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  • Users: TedinCalif
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  1. TedinCalif

    NBR tearing - material identification

    Hi, I have some failures of a loudspeaker surround - actually most of this batch - it is a half roll (semi-circle). When the material is folded it breaks like a metal. Also, I can tear it like paper - does not seem to have many rubber qualities. I am trying to determine if the cause is the...
  2. TedinCalif

    ABS and 600 hr UV testing/stablizers

    Hi, I have a cusotmer who is making white ABS marine speaker grilles - they are yellowing in use. The Asian vendor is mixing in his own UV stabizer (0.48%). I assume this is not the way to do it. Rather, buy a ABS UV stabilzed molding compound that has proper uV ratings. Anyone provide some...

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