Guidelines to choosing best paper towels

There are different types of paper such as Printing and Writing Papers, Tissue, Newsprint, Containerboard, Kraft Paper, and Paperboard. Paper towels are under category of tissue paper. After toilet paper, it is the most purchased tissue product by consumers. The basic raw material of Read more

Posted in Paper towels, Tissue Paper | Tagged , , , , , , , , , | 3 Comments

Oxygen delignification process

Oxygen Delignification is one of the most significant and well proven pulp bleaching process for ECF (elemental chlorine free) and TCF (total chlorine free) bleached pulp production. It is the first stage of the bleaching process; in this case oxygen and alkali are used to eliminate a Read more

Posted in Lignin, pulp bleaching, Pulp Mill | Tagged , , , , , , | 6 Comments

The chemical reactions in Kraft pulping process

Kraft pulping process is the most used pulping process in the world. In this process lignin goes into the reactions with the cooking liquor chemicals and split into fragment. These fragments dissolved with the solution and wood disintegrates into fiber. During the kraft pulping process about 80 Read more

Posted in Lignin, Pulp Mill, Pulping Process | Tagged , , , , , | 2 Comments

Lignin structure, properties, function and uses

Lignin is an aromatic complex polymer of monolignols (aromatic alcohols) which is found in plant cell walls. Later than cellulose, lignin is the most abundant natural polymer in the planet. It is not composed of carbohydrate monomers whereas the rest of polymers found in plant cell walls are Read more

Posted in Lignin, Pulp Mill | Tagged , , , , , , , , | 3 Comments

Pulp Bleaching Sequences

Globally, there are several bleaching sequences are shown in different pulp mills to achieve the bleaching action. Different chemicals are used in each stage usually with washing between two stages to removes products. The preference of bleaching sequences depends on many things such as pulp Read more

Posted in pulp bleaching, Pulp Mill | Tagged , , , , | Leave a comment

What is bleaching of pulp

The objective of pulp bleaching is to produce white pulp. Unbleached pulps are not suitable for manufacturing of high grade of white paper. Since all the processing pulp brightness is very low, especially Kraft pulp. The sulfite pulping process produces comparatively bright chemical pulps, while Read more

Posted in pulp bleaching, Pulp Mill | Tagged , , | Leave a comment

Pulp screening

Screening equipment is the important operational system for pulp processing. After separation of the black liquor from the fiber in the washing section the pulp contains coarser fibers, foreign matter and dirt as like pieces of bark, digester brick, cement etc. Hence this unwanted and troublesome Read more

Posted in Pulp Mill, Screening | Tagged , , , , | 1 Comment

Pulp Washing

There are different methods are available for pulp washing such as rotary vacuum washer, rotary pressure washer, pressure and atmospheric diffusion washers, horizontal belt washer and dilution/extraction equipment. Among them the rotary vacuum washer method is well-known to paper makers for long Read more

Posted in Pulp Mill, Pulp Washing | Tagged , , , , , , , , | 3 Comments

Kraft pulping process

Sulfate or Kraft pulp is one of the chemical pulping processes. It is manufactured by alkaline method. Kraft pulping process is the dominating pulp manufacturing process in the world. Today this process is most widely used with a production of 70-80% of the total Pulp. Raw material: Although soft Read more

Posted in Pulping Process | Tagged , , , , , , , | Leave a comment

Tensile strength of paper

What is the tensile strength of paper? The tensile strength is the maximum stress to break a strip of paper sheet. It is one of the most important basic physical properties of paper and paperboard. The tensile strength is different basis on fiber direction. Since the fiber orientation is Read more

Posted in Paper Properties | Tagged , , , | 9 Comments