Elaplus Case Study/Application of adhesive to pressure sensor
In modern industrial manufacturing, pressure sensors are widely used as key detection components in fields such as automotive, aerospace, medical equipment, and industrial automation. However, these high-precision devices have extremely demanding requirements for material selection and processes, especially in the application of adhesives.We will discuss two adhesives that are particularly suitable for the production of pressure sensors – SIGEL 1806 for gel encapsulation and EP 1738 for shell bonding, and show how they can help enterprises improve product quality and production efficiency through specific cases.Demand for gel pottingThe internal circuit board of the pressure sensor requires a sealing material that can provide protection to prevent damage to sensitive components from external environments such as humidity, dust, vibration, etc. At the same time, the sealing material must have low stress characteristics to avoid damaging precision components due to mismatched thermal expansion coefficients.The difficulty of shell bondingThe housing of a pressure sensor is composed of two materials: metal and plastic. Traditional adhesives are difficult to achieve strong bonding and require stability under extreme conditions of high and low temperatures. In addition, the customer wishes to simplify the production process and reduce the curing time.Customized solution: Double material combination solves technical problems After on-site testing by our technical team, a targeted combination solution of “sealing+structural bonding” has been proposed:▶ Core protective layer: SIGEL1806 gel potting adhesiveInnovative low modulus formula (penetration degree 70) effectively absorbs mechanical stressMaintain elasticity over a wide temperature range of -60 ℃ to 200 ℃3D stereoscopic coating technology achieves “zero damage” protection for sensitive componentsThixotropic index>4.5, no sagging during vertical surface construction, and the sealing qualification rate has been increased to 99.2%▶ High strength adhesive layer: EP 1738 epoxy adhesiveSingle component thermosetting design (120 ℃/60min), increasing production line efficiency by 40%Shear strength>18MPa, according to MIL-STD-810G vibration standard Chemical resistant properties:…
