A study on the relationship between rubbing scratches on an alignment film and rubbing cloths using a high-speed camera

Figures & data

Figure 1. Schematic illustration of a high-speed camera mounted on the rubbing machine.

Table 1. Three types of rubbing cloth used in the experiments.

Pile material	Pile density (piece/cm^2)	Pile diameter (μm)	Cloth thickness (mm)
Cotton	320	112	2.5
Rayon	800	100	1.65
Polyester	420	88	2.10

Figure 2. Snapshot of the cotton rubbing piles in contact with the substrate. Photographed with a high-speed camera.

Figure 3. Topographic image of the surface of the alignment film rubbed with the cotton cloth.

Figure 4. Snapshot of the rayon rubbing piles in contact with the substrate. Photographed with a high-speed camera.

Figure 5. Topographic image of the surface of the alignment film rubbed with the rayon cloth.

Figure 6. Snapshot of the polyester rubbing piles in contact with the substrate. Photographed with a high-speed camera.

Figure 7. Topographic image of the surface of the alignment film rubbed with the polyester cloth.