Patent US5494736A successfully refreshed from Google Patents.
US5494736A
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US
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High elongation thermally bonded carded nonwoven fabrics
Assignee: Fitesa Simpsonville Inc
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Filing: 1994-01-04
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Granted: 1996-02-27
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Expires: 2014-01-04
Abstract
Abstract The invention provides high elongation thermally bonded nonwoven fabrics which exhibit elongation of at least about 130% in the cross-machine direction. The fabrics of the invention include a nonwoven a web of polyolefin staple fibers having an elongation of at least 400 percent, and a multiplicity of discrete thermal bonds throughout the web to provide a bond area of from 8 to 25 percent of the area of the fabric.
Inventors
- 👤 Jacqueline A. Willey
- 👤 William L. Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:05
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/542; D04H1/544; D04H1/541; D04H1/5412; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/69; Y10T442/695
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
79 words
A high elongation thermally bonded nonwoven fabric comprising a web of polyolefin staple fibers, said polyolefin fibers having an elongation of at least 400 percent, and a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric and bonding the fibers of the web to form a strong fabric having an elongation in the cross machine direction of at least 130 percent.
Claim 2
Dependent Claim
79 words
A high elongation thermally bonded nonwoven fabric comprising a web of polyolefin staple fibers, said polyolefin fibers having an elongation of at least 400 percent, and a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric and bonding the fibers of the web to form a strong fabric having an elongation in the cross machine direction of at least 130 percent.
Claim 3
Dependent Claim
24 words
A nonwoven fabric according to claim 1, wherein said web comprises a carded web formed with a processing draft of less than 50% total.
Claim 4
Dependent Claim
44 words
A nonwoven fabric according to claim 1, having a basis weight of from 20 to 30 grams per square yard, a machine direction tensile strength of at least about 1400 grams/inch and a cross machine direction tensile strength of at least about 400 grams/inch.
Claim 5
Dependent Claim
33 words
A nonwoven fabric according to claim 1 having a tensile strength ratio in the machine direction as compared to the cross machine direction of the fabric of about 2/1 to about 4/1 grams/inch.
Claim 6
Dependent Claim
33 words
A nonwoven fabric according to claim 1 having a tensile strength ratio in the machine direction as compared to the cross machine direction of the fabric of about 2.5/1 to about 3.5/1 grams/inch.
Claim 7
Dependent Claim
117 words
A high elongation thermally bonded nonwoven fabric comprising a web of polypropylene staple fibers, said fibers having an elongation of at least 400 percent, and a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric and bonding the lower melting sheath components of the fibers to form a strong fabric having an elongation in the cross machine direction of at least 130 percent, a basis weight of from 20 to 30 grams per square yard, a machine direction tensile strength of about 1400 to 2700 grams/inch and a cross machine direction tensile strength of about 400 to 800 grams/inch.
Claim 8
Dependent Claim
117 words
A high elongation thermally bonded nonwoven fabric comprising a web of polypropylene staple fibers, said fibers having an elongation of at least 400 percent, and a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric and bonding the lower melting sheath components of the fibers to form a strong fabric having an elongation in the cross machine direction of at least 130 percent, a basis weight of from 20 to 30 grams per square yard, a machine direction tensile strength of about 1400 to 2700 grams/inch and a cross machine direction tensile strength of about 400 to 800 grams/inch.
Claim 9
Dependent Claim
79 words
A process for producing a high elongation thermally bonded nonwoven fabric comprising: forming a nonwoven web of polyolefin staple fibers, said polyolefin fibers having an elongation of at least 400 percent; and forming a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric, to form a strong fabric having an elongation in the cross machine direction of at least 130 percent.
Claim 10
Dependent Claim
79 words
A process for producing a high elongation thermally bonded nonwoven fabric comprising: forming a nonwoven web of polyolefin staple fibers, said polyolefin fibers having an elongation of at least 400 percent; and forming a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric, to form a strong fabric having an elongation in the cross machine direction of at least 130 percent.
Claim 11
Dependent Claim
29 words
A process according to claim 7 wherein the step of forming said nonwoven web comprises processing the polyolefin staple fibers through a carding machine and forming a carded web.
Claim 12
Dependent Claim
25 words
A process according to claim 8 wherein the processing of the fibers through a carding machine employs a processing draft of less than 50% total.
Claim 13
Dependent Claim
44 words
A process according to claim 7 wherein the step of forming a nonwoven web comprises orienting the fibers so that the machine direction tensile strength as compared to the cross machine direction tensile strength of the fabric is about 2/1 to about 4/1 grams/inch.
Claim 14
Dependent Claim
44 words
A process according to claim 7 wherein the step of forming a nonwoven web comprises orienting the fibers so that the machine direction tensile strength as compared to the cross machine direction tensile strength of the fabric is about 2.5/1 to about 3.5/1 grams/inch.
Claim 15
Dependent Claim
32 words
A process according to claim 7 wherein the step of forming a nonwoven web comprises forming a nonwoven fabric having a basis weight of from 20 to 30 grams per square yard.
Claim 16
Dependent Claim
119 words
A process for producing a high elongation thermally bonded nonwoven fabric comprising: forming a nonwoven web of polypropylene staple fibers, said fibers having an elongation of at least 400 percent; and thermally bonding the fibers via a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric, to thereby form a strong fabric having an elongation in the cross machine direction of at least 130 percent, a basis weight of from 20 to 30 grams per square yard, a machine direction tensile strength of about 1800 to 2700 grams/inch and a cross machine direction tensile strength of about 400 to 800 grams/inch.
Claim 17
Dependent Claim
119 words
A process for producing a high elongation thermally bonded nonwoven fabric comprising: forming a nonwoven web of polypropylene staple fibers, said fibers having an elongation of at least 400 percent; and thermally bonding the fibers via a multiplicity of discrete thermal bonds throughout the web, said thermal bonds having a bond area of from 8 to 25 percent of the area of the fabric, to thereby form a strong fabric having an elongation in the cross machine direction of at least 130 percent, a basis weight of from 20 to 30 grams per square yard, a machine direction tensile strength of about 1800 to 2700 grams/inch and a cross machine direction tensile strength of about 400 to 800 grams/inch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-26 | 1999-08-28 | 2000-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-26 | 2003-08-28 | 2004-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-26 | 2007-08-28 | 2008-02-27 | $7700.00 | Window Closed / Lapsed |