AGRICULTURAL RESIDUES FOR PACKING AND PACKAGING PAPERS
SALAH ABDELMOHSEN ABDOU MOHAMED;
Abstract
The use of paper-pulp for packaging has become more attractive than traditional materials. So the aim of this work is to get rid of agricultural residues, which consider a big environmental problem and its utilization in the production of economic products of some special applications. The local abundance of agricultural residues is bagasse fibers.
In this study we have studied the following:
1- Prepared bagasse packaging board by cold soda pulping methods
- Pulping of bagasse at room temperature
Different concentrations of sodium hydroxide (up to 90% to bagasse) and longer soaking time (up to four months) at room temperature was failed to give a satisfied pulp without beating even in presence of some additives (as NH4NO3).
- Pulping of bagasse at 80 and 105 oC
Bagasse was cooked by 4% NaOH in plastic bag at liquor ratio (6:1) and pulping temperature 80 oC for different periods of pulping time (2, 3, 4 and 5 h). Good pulp with reasonable yield could be obtained after 2h.
The pulping process in autoclave at 105 oC with\or without NH4NO3 gave good pulp. The pulping in autoclave at 105 oC for only 1h and gave 57.5 % pulp yield while pulping in plastic bag at 80 oC for 3h and gave 48.9 % pulp yield. Much more 3% increase in pulp yield could be attained by NH4NO3 addition during NaOH pulping of bagasse. Schopper Riegler degree (°SR) after beating time 20 minutes was 36-38 °SR for the obtained pulp. Paperboard obtained from virgin bagasse pulp at atmospheric pressure was economically suitable for packaging applications.
2- Studding the influence of different concentration of starch and/or borax as filler added during making sheets.
Hand sheet papers made by adding 1% starch + 1% borax at the same time have superior mechanical properties. The higher fillers ratios have no pronounced effect.
Results show a good improvement in the air permeability properties after the addition of starch and borax at 2% based on oven dry pulp (1:1). Paper additives results in higher paper density compared with plan paper.
In this study we have studied the following:
1- Prepared bagasse packaging board by cold soda pulping methods
- Pulping of bagasse at room temperature
Different concentrations of sodium hydroxide (up to 90% to bagasse) and longer soaking time (up to four months) at room temperature was failed to give a satisfied pulp without beating even in presence of some additives (as NH4NO3).
- Pulping of bagasse at 80 and 105 oC
Bagasse was cooked by 4% NaOH in plastic bag at liquor ratio (6:1) and pulping temperature 80 oC for different periods of pulping time (2, 3, 4 and 5 h). Good pulp with reasonable yield could be obtained after 2h.
The pulping process in autoclave at 105 oC with\or without NH4NO3 gave good pulp. The pulping in autoclave at 105 oC for only 1h and gave 57.5 % pulp yield while pulping in plastic bag at 80 oC for 3h and gave 48.9 % pulp yield. Much more 3% increase in pulp yield could be attained by NH4NO3 addition during NaOH pulping of bagasse. Schopper Riegler degree (°SR) after beating time 20 minutes was 36-38 °SR for the obtained pulp. Paperboard obtained from virgin bagasse pulp at atmospheric pressure was economically suitable for packaging applications.
2- Studding the influence of different concentration of starch and/or borax as filler added during making sheets.
Hand sheet papers made by adding 1% starch + 1% borax at the same time have superior mechanical properties. The higher fillers ratios have no pronounced effect.
Results show a good improvement in the air permeability properties after the addition of starch and borax at 2% based on oven dry pulp (1:1). Paper additives results in higher paper density compared with plan paper.
Other data
| Title | AGRICULTURAL RESIDUES FOR PACKING AND PACKAGING PAPERS | Other Titles | استخدام المخلفات الزراعية في انتاج ورق التعبئة والتغليف | Authors | SALAH ABDELMOHSEN ABDOU MOHAMED | Issue Date | 2014 |
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