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Fiber-reinforced resin composition and molded body thereof

A composition and molding technology, which is applied in the field of fiber-reinforced resin compositions and moldings obtained therefrom, and can solve problems such as increased density, increased ash content, and increased weight

Inactive Publication Date: 2007-03-28
PRIME POLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A method of adding plate-like inorganic fillers such as mica (Patent Documents 2 and 3) is also disclosed. However, when a large amount of inorganic fillers other than carbon fibers are added, the density increases (heaviness) and the ash content increases. Problems that impair the characteristics of carbon fiber-based materials, such as

Method used

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  • Fiber-reinforced resin composition and molded body thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] After mixing (dry mixing) each material shown in the following Table 1, it was charged into a twin-screw extruder (manufactured by Toshiba Machine, TEM-35B, cylinder temperature: 200° C., screw rotation speed: 300 rpm) from a top feeder , and melt-kneaded to obtain a fiber-reinforced resin composition.

Embodiment 2～4、 comparative example 1～3

[0071] A fiber-reinforced resin composition was prepared in the same manner as in Example 1 except that the component composition was changed to that shown in Table 1 below.

[0072]

[0073]The fiber-reinforced resin compositions prepared in Examples 1 to 4 and Comparative Examples 1 to 3 were molded according to the following method, and various physical properties of the obtained molded products (test pieces) were determined according to the following method. The obtained results are shown in Table 1 below.

[0074] (1) Curvature (%):

[0075] Through injection molding, it is formed into a circular plate with a diameter of 150mm and a thickness of 2.5mm. After adjusting the state at 23°C for 48 hours, as shown in Figure 1, obtain d 1 and d 2 , the curvature is calculated from the following formula.

[0076] Curvature (%) = {(d 1 +d 2 ) / (2×140)}×100

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PUM

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Abstract

Disclosed is a fiber-reinforced polyolefin resin composition containing (A) 1-20 mass% of carbon fibers having a fiber diameter of 3-20 mum, (B) 3-50 mass% of black lead (graphite) having an average particle diameter of 1-100 mum, and (C) 25-95 mass% of a polyolefin resin, wherein the mass ratio of the black lead (graphite) (B) (Wg) to the carbon fibers (A) (Wcf), namely mass ratio (Wg / Wcf), is 1-10.

Description

technical field [0001] The present invention relates to a fiber-reinforced resin composition and a molded body obtained therefrom. More specifically, the present invention relates to a carbon fiber-containing fiber-reinforced resin composition that reduces bending deformation of a molded article, and a molded article containing the same. Background technique [0002] It is well known that fiber-reinforced polyolefin-based resins exhibit anisotropy in shrinkage rate due to fiber orientation when they are molded, resulting in bending or deformation. Therefore, their application to various applications is limited. When carbon fiber is used to reinforce polyolefin resin, compared with inorganic fillers other than carbon fiber, although the rigidity, strength, and heat resistance can be improved with a small amount of addition, it is easy to bend or deform, so This necessitates a method of reducing warpage. [0003] Adding an elastic body (Patent Document 1) is known as a metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08K3/04C08K7/06
CPCC08K7/06C08L51/06C08L2205/16C08K3/04C08L23/10
Inventor 矢野公规
Owner PRIME POLYMER CO LTD
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