Research activity information

• Jun. 2016 繊維学会, 論文賞


• Jul. 2005 繊維学会関西支部, 関西繊維科学研究奨励賞

• Fouling-resistant superhydrophobic polyketone membranes modified with fluorine-containing silica for water-in-oil emulsion separation

  Keizo Nakagawa, Tomoki Watanabe, Miki Tabuchi, Muhammad Prayogie Aulia, Ralph Rolly Gonzales, Tooru Kitagawa, Yasunao Okamoto, Pengfei Zhang, Atsushi Matsuoka, Eiji Kamio, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Jan. 2025, Journal of Membrane Science, 713, 123309 - 123309

  Scientific journal


• Chitin-augmented wetting resistance and water-in-oil emulsion separation performance of silane-modified polyketone membrane

  Muhammad Prayogie Aulia, Ralph Rolly Gonzales, Miki Tabuchi, Tooru Kitagawa, Yasunao Okamoto, Pengfei Zhang, Nasrul Arahman, Tomohisa Yoshioka, Keizo Nakagawa, Hideto Matsuyama

  Elsevier BV, Oct. 2024, Journal of Membrane Science, 710, 123115 - 123115

  Scientific journal


• Pervaporation dehydration of an isopropanol aqueous solution using microporous TiO2-SiO2-OCL (Organic chelating Ligand) composite membranes prepared under different firing conditions

  Takaya Fujiki, Megumi Kaji, Yuuya Tamamizu, Ryuuki Yasunari, Keizo Nakagawa, Tooru Kitagawa, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama, Tomohisa Yoshioka

  Elsevier BV, Jun. 2024, Separation and Purification Technology, 337, 126249 - 126249

  Scientific journal


• Effect of Surface Modification of Polyamide-Based Reverse Osmosis Membranes by Glycerol Monoacrylate–Butyl Acrylate Copolymers on Antifouling

  Yasuyuki Miyoshi, Yoshitomo Nakata, Tooru Kitagawa, Hideto Matsuyama, Tomohisa Yoshioka, Keizo Nakagawa

  American Chemical Society (ACS), Feb. 2024, Industrial & Engineering Chemistry Research

  Scientific journal


• High-level phenol bioproduction by engineered Pichia pastoris in glycerol fed-batch fermentation using an efficient pertraction system

  Ryota Kumokita, Takahiro Bamba, Hisashi Yasueda, Ayato Tsukida, Keizo Nakagawa, Tooru Kitagawa, Tomohisa Yoshioka, Hideto Matsuyama, Yasuhito Yamamoto, Satoshi Maruyama, Takahiro Hayashi, Akihiko Kondo, Tomohisa Hasunuma

  Elsevier BV, Feb. 2024, Bioresource Technology, 393, 130144 - 130144

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Improvement of anti-wetting and anti-scaling properties in membrane distillation process by a facile fluorine coating method

  Zhan Li, Pengfei Zhang, Yu-Hsuan Chiao, Kecheng Guan, Ralph Rolly Gonzales, Ping Xu, Zhaohuan Mai, Guorong Xu, Mengyang Hu, Tooru Kitagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Nov. 2023, Desalination, 566, 116936 - 116936

  Scientific journal


• The effects of firing temperature and Ti/Si ratio on the H2 permeation characteristics of microporous TiO2-SiO2-organic chelating-ligand composite membranes

  Etsuko Tachi, Tomohisa Yoshioka, Takaya Fujiki, Ryuuki Yasunari, Keizo Nakagawa, Tooru Kitagawa, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

  Elsevier BV, Oct. 2023, Separation and Purification Technology, 322, 124091 - 124091, English

  [Refereed]

  Scientific journal


• AF2400/polyketone composite OSRO membrane for organic solvent mixture separation

  Yusuke Yoshiwaka, Tooru Kitagawa, Takuji Shintani, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Sep. 2023, Separation and Purification Technology, 320, 124150 - 124150, English

  [Refereed]

  Scientific journal


• Organic solvent reverse osmosis characteristics of TiO2-ZrO2-organic chelating ligand (OCL) composite membranes using OCLs with different molecular sizes

  Shunsuke Kitamura, Tomohisa Yoshioka, Keizo Nakagawa, Tooru Kitagawa, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

  Elsevier BV, Jun. 2023, Separation and Purification Technology, 315, 123576 - 123576

  Scientific journal


• Influence of structure of porous polyketone microfiltration membranes on separation of water‐in‐oil emulsions

  Tomoki Watanabe, Keizo Nakagawa, Ralph Rolly Gonzales, Tooru Kitagawa, Atsushi Matsuoka, Eiji Kamio, Tomohisa Yoshioka, Hideto Matsuyama

  Wiley, Mar. 2023, Journal of Applied Polymer Science, 140(22) (22), e53900, English

  [Refereed]

  Scientific journal


• Preparation of Chemically Resistant Cellulose Benzoate Hollow Fiber Membrane via Thermally Induced Phase Separation Method

  Shota Takao, Saeid Rajabzadeh, Masahide Shibata, Chihiro Otsubo, Toyozo Hamada, Noriaki Kato, Keizo Nakagawa, Tooru Kitagawa, Hideto Matsuyama, Tomohisa Yoshioka

  Dec. 2022, MEMBRANES, 12(12) (12), English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Thermal Conductivity of poly-p-phenylene-2,6-benzobisoxazole Film along the In-Plane Axis in the 10–300 K Temperature Range

  Atsuhiko Yamanaka, Yasuko Mito-oka, Susumu Okihara, Tooru Kitagawa

  Informa UK Limited, Sep. 2018, Journal of Macromolecular Science, Part B, 57(9) (9), 595 - 607

  [Refereed]

  Scientific journal


• Difference in Preferential Orientations of Crystal Planes and Crystal Sizes along the Radial Direction of Poly-<i>p</i>-Phenylenebenzobisoxazole (PBO) Fibers

  Tooru Kitagawa

  Society of Fiber Science and Technology Japan, 2018, Journal of Fiber Science and Technology, 74(1) (1), 1 - 9

  [Refereed]

  Scientific journal


• Effects of hydrophilicity of rigid-rod polymers on the formation of poly-p-pyridylenebenzobisoxazole fibers

  Tooru Kitagawa, Nobuyuki Taniguchi, Yukihiro Abe

  Springer Science and Business Media LLC, Apr. 2017, Journal of Materials Science, 52(7) (7), 4142 - 4154

  [Refereed]

  Scientific journal


• Effects of Thermal History in the Fiber Production on Preferential Orientations of Molecular Planes of Rigid-Rod Polymers along the Radial Direction Normal to the Fiber Axis

  Tooru Kitagawa

  Informa UK Limited, Mar. 2017, Journal of Macromolecular Science, Part B, 56(3) (3), 178 - 193

  [Refereed]

  Scientific journal


• Dependence of fiber-structural formation processes for rigid-rod polymers on the miscibility of their molecular chains in poly-phosphoric acid

  Nobuyuki Taniguchi, Yukihiro Abe, Yasuko Mitooka, Tooru Kitagawa

  Corresponding, Elsevier BV, Mar. 2017, European Polymer Journal, 88, 9 - 20

  [Refereed]

  Scientific journal


• Spectroscopic studies of electron spin resonance and Raman scattering on novel hybrid poly-p-phenylenebenzobisoxazole (PBO) fibers with copper phthalocyanine

  Tooru Kitagawa, Yukihiro Abe, Hideki Sugihara, Takeshi Ohazama

  Informa UK Limited, Nov. 2016, Journal of Macromolecular Science, Part A, 53(11) (11), 699 - 708

  [Refereed]

  Scientific journal


• A Novel Composite Poly-p-Phenylenebenzobisoxazole (PBO) Fiber Including Molecularly-Dispersed Copper Phthalocyanine in the Structure

  Tooru Kitagawa, Yukihiro Abe, Kohei Kiriyama

  Informa UK Limited, Aug. 2016, Journal of Macromolecular Science, Part B, 55(8) (8), 774 - 792

  [Refereed]

  Scientific journal


• Nanofiltration Hollow Fiber Membranes Made from Sulfonated Polysulfone having a Cyanophenylene Group

  Tooru Kitagawa

  Corresponding, Lifescience Global, Jul. 2016, Journal of Membrane and Separation Technology, 5(2) (2), 57 - 61

  [Refereed]

  Scientific journal


• Long-term-hydrophilic flat-sheet microfiltration membrane made from chlorinated poly (vinyl chloride)

  Masao Higashi, Junsuke Morita, Norifumi Shimada, Tooru Kitagawa

  Corresponding, Elsevier BV, Feb. 2016, Journal of Membrane Science, 500, 180 - 189

  [Refereed]

  Scientific journal


• Tensile Strength of Poly-p- Phenylene Benzobisoxazole (PBO) Fiber with Kinking Damage

  Noriyo Horikawa, Yuki Kawano, Toshiro Miyajima, Yukihiro Nomura, Tooru Kitagawa, Akira Ueno, Akiyoshi Sakaida, Takao Mori

  2016, Procedia Structural Integrity, 2, 293 - 300, English

  [Refereed]

  Scientific journal


• Morphological studies of poly-p-phenylenebenzobisoxazole (PBO) fibers on the process that determines the direction of the crystal a-axis along the radius direction during the formation of fiber structures

  Tooru Kitagawa, Kenichi Funaki

  Elsevier BV, Jan. 2016, Polymer, 82, 246 - 254

  [Refereed]

  Scientific journal


• Membrane bioreactor pilot machine test for a newly developed membrane fabricated from chlorinated poly (vinyl chloride) and non-woven poly (ethyleneterephthalate) and its anti-fouling properties

  Junsuke Morita, Masao Higashi, Norifumi Shimada, Tooru Kitagawa

  Corresponding, Elsevier BV, Dec. 2015, Journal of Water Process Engineering, 8, 160 - 170

  [Refereed]

  Scientific journal


• Novel Fine Structures in Poly-p-phenylenebenzobisoxazole Fibers Induced by Water Vapor, Hot Water, and Non-Aqueous Coagulation I Molecular Orientation Along the Fiber Axis and Fine Structures

  Tooru Kitagawa

  Informa UK Limited, Nov. 2015, Journal of Macromolecular Science, Part B, 54(11) (11), 1323 - 1340

  [Refereed]

  Scientific journal


• Novel Fine Structures in Poly-p-phenylenebenzobisoxazole Fibers Induced by Water Vapor, Hot Water, and Non-Aqueous Coagulation II Random and Radial Preferential Orientations of the Crystal a-Axis

  Tooru Kitagawa

  Informa UK Limited, Nov. 2015, Journal of Macromolecular Science, Part B, 54(11) (11), 1341 - 1362

  [Refereed]

  Scientific journal


• A Pilot-Plant Test of a Membrane Bioreactor with a Novel Membrane Made from Chlorinated Poly (Vinyl Chloride) (CPVC) and Hydroxy-Propyl Cellulose

  Tooru Kitagawa, Junsuke Morita, Norifumi Shimada, Masao Higashi

  Corresponding, Lifescience Global, Jun. 2015, Journal of Membrane and Separation Technology, 4(2) (2), 74 - 88

  [Refereed]

  Scientific journal


• A Novel Random Preferential Orientation of the Crystal A‐axis Along the Radial Direction Confirmed on the Poly‐<i>p</i>‐phenylenebenzobisoxazole (PBO) Fiber Made with a Water

  Tooru Kitagawa, Kohei Kiriyama, Yusuke Shimizu

  This article concerns PBO fiber structure, especially a preferential orientation of the a‐axis of the PBO crystal in the fiber. It has been reported that the a‐axis of the PBO crystal aligns parallel to the radial direction on the round cross section for PBO AS and HM fibers. This observation was proved by selected‐area electron diffraction and micro‐focus X‐ray diffraction. An application of water vapor coagulation is carried out in this study. It is proved that the fiber so made shows a random orientation of the PBO crystal a‐axis on the cross section. This fact has never been reported on any scientific or engineering journals before as far as the authors have concerned and it becomes state‐of‐the‐art in this study. A mechanism to explain the presence and/or absence of such preference is proposed. The authors believe that the presence of this radial preferential orientation comes from a combination or a balance of polymer‐solvent interaction and the direction of diffusion for solvent from the center to the outside of the fiber.

  Society of Fiber Science and Technology Japan, 2015, Sen'i Gakkaishi, 71(7) (7), 224 - 231, English

  [Refereed]

  Scientific journal


• The Effect of Non-Aqueous Coagulation in the Structure of Poly-<i>p</i>-phenylenebenzobisoxazole (PBO) Fibers

  Tooru Kitagawa, Hideki Sugihara, Masayuki Tsutsumi

  This article concerns surface roughness of PBO fibers. Atomic force microscopy is applied to measuring the surface roughness of the PBO AS, HM and HM+ fibers. Also linear thermal expansion was measured. The reason that the surface roughness is decreased as fiber modulus increases is discussed from the viewpoint of microscopic fiber surface structure. There is a discussion in that the smoothness of fiber surface has relation with fiber modulus, molecular orientation and crystallinity of the fibers. The coefficient of thermal expansion is also measured. The PBO HM+ fiber shows a lower value (-8.7 × 10^-6 K^-1) of coefficient of thermal expansion than that of the PBO HM.

  Society of Fiber Science and Technology Japan, 2015, Sen'i Gakkaishi, 71(2) (2), 105 - 111, Japanese

  [Refereed]

  Scientific journal


• An investigation into the relationship between processing, structure and properties for high-modulus PBO fibres: part 3: analysis of fibre microstructure using transmission electron microscopy

  Tooru Kitagawa, Kazuyuki Yabuki, Andrew C. Wright, Robert. J. Young

  Lead, Springer Science and Business Media LLC, Sep. 2014, Journal of Materials Science, 49(18) (18), 6467 - 6474

  [Refereed]

  Scientific journal


• Fatigue strength behavior of ultraviolet irradiated high-modulus type poly-p-phenylene benzobisoxazole (PBO) fiber

  Noriyo Horikawa, Yukihiro Nomura, Tooru Kitagawa, Yoshio Haruyama, Akiyoshi Sakaida, Takashi Imamichi, Akira Ueno

  2012, Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, 78(788) (788), 411 - 420, Japanese

  International conference proceedings


• Fabrication of Micro-Sized Specimen for Axial Compressive Strength Evaluation of Single Fiber Using UV Lithography and Its Testing Method

  Noriyo HORIKAWA, Yoshio HARUYAMA

  In this paper, a newly developed process to fabricate micro-sized specimen for axial compressive strength evaluation of single fiber using ultraviolet (UV) lithography was proposed. Technique of UV lithography, which was used in semiconductor production, was adopted to fabricate a test specimen that fiber was partially embedded in a photo-polymer. The photo-polymer SU-8 was used as a resist for high aspect ratio test specimen. A PBO fiber, which has excellent characteristics in tensile strength, tensile modulus and chemical resistance, was used as a test fiber material. Direct axial compression test was performed using the micro-compression testing machine with a flat indenter of 50 μm in diameter and two camera units. Finite element analysis was carried out to compute the internal stress distribution in the fiber under compression and to determine the optimum fiber length. The results showed that the proposed specimen fabrication method using UV lithography was demonstrated to be effective for direct measurement of the compressive strengths of PBO fibers. Finite element analysis revealed that the PBO fiber length in the compression test should be at least 20 μm to avoid the influence of fiber rooting in the resin. The experimental values obtained for the compressive strengths of PBO fibers exhibited Weibull distribution with a mean of 217 MPa, which is lower than the values generally obtained by other test methods such as the loop test or resin embedment test.

  Japan Society of Mechanical Engineers, 2012, TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A, 78(793) (793), 1358 - 1365, Japanese

  [Refereed]

  Scientific journal


• Effect of UV Light Irradiation on Tensile Strength of High Modulus Type Poly-p-Phenylene Benzobisoxazole (PBO) Fiber

  Noriyo HORIKAWA, Yoshio HARUYAMA

  The effects of low-intensity UV light irradiation on tensile strength of high-modulus (HM) type poly-p-phenylene benzobisoxazole (PBO) fiber improved tensile modulus by heat-treatment were investigated in a monofilament tensile test. Irradiation time was set to 0 h, 1 h, 10 h, 100 h and 1,000 h, while radiance were arranged to become 2, 4 and 8 W/m². Standard modulus (As spun: AS) type PBO fiber that authors reported its properties before was employed as standard specimen. It was found that the tensile strength distribution of UV irradiated HM type fiber could be approximated to a normal distribution. The relation between tensile strength and radiation time depend on the degree of radiance. However, the relation between tensile strength and radiation dosage was independent of the degree of radiance, and the radiation dosage was most suitable parameter to describe the tensile strength at the different radiance. The tensile strength of HM type fiber was higher than that of AS type fiber over all radiation dosage. It was found by AFM observation that amount of the surface roughness on the UV irradiated HM type fiber with increasing the radiation dosage was smaller than that of the UV irradiated AS fiber. The reason for that poor crystallite orientation region in HM fiber was less than that in AS fiber and an increase in roughness causes autoxidation occur predominantly in the poor crystallite orientation region. Thus the decrease in tensile strength of fibers under UV light irradiation was attributable to not only cutting an internal molecule by the exposure to UV radiation but also the roughness on the surface of the fiber. Effect of roughness on the tensile strength of the UV irradiated HM type fiber was smaller than that of AS type fiber. However, the effect of roughness on the tensile strength of both fibers was not very large.

  Japan Society of Mechanical Engineers, 2012, TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A, 78(790) (790), 865 - 878, Japanese

  [Refereed]

  Scientific journal


• Effect of Strain Rate on the Tensile Strength of High-Modulus Type Poly-<i>p</i>-Phenylene Benzobisoxazole (PBO) Fiber

  Noriyo HORIKAWA, Yoshio HARUYAMA

  In this paper, effect of strain rate on the tensile strength of high-modulus type poly-p-phenylene benzobisoxazole (PBO) fiber was investigated in monofilament tests. Tensile tests were carried out at a gauge length of 12.5 mm. The strain rate ranged from 6.7×10^-4 to 3.2×10^-1 s^-1. It was found that the tensile strength removed size effect in diameter direction of PBO fiber was represented by a two parameter Weibull distribution under all strain rate conditions. The mean tensile strength at high strain rate range from 4.0×10^-2 to 3.2×10^-1 s^-1 was about 8 % higher than that at low strain rate range from 6.7×10^-4 to 1.3×10^-2 s^-1. In addition, it was found by SEM observation that there were distinct differences between fracture surface image of specimen at high strain rate range and at low strain rate range, i.e., the crack length in fiber direction at high strain rate range was much shorter than that at low strain rate range. However the crack grew along boundaries of microfibrils at the low strain rate range, the crack grew not only along the boundaries but also in the microfibrils at the high strain rate range. Therefore, the increase in tensile strength at the high strain rate range was caused by the difference in the path of crack propagation.

  Japan Society of Mechanical Engineers, 2012, TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A, 78(788) (788), 421 - 431, Japanese

  [Refereed]

  Scientific journal


• 延伸ポリエステルフィルムの二重配向と結晶変態に関する研究

  HAYAKAWA Shota, SHIBAYA Miaki, ISHIHARA Hideaki, ITO Katsuya, TAKEGAWA Yoshinori, KITAGAWA Tooru, FUNAKI Kenichi

  Uniaxially stretched poly(ethylene) terephthalate (PET) and poly(butylene) terephthalate (PBT) films made by a roll stretching method have been characterized by wide angle X-ray diffraction and infrared spectroscopy. Wide angle X-ray diffraction photographs were taken from the three directions (through, edge, and end) for each film, and their double orientation was evaluated. The ratios of the α and β crystal forms of PBT were calculated from infrared spectroscopy data. It was confirmed that both, the ratio of the β form crystal increased and the degree of double orientation of PET and PBT increased as the draw ratio increased. The crystals of PET and the β form crystal of PBT show a planar zig-zag conformation of the methylene residue in the benzene ring plane. They take an extremely flat structure. It is concluded that a flat structure parallel to the film surface is the reason for the double orientation of PET and PBT films.
  

  The Society of Polymer Science, Japan, 2009, Kobunshi Kagaku, 66(12) (12), 598 - 604, Japanese

  [Refereed]

  Scientific journal


• Effect of Post Heat Treatment on Tensile Strength of Poly-p-Phenylene Benzobisoxazole (PBO) Fiber

  Noriyo HORIKAWA, Yukihiro NOMURA, Tooru KITAGAWA, Yoshio HARUYAMA, Akiyoshi SAKAIDA, Takashi IMAMICHI, Akira UENO

  Effect of post heat treatment on tensile strength distribution and its size effect of poly-p-phenylene benzobisoxazole (PBO) fiber were investigated in monofilament tests. Two-parameter Weibull distribution adapted for dependence of fiber strength for both length and diameter direction. It was found that the tensile strength of PBO fibers showed size effect regardless of post heat treatment for both length and diameter direction. The size effect of tensile strength in diameter direction was larger than that in longitudinal direction. For relatively long gauge lengths (12.5mm and over), the tensile strength distribution separated size effect in diameter direction well fitted the Weibull distribution function with 2 parameters. For relatively short gauge lengths (under 12.5mm), it did not fit because distribution of fiber strength was lower than that of strength related to end fracture. The size effect of fiber strength for both length and diameter direction was increased by post heat treatment because crystalline regions increased by heat-treatment and fiber became brittleness.

  Japan Society of Mechanical Engineers, 2009, TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A, 75(751) (751), 373 - 380, Japanese

  [Refereed]

  Scientific journal


• Tensile Fracture Behavior of UV Light Irradiated PBO Fiber

  Noriyo HORIKAWA, Yukihiro NOMURA, Tooru KITAGAWA, Yoshio HARUYAMA, Akiyoshi SAKAIDA, Takashi IMAMICHI, Akira UENO, Kazunori NAKAGAWA

  In this paper, tensile strength and behavior of low-intensity UV light irradiated poly-p-phenylene benzobisoxazole (PBO) fiber were investigated in monofilament tests. The tensile tests of a monofilament were carried out at a gauge length of 12.5 mm and deformation rate of 0.5 mm/min. Irradiation time was set to 0h, 1h, 10h, 100h and 1,000h, while radiance was arranged to become 2, 4 and 8 W/m². It was found that the tensile strength distribution of UV irradiated PBO fibers can be approximated to a normal distribution. Regardless of the degree of radiance, the tensile strength tends to decrease gradually with an increase in irradiation time. As radiance intensifies, however, corresponding curved lines move to lower positions, an indication of the dependency of the tensile strength on radiance. The relationship between radiation dosage and tensile strength converges on this one curved line irrespective of the degree of radiance. Therefore radiation dosage should be a valid parameter to measure the degradation of the strength of the PBO fibers exposed to UV light irradiation. In addition, it is found by SEM observation that there are distinct differences between the fracture surface image of UV non-irradiated fiber and that of irradiated fiber. Regardless of UV-irradiation, PBO fibers have split in the direction in which it is set. But the split part in UV-irradiated fiber is shorter than in the UV-non-irradiated fiber because UV-irradiated fiber has split vertically in portions.

  Japan Society of Mechanical Engineers, 2009, Journal of Solid Mechanics and Materials Engineering, 3(1) (1), 1 - 9, English

  [Refereed]

  Scientific journal


• Tensile and fatigue behavior of poly-p-phenylene benzobisoxazole(PBO) fibers

  Noriyo Horikawa, Yukihiro Nomura, Tooru Kitagawa, Yoshio Haruyama, Akiyoshi Sakaida, Takashi Imamichi

  2008, 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, 2, 1546 - 1553, English

  International conference proceedings


• Tensile and Fatigue Strength of High-Modulus Type Poly-p-Phenylene Benzobisoxazole (PBO) Fiber

  Noriyo HORIKAWA, Yukihiro NOMURA, Tooru KITAGAWA, Yoshio HARUYAMA, Akiyoshi SAKAIDA, Takashi IMAMICHI, Shinya SASAKI, Tomonari FUKAYA

  In this paper, tensile and fatigue strength of high-modulus (HM) type (258GPa modulus) poly-p-phenylene benzobisoxazole (PBO) fiber improved tensile modulus by heat-treatment have been investigated. The tensile tests of a monofilament were carried out at a gauge length of 12.5mm and deformation rate of 0.5mm/min. The fatigue tests of a monofilament were carried out to determine the S-N property at a frequency of 10Hz with three stress ratios of 0.1, 0.5 and 0.7. Standard modulus (As spun : AS) type (187GPa modulus) PBO fiber that authors reported its properties before was employed as standard specimen. It was found that the tensile strength of HM type PBO fiber was well represented by a two-parameter Weibull distribution, and indicated a size effect in diameter direction. The tensile strength of HM type PBO fiber on the basis of the concept of effective volume was higher than that of AS type fiber. The fatigue strength of HM type PBO fiber was higher than that of AS type fiber over all fatigue lives. The relation between the stress amplitude and fatigue life depended on the stress ratio. However, the relation between the maximum stress ratio and fatigue life was independent of the stress ratio. Therefore, it was found that the maximum stress was useful to describe the fatigue lives at the different stress ratios. Additionally, the factor governing fatigue fracture tended to vary from the mean stress to stress amplitude at the low stress ratio because crystalline regions increased by heat-treatment and fiber became brittleness.

  Society of Materials Science, Japan, 2008, Journal of the Society of Materials Science, Japan, 57(7) (7), 732 - 738, Japanese

  [Refereed]

  Scientific journal


• The effect of γ-irradiation on thermal strain of high strength polyethylene fiber at low temperature

  Atsuhiko Yamanaka, Yoshinobu Izumi, Tooru Kitagawa, Takaya Terada, Hiroshi Hirahata, Kimiko Ema, Hiroyuki Fujishiro, Shigehiro Nishijima

  Wiley, Oct. 2006, Journal of Applied Polymer Science, 102(1) (1), 204 - 209

  [Refereed]

  Scientific journal


• The radiation effect on thermal conductivity of high strength ultra-high-molecular-weight polyethylene fiber by γ-rays

  Atsuhiko Yamanaka, Yoshinobu Izumi, Tooru Kitagawa, Takaya Terada, Hideki Sugihara, Hiroshi Hirahata, Kimiko Ema, Hiroyuki Fujishiro, Shigehiro Nishijima

  Wiley, Aug. 2006, Journal of Applied Polymer Science, 101(4) (4), 2619 - 2626

  [Refereed]

  Scientific journal


• Radiation effect on the thermal conductivity and diffusivity of ramie fibers in a range of low temperatures by γ rays

  Atsuhiko Yamanaka, Yoshinobu Izumi, Takaya Terada, Kimiko Ema, Masayuki Tsutsumi, Muneatsu Nakamura, Takeshi Oohazama, Tooru Kitagawa, Hiroyuki Fujishiro, Shunzo Abe, Shigehiro Nishijima

  Wiley, Jun. 2006, Journal of Applied Polymer Science, 100(6) (6), 5007 - 5018

  [Refereed]

  Scientific journal


• Thermal conductivity of ramie fiber drawn in water in low temperature

  Atsuhiko Yamanaka, Shunzo Abe, Masayuki Tsutsumi, Tooru Kitagawa, Hiroyuki Fujishiro, Kimiko Ema, Yoshinobu Izumi, Shigehiro Nishijima

  Wiley, May 2006, Journal of Applied Polymer Science, 100(3) (3), 2196 - 2202

  [Refereed]

  Scientific journal


• Effects of vapor-phase-formaldehyde treatments on thermal conductivity and diffusivity of ramie fibers in the range of low temperature

  Atsuhiko Yamanaka, Masatoshi Yoshikawa, Shunzo Abe, Masayuki Tsutsumi, Takeshi Oohazama, Tooru Kitagawa, Hiroyuki Fujishiro, Kimiko Ema, Yoshinobu Izumi, Shigehiro Nishijima

  Wiley, Oct. 2005, Journal of Polymer Science Part B: Polymer Physics, 43(19) (19), 2754 - 2766

  [Refereed]

  Scientific journal


• Thermal conductivity of high strength polyethylene fiber in low temperature

  Atsuhiko Yamanaka, Hiroyuki Fujishiro, Toshihiro Kashima, Tooru Kitagawa, Kimiko Ema, Yoshinobu Izumi, Manabu Ikebe, Shigehiro Nishijima

  Wiley, Jun. 2005, Journal of Polymer Science Part B: Polymer Physics, 43(12) (12), 1495 - 1503

  [Refereed]

  Scientific journal


• Thermal strain of high strength polyethylene fiber in low temperature

  Atsuhiko Yamanaka, Tooru Kitagawa, Masayuki Tsutsumi, Toshihiro Kashima, Hiroyuki Fujishiro, Kimiko Ema, Yoshinobu Izumi, Shigehiro Nishijima

  Wiley, Sep. 2004, Journal of Applied Polymer Science, 93(6) (6), 2918 - 2925

  [Refereed]

  Scientific journal


• Stress distribution in poly-p-phenylenebenzobisoxazole (PBO) fiber estimated from vibrational spectroscopic measurement under tension. II. Analysis of inhomogeneous stress distribution in PBO fiber

  Tooru Kitagawa, Kohji Tashiro, Kazuyuki Yabuki

  Wiley, Jul. 2002, Journal of Polymer Science Part B: Polymer Physics, 40(13) (13), 1281 - 1287

  [Refereed]

  Scientific journal


• Stress distribution in poly-p-phenylenebenzobisoxazole (PBO) fiber as viewed from vibrational spectroscopic measurement under tension. I. Stress-induced frequency shifts of Raman bands and molecular deformation mechanism

  Tooru Kitagawa, Kohji Tashiro, Kazuyuki Yabuki

  Wiley, Jul. 2002, Journal of Polymer Science Part B: Polymer Physics, 40(13) (13), 1269 - 1280

  [Refereed]

  Scientific journal


• An investigation into the relationship between processing, structure, and properties for high-modulus PBO fibers. II. Hysteresis of stress-induced Raman band shifts and peak broadening, and skin-core structure

  Tooru Kitagawa, Kazuyuki Yabuki, Robert J. Young

  Lead, Informa UK Limited, Mar. 2002, Journal of Macromolecular Science, Part B, 41(1) (1), 61 - 76

  [Refereed]

  Scientific journal


• Confirmation of the crystal structure of poly(p-phenylene benzobisoxazole) by the X-ray structure analysis of model compounds and the energy calculation

  Kohji Tashiro, Hisakatsu Hama, Jun-Ichi Yoshino, Yukihiro Abe, Tooru Kitagawa, Kazuyuki Yabuki

  Wiley, Jun. 2001, Journal of Polymer Science Part B: Polymer Physics, 39(12) (12), 1296 - 1311

  [Refereed]

  Scientific journal


• An analysis of capillary water behavior in poly-p-phenylenebenzobisoxazole fiber

  Tooru Kitagawa, Kazuyuki Yabuki

  Wiley, May 2001, Journal of Applied Polymer Science, 80(7) (7), 1030 - 1036

  [Refereed]

  Scientific journal


• An investigation into the relationship between processing, structure and properties for high-modulus PBO fibres. Part 1. Raman band shifts and broadening in tension and compression

  T Kitagawa, K Yabuki, R.J Young

  Lead, Elsevier BV, Mar. 2001, Polymer, 42(5) (5), 2101 - 2112

  [Refereed]

  Scientific journal


• Characterization of structure and properties of polyacrylonitrile-based acrylic fibers

  Bozdogan, F, IsMAIL Karacan, T. Kitagawa

  Dec. 2000, Journal of Materials Science and Technology(Bulgaria)(Bulgaria), 8(3) (3), 119 - 142

  [Refereed]


• A relationship between the stress distribution and the peak profile broadening of meridional X-Ray diffraction from poly-p-phenylenebenzobisoxazole (PBO) fiber

  Tooru Kitagawa, Kazuyuki Yabuki

  Wiley, Nov. 2000, Journal of Polymer Science Part B: Polymer Physics, 38(22) (22), 2937 - 2942

  [Refereed]

  Scientific journal


• An investigation into the relationship between internal stress distribution and a change of poly-p-phenylenebenzobisoxazole (PBO) fiber structure

  Tooru Kitagawa, Kazuyuki Yabuki

  Oct. 2000, Journal of Polymer Science: Polymer Physics, 38(22) (22), 2901 - 2911

  [Refereed]


• An analysis of deformation process on poly-p-phenylenebenzobisoxazole fiber and a structural study of the new high-modulus type PBO HM+ fiber

  Tooru Kitagawa, Michio Ishitobi, Kazuyuki Yabuki

  Wiley, Jun. 2000, Journal of Polymer Science Part B: Polymer Physics, 38(12) (12), 1605 - 1611

  [Refereed]

  Scientific journal


• Crystal Structure and Packing Disorder of Poly(p-phenylenebenzobisoxazole):  Structural Analysis by an Organized Combination of X-ray Imaging Plate System and Computer Simulation Technique

  Kohji Tashiro, Junichi Yoshino, Tooru Kitagawa, Hiroki Murase, Kazuyuki Yabuki

  American Chemical Society (ACS), Aug. 1998, Macromolecules, 31(16) (16), 5430 - 5440

  [Refereed]

  Scientific journal


• Morphological study on poly-p-phenylenebenzobisoxazole (PBO) fiber

  Tooru Kitagawa, Hiroki Murase, Kazuyuki Yabuki

  Wiley, Jan. 1998, Journal of Polymer Science Part B: Polymer Physics, 36(1) (1), 39 - 48

  [Refereed]

  Scientific journal


• 超高弾性率ポリ (p-フェニレンベンゾビスオキサゾール) のX線構造解析とコンピューターシミュレーション

  田代 孝二, 吉野 淳一, 北河 享, 村瀬 浩貴

  The Crystallographic Society of Japan, 1997, 日本結晶学会誌, 39, 44 - 44, Japanese


• Chain Stiffness and Excluded-Volume Effects in Dilute Polymer Solutions. Poly(isophthaloyl-£rans-2,5-dimethylpiperazine)

  Tooru Kitagawa, Jiro Sadanobu, Takashi Norisuye

  Lead, Dec. 1990, Macromolecules, 23, 602 - 607

  [Refereed]


• Phase Equilibrium in Polymer 4- Polymer + Solvent Ternary Systems. 4. Polystyrene 4- Polyisobutylene in Cyclohexane and in Benzene

  Zhen Tong, Yoshiyuki Einaga, Tooru Kitagawa, Hiroshi Fujita

  Dec. 1989, Macromolecules, 22, 450 - 457

  [Refereed]

• Improvement of MBR Treatment Capacity Using Novel CPVC Flat-Sheet Membrane : Result of the Demonstration Test in the Sewage Treatment Plant

  森田純輔, 島田憲史, 東昌男, 北河享

  産業用水調査会, 01 Nov. 2015, 用水と廃水, 57(11) (11), 822 - 828, Japanese

  [Refereed]


• Tensile Strength of Poly-p-Phenylene Benzobisoxazole (PBO) Fiber and its Size Effect

  HORIKAWA Noriyo, NOMURA Yukihiro, KITAGAWA Tooru, HARUYAMA Yoshio, SAKAIDA Akiyoshi, IMAMICHI Takashi, SASAKI Shinya, TAKEKAWA Hideaki

  日本材料強度学会, 29 Oct. 2007, Journal of the Japanese Society for Strength and Fracture of Materials, 41(3) (3), 57 - 65, Japanese


• On the Special Issue of Silk

  TOORU KITAGAWA

  Lead, Society of Fiber Science and Technology Japan, 2007, Sen'i Gakkaishi, 63(8) (8), P.208 - P.208, Japanese


• A Relationship between Structure and Property of PBO Fibers

  Tooru Kitagawa

  Lead, 01 Mar. 2005, 福井大学工学部研究報告, 53(1) (1), 111 - 116


• Improvement of PBO Fiber and Structural Control from Nano-scopic Level

  TOORU KITAGAWA

  Lead, Society of Fiber Science and Technology Japan, 2005, Sen'i Gakkaishi, 61(7) (7), P.178 - P.181, Japanese


• Functionalised plasma polymer coatings for promoting the adhesion of high-performance polymer fibres

  H. Sugihara, T. Kitagawa, F.R. Jones

  Dec. 2004, Polymer Surface Modification: Relevance to Adhesion, 3, 83 - 94


• PBO繊維の構造と物性の関係について

  北河享

  Lead, 高分子刊行会, Dec. 2003, 高分子加工, 52(12) (12), 565 - 569, Japanese


• Structural analysis and deformation process of poly-p-phenylenebenzobisoxazole (PBO) fibers

  Tooru Kitagawa

  Lead, Jul. 2003, Recent Res. Devel. Polym. Sci., 7(2003) (2003), 197 - 221

  [Invited]


• ポリ‐p‐フェニレンベンゾビスオキサゾールの結晶構造の精密化

  田代孝二, 吉野淳一, 北河享, 村瀬浩貴, 矢吹和之

  The Crystallographic Society of Japan, Nov. 1998, 日本結晶学会年会講演要旨集, 1998, 190 - 190, Japanese

• 水とポリマー

  北河 享

  Contributor, 第１章 第３節 水が絡んでできる剛直高分子繊維の結晶配向制御, 技術情報協会, May 2021


• 新訂 最新ポリイミド 基礎と応用

  北河享

  Contributor, 第６章 芳香複素環高分子材料の構造・分子設計, 株式会社エヌ・ティー・エス刊, Dec. 2010


• Fundamentals and manufactured polymer fibres

  Eichhorn, S. J. (Stephen J.), Textile Institute (Manchester, England)

  Contributor, The Structure of High-modulus, High-tenacity Poly-p-phenylenebenzobisoxazole) Fibres, Woodhead Pub., Nov. 2009, English, ISBN: 9781845693800


• レオロジーデータハンドブック

  日本レオロジー学会

  Contributor, 4.2.4 PBO繊維, 丸善, Jan. 2006, Japanese, ISBN: 4621076787


• Encyclopedia of materials : science and technology

  Buschow, K. H. J.

  Contributor, p. 7276-7280 Polymer Fiber Processing: High-performance Fibers, Elsevier, 2001, English, ISBN: 0080431526

• Preferential Orientations of Molecular Planes of Rigid-Rod Polymers along the Radial Direction Normal to the Fiber Axis

  Tooru Kitagawa

  International Congress on Advanced Materials Sciences and Engineering 2019, Jul. 2019

  [Invited]


• Preferential Orientations of Molecular Planes of Rigid-Rod Polymers along the Radial Direction Normal to the Fiber Axis

  北河 享

  第１３回中日先端芳香族高分子研討会, Nov. 2018


• Preferential Orientations of Molecular Planes of Rigid-Rod Polymers along the Radial Direction Normal to the Fiber Axis

  Tooru Kitagawa

  CCMR 2018, Aug. 2018

  [Invited]


• 水が絡んでできる繊維中での剛直高分子の結晶軸配向決定

  フロンティアソフトマター開発専用ビームライン産学連合体 第6回 研究発表会, Jan. 2017


• 剛直性高分子が形作る微細構造の形態について ‐PBO 繊維の例‐

  北河 享

  第２１回 日本ポリイミド・芳香族系高分子会議, Dec. 2013

  [Invited]


• Structure and Properties of PBO Fibre

  Tooru Kitagawa

  Polymer Fibres 2010, Jul. 2010

  [Invited]


• PBO繊維の構造と物性 ー途中の構造の解析ー

  北河享

  第５９回高分子学会年次大会, May 2010

  [Invited]


• ナノ構造制御によるスーパー繊維の高性能化

  北河 享

  第２９回関西繊維科学講座, Dec. 2004

  [Invited]


• A relationship between structure and property of PBO fiber

  Tooru Kitagawa

  The 33rd Textile Research Symposium at Mt. Fuji (2004), Aug. 2004

  [Invited]


• Structural analysis of PBO fibers using Raman spectroscopic methods

  Tooru Kitagawa

  Polymer Fibres 2004, Jul. 2004

  [Invited]


• Stress distribution in PBO fiber as viewed from vibrational spectroscopic measurement under tension

  Tooru Kitagawa, Kohji Tashiro, Kazuyuki Yabuki

  The Fiber Society, Annual Conference, Fall 2003, Oct. 2003

  [Invited]


• PBO繊維の構造と物性について

  北河 享

  第５２回高分子学会年次大会, May 2003

  [Invited]


• Stress distribution in PBO fibrers as viwed from vibrational spectroscopic measuremant under tension

  Tooru Kitagawa, Kohji Tashiro, Kazuyuki Yabuki

  Polymer Fibres 2002, Jul. 2002

  [Invited]


• ポリ-p-フェニレンベンゾビスオキサゾール(PBO)繊維の構造と力学変形機構について

  北河 享

  第３８回 化学関連支部合同九州大会, Jul. 2001

  [Invited]

• 日本膜学会

  Apr. 2022 - Present


• 化学工学会

• 東洋紡（上海）投資有限公司 Wechat 企業アカウント

  Jan. 2021

• ポリベンザゾール繊維の乾燥方法

  一柳 隆治, 村瀬 浩貴, 北河 享, ジャン ハイ イム, チー チュン チャウ

  特願平5-304111, 特許03065467

  Patent right


• ポリベンザゾール繊維の製造方法

  寺本 喜彦, 北河 享, 石飛 三千夫

  特願平7-235208, 特許03661802

  Patent right


• 高弾性率ポリベンザゾール繊維及びその製造法

  北河 享, 石飛 三千夫

  特願平9-161554, 特許03801734

  Patent right


• 高弾性率ポリベンザゾール繊維及びその製造法

  北河 享, 石飛 三千夫

  特願平9-280789, 特許04009885

  Patent right


• 高強度ポリエチレン繊維

  阪本 悟堂, 北河 享, 小田 勝二, 大田 康雄

  特願2000-387652, 特許04478853

  Patent right


• ポリベンザゾール繊維

  北河 享, 杉原 秀紀

  特願2001-587, 特許03770375

  Patent right


• ポリベンザゾール繊維

  北河 享, 坂口 佳充, 加地 篤

  特願2001-588, 特許03815596

  Patent right


• プリプレグ、複合材料及び積層体

  北河 享

  特願2001-248268, 特許04243923

  Patent right


• 織物

  北河 享

  特願2001-250688, 特許04164731

  Patent right


• 高強度ポリエチレン繊維

  北河 享, 阪本 悟堂, 小田 勝二, 寺本 喜彦, 大田 康雄

  特願2001-253449, 特許03832631

  Patent right


• ポリベンザゾール繊維

  北河 享

  特願2001-315784, 特許03852681

  Patent right


• ポリベンザゾール繊維及びその製造方法

  北河 享, 児玉 哲夫

  特願2001-376006, 特許03918989

  Patent right


• ポリベンザゾール繊維およびその製造方法

  奥山 幸成, 一柳 隆治, 杉原 秀紀, 北河 享

  特願2002-18787, 特許03912586

  Patent right


• 産業資材用制電ポリベンザゾール組成物

  北河 享, 中村 宗敦, 阿部 幸浩

  特願2002-32738, 特許04524060

  Patent right


• 細径電線コード

  北河 享, 阿部 幸治, 大田 康雄

  特願2002-106893, 特許03978653

  Patent right


• ポリベンザゾ－ルポリマー成形体

  杉原 秀紀, 北河 享, 渡抜 政治

  特願2002-227733, 特許04403485

  Patent right


• ポリフェニレンサルファイド繊維及び高ろ過性バグフィルタ－用ろ布

  北河 享, 末岐 和史, 杉山 博文

  特願2003-412680, 特許04359830

  Patent right


• ポリエステルフィルム

  伊藤 勝也, 向山 幸伸, 北河 享, 清水 祐輔

  特願2004-240643, 特許04543313

  Patent right


• 高強度ポリエチレンマルチフィラメント

  北河 享, 小寺 賢, 篭島 靖, 阪本 悟堂, 福島 靖憲

  特願2004-310746, 特許04565324

  Patent right


• 高強度ポリエチレンマルチフィラメント

  阪本 悟堂, 福島 靖憲, 村瀬 浩貴, 大田 康雄, 北河 享

  特願2004-310747, 特許04565325

  Patent right


• 共重合ポリベンザゾール繊維

  谷口 信志, 北河 享, 阿部 幸浩, 水戸岡 靖子, 霧山 晃平, 村瀬 浩貴

  特願2004-370680, 特許04433299

  Patent right


• ポリベンザゾール系ポリマー及びそれを用いた繊維

  阿部 幸浩, 水戸岡 靖子, 北河 享, 谷口 信志, 久保田 冬彦

  特願2004-371279, 特許04381295

  Patent right


• 高強度ポリエチレン繊維の製造方法

  福島 靖憲, 阪本 悟堂, 北河 享, 村瀬 浩貴, 大田 康雄

  特願2005-155801, 特許04524644

  Patent right


• ポリイミドフィルム

  堤 正幸, 北河 享, 東 昌男, 前田 郷司, 河原 恵造, 高橋 則子, 矢吹 寛子

  特願2006-201638, 特許05040205

  Patent right


• ポリイミドフィルム

  堤 正幸, 北河 享, 東 昌男, 前田 郷司, 河原 恵造, 高橋 則子, 矢吹 寛子

  特願2006-201639, 特許04967495

  Patent right


• ポリイミドフィルム

  堤 正幸, 北河 享, 東 昌男, 前田 郷司, 河原 恵造, 高橋 則子, 矢吹 寛子

  特願2006-201640, 特許04967496

  Patent right


• ポリベンザゾール繊維

  北河 享, 霧山 晃平, 渡抜 政治, 寺本 喜彦, 清水 祐輔

  特願2006-226430, 特許04929921

  Patent right


• ポリベンザゾール繊維の製造方法及びポリベンザゾール繊維

  霧山 晃平, 北河 享, 渡抜 政治, 寺本 喜彦

  特願2006-226431, 特許04929922

  Patent right


• 表面改質繊維を用いたプリプレグ

  橋本 香菜, 福島 靖憲, 北河 享

  特願2009-110409, 特許05332879

  Patent right


• 表面改質繊維及びその製造方法

  橋本 香菜, 福島 靖憲, 北河 享

  特願2009-554821, 特許05671798

  Patent right


• ポリイミドフィルム

  堤 正幸, 北河 享, 東 昌男, 前田 郷司, 河原 恵造, 高橋 則子, 矢吹 寛子

  特願2012-105760, 特許05477418

  Patent right


• かん水淡水化用の逆浸透膜

  東 昌男, 森田 純輔, 北河 享

  特願2012-137711, 特許05896294

  Patent right


• ナノろ過用の分離膜

  東 昌男, 森田 純輔, 北河 享

  特願2012-139549, 特許05896295

  Patent right


• 高分子多孔質平膜シート

  森田 純輔, 東 昌男, 田路 亜妃菜, 島田 憲史, 北河 享

  特願2013-10823, 特許05424145

  Patent right


• 廃水処理用平膜カートリッジ

  島田 憲史, 森田 純輔, 北河 享, 東 昌男

  特願2013-224827, 特許05742041

  Patent right


• 排水処理用の逆浸透膜

  東 昌男, 森田 純輔, 北河 享

  特願2013-506393, 特許05252333

  Patent right


• ＭＢＲ用高分子多孔質平膜シート

  森田 純輔, 東 昌男, 北河 享, 島田 憲史, 岩嵜 真志

  特願2014-8352, 特許05569832

  Patent right


• ポリフッ化ビニリデン製高分子多孔質平膜シート

  北河 享, 森田 純輔, 東 昌男, 島田 憲史

  特願2014-30303, 特許05655963

  Patent right


• 限外ろ過用中空糸膜

  東 昌男, 森田 純輔, 北河 享, 島田 憲史

  特願2014-164167, 特許06303910

  Patent right


• 複合分離膜

  中尾 崇人, 大亀 敬史, 山根 遼平, 渡抜 政治, 北河 享

  特願2014-552062, 特許06256705

  Patent right


• 分離膜および分離膜エレメントおよび分離膜モジュール

  中尾 崇人, 明石 真由美, 八尾 美佑紀, 渡抜 政治, 北河 享

  特願2016-553115, 特許06620754

  Patent right


• 浸漬型中空糸膜モジュール、および、それを用いる正浸透水処理方法

  中尾 崇人, 檜垣 綾乃, 東 昌男, 北河 享

  特願2017-520638, 特許06477872

  Patent right


• 膜カートリッジの再生方法

  北河 享, 森田 純輔, 東昌 男, 島田 憲史, 檜垣 綾乃

  特願2017-529944, 特許06791142

  Patent right


• ポリエステル系繊維の製造法

  飯塚 憲央, 作田 光浩, 矢吹 和之, 石原 英昭, 坂口 佳充, 北河 享

  特願平3-217840, 特許03024657

  Patent right


• ポリエステル系繊維の製造方法

  作田 光浩, 矢吹 和之, 石原 英昭, 坂口 佳充, 北河 享

  特願平2-103715, 特許03038779

  Patent right