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Structural body

A structure and volume technology, applied in the field of structures, can solve the problems of poor density and poor mechanical properties, and achieve the effects of excellent rigidity and light weight, light weight and mechanical properties

Active Publication Date: 2018-08-21
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like core materials, structures with voids and poor densities are inferior to other structural members in terms of mechanical properties, so there are limitations when used as a structure alone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] Reinforcing fiber mat 3 as a reinforcing fiber mat and PP resin as a resin sheet, according to [resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / reinforced fiber Mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet] to produce a laminate. Next, a structure was obtained by passing through the following steps (I) to (V). In the obtained structure, voids formed by making the reinforcing fibers a columnar support were confirmed from cross-sectional observation. Table 3 shows the properties of the obtained structure.

[0144](I) The laminate was placed in the cavity of a pressure molding mold preheated to 230° C., and the mold was closed.

[0145] (II) Next, after maintaining for 120 seconds, a pressure of 3 MPa was applied and maintained for further 60 seconds.

[0146] (III) After the step (II), the cavity of the mold was opene...

Embodiment 2

[0150] Reinforcing fiber mat 3 as a reinforcing fiber mat and PP resin as a resin sheet according to [resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / reinforced fiber Mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet] was arranged in the order to produce a laminate, and a structure was obtained in the same manner as in Example 1. Table 3 shows the properties of the obtained structure.

Embodiment 3

[0152] The reinforcing fiber mat 3 as the reinforcing fiber mat and the PP resin as the resin sheet are in the order of [resin sheet / reinforced fiber mat / resin sheet / reinforced fiber mat / reinforced fiber mat / resin sheet / reinforced fiber mat / resin sheet] Arrangement was made to produce a laminate, except that the thickness of the metal spacer in step (III) was changed from 3.4 mm to 5.6 mm, and a structure was obtained in the same manner as in Example 1. Table 3 shows the properties of the obtained structure.

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Abstract

A structural body according to the present invention is a structural body comprising a resin, a reinforced fiber, and a gap, wherein a volume content of the resin is in a range of at least 2.5% by volume and at most 85% by volume, wherein a volume content of the reinforced fiber is in a range of at least 0.5% by volume and at most 55% by volume, wherein the gap is included in the structural body at a proportion in a range of at least 10% by volume and at most 99% by volume, wherein, when a length of the reinforced fiber is set as Lf and when an orientation angle of the reinforced fiber in a cross-sectional direction of the structural body is set as [Theta]f, a thickness St of the structural body satisfies the conditional expression: St>=Lf2-(1-cos([Theta]f)), wherein, when setting a bending modulus of the structural body as Ec, and when the specific gravity of the structural body is set as [Rho], a specific bending modulus of the structural body expressed as Ec1 / 3-[Rho]-1 is in a rangeof at least 3 and at most 20 and the bending modulus Ec of the structural body is at least 3GPa.

Description

technical field [0001] The present invention relates to structures comprising resin, reinforcing fibers and voids. Background technique [0002] In recent years, with regard to industrial products such as automobiles, aircraft, and sporting goods, market demands for increased rigidity and light weight have been increasing year by year. In response to such demands, fiber-reinforced resins excellent in rigidity and lightness are widely used in various industrial applications. Specifically, in order to satisfy lightness, the use of a lightweight core material has been extensively studied (see Patent Documents 1 and 2). However, the rigidity of the core material as a single material is very poor. Therefore, in the case of using a core material, it is necessary to design a product in which a highly rigid skin layer or the like is arranged on the outer periphery of the core material. However, the mass of the product thus designed must be increased, or the thickness must be incr...

Claims

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Application Information

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IPC IPC(8): C08J5/04
CPCC08J5/04B29C43/52C08J2323/12C08J2363/00C08J2369/00C08J2377/00C08J2381/04B29C70/502C08J5/042B29K2023/12B29K2077/00B29K2081/04B29K2069/00B29K2063/00B29K2105/0854B29C43/02B29C43/14B29K2307/04C08J9/0085C08K7/06C08L101/00
Inventor 武部佳树本间雅登
Owner TORAY IND INC