Laminated glass interlayer film and laminated glass

An interlayer film for laminated glass for use in a laminated glass that is a head-up display,

• the interlayer film having a two or more-layer structure,
• the interlayer film comprising:
• a region for display corresponding to a display region of the head-up display;
• one end and the other end being on an opposite side of the one end, the other end having a thickness larger than a thickness of the one end;
• at least one layer having a glass transition temperature of less than 15° C.;
• and
• a region where a value of Y/X is 0.12 or more when the interlayer film has a thickness of X μm and a total thickness of the at least one layer having a glass transition temperature of less than 15° C. is denoted by Y μm,
• the interlayer film having an average thickness of each surface layer in the region for display of less than 300 μm,
• wherein a distance between the one end and the other end of the interlayer film is 0.8 m or more and a maximum thickness of each surface layer is 350 μm or less, and
• wherein the sectional shape in the thickness direction of each surface layer is a wedge shape and a thickness of each surface layer is larger in the other end side of the interlayer film than in the one end side of the interlayer film.

A laminated glass comprising:

• one end and the other end being on an opposite side of the one end, the other end having a thickness larger than a thickness of the one end;
• a first lamination glass member;
• a second lamination glass member;
• and
• an interlayer film for laminated glass, the interlayer film arranged between the first lamination glass member and the second lamination glass member,
• the interlayer film having a two or more-layer structure,
• the interlayer film including at least one layer having a glass transition temperature of less than 15° C.,
• the interlayer film having a region where a value of Y/X is 0.12 or more when the interlayer film has a thickness of X μm and a total thickness of the at least one layer having a glass transition temperature of less than 15° C. is denoted by Y μm,
• the interlayer film having an average thickness of each surface layer in a region, the region from a position of 100 mm to a position of 400 mm from the one end toward the other end, of less than 300 μm,
• wherein a distance between the one end and the other end of the interlayer film is 0.8 m or more and a maximum thickness of each surface layer is 350 μm or less, and
• wherein the sectional shape in the thickness direction of each surface layer is a wedge shape and a thickness of each surface layer is larger in the other end side of the interlayer film than in the one end side of the interlayer film.

A laminated glass that is a head-up display, the laminated glass comprising:

• one end and the other end being on an opposite side of the one end, the other end having a thickness larger than a thickness of the one end;
• a display region of the head-up display;
• a first lamination glass member;
• a second lamination glass member;
• and
• an interlayer film for laminated glass, the interlayer film arranged between the first lamination glass member and the second lamination glass member,
• the interlayer film having a two or more-layer structure,
• the interlayer film including at least one layer having a glass transition temperature of less than 15° C.,
• the interlayer film having a region where a value of Y/X is 0.12 or more when the interlayer film has a thickness of X μm and a total thickness of the at least one layer having a glass transition temperature of less than 15° C. is denoted by Y μm,
• the interlayer film having an average thickness of each surface layer in the display region of less than 300 μm,
• wherein a distance between the one end and the other end of the interlayer film is 0.8 m or more and a maximum thickness of each surface layer is 350 μm or less, and
• wherein the sectional shape in the thickness direction of each surface layer is a wedge shape and a thickness of each surface layer is larger in the other end side of the interlayer film than in the one end side of the interlayer film.