TPU (thermoplastic polyurethane) film product preparation method suitable for calendering process

The invention belongs to the field of TPU (thermoplastic polyurethane) film processing, and provides a TPU film product preparation method suitable for a calendering process, which comprises the following steps: at a certain temperature and stirring speed, mixing a TPU product with a plasticizer for plasticizing, after the TPU product completely absorbs the plasticizer, adding a lubricant, and uniformly mixing to obtain a TPU material; and processing the TPU material to form a TPU melt, adding a nucleating agent, and carrying out open milling, filtering, calendaring to form a film, rolling and shaping to obtain the TPU film. According to the invention, a general TPU product with a relatively low melting point and rapid molding is selected, and the hardness and the melting point of the product are reduced through plasticizing treatment of the plasticizer, so that the product can be softened at a lower temperature, and the processing window of the TPU product is widened, so that the TPU meets the requirements o