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標題: 手工紙原料分析與製漿性之比較
Analyses of Different Raw Materials for Handmade Papers and Comparison of Their Pulping Properties
作者: 林明寬
Lin, Ming-Kuan
關鍵字: Handmade paper;手工紙;aper Mulberry;Gampi;Paper Birch;Wingeeltis;Kappa number;構樹;雁皮;三椏;青檀;卡巴值
出版社: 森林學系

The art of papermaking is one of the great inventions in
ancient China.Paper as a medium for carrying creative
ingenuities of mankind, hascontributed tremendously to the
progress of human civilization. Nowadays, mostpapers are made by
machine in massive quantities and therefore handmade papersseem
on the verge of extinction. However there is still a fine
potential forus to have research and development of handmade
paper due to its pure anddelicate nature, excellent permanence,
and great versatility. I addition,handmade paper has lots of
attributes that are irreplaceable with machine-madepapers. The
purpose of this study intends to analyze the fiber dimension
andchemical composition of different raw materials for handmade
paper, and thento compare their differences in pulping and
bleaching properties. Theexperimental results were summarized as
follows:1.Length/width ratios of various bast fibers have higher
value (>150) andlower lignin content than those of wood fibers.
These fibers are suitable forfine paper manufacturing.The
differences in chemical compositions of samespecies are small,
and a noticeable differences exist for various species.2.For the
High holocellulose content in Paper Mulberry resulted in a
higherpulp yield is obtained. It is easy to fiberize for the
high 1%NaOHextractives-containing Gampi and Paper Birch. From
the results of EDSanalysis, higher calcium content in barks'
ashes, and then potassium werefound; but the potassium content
is higher than calcium for Paper Mulberryfrom Thailand and the
Paper Birch from China. In addition, small amount of Mg,P, S,
and Si elements are found in barks'ashes as well.3.Soda-AQ
pulping of the Gampi from Philippine in a closed digester may
reducethe Kappa No. of unbleached pulp to a bleachable degree.
Except tear, theGampi from Japan has the highest strengths as
compared to other species. Athoroughly pretreatment of the Paper
Mulberry from Japan has a very low KappaNo., high yield and
brightness.4.Generally speaking, the reduction in paper
strengths are found afterbleaching for all varieties of pulps.
The higher dosage of bleaching agents inbleaching stages results
in lower strengths. However, there are no significantdifferences
for the reduction of Kappa No. and the increase in brightness
uponbleaching the pulps by 5% and 10% NaOCl levels.5.Upon the
accelerated aging, the Philippine,s Gampi pulp with open
digesterhas greater tendency of color reversion as compared with
others. In addition,under sunlight exposure bleached Wingeeltis
pulp has the least tendency ofcolor reversion. Bleached soda-AQ
Philippine,s Gampi pulp with closeddigester pulping may reduce
the tendency of color reversion.
Appears in Collections:森林學系

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