Rigid polymer laminate with smooth outer surface for stamping - useful as printed circuit board substrate with glass fibre filled core of thermoplastic aryl ether¨ sulphone¨ polymer
Laminate has a smooth outer surface contg. thermoplastic polymer (I) free from fibrous or particulate filler and another layer of filler (I), produced separately. The filler (II) comprises mineral filler(s) and/or glass fibres; and (I) has high enough thermal and chemical stability to fix electrical...
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