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Yarn guide bar for untying carbon fiber bundles and application thereof

A technology of carbon fiber bundles and yarn guide rods, which is applied in the field of carbon fiber reinforced thermoplastic resin composite materials, can solve the problems of high melt viscosity of thermoplastic resin, uneven distribution, and inability to fully impregnate thermoplastic resin, etc., to achieve broad application prospects and excellent tensile strength The effect of elongation

Inactive Publication Date: 2014-12-17
李芳丽 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the melt viscosity of thermoplastic resins is generally relatively high, so it is not conducive to the dispersion of carbon fibers and the impregnation of matrix resin during processing.
The uniform distribution of carbon fibers in the thermoplastic resin matrix and the complete impregnation of carbon fibers by the resin matrix cannot be fully realized by the traditional fiber-reinforced composite material processing method
The existing literature reports several preparation methods of carbon fiber reinforced thermoplastic resin composites, such as short fiber filling method, fabric coating method, film melting method, etc. Although they all improve the impact toughness and elongation of the product to varying degrees, However, there is still an uneven distribution between the carbon fiber and the thermoplastic resin, and it is impossible to fully impregnate the carbon fiber with the thermoplastic resin.

Method used

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  • Yarn guide bar for untying carbon fiber bundles and application thereof
  • Yarn guide bar for untying carbon fiber bundles and application thereof
  • Yarn guide bar for untying carbon fiber bundles and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 It is a schematic diagram of the structure of the yarn guide rod and the configuration of the continuous carbon fiber bundles of the present invention, the shape of the yarn guide rod is semicircular arc, and the angle between the fiber bundle 1 and the yarn guide rod is 30°-60°. The yarn guide rods are composed of dispersing rods 9 and clustering rods 10, which are arranged in a staggered manner. According to specific conditions, they can be arranged at intervals along the horizontal direction, and can also be arranged up and down along the vertical direction. The radius of the outer circle of the dispersing rod 9 is R1, and the radius of the inner circle of the clustering rod 10 is R2, wherein R1>R2, R1 / R2=1.5-2.0.

[0029] figure 2 It is a schematic diagram of several cross-sectional structural forms of the yarn guide rod of the present invention, which can be arc-shaped, trapezoidal, V-shaped, etc., so that the fiber bundles can achieve multi-point contac...

Embodiment 2～7

[0032] according to image 3 In the preparation device shown, the continuous carbon fiber bundle used is the T300 product of Toray Corporation of Japan (the average fiber diameter is 7 μm, the number of fibers in the tow is 12,000, and the tensile strength is 3530Mpa). The thermoplastic resins are PA66, PA6, PP, PC and ABS, according to the process conditions set in Table 1, respectively prepared carbon fiber reinforced thermoplastic resin composite pellets, the mechanical properties of various composite pellets obtained are shown in Table 2, and Table 3 shows the thermoplastic resin without adding fiber bundles. Resin mechanical properties data.

[0033] Table 1

[0034]

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

Yarn guide rod diameter (mm)

25

25

25

25

25

25

Dispersing rod arc radius R1(mm)

75

80

75

75

75

75

Cluster rod arc radius R2(mm)

50

40

...

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Abstract

The invention relates to a yarn guide bar for untying carbon fiber bundles and an applciation. The yarn guide bar takes the shape of a semicircular arc, and consists of not less than four untying bars and bundling bars in total, wherein the untying bars and the bundling bars are arranged at intervals along the horizontal direction or arranged with one above another along the vertical direction; the exradius of the untying bars is R1, the inradius of the bundling bars is R2, R1 is greater than R2, and the ratio of R1 to R2 is equal to 1.5-2.0; the included angle between a carbon fiber bundle and the yarn guide bar is 30-60 degrees; the contact surface of the yarn guide bar is cambered, trapezoidal or V-shaped. Through the yarn guide bar with a specific design structure for untying carbon fiber bundles, the problem of impregnation of carbon fiber bundles and thermoplastic resin is solved excellently, so that a high-performance carbon fiber reinforced thermoplastic resin-based composite material is successfully prepared, and the material has broad application prospect in the fields of aviation, automobiles, communication, and mechano-electronic appliances due to excellent tensile strength, bending strength and flexural modulus.

Description

technical field [0001] The invention relates to the technical field of carbon fiber composite materials, in particular to a yarn guide rod for dispersing carbon fiber bundles and its application, in particular, the yarn guide rod is used to prepare carbon fiber reinforced thermoplastic resin composite materials with high fiber content and high performance. Background technique [0002] Compared with thermosetting resin-based carbon fiber composite materials, thermoplastic resin-based carbon fiber composite materials have high impact toughness, short molding cycle, no special requirements for storage of prepreg materials, easy recycling and reprocessing of products, and can realize rapid, pollution-free, automatic and continuous production. production advantages. Therefore, thermoplastic resin-based carbon fiber composites have largely solved the shortcomings of thermosetting resin-based carbon fiber composites, such as poor fracture toughness, poor environmental adaptability...

Claims

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Application Information

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IPC IPC(8): B29C70/54
CPCB29B15/14
Inventor 李芳丽张万虎
Owner 李芳丽