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Kynar Pennsalt Vinylidene Fluoride Resin Advertisement
April 6, 1964 Electronics Magazine Article

April 6, 1964 Electronics

April 6, 1964 Electronics Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Electronics, published 1930 - 1988. All copyrights hereby acknowledged.

Did you know that at least originally the term "Wire-Wrap" was - and maybe still a - registered trademark of Gardner-Denver Company? Kynar insulation, whose full name is Kynar polyvinylidene fluoride (PVDF) resin, is most likely a familiar type of insulation due to its widespread use on wire-wrap wire. It had very recently been introduced to the electronics world when this advertisement appeared in a 1964 issue of Electronics magazine. The contemporary name used by its manufacturer, Arkema, is Kynar500®, and the coating's use has expanded well beyond the electronics industry into architectural and mechanical coatings. I did a LOT of manual wire-wrapping on Mil-Spec equipment while working as a technician at Westinghouse Oceanic Division (now Northrop Grumman) in the early and mid 1980s. The massive wire-wrapped board shown in the ad was done by an automated machine. There were times that the guys in my work area (code-named "HK") had to do rework based on an engineering circuit change. Most often it was a nightmare because the manner in which the machines wrapped wires on posts (sometimes three-high) required unwrapping and then re-wrapping dozens of wires because the ones we really needed to access were below a wrap that was at the top of the post. Workmanship standards prohibited (for good reason) unwrapping and then re-wrapping the same wire because the sharp edges of the square posts (which created the gas-tight connections) weakened the wire during straightening. Other than the dread caused by needing to rework them, those machine-wrapped boards looked awesome.

Kynar Pennsalt Vinylidene Fluoride Resin Ad

Machine-wired backplanes for "Burroughs" Computers now use hook-up wire insulated with "Kynar,"* Pennsalt vinylidene fluoride resin. Why "Kynar"? No cold flow or cut-through when wire is pulled tight around sharp corners. "Kynar" is tough ... withstands tension of machine application to backplane. Has U.L. approval for "Burroughs" B-5000 computer operation.

Each "Burroughs" backplane is checked visually, tested electronically. Machine wrapping with Gardner-Denver "Wire-Wrap"† drastically reduces incidence of error; concentrates 100,000 circuits in same space that formerly allowed only 10,000 circuits.

For more data on "Kynar" ... sources of hook-up wire insulated with "Kynar," write Plastics Department, Pennsalt Chemicals Corporation, Three Penn Center, Philadelphia, Pa. 19102.

"Burroughs" is a Registered trademark of Burroughs Corporation.

Kynar ... a fluoroplastic that's tough!

* "Kynar" is a Registered trademark of Pennsalt Chemicals Corporation.

Pennsalt Chemicals

Established 1850

† "Wire-Wrap" is a Registered trademark of Gardner-Denver Company.



Posted February 21, 2019

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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