| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain laminated glass excellent in blocking resistance, handleability and degassing performance of a middle layer and not causing optical strain by using a specified laminated resin film as the middle layer. SOLUTION: At least an underside of a laminated resin film composed of at least two resin films (A), (B) including the outermost resin film of 45 to <200μm thickness is finely embossed to 20-40μm surface roughness to form a middle layer. This middle layer is held between transparent glass sheets and they are subjected to preliminary press bonding and concluding press bonding. The resin film A composed of PVAc contg. 5-8mol% vinyl acetate obtd. by modifying PVA to acetal with 4-6C aldehyde and a plasticizer. The resin film B consists of PVAc contg. <=4mol% vinyl acetate obtd. by modifying PVA to acetal with 3 or 4C aldehyde and a plasticizer. The preliminary press bonding is carried out at a temp. below the outflow start temp. of at least one of the resin films.</p> |
