• Karbosan

    Abrasive products production process begins with
    the selection of high qaulity abrasive raw materials.
    REVIEW


SC - Silicon Carbide


Description: Very hard and brittle abrasive for the surface finish of glass and stone materials, final finish for metal and coatings
Hardness: Very Hard
Durability: Less tough
Structure: Crystalline

Sharp-edged abrasive, coarse, brittle and highly friable micro-wear

AO - Aluminum Oxide


Description: Hard and durable abrasive for grinding of wood, metal and coatings
Hardness: Very Hard
Durability: Tough
Structure: Crystalline, Irregular

Wegde-shaped, block structured abrasive, macro wear

ZR - Zirconia


Description: Hard and very durable abrasive for aggressive grinding of stainless steel, metal and wood
Hardness: Hard
Durability: Very tough
Structure: Crystalline, Regular

Wegde-shaped, block drop formed abrasive, micro wear, self-sharpening

CE - Ceramic


Description: Hard and very durable, long lasting and self-sharpening abrasive for machining of high alloy steel and stainless steel
Hardness: Hard
Durability: Very tough
Structure: Microcrystalline

Sharp-edged, pointed abrasive, micro wear, self-sharpening

Coating


6 - Extra Coating
7 - Surface Coating
8 - Abrasive
9 - Main Coating
10 - Backing

Coating: Extra Coating

Coating Type: Stearate Coating
Description: Friction and heat absorbant (cooler effect) Top Size coating that enhances the performance.

Coating Type: Top Size Coating
Description: Anti-clogging (slipping effect) Stearate coating that enhances the performance.

Coating Type: Special Coating
Description: Friction and heat absorbant (cooler effect) Special coating that enhances the performance.

Coating: Surface Coating

Coating Type: Size Coating
Description: Coating that bonds abrasive grains to the main coating.

Coating: Main Coating

Coating Type: Make Coating
Description: Coating that bonds abrasive grains to the backing. Electrostatically applied for optimum bonding.

Coating: Antistatic

Coating Type: Antistatic Coating
Description: Electrode loads occur during grinding process of different materials, as a result, non-conductive materials such as wood adhere to the sanding surface and may adversely affect sanding performance. To avoid this, backings are selected from antistatic materials and coated with antistatic properties.

Gravity Coating


Abrasive grains drop randomly on the backing, coated by the gravitational force. Mechanically coated abrasives with gravity coating are less aggressive and material removal performance is not very high.

Electrostatic Coating


Abrasive grains are electrostatically charged and set up perpendicularly on the backing with the main coating. The abrasives coated with electrostatic coating are much more aggressive. Products with gravitational coating and electrostatic coating are defined as split layers. If two different types of abrasives are used split layer (both gravity and electrostatic coating) is applied, if 100% one type of abrasive is used only electrostatic coating is applied. Time to time only gravity coating can be applied according to the size of the abrasive grain sizes.

Closed Coating


If the backing surface is completely covered with abrasive grain, it is called as Closed Coating.

Semi-Open / Open Coating


If the backing surface is coated with 75% of abrasive grains, it is called Semi-Open Coating; if it is coated with 50% of abrasive grains, it is called Open Coating.

Product Selection and Storage Conditions


In selection of the coated abrasive, material type of the workpiece to be sanded, type of the machine to be used in the application and the form in which the coated abrasive is to be used in this machine are very important. Accordingly, backing type, abrasive type and abrasive grain size are selected.

Some important parameters affecting the abrasive performance are; antistatic feature of the coated abrasive, the suitability for wet use, the special coating to prevent heat and clogging and flexibility/stiffness.

For high stock removal and long life, it is important that the coated abrasive has a flexible structure and the abrasive grains are not filled with workpiece.

Once the coated abrasive production is complete, stiffness must be reduced. This is achieved by softening the backing to a more elastic structure, providing abrasive grains to work more independent and high performance.
Temperature and humidity in storage conditions can cause the coated abrasive to curl over time.

Convex curl may occur if the air is less nephew than the backing material.
Concave curling can occur if the air is more nematic than the backing material.

Observe the following for storage conditions;

• Coated abrasives should not be stored in open areas for long time.
• Direct sunlight should be avoided where there are sudden changes in temperature and humidity levels.
• Extra precautions should be taken during seasonal changes of sudden temperature changes.
• The ideal storage condition is 45-65% at humidity level and 15-25 °C at temperature level.