Packing material and gland packing using the material and process for packing material
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United States of America Patent
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Issued Date -
Oct 20, 2005
app pub date -
Mar 11, 2005
filing date -
Aug 28, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
6 The present invention relates to the versatile packing material that has enough lubricating property, durability and sealing ability even if they are used under high PV value (speed of rotating shaft is more than 25 m/sec) to a shaft seal part of a fluid machinery where the rotating shaft rotates with high speed or under very high pressure to a seal of shuttle slide part of fluid machinery, and are high quality in durability, withstand pressure ability, heat resistance, lubricating property (low torque ability etc.), chemical resistance, sealing ability, low-emission ability and reducing production cost etc., further prevent electric corrosion to contact metal such as valve rod; packing material, wherein at least any one of expansive graphite thread, carbonized fiber thread, carbon fiber thread, aramid resin fiber thread, phenol resin fiber thread, glass fiber thread, soogee, asbestos fiber thread and bundle of sprit carbon fiber is selected as base material, and in twisted periphery of the base material, a tape made of polytetrafluoro-ethylene is winded.
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