Setting new standards for smooth surfaces: - Bosch
Setting new standards for smooth surfaces: - Bosch
Setting new standards for smooth surfaces: - Bosch
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18 I Sanding and Polishing<br />
Abrasive components<br />
<strong>for</strong> perfect <strong>surfaces</strong>: Bonding agent.<br />
Bonding agents<br />
Today, sia Abrasives only uses solvent-free bonding systems with additives of different dispersions to<br />
impart fl exibility to suit the application. Using these systems makes it possible to manufacture very tough<br />
and, there<strong>for</strong>e, high-per<strong>for</strong>mance abrasives. But, on the other hand, this also makes it possible to produce<br />
extremely fl exible fi nishing products. Animal glues (hide glue) are only used in very rare cases nowadays.<br />
Base coat<br />
Top size coat<br />
Active abrasive substances<br />
n Base coat<br />
The base coat is used to prefi x the abrasive grains in the<br />
required position and distribution on the backing material.<br />
Synthetic resins are mainly used as the bonding agent,<br />
whereas hide glue has become less important.<br />
n Top size coat and active abrasive substances<br />
The top size coat permanently bonds the abrasive grains to<br />
each other and to the backing material. Synthetic resins are<br />
mainly used as the bonding agent, whereas hide glue has become<br />
less important. Softer, more elastic or harder, tougher<br />
bonding agents are used depending on the application of the<br />
abrasive. The hardness of the bonding agent affects the aggressiveness<br />
and the lifetime of the abrasive.<br />
Active abrasive substances that lower the sanding temperature<br />
are added <strong>for</strong> sanding steel. Additional stearate coatings<br />
also prevent sanding dust from clogging the abrasive surface.
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