Solution for Vacuum Glass Frame Sealing with Adhesive – SIPA 1820&SIPC 1859 for Durable Sealing and Reliable Protection
1、 Project Background: Sealing Challenge of Vacuum GlassVacuum glass is formed by two parallel glass pieces passing through sealing strips and supporting columns to form a cavity. After vacuum pumping, the cavity can effectively block heat conduction and improve insulation performance.However, due to the significant pressure difference inside and outside the vacuum chamber (up to 1 atmosphere), the sealant not only needs to have high adhesive strength and excellent weather resistance, but also needs to maintain structural stability under high and low temperature cycling, humidity, and mechanical stress. 2、 Glue requirementsAccording to the long-term testing requirements of the customer’s laboratory, the adhesive performance of vacuum glass frame sealing needs to meet the following standards:reliability testDouble 85 test (85 ℃/85% RH) for 1000 hours without shedding or foamingCold and hot shock test: -29 ℃~+60 ℃, 252 cycles, low temperature for half an hour, high temperature for half an hourmechanical propertiesPeel strength>15 MPa (not mandatory, but requires good adhesive strength and flexibility)sealing performanceWaterproof level needs to reach IPX8Long term vacuum sealing stability, no air leakage, no delamination, no crackingThese conditions mean that ordinary structural adhesives or glass adhesives can no longer meet the demand, and a high-performance silicone adhesive sealing system must be used, while also considering structural adhesion, sealing protection, and thermal stress absorption.3、 Recommended solutions✅ Option 1: SIPA 1820 additive silicone adhesive (heat cured type)Elaplus SIPA 1820 is a single component addition molding silicone adhesive based on a special silicone rubber system, which is cured by heating to form a flexible and weather resistant elastomer.Performance characteristics:High reliability: Passed rigorous tests such as dual 85, thermal shock, salt spray, and wet heat agingExcellent weather resistance: no yellowing or cracking after long-term exposure to ultraviolet rays, moisture, and temperature changesExcellent sealing performance: After curing, it forms a continuous elastic structure, effectively preventing…
