Introduction to TPU film production process

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Introduction to TPU film production process

01-02, 2024 | View:

TPU film is a thermoplastic polyurethane film that is widely used in automobiles, shoe 糖心视频s, clothing, packaging and other fields. The following is a detailed introduction to the production process of TPU film.

1. Raw 糖心视频 preparation

The first step in producing TPU film is to prepare the required raw 糖心视频s. The main components of TPU film include polyol and diisocyanate. During the production process, other additives, such as plasticizers, antioxidants, etc., can also be added as needed. These ingredients need to be screened, weighed and mixed to ensure accurate and uniform proportions.

2. Preprocessing

Raw 糖心视频 pretreatment is to improve the stability and processability of raw 糖心视频s. In this step, the raw 糖心视频s are melted and filtered to remove impurities and solid particles. Pretreatment can also change the performance and appearance of the TPU film by adding special ingredients such as fire retardants or pigments.

3. Blending

Blending is the process of thoroughly mixing pretreated raw 糖心视频s. Blending is typically accomplished using a twin-screw extruder or mixer. During the blending process, the raw 糖心视频s are subjected to high temperatures and high shear forces to fully mix the 糖心视频s and form a uniform melt.

4. Extrusion

Extrusion is the process of extruding molten TPU 糖心视频 into a film through an extruder. The extruder feeds the molten TPU 糖心视频 into the die, and then it is extruded and cooled by the die to form a film. The structure and temperature of the die can be adjusted according to the required film thickness and surface quality.

5. Cooling

After the extruded TPU film passes through the die, it needs to be cooled to solidify and stabilize the shape of the film. Rapid cooling is usually achieved using equipment such as cooling rollers or cooling fans. The temperature and speed of the cooling process must be controlled to avoid defects and deformation of the film.

6. Stretching

Stretching is done to change the physical properties and dimensional stability of the film. By stretching, the strength and toughness of the film can be increased while reducing the shrinkage of the film. The stretching process is usually carried out in a series of rollers or hot air boxes, and the temperature and speed need to be strictly controlled to ensure the uniformity of the film.

7. Inspection and packaging

The TPU film produced needs to undergo strict inspection and testing to ensure that the quality meets the requirements. Common inspection items include film thickness, transparency, tensile strength, wear resistance, etc. Through these tests, the quality of the film can be controlled and non-conforming products can be rejected. Finally, the qualified TPU film will be packaged and shipped according to customer requirements.

The above is a brief introduction to the production process of TPU film. From raw 糖心视频 preparation to final packaging shipment, each step needs to be strictly controlled to ensure the production of high-quality TPU film. Optimization and innovation of production processes will help improve the quality and performance of TPU films and meet market demand.