US3853657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding of poly(ethylene terephthalate) induced by low-temperature plasmas
Assignee: Monsanto Co
•
Filing: 1972-02-14
•
Granted: 1974-12-10
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Expires: 1992-02-14
Abstract
Abstract Bonding of polyester tire cord to rubber by conventional adhesive treatments is improved by pretreating the yarn or the cord by brief exposure to a non-oxidizing low temperature gas plasma.
Inventors
- 👤 E Lawton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:47
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/0042; B29; B29B; B29B15/00; B29B15/08; B29C; B29C59/00; B29C59/14; C; C08; C08J; C08J5/00; C08J5/04; C08J5/046; C08J5/06; B29C35/00; B29C35/02; B29C35/04; B29C35/06; B29C35/065; B29C65/00; B29C65/48; B29C65/4805; B29C65/483; B29C65/4835; B29C66/00; B29C66/01; B29C66/02; B29C66/69; B29C66/70; B29C66/71; B29D; B29D30/00; B29D30/06; B29D30/38; B29D2030/383; B29K; B29K2021/00; B29K2077/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2267/00; C08J2321/00; C08J2321/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A TREATMENT FOR FILAMENTS DERIVED FROM A LONG CHAIN SYNTHETIC POLYMER COMPOSED OF AT LEAST 85 PERCENT BY WEIGHT OF AN ESTER OF DIHYDRIC ALCOHOL AND TEREPHTHALIC ACID COMPRISING EXPOSING THE SURFACE OF A FIBER FOR A PERIOD OF AT LEAST ABOUT 1 SECOND TO A MORE LOW TEMPERATURE GAS PLASMA AT A PRESSURE OF NOT MOE THAN ABOUT 2 TORR AND A CONCENTRATION OF ELECTRONS OF ABOUT 10**10-10**13 PER CUBIC CENTIMETER, WHEREBY BONDABILITY OF THE FILAMENT TO RUBBER WITH RESIN-LATEX ADHESIVES IS SUBSTAN-
Claim 2
Dependent Claim
84 words
A TREATMENT FOR FILAMENTS DERIVED FROM A LONG CHAIN SYNTHETIC POLYMER COMPOSED OF AT LEAST 85 PERCENT BY WEIGHT OF AN ESTER OF DIHYDRIC ALCOHOL AND TEREPHTHALIC ACID COMPRISING EXPOSING THE SURFACE OF A FIBER FOR A PERIOD OF AT LEAST ABOUT 1 SECOND TO A MORE LOW TEMPERATURE GAS PLASMA AT A PRESSURE OF NOT MOE THAN ABOUT 2 TORR AND A CONCENTRATION OF ELECTRONS OF ABOUT 10**10-10**13 PER CUBIC CENTIMETER, WHEREBY BONDABILITY OF THE FILAMENT TO RUBBER WITH RESIN-LATEX ADHESIVES IS SUBSTAN-
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein the polyester filaments are in the form of filament bundles of a total denier of about 500-1, 5000 when treated with gas plasma.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the polyester filaments are in the form of tire cords when treated with gas plasma.
Claim 5
Dependent Claim
115 words
In a process for bonding cords to rubber, a substantial portion which cords consist of filaments derived from a long chain synthetic polymer composed of at least 85 percent by weight of an ester of a dihydric alcohol and terephthalic acid, wherein said individual filaments in the form of yarns are plied into a cord and therafter dipped into a resin-latex adhesive and subsequently cured, the improvement comprising exposing the fibers to a non-oxidizing low temperature gas plasma at a pressure of not more than about 2 torr at a concentration of electrons of about 1010 -1013 per cubic centimeter for a period of at least about 1 second before dipping into said resin-latex adhesive.
Claim 6
Dependent Claim
115 words
In a process for bonding cords to rubber, a substantial portion which cords consist of filaments derived from a long chain synthetic polymer composed of at least 85 percent by weight of an ester of a dihydric alcohol and terephthalic acid, wherein said individual filaments in the form of yarns are plied into a cord and therafter dipped into a resin-latex adhesive and subsequently cured, the improvement comprising exposing the fibers to a non-oxidizing low temperature gas plasma at a pressure of not more than about 2 torr at a concentration of electrons of about 1010 -1013 per cubic centimeter for a period of at least about 1 second before dipping into said resin-latex adhesive.
Claim 7
Dependent Claim
21 words
The processing improvement of claim 4 wherein the fibers are in the form of yarn when exposed to the gas plasma.
Claim 8
Dependent Claim
21 words
The process improvement of claim 4 wherein the fibers are in the form of cord when exposed to the gas plasma.
References Cited (Backward Citations)
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US3526583A
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |