Teijin Limited

Teijin Fibers Limited

Ryoji Tsukamoto

Kenji Suzuki

Shinya Watanabe

Shinichi Kawai

Koji Furuya

Masahiko Kosuge

Tomoyoshi Yamamoto

Tomoyuki Kishino

Nobuo Minobe

Kenichi Ishihara

Mitsuru Teramoto

Seiji Ito

Minoru Suzuki

Makoto Yoshida

Shunichi Matsumura

Hiroo Inata

Hideshi Kurihara

Makoto Handa

Toshimasa Kuroda

Mikio Tashiro

Michikage Matsui

Toshihiro Santa

Hiroki Nagano

Makoto Asano

Seiji Itoh

Takafumi Kudo

Kazuo Yahata

Kenji Baba

Masaaki Tsukioka

Tomokatsu Ura

Hiroshi Honna

Toshihiro Yamada

Hiroshi Toyao

A polyester having a good color tone (a high L value and a low b value) and a low acetaldehyde content is obtained by using a catalyst containing a reaction product of (A) a titanium compound (1) represented by the general formula (I) and/or a titanium compound (2) obtained by reacting the titanium compound (1) of the general formula (I) with an aromatic polyhydric carboxylic acid represented by the general formula (II) or an anhydride thereof, with (B) a phosphorus compound (3) represented by the general formula (III). [wherein R, R, R, Rand R=a C-Calkyl group, k=1 to 3, m=2 to 4, and R=a substituted or non-substituted C-Caryl group or a C-Calkyl group].

Catalyst for preparation of polyester and process for preparing polyester using the catalyst

A tinted polyester resin composition having good color and useful for many uses (fibers, films and other formed articles) contains an aromatic polyester polymer and a tinting agent; the tinting agent is contained in a content of 0.1 to 10 ppm by mass in the composition, and has a maximum absorption wavelength in the range of from 540 to 600 nm in the absorption spectrum in the wavelength band of from 380 to 780 nm, determined in a solution of the tinting agent in a concentration of 20 mg/liter in chloroform in an optical path having a length of 1 cm; and ratios of optical absorbances A, A, Aand Aof visible light spectra at wavelengths of 400 nm, 500 nm, 600 nm and 700 nm respectively to an optical absorbance Ain the visible light spectrum at the maximum absorption wavelength, determined in the above-mentioned chloroform solution at a optical path having a length of 1 cm, satisfy the requirements of 0.00&#x2266;A/A&#x2266;0.20, 0.10&#x2266;A/A&#x2266;0.70, 0.55&#x2266;A/A&#x2266;1.00 and 0.00&#x2266;A/A&#x2266;0.05.

Orthochromatic polyester resin composition and molding product thereof

A polyester based on poly(trimethylene terephthalate) consisting essentially of trimethylene terephthalate repeating units, comprising at least one kind of compound selected from the group consisting of alkali metal compounds, alkaline earth metal compounds and manganese compounds in an amount of 10 to 150 ppm expressed in terms of the metal element in a molar ratio of the total amount of elements of the contained alkali metal elements, alkaline earth metal elements and manganese element to the amount of the contained phosphorus element within the range of the following formula (I):0&#x2266;P/M&#x2266;1&#x2003;&#x2003;(I)wherein, P is the molar amount of the phosphorus element in the polyester; M is the total amount of the alkali metal elements, alkaline earth metal elements and manganese element.

Polyester based on poly(trimethylene terephthalate)

A poly(ethylene aromatic dicarboxylate ester) resin usable for the production of fibers, films and bottle-formed articles, is produced by polycondensing a diester of an aromatic dicarboxylic acid with ethylene glycol by using a catalyst including a non-reacted mixture or reaction product of a titanium compound component including at least one member selected from titanium alkoxides and reaction products of the titanium alkoxides with aromatic polyvalent carboxylic acids or anhydrides thereof, with a specific phosphorus compound, in which catalyst the contents of titanium and phosphorus elements are controlled.

Process for producing poly(ethylene-aromatic dicarboxylate ester) resin and resin product

Polyester fiber

An aromatic polyester film, which comprises an aromatic polyester comprising 2,6-naphthalenedicarboxylic acid as the main dicarboxylic acid component and 1,3-propanediol as the main diol component and having a density of at least 1.310 g/cm . A laminated film comprising another polyester layer can be formed from this aromatic polyester film. An aromatic polyester containing a small amount of a sulfonic acid phosphonium salt used as one of the aromatic polyesters forming this laminated film is excellent in electrostatic casting properties and resistance to the contamination of an electrostatic wire, and an aromatic polyester containing an inorganic anti-fungus agent is used for antifungal application.

Trimethylene-2, 6-naphthalene dicarboxylate (co)polymer film, quaternary phosphonium sulfonate copolymer and compositions thereof

Water vapor-permeable, waterproof fabric

Crimped polyester fibers which comprise a polytrimethylene terephthalate-based polyester and have three-dimensional crimps with a number of crimps of 9 to 30 peaks/25 mm and a crimp ratio of 20 to 50% and further a crimp modulus of elasticity of 80% or above. A fiber structure wherein the weight ratio of staple fibers of the above crimped polyester fibers to heat-bonding conjugated staple fibers is 30:70 to 95:5 and heat-bonded spots are formed at least partially in contact points of both the staple fibers and/or contact points of the mutual heat-bonding conjugated staple fibers.

Crimped polyester fiber and fibrous structure comprising the same

Polyethylene naphthalate fiber

Biaxially oriented film

Biaxially oriented polyethylene naphthalate copolymer film

Film from polycarbonate, polyester to be laminated on metal

High molecular weight polyester fibers having excellent mechanical strength and useful for various industrial materials, is produced by dry-jet wet spinning a dope solution of a polyester resin comprising repeating ethylene terephthalate units, having an intrinsic viscosity of 1.2 or more and dissolved in a phenolic solvent, through a spinneret, coagulating the resultant filamentary dope solution streams in a bath of coagulating liquid in which the phenolic solvent is soluble and the polyester resin is insoluble, while controlling the temperature of the coagulating liquid to a level of from (Tg-50.degree. C.) to (Tg+45.degree. C.) wherein Tg represents a glass transition temperature of the dope solution, and optionally subjecting the resultant undrawn polyester filaments to a rinsing step with a rinsing liquid, to a drawing step at a total draw ratio of at least 5, and to a heat-treating step.

Process for producing high molecular weight polyester fibers

Growing community of inventors

Matsuyama, Japan

Ryoji Tsukamoto