Impact absorbing kneepad prepared from natural rubber
| Autor: | E. Kalkornsurapranee, N. Lehman, Pornsiri Kaewpradit, A. Kongchoo, P. Chonlathan |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 773:012063 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/773/1/012063 |
| Popis: | This research aims to develop an impact absorbing material prepared from natural rubber, in order to encourage the competition of Thailand in the global market as well as add the rubber values. The material has been prepared by impregnating natural rubber foam with the dilatant fluid. Experimental results show that the prototype of knee guard impregnated with the proposed dilatant (NRI) gives good shock impact absorbing performance (higher than 5, 000 N). This shows 20 – 30% higher performance than the prototype with the conventional dilatant. In other words, the NRI and the commercial knee guard have transmission force < 2, 300 N with CV 1.1% and 1.5% respectively. Considering international impact protection standards, the test results have shown that the NRI is corresponding with level 2 class C of the protection standard for roller sports (EN 14120:2003) with the transmission force < 6, 000 N. It is also coincident with the protection standard for Motorcyclist’ protective clothing against mechanical impact (EN 1621-1:2010) with the transmission force < 35, 000 N. In addition, the impact absorbing material prepared from natural rubber has performance within level 1 of EN 1621-2:2003 standard (peak transmission force < 18, 000 N), but the commercial knee guard passes level 2 of EN 1621-2:2003 standard (peak transmission force < 9, 000 N). It can be seen that the performance of the natural material is comparable with the commercial one, it also has lower manufacturing cost than 300 THB/piece while the commercial has sale cost of 2, 500 THB/piece. |
| Databáze: | OpenAIRE |
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