巻号一覧
33 巻, 6 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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中川 三郎1977 年 33 巻 6 号 p. P181-P187
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (481K) -
鈴木 磨1977 年 33 巻 6 号 p. P188-P203
発行日: 1977/06/10
公開日: 2008/11/28
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松尾 達樹, 石崎 信男, 福田 卓司1977 年 33 巻 6 号 p. P204-P208
発行日: 1977/06/10
公開日: 2008/11/28
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菊地 良和1977 年 33 巻 6 号 p. P209-P213
発行日: 1977/06/10
公開日: 2008/11/28
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青谷 寛1977 年 33 巻 6 号 p. T233-T239
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーIn the previous reports, it has been shown for the development of anti-pilling acrylic fiber that polymerization and spinning conditions should be chosen so as the fiber to be brittle against shear strength and stable to heat treatment. In this paper, the relation between fine structure of acrylic fiber and anti-pilling property is studied.
Assumed acrylic fiber consists of crystalline structure with distribution in the regularity and part of comparatively higher regularity corresponds to crystalline region and lower part to amorphous one, then it is found based on the study of mechanical loss of α peak that small amount of amorphous region and strong restrictive force to intermolecular bond are necessary to give anti-pilling property.
For this purpose it is effective to strengthen CN-CN dipole interaction by reducing methylacrylate component and to raise density of crosslinkage by increasing sodium arylsulfonate component.
It is also found that the higher crystallinity and the higher degree of orientation (Fx) determined by X-ray diffraction give fiber the better anti-pilling tendency, and above all whole molecular orientation (Fs) of fiber measured by velocity of sound has much closer relation with anti-pilling property.
If the difference between Fx and Fs concerns with the orientation of amorphous region, its degree is supposed to be an important factor to provide anti-pilling property.
In case the value of tan δmax (αII)1/4 is considered besides Fs in order to add the restrictive force to intermolecular bond, and Fs/tan δmax (αII)1/4 is assumed as a new measure of fine structure, the relation between both structure and property can generally be explained fairly well.抄録全体を表示PDF形式でダウンロード (439K) -
青谷 寛, 山崎 勝己1977 年 33 巻 6 号 p. T239-T245
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーAs a method for improving pilling tendency of acrylic fiber by strengthening intermolecular force, it has been shown in the previous papers that polymer composition should have been changed to be composed of more monomer with-SO3 Na such as sodium arylsulfonate.
Mutual diffusion of solvent and coagulant, and change of the fine structure of the antipilling acrylic fiber during coagulation, drawing and drying of DMSO-H2O wet spinning process are studied in this report compared with conventional acrylic fiber.
1) Diffusion of H2Oin during coagulation is much increased by hydrophilic property of this polymer, while DMSOout does not change so much between both samples.
After all, ratio of mutual diffusion (H2Oin/DHSOout) of this polymer is larger than usual one.
The influence of dope temperature to diffusion, which has not been experimented up to the present time, is apparent and H2Oin reduces in proportion to raising dope temperature.
2) Coagulated filament consists of very fine fibrillar structure, which becomes coarser by raising temperature of coagulation bath.
However the influence of polymer composition to it is larger than that of bath temperature.
3) During drawing process, filament freeze-dried is observed as being dense and homogenized structure. Therefore these results suggest that freeze-drying condition is not sufficient to fix the fibrillar structure of filament, because the electron micrograph shows the existence of very fine fibrillar structure.
4) Orientation of fibrill during drawing process is comparatively low due to fine fibrillar structure of coagulated filament.
5) Remarkable minimum value of toluene density during drying process which has appeared in usual acrylic fiber as reported by several papers does not appear in this case.
It is supposed that hydrophilic property of polymer and fine fibrillar structure of filament give the moderate and homogeneous drying behaviour.抄録全体を表示PDF形式でダウンロード (1228K) -
西村 太良, 西条 賢次, 宗圓 寿一1977 年 33 巻 6 号 p. T246-T254
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーLow and high densities polyethylenes were extruded from a flat die by using high pressure extruder which was specially designed for this experiment. The experiment was performed at various temperatures, extruding rates and nozzle lengths. Extruding force was measured and appearances of extrudate, patterns of extrudate sections and flow patterns in the reservoir were observed.
When high density polyethylenes were extruded, a discontinuous point was observed on extruding force vs. extruding rate curve, therefore this discontinuous point appeared on the viscosity curve. In this point the appearance of extrudate and the pattern of extrudate section were obviously changed from smooth to rough appearance. We presumed that the melt fracture results from circumference oscillation of the cylindrical melt which is situated on the nozzle entrance. This was ascertained by analysis of the flow pattern.
Low density polyethylenes had large stagnant region at the corner of the reservior, where voltex flow was observed. This flow depended on extruding rate and temperature. As the melting of stagnant region flowed out irregularly and into the nozzle, the pattern of extrudate section and the appearance of extrudate were disturbed under any condition.抄録全体を表示PDF形式でダウンロード (2556K) -
清水 二郎, 鳥海 浩一郎, 今井 義隆1977 年 33 巻 6 号 p. T255-T260
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーAn experimental study of the variation in orientation and mechanical properties in isotactic polypropylene fibres with high speed melt spinning conditions especially take up velocities has been carried out.
The orientation factors in spun fibres were computed from density, birefringence and X-ray scattering measurements, and compared with mechanical properties measured from tensile testing.
The following results are obtained:
1) High speed melt spinning of isotactic polypropylene produced higher oriented fibres than from normal melt spinning. The fibres, however, could be strained above 350% and the initial Young's modulus were below 47g/d.
2) The initial Young's modulus was rapidly increased at the birefringence of 0.019. This birefringence was almost equivalent to about 3, 000m/min of take up velocity. In this region, the spun fibres were characterized by the disappearance of the yielding point in stress-strain relations.
3) It was defined the melt spinning with the take up velocities above 3, 000m/min as the high speed spinning of isotactic polypropylene. When the take up velocities were low, the density and the birefringence of the fibres were both dependent on spinning temperature, but in the high speed spinning, the birefzingence of the fibres was no longer dependent on spinning temperature. The density of the fibres was still dependent on spinning temperature or cooling rate, but was constant for the increase in the take up velocities in the region of the high speed spinning.抄録全体を表示PDF形式でダウンロード (919K) -
清水 慶昭1977 年 33 巻 6 号 p. T261-T265
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーC. I. Reactive Blue 19 (applied in the vinylsulfonyl-form), one of the sulfatoethylsulfonyl reactive dyes, was treated in buffer solution of pH range 7.1-10.2. The resulting ether-form was investigated on the amounts of formation, the stability and the dyeability.
The following results were obtained:
1) The maximum yield of formation of the ether-form from the vinylsulfonyl-form was 37.15% at 60°C, 18.55% at 80°C.
2) The ether-form was very stable in neutral solution at 60°C but considerably decomposed at 80°C even in pH 7.19.
3) The ether-form did not fix for degummed silk in acidic condition but did in neutral or alkaline solution and then the maximum fixation was about 30% at 80°C.
4) When the ether-form was treated in buffer solution, the formation of the vinylsulfonyl-form was observed. In addition, the ether-form exhibited a considerable fixation for degummed silk as mentioned above. For these reasons, it seemed that the following reaction was occurred both in aqueous solution and on silk fber: Ether-form _??_ Vinylsulfonyl-form+Hydroxyethylsulfonyl-form From these results it was considered that the existence of the ether-form was negligible in the silk dyeing under the following condition: Temperature: 80°C, pH: 7-9, Time: 1-2hr抄録全体を表示PDF形式でダウンロード (270K) -
小森 尚志, 牧島 邦夫1977 年 33 巻 6 号 p. T266-T271
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーIn order to express the sizes and geometrical anisotropies of void spaces in a random fiber assembly which has an arbitrary distribution of fiber orientation, two quantities of aperture circle and free length are introduced and their distributions are derived statistically.
It is found that the approximate probability density functions of the radius of aperture circle, γ, and free length, l, are given by
f(r)=2πν(r+ρ)e-πν(r+ρ)2
h(l)=ne-n(l+λ)
respectively, where ν, ρ, n and λ are the quantities proper to the assembly, through which the anisotropies of void structures are expressed.抄録全体を表示PDF形式でダウンロード (400K) -
知野 光伸, 鈴木 恵1977 年 33 巻 6 号 p. T272-T279
発行日: 1977/06/10
公開日: 2008/11/28
ジャーナル フリーSince shrinkage of the plain fabrics is said to be important in weaving process, theoretical and experimental investigations on the shrinkage of the plain fabrics are dane by changing yarn count, weaving density and warp or weft yarn tension in this paper.
The results obtained are as follows:
1) The cross angle of warp and weft yarn increases by decreasing the warp yarn tension or increasing the weft yarn tension.
2)The cloth shrinkage on loom is dependent upon the count of the warp and the weft yarn, the weaving density and the structure of the cloth.
3) The shrinkage of warp direction increases by increasing the warp yarn tension. And the shrinkage ratio ε of the cloth out loom is given by the following where, λ: The difference of yarn interval between the cloth on loom and the cloth out loom. K2: Density per 1cm of warp or weft yarn ofthe cloth out loom. _??_: The siarinkage ratio of the cloth on Ioom of warp or weft line.抄録全体を表示PDF形式でダウンロード (476K)
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