Film blow molding device and liquid crystal polymer film prepared therefrom

Abstract

The invention provides a film blow molding device and a liquid crystal polymer film prepared therefrom, and relates to the technical field of blow molding technology. The film blow molding device includes a blow molding unit, a traction adjustment unit and an annealing unit; the blow molding unit includes a thermal insulation box, and the thermal insulation box is coaxially provided with an annular die head and thermal insulation blow molding from bottom to top. At the same time, a traction adjustment unit is arranged on the blow molding unit, and the traction adjustment unit draws the film bubble obtained by blow molding to the annealing unit through the annular opening provided on the upper part of the insulation box. Therefore, through the film blow molding device of the present application, the film blow molding process of the present application can be carried out under the condition of heat preservation, which effectively reduces the cooling and solidification speed of the liquid crystal polymer blank film, and relieves the existing preparation method in blowing liquid crystal. When the polymer film is inflated, it is easy to break the film, the thickness is uneven, and the MD / TD anisotropy of the film is serious.

Description

technical field [0001] The invention relates to the technical field of blow molding technology, in particular to a film blow molding device and a liquid crystal polymer film prepared therefrom. Background technique [0002] 5G communication is an important basic network that will carry ultra-high-speed mobile communication, Internet of Things, artificial intelligence, intelligent transportation, telemedicine and other emerging industries in the future. It has received great attention and continuous investment from major powers in the world. Compared with 4G communication, the biggest features of 5G communication are high frequency, high speed, large bandwidth and low latency. The frequency will gradually transition to above 24GHz, and the overall communication speed will be 100 times that of 4G. [0003] Thermotropic liquid crystal polymer (TLCP) films are considered to be the most suitable radio frequency for 5G terminal electronic devices due to their lower dielectric loss...

AI Technical Summary

Problems solved by technology

[0004] However, due to the extremely fast cooling and solidification speed, strong molecular orientation, and high rigidity of liquid crystal polymers in extrusion molding, traditional film blowing machines that lack targeted process control have problems when blowing liquid crystal polymer films. During the expansion process, it is easy to break the film, uneven thickness, serious anisotropy of film MD / TD, poor flatness and serious folds caused by violent torsion of the bubble film, etc.

[0005] Therefore, research and development of a film blowing molding device for the preparation of liquid crystal polymer film, in order to alleviate the liquid crystal polymer in extrusion molding has extremely fast cooling and solidification speed, strong molecular orientation and high rigidity and other characteristics , resulting in problems such as easy film rupture during the inflation process, uneven thickness, and serious film MD / TD anisotropy when blowing liquid crystal polymer films, which have become very necessary and urgent

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