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Preparation method of LCP film

A film and non-woven technology, applied in the field of LCP film preparation, can solve the problems of poor tensile strength and difficult film processing, and achieve the effects of increasing flexibility, good mechanical properties, and improving paper strength

Inactive Publication Date: 2021-03-16
JIANGSU ZANPOD NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation methods of liquid crystal polymer films mainly include extrusion blow molding and extrusion casting double-drawing method; because liquid crystal polymers have high orientation under the action of shear force, the films prepared by conventional methods are in the MD direction (Machine Direction) , the mechanical direction) has high mechanical properties, but the tensile strength in the TD direction (Transverse Direction, perpendicular to the mechanical direction) is very poor, that is, it is anisotropic, and the anisotropic liquid crystal film cannot meet the needs of flexible circuit boards. The use requirements, the film processing is extremely difficult

Method used

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  • Preparation method of LCP film
  • Preparation method of LCP film
  • Preparation method of LCP film

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preparation example Construction

[0021] The present invention is specifically described below in conjunction with accompanying drawing, as figure 1 Shown, a kind of preparation method of LCP thin film mainly comprises the following steps:

[0022] Step 1. The raw material LCP chopped fibers are disintegrated and dispersed by a hydraulic pulper. The disintegration time is 20 minutes, and the concentration after disintegration is 0.3%;

[0023] Step 2, performing fiber surface treatment after step 1 to obtain slurry;

[0024] Step 3, filter and form the slurry through a paper machine with a speed of 7-20m / min. During the forming process, in order to ensure the uniformity of the non-woven fabric, add a certain amount of dispersant and defoamer, and then Drying in a dryer at 80-120°C to obtain LCP non-woven fabrics;

[0025] Step 4, melting the LCP non-woven fabric into a film to obtain an LCP film.

[0026] In the above-mentioned step 4, the melting film is specifically: firstly melt the LCP non-woven fabric ...

Embodiment 1

[0030] Configure slurry A:

[0031] Step 1. The LCP chopped fibers with a diameter of 20 μm and a length of 6 mm are disintegrated and dispersed by a hydraulic pulper. The disintegration time is 20 minutes, and the concentration after disintegration is 0.3%;

[0032] Step 2: After step 1, use a conical slag remover and a pressure screen purifier to screen and purify to obtain qualified slurry for use.

[0033] Configure slurry B:

[0034] Step 1. The LCP chopped fibers with a diameter of 40 μm and a length of 3 mm are disintegrated and dispersed by a hydraulic pulper. The disintegration time is 20 minutes, and the concentration after disintegration is 0.3%;

[0035] Step 2: After step 1, carry out fiber surface treatment, use ultrasonic circulation treatment for 16 minutes, ultrasonic power 80KW, until the fiber is completely divided into filaments, and then use conical slag remover and pressure screen purifier to screen and purify to obtain qualified slurry B standby.

[0...

Embodiment 2

[0039] Step 1. The LCP chopped fibers with a diameter of 40 μm and a length of 3 mm are disintegrated and dispersed by a hydraulic pulper. The disintegration time is 20 minutes, and the concentration after disintegration is 0.3%;

[0040] Step 2: After step 1, carry out fiber surface treatment, adopt ultrasonic circulation treatment for 8 minutes, and control the ultrasonic power at 90KW until the fiber is completely divided into filaments, and then use conical slag remover and pressure screen purifier to screen and purify to obtain qualified pulp material.

[0041] Step 3, filter the slurry obtained in step 2 through a paper machine with a vehicle speed of 12m / min. In the forming process, in order to ensure the uniformity of the nonwoven fabric, add a certain amount of dispersant and defoamer, and then Drying in a dryer at 120°C to obtain LCP non-woven fabrics;

[0042] Step 4: Melt the LCP non-woven fabric with low-temperature hot-pressing part through the hot roll first, a...

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Abstract

The invention discloses a preparation method of an LCP film. The preparation method comprises the following steps: step 1, defibering and dispersing raw material LCP chopped fibers; step 2, carrying out fiber surface treatment to obtain slurry; step 3, filtering and forming the slurry, and drying to obtain an LCP non-woven fabric; and 4, melting the LCP non-woven fabric to form a film, thereby obtaining the LCP film. The method has the beneficial effects that filtering forming is conducted through a paper machine, the slurry amount and the vehicle speed are controlled, the LCP non-woven fabricwith the small longitudinal and transverse strength difference is achieved, in the forming process, a certain amount of dispersing agent and a certain amount of defoaming agent are added, and the uniformity of the non-woven fabric is guaranteed; through high-temperature secondary hot pressing treatment, the LCP non-woven fabric flows during melting to fill gaps in the non-woven fabric, a gaplessfilm is formed, the thickness requirement of the film is met by adjusting the pressure during hot pressing of a hot roller, and lubricating oil is smeared on the surface of the hot roller in order toprevent the roller from being stuck.

Description

technical field [0001] The invention relates to the technical field of polymer material processing, in particular to a preparation method of an LCP film. Background technique [0002] Liquid Crystal Polymer, or LCP for short, is a new type of polymer material that can exhibit both liquid fluidity and crystal physical property anisotropy under certain physical conditions. , Liquid crystal polymers have high mechanical properties, good dimensional stability, excellent heat resistance, chemical corrosion resistance, and low dielectric constant and dielectric loss at high frequencies, and are widely used. [0003] In recent years, with the rapid development of the electronics industry and the widespread application of 5G technology, electronic equipment tends to be miniaturized and highly functional. In high-tech fields such as communications, industrial automation, and aerospace, there are more and more requirements for packaging substrates in electronic equipment. The higher ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J3/12
CPCD21J3/12
Inventor 李敏吴萌邓艳梅
Owner JIANGSU ZANPOD NEW MATERIAL CO LTD
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