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Recently, a netizen have raised a question on silicone social forums, ‘Why does my silicone wristband deform and become soft? Can the deformation of silicone bracelet be controlled?’ This question has also puzzled many friends, some silicone products, where after stretching, there is no rebound but instead a frosted pattern appears. So what is the truth behind this?
Silicone used & vulcanizing agents
The type of silicone used & vulcanizing agents can affect deformation. Silicone rubbers with higher cross-linking density also tend to deform less. Addition of fillers can make the silicone stiffer and more resistant to deformation. Sometimes, due to the formula modulation errors and different blending methods of silicone raw materials, the tensile resilience of silicone products is not enough, which leads to the large deviation of raw material formula, and the product does not rebound.
Curing conditions
Proper control of curing time, temperature and pressure can help minimize deformation. Over or under-curing the silicone can lead to excess deformation. Sometime when the processing needs to catch up with the output, some supplier vulcanized the silicone bracelet too urgently which make the curing time not enough, the product will become more likely deformation.
Additives
Adding certain reinforcing agents and fillers, such as silica, carbon black or calcium carbonate can improve the strength and hardness of silicone and reduce deformation.
Besides, molds’ quality, pressure during the molding process, whether vulcanizing agents are uniform when mixing with silicone, whether the proportion is symmetrical and other factors are also involve the tensile resilience of products.To get more info, please feel free to consult with us.