摘要:
A low-resilience polyurethane foam is produced by allowing a low-resilience polyurethane foam composition containing polyisocyanate (a), polyol (b), catalyst (c), and blowing agent (d) to react. The polyisocyanate (a) contains bis(isocyanatomethyl)cyclohexane, and the polyol (b) contains 5 to 30 mass% of polyol (b-1) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 20 to 70 mgKOH/g, and 70 to 95 mass% of polyol (b-2) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 140 to 300 mgKOH/g.
摘要:
A low-resilience polyurethane foam is produced by allowing a low-resilience polyurethane foam composition containing polyisocyanate (a), polyol (b), catalyst (c), and blowing agent (d) to react. The polyisocyanate (a) contains bis(isocyanatomethyl)cyclohexane, and the polyol (b) contains 5 to 30 mass% of polyol (b-1) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 20 to 70 mgKOH/g, and 70 to 95 mass% of polyol (b-2) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 140 to 300 mgKOH/g.
摘要:
A spunbonded elastic nonwoven fabric according to the invention comprises fibers formed from a polymer comprising a thermoplastic polyurethane elastomer, wherein the thermoplastic polyurethane elastomer has a solidifying point of 65°C or above as measured by a differential scanning calorimeter (DSC) and contains 3.00×10 6 or less polar-solvent-insoluble particles per g as counted on a particle size distribution analyzer, which is based on an electrical sensing zone method, equipped with an aperture tube having an orifice of 100µm in diameter, and wherein the fibers have diameters such that the standard deviation of fiber diameters (Sn) divided by the average fiber diameter (X ave ) (Sn/X ave ) gives a value of 0.15 or less.
摘要:
1,4-bis(isocyanatomethyl)cyclohexane contains 70 mol% or more and 95 mol% or less of a trans isomer relative to a total amount of a cis isomer and the trans isomer, and 0.1 ppm or more and 300 ppm or less of the compound represented by formula (1) below:
摘要:
1,4-bis(isocyanatomethyl)cyclohexane contains 70 mol% or more and 95 mol% or less of a trans isomer relative to a total amount of a cis isomer and the trans isomer, and 0.1 ppm or more and 300 ppm or less of the compound represented by formula (1) below:
摘要:
The eyewear material is an eyewear material containing thermoplastic polyurethane. The eyewear material has a tanδ peak at both less than 0°C and 0°C or more and 70°C or less observed in dynamic viscoelasticity measurement in tensile mode under the measurement conditions of a temperature increase speed of 5°C/min and a measurement frequency of 10Hz.
摘要:
A spun-bonded stretch nonwoven fabric which comprises fibers formed from a polymer containing a thermoplastic polyurethane elastomer, characterized in that the thermoplastic polyurethane elastomer exhibits a starting temperature for freezing of 65°C or higher as measured by differential scanning calorimetry (DSC) and a number of particles insoluble in a polar solvent of three million pieces/g or less as measured by using a particle size distribution measuring instrument according to the pore electric resistance method, provided with an aperture of 100 µm, and the fibers exhibit a value (Sn/Xave) obtained by dividing the standard deviation (Sn) of their diameters by the average (Xave) of the diameters of 0.15 or less.