What does Bctmp stand for?

Bleached Chemi-ThermoMechanical Pulp (BCTMP) is a pulp product used by the paper industry as a less-expensive alternative for Northern Bleached Softwood Kraft (NBSK). In addition, BCTMP provides higher bulk, opacity, and stiffness in the final product, and the process is more environmentally friendly.

What is the process of pulping?

Pulping is the process where fibers are separated and treated to produce pulp. The wet pulp is then converted into paper at an integrated pulp and paper mill or is dried and transported from the pulp mill to a paper mill. Virgin fibers are derived from pulpwood such as from woodchips or logs.

How is mechanical pulping done?

Mechanical pulping produces pulp through the use of mechanical energy instead of chemicals. Mechanical pulps can be produced by grinding logs or refining chips. Mechanical pulping processes use water for screening, cleaning, and showers on thickeners and grinding stones.

What is Semichemical pulp?

Method of converting wood chips to paper pulp for papermaking utilizing a combination of chemical and mechanical means. Semichemical pulping results in stiff fibers, and the process is used to make corrugated paperboard, cardboard roll cores, and containers. …

What is the process of papermaking?

Typical mechanized paper production involves two main processes: the treatment of raw material, which includes converting chip into pulp, washing and bleaching, refining, beating, sizing, coloring of the fibers, and later to form paper sheet in a Fourdrinier machine.

What is need of pulping process?

A process that extracts fibrous material, cellulose, from wood or other raw material as a prelude to papermaking. The purpose of pulping is to liberate cellulose fibers from other chemicals and impurities in the wood (or other fibrous source). Before wood can be pulped, it must undergo debarking.

What is the difference between mechanical pulping and chemical pulping?

Mechanical pulping uses mostly mechanical energy to separate fibers and develop pulp properties. Chemical pulping uses mostly chemical energy, (from chemical reactions), to separate the fibers and to develop basic pulp properties.

What is a paper making machine called?

Fourdrinier machine
Fourdrinier machine, device for producing paper, paperboard, and other fibreboards, consisting of a moving endless belt of wire or plastic screen that receives a mixture of pulp and water and allows excess water to drain off, forming a continuous sheet for further drying by suction, pressure, and heat.

What is the difference between mechanical and chemical pulp?

What are the 5 stages of paper making?

You can also watch our video below.

• Step 1: Our pulp and paper process.
• Step 2: Diluting paper fibres.
• Step 3: Wire section.
• Step 4: Press section.
• Step 5: How our paper is dried.
• Step 6: Paper finishing.
• Step 7: Real-time quality control.
• Step 8: Paper winding.

Which paper is used for packing?

Kraft paper – kraft paper is available in several forms: natural brown, unbleached, heavy-duty, and bleached white. Natural kraft is the strongest of all paper and is commonly used for bags and wrapping. It is also used to pack flour, sugar, and dried fruits and vegetables.

Who is the biggest paper company?

Stora Enso
Profile: According to recent figures, Stora Enso is now the world’s largest paper and paperboard producer by capacity. The integrated forest products group has employees in more than 40 countries spread across five continents and boasts over 15.7 million metric tonnes/yr of paper and board production capacity.

What are the sub-processes in CTMP pulping?

The key sub-processes in CTMP pulping cover all the way from chip preparation, high-consistency refining, steam recovery, fractionation, treatment of long fiber fraction, bleaching and dewatering to pulp storage prior to papermaking process or drying and baling for market pulp.

Is it true that BCTMP is not groundwood pulp?

However, a recent US Government Printing Office edict, which declared that BCTMP is not a groundwood pulp, could open the door to more sales into this market. The new standard means that papermakers supplying the US government can now use BCTMP as furnish for non-permanent wood-free papers.

Why is BCTMP used as a substitute for kraft pulp?

BCTMP was starting to be used in printing and writing grades as a substitute for more expensive kraft pulp. Still, its primary use was in hygienic products. Millar Western began to aggressively promote BCTMP as a flexible, custom-made product adaptable to a variety of end uses.

How is BCTMP used in the bleach process?

The BCTMP technology is used for both softwood and hardwood prior to the first refining stage. The fibers are bleached in a conventional peroxide bleach plant after refining and screening. ANDRITZ has developed new technologies which are superior to the conventional BCTMP process.