High molecular polyethylene board
High-molecular polyethylene board, one kind of wet coal powder is first adhered on the wall of the warehouse, and the layers are stacked on top of each other to form a rat hole-like shape in the warehouse. Refilling the coal will cause blockage; The internal friction resistance between the wet coal powder is large, and the external friction resistance between the wet coal powder and the bunker wall is also large. When the coal bunker is full of coal, the coal outlet of the lower tapered section is similar to a stuck and rusted Arch shape (commonly known as bridge). When opening the gate to put coal, only a small part can be put down, and the upper coal is blocked due to arching.