Intermediate film for laminated glass and laminated glass

An interlayer film for a laminated glass, comprising:

• an interlayer film,
• wherein said interlayer film for a laminated glass comprises a film part A containing a resin composition A or a resin A, and a film part B containing a resin composition B or a resin B, and two covering layer Ds containing the same resin composition B or the same resin B,
• wherein the resin composition A contains polyvinyl acetal resin and/or the resin A is polyvinyl acetal resin,
• wherein the resin composition B contains polyvinyl acetal resin and/or the resin B is polyvinyl acetal resin,
• wherein the film part A has an upper planar surface, a lower planar surface, and a plurality of side surfaces defining a first portion of the interlayer film, the film part B has an upper planar surface, a lower planar surface, and a plurality of side surfaces defining a second portion of the interlayer film, and the two covering layer Ds have an upper planar surface, a lower planar surface, and a plurality of side surfaces defining a third and fourth portion of the interlayer film,
• wherein the resin composition A or the resin A has a temperature Ta at which the resin composition A or the resin A shows a maximum loss tangent of a dynamic viscoelasticity at a frequency of 1 Hz,
• wherein the resin composition B or the resin B has a temperature Tb at which the resin composition B or the resin B shows a maximum loss tangent of a dynamic viscoelasticity at a frequency of 1 Hz,
• wherein the temperature Tb is larger than the temperature Ta by 10° C. or more,
• wherein the film part A and the film part B are horizontally arranged, such that the upper planar surface of the film part A and the upper planar surface of the film part B are horizontally arranged in a same horizontal plane, and the lower planar surface of the film part A and the lower planar surface of the film part B are horizontally arranged in a same horizontal plane, and
• wherein the film part A and the film part B are sandwiched between the two covering layer Ds such that one of the third or fourth portions is above the film part A and film part B and the other of the third or fourth portions is below the film part A and film part B.