The Main Cause Of Silicone Seal Failure

Although the current level of science and technology is very high, there are still some defects in the seal protection technology of many products in actual operation, such as waterproof seals for mobile phones, waterproof seals for automotive lamps, and so on. One kind of material) is our most common one. Therefore, as a type of seal used in many aspects, silicone seals often have some unexpected functional problems during normal use, which is difficult to achieve. The actual effect, so today silicone single wire seal supplier will take you to understand what objective factors affect it?

(1) Influence of soft hardness

Many times, the functionality and structure of the product can be completely changed according to the different softness of the silicone product. Therefore, due to the selection of different soft hardness during the use of the silicone seal ring, the phenomenon of stress, stretching, extrusion, etc. appears. There will be some unavoidable problems in the seal ring, such as extrusion gap, excessive force, too high hardness, easy deformation of the product and no rebound.

Silicone Single Wire Seal

(2) Clearance problem

The gap problem can be divided into several factors. One is because of the problem of the rubber material. Many silicone materials have poor rebound force due to the formulation. The problem of insufficient tensile force causes the gap during the use due to the lack of force. Leakage, processing problems of the silicone ring manufacturer, such as a product that is brittle, which causes the product to be thinner, and this kind of problem is prone to this kind of problem. When the product is softened, the rubber material is not familiar with the inner bulge, and it is deformed after being stretched and compressed for a long time A gap problem has occurred.

(3) Stress process

O-shaped silicone rings are generally installed in several places, grooves, planes, and convex grooves. The installation method of each product is different. Its stress process will also affect the service life and function of the product. Therefore, to ensure the sealing performance, They will make a reservation here to distinguish the different methods of using silicone rubber seals and the different degrees of force. For example, how much force can be installed on a flat surface to adjust its tightness. The concave and convex types are affected. The degree of force is the degree of reservation in choosing the size.

4) Compression permanent

Another index for evaluating the performance of O-ring seals is the compression set of the selected material. Under the action of pressure, the O-ring as an elastic element is elastically deformed, and permanent plastic deformation will also occur as the pressure increases. In order to prevent permanent plastic deformation, the maximum allowable compression of the O-ring is about 30% in the static seal and about 20% in the dynamic seal. When the silicone seal is installed in the groove, it is stretched. Or compressed. If the values of tension and compression are too large, the cross section of the O-ring will be excessively increased or decreased, because the cross-section diameter will be reduced by about 0.5% due to 1% stretching. For the hole seal, the O-ring is in a stretched state. The allowable tensile force is 6%. For shaft seals, the O-ring is best compressed along its perimeter, and the allowable perimeter compression is 3%.

If you have more technical questions, welcome to enter our company website for consultation. We are the supplier of connector seals. At present, our main products are silicone single wire seals, connector seals and Other synthetic rubber parts that play a waterproof role in the automotive industry.