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Preparation method of basalt fiber fabric reinforced nylon 6 prepreg composite material

A fiber fabric and composite material technology, which is applied in the field of preparation of basalt fiber fabric reinforced nylon 6 prepreg composite material, can solve the problems affecting the performance of composite materials, low molecular weight monomers cannot be removed, and monofilament level impregnation cannot be guaranteed. Achieve excellent mechanical properties, low residual content, and dense composite materials

Active Publication Date: 2019-02-26
JIANGSU HARMONY & MIGHTY SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fiber braids are different from the fiber bundles in the above patents, and the fiber monofilaments are more compact. Even if monomer impregnation is used, there is no guarantee that monofilament level impregnation can be achieved.
In order to enable the lactam monomer to fully impregnate the fiber fabric, the patent documents with publication numbers CN101152747A, CN103042702A, CN104910374A and CN107033589A disclose that under pressure or vacuum assistance, fiber fabric reinforced nylon composite materials were respectively prepared by resin transfer molding process, However, the monomer conversion rate of caprolactam anionic polymerization cannot reach 100%. After in-situ impregnation, in-situ polymerization, and in-situ compounding of caprolactam and fiber fabrics, the residual low molecular weight monomers in the prepared composite materials cannot be removed, which affects the final compounding. Material properties

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of basalt fiber fabric reinforced nylon 6 prepreg composite material
  • Preparation method of basalt fiber fabric reinforced nylon 6 prepreg composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of basalt fiber fabric reinforced nylon 6 composite material prepreg is as follows:

[0019] (1) Weigh 600 parts by weight of caprolactam and heat it to 80°C to melt, then remove a small amount of water through vacuum distillation, then divide the molten liquid into two parts of equal weight, and add them to liquid feeding devices A and B at a constant temperature of 80°C middle. Add 0.024 parts by weight of sodium caprolactam to liquid feeding device A and mix thoroughly; add 0.024 parts by weight of toluene-2,4-diisocyanate to liquid feeding device B and mix thoroughly; The mixture is added at the same rate figure 1 Mix evenly in the twin-screw extruder 5 with medium length-to-diameter ratio of 44, extrusion temperature of 80°C, and main engine speed of 500r / min to form a reactive caprolactam melt, and extrude into the dipping tank 6 with a constant temperature of 80°C for basalt fiber Fiber cloth impregnation;

[0020] (2) Pull 400 parts by...

Embodiment 2

[0023] The preparation method of basalt fiber fabric reinforced nylon 6 composite material prepreg is as follows:

[0024](1) Weigh 200 parts by weight of caprolactam and heat it to 100°C to melt, remove a small amount of water through vacuum distillation, then divide the molten liquid into two parts of equal weight, and add them to liquid feeding devices A and B at a constant temperature of 100°C middle. Add 0.2 parts by weight of sodium caprolactam to liquid feeding device A and mix thoroughly; add 0.2 parts by weight of toluene-2,4-diisocyanate to liquid feeding device B and mix thoroughly; The mixture is added at the same rate figure 1 Mix evenly in the twin-screw extruder 5 with medium length-to-diameter ratio of 44, extrusion temperature of 100°C, and main engine speed of 800r / min to form a reactive caprolactam melt, and extrude to the dipping tank 6 with a constant temperature of 100°C for basalt fiber Fiber cloth impregnation;

[0025] (2) Pull 800 parts by weight ...

Embodiment 3

[0028] The preparation method of basalt fiber fabric reinforced nylon 6 composite material prepreg is as follows:

[0029] (1) Weigh 400 parts by weight of caprolactam and heat it to 90°C to melt, then remove a small amount of water through vacuum distillation, then divide the molten liquid into two parts of equal weight, and add them to liquid feeding devices A and B at a constant temperature of 90°C middle. Add 2.008 parts by weight of sodium caprolactam to liquid feeding device A, and fully mix; Add 2.008 parts by weight of toluene-2,4-diisocyanate to liquid feeding device B, and fully mix; Then, liquid feeding device A and liquid feeding The mixture in Apparatus B is added at the same rate figure 1 Mix evenly in the twin-screw extruder 5 with medium length-to-diameter ratio of 44, extrusion temperature of 90°C, and main engine speed of 650r / min to form a reactive caprolactam melt, and extrude to the dipping tank 6 with a constant temperature of 90°C for basalt fiber Fib...

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Abstract

The invention provides a preparation method of a basalt fiber fabric reinforced nylon 6 prepreg composite material. The preparation method of the basalt fiber fabric reinforced nylon 6 prepreg composite material comprises the following steps: 1) dividing a caprolactam melt into two portions with equal weights, and separately storing the two portions in a liquid charging device A and a liquid charging device B; and adding a caprolactam anionic polymerization catalyst in the liquid feeding device A and mixing uniformly, adding a caprolactam anionic polymerization co-catalyst in the liquid feeding device B and mixing uniformly, adding the mixture in the liquid charging device A and the mixture in the liquid charging device B in a double-screw extruder, uniformly mixing the mixtures by the double-screw extruder and extruding mixed melt into an impregnating tank; 2) dragging a basalt fiber fabric into a corona charging device, charging and then feeding the basalt fiber fabric into the impregnating tank; and 3) heating the basalt fiber fabric treated in step 2), triggering caprolactam anionic polymerization reaction, rolling and cooling. The basalt fiber fabric can be fully impregnated by the caprolactam melt so as to prepare the high-performance basalt fiber fabric reinforced nylon 6 prepreg composite material.

Description

technical field [0001] The invention relates to a composite material, in particular to a method for preparing a basalt fiber fabric reinforced nylon 6 prepreg composite material. Background technique [0002] Fiber fabric reinforced thermoplastic composites have better structural properties, impact resistance and corrosion resistance than thermosetting resin-based composites, especially at high temperature and high humidity, and can still maintain good mechanical properties. Therefore, in recent years, more and more attention from all countries. However, thermoplastic resins have high melt viscosity, difficulty in melt flow, difficulty in fully impregnating fabrics with resin, and complicated impregnation process, which limit the performance and application range of composite materials. Chinese patent applications with application numbers 201210085175.8, 201210315906.3, 201310019610 and 201611253189.0 respectively disclose the technology of preparing thermoplastic resin-bas...

Claims

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Application Information

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IPC IPC(8): C08G69/14C08G69/16C08K9/00C08K7/10
CPCC08G69/14C08G69/16C08K7/10C08K9/00
Inventor 刘晓栋闫东广张远裴成度杜娇
Owner JIANGSU HARMONY & MIGHTY SCI & TECH DEV CO LTD
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