Toyo Boseki Kabushiki Kaisha

Toyoda Gosei Co., Ltd.

Toyobo Co., Ltd.

Gaku Maruyama

Kenta Susuki

Kenichiro Kano

Takahiro Hattori

Takashi Tsuruta

Hiroaki Hagiwara

Katsuaki Kuze

Hideo Isoda

Shigeo Ukyo

Shoji Koketsu

Junji Koizumi

Haruyasu Mizutani

Mamoru Kitamura

Tomohide Nakagawa

Katsushi Ito

Daisuke Tsutsumi

Yoshinori Miyaguchi

Tsutomu Tamura

Kazuo Katayose

Yoshinori Takada

Takanori Ishikura

Makoto Ito

Shoji Kouketsu

Yasuhito Tsujii

Kaoru Ogawa

Kazuhisa Koishi

To provide a biaxially oriented polyamide-based resin film being excellent in laminate strength, pin-hole resistance under a low-temperature environment, impact resistance, and transparency, and which retains satisfactory a good external appearance even after being sterilized in hot water. A biaxially oriented polyamide-based resin film comprising a polyamide resin and 1 to 5% by mass of a polyamide-based block copolymer, wherein the polyamide-based block copolymer comprises a hard part including a residue of cyclic lactam having 4 to 10 carbon atoms, and a soft part including a residue of polyoxypropylene glycol or polyoxytetramethylene glycol having a weight average molecular weight of 500 to 3000, and the content X of the hard part and the content Y and the weight average molecular weight Mw of the soft part satisfy the following formulae (1) and (2):100(parts by mass)&#x2003;&#x2003;(1)478.74&#xd7;Mw&#x2264;93(parts by mass)&#x2003;&#x2003;(2).

Biaxially oriented polyamide-based resin film, and production method therefor

A copolymerized polyether polyamide resin for coating on or for impregnation to a woven or knitted fabric, wherein elongation and elastic modulus of the copolymerized polyether polyamide resin are not less than 1000% and not more than 15 MPa, respectively. The copolymerized polyether polyamide resin has a constitution wherein said copolymerized polyether polyamide resin is such that a soft segment comprising a polyether polyamide constituted from a polyether diamine compound and a dicarboxylic acid compound is bonded to a hard segment comprising a polyamide constituted from an aminocarboxylic acid compound and/or a lactam compound.

Copolymerized polyether polyamide resin

The present invention is a process for producing a polyester-polycarbonate type thermoplastic polyester elastomer in which a hard segment consisting of a polyester constructed of aromatic dicarboxylic acid, and an aliphatic or alicyclic diol, and a soft segment consisting mainly of aliphatic polycarbonate are connected, comprising at least a step of increasing the molecular weight of an aliphatic polycarbonate diol by a reaction of an aliphatic polycarbonate diol and a chain extender, and a step of reacting aliphatic polycarbonate and a polyester constructed of aromatic dicarboxylic acid and an aliphatic or alicyclic diol in the molten state.

Process for producing polyester-polycarbonate type thermoplastic polyester elastomer and polyester-polycarbonate type thermoplastic polyester elastomer

A fabric for an airbag includes a synthetic fiber woven fabric in which at least one side thereof is coated with a synthetic resin. A range of 0.1 to 10 g/mof the synthetic resin is adhered to the synthetic fiber woven fabric having a cover factor of less than 2000 and a FR value of 55% or more. Air permeability of the fabric under a pressure difference of 100 kPa after adhesion is 0.01 to 1.00 L/cm/min. The synthetic resin can be a polyamide-based resin having a soft segment comprising a polyol with a number average molecular weight of 100 to 5000.

Fabric for airbag

A woven fabric for an airbag includes a synthetic fiber woven fabric having a cover factor of 2000 to 2500 in which at least one side thereof is coated with a synthetic resin. Air permeability of the woven fabric under a pressure difference of 100 kPa is 0.01 to 1.00 L/cm/min. A resin film is present at an upper part of a single yarn at a thickness of 2 &#x3bc;m or less on a central cross section of a weaving yarn part. A resin film is present at an upper part of a single yarn at a thickness of 2 to 30 &#x3bc;m on a cross section at a border between weaving yarn parts. The synthetic resin can be a polyamide-based resin that includes a polyether compound of a number average molecular weight of 100 to 5000 as a soft segment.

Woven fabric for airbag

The present invention provides a thermoplastic polyester elastomer excellent in heat resistance, heat-aging resistance, water resistance, light resistance, low-temperature property and the like, and further excellent in block order-retaining ability, the thermoplastic polyester elastomer comprising a hard segment which comprises polyester constituted with aromatic dicarboxylic acid and aliphatic or alicyclic diol and a soft segment which comprises mainly aliphatic polycarbonate, wherein the hard segment and the soft segment being connected, and wherein when melting points of the thermoplastic polyester elastomer are obtained by measuring on a differential scanning calorimeter in three cycles in which a temperature is raised from room temperature to 300&#xb0; C. at a heating rate of 20&#xb0; C./min., maintained at 300&#xb0; C. for 3 minutes and lowered to room temperature at a cooling rate of 100&#xb0; C./min., a melting point difference (Tm1&#x2212;Tm3) between a melting point obtained in the first cycle (Tm1) and a melting point obtained in the third cycle (Tm3) is 0-50&#xb0; C., and a tensile strength at break is 15-100 MPa.

Method for producing thermoplastic polyester elastomer, thermoplastic polyester elastomer composition, and thermoplastic polyester elastomer

The present invention relates to such a polyamide resin composition that is suitably used as a material of a gasoline tank and a material of a molded article, such as a hollow molded container including a beverage bottle, a film and a sheet. A polyamide resin that is good in heat stability upon molding and suffers less increase in filter back pressure is provided by regulating a polyamide resin composition to have a phosphorus content of from 30 to 200 ppm (excluding 200 ppm), and a sodium content/phosphorus content ratio (molar ratio) of from 3 to 7 (excluding 3 and 7) or regulating it to have a phosphorus content less than 30 ppm and an alkali metal content less than 45 ppm.

Polyamide resin composition

A material for fuel-system parts which is excellent in impact strength, rigidity, elongation, unsusceptibility to swelling with liquid fuels including gasoline, and gasoline-barrier properties and has satisfactory moldability. The material for fuel-system parts comprises a resin composition comprising 100 parts by weight of a given polyamide resin (A) and 11 to 100 parts by weight of a resin (B) having a lower glass transition temperature than the polyamide resin (A) and having a functional group reactive with the polyamide resin (A), and has a structure in which the polyamide resin (A) serves as a matrix ingredient and the resin (B) serves as a domain ingredient.

Material for fuel-system part and fuel-system part comprising the same

Provided is a continuous production method of a polyamide with stabilized polymerization degree and good quality, particularly an aromatic-containing polyamide. A continuous production method of a polyamide, comprising (a) a raw material preparation step of individually melting a diamine and a dicarboxylic acid, or producing a salt of amine and carboxylic acid in water, (b) a raw material introduction step of continuously introducing the prepared raw materials into a tubular reaction apparatus, (c) an amidation step of passing the introduced raw materials through the tubular reaction apparatus, thereby effecting amidation to obtain a reaction mixture containing an amidated product and a condensed water, (d) an initial polymerization step of introducing the reaction mixture into a continuous reaction apparatus capable of separation and removal of water, and elevating the polymerization degree while separating and removing water at a temperature higher than the melting point of the finally obtained polyamide to obtain a polyamide prepolymer, and (e) a final polymerization step of introducing the polyamide prepolymer into a continuous reaction apparatus capable of separation and removal of water, and further elevating the polymerization degree at a temperature higher than the melting point of the finally obtained polyamide to obtain a polyamide adjusted to a desired relative viscosity [RV].

Method for continuous production of polyamide

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Tsuruga, Japan

Gaku Maruyama