Paper mill practice at multi ply paper ventures, Inc.,Bundagul, Mabalacat City, Pampanga, Philippines. Special Topic: Comparison of the morphological characteristics of recycled fibers before and after 120 RPM refining process

Date

12-2014

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. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

The practicum was conducted at Multi Ply Paper Ventures, Inc. (MPPVI) located on TECO Industrial Park, Bundagul, Mabalacat City, Pampanga. MPPVI produces different grades of corrugating medium and test linerboard. A special topic was also conducted that involves the comparison of recycled fibers before and after they undergo 120 rpm refining process. Thirty unbroken recycled fibers were measured and derived fiber indices were computed. Fiber length, fiber diameter, lumen diameter and cell wall thickness of unrefined fibers were 1.731 mm, 0.033 mm, 0.016 mm and 0.009 mm, respectively. Whereas, refined fibers have fiber length, fiber diameter, lumen diameter and cell wall thickness of 1.556 mm, 0.029 mm, 0.014 mm and 0.008 mm. Fiber lengths classification using Bauer McNett showed that before refining process, majority of fibers (39.08%) measured between 25 mm to 0.787 mm. After the refining process, majority of fibers, 34.95%, were above 0.787 mm, however, 28.25% were considered fines. Fiber indices namely: Runkel ratio, Mulsteph ratio, flexibility ratio, fiber density and relative index of flexibility of unrefined fibers were 1.643, 56.649, 0.473, 0.527 and 235.256, respectively. Moreover, Runkel ratio, Mulsteph ratio, flexibility ratio, fiber density and relative index of flexibility of refined fibers were 1.397, 55.557, 0.470, 0.530 and 236.746, respectively. Runkel and Mulsteph Ratios were lower than the ideal values. Also, handsheets were prepared and subjected to property testing including Ring Crush Test (RCT) and Concura Medium Test (CMT). The basis weight, thickness, bursting strength, tensile strength and tearing resistance of handsheets made from unrefined pulp were 64.65 gsm, 0.74 mm, 71.12 kPa, 22.63 N/m and 394.37 mN, respectively. Refined pulp handsheets' basis weight, thickness, bursting strength, tensile strength and tearing resistance were 75.36 gsm, 0.94 mm, 96.46 kPa, 27.13 N/m and 553.14 mN, respectively. RCT and CMT values for unrefined and refined pulp were 0.28 kN/m, 31.22 N, and 0.36 kN/m, 35.05 N, respectively. Only burst strength and RCT value have significant difference. Hence, 120 rpm refining process has mixed effect on handsheet properties made from recycled fibers. Electric power consumption of using ConFlo refiner with 120 rpm speed is PhP 4.32 M per annum.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993 2014 E62 /A43

Document Type

Thesis

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