Sheet sealing material

Details Sheet sealing material Sheet sealing material

F - Mech Eng,Light,Heat,Weapons

16

J

277/71

F16J 15/10 (2006.01) C09K 3/10 (2006.01)

Patent

CA 2035358

ABSTRACT Known sheet sealing material from which gaskets can be cut for sealing against an aggressive chemical such as sulphuric acid has surfaces of a sintered PTFE resin in which is dispersed an inert inorganic filler (eg ground quartz, against sulphuric acid) substantially all of which is of particle size less than 106 pm. According to the invention, there is interposed between said surfaces a core of sintered PTFE resin in which is dispersed relatively coarse inert inorganic filler ie filler of which at least 17.5% by weight, and preferably 20-35% by weight is of particle size greater than 106 µm. The remainder of the core filler is of particle size below 106 µm.

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