Abstract: The present invention can provide a protective sheet, a protective sheet preventing curl generation in a laminated article formed by using the same and having excellent appearance, and a solar cell module formed by using this protective sheet. A protective sheet includes a weather-resistant film A, an adhesive layer 1, a film B, an adhesive layer 2, a film C in the stated order, the film C having a thickness of 60 ?m or more, in which the width WA of the weather-resistant film, the width WB of the film B, and the width WC of the film C have a relationship of WA>WC>WB.

Abstract: The present invention achieves a solar cell protective material containing a moisture-resistant film with a moisture vapor permeability of less than 0.1 g/m2/day, but not decreasing the moisture resistance for a long term, preventing delamination, and having excellent flexibility and excellent moisture resistance. The present invention provides a solar cell protective material having an effect in preventing the performance degradation of a solar cell and improving the durability of a solar cell. The solar cell protective material includes a fluorine-based resin film; a pressure sensitive adhesive layer; and a moisture-resistant film having a base material and an inorganic layer on at least one side of the base material, the moisture-resistant film having a moisture vapor permeability of less than 0.

Abstract: An excellent surface protective material having moisture proofness that is not deteriorated for a prolonged period of time is provided for a highly moisture proof surface protective material for a solar cell, containing a moisture proof film that comprises a substrate having on one surface thereof an inorganic thin film layer and has a water vapor permeability of less than 0.1 g/m2·day. The surface protective material for a solar cell contains: a moisture proof film that comprises a substrate having on one surface thereof an inorganic thin film layer and has a water vapor permeability of less than 0.1 g/m2·day, a weatherproof film on a side of the inorganic thin film layer of the moisture proof film; and a back surface film that has a melting point of 80° C. or more and 180° C. or less on the opposite side of the moisture proof film from the inorganic thin film layer.

Abstract: A moisture proof laminated film is provided that is excellent in transparency, has considerably high moisture proofness, and is suppressed in generation of bubbles between moisture proof films, even when plural moisture proof films are used. A moisture proof laminated film (1) containing a moisture proof film A (2) having a water vapor transmission rate (WTR (A)) at 40° C. and 90% RH of 1.0 (g/m2·day) or less and a moisture proof film B (3) containing a substrate (4) having on one surface thereof an inorganic layer (5) and having a water vapor transmission rate (WTR (B)) at 40° C. and 90% RH of 10% or less of the water vapor transmission rate (WTR (A)), which are laminated through an adhesive layer (7).

Abstract: The present invention relates to a moisture-proof laminated film having, on the substrate thereof, an inorganic thin film layer and having, on the inorganic thin film layer, a plastic film via a polyurethane adhesive satisfying the following requirement (1), or the following requirements (1) and (2). The moisture-proof laminated film keeps excellent moisture-proofness and interlayer strength even after exposed to high temperature condition. (1) ?0.1?E21?+0.5. (2) ?0.3?E23?+0.3. (In the above formulae, E21 indicates (E2?E1)/E2, and E23 indicates (E2?E3)/E2. E1, E2 and E3 each mean the tensile storage elastic modulus of the adhesive under specific conditions.

Abstract: Provided is a cover film for solar cells, with which solar cell modules are easy to produce, which comprises an encapsulant resin layer excellent in softness, transparency and heat resistance, and a weather-resistant layer excellent in weather resistance, moisture proofness, transparency and heat resistance and having high adhesiveness to the encapsulant resin layer, and is therefore excellent in handleability, and which is effective for reducing the weight of solar cell modules and for enhancing the impact resistance and the durability thereof; and also provided is a solar cell module produced by the use of the cover film for solar cells. Disclosed is production of a cover film for solar cells by laminating weather-resistant layer or a surface protective layer, and an encapsulant resin layer comprising a resin composition that contains an ethylene-a-olefin random copolymer and an ethylene-?-olefin block copolymer both having specific thermal properties.

Abstract: An olefin-based thermoplastic elastomer comprises a propylene-based resin (A) and an olefin-based copolymer rubber (B), and has a ratio (N1/SS) of first normal stress difference (N1) to shear stress (SS) of 0.6:1 to 1.4:1 said first normal stress difference (N1) and shear stress (SS) being determined by subjecting said elastomer to step shear test at a temperature of 200° C. and a shear rate of 25.1 sec−1. Such olefin-based thermoplastic elastomer shows excellent moldability, transferability of embossed patterns and mechanical strength.

Abstract: An olefin-based thermoplastic elastomer comprises a propylene-based resin (A) and an olefin-based copolymer rubber (B), and has a ratio (N1/SS) of first normal stress difference (N1) to shear stress (SS) of 0.6:1 to 1.4:1 said first normal stress difference (N1) and shear stress (SS) being determined by subjecting said elastomer to step shear test at a temperature of 200° C. and a shear rate of 25.1 sec−1. Such olefin-based thermoplastic elastomer shows excellent moldability, transferability of embossed patterns and mechanical strength.

Abstract: Disclosed is a olefin resin composition comprising a propylene resin (PP) and an ethylene resin (PE) at a PP:PE mixing ratio of 97 to 60:3 to 40 by weight, the propylene resin and the ethylene resin having such dynamic melt viscoelasticity that the PE to PP viscosity ratio, i.e., .eta.r=.eta.PE/.eta.PP, is more than or equal to 0.1 and less than 1 at 1 rad/sec and more than or equal to 0.70 at 100 rad/sec and that the difference of modulus of melt elasticity between PP and PE, i.e., .DELTA.G'=GPP-GPE, is 10000 Pa or more; an olefin sheet comprising the olefin resin composition; and an olefin resin laminated sheet having a surface layer and an intermediate layer in which the intermediate layer comprises the olefin resin composition.