INFORMATION ABOUT PAPER AND PULP INDUSTRY

PAPER MAKING PROCESS

The wooden logs from trees are cut down.

Then the logs are debarked ( i. e Then the logs are debarked ( i.e. removing the bark of the tree ) using log debarker.

The debarked logs are then sent through a series of chippers equipped with whirling blades which break them down into smaller and smaller pieces.

The tiny fragments are then pressure cooked with chemicals in a large vat called a digester to separate the fibers.

The wood pulp is cleaned, refined, bleached.

SOME EXAMPLES OF CHEMICALS USED IN PAPER PULP

Its often used in paper pulp for maintaining pH of the paper. CAUSTIC SODA Its often used in paper pulp for maintaining pH of the paper.

SILICATE OF MAGNESIA This chemical gives paper a greasy feel and enable it to take high finish.

HYDROGEN PEROXIDE Used in pulp bleaching.

This is the chemical used to increase the brightness of paper. TITANIUM DIOXIDE This is the chemical used to increase the brightness of paper.

The wood pulp is run through a series of beaters until it is a fine slush.

When the preparation of paper is complete , the paper slush is pumped onto a fast moving wire screen where it will start to become a continuous sheet of paper