Production of sponge rubber for monolayer rubber stamp using salt leaching method

Authors

  • Wimonrat Trakanpruk Faculty of Science, Chulalongkorn University
  • Yupaporn Rodthong Faculty of Science, Chulalongkorn University

Keywords:

Open cell, sponge rubber, NBR, soluble salt

Abstract

Sponge rubber used for monolayer rubber stamp was produced from nitrile butadiene rubber (NBR). Open cells in sponge rubber were created using salt leaching method. Effect of size and amount of sodium chloride which was used as a water soluble salt on the creation of open cells in the rubber was investigated. Carbon black was used as a filler. A different type of surfactant was added to increase the leaching out of salt from the rubber. Cure characteristics of the compound rubbers: maximum torque, minimum torque, scorch time and cure time as well as hardness of the prepared sponge rubber were determined. Morphology of the produced sponge rubber by scanning electron micrographs displayed interconnecting open cells. The monolayer sponge rubber assembled in rubber stamp had high oil ink absorption and gave clear imprint.

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References

Kazumi, G. and Hiroshi, S. 1995. Process for producing sponge rubber stamp having open cell. United States Patent 5397417: 1.

Takaji, F., Kitatakasho-machi, Nishi-ku, Nagoya-shi and Aichi-ken, J. P. 1980. Process for preparing open-cell sponge rubber printing material having small and large interconnected cells. United States Patent 4212839: 1.

Kazumi, G. and Shigehiro, S. 1997. Porous rubber stamp material having open cells. United States Patent 5620777: 1.

Ishikawa, H., Kawatsu, M. and Nakane, T. 1996. Sponge rubber printing body with open cell foam. Japan patent 08-230295: 1.

Uchida, K., Sasaki, H. and Yamada, S. 1994. Open-cell sponge rubber and production of its base. Japan patent 06-107865: 1.

Bandyopadhyay, S., De, P.P., Tripathy, D.K. and De, S.K. 1996. Influence of surface oxidation of carbon black on its interaction with nitrile rubbers. Polymer. 37: 353.

Wang, M. J., Wolff, S. and Donnet, J. B. 1991. Filler-elastomer interactions. Rubber Chem. Technol. 64 : 559-76.

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Published

2017-04-23

How to Cite

[1]
W. . Trakanpruk and Y. . Rodthong, “Production of sponge rubber for monolayer rubber stamp using salt leaching method”, J Met Mater Miner, vol. 18, no. 2, Apr. 2017.

Issue

Vol. 18 No. 2 (2008)

Section

Original Research Articles

License

Copyright (c) 2017 Journal of Metals, Materials and Minerals

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