What are the main reasons for failure of silicone seals?
What are the main reasons for the failure of silicone rubber seals ? Is it the silicone sealant?There are many factors that affect airtightness and airtightness. These factors are related, but not all.
For example, the most common form of sealing is the selection of silica gel as the waterproof seal for mobile phones, the waterproof seal ring for automobile lamps, and the material of seals. Therefore, silica gel seal ring is used as a seal in many aspects. What are the main reasons that affect the failure of silica gel seals?Look at the following four points:
(1) the role of hard and soft
Most of the time, according to the different softness of silica gel products, product function and structure can change completely, so in the process of using silicon rubber sealing ring, silicone sealant in stress, tension and extrusion process with different hardness, sealing ring can appear some inevitable problems, such as extrusion clearance, force is too large.High hardness, easy deformation, no rebound and other factors.
(2) gap problem
The gap problem can be divided into several factors, one is due to the compound problem of silicone sealant, many silicone materials due to the formula has very poor resilience.
(3) pressure process
The o-type silicone rubber ring is generally mounted in several places, groove, plane and groove.The stress process of each product also affects the service life and function of the product.
(4) compression persistence
The compression permanent deformation of the selected material is another index to evaluate the performance of O - ring seals.Under pressure, o-ring, as an elastic original, produces elastic deformation and permanent plastic deformation with the increase of pressure.
The main reasons for the impact of silicone seals above 4 points are the most direct or indirect impact on the sealing of silicone seals, and the glue properties of silicone sealant.This article is collected in urine summary if there are mistakes welcome you and small make up to discuss silica gel, glue, silica gel treatment agent, adhesive and other aspects of the problem.
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