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A kind of preparation method of liquid crystal polymer film

A liquid crystal polymer and polyimide film technology, applied in melt spinning, fabric surface trimming, heating/cooling fabrics, etc., can solve the problems of high equipment requirements, inability to continue transverse strength, etc., and achieve simple preparation process, The effect of weak adhesion and excellent product performance

Active Publication Date: 2022-07-05
四川东方绝缘材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art. In view of the shortcomings of the prior art processing methods such as high equipment requirements, inability to continue and low transverse strength, by using the LCP for spinning treatment, using non-woven Fabric processing technology, and then the formed non-woven fabric is processed into a film by continuous rolling, so as to provide a simple equipment and continuous production. The obtained LCP film has high transverse strength and thin film thickness. And adjustable, the preparation method of the liquid crystal polymer film (being LCP film) with good film toughness

Method used

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  • A kind of preparation method of liquid crystal polymer film
  • A kind of preparation method of liquid crystal polymer film
  • A kind of preparation method of liquid crystal polymer film

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a liquid crystal polymer film, the steps are as follows: adding a mixture of LCP resins C950 and E950i (with a mass ratio of 1:1) into a drying tank, and drying at 150° C. for 4 hours. Then put the dried resin into the melt spinning equipment, the extrusion temperature is 350 ° C, the hot air pressure is 0.2 MPa, the cold drum temperature is 15 ° C, and then the film is formed by hot pressing with two rolls, and the temperature of the preheating roll is is 280°C, the temperature of the hot pressing roll is 350°C, both sides are protected by polyimide film (thickness is 0.188mm), the line pressure of the roller is 120daN / cm, and the temperature of the cooling roll is 170°C. After manually peeling off the polyimide film, the LCP film was subjected to high-temperature heat treatment at a temperature of 240 °C and a vehicle speed of 3.5 m / min. After cooling, the LCP film is wound.

Embodiment 2

[0033] A method for preparing a liquid crystal polymer film, the steps are as follows: adding LCP resin A950 into a drying tank and drying at 150° C. for 4 hours. Then put the dried resin into the melt spinning equipment, the extrusion temperature is 300 ℃, the hot air pressure is 0.1 MPa, and the cold drum temperature is 35 ℃, and then the film is formed by hot pressing with two rolls, and the temperature of the roll is preheated. It is 250℃, the temperature of the hot pressing roll is 300℃, both sides are protected by polyimide film (thickness is 0.15mm), the line pressure of the roll is 90daN / cm, and the temperature of the cooling roll is 160℃. After manually peeling off the polyimide film, the LCP film was subjected to high-temperature heat treatment at a temperature of 220 °C and a vehicle speed of 1.5 m / min. After cooling, the LCP film is wound.

Embodiment 3

[0035]A preparation method of a liquid crystal polymer film, the steps are as follows: adding LCP resin KD100 into a drying tank and drying at 150° C. for 4 hours. Then put the dried resin into the melt spinning equipment, the extrusion temperature is 300 ° C, the hot air pressure is 0.5 MPa, the cold drum temperature is 20 ° C, and then the film is formed by hot pressing with two rolls, and the temperature of the preheating roll is It is 245 ℃, the temperature of the hot pressing roll is 295 ℃, the two sides are protected by polyimide film (thickness is 0.188mm), the linear pressure of the roll is 60daN / cm, and the temperature of the cooling roll is 200 ℃. After manually peeling off the polyimide film, the LCP film was subjected to high-temperature heat treatment at a temperature of 230 °C and a vehicle speed of 5 m / min. After cooling, the LCP film is wound.

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Abstract

The invention discloses a method for preparing a liquid crystal polymer film, which is characterized by the steps of: putting dried LCP resin into melt spinning equipment, and performing melt spinning by compressed air to obtain LCP fibers formed by melt blowing; Cool, and then cool and set on a large cold drum to form LCP non-woven fabric; protect both sides of the LCP non-woven fabric with polyimide film, and then pass through the first group of preheating rollers and the second group of hot pressing rollers in turn for heating. Pressing, then cooling through cooling rollers to obtain a three-layer composite film; peeling off the polyimide film to obtain an LCP film; heat treatment in a high-temperature furnace and cooling to obtain a liquid crystal polymer film. By adopting the invention, the equipment is simple and continuous production is possible, and the prepared LCP film has the characteristics of high lateral strength, thin and adjustable film thickness, good film toughness, etc. Charging insulation sheets and other fields.

Description

technical field [0001] The invention belongs to the preparation of organic polymer compounds, and relates to a preparation method of a liquid crystal polymer film. As a high-functional film, the liquid crystal polymer film prepared by the invention has the characteristics of high mechanical strength, uniform longitudinal and transverse tensile strength, good folding resistance and the like, and can be widely used in high-frequency and high-speed copper-clad laminates, solar cell back sheets, wireless charging Insulation sheets, etc. Background technique [0002] Liquid Crystalline Polymer (LCP for short) is a kind of special engineering plastic with excellent performance developed in the 1970s. Its structure is composed of rigid molecular chains, which can present the fluidity of existing liquid under certain physical conditions. There are also polymer materials with anisotropic state of physical properties of crystals. Liquid crystal polymers have high strength, high modu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/009D01D5/08D04H3/14D06C7/00
CPCD04H3/009D01D5/08D04H3/14D06C7/00Y02P20/10
Inventor 唐荣芝王志娟侯明柯希斌周柯罗春明唐安斌
Owner 四川东方绝缘材料股份有限公司
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