Rubber Low-Temperature Brittleness Tester China Manufacturer
Brittleness Temperature Tester is intended to determine the lowest temperature at which plastic or rubber materials do not exhibit brittle failure or the temperature at which half of the specimens used in a test fail when subjected to strikes under specified conditions.
The low-temperature brittleness tester can be used to make comparative identification of functional performance for the non-rigid plastic and other elastic materials under the low-temperature condition and measure the pros and cons of low-temperature properties of different rubber materials and compound rubbers with different formulas. Therefore, the brittleness temperature tester is one of the vital rubber instruments in the quality inspection of scientific research and controlling the production process.
This testing machine comprises a refrigeration system, temperature control device, temperature-measuring device, heat-transfer medium, cooling bath, automatic alarm device, etc.
After turning on the refrigerating switch, the compressor starts working to enter into the refrigerating state. When it is close to the set temperature, the heating device in the cooling tank starts to provide heat in proportion to balance the excess cold produced by the refrigeration system to achieve the purpose of constant temperature. Stirring can continuously circulate the cooling medium in the cooling bath to ensure the uniformity of temperature.
Test Principle
A test piece is clamped in the clamp and immersed into the constant low-temperature container with the freezing medium to precool for 5 minutes. A striking edge is delivered to impact the specimen at the linear velocity of 2 ± 0.2 m / s. The operator examines each test piece to determine whether or not it has failed. According to different results, the operator lowers or raises the temperature of the cooling medium and continues the test until the brittleness temperature of the test sample is measured.
Test Standards
ISO 812 Rubber, vulcanized or thermoplastic determination of low temperature brittleness
ISO 974 Plastics determination of the brittleness temperature by impact
ASTM D746 Brittleness temperature of plastics and elastomers by impact
JIS K6261 Rubber vulcanized or thermoplastic determination of low temperature properties
Main Technical Parameters
| Model | AT-R7007 |
| Temperature range | RT to -60°C / -70°C / -80°C (optional) |
| Test Piece clamp (2 options available) |  |
| Striking edge (2 options available) | Option 1: Radius of striking edge: 1.6±0.1mm, Clearance from striker to the clamp at impact: 6.4±0.3mm, Clearance between th striker and the sample clamp at impact: 6.4±0.3 mm, Separation between the point of impact of the striking edge and sample clamp: 8±0.3 mm
Option 2: Radius of striking edge: 1.6±0.1mm, radius of lower jaw of clamping device: 4.0±0.1mm, Distance between point of impact of striking eged and clamping device: 3.6 ± 0.1 mm, Clearance between outside of striking edge and clamping device: 2.0 ± 0.1 mm |
| Striking speed | 2.0±0.2m/s |
| Refrigerating method | Compressor refrigeration |
| Heat-transfer medium | Ethanol or other non-freezing liquid |
| Stir power | 15W |
| Power supply | 1 Phase AC 220V 50Hz 3kW |
| Air supply | 0.4 ~ 0.7Mpa |
Rubber Embrittlement Tester Features
- Fabricated from rigid steel material.
- Optional with machines with different low temperatures.
- Allows users to preset the medium temperature and immersion time.
- Automatically deliver a strike to the test pieces at a specifed linear speed once the immersion time is up.
- Accurate control for the temperature of the medium.
- The new type of compression refrigeration is applied to ensure smooth and quick cooling.
- Digital screens are equipped to show the temperature and time in real-time.
- A stirrer moves the liquid to ensure a uniform temperature in the liquid medium.
- Compatible with various liquid mediums.
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