Determination of thermal, physical, optical and mechanical properties of waste papers prepared by adding Firetex

Öz

In the study, mechanical pulp-based (newspaper) papers were used as raw material and water-based Firetex (stone water) commercial product was used as fire retardant. Waste papers were refibrilled in the pulper and recycled with the rapid-köthen machine. Firetex was applied to the papers at 25%, 50%, 75% and 100% concentrations by immersing method. The thermal, mechanical and optical properties of the test papers produced within the scope of the study were measured and optimized. In the study, as a result of the thermogravimetric (TGA) analyzes of the test samples, it was determined that the carbonization and residue amount increased significantly with the increased Firetex ratio. It was determined that the limit oxygen index (LOI) values ​​of the samples also increased with the increasing Firetex ratio, the LOI value of 26 accepted as the standard with 50% concentration was exceeded, and the device limits were exceeded in the samples treated with 100% fire retardant. It has been determined that the increased Firetex ratio improves the resistance against burning, while reducing the tensile and tearing resistance. As a result of the study, when the LOI and strength values ​​are considered together, the most suitable Firetex concentration for waste newspaper is determined as 50%.

Anahtar Kelimeler

• Waste paper
• Firetex
• thermogravimetric analysis
• limited oxygen index

Firetex ilave edilerek hazırlanmış atık kağıtların termal, fiziksel, optik ve mekanik özelliklerinin belirlenmesi

Öz

Çalışmada hammadde olarak mekanik hamur bazlı teksir (gazete) kağıtları, yangın geciktirici olarak su bazlı Firetex (taş suyu) ticari ürünü kullanılmıştır. Teksir kağıtları çalışma öncesi hamurlaştırıcıda açılmış ve rapid-köthen makinesi ile tekrar kağıt haline dönüştürülmüştür. Firetex, kağıtlara daldırma yöntemi ile %25, %50, %75 ve %100 konsantrasyonlarda uygulanmıştır. Çalışma kapsamında üretilen test kağıtlarının termal, sağlamlık ve optik özellikleri ölçülmüş ve optimizasyonu gerçekleştirilmiştir. Çalışmada test örneklerinin termogravimetrik (TGA) analizleri sonucunda artırılan Firetex oranı ile kömürleşmenin ve kalıntı miktarının önemli ölçüde artış gösterdiği tespit edilmiştir. Örneklerin limit oksijen indeksi (LOI) değerlerinin de artırılan Firetex oranı ile arttığı, %50’lik konsantrasyon ile standart kabul edilen 26 LOI değerinin aşıldığı, %100 yangın geciktirici ile işlem gören örneklerde cihaz limitlerinin aşıldığı tespit edilmiştir. Artırılan Firetex oranı yanmaya karşı direnci geliştirirken kopma ve yırtılma direncini düşürdüğü tespit edilmiştir. Çalışma sonucunda LOI ve sağlamlık değerleri birlikte düşünüldüğünde atık gazete kağıtları için en uygun Firetex konsantrasyonu %50 olarak belirlenmiştir.

Anahtar Kelimeler

• Atık kağıt
• Firetex
• termogravimetrik analiz
• limit oksijen indeksi

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