Process for the production of two-layer textile reinforcement adapted for the production of bituminous sealing sheets for roofing and reinforcement thus obtained

摘要

Prodn. of two layer textile reinforcement for bituminous roof sealing coating consists of taking a non-woven layer and consolidating it by mechanical binding or hydraulic binding e.g. by water jet; then thermostabilising at 180-240, pref. 200-220 degrees C for 5-60, pref. 8-20 secs.. That layer is then assembled with a second mineral fibre, esp. glass fibre, layer by bonding, sewing or knitting. The last two methods are only used when the second layer is a fabric or a mesh. The adhesive for bonding is a thermoplastic or hot-set polymer e.g. polyester, polyamide, polyurethane or EVA, with m.pt. of 160-220 pref. 190-200 degrees C.