JPH0899363A - Frp product and manufacture thereof - Google Patents

Abstract

PURPOSE: To prevent the separation of a label and improve the durability of a label or label portion by substantially setting a label in the surface of an FRP product with the surface content visibly. CONSTITUTION: When adapted on an FRP propeller shaft constituted of metallic couplings 2 joined on both ends of a main cylinder 1 of an FRP cylindrical body, a label 3 is set in the surface of the FRP main cylinder 1. In this instance, as the FRP constitutional layer is composed, e.g. of a plurality of reinforcing fiber layers 1a-1d, although the label 3 is set in the surface portion of the uppermost layer 1a, the uppermost layer 1a is available either in a resin layer consisting of only resin, or in a reinforcing fiber layer containing reinforcing fiber. The label 3 is formed integral with the main cylinder 1 by the use of resin in the case where the uppermost layer 1a consists of a resin layer, or a matrix resin in the case where the uppermost layer 1a consists of a fiber reinforcing layer. Also, the resin layer 4 covering the surface of the label 3 is made transparent substantially.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a labeled FRP product and a manufacturing method thereof.

[0002]

2. Description of the Related Art Recently, it has become obligatory for plastic products to be labeled with their material. Especially FRP
The product must be labeled with the reinforcing fiber content as well as the resin label. This display is usually performed by attaching a label to the surface of the FRP product.

[0003]

However, there is a problem that the label is easily peeled off and the durability of the label directly appearing on the surface is low only by simply attaching the label.

In view of the above situation, it is an object of the present invention to provide a labeled FRP product which can prevent the peeling of the label and can significantly improve the durability of the label or the label portion, and a manufacturing method thereof. To do.

[0005]

The FRP product of the present invention for this purpose is characterized in that a label is substantially embedded in the surface of the FRP product so that the displayed contents can be visually recognized. .

Here, in order to embed the label, it is preferable that the label is formed integrally with the FRP product by using the resin existing on the surface layer of the FRP product. The resin existing on the surface layer of the FRP product preferably covers the surface of the embedded label thinly, but it may be in an embedded state in which the surface of the label is directly exposed to the outside.

The material of the label base material is a film,
A cloth, a plate made of metal, a resin, or the like can be used. When a film or cloth is used as a substrate, a synthetic fiber cloth which becomes substantially transparent by impregnating a resin which is present in the surface layer of the substantially transparent film or FRP product is preferable. By using such a base material, the characters printed on the label, the characters displayed by embroidery, etc.
It can be displayed clearly on the surface of the RP product.

Further, by using a cloth as the base material of the label, the uncured resin existing on the surface layer of the FRP product can be easily impregnated into the label at the manufacturing stage. Due to the resin impregnation, the label is easily integrally molded with the FRP product and is more firmly embedded in the surface layer of the FRP product.

Further, a label made of metal or resin can be used as the label. For example, a label made of a plate made of metal or resin is heavier than a label made of a film or cloth as described above, and therefore, there is a problem that it is likely to drop when it is fixed to the surface of an FRP product. Therefore, in such a case, an anchor portion extending toward the inner layer of the FRP product may be formed on the label, and the anchor portion may be hooked, bited into, or pierced into the inner fiber layer. By curing the resin on the surface layer of the FRP product while being supported by the anchor part, the label is firmly embedded and fixed on the surface part of the FRP product.

Further, it is also an effective means to achieve firm fixation by providing the label with small holes through which uncured resin existing on the surface layer of the FRP product can penetrate. The resin that has entered the small holes is cured in that state,
The label is strongly supported and fixed by the resin in the small holes. Further, since the uncured resin that has entered the small holes and protruded from the small holes spreads so as to cover the surface of the label, the label can be fixed more firmly by curing this.

The method for producing an FRP product according to the present invention is F
When molding an RP product, the label is pressed against the surface of the resin layer in the uncured state of the resin layer to impregnate or permeate the uncured resin into the label, and then the resin is cured. And the method.

That is, when the surface layer of the FRP product is composed of a resin layer containing no reinforcing fiber, the resin of the resin layer is composed of the reinforcing fiber layer containing the reinforcing fiber, and of the resin layer of the resin layer. Are impregnated or infiltrated into the label attached to the surface in the uncured stage. As described above, if the label is made of cloth, the resin can be well impregnated, and if the label is perforated, the resin is better permeated. If the resin is cured in this state, the label is molded integrally with the FRP product while being embedded in the surface of the FRP product.

Since the label thus embedded in the surface of the FRP product is substantially integrally molded with the FRP product as an FRP product, it does not fall off unless the FRP product is destroyed. Also, due to the embedding, the label part F
Since the protrusion amount on the surface of the RP product is suppressed to be small, the durability of the label portion is also improved. By covering the label surface side with the FRP product surface resin layer, the durability of the label surface is significantly improved.

[0014]

The preferred embodiments of the FRP product and the manufacturing method thereof according to the present invention will be described below with reference to the drawings. 1 and 2 show an FRP product according to a first embodiment of the present invention, in which the present invention is applied to an FRP propeller shaft. FIG. 1 shows one end of the propeller shaft. Although the illustration of the other end is omitted, in the present embodiment, the configuration is the same as the illustrated end. In FIG. 1, reference numeral 1 denotes a main body cylinder made of a FRP cylinder body, and metal joints 2 are joined to both ends of the main body cylinder 1 (only one end is shown in FIG. 1) by press fitting. ing.

A thermosetting resin such as an epoxy resin, a phenol resin, a polyimide resin, a vinyl ester resin or an unsaturated polyester is used as the matrix resin forming the FRP main body cylinder 1, but other resins such as, for example, It may be a thermoplastic resin such as polyamide, polycarbonate, or polyetherimide. Further, the reinforcing fiber is not limited to carbon fiber, and for example, glass fiber, aramid fiber or the like can be used, and these can be used together.

A label 3 is embedded in the surface of the FRP main body cylinder 1. The embedding position on the surface is not particularly limited, and is set to the position A on the comparatively end side of the main body cylinder 1 in the present embodiment, but may be the outer peripheral surface position B of the joint joint.

The FRP layer structure of the main body cylinder is not particularly limited, either.
As shown in FIG. 2, a plurality of reinforcing fiber layers 1a, 1b, 1c,
The case where it is composed of 1d can be exemplified. The label 3 is embedded in the surface portion of the outermost layer 1a.
It may be either a resin layer made of only resin or a reinforcing fiber layer containing reinforcing fibers.

The label 3 is a resin present on the outermost layer 1a,
That is, when the outermost surface layer 1a is made of a resin layer, the resin forming the layer is used, and when the outermost surface layer 1a is made of a reinforcing fiber layer, the matrix resin is used to integrally mold the main body tube 1. In this example, the resin present in this surface layer,
The label 3 is embedded so as to cover the surface of the label 3 thinly. The resin layer 4 covering the surface of the label 3 is substantially transparent so that the characters (or the figure) printed on the surface side of the label 3 can be clearly seen from the surface side of the main body cylinder 1. .

Although the resin layer 4 completely covers the surface side of the label 3 in this embodiment, it may be partially covered, or the label 3 may be exposed so that the surface of the label 3 is exposed to the outside. 3 may be embedded.

The substrate of the label 3 may be a film, a synthetic fiber cloth, or a metal or resin plate. 1 and 2 show a case where the label 3 is made of a film or a synthetic fiber cloth. When the label 3 is made of film, it is preferable to use a transparent film, and when the label 3 is made of synthetic fiber cloth,
What becomes substantially transparent by impregnating the resin of the surface layer 1a is preferable. By filling the resin in the texture of the cloth, the cloth can be made transparent. Examples of the synthetic fiber cloth include nylon and polyester cloths.

Characters and the like are printed on the label 3 with ink. When the label 3 is a cloth, characters or the like may be embroidered with a thread that does not become transparent even when impregnated with a resin, regardless of printing.

When a transparent film or a cloth which is transparent by impregnation with a resin is used, the characters and the like displayed on the label 3 can be seen as if they are embedded and the underlayer can be seen as it is. There is no sense of incongruity with the embedded.

The color of the printing ink or embroidery thread is FRP.
The above color, that is, the color of the complementary color system to the color of the main body tube 1 is preferable from the viewpoint of clarifying the display. For example, when the main body cylinder 1 is mainly composed of a carbon fiber reinforced layer, the color of the main body cylinder 1 is black, and therefore it is preferable to use white ink or embroidery thread.

Such a labeled propeller shaft is manufactured as follows. The main body tube 1 is a known method,
For example, it is formed by a filament winding method, but when forming the main body cylinder 1, at least the main body cylinder 1
The label 3 is attached to a predetermined position on the surface of the main body cylinder 1 in a state where the resin existing on the outermost surface layer 1a is uncured. Since the uncured resin has an appropriate adhesiveness, no special adhesive is required for the attachment.

The attached label 3 is pressed inward in the radial direction of the main body cylinder 1 by an appropriate pressing means, for example, a tape wound around the surface of the main body cylinder 1. At this time, the label 3 is embedded in the uncured resin. In particular, when the label 3 is made of cloth, the cloth is impregnated with a resin, and the label 3 is integrated with the resin. After that, the resin is cured and the FRP product in which the label 3 is embedded is completed.

In the propeller shaft thus constructed, the label 3 is embedded in the outermost layer 1a, so that the label 3 is not peeled off unless this layer is substantially destroyed. That is,
It is molded integrally with the propeller shaft as an FRP product and is extremely firmly fixed.

Further, by constructing the label 3 with a cloth and impregnating the cloth with a resin, the fixing strength of the label 3 in the integral molding is further improved. Further, by covering the surface side of the label 3 with the thin resin layer 4, the fixing strength is further increased and the durability of the surface side of the label 3 is improved.

Further, by forming the base material of the label 3 by a transparent film or a synthetic fiber cloth which becomes transparent by resin impregnation, the characters and the like displayed on the label 3 are
The label 3 can be raised to the front surface side without feeling strange that the label 3 is embedded. By properly setting the color of ink or the like, it is possible to make the display content clear.

The label according to the present invention may be constructed as a plate made of metal or resin. However, the plate made of metal or resin is heavier than the above-mentioned film or cloth, and FR
Since it easily drops off when it is attached to the surface of the P product, it is preferable to provide an anchor function so that it will not easily fall off even before the FRP product surface layer resin is cured.

A second embodiment of the present invention is shown in FIGS. 3 and 4, for example.
As shown in the examples, a label 11 made of a metal (or resin) plate is provided with an anchor portion 12 extending obliquely downward toward the inner layer of the FRP product. The anchor portion 12 is formed by making a mountain-shaped notch in the plate body itself and pressing the inter-cut portion downward. The portion where the anchor portion 12 was present is formed in the small hole 13.

With such a configuration, as shown in FIG. 4, the label 11 embedded in the surface of the FRP product 14 is firmly supported and fixed by the anchor portion 12 that bites toward the inner layer. Especially when the surface layer is composed of a reinforcing fiber layer, the anchor portion 12 is caught by the reinforcing fiber 15,
Since it pierces the reinforcing fiber bundle, it is more firmly fixed.

Further, since the uncured resin (the matrix resin of the reinforcing fiber layer in the illustrated example) easily exudes to the surface side of the label 11 through the small holes 13, the resin layer 16 covering the surface of the label 11 is easily formed. It

Further, as shown in FIG.
A barb 18 may be further formed at the tip of the.
The presence of the barbs 18 further enhances the anchor effect.

The anchor effect can also be obtained by a structure in which only small holes are provided in the plate body. For example, as shown in FIG. 6 as a third embodiment of the present invention, a label 21 made of a plate is provided.
A plurality of small holes 22 are provided in the
You may make it the resin of the surface layer of P goods 23 penetrate. By hardening the permeated resin, a sufficiently high label 21 holding effect can be obtained.

Further, in this structure, when the label 21 is integrally molded, the pressing force applied to the label 21 is appropriately increased, so that the uncured resin oozes out on the surface side of the label 21, as shown in FIG. Thus, the resin layer 24 that covers the surface of the label 21 can be easily formed.

The structure in which the small holes 22 are simply opened is not limited to the label made of the plate body, and can be applied to the label made of the above-mentioned film or cloth.

Further, although each of the above-mentioned embodiments has been described with respect to the FRP propeller shaft, the present invention is not limited to the propeller shaft, and all FRP products such as FRP tanks and rolls, FRP golf shafts, fishing rods, etc. It is also applicable to.

[0038]

As described above, according to the FRP product and the method for producing the same of the present invention, a label is embedded on the surface of the FRP product when the surface layer resin is uncured and the resin is cured to form a label. Since the FRP product and the FRP product are integrally molded, the label can be extremely firmly fixed to the FRP product, and there is no fear of label peeling as in the conventional case.

Further, since the label is embedded in the surface of the FRP product, there is no protrusion of the label attachment part from the FRP product, or even if there is, it can be suppressed to an extremely small size. The durability of the label is significantly improved, and the necessary display can be secured stably for a long period of time.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view of an FRP product according to a first embodiment of the present invention.

FIG. 2 is an enlarged partial cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a perspective view of a label of an FRP product according to a second embodiment of the present invention.

FIG. 4 is an enlarged partial horizontal cross-sectional view taken along line IV-IV of FIG. 3 in a label-embedded state.

5 is a partial cross-sectional view of a label according to a modified example of the label of FIG.

FIG. 6 is a partial sectional view of an FRP product according to a third embodiment of the present invention.

7 is a partial cross-sectional view of the FRP product according to the modified example of FIG.

[Explanation of symbols]

 1 Propeller shaft main body cylinder as FRP product 1a Outermost layer 2 Joints 3, 11, 21 Labels 4, 16, 24 Label surface resin layer 12, 17 Anchor part 13, 22 Holes 14, 23 FRP product 15 Reinforcing fiber 18 Return

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Claims (9)

[Claims] 1. A FRP product, wherein a label is substantially embedded in the surface of the FRP product so that the displayed content can be visually recognized. 2. The FRP product according to claim 1, wherein the label is formed integrally with the FRP product by using a resin existing on a surface layer of the FRP product. 3. The FRP product according to claim 2, wherein the resin present on the surface layer of the FRP product covers the surface of the label. 4. The FRP product according to claim 1, wherein the label is made of a substrate that is substantially transparent or becomes substantially transparent when impregnated with a resin. 5. The FRP product according to claim 1, wherein the label is made of metal or resin. 6. The label has a small hole, and the FR has a small hole.
The FRP product according to any one of claims 1 to 5, wherein the P product resin has entered. 7. The FRP product according to claim 1, wherein an anchor portion is formed on the label. 8. The FRP product is a propeller shaft,
The FRP product according to any one of claims 1 to 7. 9. When molding an FRP product, a label is pressed against the surface of the resin layer in the uncured state of the resin layer to impregnate or permeate the uncured resin into the label, and then the resin is applied. A method for producing an FRP product, which comprises curing.