What are the different types of pulp?
According to its refining degree, it can be divided into three kinds: unbleached, semi-bleached and bleached. Unbleached pulp contains a small amount of lignin and colored impurities, so it is yellow and the fiber is hard. It is used for medium printing paper, thin wrapping paper, translucent paper and oil-proof paper.
What is BHKP pulp used for?
Bleached Hardwood Kraft Pulp (BHKP) is commonly used in paperboard and specialty paper, as well as coated and uncoated papers and tissue. In many applications, hardwood pulp provides excellent strength and surface properties.
What is BSKP pulp?
CMPC’s BSKP pulp is known throughout the world as versatile pulp with uniform characteristics. It is used as a raw material in a range of products from printing and writing paper (coated or uncoated) to cardboards, tissue and other specialty products.
How many types of paper pulp are there?
There are many types of paper pulp processing, chemical pulping, mechanical pulping and chemi-mechanical pulping are three typical types among them.
What is softwood pulp?
As its name implies, softwood pulp is soft and contains more resin. Softwood has flat cells in a radial structure. The cell lumen always contains tannin compounds along with resin and is full of air. The major proportion of softwood is cellulose, accounting for 55%, hemicellulose for 11% and lignin at nearly 26%.
What pulp is used for tissue?
Both Rottneros Mill and Vallvik Mill manufacture grades of pulp that are used for production of tissue paper. Groundwood pulp, CTMP (Chemi-Thermo-Mechanical Pulp) and long-fibre sulphate pulp can all be used to manufacture tissue paper.
How is fluff pulp made?
Fluff pulps are used as raw material in the absorbent core of personal care products such as diapers, feminine hygiene products, air-laid absorbent towelling as such or in conjunction with super-absorbents or synthetic fibres. Fluff pulp is normally made of softwood pulp obtained by sulphate or sulphite pulping.
What is Lbkp?
LBKP is a pulp made from hardwood which is short fiber, chemically cooked with kraft process, and bleached using elementally chlorine- free bleaching process. At this stage, the fiber absorbs water and swells so that fiber fibrillation can be maximized.
What is paper pulp called?
Mechanical pulp, generally called groundwood, is usually produced by a mechanical grinding process and is not further classified except as fine, coarse, or bleached.
What is paper pulp method?
The pulping process is aimed at removing lignin without loosing fiber strength, thereby freeing the fibers and removing impurities that cause discoloration and possible future disintegration of the paper. Hemicellulose plays an important role in fiber-to-fiber bonding in papermaking.
Which is an example of the use of BHKP?
The use of BHKP in integrated paper production differs from that of market BHKP. Another end-use sector where BHKP for market pulp is higher than in integrated use is tissue. Cartonboard use is another area where integrated use of BHKP is higher than the market use.
Why was the BHK pulp mill in Rizhao shut down?
The company has shut down the 1.5 million t BHK pulp plant at its mill in Rizhao on 23 July owing to a shortage of water. A smaller machine with a capacity of 300,000 tpy has apparently been standing still since 13 July. This article is an excerpt from EUWID’s monthly report on the pulp markets in Western Europe.
How did the kraft pulp process get its name?
Kraft pulp – The Kraft process is the world’s predominant chemical pulping process. The name is derived from the German word for “strong.” The method involves cooking (digesting) wood chips in an alkaline solution for several hours during which time the chemicals attack the lignin in the wood.
What kind of pulp is used for newsprint?
The furnish of newsprint is mainly mechanical pulp and/or recycled fiber. UWF – Uncoated woodfree printing and writing paper (see Woodfree paper). Woodfree paper – A printing and writing paper which contains little or no mechanical woodpulp. For statistical purposes any paper which contains less than 10% mechanical pulp is categorized as woodfree.