What are the functions of the binder and solvent in solder paste flux?

Nowadays in societySolder pasteIt is widely used and an indispensable auxiliary material in many industries. Generally, it is clear that the composition of this product can be divided into two major parts, namely flux and solder powder. Also known as tin powder, it is mainly composed of tin-lead alloy, and the general proportion is63/37; When there are special requirements, a certain amount of tin powder containing metals such as silver and bismuth is also added to the tin-lead alloy. At present, the alloy powders in the solder pastes used in lead-free processes are mainly non-eutectic alloys. The more famous one isSn,Ag,CuAlloy,That is what is said in the market305Solder pasteAgAccount for3%,CuAccount for0.5%Now, JJY solder Paste Manufacturer will explain it to you:

The function of solder paste is to assist in soldering,It can isolate air to prevent oxidation, increase capillary action, enhance wettability and prevent false soldering. It is widely used in fluxes and solder pastes to act as surfactants, High resistance, Strong activity, It has a certain effect on bright spots and full welding. It is the best surface-active additive among all fluxes and is also often used as a medium to high-end environmentally friendly flux in high-precision electronic components, or as an organic synthesis, pharmaceutical intermediate, etc. 

Alloy powder: Completes the mechanical and electrical connection between electronic components and circuit boards, while flux: the carrier of tin powder particles.Providing appropriate rheological properties and wet strength is conducive to heat transfer to the welding area.Reduce the surface tension of the solder.Prevent the re-oxidation of solder and the welding surface during welding.Remove the oxide layer on the welding surface and tin powder particles.Form a protective layer and a safe residue layer on the surface of the welding point.

This is some knowledge about solder paste for everyone. If you are interested, you can take a look. If you are interested in this area, welcome partners to consult Shenzhen JJY Industrial Technology Co., LTD. Let's learn and grow together!