EVA interlayer packing involves the process of preparing EVA (ethylene vinyl acetate) films for lamination and encapsulation. Here’s a step-by-step guide on how EVA interlayer films are packed for safety laminated glazing:
Preparation of EVA Film: EVA resin, along with other ingredients, is heated and mixed thoroughly. This mixture is then extruded through a flat die of a special design plastic extruding machine to form EVA film 12. Winding the Film: The extruded EVA film is wound up in rolls for storage and packing. The rolls are usually stored in moisture-tight bags to prevent moisture sensitivity, which could affect the film’s properties 3. Packing: The EVA film rolls are packed in containers, ensuring that they are protected from moisture and contaminants. The packing should be done with care to avoid damaging the film 4. Storing: The packed EVA films are stored in a controlled environment to prevent moisture and temperature changes that could affect the film’s quality. The storage room temperature should ideally be below 35°C to avoid roll blocking 3. Shipping: When shipping the packed EVA films, they are usually transported in moisture-tight bags to maintain their integrity during transit. Unpacking: Upon receipt, the EVA films are unpacked and stored in the appropriate environment, ready for lamination or encapsulation processes.
It’s important to note that EVA interlayer films are non-sticky and inert to water moisture, which makes them suitable for handling and glass assembly at room temperature without the need for air conditioning or dehumidifiers 12. They are popular in the glass lamination industry due to their versatility and ability to meet design requirements for both indoor and outdoor applications 12.