Pulp is in the paper making process will be added to the pulp in the gum, filler, colour and other additives modulation into a fibre for papermaking interest floating liquid. Pulp is an organic substance with general colloidal properties, rich in plasticity, can be used as a dye and other chemicals on the fabric transfer agent. In the practical application of pulp, foam problems arise from time to time. These foams are viscous, difficult to eliminate, very much in need of pulp defoamer help.
More types of paper pulp, there are mechanical wood pulp, sulphate wood pulp, sulphite wood pulp, waste paper pulp and other four categories. Mechanical wood pulp is the use of mechanical methods of grinding fibre raw materials made of pulp, it occupies an important position in the paper industry. Sulphited wood pulp is made by using a mixture of sodium hydroxide and sodium sulphide as the cooking agent, the paper made, its folding, breaking and tear strength is good; sulphited wood pulp fibres are longer, soft in nature, good toughness, high strength, and has a very good interweaving ability.
As the pulp contains a lot of air, a lot of these gases will be retained in the pulp inside, difficult to escape, so it will form a lot of foam; In addition, the pulp contains many lignin polysaccharides, resins, proteins and other organic substances and surface-active substances, is the main reason for the production of foam; due to the mixing operation of machinery and equipment will also lead to the production of foam, the pulp will affect the quality of the pulp.
Foam in the pulp will affect the progress of pulp production, resulting in lower production efficiency, but also reduce the density of the pulp, resulting in increased pulp costs; too much foam will make the fibers in the slurry to float up to produce floating pulp, foam and flocculation, resulting in uneven dispersion of pulp on the Internet, so that the quality of the paper is reduced; in addition, the generation of foam will also make the quality of the slurry and the performance of the pulp is affected, resulting in the production of the surface of the paper with pinholes, White spots and other defects.
In the face of foam in the pulp, many people will choose the pulp defoamer to solve the foam, the defoamer defoaming, foam inhibition performance is good, can be very good to eliminate all kinds of foam in the size of the pulp, and inhibit the production of subsequent bubbles; water solubility is good, fast dispersion, it can be very good and the pulp soluble, not bleaching oil, no precipitation; resistance to high temperatures, acid and alkali resistance, chemical stability and good, after the use of the pulp will not affect the basic performance of the pulp. It has good chemical stability and will not affect the basic performance of the pulp after use.
