admin What is Starch Starch is a natural carbohydrate polymer. The molecular formulae of starch is (C6H10O5)n. Mainly starch is used in paper mill to improve dry strength and surface. Its molecular weight is very high. Native starch has a very high viscosity. On the other hand modified starch has lower viscosity. The main sources of … Read more
Sizing agents are applied into the paper to impart certain desirable qualities. The main function of sizing agent is to increase the resistance to penetration of water or other liquids into the paper so that the paper is suitable for printing, writing and other purpose. It can be achieved either by using wet-end additives or … Read more
What is Talc Talc is well-known as talcum powder. It is a natural hydrated magnesium silicate – H2Mg3(SiO3)4. Talc is a soft, low abrasive, flat-like particle, chemically inert and organophilic material. These are reason why many paper mill use this filler. commercially talcum powder is a wide range of mineral mixtures. Hence pure talc is … Read more
Calcium carbonate is used in paper mill as a filler material in the alkaline papermaking process. Now a days Calcium carbonate dominant over other papermaking filler materials; though at the first stage of papermaking kaolin was 1st choice. The main reason behind the preference of calcium carbonate is the demand for brighter and bulkier paper. … Read more
Slimicide or antislime agent is a substance which is used as antimicrobial agents to kill slime-producing microorganisms in the papermaking process such as bacteria, slime, fungi and algae. It helps reducing production costs due to occasional breaks and shuts which save energy and time. Since paper can be manufactured under acidic or alkaline conditions, a … Read more
Antislime agents or slimicides are used as a cost savings materials in paper mill. Antislime agents are available as powders and in liquid emulsion form. Every paper mill used Antislime agent depends on some criteria. Here I mention a specification of a paper mill. Specification Appearance: Pale yellowish to green liquid. ingredient: Amphoteric poly-acrylamide derivatives … Read more
The dryer clothes or dryer screen or felt has a significant function in the dryer part. Synthetic dryer cloth or fabric is also recognized as conveyor belts. When paper web exceed press section of a paper machine, it contains more than half of its weight is water. Most of this water of the paper web … Read more
The dryer clothes or dryer screen or felt plays an important role in the dryer section. The drying section is one of the most energy consuming parts of the paper machine. About 60% of energies are consumed in this section. Hence the function of dryer clothes or screen absolutely vast. The dryer clothes or felt … Read more
Retention Aid is the key to cost savings in paper mill. Retention aids are used wet end of the paper mill to improve retention of fine particles, fillers, additives & sizing agent during the formation of paper. Particularly retention aid is need to be added in alkaline paper making process, but not in acidic paper … Read more
Retention Aids is the key to cost savings in paper mill. The task of retaining chemical and fibers are more challenging in each and every paper mill. Retention aids are available as powders and in liquid emulsion form. Every paper mill used retention aid depends on some criteria. Here I mention a specification of a … Read more