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Fiber-reinforced thermoplastic resin molded article, fiber-reinforced thermoplastic resin molding material, and method for producing fiber-reinforced thermoplastic resin molding material

A thermoplastic resin and fiber-reinforced technology, which is applied in the manufacture of fiber-reinforced thermoplastic resin moldings, fiber-reinforced thermoplastic resin molding materials and fiber-reinforced thermoplastic resin molding materials, can solve the problems of insufficient impact strength of mechanical properties and low-temperature impact strength, etc. , to achieve the effect of excellent low temperature impact strength and high reinforcement effect

Active Publication Date: 2017-05-31
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molded articles obtained using the technique have problems of insufficient mechanical properties, especially impact strength and low-temperature impact strength

Method used

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  • Fiber-reinforced thermoplastic resin molded article, fiber-reinforced thermoplastic resin molding material, and method for producing fiber-reinforced thermoplastic resin molding material
  • Fiber-reinforced thermoplastic resin molded article, fiber-reinforced thermoplastic resin molding material, and method for producing fiber-reinforced thermoplastic resin molding material
  • Fiber-reinforced thermoplastic resin molded article, fiber-reinforced thermoplastic resin molding material, and method for producing fiber-reinforced thermoplastic resin molding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0157] Examples are shown below to explain the present invention more specifically, but the present invention is not limited to the description of these examples. First, the evaluation methods of various characteristics used in this example will be described.

[0158] (1) Measurement of melt viscosity

[0159] For the thermoplastic resins (C), (G), compounds (D) and (H) used in the respective examples and comparative examples, the melt viscosity at 200°C was measured with a viscoelasticity meter at 0.5 Hz using a 40 mm parallel plate .

[0160] Furthermore, after leaving the compounds (D) and (H) to stand in a hot air dryer at 200°C for 2 hours, the melt viscosity at 200°C was measured in the same manner. Furthermore, after leaving the compounds (D) and (H) to stand in a hot air dryer at 200°C for 2 hours, the melt viscosity at 200°C was measured in the same manner.

[0161] (2) Measurement of average fiber length and distance between average fiber ends

[0162] On a hot stage set at...

reference example 1

[0188] (Reference example 1) Production of carbon fiber (A)

[0189] Spinning, sintering, and surface oxidation treatment are performed from a copolymer with polyacrylonitrile as the main component, and the total number of filaments is 24,000, the single fiber diameter is 7μm, the mass per unit length is 1.6g / m, and the specific gravity is 1.8 g / cm 3 , Continuous carbon fiber with surface oxygen concentration ratio [O / C] of 0.2. The strand tensile strength of the continuous carbon fiber is 4,880 MPa, and the strand tensile elastic modulus is 225 GPa. Next, a sizing agent mother liquid was prepared (polyglycerol polyglycidyl ether as a polyfunctional compound was dissolved in water in an amount of 2% by weight), a sizing agent was applied to the carbon fibers by an immersion method, and dried at 230°C. The sizing agent adhesion amount of the carbon fiber thus obtained was 1.0% by weight.

reference example 2

[0190] (Reference example 2) Organic fiber (B)

[0191] Polyphenylene sulfide fiber ("TORCON" (registered trademark) 400T-100-190 manufactured by Toray Co., Ltd., monofilament fineness of 4.0 dtex, and melting point of 285°C) was used. The elongation at break of the fiber was measured by the method described in (3) above, and the result was 30%.

[0192] Polyester fiber ("TETORON" (registered trademark) 2200T-480-705M manufactured by Toray Co., Ltd., monofilament fineness of 4.6 dtex, and melting point of 260°C) was used. The elongation at break was measured by the method described in (3) above in the same manner as the above-mentioned polyphenylene sulfide fiber. As a result, it was 15%.

[0193] Polytetrafluoroethylene fiber ("TOYOFLON" (registered trademark) 440T-60F-S290-M190 manufactured by Toray Co., Ltd., single filament fineness of 7.3 dtex, and melting point of 327°C) was used. The elongation at break was measured by the method described in (3) above in the same manner as ...

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Abstract

A fiber-reinforced thermoplastic resin molded article comprising 5 to 40 parts by weight of carbon fibers relative to 100 parts by weight of the total amount of carbon fibers (A), organic fibers (B) and thermoplastic resin (C) (A), 1-40 parts by weight of organic fiber (B), 20-94 parts by weight of thermoplastic resin (C), the average fiber length (LA) of the carbon fiber (A) in the fiber-reinforced thermoplastic resin molded article is: 0.3 to 1.5 mm, and the average fiber end distance (DA) and average fiber length (LA) of the carbon fiber (A) from the starting point to the end point satisfy the following formula [1], the fiber reinforced thermoplastic resin molded article The average fiber length (LB) of the organic fiber (B) is 1.5 to 4 mm, and the average fiber end distance (DB) and the average fiber length (LB) of the organic fiber (B) from the starting point to the end point satisfy the following formula [ 2]. The present invention provides a fiber-reinforced thermoplastic resin molded article excellent in mechanical properties, particularly impact strength and low-temperature impact strength. 0.9×LA≤DA≤LA[1] 0.1×LB≤DB≤0.9×LB[2].

Description

Technical field [0001] The present invention relates to a method for manufacturing a fiber-reinforced thermoplastic resin molded product, a fiber-reinforced thermoplastic resin molded material, and a fiber-reinforced thermoplastic resin molded material containing carbon fibers and organic fibers. Background technique [0002] Molded products containing reinforcing fibers and thermoplastic resins are widely used for sporting goods, aerospace, and general industrial applications due to their light weight and excellent mechanical properties. The above-mentioned reinforcing fibers can use metal fibers such as aluminum fibers and stainless steel fibers, inorganic fibers such as silicon carbide fibers and carbon fibers, and organic fibers such as aramid fibers and polyparaphenylene benzodioxazole (PBO) fibers. From the viewpoint of the balance between strength, specific rigidity, and lightness, carbon fibers are preferable, and among them, polyacrylonitrile (PAN)-based carbon fibers ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/04
CPCC08J5/047C08L23/12C08L69/00C08J2323/12C08J2369/00C08L2205/16C08L81/02C08K7/06C08K3/04C08L67/02C08L27/18C08J2423/26C08K7/02C08L51/06C08L2205/03B29B7/48B29B7/726B29B7/88B29B7/90B29B9/06B29B9/14
Inventor 平田慎三辻祐树西村透
Owner TORAY IND INC