Abstract: The present disclosure provides a cover window for a flexible display device comprising a laminate including a light-transmitting substrate or polymer substrate; and a first hard coating layer and a second hard coating layer each formed on both surfaces of the light-transmitting substrate or the polymer substrate, wherein a ratio of a modulus of the first hard coating layer to the total modulus of the laminate is 1.5 to 2.0, and wherein a surface pencil hardness measured from the first hard coating layer side is 5H or more based on 750 g, and a flexible display device comprising the cover window.

Abstract: A laminate includes a polycarbonate substrate and an ultraviolet hard coat film disposed on the polycarbonate substrate. The ultraviolet hard coat film may include a polyethylene terephthalate (PET) layer, an adhesive interposed between the PET layer and the polycarbonate substrate, and an exterior hard coat disposed on the PET layer opposite the polycarbonate substrate. The exterior hard coat may include UV stabilizers. The laminate may include additional ultraviolet hard coat films stacked on the ultraviolet hard coat film. The laminate may be thermoformed into the shape of a curved vehicle windshield.

Abstract: A composite material is disclosed including: a first material including a plurality of crosslinked first polymer chains including a plurality of first polymer monomeric units; a coating layer on the surface of the first material, wherein the coating layer includes a plurality of adhesion polymer chains, wherein the plurality of adhesion polymer chains includes a plurality of the first polymer monomeric units and a plurality of first bond-forming units, wherein the adhesion polymer chains are interwoven with the first polymer chains; and a second material including a plurality of second polymer chains, wherein the coating layer is disposed in-between the first and the second material and contacting the surface of the first and the second material, and a portion of the second polymer chains includes a plurality of second polymer monomeric units and second bond-forming units; wherein the first and the second bond-forming units form one or more bonds.

Abstract: Disclosed is a fixing member in which adhesion of foreign substances to its surface is suppressed, and which hardly causes lateral displacement when such fixing members are attached together to form a joined state. The fixing member disclosed herein includes a surface having a coefficient of kinetic friction of 1.50 or less, an arithmetic mean roughness Ra of 5.00 ?m or less, and a shear stress at the time of self-attachment of 100.00 N or more.

Abstract: The embodiments relate to a polyamide-imide film excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-imide film, which comprises a polyamide-imide polymer and has a reduced modulus of a top surface measured by the nanoindentation method according to the ISO 14577-2 standard of 5.6 GPa or more and a haze of 1% or less, a process for preparing the same, and a cover window and a display device comprising the same.

Abstract: An amide acid oligomer (AAO) solution, methods of making the same, powder, AAO solution prepregs, AAO dry prepreg, imide prepregs, and fiber reinforced polyimide composites with high temperature resistance and excellent mechanical properties are disclosed herein. In some embodiments, a method of making an AAO solution includes dissolving an aromatic diamine and an aromatic tetracarboxylic compound in a solvent to form a mixture, wherein the solvent has a boiling point of less than 150° C.; stirring the mixture at a temperature ranging from about 5° C. to about 60° C. for about I hour to about 24 hours to form a reaction solution; adding unsaturated acid anhydride to the reaction solution; and stirring the reaction solution at a temperature ranging from about 5° C. to about 60° C. for about 1 minute to about 180 minutes to form an amide acid oligomer solution, the amide acid oligomer solution having amide acid oligomer in the solvent.

Abstract: Provided is an electrophotographic belt having an endless shape including a base layer, wherein the base layer includes a polyimide film containing polyimide serving as a binder resin and a carbon nanotube, wherein the polyimide has an imidization ratio of 80% or more, wherein the carbon nanotube has at least one resin selected from the group consisting of: polyphenylsulfone; polysulfone; and polyethersulfone present on at least part of a surface thereof. The base layer has a tensile strength of 200 MPa or more in each of a peripheral direction thereof and a direction perpendicular to the peripheral direction.

Abstract: The present disclosure relates to a cover window for a flexible display device comprising: a light-transmitting substrate; and a first hard coating layer and a second hard coating layer which are formed on both sides of the light-transmitting substrate, respectively, wherein each of the first hard coating layer and the second hard coating layer has IR spectra in which a ratio of the amide C?O peak to the ester C?O peak is in a predetermined range, and a flexible display device including the cover window for a flexible display device.

Abstract: In a first aspect, a consolidated polymer film includes a first polymer layer having a first elastic modulus, wherein the first polymer layer comprises a non-melt-processible polymer comprising a polyimide, a poly(amide-imide), a block copolymer of a polyimide or a poly(amide-imide) or a mixture thereof, and a second polymer layer having a second elastic modulus, wherein the second polymer layer comprises a polyimide, a poly(amide-imide), a block copolymer of a polyimide or a poly(amide-imide) or a mixture thereof. A minor surface of the first polymer layer is in contact with a minor surface of the second polymer layer. The first elastic modulus is different from the second elastic modulus. The first and second polymer layers are bonded by consolidation.

Abstract: A multilayer film having a soluble tie layer and method for dissipating the soluble tie layer from the multilayer film is disclosed. The multilayer film having a first outer layer; a first soluble tie layer comprising at least 10 wt %, at least 40 wt %, or at least 50 wt % of a neutralized ethylene acrylic acid copolymer. The soluble tie layer dissipates from the multilayer film when placed in a caustic solution.

Abstract: A layered body which allows a reduction in residual volatile component and a method for producing the layered body. A reinforcing fiber composite material which has high heat resistance and superior mechanical strength and a method for producing the reinforcing fiber composite material. A method includes fusing together a plurality of layers each of which contains: a powder of an imide oligomer represented by a specific general formula; and reinforcement fibers.

Abstract: The polyamide resin composition of the present invention comprises: about 15 to about 49 wt % of an aromatic polyamide resin containing a repeating unit represented by chemical formula 1 and a repeating unit represented by chemical formula 2; about 1 to about 30 wt % of a polyamide resin having a glass transition temperature of about 40 to about 120° C.; about 1 to about 20 wt % of an olefin-based copolymer; about 5 to about 40 wt % of calcium carbonate; and about 5 to about 40 wt % of talc. The polyamide resin composition and the molded product formed therefrom are excellent in plating adhesion, impact resistance, stiffness, heat resistance, flowability, appearance characteristics, and the like.

Abstract: Provided among other things is an elastomeric article providing a chemical barrier, the article having a layered structure comprising a sequential laminate of: (a) a latex-based elastomeric polymeric barrier layer; (b) a non-reactive tie adhesive resin layer comprising oxo (—(C?O)—) groups; and (c) a polyamide layer; wherein the layered structure has a first side nearest the latex-based elastomeric polymeric barrier layer and a second side; wherein the layered structure is effective to provide a chemical permeation time in excess of 100 minutes pursuant to EN 16523-1:2015 for benchmark solvents of acetone, ethyl acetate and methanol, when applied to the first side, and in excess of 100 minutes for acetone when applied to the second side; and wherein the elastomeric layer is primarily not polyolefin.

Abstract: The present invention relates to a polyamide resin film having improved UV shielding function by using a polyamide resin having a backbone chain of alternative structure of two types of polyamide segments; and a resin laminate using the polyamide resin film.

Abstract: A gas barrier film formed of a cured product of a mixture including a polycarboxylic acid, a polyamine compound, and a polyvalent metal compound, in which in an infrared absorption spectrum of the gas barrier film, an area ratio of an amide bond represented by B/A is equal to or less than 0.380, an area ratio of a carboxylic acid represented by C/A is equal to or less than 0.150, and an area ratio of carboxylate represented by D/A is equal to or more than 0.520.

Abstract: Provided is a multilayered article and a multilayered container having excellent delamination resistance while maintaining an excellent oxygen barrier property. The multilayered article includes a polyester resin layer and a barrier layer, wherein a polyamide resin contained in the barrier layer contains from 90 to 10 parts by mass of a polyamide resin (B) per 10 to 90 parts by mass of a polyamide resin (A). In the polyamide resin (A), 70 mol % or more of structural unit derived from a diamine is derived from xylylenediamine, and over 90 mol % of structural unit derived from a dicarboxylic acid is derived from adipic acid. In the polyamide resin (B), 70 mol % or more of structural unit derived from a diamine is derived from xylylenediamine, and of structural unit derived from a dicarboxylic acid, from 30 to 65 mol % is derived from an am-linear aliphatic dicarboxylic acid having from 4 to 20 carbons and from 70 to 35 mol % is derived from isophthalic acid.

Abstract: To provide a method for producing a polyamide resin film by using a polyamide resin obtained through polymerization of a regenerated monomer used as a recycled material. Provided is a method for producing a polyamide resin film, including: (1) a step of producing a monomer from a raw material (A) for depolymerization, (2) a step of producing a polyamide resin (B) through polymerization using a raw material containing the monomer. (3) a step of refining the polyamide resin (B), and (4) a step of producing an unstretched film using a starting material containing the refined polyamide resin (B), and stretching the unstretched film.

Abstract: To provide a biaxially oriented polyamide film, even as a product that is close to an end of a mill roll, having favorable mechanical characteristics, thermal characteristics, and few S-shape curling due to moisture absorption after being made into a bag. A biaxially oriented polyamide film formed of a polyamide resin containing not lower than 60% by mass of polyamide 6, wherein a molecular orientation angle of the film is not smaller than 20°, a strain at moisture absorption of the film is not higher than 1.3%, an impact strength of the film is not lower than 0.8 J/15 ?m, and a heat shrinkage rate, after heating for ten minutes at 160° C., of the film is 0.6 to 3.0% in both an MD direction and a TD direction.

Abstract: The present disclosure relates to a polyimide-based resin film which is synthesized by the reaction of an acid anhydride compound and a diamine compound having a specific structure, a substrate for display device, and an optical device using the same.

Abstract: To provide a gas barrier biaxially oriented polyamide film and a polyamide film mill roll, even as a product that is close to an end of a mill roll, having favorable mechanical characteristics, thermal characteristics, and few S-shape curling due to moisture absorption after being made into a bag. A biaxially oriented polyamide film having at least one layer formed of a polyamide resin containing not lower than 60% by mass of poly(m-xylylene adipamide), wherein a molecular orientation angle of the film is not smaller than 20°, a strain at moisture absorption of the film is not higher than 1.3%, an impact strength of the film is not lower than 0.7 J/15 ?m, and a heat shrinkage rate, after heating for ten minutes at 160° C., of the film is 0.6 to 3.0% in both an MD direction and a TD direction.