English
The application of rotary dehumidifier in glass laminating process is crucial, as it ensures the bonding quality and finished product performance of laminated glass (such as car windshield, building safety glass, etc.) by accurately controlling the environmental humidity. The following are its specific application scenarios, technological advantages, and implementation points:
Core application scenarios
1. Environmental control of the laminating workshop
-Adhesive curing: During the bonding process between PVB (polyvinyl butyral) or EVA (ethylene vinyl acetate) film and glass, excessive humidity can cause the film to absorb moisture, affecting the bonding strength and generating bubbles. The rotary dehumidifier controls the workshop humidity below 10% RH to ensure even curing of the adhesive.
-Anti oxidation and pollution: Dry environment reduces moisture and impurities in the air, avoiding glass surface oxidation or adhesive layer pollution.
2. Material storage
-PVB/EVA film moisture-proof: The raw film should be stored in a low humidity environment (usually ≤ 20% RH) to prevent yellowing, brittleness, or decreased viscosity after moisture absorption.
-Glass substrate protection: Avoid microcracks or optical distortions on the glass surface due to moisture absorption.
3. Pre treatment of high-pressure reactor
-Pre pressing stage dehumidification: During the pre pressing process after glass lamination, dry air is introduced to remove residual moisture in the interlayer, reducing the risk of bubbles during high-temperature and high-pressure treatment in the autoclave.
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Technical advantages
-Low temperature deep dehumidification: Traditional cryogenic dehumidification has low efficiency in low-temperature environments, while rotary dehumidifiers can stably achieve ultra-low humidity (up to -40 ℃ dew point) in cold storage or workshops at 0-10 ℃, suitable for glass lamination process requirements.
-High precision control: Supports humidity fluctuation control of ± 1%~3% RH, meeting high-precision manufacturing standards such as ISO 9001 for automotive glass.
-Energy saving and efficient: adopting waste heat recovery technology to reduce energy consumption; Compared to lithium chloride dehumidification, it does not release corrosive substances and is safer and more environmentally friendly.
-Full process adaptation: providing full chain humidity management from raw material storage, laminating workshop to high-pressure reactor pretreatment.
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Typical case
-Automobile windshield production: After a certain car company introduced a rotary dehumidifier, the humidity in the laminating workshop decreased from 50% RH to 8% RH, the product bubble defect rate decreased from 3% to 0.5%, and the PVB film loss decreased by 15%.
-Manufacturing of laminated glass in buildings: In the production of high-rise curtain wall glass, humidity control is used to avoid interlayer optical distortion, improve transparency and safety.
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Key implementation points
1. Equipment selection
-Select the air volume (such as 3000-10000 m ³/h) and dehumidification capacity (such as 10-50 kg/h) based on the workshop area, air exchange rate, and humidity target.
-Prioritize the use of food grade stainless steel or corrosion-resistant materials to avoid metal dust contamination of the glass surface.
2. System integration
-Linked with the air conditioning system to achieve constant temperature and humidity (such as 25 ℃± 2 ℃, 10% RH ± 3%).
-Dry air is directly transported to key workstations such as the laminating operation platform and the inlet of the high-pressure reactor.
3. Maintenance and management
-Regularly replace the silicone or molecular sieve wheel (with a lifespan of about 5-8 years), clean the filter to prevent dust blockage.
-Monitor humidity sensor data to ensure real-time feedback and automatic adjustment.
