JPH04366603A - Fiber-reinforced bonded wood and its manufacture - Google Patents

Abstract

PURPOSE:To improve tensile strength, by a method wherein a resin impregnated reinforced fiber body is laid within a groove provided in confronting surfaces of arbitrary sawn sheets of bonded wood comprised by laminating a plurality of the sawn sheets. CONSTITUTION:Eight sawn sheets 1 are laminated and stuck to one another through phenolic resin 2. It is constituted so that resin impregnated reinforced fiber body 3 is laid into a space between the second and third layers from the lower side, which are confronted with each other. The resin impregnated reinforced fiber body 3 is constituted so that it is obtained by braiding light pieces of strands of aromatic polyamide fibers into a round eight piece braidlike state, which is impregnated with epoxy resin, a groove 4 is cut into the top of the sawn sheet 1 of the second layer from the lower part, the resin impregnated reinforced fiber body 3 under an uncured state is arranged into the groove 4 and then the whole sawn sheets 1 are stuck to one another through phenolic resin 2. With the construction, since the same is arranged within the groove provided into a cnnfronting surfaces of the sawn sheet having flexibility, the arrangement is performed easily and appropriately.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fiber-reinforced laminated wood and a method for producing the same.

0002

BACKGROUND OF THE INVENTION Conventional laminated wood is generally made by laminating sawn sawn boards together using an adhesive.

0003

Problems to be Solved by the Invention Regarding the conventional laminated wood, especially when used as a beam material, further improvement in tensile strength is desired.

[0004] The present invention has been made in response to such a need, and an object of the present invention is to provide laminated wood having improved tensile strength and a simple method for producing the same.

[0005]

[Means for Solving the Problems] The fiber-reinforced laminated wood of the present invention is made by laminating a plurality of laminated sawn boards, and has a resin-impregnated reinforcing fiber body in a groove provided on the opposing surface of any sawn board. It is characterized by being buried.

[0006] Also, the manufacturing method includes arranging an uncured resin-impregnated reinforcing fiber body in a groove provided on the opposing surface of the arbitrary sawing boards, and then adhering the laminated sawn boards. Features.

[0007] Any sawn sawn board can be used as the sawn board,
Since there is no particular difference from conventional laminated wood in that a plurality of sheets are laminated and bonded together, a detailed explanation of this point will be omitted.

[0008] These sawn boards are laminated and bonded using an adhesive such as phenol resin, but it is not necessary to embed resin-impregnated reinforcing fibers between all the opposing surfaces between these laminated sawn boards. A resin-impregnated reinforcing fiber body may be buried between arbitrary opposing surfaces depending on the required strength.

The reinforcing fibers of the resin-impregnated reinforcing fibers used in the present invention generally have a tensile strength of 100 kg/mm.
Two or more reinforcing fibers, such as inorganic fibers such as carbon fibers, glass fibers, and ceramic fibers, organic fibers such as aromatic polyamide fibers, polyester fibers, high-strength polyolefin fibers, strong polyamide fibers, and strong polyvinyl alcohol fibers, can be used alone. Alternatively, a combination of these may be arranged in parallel or knitted into a braided form.From the viewpoint of adhesion strength to the sawn board, it is preferable to knit it into a braided form.

[0010] Further, as the resin to be impregnated into the reinforcing fiber body, epoxy type, polyester type, vinyl ester type,
The material may be phenol-based, polyimide-based, alkali metal silicate-based, colloidal silica-based, or the like.

[0011] In the production of laminated wood, opposing grooves corresponding to half the cross section of the reinforcing fiber body are provided on each of the opposing surfaces of a given sawn board, or opposing grooves corresponding to the entire cross section of the reinforcing fiber body are provided on only one surface. A groove is provided, an uncured resin-impregnated reinforcing fiber body is placed in the groove, and then the laminated sawn boards are bonded. In this case, the reinforcing fiber body itself is coated with uncured resin. It may be impregnated, but if the groove is coated with a resin for adhesion of sawn boards, by placing reinforcing fibers that are not impregnated with resin, the uncured resin-impregnated reinforcing fibers will be applied to the grooves. This makes the manufacturing process easier.

0012

[Operation] The fiber-reinforced laminated wood of the present invention is reinforced by the resin-impregnated reinforcing fiber body embedded in the groove provided on the opposing surface of any sawn board, and its tensile strength is improved.

[0013] In the method for manufacturing fiber-reinforced laminated wood of the present invention, the reinforcing fiber body is placed in the groove provided on the opposing surface of the sawn board before being hardened by the impregnated resin, that is, in a flexible state. , its arrangement can be done easily and appropriately.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an example of fiber-reinforced laminated wood according to the present invention, which has a width of 150 mm, a length of 10 m, and a thickness of about 6 mm.
Eight 0 mm sawn boards 1 are laminated and bonded via phenolic resin 2, and in the illustrated example, a resin-impregnated reinforcing fiber body 3 is buried between the facing surfaces of the second layer and the third layer from below. I did it like that. The resin-impregnated reinforcing fiber body 3 is made by knitting 8 strands of aromatic polyamide fibers into a circular braid shape and impregnating it with epoxy resin.As shown in FIG. A groove 4 is cut in the groove 4, an uncured resin-impregnated reinforcing fiber body 3 is placed in the groove 4, and then all the sawing boards 1 are bonded together via the phenolic resin 2.

In the above embodiment, the reinforcing fiber body 3 was directly impregnated with resin, but the phenolic resin 2 used for adhesion between the sawing boards 1 was used to impregnate the reinforcing fibers 3 into the grooves 4. It is also possible to fill the reinforcing fiber body 3 with a phenolic resin 2 which is used for adhesion between the sawn boards 1, and to use the filled phenolic resin 2 to impregnate the reinforcing fiber body 3 with the resin.

In any case, the reinforcing fibers are placed in the grooves provided on the facing surface of the sawing board in a flexible state before being hardened by the impregnated resin, so the placement is easy. be able to.

[0018]

Effects of the Invention As described above, when using the fiber-reinforced laminated wood of the present invention, the laminated wood is reinforced by the resin-impregnated reinforcing fiber body embedded in the groove provided on the opposing surface of any sawn board, and the tensile strength is increased. In addition, according to the method for producing fiber-reinforced laminated wood of the present invention, before the reinforcing fiber body is hardened with the impregnated resin, that is, in a flexible state, the fiber-reinforced laminated wood is Since it is placed in a groove provided in the surface, it has the advantage that it can be placed easily and appropriately.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of fiber-reinforced laminated wood according to the present invention.

FIG. 2 is a partially cutaway perspective view of an embodiment of the fiber-reinforced laminated wood of the present invention.

Claims (2)

[Claims] 1. A fiber-reinforced laminated wood comprising a laminated wood made of a plurality of laminated sawn boards, characterized in that a resin-impregnated reinforcing fiber body is embedded in a groove provided on the opposing surface of any sawn board. 2. A method for producing fiber-reinforced laminated wood, in which a resin-impregnated reinforcing fiber body is embedded in a groove provided on the opposing surface of any sawn board of a laminated wood made by laminating a plurality of sawn boards, comprising: , a fiber-reinforced laminated wood characterized in that an uncured resin-impregnated reinforcing fiber body is placed in a groove provided on the opposing surface of any of the sawn boards, and then the laminated sawn boards are bonded. Production method.