JP2001328188A - Fiber reinforced resin pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems of a resin pipe that a thin one causes a warp and can not be reused, while a thick one needs to be made of several layers for thickness, for a cured resin generates heat in the process of manufacture, and this brings about disadvantages that productivity is low and the product is heavy and hard to handle, in view of the demand for the reusable resin pipe as a core of cloth, instead of a paper pipe which is impossible to reuse. SOLUTION: A fiber reinforced resin pipe 1 is provided with a foamed roll layer 3 formed inside by rolling foamed nonwoven fabric which holds numerous microballoons inside, and therefore it is light in weight and easy to handle. Though it is a thick one, a cured resin layer 4 on the outside can be made thin, since the inside of the thickness of the pipe is occupied by the foamed roll layer 3. Therefore it is possible to suppress the generation of heat from the cured resin in the process of forming the cured resin layer 4 and productivity is made excellent. Though the resin pipe 1 is light in weight, it is formed to be thick and therefore a warp or the like hardly occurs in the core, even when it is used repeatedly as the core. Thus, it can be reused for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber reinforced resin pipe serving as a core for winding cloth or the like.

[0002]

2. Description of the Related Art For example, a paper tube made of cardboard is known as a core of fabric in a fabric fabric manufacturing machine. However, this paper tube is disposable and has a problem that waste is generated. Therefore, a reusable core such as a metal pipe or a resin pipe is being replaced with a paper core.

[0003]

The core of a metal pipe is
Heavy weight makes handling difficult. Further, in the case of a resin pipe, if the core is thin, the core becomes habitable and cannot be reused. Therefore, it is necessary to manufacture a thick resin pipe. However, a thick resin pipe needs to be divided into several layers and manufactured thickly over time because the cured resin generates heat during manufacture, and a thick resin pipe has poor productivity. In addition, the thick resin pipe becomes heavy, and handling becomes difficult.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fiber reinforced resin pipe which is lightweight, has excellent productivity, and can easily increase the thickness of the pipe. It is in.

[0005]

Means for Solving the Problems A fiber reinforced resin pipe is a foam roll layer in which a plurality of foamed non-woven fabrics in which a large number of closed-cell microballoons are dispersed and held are wound together with a cured resin. And a cured resin layer formed at least outside the foamed roll layer.

According to a second aspect of the present invention, in the fiber-reinforced resin pipe according to the first aspect, the foamed nonwoven fabric is wound together with the nonwoven fabric impregnated with the cured resin.

According to a third aspect of the present invention, in the fiber reinforced resin pipe according to the first or second aspect, at least a part of the foamed nonwoven fabric is wound together with a reinforcing fiber mat.

According to a fourth aspect of the present invention, in the fiber reinforced resin pipe according to any one of the first to third aspects, the hardened resin layer is formed by winding a plurality of reinforcing fiber mats inside the hardened resin layer together with the hardened resin. It is characterized by having a fiber-containing resin layer.

[0009]

[Function and Effect of the Invention] The fiber-reinforced resin pipe has a foam roll layer formed by winding a non-woven foam holding a large number of microballoons, so that it is lightweight and easy to handle. is there. Further, since the foamed roll layer is arranged inside the cured resin layer, the thickness of the cured resin layer can be reduced, and heat generation of the cured resin during pipe production can be suppressed. Therefore, the productivity of the thick resin pipe is excellent. That is, the fiber reinforced resin pipe is lightweight and excellent in productivity, and the thickness of the pipe can be easily increased.

[Function and Effect of Claim 2] The foamed nonwoven fabric is weak to strong tension because it holds a large number of microballoons. However, in the invention of claim 2, since the foamed nonwoven fabric is wound together with the nonwoven fabric, the nonwoven fabric is subjected to tension when the foamed nonwoven fabric is wound. For this reason, breakage when the foamed nonwoven fabric holding many microballoons is wound is prevented.

According to the third aspect of the present invention, since the foamed nonwoven fabric is wound together with the reinforcing fiber mat, the strength of the foamed roll layer made of the foamed nonwoven fabric can be increased. The strength of the reinforced resin pipe can be increased.

According to the fourth aspect of the present invention, since the reinforcing fiber-containing resin layer is provided inside the cured resin layer, that is, outside the foamed roll layer, the fiber-reinforced resin pipe is formed. Strength can be increased.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to examples and modifications. FIG. 1 is a sectional view of a fiber reinforced resin pipe.
FIG. 2 shows a schematic cross-sectional view thereof. The fiber reinforced resin pipe 1 is used as a core of a cloth in a cloth cloth manufacturing machine. As shown in FIG. 1, an innermost innermost resin layer 2, an outermost foam roll layer 3, A cured resin layer 4 on the outside is provided.

As shown in FIG. 2, the innermost resin layer 2 is a relatively thin layer formed by winding a woven cloth 5 together with a cured resin 6 (for example, polyester resin) in a plurality of layers.

As shown in FIG. 2, the foam roll layer 3 is formed by winding a plurality of foamed nonwoven fabrics 7 in which a large number of closed-cell microballoons 7a are dispersed and held together with a cured resin 6 (for example, polyester resin). It is. The foamed nonwoven fabric 7 is a well-known one in which a large number of microballoons 7a are dispersed and held in a balloon holding nonwoven fabric 7b such as a polyester fiber.

The foamed nonwoven fabric 7 holds a large number of microballoons 7a and is weak against strong tension. Therefore, as shown in FIG. The non-woven fabric 8 is provided so that the non-woven fabric 8 receives tension when the wire 7 is wound. For this reason, it is prevented that the foamed nonwoven fabric 7 holding many microballoons 7a is damaged when being wound.

At least a part of the foamed nonwoven fabric 7
It is wound with a reinforcing fiber mat 9 (for example, a thin mat made of glass fiber). Specifically, as shown in FIG. 2, the inside of the foamed roll layer 3 of this embodiment is wound with a reinforcing fiber mat 9 impregnated with a cured resin 6 together with a foamed nonwoven fabric 7. It is provided to increase the strength.

The cured resin layer 4 outside the foam roll layer 3 is
The woven fabric 5 is wound with a plurality of layers together with the cured resin 6 to increase the thickness and strength. Inside the cured resin layer 4,
As shown in FIG. 2, a reinforcing fiber-containing resin layer 10 formed by winding a reinforcing fiber mat 9 with the cured resin 6 in a plurality of layers is provided. Thus, by providing the reinforcing fiber-containing resin layer 10 inside the cured resin layer 4, that is, outside the foam roll layer 3, the strength of the fiber-reinforced resin pipe 1 can be increased.

An example of the manufacturing process of the fiber reinforced resin pipe 1 will be described with reference to the flowchart of FIG. First,
The mandrel which becomes the inner core at the time of manufacturing the cylindrical fiber reinforced resin pipe 1 is rotated, and a release agent is applied to the surface of the rotating mandrel (step S1).

Next, the mandrel is rotated at a predetermined rotational speed (for example, 5 rpm).
rpm, the hardened resin 6 is applied to the mandrel, and the woven fabric 5 (for example, polyester woven fabric) is applied to the mandrel a predetermined number of times (for example, 3 times) while the hardened resin 6 is applied.
Twice) (Step S2). In addition, the cured resin 6
Is a mixture of a liquid polyester resin before curing and a curing agent and a coloring agent (gray, blue, etc.). Through the step S2, the innermost resin layer 2 described above is formed.

Next, the woven fabric 5 is cut, and the nonwoven fabric 8 made of polyester, the reinforcing fiber mat 9 and the foamed nonwoven fabric 7 are replaced with the surrounding resin layer 2 while the hardening resin 6 is applied. A predetermined number of times (for example, seven times) (step S3). The reinforcing fiber mat 9 is cut in the middle of winding. By the process of step S3, the above-described foam roll layer 3 is formed.

Next, the reinforcing fiber mat 9 is cut, and instead, the reinforcing fiber mat 9 and the nonwoven fabric 8 made of polyester are applied around the foam roll layer 3 for a predetermined number of times (for example, seven times) while the hardening resin 6 is applied. ) Wind (step S4
). Through the step S4, the reinforcing fiber-containing resin layer 10 inside the above-described cured resin layer 4 is formed.

Next, the reinforcing fiber mat 9 and the nonwoven fabric 8 are cut, and a polyester woven cloth 5 is applied around the reinforcing fiber-containing resin layer 10 a predetermined number of times (for example, 20 times) while the hardening resin 6 is applied. ) Winding (step S5). By this step S5, the cured resin layer 4 outside the reinforcing fiber-containing resin layer 10 is formed.

Next, the rotation speed of the mandrel is increased (for example, 50 rpm), and the surface is lightly pressed with a hand roller or the like to smooth it (step S6). Next, while the rotation speed of the mandrel is reduced (for example, 10 rpm), it is dried at room temperature for a predetermined time (for example, 1 hour) (Step S7).
). Next, the rotation of the mandrel is stopped, and the mandrel is dried at room temperature for a predetermined time (for example, all day and night) (step S8).

Thereafter, the dried and hardened fiber reinforced resin pipe 1 is pulled out of the mandrel using a drawing machine, and is ground so that the outer diameter becomes a predetermined size.
Cutting is performed so that the total length becomes a predetermined size (step S9). By the above steps, the fiber reinforced resin pipe 1
Is completed.

[Effects of the Embodiment] The fiber reinforced resin pipe 1 shown in this embodiment has a foam roll layer 3 in which a foamed nonwoven fabric 7 holding a large number of microballoons 7a is wound, and is therefore lightweight. Easy to handle. Although the pipe is a thick pipe having a reinforced resin layer formed around the foamed roll layer 3, the foamed roll layer 3 occupies the inside of the thickness of the pipe. Heat generation of the cured resin 6 during formation of the layer 4 can be suppressed. Therefore, the productivity of the thick fiber reinforced resin pipe 1 is excellent. That is, the fiber-reinforced resin pipe 1 shown in this embodiment is lightweight and excellent in productivity, and can easily increase the thickness of the pipe.

Although the fiber reinforced resin pipe 1 is lightweight, it is formed to be thick, so that even if it is repeatedly used as a core, the core is unlikely to have a habit such as distortion, and can be re-used for a long time. It can be used and the generation of waste can be suppressed.

[Modification] In the above embodiment, the cured resin 6
As an example, polyester is shown as an example, but another cured resin such as phenol or epoxy resin may be used.
In the innermost resin layer 2 of the above embodiment, an example is shown in which the woven fabric 5 is wound with a plurality of layers together with the cured resin 6, but a nonwoven fabric may be used instead of the woven fabric 5. Similarly, in the cured resin layer 4 of the above embodiment, an example is shown in which the woven fabric 5 is wound with a plurality of layers together with the cured resin 6, but a nonwoven fabric may be used instead of the woven fabric 5.

In the above embodiment, the nonwoven fabric 8 is wound together with the foamed nonwoven fabric 7;
A woven fabric which is excellent in impregnation property and receives tension when the foamed nonwoven fabric 7 is wound may be used. Each numerical value shown in the above embodiment is an example used for describing the embodiment,
The present invention is not limited to the numerical values shown in the embodiments, but is set as appropriate.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fiber-reinforced resin pipe.

FIG. 2 is a schematic sectional view of a fiber reinforced resin pipe.

FIG. 3 is a flowchart showing a manufacturing process of a fiber reinforced resin pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fiber reinforced resin pipe 2 Innermost resin layer 3 Foam roll layer 4 Cured resin layer 5 Woven cloth 6 Cured resin 7 Foamed nonwoven fabric 7a Micro balloon 8 Nonwoven fabric 9 Reinforced fiber mat 10 Reinforced fiber containing resin layer

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 3F058 AA01 AB01 AC04 BB11 BB15 CA00 CA09 DA04 DB05 3H111 AA01 BA15 CB03 CB14 CC02 CC03 DB19 4F100 AK01A AK01B AK44 BA02 CA02 CA13 DA11 DG11 DG15A DH01 J02AJB12 JE12JB12 JL03 4F205 AA36 AA41 AB26 AD16 AG03 AG08 AG20 HA02 HA23 HA33 HA47 HB01 HC05 HC06 HF02 HL02

Claims (4)

[Claims] 1. A foamed roll layer in which a plurality of foamed nonwoven fabrics in which a number of closed-cell microballoons are dispersed and held are wound with a cured resin, and a cured resin layer formed at least outside the foamed roll layer. A fiber-reinforced resin pipe comprising: 2. The fiber reinforced resin pipe according to claim 1, wherein the foamed nonwoven fabric is wound together with the nonwoven fabric impregnated with the cured resin. 3. The fiber-reinforced resin pipe according to claim 1, wherein at least a part of the foamed nonwoven fabric is wound together with a reinforcing fiber mat. 4. The fiber-reinforced resin pipe according to claim 1, wherein the cured resin layer has a reinforcing fiber-containing resin layer formed by winding a plurality of reinforcing fiber mats together with the cured resin inside the cured resin layer. A fiber-reinforced resin pipe, comprising: