What is the difference between solder powder and flux in solder paste?

Solder pasteAsSMTAn indispensable part of the production process, the particle size of solder powder in solder paste, the proportion of metal content, the content of flux, the stirring time, the tempering time, as well as the placement and storage time of solder paste, all affect the final printing quality of solder paste.

At room temperature, solder paste also has a certain viscosity so that electronic components can be pasted in the required positions. Under the condition of a constant welding temperature, a better connection effect can be achieved with the action of solvents and other auxiliary additives. Solder paste is usually composed of two parts: solder powder and flux. Different components play their own unique roles.

Fluxes mainly include activators, resins, thixotropic agents and solvents, etc. The activator in solder paste can effectively remove the oxides of soldered parts and also effectively reduce the surface tension of tin alloys. The solvent allows for better stirring. Adjust the uniformity of the solder paste.

Solder powder is usually composed of tin-lead, tin-lead-silver, tin-silver-copper, tin-bismuth-silver, tin-bismuth alloy, etc. Different proportions are used to achieve better soldering effects. According to different requirements for melting points, solders can also be classified into high-temperature solders, medium-temperature solders and low-temperature solders, etc.

After understanding the functions and components of solder paste, it is necessary to store it better. Under normal circumstances, solder paste needs to be controlled at1-10Celsius. If unopened, it can be used6It is not suitable to be placed in a place exposed to direct sunlight for a month.

JJY Solder Paste Factory produces a wide range of solder paste products, including lead-free solder paste, halogen-free solder paste, silver-containing lead solder paste, syringe solder paste, nickel-plated environmentally friendly solder wire, solder bar, etc. We can provide technical support. If you have any needs or technical questions regarding soldering, please feel free to leave a message online to interact with us!