The production process of EVA laminated glass is similar to that of ordinary laminated glass, but there are differences in film selection and some processes.
The production process of EVA laminated glass is similar to that of ordinary laminated glass, but there are differences in film selection and some processes. The main process is as follows:
Original glass preparation
-Film selection: Select high-quality glass raw materials with high flatness and no obvious defects, and determine the type of glass according to actual needs, such as float glass, ultra white glass, etc.
-Cutting: Use a glass cutting machine to cut the original glass into the required size and shape, with cutting accuracy controlled within a small range to ensure the accuracy of subsequent processing.
Glass cleaning and drying
-Cleaning: Place the cut glass into a glass cleaning machine and use methods such as spraying and brushing to remove dust, oil, and other impurities from the glass surface using clean water and specialized cleaning agents, ensuring the cleanliness of the glass surface.
-Drying: After cleaning, the glass is dried by hot air or natural drying to completely dry the surface of the glass and avoid moisture residue affecting the bonding between the EVA film and the glass.
EVA film preparation
-Film selection: Based on the usage requirements and performance characteristics of laminated glass, select EVA (ethylene vinyl acetate copolymer) film with appropriate thickness and performance. EVA film should have good transparency, adhesion, and weather resistance.
-Film cutting: Use cutting equipment to cut EVA film into a shape that matches the size of the glass. When cutting, pay attention to ensuring that the edges of the film are neat, without burrs or damage.
Lamination
-On a clean workbench, place a piece of glass first, lay the cut EVA film flat on the glass, ensure that the film is aligned with the edge of the glass, and then cover another piece of glass on the EVA film to form a sandwich structure. During the lamination process, it is important to avoid the formation of bubbles and wrinkles between the film and glass as much as possible.
High temperature curing
-Place the sealed laminated glass into the laminated glass equipment and crosslink the EVA film at a high temperature to achieve complete curing, thereby firmly bonding the two pieces of glass. The curing temperature is generally around 130-150 ℃, and the curing time depends on the thickness of the glass and film, usually ranging from tens of minutes to several hours.
Cooling and testing
-Cooling: The cured laminated glass is taken out of the curing equipment and naturally cooled to room temperature. During the cooling process, it is necessary to avoid external impact or rapid temperature changes on the glass to avoid affecting product quality.
-Testing: Conduct a comprehensive inspection of the cooled EVA laminated glass, including visual inspection, to check for defects such as bubbles, impurities, and delamination; Measure the dimensions to ensure that the glass meets the standard requirements; Performance testing to check whether the indicators such as light transmittance, impact resistance, and bonding strength meet the specified standards.
Packaging and Storage
-Packaging: Qualified EVA laminated glass is packaged with protective film, cardboard boxes, or wooden crates to protect the glass from damage during transportation and storage.
-Storage: Store the packaged laminated glass in the warehouse, classify it according to specifications and batches, take measures to prevent moisture and dust, and wait for shipment.
