US4830904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous thermoformable heat sealable nonwoven fabric
Assignee: Fitesa Simpsonville Inc
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Filing: 1987-11-06
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Granted: 1989-05-16
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Expires: 2007-11-06
Abstract
Abstract A porous thermoformable heat sealable nonwoven fabric that is constructed by carding a bicomponent polymeric fiber and then heating the resulting fibrous web to cause bonding. The polymeric components of the bicomponent fiber have crystalline melting points that differ by at least 30° C. The bicomponent fiber has a staple length ranging from 1.5" to 3.0" and a staple elongation-to-break of at least 30%.
Inventors
- 👤 Scott L. Gessner
- 👤 Henry S. Ostrowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/29; Y10T428/2904; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/298; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/69
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
71 words
A porous thermoformable heat sealable nonwoven fabric having a basis weight ranging from 0.5 ounces per square yard to 3.0 ounces per square yard comprising: bicomponent polymeric fibers carded and then bonded together, said fibers having a staple length ranging from 1.5" to 3.0" and a staple elongation-to-break of at least 30%, wherein the crystalline melting points of the components of said bicomponent polymeric fibers differ by at least 30° C.
Claim 2
Dependent Claim
71 words
A porous thermoformable heat sealable nonwoven fabric having a basis weight ranging from 0.5 ounces per square yard to 3.0 ounces per square yard comprising: bicomponent polymeric fibers carded and then bonded together, said fibers having a staple length ranging from 1.5" to 3.0" and a staple elongation-to-break of at least 30%, wherein the crystalline melting points of the components of said bicomponent polymeric fibers differ by at least 30° C.
Claim 3
Dependent Claim
17 words
The fabric of claim 1, further comprising a non-bicomponent fiber carded and bonded with said bicomponent fibers.
Claim 4
Dependent Claim
14 words
The fabric of claim 1, wherein said fabric comprises a blend of bicomponent fibers.
Claim 5
Dependent Claim
45 words
The fabric of claim 1, wherein said bicomponent fiber materials are selected from the group consisting of polypropylene/polyethylene terephthalate; polypropylene/nylon 6; polypropylene/nylon 6,6; nylon 6/polyethylene terephthalate, copolyester/polyethylene terephthalate; copolyester/nylon 6; copolyester/nylon 6,6; poly 4-methyl, 1-pentene/polyethylene terephthalate; poly 4-methyl, 1-pentene/nylon 6 and poly 4-methyl, 1-pentene/nylon 6,6.
Claim 6
Dependent Claim
14 words
The fabric of claim 1, wherein said fiber staple length is approximately 2.25 inches.
Claim 7
Dependent Claim
13 words
The fabric of claim 1, wherein said staple fiber elongation-to-break is approximately 100%.
Claim 8
Dependent Claim
15 words
The fabric of claim 1, wherein said crystalline melting points differ by approximately 50° C.
Claim 9
Dependent Claim
20 words
The fabric of claim 1, wherein said bicomponent polymeric fiber components are arranged in radial, orbital, side-by-side or sheath/core configurations.
Claim 10
Dependent Claim
10 words
The fabric of claim 8, wherein said configuration is sheath/core.
Claim 11
Dependent Claim
23 words
The fabric of claim 9, wherein the melting point of said sheath component is lower than the melting point of said core component.
Claim 12
Dependent Claim
24 words
The fabric of claim 1, wherein the components of said bicomponent polymeric fibers are present in a ratio from 1:3 to 3:1 by weight.
Claim 13
Dependent Claim
14 words
The fabric of claim 11, wherein said bicomponent ratio is approximately 1:1 by weight.
Claim 14
Dependent Claim
19 words
The fabric of claim 1, wherein said bicomponent fibers have a denier ranging from 1.5 dpf to 11 dpf.
Claim 15
Dependent Claim
12 words
The fabric of claim 13, wherein said denier is approximately 6.0 dpf.
Claim 16
Dependent Claim
20 words
The fabric of claim 1, wherein said fabric has a Frazier air permeability ranging from 450 cfm to 650 cfm.
Claim 17
Dependent Claim
14 words
The fabric of claim 15, wherein said Frazier air permeability is approximately 550 cfm.
Claim 18
Dependent Claim
17 words
The fabric of claim 1, wherein said bicomponent fibers have a tenacity of at least 0.75 grams/denier.
Claim 19
Dependent Claim
12 words
The fabric of claim 17, wherein said tenacity is approximately 2.0 grams/denier.
Claim 20
Dependent Claim
16 words
The fabric of claim 1, wherein said basis weight is approximately 1.3 ounces per square yard.
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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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |