The production process of waterproof polyester knit fabric laminated with film typically involves the following steps:

1. Knitting: Polyester yarn is knit into a fabric using a circular knitting machine.

2. Lamination: The knit fabric is then laminated with a waterproof film using a process such as heat bonding or chemical bonding.
   

3. Quality control: The laminated fabric is inspected for defects and quality.

4. Cutting and sewing: The laminated fabric is cut into the desired shape and sewn into the final product, such as clothing, gear, or equipment.

5. Finishing: The final product is finished with additional details, such as zippers, seams, and trimmings.

6. Testing: The finished product is tested to ensure its waterproof and breathable properties.

Note: This is a general overview of the production process and may vary depending on the specific product and manufacturer.