September 19, 2023

PVA sponge roller has a strong ability to absorb water and water supply capacity, and does not drip after absorbing full water. The PVA sponge itself has many small voids, which are filled with air. When the sponge is pressed to absorb water, it is compressed to discharge its own air, and when it is released, it will return to the original shape at the same time to inhale the original air, on the one hand, there is atmospheric pressure on the one hand, there is water pressure on the other hand,...