"Choose the right hardness and use the right method" - the excellent performance of low-pressure modified fluorosilicone rubber not only comes from the material itself, but also depends on scientific selection, processing and storage methods. From understanding the hardness difference between 40A and 70A to mastering the key parameters of the vulcanization process, these details determine the protection effect of the final product.

First of all, choose the right "hardness partner". The product provides four hardness options: 40A, 50A, 60A and 70A, just like erasers of different hardness. The hardness determines the applicable scenarios: 40A is the softest with good elasticity, suitable for seals that need to closely fit irregular surfaces, such as special-shaped interfaces of medical devices; 50A and 60A are "all-round players" that balance elasticity and strength, widely used in automobile oil seals and aviation pipeline seals; 70A is the toughest with good wear resistance, suitable for high-pressure contact or frequent friction parts, such as dynamic seals of pumps and valves. When selecting, it is necessary to comprehensively judge according to the equipment pressure and the shape of the contact surface.

The "vulcanization code" in the processing link is the key. It is recommended to use di-2,5 vulcanizing agent with the addition ratio controlled at 0.6-1 part: too low ratio will result in incomplete vulcanization and insufficient product strength; too high ratio will affect the aging resistance. Vulcanization is carried out in two steps: the first stage of vulcanization at 170°C for 15 minutes to make the material initially formed; the second stage of vulcanization at 200°C for 4 hours to completely release the performance and ensure that the high and low temperature resistance and oil resistance meet the standards. During processing, it is necessary to avoid mixing in oil, dust and other impurities, otherwise it will lead to uneven vulcanization, bubbles or cracks.

"Cold flow" characteristics should be paid attention to in storage and transportation. This material is like soft dough, which will slowly deform due to its own weight during long-term storage (cold flow). Therefore, the packaging must be protected during transportation and storage: use 20kg carton packaging to avoid extrusion and puncture leading to damage of the packaging bag; store in a cool and dry place, away from heat sources and direct sunlight, with the temperature not exceeding 30°C; the shelf life is 12 months. Before expiration, key indicators such as hardness and tensile strength need to be sampled and tested, and can be used only if they are qualified.

There are also precautions for post-opening treatment. Unused materials need to be sealed to avoid contact with air leading to surface crusting; before reuse, check for impurities, and filter if necessary; it is recommended to place the materials in room temperature environment for 1-2 hours to balance the temperature and ensure consistent processing fluidity before processing.

Usage tips: Be sure to do a small test before mass production to confirm the vulcanization parameters and product performance; the mold must be clean and smooth to avoid surface defects of the product affecting the seal; if the hardness of the vulcanized product is abnormal, check whether the vulcanization temperature meets the standard or whether the vulcanizing agent is expired; waste materials must be treated as industrial solid waste and not discarded at will.

For more information, please click here Fluorosilicone Compounded Rubber