US4439482A
Expired / Lapsed
US
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Pressure-sensitive adhesive tape
Assignee: Teijin Ltd
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Filing: 1981-11-12
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Granted: 1984-03-27
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Expires: 2001-11-12
Abstract
Abstract A base fabric for a pressure-sensitive adhesive tape comprising as the warp a flat yarn of polyester fibers containing a specific residue in the molecular chain. A pressure-sensitive adhesive tape obtained from this base fabric is easy to tear in the crosswise direction and has a smooth torn edge.
Inventors
- 👤 Masakazu Suematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:11
CPC Classifications
D; D03; D03D; D03D3/00; D03D3/005; C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; D01; D01F; D01F6/00; D01F6/78; D01F6/82; D01F6/88; D01F6/92; D03D15/00; D03D15/20; D03D15/283; D03D15/40; D03D15/44; D03D15/46; D03D15/50; D03D15/573; D06; D06M; D06M17/00; D06M17/04; C09J2400/00; C09J2400/20; C09J2400/26; C09J2400/263; D10; D10B; D10B2331/00; D10B2331/04; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/29; Y10T428/2904; Y10T428/2913; Y10T442/00; Y10T442/20; Y10T442/2008; Y10T442/2738; Y10T442/2754; Y10T442/30; Y10T442/3065; Y10T442/3089; Y10T442/3114; Y10T442/3179; Y10T442/322; Y10T442/3228; Y10T442/326; Y10T442/3285
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
15 words
A pressure-sensitive adhesive tape having an ultimate elongation in the lengthwise direction of 10-15% comprising:
Claim 2
Dependent Claim
15 words
A pressure-sensitive adhesive tape having an ultimate elongation in the lengthwise direction of 10-15% comprising:
Claim 3
Dependent Claim
186 words
(A) a base woven fabric which comprises as the warp a flat yarn of polyester fibers containing a residue of the following formula in the molecular chain: ##STR10## in which X is --SO 3 Na, --X', --OR, --R' or --OAr, X' is halogen, R and R' are independently alkyl, Ar is an aromatic radical which may optionally be substituted, m is 1 to 3, n and l are independently 0 to 2, and the bonding positions of the (CH 2 ) n -- and --(CH 2 ) l -- may be ortho-, meta- or para-positions; (B) a resin layer laminated to at least one side of said base fabric without an intermediate adhesive layer to form a laminate; (C) a releasing agent on one surface of said laminate; and (D) an adhesive on the other surface of said laminate; wherein said yarn has a tensile strength of greater than about 2 g/d and an elongation of greater than about 20% and having a strength in the weft direction of at least 15 Kg/25 mm width also having a tearing strength of no more than 400 g.
Claim 4
Dependent Claim
186 words
(A) a base woven fabric which comprises as the warp a flat yarn of polyester fibers containing a residue of the following formula in the molecular chain: ##STR10## in which X is --SO 3 Na, --X', --OR, --R' or --OAr, X' is halogen, R and R' are independently alkyl, Ar is an aromatic radical which may optionally be substituted, m is 1 to 3, n and l are independently 0 to 2, and the bonding positions of the (CH 2 ) n -- and --(CH 2 ) l -- may be ortho-, meta- or para-positions; (B) a resin layer laminated to at least one side of said base fabric without an intermediate adhesive layer to form a laminate; (C) a releasing agent on one surface of said laminate; and (D) an adhesive on the other surface of said laminate; wherein said yarn has a tensile strength of greater than about 2 g/d and an elongation of greater than about 20% and having a strength in the weft direction of at least 15 Kg/25 mm width also having a tearing strength of no more than 400 g.
Claim 5
Dependent Claim
22 words
A pressure-sensitive adhesive tape according to claim 1, wherein said residue is contained in an amount of 1 to 30% by weight.
Claim 6
Dependent Claim
17 words
A pressure-sensitive adhesive tape according to claim 1, wherein the weft is composed of ordinary polyester fibers.
Claim 7
Dependent Claim
25 words
A pressure-sensitive adhesive tape according to claim 1, wherein the weft is composed of polyester fibers of the same type as that of the warp.
Claim 8
Dependent Claim
23 words
A pressure-sensitive adhesive tape according to claim 1, wherein the warp and the weft have independently a fineness of 50 to 100 denier.
Claim 9
Dependent Claim
18 words
A pressure-sensitive adhesive tape according to claim 5, wherein the warp and the weft have the same fineness.
Claim 10
Dependent Claim
69 words
A process for preparing a pressure-sensitive adhesive tape comprising applying a resin layer onto a base fabric according to claim 1, heat treating the base fabric having the resin layer applied at a temperature of from 250° to 350° C. for several tenths of a second to several seconds, and then applying a releasing agent onto one surface of said treated fabric and an adhesive onto the other surface.
Claim 11
Dependent Claim
18 words
A process according to claim 7, wherein the heat treatment is carried out for 0.5 to 5 seconds.
Claim 12
Dependent Claim
34 words
A process according to claim 7, wherein the resin layer is applied onto the base fabric by laminating as a thin film or by coating or spraying as a solution in a suitable solvent.
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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |