During the blowing process, the dew point has a certain effect on the film properties. If the dew point is high and the bubble is above the bulge, the bulging of the film is carried out in the liquid state. The dilation only makes the film thinner, but the molecule is not subjected to the tensile orientation, and the properties of the bulging film are close to that of the film. On the contrary, if the dew point is low, the blowout is carried out in the solid state. At this time, the plastic is in the high elastic state, and the bulging is like the transverse tension, which makes the molecular orientation action, so that the blow film performance of the blower is close to the directional film.
The expansion ratio is the lateral expansion ratio of the film. In fact, the film is stretched horizontally. The tensile will produce a certain degree of orientation to the plastic molecules, and the expansion ratio increases, thus the transverse strength of the film is increased. However, the blowing ratio can not be too large, otherwise it will cause instability of the film bubbles, and the film will wrinkle easily.
With the development of science and technology, the demand of the market, the continuous development and production of ABA blowing machine technology, double layer, three layer and multi-layer coextrusion blowing machine are used in all kinds of industries. In the processing and production of plastic bottles, it is necessary to use a professional film blowing machine, which can heat the plastic particles to form a film, and make a variety of different molding bottles, and play a very stable working effect in life, and the type of film blowing machine is especially many, different kinds of machines will achieve different effects in the work. The products produced by using high quality particles will be better, and they are also very clean and have certain tensile effect.
When the mold outlet of the blows is uniform, the glove can be slowly pulled out of the tube billet, and the end of the tube is closed and the intake regulating valve is opened to a small amount of compressed air from the core hole of the mandrel.