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The second sulphurization of silicone hoses is an essential part, it can make silicone tube products on top of this can continue to improve some, not only the silicone tube can be secondary sulphurization like silicone extrusion other processes can also be carried out this operation, such as silicone strip, silicone foam tube can, but like LED casing products are not recommended for secondary sulphurization will affect some light effect.

Silicone extrusion is divided into two stages

sulfurization before sulfurization refers to the baking channel (molding), after sulfurization refers to the oven (perfect), because the former baking channel after sulfurization will inevitably have some parts of the vulcanization is incomplete or the vulcanization process is affected by the cross-linking of silicone tube products is some fine particles, in this case, the customer is not acceptable products, so the need for secondary sulfurization.

Silicone hoses
Silicone hoses

In addition, in the secondary sulfurization process can make silicone tube further vulcanization to form high-quality silicone tube.

For example, the regular industrial grade silicone tube because the product is not particularly strict, so many manufacturers will omit the secondary sulfurization step directly shipped, and like some of the more stringent product requirements of customers are often required to carry out the secondary sulfurization of this step, such as food-grade silicone tubemedical-grade silicone tube, pharmaceutical-grade silicone tube this kind of products they back body product application environment is harsher safety level is also higher, so in the use of food-grade raw materials produced after the need for secondary sulfur to protect the safety and stability of silicone tube.

Another is the odor, the majority of the current silicone extrusion process using double two four and platinum vulcanization of these two processes, and double two four silicone tube production will have a pungent odor if the secondary sulfur will eliminate most of the odor (or can be smelled) and the platinum process of silicone tube odor is very small and then the secondary sulfur can be reached after the odorless.

straight-silicone-hose
straight-silicone-hose

The second addition of sulfur to silicone tube crosslink density will further enhance the consequences directly lead to silicone tube tensile strength, resilience, melting degree, thermal stability are better than the silicone tube without the second addition of sulfur a cut, if the silicone tube is not the second addition of sulfur then some characteristics will decline. So in general, it is recommended that silicone products are best to carry out the second sulphurization will make the full potential of silicone tube development, but also to make up for some of the later deficiencies.

OrientFlex With 16 years of production management experience, We insist on providing our customers with high quality silicone hoses.