巻号一覧
14 巻, 5 号
選択された号の論文の12件中1～12を表示しています
- |<
- <
- 1
- >
- >|
-
墨金 次郎1958 年 14 巻 5 号 p. 269-272
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (370K) -
内藤 万寿雄, 崎山 宗吉1958 年 14 巻 5 号 p. 273-277
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーThe degree of polymerization of alkali cellulose which is ready to be used for xanthation is very important in relation to the quality of the product. A series of experiments was carried out on semi-commercial of scale to find the effects of alkali cellulose prepared for xanthation upon viscosity of viscose and various properties of filaments.
1. The viscosity of viscose is considerably affected by the distribution of DP, especially by the higher fractions. The viscose made from the alkali cellulose having uniform chain lengths of cellulose (Viscose A in Table I and Fig. I in test) showed the lower viscosity and excellent filament property. The tenacity and elongation of fibers made from this viscose were better than those of fibers made from the viscoses (B and C) having higher viscosities which are due to the greater variety in chain lengths of cellulose. (See Table I and Fig. I in text.)
2. Three kinds of viscoses were prepared from alkali celluloses having lower mean DP (Viscose A in Table II in text) and higher mean DP (Viscose B and C in Table II in text). The DP's were controlled by aging. The filaments were spun from these three viscoses on semi-commercial scale. The properties of filaments, that is the crimp property, dry and wet tenacity, dry and wet elongation, and uniformity of tenacity of tenacity were measured. The viscose characterized by lower mean DP of cellulose is the best in all respects. (See Table II).
3. Tire cords were spun with viscoses differing in viscosityies, and their tenacities were measured as a function of viscosity of viscose. (Table III and Fig. III)
The viscoses having lower viscosities gave the cords of greater strengths.
4. The higher viscosity of viscose due to the diversity in chain lengths of cellulose is not desirable. The aging of alkali cellulose should be done to sufficient extent to minimize the higher fractions. The optimum mean DP of cellulose of the alkali cellulose fit for xanthation was 330_??_350 under the conditions used in this experiments.
The thought that the viscose characterized by the higher DP of cellulose gives the better filaments would be of little worth so far as the standard conditions of processing of viscose is concerned.抄録全体を表示PDF形式でダウンロード (427K) -
井内 亮, 尾鷲 寿郎, 宮本 晃1958 年 14 巻 5 号 p. 278-281
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリー1) The wetting of alkali cellulose by liquid CS2 in xanthaion apparata was obsrved, using solid paraffin-CCl4 solution colored with Sudan III as a tracer of liquid CS2. CCl4 was removed by evaporation, and alkali celluose marked with solid paraffin was separated from intact part by the flotation on water. Each amount of cellulose was determined after extracting the solid paraffin and alkali. Alkali cellulose is supposed to be considerably wetted by liquid CS2 in ordinary industrial reaction conditions. Visually homogeneous wetting is reached within very short time in a kneader, whereas a rotating drum (churn) shows less mixing action.
2) Neither the CS2 yield (ratio of CS2 amount consumed for the xanthate formatiom to that consumed totally) nor the water solubility of reaction product showed abnormality, even if alkali cellulose was made reacted with excess liquid CS2.
3) When H2S containing excess liquid CS2 was used for reaction, CS2 yield decreases and solubility of reaction product lessens considerably.抄録全体を表示PDF形式でダウンロード (293K) -
各種木材への薬液浸透状態およびその浸透距離について下田 功, 新藤 明弘1958 年 14 巻 5 号 p. 282-287
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーThe penetration of sodium sulfite solution into the woods was studied under the following conditions:
(1) Room temperature (15_??_20°C) and without giving pressure
(2) Room temperature (15_??_20°C) and under reduced pressure (0.5 atm.)
(3) 140°C and under giving pressure (12kg/cm2, gauge), (vid. Fig. 1)
(vid. Fig. 2, 3, 4, 5)
Three kinds of softwood and eight kinds of hardwood were used (poplar, lime, spruce, white fir, red pine, birch, alder, itaji, scaber, beech and oak).
For the second condition, (2) Pretreatment is effective to lessen the difficulty of the penetration of sodium sulfite solution into the wet wood.
In case of the third condition. (3) The wood being 80mm long, sodium sulfite solution penetrates to the innermost part within about 25 min.
From this fact, it is considered that the penetration will be completed by 6_??_8 hours treatment when the wood is 750_??_900mm in length. Presumably 6_??_8 hours treatment in factory is sufficient to have sodium sulfite solution penetrated to the innermost part of woods.抄録全体を表示PDF形式でダウンロード (412K) -
木下 茂武, 行方 寅次郎1958 年 14 巻 5 号 p. 288-293
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーThe mercury-intrusion method for the study of pore-size distribution of porous materials was applied to assembly of fibres as such as woven fabrics and card slivers. In this paper, these determinations were made on various fabrics, compressed slivers and twisted slivers, at low pressure from 10-4mmHg to 2 atomospheric pressure in glass dilatometric apparatus. And the following results were obtained:
1. The three woven fabrics were selected for study of pore-size distribution. These fabrics were woven from 30/2′S cotton yarns with same number of twist per inch. One of them was woven plain weave with loose thread counts, and another two fabrics were woven twill weave closely (Table I). On the relation between pore-size distribution and thread counts in fabrics, a shift of the distribution curve peak to smaller pores was observed as the thread count was increased. (see Fig. 4)
2. The compressed card slivers were selected for the study of dependency of bulk density on the pore-size dististion. These slivers were composed of 2 d. viscose rayon filaments and their linear density was 0.04 grams per cm. The pore-size distribution curves obtained for five sliers with various compression ratio, as shown in Table II, indicate that a shift of the distribution curve peak to smaller pores was observed as the compression ratio was increased (see Fig. 6).
3. The determination of pore-size distribution curve was selected for five slivers in various twist number per cm. On the relation between pore-size distribution and twist number per cm in sliver, the pore-size distribution curve indicated that a shift of the distribution-curve peak to smaller pores was observed as the twist number was increased (see Fig. 9).抄録全体を表示PDF形式でダウンロード (385K) -
第1報 単繊維の撚り硬さについて村田 武司1958 年 14 巻 5 号 p. 294-299
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーTorsional rigidity G, torsional internal friction ξ of Saran (P. V. C.-P. V. D. C.) 500 denier, Nylon-6 (Polycaproamide) 250 denier monofilaments during twisting were measured over a range of frequency from 1 to 10 cycle by the torsional free vibrating method.
The results obtained are as follows:
(1) The frequency dependence for G, ξ of Saran, Nylon-6 are same as frequency dependence for modulus of elasticity and coefficient of viscosity by longitudinal vibration methods. The tendency is independent of tension and twisting.
(2) G (at frequency of about 4 cycle) of two samples shows an appreciable degree of increase with increasing tension, ξ (converted into the value for frequency of 4 cycle) shows almost no change and twisting has no influence upon this tendency.
(3) G, ξ (for 4 cycle) of two samples increase with twist, and the inflection point appeares at 50_??_60/10cm. twist for Saran, 90_??_95/10cm twist for Nylon-6 as shown in Fig. 8, Fig. 9, and the elongation of external surface of monofilaments at this point are 10% for Saran, 13% for Nylon.抄録全体を表示PDF形式でダウンロード (496K) -
呉 祐吉, 篠原 昭1958 年 14 巻 5 号 p. 300-303
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーIt is convinient to apply the difference cquation to the fabric deformation analysis, above all, in the case of low density fabric such as leno, where this method may be very effective
(1) In order to analyse draping shape of hanged curtain, we can apply this equation to a simple model of this phenomenon as shown in Fig. 2, and the deflection of horizontal elements of its model, δxmay be expressed:
where To is tension applied, K and λ are constant.
(2) In the M. I. T. Drape-o-meter, the chord-length lx, at a point x of the model as Shown in Fig. 4, is obtaind by this idea, with the function it leads to:
(3) Normal pressure of cross point of the warp and weft yarns is obtained by applying this difference equation to the 3 moments theorem of continuous beam.抄録全体を表示PDF形式でダウンロード (864K) -
第3報 経糸の曲げこわさにもとずく一考案久世 栄一1958 年 14 巻 5 号 p. 304-310
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーIt is generally recognized that the weaving technique using the stiff warp yarn is troublesome.
This report deals with the interlacing construction between the cylindrical weft and the elastic warp yarns.
The curvature of the elastic warp yarn between of the weft yarns is determined by the contact conditions of the weft and warp yarns (i.e. the frictional coefficient and the stress-resultants at the contact point), and also by the warp tension and the flexual rigidity EI of the warp yarn.
The curve (see: Fig. 2) between the origin and the inflection point θ1 may be expressed: and from θ1 to the contact point between the warp and weft yarns: where, the origin of coordinates in the contact point between the warp and the weft yarns near the cloth-fell, and the coordinate x coincides with the tangent at this contact point, and k, c, ψ; the constants in relation to the contact condition between the warp and the weft near the cloth-fell. θ: Angle formed by the tangent at the point on the curve of the warp and the coordinate x θ1: θ at the inflection point of the curve
Then calculating the coordinate x2, y2 at the contact point between the warp and the weft, being far from the cloth-fell, from the equations
(1)-(2), The following results are obtained:
(1) Both x2, y2 increase in proportion to √EI,
(2) Under the contact conditions between the warp and weft, being near to the cloth-fell having the stress-resultants and tension and shearing force increased, show the same tendeny.
(3) The larger the warp tension is, the smaller x2, y2,
(4) The changing tendency of the curve of the warp is influenced by the frictional coefficient between the warp and weft yarns and the shedding angle.
(5) The stress-resultants are influence by the construction of the woven fabrics.抄録全体を表示PDF形式でダウンロード (442K) -
石川 左武郎, 大川 豊1958 年 14 巻 5 号 p. 311-315
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーIn order to obtain a clear insight into the deformation mechanisms of fibre gel during dry spinning processes, the creeps of fibres were measured at 25°C in liquid paraffin. In this report, the relations of the breep behaviours of fibres and spinning conditions are discussed, especially by compearing the coefficients of simplest mechanical model representing fibre deformation.
The creeps of fibres were influenced very much by the solvent composition of spinning liquid. The better the solvent, the less the creeps of fibres. The higher the temperatures at dry spinning, the more the creeps of the fibres. And the maximum of retardation spectrum of fibres shifted to the farther left side than the maximum of fibres which were supnd at lower temperature. Spinning speed also influenced on the creeeps of the fibres. The less creep behavior is subject to the orientation of fibres which took place during the spinning proces.抄録全体を表示PDF形式でダウンロード (376K) -
第XXI報 Hg(NO3)2-HNO3-NaNO2系キャロッテイング条件と比重との関係池田 佐喜男, 岡島 三郎1958 年 14 巻 5 号 p. 316-320
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーThe furs were carroted under various conditions and the change in crimpiness was observed in the previous reports. In this paper the change of the specific gravity of the same samples is examined. The result shows that the specific gravity increases as the HNO3 concentration of the carrotting agents and the immersion temperature are raised. And the fur of the larger specific gravity which is highly crimped has also larger weight increase, and colours in to orange more deeply.
The observations which were described in the reports, XIX_??_XXI, give some suggestion to the chemical mechanism of the carrotting reaction.抄録全体を表示PDF形式でダウンロード (379K) -
第1報 フェノール処理 第2報 銅塩処理橋本 健1958 年 14 巻 5 号 p. 321-328
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (506K) -
第1報 紡績糸の耐候試験深川 勝, 竹島 寛治1958 年 14 巻 5 号 p. 329-338
発行日: 1958/05/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (574K)
- |<
- <
- 1
- >
- >|