What is Double-Laminated Glass? Detailed Explanation of Processing Technology and Applications
Double-laminated glass, also known as laminated glass, is a composite glass product made of two or more sheets of glass with one or more layers of organic polymer interlayer sandwiched between them. After a special high-temperature pre-pressing and high-temperature, high-pressure process, the glass and interlayer are bonded together.
Common interlayers include PVB (polyvinyl butyral), SGP (ionic interlayer), EVA (ethylene-vinyl acetate copolymer), and PU (polyurethane). These interlayers are transparent, elastic, have strong adhesion, and good penetration resistance.
Even if the glass breaks, the fragments will adhere to the film, and the broken glass surface remains clean and smooth, effectively preventing injuries from shards and falling debris.
Production Methods:
1) Film Hot-Pressure Method (Dry Method): The glass and interlayer are stacked in sequence and placed in an autoclave. They are then hot-pressed under specific temperature and pressure conditions to firmly bond the interlayer to the glass. This method produces laminated glass with stable quality and reliable performance, and is currently the mainstream production method.
2) Grouting method (wet method): The prepared liquid adhesive is poured into the gap between two pieces of glass, and then cured to solidify the adhesive to form an intermediate film, which bonds the glass together.


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