巻号一覧
18 巻, 1 号
選択された号の論文の7件中1～7を表示しています
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第3報 撚られたスライバ内の繊維間摩擦力について木下 茂武, 滝沢 俊治, 梅津 正1962 年 18 巻 1 号 p. 7-14
発行日: 1962/01/10
公開日: 2008/11/28
ジャーナル フリーIn this paper the correspondence of the induced pressure in twisted sliver with the compressed paessure in loaded wad was measured under such equilibrium condition that both of frictional forces at the two ends of metal wire inserted partly in the wool wad and partly in the twisted wool sliver were balanced (see fig. 1). At the balanced frictional state (see fig. 2), the experimental relations between the twist angle θ (deg/cm) of sliver having fullness (1-ε)s and the applied load R (g/cm2) of wad having fullness (1-ε)w are shown in fig. 4. On the other hand, the effect of R on the withdrawal force Fw (g/cm) of single fibre from this wad was described by inverse sigmosoidal curve in fig. 5, and the dependence of Fw on R/(1-ε)w was obtained linearly as shown in fig. 7. Thus, frictional coefficient of wool fibre was estimated to μ0=0.26 by Postle-Ingham's method23). And then, the dependence of average frictional force Ft (g/cm) of a fibre in wool sliver on its twist number n (cm-1) was estimated from the load-elongation curves of twisted wool sliver. In fig. 10, this relation of Ft and n was plotted exponentially.
From these experimental results, detailed assignments of the mechanical state of a fibre in twisted sliver have been made as follows:
(1) In fig. 12 it is shown that the value of radial pressure Pw (g/cm) produced on the unit length of axial centre line of twisted sliver increases quadratically as twist number n increases.
(2) Inter-fibre frictional force Ft of twisted sliver increases with two sets of factors: one is bulk density increment of sliver by twisting, and another the curvature increment of fibre arrangement. The observed values of the former efiects on the frictional force of single fibre are given as Fw/4 in fig. 10, and those of the latter effect as (Ft-(Fw/4)) in fig. 10.
(3) The tortional behavior of wool sliver as a whole is similar to the spongy material, for the orientation of fibre in a twisted sliver was not arranged to regular spiral configuration, but intercected mutually as the results of fibre migrations. This makes possible to suggest that the value of inter-fiber frictional cofficient μ in twisted sliver is larger than that of μ0 in untwisted wool wad. Actually, inserting the observed values of Ft/(Fw/4), the average ratio of frictional force along the generating line of unit length, into eqs. (6), (7), calculated value of μ was about 1.抄録全体を表示PDF形式でダウンロード (594K) -
第1報 低伸長領域における挙動について大野 林蔵, 小松 直二1962 年 18 巻 1 号 p. 15-21
発行日: 1962/01/10
公開日: 2008/11/28
ジャーナル フリーDynamic viscoelastic properties in relatively low amplitude (0.30% elongation) and low frequency (1.21 c. p. s.) have been measured for several tire cord samples prepared under various spinning conditions and also various twisting conditions. The results are discussed in connection with the internal structures of the individual filaments and also with the cord structures. The following. observations are made:
1) The frictional properties of the filaments are varied by changing the oiling treatment. However it was found that the frictional properties has very minor effects on the overall viscoelastic properties measured under these conditions.
2) The cord structure was controlled by changing the number of twists and also the procedure of twisting. Apparently the properties of tire cords are governed exclusively by the cord structures.
3) The internal structure of filaments, determined by the combinations of factors such as crystallinity, size of crystallite, degree of orientation, contribute strongly to the cord structure. Thus, even the same number of twists and the identical proceedure of twisting were applied, the cord structures were markedly different depending upon the properties of individual filaments used. As the results, it was found difficult to isolate the direct effects of internal structures of individual filaments on the final viscoelastic properties of cords, because of the strong interposition of the effects of cord structures on the properties in the low amplitude.抄録全体を表示PDF形式でダウンロード (1194K) -
第1報 重合条件とPVA皮膜の膨潤度との関係 第2報 重合温度とPVAの2, 3の性状 第3報 重合温度と繊維性能石井 正雄, 陶山 英成1962 年 18 巻 1 号 p. 22-37
発行日: 1962/01/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1210K) -
第3報 酢酸綿濃厚溶液の粘度について (その1) 第4報 酢酸綿濃厚溶液の粘度について (その2)小西 彦市1962 年 18 巻 1 号 p. 38-45
発行日: 1962/01/10
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) -
第1報 過酸化水素による漂白およびその前処理效果について 第2報 ハイドロサルファイトの組合わせによる過酸化水素漂白およびそれら漂白パルプの退色性,薬品コストについて下田 功, 新藤 明弘1962 年 18 巻 1 号 p. 46-63
発行日: 1962/01/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1396K) -
第2報 熱処理による結晶性変化のX線的検討栗林 俊介, 中井 章能1962 年 18 巻 1 号 p. 64-72
発行日: 1962/01/10
公開日: 2008/11/28
ジャーナル フリーCrystallinity of polypropylene fibers subjected to dry- and wet-heat-treatment under tensionless and fixed states, was examined by x-ray diffraction by the following procedures:
The degree of crystallinity was determined by measuring the intensity areas of the crystalline and amorphous portion derived from the X-ray diffraction intensity curve on the powdered specimens. At this point, the diffraction intensity correction was made for counting loss and polarization Lorentz's factor. The crystallite dimension (crystal width) was determind with the half-width values obtained from the diffraction intensity curves of the (110) and (130) planes in equatorial scan on the fiber specimens. The orientation of crystallites was determined from the half-width values of the diffraction intensity curves along the Debye-Scherrer ring in the (110) and (040) planes. (In this study, the unit cell dimensions of polypropylene were based on Natta's data, as follows; a=6.65, b=20.96, c=6.50Å, β=99°20′, SG C62h-C2/c.)
The degree of crystallinity and the crystallite dimension increase by heat-treatment, more conspicuous by wet-heat-treatment. These changes in crystallinity become more remarkable in the heat-treatment above 120°C. The degree of orientation decreases by heat-treatment under tensionless state, and increases slightly by heat-treatment under fixed state. These changes are shown conspicuously in wet-heat-treatment.
From an observation of the relation between the degree of crystallinity and the crystallite dimension, the mechanism of crystallization in heat-treatment is tentatively discussed.抄録全体を表示PDF形式でダウンロード (1208K) -
石塚 修1962 年 18 巻 1 号 p. 73-77
発行日: 1962/01/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (403K)
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