How to make a round hole in plastic film
If it is a single film, according to the size of the round hole, such as round cans (middle cut) hollow metal objects after heating at the punch press in. It's easy to make a round hole.
If it is a film with perforated, hollow metal objects will need to choose according to the size of the round hole relatively hard round, such as diameter of the pipe. Similarly, after heating quickly and vigorously press (weight hit), in need of drilling position, with more drilling, the need for speed is very fast, the instantaneous strength can be great, otherwise the film will scorch damaged.
