JPH02239922A - Resin processing method - Google Patents
Resin processing methodInfo
- Publication number
- JPH02239922A JPH02239922A JP1060741A JP6074189A JPH02239922A JP H02239922 A JPH02239922 A JP H02239922A JP 1060741 A JP1060741 A JP 1060741A JP 6074189 A JP6074189 A JP 6074189A JP H02239922 A JPH02239922 A JP H02239922A
- Authority
- JP
- Japan
- Prior art keywords
- clip
- resin
- held
- prepreg
- hardening resin
- 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.)
- Granted
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 43
- 239000011347 resin Substances 0.000 title claims abstract description 43
- 238000003672 processing method Methods 0.000 title claims description 3
- 238000000034 method Methods 0.000 claims description 10
- 210000005069 ears Anatomy 0.000 claims description 9
- 239000000835 fiber Substances 0.000 abstract description 23
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 4
- 239000002759 woven fabric Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、硬化性樹脂を含浸硬化したシート状繊維構造
物の製造法に関する。さらに詳細には、未硬化の硬化性
樹脂を含浸したシート状繊維構造物を幅方向に引張りな
がら硬化する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing a sheet-like fibrous structure impregnated with a curable resin and cured. More specifically, the present invention relates to a method of curing a sheet-like fibrous structure impregnated with an uncured curable resin while pulling it in the width direction.
シート状繊維構造物の樹脂加工では、繊維構造物を液状
樹脂、樹脂溶液あるいは、樹脂エマルジョン中に浸漬含
浸する又はコーティングした後、適宜絞液し、幅出しを
しながら、乾燥及び又は硬化させる方法が一般に行なわ
れている。In resin processing of sheet-like fibrous structures, the fibrous structures are immersed or coated in liquid resin, resin solution, or resin emulsion, and then squeezed as appropriate and dried and/or hardened while tentering. is commonly practiced.
その際、幅出しのためにテンターが用いられる。At that time, a tenter is used for tentering.
テンターは、エンドレスチェーンにクリップもしくはピ
ンを具え、これで繊維構造物の両耳を保持し、チェーン
が進む時に繊維構造物の幅方向に弓張って所定の幅とす
るものであり、織物の幅出しやヒートセットに広く利用
されている。A tenter is an endless chain equipped with clips or pins that hold both ends of the textile structure, and as the chain advances, it arches in the width direction of the textile structure to create a predetermined width. Widely used for serving and heat setting.
しかしながら、未硬化の硬化性樹脂を多量に浸漬により
全体に含浸した繊維構造体をテンターにて幅出ししなが
ら、樹脂を硬化させようとする場合には、該硬化性樹脂
が硬化時にクリップもしくはピンと固着して離れ難くな
る為、繊維構造体を破ったり、さらに、クリップ、ピン
あるいはチェーン、レールを破損する危険があった。However, when attempting to cure a fiber structure that has been entirely impregnated with a large amount of uncured curable resin by dipping it in a tenter, the curable resin may not hold clips or pins during curing. Since it would stick and be difficult to separate, there was a risk of tearing the fiber structure and further damaging the clip, pin, chain, or rail.
あるいは、硬化性樹脂をコーティングによって施与する
場合には、ナイフコーターの長さを繊維構造物の幅より
短くして、繊維構造物の耳部には樹脂を付着させないよ
うにすることが可能ではある。するとしかし、繊維構造
物が目の詰んだ重布である場合には、コーティングによ
って樹脂を繊維間に十分に含浸させることが困難であり
、一方、目の粗い織物の場合には、ナイフコーター及び
それに対向する板の個所で織物の目ズレが発生しやすい
。Alternatively, if the curable resin is applied by coating, it is possible to make the length of the knife coater shorter than the width of the fiber structure so that the resin does not adhere to the ears of the fiber structure. be. However, if the fiber structure is a dense, heavy fabric, it is difficult to sufficiently impregnate the resin between the fibers by coating, while in the case of a coarse fabric, knife coaters and Misalignment of the weave of the fabric is likely to occur on the opposite plate.
これへの対策の一つとしてテンターのクリップ又はピン
に離型剤を塗る方法が考えられるが、運転中に離型剤は
徐々に除去され、一旦離型剤が無くなると問題が生じる
。クリップ又はピンをフッ素樹脂、シリコーン樹脂等で
加工することも考えられるが、クリップ又はピンの摩擦
係数が小さくなるので、繊維構造物を幅方向に強く引張
ることができなくなる。One possible solution to this problem is to apply a release agent to the clips or pins of the tenter, but the release agent is gradually removed during operation, and once the release agent is gone, a problem occurs. Although it is conceivable to process the clip or pin with fluororesin, silicone resin, etc., the coefficient of friction of the clip or pin becomes small, making it impossible to strongly pull the fiber structure in the width direction.
本発明は、硬化性樹脂を含浸したシート状繊維構造物を
幅出ししながら、樹脂を硬化する方法において、該繊維
構造物の両耳部を把持する前に予め把持部分の樹脂を硬
化せしめる事を特徴とする加工方法である。The present invention is a method of curing a sheet-like fiber structure impregnated with a curable resin while width-setting the resin. This processing method is characterized by:
本発明方法は、硬化性樹脂を多量に含浸硬化した繊維構
造物の製造において特にその効果を発揮する。そのよう
な硬化性樹脂の量は、繊維構造物に対してたとえば２０
〜３００重量％、好ましくは３０〜２００重量％である
。The method of the present invention is particularly effective in producing fiber structures impregnated with a large amount of curable resin and cured. The amount of such curable resin is, for example, 20
-300% by weight, preferably 30-200% by weight.
本発明にあいて硬化性樹脂としては、たとえばエポキシ
樹脂、ウレタン樹脂、フェノール樹脂、不飽和ポリエス
テル樹脂及びポリイミド樹脂、紫外線硬化樹脂、放躬線
硬化樹脂が挙げられる。In the present invention, examples of curable resins include epoxy resins, urethane resins, phenol resins, unsaturated polyester resins and polyimide resins, ultraviolet curable resins, and radiation curable resins.
本発明において、テンターのクリップ又はピンで把持さ
れる繊維構造物部分の樹脂のみを予め硬化するには、硬
化手段を把持部分のみに施せばよい。たとえば繊維構造
物の把持部分と非把持部分く中央部分）の間に遮へい板
を置き、把持部分に赤外線、遠赤外線、紫外線又は熱風
をあてる方法、あるいは把持部分のみに熱板をあてる方
法などがあるが、これに限定されない。把持部分の樹脂
の硬化の程度は、接着性が無くなれば十分であり、いわ
ゆるＣステージの硬化で十分である。完全に硬化しても
かまわない。把持部分の幅は、使用する装置により異る
ことができるが、一般にテンターにおいては０．５〜３
ｃｍ程度である。In the present invention, in order to pre-cure only the resin of the fiber structure portion held by the clips or pins of the tenter, the curing means may be applied only to the gripped portion. For example, there is a method in which a shielding plate is placed between the gripped part of the fiber structure and the non-gridded part (center part), and the gripped part is exposed to infrared rays, far infrared rays, ultraviolet rays, or hot air, or a hot plate is applied only to the gripped part. Yes, but not limited to this. As for the degree of curing of the resin in the gripping portion, it is sufficient that the adhesiveness disappears, and so-called C-stage curing is sufficient. It does not matter if it is completely cured. The width of the gripping part can vary depending on the device used, but in general, the width of the gripping part is 0.5 to 3
It is about cm.
このように予め把持部分の樹脂を硬化させた後に、繊維
構造物を把持し、中央部分又は全体に硬化手段を施す。After curing the resin in the gripping portion in advance in this manner, the fiber structure is gripped and a curing means is applied to the central portion or the entirety.
これには慣用の加熱炉付きテンターを用いることが好ま
しい。従って、上記の把持部分の樹脂の硬化は、繊維構
造物がテンターに入る前段階において連続的に行われる
ことが好ましい。For this purpose, it is preferable to use a conventional tenter equipped with a heating furnace. Therefore, it is preferable that the curing of the resin in the gripping portion is performed continuously before the fiber structure enters the tenter.
本発明に供せられるシート状繊維構造体は、織物、編物
、不織布、紙等のシート状の形態を有するものであれば
良く、目の空いたメッシュ状のものでも良い。本発明は
また、耳組織の無い織物あるいは繊維間の接着力の弱い
不織布及び紙に対して有効である。従来の方法では、耳
部の糸又は繊維がほつれたり破れたりしてしまう場合に
も、本発明に従い把持部を予め強化する事によりテンタ
ーでの幅出し加工が可能となる。本発明方法が特に好ま
しく適用できる繊維構造物は、繊維強化成形体に用いら
れる繊維構造物である。このような繊維構造物は好まし
くは網状構造体、特に絡み織物である（特開昭６３ −
２２６３６号公報）。これは、経糸及び緯糸の密度が
１〜１０本／２５＃と粗いが、緯糸が絡んでいるので交
点拘束が強い網状である。The sheet-like fibrous structure used in the present invention may be any sheet-like material such as woven fabric, knitted fabric, non-woven fabric, paper, etc., and may be a mesh-like structure with open mesh. The present invention is also effective for fabrics without selvedge tissue, nonwoven fabrics and papers with weak adhesion between fibers. Even if the threads or fibers of the selvage part fray or tear in the conventional method, by strengthening the grip part in advance according to the present invention, it is possible to perform tentering processing using a tenter. A fibrous structure to which the method of the present invention can be particularly preferably applied is a fibrous structure used for a fiber-reinforced molded article. Such fibrous structures are preferably net-like structures, especially entwined fabrics (Japanese Patent Application Laid-Open No. 1986-63-
22636). This has a rough warp and weft density of 1 to 10 yarns/25#, but since the weft yarns are entwined, it has a net shape with strong intersection restriction.
硬化性樹脂は、織物に対して通常３０〜２００重吊％付
与される。このように多量の樹脂を付与された網状物を
、そのままテンターのクリップ又はピンで把持して硬化
工程へ送ると、樹脂がクリップ又はピンに固着して大き
なトラブルが生じやすい。The curable resin is usually applied in an amount of 30 to 200% by weight to the fabric. If such a net-like material to which a large amount of resin has been applied is held as it is with the clips or pins of a tenter and sent to the curing process, the resin tends to stick to the clips or pins, causing a big problem.
本発明方法によれば、トラブルは起らない。According to the method of the present invention, no trouble occurs.
本発明により、硬化性樹脂を多量に含浸した繊維構造体
をテンター加工しながら樹脂硬化する事が可能となった
。クリップあるいはピンにより両耳部を把持し幅出しし
ながら硬化する事により繊維構造体の幅方向の収縮を抑
制コントロール可能となり、凹凸がなく平らなシート状
繊維複合体とする事ができる。According to the present invention, it has become possible to cure a fiber structure impregnated with a large amount of curable resin while performing tenter processing. By holding both ears with clips or pins and curing while adjusting the width, shrinkage in the width direction of the fiber structure can be suppressed and controlled, and a flat sheet-like fiber composite with no unevenness can be obtained.
繊維構造物として、ポリアクリロニトリル系炭素繊維糸
の絡み織物ＣＦ６４０１（鐘紡株式会社、目付２１８ｇ
／ ｒｄ、糸密度７．５＃メッシュ）を用イタ。As a fiber structure, polyacrylonitrile-based carbon fiber yarn entwined fabric CF6401 (Kanebo Co., Ltd., basis weight 218 g
/rd, thread density 7.5#mesh).
下記組成の樹脂溶液に絡み織物を連続的に浸漬させ、１
２０゜Ｃの熱風で５分間乾燥してプリプレグを得た。樹
脂の量は、全重量に対して４１％であった。１５０゜Ｃ
でのゲル化時間は、１分３２秒であった。Continuously immerse the entwined fabric in a resin solution with the following composition, 1
A prepreg was obtained by drying with hot air at 20°C for 5 minutes. The amount of resin was 41% based on the total weight. 150°C
The gelation time was 1 minute and 32 seconds.
ビスフェノールＡ型エポキシ樹脂 １００部（ＧＹ
−２６０，ヂバガイギー社製）
ジシアンジアミド １０部イミダ
ゾール型促進剤 ２部（キュアゾー
ル２Ｐ４｝ＩＨＺ，四国化成株式会社）溶剤（メヂルセ
ロソルブ）１２０部
〔比較例１〕
先ず比較の為、上記プリプレグをクリップテンターにか
け、緯方向に幅出ししながら加熱炉中で１６０℃で４分
間、続いて１８０゜Ｃで４分間硬化し、炉出口にてクリ
ップを開いて硬化シートを取り出そうとした。しかし、
クリップと織物とがエポキシ樹脂にて強固に接着してい
る為、クリップを連続して自動的に外す事は出来ず、連
続加工は不可能であった。そこで、強引にひきはがした
後に、織物の状態を観察したところ、織物耳部の経糸が
ほつれていた。クリップの把持する位置が場所によって
異なる為経糸の蛇行が見られた。Bisphenol A type epoxy resin 100 parts (GY
-260, manufactured by Ziba Geigy) 10 parts of dicyandiamide 2 parts of imidazole type accelerator (Curesol 2P4} IHZ, Shikoku Kasei Co., Ltd.) 120 parts of solvent (Medyl Cellosolve) [Comparative Example 1] First, for comparison, the above prepreg was put in a clip tenter, The sheet was cured in a heating oven at 160° C. for 4 minutes and then at 180° C. for 4 minutes while tentering in the weft direction, and the clip was opened at the exit of the oven to take out the cured sheet. but,
Since the clip and the fabric are firmly bonded with epoxy resin, the clip cannot be continuously and automatically removed, making continuous processing impossible. After forcibly tearing off the fabric, we observed the condition of the fabric and found that the warp threads at the edges of the fabric were frayed. Meandering of the warp threads was observed because the gripping position of the clip differed depending on the location.
〔実施例′１〕
クリップとの接着を防ぐ為、クリップで把持する前に遠
赤外線ランプにてプリプレグの両耳部両面より遠赤外線
を照射した。使用したランプは東芝製ＩＲＳ ２２０（
２０００Ｗ， ２００Ｖ，長さ１４６０． ）である
。[Example '1] In order to prevent adhesion to the clip, far-infrared rays were irradiated from both sides of both ears of the prepreg using a far-infrared lamp before gripping with the clip. The lamp used was Toshiba IRS 220 (
2000W, 200V, length 1460. ).
第１図に装置の概略を示す。図は、左右対称な装置の右
側部分をプリプレグの進行方向から見た立面図である。Figure 1 shows an outline of the apparatus. The figure is an elevational view of the right side of the symmetrical device viewed from the prepreg advancing direction.
図中のランプ１，２はブリプレグ３の右端部を夫々上下
より８０ｍの距離で照射する。Lamps 1 and 2 in the figure illuminate the right end of the Bripreg 3 at a distance of 80 m from above and below, respectively.
遮へい板４．５は、織物の耳端部より１５ｍ以上の個所
を被って、樹脂の硬化を防ぐ。ランプ１，２の裏側には
、反射板６，７を設けた。２ｍ／分の速度でランプの間
を通した後、クリップにて両耳部を把持し、比較例１と
同様に幅出ししながら硬化した。その結果、加熱炉出口
でのクリップとの接着は全くなく、スムーズに連続加工
する事が可能であった。又、耳部の経糸がずれる事もな
く、耳部より一定の位置を把持する事が出来るため、経
糸の蛇行がなくなり、又凹凸がなく平らなメッシュ状繊
維構造体が得られた。The shielding plate 4.5 covers a region of 15 m or more from the edge of the fabric to prevent the resin from hardening. Reflection plates 6 and 7 were provided on the back sides of the lamps 1 and 2. After passing between lamps at a speed of 2 m/min, both ears were held with clips and cured while adjusting the width in the same manner as in Comparative Example 1. As a result, there was no adhesion to the clip at the exit of the heating furnace, and smooth continuous processing was possible. Furthermore, since the warp yarns in the ear portion could be held at a fixed position from the ear portion without shifting, meandering of the warp yarns was eliminated, and a flat mesh-like fiber structure without unevenness was obtained.
〔実施例２〕
実施例１の遠赤外線ランプの代わりに、熱風加熱炉を両
耳部に設け、両耳端部より１５ｍの間のみ熱風をあて、
１８０℃×１分間加熱硬化するほかは、実施例１と同様
にテンターにて加工した。その結果は、実施例１と同様
であった。[Example 2] Instead of the far-infrared lamps in Example 1, hot air heating furnaces were installed at both ears, and hot air was applied only to a distance of 15 m from the ends of both ears.
It was processed using a tenter in the same manner as in Example 1, except that it was cured by heating at 180° C. for 1 minute. The results were similar to Example 1.
（実施例３）
ガラスクロス７６２８ （鐘紡株式会社製、目付２０５
ｇ／ＴＩｔ）を、不飽和ポリエステル樹脂リゴラツク１
５０ＨＲ（昭和高分子株式会社）１００部及びペンゾイ
ルパーオキザイド粉末１部から成る樹脂液中に浸漬し、
絞液し、樹脂固形分として４０ｗｔ％の含浸量とした。(Example 3) Glass cloth 7628 (manufactured by Kanebo Co., Ltd., fabric weight 205
g/TIt), unsaturated polyester resin Rigorakku 1
Immersed in a resin solution consisting of 100 parts of 50HR (Showa Kobunshi Co., Ltd.) and 1 part of penzoyl peroxide powder,
The liquid was squeezed to obtain an impregnated amount of 40 wt% as resin solid content.
続いて両耳部１０＃のみを１４０゜Ｃで１分間加熱硬化
した後、クリップにて両耳を把持して幅出ししながら１
１０℃で４分間、続けて１３０℃で４分間加熱硬化した
。その結果、クリップに樹脂が接着する事なく、連続加
工する事ができ、凹凸のない平らなシートが得られた。Next, after heating and hardening only both ears 10# at 140°C for 1 minute, hold both ears with clips and adjust the width of each ear.
It was heated and cured at 10°C for 4 minutes and then at 130°C for 4 minutes. As a result, continuous processing was possible without the resin adhering to the clip, and a flat sheet with no irregularities was obtained.
〔比較例２〕
■部を前もって加熱しないほかは、実施例３と同様にテ
ンター加工を行なったところ比較例１ほどの固着力はな
いものの、クリップとシートの接着が発生し、連続加工
は不可能であった。[Comparative Example 2] Tenter processing was carried out in the same manner as in Example 3, except that part (1) was not heated in advance.Although the adhesion was not as strong as in Comparative Example 1, adhesion between the clip and the sheet occurred, and continuous processing was not possible. It was possible.
本発明により、硬化性樹脂を含浸したシート状繊維構造
物を幅出ししながら、樹脂を硬化する事が可能となった
。According to the present invention, it has become possible to cure the resin while extending the width of a sheet-like fiber structure impregnated with a curable resin.
第１図は、耳部加熱装置の断面図を示す。 FIG. 1 shows a cross-sectional view of the ear heating device.
Claims (1)
ながら、樹脂を硬化する方法において、該繊維構造物の
両耳部を把持する前に予め把持部分の樹脂を硬化せしめ
る事を特徴とする加工方法。A method of curing a sheet-like fibrous structure impregnated with a curable resin while widening the width of the resin, the method is characterized in that the resin at the gripped portion is hardened in advance before gripping both ears of the fibrous structure. Processing method.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1060741A JPH02239922A (en) | 1989-03-15 | 1989-03-15 | Resin processing method |
| US07/490,400 US5110656A (en) | 1989-03-15 | 1990-03-08 | Impregnated leno fabric and reinforced inorganic matrix article |
| EP19900200608 EP0387968B1 (en) | 1989-03-15 | 1990-03-14 | Network article, a process for the preparation thereof and a shaped inorganic article reinforced therewith |
| DE1990602071 DE69002071T2 (en) | 1989-03-15 | 1990-03-14 | Lattice fabric, process for its manufacture and shaped inorganic object reinforced with it. |
| US07/846,517 US5244693A (en) | 1989-03-15 | 1992-03-04 | Process for the preparation of a network article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1060741A JPH02239922A (en) | 1989-03-15 | 1989-03-15 | Resin processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02239922A true JPH02239922A (en) | 1990-09-21 |
| JPH0560781B2 JPH0560781B2 (en) | 1993-09-03 |
Family
ID=13150990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1060741A Granted JPH02239922A (en) | 1989-03-15 | 1989-03-15 | Resin processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02239922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2003027414A1 (en) * | 2001-09-25 | 2005-01-06 | 構造品質保証研究所株式会社 | Structure reinforcement structure, reinforcement method, base isolation structure, base isolation method, reinforcement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0367612A (en) * | 1989-08-08 | 1991-03-22 | Kumagai Gumi Co Ltd | Method of cooling aggregate |
-
1989
- 1989-03-15 JP JP1060741A patent/JPH02239922A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0367612A (en) * | 1989-08-08 | 1991-03-22 | Kumagai Gumi Co Ltd | Method of cooling aggregate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2003027414A1 (en) * | 2001-09-25 | 2005-01-06 | 構造品質保証研究所株式会社 | Structure reinforcement structure, reinforcement method, base isolation structure, base isolation method, reinforcement |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0560781B2 (en) | 1993-09-03 |
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