1. What is Brushing?

The brushing process involves using brushing equipment to rub back and forth on the wood floor surface, creating some non-linear striped patterns. In another words, it uses a steel wire wheel to deepen the wood grain on the surface of the wood floor, forming distinct stripes and enhancing the texture of the floor.

Brushing is suitable for most hardwood species, especially ring-porous or semi-ring-porous woods with coarse vessel elements like oak and elm, which can exhibit prominent grain styles.

2. Introduction to Brushing Equipment

The key component of brushing equipment is the roller brushes, which use steel wire rollers and nylon rollers to scrape off the soft tissues like parenchyma cells in the wood, highlighting the wood texture.

2.1 Types of Roller Brushes

Steel Wire Roller Brush: Steel wire brushes have appropriate density and elasticity. After strict dynamic balancing and outer circle trimming, the brushed flooring surface shows beautiful and uniform natural 3D wood grain.

Nylon Roller Brush: Made from imported nylon filaments embedded with abrasive sand, these brushes have suitable density and elasticity. After strict dynamic balancing and outer circle trimming, the brushed flooring surface is cleaned of wood dust and wood fibers, making the previously formed 3D wood grain more smooth and distinct.

2.2 Roller Brush Configuration

The diameter of the steel wires in the roller brush ranges from 0.6mm to 0.2mm. Different wire diameters create varying friction on the wood surface. By arranging roller brushes with different diameters and adjusting the central height of the rollers to control the positive pressure on the board surface, the depth of the brushing can be controlled.

In the brushing process, different rollers rotate in different directions. Rollers that rotate opposite to the board’s running direction effectively rub the surface to form texture, while rollers rotating in the same direction as the board’s running direction serve to remove burrs and clean the surface.

Due to the unevenness of the wood surface, the texture effect on brushed boards vary a lot. If the texture is too light, the brushing process needs to be repeated. If the texture is too deep, sanding is required.

3. How is Embossing Done?

The embossing process uses brushing to highlight the early wood and late wood boundaries on the wood surface, creating a varied depth effect. Embossed flooring displays a more rugged and natural decorative effect indoors.

From the video, it is evident that compared to ordinary brushing production lines, embossing equipment only has five roller brushes, and the conveyor belt speed is much slower. The roller brushes apply greater positive pressure on the surface to create deeper texture. Among the five roller brushes, the first three are steel wire brushes with wire diameters ranging from 0.6mm to 0.3mm, while the last two are rollers for specific processing.

To achieve uniform embossing texture, the embossing process need repeating three times, followed by one more brushing process to create richer and more detailed textures.

4. Finishing on Brushed Flooring 

To keep the texture after brushing, the painting process for brushed products differs from that of ordinary matte ones. Compared to the regular painting process for flat products, brushed floors omit the putty filling primer at the very first beginning.

The abrasion resistance and peel resistance of the flooring coating film are contributed by both the primer and the top coating. Despite the different painting process, the paint film of brushed flooring still possesses good abrasion resistance and peel resistance. Therefore, there is no need to worry excessively about being worn out.

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