US4770490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament reinforced tape
Assignee: 3M Co
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Filing: 1986-08-07
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Granted: 1988-09-13
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Expires: 2006-08-07
Abstract
Abstract Tape reinforced by means of filaments comprising a backing and a plurality of yarns comprising a multiplicity of filaments adhered to at least one major surface of said backing by means of a layer of an adhesive. The yarns are disposed essentially parallel to each other along the machine direction of the tape. The yarn-bearing surface of the backing is coated with a polymeric material that both overcoats the filaments and detackifies the residual adhesive between the yarns. The yarns are preferably elliptical in cross-section, with the major axis thereof being essentially parallel to the plane of said backing. In a second embodiment, the tape is reinforced by individual filaments adhered to the backing by means of a layer of adhesive. One advantage of the tape of this invention is that the polymeric material makes it possible for the tape to be applied to optical fiber cable from conventional apparatus without having adhesive from the tape stick to the apparatus. A second advantage is that the polymeric material strengthens the yarns so as to minimize unraveling thereof.
Inventors
- 👤 Larry E. Gruenewald
- 👤 Donald J. Klassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:27
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B29L; B29L2007/00; B29L2007/007; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2307/00; B32B2307/50; B32B2307/54; B32B2457/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
97 words
Tape comprising a backing having adhered to at least one major surface thereof by means of a layer of adhesive, a plurality of yarns each of which comprises a multiplicity of filaments, said yarns being spaced apart, said at least one major surface being coated with a polymeric material in an amount sufficient to detackify the adhesive layer between said yarns and to prevent the yarns from unraveling, the coefficient of static friction of the coating formed by said polymeric material being equal to or less than about 2.8, as measured according to ASTM D 1894 (1978).
Claim 2
Dependent Claim
97 words
Tape comprising a backing having adhered to at least one major surface thereof by means of a layer of adhesive, a plurality of yarns each of which comprises a multiplicity of filaments, said yarns being spaced apart, said at least one major surface being coated with a polymeric material in an amount sufficient to detackify the adhesive layer between said yarns and to prevent the yarns from unraveling, the coefficient of static friction of the coating formed by said polymeric material being equal to or less than about 2.8, as measured according to ASTM D 1894 (1978).
Claim 3
Dependent Claim
19 words
Tape according to claim 1 wherein the surface opposite that bearing the yarns bears a low adhesion backsize coating.
Claim 4
Dependent Claim
11 words
Tape according to claim 1 wherein the polymeric material is non-tacky.
Claim 5
Dependent Claim
26 words
Tape according to claim 1 wherein the elongation of the filaments is equal to or greater than 10%, as measured in accordance with ASTM D-885 (1985).
Claim 6
Dependent Claim
26 words
Cable comprising a plurality of optical fibers, said optical fibers being held in a bundle by at least one ribbon of the tape of claim 4.
Claim 7
Dependent Claim
32 words
Tape according to claim 1 wherein the tensile strength of the filaments is equal to or greater than 35,000 lb/sq. in. (2461 kg/sq. cm.), as measured in accordance with ASTM D-885 (1985).
Claim 8
Dependent Claim
19 words
Tape according to claim 1 wherein said backing has a thickness of about 0.0127 mm to about 0.127 mm.
Claim 9
Dependent Claim
20 words
Tape according to claim 1 wherein the filaments have a diameter of from about 0.005 mm to about 0.015 mm.
Claim 10
Dependent Claim
10 words
Tape according to claim 1 wherein the filaments comprise polyester.
Claim 11
Dependent Claim
10 words
Tape according to claim 1 wherein the backing comprises polyester.
Claim 12
Dependent Claim
12 words
Tape according to claim 1 wherein the adhesive is a pressure-sensitive adhesive.
Claim 13
Dependent Claim
20 words
Tape according to claim 1 wherein the polymeric material is styrene-isoprene-styrene block copolymer and aromatic hydrocarbon end block reinforcing resin.
Claim 14
Dependent Claim
23 words
Tape according to claim 1 wherein said yarns have an elliptical cross-section, the major axis of which is essentially parallel to said backing.
Claim 15
Dependent Claim
82 words
Tape comprising a backing have adhered to at least one major surface thereof by means of a layer of adhesive a multiplicity of filaments, said filaments being spaced apart, said at least one major surface being coated with a polymeric material in an amount sufficient to detackify the adhesive layer between said filaments, the coefficient of static friction of the coating formed by said polymeric material being equal to or less than about 2.8, as measured according to ASTM D 1894 (1978).
Claim 16
Dependent Claim
82 words
Tape comprising a backing have adhered to at least one major surface thereof by means of a layer of adhesive a multiplicity of filaments, said filaments being spaced apart, said at least one major surface being coated with a polymeric material in an amount sufficient to detackify the adhesive layer between said filaments, the coefficient of static friction of the coating formed by said polymeric material being equal to or less than about 2.8, as measured according to ASTM D 1894 (1978).
Claim 17
Dependent Claim
19 words
Tape according to claim 14 wherein the surface opposite that bearing the yarns bears a low adhesion backsize coating.
Claim 18
Dependent Claim
10 words
Tape according to claim 14 wherein the filaments comprise polyester.
Claim 19
Dependent Claim
12 words
Tape according to claim 14 wherein the adhesive is a pressure-sensitive adhesive.
Claim 20
Dependent Claim
26 words
Tape according to claim 15 wherein the elongation of the filaments is equal to or greater than 10%, as measured in accordance with ASTM D-885 (1985).
Claim 21
Dependent Claim
26 words
Cable comprising a plurality of optical fibers, said optical fibers being held in a bundle by at least one ribbon of the tape of claim 18.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |