An object of the present invention is to provide a golf club grip having high tensile strength in the outer layer and little entrainment of air between the outer layer and the inner layer. The present invention provides a golf club grip comprising a cylindrical portion composed of a cylindrical inner layer and a cylindrical outer layer covering the inner layer, wherein a ratio (E′.sub.23/E′.sub.60) of a storage modulus (E′.sub.23) at 23° C. of the outer layer to a storage modulus (E′.sub.60) at 60° C. of the outer layer, measured with a dynamic viscoelasticity measuring apparatus under measuring conditions of an oscillation frequency: 10 Hz, a strain amplitude: 0.05%, and a tensile mode, ranges from 1.20 to 1.32.

An object of the present invention is to provide a golf club grip having high tensile strength in the outer layer and little entrainment of air between the outer layer and the inner layer. The present invention provides a golf club grip comprising a cylindrical portion composed of a cylindrical inner layer and a cylindrical outer layer covering the inner layer, wherein a ratio (E′.sub.23/E′.sub.60) of a storage modulus (E′.sub.23) at 23° C. of the outer layer to a storage modulus (E′.sub.60) at 60° C. of the outer layer, measured with a dynamic viscoelasticity measuring apparatus under measuring conditions of an oscillation frequency: 10 Hz, a strain amplitude: 0.05%, and a tensile mode, ranges from 1.20 to 1.32.

To provide an aqueous ink composition for ballpoint pen having excellent ink discharge properties at the initial writing (initial touch) even after exposure of the pen tip for a long period of time. The aqueous ink composition for ballpoint pen contains at least 0.1 to 5% by mass of a graft compound of an allyl alcohol-maleic anhydride-styrene copolymer composed of: (a) a polyoxyalkylene alkyl ether unit represented by Formula (I), (b) a maleic anhydride unit, and (c) a styrene unit, the allyl alcohol-maleic anhydride-styrene copolymer having the composition ratio (a):(b):(c) of 25 to 75:25 to 75:0 to 50% by mol and having a mass average molecular weight from 1000 to 50000, and polyoxyalkylene monoalkyl alcohol; 5 to 40% by mass of resin particles; and water; wherein in Formula (I), R represents an alkyl group having 1 to 5 carbons, and m is a positive number of 5 to 50. ##STR00001##

A heat curable resin composition which allows voids to be removed by heating and vacuum operation after reflow soldering, and a circuit board with an electronic component mounted thereon are provided. The heat curable resin composition of the present embodiment includes a liquid epoxy resin, a hemiacetal ester derived from monocarboxylic acid and polyvinyl ether, a curing agent, and a filler.

A heat curable resin composition which allows voids to be removed by heating and vacuum operation after reflow soldering, and a circuit board with an electronic component mounted thereon are provided. The heat curable resin composition of the present embodiment includes a liquid epoxy resin, a hemiacetal ester derived from monocarboxylic acid and polyvinyl ether, a curing agent, and a filler.

There is provided a packaging material comprising a fibre based substrate and a gas barrier layer based on a polyvinyl alcohol (PVOH), wherein said gas barrier layer comprises an interpolymer complex forming agent (IPCFA), which IPCFA is a water-soluble polymer exhibiting functional groups capable of forming hydrogen bonds with —OH groups of the PVOH. Said PVOH has a weight average molecular weight (M.sub.w) measured according to ASTM D4001-13 in the range of about 80 kg/mol to 135 kg/mol, the proportion of said IPCFA to PVOH in said gas barrier layer is in the range of 0.5 to 7.0% (w/w) and said packaging material has an oxygen permeability (OP) below 14 ml μm/m.sup.2 day atm, which OP is obtained by multiplying the oxygen transmission rate (OTR) of the packaging material measured according to ASTM F1927-7 at a relative humidity (RH) of 80% and 23° C. by the thickness of the gas barrier layer.

There is provided a packaging material comprising a fibre based substrate and a gas barrier layer based on a polyvinyl alcohol (PVOH), wherein said gas barrier layer comprises an interpolymer complex forming agent (IPCFA), which IPCFA is a water-soluble polymer exhibiting functional groups capable of forming hydrogen bonds with —OH groups of the PVOH. Said PVOH has a weight average molecular weight (M.sub.w) measured according to ASTM D4001-13 in the range of about 80 kg/mol to 135 kg/mol, the proportion of said IPCFA to PVOH in said gas barrier layer is in the range of 0.5 to 7.0% (w/w) and said packaging material has an oxygen permeability (OP) below 14 ml μm/m.sup.2 day atm, which OP is obtained by multiplying the oxygen transmission rate (OTR) of the packaging material measured according to ASTM F1927-7 at a relative humidity (RH) of 80% and 23° C. by the thickness of the gas barrier layer.

A biocompatible membrane including a crosslinking agent, a hydrophilic material, a hydrophobic material, and a solvent; the biocompatible membrane can implement simultaneous regulation of oxygen and glucose, thereby improving the stability and service life of a biocompatible membrane solution, a preparation method for the biocompatible membrane and an implantable biosensor.

A biocompatible membrane including a crosslinking agent, a hydrophilic material, a hydrophobic material, and a solvent; the biocompatible membrane can implement simultaneous regulation of oxygen and glucose, thereby improving the stability and service life of a biocompatible membrane solution, a preparation method for the biocompatible membrane and an implantable biosensor.

Provided is an optical article having a substrate, a primer layer generated by curing a polymerizable composition for forming the primer layer, and a photochromic layer containing a photochromic compound in this order, in which the polymerizable composition for forming the primer layer contains a component A: a polyisocyanate, a component B: a hydroxy group-containing polymerizable compound, and a component C: a polymerizable compound having a viscosity of 100 cP or less and being selected from the group consisting of (meth)acrylates and vinyl ethers.