Tianjin Huayin Instrument Technology Construction Engineering Co., Ltd. QSX-23 low temperature flexibility tester applies to the upper and lower surfaces of asphalt roofing membrane temperature by providing test or continue in a different temperature range measured as the temperature of the polarity of the temperature of the cold-formed. Also be used for the determination of the minimum cold bending temperature or cold bending temperature measuring products prescribed. Purposes: QSX-23 type low temperature flexibility tester is applied to the upper and lower surfaces of asphalt roofing waterproofing membrane specified temperature test, or continue to be measured at different temperature ranges, as the temperature of the polarity of the temperature of the cold-formed. Also be used for the determination of the minimum cold bending temperature or cold bending temperature measuring products prescribed. For example: the determination of the variation of the performance of the products after accelerated aging. First, the main structure and working principle of the instrument by electrical, mechanical bending device and electrical controls. The working principle of the instrument after the 180 ° bending of the specimen placed in the frozen liquid on the mechanical bending device (360 ± 40) mm / min speed, inspection test pieces coated caprock existing cracks. Second, the main technical parameters of motor power: 80W; Voltage: 220V; 50Hz sample specifications: (150 ± 1) mm × (25 ± 1) mm specimen thickness: 1mm to 5mm each time the maximum number of test standard sample: 6 test Speed: (360 ± 40) mm / min test temperature range: -40 ℃ ~ 50 ℃ test relative humidity: (90 to 95)% Temperature measurement accuracy: ± 0.5 ℃