JPH0574755B2 - - Google Patents
Info
- Publication number
- JPH0574755B2 JPH0574755B2 JP61240474A JP24047486A JPH0574755B2 JP H0574755 B2 JPH0574755 B2 JP H0574755B2 JP 61240474 A JP61240474 A JP 61240474A JP 24047486 A JP24047486 A JP 24047486A JP H0574755 B2 JPH0574755 B2 JP H0574755B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- layer
- resin layer
- corrosion
- resistant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 37
- 239000000057 synthetic resin Substances 0.000 claims description 37
- 230000007797 corrosion Effects 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 16
- 239000012783 reinforcing fiber Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 230000003014 reinforcing effect Effects 0.000 description 11
- 238000005336 cracking Methods 0.000 description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
- 235000011613 Pinus brutia Nutrition 0.000 description 3
- 241000018646 Pinus brutia Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は繊維強化合成樹脂管（FRP管）に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to fiber-reinforced synthetic resin pipes (FRP pipes).
従来の技術
従来、繊維強化合成樹脂管（以下、FRP管と
称す）は、第２図に示すように、内側から外側に
向つて、耐食層（樹脂＋サーフエーサ）１１、チ
ヨツプストランドマツト層１２、強化層（フイラ
メントワインデイングによるもの）１３、樹脂層
１４が順に形成されたものである。なお、強化層
の内側にチヨツプストランドマツト層を設けたの
は、強化層と耐食層との剛性の急変を防止するた
めである。Conventional technology Conventionally, as shown in Fig. 2, a fiber-reinforced synthetic resin pipe (hereinafter referred to as an FRP pipe) has a corrosion-resistant layer (resin + surfer) 11 and a tip strand mat layer, which are arranged from the inside to the outside. 12, a reinforcing layer (by filament winding) 13, and a resin layer 14 are formed in this order. The purpose of providing the chip strand mat layer inside the reinforcing layer is to prevent sudden changes in rigidity between the reinforcing layer and the corrosion-resistant layer.
発明が解決しようとする問題点
ところで、上記樹脂管において、内圧が加わる
と、通常耐食層が割れてウイーピングを生じて破
損する。割れが生じるひずみは0.7〜0.9％で樹脂
本来の破断伸び（４〜６％）に比べてかるかに小
さいばかりでなく、強化層の伸びより小さい。こ
のため、FRP管は、強化層本来の強度を発揮で
きないという問題があつた。その理由としては、
内圧を受けて強化層のフイラメントが変形してフ
イラメントと樹脂とがせん断はく離し、その結果
フイラメントに沿つた空洞が発生し、これがき裂
となつて樹脂内に進展して耐食層がが割れるので
ある。ところで、チヨツプストランドマツト層
は、上記のき裂の進展を止める役割を果たすので
あるが、そのとき裂防止の能力には限界がある。
すなわち、強化層とチヨツプストランドマツト層
との境界層において、強化層側に突出したチヨツ
プストランドマツト層に傷が生じると、これがチ
ヨツプストランドマツト層内に伝播してしまうた
めである。Problems to be Solved by the Invention By the way, in the above-mentioned resin pipe, when internal pressure is applied, the corrosion-resistant layer usually cracks, causing weeping and damage. The strain at which cracking occurs is 0.7 to 0.9%, which is not only much smaller than the resin's original elongation at break (4 to 6%), but also smaller than the elongation of the reinforcing layer. For this reason, FRP pipes have had the problem of not being able to demonstrate the original strength of the reinforcing layer. The reason is that
The filament of the reinforcing layer is deformed by the internal pressure, causing the filament and the resin to shear and separate, resulting in a cavity along the filament, which becomes a crack and propagates into the resin, causing the corrosion-resistant layer to crack. be. By the way, the tip strand mat layer plays the role of stopping the growth of the above-mentioned cracks, but there is a limit to its ability to prevent cracks.
In other words, in the boundary layer between the reinforcing layer and the tip strand pine layer, if a flaw occurs in the tip strand pine layer protruding toward the reinforcing layer side, this will propagate into the tip strand pine layer. be.
そこで、本発明は上記問題を解消し得る繊維強
化合成樹脂管を提供することを目的とする。 Therefore, an object of the present invention is to provide a fiber-reinforced synthetic resin pipe that can solve the above problems.
問題を解決するための手段
上記問題を解決するため、本発明の繊維強化合
成樹脂管は、外側から内側に向つて、合成樹脂
層、強化用繊維を有する強化合成樹脂層、高伸度
合成樹脂層および耐食性合成樹脂層を順に形成し
たものである。Means for Solving the Problems In order to solve the above problems, the fiber-reinforced synthetic resin pipe of the present invention has a synthetic resin layer, a reinforced synthetic resin layer having reinforcing fibers, a high elongation synthetic resin layer and a corrosion-resistant synthetic resin layer are formed in this order.
作 用
上記構成においては、強化合成樹脂層と耐食性
合成樹脂層との間に、高伸度合成樹脂層を介在し
たので、強化合成樹脂層にき裂が発生した場合、
高伸度合成樹脂層の部分でき裂が停止するため、
耐食性合成樹脂層に割れが生じるのを防止でき、
したがつて強化合成樹脂層の能力は十分に発揮し
得る。Effect In the above structure, since the high elongation synthetic resin layer is interposed between the reinforced synthetic resin layer and the corrosion-resistant synthetic resin layer, if a crack occurs in the reinforced synthetic resin layer,
Because the cracking stops at the high elongation synthetic resin layer,
It can prevent cracks from occurring in the corrosion-resistant synthetic resin layer,
Therefore, the ability of the reinforced synthetic resin layer can be fully demonstrated.
実施例
以下、本発明の一実施例を図面に基づき説明す
る。Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.
本発明の係る繊維強化合成樹脂管すなわち
FRP管は、第１図に示すように、外側から内側
に向つて合成樹脂層（以下、樹脂層という）１、
強化用繊維としてロービングクロスが使用された
強化合成樹脂層（以下、強化層という）２、高伸
度合成樹脂層（以下、高伸度樹脂層という）３お
よび耐食性合成樹脂層（以下、耐食層という）４
が順に形成されたものである。なお、このFRP
管は遠心成形法につて製造される。上記高伸度樹
脂層３における樹脂には、伸びが10％以上のもの
が使用され、また高伸度樹脂層３の厚さは耐食層
４の厚さと同程度にされている。 Fiber-reinforced synthetic resin pipe according to the present invention, namely
As shown in Figure 1, an FRP pipe consists of a synthetic resin layer (hereinafter referred to as a resin layer) 1,
A reinforced synthetic resin layer (hereinafter referred to as "reinforced layer") 2 in which roving cloth is used as a reinforcing fiber, a high elongation synthetic resin layer (hereinafter referred to as "high elongation resin layer") 3, and a corrosion-resistant synthetic resin layer (hereinafter referred to as "corrosion-resistant layer") )4
were formed in sequence. Furthermore, this FRP
The tube is manufactured using a centrifugal molding process. The resin used in the high elongation resin layer 3 has an elongation of 10% or more, and the thickness of the high elongation resin layer 3 is approximately the same as the thickness of the corrosion-resistant layer 4.
上記のFRP管によると、強化層２にロービン
グクロスが使用されているため、強化用繊維は管
円周方向と管軸方向、すなわち内圧負荷時の主応
力方向に沿つて配置されることになり、また遠心
力によりプリテンシヨンがかけられている状態と
なつている。したがつて、強化用繊維は管軸方向
に変位が生じにくくなつているため、FRP管に
内圧が加わつても、強化用繊維と樹脂とのせん断
力によるはく離がほとんど生じなくなる。また、
耐食層４と強化層２との間には、高伸度樹脂層３
が介在されているので、仮に強化層２にき裂が生
じても、高伸度樹脂層３の部分でき裂が停止する
ため、耐食層４に割れが生じることはない。 According to the above FRP pipe, since roving cloth is used in the reinforcing layer 2, the reinforcing fibers are arranged along the pipe circumferential direction and the pipe axial direction, that is, the principal stress direction when internal pressure is applied. , and is in a state where pretension is applied due to centrifugal force. Therefore, since the reinforcing fibers are less likely to be displaced in the pipe axis direction, even if internal pressure is applied to the FRP pipe, peeling between the reinforcing fibers and the resin due to shear force will hardly occur. Also,
A high elongation resin layer 3 is provided between the corrosion resistant layer 4 and the reinforcing layer 2.
is interposed, so even if a crack occurs in the reinforcing layer 2, the crack will stop at the high elongation resin layer 3, and no crack will occur in the corrosion-resistant layer 4.
発明の効果
上記本発明の構成によると、強化合成樹脂層と
耐食性合成繊維層との間に、高伸度合成樹脂層を
介在したので、強化合成樹脂層にき裂が発生した
場合、高伸度合成樹脂層の部分でき裂が停止する
ため、耐食性合成樹脂層に割れが生じるのを防止
でき、したがつて強化合成樹脂層の能力すなわち
強度は十分に発揮し得る。Effects of the Invention According to the above structure of the present invention, since the high elongation synthetic resin layer is interposed between the reinforced synthetic resin layer and the corrosion-resistant synthetic fiber layer, when a crack occurs in the reinforced synthetic resin layer, the high elongation Since the cracking stops at a portion of the synthetic resin layer, it is possible to prevent the corrosion-resistant synthetic resin layer from cracking, and therefore the ability, that is, the strength, of the reinforced synthetic resin layer can be fully exhibited.
第１図は本発明の一実施例にかかる合成樹脂管
の要部断面図、第２図は従来例の合成樹脂管の要
部断面図である。
１…合成樹脂層、２…強化合成樹脂層、３…高
伸度合成樹脂層、４…耐食性合成樹脂層。
FIG. 1 is a sectional view of a main part of a synthetic resin pipe according to an embodiment of the present invention, and FIG. 2 is a sectional view of a main part of a conventional synthetic resin pipe. 1...Synthetic resin layer, 2...Reinforced synthetic resin layer, 3...High elongation synthetic resin layer, 4...Corrosion-resistant synthetic resin layer.
Claims (1)
繊維を有する強化合成樹脂層、高伸度合成樹脂層
および耐食性合成樹脂層を順に形成したことを特
徴とする繊維強化合成樹脂層管。1. A fiber-reinforced synthetic resin layered pipe characterized in that a synthetic resin layer, a reinforced synthetic resin layer having reinforcing fibers, a high elongation synthetic resin layer, and a corrosion-resistant synthetic resin layer are sequentially formed from the outside to the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61240474A JPS6396384A (en) | 1986-10-09 | 1986-10-09 | Fiber-reinforced synthetic resin pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61240474A JPS6396384A (en) | 1986-10-09 | 1986-10-09 | Fiber-reinforced synthetic resin pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6396384A JPS6396384A (en) | 1988-04-27 |
| JPH0574755B2 true JPH0574755B2 (en) | 1993-10-19 |
Family
ID=17060054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61240474A Granted JPS6396384A (en) | 1986-10-09 | 1986-10-09 | Fiber-reinforced synthetic resin pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6396384A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0622913B2 (en) * | 1989-07-07 | 1994-03-30 | 旭有機材工業株式会社 | FRP reinforced vinyl chloride resin pipe joint and method for producing the same |
| JP5582777B2 (en) * | 2009-12-18 | 2014-09-03 | 日立造船コンポジットマテリアル株式会社 | Tubular fiber reinforced composite material with corrosion resistant layer |
| JP6103538B2 (en) * | 2013-10-31 | 2017-03-29 | 住友金属鉱山エンジニアリング株式会社 | Fiber reinforced plastic and method for producing the same |
| JP6471358B2 (en) * | 2016-01-04 | 2019-02-20 | 高橋 寿庭 | Rust-proof substrate structure, rust-proof specification vehicle, rust-proof specification machine, and method for forming base structure with rust-proof film |
| KR101935311B1 (en) * | 2016-02-23 | 2019-04-08 | 주식회사 동일씨앤이 | Dual composite material duct |
-
1986
- 1986-10-09 JP JP61240474A patent/JPS6396384A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6396384A (en) | 1988-04-27 |
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