Products

Sandpaper is a type of coated abrasive and is the most common type of flexible abrasive. It consists of a paper or fabric backing with a layer of abrasive grain applied to one side. Sandpaper is very popular due to its versatility. It is designed for manual and machine processing of metals, wood, and plastics; removing defects and contaminants from various surfaces of any shape; removing old paint and varnish coatings and preparing surfaces for new ones, etc.

Sandpaper is produced in rolls. These rolls are used to manufacture products such as endless sanding belts, sanding sheets, Velcro sanding discs (Velrco), fiber discs, inserts for sanding pads, and more.

Abrasive grain material

Aluminum oxide (corundum) is the most inexpensive and versatile option. It is widely used for manual applications but is also suitable for machine processing. It is produced in a full range of abrasive grains, from coarse to fine. It is primarily used for removing paint and varnish, rust, woodworking, and for light metalworking and surface smoothing. Its primary machine application is woodworking.

Ceramic aluminum oxide is a new type of abrasive. Available in medium-coarse and very coarse grits, it offers superior performance in metalworking. Because it is synthetically produced, it has a more uniform grain size. Its self-sharpening effect ensures consistently sharp grains, reducing cutting temperatures and significantly extending the life of the abrasive paper, allowing it to be used to its full potential. Grains with varying degrees of brittleness are produced for different application conditions.

Silicon carbide – most often used on a waterproof base. It has proven itself to be particularly effective for fine finishing of wood, plastic, glass, non-ferrous metals, and sanding paintwork (especially in auto body repair).

Zirconium corundum – a mixture of zirconium oxide and corundum – offers a good price-performance ratio. It is used in high-quality abrasive papers. It has proven itself effective in processing various steels, including high-alloy and stainless steels. Its drawbacks include the need for high specific pressure to break the grain and renew the sharp edges of the abrasive. Therefore, this material is not used for processing wood.

Open and closed sanding belts

Based on the density of the abrasive coating, sandpapers are classified as open or closed. If the abrasive coating covers 50-70% of the surface, it is called an open coating. This type of coating is designed to reduce clogging. Therefore, they are used for processing soft woods and paints. Closed coating means that more than 70% of the surface is covered with abrasive. These types of sandpaper are better suited for processing metals and glass. They provide maximum processing performance but can become clogged with sludge.

Bundle

Various types of adhesives are used to hold the abrasive to the tape, and their properties can vary significantly. Some adhesives are waterproof, while others are not. The differences between adhesives are as significant as the differences between abrasives.

Base material

There are two main types of sandpaper backing material: paper and fabric. Fabric backing can be made of cotton or polyester. Other backing materials are also available, including combinations (paper and fabric), vulcanized fiber, and plastic films.

Paper bases differ in density A, B, C, D, E, F, T. From A to T the paper density increases.

Fabric bases are marked with Latin letters from F to Y and their combinations.

F and J are flexible backings, while X and Y are rigid. Cloth-backed sandpaper has the widest range of applications, although it is somewhat more expensive than paper sandpaper. Cloth-backed sandpaper is used to make endless sanding belts and flap wheels. It's important to note that cloth sandpaper can be waterproof or not.

Vulcanized fiber (non-woven abrasives) is based on cellulose and is used to produce fiber wheels and heads.

Grain application technology

There are two methods for applying abrasive to the backing: free placement and electrostatic. With the electrostatic method, an electric charge is created in the grain, which attracts the abrasive grains to the backing via their positive pole and ensures their orientation.

When manufacturing abrasive paper, additional additives may be used, typically zinc or calcium stearates, to reduce belt clogging, lower the temperature in the contact zone, and thereby extend its service life. Additives also vary the color of the paper.