Abstract:
Disclosed is a semiaromatic polyamide resin composition including a semiaromatic polyamide (A) and a polyhydric alcohol (B), wherein a mass ratio (A/B) between the semiaromatic polyamide (A) and the polyhydric alcohol (B) is 99.95/0.05 to 90/10; and the semiaromatic polyamide (A) includes as constituent components thereof an aromatic dicarboxylic acid component and an aliphatic diamine component, and has a melting point of 300 to 350° C.
Abstract:
A concealable film including 10 to 94% by mass of a crystalline polyamide resin, 1 to 40% by mass of an amorphous polyamide resin and 5 to 50% by mass of titanium oxide, with the proviso that the total content of these is 100% by mass.
Abstract:
Disclosed is a multilayer film including a resin layer formed at least on one surface of a biaxially stretched film, the resin layer including an acid-modified polyolefin resin (A), a polyurethane resin (B), a cross-linking agent (C) and an acetylene glycol-based surfactant (D), wherein the cross-linking agent (C) includes a melamine-based cross-linking agent (C1) and/or an oxazoline-based cross-linking agent (C2); the mass ratio ((A)/(B)) between (A) and (B) is 60/40 to 97/3; and the total amount of (C1) and (C2) is 1 to 20 parts by mass, or the amount of (C1) as a single substance and the amount of (C2) as a single substance are each 1 to 20 parts by mass, and the amount of (D) is 5 to 50 parts by mass in relation to 100 parts by mass of the total amount of (A) and (B).
Abstract:
A resin composition includes a copolymerized polyester resin, which exhibits excellent flexibility at room temperature, improvement in problems of brittleness, and excellent adhesiveness and moist-heat durability. The invention relates to a resin composition containing a copolymerized polyester resin which contains, as an acid component, an aromatic dicarboxylic acid and a dimer acid and, as a glycol component 1,4-butane diol and polybutadiene glycols, with the content of the dimer acid being 10 to 50 mol % in the acid component, the content of the 1,4-butane diol being 50 mol % or greater in the glycol component, and the content of the polybutadiene glycols being 0.5 to 20 mol % in the glycol component.
Abstract:
A semi-aromatic polyamide including an aromatic dicarboxylic acid component, an aliphatic diamine component and a monocarboxylic acid component and having a melting point of 300° C. or higher, wherein the monocarboxylic acid component includes a monocarboxylic acid having a molecular weight of 140 or more, and the content of the monocarboxylic acid component is 1 to 8% by mass.
Abstract:
A hollow fiber membrane is produced through a thermally induced phase separation process by dissolving a highly hydrophilic polyamide resin in a high-boiling-point solvent such as an aprotic polar solvent at a temperature of not lower than 100° C. The hollow fiber membrane has a membrane surface having a water contact angle of not greater than 80 degrees, and has a water permeability of not less than 100 L/m2·atm·h and a 0.1-μm particle rejection percentage of not less than 90%.
Abstract:
The present invention is a method for producing a polyamide resin, wherein a nylon salt obtained from a dicarboxylic acid and a diamine having a boiling point exceeding 100° C. is heated to be polymerized under normal pressure while water vapor is being allowed to be present in the polymerization reaction system.
Abstract:
The present invention provides a polyester film wherein an adhesive layer including a thermoplastic elastomer including a monovinyl substituted aromatic hydrocarbon and a conjugated diene, a compatibilizer having a glass transition temperature of 35 to 150° C., and a polyester resin having a glass transition temperature of 35 to 150° C. and a carboxyl group content of 10 to 100 mg KOH/g is laminated on a polyester substrate.
Abstract:
It is prepared to be an elastic net which is elastic in the cross machine direction and non-elastic in the machine direction. A combined sheet is obtained by joining the net and a filamentous web. The filamentous web comprises of drawn thermoplastic continuous filaments which are oriented in a machine direction. A laminated web is obtained by laying a fibrous web of staple fibers on the combined sheet. A high-pressure liquid flow is applied to the laminated web. The staple fibers are entangled among, and with the net. A method for producing a pressure-sensitive adhesive tape or sheet.
Abstract:
An object of the present invention, which was made to solve the problems above, is to provide a polyimide precursor resin composition superior in transparency allowing reduction of the residual volatile material rate during molding and giving a polyimide resin composition (e.g., polyimide film) superior in mechanical properties and transparency even when a cheaper polyamide-imide is used. The present invention relates to a polyimide precursor resin composition, comprising a polyamide-imide (A) containing a diamine monomer unit represented by the following formula (1) and a polyamic acid (B) containing at least one kind of monomer unit selected tetracarboxylic acid monomer units represented by the following formulae (2p) to (2r), wherein the haze of the film having a thickness of 40 μm obtained by imidation of the polyimide precursor resin composition is 4% or less: (wherein, R represents an alkylene group having 1 to 5 carbon atoms);