High temperature vulcanized silicone rubber sealing strip may not be familiar with, the following is a systematic introduction to help you have a comprehensive and profound understanding of high temperature vulcanized silicone rubber sealing strip.

EPDM rubber (EPDM) sealing strip is known to all, and silicone rubber sealing strip belongs to the rubber family, is also very similar to the field of application, layman may be difficult to distinguish, but there are great differences in essence, the specific situation has the following points:

Different colors:

EPDM seals are mostly black, occasionally gray, very monotonous. High temperature vulcanized silicone rubber by adding masterbatch pigments, red, orange, yellow, green, blue and purple, very rich, you want what color, you can change what color.

Different heat and cold resistance:

EPDM temperature limit range -40℃-150℃, high temperature vulcanized silicone rubber bottom line temperature -60℃-250℃, after the introduction of phenyl temperature range is larger.

Weatherability is different:

Because of its different composition, the silicon oxygen bond of high temperature vulcanized silicone rubber sealing strip has more advantages in weather resistance than the carbon carbon bond of EPDM.

Different ability to withstand pressure:

The silicone rubber sealing strip has good elasticity, and the deformation caused by greater pressure can be restored. EPDM is not comparable in terms of flexion and extension.

Biocompatibility is different:

Silicone rubber has a stronger affinity and more friendly relationship with human beings, so it can be applied in a wider range of fields, such as medical equipment and food, which EPDM can never achieve.

High temperature vulcanized silicone rubber seal is how to obtain the above cool skills.

High temperature vulcanized silicone rubber predecessor is 110 raw rubber, which is the skeleton of high temperature vulcanized silicone rubber, most of the skills benefit from it. It has a molecular weight between 400,000 and 600,000, with a lot of methyl groups and a few vinyl groups in the middle.

The skeleton is still a little weak, but it needs flesh and blood, and charcoal black is flesh and blood, to make the body strong. How to fill the skeleton with flesh and blood requires kneading machine. Through the mechanical action of kneading agent, 110 raw rubber and silica are organically fused together. This process is extremely painful and significant, because after kneading and moulding, the mechanical strength of silicone rubber is increased dozens of times. In the kneading process, some additives will be intentionally added to achieve some specific effects, such as adding hydroxyl silicone oil to prevent aging joints and muscles from adhesion and ossification - preventing structuring in the storage process.

Now the bones and muscles have, but this is far from enough, but also need to get through the body of seven meridians and six veins, only through the meridians association dredge, in order to play the greatest skill, which requires the next vulcanization operation. First of all, the vulcanizing agent is added to the mixing glue on the double roller machine after mixing evenly, and then to the screw extruder, extrusion molding, after special high temperature, high temperature section of the drying process, crosslinking molding, sometimes in order to ensure that the vulcanization completely also need two curing treatment.