巻号一覧
35 巻, 9 号
選択された号の論文の11件中1～11を表示しています
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石川 章一1979 年 35 巻 9 号 p. P241-P242
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (163K) -
加藤 悌三1979 年 35 巻 9 号 p. P243-P247
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (535K) -
中村 良治1979 年 35 巻 9 号 p. P248-P257
発行日: 1979/09/10
公開日: 2008/11/28
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廃液処理規制を主として佐貫 治夫1979 年 35 巻 9 号 p. P258-P265
発行日: 1979/09/10
公開日: 2008/11/28
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田中 伊都郎, 渡辺 一雄1979 年 35 巻 9 号 p. T361-T369
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーWith attention to the usage as garments, polymerization, wet spinning and typical properties of three kinds of aromatic polyamides, namely poly-4, 4′-diaminodiphenylmethane-isophthalamide (PAPM-I), poly-3, 3′-diaminodiphenylsulfone-isoph thalamide (MDAS-I), poly-m-phenylneisophthal-amide (MPA-I), were investigated.
By using conventional polymerization process, high molecular weight polymers were obtained for the former two but in the case of MPA-I, the diamine monomer being unstable, meticulous control was necessary to obtain the high molecular weight polymer.
PAPM-I could be spun in water and gave fiber satisfactory with DT 4.8g/d and DE 10%. On the other hand, MDAS-I and MPA-I needed aqueous solution of highly concentrated inorganic salt as coagulant.
These three polymers were self-extinguishing and passed most flammability tests. Generally it is said that light-fastness and dyeability of aromatic polyamides are not acceptable. The relevant results indicated that this is the case with PAPM-I and MPA-I but MDAS-I showed fair improvement though insufficient for the use as garments. The thermal stability could be evaluated by the retention of tenacity and elongation of fibers or by the viscosity of polymers; MPA-I was superior to others. From the facts described above, we conclUded that these polyamides are not suitable to be used in garments and it will be necessary to improve certain properties such as light-fastness and dyeability.抄録全体を表示PDF形式でダウンロード (622K) -
安田 浩, 杉山 博茂, 染川 博生1979 年 35 巻 9 号 p. T370-T375
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーNumerical calculation of the theoretical equations for melt spinning was conducted under the steady state condition. Calculated results were related to the structural and mechanical properties of as-spun yarn. It was found possible to estimate the yarn properties easily by the computer simulation.
The calculation shows;
1. The observed birefringence of poly(ethylene terephthalate) (PET) fiber is related to the computed spinning stress, viz., stress value at the point where the ratio of the yarn running velocity to take-up speed is 0.95.
2. In high speed melt spinning, the average degree of orientation of a filament is determined mostly by the take-up speed.
3. The orientation distribution across a filament becomes larger with the increase of the spinning speed, which may be caused by the increased temperature gradient across a filament.
4. To decrease the orientation distribution, increase in the cooling air temperature during the melt spinning process is effective.
Experiments of PET melt spinning showed good agreements with the above-mentioned expectations.抄録全体を表示PDF形式でダウンロード (431K) -
Taro Nishimura, Kenji Saijo, Yuji Matsui, Toshiichi Soen1979 年 35 巻 9 号 p. T376-T381
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーIn the case of the extrusion of polypropylene near the melting temperature, an anomalous increase in extruding pressure was observed. Bagley plots of extruding pressure in this region deviated from the linear relationship. To explain this anomalous increase, an additional pressure drop was adopted, which was separated from the extruding pressure by use of the reduced time-temperature superposition, that is, the extruding pressure was described as a sum of the pressure drop due to the viscous flow in a capillary, the drop due to the entrance effect and the additional drop mentioned above.
Part of the additional pressure drop was explained based on the reduction of free volume in terms of the Doolittle free volume theory and the Tait equation, and the other part of the pressure drop was suggested to be due to hindrance by some crystallites produced in the polymer melt.抄録全体を表示PDF形式でダウンロード (1752K) -
渡辺 明, 近藤 浩, 黒崎 新也, 近田 冨士雄1979 年 35 巻 9 号 p. T382-T387
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーMany theoretical studies about the fabric compressibility have been presented after F. T. Peirce (1947). There were, however, few reports which dealed with the behavior of the yarn in the fabric under compression. In this report, the deformation of the yarn in the fabric with compression, and the relation between the deformation and compressional properties of the fabric were clarified.
Microscopic pictures of the fabric cross-section were shown in Fig. 2. Deformations of the yarn cross-sectional shape were illustrated in Fig. 3. From the results, the yarn packing factor (1-ε) were calculated, and shown in Fig. 4. The pressure-thickness curves shown in Fig. 5 were represented as follow;
P=Beβ(1-h/h0.5)
(P: pressure g/cm2. B: constant 0.5g/cm2. 1-h/h0.5: stran, β: parameter)
The parameter β is a factor which represents the degree of the fabric compressibility. That is to say, the fabrics with low value of β are compressed easily. In both the twistless and twisted yarn fabrics, the strongest dependence was observed between the yarn packing factor (1-ε0) and the parameter β as shown in Fig. 8. Here (1-ε0) is the yarn packing factor in the fabric without compression. This means that the fabric compressibility depends on the yarn packing factor (1-ε0). The relation between the changes of the yarn packing factor (1-ε) and compressional forces (_??_n P) were shown in Fig. 9. In twistless yarn fabrics with low fabric density, the yarn packing factor (1-ε) increased remarkably with compressional force in the region of 0_??_100g/cm2 On the other hand, the yarn packing factor (1-ε) of the twisted yarn fabrics was hardly changed. These experimental results explain why the twistless yarn fabrics are felt more softly comparing with conventional twisted yarn fabrics.抄録全体を表示PDF形式でダウンロード (1111K) -
菅沼 恵子, 矢部 章彦, 飛田 満彦1979 年 35 巻 9 号 p. T388-T393
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーThe photofading behavior of disperse dye type FBA, trans-1, 2-bis (5-methyl-2-benzoxazolyl) ethylene, on PET films dyed under various conditions was kinetically investigated.
The rate of photofading of the FBA on PET films dyed from aqueous ethanol dyebath increased as the rise in their heat setting and/or dyeing temperatures. In the case of PET films dyed from water dyebath, the dye faded more slowly on the films dyed at temperatures below 130°C than on those dyed at temperatures above 130°C.
These results may suggest that the fine structure of PET film changed at about 130°C both in aqueous ethanol and water, and affected the distribution of the FBA molecules on the substrate.
These photofading behavior of the FBA has been provisionally interpreted by the kinetic parameter (α), which is proportional to the ratio between the unimolecular and bimolecular rate constant of the photo-reaction, and by CF curve under different dyeing conditions.抄録全体を表示PDF形式でダウンロード (398K) -
Hisao Ichijo, Atsuo Shibuya, Noboru Aisaka, Shigeo Ogawa1979 年 35 巻 9 号 p. T394-T399
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーSeveral mixing models are proposed in order to analyse the mixing process of pits for waste water and to offer some data for evaluating the smoothing effect of them. In general, real pits are found to be very effective for smoothing the pollution level of waste water. In the case that the variation of flow rate with time is small, perfect-mixing tank model reasonably explains COD variation of effluent from a pit. On the other hand, in the case that the variation is large, various modified models expressing the deviation from perfect-mixing for low flow rate are much better than simple perfect-mixing tank model.抄録全体を表示PDF形式でダウンロード (274K) -
鳥羽 栄治, 青沼 務, 沢路 雅夫1979 年 35 巻 9 号 p. T400-T403
発行日: 1979/09/10
公開日: 2008/11/28
ジャーナル フリーThis paper describes an attempt to detect the irregular temperature fluctuation (output signal) right after passing through woven fabrics by the use of a special CA thermopile having high sensitivity and fine frequency characteristics. By finding the ratios of changes in amplitude and phase of inputoutput signals, we have tried to measure temperature transfer characteristics of woven fabrics in case of the dynamic state.
The main results obtained are as follows.
1) The temperature transfer characteristics of woven fabrics are closely related to the degree of the air permeability; the higher the degree is, the better temperature transfer characteristics are.
2) {G (s)}, the temperature transfer function of woven fabrics, can be expressed as G (s)=e-Ls/(1+Ts). Thus, the temperature transfer characteristics of woven fabrics are evaluated by calculating the value of T and L.抄録全体を表示PDF形式でダウンロード (282K)
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