Composite material containing liquid crystal polymer as well as processing and forming method and application of composite material

A liquid crystal polymer, processing and molding technology, applied in the direction of metal pattern materials, chemical instruments and methods, synthetic resin layered products, etc., can solve the problems of large waste water discharge and adverse effects on performance, so as to eliminate the generation of waste water and avoid various Non-uniform mechanical properties and high practicability

Pending Publication Date: 2022-04-01
惠生(中国)投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discharge of wastewater involved in this technology is relatively large, and the additives such as flocculants introduced in the process will inevitably have a certain adverse effect on the performance of the product

Method used

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  • Composite material containing liquid crystal polymer as well as processing and forming method and application of composite material
  • Composite material containing liquid crystal polymer as well as processing and forming method and application of composite material
  • Composite material containing liquid crystal polymer as well as processing and forming method and application of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment discloses a method for processing and forming an aramid fiber-LCP sheet. On the mirror polished stainless steel plate, according to 0.05g / cm 2 Spread a layer of Vectra A950 LCP resin powder (self-made from pellets) with a density of 0.1 g / cm 2 Spread a layer of LCP powder with the same density as the first layer, cover it with a layer of aramid cloth in the same direction of warp and weft as the first layer, and then cover it with 0.05g / cm 2 Spread a layer of LCP powder at a density of . Finally, another layer of smooth stainless steel plate is covered on the top, and the relative position of the two plates is fixed with a clamp to prevent slippage.

[0055] Place the above-mentioned sandwich structure in an oven with a temperature control device, and adjust the pressure by increasing or decreasing the weight pressed above.

[0056] In the absence of external pressure, the sample was kept at 240°C for 2h and 250°C for 1h; then 0.2kg / cm 2 The pressure...

Embodiment 2

[0059] This embodiment discloses a processing and molding method of aramid fiber-liquid crystal polymer composite parts.

[0060] In the mold, aramid cloth (the aramid cloth is the same as in Example 1) and LCP powder (Vectra A950 resin is used in this embodiment) are laminated to form a sandwich structure. According to the total volume of the part, the density of aramid is 1.44g / cm 3 and the density of LCP resin is 1.4g / cm 3 Carry out the calculation of the filling quantity, which is 101% of the total volume of the part.

[0061] Place the above-mentioned sandwich structure in an oven with a temperature control device, and adjust the pressure by increasing or decreasing the weight pressed above.

[0062] In the absence of external pressure, the sample was kept at 240°C for 2h and 250°C for 1h; then 0.2kg / cm 2 The pressure is raised to 280°C with a temperature gradient of 1°C / min; then increase the load to 0.5kg / cm 2 , the temperature was raised to 310°C at a rate of 5°C / m...

Embodiment 3

[0066] This embodiment discloses a method for processing and forming an aramid fiber-liquid crystal polymer composite film. The aramid fiber used is Teijin Twaron long fiber with a diameter of about 0.015mm (nominal denier 1.9-2.5 denier). The liquid crystal polymer fiber used is a self-made fiber by melt spinning using Vectra A 950 resin, and its diameter is about 0.2mm measured under a microscope at multiple points.

[0067] The yarn formed by blending the above two fibers is blended into a cloth by a weaving method. Two layers of this fabric are superimposed and clamped top and bottom with polished stainless steel plates.

[0068] Place the above-mentioned sandwich structure in an oven with a temperature control device, and adjust the pressure by increasing or decreasing the weight pressed above.

[0069] In the absence of external pressure, the sample was kept at 240°C for 2h and 250°C for 1h; then 0.2kg / cm 2 The pressure is raised to 280°C with a temperature gradient of ...

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Abstract

The invention provides a composite material containing a liquid crystal polymer and a processing and forming method and application of the composite material. The composite material takes a fabric containing thermosetting fibers as a reinforcing material and takes the liquid crystal polymer as a binding phase; thermosetting fibers and liquid crystal polymer fibers or fabrics formed by the thermosetting fibers and liquid crystal polymers are used as raw materials, and are compounded and molded through hot pressing processing. Compared with a film material purely prepared from a liquid crystal polymer, the processing and forming method of the composite material has the advantages of easiness in forming, low anisotropy, lower dielectric constant and good mechanical strength, and is very suitable for being used as a novel printed circuit board base material.

Description

technical field [0001] The invention relates to the field of additive processing of polymer materials, in particular to a composite material containing liquid crystal polymers and a processing method and application thereof. Background technique [0002] Liquid crystal polymer (LCP for short) is an important special engineering plastic, especially in the electronics industry. Its main structure is an aromatic copolyester formed by polycondensation of aromatic hydroxycarboxylic acid, diphenol and aromatic dicarboxylic acid. Its general chemical structure is as follows: [0003] [0004] In the formula, AR1, AR2, and AR3 can be one or more of the following structures: [0005] [0006] In addition, part of the ester bonds in the formula can be replaced by amide bonds to enhance the interchain force. [0007] Due to the heat-resistant aromatic ring structure in the liquid crystal polymer molecule, it not only has excellent heat resistance, dielectric properties, mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/12B32B27/34B32B37/06B32B37/10B32B37/24B32B37/00B32B37/04H05K1/09H05K3/10
Inventor 吴煜高敬民金纪阳
Owner 惠生(中国)投资有限公司
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