Question

Mention the requisites for any cellulose raw material for the paper and pulp industries.

Answer 1

Cellulose fibre is primary raw material for paper manufacturing. 50 per cent cellulose present in wood, 20 per cent aromatic hydrocarbons and hemicellulose, carbohydrates and approximatley 30 per cent lignin (a resinous adhesive which holds the fibres together) and . In order to isolate cellulose in for paper manufacture, the wood or plant material must be pulped to separate the fibres and remove impurities. The higher cellulose content of the pulp and longer fibres make better quality of paper. Hardwoods generally contain a higher proportion of cellulose but shorter fibre length than softwoods which are more resinous. Eucalyptus, Poplar, Acacia, Subabul, Casuarina are hardwood species and Pine is like soft wood used for manufacturing of paper and paperboard. Generally, chemical and mechanical pulping both involes inthe manufacturing of paper and paperboard from the wood.