US2012238170A1PendingUtilityA1

Fluid Permeable Structured Fibrous Web

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Assignee: WEISMAN PAUL THOMASPriority: Mar 15, 2011Filed: Mar 15, 2011Published: Sep 20, 2012
Est. expiryMar 15, 2031(~4.7 yrs left)· nominal 20-yr term from priority
Inventors:Paul Thomas WeismanEric Patton WeinbergerEric Bryan BondDimitris Ioannis ColliasPatti Jean Kellett
Y10T442/60A61F 13/537D04H 3/011D04H 1/4226D04H 1/435
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Claims

Abstract

A fluid permeable structured fibrous web having thermally stable, fibers that are thermally bonded together using heat provides a base substrate that is thermally stable. The base substrate is textured via mechanical treatment producing a structured fibrous web having an aged caliper of less than 1.5 mm, a vertical wicking height of at least 5 mm, a permeability of at least 10,000 cm 2 /(Pa·s) and a specific volume of at least 5 cm 3 /g. The structured fibrous web provides optimal fluid wicking and fluid acquisition capabilities and is directed toward fluid management applications. The structured fibrous web has a bio-based content of about 10% to about 100% using ASTM D6866-10, method B.

Claims

exact text as granted — not AI-modified
1 . A fluid permeable structured fibrous web comprising thermoplastic fibers wherein the fibrous web has an aged caliper of less than 1.5 mm, vertical wicking height of at least 5 mm, a permeability of at least 10,000 cm 2 /(Pa·s), and a structured substrate specific volume of at least 5 cm 3 /g, and wherein the fibers of the fibrous web are formed from a thermoplastic polymer comprising a polyester, wherein the fibrous web comprises a bio-based content of about 10% to about 100% using ASTM D6866-10, method B. 
     
     
         2 . The fibrous web of  claim 1 , wherein the polyester comprises an alkylene terephthalate. 
     
     
         3 . The fibrous web of  claim 2 , wherein the alkylene terephthalate is selected from the group consisting of polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polycyclohexylene dimethyl terephthalate (PCT), and combinations thereof. 
     
     
         4 . The fibrous web  claim 1 , wherein the polyester comprises poly(ethylene 2,5-furandicarboxylate) (PEF). 
     
     
         5 . The fibrous web of  claim 1 , wherein the vertical wicking height is at least 20 mm. 
     
     
         6 . The fibrous web of  claim 1 , wherein the structured substrate specific volume is at least 10 cm 3 /g. 
     
     
         7 . The fibrous web of  claim 1 , wherein the fibrous web has an MD horizontal transport (horizontal wicking distance) of at least 10 cm. 
     
     
         8 . The fibrous web of  claim 1 , wherein the fibrous web has a permeability of at least 20,000 cm 2 /(Pa·s). 
     
     
         9 . The fibrous web of  claim 1 , wherein the fibrous web has an aged second strike through of less than 2 seconds. 
     
     
         10 . The fibrous web of  claim 1 , wherein the fibrous web has a rewet of less than 3.0 g. 
     
     
         11 . The fibrous web of  claim 1 , wherein the fibrous web has a basis weight of between 30 and 80 g/m 2 . 
     
     
         12 . The fibrous web of  claim 1 , wherein the aged caliper is greater than 0.5 mm. 
     
     
         13 . The fibrous web of  claim 1 , wherein the fibrous web has fiber content comprising at least 50% thermoplastic fibers.

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