What Are the Different Types of Sealant Tool?

Sealing adhesive is referred to as sealant, which is a multi-purpose functional material with both adhesive and sealing properties. It can prevent the leakage of internal gas or liquid, and prevent the intrusion of external dust, moisture, moisture, dirt and chemicals, etc., and can prevent mechanical vibration, impact damage or achieve sound insulation.

The sealant can deform with the shape of the sealing surface, is not easy to flow and has a certain degree of adhesion. It is made of dry or non-drying viscous materials such as asphalt, tar, rubber and resin, and it is made by adding various compounding agents. Sealants can be divided into three categories: elastomer sealants, liquid seal padding and seal putty. Widely used in civil construction, electronic appliances, mechanical equipment and transportation equipment and other parts of the seal. Therefore, the sealant is an indispensable important material for solving running, dripping, leaking, and leaking, and plays an important role in modern technology and national economy.

General-purpose liquid sealing adhesives generally have solvents, including dry adhesion type, dry peelable type, non-drying adhesive type and semi-dry viscoelastic type. This classification method is currently the most commonly used in China and provides convenience for users or producers. But this classification is easily misunderstood. The so-called dryness, non-dryness, and semi-dryness do not refer to the presence or absence of solvent volatilization or the presence of a solvent, but the film-forming properties after coating. Type and semi-dry viscoelastic type.

With the development of China s space industry, in order to ensure the normal operation of the launch vehicle. Higher requirements are also placed on the accuracy and sensitivity of aerospace instrumentation components. Effectively preventing space instruments from running, running, dripping, leaking, preventing the leakage of internal media, and the invasion of external media are the most basic conditions for ensuring the high accuracy, high sensitivity, high reliability and other performance indicators of space instruments. .

According to the different requirements of aerospace instruments, the structural forms can be various. In some parts, due to the use of special materials such as aluminum alloy, stainless steel, engineering plastics and quartz glass, it is not suitable to use welding, riveting, screwing and other connection methods. Structure miniaturization requirements, unsuitable for solid seals, must be sealed with adhesives for component mounting. Because these materials and structural components are most convenient, effective and reliable for the glued installation of components using liquid sealing adhesives. As for the xx gyro meter that I originally developed, there are 18 places where various kinds of sealing adhesives with different properties are used to glue two or more components of different materials together to ensure the tightness requirements of the meter. Therefore, the sealing adhesive has become an indispensable sealing and bonding material in the manufacture of aerospace instruments. At present, in various sizes of products developed and produced by us, such as platform observation window seals, gyroscope instrument head seals, accelerometer oil filling nozzles, insulator seals, air-floating rotor seals, lead plug seals, cable joint seals, oil Surface potentiometer plate seals are all successful examples of the use of sealing adhesives. ^[3]