NIPPON GOMU KYOKAISHI
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Volume 83, Issue 8
Displaying 1-9 of 9 articles from this issue
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Special Issue for General Reviews “Surroundings and Regulations of Rubber Industry”
Introductory Remarks
General Reviews
  • [title in Japanese]
    [in Japanese]
    2010 Volume 83 Issue 8 Pages 230-231
    Published: 2010
    Released on J-STAGE: February 15, 2011
    DOIhttps://doi.org/10.2324/gomu.83.230
    JOURNAL FREE ACCESS
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  • The Current Status on Work Accident in Rubber Industry and Its Challenge
    Tsuneo MIZUNO
    2010 Volume 83 Issue 8 Pages 232-237
    Published: 2010
    Released on J-STAGE: February 15, 2011
    DOIhttps://doi.org/10.2324/gomu.83.232
    JOURNAL FREE ACCESS
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    The severity rate of accident in rubber product manufacturing industry is higher than the average of all manufacturing industries. This is due to more frequent access to hazards that lead to heavy accidents than the other industries and to relative insufficiency of safeguard in the industry. Taking some examples of accident with automated facilities which are liable to heavy accidents in rubber product manufacturing industry, the typical characteristics of deficiency on safeguard and their backgrounds are examined.
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  • Latest Safety Device for Open Mill
    Yasuhiko TAKAGI
    2010 Volume 83 Issue 8 Pages 238-242
    Published: 2010
    Released on J-STAGE: February 15, 2011
    DOIhttps://doi.org/10.2324/gomu.83.238
    JOURNAL FREE ACCESS
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    In plastic and rubber industries, different sizes of open mill are used. In fact, biggest drawback in the use of open mill is that its operation is dangerous and its operating environment is bad. In this review, we introduce a latest safety device for mixing mill.
    Mechanical breaks and electrical breaks are generally known as safety devices for mixing mill. Especially mechanical breaks are widely used and sold recently. It’s necessary to take an official examination when we use any breaks other than the Fukuda type one. There is a regulation that switches for safety device like lever switches must be attached to the mill. Though manufacturers have made efforts to improve safety, industrial accidents happen occasionally.
    MK-break is a safety device spread in the market recently. It has LED sensors which detect only the wrist wearing a reflector. This is a patented product in the United States, Europe and Japan. In Japan, only one company has exclusive rights to manufacture and sell this product.
    If the wrist with a reflector gets into dangerous area, sensors detect it and an emergency break works. It’s also a good system that doesn’t allow workers to start the mill without confirming that all sensors work normally. It takes one day to install this break to any kind of mill.
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  • N-nitrosamine (TRGS 552)
    Mitsunori AOYAMA
    2010 Volume 83 Issue 8 Pages 243-246
    Published: 2010
    Released on J-STAGE: February 15, 2011
    DOIhttps://doi.org/10.2324/gomu.83.243
    JOURNAL FREE ACCESS
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    TRGS 552 in Germany regulates certain N-nitrosamine compounds in rubber articles.
    N-nitrosamines are carcinogenic substances produced by reaction between nitrogen oxides and amines.
    Amines for the rubber industry has been used as a raw material such as rubber accelerator, is essential for rubber materials.
    N-nitrosamines are not regulated in Japan, but the contents of TRGS 552 will be helpful to the rubber industry.
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  • Laws and Regulations Concerning Organic Rubber Chemicals
    Yoshio NAGAI
    2010 Volume 83 Issue 8 Pages 247-251
    Published: 2010
    Released on J-STAGE: February 15, 2011
    DOIhttps://doi.org/10.2324/gomu.83.247
    JOURNAL FREE ACCESS
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    Although varieties of organic rubber chemicals are used in the rubber industry, some of them are potentially harmful for human society and environment. In order to reduce such an environmental load caused by the release of chemical substances into the atmosphere, Japanese government has been establishing a series of laws and regulations concerning the manufacture, import, use and disposal of harmful chemical substances. These laws and regulations make the user of rubber chemicals easy to access the important information provided by the manufacturer concerning the hazards of the chemicals. As a result, users can make appropriate action for themselves and the environmental safety according to the individual circumstances.
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  • Impacts by a New European Chemical Regulation, REACH
    Yumi AKAHORI
    2010 Volume 83 Issue 8 Pages 252-257
    Published: 2010
    Released on J-STAGE: February 15, 2011
    DOIhttps://doi.org/10.2324/gomu.83.252
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    REACH is a new European regulation concerning the registration, evaluation, authorisation and restriction of chemicals. Although this is a European regulation, enterprises in non-EU community including Japanese industrial sectors that directly or indirectly export their products to EU region have also been faced to accommodate its requirements. One of the reasons of the non-EU community involvement is that some certain chemicals such as SVHC (Substances of Very High Concern) "in a product" are also scoped as the regulation and information about the use of such chemicals in a product are needed to be gathered. This can be, basically, achieved by communications among almost whole supply chain of the product including inside and outside of EU.
    This article will provide basic ideas of REACH and possible impacts by REACH to the circumstance surrounding rubber products.
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Regular Papers
  • Properties of Multiwall Carbon Nanotubes / Polystyrene-block-polybutadiene-block-polystyrene Composites
    Takahide KUMAGAI, Wataru SUZUKI, Eisuke YAMADA, Toru NOGUCHI, Satoshi ...
    2010 Volume 83 Issue 8 Pages 258-263
    Published: 2010
    Released on J-STAGE: February 15, 2011
    DOIhttps://doi.org/10.2324/gomu.83.258
    JOURNAL FREE ACCESS
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    The influence of characteristics of multiwall carbon nanotubes (MWCNTs) on the properties of polystyrene-block-polybutadiene-block-polystyrene (SBS) / MWCNT composites was investigated. The three types of MWCNTs which have a different in the degrees of graphitization (CNT-1; φ 87 nm, G/D ratio 9.09 and CNT-2; φ 87 nm, G/D ratio 0.78) and the diameter (CNT-3; φ 10-15 nm) were used as a filler. The composites were prepared using a mixing roll. The tensile moduli of the composites were improved even at low concentration of MWCNTs. The volume resistivity of the composite compounded with CNT-1 was markedly decreased at the lowest content of MWCNT, 4.4 vol%. The new peak of the loss tangent (tanδ) was observed around –10 °C in the temperature dependence of tanδ for the composites compounded with CNT-1. These results suggest that another relaxation system in SBS was newly formed by compounding CNT-1.
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Technical Note
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