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Wrapping and Packing Paper from Acetic Acid Blended Pulp of Nal

A.N.M.I. Ahsan
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh

M.M. Rahman
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh

M. Mukta
Department of Horticulture and Post harvest Technology, Sher-e-Bangla Agricultural University, Dhaka

M.S. Hossin
Department of Soil Scince, Bangladesh Agricultural University, Mymensingh

M.S. Karim
Department of Chemistry and Physics, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

Nal (Arundo donax) a reed like celluslosic raw materials was selected for acetic acid pulping with a view to obtaining wrapping and packing paper. The optimum pulping (cooking) conditions regarding time, temperature, and chemicals like acetic acid and hydrochloric acids were established depending mainly on the basis of unbleached pulp-yield and permanganate or kappa number of the same. Series of pulping experiments were done in a distillation flask of 3 litre capacity kept in a wax-bath heated by Bunsen burner. By using optimum conditions, pulps in bulk quantities were also made. Those were disintegrated in a disintegrator and then beaten for different number of revolutions. Samples of pulp-slurries at 0, 500, 1000, 1500, 2000 revolutions were collected pulp or paper-sheet were made from each of the samples. The sheets were conditioned and that tested for paper or physical properties like breaking length, tear factor, burst factor, folding number and brightness. The freeness of the unbleached pulp was also determined and recorded. From the results, it has been found that good quality wrapping and packing paper can be made from nal by acetic acid pulping process in less cooking time.

Keywords: Acetic acid, Pulp, nal (Arundo donax), Cellulosic raw material and packing paper

Location: Department of Chemistry and Physics, Bangladesh Agricultural University, Mymensingh

Start Date: 00-03-2007

End Date: 00-10-2007

Program Area: Resource Development and Management

Non-commodity: Adoption of technology

Objectives:

1. To obtainin pulp for wrapping and packing paper from nal (Nal - Arundo donax, is a rapid growing plant and attains maturity in 3-4 months)at low cost and in less cooking time.

Methodology:

Cellulosic raw materials: Acetic acid pulping process was applied to nal in order to obtain wrapping and packing paper. Preparation of raw materials: With a view to determining moisture, the sun dried nal was cut into pieces of about 1.0 cm in length. Then a few samples of not more than 5 gram were put in an electric oven at 100±2°C for a minimum period of 18 hours for determination of moisture contents. Preparation of solutions: The cooking liquor consisted of glacial acetic acid solution and concentrated solution of hydrochloric acid and the liquor was used for pulping nal in a distillation flask of 3 liter capacity. The strength of acetic acid solution was more than 95%. Distillation: Pulping or cooking was done in a distillation flask which was put in a wax bath heated by Bunsen burner. Glacial acetic acid solution as solvent and concentrated hydrochloric acid solution as catalytic one were placed in the distillation flask. The amount of o. d. chips was 100g in each experiment of the series. The cooking started with the distillation of acetic acid solution at a temperature of 118±2°C. Establishment of optimum conditions for pulping: Series of experiments were made with the variation of volume of acetic acid solution, hydrochloric acid solution, time and temperature. Optimum conditions were established after careful studies of the unbleached pulp yield and permanganate number of pulp, breaking length, tear factor, bust factor of the unbleached pulp sheets. In addition, freeness of the pulp was also determined. Determination of unbleached pulp yields: Two samples of wet pulp weighing not more than 5 g each were put in an electric oven at 100±2°C for a minimum period of 18 hours for determination of unbleached yield. Determination of permanganate number: The permanganate number was repeatedly determined according to TAPPI standard procedure of T-214. It is also known as kappa number. Laboratory evaluation of unbleached pulps: Required amount of the unbleached pulp of nal was obtained by optimum cooking conditions, disintegrated and beaten as per TAPPI standard (T-200) in a suitable laboratory beater (PFI mills) up to 2000 revolutions. Samples of pulp-slury at 0 revolution and after each 500 revolutions were collected. Standard pulp-sheets each weighing 60 g/M2 were made from the different collected samples in Rapid Köthen sheet former and the sheets were conditioned and then tested for tensile (T-404), tearing (T-470) and bursting strength (T-403), all according to TAPPI standard procedures. Measurement of brightness: The brightness of the standard unbleached pulp-sheets though not necessary yet was determined according to TAPPI procedure of T-452 against that of BaSO^-4. Determination of tensile strength: The tensile strength of the pulp or paper sheet was also determined with TAPPI standard procedures. Determination of tearing strength: The tearing strength of the unbleached pulp-sheets was determined with the use of TAPPI procedures of T-470. Determination of bursting strength: The bursting strength of the same was determined by TAPPI standard procedures of T-403. Freeness: Schopper Reigler apparatus was used for determination of freeness in °SR unit. The amount of o.d. pulp was 3 g and the related TAPPI standard procedures were adopted for the purpose.

Source of Information: J. Agrofor. Environ. 2(2): 197-200, 2008; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It has been found that good quality wrapping and packing paper can be made from nal by acetic acid pulping process in less cooking time.

Knowledge Management: Journal