ATMOSFERİK KOŞULLARDAKİ DEĞİŞİMİN BAZI DERİ FİZİKSEL ÖZELLİKLERİNE ETKİSİ

Year 2011, Volume: 21 Issue: 2, 194 - 198, 01.12.2011

Bahri Başaran Behzat Oral Bitlisli Buğra Ocak Ersin Önem

Abstract

Çalışmada, standart ve tropikal atmosfer koşullarında kondisyonlamanın bazı deri fiziksel özelliklerine etkisi incelenmiştir. Bu amaçla; giysilik koyun derileri TS EN ISO 2419’da önerilen 23 °C ± 2 °C sıcaklık, % 50 ± 5 nispi nemdeki standart atmosfer koşulları ve ISO/DIS 2419’da önerilen 27 °C ± 2 °C sıcaklık, % 65 ± 5 nispi nemdeki tropikal atmosfer koşullarında kondisyonlanmışlardır. Ardından bazı deri fiziksel özelliklerindeki değişimler istatistiksel olarak incelenmiştir. Araştırma sonuçlarına göre; standart atmosfer koşulunda kondisyonlanan koyun derilerinin uzama yüzdesi 53.47 ± 4.10, Young modülü 77.32 ± 23.34 N/mm, çift kenar yırtığı 38.03 ± 8.47 N, su buharı geçirgenliği 6.18 ± 0.55 mg/cm2.h olarak, tropikal atmosfer koşullarında ise derilerin uzama yüzdesi 57.67 ± 5.36, Young modülü 69.42 ± 13.87 N/mm, çift kenar yırtığı 43.06 ± 10.50 N, su buharı geçirgenliği 6.61 ± 0.47 mg/cm2.h olarak saptanmıştır. Bu fiziksel özellikler arasındaki farkın istatistiksel olarak önemli olduğu belirlenmiştir. Çekme mukavemeti ve tek kenar yırtığı değerlerindeki değişimin ise istatistiksel olarak önemli olmadığı tespit edilmiştir

Keywords

Deri, Sıcaklık, Nem, Kondisyonlama, Fiziksel özellikler

EFFECT OF DIFFERENT ATMOSPHERIC CONDITIONS ON SOME PHYSICAL PROPERTIES OF LEATHER

Abstract

In this study, the effect of conditioning under standard and tropical atmospheric conditions on physical properties of leather was investigated. For this purpose, garment sheep leathers were conditioned under standard atmospheric conditions of 23 °C ± 2 °C temperature and % 50 ± relative humidity suggested in TS EN ISO 2419, and under tropical atmospheric conditions of 27 °C ± 2 °C temperature and % 65 ± 5 relative humidity suggested in ISO/DIS 2419. Then, changes in leather physical properties were investigated statistically. According to results, for sheep leather conditioned under standard atmospheric conditions, percentage extension was 53.47 ± 4.10, Young’s modulus was 77.32 ± 23.34 N/mm, double edge tear load was 38.03 ± 8.47 N, water vapour permeability was 6.18 ± 0.55 mg/cm2.h, while under tropical atmospheric conditions, percentage extension was 57.67 ± 5.36, Young’s modulus was 69.42 ± 13.87 N/mm, double edge tear load was 43.06 ± 10.50 N, water vapour permeability was 6.61 ± 0.47 mg/cm2.h. The difference between these physical properties was determined to be statistically significant. Changes in tensile strength and single edge tear load were not significant

Keywords

Leather, Temperature, Humidity, Conditioning, Physical properties

References

• 1. Joyce, L.A., Blate, G.M., McNulty, S.G., Millar, C.I., Moser, S., Neilson, R.P., Peterson, D.L., 2009, “Managing for multiple resources under climate change”, Environmental Management, 44, 1022-1032.
• 2. Van den Besselaar, E.J.M., Klein Tank, A.M.G., van der Schrier, G., 2010, “Influence of circulation types on temperature extremes in Europe”, Theoretical and Applied Climatology, 99, 431-439.
• 3. Osterkamp, T.E., Jorgenson, M.T., Schuur, E.A.G., Shur, Y.L., Kanevskiy, M.Z., Vogel, J.G., Tumskoy, V.E., 2009, “Physical and ecological changes associated with warming permafrost and thermokarst in interior Alaska”, Permafrost and Periglacial Processes, 20, 235-256.
• 4. Ahrens, C.D., 1994, Meteorology today, An introduction to weather, climate and the environment, Fifth edition, West publishing company, USA.
• 5. Urbanija, V., Gersak, J., 2004, “Impact of the mechanical properties of nappa clothing leather on the characteristics of its use”, Journal of the Society of Leather Technologists and Chemists, 88, 181-190.
• 6. Jankauskaite, V., Strazdiene, E., Laukaitiene, A., 2006, “Stress distribution in polymeric film laminated leather under biaxial loading”, Proc. Estonian Acad. Sci. Eng., 12(2), 111-124.
• 7. Tuckermann, M., Mertig, M., Pompe, W., 2001, “Stress measurements on chrome-tanned leather”, Journal of Materials Science, 36, 1789-1799.
• 8. Liu, C.K., Latona, N.P., Ashby, R., Ding, K., 2006, “Environmental effects on chrome-free leather”, Journal of the American Leather Chemists Association, 101, 368-375.
• 9. Milasiene, D., 2007, “Effect of environment temperature on fatigue properties of laminated leather”, Mechanika, 6(68), 45-48.
• 10. Yıldırım, K., Goksel, F., Ogan, N., Gucer, S., 2009, “Ageing behavior of automotive leathers”, I. International Leather Engineering Symposium-Proceedings, İzmir, 205-214.
• 11. TS EN ISO 2419, 2006, “Physical and mechanical tests - Sample preparation and conditioning”, Turkish Standards Institution, Ankara, 6 p.
• 12. ISO/DIS 2419, 2006, “Physical and mechanical tests - Sample preparation and conditioning”, International Organization for Standardization, 3 p.
• 13. TS EN ISO 2418, 2006, “Chemical, physical and mechanical and fastness tests - Sampling location”, Turkish Standards Institution, Ankara, 11 p.
• 14. TS 4117 EN ISO 2589, 2006, “Physical and mechanical tests - Determination of thickness”, Turkish Standards Institution, Ankara, 7 p.
• 15. TS 4118-1 EN ISO 3377-1, 2005, “Physical and mechanical tests; Determination of tear load - Part 1: Single edge tear”, Turkish Standards Institution, Ankara, 8 p.
• 16. TS 4118-2 EN ISO 3377-2, 2005, “Physical and mechanical tests; Determination of tear load - Part 2: Double edge tear”, Turkish Standards Institution, Ankara, 7 p.
• 17. TS 4119 EN ISO 3376, 2006, “Physical and mechanical tests - Determination of tensile strength and percentage extention”, Turkish Standards Institution, Ankara, 9 p.
• 18. TS EN ISO 14268, 2004, “Physical and mechanical tests - Determination of water vapour permeability”, Turkish Standards Institution, Ankara, 16 p.
• 19. Liu, C.K., Latona, N.P., Dimaio, G.L., 2002, “Effects of fatliqour on vacuum drying of leather”, Journal of American Leather Chemists Association, 97, 284-293.
• 20. Thanikaivelan, P., Shelly, D.C., “Ramkumar S.S., 2006, “Gauge length effect on the tensile properties of leather”, Journal of Applied Polymer Science, 101, 1202-1209.
• 21. Heidemann, E., 1993, Fundamentals of leather manufacturing, Eduard Roether KG Druckerei und Verlag, Darmstad, 647 p.