Case study of connector PIN needle gluing | Low viscosity and high reliability, helping high-performance electronic packaging

In the field of electronic manufacturing, the sealing and sealing of connector PIN pins is a key step in ensuring the long-term stability and performance of products. Recently, we solved the challenge for a customer to simultaneously meet the complex requirements of reflow soldering heat resistance, high adhesion, low viscosity and easy sealing of the potting adhesive in a PA6+GF30% shell+PIN needle tin plated structure.Customer ChallengeSpecial structureThe shell is made of PA6+GF30% reinforced nylon, and the surface of the PIN needle is plated with tin, which requires high adhesion of the adhesive and significant differences in thermal expansion coefficients between different materials.Strict process requirementsIt must undergo reflow soldering process, requiring the adhesive to have excellent high-temperature resistance and not bubble, crack or fail at high temperatures.Sealing process restrictionsThe sealing adhesive needs to have low viscosity (≤ 3000 mPa · s) to ensure smooth flow into the gap between the PIN needle and the housing, forming a complete seal.Insulation and protective performanceIt must have good electrical insulation performance and long-term stability against moisture and dirt.SolutionWe provide our customers with two high reliability organic silicone adhesive systems, which ultimately form the following technical matching:Sealing and sealing of connector PIN pinsOption 1: SIPA 8715 adhesive sealantCore advantages:1: 1 two-component addition molding silicone, with strong adhesion, can be used with PA nylon without the need for a primer PBT、 Good adhesion of common polar materials such as tin plated copperLow viscosity (better than 3000 mPa · s), excellent flowability, able to accurately fill small gapsCan be cured at room temperature or by heating, convenient for flexible process adjustmentNo by-products during solidification, avoiding bubbles and stress concentrationWide working temperature range (-60 ℃~220 ℃), fully capable of reflow soldering thermal shockOption 2: SIPC 9030 RTV sealant Core advantages:Single component neutral curing, room temperature moisture absorption curingGood…