Izrada papira iz vlakanaca konoplje

Josipović, Karlo (2013) Izrada papira iz vlakanaca konoplje. Diploma work - Pre-Bologna programme. Grafički fakutet. [Mentor: Lozo, Branka].

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Abstract

Jednogodišnje biljke se često koriste za izradu papira, naročito u krajevima bogatima takvom sirovinom, u dijelovima Europe poput Nizozemske, Belgije i sl, ili u azijskim zemljama, poglavito u zemljama Dalekog istoka. Specifičnost sirovine jednogodišnjih biljki jest u morfologiji vlakanaca u odnosu na vlakanca višegodišnjih biljki, zatim u sastavu vlakanaca, odnosno udjelu celuloze, lignina i hemiceluloza, te posebno u proceduri obrade takvih vlakanaca. Naime, razvlaknjivanje kao jedan od prvih postupaka u obradi ovakve sirovine u velike se razlikuje od razvlaknjivanja koje se provodi za višegodišnje biljke, a također se razlikuje i od postupaka koji se primjenjuju prilikom recikliranja papira. Obrada jednogodišnjih biljki uključuje kuhanje pod uvjetima visokog pritiska i temperature uz dodatke. Vlakna koja se dobiju ovakvom obradom mogu poslužiti za izradu papira po konvencionalnim postupcima, ručno ili industrijski, a mogu se koristiti i kao dodaci drugim vrstama vlakanca u određenom omjeru. Izbor ovisi o željenim svojstvima gotovog papira, tj. o njegovoj budućoj namjeni, budući da u velikom broju slučajeva vlakna jednogodišnjih biljki doprinose mehaničkim svojstvima papira kojeg grade.

Item Type:	Diploma work - Pre-Bologna programme
Mentor name:	Lozo, Branka
Defence date:	29 October 2013
Abstract in english:	Annual plants are frequently being used for paper production, especially in countries enriched with this raw material, in parts of Europe like The Netherlands, Belgium and others, or in Asia countries, especially in Far East countries. Specificity of this kind of raw material produced form annual plants is in its morphology of fiber compared with fiber produced form perennial plants, in chemical composition of fiber, respectively in share of cellulose, lignin and hemicellulose, and especially in processing procedures these kind of fibers. Disintegration and recycling are different form processes used for perennial plants. Processing of annual plants is based on cocking in high pressure systems. These fibers can be used for paper making, mechanical or handmade, or can be used for mixing with other fibers in a certain proportions. The choice depends on wanted characteristics of finished paper, its future uses, since annual plants are commonly used to enhance mechanical properties of paper.
Uncontrolled Keywords:	Jednogodišnje biljke, Konoplja, proizvodnja papira, morfologija vlakanca, kuhanje u kiselom i lužnatom mediju
Keywords in english:	Annual plants, Hemp, paper making, fiber morphology, acid and alcaline cooking
Subjects:	TECHNICAL SCIENCES > Graphic Technology
Institution:	Grafički fakutet
City:	Zagreb
Number of Pages:	64
Callnumber:	loz 2013 jos
Inventory number:	D1068
Depositing User:	Dora Budić
Status:	Unpublished
Date Deposited:	17 Apr 2014 13:46
Last Modified:	17 Apr 2014 13:46
URI:	http://eprints.grf.unizg.hr/id/eprint/1660

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