US5039431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-blown nonwoven wiper
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1989-12-19
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Granted: 1991-08-13
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Expires: 2009-12-19
Abstract
Abstract There is disclosed a nonwoven wiper comprising a composite web made of a number of interbonded layers of meltblown thermoplastic fibers. The outer layers have average pore sizes greater than 20 microns and preferably greater than 40 microns for rapid pick up of liquid. The internal layers have average pore sizes between 10-20 microns for liquid holding capacity.
Inventors
- 👤 Malcolm L. Johnson
- 👤 Tracey A. Burbank
- 👤 Mark D. Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:22
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A47; A47L; A47L13/00; A47L13/10; A47L13/16; A61F13/15203; B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4374; D04H1/54; D04H1/559; D04H1/56; A61F13/15577; A61F2013/15821; A61F2013/15934; A61F2013/15967; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T442/00; Y10T442/60; Y10T442/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A process for forming a composite web having a basis weight and drape stiffness adapted for use as a nonwoven wiper comprising sequentially depositing and interbonding a number of layers of melt-blown thermoplastic fibers, one on top of the other, onto a collector wherein the forming parameters of each layer are controlled so that at least one outer layer has pores having an average size greater than 40 microns and at least one other layer has pores having an average size between 10 microns and 20 microns, and wherein said interbonding maintains the bulk of said composite.
Claim 2
Dependent Claim
97 words
A process for forming a composite web having a basis weight and drape stiffness adapted for use as a nonwoven wiper comprising sequentially depositing and interbonding a number of layers of melt-blown thermoplastic fibers, one on top of the other, onto a collector wherein the forming parameters of each layer are controlled so that at least one outer layer has pores having an average size greater than 40 microns and at least one other layer has pores having an average size between 10 microns and 20 microns, and wherein said interbonding maintains the bulk of said composite.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |