Provided is a method for producing a polyethylene-based resin extruded foam sheet by extruding and foaming a foamable molten resin composition formed by kneading a mixture containing a low-density polyethylene, a physical blowing agent, and an antistatic agent, wherein the foam sheet has a thickness in a range of from 0.05 to 0.5 mm, and the antistatic agent is a polymeric antistatic agent having a melting point whose different from the melting point of the low-density polyethylene is in a range of from 10 to +10 C., and having a melt flow rate of 10 g/10 min or more. This method enables a novel polyethylene-based resin extruded foam sheet to be obtained that is of high quality such that formation of a small hole or a through-hole has been reduced or eliminated, and has both excellent strength and a shock-absorbing property despite a very small thickness even in medium- or long-term continuous production, and besides, exhibits a sufficient antistatic property, thus suitable as a glass plate interleaf sheet.

The present invention provides a cover element having a pressure-sensitive adhesive sheet preliminarily laminated thereto, wherein the pressure-sensitive adhesive sheet comprises a pressure-sensitive adhesive layer in which a refractive index adjustment zone having a refractive index greater than that of a base pressure-sensitive adhesive material thereof is formed over a given range from a surface of the pressure-sensitive adhesive layer in a thickness direction thereof, whereby: in a lamination process of a customer which is a supply destination of the cover element, it becomes possible to eliminate a need to distinguish between obverse and reverse sides of the pressure-sensitive adhesive sheet itself; and, when the cover element is bonded to an optical element through the pressure-sensitive adhesive layer, it becomes possible to suppress internal reflection in a laminate formed of these optical elements.

An antireflection film is provided and includes a base material layer that contains a thermoplastic resin and a high refractive index layer that is superposed on at least one surface of the base material layer, while having a refractive index that is higher than the refractive index of the base material layer, and which is configured such that the high refractive index layer contains a fluorene diol, an isocyanate and a polymer of a resin material that contains a (meth)acrylate and a urethane (meth)acrylate derived from a (meth)acrylate.

A sheet for an image display unit to be provided on the front face side of an image display unit includes a substrate layer containing a cycloolefin copolymer as a principal component and an elastomer having a refractive index substantially equal to the refractive index of the cycloolefin copolymer, in an amount of no less than 2 parts by mass and no greater than 7 parts by mass with respect to 100 parts by mass of the cycloolefin copolymer. The substrate layer preferably has an average thickness of no less than 100 m and no greater than 500 m, a water absorbing rate preferably no greater than 0.5%, a tensile strength of preferably no less than 40 MPa and no greater than 70 MPa, and a tensile elongation in a longitudinal direction at 25 C. is preferably no less than 4% and no greater than 15%.

A pressure-sensitive adhesive of the invention include a (meth)acryl-based polymer obtained by polymerization of a monomer component including 30 to 99.5% by weight of an alkyl (meth)acrylate having an alkyl group of 10 to 18 carbon atoms at an ester end and 0.5 to 50% by weight of a cyclic nitrogen-containing monomer. The pressure-sensitive adhesive has a satisfactory level of adhesive performance and can form a pressure-sensitive adhesive layer with a lower dielectric constant and reliable moisture resistance.

Disclosed is display device including a display panel; a window disposed on the display panel; and an adhesive layer positioned between the display panel and the window, wherein the adhesive layer includes a polymer resin and a woven fiber.

A light control member of the invention includes a light-transmissive first substrate, a light diffusing portion which is formed on a first surface of the first substrate, and a light shielding layer which is formed in a region other than a region in which the light diffusing portion is formed on the first surface of the first substrate. The light diffusing portion includes a light emitting end surface being in contact with the first substrate, and a light incident end surface opposite the light emitting end surface and having an area larger than an area of the light emitting end surface, and is configured such that a height from the light incident end surface to the light emitting end surface is larger than a layer thickness of the light shielding layer. The light shielding layer includes an enlarged portion in a portion of the light shielding layer in a layer thickness direction, the enlarged portion being configured such that a sectional area which is cut by a plane parallel to the first surface of the first substrate is larger than an area of a substrate side end surface of the light shielding layer.

An aspect of the invention relates to an optical film including a cellulose acylate film; and a hardened layer formed by hardening a curable composition, in which the cellulose acylate film includes polyester having a cyclic structure, the curable composition at least includes a granular filler, a polyester urethane having a tensile strength of 25 MPa or greater and a tensile elongation of 200% or greater, and a curable compound, and a content of the granular filler is in a range of 15 to 60 parts by mass and a content of the polyester urethane is in a range of 1 to 10 parts by mass, with respect to 100 parts by mass of a total amount of a solid content included in the curable composition, a polarizing plate, and an image display device.

A window for a display device including: a plastic substrate including a poly(imide-amide) copolymer, which is a reaction product of a reagent combination of 4,4-hexafluoroisopropylidene diphthalic anhydride, 3,3,4,4-biphenyltetracarboxylic dianhydride, 2,2-bis-trifluoromethyl-4,4-biphenyldiamine, and terephthaloyl chloride, and a hard coating layer disposed on at least one side of the plastic substrate, wherein the plastic substrate has pencil scratch hardness of greater than or equal to 3H when measured according to an ASTM D3363 standard at a vertical load of about 0.5 kilograms, and a peak intensity ratio A2/A1 of a peak intensity A2 at a position of about 23.5 in 2 to a peak intensity A1 at a position of about 15.5 in 2 of an X-ray diffraction spectrum is greater than or equal to about 0.8.

The present invention provides a hard coating film having excellent optical characteristics and adhesion of a hard coating layer, and having excellent adhesion to a laminated film formed on the hard coating film.

The hard coating film comprises a hard coating layer containing an ionizing radiation curable resin composition provided on at least one surface of a base film, the hard coating film satisfying the following conditions (I), (II), and (III): condition (I): the ionizing radiation curable resin composition comprising an acrylic resin containing a (meth)acryloyl group; condition (II): a peak area ratio 1 ((A/B)100) of 5% or more (provided that in infrared spectrum measurement of the ionizing radiation curable resin composition in an uncured state, a peak area appearing at 3250 to 3500 cm.sup.1 is defined as A, and a peak area appearing at 1650 to 1800 cm.sup.1 is defined as B); and condition (III): a peak area ratio 2 ((C/B)100) of 30% or less (provided that in infrared spectrum measurement of the ionizing radiation curable resin composition in an uncured state, a peak area appearing at 1500 to 1580 cm.sup.1 is defined as C, and a peak area appearing at 1650 to 1800 cm.sup.1 is defined as B).