Film blow molding device and liquid crystal polymer film manufactured by same

A liquid crystal polymer and molding device technology, applied in the field of blow molding technology, can solve the problems of easy film breakage, serious film anisotropy, poor flatness of bubble film, etc., and achieve the effect of reducing the cooling speed

Active Publication Date: 2021-09-17
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, resear

Method used

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  • Film blow molding device and liquid crystal polymer film manufactured by same
  • Film blow molding device and liquid crystal polymer film manufactured by same
  • Film blow molding device and liquid crystal polymer film manufactured by same

Examples

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preparation example Construction

[0072] According to one aspect of the present invention, a kind of preparation method of above-mentioned liquid crystal polymer film, described preparation method comprises the following steps:

[0073] The molten liquid crystal polymer resin is extruded through the annular die head 111, and the extruded tubular blank film is blown under the heating gas blown out by the heat preservation blow molding air ring 112 to form a film bubble; The upper annular opening of the cylinder 113 and the heat preservation box 11 leads to the traction adjustment unit 2; then the traction adjustment unit 2 draws the blown bubbles to the annealing unit 3 to obtain a formed liquid crystal polymer film.

[0074] The preparation method of the liquid crystal polymer film provided by the present invention, the preparation method first extrudes the liquid crystal polymer resin in the molten state through the annular die head 111, and the extruded tubular blank film is heated in the thermal insulation b...

Embodiment 1

[0081] Such as figure 1 and figure 2 As shown, a film blow molding device, the film blow molding device includes a blow molding unit 1, a traction adjustment unit 2 and an annealing unit 3;

[0082] The blow molding unit 1 includes an insulated box 11, and the insulated box 11 is coaxially provided with an annular die head 111, an insulated blow molding air ring 112 and a fixed-diameter insulated cylinder 113 in sequence from bottom to top;

[0083] The annular die head 111 is communicated with the extrusion outlet pipeline of the extruder 4;

[0084] The heat preservation blow molding air ring 112 communicates with the fan 5 through the heating pipe 114;

[0085] The traction adjustment unit 2 is arranged on the blow molding unit 1 , and the traction adjustment unit 2 draws the film bubble obtained by blow molding to the annealing unit 3 through the annular opening provided on the upper part of the heat preservation box 11 .

[0086]The film blow molding device of this em...

Embodiment 2

[0105] A kind of liquid crystal polymer film, described liquid crystal polymer film is made by the film blow molding device described in embodiment 1;

[0106] The preparation method of the liquid crystal polymer film comprises the following steps:

[0107] (1) The liquid crystal polymer resin is subjected to vacuum drying treatment in a vacuum oven, the treatment temperature is 140-160° C., and the treatment time is 4-12 hours. The liquid crystal polymer resin is mainly synthesized by 73% p-hydroxybenzoic acid and 27% 6-hydroxy-2-naphthoic acid through solid-state polycondensation method, and a small amount of third monomer can also be introduced on the basis of the above two monomers, the resin The melting point is 280-283°C.

[0108] Subsequently, the dried liquid crystal polymer resin raw material is melted at a barrel temperature of 280-295° C. through a single-screw extruder 4 to make it uniformly plasticized. The diameter of the screw is 35 mm, and the aspect ratio is ...

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Abstract

The invention provides a film blow molding device and a liquid crystal polymer film manufactured by the same, and relates to the technical field of blow molding processes. The film blow molding device comprises a blow molding unit, a traction adjusting unit and an annealing unit. The blow molding unit comprises a heat preservation box body, and an annular mold head, a heat preservation blow molding air ring and a sizing heat preservation cylinder are sequentially and coaxially arranged in the heat preservation box body from bottom to top; and meanwhile, the traction adjusting unit is arranged on the blow molding unit, and the traction adjusting unit pulls film bubbles obtained through blow molding to the annealing unit through an annular opening formed in the upper portion of the heat preservation box body. Therefore, by means of the film blow molding device, the film blow molding process can be conducted under the heat preservation condition, the cooling and curing speed of a liquid crystal polymer blank film is effectively reduced, and the problems that when a liquid crystal polymer film is blown through an existing preparation method, the film is prone to being broken in the blowing process, the thickness is uneven, and the MD/TD anisotropy of the film is serious are solved.

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 emerging industries such as ultra-high-speed mobile communication, Internet of Things, artificial intelligence, intelligent transportation, and telemedicine in the future. It has received great attention and continuous investment from major countries in the world. Compared with 4G communication, the biggest features of 5G communication are high frequency, high speed, large bandwidth and low latency. Among them, 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) film is considered to be an ideal choice for 5G terminal electronic equipment due to its lower dielectric loss (l...

Claims

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Application Information

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IPC IPC(8): B29C48/10B29C48/00B29C48/355B29C48/885
CPCB29C48/10B29C48/0017B29C48/355B29C48/885
Inventor 王雄伟周玉波
Owner NINGBO CHANGYANG TECH
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