By : Ferdian Alam Wahyudi (st110030) OPTIMIZING FILLER RETENTION OF MIXED TROPICAL HARDWOOD BASED FINE PAPER FINAL DEFENSE PRESENTATION

INTRODUCTION 1. Background In order to reduce the raw material cost, Filler materials introduce into production line. However, improve filler retention on paper quite difficult, especially when using Mixed tropical hardwood pulp. Therefore, a study to improve filler retention on Mixed Tropical Hardwood based fine paper is needed. Acacia and Mixed Tropical Hardwood pulp is a standart raw material for producing paper in APRIL.

INTRODUCTION 2. Objectives To observe the performance of APRIL’s retention system. Investigate the possibility to improve filler retention on the paper without sacrificing paper quality modify the retention system sequence and determine the modication effects.

Methodology 1. Sections of the experiment Optimizing Filler Retention of Mixed Tropical Hardwood Based Fine Paper Experiment 1. Studying the effects of different filler loading method Expriment 2. Observation the effects of microparticle and nanoparticle based retention system Experiment 3. Observation the effects of regular (linear) CPAM and dispersion CPAM in retentention system Experiment 1.1 Studying the effects of pre-flocculation filler with cationic starch Experiment 1.2 Studying the effects of pre-flocculation filler with CPAM

Methodology Mix all Pulp constituent with broke, filler and retention aid Adding Chemicals MTH Slurry (380 CSF) Pine Slurry (380 CSF) Broke Slurry Fiber morphology test Zeta Potential Fiber morphology test Zeta Potential Fiber morphology test Zeta Potential PCC & GCC Filler 2. Flow chart of the experiments Zeta Potential

Methodology 3. Detail of the methods Standar method for each experiment Modification method for filler & CPAM loading

RESULT Comparison of Conventional Filler and CPAM Loading (CFCp) and Pre-Flocculation Filler with CPAM (FFCp). CFCp (conventional) FFCp (Pre-flocculation)

Cationic starch Anionic polymer (APAM) + Anionic microparticle) Cationic starch Cationic polymer (CPAM) Anionic polymer (APAM) + Anionic microparticle) Shear Force Reflocculation Shear force Reflocculation

The addition of two cationic polymer to bring the system zeta potential to isoelectric point is not required. CONCLUSSION Optimizing filler retention can be done even using one cationic polymer in the retention system.

Recomendation Mills could save in chemical consumption/cost by limiting themselves to only one cationic polymer.

Production Capacity : ton/year CPAM consumption : 300 gr/ton CPAM consumption per year : ton/year x 300 gr/ton : 240 ton CPAM/year CPAM price : $ /ton CPAM Chemical cost saving from CPAM = 240 ton CPAM/year x $ /ton CPAM Benefit = $ /year

1 Effects of different filler loading method Proportion of retention aid in each experiment APENDIX