| 摘要 |
An overlay material is described which extends the advantages of materials containing PTFE to the extent that they may be more heavily loaded without its being necessary to resort to the use of lead or lead compounds. The overlay material, which may comprise as its matrix material PTFE or PTFE combined with other fluorothermoplastics or a matrix material not comprising PTFE, contains at least one powder-form polyaramid, the content of which, based on the total amount of PTFE or of the mixture of PTFE and the other fluorothermoplastics and the polyaramid, amounts to 10-50 vol. %. A composite multilayer material is also described which comprises an overlay consisting of an overlay material of the above type.
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