FIBROUS BASE FOR COMPOSITE INSULATING AND/OR ROOFING MATERIAL Russian patent published in 1998 - IPC

FIELD: construction engineering. SUBSTANCE: this particularly relates to production of fibrous nonwoven base for composite and/or roofing materials. Fibrous base in given case contains nonwoven mineral material which is made up of longitudinal, lateral, and inserting threads. Used as nonwoven mineral material is combination knitting and inserting material based on glass and basaltic threads with mass ratio of threads being equal to (1.0-3.5):1.0 respectively. In addition, used as longitudinal threads are complex threads, and used as lateral threads are basaltic twisted complex threads, and used as inserting threads are glass twisted complex threads. In this case, ratio of longitudinal threads and lateral threads as to mass is respectively equal to 1.0:1.0, and mass ratio of longitudinal threads and inserting threads is respectively equal to 0.4:1.0. Aforesaid arrangement increases relative lengthening of material at alternating temperature loads. EFFECT: higher efficiency. 5 cl