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A PRELIMINARY STUDY OF MALAYSIAN WOOD WASTES AS SECONDARY RAW MATERIAL FOR PULPING

I. Rushdan
Journal of Tropical Forest Science
Vol. 18, No. 3 (July 2006), pp. 149-156
Stable URL: http://www.jstor.org/stable/43594666
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A PRELIMINARY STUDY OF MALAYSIAN WOOD WASTES AS SECONDARY RAW MATERIAL FOR PULPING
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Abstract

In this work, we used waste wood from three Malaysian tropical hardwoods to understand the effects of species on the size of chips and pulp properties. The three species were kekatong (Cynometra spp.), merbatu (Parinari oblongifolia) and nyatoh (Madhuca launfolia), categorized as heavy, medium and light hardwoods respectively. Results showed that wood species had an effect on the distribution of size of chips and on the quantity of chips accepted for kraft pulping. Wood species and chip size had an effect on pulp yield and properties. Screened yield increased as the wood density decreased and kappa number increased as wood density increased. The effects on pulp properties varied depending on wood species and/or chip size. This study showed that the three tropical hardwood wastes studied were not suitable for pulp because of their low yield and strength. Kami mengkaji sisa kayu daripada tiga spesies kayu keras tropika Malaysia untuk memahami kesan spesies terhadap saiz serpih dan ciri pulpa. Tiga spesies tersebut ialah kekatong (Cynometra spp.), merbatu (Parinari oblongifolia) dan nyatoh (Madhuca launfolia), yang masing-masing tergolong sebagai spesies kayu keras berat, sederhana dan ringan. Keputusan menunjukkan spesies kayu memberi kesan terhadap taburan saiz serpih dan kuantiti serpih diterima untuk pempulpaan kraf. Kajian ini juga mendapati spesies kayu dan saiz serpih mempengaruhi hasil pulpa dan sifat-sifatnya. Hasil terskrin meningkat apabila ketumpatan kayu menurun dan nombor kappa meningkat apabila ketumpatan kayu meningkat. Kesan ke atas sifat-sifat pulpa bergantung pada spesies kayu dan/atau saiz serpih. Penyelidikan ini menunjukkan bahawa ketigatiga sisa kayu yang dikaji tidak sesuai untuk penghasilan pulpa dan kertas. Ini kerana keputusan menunjukkan hasil pulpa dan kekuatan kertas yang rendah.

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