US4155826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for surface treating molded articles of fluorine resins
Assignee: Nitto Denko Corp
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Filing: 1977-10-05
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Granted: 1979-05-22
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Expires: 1997-10-05
Abstract
Abstract The surface of a molded article of a fluorine resin is treated to provide better adhesion by sputter etching it in an atmosphere whose pressure is maintained at about 0.0005 to about 0.5 Torr.
Inventors
- 👤 Junkichi Nakai
- 👤 Kazuo Fukunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:25
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; B; B29; B29C; B29C59/00; B29C59/16; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0872; C08J2327/00; C08J2327/02; C08J2327/12; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/034; H05K3/00; H05K3/38; H05K3/381
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
181 words
In a pressure sensitive adhesive tape comprising a backing having thereon a pressure sensitive adhesive layer, the improvement which comprises said backing comprising a fluorinated olefin polymer sheet which has been surface treated by subjecting the polymer to sputter etching by bringing the polymer sheet into contact with a cathode in a chamber internally equipped with an anode and the cathode with the minimum distance between the anode and the cathode being substantially 1/√P, wherein P is the pressure in Torr, said chamber being capable of being evacuated to provide a vacuum therein, and in this state applying a high frequency of several hundred KHz to several ten MHz alternating current between the anode and the cathode while maintaining the pressure and temperature of the gaseous atmosphere in the chamber at about 0.0005 to about 0.5 Torr and about -10° C. to about 40° C., with the product of the discharge power for the sputter etching and the treating time being about 1 to about 1,000 watt. sec/cm2, to thereby sputter etch the polymer sheet in the resulting cathode dark space.
Claim 2
Dependent Claim
181 words
In a pressure sensitive adhesive tape comprising a backing having thereon a pressure sensitive adhesive layer, the improvement which comprises said backing comprising a fluorinated olefin polymer sheet which has been surface treated by subjecting the polymer to sputter etching by bringing the polymer sheet into contact with a cathode in a chamber internally equipped with an anode and the cathode with the minimum distance between the anode and the cathode being substantially 1/√P, wherein P is the pressure in Torr, said chamber being capable of being evacuated to provide a vacuum therein, and in this state applying a high frequency of several hundred KHz to several ten MHz alternating current between the anode and the cathode while maintaining the pressure and temperature of the gaseous atmosphere in the chamber at about 0.0005 to about 0.5 Torr and about -10° C. to about 40° C., with the product of the discharge power for the sputter etching and the treating time being about 1 to about 1,000 watt. sec/cm2, to thereby sputter etch the polymer sheet in the resulting cathode dark space.
Claim 3
Dependent Claim
16 words
The pressure sensitive adhesive tape of claim 1 wherein the fluorinated olefin polymer is α-fluoro-olefin polymer.
Claim 4
Dependent Claim
51 words
The pressure sensitive adhesive tape of claim 2 wherein said α-fluoro-olefin polymer is a polymer or copolymer having a molecular weight of about 1 × 10 4 to about 1 × 10 7 and a fluorine content of about 40 to about 76 weight % based on the polymer or copolymer.
Claim 5
Dependent Claim
20 words
The pressure sensitive adhesive tape of claim 1 wherein the fluorinated olefin polymer is polyetrafluoroethylene or a fluoroethylene propylene copolymer.
Claim 6
Dependent Claim
182 words
A process for preparing a pressure sensitive adhesive tape comprising surface treating a fluorinated olefin polymer sheet by subjecting said polymer sheet to sputter etching by bringing said polymer sheet into contact with a cathode in a chamber internally equipped with an anode and the cathode with the minimum distance between the anode and the cathode being substantially 1/√P, wherein P is the pressure in Torr, said chamber being capable of being evacuated to provide a vacuum therein, and in this state applying a high frequency of several hundred KHz to several ten MHz alternating current between the anode and the cathode while maintaining the pressure and temperature of the gaseous atmosphere in the chamber at about 0.0005 to about 0.5 Torr and about -10° C. to about 40° C., with the product of the discharge power for the sputter etching and the treating time being about 1 to about 1,000 watt. sec/cm 2 , to thereby sputter etch the molded article in the resulting cathode dark space, and providing a pressure sensitive adhesive layer on said resulting surface treated polymer sheet.
Claim 7
Dependent Claim
182 words
A process for preparing a pressure sensitive adhesive tape comprising surface treating a fluorinated olefin polymer sheet by subjecting said polymer sheet to sputter etching by bringing said polymer sheet into contact with a cathode in a chamber internally equipped with an anode and the cathode with the minimum distance between the anode and the cathode being substantially 1/√P, wherein P is the pressure in Torr, said chamber being capable of being evacuated to provide a vacuum therein, and in this state applying a high frequency of several hundred KHz to several ten MHz alternating current between the anode and the cathode while maintaining the pressure and temperature of the gaseous atmosphere in the chamber at about 0.0005 to about 0.5 Torr and about -10° C. to about 40° C., with the product of the discharge power for the sputter etching and the treating time being about 1 to about 1,000 watt. sec/cm 2 , to thereby sputter etch the molded article in the resulting cathode dark space, and providing a pressure sensitive adhesive layer on said resulting surface treated polymer sheet.
Claim 8
Dependent Claim
30 words
The process of claim 5, wherein during the surface treatment the sputter etching is carried out with the introduction of said atmosphere gas from external means during the discharge treatment.
Claim 9
Dependent Claim
31 words
The process of claim 5, wherein during the surface treatment the sputter etching is carried out without the introduction of said atmosphere gas from any external means during the discharge treatment.
Claim 10
Dependent Claim
15 words
The process of claim 5, wherein the high frequency current has a frequency of 13.56MHz.
Claim 11
Dependent Claim
13 words
The process of claim 5, wherein the fluorinated olefin polymer is α-fluoro-olefin polymer.
Claim 12
Dependent Claim
17 words
The process of claim 5, wherein the fluorinated olefin polymer is polytetrafluoroethylene or a fluoroethylene propylene polymer.
Claim 13
Dependent Claim
16 words
The process of claim 5, wherein the pressure of said atmosphere is 0.001 to 0.15 Torr.
Claim 14
Dependent Claim
16 words
The process of claim 5, wherein the pressure of said atmosphere is 0.005 to 0.01 Torr.
Claim 15
Dependent Claim
28 words
The process of claim 5, wherein the product of the discharge power for the sputter etching and the treating time is 5 to 500 watt. sec/cm 2 .
Claim 16
Dependent Claim
28 words
The process of claim 5, wherein the product of the discharge power for the sputter etching and the treating time is 80 to 300 watt. sec/cm 2 .
References Cited (Backward Citations)
US3406820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |