The ozone aging test chamber is suitable for non-metallic materials and rubber products such as vulcanized rubber, thermoplastic rubber, cable insulation sheaths, etc., which are exposed to air with a constant concentration of ozone in a sealed and non light environment and a constant temperature test chamber to detect the degree of cracking or other performance changes on the surface of the sample, in order to evaluate the ozone aging resistance of rubber.
Compliant with standards:
The ozone aging test chamber complies with national standards such as GB/T7762 "Static Tensile Test for Ozone Cracking Resistance of Vulcanized Rubber or Thermoplastic Rubber", GB/T3642 Dynamic Tensile Test Method, GB/T2951.5 Special Test Methods for Elastic Mixtures Section 1: Ozone Resistance Test, GB/T2951.21 Special Test Methods for Elastic Mixtures - Ozone Resistance Test, ASTM D1149 Rubber Ozone Aging Standard, ASTM-D1171 Rubber Deterioration Standard Test Method - Outdoor or Indoor Surface Ozone Cracking, ASTM-D3041, etc.
Control system:
1. The temperature and humidity instrument adopts a fully imported high-definition LCD screen display with touch buttons.
2. P.I.D microcomputer S S. R temperature and humidity controller.
3. Accuracy: 0.1 ºC, Resolution: ± 0.1 ºC, Temperature Sensor: PT100 Platinum Resistance Tester.
4. It has the function of automatic calculation, which can reduce the inconvenience caused by manual setting.
5. Ozone concentration control adopts imported Siemens PIC programmable module.
Heating, humidification, and dehumidification system:
1. The heating adopts a far-infrared nickel alloy high-speed heating electric heater.
2. The humidification adopts a built-in boiler steam humidifier and a far-infrared stainless steel high-speed heating electric heating tube.
3. Dehumidification adopts the evaporator coil dew point temperature laminar contact dehumidification method.
Refrigeration system:
1. Compressor: Fully enclosed original French Taikang.
2. Cooling method: air-cooled type.
3. The heating and cooling systems are completely independent.
4. The dry filter, refrigerant flow window, repair valve, oil separator, solenoid valve, and storage tank are all imported original parts.
Ozone system:
1. The ozone generator adopts a silent discharge tube. The ozone generator has the characteristics of small noise volume and high purity.
2. Electrode cooling method: air-cooled, ozone generation gas supply source: direct air.
3. The ozone detection probe consists of an imported British CT electrochemical sensor, housing, electronic circuit board, shielded wire, etc.
4. Ozone detection probe output signal: 4-20mA, ozone detection probe acquisition accuracy: ≤± 5% F.S.
Box material:
1. The inner liner is made of high-quality mirrored stainless steel plate (SUS304).
2. The shell is made of high-quality A3 steel plate, and the surface of the shell is treated with spray coating, making it more smooth and beautiful.
3. Install (one layer x 6) rotating test racks in the studio.
4. The insulation material adopts high-density glass fiber cotton with a thickness of 100mm.
5. The temperature cycling system adopts a temperature resistant low-noise air conditioning motor and a multi blade centrifugal fan.
6. A double-layer high-temperature resistant high tensile sealing strip is used between the door and the box to ensure the sealing of the testing area.
7. The ozone test specimen rack is divided into static tensile test specimen rack and dynamic tensile test specimen rack.
8. The observation window is made of multi-layer insulated tempered glass, with a laminated conductive film on the inside and equipped with lighting fixtures.
9. The bottom of the machine adopts high-quality fixed PU movable wheels.
Static tensile test:
The standard for static tensile testing stipulates that the two ends of the specimen are clamped on a dedicated fixture, and one type of elongation is selected for stretching, generally 20%. The fixture is installed on a rotating sample holder, with a sample holder speed between (20-25) mm/S. The test is conducted at a temperature of (40 ± 2) ºC, a relative humidity of no more than 65%, and a specified ozone concentration. After a specified time, the cracking condition of the specimen is checked. The general selection of ozone concentration is (50 ± 5) × 10-8.
Dynamic tensile test:
The standard for dynamic tensile testing stipulates that the specimen fixture can automatically stretch and reset the specimen, with a stretching frequency of 0.5 ± 0.025Hz. The specimen is clamped at both ends on a dedicated fixture, and the specimen is cyclically stretched from 0 to the maximum elongation. The fixture is installed on a rotating specimen holder, with a rotation speed of (20-25) mm/S. At a temperature of (40 ± 2) ºC, a relative humidity of not more than 65%, and a specified ozone concentration, the fixture is cyclically stretched and reset and rotated with the specimen holder for testing. After a specified time, the cracking condition of the specimen is checked. The general selection of ozone concentration is (50 ± 5) × 10-8. Dynamic tensile testing is divided into continuous dynamic tensile testing and intermittent dynamic tensile testing.
Protection system:
Protection against overheating, short circuit, leakage, refrigeration unit overpressure, controller power outage memory, etc.
11, Equipment usage conditions:
1. Environmental temperature: 5 ºC~30 ºC, environmental humidity: ≤ 85% R.H.
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