Intermediate film for laminated glass, rolled body, and laminated glass

An interlayer film for laminated glass having a two or more-layer structure,

• the interlayer film comprising a first layer and a second layer,
• the second layer being layered on a first surface of the first layer,
• the first layer containing a vinyl monomer polymer,
• the first layer containing (1) a polyvinyl acetate, which is a polymer of a polymerizable composition containing vinyl acetate and a monomer having a functional group having hydrogen bondability, as the vinyl monomer polymer, the functional group in the monomer having a functional group having hydrogen bondability being a hydroxyl group;
• or (2) a (meth)acrylic polymer, which is a polymer of a polymerizable composition containing a (meth)acrylic monomer lacking a functional group having hydrogen bondability on the side chain and a monomer having a functional group having hydrogen bondability, as the vinyl monomer polymer,
• a thickness of the interlayer film being 0.1 mm or more,
• a laminated glass obtained through first, second and third steps having a haze, measured in conformity with JIS K6714 by using a haze meter, of 0.5% or less,
• the first step being a step in which an interlayer film having a length of 30 mm and a width of 2.5 cm is prepared, two sheets of clear float glass in conformity with JIS R3202 having a thickness of 2.0 mm, a length of 30 mm and a width of 2.5 cm are prepared, and the interlayer film is sandwiched between the two sheets of clear float glass to give a laminate,
• the second step being a step in which the obtained laminate is put into a rubber bag and the inside thereof is degassed for 20 minutes at a degree of vacuum of 2.6 kPa, after which the laminate is transferred into an oven while being degassed, and furthermore, held in place at 90° C. for 30 minutes and pressed under vacuum to subject the laminate to preliminary press-bonding,
• the third step being a step in which the preliminarily press-bonded laminate is subjected to press-bonding for 20 minutes under conditions of 135° C. and a pressure of 1.2 MPa in an autoclave to obtain a laminated glass.