SMT Solder Paste Manufacturers.
Focused on SMT soldering processes, a one-stop electronic soldering solutions provider.
Here you can find knowledge about Scrap Tin Recycling, including but not limited to usage methods, installation techniques, troubleshooting and more. Focused on SMT soldering processes. If you can't find what you need, please contact us anytime.
The solder paste scrapping standards cover key indicators during use, such as viscosity changes, contamination status, and opening time. In practice, if obvious deterioration or contamination occurs, it must be discarded immediately to ensure welding quality.
Published: 2026-08-24To address whether solder paste can be reused after extended downtime on SMT production lines, this paper proposes criteria for determining the usability of downtime solder paste based on 20 years of measured production line data. It clarifies the critical points of solder paste activity decay under different temperature and humidity conditions, directly guiding on-site engineers to quickly decide whether the downtime solder paste can continue to be used or must be scrapped.
Published: 2020-04-09The standard for repeated refrigeration, thawing and reuse of solder paste and the scrap judgment are directly related to the yield and cost of SMT production lines. Based on 20 years of measured production line data from JJY, this paper clarifies that under the refrigeration condition of 4±2℃, solder paste is allowed to be reused for no more than 3 times after thawing, the effective service time after each thawing is 24 hours, and the solder paste will be scrapped when it is exposed to room temperature for more than 72 hours in total. It also points out that the solder paste must be stopped immediately when the viscosity rebound exceeds 15%, the metal content drops by more than 0.8%, or the flux stratification is obvious.
Published: 2015-06-26Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.