Quality Testing
1) Mooney Viscoscity Test
Measurement of viscosity with the mooney instrument is important in the release and acceptance testing of rubber polymers. The main requirements of this test method is that it should give consistent result.
The main purpose of Mooney Viscosity test is to test the viscosity of rubber and the resistance to the flow of the rubber. If the viscosity and the resistance to flow is high, the compound will be difficult to process. This means slowing down of production.
2) Density Reading Test
The purpose of the density test is to reaffirm that the correct ingredients are used in the right amount in accordance with the specifications provided for the particular masterbatch and compound.
3) Rheometer Test
This test method describes how rheometer may be used to measure the rheological characteristics of rubber. The test method covers the use of a rheometer for the measurements of the flow properties of rubber compound.
The test is conducted to identify the processing safety of the compounds. It discovers how fast the compounds can be cured at specific temperature.
4) Tensile Properties Test
Tensile Properties is one of the most important aspect of qualifying a compound.
Tensile testing is to determine by the force requires to break the test specimen and records the distance the test specimen has elongated until it breaks (failure).
5) Hardness Test
The Durometer is the International Standard for the hardness measurement of rubber. The test is conducted to ensure the hardness of the compound falls within either our specifications or customer’s specifications. If the hardness is too low, the mileage obtained from the cured rubber will be lesser, vice versa. if the hardness is too hard , cracks loss of traction will apparent.
6) Compression Set Testing
This test is used to determine the ability of rubber compound to retain elastic properties after prolonged compressive stress for a set time period and temperature. This test is particularly useful for application in which the rubber products would be in a constant pressure/release state, such as machinery mountings, vibration dampers and steel.
7) Carbon Black Dispersion Test
Some important physical properties of the rubber compound are influenced significantly by the degree of carbon black dispersion within the compound, for example tensile strength, abrasion resistance, un-dispersed carbon black weakens the rubber product while forming structural (flaws at point of concentration). Tread compound with poor dispersion tends to give lower mileage then stocks with good dispersion.
8 ) Abrasion Resistance Testing
Abrasion Resistance is an important performance factor for many rubber products, tyres, conveyor belt & footwear. This test is capable of measuring the resistance to abrasion, including uniformity of wear behavior, under abrasive frictional service conditions. It estimate the relative abrasion & resistance of a rubber compound and is therefore suitable for comparative testing, quality control, specification compliance testing and Research and Development.
9) Accelerated Ageing Test
Accelerated ageing test is designed to estimate the relative resistance of rubber compound to deterioration with the passage of time. The test specimen is subjected to control deteriorating influence for definite periods, after which the tensile strength, elongation at break & hardness are measured & compared with the corresponding properties of the unaged rubber.
