A plasticizer-containing film of polyvinyl acetal having a softening temperature Tg of less than 74 C. contains at least one cyclohexane dicarboxylic acid ester as a plasticizer. The plasticizer-containing films have a low tendency for sweating of the plasticizer, and are useful in producing laminate safety glasses and photovoltaic modules.

An aluminum frame structure for packaging solar panel, comprising: a vertical support member; an U-shaped member, coupled to the vertical support member while allowing the opening of the U-shaped member to face toward a level direction; and at least one protruding member, disposed inside the U-shaped member, each having at least one protrusion arranged at the opening of the U-shaped member and at a position neighboring to the vertical support member while allowing the gap between the highest point of the at least one protrusion and an imaginary line representing the contact slope to be formed larger than the thickness of the back film, and also enabling the contact area of the at least one protrusion and the contact slope to be at least larger than 50% of the area of the contact slope.

Provided are a laminate for solar cells, which facilitates production of solar cell modules, which does not require a crosslinking step and which is excellent in transparency, moisture-proofness, sealability and handleability (rigidity), and a solar cell module produced by the use of the laminate. The laminate for solar cells has a resin layer (I)-1 or a resin layer (I)-2 as at least one outermost layer thereof, and has a resin layer (II) that contains an etylene-based polymer (C) satisfying a specific requirement and a nucleating agent (D). The resin layer (I)-1 is a resin layer containing an ethylene/-olefin random copolymer (A) satisfying a specific requirement, and an ethylene/-olefin block copolymer (B) satisfying a specific requirement. The resin layer (I)-2 is a resin layer containing a silane-modified etylene-based resin (X).

The current invention relates to a solar-cell module backing monolayer obtained by melt-extruding a polymer composition comprising (a) a polyamide, (b) an elastomer and (c) an elastomer that contains groups that bond chemically and/or interact physically with the polyamide, and wherein the elastomer constitutes the continuous phase of the polymer composition and the polyamide constitutes the dispersed phase of the polymer composition, characterized in that the polymer composition comprises from 10 to 50 wt. % of the polyamide (a) and from 50 to 90 wt. % of the elastomer (b) and (c) (of the total weight of polyamide (a) and elastomer (b) and (c) present in the polymer composition).

Provided is a wavelength conversion material composed of resin particles comprising an acrylic resin and an organic rare earth complex contained in the acrylic resin, in which the acrylic resin is obtained from an acrylic resin composition comprising a cross-linking agent, and deterioration of the organic rare earth complex is prevented. A wavelength conversion material composed of resin particles comprising an acrylic resin and an organic rare earth complex contained in the acrylic resin, wherein the acrylic resin is a polymer which is a reaction product of an acrylic resin composition comprising a (meth)acrylate monomer, a crosslinking agent and an azo polymerization initiator, wherein the crosslinking agent is a compound represented by the following formula (I):

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where R.sup.1 and R.sup.2 each independently represent a hydrogen atom or a methyl group and n represents an integer of 2 to 14, and the content of the cross-linking agent is: 0.1 to 5 parts by mass based on 100 parts by mass of the (meth)acrylate monomer when n in formula (I) is 2; or 0.1 to 50 parts by mass based on 100 parts by mass of the (meth)acrylate monomer when n in formula (I) is 3 to 14.

Provided are a solar cell rear surface protective sheet comprising: a base material film including a white polyester film and having a thickness of from 20 m to 500 m, a first resin layer having a modulus of tensile elasticity of 1.2 GPa or higher and 3.0 GPa or lower and a thickness of 1 m or greater, and a second resin layer having a lower modulus of tensile elasticity than the first resin layer, which are laminated in this order.

A solar cell supporting layer stack for mechanically supporting a solar cell is described. The solar cell includes: a rigid foam layer; one or more skin layers disposed adjacent to said rigid foam layer; and wherein said rigid foam layer and said one or more skin layers capable of providing mechanical support to said solar cell when said supporting layer stack is disposed adjacent to said solar cell.

An encapsulant of a photovoltaic module, intended for coating a photovoltaic cell, having a composition which does not include any cross-linking agent and including: an ethylenealkyl acrylate copolymer, the copolymer making up 70% to 96% of the weight of the composition; a silane, making up 0.1% to 2% of the weight of the composition; wherein the composition also includes a terpolymer of ethyleneacrylic estermaleic anhydride or glycidyl methacrylate, the terpolymer making up 2% to 29.9% of the weight of the composition. Also relates to the use of such an encapsulant in a photovoltaic module as well as to a photovoltaic module including such an encapsulant.

Provided is a wavelength conversion material composed of resin particles comprising an acrylic resin and an organic rare earth complex contained in the acrylic resin, in which deterioration of the organic rare earth complex is prevented. A wavelength conversion material composed of resin particles comprising an acrylic resin and an organic rare earth complex contained in the acrylic resin, wherein the acrylic resin is a polymer which is a reaction product of an acrylic resin composition comprising a (meth)acrylate monomer, a crosslinking agent and an azo polymerization initiator, wherein the acrylic resin composition is substantially free of an organic peroxide having a group represented by RC(O)O where R represents a hydrocarbon group that may be optionally substituted, as a polymerization initiator, and the acrylic resin composition comprises an organic peroxide having a one-minute half-life temperature of 145 C. or less as another polymerization initiator.

Provided is a solar cell module comprising a back sheet including a reflective film including a deposited reflective layer including metal and having 2 or higher optical density (OD), and an UV blocking layer positioned below the reflective film and having 5% or lower transmittance of light at 380 nm wavelength.