UTJECAJ ALTERNATIVNIH NE-DRVNIH VLAKANACA U PAPIRNOJ PODLOZI NA KVALITETU REPRODUKCIJE LINIJA

THE INFLUENCE OF ALTERNATIVE NON-WOOD FIBRES IN PAPER SUBSTRATE ON LINE REPRODUCTION QUALITY

Irena Bates, Ivana Plazonić, Željka Barbarić-Mikočević, Vesna Džimbeg-Malčić, Igor Zjakić

Sažetak

U današnje vrijeme papirna industrija se suočava s globalnim nedostatkom drvne sirovine, stoga alternativni izvori primarnih celuloznih vlakanca dobivaju važnu ulogu u proizvodnji papira. U ovom istraživanju korištena je slama pšenice kao izvor nedrvnih vlakanaca. Za izdvajanje celuloznih vlakanaca, slama pšenice bila je izložena djelovanju lužine pri dva različita načina obrade. Vlakanca pšenice i reciklirana drvna vlakanca miješana su u različitim masenim omjerima te je načinjeno šest vrsta laboratorijskih papirnih podloga. Kvaliteta, odnosno tiskovnost laboratorijskih papirnih podloga s alternativnim vlakancima promatrana je kroz analizu reprodukcije linija. Kvalitetna reprodukcija linija izuzetno je važna za čitljivost otisnutih bar kodova i teksta. Temeljem tri parametra (mutnost, nazubljenost i širina linije) u ovom radu kvaliteta reprodukcije linija na laboratorijskim listovima analizirana je i uspoređivana s kontrolnom papirnom podlogom izrađenom samo iz recikliranih drvnih vlakanaca.

KLJUČNE RIJEČI: REPRODUKCIJA LINIJA, NE-DRVNA VLAKANCA, PAPIRNA PODLOGA, TISKOVNOST

Abstract

Nowadays, the paper industry is faced with a global defi ciency of wood raw materials and alternative sources of virgin cellulose fi bres playing an important role in the paper production. In this research wheat straw as non-wood fi bres source was used. In order to isolate cellulose fi bres, the wheat straw was exposed to alkaline treatment using two methods. Wheat fi bres and recycled wood fi bres were mixed in diff erent weight rations and six class of laboratory paper substrates were formed. Th e printability of laboratory paper substrates made with alternative fi bres was observed by classifying line reproduction. High quality line reproduction are extremely important features for reading printed barcodes and text. Th e line reproduction quality, based on three line attributes: blurriness, raggedness and width, was analysed on laboratory paper substrates and compared against a control paper substrate made only of recycled wood fi bres.

KEYWORDS: LINE REPRODUCTION, NON-WOOD FIBRES, PAPER SUBSTRATE, PRINTABILITY
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