Atık Soyma Kaplama Levhalarının Hibrit Yongalevha Üretiminde Değerlendirilmesi

Öz

Bu çalışmada atık soyma kaplama levhaları kullanılarak üretilen yongalevhaların fiziksel, mekanik özellikleri ve formaldehit emisyonu incelenmiştir. Yapılan çalışmalarda, yongalevha üretiminde atık kaplama kullanılması formaldehit emisyonunu azaltmıştır. En yüksek formaldehit emisyonu değerleri kontrol grubundan elde edilirken (9.35 mg/100g), en düşük değerler tutkalsız ve birbirine dik üç adet kaplama kullanılan levha grubundan (7.08 mg/100g) elde edilmiştir. Yongalevhaların su alma oranı ve kalınlık artışı oranları kaplama ilavesi ile iyileşmiştir. En yüksek kalınlık artımı ve su alma değerleri kontrol grubundan elde edilmiştir (sırasıyla %35.10 ve %82.39). En düşük kalınlık artımı ve su alma değerleri ise birbirine dik üç adet tutkallı kaplama kullanılan levha grubundan elde edilmiştir (sırasıyla %23.03 ve %60.56). Yongalevha üretiminde atık kaplama sayısının artması ile yongalevhanın kalite özellikleri iyileşmiştir. Eğilme direnci (en düşük ve en yüksek değerler sırasıyla G: 14.98 N/mm2 ve B: 12.61 N/mm2) ve eğilmede elastikiyet modülü (en düşük ve en yüksek değerler sırasıyla G: 1671.95 N/mm2 ve B: 2118.85 N/mm2) değerleri sadece orta tabakaya kaplama ilavesi ile değişmemiştir. Yüzeye dik çekme direnci orta tabakaya tutkalsız kaplama ilavesi ile azalırken, kaplamalara tutkal sürülmesi ise direnç değerlerini değiştirmemiştir (en düşük ve en yüksek yüzeye dik çekme direnci değerleri sırasıyla B: 0.239 N/mm2 ve F: 0.583 N/mm2). Yüzey ve orta tabakalar arasına kaplama ilavesi kalite özelliklerini olumlu yönde etkilemiştir. Sonuçlar, atık soyma kaplama levhalarının kullanımının yongalevha özelliklerini geliştirici katkı yaptığını ve üretimde kullanabileceğini göstermiştir.

Anahtar Kelimeler

• Yongalevha
• Formaldehit emisyonu
• soyma kaplama
• fiziko-mekanik özellikler

Evaluation of Waste Peeling Veneer Boards in Hybrid Particleboard Production

Öz

This study examined the physical and mechanical properties, as well as the formaldehyde emission, of particleboards produced using waste-peeling veneer. The studies showed that waste veneers in particleboard production reduced formaldehyde emissions. The highest formaldehyde emission values were obtained from the control group (9.35 mg/100g), while the lowest values were obtained from the board group (7.08 mg/100g) without glue and with three perpendicular veneers. Adding veneers improved the water absorption rate and thickness swelling rate of the particleboards. The highest values of thickness swelling and water absorption were obtained from the control group (35.10% and 82.39%, respectively). The lowest thickness swelling and water absorption values were obtained from the board group, which used three perpendicular glued veneers (23.03% and 60.56%, respectively). Increasing the number of waste veneers used in particleboard production enhanced all quality properties of the particleboard. The modulus of rupture (lowest and highest values for G: 14.98 N/mm² and B: 12.61 N/mm², respectively) and modulus of elasticity (lowest and highest values for G: 1671.95 N/mm² and B: 2118.85 N/mm², respectively) values did not change significantly with the addition of veneer to the middle layer. The internal bond strength decreased with the addition of glueless veneer to the middle layer. In contrast, the application of glue to the veneers did not alter the resistance values (lowest and highest values for B: 0.239 N/mm² and F: 0.583 N/mm², respectively). The inclusion of veneers between the surface and core layers had a positive effect on quality characteristics. The results showed that using waste-peeling veneer sheets improves particleboard properties and can be used in production.

Anahtar Kelimeler

• Particleboard
• Formaldehyde emission
• Peel veneer
• Physico-mechanical properties

Kaynakça

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