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Matsumoto M.,Nihon University | Matsumoto Y.-I.,Shinshu University | Kanai H.,Shinshu University | Wakako L.,Kanazawa University | Fukushima K.,Daiwabo Neu Co.
Textile Research Journal | Year: 2014

In order to diversify the structure of spun yarn as textile material and to develop novel composite spun yarn with good functionality, we investigated how to construct single yarn with a twin staple-core and sheath structure and/or adopt the production method of triplet spun yarn using an experimental ring spinning frame. Fundamentally, the unique spinning conditions were not only the arrangement and the distances of three rovings and the twist level of yarn, but also the types of staple fibers.The following results were obtained: (1) by adopting the production method of triplet spun yarn with three rovings under the spinning condition with two differing roving distances, the yarn combining side-by-side and sheath-core structures could be constructed by two points of yarn formation and one twisting process without the device for controlling of spinning tension; (2) in the spinning method of twin staple-core spun yarn, it was necessary to control the difference between spinning tensions of the sheath layer and the twin staple-core layer with side-by-side structure under the spinning condition with the lower twist level of yarn and the greater difference between two roving distances; (3) for combining the twin staple-core and the sheath layers, it was important not only to control the greater length of drafted fiber strands for the sheath layer, but also to choose the cut length of the sheath and the core fibers. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

Matsumoto Y.-I.,Shinshu University | Kanai H.,Shinshu University | Morooka H.,Shinshu University | Kimura H.,Osaka Institute of Technology | Fukushima K.,Daiwabo Neu Co.
Textile Research Journal | Year: 2010

In order to design and develop novelspun yarns with good functionality, we investigated how to construct a core-sheath structure adapted from a multilayered structure of triplet-spun yarn and/or made from a twin-spun yarn with core-staple fibers using an experimental ring-spinning frame. The results were follows: (1) staple-core twin-spun yarn, a new yarn, could be made by applying the production method of triplet-spun yarn and/or combining the production methods of core-spun yarn and twin-spun yarn into one twisting process; (2) by adopting three rovings made from fibers of differing length and fineness, the resulting triplet-spun yarn had the core-sheath structure within an adequate spinning condition; (3) for the construction of coresheath structure, it is important that there be a difference between spinning tensions at the center and the two sides of the drafted fiber strands or drafted strand lengths from the front roller nip to the point of yarn formation by controlling the distance of the supply rovings and the yarn's twist factor. © The Author(s), 2010.

Mizutani C.,Otsuma Womens University | Yahata A.,Shinshu University | Tsuiki H.,Daiwabo Neu Co. | Morikawa H.,Shinshu University | And 6 more authors.
Sen'i Gakkaishi | Year: 2013

Most of the elderly patients confined to bed suffer from the case of contracted hands and are unable to open their hands freely. Since they grasp the hands tightly all the time, the contracted hands generate foul smell like degraded aliphatic acid products and also cause the skin disease such as athlete's foot by Trichophyton. In the hospital, a rod-like tool made of soft fabric is conventionally applied to the palms of those patients to prevent from injuring the palm skin, but it does not help to suppress a foul smell generation due to an unhealthy condition of the skin. In order to solve this problem and improve the patient room environment, we applied a deodorant as well as antibacterial cotton fabric processed with iron (III) tetracarboxyphthalocyanine-processed and cupper (II) tetraammine. Iron (III) tetracarboxyphthalocyanine is known as an artificial oxidase-like enzyme, and cupper (II) tetraammine functions synergistically with this artificial enzyme to suppress foul smell and bacteria growth. The clinical test confirmed that foul smell from contracted hands was reduced to "very weak" by applying a hand grip made of new processed cotton fabrics after 4 days. The diseased skin (typically observed between fingers and palm) exhibited a symptom of recovery to its healthy sate after 3 or 4 days, and most of the athlete's foot symptom disappeared after 1 week.

Daiwabo Holdings Co., Daiwabo Neu Co. and Iforet Co. | Date: 2011-09-29

A highly moisturizing cosmetic composition having firmness/elasticity-improving effect, wrinkle-improving effect, and texture-improving effect can be provided by blending a metal phthalocyanine derivative or salt thereof in a cosmetic material. For the metal phthalocyanine derivative, iron phthalocyanine tetracarboxylic acid is particularly favorable.

Yamada M.,Japanese National Institute for Occupational Safety and Health | Yamada M.,Kanazawa University | Nakamura K.,Kanazawa University | Kameda T.,Kanazawa University | And 6 more authors.
Chemical and Pharmaceutical Bulletin | Year: 2015

Polycyclic aromatic hydrocarbons (PAHs) are known as carcinogenic and/or mutagenic substances, and are present at high concentration in polluted environments. It has recently been reported that spore-forming bacteria (e.g., Bacillus spp.) can be transported long distances alive in the atmosphere, which raises the possibility that some of the transported bacteria could have adverse effects on human health. There is thus a need for filters that can remove gaseous PAHs from the air that people breathe and that can inhibit bacterial growth on the filters. We focused on metallophthalocyanine derivatives (M-Pc) which are known to adsorb PAHs as well as to inhibit the growth of bacteria as a potential filtering agent. In this study, we developed different types of M-Pc-supported rayon fibers by changing central metals, functional groups, concentrations of M-Pc and rayon types, and evaluated their removal effects by measuring adsorption rates of 3- and 4-ring PAHs with a HPLC and growth curves of Bacillus sp. with a spectrophotometer. The results showed that both the effects depended on functional groups and concentrations of M-Pc, and rayon types. The most effective combination was observed in Fe-Pc with sulfo group supported on cationized rayon fiber at the concentration of 2 to 3.3 wt%. Central metal species of M-Pc were influenced only on the antibacterial properties. This fiber would be applicable to filtering agents and textiles. © 2015 The Pharmaceutical Society of Japan.

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