Apr 26, 2010 #1 angeloa Mechanical Apr 26, 2010 1 I purchased a plastics manufacturer and we had excess supply of Zytel 33% glass material that is 10 years old virgin in boxes. Is the material still good???
I purchased a plastics manufacturer and we had excess supply of Zytel 33% glass material that is 10 years old virgin in boxes. Is the material still good???
Apr 26, 2010 #2 patprimmer New member Nov 1, 2002 13,816 If the seals are intact and there is no contamination, it should be mostly OK. It will have absorbed some water from the atmosphere as I doubt it has been stored in a pack with extremely high barrier to moisture transmission. If it is wet it will need to be dryed. This will be fairly difficult as the water will be well soaked into the granules. If it is dried under vacuum, it can be done perfectly without damage, however very few moulders have vacuum dryers. If done in air, it should be in a dehumidifier, but the time and temperature required will cause some oxidation. This oxidation may cause some yellowing and a minor loss of properties. Regards Pat See FAQ731-376 for tips on use of eng-tips by professional engineers & http://eng-tips.com/market.cfmfor site rules Upvote 0 Downvote
If the seals are intact and there is no contamination, it should be mostly OK. It will have absorbed some water from the atmosphere as I doubt it has been stored in a pack with extremely high barrier to moisture transmission. If it is wet it will need to be dryed. This will be fairly difficult as the water will be well soaked into the granules. If it is dried under vacuum, it can be done perfectly without damage, however very few moulders have vacuum dryers. If done in air, it should be in a dehumidifier, but the time and temperature required will cause some oxidation. This oxidation may cause some yellowing and a minor loss of properties. Regards Pat See FAQ731-376 for tips on use of eng-tips by professional engineers & http://eng-tips.com/market.cfmfor site rules
