Packaging industry, and so did the blown film industry the rapid development of the unit

One of blown film production process control points, refers to the membrane after blowing bubble diameter and not blowing the ratio between the pipe ring diameter. Blowing ratio of thin films of lateral expansion ratio, is actually to transverse tensile membrane, will have a certain degree of orientation effect of plastic molecules, blowing ratio increases, so that the film the transverse strength of progress. Blowing ratio, however, also cannot too big, otherwise easily cause membrane bubble is not stable, and the film appear easily ruffled. The blowing ratio, therefore, should work with traction than appropriate, in general, low density polyethylene (LDPE) film blowing ratio should be controlled in 2.5 ~ 3.0 is advisable. Traction traction than refers to the film speed and the ratio between the pipe ring extrusion speed. Drawing ratio is longitudinal draw ratio, make the film has a directional role in the leading direction. Traction ratio increases, the longitudinal strength and progress, and the thickness of the thin film thinning, but if excessive traction than, the thickness of the thin film is hard to control, and may even film break, broken film phenomenon. Low density polyethylene (LDPE) film of traction control than normal between 4 ~ 6 is advisable.

Dalian blown film line with package property and coherent with the industry's growth, though western film retains the local market share, but it was already means necessary to satiety flexible packaging, second floor, three layer and multi-layer co-extrusion film has low capital, good comprehensive performance, stability and environmental protection and other characteristics, widely used in food packaging category, is deep the customer and customer satiety, has the very good growth prospects. V, else, cooking film, anti-static film and high isolation resistance film, nano film... Function sex plastic packaging film has become the direction and target of the people to play. And to have ambition in the film as a result, the coherent blown film and co-extrusion composite configuration is necessary to the base of satiety difference requirements. Roughly blown film configuration to produce ordinary bags, agricultural film, packaging, waste can be satiety low-end products is necessary; Resolution of co-extrusion composite configuration of two kinds of different performance of thin film, big fierce progress its physical properties, increased strength, make the film has excellent isolation resistance, air tightness and transparency; Due to the high insulated food packaging film, packaging bags, etc., are necessary to two or more of the film for co-extrusion composite, in order to reach moisture, anti-fouling, anti-counterfeiting, folding resistance, abrasion resistance, etc.A