A kind of preparation technology of polyphenylene sulfide grinding disc for papermaking

Abstract

The invention discloses a preparation process of a paper-making polyphenylene sulfide millstone. The polyphenylene sulfide millstone is prepared from a polyphenylene sulfide composite material comprising the following raw materials: polyphenylene sulfide resin, a toughening component, reinforcing fibers, a wear-resistant component and a non-fibrous auxiliary agent. The preparation process comprises the steps of 1, pretreatment of materials; 2, preparation and mixing of the materials; 3, preheating and drying; 4, plasticization; 5, injection molding; 6, pressure maintaining; 7, cooling; 8, demolding and after-treatment. The preparation process is simple in flow and easy in processing and molding and has the advantages of low cost and low energy consumption, and the polyphenylene sulfide millstone prepared by the preparation process disclosed by the invention is small in noise, wide in corrosive medium, long in service life and capable of effectively increasing the speed of a paper machine, so that the paper-making output is increased.

Description

technical field [0001] The invention belongs to the field of material engineering, and in particular relates to a preparation process of a polyphenylene sulfide grinding disc for papermaking. Background technique [0002] As we all know, in the papermaking pulping system, the beating link is the most important. The most important machine in papermaking machinery is the refiner, which produces pulp, which is the foundation of the entire papermaking industry, and the performance of the grinding disc in the refiner determines the key factors of the operation status, production efficiency, enterprise profit and product quality of the entire papermaking production line. . The grinding disc of the refiner is composed of a set of movable grinding disc and fixed grinding disc (or a complete set of rotor and stator). The pulp fibers are cut and opened, so that the fibers are distributed in a multi-pronged broom, so as to obtain good paper strength. When the grinding disc is workin...

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Problems solved by technology

The cost of casting mold is high, the life is short, the whole process is expensive, the production speed is slow, the process is complicated, and the energy consumption is serious, which is not conducive to environmental protection

[0003] Chinese patent CN2118083U discloses a plastic grinding disc, which relates to a special tool for papermaking beating, especially a plastic grinding disc used in conjunction with a disc refiner. It is divided into two parts: metal tray and grinding stone. The grinding stone is made of plastic and has a porous and multi-grooved surface. Although it is light in weight, it can greatly reduce power consumption, long service life, low noise, and can be used during grinding. The advantage of protecting the fiber length during the process, but this kind of plastic grinding disc is just an ordinary plastic grinding disc, the performance of the grinding disc is low, and it still has a certain cutting effect on the fiber, and the improvement effect on the physical properties of the pulp is not significant

Although it has the advantages of high beating efficiency, good pulp quality, significant energy saving in production, no noise, small equipment volume, and light weight, MC nylon engineering plastics cannot solve the thermal stability of materials. The grinding disc begins to soften and deform at ℃, which greatly reduces the characteristics of engineering plastics and the service life of the grinding disc

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