The Influence of Potassium Borohydride (KBH4) On Kraft Pulp Properties of Maritime Pine

Abstract

In this study, the effects of potassium borohydride (KBH₄) on maritime pine (Pinus pinaster Ait.) kraft pulp and paper properties were investigated. 0.5%, 1%, 1.5%, and 2% (based on oven-dried wood) KBH₄ added kraft cookings were carried out under the fixed cooking conditions. KBH₄-free kraft cooking was also done as control cooking. The results revealed that pulp yield, kappa number, and beating time increased with addition of KBH₄ to cooking liquor. The screened yield increased 7.69 point (from 46,21% to 53.90%) with 2% KBH₄ addition to control cooking. The brightness values of handsheets were increased with KBH₄ addition. Strength properties of handsheets significantly decreased with addition of KBH₄.

Keywords

• Kraft,Potassium borohydride,Pulp yield,Paper strength,Maritime pine

Sahil Çamı Kraft Hamuru Ve Kâğıdının Özellikleri Üzerine Potasyum Bor hidrürün (KBH4) Etkisi

Öz

Bu çalışmada, sahil çamından (Pinus pinaster Ait.) elde edilen kraft kağıt hamuru ve kağıtlarının özellikleri üzerine potasyum borhidrürün (KBH₄) etkileri araştırılmıştır. %0,5, %1, %1,5, ve %2 (fırın kurusu oduna göre) oranında KBH₄ pişirme çözeltisine ilave edilerek sabit pişirme koşulları altında Kraft pişirmeleri yapılmıştır. Ayrıca, KBH₄ ilavesiz kraft pişirmesi kontrol pişirmesi olarak yapılmıştır. Pişirme çözeltisine KBH₄ ilavesinin kağıt hamurunun verimi ve kappa numarası ile hamurların dövme sürelerini artırdığı sonucuna varılmıştır. Kontrol pişirmesine %2 KBH₄ ilave edildiğinde elenmiş verim 7,69 puan (%46,21’den %53,90’a) artmıştır. KBH₄ ilavesi ile kağıtların parlaklık değerleri artmıştır. Kağıtların sağlamlık özellikleri KBH₄ ilavesi ile önemli ölçüde azalmıştır.

Anahtar Kelimeler

• Kraft,Potasyum borhidrür,Kağıt hamuru verimi,Kağıt sağlamlığı,Sahil çamı

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