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Application scenarios and process specifications of hot melt butyl adhesive
Release time:
2025-07-17
Hollow glass sealing: As the first sealant, it forms a dual sealing system with polysulfide or silicone adhesive, which can reduce the overall window heat transfer coefficient (U value) by 0.3-0.5W/(m ² · K) in passive buildings.
Typical applications:
Hollow glass sealing: As the first sealant, it forms a dual sealing system with polysulfide or silicone adhesive, which can reduce the overall window heat transfer coefficient (U value) by 0.3-0.5W/(m ² · K) in passive buildings.
Automotive industry: used for windshield bonding, with a tested vibration fatigue life of 10 cycles (ISO 10415:2014 standard), far exceeding the industry requirement of 10 cycles.
Photovoltaic modules: In double glass module packaging, the water vapor permeability is ≤ 0.05g/(m ² · 24h), ensuring a 25 year power attenuation rate of<8%.
Key points of construction:
Temperature control: The extrusion temperature should be strictly controlled at 130-140 ℃. If the temperature is too high (>160 ℃), it will cause colloid decomposition and produce bubble defects. A certain engineering case shows that when the temperature exceeds 15 ℃, the sealing failure rate skyrockets from 2% to 18%.
Glue application amount: The glue application amount per unit length should be controlled between 0.8-1.2g/m. Excessive glue application can cause the glue layer to creep. According to statistics from a testing agency, projects with glue application exceeding the standard by 30% have a 25% increase in gas leakage probability after three years.
Compatibility: The contact surface with the aluminum spacer strip needs to undergo plasma treatment, and the surface energy must be ≥ 45mN/m, otherwise the bonding strength will decrease by 40%.
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