Toray Industries, Inc.

Natureworks LLC

Hiroyuki Ome

Yoshitake Takahashi

Tatsuya Nagano

Takuma Naotsuka

Masayuki Koshi

Ken Sudo

Tsuyoshi Tanaka

Bo Yu

Xiao Ping Guo

Yong Gen He

Mitsushige Hamaguchi

Sadanori Kumazawa

Naoya Ouchiyama

Kenichi Utazaki

Toru Takahashi

Shoma Ishida

Akihiko Shirahase

Eita Konno

Yasuto Tachibana

Pujing Zuo

Tomoko Nasuno

Kexin Zhu

Yong He

A multiaxial fabric resin base material includes a multiaxial fabric base material laminate impregnated with a thermosetting resin (B), the multiaxial fabric base material laminate including fiber bundle sheets layered at different angles, the fiber bundle sheets including unidirectionally aligned fiber bundles stitched with stitching yarns composed of a thermoplastic resin (A), the multiaxial fabric base material laminate being penetrated in the thickness direction by other bodies of the stitching yarns, and being stitched with the other bodies of the stitching yarns such that the yarns reciprocate at predetermined intervals along the longitudinal direction, the thermoplastic resin (A) constituting the stitching yarns having a softening point, the softening point being higher than the resin impregnation temperature of the thermosetting resin (B).

Multiaxial textile resin base material and method of production thereof

A fiber-reinforced polyamide resin base material comprises continuous reinforcing fibers, or comprises a reinforcing fiber base material in which discontinuous reinforcing fibers are dispersed, impregnated with a polyamide resin. In the polyamide resin, at least part of the polymer constituting the polyamide resin is an end-modified polyamide resin having, at an end group of the polymer, a structure constituted by a structural unit different from a repeating structural unit constituting the backbone of the polymer. A fiber-reinforced polyamide resin base material having an excellent impregnation property and thermal stability, less void, and excellent surface quality is provided.

Fiber-reinforced polyamide resin base, method for producing same, molded article containing same, and composite molded article

A fiber-reinforced thermoplastic-resin base includes continuous reinforcing fibers aligned in parallel to each other and a thermoplastic resin is impregnated thereinto, wherein the base has a fiber volume content of 40-65 vol % and a dispersion parameter D of the fibers, determined by (i)-(iv), of 90% or more: (i) a cross-section of the fiber-reinforced thermoplastic-resin base that is perpendicular to the alignment direction of the reinforcing fibers is divided into a plurality of sections, and one of the sections is photographed, (ii) the photograph image of the section is divided into a plurality of square units each having a one-side length t, (iii) a dispersion parameter d is calculated, (iv) with respect to other sections, (i) to (iii) are repeatedly performed, and an average value of dispersion parameters d of the plurality of sections is dispersion parameter D.

Fiber-reinforced thermoplastic-resin base and molded article obtained therefrom

Provided is a method of recovering gaseous hydrocarbons and/or liquid hydrocarbons from underground, characterized by using a polylactic acid) resin comprising an a poly-L-lactic acid component and a poly-D-lactic acid component and having a heat of fusion at 190&#xb0; C. or higher, as measured by differential scanning calorimetry, of 20 J/g or more, wherein the underground is at a depth of 3,000 m or deeper. According to the recovery method of the present invention, shale gas, shale oil, and the like can be recovered efficiently.

Method for recovery of gaseous hydrocarbons and/or liquid hydrocarbons from underground

A polylactic acid resin composition includes: 0.005 parts by weight to 1.2 parts by weight of a metal phosphate represented by Formula (1):MHPO&#x2003;&#x2003;(1)(in Formula (1), M is an alkali metal atom or an alkaline earth metal atom, and x, y, and z are integers satisfying 1&#x2266;x&#x2266;2, 1&#x2266;y&#x2266;4, and 2&#x2266;z&#x2266;8, respectively) with respect to 100 parts by weight of a polylactic acid resin including a poly-L-lactic acid component and a poly-D-lactic acid component, wherein a crystallization enthalpy of crystals in the polylactic acid resin is not less than 5 J/g when a temperature of the polylactic acid resin composition is increased to 250&#xb0; C., and the temperature is kept constant for 3 minutes, followed by decreasing the temperature at a cooling rate of 20&#xb0; C./min in differential scanning calorimetry.

Polylactic acid resin composition, molded product, and method of manufacturing polylactic acid resin composition

A method of producing a polylactic acid block copolymer constituted of a segment(s) composed of L-lactic acid units and a segment(s) composed of D-lactic acid units, includes obtaining a mixture by mixing poly-L-lactic acid and poly-D-lactic acid one of which has a weight average molecular weight of 60,000 to 300,000 and the other of which has a weight average molecular weight of 10,000 to 50,000, the mixture having a weight average molecular weight of not less than 90,000 and a degree of stereocomplexation (Sc) satisfying: Sc=&#x394;Hh/(&#x394;Hl+&#x394;Hh)&#xd7;100&#x3e;60 (wherein &#x394;Hh represents the heat of fusion of stereocomplex crystals (J/g), and &#x394;Hl represents the heat of fusion of crystals of poly-L-lactic acid alone and crystals of poly-D-lactic acid alone (J/g)); and subsequently subjecting the mixture to solid-phase polymerization at a temperature lower than the melting point of the mixture.

Method for producing polylactic acid block copolymer

The present invention is directed to a method for producing a polylactic acid resin, including the step of subjecting a crystallized prepolymer, which is a prepolymer including a lactic acid unit as a main component, and has an optical purity (Ea) of 60 to 94%, a weight average molecular weight of 5,000 to 100,000, and a crystal melting enthalpy (&#x394;Hma) of 4 to 50 J/g, to solid phase polymerization. According to the present invention, it is possible to obtain a polylactic acid resin which is excellent in moldability upon melt processing and drawdown resistance upon melt processing, and is also excellent in hydrolysis resistance.

Polylactic acid resin and method for producing same

A method of producing a poly(lactic acid) resin includes carrying out direct polycondensation using lactic acid as a main raw material to prepare a crystallized prepolymer having a weight average molecular weight of 5,000 to 25,000, an enthalpy of fusion &#x394;Hm of 50 to 65 J/g and an acid value A mol/ton satisfying (1) below:450/(Mw/10,000&#x2212;0.14)&#x3c;&#x3c;950/(Mw/10,000&#x2212;0.14)&#x2003;&#x2003;(1)(wherein Mw represents weight average molecular weight of the crystallized prepolymer); and subjecting the crystallized prepolymer to solid-phase polymerization.

Process for production of poly(lactic acid)-type resin, and poly(lactic acid)-type prepolymer

A method for producing a crystallized polyester comprises the crystallization step of applying a shear and/or a pressure to a polyester selected from an aliphatic polyester and a polyalkylene terephthalate at a temperature of (Tm&#x2212;70&#xb0; C.) to (Tm+20&#xb0; C.), where Tm is a melting point of the polyester, thereby converting the polyester into a state having a crystallinity of 10% or more and fluidity.

Method for producing crystallized polyester

A method for producing an aliphatic polyester resin including a melt polymerization step and a subsequent solid phase polymerization step, using a sulfonic acid group-containing compound as a catalyst, wherein the addition amount of the sulfonic acid group-containing compound during melt polymerization is 300 to 3000 ppm with respect to a raw material monomer calculated as sulfur atoms, the content of the sulfonic acid group-containing compound during melt polymerization is 300 to 3000 ppm with respect to a produced polymer calculated as sulfer atoms, and a residual rate of the sulfonic acid group-containing compound after solid phase at polymerization is more than 50.

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Nagoya, Japan

Hiroyuki Ome