Chemical pulp from kenaf woody core/ Chien Chu, Naiyana Niyomwan, Anchalee Puangvichit
โดย: Chu, Chien
ผู้แต่งร่วม: Niyomwan, Naiyana | Puangvichit, Anchalee
Language: English ชื่อชุด: Class. Invest. no.2 Rep. no. 10ข้อมูลการพิมพ์: Bangkok : Thailand Institute of Scientific and Technological Research, 1973 หัวเรื่อง: Kenaf | Pulpsสารสนเทศออนไลน์: Click here to access full-text สาระสังเขป: Kenaf woody core chips were crushed and chlorinated twice at 60 degree celsius for one hour in chlorine water at liquor ratio 6:1 with 6% chlorine in the first stage and 8% chlorine in the second stage. Each chlorination was followed by alkali extraction with 3% coustic soda chips and hypochlorite bleaching with 2% available chlorine. Between chlorinations the partially bleached pulp was disc refined. The yield of final pulp was 70% with 65% brightness and initial freeness S-R 470 ml.สาระสังเขป: Pulp strength test at freeness 360 ml S-R showed breaking length 5,089 m, tear factor 71, burst factor 19, bulk 1044, and folds 33. The pulp quality sppears better than rice NSSC pulp in respect to strength.สาระสังเขป: Pulping of kenaf woody cores by chlorine process and sodium bisulphite process was compared. Chlorine pulping gave higher yield but lower strength than the sodium bisulphite pulping.สาระสังเขป: Sodium bisulphite pulping of kenaf woody core with 20% sodium bisulphite at 150 degree celsius for 4½ hours gave 53% yield. The pulp was bleached to 89% brightness with 8% chlorine in C/E/H sequence. The bleached yield was 82% on unbleached pulp.สาระสังเขป: The bleached pulp with initial freeness S-R 760 ml and final freeness 455 ml after 4 minutes beating gave good pulp strength featuring breaking length 5,255 m, tear factor 85, burst factor 28, bulk 1.26, and folds 76. The pulp is comparable to bleached bagasse kraft pulp. - Authors
| ชนิดของทรัพยากร | Location | Call number | สถานะ | Last seen | Copy No. | บาร์โค้ด |
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วว. เทคโนธานี | Available | 2018-08-31 | 1 | RP1973/274 | |
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วว. เทคโนธานี | Available | 2018-08-31 | 2 | RP1973/274-2 |
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