inSMTIn the production industry,Solder pasteIt is a kind of welding material. It is a paste solder made by uniformly mixing alloy powder, paste flux and other carriers. However, in the actual operation process, many engineers and technicians have encountered the problem that solder paste is prone to drying out. Next, Shenzhen JJY Solder Paste Manufacturer will discuss with you the reasons for solder paste drying out and the solutions:

I. Reasons for Solder Paste Drying Out

1Low environmental humidity: The solvents in solder paste (such as alcohol) are prone to evaporation, especially in a dry environment. When the environmental humidity is below a certain level, the evaporation rate of the solvent will increase, causing the solder paste to dry out rapidly.

2Improper storage conditions: Solder paste should be stored in a cool, dry and temperature-appropriate environment. If the storage environment temperature is too high or too low, or it is exposed to direct sunlight, it will accelerate the drying process of the solder paste.

3After opening, if not used for a long time: Once the solder paste is opened, its surface will be exposed to the air, and the solvent will evaporate rapidly. If the solder paste is not used for a long time, a dry film will form on its surface, affecting its subsequent usage effect.

4Improper use: During the printing or dispensing process, if the operation is not proper, such as too fast printing speed or excessive pressure, it will cause the solvent in the solder paste to evaporate too quickly, thereby causing the solder paste to dry out.

Ii. Countermeasures for Solving the Problem of Dry Solder Paste

1Control environmental humidity: Maintain the humidity of the working environment within an appropriate range (it is usually recommended to.45%-65%RHIt can effectively slow down the evaporation rate of the solvent in the solder paste.

2Proper storage: Ensure that the solder paste is stored in a cool, dry and temperature-appropriate environment, avoiding direct sunlight and high temperatures. Meanwhile, check the status of the solder paste regularly. Once any abnormality is found, it should be replaced in time.

3Reasonable development and use: After opening the solder paste, it should be used as soon as possible. If it cannot be used up in a short time, it is recommended to seal and store the solder paste. And stir thoroughly before use to ensure its uniformity.

4Optimize the operation process: During the printing or dispensing process, the speed and pressure should be well controlled to avoid being too fast or too large. In addition, regularly clean the printing templates and equipment to reduce the impact of impurities on the solder paste.

In addition, external factors such as the application scenarios of solder paste, humidity, and working temperature can also affect the hardening and insolubility of solder paste during use. Therefore, we should pay attention to these external factors. It is hoped that this article can provide useful references and assistance for relevant technical personnel.

As a 16-year-old veteran solder paste manufacturer, JJY has always been committed to the research and development and production of solder paste. Our solder paste is of stable quality, without solder disconnection, false soldering or monument erection. No residue, Wuxi beads, bright, full, firm solder joints with excellent electrical conductivity. If you have any needs, please feel free to contact us.