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Roofing asphalt is reinforced with thick non-woven fibres - esp. of polypropylene giving strain capacity without cracking
Roofing asphalt is reinforced with thick non-woven fibres - esp. of polypropylene giving strain capacity without cracking
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机译:屋面沥青用厚实的非织造纤维加固-特别是。聚丙烯提供应变能力而不会破裂
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摘要
An asphalt for roofing comprises a basic material in the form of bulky non-woven fibre mat constituted of tangled, endless filaments of synthetic fibres, possessing appreciable strength, and asphalt, with which this material is uniformly and completely saturated and coated on both sides. The material possesses appreciable strength and also strain capability enabling it to follow the movements of the underlying roof structure. Specifically the non-woven is made by a needle quilting and perforating process. The pref. endless fibres are polypropylene fibres.
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