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Volume 58, Issue 4
Displaying 1-8 of 8 articles from this issue
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[in Japanese]1985 Volume 58 Issue 4 Pages 217-223
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (510K) -
[in Japanese]1985 Volume 58 Issue 4 Pages 224-231
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (519K) -
[in Japanese]1985 Volume 58 Issue 4 Pages 232-239
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (554K) -
HALOGENATED BUTYL RUBBER ADHESIVES CROSSLINKED WITH SILANE COUPLING AGENTSTadao MATSUO, Masanori KAKEHI, Sadamu IKEDA, Tsunetaka MATSUMOTO, Shin ...1985 Volume 58 Issue 4 Pages 240-247
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSBy using the cross-linking reaction of halogenated butyl rubber (X-IIR) and silane coupling agents (SCA), practical adhesives are evaluated by measuring the peel strength between vulcanized EPDM sheet. Cross-linking reaction was observed even in the presence of practical additives and fillers for adhesives. Adhesives based on Br-IIR showed 4KN/m, but when the degree of cross-linking goes higher, the peel strength became lower. Adhesives based on Cl-IIR showed lower peel strength than Br-IIR based one. The addition of powdered calcium oxide is more effective than to use dried fillers to minimize the effect of water in fillers on cross-linking reaction.View full abstractDownload PDF (401K) -
Tadaoki OKUMOTO, Masayoshi ICHIKAWA, Kiyomitsu TERASHIMA1985 Volume 58 Issue 4 Pages 248-257
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSThe rubber used in the fuel line is expexted to be improved in its performance concerning with the heat aging, sour gasoline and alcohol containing gasoline (gasohol) resistance. One of the best materials to fulfill these conditions mentioned above is fluoroelastomer. In most commercially available fluoroelastomers (FKM), the highly fluorinated polymers consisting of terpolymer of vinylidenefluoride and hexafluoropropylene with tetrafluoroetylene have superior properties to gasohol containing methanol.
Although the high fluorine content FKM cured by peroxide has the superior properties used in fuel line, it is weak to cut growth properties as the materials for tube of fuel hose. Concerning to improve the above properties of peroxide curable FKM, we examined the adding effect of various coagents on cut growth (break-down time). Among various kinds of di-and trifunctional coagent we determined to use the trifunctional coagent such as triallylisocyanurate (TAIC) and triallyltrimellitate (TATM) which showed the superior physical characteristics of oil resistant rubber. In this report, fundamental studies were made for the relations between physical properties such as the compression set and cut growth (break-down time) by changing the peroxide and coagent content by using TAIC and TATM. By using these coagent, the property of cut growth was improved by decreasing the content of coagent. Especially, we recognized to obtain the excellent cut growth properties with maintaining the compression set resistance by using the new coagents TATM.View full abstractDownload PDF (647K) -
SEIJI Yamajo, TADASHI Yokoyama, HITOSHI Ishikawa1985 Volume 58 Issue 4 Pages 258-265
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSSealing rings on sterntube seal are often injured due to the abrasion and blister since the sterntube seal is different from the other seals of machines on the point that sea water is sealed by the sterntube seal. In order to know the characteristics of material (Fluoroelastmer) of sealing rings to the abrasion and blister, an experimental study has been carried out and the test result for the abrasion is reported in this paper.
Large size fillers were supposed to affect the characteristics of Fluoroelastmer compounds against the abrasion through the investigation of sealing rings which were seriously injured due to the abrasion in service. Many kinds of sealing ring were manufactured; large size fillers were added in some rings and only small size fillers were added in the other rings.
It was found from the test of sealing rings that the large size fillers are effective to improve the performance against the abrasion. It was also found from the simple abrasion test of rubber sheet and block that the performance of sealing rings against abrasion can not be presumed by the simple test.View full abstractDownload PDF (667K) -
SEIJI Yamajo, TADASHI Yokoyama, HITOSHI Ishikawa1985 Volume 58 Issue 4 Pages 266-275
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSBlister is the most serious problem for the sealing ring on sterntube seal and an experimental study has been carried out to know a relation between the blister and the material (Fluoroelastomer) of sealing rings. It is difficult to cause blisters on sealing rings repeatedly under the same test condition. Accordingly various kinds of test were carried out to investigate the relation between the material of sealing rings and phenomena which seem to connect with the blister.
The change of physical properties after high temperature water test was examined since the blister is closely related to the existence of water. Then properties of rubber to a crack was examined based on the idea that the blister is a kind of crack. When fillers in the rubber is dissolved in water, the trace of dissolved fillers might become a core of blister. The dissolution of fillers were examined with test pieces of disk shape. The followings were found from these tests; Blister breaks out due to the excessive curing, Calcium oxide is effective to prevent the swelling by the catch of HF during the postcure and fillers near the stressed part is easily dissolved by hot water and the trace of dissolved fillers might become the blister.View full abstractDownload PDF (806K) -
1985 Volume 58 Issue 4 Pages 276-277
Published: 1985
Released on J-STAGE: April 16, 2008
JOURNAL RESTRICTED ACCESSDownload PDF (213K)
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