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Fiber-reinforced thermoplastic resin substrate and molded article using same

A thermoplastic resin and fiber-reinforced technology, applied in the field of fiber-reinforced thermoplastic resin substrates and molded products using it, can solve the problems of inability to properly evaluate the density of reinforcing fibers, uneven dispersion of reinforcing fibers, etc.

Active Publication Date: 2021-08-20
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of such a method, in reinforcing fibers such as figure 1 In the case of the distribution as shown, the degree of density of the reinforcing fibers in each region cannot be properly evaluated, and there is a possibility that the reinforcing fibers are actually dispersed unevenly

Method used

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  • Fiber-reinforced thermoplastic resin substrate and molded article using same
  • Fiber-reinforced thermoplastic resin substrate and molded article using same
  • Fiber-reinforced thermoplastic resin substrate and molded article using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] Carbon fibers (referred to as CF in Table 1) were used as reinforcing fibers, 16 bobbins wound with carbon fiber bundles were prepared, and the carbon fiber bundles were fed out from each bobbin continuously through a yarn guide. In the impregnation mold, the matrix resin ("Amilan" (registered trademark) manufactured by Toray Co., Ltd.: polyamide 6 [described as PA6 in Table 1]) supplied quantitatively from the filled feeder is impregnated into the continuously fed in carbon fiber bundles. The carbon fiber impregnated with polyamide 6 resin as a matrix resin is continuously pulled from the nozzle of the impregnation die at a drawing speed of 1 m / min by using a pulling roll with a weak force such that the dispersion of the reinforcing fiber bundles does not deteriorate. pull. The time for the carbon fiber bundle to pass through the nozzle was 4.0 seconds. The drawn carbon fiber bundles pass through cooling rolls, the polyamide 6 resin is cooled and solidified, and woun...

Embodiment 2～7

[0129] In addition to changing the product thickness, volume content and matrix resin (“Amilan” (registered trademark) manufactured by Toray Co., Ltd.: polyamide 6 or polyamide 6 / 66 [described as PA6 and PA6 / 66 in Table 1]) to Except for the conditions shown in Table 1, it carried out similarly to Example 1, and obtained the fiber-reinforced polyamide resin base material. The obtained fiber-reinforced polyamide resin base material was subjected to the above-mentioned evaluation. Table 1 shows the evaluation results.

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Abstract

A fiber-reinforced thermoplastic resin substrate and a molded article using the same, in which continuous reinforcing fibers are impregnated with a thermoplastic resin, and the fiber volume content is in the range of 40 to 65% by volume, and a molded article using the same, and The dispersion parameter D of the fiber obtained by the following method was 90% or more. (i) A cross section of the fiber-reinforced thermoplastic resin base material perpendicular to the orientation direction of the reinforcing fibers is divided into a plurality of regions, and one of the regions is photographed. (ii) Divide the captured image of the above region into a plurality of square units having a length t of one side specified by the formula (1). (iii) Calculate the dispersion parameter d defined by the formula (2). (iv) The steps (i) to (iii) are repeated for different regions, and the average value of the dispersion parameter d of multiple regions obtained from the above cross-section is taken as the dispersion parameter D. (1) 1.5a≤t≤2.5a (a: fiber diameter, t: length of one side of the unit), (2) dispersion parameter d = number of units containing reinforcing fibers in the area / units in the area Total number × 100. A fiber-reinforced thermoplastic resin in which reinforcing fibers are dispersed with high uniformity and which stably exhibits excellent mechanical properties with little variation can be obtained.

Description

technical field [0001] The present invention relates to a fiber-reinforced thermoplastic resin substrate and a molded article using the same. Background technique [0002] Fiber-reinforced thermoplastic resin base material impregnated with thermoplastic resin in continuous reinforcing fibers has excellent specific strength and specific stiffness, high weight reduction effect, high heat resistance, and high chemical resistance, so it can be preferably used in aircrafts and automobiles Various applications such as conveying equipment, sporting goods, electrical and electronic components, etc. In recent years, due to the increasing demand for lightweight, the replacement of metal parts to resin parts, the miniaturization and modularization of parts are progressing, centering on aircraft and automobile applications. A material with superior mechanical properties. [0003] As a composite material for structural materials excellent in formability and mechanical properties, for e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/04
CPCC08J5/042C08J2377/04C08J5/243C08L77/02C08L77/06B32B15/08B32B27/08B32B27/34C08J2377/06C08J2377/02B29C70/205B29C70/52B29K2077/00B29K2307/04
Inventor 越政之大目裕千金野荣太石田翔马
Owner TORAY IND INC