Mill practice report on Trust International Paper Company (TIPCO), Mabalacat, Pampanga, Philippines : Special Topic : Relationship of the secondary fiber morphology and selected handsheet properties at different stages of papermaking processes in TIPCO

Date

6-2015

Degree

Bachelor of Science in Chemical Engineering

Major Course

Major in Pulp and Paper Technology

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Ramon A. Razal

Restrictions

Restricted: Not available to the general public and to those bound by the confidentiality agreement. Access is available only after consultation with author/thesis adviser.

Abstract

The student was allowed to go on a 240-hour field practice in TIPCO. During the course of the practicum, a study on the relationship of the secondary fiber morphology and selected handsheet properties at different paper making stages was conducted. There were six sampling points used, namely, the low density tank, refiner, mixed stock chest, machine chest, fan pump and headbox. The five fiber indices, Runkel ratio, Mulsteph ratio, flexibility ratio, fiber density and relative index of flexibility were calculated using the average of 30 unbroken fibers. It was found out that only the Mulsteph ratio did not satisfy the ideal value. Consistency of the pulp samples vary and are decreasing. Freeness also was decreasing as the consistency decreased as the process progressed. Addition of fines, dilution whitewater and broke may have caused the decrease in freeness values. The Bauer McNett fiber classification test showed that more than 50% of the fibers for each sampling point are long to medium fibers. Density of paper generally increases as the fibers become more refined. In TIPCO, the handsheets formed from pulp taken from the different sampling points are denser than the usual 60 gsm paper. Results showed that the tensile and burst indices increased as the pulp was processed from the low density tank to the headbox. However, tearing index results varied with the low density tank and mixed stock chest samples having the two highest values. The refining action affected the fibers in such a way that the tearing index decreased. Brighntess decreased by 3 % from the low density tank to the refiner. It increased by 1 % from the refiner to the mixed stock chest, and then decreased again from the mixed stock chest to the headbox. Opactiy values ranged from 99.99 to 100.01 %. Handsheets formed from pulp taken from the sampling points passed standards for opacity.

Language

English

Call Number

LG 993 2015 E62 /M46

Notes

status: in process

loc: UPLB Main Library Cataloging Section

Document Type

Thesis

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