Journal of Fiber Bioengineering and Informatics
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  2022, Volume 15 Issue 4, 31 December 2022
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Clothing Pressure Gradient for Comfortable Pantyhose
Tamaki T Mitsuno, Sayuki Kondo
JFBI. 2022, 15 (4): 243-257.   DOI: 10.3993/jfbim03643
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Our aim is to develop a pantyhose that fit without being too tight and to reduce muscle fatigue. This study was conducted with 17 Japanese women who wore two types of pantyhose with a structural difference in the panty part. When wearing pantyhose with a clothing pressure that gradually increased from 2.9 hPa in the waist to 11.0 hPa in the foot, participants reported a nearly perfect pressure sensation using a ratio scale. Thus, pantyhose with an optimized pressure sensation can be created according to the clothing pressure gradient rule. When participants wore pantyhose, EMG changes in the lower leg significantly restricted muscle activity when compared to that in the barefoot condition, that was clarified the local distribution of pressure intensity determines the intensity of muscle activity.

Influence of Fabric Structure and Properties on Thermal Comfort of Medical Protective Clothing
Qing-hong Huang, Zhang-chi Liu, Tim Jun Li, Yi Li
JFBI. 2022, 15 (4): 259-274.   DOI: 10.3993/jfbim00981
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Medical protective clothing is an important personal protective equipment for medical staffs, especially in the pandemic. This research paper studied the effect of structure properties (material, yarn linear density and fabric thread density) of cotton and polyester fabrics on human thermal comfort. The main methodology entails using a CAD software to simulate the thermal comfort value of the individual when they wear a medical protective clothing made of 10 plain-woven fabric types. The normal effective temperature formula is used to simulate the clothing microclimate for evaluating the thermal comfort value. Three environment settings, indoor hospital conditions, outdoor environment of Manchester, UK in July and the outdoor environment of Hong Kong in July, are used in the simulation. Then analysis was conducted on the simulation results. The results indicate that yarn linear density has the biggest effect on the thermal comfort value. The cotton fabric with a yarn linear density of 131 Denier and thread density of 209/inch has the best thermal comfort performance. It also meets the physical strength requirements of surgical gown son EN 13795-1:2019. The result demonstrates that the moisture management capability of the fabric that affects dampness sensation of human body, is the most important ability to improve the thermal comfort value, and the influence of the yarn structure needs to be taken into consideration in the future studies.

Study on Elastic Distribution of Different Functional Regions of Bra Mold Cup
Jing Xia, Long Wu, Bo-an Ying, Jing Qi, Xin Zhang
JFBI. 2022, 15 (4): 275-285.   DOI: 10.3993/jfbim03591
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This paper explores the elastic coefficient of sponge material in different functional areas and functional zones of the bra mold cup to improve the accuracy of parameter setting in the finite element modeling of the bra mold cup, reduce the error of simulation experiment results, and provide more theoretical basis and data reference for functional research direction in the design and production process of the bra mold cup. In this paper, three converging bra mold cups of the same style and size are selected as samples, and the mold cups are divided into three measuring areas according to functional zones. Eight measuring points are selected, and micrometer and air bag contact pressure measuring system are used to measure the wearing pressure of each measuring point and the corresponding pressure of each measuring point when compressed every 0.2 mm. Excel software was used for linear fitting of data to obtain the range of elastic coefficients and elastic distribution of different functional regions of the bra cup. At the same time, this method can also be used to analyze the wearing pressure and elastic distribution of other types of bra mold cups, providing more research reference direction and technical basis for the design and production of bra molds cups.
Physical and Mechanical Properties of Coarse Bamboo Fibers Extracted by Different Techniques
Fisseha Wubneh Asmare, Xiaodong Liu, Guanfang Qiao, Ruixia Li, Dacheng Wu, Murugesh Babu K
JFBI. 2022, 15 (4): 287-302.   DOI: 10.3993/jfbim00399
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Bamboo fiber extraction methods include mechanical, stem explosion, water retting, enzymatic, and chemical methods. Each extraction method has drawbacks in terms of fiber quality, cost, efficiency, and environmental impact. The combined technique of fiber extraction was developed by combining two or more extraction methods in order to minimize the disadvantages of separate methods. This study developed and tested alternative combined fiber extraction procedures for the extraction of fibers from bamboo culms, with the goal of minimizing the drawbacks of separate extraction methods by using an environmentally friendly enzyme solution developed by a research group at Chengdu Textile College. The fundamental physical and mechanical properties of bamboo fibers were also investigated. The bamboo species studied were Dendrocalamus membranaceus (S-1), Neosinocalamus affinis (S-2), Phyllostachys heterocycle (S-3), and Phyllostachys bambusoides (S-4). Bamboo fibers with 6.6-56.37 cm fiber length, 5.12-95.02 tex linear density, 100-1446 cN breaking strength, 1.2-146.5 cN/tex breaking tenacity, 0.26-3.43% breaking elongation, and 1.44-173.56 cN/tex breaking modulus values were extracted. The coarsest bamboo fibers were extracted using a combined chemical (boiling alkali)-mechanical (rolling) technique, whereas the bamboo fibers with the lowest average length, fineness, and breaking modulus values were extracted using a combined enzymatic-chemical (alkali)-mechanical (rolling) technique. Bamboo fibers extracted using a combined chemical (alkali at room temperature)-enzymatic (by stacking)-mechanical (rolling) technique had the lowest average breaking strength, tenacity, and elongation values but the highest average length. Bamboo fibers with the highest average breaking strength, tenacity, and modulus values were extracted using a combined chemical (alkali at room temperature)-enzymatic (in solution)-mechanical (rolling) technique. The extracted bamboo fibers exhibited variations in fundamental properties, as is typical of plant fibers. The fibers extracted using a combination of enzymatic-chemical (alkali)-mechanical (rolling) methods showed the least variation.

A Review of Universal Fashion
Meng-Qi Fu, Li-Min Shi, Xiao-Chun Wang, Jing Guo
JFBI. 2022, 15 (4): 303-318.   DOI: 10.3993/jfbim03581
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This paper summarizes universal fashion for the physically disabled, visually disabled, mentally disabled and the elderly. From both physical and psychological needs, it focuses on clothing materials, clothing structure and smart wearable devices. Through this review, it is concluded that there are two distinctive features of the research on universal fashion. The first is the uneven focus on different universal groups. The largest research has been done on universal fashion for people with physical disabilities and it is the most mature. There are fewer studies on universal fashion for people with mental disabilities, and there are large research gaps. Secondly, the focus on universal fashion for the same group of people is also uneven. There is more research on clothing patterns than on clothing materials, but the development and application of clothing materials are more important, and there are still gaps in this part. Research on universal fashion for children with autism has not focused on the urgent need to address the problem of getting lost, so the author has designed an anti-wandering vest for children with autism, and it is worthwhile to continue to study this part in depth in the future. The future direction of research into universal fashion can be divided into two areas. On the one hand, there is the strengthening of new materials (including clothing fabrics and smart fibers) for universal people. On the other hand is the rational transfer of research methods from established disciplines to universal fashion research, relying on new technologies and interdisciplinary exchanges.

Thermal Behavior of Form-stable Paraffin/expanded Graphite Composites
Xiuling Zhang, Kai Yang, Mohanapriya Venkataraman, Jakub Wiener, Dana Kremenkova Guocheng Zhu Juming Yao, Jiri Militky
JFBI. 2022, 15 (4): 319-327.   DOI: 10.3993/jfbim03331
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A common phase change material (PCM) utilized for thermal energy storage is paraffin wax (PW). However, the applicability and thermal energy storage effectiveness of PW are constrained by its leakage and poor thermal conductivity. By using the melting-blending technique, composites of PW and expanded graphite (EG) were created, and investigations into the morphology and thermal behavior of PW/EG composites were conducted. in this study. It was found that PW was used as a coating to cover the EG structure and no leakage was detected. The final PW/EG composites had the latent heat of fusion around 122 J/g. Additionally, the embedded PW in EG had a higher degree of crystalline growth. We propose that PW/EG composites have significant potential in thermodynamics-related fields.

The Effect of Structure and Percentage on Compression Properties of Three-dimensional Knitted Fabrics
Bing-Jie Zhang, Lu-Ning Yuan, Jian-Ping Wang,Zhu-Jun Wang
JFBI. 2022, 15 (4): 329-341.   DOI: 10.3993/jfbim03571
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Seamless knitting technology involves knitting diverse tissue structures in the same three-dimensional knitted fabric in horizontal and vertical rows without forming seams, and the transition tissues are typically used for fabric tissues with significant differences in properties, however, it is usually easy to be overlooked in research. Three types of three-dimensional knitted fabrics were transformed in terms of tissue structure and increasing percentage. An AMI airbag contact pressure measurement system was used to establish pressure models with three different diameters of gum cotton cylinders to measure the interfacial pressure of the fabrics to study the effect of transitional tissue on the compression performance of three-dimensional knitted fabrics under tensile load. The study found that when the fabric stretch rate was at 0%, 25%, 50%, and 75%, the fabric stretch rate and pressure were positively correlated; the fabric tissue composition and number of components had a significant effect on the pressure, and the increase in the number of components caused the pressure at the tissue junction to increase significantly. This study aims to lay the groundwork for winter knitted sportswear pattern development and compression performance optimization.

Table of Contents - JFBI Vol 15 No 4
JFBI. 2022, 15 (4): 1000-.
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JFBI Vol 15 No 4 Cover
JFBI. 2022, 15 (4): 1001-.
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ISSN 1940-8676
Editor-in-Chief: Prof. Yi Li
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