Asbestos-free thermal protection for powder propulsion units.

摘要

1. An asbestos-free heat shield for use in powder propulsion systems consisting essentially of 100 parts by weight of synthetic rubber and from 50 to 150 parts by weight of a filler material and characterised in that the filler material is comprised of silica and aromatic polyamide fibres and in that it contains at least 15 parts by weight of said fibres.