Analysis and solution of common problems in blowing film (2 (injection molding products)

2, the film transparency is poor

Reason 1: Low extrusion temperature, poor plasticization of resin, resulting in poor transparency of the film after blowing;

Reason 2: blow ratio is too small;

Reason 3: The cooling effect is not good, which affects the transparency of the film;

Reason 4: The moisture content in the resin raw material is too large;

Reason 5: The traction speed is too fast and the film is not cooled enough.

solution
① Appropriately increase the extrusion temperature, so that the resin can be uniformly plasticized;

② Increase the blowing ratio appropriately;

③ Increase the air volume and improve the cooling effect;

④ drying of raw materials;

⑤ Reduce the traction speed appropriately.