... longitudinal3040-transverse6cold flexibility,°C-18-25-18-25no crack7tear resistance ,N≥longitudinal250350250350transverse1702008phytotrons accelerating ageingappearancefirst classno slipping ,no flowing, ... -transverse6cold flexibility ,°C-5-15-5-15no crack7tear resistance,N≥longitudinal250350250350transverse1702008phytotrons accelerating ageingappearancefirst classno slipping ,no flowing, ...