JPH0465234A - Thermoplastic resin frp - Google Patents

Abstract

PURPOSE:To prevent delamination, to increase flow quantity at the time of molding and to improve surface smoothness by laminating a resin rich layer low in fiber content and composed of a resin of the same kind as a thermoplastic resin FRP material to the thermoplastic resin FRP material to form a laminated sheet. CONSTITUTION:A resin rich layer 2 made zero or lowered in the content of a fiber la and composed of the same resin as thermoplastic resin FRP material is sandwiched between two thermoplastic resin FRP layers to be molded to laminate the FRP materials. As the molding material of the resin rich layer 2, a resin film, a resin fabric, a pellet, a random mat or a chopped fiber are used. In the thermoplastic resin FRP formed by laminating the thermoplastic resin FRP material l and the resin rich layer 2, the thermoplastic resin FRP material l and the resin rich layer 2 are the same kind. Therefore, an article having no clear boundary between both layers can be formed. It is unnecessary to consider the elongation difference or adhesiveness between both layers and interlaminar heat stress can be relaxed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention mainly relates to thermoplastic resin FRP used as aircraft structural members such as aircraft jet engine parts.

[Prior Art] For example, composite materials used as molding materials for parts of aircraft jet engines are required to be resistant to interlayer cracks even when struck by foreign objects, but conventional materials of this type As shown in Fig. 3, the interleaf material C is applied in a layer on one side of the fiber resin matrix b, and the two are joined by the internal adhesive properties of the fiber resin matrix b to form an interleaf fiber resin composite. There is also one using material a (Japanese Patent Application Laid-Open No. 60-63229).

[Problem to be solved by the invention] However, in the conventional fiber-resin composite material a, different types of interleaf materials C are layered on the fiber-resin matrix b and the two are bonded together. , there is a clear boundary between the fiber resin matrix b and the interleaf material C. When a composite material was manufactured by laminating different types of materials d and e, an experiment was conducted in which an impact was applied from the direction of the arrow f in Figure 4.
It has been confirmed that this has occurred, and even with the conventional composite material mentioned above, when an impact is applied, there is a clear boundary between the fiber resin matrix B and the interleaf material C, and there is a risk of cracking between the layers. If a crack occurs at the boundary between the two, there is a risk of separation between the layers. Furthermore, if there is a sharp boundary between the two materials as described above, it is necessary to consider the elongation and adhesion between the two materials.

Therefore, the present invention aims to prevent the boundary between the two materials from clearly appearing between the layers when laminated, so that cracks do not occur in the direction between the layers even when subjected to impact, and to prevent the occurrence of cracks in the direction between the layers. The aim is to obtain something that does not require consideration of elongation or adhesion between materials.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides thermoplastic resin F.
The RP material is laminated with a resin-rich layer of the same type of resin with zero or extremely low fiber content to form a laminate.

[Function] When molding thermoplastic resin FRP with thermoplastic resin FRP material, if a resin-rich layer of the same type is stacked and laminated between the layers, the amount of energy absorption at the time of impact will increase due to the presence of the resin-rich layer. At the same time, thermal stress between layers can be alleviated. Further, there is no boundary between the thermoplastic resin FRP material and the resin rich layer because they are of the same type, and there is no need to consider elongation or adhesion.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a thermoplastic resin FRP material 1 such as prepreg is used to mold a normal thermoplastic resin FRP (FRP-fiber reinforced composite material). Between the layers of thermoplastic resin FRP,
A resin-rich layer 2 of the same type with zero or low fiber content is added and laminated. 1a indicates fiber.

The molding materials for the resin-rich layer 2 include resin films, resin fabrics, pellets (with or without reinforcing fibers),
Use random mats, chopped fibers, etc.

The thermoplastic resin FRP of the present invention, which is formed by laminating the thermoplastic resin FRP material 1 and the resin-rich layer 2, is because the thermoplastic resin FRP material 1 and the resin-rich layer 2 are of the same type. Since the layers can be made homogeneous without clear boundaries, there is no need to consider the difference in elongation or adhesion between the layers, and there is no need to consider thermal stress between the layers. can be alleviated.

As a result, even if an impact is applied in the direction of the arrow as shown in Fig. 3, cracks 3 will not occur in the direction of lamination, and cracks will not occur in the direction along the interlayers, eliminating the risk of separation between the layers. I can do it. In addition, thermoplastic resin FRP material 1
Since the same type of resin rich layer 2 is provided between the layers, the amount of impact energy absorbed when the impact is received can be increased.

Note that the case where the resin-rich layer 2 is provided between the layers of the thermoplastic resin FRP material 1 to form a laminate is shown, or the resin-rich layer 2 is provided on the outer layer of the thermoplastic resin FRP material 1 to form a laminate. Of course, various changes may be made without departing from the gist of the claimed invention.

[Effects of the Invention] As described above, according to the thermoplastic resin FRP of the present invention, a resin-rich layer of the same type of resin with zero or very low fiber content is laminated on the thermoplastic resin FRP material in the middle. Since the structure consists of two laminated layers, there is no clear boundary between the laminated layers, making them homogeneous, and there is no need to consider elongation or adhesion. In addition to reducing stress, it is possible to increase the amount of energy absorbed during impact, there is no peeling between layers, and it is possible to increase the amount of flow during molding and improve the surface smoothness.
It can produce excellent effects such as

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the thermoplastic resin FRP of the present invention, Figure 2 is a diagram showing the direction in which cracks occur, Figure 3 is a perspective view of a conventional fiber resin composite material, and Figure 4 is a conventional one. This is a diagram showing the direction of cracking when a composite material cracks. ...Thermoplastic resin FRP material, ...Resin rich layer, ...Cracks. Patent applicant stone 1 Shimaharima Heavy Industries Co., Ltd.

Claims (1)

[Claims] (1) In thermoplastic resin FRP molded using a thermoplastic resin FRP material, a resin-rich layer made of the same type of resin with zero or extremely low fiber content is superimposed on the thermoplastic resin FRP material to form a laminate. A thermoplastic resin FRP characterized by: