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Hydrophobic Property of Handmade Jute Paper Treated by Sizing Material ‘rosin’

H. M. Zakir Hossain
Pilot Plant and Processing DivisionBangladesh Jute Research Institute (BJRI), Manik Mia Avenue, Dhaka

Md. Kamal Uddin
Pilot Plant and Processing DivisionBangladesh Jute Research Institute (BJRI), Manik Mia Avenue, Dhaka

Khaled Saifullah
Mechanical Processing Division (BJRI), Dhaka

M. M. Rashid
Textile Physics Division (BJRI), Dhaka

M. M. Mollah
Textile Physics Division (BJRI), Dhaka

Abstract/ Executive Summary:

To produce hydrophobic handmade paper internal material rosin along with external additive (MCC suspension), internal additive(wax emulsion) and reinforcement were used. Optimum result was obtained when rosin along with alum was used as internal additive during pulp preparation and MCC in the form of suspension was applied as external additive. The hydrophobicity was increased by 92.46% due to rosin-alum treatment and application of MCC suspension as external additive. It was also observed that application of wax along with rosin hampered/hindered the hydrophobicity.

Keywords: Handmade, Jute, Paper, Hydrophobic, Sizing material

Location:

Start Date:

End Date:

Program Area: Postharvest and Agro-processing

Commodity: Jute

Objectives:

Handmade papers produced from jute were treated with various internal sizing materials(rosin alum,wax emulsion) and external sizing material (MCC solution prepared from jute [10]) and raw jute fibres were reinforced to increase the hydrophobic property of paper in this present work.

Methodology:

Bangladesh white B (BWB) jute and collected from Mechanical Processing Division of Bangladesh Jute Research Institute and Mennonite Central Committee provided chemicals and laboratory facilities. Ten experiments were performed. Such as: Experiment- 01 : To make control paper without using any sizing/ reinforcement. Experiment- 02 : To make paper using rosin and alum as internal sizing. Experiment- 03 :To make paper using rosin and alum as internal sizing and incorporating jute fibre reinforcement. Experiment- 04 :To make paper using rosin, alum and wax emulsion as internal sizing. Experiment- 05 :To make paper using rosin, alum and wax emulsion as internal sizing and incorporating jute fibre reinforcement. Experiment- 06 : To make paper using rosin and alum as internal sizing and MCC as external sizing. Experiment- 07 : To make paper using rosin and alum as internal sizing incorporating jute fibre reinforcement as well as using MCC as external sizing. 2.1 Preparation of fiber sample: The fibers were cleaned carefully so that no barks. roots were present. These cleaned fibers were cut to the size of 1.27 cm -2.54 cm ( 2 1 - 1 inch) 2.2 Preparation of pulp: 2.2.1 Boiling: 300g of cut fibers were taken.18 g sodium hydroxide (6% of the arterial) was dissolved in 10 liter of water by boiling. The amount of water was maintained about 10 litre through the whole boiling process. As soon as a water reached the boiling temperature fibers were immersed in the boiling water of a open tube and boiling was continued for 4 hours to remove some impurities as may be soluble in mild alkalis at moderately high temperature as well as to soften and condition the fiber. The boiled fibers were then properly washed by water until the effluent was practically clear. The length of washing time was so adjusted that the fiber/ stock will be as clean as possible with a minimum of fiber loss. 2.2.2 Beating: The washed jute fibers were taken with 70 kg of fresh water in the open vessel of beater. The fibers were converted into a pulp through cutting and beating in beater for 2 2 2 1 4 1 − hours. The pulp was keep standing for 17.25 hours. Then pulp was washed to Maintain pH 7 . 2.3 Internal Sizing: The washed pulp had under gone different sizing treatment to increase strength and hydrophobic property of the papers to be produced. Pulp was kept in a open bucket containing 20 Litter of water. a) 1.5% Rosin (The most commonly used water repellent compound in stock sizing) soap in form of solution was applied and stirred for 5 minutes by blender.Then (after 30 minuets) 3% Alum solution was mixed and stirred for another 5 minuets. b)1.5% Rosin soap was applied and stirred for 5 minutes by blender. Than (after 30 minutes) 0.75% was emulsion was mixed and stirred for another 5 minutes. Than 3% alum in the from of solution was applied and stirred for 5 minutes. The pulp was kept for 20 minutes after applying internal sizing. • On the wt. fibre material. 2.3.1 Preparation of Rosin size soap: 500g of powdered rosin was taken. 50g NaoH (10% of rosin powder) was dissolved in to 1 liter of water by heating .Rosin powder was first converted in to paste by adding some hot caustic soda solution. Rosin soap was prepared by adding the remaining caustic soda solution with Rosin paste and boiled 30 minuets. 2.3.2 Preparation of Rosin Size Solution: 1.5% (on the wt. of fibre material) i.e. 4.5gm rosin soap was taken and solution prepared by diluting Rosin soap with hot water. 2.3.3 Preparation of Alum Solution: 3% ( On the wt. fiber material) i.e. 9gm alum was taken. Alum solution was prepared by adding hot water. 2.4 Preparation of wax solution: 0.75% (On the wt. fiber material) i.e. 2.25g liquid paraffin wax was mixed in water by stirring in a blender. No emulsifier was used.

Source of Information: DAFFODIL INTERNATIONAL UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY, VOLUME 5, ISSUE 1, JANUARY 2010

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Hydrophobic is an important property of paper that repels water. Various paper grades require a low level of porosity to air in order to feed properly in copiers and sorting machines for example. Other paper grades require a highly continuous film on their surface that will resist penetration by non-aqueous fluids. The use of sizing in paper is known to provide several beneficial attributes to the paper and processing thereof including paper strength, retarding paper penetration into the sheet and the quality and ease of printing on the paper. The water repellent handmade jute paper has a great potential in market of grocery, vegetables ,butcher etc as substitute of poly bags for packing purpose.

Knowledge Management: Journal