Kavak kaplamalardan alternatif kontrplak üretimi
Küçük Resim Yok
Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Bursa Teknik Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Bu çalışmada, I-77/51 kavak soyma kaplamaları kullanılarak alternatif kontrplak üretmek ve üretilen malzemenin fiziksel ve mekanik özellikleri üzerine etkilerini araştırmaktır. Araştırma kapsamında, FF tutkalı kullanılarak 7, 9 ve 11 katlı levhalar üretilmiştir. Üretilen levhaların pres basıncı 8 kg/cm2 ve pres sıcaklığı 125 °C sabit tutularak presleme süresi ise yaklaşık olarak 1 mm/dk olarak belirlenmiştir. Levha taslağı hazırlanırken; 7 katlı levhalar için;7 katlı kontrplak,7 katlı alternatif kontrplak ve 7 katlı KTK 3 farklı levha, 9 katlı levhalar için; 9 katlı kontrplak, 9 katlı alternatif kontrplak-I, 9 katlı alternatif kontrplak-II ve 9 katlı KTK 4 farklı levha, 11 katlı levhalar için ise; 11 katlı kontrplak, 11 katlı alternatif kontrplak ve 11 katlı KTK 3 farklı levha olacak şekilde, 10 farklı levhada kaplama yönlendirme kombinasyon çalışması yapılmıştır. Üretilen levhaların fiziksel özelliklerinden yoğunluğu TS EN 323 (1999), su alma miktarının belirlenmesi TS EN 317 (1999), kalınlık artımlarının belirlenmesi TS EN 317 (1999; mekanik özelliklerinden eğilme direnci testleri TS EN 310 (2010), elastikiyet modülü TS EN 310 (2010) ve yapışma direnci TS EN 314-1 (1998) standardına göre belirlenmiştir. Levha gruplarında yoğunluğu en yüksek 9 katlı alternatif kontrplak-I'de 0,51 kg/cm3, pres süresi armasıyla levhaların yoğunluğu artmıştır. Su alma 2 saatte en az 7 KTK, 24-48-72-96-120 saate 9 katlı alternatif kontrplak-I, deney numunelerinin su alma sonuçlarına bakıldığında birbirinin yerine kullanılabileceğini gösterir. Kalınlığına şişme 2 saatte en az 11 KTK, 24-48-72-96-120 saate 7 KTK en az sonuçlar vermiştir. Su alma değerleriyle paralellik göstermektedir. Levhaların mekanik özellik sonuçları ise eğilme direnci ve elastikiyet modülü levhalarda kaplamaların paralel yönde yönlendirme sayısının armasıyla artığı elde edilmiş ve en yüksek değerler 7-9-11 katlı KTK'lerde bulunmuştur. Bu kombinasyonlarda en yüksek yapışma direnci değeri ise 9 KTK'de belirlenmiştir. Elde edilen test sonuçlarına göre; alternatif kontrplak mekanik özellikler bakımından kontrplaktan daha yüksek KTK'ye ise daha yakın değerler verdiği görülmüştür. FF tutkalı ile üretildiğinden rutubetli ve dış kullanım alanlarında tutkal türü açısından önerilmektedir.
This study aims to produce alternative plywood using I-77/51 poplar rotary-cut veneers and investigate their effects on the physical and mechanical properties of the produced material. In this study, 7, 9, and 11-ply boards were produced using FF glue. Press pressure was maintained at 8 kg/cm² and the press temperature was maintained at 125°C, with a pressing time of approximately 1 mm/min. While preparing the board draft, for 7-ply boards; 7-ply plywood, 7-ply alternative plywood and 7-ply KTK 3 different boards; for 9-ply boards; 9-ply plywood, 9-ply alternative plywood-I, 9-ply alternative plywood-II and 9-ply KTK 4 different boards; for 11-ply boards; 11-ply plywood, 11-ply alternative plywood and 11-ply KTK 3 different boards, thus veneer orientation combination studies were carried out on 10 different boards. The physical properties of the produced boards were determined according to the density TS EN 323 (1999), the determination of the amount of water intake TS EN 317 (1999), the determination of the thickness increments TS EN 317 (1999); the mechanical properties were determined according to the bending strength tests TS EN 310 (2010), the elasticity modulus TS EN 310 (2010) and the adhesion resistance TS EN 314-1 (1998) standards. Among the board groups, the highest density was 0.51 kg/cm3 for 9-ply alternative plywood-I. The density of the boards increased with increasing pressing time. Water uptake was at least 7 KTK in 2 hours, and 24-48-72-96-120 hours for 9-ply alternative plywood-I. The water uptake results of the test samples indicate that they can be used interchangeably. Thickness swelling was at least 11 KTK in 2 hours, and 7 KTK in 24-48-72-96-120 hours. This is consistent with the water uptake values. The mechanical properties of the boards showed that bending strength and modulus of elasticity increased with increasing the number of parallel orientations of the veneers, with the highest values found in 7, 9, and 11-ply KTK. The highest bonding strength value in these combinations was determined in 9-ply KTK. The test results indicated that alternative plywood exhibited higher mechanical properties than plywood and values closer to KTK. Because it is produced with FF glue, it is recommended for humid and outdoor use.
This study aims to produce alternative plywood using I-77/51 poplar rotary-cut veneers and investigate their effects on the physical and mechanical properties of the produced material. In this study, 7, 9, and 11-ply boards were produced using FF glue. Press pressure was maintained at 8 kg/cm² and the press temperature was maintained at 125°C, with a pressing time of approximately 1 mm/min. While preparing the board draft, for 7-ply boards; 7-ply plywood, 7-ply alternative plywood and 7-ply KTK 3 different boards; for 9-ply boards; 9-ply plywood, 9-ply alternative plywood-I, 9-ply alternative plywood-II and 9-ply KTK 4 different boards; for 11-ply boards; 11-ply plywood, 11-ply alternative plywood and 11-ply KTK 3 different boards, thus veneer orientation combination studies were carried out on 10 different boards. The physical properties of the produced boards were determined according to the density TS EN 323 (1999), the determination of the amount of water intake TS EN 317 (1999), the determination of the thickness increments TS EN 317 (1999); the mechanical properties were determined according to the bending strength tests TS EN 310 (2010), the elasticity modulus TS EN 310 (2010) and the adhesion resistance TS EN 314-1 (1998) standards. Among the board groups, the highest density was 0.51 kg/cm3 for 9-ply alternative plywood-I. The density of the boards increased with increasing pressing time. Water uptake was at least 7 KTK in 2 hours, and 24-48-72-96-120 hours for 9-ply alternative plywood-I. The water uptake results of the test samples indicate that they can be used interchangeably. Thickness swelling was at least 11 KTK in 2 hours, and 7 KTK in 24-48-72-96-120 hours. This is consistent with the water uptake values. The mechanical properties of the boards showed that bending strength and modulus of elasticity increased with increasing the number of parallel orientations of the veneers, with the highest values found in 7, 9, and 11-ply KTK. The highest bonding strength value in these combinations was determined in 9-ply KTK. The test results indicated that alternative plywood exhibited higher mechanical properties than plywood and values closer to KTK. Because it is produced with FF glue, it is recommended for humid and outdoor use.
Açıklama
07.02.2026 tarihine kadar kullanımı yazar tarafından kısıtlanmıştır.
Anahtar Kelimeler
Ormancılık ve Orman Mühendisliği, Forestry and Forest Engineering
