Mercerised pulp is a bleached
pulp that is treated with hot diluted alkali to get extra high bulk and high porosity.
The pulp feels and looks similar to a
cotton ball
Cotton pads are pads made of cotton which are used for medical or cosmetic purposes. For medical purposes, cotton pads are used to stop or prevent bleeding from minor punctures such as injections or venipuncture. They may be secured in place wit ...
.
Manufacture
Mercerising of pulp is a post treatment of fully
bleached
Bleached is an American pop band consisting of sisters Jennifer and Jessica Clavin, formerly of Mika Miko. The band plays a style of rock, pop, rock and roll, and indie rock. Bleached was established in Los Angeles in 2011. The group has releas ...
pulp normally of
SBSK. The pulp is steeped in hot dilute
caustic soda
Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations and hydroxide anions .
Sodium hydroxide is a highly caustic base and alkal ...
. The pulp fibres swell and the
hydroxyl groups of the
cellulose
Cellulose is an organic compound with the formula , a polysaccharide consisting of a linear chain of several hundred to many thousands of β(1→4) linked D-glucose units. Cellulose is an important structural component of the primary cell wall ...
become crosslinked. The remaining
hemicellulose
A hemicellulose (also known as polyose) is one of a number of heteropolymers (matrix polysaccharides), such as arabinoxylans, present along with cellulose in almost all terrestrial plant cell walls.Scheller HV, Ulvskov Hemicelluloses.// Annu Rev ...
is washed out and the pulp will subsequently not respond to
refining
{{Unreferenced, date=December 2009
Refining (also perhaps called by the mathematical term affining) is the process of purification of a (1) substance or a (2) form. The term is usually used of a natural resource that is almost in a usable form, b ...
.
Applications
*
Filter paper Filter paper is a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solid particles from liquids or gases.
The raw materials are different Pulp (paper), paper pulps. The pulp may be made from soft ...
*
Non-wovens
Nonwoven fabric is a fabric-like material made from staple fibre (short) and long fibres (continuous long), bonded together by chemical, mechanical, heat or solvent treatment. The term is used in the textile manufacturing industry to denote fabri ...
See also
*
Mercerised cotton
References
{{Paper
Papermaking
Cellulose