著者

三輪 茂雄

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.29, no.7, pp.524-529, 1992-07-10 (Released:2010-04-30)

著者

早川 尚男

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.37, no.1, pp.26-33, 2000-01-10 (Released:2010-04-30)

参考文献数

18

著者

松岡 元

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.17, no.3, pp.148-150, 1980-03-10 (Released:2010-04-30)

著者

三輪 茂雄 細川 宏

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学研究会誌 (ISSN:18838766)

巻号頁・発行日

vol.6, no.4, pp.253-257, 1969-08-01 (Released:2010-08-10)

参考文献数

6

著者

早川 宗八郎 岩崎 好陽 菅 直人 阿部 勝彦

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学研究会誌 (ISSN:18838766)

巻号頁・発行日

vol.11, no.6, pp.327-332, 1974-08-01 (Released:2010-08-10)

参考文献数

10

---

It is well known that some inorganic powders show remarkable activities to extinguish fire. The authors proposed a kind of procedures to appreciate the activity and also to approach to the extinguishing mechanism. Propagating speed of flame was measured in the cylindrical combustion tube by the oscilloscopic patterns from the phototransistors attached on the wall (Fig. 1). The powder was poured from the funnel to be attached on the wall. Mixtures of methane and air of various pressures and components were used inflamable gases. The powder was (NH4)2HPO4 with average surface of 2.72m2/g. The examples of results were shown in Fig. 5 and 6, and Table 2. The extinguishing activity was estimated quantitatively, and its mechanism was concluded to be due to catalytic activity of surface and also partly to thermal decomposition of powder material.

著者

奥平 有三 安藤 秀行 佐藤 宗武 宮南 啓

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.32, no.5, pp.311-318, 1995-05-10 (Released:2010-04-30)

参考文献数

16

被引用文献数

1 2

---

The sound absorption coefficients and sound velocity of various powder beds were measured in the frequency range of 200Hz to 2kHz. The powder beds were comprised of classified powders having mean particle diameters from 53 to 300μm. For the powder beds consisting of smaller particles, the sound absorption coefficients showed distinct peaks due to the excitation of normal vibration modes of the powder bed. In the frequency range in which sound absorption peaks appear, the sound velocity has almost on frequency dependency, and sound energy is dissipated mainly by the interaction of vibrated particles. As particles with larger diameters were used, these peaks decreased in amplitude, but the level of sound absorption increased in the high frequency range. In this frequency range, sound velocity increases according to frequency, and sound energy is dissipated mostly by the viscosity of the air in the pores.

著者

志波 靖麿

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.28, no.11, pp.694-701, 1991-11-10 (Released:2010-04-30)

参考文献数

3

著者

大坪 建

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学研究会誌 (ISSN:18838766)

巻号頁・発行日

vol.1, no.2, pp.97-102, 1964-11-01 (Released:2010-08-10)

被引用文献数

1 2

著者

松尾 陽太郎 西村 聡之 神保 勝久 木村 脩七

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.28, no.3, pp.182-187, 1991-03-10 (Released:2010-04-30)

参考文献数

6

被引用文献数

1

著者

鈴木 健吾 中野 良平 山口 日出樹 丸田 彩子 中野 長久

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.50, no.10, pp.728-732, 2013-10-10 (Released:2013-10-18)

参考文献数

8

被引用文献数

4

---

There is a higher demand for naturally derived organic fillers than for conventional inorganic fillers, which have a greater environmental impact. For example, cellulose is commonly available organic filler ; however its dispersion in the matrix such as polymers may be poor depending on the base material, and it cannot even form a complex. In this study, we focused on paramylon, which is a naturally derived polysaccharide having unique physical properties. Using a universal testing machine EZ Graph-10 kN, we compared the physical properties of a compound containing 100 polypropylene, 20 paramylon, and 5 maleic-acid-modified low-molecular-weight polypropylene resin as a compatibilizer, with a filler-free compound of the same formulation It was found that with increasing paramylon, the maximum point stress and elasticity increased, while the maximum point displacement decreased. This result suggests that paramylon is a novel prospective filler material.

著者

三輪 茂雄

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学研究会誌 (ISSN:18838766)

巻号頁・発行日

vol.5, no.2, pp.1057-1068, 1968-05-01 (Released:2010-08-10)

参考文献数

12

著者

奥山 喜久夫

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.26, no.3, pp.195-202, 1989-03-10 (Released:2010-07-01)

参考文献数

15

著者

酒井 幹夫 山田 祥徳 茂渡 悠介

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.47, no.8, pp.522-530, 2010-08-10 (Released:2010-08-25)

参考文献数

23

被引用文献数

5 5

---

The Discrete Element Method (DEM) is widely used in computational granular dynamics. The DEM is a Lagrangian approach where individual particle is calculated based on the Newton's second law of motion. Hence, the DEM enables us to investigate the granular flow characteristics at the particle level. On the other hand, the DEM has a difficulty to be used in large-scale powder systems because the calculation cost becomes too expensive when the number of particles is huge. Consequently, we have developed a coarse grain modeling as a large scale model of the DEM. The coarse grain particle represents a group of original particles. The coarse grain model was applied in typical gas-solid and solid-liquid two phase flows. The cohesive force like the van der Waals force was not considered in these simulations. In the present study, the coarse grain model is evolved to simulate the cohesive particles by considering the interparticle van der Waals force. The adequacy of the coarse grain model is proved by comparing the simulation results of original particle system. It is shown that the coarse grain model considering the interparticle force can simulate the original particle behavior precisely.

著者

春田 正行

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.39, no.6, pp.433-440, 2002-06-10 (Released:2010-04-30)

参考文献数

7

著者

遠藤 禎行 向阪 保雄

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.33, no.1, pp.30-36, 1996-01-10 (Released:2010-04-30)

参考文献数

40

被引用文献数

2

著者

奥山 喜久夫 I. Wuled LENGGORO

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.37, no.10, pp.753-760, 2000-10-10 (Released:2010-04-30)

参考文献数

28

被引用文献数

6 5

著者

林 弘祐 笠野 俊彦 須原 清治

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.18, no.1, pp.3-10, 1981-01-10 (Released:2010-04-30)

参考文献数

8

---

The effect of the addition of light anhydrous silicic acid to potato starch powdes, which improves the lubricating characteristics of drug powders, is usually cancelled by the absorption of moisture. In order to improve this point, hydrophobic light anhydrous silicic acid was used, and prevention of the loss of the lubricating effect by moisture sorption was examined.1) Moisture sorption of the mixture of dry starch and silicic acid (0.1%) results in the increase of the apparent specific volume and angle of repose, and decrease of dispersibility, with the increase in water content. The resultant mixture shows powder characteristics close to that of starch, that is the lubricating effect of light anhydrous silicic acid is lost. When 0.1% hydrophobic silicic acid is added, its effect was almost the same as when added to moistened starch, and the lubricating effect of hydrophobic silicic acid was not lost due to moisture sorption by starch.2)Examination of such mixtures by a scanning electron microscope revealed that ordinary light anhydrous silicic acid stuck to starch granules that looked like the moistened thin paper to be stuck when light anhydrous silicic acid experienced moisture sorption, and light anhydrous silicic acid could not prevent the contact of the starch granules. This resulted in the reappearance of powder characteristics in starch itself. In the case of hydrophobic light anhydrous silicic acid, the particles do not stick to or fall from starch granules even after moisture sorption and remain attached sterically to the starch granules the same as after their addition, and prevent the contact of starch granules themselves. This is considered to be one of the reasons why hydrophobic light anhydrous silicic acid does not lose its lubricating effect.

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.44, no.11, pp.823-824, 2007-11-10 (Released:2010-04-30)

著者

山本 ひとみ 戸塚 裕一 内田 実 竹内 洋文

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.47, no.6, pp.388-393, 2010-06-10 (Released:2010-06-15)

参考文献数

7

被引用文献数

1 3

---

The lubricant property of sucrose esters of fatty acids (SEs) having different particle size and Hydrophile-Lipophile Balance (HLB) was evaluated with a model formulation in tableting. The binding tendency of the model formulation composed of isomalt powder was depressed by adding SEs in the formulation. Tablets containing SE showed faster disintegration time compared to those containing magnesium stearate or calcium stearate, while the tablets containing SEs indicated a high tensile strength. Milled SE (S-370F) exhibited better tablet properties than original SE (S-370). The SEs having different HLB showed different effects on the resultant tablet properties such as the magnitude of tensile strength, disintegration time, and spreading properties. The relatively hydrophilic SE was found to much improve the resultant disintegrating properties of tablet compared to magnesium stearate, calcium stearate and hydrophobic SEs. Consequently, SEs are able to use as lubricants on tablet formulation by appropriately controlling its particle size, content, and HLB.

著者

東畑 平一郎 関口 勲

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学研究会誌 (ISSN:18838766)

巻号頁・発行日

vol.7, no.2, pp.133-143, 1970-04-01 (Released:2010-08-10)

参考文献数

111

被引用文献数

1 1