Low Price White Fused Alumina For Refractory Malaysia

The stretching is based on the proper moisture content of the fabric(white aluminum oxide 80 grit). The edge of the cloth is gradually widened by mechanical clamping, and then it is slowly dried to obtain a temporary setting. However, the width of the fabric before and after stretching has certain limitations. If the width is too large, it will cause serious shrinkage(white alumina powder). This method uses double roll extrusion to control the sizing thickness, among which the main ones are. 

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This method is the same as the impregnation method, but there is no impregnation roller(white aluminum oxide). The pressure of the squeezer or scraper directly affects the sizing rate. The calendering effect mainly depends on the pressure and temperature of the roller, but it must also be controlled to some extent; otherwise, it will damage the cotton fiber and reduce the strength(20 mesh aluminium oxide grit). Drying can be done directly by stretching, or by drum drying, and then stretching.

Therefore, it is necessary to select an extrusion roller with appropriate diameter or a scraper with appropriate thickness(brown fused aluminum oxide). Therefore, when the fabric speed increases, the pressure of extrusion roller or scraper should be increased. Before calendering, the fabric should be kept at a certain humidity, generally 10-15%(brown aluminium oxide grit). Therefore, it is not suitable to dry too much when drying, otherwise, it must be humidified before calendering.

Generally, the substrate of coated abrasives is dyed with direct dyes(white aluminium oxide). When the fabric passes through the extrusion roller (or between the scraper and the rubber roller or the belt), the slurry will penetrate. Covering slurry forms a smooth and tough film on the surface of the fabric, which makes the hairiness stick(silicon carbide companies), the proportion of covering slurry is larger, the yarn line dry and smooth, the friction coefficient reduces and the rigidity increases.

Before the fabric passes through the contact point of the extrusion roller, the slurry will only adhere to the surface of the fabric, almost no penetration into the fabric(black aluminum oxide). When the fabric passes through the contact point, the slurry is replaced with the air in the fabric, and one part of the slurry seeps into the fabric, which is called infiltration slurry(white aluminium oxide 180/220); the other part of the slurry adheres to the surface of the fabric, which is called covering slurry.

How does the slurry adsorb on the surface of the fabric(white fused alumina)? The penetrating slurry penetrates into the interior of the fabric, fills the gaps between the fibers, increases the cohesive force between the fibers, increases the breaking strength, and reduces the elasticity and extension(green carborundum). It is the basis for the stability of the size film. Both permeate and overlay are important. They are indispensable and should have a certain proportion.

Too little permeate will make the size film not wear-resistant, not firmly bonded and easy to fall off(pink aluminum oxide); too much permeate will cause great damage to the original properties of the fabric, too much elastic loss and brittle. Therefore, it is necessary to master all kinds of sizing conditions(aluminum oxide blast media), so as to ensure the uniformity and suitability of the sizing amount, and ensure the proper proportion of the permeate slurry and the covering slurry.

There are many factors that affect sizing(white corundum): using scraping method, while the proportion of penetrating slurry is less; using impregnation method, the proportion of penetrating slurry is larger, while the proportion of covering slurry is less. In the scraping method, the proportion of penetration slurry is increased in the following order(silicon carbide price): scraper method 1 → scraper belt method 1 → scraper rubber roller method 1 → rubber roller method.