1 thought on “What is the cause of uneven thickness of LDPE film blowing film?”
Debra
Hello, I am more familiar with this, let me answer it for you. If according to the experience of many years of film industry to determine the following reasons: 1. The uniformity of the gap in the mold mouth directly affects the uniformity of the thickness of the film. In some parts, the gaps are smaller, so that the amount of crowding is small. As a result, the thickness of the film formed is not consistent, some parts are thin, and some parts are thick; Uniform, high and low, so that the thickness of the film after blowing is uneven; 3, the air supply volume around the cooling rings is inconsistent, resulting in uneven cooling effect, which makes the thickness of the film unevenness; 4, the expansion ratio and the traction ratio are not matched, making the thickness of the membrane foaming difficult to control; 5 the traction speed is unstable and constantly changes, which will of course affect the thickness of the film. This to adopt, thank you.
Hello, I am more familiar with this, let me answer it for you.
If according to the experience of many years of film industry to determine the following reasons:
1. The uniformity of the gap in the mold mouth directly affects the uniformity of the thickness of the film. In some parts, the gaps are smaller, so that the amount of crowding is small. As a result, the thickness of the film formed is not consistent, some parts are thin, and some parts are thick; Uniform, high and low, so that the thickness of the film after blowing is uneven;
3, the air supply volume around the cooling rings is inconsistent, resulting in uneven cooling effect, which makes the thickness of the film unevenness;
4, the expansion ratio and the traction ratio are not matched, making the thickness of the membrane foaming difficult to control;
5 the traction speed is unstable and constantly changes, which will of course affect the thickness of the film.
This to adopt, thank you.