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Film blowing machine film blowing problems

A customer encountered such a problem: the surface of the film blown by the film blowing machine is not smooth, like frosted glass, and sometimes produces fine ripples and unevenness.
So how to solve it?
Below Debang Machinery has sorted out five methods to solve the problem of uneven film surface

① The die design is unreasonable and the shaping section is too long.
② The die gap is too small, and the melt breaks during extrusion. The die should be selected to adapt to the raw material.
③ The die temperature is too low, increase the temperature.
④ The extruder is not mixed enough. Check the temperature, filter, etc.
⑤ There is carbonized resin in the die, which makes the discharge disordered, and the die should be cleaned.