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Production Of Conductive Sponge Rubber

IP.com Disclosure Number: IPCOM000095452D
Original Publication Date: 1964-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Palmateer, PH: AUTHOR [+2]

Abstract

This method is for producing conductive sponge rubber. The ultimate product exhibits very low electrical resistance and still maintains its original resiliency. (1) Clip a neoprene or other foam rubber sponge to a wire rack in such a manner as to hold it in strain from all sides. (2) Soak the sponge for five minutes in a 150 degrees F AL-CHELATE* alkaline solution. (3) Rinse until there is only clear water running off the sponge. (4) Soak in 10% sulphuric acid solution for one minute. (5) Rinse thoroughly, (6) Soak the sponge in a 30% hydrochloric acid solution for three minutes. (7) Remove and let the sponge drain for one minute. (8) Soak in CATALYST 6F* for ten minutes and cause the sponge to be squeezed at least once each minute. (9) Rinse until water running off the sponge is clear. (10) Soak in ACCELERATOR No.

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Production Of Conductive Sponge Rubber

This method is for producing conductive sponge rubber. The ultimate product exhibits very low electrical resistance and still maintains its original resiliency.
(1) Clip a neoprene or other foam rubber sponge to a wire rack

in such a manner as to hold it in strain from all sides.
(2) Soak the sponge for five minutes in a 150 degrees F

AL-CHELATE* alkaline solution.
(3) Rinse until there is only clear water running off the sponge.
(4) Soak in 10% sulphuric acid solution for one minute.
(5) Rinse thoroughly,
(6) Soak the sponge in a 30% hydrochloric acid solution for three

minutes.
(7) Remove and let the sponge drain for one minute.
(8) Soak in CATALYST 6F* for ten minutes and cause the sponge to be squeezed at least once each minute.
(9) Rinse until water running off the sponge is clear.
(10) Soak in ACCELERATOR No. 19* for two minutes.
(11) Rinse thoroughly and place in Shipley electroless copper

solution mixed as follows: 1 part copper mix 3A, 1 part

copper mix 3B, and 6 parts distilled water. Squeeze the

sponge once each minute.
(12) Continue step 11 for two hours.
(13) Repeat steps 4... 12.
(14) Electroplate the sponge for fourteen minutes at 15 amperes

per square foot in a UNICHROME* pyrophosphate copper bath.
(15) Rinse the sponge thoroughly until all traces of the blue

copper bath are rinsed out of it.
(16) Electroplate a flash of gold on the sponge for antioxident

purposes (three minutes at 5 amperes per square foot)....