Pulp mill

Pulp mill

Pulp is the main source for paper making. It is produce at pulp mill. After production paper pulp is supplied to paper mill for paper making.

Wood is the most widely used raw material for paper pulp. Without wood there are some other things are used for pulp making that are cotton, linen, bombax wool, jute hemp, sisal hemp, Manila hemp, straw, esparto, Pineapple leaf fiber, palm, coconut fiber, sugar cane, Bamboo etc. Also paper recycle machine made the waste paper reused, resources saved and environment protected.

Classification of pulp wood

Coniferous or Soft wood trees: spruce, pine, fir (balsam), larch, tamarack, cypress, Douglas fir, hemlock etc.

Broad leaf or hard wood trees: eucalyptus, aspen, maple, Poplar, Tulip, Basswood, birch etc.

There are three categories of paper that can be used as feedstocks for making recycled paper: mill broke, pre-consumer waste, and post-consumer waste.

Mill broke is paper trimmings and other paper scrap from the manufacture of paper, and is recycled internally in a paper mill.
Pre-consumer waste is material which left the paper mill but was discarded before it was ready for consumer use.
Post-consumer waste is material discarded after consumer use, such as old corrugated containers (OCC), old magazines, and newspapers.

Paper suitable for recycling is called "scrap paper", often used to produce molded pulp packaging. The industrial process of removing printing ink from paperfibers of recycled paper to make deinked pulp is called deinking, an invention of the German jurist Justus Claproth.

Where softwood trees produce long fiber and hard wood produce short fiber.

Pulp manufacturing



Fully chemical methods (Kraft and sulfite processes)

The finished product may be either bleached or non-bleached. Bleached pulp used to produce a white paper product.

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