Two production categories of MDF: sanding and calendering
In the production process of flame retardant MDF, we usually hear the words of sanding, calendering and so on. Many novices in the industry don’t know what is sanding flame retardant MDF and what is calendering flame retardant MDF? What’s the difference between them?
Sanding is to make the surface of the plate smooth and increase the strength of the surface, uniform thickness, suitable for various veneer technology, suitable for various standard structural parts, easy to decorate and make tools.
Sand polishing, as its name implies, is a calendered board. In order to get a board which can be easily sanded with a sander for pasting decorative materials, have you ever seen a bicycle tire repaired? The tire will be polished by the mechanic in order to stick on the rubber. So, in general, sandboards are a little thinner than calenders.
As for the grade of MDF, there are two aspects. On the one hand, it refers to the environmental protection grade E1 and E2 of flame retardant density board, or the quality is superior board, first-class board, etc.
Calendering is the hot pressing or cold pressing of an object by means of rollers, with the aim of improving the surface finish of the object. Calendering process has a wide range of uses: flame retardant density plate production, mechanical processing, printing, textile, metallurgy are used calendering process.
The above understanding of the definition of calendering, sanding flame retardant density board, then their respective should not say much, the most basic difference is that the surface treatment methods are different, thus suitable for different industry applications.
As for the choice of calendering or sanding when purchasing, it depends on your own needs and products.