lacks conductive fibers;
- and
- the nonwoven base web is calendared.
4 more elements
Dependencies are inferred from the claim text.