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Preparation method of liquid crystal polymer thin film

A technology of liquid crystal polymer and polyimide film, which is applied in the direction of melt spinning, fabric surface trimming, heating/cooling fabric, etc., can solve the problems of uncontinuous transverse strength and high equipment requirements, and is conducive to large-scale industrialization The production and preparation process is simple and the operability is strong

Active Publication Date: 2020-07-24
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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  • Preparation method of liquid crystal polymer thin film
  • Preparation method of liquid crystal polymer thin film
  • Preparation method of liquid crystal polymer thin film

Examples

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Effect test

Embodiment 1

[0031] A method for preparing a liquid crystal polymer film, the steps are: adding a mixture of LCP resins C950 and E950i (mass ratio: 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 0.2MPa, the cold drum temperature is 15°C, and then the film is formed by hot pressing with two rollers. The temperature is 280°C, the temperature of the hot pressing roll is 350°C, both sides are protected by polyimide film (thickness 0.188mm), the line pressure of the roll is 120daN / cm, and the temperature of the cooling roll is 170°C. After the polyimide film was peeled off manually, the LCP film was subjected to high-temperature heat treatment at a temperature of 240°C and a vehicle speed of 3.5m / min. After cooling, the LCP film is wound up.

Embodiment 2

[0033] A method for preparing a liquid crystal polymer film, the steps are: adding LCP resin A950 into a drying jar, 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 0.1MPa, the cold drum temperature is 35°C, and then the film is formed by hot pressing with two rollers, and the temperature of the preheating roller is The temperature is 250°C, the temperature of the hot pressing roll is 300°C, both sides are protected by polyimide film (thickness 0.15mm), the line pressure of the roll is 90daN / cm, and the temperature of the cooling roll is 160°C. After the polyimide film was peeled off manually, the LCP film was subjected to high-temperature heat treatment at a temperature of 220°C and a vehicle speed of 1.5m / min. After cooling, the LCP film is wound up.

Embodiment 3

[0035]A method for preparing a liquid crystal polymer film, the steps are: 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 0.5MPa, the cold drum temperature is 20°C, and then the film is formed by hot pressing with two rollers, and the temperature of the preheating roller is The temperature is 245°C, the temperature of the hot pressing roll is 295°C, both sides are protected by polyimide film (thickness 0.188mm), the line pressure of the roll is 60daN / cm, and the temperature of the cooling roll is 200°C. After the polyimide film was peeled off manually, 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 up.

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Abstract

The invention discloses a preparation method of a liquid crystal polymer thin film. The preparation method of the liquid crystal polymer thin film is characterized by comprising the steps of feeding dried liquid crystal polymer (LCP) resin into melt spinning equipment, carrying out melt spinning through compressed air, and obtaining an LCP fiber formed by melt blowing; naturally cooling, cooling and setting on a large cold drum, and forming an LCP non-woven fabric; protecting two sides of the LCP non-woven fabric through polyimide films, sequentially hot-pressing through a first group of preheat rollers and a second group of hot-press rollers, cooling through a cooling roller, and obtaining a three-layer composite thin film; stripping the polyimide film, and obtaining an LCP thin film; andafter heat treatment through a high-temperature furnace, cooling to obtain the liquid crystal polymer thin film. By adopting the preparation method of the liquid crystal polymer thin film provided bythe invention, equipment is simple and can carry out continuous production; and the prepared LCP thin film has the characteristics of high lateral strength, thin and adjustable thickness, good toughness and the like, and is suitable for the fields such as high-frequency high-speed copper-clad plates, solar cell back plates, wireless charging insulation sheets and the like.

Description

technical field [0001] The invention belongs to the preparation of organic polymer compounds, and relates to a preparation method of liquid crystal polymer film. As a high-function film, the liquid crystal polymer film prepared by the present invention has the characteristics of high mechanical strength, uniform longitudinal and transverse tensile strength, and good folding resistance, and can be widely used in high-frequency and high-speed copper-clad laminates, solar battery backplanes, and wireless charging. Insulation sheets and other fields. 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 liquids under certain physical conditions. There is also a polymer material in an anisotropic state of crystalline physical properties. Liquid crystal polymers have high str...

Claims

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Application Information

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Patent Type & Authority Applications(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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