HIPS (High-Impact Polystyrene) rigid film offers several advantages when used in the thermoforming process. Here are some key benefits:

1. **Cost-Effective**: HIPS is generally less expensive compared to other materials like PVC or PET, making it an economical choice for large-scale production.

2. **Ease of Thermoforming**: HIPS has good formability and can be easily shaped into various designs and contours during the thermoforming process. It does not require high temperatures to soften, which simplifies the manufacturing process.

3. **Dimensional Stability**: HIPS exhibits excellent dimensional stability, meaning it maintains its shape and size over time, even under varying environmental conditions. This property ensures that the final product remains consistent in quality and appearance.

4. **Good Impact Resistance**: Despite being a rigid material, HIPS has relatively good impact resistance compared to regular polystyrene. This makes it suitable for applications where durability is important.

5. **Surface Finish**: HIPS can be produced with a smooth surface finish, which is aesthetically pleasing and can be easily printed on or decorated. This makes it ideal for packaging and display applications.