JP3421956B2 - Method for producing flexible structural material - Google Patents
Method for producing flexible structural materialInfo
- Publication number
- JP3421956B2 JP3421956B2 JP28121593A JP28121593A JP3421956B2 JP 3421956 B2 JP3421956 B2 JP 3421956B2 JP 28121593 A JP28121593 A JP 28121593A JP 28121593 A JP28121593 A JP 28121593A JP 3421956 B2 JP3421956 B2 JP 3421956B2
- Authority
- JP
- Japan
- Prior art keywords
- binder
- fibrous body
- structural material
- fiber
- braid
- 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
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は例えば代替鉄筋等のよう
にコンクリート、プラスチック等の引っ張り強度の低い
構造用材料内に埋設して引っ張り強度を強化するために
用いる可撓性構造用材料の製造方法に関する。
【０００２】
【従来の技術】従来、この種の構造用材料としては補強
繊維の繊維束を組紐状に編成して構成された繊維体の各
補強繊維を結合剤で結合した構造用材料が知られてい
る。しかしながら、かかる構造用材料には可撓性がない
ため、これに可撓性を与えるために、例えばエポキシ樹
脂等の結合剤を含浸した芳香族ポリアミド繊維等の補強
繊維の繊維束の表面にポリエチレンもしくはポリプロピ
レンを被覆し、これを組紐状に編成した後、所定の形状
において該結合剤を硬化させ、該被覆ポリプロピレンに
よって繊維束間の結合を防止して構造用材料に可撓性を
もたせる製造方法が行なわれていた。
【０００３】
【発明が解決しようとする課題】しかしながら、前記従
来法による場合は補強繊維の繊維束の表面にポリエチレ
ンもしくはポリプロピレンを被覆する工程があるため、
製造法が複雑となる不都合があった。
【０００４】本発明は前記従来法の欠点を解消し、工程
が簡単な可撓性構造用材料の製造方法を提供することを
目的とする。
【０００５】
【課題を解決するための手段】本発明の可撓性構造用材
料の製造方法は、補強繊維の繊維束を組紐状に編成して
構成され且つ結合剤を含浸された繊維体を用意し、該繊
維体の結合剤を半硬化させると共に、該含浸結合剤が半
硬化の状態で該繊維体に屈曲動作を与えて繊維束間の結
合を解き、その後該結合剤を本硬化させることを特徴と
する。
【０００６】
【作用】屈曲動作では繊維束間の結合のみが解かれ、各
繊維束を構成する補強繊維間の結合は解かれないままの
状態であり、本硬化において、補強繊維同志を結合する
結合剤は硬化する。
【０００７】
【実施例】本発明で用いる補強繊維としては、補強すべ
き構造用材料よりも引っ張り強度の大きなものであれ
ば、特に限定されるものではないが、通常は引っ張り強
度が100kg／mm2以上のものを用い、例えば炭素繊維、ガ
ラス繊維、セラミック繊維等の無機繊維、芳香族ポリア
ミド繊維、ポリエステル繊維、高強度ポリオレフィン繊
維、強力ポリアミド繊維、強力ポリビニルアルコール繊
維等の有機繊維、或いは金属繊維を単独で或いはこれら
を組合せて用いることができる。
【０００８】繊維体は前記補強繊維の繊維束を丸打紐
状、角打紐状、平打紐状等、種々の組紐状に編成して構
成される。
【０００９】結合剤としては、エポキシ系樹脂、ポリエ
ステル系樹脂、ビニルエステル系樹脂、フェノール系樹
脂、ポリイミド系樹脂、アルカリ金属ケイ酸塩系、コロ
イダルシリカ系等任意であるが、耐薬品性、耐熱性、作
業性、経済性等の観点からエポキシ系樹脂が好ましい。
【００１０】繊維体への結合剤の含浸は、補強繊維の段
階で含浸しても、それを繊維束にした段階で含浸して
も、或いは繊維体に構成してから含浸しても任意である
が、繊維体に構成してから含浸する方が、工程管理上か
ら好ましい。
【００１１】また、結合剤の半硬化とは、例えばエポキ
シ樹脂におけるＢステージの硬化等のように、結合剤の
柔軟性は保持しているが、この状態の同じ両者を結合さ
せても、もはや接着を生じない程度の硬化度を示す。
【００１２】以下添付図面に従って本発明の具体的実施
例を説明する。
【００１３】図１は本発明製造方法の工程線図であっ
て、図中、１は公知の組紐編成装置を示す。先ず、例え
ば芳香族ポリアミド繊維（デュポン社製、商品名ケブラ
ー４９）で構成される細線２から成る約32,000本の繊維
束（ストランドともいう）３を８本、組紐編成装置１を
用いて丸打組紐状に編成して、直径７mmの繊維体４を作
製した。
【００１４】次に、得られた繊維体４を緩み用ロール
５，５間を通過させて、各繊維束３の各細線２間に緩み
を入れ、その後、緩みを入れられた繊維体４を例えばエ
ポキシ樹脂の結合剤６を収容せる含浸槽７内を通過させ
て、該繊維体４に結合剤６を含浸させる。
【００１５】次いで、結合剤６を含浸された繊維体４表
面の余剰結合剤を該含浸槽７の上方に配置された余剰結
合剤拭き取り用スクイズ８で拭き取り除いた後、繊維体
４をニップロール９と引取用キャタピラー１０間を所望
張力に調整しながら走行させ、先ず、温度90〜160℃程
度に設定された第１加熱炉１１内を通過させながら、結
合剤を半硬化させる。尚、第１加熱炉内の通過時間は20
〜40分間程度とした。
【００１６】続いて、結合剤が半硬化状態の繊維体４を
複数の搬送用ロール１２，１２を互違いに配置された繊
維体屈曲装置１３の搬送用ロール１２，１２間を蛇行状
に通過させ、繊維体４に屈曲動作を与えて該繊維体４の
結合を解きほごして、繊維束３間の結合を解いた。
【００１７】次いで、繊維束３間の結合が解かれた繊維
体４を温度150〜200℃程度に設定された第２加熱炉１４
内を通過させながら結合剤を本硬化させる。尚、第２加
熱炉内の通過時間は10〜20分間程度とした。
【００１８】その後、該繊維体４を常温まで冷却した。
得られた製品は可撓性に富み、その強度は7,000kgfを得
た。
【００１９】尚、図中、１５は含浸槽７に配置したガイ
ドロールを示す。
【００２０】前記実施例では、結合剤の半硬化を単一の
加熱炉（図示装置の第１加熱炉）内を繊維体を通過する
ことにより与えたが、このような方法に限らず、結合剤
の種類に対応させて、例えば炉内温度が80〜100℃、100
〜120℃、120〜160℃のように夫々設定された加熱炉を
３炉直列状態に配置し、各炉内を結合剤が含浸された繊
維体を順次通過させて結合剤を半硬化させる方法で行っ
てもよい。
【００２１】
【発明の効果】このように本発明によるときは、従来の
ようにポリエチレン被覆を行なう等の複雑な工程を要す
ることなく簡単な方法で、しかも繊維体の屈曲工程を加
えるだけで、従来の非可撓性構造用材料の製造ラインを
そのまま利用して可撓性構造用材料を製造することが出
来る効果を有する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for embedding in a structural material having a low tensile strength, such as concrete or plastic, such as an alternative reinforcing bar, to increase the tensile strength. The present invention relates to a method for producing a flexible structural material used in the method. Heretofore, as this kind of structural material, there has been known a structural material in which each reinforcing fiber of a fibrous body formed by knitting a fiber bundle of reinforcing fibers into a braid is connected with a binder. Have been. However, since such a structural material is not flexible, in order to give it flexibility, the surface of a fiber bundle of a reinforcing fiber such as an aromatic polyamide fiber impregnated with a binder such as an epoxy resin is coated with polyethylene. Alternatively, a method for producing a structure material in which a polypropylene is coated and knitted into a braid, the binder is cured in a predetermined shape, and the coated polypropylene prevents bonding between fiber bundles to make the structural material flexible. Was being done. [0003] However, in the case of the conventional method, there is a step of coating the surface of the fiber bundle of the reinforcing fibers with polyethylene or polypropylene.
There was a disadvantage that the manufacturing method became complicated. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a flexible structural material which can solve the above-mentioned drawbacks of the conventional method and has simple steps. SUMMARY OF THE INVENTION A method for producing a flexible structural material according to the present invention is a method for knitting a fiber bundle of reinforcing fibers into a braid and impregnating a fibrous body impregnated with a binder. Preparing and semi-curing the binder of the fibrous body, and giving the bending action to the fibrous body in a state where the impregnated binder is in a semi-cured state, to break the bond between the fiber bundles, and thereafter, the main curing of the binder It is characterized by the following. In the bending operation, only the connection between the fiber bundles is released, and the connection between the reinforcing fibers constituting each fiber bundle remains unresolved. In the main curing, the reinforcing fibers are connected to each other. The binder cures. The reinforcing fiber used in the present invention is not particularly limited as long as it has a tensile strength greater than that of the structural material to be reinforced, but usually the tensile strength is 100 kg / mm. Use two or more, for example, inorganic fibers such as carbon fiber, glass fiber, and ceramic fiber, aromatic polyamide fibers, polyester fibers, high-strength polyolefin fibers, organic fibers such as strong polyamide fibers and strong polyvinyl alcohol fibers, or metal fibers. Can be used alone or in combination. [0008] The fibrous body is formed by knitting the fiber bundle of the reinforcing fibers into various braids such as a round braid, a square braid, and a flat braid. The binder may be any of an epoxy resin, a polyester resin, a vinyl ester resin, a phenol resin, a polyimide resin, an alkali metal silicate, a colloidal silica, and the like. Epoxy resins are preferred from the viewpoints of workability, workability, economy and the like. [0010] The impregnation of the binder into the fibrous body can be performed by impregnation at the stage of reinforcing fibers, impregnation at the stage of forming the fiber bundle, or impregnation after forming into the fibrous body. However, it is preferable from the viewpoint of process control that the fiber body is impregnated after it is formed. Further, the semi-curing of the binder means that the flexibility of the binder is maintained as in the curing of the B stage in an epoxy resin, for example. Indicates a degree of curing that does not cause adhesion. A specific embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a process diagram of the manufacturing method of the present invention, in which 1 indicates a known braid knitting apparatus. First, for example, eight 32,000 fiber bundles (also referred to as strands) 3 composed of thin wires 2 composed of aromatic polyamide fibers (manufactured by DuPont, trade name Kevlar 49) are rounded using the braid knitting apparatus 1. By knitting into a braid, a fibrous body 4 having a diameter of 7 mm was produced. Next, the obtained fibrous body 4 is passed between the loosening rolls 5 and 5 to make looseness between the thin wires 2 of each fiber bundle 3 and then the loosened fibrous body 4 is removed. For example, the fibrous body 4 is impregnated with the binder 6 by passing through an impregnation tank 7 containing a binder 6 of an epoxy resin. Next, the excess binder on the surface of the fibrous body 4 impregnated with the binder 6 is wiped off by a surplus binder wiping squeeze 8 arranged above the impregnation tank 7, and then the fibrous body 4 is nip roll 9. The take-up caterpillar 10 is moved while being adjusted to a desired tension. First, the binder is semi-cured while passing through the first heating furnace 11 set at a temperature of about 90 to 160 ° C. The passage time in the first heating furnace is 20
It took about 40 minutes. Subsequently, the fibrous body 4 in which the binder is in a semi-cured state passes in a meandering manner between the transporting rolls 12 of the fibrous body bending apparatus 13 in which a plurality of transporting rolls 12 are alternately arranged. Then, a bending operation was given to the fibrous body 4 to release and bond the fibrous body 4, thereby releasing the connection between the fiber bundles 3. Next, the fibrous body 4 in which the bonding between the fiber bundles 3 has been released is placed in the second heating furnace 14 set at a temperature of about 150 to 200 ° C.
The binder is fully cured while passing through. The passage time in the second heating furnace was set to about 10 to 20 minutes. Thereafter, the fibrous body 4 was cooled to room temperature.
The obtained product was highly flexible and the strength was 7,000 kgf. In the figure, reference numeral 15 denotes a guide roll disposed in the impregnation tank 7. In the above embodiment, the semi-curing of the binder is performed by passing the fibrous body through a single heating furnace (the first heating furnace in the illustrated apparatus), but the invention is not limited to such a method. Depending on the type of agent, for example, the furnace temperature is 80 to 100 ° C, 100
A method of arranging three heating furnaces set in series at ~ 120 ° C and 120-160 ° C in series, and passing the fibrous body impregnated with the binder sequentially through each furnace to semi-harden the binder. May be performed. As described above, according to the present invention, a complicated method such as a conventional polyethylene coating is not required, and a simple method of bending a fiber is added. There is an effect that the flexible structural material can be manufactured using the conventional inflexible structural material manufacturing line as it is.
【図面の簡単な説明】
【図１】 本発明可撓性構造用材料の製造方法の一実施
例の工程線図である。
【符号の説明】
１ 組紐編成装置、 ２ 細線、 ３
繊維束、４ 繊維体、 ６ 結合剤、
７ 含浸槽、１１ 第１加熱炉、 １３
繊維体屈曲装置、１４ 第２加熱炉。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process chart of one embodiment of a method for producing a flexible structural material of the present invention. [Description of Signs] 1 Braid knitting device, 2 Fine wire, 3
Fiber bundle, 4 fiber body, 6 binder,
7 impregnation tank, 11 first heating furnace, 13
Fibrous body bending device, 14 second heating furnace.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 島本 明 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所 神戸総合技術研 究所内 (72)発明者 材寄 勉 兵庫県尼崎市中浜町10番地１ 神鋼鋼線 工業株式会社内 (56)参考文献 特開 平４−368549（ＪＰ，Ａ) 特開 平４−214487（ＪＰ，Ａ) 特開 平２−255323（ＪＰ，Ａ) 特開 昭63−205326（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 70/00 - 70/88 E04C 5/07 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akira Shimamoto 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel, Ltd. Kobe Research Institute (72) Inventor Tsutomu Yori, Amagasaki-shi, Hyogo 10-1 Nakahamacho Shinko Steel Wire Industry Co., Ltd. (56) References JP-A-4-368549 (JP, A) JP-A-4-214487 (JP, A) JP-A-2-255323 (JP, A) JP-A-63-205326 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B29C 70/00-70/88 E04C 5/07
Claims (1)
成され且つ結合剤を含浸された繊維体を用意し、該繊維
体の結合剤を半硬化させると共に、該含浸結合剤が半硬
化の状態で該繊維体に屈曲動作を与えて繊維束間の結合
を解き、その後該結合剤を本硬化させることを特徴とす
る可撓性構造用材料の製造方法。(57) [Claims 1] A fibrous body constituted by knitting a fiber bundle of reinforcing fibers into a braid and impregnated with a binder is prepared, and the binder of the fibrous body is semi-cured. A flexible structural material characterized in that, while the impregnated binder is in a semi-cured state, the fibrous body is given a bending operation to break the bond between the fiber bundles, and thereafter the binder is fully cured. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28121593A JP3421956B2 (en) | 1993-11-10 | 1993-11-10 | Method for producing flexible structural material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28121593A JP3421956B2 (en) | 1993-11-10 | 1993-11-10 | Method for producing flexible structural material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07132560A JPH07132560A (en) | 1995-05-23 |
| JP3421956B2 true JP3421956B2 (en) | 2003-06-30 |
Family
ID=17635972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28121593A Expired - Lifetime JP3421956B2 (en) | 1993-11-10 | 1993-11-10 | Method for producing flexible structural material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3421956B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021853B (en) * | 2021-03-24 | 2022-09-02 | 哈尔滨复合材料设备开发有限公司 | Winding device and winding method for producing fiber composite material endless chain |
-
1993
- 1993-11-10 JP JP28121593A patent/JP3421956B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07132560A (en) | 1995-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3821467B2 (en) | Reinforcing fiber base material for composite materials | |
| JPH0718206B2 (en) | Method of manufacturing structural rod | |
| WO1994011590A1 (en) | Fiber-reinforced plastic rod and method of manufacturing the same | |
| JP3421956B2 (en) | Method for producing flexible structural material | |
| JP5624871B2 (en) | Method for producing flat fiber reinforced plastic wire sheet | |
| JPH0533278A (en) | Rope comprising carbon fiber-reinforced composite material and production thereof | |
| JP3088061B2 (en) | Fiber reinforced resin composite reinforced material and method for producing the same | |
| JPH02216270A (en) | Structural material and production thereof | |
| JPH03294541A (en) | Hybrid prepreg and production thereof | |
| JPH0323676B2 (en) | ||
| JPH0489346A (en) | Concrete reinforcing member and its production | |
| JPS62288633A (en) | Composite material of continuous carbon fiber and polyolefin resin | |
| JPH02105830A (en) | Production of carbon fibber braid | |
| JPH0480451A (en) | Structural material and its manufacture | |
| KR100345081B1 (en) | Hybrid bar fabric | |
| JPH0333285A (en) | Cable-like composite material and production thereof | |
| JPH07132561A (en) | Preparation of flexible structural material | |
| JP2829762B2 (en) | Manufacturing method of reticulated molded body | |
| JPH032224A (en) | Hybrid prepreg | |
| JPH06168775A (en) | Heater and manufacture thereof | |
| JPH02112454A (en) | Production of braid made of carbon fiber | |
| JP2610154B2 (en) | Manufacturing method of mixed reinforcing material for structural material | |
| JPH0520537B2 (en) | ||
| JP3672684B2 (en) | Continuous rod-shaped molded product intermediate, method for producing the same, molded product and molded method thereof | |
| JP6620255B1 (en) | Prepreg and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090425 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090425 Year of fee payment: 6 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090425 Year of fee payment: 6 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090425 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120425 Year of fee payment: 9 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120425 Year of fee payment: 9 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120425 Year of fee payment: 9 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120425 Year of fee payment: 9 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120425 Year of fee payment: 9 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120425 Year of fee payment: 9 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120425 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130425 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130425 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140425 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term |