Kuraray Co., Ltd.

Hyogo

Mitsunori Asada

Osamu Kazeto

Minoru Okamoto

Sayaka Shimizu

Yoshihiro Morishita

Takeshi Kusudou

Shinya Oshita

Koichiro Isoue

Makoto Okamoto

Takuya Kobayashi

Taiga Yui

Yohei Kamata

Eriko Kometani

Yaqi Li

Hajime Kishi

Yumi Kunimitsu

Jin Imade

A water-soluble film is provided that is excellent in film transparency and water solubility and inhibits sticking between the films. A water-soluble film includes a polyvinyl alcohol resin, wherein a crystallite size obtained from an X-ray profile obtained by wide-angle X-ray measurement is from 4.0 to 5.5 nm and a degree of crystallization obtained from the X-ray profile is from 10.0% to 25.0%, and an external haze is from 7.0% to 30.0%.

Water-soluble film and package

A water-soluble film is provided that is capable of achieving deformation resistance during pouch storage as well as excellent water solubility of the film and excellent reduction in undissolved residues. A water-soluble film includes a polyvinyl alcohol-based resin, wherein a crystal long period Ds obtained from an X-ray profile obtained by small-angle X-ray scattering measurement in a water/methanol mixed solvent (volume ratio: 2/8) is from 10.0 to 30.0 nm and a rate of increase (DS−Da)/Da of the crystal long period Ds to a crystal long period Da obtained by small-angle X-ray scattering measurement before immersion in the solvent is 30% or more and 130% or less.

Water-soluble film and packaging material

The present invention provides an interlayer film for laminated glass which has excellent sound insulating properties even when the thickness is reduced, and also has a low degree of orientation and low shrinkability. The invention relates to an interlayer film for laminated glass which includes at least one layer A containing a thermoplastic elastomer, wherein the thermoplastic elastomer includes a hard segment block and a soft segment block, the layer A has a sea-island phase separated structure in which the hard segment block is included as an island component and the soft segment block is included as a sea component, and the degree of orientation (1) defined by (maximum intensity value&#x2212;minimum intensity value)/(maximum intensity value+minimum intensity value) based on the maximum intensity value and the minimum intensity value in an arbitrary azimuth range of 180&#xb0; including the azimuth at which the intensity reaches the maximum in the azimuthal intensity distribution of periodic scattering or coherent scattering by the hard segment block or the soft segment block obtained for the layer A by small-angle X-ray scattering measurement is 0.9 or less.

Interlayer film for laminated glass and laminated glass

A resin composition superior in stability and external appearance characteristics during/following melt molding; and an extrusion-molded article, an injection-molded article and a blow-molded article that are formed from the resin composition are provided. The resin composition contains an ethylene-vinyl alcohol copolymer as a principle component, and has a heterogeneous nucleation index (f) of less than 0.6 as determined by formula (1) based on a differential scanning calorimetry (DSC) curve obtained by DSC in which the resin composition is cooled at a rate of 150&#xb0; C./sec from a molten state at 210&#xb0; C. In the formula (1), Qrepresents an area of a total region surrounded by the DSC curve and a base line, and Qrepresents an area of a heterogeneous region that is a part of the total region, falling within a range from the temperature lower than the melting point by 38&#xb0; C. to a temperature lower than the melting point by 75&#xb0; C.&#x2003;&#x2003;(1)

Resin composition, extrusion-molded article, injection-molded article and blow-molded article

A curable resin composition, which contains, with respect to 100 parts of an epoxy resin, 1 to 70 parts of an epoxy resin curing agent and 1 to 50 parts of an acrylic block copolymer, and the acrylic block copolymer contains (&#x3b1;) at least one polymer block A composed of a structural unit derived from an alkyl methacrylate and at least one polymer block B composed of a structural unit derived from an alkyl acrylate, has a weight average molecular weight (Mw) of 30,000 to 300,000 and a molecular weight distribution (Mw/Mn) of 1.5 or less, and contains 3 to 60 percent by mass of the polymer block A. In addition, a cured resin is formed from the above curable resin composition.

Curable resin composition and cured resin

Growing community of inventors

Kurashiki, Japan

Mitsunori Asada