A high frequency semi-isotropic embossed polymer interlayer sheet is disclosed. The embossed polymer interlayer sheet has a first side; a second side opposing the first side; and an embossed surface on at least one of the sides, and a surface texture ratio, Str, (as measured per ISO 25178) of between 0.1 and 0.99. The embossed polymer sheet may have at least 50 roughness peaks per centimeter (R PC, as measured per ASME B46.1 (1985)). The embossed polymer sheet may have a mottle value of less than or equal to 2.5 (as measured by a Clear Mottle Analyzer (CMA)). The embossed polymer sheet may be polyvinyl butyral.

Provided is an interlayer film for laminated glass capable of suppressing color migration and enhancing the handling property of the interlayer film. An interlayer film for laminated glass according to the present invention contains a thermoplastic resin, a first plasticizer having a solubility parameter of less than 18.0 (J/cm.sup.3).sup.0.5, and a second plasticizer having a solubility parameter of 18.0 (J/cm.sup.3).sup.0.5 or more.

Multiple layer interlayers having enhanced optical and acoustic properties are provided, along with methods of making and using the same. Interlayers as described herein may include at least two outer skin layers and an inner core layer, with one of the outer skin layers having a different thickness than the other at one or more locations along the interlayer. The multi-layer interlayer may also exhibit acoustic properties and, in some cases, may have an overall wedged thickness profile. Additionally, in some aspects, interlayers and laminates formed therefrom may also provide reduced infrared energy transmission, without sacrificing acoustic and/or optical performance.

A high frequency semi-isotropic embossed polymer interlayer sheet is disclosed. The embossed polymer interlayer sheet has a first side; a second side opposing the first side; and an embossed surface on at least one of the sides, and a surface texture ratio, Str, (as measured per ISO 25178) of between 0.1 and 0.99. The embossed polymer sheet may have at least 50 roughness peaks per centimeter (R PC, as measured per ASME B46.1 [1985]). The embossed polymer sheet may have a mottle value of less than or equal to 2.5 (as measured by a Clear Mottle Analyzer [CMA]). The embossed polymer sheet may be polyvinyl butyral.