Pub Date : 2001-06-25DOI: 10.4188/TRANSJTMSJ.56.11_T95
Kousuke Sugimoto, N. Mori, K. Chiba
The objective of this study is to well understand the interaction between the configuration of flexible fibers and flow kinematics in fiber suspension flows. In this framework, the evolution of the configuration of a single fiber in a simple shear flow at low Reynolds number was numerically analyzed on the basis of an 'immersed boundary method' developed by Peskin. In the computations fibers with force-free configuration of being straight were used. While deformation of a fiber is fundamentally three-dimensional, stretching/compression and bending deformations in the plane of flow were simply assumed.In Part 2 of the series of papers, the effects of fluid viscosity and shear rate on the evolution of the configuration of a single fiber and flow kinematics were described. The behavior of a fiber becomes more complex as the fluid viscosity increases. Furthermore, it was confirmed that a flow-induced bending parameter, which is a function of fiber length, bending stiffness, fluid viscosity and shear rate, is a useful dimensionless parameter for classification of rotation of an elastic fiber, such as rigid rotation, springy rotation, S-turn, snake turn and complex rotation.
{"title":"Motion of Flexible Fibers in a Newtonian Flow: Evolution of Configuration of Multiple Fibers and Flow Kinematics in a Simple Shear Flow","authors":"Kousuke Sugimoto, N. Mori, K. Chiba","doi":"10.4188/TRANSJTMSJ.56.11_T95","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.56.11_T95","url":null,"abstract":"The objective of this study is to well understand the interaction between the configuration of flexible fibers and flow kinematics in fiber suspension flows. In this framework, the evolution of the configuration of a single fiber in a simple shear flow at low Reynolds number was numerically analyzed on the basis of an 'immersed boundary method' developed by Peskin. In the computations fibers with force-free configuration of being straight were used. While deformation of a fiber is fundamentally three-dimensional, stretching/compression and bending deformations in the plane of flow were simply assumed.In Part 2 of the series of papers, the effects of fluid viscosity and shear rate on the evolution of the configuration of a single fiber and flow kinematics were described. The behavior of a fiber becomes more complex as the fluid viscosity increases. Furthermore, it was confirmed that a flow-induced bending parameter, which is a function of fiber length, bending stiffness, fluid viscosity and shear rate, is a useful dimensionless parameter for classification of rotation of an elastic fiber, such as rigid rotation, springy rotation, S-turn, snake turn and complex rotation.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126009759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-05-25DOI: 10.4188/TRANSJTMSJ.54.5_T83
Satoru Tanaka, Takehiro Yamamoto, K. Nakamura
The flow rate balance of viscoelastic fluids through a branching channel with two exits, which were different in width, was studied. Numerical simulations of the viscoelastic flow in branching channels were carried out by the stream-upwind finite element method. The Gie sekus model with a single relaxation time was used for a constitutive equation. The Bird carreau model which was one of generalized Newtonian models was also used in order to separate the contribution of elasticity. The shear-thinning property in viscosity causes the in crease in the ratio of the flow rate in the wider slit to the total flow rate with increasing flow rate. Furthermore, the stretch-thickening property in elongational viscosity promotes the ten dency. Therefore, for viscoelastic fluids, both the shear viscosity and the elongational viscos ity affect the flow rate balance.
{"title":"Ratio of Outflow Rate of Viscoelastic Fluids through a Branching Channel","authors":"Satoru Tanaka, Takehiro Yamamoto, K. Nakamura","doi":"10.4188/TRANSJTMSJ.54.5_T83","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.5_T83","url":null,"abstract":"The flow rate balance of viscoelastic fluids through a branching channel with two exits, which were different in width, was studied. Numerical simulations of the viscoelastic flow in branching channels were carried out by the stream-upwind finite element method. The Gie sekus model with a single relaxation time was used for a constitutive equation. The Bird carreau model which was one of generalized Newtonian models was also used in order to separate the contribution of elasticity. The shear-thinning property in viscosity causes the in crease in the ratio of the flow rate in the wider slit to the total flow rate with increasing flow rate. Furthermore, the stretch-thickening property in elongational viscosity promotes the ten dency. Therefore, for viscoelastic fluids, both the shear viscosity and the elongational viscos ity affect the flow rate balance.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115950560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-05-25DOI: 10.4188/TRANSJTMSJ.54.5_T89
M. Mitsuhashi, K. Nishimura, K. Nomura, Takehiro Yamamoto, N. Mori, K. Nakamura
In the polymer processing, weld-lines often occur and cause the degradation of the mechanical and optical properties of products. These properties are degraded when the polymer molecules near the weld-line highly orient owing to the elongational flow and the orientation is fixed by solidification of the polymer melts before it returns to a random condition. In the present paper, the viscoelastic welding flow was numerically calculated for analyzing the molecular orientation in the weld-line region. The numerical simulation of the flow around a spider supporting a mandrel was carried out using the single-mode Giesekus model as a constitutive equation. The effects of the spider shape and viscoelastic properties of polymer melts on the anisotropy of the molecular orientation at the weld-line were analyzed. The calculation was carried out for three spider shapes, i.e. the spider-rear-end-angleθ2=30°, 45°, and 60°, The numerical results showed a simple modification of θ2suppressed the elongational rate, the stress, and the maximum value of the degree of the molecular orientation near the spider rear end, where the weld-line occurred. When the Weissenberg number is large and the influence of shear-thinning is great, the maximum value of the elongational rate was sensitive to θ2Especially at large Weissenberg number (=2.4), the elongational stress was reduced more effectively using the spider of the case that θ2=60°.
{"title":"Numerical Analysis of Viscoelastic Welding Flow","authors":"M. Mitsuhashi, K. Nishimura, K. Nomura, Takehiro Yamamoto, N. Mori, K. Nakamura","doi":"10.4188/TRANSJTMSJ.54.5_T89","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.5_T89","url":null,"abstract":"In the polymer processing, weld-lines often occur and cause the degradation of the mechanical and optical properties of products. These properties are degraded when the polymer molecules near the weld-line highly orient owing to the elongational flow and the orientation is fixed by solidification of the polymer melts before it returns to a random condition. In the present paper, the viscoelastic welding flow was numerically calculated for analyzing the molecular orientation in the weld-line region. The numerical simulation of the flow around a spider supporting a mandrel was carried out using the single-mode Giesekus model as a constitutive equation. The effects of the spider shape and viscoelastic properties of polymer melts on the anisotropy of the molecular orientation at the weld-line were analyzed. The calculation was carried out for three spider shapes, i.e. the spider-rear-end-angleθ2=30°, 45°, and 60°, The numerical results showed a simple modification of θ2suppressed the elongational rate, the stress, and the maximum value of the degree of the molecular orientation near the spider rear end, where the weld-line occurred. When the Weissenberg number is large and the influence of shear-thinning is great, the maximum value of the elongational rate was sensitive to θ2Especially at large Weissenberg number (=2.4), the elongational stress was reduced more effectively using the spider of the case that θ2=60°.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127980650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-04-25DOI: 10.4188/TRANSJTMSJ.54.4_T65
Miyuki Nakahashi, Harumi Morooka, C. Nakajima, Seizo Satoh, H. Morooka
This paper aims to clarify wear performance of trial support pantyhose of which front pressure was lower by being controlled loop length in course direction.Experiments for examining effects of trial pantyhose on swelling of lower legs, fatigue (Reaction time (RI), Flicker value (FV)), compressive feeling and comfort were made.As subjects, thirty-three women working in a department store were employed.The results obtained were as follows : 1) When the mean clothing pressure of pantyhose is higher, the swelling of lower legs (Sw) became smaller significantly.In a case of Sw>0, the trial pantyhose were more effective than the pantyhose on the market.2) Increase in RT of three kinds of pantyhose after work was smaller significantly than that of a pantyhose with the lowest clothing pressure in all samples used.There was no significant difference in FV.3) Score of compressive feeling of trial pantyhose was lower than that of the pantyhose on the market.4) Compressive comfort of the trial pantyhose knitted in single covered yam was almost independed on the preference of the clothing pressure.
{"title":"Effects of Support Pantyhose with Loop Length Controlled in the Course Direction on the Swelling of Lower Legs, Fatigue and Comfort","authors":"Miyuki Nakahashi, Harumi Morooka, C. Nakajima, Seizo Satoh, H. Morooka","doi":"10.4188/TRANSJTMSJ.54.4_T65","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.4_T65","url":null,"abstract":"This paper aims to clarify wear performance of trial support pantyhose of which front pressure was lower by being controlled loop length in course direction.Experiments for examining effects of trial pantyhose on swelling of lower legs, fatigue (Reaction time (RI), Flicker value (FV)), compressive feeling and comfort were made.As subjects, thirty-three women working in a department store were employed.The results obtained were as follows : 1) When the mean clothing pressure of pantyhose is higher, the swelling of lower legs (Sw) became smaller significantly.In a case of Sw>0, the trial pantyhose were more effective than the pantyhose on the market.2) Increase in RT of three kinds of pantyhose after work was smaller significantly than that of a pantyhose with the lowest clothing pressure in all samples used.There was no significant difference in FV.3) Score of compressive feeling of trial pantyhose was lower than that of the pantyhose on the market.4) Compressive comfort of the trial pantyhose knitted in single covered yam was almost independed on the preference of the clothing pressure.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123333855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-04-25DOI: 10.4188/TRANSJTMSJ.54.4_153
G. Taylor, Szeto Ys
An Internet-based service of specific relevance to the issue of azo dyes subsequent to changes in regulations on imports of dyed textile goods to Germany, is discussed.Decision support for the entire supply chain, incorporating codes of practice, accreditation in the context of internationally recognised standards, and training for personnel in order that they might conduct business in an ethical manner is also explored in this paper. Systems design and the selection of data is illustrated by reference to environmental issues, working conditions, employee welfare and legal compliance.
{"title":"Decision Support Systems for the Textiles & Clothing Industry","authors":"G. Taylor, Szeto Ys","doi":"10.4188/TRANSJTMSJ.54.4_153","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.4_153","url":null,"abstract":"An Internet-based service of specific relevance to the issue of azo dyes subsequent to changes in regulations on imports of dyed textile goods to Germany, is discussed.Decision support for the entire supply chain, incorporating codes of practice, accreditation in the context of internationally recognised standards, and training for personnel in order that they might conduct business in an ethical manner is also explored in this paper. Systems design and the selection of data is illustrated by reference to environmental issues, working conditions, employee welfare and legal compliance.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129574362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-25DOI: 10.4188/TRANSJTMSJ.54.3_114
G. Taylor, A. Kung, E. Cheng, C. Chow, V. Leung, S. Yung
This paper discusses the methodology developed for 3-dimensional pattern derivation within the context of the Pattern Design Technology Centre, which was opened in the Institute of Textiles & Clothing, The Hong Kong Polytechnic University, in 1998. Options for transferring know-how to the industry are explored and reference is given to commercialisation of the computer-based system. Recommendations are provided for the effective cooperation of academic and industrial personnel in the context of technology transfer.
{"title":"Pattern Design Using 3D Software-A Case of Technology Transfer in Hong Kong.","authors":"G. Taylor, A. Kung, E. Cheng, C. Chow, V. Leung, S. Yung","doi":"10.4188/TRANSJTMSJ.54.3_114","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.3_114","url":null,"abstract":"This paper discusses the methodology developed for 3-dimensional pattern derivation within the context of the Pattern Design Technology Centre, which was opened in the Institute of Textiles & Clothing, The Hong Kong Polytechnic University, in 1998. Options for transferring know-how to the industry are explored and reference is given to commercialisation of the computer-based system. Recommendations are provided for the effective cooperation of academic and industrial personnel in the context of technology transfer.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115188630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-25DOI: 10.4188/TRANSJTMSJ.54.3_T57
Minzhuang Yang, Li Qin, M. Matsudaira
To evaluate dynamic drape behavior of fabrics in swinging motion of fabrics, a testing device to measure dynamic drapeability in continuous swinging motion was designed, and new adequate parameters that can represent dynamic drapeability of fabrics were defined and the stability of those parameters was discussed. Following conclusions were obtained. At the maximum angle in one-time swinging motion, fabrics were subjected to the largest acceleration and the projected area changed remarkably. It was concluded that the change of the projected area characterized dynamic drapeability of fabrics in swinging motion. Dynamic drape coefficient Dd was defined as a parameter of the dynamic drapeability, and it maintained high accuracy and reproducibility. Dd and mechanical parameters of bending and shearing properties of fabrics were studied precisely and the regression equations were derived from those mechanical parameters. It was shown clearly that Dd was controlled firstly by fabric weight, secondly by shearing property and bending property.
{"title":"Measurement of Drape Coefficients of Fabrics and Description of Those Hanging Shapes","authors":"Minzhuang Yang, Li Qin, M. Matsudaira","doi":"10.4188/TRANSJTMSJ.54.3_T57","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.3_T57","url":null,"abstract":"To evaluate dynamic drape behavior of fabrics in swinging motion of fabrics, a testing device to measure dynamic drapeability in continuous swinging motion was designed, and new adequate parameters that can represent dynamic drapeability of fabrics were defined and the stability of those parameters was discussed. Following conclusions were obtained. At the maximum angle in one-time swinging motion, fabrics were subjected to the largest acceleration and the projected area changed remarkably. It was concluded that the change of the projected area characterized dynamic drapeability of fabrics in swinging motion. Dynamic drape coefficient Dd was defined as a parameter of the dynamic drapeability, and it maintained high accuracy and reproducibility. Dd and mechanical parameters of bending and shearing properties of fabrics were studied precisely and the regression equations were derived from those mechanical parameters. It was shown clearly that Dd was controlled firstly by fabric weight, secondly by shearing property and bending property.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115914609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-25DOI: 10.4188/TRANSJTMSJ.54.3_T50
Chiyomi Mizutani, Rousselle Marie-Alice
The hydrolysis of native cellulose by cellulase has been studied from the view point of synergistic action of three cellulase component, endocellulase (1, 4 -β-D-glucan 4 -glucanohydrolases), exocellulase (1, 4-β-D-glucan cellobiohydrolases) and β-glucosidase. We have attempted a separation of the commercial Trichoderma reeseicellulase by means of chromatography to enable us to measure enzymatic characteristics. Cellulosic fibers such as cotton, Tencel and viscose rayon and so on were used as the substrate for treatment by Trichoderma reeseicellulase to evaluate physical properties. Results from this work include : 1) Trichoderma reeseicellulase is rich in endocellulase after separation by chromatography.2) Characteristic changes of cellulosic fibers after enzyme treatment were measured, including weight loss and reducing sugar with increasing incubation time. However, crystalline structure of cellulosic fibers has not changed after treatment. Degree of polymerization and that of crystallinity of cellulosic fibers except Tencel have changed slightly.
从纤维素酶三种组分，即纤维素内酶(1,4 -β- d -葡聚糖- 4-葡聚糖- 4-葡聚糖水解酶)、纤维素外酶(1,4 -β- d -葡聚糖纤维素生物水解酶)和β-葡萄糖苷酶协同作用的角度，研究了纤维素酶对天然纤维素的水解作用。我们已经尝试用色谱法分离商业木霉reese纤维素酶，使我们能够测量酶的特性。以棉花、天丝、粘胶丝等纤维素纤维为底物，用里氏木霉纤维素酶对其进行处理，评价其物理性能。结果表明:1)经层析分离后，木霉纤维素酶中含有丰富的内纤维素酶。2)测定了酶处理后纤维素纤维的特性变化，包括随着培养时间的增加，纤维素纤维的失重和还原糖。然而，纤维素纤维的晶体结构在处理后并没有改变。除天丝外，纤维素纤维的聚合度和结晶度均有轻微变化。
{"title":"Enzymatic Degradation of cellulosic Fibers by Trichoderma Reesei Cellulase","authors":"Chiyomi Mizutani, Rousselle Marie-Alice","doi":"10.4188/TRANSJTMSJ.54.3_T50","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.3_T50","url":null,"abstract":"The hydrolysis of native cellulose by cellulase has been studied from the view point of synergistic action of three cellulase component, endocellulase (1, 4 -β-D-glucan 4 -glucanohydrolases), exocellulase (1, 4-β-D-glucan cellobiohydrolases) and β-glucosidase. We have attempted a separation of the commercial Trichoderma reeseicellulase by means of chromatography to enable us to measure enzymatic characteristics. Cellulosic fibers such as cotton, Tencel and viscose rayon and so on were used as the substrate for treatment by Trichoderma reeseicellulase to evaluate physical properties. Results from this work include : 1) Trichoderma reeseicellulase is rich in endocellulase after separation by chromatography.2) Characteristic changes of cellulosic fibers after enzyme treatment were measured, including weight loss and reducing sugar with increasing incubation time. However, crystalline structure of cellulosic fibers has not changed after treatment. Degree of polymerization and that of crystallinity of cellulosic fibers except Tencel have changed slightly.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128109664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-02-25DOI: 10.4188/TRANSJTMSJ.54.2_57
Harumi Morooka, Miyuki Nakahashi, H. Morooka, K. Kitamura
To clarify the effects of the clothing pressure exerted on a trunk by a swimsuit on heart rate, skin blood flow and respiratory function, wearing tests of seven female students were conducted. When a swimsuit was worn, blood pressure increased and heart rate decreased in a standing posture, furthermore, oxygen intake and ventilation decreased during exercise. From these results, we concluded that when the clothing pressure exerted on a trunk was rather low: lower than 1.0 kPa, venous pump action was promoted and work efficiency became higher. However, when the clothing pressure exerted on a shoulder and inguinal region was very high, skin blood flow to peripheral parts (foot) was suppressed and the recovery of blood pressure after exercise was delayed.
{"title":"Effects of Clothing Pressure Exerted on a Trunk on Heart Rate, Blood Pressure, Skin Blood Flow and Respiratory Function","authors":"Harumi Morooka, Miyuki Nakahashi, H. Morooka, K. Kitamura","doi":"10.4188/TRANSJTMSJ.54.2_57","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.2_57","url":null,"abstract":"To clarify the effects of the clothing pressure exerted on a trunk by a swimsuit on heart rate, skin blood flow and respiratory function, wearing tests of seven female students were conducted. When a swimsuit was worn, blood pressure increased and heart rate decreased in a standing posture, furthermore, oxygen intake and ventilation decreased during exercise. From these results, we concluded that when the clothing pressure exerted on a trunk was rather low: lower than 1.0 kPa, venous pump action was promoted and work efficiency became higher. However, when the clothing pressure exerted on a shoulder and inguinal region was very high, skin blood flow to peripheral parts (foot) was suppressed and the recovery of blood pressure after exercise was delayed.","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116726393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-02-25DOI: 10.4188/TRANSJTMSJ.54.2_3
T. Harada, Seishu Hayashi, H. Katsuma
{"title":"Recent Developments of Synthetic Speciality Fiber","authors":"T. Harada, Seishu Hayashi, H. Katsuma","doi":"10.4188/TRANSJTMSJ.54.2_3","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.54.2_3","url":null,"abstract":"","PeriodicalId":339262,"journal":{"name":"Sen'i Kikai Gakkaishi (journal of The Textile Machinery Society of Japan)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125032073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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