US4792645A
Expired / Lapsed
US
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Process for producing electroconductive fibrous shaped-articles
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1985-08-28
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Granted: 1988-12-20
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Expires: 2005-08-28
Abstract
Abstract Disclosed herein is a process for producing electroconductive fibrous shaped-articles comprising the steps of: soaking water-absorptive fibrous shaped-articles in a palladium hydrosol containing a cationic surfactant, an anionic surfactant, a non-ionic surfactant or a mixture thereof, and after (i) drying the thus treated shaped-articles, (ii) washing the thus treated shaped-articles with water or (iii) washing the thus treated shaped-articles and then drying, subjecting the thus obtained, shaped-articles on which colloidal palladium is adsorbed to chemical plating, thereby obtaining the electroconductive fibrous shaped-articles of which fibers thereof are subjected to metallizing plating.
Inventors
- 👤 Yukimichi Nakao
- 👤 Kyoji Kaeriyama
- 👤 Yoshio Suda
- 👤 Tomoyuki Imai
- 👤 Osamu Oze
- 👤 Nanao Horiishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:54
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; D; D06; D06M; D06M11/00; D06M11/83; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3407
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
143 words
A process for producing electroconductive fibrous shaped-articles comprising the steps of: (a) preparing a palladium hydrosol by treating an aqueous solution of a palladium (II) salt with a reductant in the presence of a least a cationic surfactant, an anionic surfactant, a non-ionic surfactant or a mixture thereof, (b) soaking a water-absorptive fibrous shaped-article in the form of paper or non-woven fabrics having the capacity to allow said palladium hydrosol to penetrate into the inner portion of the paper or non-woven fabric being soaked, (c) removing said soaked shaped-article from said palladium hydrosol and treating said soaked shaped-article by either: (i) drying said soaked shaped-article, or (ii) washing said soaked shaped-article with water, or (iii) washing said soaked shaped-article with water and drying said washed soaked shaped-article, and (d) chemical plating said treated soaked shaped-articles of step (c), thereby obtaining electroconductive fibrous shaped-articles.
Claim 2
Dependent Claim
143 words
A process for producing electroconductive fibrous shaped-articles comprising the steps of: (a) preparing a palladium hydrosol by treating an aqueous solution of a palladium (II) salt with a reductant in the presence of a least a cationic surfactant, an anionic surfactant, a non-ionic surfactant or a mixture thereof, (b) soaking a water-absorptive fibrous shaped-article in the form of paper or non-woven fabrics having the capacity to allow said palladium hydrosol to penetrate into the inner portion of the paper or non-woven fabric being soaked, (c) removing said soaked shaped-article from said palladium hydrosol and treating said soaked shaped-article by either: (i) drying said soaked shaped-article, or (ii) washing said soaked shaped-article with water, or (iii) washing said soaked shaped-article with water and drying said washed soaked shaped-article, and (d) chemical plating said treated soaked shaped-articles of step (c), thereby obtaining electroconductive fibrous shaped-articles.
Claim 3
Dependent Claim
68 words
A process according to claim 1 wherein said palladium hydrosol has a concentration of from 0.1 to 5 mg-atom of palladium per liter and said soaked shaped-article has absorbed from 0.025 to 0.20% by weight of colloidal palladium, said removed soaked shaped-article being treated by either (a) washing said soaked shaped article with water or (b) washing said soaked shaped-article with water and then drying said washed shaped-article.
Claim 4
Dependent Claim
23 words
A process according to claim 1, wherein the concentration of said surfactant in said palladium hydrosol is 0.002 to 1% by weight thereof.
Claim 5
Dependent Claim
36 words
A process according to claim 1, wherein said cationic surfactant is stearyltrimethylammonium chloride, hexadecyltrimethylammonium bromide or hexadecylpyridinium chloride; said anionic surfactant is sodium dodecylbenzenesulfonate or sodium dodecylsulfate; and said nonionic surfactant is polyethylene glycol p-nonylphenyl ether.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein the thickness of said water-absorptive fibrous shaped-articles is 0.01 to 20 mm.
Claim 7
Dependent Claim
16 words
A process according to claim 1, wherein said reductant is sodium borohydride, dimethylamine borane or hydrazine.
Claim 8
Dependent Claim
35 words
A process according to claim 1, wherein said chemical plating is carried out by soaking said water-absorptive fibrous shaped-articles, on which colloidal palladium is adsorbed, in an aqueous solution of metal ions containing a reductant.
Claim 9
Dependent Claim
34 words
A process according to claim 7, wherein said aqueous solution of metal ions to be subjected to metallizing plating is an aqueous neutral or alkaline solution of nickel, cobalt, copper or a mixture thereof.
Claim 10
Dependent Claim
14 words
A process according to claim 7, wherein said reductant is sodium hypophosphite or formaldehyde.
Claim 11
Dependent Claim
41 words
A process according to claim 1 wherein said palladium hydrosol has a concentration of from 0.1 to 2 mg-atom of palladium per liter and said soaked shaped-article is removed from said palladium hydrosol before colloidal palladium is absorbed onto said shaped-article.
Claim 12
Dependent Claim
31 words
A process according to claim 10, wherein said water-adsorptive fibrous shaped-articles are papers or non-woven fabrics comprising cellulose, regenerated cellulose, hemp, cotton, wool or synthetic fibers as the constituting fibers thereof.
Claim 13
Dependent Claim
67 words
A process according to claim 1 wherein said palladium hydrosol has a concentration of from 0.1 to 5 mg-atom of palladium per liter and said soaked shaped-article has absorbed from 0.001 to 0.020% by weight of colloidal palladium, said removed soaked shaped-article being treated by either (a) washing said soaked shaped-article with water or (b) washing said soaked shaped-article with water and then drying said washed shaped-article.
Claim 14
Dependent Claim
22 words
A process according to claim 12, wherein said water-absorptive fibrous shaped-articles are papers or non-woven fabrics comprising cellulose, regenerated cellulose or cotton.
Claim 15
Dependent Claim
17 words
A process according to claim 12 wherein said water-absorption fibrous shaped-article is folded prior to said soaking.
Claim 16
Dependent Claim
143 words
Electroconductive fibrous shaped-article prepared by a process comprising the steps of: (a) preparing a palladium hydrosol by treating an aqueous solution of a palladium (II) salt with a reductant in the presence of at least a cationic surfactant, an anionic surfactant, a non-ionic surfactant or a mixture thereof, (b) soaking a water-absorptive fibrous shaped-article in the form of paper or non-woven fabrics having the capacity to allow said palladium hydrosol to penetrate into the inner portion of the paper or non-woven fabric being soaked, (c) removing said soaked shaped-article from said palladium hydrosol and treating said soaked shaped-article by either: (i) drying said soaked shaped-article, or (ii) washing said soaked shaped-article with water, or (iii) washing said soaked shaped-article with water and drying said washed soaked shaped-article, and (d) chemical plating said treated soaked shaped-articles of step (c), thereby obtaining electroconductive fibrous shaped-articles.
Claim 17
Dependent Claim
143 words
Electroconductive fibrous shaped-article prepared by a process comprising the steps of: (a) preparing a palladium hydrosol by treating an aqueous solution of a palladium (II) salt with a reductant in the presence of at least a cationic surfactant, an anionic surfactant, a non-ionic surfactant or a mixture thereof, (b) soaking a water-absorptive fibrous shaped-article in the form of paper or non-woven fabrics having the capacity to allow said palladium hydrosol to penetrate into the inner portion of the paper or non-woven fabric being soaked, (c) removing said soaked shaped-article from said palladium hydrosol and treating said soaked shaped-article by either: (i) drying said soaked shaped-article, or (ii) washing said soaked shaped-article with water, or (iii) washing said soaked shaped-article with water and drying said washed soaked shaped-article, and (d) chemical plating said treated soaked shaped-articles of step (c), thereby obtaining electroconductive fibrous shaped-articles.
Claim 18
Dependent Claim
69 words
Electroconductive fibrous shaped-article according to claim 15 wherein said palladium hydrosol has a concentration of from 0.1 to 5 mg-atom of palladium per liter and said soaked shaped-article has absorbed from 0.025 to 0.20% by weight of colloidal palladium, said removed soaked shaped-article being treated by either (a) washing said soaked shaped article with water or (b) washing said soaked shaped-article with water and then drying said washed shaped-article.
Claim 19
Dependent Claim
79 words
Electroconductive fibrous shaped-article according to claim 15 wherein said palladium hydrosol has a concentration of from 0.1 to 5 mg-atom of palladium per liter and said soaked shaped-article has absorbed from 0.001 to 0.020% by weight of colloidal palladium, said removed soaked shaped-article being treated by either (a) washing said soaked shaped-article with water or (b) washing said soaked shaped-article with water and then drying said washed shaped-article wherein said water-absorption fibrous shaped-article is folded prior to said soaking.
Claim 20
Dependent Claim
24 words
Electroconductive fibrous shaped-article according to claim 15 wherein the concentration of said surfactant in said palladium hydrosol is 0.002 to 1% by weight thereof.
Claim 21
Dependent Claim
37 words
Electroconductive fibrous shaped-article according to claim 15 wherein said cationic surfactant is stearyltrimethylammonium chloride, hexadecyltrimethylammonium bromide or hexadecylpyridinium chloride; said anionic surfactant is sodium dodecylbenzenesulfonate or sodium dodecylsulfate; and said non-ionic surfactant is polyethylene glycol p-nonylphenyl ether.
Claim 22
Dependent Claim
20 words
Electroconductive fibrous shaped-article according to claim 15 wherein the thickness of said water-absorptive fibrous shaped-articles is 0.01 to 20 mm.
Claim 23
Dependent Claim
17 words
Electroconductive fibrous shaped-article according to claim 15 wherein said reductant is sodium borohydride, dimethylamine borane or hydrazine.
Claim 24
Dependent Claim
42 words
Electroconductive fibrous shaped-article according to claim 15 wherein said palladium hydrosol has a concentration of from 0.1 to 2 mg-atom of palladium per liter and said soaked shaped-article is removed from said palladium hydrosol before colloidal palladium is absorbed onto said shaped-article.
Claim 25
Dependent Claim
32 words
Electroconductive fibrous shaped-article according to claim 22 wherein said water-absorptive fibrous shaped-articles are papers or non-woven fabrics comprising cellulose, regenerated cellulose, hemp, cotton, wool or synthetic fibers as the constituting fibers thereof.
Claim 26
Dependent Claim
68 words
Electroconductive fibrous shaped-article according to claim 15 wherein said palladium hydrosol has a concentration of from 0.1 to 5 mg-atom of palladium per liter and said soaked shaped-article has absorbed from 0.001 to 0.020% by weight of colloidal palladium, said removed soaked shaped-article being treated by either (a) washing said soaked shaped-article with water or (b) washing said soaked shaped-article with water and then drying said washed shaped-article.
Claim 27
Dependent Claim
23 words
Electroconductive fibrous shaped-article according to claim 24 wherein said water-absorptive fibrous shaped-articles are papers or non-woven fabrics comprising cellulose, regenerated cellulose or cotton.
Claim 28
Dependent Claim
36 words
Electroconductive fibrous shaped-article according to claim 15 wherein said chemical plating is carried out by soaking said water-absorptive fibrous shaped-articles, on which collodial palladium is absorbed, in an aqueous solution of metal ions containing a reductant.
Claim 29
Dependent Claim
35 words
Electroconductive fibrous shaped-article according to claim 26 wherein said aqueous solution of metal ions to be subjected to metallizing plating is an aqueous neutral or alkaline solution on nickel, cobalt, copper or a mixture thereof.
Claim 30
Dependent Claim
14 words
Electroconductive fibrous shaped-article according to claim 26 said reductant is sodium hypophosphite or formaldehyde.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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