Taiyo Kogyo Corporation

Japan

Taiyo Kogyo Corporation

Japan
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A culture vent plug, a lid body kit, and a frame body for the culture vent plug are provided having a configuration which prevents air permeability from lowering when a vessel opening portion is blocked and excellent in cleanability and sterilizability. A vent plug body capable of securing ventilation between inside and outside a culture vessel; and a frame body including a holding portion holding the vent plug body, and an attachment portion capable of being attached to and detached from a vessel opening of the culture vessel are included, and the vent plug body is held by the holding portion so as to be capable of being repeatedly attached to and detached from the frame body.


Kumagai S.,Tohoku University | Hirahashi S.,Tohoku University | Grause G.,Tohoku University | Kameda T.,Tohoku University | And 2 more authors.
Journal of Material Cycles and Waste Management | Year: 2017

Polyvinyl chloride (PVC)-coated poly(ethylene terephthalate) (PET) woven fibers are one of the hardest-to-recycle polymeric materials. Herein we investigate the possibility of recycling both PVC and PET through alkaline hydrolysis of PET. The coated woven fabrics were treated with NaOH, hydrolyzing the PET fibers into water-soluble sodium terephthalate, while the PVC could be removed by filtration. The PET fibers were completely hydrolyzed between 120 and 180 °C in the presence of 1 M NaOH solution, quantitatively yielding terephthalic acid. A minimum PVC dechlorination rate of 1% was simultaneously achieved at 120 °C. Furthermore, no alkaline hydrolysis of the plasticizer contained in the PVC, di(2-ethylhexyl)phthalate, was observed. Thus, the possibility of simultaneously recycling PET and PVC from PVC-coated woven fabrics was demonstrated. Kinetic analyses of PET hydrolysis and PVC dechlorination revealed that the simultaneously occurring reaction processes did not affect the progress of each other. Thus, the absence of interactions between PET, PVC, or their degradation products enables the design of a simplified recycling process without considering the interactions between the materials derived from coated woven fabrics. © 2017 Springer Japan


Masuo T.,Taiyo Kogyo Corporation | Ishida M.,Taiyo Kogyo Corporation | Nishimura M.,Osaka Institute of Technology | Akai T.,Osaka Institute of Technology
15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015: New Innovations and Sustainability | Year: 2015

We have developed gas-permeable/waterproof sheet (GPWS), comprising a micro-porous sheet which is waterproof and have gas permeability, coated with nonwovens to protect and reinforce it, and carried out many experiments in both laboratories and fields. GPWS has been applied as cover sheet for temporary storage sites of decontamination waste due to the Fukushima nuclear accident. On the other hand, geomembrane which is waterproof but gas-impermeable has also employed as cover sheet of the decontamination waste in conjunction with gas-vent pipes. In this study, temperature and oxygen-concentration of the decontaminated wastes, over which GPWS and geomembrane were installed respectively, were experimentally measured in real temporary storage site to compare the influence of weather condition. As the results, it was demonstrated that GPWS can achieve sufficient performances as the cover sheet in that both temperature and oxygen-concentration, closely relating with the consistency of gas permeability in the cover system, was less influenced by weather condition.


Ishida M.,TaiyoKogyo Co. | Katsumi T.,Kyoto University
9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010 | Year: 2010

This paper presents the installation techniques of geosynthetic bamers into coastal landfills that have been adopted in the recent construction projects in Japan. The installation procedures mainly consist of enlargement works of geomembrane sheet units in the yard and on the sea, and submergence and placement of the enlarged sheet units to the sea base. The paper also describes the structural features and related environmental conditions of coastal landfills. In addition some technical issues are discussed in relation to development of new geomembranes to solve problems that are peculiar to coastal landfills.


Ohsaki M.,Hiroshima University | Nakajima T.,Kyoto University | Fujiwara J.,Taiyo Kogyo Corporation | Takeda F.,Taiyo Kogyo Corporation
Engineering Structures | Year: 2011

A method is presented for configuration optimization of frames that have specified properties on nodal displacements, stresses, and reaction forces against static loads. The conventional ground structure approach is first used for topology optimization. A feasible solution with a small number of members satisfying all the design requirements except the stress constraints is obtained by assigning artificially small upper-bound displacement, or by penalizing the stiffness of a thin member. This way, the well-known difficulty in topology optimization under stress constraints is successfully avoided. The nodal locations and cross-sectional areas of the feasible solution are next optimized to obtain an approximate optimal configuration under stress constraints. The proposed method is applied to the design of self-fastening clamping members for membrane structures modeled using frame elements. An optimization result is also presented for a clamping member that adjusts deformation of membrane by applying a clamping force with a vertically attached bolt. © 2011 Elsevier Ltd.


Patent
Hitachi Zosen Corporation and Taiyo Kogyo Corporation | Date: 2015-09-16

Presented is an exterior wall, which surrounds the periphery of a stack, that can be designed by giving consideration to the environment, that can be constructed in a short time, and that can have a complex geometric shape that enhances the design. An exterior side of first steel members (2) that are arranged around the stack (1) to support the stack (1), or second steel members (6) that are arranged on the first steel members (2), is surrounded with a membrane member (5). An exterior edge that is an exterior edge of the membrane member (5) and, if required, an appropriate position of the membrane member other than the exterior edge is fixed. Because of the use of the membrane member that is lightweight, the foundation work can be reduced. Moreover, because the steel members that support the stack also serve as the support members that support the membrane members, the construction period can be drastically shortened, and the construction cost can be drastically reduced. Moreover, because the construction work can be carried out from inside, a scaffold becomes unnecessary, and therefore, the construction period can be further shortened, and the construction cost can be further reduced.


Toyoda H.,Taiyo Kogyo Corporation
Fabric Architecture | Year: 2012

Both poly tetrafluoroethy lene(PTFE)-and polyvinyl chloride(PV C)-coated fabrics are employed today in differenttype of tents and architectural membrane structures all over the world. However, there is no easy and effective recycling method for these fabrics because of the difficulty of separation of the fibers from the coating resins. From the environmental viewpoint, Taiyo Kogyo has succeeded in developing Kenafine™ that is a green fabric for architectural membrane structures made by weaving kenaf bast fiber with poly ester fiber as a base fabric. Kenafine™ can be easily recy cled to produce paper products.


Tovoda H.,Taiyo Kogyo Corporation
8th Asian-Australasian Conference on Composite Materials 2012, ACCM 2012 - Composites: Enabling Tomorrow's Industry Today | Year: 2012

Both polytetrafluoroethylene(PTFE)-and polyvinyl chloride(PVC)-coated fabrics are employed today in different type of tents and architectural membrane structures all over the world. However, there is no easy and effective recycling method for these fabrics because of the difficulty of separation of the fibers from the coating resins. From the environmental viewpoint, Taiyo Kogyo has succeeded in developing Kenafine™ that is a green fabric for architectural membrane structures made by weaving kenaf bast fiber with polyester fiber as a base fabric. Kenafine™ can be easily recycled to produce paper products. The fabric is a multi-functional coated one which has recyclable, self-cleaning effect and an antibacterial activity. Copyright © (2012) by Asian-Australasian Association for Composite Materials (AACM).


Patent
Taiyo Kogyo Corporation and Nagoya University | Date: 2010-01-21

A membrane tension measuring apparatus comprises: a rectangular frame (5) adapted to be abuttable on a surface (4) of a membrane (2) to which tension (Tx, Ty) is applied; an acoustic wave generator (17) operable to emit an acoustic wave (16) toward a part (2a) of the membrane (2) surrounded by the frame (5); a vibration detector (24) operable to detect vibration which is induced in the part (2a) of the membrane (2) by the emitted acoustic wave (16); and a processor (29) operable to calculate the tension (Tx, Ty) based on vibration data detected by the vibration detector (24). Each of the acoustic wave generator (17), the vibration detector (24) and the processor (29) is mounted to the frame (5).


Trademark
Taiyo Kogyo Corporation | Date: 2013-05-30

Insulating water proofing membranes; weatherizing membranes, plastic sheets for construction and general use; plastics in the form of sheets. Roofing membranes; waterproofing membranes for roofing, floors and walls; fabrics for use in civil engineering; geotextiles for the purposes of drainage, stabilizing inclines, recultivation, plant support, absorption, filtration, separation, stabilization, and reinforcement of the soil; geotextiles, namely, fabric and sheeting for water shielding in landfills; geotextiles for use in connection with road construction, railroad construction, tunnel construction, waterway construction, and public works construction; geomembranes for the purposes of drainage, stabilizing inclines, recultivation, plant support, absorption, filtration, separation, stabilization, and reinforcement of the soil; geomembranes, namely, fabric and sheeting for water shielding in landfills; geomembranes for use in connection with road construction, railroad construction, tunnel construction, waterway construction, and public works construction. Awnings not of metal; tarpaulins; synthetic fibers for textile use. Synthetic fiber fabrics.

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