Solder pasteFrequently Asked questions about storage environments? The storage environment for solder paste is in the refrigerator, and the temperature is generally at2~10℃The shelf life of the solder paste is about six months (unopened). Do not place in direct sunlight. If solder paste is not stored properly, phenomena such as solder beads, false soldering, short circuit, collapse and stele erection may occur. Therefore, it is essential to strictly follow the storage conditions and correct usage methods of solder paste. Now, JJY solder Paste Manufacturer will explain to everyone. Many people will raise some questions, and we can also answer them for you:

1What effects will occur if the temperature of the solder paste storage environment is too low?
 Answer: The storage temperature is low, and the flux composition contains approximately weight1%-2%The adhesive (resin) is mainly used to prevent solder paste from dripping and to prevent the surface of the solder from oxidizing again when the temperature is lower than2℃At this time, the resin will undergo crystallization, destroying the original molecular structure. When it is reheated to the normal temperature, the performance of the solder paste will inevitably be damaged.

2What effects does the storage environment of solder paste, if the temperature is too high or too low, have on the viscosity of the solder paste and the activator?
 Answer: Excessively high temperatures will reduce the viscosity of solder paste. The main active ingredient of the active agent is rosin, and rosin in260Tin will decompose at around degrees Celsius, so the temperature of the tin bath should not be too high

3How can we ensure that the solder paste has a good storage environment?
 Answer: When solder paste is not in use, it should be put back in the refrigerator in time. The solder paste from the opening should be kept as much as possible24Use it up within hours. When put back in the refrigerator, do not store it together with unopened solder paste. When used again, it still needs to be warmed up.

4How to solve the problem of false soldering when using solder paste?
 Answer: Check whether the temperature and humidity of the solder paste storage environment meet the standards, and whether the tin brushing process complies with the standards. If none of them meet the standards, you can contact the engineer of your unit to solve the problem.

5When using solder paste, what should be done if there is too much?

 Answer: The main reason for the excessive quantity is that the size of the template was not adjusted during use, resulting in an overly large size. Steel plates andPCBWhen the distance between them is too large, it leads to a bridge connection. Solution: Before starting work, first check the window size. If it is too large, make appropriate adjustments. "ProceedPCBParameter setting of the distance from the steel plate Clean the template thoroughly.

6What should I do if there is a graphic misalignment when using solder paste?

The cause of this is that the steel plate corresponding to the printing was not placed in the predetermined position. During the operation contact, there was a deviation in the connection between the solder paste and the steel plate. Such a deviation will lead to the misalignment of the graphics.

Solution: Before the operation, adjust the steel plate first and then conduct a test to see if there is still any misalignment in the graphics.

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