US4269886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel glass fiber mat
Assignee: Building Materials Corp of America
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Filing: 1979-08-30
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Granted: 1981-05-26
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Expires: 1999-08-30
Abstract
Abstract A novel glass fiber mat is described herein. The mat includes a plurality of substantially uniformly enmeshed individual filament fibers which comprise at least 70% by weight of the fibrous component of the mat. The mat is further characterized in that less than 20% of the area of the mat are voids which extend through the thickness of the mat, the rest being fibrous material, of said voids, at least 80%, 30% and 10%, have an equivalent diameter whose size is less than about 50 microns, 10 microns and 5 microns, respectively. This mat has an exceedingly high tensile strength both in the machine and the cross-machine directions.
Inventors
- 👤 Alfredo A. Bondoc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:44
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/61; C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/25; D06; D06N; D06N5/00; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21H23/00; D21H23/02; D21H23/04; D21H23/06; D21H23/08; D21H23/10; D21H5/00; D21H5/12; D21H5/1254; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/26; Y10T428/266; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
A novel glass fiber mat comprising glass fibers, voids extending through the thickness of said mat and a binder to hold said fibers together, said fibers having a length of about 1/4 to 3 inches and a diameter of about 3 to 20 microns, said mat having a thickness of about 0.1 to 3 mm. and a basis weight of about 20 to 200 g./m 2 , characterized in that: (a) at least about 70% by weight of said fibers are substantially uniformly enmeshed individual filament fibers, (b) less than about 20% of the area of said mat are voids which extend through the thickness of the mat, the rest being fibers, and, (c) at least about 80%, 30% and 10% of said voids have an equivalent diameter which is less than about 50, 10 and 5 microns, respectively.
Claim 2
Dependent Claim
139 words
A novel glass fiber mat comprising glass fibers, voids extending through the thickness of said mat and a binder to hold said fibers together, said fibers having a length of about 1/4 to 3 inches and a diameter of about 3 to 20 microns, said mat having a thickness of about 0.1 to 3 mm. and a basis weight of about 20 to 200 g./m 2 , characterized in that: (a) at least about 70% by weight of said fibers are substantially uniformly enmeshed individual filament fibers, (b) less than about 20% of the area of said mat are voids which extend through the thickness of the mat, the rest being fibers, and, (c) at least about 80%, 30% and 10% of said voids have an equivalent diameter which is less than about 50, 10 and 5 microns, respectively.
Claim 3
Dependent Claim
22 words
A novel glass mat according to claim 1 wherein said individual filament fibers comprise at least 80% by weight of said fibers.
Claim 4
Dependent Claim
22 words
A novel glass mat according to claim 1 wherein said individual filament fibers comprise at least 90% by weight of said fibers.
Claim 5
Dependent Claim
21 words
A novel glass fiber mat according to claim 1 wherein the length of said fibers are about 1/2 to 1-1/2 inches.
Claim 6
Dependent Claim
21 words
A novel glass fiber mat according to claim 1 wherein the diameter of said fibers are about 8 to 19 microns.
Claim 7
Dependent Claim
21 words
A novel glass fiber mat according to claim 1 wherein said thickness of said mat is about 0.3 to 2 mm.
Claim 8
Dependent Claim
24 words
A novel glass fiber mat according to claim 1 wherein said basis weight of said mat is about 40 to 110 g./m 2 .
Claim 9
Dependent Claim
29 words
A novel glass fiber mat according to claim 1 wherein said fibers comprise about 70% to 90% and said binder about 10% to 40% by weight of said mat.
Claim 10
Dependent Claim
32 words
A novel glass fiber mat according to claim 1 wherein the tensile strength is at least 300/100 N/50 mm width MD/CMD, respectively, at a basis weight of about 100 g./m 2 .
Claim 11
Dependent Claim
26 words
A novel glass fiber mat according to claim 1 wherein at least 15% of said voids have an equivalent diameter which is less than 5 microns.
Claim 12
Dependent Claim
115 words
A novel glass fiber mat according to claim 1 having a fiber length of about 1 inch, a fiber diameter of about 16 microns, a mat thickness of about 1 mm., a basis weight of about 110 g./m 2 , fiber and binder contents of about 80% and 20%, respectively, a tensile strength of about 500/280 N/50 mm width, MD/CMD, respectively, further characterized in that about 85% by weight of said fibers are substantially uniformly enmeshed individual filament fibers, about 18.4% by area of said mat are said voids, the rest being fibers, about 82.9%, 37.0% and 17.9% of said voids having an equivalent diameter which is less than 50, 10 and 5 microns, respectively.
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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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |