Resin film for laminated glass, and laminated glass and preparation thereof
AssigneeSkc Co., Ltd.
InventorsKyu-Hun Kim, Jewon Yeon, Sung Jin Chung, Heung Sik Kim, Hyejin Kim, Hak Soo Lee
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Abstract
A resin film for laminated glass, laminated glass including the resin film, and a process for manufacturing the laminated glass are disclosed. The resin film for laminated glass comprises a resin layer comprising a polyvinyl acetal resin and a contact surface in direct contact with glass, wherein the contact surface has an Rz roughness of 25 to 90 μm and a maximum static friction coefficient at 20° C. of 0.85 to 1.60, and the compressive elastic deformation index measured in the perpendicular direction from the contact surface at 35° C. is 40 to 310 μm/N.
Claims13
A resin film for laminated glass, which comprises:
- a resin layer comprising a polyvinyl acetal resin and a contact surface in direct contact with glass,
- wherein the contact surface has an Rz roughness of 25 to 90 μm, a maximum static friction coefficient at 20° C. of 0.85 to 1.60, a maximum static friction coefficient at 40° C. of 1.05 to 1.80, and a maximum static friction coefficient at 45° C. of 1.20 to 2.10,
- wherein a content of OH group in the polyvinyl acetal resin is 36 to 54% by mole, and
- wherein a compressive elastic deformation index defined by the following Equation 1 and measured in the perpendicular direction from the contact surface at 35° C. is 40 to 310 μm/N:
- Compressive elastic deformation index=d/F Equation 1
- wherein F is a force of 0.05 to 0.6 N applied in the direction perpendicular to the contact surface by a tip having a flat end and a diameter of 4 mm, and d is a depth that is compressively deformed in the perpendicular direction by the tip.
A resin film for laminated glass, which comprises a structure in which a first skin layer, an intermediate resin layer, and a second skin layer are sequentially laminated,
- wherein the first skin layer and the second skin layer each comprise a first contact surface or a second contact surface in direct contact with glass,
- the first skin layer and the second skin layer each comprise a first polyvinyl acetal resin,
- the first contact surface and the second contact surface each have an Rz roughness of 25 to 90 μm, a maximum static friction coefficient at 20° C. of 0.85 to 1.60, a maximum static friction coefficient at 40° C. of 1.05 to 1.80, and a maximum static friction coefficient at 45° C. of 1.20 to 2.10,
- wherein a content of OH group in the first polyvinyl acetal resin is 36 to 54% by mole, and
- wherein a compressive elastic deformation index defined by the following Equation 1 and measured in the perpendicular direction from each of the first contact surface and the second contact surface at 35° C. is 40 to 310 μm/N:
- Compressive elastic deformation index=d/F Equation 1
- wherein F is a force of 0.05 to 0.6 N applied in the direction perpendicular to the contact surface by a tip having a flat end and a diameter of 4 mm, and d is a depth that is compressively deformed in the perpendicular direction by the tip.
Dependencies are inferred from the claim text.