EP0467639A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Atmospheric pressure plasma surface treatment process
Assignee: C ITOH FINE CHEMICAL Co Ltd
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Filing: 1991-07-17
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Granted: —
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Expires: 2011-07-17
Abstract
Abstract According to this invention, there is provided an atmospheric pressure plasma surface treatment process comprising the steps of introducing a gas in a plasma reaction apparatus having a pair of dielectric-covered electrodes having opposing surfaces on at least one of which is provided with a solid dielectric; performing plasma excitation under atmospheric pressure; and surface treating an object placed between the opposing electrodes, wherein the gas introduced is a gaseous composition consisting essentially of argon, helium and/or ketone. This process makes it possible to quickly imparting hydrophilic nature to surfaces of an object made of a plastic to be treated. The hydrophilic nature given lasts long. <IMAGE>
Inventors
- 👤 Hiroshi Uchiyama
- 👤 Satiko Okazaki
- 👤 Masuhiro Kogoma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
D; D06; D06M; D06M10/00; D06M10/02; D06M10/025; C; C08; C08J; C08J7/00; B; B29; B29C; B29C59/00; B29C59/10; B29C59/12; B29C59/14; B29C2059/145; D06M2101/00; D06M2101/16; D06M2101/18; D06M2101/22; D06M2101/26; D06M2101/30; D06M2101/32; D06M2101/34; D06M2200/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
71 words
An atmospheric pressure plasma surface treatment process comprising the steps of: introducing a gas in a plasma reaction apparatus having a pair of dielectric-covered electrodes having opposing surfaces on at least one of which is provided with a solid dielectric; performing plasma excitation under atmospheric pressure; and surface treating an object placed between the opposing electrodes, wherein the gas introduced is a gaseous composition consisting essentially of argon, helium and/or ketone.
Claim 2
Dependent Claim
31 words
A process as claimed in claim 1, wherein said gaseous composition consists essentially of 90 to 10 % by volume of argon, and 10 to 90 % by volume of helium.
Claim 3
Dependent Claim
31 words
A process as claimed in claim 2, wherein said gaseous composition consists essentially of 80 to 20 % by volume of argon, and 20 to 80 % by volume of helium.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 2, wherein said gaseous composition consists essentially of 60 to 40 % by volume of argon, and 40 to 60 % by volume of helium.
Claim 5
Dependent Claim
40 words
A process as claimed in claim 1, wherein said gaseous composition consists essentially of 90 to 10 % by volume of argon, 0 to 89.9 % by volume of helium, and 0.1 to 20 % by volume of a ketone.
Claim 6
Dependent Claim
40 words
A process as claimed in claim 5, wherein said gaseous composition consists essentially of 80 to 20 % by volume of argon, 19 to 65 % by volume of helium, and 1 to 15 % by volume of a ketone.
Claim 7
Dependent Claim
40 words
A process as claimed in claim 5, wherein said gaseous composition consists essentially of 60 to 40 % by volume of argon, 30 to 59 % by volume of helium, and 1 to 10 % by volume of a ketone.
Claim 8
Dependent Claim
32 words
A process as claimed in claim 1, wherein said gaseous composition consists essentially of 99.9 to 10 % by volume of argon, and 0.1 to 90 % by volume of a ketone.
Claim 9
Dependent Claim
32 words
A process as claimed in claim 9, wherein said gaseous composition consists essentially of 99 to 80 % by volume of argon, and 1 to 20 % by volume of a ketone.
Claim 10
Dependent Claim
27 words
A process as claimed in any one of claims 1 and 5 to 9, wherein said ketone is an aliphatic ketone having 3 to 6 carbon atoms.
Claim 11
Dependent Claim
16 words
A process as claimed in claim 10, wherein said ketone is acetone or methyl ethyl ketone.
Claim 12
Dependent Claim
12 words
A process as claimed in claim 11, wherein said ketone is acetone.
Claim 13
Dependent Claim
27 words
A process as claimed in claim 1, wherein said plasma excitation is performed using an Alternating current power source of a frequency of 200 to 100,000 Hz.
Claim 14
Dependent Claim
27 words
A process as claimed in claim 13, wherein said plasma excitation is performed using an Alternating current power source of a frequency of 1,000 to 10,000 Hz.
Claim 15
Dependent Claim
17 words
A process as claimed in claim 1, wherein said object is made of a synthetic polymer material.
Claim 16
Dependent Claim
16 words
A process as claimed in claim 15, wherein said object is made of a plastic film.
Claim 17
Dependent Claim
16 words
A process as claimed in claim 16, wherein said plastic film is a heat-shrinkable plastic film.
Claim 18
Dependent Claim
19 words
A process as claimed in claim 15, wherein said object is a synthetic fiber or a synthetic fiber cloth.
References Cited (Backward Citations)
No citation records indexed.
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