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Volume 41, Issue 4
Displaying 1-8 of 8 articles from this issue
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SHOEI FUJISHIGE1985 Volume 41 Issue 4 Pages P105-P113
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
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NAOKI MORIMURA1985 Volume 41 Issue 4 Pages P114-P119
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
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SACHIO NAITO, ITOMI HOMMA1985 Volume 41 Issue 4 Pages P120-P126
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
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[I] RELATION BETWEEN PROCESS CONDITION AND FILM PHYSICAL PROPERTIESToshitaka Kanai, Masakatsu Kimura, Jiro Shimizu1985 Volume 41 Issue 4 Pages T139-T150
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSWe investigated the relationship between process conditions and physical properties of the wide-thick HDPE films. The wider and/or the thicker HDPE film yielded under the same out-put rate, the lower the physical properties. Elevation of process temperature and temperature rise of resin due to the heat generated by viscous energy dissipation resulted to the insufficient stretching effect and the inferior physical properties.
In order to understand the relation between physical properties and process conditions, we observed melt behavior during the tubular film process. It was found that the deformation rate and elongational viscosity were very important factors for the stretching effect. The magnitude of stretching stress at the region from the uppermost of the bubble neck to the frost line level was closely related to the physical properties. The above results imply that the high strength HDPE films can be processed by keeping the stretching stress high; high out-out rate, high take-up speed, and low temperature by reducing the heat generated by viscous dissipation. We realized that measurement of deformation rate during the tubular film process is very important to control the film properties.View full abstractDownload PDF (816K) -
Saburo Matsukawa, Munenori Sakamoto, Hiroaki Tonami1985 Volume 41 Issue 4 Pages T151-T155
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSVarious types of combined formaldehyde (such as N-CH2OCH2-N, N-CH2-N, etc.) in the condensates of trimethoxymethylmelamine (TM3) or the reaction products of TM3 with rayon cellulose or with glucose were quantitated by the analysis of their acid hydrolysis behaviour.
Zn(NO3)2 was effective to promote the formation of N-CH2-N bridges between TM3 molecules but Zn(CH3CO2)2 and MgCl2 were ineffective.
Formation of N-CH2-N bridges between TM3 molecules was depressed more profoundly when TM3 was treated with glucose than with cellulose.View full abstractDownload PDF (358K) -
Munenori Sakamoto, Munehiro Wakabayashi, Natsuko Kohara1985 Volume 41 Issue 4 Pages T156-T163
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIn order to identify the reaction products of protein fibers with alkyl glycidyl ethers, amino acids in the hydrolyzates of the silk fibers treated with methyl, ethyl, isopropyl and allyl glycidyl ethers (MGE, EGE, IPRGE and AGE, respectively) and of the wool fibers treated with MGE were analyzed by gas chromatography-mass spectrometry on an OV-17 column, after converted to their butyl esters of N(O)-trifluoroacetyl derivatives. The ether linkages of the adducts of alkyl glycidyl ethers with tyrosine residues were cleaved easily in 6 N HCl, and O-(dihydroxypropyl) tyrosine and O-(chlorohydroxypropyl) tyrosine were resulted. These two were the only identified products when hydrolysis was carried out at 110°C for 24hr. The adducts of MGE, EGE and IPRGE with tyrosine were identified in the hydrolyzates of the corresponding samples when hydrolysis was carried out at 100°C for a shorter time. However, the adduct of AGE with tyrosine was not detected even when hydrolysis was carried out under such milder conditions. Nε-(Dihydroxypropyl)-Nε-(hydroxymethoxypropyl) lysine, an intermediate for conversion of Nε, Nε-bis(hydroxymethoxypropyl) lysine [(MGE)2-Lys] into Nε, Nε-bis (dihydroxypropyl) lysine (G2-Lys) during hydrolysis, was identified in the hydrolyzate of MGE-treated wool, which was obtained under mild conditions, in addition to (MGE)2-Lys, G2-Lys and Nε-(hydroxymethoxypropyl) lysine.View full abstractDownload PDF (490K) -
Takeo Sone, Yuki Nakai, Takashi Yamazaki, Seigo Ooya1985 Volume 41 Issue 4 Pages T164-T172
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSSilk has an acidic, basic and hydrophobic groups, so that it may be dyeable by heat-transfer printing with cationic or disperse dyes.
To obtain fundamental and theoretical information regarding dyes and dyeing conditions for silk or mixed yarn fabrics composed of silk and synthetic fibers, an attempt was made to investigate the dyeing of silk with cationic dyes.
The conclusions obtained are summarized as follows: 1. According to the thermodynamical interpretation, the binding force of a cationic dye, C. I. Basic Red 18, to silk is smaller than that of a levelling dye, C. I. Acid Orange 7.
2. Van der Waals and hydrophobic interactions, besides ionic one, seems to be operative in the adsorption of the cationic dye.
3. Dyeing rate is influenced greatly by pH of the dye bath, so that the pH values must be kept at constant values to obtain the stable and reproducible dyeing.
4. The fastness to sunlight was the highest with blue color dyes having anthraquinone chemical structure as compared to those having other chemical structures. Red color dyes except for an insulation type azo dye, C. I. Basic Red 18 do not show good fastness.
Almost all yellow dyes examined show good fastness for the practical use.
5. In regard to the fastness to the washing, the fastness of the dyes to dry cleaning seems to be fast enough for practical use, but those to water or the washing are not sufficiently high as almost in the same level with that of levelling acid dyes.View full abstractDownload PDF (599K) -
Yoshiharu Nakamura, Yasuhiko Obata, Yoshitaka Saito, Shigeru Kunugi1985 Volume 41 Issue 4 Pages T173-T177
Published: April 10, 1985
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSA new method for a preparation of asymmetric charged polymer membranes by use of electric field is successfully applied to a system composed of acrylamide and methacrylic acid. The membrane obtained under +7000V has considerable asymmetry in the charge distribution of its vertical crosssection and in the membrane potential. A possible application of the method is inferred.View full abstractDownload PDF (1772K)
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