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Liquid crystal polyester film, preparation method, application and circuit board preparation method

A liquid crystal polyester and film technology, applied in circuit substrate materials, printed circuit manufacturing, printed circuits, etc., can solve problems such as high product anisotropy, poor product tear strength, and low product yield.

Pending Publication Date: 2021-07-30
JIANGMEN DENGZHONGTAI ENG PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to at least solve the technical problems of huge equipment investment, low product yield, poor product tear strength and high product anisotropy existing in the above-mentioned prior art

Method used

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  • Liquid crystal polyester film, preparation method, application and circuit board preparation method

Examples

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Effect test

manufacture example 1

[0076] Production Example 1: Preparation of Liquid Crystal Polyester Fiber

[0077] The preparation of liquid crystal polyester fiber comprises the following steps:

[0078] In a reactor equipped with a stainless steel C-type stirrer, torque gauge, nitrogen conduit, thermometer, pressure gauge and reflux condenser, 1027.5 g of 4-hydroxybenzoic acid (HBA), 470 g of 6-hydroxy-2-naphthalene Formic acid (HNA), the acetic anhydride of 1122g, the acetic acid of 200.0g, this reactor is purified by the mode of vacuumizing and dry nitrogen flushing, add the 1-methylimidazole of 0.3g, under the protection of nitrogen, at 150 rpm Stir at a speed of 1 minute, raise the temperature to 150°C over 60 minutes, and reflux at this temperature for 60 minutes. After adding 13.0g of phenol into the reactor, raise the temperature to 340°C within 120 minutes. During this period, by distillation Remove the by-product acetic acid, keep the temperature at 340°C for 30 minutes, gradually reduce the pre...

manufacture example 2

[0082] Manufacturing Example 2: Preparation of Liquid Crystal Polyester Fiber

[0083] The preparation of liquid crystal polyester fiber comprises the following steps:

[0084] In a reactor equipped with a stainless steel C-type stirrer, torque gauge, nitrogen conduit, thermometer, pressure gauge and reflux condenser, 994.5 g of p-hydroxybenzoic acid, 299.0 g of terephthalic acid, 99.7 g of isophthalic acid Diformic acid, 446.9g of 4,4'-dihydroxybiphenyl, 1347.6g of acetic anhydride, 200.0g of acetic acid, purify the reactor by vacuuming and flushing with dry nitrogen, add 0.18g of 1-methanol For imidazole, under nitrogen protection, stir at a speed of 75 rev / min, raise the temperature to 150°C over 60 minutes, and reflux at this temperature for 60 minutes, add 13.0g benzylamine and 1.84g calcium acetate to the reactor After that, the temperature was raised to 340°C within 20 minutes, during which the by-product acetic acid was removed by distillation, and after 30 minutes at...

Embodiment 1

[0088] Embodiment 1: the preparation of liquid crystal polyester film

[0089] A liquid crystal polyester film, by weight, comprises the following components:

[0090] Class A liquid crystal polyester fiber X1 (L A A =9μm) 30 parts,

[0091] Class B liquid crystal polyester fiber X1 (L B = 1 ~ 10mm, D B =9μm) 70 parts;

[0092] The A-type liquid crystal polyester fiber X1 and the B-type liquid crystal polyester fiber X1 are obtained by shearing the liquid crystal polyester fiber X1 prepared in Production Example 1.

[0093] A preparation method of a tear-resistant liquid crystal polyester film, comprising the following steps:

[0094] (1) Mix A-type liquid crystal polyester fiber X1, B-type liquid crystal polyester fiber X1 with water (the mass ratio of the total mass of A-type liquid-crystal polyester fiber X1 and B-type liquid-crystal polyester fiber X1 to water is 0.1: 100), prepared slurry C1;

[0095] (2) According to the papermaking process, the slurry C1 is copie...

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Abstract

The invention discloses a liquid crystal polyester film which is mainly prepared from A-class liquid crystal polyester fibers and B-class liquid crystal polyester fibers, and the length of the A-class liquid crystal polyester fibers is smaller than that of the B-class liquid crystal polyester fibers. The liquid crystal polyester film comprises the following components in parts by weight: 1-95 parts of A-type liquid crystal polyester fiber, 5-99 parts of B-type liquid crystal polyester fiber, and a functional filler. The invention also discloses a method for preparing the liquid crystal polyester film by adopting a papermaking process technology, application and a circuit board preparation method. The liquid crystal polyester film provided by the invention can simultaneously meet the characteristics of high tear strength and adjustable dielectric property, and has the advantages of high tear strength, excellent transverse and longitudinal tensile strength and small anisotropy, thereby being beneficial to the application of the liquid crystal polyester film. In addition, by adopting a traditional papermaking process, the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a liquid crystal polyester film, its preparation method, application and circuit board preparation method. Background technique [0002] Thermoplastic liquid crystal polymer (Liquid Crystal Polymer, LCP for short) refers to a wholly aromatic condensation polymer with relatively rigid and linear polymer chains. When these polymers are melted, they align to form liquid crystal phases. Liquid crystal polyester is a kind of thermoplastic liquid crystal polymer, and the widely used fully aromatic polyester is a kind of liquid crystal polyester. Fully aromatic polyester has high heat resistance, high chemical resistance, low water absorption and high dimensional stability, excellent dielectric properties, and maintains relatively stable characteristics in a wide frequency range and temperature range. The high Dk (dielectric constant) of the electronic components in the...

Claims

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Application Information

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IPC IPC(8): H05K1/03H05K3/00
CPCH05K1/0366H05K1/0373H05K3/0011
Inventor 梁永华金良文曾建平
Owner JIANGMEN DENGZHONGTAI ENG PLASTICS CO LTD
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