How to adjust the meltblown cloth with thin marks somewhere?

For reasons, it is necessary to use acupuncture needles 0.2-0.25 smaller than the spinneret plate by 0.2-0.25. Unblock the melt.

The general air blow die head can adjust the air knife. By adjusting the air knife, just like spunbond, the air volume is adjusted to balance the distribution of fiber filaments. know

Since the melt-blown die head is generally heated by electric channels, it is divided into dozens of individually controlled heating units, which can be adjusted separately to optimize the melt pressure and melt viscosity locally.