巻号一覧
52 巻, 1 号
選択された号の論文の14件中1～14を表示しています
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太田 裕子, 福増 章夫, 西村 優子, 中村 邦雄1996 年 52 巻 1 号 p. 1-6
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーThe effects of water on viscoelastic properties of human hair were investigated by dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). Dynamic modulus (E') of dry human hair decreased linearly with increasing temperature. On the other hand, E' of wet human hair showed an inflection point near 0°C. Moreover, a new dispersion peak was observed in tan δ curves of human hair containing water molecules. The DMA curves of thioglicolic acid-treated human hair were similar to those of untreated human hair. Therefore, it was found that hydrogen bonds between protein chains in human hair acted more prominently than disulfide linkage (S-S linkage). The glass transition temperature (Tg) of human hair decreased with increasing absorbed water content (Wc) and then saturated at about 30% of Wc. The non-freezing water content (Wnf) of human hair measured by DSC was about 30%. This means that physical properties of human hair such as Tg and strength are controlled by bound water which is strongly restricted by hydrophilic groups of proteins.抄録全体を表示PDF形式でダウンロード (422K) -
豊田 宏, 坂部 寛, 伊藤 孝, 小西 孝1996 年 52 巻 1 号 p. 7-11
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーEffect of preparation conditions of polytetrafluoroethylene-coated glass fiber fabric (PTFE-glass mem-brane) on their structures and durabilities were studied. The observation of PTFE surfaces by a scanning electron microscopy (SEM) revealed that the quenched specimen was smooth while the slowly cooled (at about 1°C/min) specimen had sheaf-like bands and spaces between these banded structures. The crystallinity of PTFE was determined by the differential scanning calorimetry (DSC) and the density gradient method. Results showed that the crystallinity of the quenched specimen was about 30% and that of the slowly cooled specimen was 65%. Tensile strength of the PTFE-glass membrane was independent of the crystallinity of PTFE. However, the retained tensile strength for the slowly cooled specimen with high degree of crystallinity decreased after being immersed in water at 90°C for 14 days. This was because water was easily infiltrated into the surface layer of the slowly cooled specimen as confirmed by measuring the water vapor transmission rate. It was also found that the weight loss of the abraded PTFE-glass membrane increased as the degree of crystallinity of PTFE increased.抄録全体を表示PDF形式でダウンロード (1612K) -
山中 仁敏, 前川 春次, 中村 吉紀, 木村 良晴1996 年 52 巻 1 号 p. 12-17
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーUnidirectional multistack composites of two kinds of composite prepregs, mesophase pitch-based carbon fibers (MCF)/epoxy and alumina fibers (ALF)/epoxy, were prepared. Since MCF has higher modulus and smaller tensile elongation than polyacrylonitrile-based carbon fiber (PCF), the flexural strength and modulus of the multistack composites were found to be different from the similar composites prepared by combination of PCF and ALF. In the interply-type MCF/ALF multistack composites which have the AFL perpregs in the center, fracture began in the top layer (compression side) with the bending load decreasing. In the composites having MCF prepregs in the center, small cracks were formed in the MCF layer with a slight yielding of the bending load. Since the fracture was slowed down and even stopped by the hybrid lamination, abrupt destruction of the whole composite was successfully suppressed. The modulus of the composites, which could be elucidated by the lamination beam theory, increased with increasing number of MCF layers and was much higher than that of PCF/ALF multistack composites.抄録全体を表示PDF形式でダウンロード (912K) -
鮑 力民, 高寺 政行, 篠原 昭1996 年 52 巻 1 号 p. 18-26
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーEffects of gravitation and initial deflection on the large deflection of fabrics with fixed ends is investigated experimentally and analytically. Based on the theory of elastica under gravitation and on the revised Timoshenko theory of initial deflection, a FEM equation of fabrics with initial deflection was established, which was numerically solved under conditions with and without gravitation. Comparing the theoretical results with experimental ones revealed that, for supple elastica like as textile fabrics, the gravity and initial deflection could appreciable affect the post-buckling behavior, increasingly as the ratio of the sample length to the bending length or/and the initial deflection relative to the sample length became greater.抄録全体を表示PDF形式でダウンロード (539K) -
中村 妙子, 星野 裕之, 佐藤 哲也, 梶原 莞爾1996 年 52 巻 1 号 p. 27-31
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーWe attempted to analyze quantitatively the cool-warm feeling of color one of the most fundamental affections, in terms of colorimetric value which is supposed to correlate with the affective tone of color. We performed a visual experiment where either “cool” or “warm” was to be selected from the specimens selected systematically in the color space. The results confirmed that the cool-warm feeling was affected by hue and brightness rather than by hue and chroma. The visual evaluation was compared with the hue and brightness calculated from the colorimetric values, and the following empirical formula was found to represent the cool-warm indices (CW), CW=aBr-80 where Br denotes the brightness value. The coefficient a is given by a=20 {cos (π×ΔH5YR/50)+1} where ΔH5YR is the Munsell hue step from 5YR (0_??_ΔH5YR_??_50). The index CW is in the range from -100 to 100, and the value of its correlation coefficient with visual evaluations was found to be higher than 0.92.抄録全体を表示PDF形式でダウンロード (376K) -
吉村 由利香, 村田 夏美, 澤田 和也, 上田 充夫1996 年 52 巻 1 号 p. 32-36
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーFluorescent whitening is one of the most important processing for fabrics. Most of white fabrics are processed with the agents and many kinds of detergent for domestic laundry contain fluorescent brightening agent as a whitening auxiliary. For the quantitative determination of the fluorescent brightening agents adsorbed on fabrics, two methods have been conventionally applied, i. e. one is an extraction from the fabrics, the other is a direct measurement of fluorescent intensity of the fabrics. However, the extraction method is so tedious and the sample must be destroyed after the measurement. The direct measurement of fluorescent intensity of the fabrics gives us inaccurate values because of the concentration quenching of the fluorescence. It is, therefore, requested to develop an alternative method for the determination of the quantity of fluorescent brightening agent on the fabrics. We studied a new method based on the ultraviolet absorption or reflection of the fabric for quantitative analysis of fluorescence reagents adsorbed on a solid substrate. UV diffuse reflectance or UV transmittance of the sample was measured. In order to exclude interference of visible fluorescence from the brightening agent, a UV band-path fiber was set in front of the detector of the photometer. The UV diffuse reflectance of the sample was converted into K/S value at the absorption maximum wavelength. In the case of the transparent sample, the UV transmittance was measured and converted into absorbance. In each case, a linear relationship exists between the data measured by band-path filter methods and the concentration of fluorescence reagents on the samples which are determined by extraction method. From the results it could be concluded that this method would be an alternative way for the quantitative determination of fluorescence reagents on a solid substrate.抄録全体を表示PDF形式でダウンロード (382K) -
菅沼 恵子1996 年 52 巻 1 号 p. 37-40
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーWhen nylon fabrics were dyed with acid dyes, stiffness and crease recovery changed due to the adsorption of dyes. Stiffness increased, while crease recovery decreased with increase in dye content. However, neither stiffness nor crease recovery of dyed nylon fabrics varied with the kind of dyes. It was considered that nylon fabrics stiffened and that crease recovery decreased because of the dynamic restriction of nylon molecules due to the adsorption of dyes. It could be said that influence of the restriction on the stiffness and the crease recovery mostly depended on the dye content rather than kind of dyes.抄録全体を表示PDF形式でダウンロード (218K) -
天野 敏彦, 水口 智恵, 高田 和美1996 年 52 巻 1 号 p. 41-44
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーThe fluctuation of the clothing pressure was analyzed. The amplitude of the fluctuation was affected by the positions of a subject rather than the shape of wearing clothes. Under static conditions a peak at 0.2_??_0.4 Hz was observed in the power spectrum owing to the respiration. In the lower frequency range of the peak the spectrum changed depending upon the clothes and the positions. The spectrum components in this range appeared remarkably in the case of comfortable clothes or positions. The results showed that the analysis of the fluctuation in the clothing pressure was useful to evaluate the comfort of the clothes.抄録全体を表示PDF形式でダウンロード (258K) -
福島 隆1996 年 52 巻 1 号 p. P7-P12
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (1041K) -
溝手 敦信1996 年 52 巻 1 号 p. P13-P19
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (1050K) -
佐藤 貴哉, 寺松 泰英, 中根 俊彦1996 年 52 巻 1 号 p. P20-P26
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (1937K) -
鶴谷 良一1996 年 52 巻 1 号 p. P27-P30
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (1154K) -
塩坂 誠1996 年 52 巻 1 号 p. P31-P35
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (365K) -
大橋 弘明1996 年 52 巻 1 号 p. P36-P40
発行日: 1996/01/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (821K)
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