ua rau qhov teeb meem:
① The type of resin raw material required for the production of the film blowing machine is wrong, and it is not a film-blown low-density polyethylene resin particle, which does not contain an opening agent or the content of the opening agent is low;
②The temperature of the molten resin is too high and the fluidity is too large;
③ The inflation ratio is too large, resulting in poor opening of the film;
④ The cooling speed is too slow, the film cooling is insufficient, and mutual bonding occurs under the action of the traction roller pressure;
⑤ The traction speed is too fast.
