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Topic: Small help with Elastomers?  (Read 1694 times)

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Offline Gioware

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Small help with Elastomers?
« on: January 31, 2014, 10:51:31 AM »

I am having hard time finding materials with these features:

1. FPM/FKM/Viton Rubber compound

Tensile strength: 2.4 MPa (350Psi)
Elongation at break: 140%
Shore A hardness (Durometer): 44-61 Shore A
Color: Gray beige
Temperature: -20C +250C
Resistance: Ozone, UV, high temperatures
Usage: rings gaskets plates tubes

Frost resistance by elastic recovery after compression at 60C: 0.75
Residual strain at 20% compression in air at 200C for 24 h: 70% (not more)

2. Nitrile/Neoprene mix compound

Tensile strength: 8.8 MPa
Elongation at break: 250%
Shore A hardness (Durometer): 55-67 Shore A
Temperature: -55C +100C
Resistance: Gasoline, fuel oils, industrial oils
Usage: shaped and unshaped rubber products

3. Synthetic nitrile rubber mixture

Tensile strength: 8.8 MPa
Elongation at break: 350%
Shore A hardness (Durometer): 62-74 Shore A
Brittleness temperature limit: -25C
Temperature: -30C +100C
Resistance: Gasoline, fuel oils, industrial oils, industrial water, inorganic acids, alkalis
Usage: molded rubber parts

Any brand names would be much appreciated


Offline Enthalpy

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Re: Small help with Elastomers?
« Reply #1 on: February 01, 2014, 07:19:12 PM »
Not exactly your query, but...

1. Viton is a tradename by Du Pont for a perfluoroelastomer.

You want a ring gasket: your choice will be determined by the ring supplier, won't it? So I suggest to ask ring manufacturers. Their job is difficult enough that they experiment little with materials, so your whole choice is in their catalogues.

Or are you planning to produce the rings? Then, get your inspiration from their catalogues.

99. If you read German, I emphatically recommend you a handbook (89€): Kunststoff-Tabellen, by Bodo Carlowitz. Very detailed usage and production properties, all polymer and elastomer variants, trade names. Used or older ones are uncommon, alas.

If you read French, get some access to the Techniques de l'ingénieur, one of the volumes about Plastiques. Complete lists of trade names, direct and reverse; some synthetic properties. At some 3000€ a volume, you can find them at the French and the European patent offices in France, and at La Villette's library.

Well, it's just like for mechanical engineering, fluid mechanics and a few more: to have good books, learn German :)

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