Air heated surfaces - prepd by inserting perforated tube into bonded rubber granulate
Prepn. of an air heated surface from rubber and/or tyre granulates as well as a casting resin comprises inserting a perforated plastic pipe into the above mass, hardening, opt. with moulding, and connecting to a hot air blower. The casting resin is a polyurethane prepd. from polyethers or polyesters...
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