The present invention relates to a method for producing a polyvinyl acetal resin film containing a plasticizer absorbed therein, comprising: a contact step of bringing a liquid plasticizer into contact with a polyvinyl acetal resin film; and a heating step of heating the polyvinyl acetal resin film that has been contacted with the liquid plasticizer, wherein an amount of a plasticizer in the polyvinyl acetal resin film before the contact step is 0 to 20% by mass based on a total mass of the polyvinyl acetal resin film.

A polymer film and a laminated glass manufactured using the polymer film are provided. The polymer film has a first surface and a second surface, wherein the first surface has a standard deviation of a void volume (Vv) value at a material ratio of 10% ranging from 0.5 μm.sup.3/μm.sup.2 to 2.5 μm.sup.3/μm.sup.2, and wherein the material ratio and void volume are defined in accordance with ISO 25178-2:2012.

Embodiment relates to film for bonding, and a light-transmitting laminate including the same and the like, a film for bonding comprising an embossed surface, wherein the embossed surface has an A2/A1 value of 1 or less are disclosed. A film for bonding have improved in deairing stability during formation of a light transmitting laminate, an edge sealing characteristic, and the like by controlling characteristics of a embossed surface.

Foam compositions are provided including a polylactic acid polymer; second (e.g., polyvinyl acetate) polymer having a glass transition temperature (T.sub.g) of at least 25° C.; and plasticizer. Also described are articles comprising the foam compositions, such as a sheet or hearing protection article. Methods of making and using the foam compositions are further described herein.

The resin composition of the present invention comprises a polyvinyl acetal resin (A) and an acrylic-based polymer (B), in which the acrylic-based polymer (B) is a polymer of a monomer component comprising an acrylic-based monomer, a dHSP/R of the monomer component relative to the polyvinyl acetal resin (A) is 1.16 or less, and a content of the acrylic-based polymer (B) is 20 parts by mass or more and 90 parts by mass or less based on 100 parts by mass of the polyvinyl acetal resin (A).

A film for glass bonding includes a thiourethane layer comprising a heterocyclo-alkanediyl-based repeat unit indicated by Formula 1, ##STR00001##
and a linear alkanediyl-based repeat unit indicated by Formula 2, ##STR00002##
and a base layer, disposed on a surface of the thiourethane layer, comprising a polyvinyl acetal resin and a plasticizer. In the Formula 1, R1 is —O— or —S—, and X is a heterocyclo-alkanediyl group having carbon atoms of 3 to 10 and sulfur atoms of 1 to 5, and in the Formula 2, R2 is —O— or —S—, and n2 is an integer of 4 to 10.

The present invention aims to provide a flexible resin foam having excellent shapeability and a resin foam sheet, an adhesive tape, a member for a vehicle, and a member for a building each including the resin foam. Provided is a resin foam having a multitude of cells, the resin foam including: a polyvinyl acetal; and a plasticizer, the resin foam having an elongation strain of 300% or more and a 50% compression stress of 70 kPa or less.

There is provided an interlayer film for laminated glass with which the transparency can be enhanced. The interlayer film for laminated glass according to the present invention is in a sea-island state having a sea-like dark part and a plurality of island-like bright parts to be identified when observed with a transmission electron microscope, a thermoplastic resin is contained in the dark part region and a thermoplastic resin is contained in the bright part region, and the arithmetic average value of major diameters of the bright parts is less than or equal to 400 nm or the median value of major diameters of the bright parts is less than or equal to 400 nm.

A film for glass bonding includes a thiourethane layer comprising a heterocyclo-alkanediyl-based repeat unit indicated by Formula 1,

##STR00001##

and a linear alkanediyl-based repeat unit indicated by Formula 2,

##STR00002##

and a base layer, disposed on a surface of the thiourethane layer, comprising a polyvinyl acetal resin and a plasticizer. In the Formula 1, R1 is —O— or —S—, and X is a heterocyclo-alkanediyl group having carbon atoms of 3 to 10 and sulfur atoms of 1 to 5, and in the Formula 2, R2 is —O— or —S—, and n2 is an integer of 4 to 10.

A film for glass lamination includes a metal salt or a metal ion. A first absolute value in a gradient of concentration of metal ions within a depth of 6 to 45 nm from a surface of the film is greater than a second absolute value in the gradient of the concentration of the metal ions within a depth of 86 to 125 nm from the surface. A first average value of the concentration of the metal ions within the depth of 6 to 45 nm is 2.5 times or more than a second average value of the concentration of the metal ions within the depth of 86 to 125 nm.