[Chemical Knowledge]：How to bond silica gel

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Silicone is a very common adhesive material, which is widely used in various fields, such as automobiles, furniture, electronics, construction, etc. It has excellent high temperature resistance, low temperature resistance and chemical resistance, and can withstand high pressure and heavy load. Therefore, in many occasions where high-strength connection and sealing are required, silicone is a very important adhesive material. In this article, we will introduce you in detail the method of silicone bonding and its precautions.

1. common silicone bonding methods

1. Using silicone adhesive

Silicone adhesive is a kind of adhesive material with high viscosity and strength, which is often used in electronics, automobiles, machinery and other fields. The silicone adhesive can chemically react within a certain period of time to form a strong adhesive force, so that the two surfaces of the adhesive part are closely combined. When using silicone adhesive, you need to pay attention to the following points:

(1) Cleaning and drying: The bonding part should be cleaned first to remove oil and impurities, and then dried thoroughly.

(2) Application: Apply an appropriate amount of silicone paint to the prepared adhesive, and evenly apply it to the surface of the bonding part with a brush or dropper.

(3) Compression: After the silicone is applied, the two bonding parts need to be tightly pressed together immediately to ensure that they are firmly bonded together. After pressing, the silicone adhesive needs to be fully cured within a predetermined time, generally about 1 hour to 24 hours, so as to ensure the firmness of the adhesion.

2. Silicone sealing strip

Silicone sealing strip is a kind of silicone product specially used for sealing material, which is mainly used for assembling, sealing, gap filling, etc. The bonding method of the silicone sealing strip is usually achieved through the strength of the internal bonding material. The use method is as follows:

(1) Preparation: If the bonding surface needs to be cleaned, please clean it and ensure that the surface is dry.

(2) Cutting: Cut the silicone sealing strip to the required length and paste it on the bonding surface to make it fit accurately.

(3) Compression: firmly stick the sealing strip on the bonding surface and press it tightly to ensure that it is firmly bonded to the surface. When pressing the silicone sealing strip, you can use manual pressure or use tools to compact, such as rollers.
Precautions for
2. silicone bonding

1. Attention to the bonding part

To ensure the bonding effect, the surface of the bonding part should be kept as dry, clean, flat, free of oil and dust as possible. Some materials may have an adverse effect on silica gel, so it should be tested before bonding.