Mitsubishi Chemical Corporation

The Nippon Synthetic Chemical Industry Co., Ltd.

Basf Se Corporation

Norihito Sakai

Mitsuo Shibutani

Kaoru Inoue

Kazutoshi Tsuji

Tomoya Fujita

Chizuko Furo

Shusaku Mandai

Takahiro Saka

Yoshihito Yamauchi

Yasuhiro Suzuki

Gabriel Skupin

Yuya Kanamori

Lars Boerger

A method for producing a polyvinyl alcohol resin having an absorbance of not less than 0.2 at 280 nm, which includes: melt-kneading a polyvinyl alcohol resin material; extruding the resulting melt-kneaded polyvinyl alcohol resin into a sheet; cooling the resulting polyvinyl alcohol resin sheet; and pulverizing the cooled polyvinyl alcohol resin sheet. The method ensures a higher productivity and an excellent long-run property.

Method for producing polyvinyl alcohol resin

Disclosed is a support material for a fused deposition modeling. The support material has excellent adhesion to a variety of model materials and is easily dissolved and removed by washing with water. Also, the waste liquid (PVA-based aqueous solution) generated after the washing operation may be allowed to be drained as it is, in compliance with environmental regulations. The support material comprises (A) PVA-based resin having a group containing sulfonic acid or a salt thereof and (B) biodegradable polyester. The (A) PVA-based resin having a group containing sulfonic acid or a salt thereof and (B) biodegradable polyester have a sea-island structure in which one is dispersed in the other as a matrix.

Support material for fused deposition modeling, and manufacturing method of fused deposition modeled structure and three-dimensional object using same

As a molded article that has gas barrier properties even if a gas barrier layer is not provided and that also has molding stability and biodegradability, there is proposed a molded article containing an aliphatic polyester-based resin (A) and a polyvinyl alcohol-based resin (B) as main component resins, wherein the molded article has a resin phase-separated structure having a continuous phase including the aliphatic polyester-based resin (A) as a main component, and a ribbon-like dispersed phase including the polyvinyl alcohol-based resin (B) as a main component.

Molded article and method for producing molded article

A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.

Diverting agent and method of filling fracture in well using the same

The present invention aims to provide a fused deposition modeling type additive manufacturing material which has flexibility when molded into a filamentous material such as a filament, and can exhibit an excellent manufacturing property when additive manufacturing is performed using a molded product thereof, and the fused deposition modeling type additive manufacturing material according to the present invention contains: a polyvinyl alcohol-based resin; a polyethylene glycol having a weight average molecular weight of 200 to 1,000; and a carboxylic acid metal salt in an amount of 0.8 mass % or less with respect to the polyvinyl alcohol-based resin.

Fused deposition modeling type additive manufacturing material

The present invention provides a molding material excellent in dimensional stability and operation safety during surface treatment after molding. The molding material according to the present invention is for use in molding by a hot melt lamination method and contains an ethylene-vinyl alcohol copolymer.

Molding material, molded product, and method for producing molded product

A packaging bag for packaging a melt-processable polyvinyl alcohol resin is formed from a film having a methanol vapor transmission rate of 0.5 to 1000 g/m&#xb7;day. A method of storing a melt-processable polyvinyl alcohol resin includes the step of sealingly packaging melt-processable polyvinyl alcohol resin particles with the use of the packaging bag formed from the aforementioned film. Where the melt-processable polyvinyl alcohol resin is packaged with the use of the packaging bag, therefore, an organic solvent remaining in the packaged polyvinyl alcohol resin can be released in the form of vapor to the outside through the packaging bag to dissipate, whereby the resulting polyvinyl alcohol resin has a reduced organic solvent concentration after storage thereof in the packaging bag. As a result, the melt-processable polyvinyl alcohol resin is improved in forming stability.

Packaging bag, and method for storing melt-processable polyvinyl alcohol resin with the use of the packaging bag

A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.

Support material for laminate shaping, product laminate-shaped by using the same, and laminate-shaped product production method

The present invention provides the resin composition having excellent inflation moldability by which a film having high water vapor transmission rate (WVTR) and low elastic modulus can be produced, and a film which is formed from the resin composition. The present invention relates to a resin composition comprising a polyamide resin (A) and a polyvinyl alcohol-based resin (B) which includes 2-10% by mole of structural unit represented by the following general formula (1) and has a degree of saponification of 70-90% by mole, and a film which is formed from the resin composition. 

Resin composition and film formed from said resin composition

Provided is a resin composition from which a melt molded product which is excellent in transparency, gas barrier property and flexibility and has biodegradability can be obtained. The present invention relates to a resin composition, which comprises a polyvinyl alcohol-based resin (i) comprising a structural unit represented by the following general formula (1) and an aliphatic-aromatic polyester (ii) comprising a specific component, wherein each of R, Rand Rindependently represents a hydrogen atom or an organic group, X represents a single bond or a bonding chain, and each of R, Rand Rindependently represents a hydrogen atom or an organic group. 

Resin composition and molded product thereof

There is provided a resin composition affording a melt-molded article having excellent gas barrier properties and flex crack resistance. The present invention relates to a resin composition comprising a polyvinyl alcohol resin (A) having a 1,2-diol structural unit represented by the following general formula (1), a styrene-based thermoplastic elastomer (B), and a polyamide graft block copolymer (C) containing a polymer block of an aromatic vinyl compound and a polymer block of an olefinic compound in a main chain and having a graft chain composed of a polyamide: wherein each of R, R, and Rindependently represents a hydrogen atom or an organic group, X represents a single bond or a linking chain, and each of R, R, and Rindependently represents a hydrogen atom or an organic group.

Resin composition and molded article thereof

Disclosed is a polyvinyl alcohol resin composition capable of providing a melt-molded article with superior gas barrier properties and flex crack resistance. The resin composition comprises (A) a PVA resin having 1,2-diol unit in side chain thereof; and (B) a mixture of block copolymers each having an aromatic vinyl polymer block, and a conjugated diene polymer block and/or hydrogenated thereof, wherein the (B) mixture of block copolymers includes (B1) a block copolymer having no carboxyl group and (B2) a block copolymer modified with a carboxyl group-containing compound.

Polyvinyl alcohol resin composition and molded article thereof

A PVA resin composition is provided which is excellent in melt-formability and free from emanation of odor in a melt-forming process, and is capable of providing a product free from residual odor, a highly transparent film and a laminate film having higher interlayer adhesive strength. The resin composition comprises: (A) a polyvinyl alcohol resin having a 1,2-diol structural unit represented by the following formula (1): 

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Osaka, Japan

Norihito Sakai