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UT2064 Rubber low-temperature brittleness testing machine is to determine the highest temperature of vulcanized rubber under specified conditions when the sample is damaged by impact, that is, the brittle temperature, which can be used by non-rigid plastics and other elastic materials under low temperature conditions for comparative identification. It can determine the brittle temperature and low temperature performance of vulcanized rubber of different rubber materials or different formulations. Therefore, it is indispensable in terms of quality inspection of scientific research materials and their products, and control of production processes.
This instrument is designed according to GB/T5470-2008 plastic impact embrittlement temperature test method, GB/T 1682-2014 national standard for determination of low-temperature brittleness of vulcanized rubber (single sample method), and is the latest developed compressor refrigeration equipment.
This equipment adopts cascade compressor refrigeration technology, using the principle of heat balance and circulating stirring to achieve automatic uniform cooling and constant temperature of the sample, which can fully meet the temperature control indicators stipulated by the national standard GB/T229-94. ISO 812; ISO 974. ASTM D 2137，ASTM D746
Structure principle:
1. Lifting clamp: The lifting clamp is composed of a cylinder with a clamp and a cylinder block. The distance from the impact part of the specimen to the lower end of the gripper is 11.0±0.5mm.
2. Impact device: The impact device is composed of an impact device and an impact cylinder.
3. Impactor: The weight of the impactor is 200±20g, and its working stroke is 40±1mm. When the impact cylinder is in the reset state, the distance from the end of the impactor to the specimen is 25±1mm.
4. Refrigeration medium: compressor refrigeration.
Model | UT2064 |
Temperature control range | -70°C (compressor refrigeration) |
Cooling speed | 0°C~-30°C about 1.5°C/min -30°C~-40°C, about 1°C/min -40°C~-60°C, about 0.7°C/min |
After constant temperature, the temperature fluctuation within 3min of the test | <±0.5 °C |
The distance from the center of the impactor to the lower end of the gripper | 11±0.5mm |
Test sample numbers | 5 pcs for A method; 15 pcs for B method: |
Impact speed | 2m/s±0.2m/s |
Maximum dimensions | 720×700×1380mm (length× height × width) |
Cold well volume | 700ml |
Cooling medium | ethanol or other non-freezing liquid |
Stirring motor Power | 1100W |
Working power supply | 220V~240V, 50Hz |
ISO 812:2017
Rubber, vulcanized or thermoplastic — Determination of low-temperature brittleness
ISO 974:2000
Plastics — Determination of the brittleness temperature by impact
ASTM D2137-11(2018)
Standard Test Methods for Rubber Property—Brittleness Point of Flexible Polymers and Coated Fabrics
ASTM D746-24
Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact