Disposable plastic film coating device

The utility model discloses a disposable plastic film coating device which is characterized by comprising a suction tube, an extrusion suction part communicated with the suction tube and a film forming part communicated with the extrusion suction part, a film coating opening is formed by an opening in the bottom face of the film forming part, and a film forming groove penetrating through the bottom end wall of the film forming part is formed in the bottom end of the film forming part. The disposable plastic film coating device is used during sample preparation before chemical detection, and compared with the prior art, the film coating device overcomes the defects occurring when liquid substances are coated at present, and has the benefits that operation is convenient and rapid, the thickness of a wet film is easy to control, generated organic liquid hazardous waste is few, the usage amount of organic solvents is reduced, and the labor cost is saved. 本实用新型公开了一种一次性塑料涂膜器，其特征在于：包括吸管、与吸管连通的挤压吸取部，与挤压吸取部连通的成膜部，所述成膜