The testing system in the rubber industry has its distinctive characteristics—besides the general tests for polymer materials, there are also specific tests for rubber processing performance and vulcanization properties. These two tests are the core equipment that sets rubber labs apart from other material labs.

Processing performance testing: The Mooney viscometer is like the "ID card" of the rubber industry—Mooney viscosity ML(1+4)100℃ is the first indicator for testing raw rubber and compounded rubber, directly affecting subsequent mixing, calendering, and extrusion processes. The Mooney scorch time evaluates the processing safety of the rubber.

Vulcanization property testing: The rotorless vulcanizer (MDR) is a key instrument for rubber formulation development and QC. It provides crucial parameters like minimum torque ML (reflecting rubber flow), maximum torque MH (reflecting crosslink density), ts1/ts2 (scorch time), and t90 (optimum vulcanization time). Rubber engineers use this data to determine the best vulcanization temperature and time.

General material performance testing: DSC is used to measure the Tg of rubber (related to cold resistance) and vulcanization reaction heat, TGA accurately measures carbon black and calcium carbonate content, and universal testing machines measure tensile strength, elongation at break, tear strength, and hardness. For seals and shock-absorbing products, compression set tests and dynamic fatigue tests are also essential.

Dehuisci (www.dehuisci.com) provides complete testing equipment solutions for the rubber industry. Inquiries: 0512-67071902.