JPH0392331A - Lining material - Google Patents
Lining materialInfo
- Publication number
- JPH0392331A JPH0392331A JP22936589A JP22936589A JPH0392331A JP H0392331 A JPH0392331 A JP H0392331A JP 22936589 A JP22936589 A JP 22936589A JP 22936589 A JP22936589 A JP 22936589A JP H0392331 A JPH0392331 A JP H0392331A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- resin
- lining material
- existing pipe
- shape memory
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 79
- 229920005989 resin Polymers 0.000 claims abstract description 91
- 239000011347 resin Substances 0.000 claims abstract description 91
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 6
- 239000002759 woven fabric Substances 0.000 claims description 27
- 238000000465 moulding Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 abstract description 18
- 239000012530 fluid Substances 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 239000004744 fabric Substances 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 description 19
- 229920003002 synthetic resin Polymers 0.000 description 15
- 239000000057 synthetic resin Substances 0.000 description 15
- 239000007788 liquid Substances 0.000 description 9
- 239000011521 glass Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 101100046503 Symbiobacterium thermophilum (strain T / IAM 14863) tnaA1 gene Proteins 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000636 poly(norbornene) polymer Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、下水道や上水道．送油管その他あらゆる既
設配管内面にライニングすることができ）る内張り材、
特に厚さの均一性と密着性の向上に関するものである．
［従来の技術］
近年、下水道や上水道等の既設管の強度補強や防食対策
．漏水・浸水対策あるいは流量改善などを目的として、
既設管内面に合成樹脂をライニングしたり、既設管内面
に合成樹脂を形成する反転ライニング工法が脚光を浴び
ている．
例えば、特公昭５５−４３８９０号公報，特開昭６４−
８５７３８号公報に開示された工法は、二一ドルフエル
ト層にエボキシ．ポリエステル等の液状熱硬化性樹脂を
含浸した内張り材を既設管内で流体圧力により反転．進
行させ５反転した内張り材を流体圧力によって既設管内
面に圧着し、熱硬化性樹脂を硬化させて既設管内面に合
成樹脂をライニングする方法である．
また、特開昭６４−１６６３３号公報，特開昭６４−１
６６３４号公報あるいは特開昭６３−２８５３９５号公
報に開示された工法は、小口径の熱可塑性プラスチック
管を既設管内に挿入した後、熱可塑性プラスチック管を
内部より加熱加圧して膨張させ、既設管内面に密着させ
る方法である．
［発明が解決しようとする課題］
特公昭５５−４３８９０公報に代表される従来の反転工
法に使用する内張り材は既設管内で反転するときに反転
面の押圧力によって柔軟な内張り材に不均一な伸びが生
じる．また、二一ドルフエルト層に含浸した液状熱硬化
性樹脂も反転時に反転面の不均一な押圧力によってフエ
ルト層内を移動する．このためフエルト層の厚さと断面
方向の樹脂含漫量に差が生じ、形成された合成樹脂管の
厚さが一定にならず、強度のバラツキが生じるという短
所があった．
また，特に長尺の内張り材を使用する場合には、液状樹
脂を含浸した柔軟な内張り材を保管するために含浸過程
後巻き取ったり折り重ねる必要がある．このとき内張り
材の各部分に自重ないし押圧力の差によって厚みのバラ
ツキが生じ、液状樹脂に環境圧力差が加えられる．この
ような状態の内張り材で合成樹脂管を形成するとやはり
厚みのバラツキ，強度のパラツキが生じる．また、液状
樹脂を柔軟バック全長に亙って均一に含浸するのは非常
に困難であり、通常±１５％のバラツキが生じて、均一
な合成樹脂管を形成することが困難であった．
また、既設管に技管の継手部のズレ，ハズレ，クラック
等の空隙がある場合、反転後の既設管の押圧力によって
、これら空隙周囲の液状樹脂が空隙内に浸み出して空隙
周囲の強度が低下するほか、液状樹脂が加熱によるゲル
化まえの粘度低下により地下浸入水と共に流出してしま
い、ボーラスな含浸層となって強度が著しく低下すると
いう短所もあった。[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to sewerage and water supply. Lining material that can be used to line the inner surface of oil pipes and other existing pipes,
In particular, it concerns the improvement of thickness uniformity and adhesion. [Conventional technology] In recent years, strength reinforcement and anti-corrosion measures have been developed for existing pipes such as sewerage and waterworks. For the purpose of water leakage/flooding countermeasures or flow improvement, etc.
Inversion lining methods that line the inner surface of existing pipes with synthetic resin or form synthetic resin on the inner surface of existing pipes are attracting attention. For example, Japanese Patent Publication No. 55-43890, Japanese Patent Publication No. 64-
The method disclosed in Japanese Patent No. 85738 is to apply epoxy to the 21 Dorfelt layer. Lining material impregnated with liquid thermosetting resin such as polyester is inverted inside existing pipes using fluid pressure. In this method, the lining material, which has been advanced and reversed five times, is pressed onto the inner surface of the existing pipe using fluid pressure, the thermosetting resin is cured, and the inner surface of the existing pipe is lined with synthetic resin. Also, JP-A-64-16633, JP-A-64-1
The method disclosed in Publication No. 6634 or Japanese Unexamined Patent Publication No. 63-285395 involves inserting a small-diameter thermoplastic pipe into an existing pipe, and then heating and pressurizing the thermoplastic pipe from the inside to expand it. This is a method of making it stick to the surface. [Problems to be Solved by the Invention] When the lining material used in the conventional inversion construction method as typified by Japanese Patent Publication No. 55-43890 is inverted within an existing pipe, the pressing force of the inverted surface causes unevenness in the flexible lining material. Elongation occurs. Furthermore, the liquid thermosetting resin impregnated into the 21-dolph felt layer also moves within the felt layer due to the uneven pressing force of the inverted surface during inversion. For this reason, there is a difference in the thickness of the felt layer and the amount of resin content in the cross-sectional direction, and the thickness of the formed synthetic resin pipe is not constant, resulting in variations in strength. In addition, especially when using long lining materials, it is necessary to roll or fold the flexible lining material impregnated with liquid resin after the impregnation process in order to store it. At this time, variations in thickness occur in each part of the lining material due to its own weight or differences in pressing force, and environmental pressure differences are applied to the liquid resin. If a synthetic resin pipe is formed using lining material in this condition, variations in thickness and strength will occur. Furthermore, it is very difficult to uniformly impregnate the entire length of the flexible bag with liquid resin, and there is usually a variation of ±15%, making it difficult to form a uniform synthetic resin tube. Additionally, if there are gaps in the existing pipe due to misalignment, loss, cracks, etc. at the joint of the technical pipe, the liquid resin around these gaps will seep into the gap due to the pressing force of the existing pipe after it is turned over. In addition to a decrease in strength, there was also the disadvantage that the viscosity of the liquid resin decreased before gelation due to heating, causing it to flow out together with underground water, forming a bolus impregnated layer and significantly decreasing strength.
また、熱硬化性樹脂を含浸した内張り材は反転後、加熱
硬化して成形するが、加熱硬化のときの加熱時間及び冷
却時間の合計時間は例えば径が３００！Ｉｌ１ ．厚さ
６ｍ＋＋の内張り材にポリエステル樹脂使用した場合で
約１５時間を要する。また、エボキシ樹脂の速乾タイプ
でも約６〜８時間かかり、作業時間が長くなるという短
所がある．これは長い加熱保持期間の間に既設管や周囲
土壌に蓄熱され、冷却速度がゆるやかになることにも起
因する．
また、熱硬化性樹脂の加熱硬化のときにライニング層の
長手方向と円周方向に収縮が発生する．この収縮により
既設管とライニング層との間に隙間が生じ、侵入水や漏
水の原因になるという短所ちあった．
また、特開昭６４−１６６３３号公報，特開昭６４−１
６６３４号公報あるいは特開昭６３−２８５３９５号公
報に開示された工法のように、既設管径より小断面形状
に加工した熱可塑性樹脂管を加熱・軟化・拡管するには
、樹脂温度差による同一圧力下の伸び率差が大きく、ま
た加熱すると不定形状態となり、自己膨張力もないので
外圧で強制的に伸長・拡管せねばならない．このため既
設管内と樹脂管内の円周方向、長手方向いずれの部分で
も同一圧力下で均一に加熱する必要がある．しかし、実
際は加熱温度がバラツキ、樹脂管の伸びに変動が生じて
樹脂管にシワが発生したり、管厚にパラツキを生ずるほ
か、既設管との間に空隙を生じるという短所があった。In addition, the lining material impregnated with thermosetting resin is heated and cured after being turned over and molded, but the total time of heating time and cooling time during heat curing is, for example, 300 mm in diameter! Il1. It takes about 15 hours when polyester resin is used for the 6m++ thick lining material. In addition, even the quick-drying type of epoxy resin takes about 6 to 8 hours, so it has the disadvantage of increasing the working time. This is also due to the fact that heat is accumulated in the existing pipes and the surrounding soil during the long heating retention period, which slows down the cooling rate. Furthermore, when the thermosetting resin is heated and cured, shrinkage occurs in the longitudinal direction and circumferential direction of the lining layer. This shrinkage creates a gap between the existing pipe and the lining layer, which has the disadvantage of causing water intrusion or leakage. Also, JP-A-64-16633, JP-A-64-1
In order to heat, soften, and expand a thermoplastic resin pipe that has been processed into a smaller cross-sectional shape than the existing pipe diameter, as in the construction method disclosed in Publication No. 6634 or Japanese Unexamined Patent Publication No. 63-285395, it is necessary to The difference in elongation rate under pressure is large, and when heated, it becomes amorphous and has no self-expansion power, so it must be forcibly elongated and expanded using external pressure. For this reason, it is necessary to uniformly heat both the circumferential and longitudinal parts of the existing pipe and the resin pipe under the same pressure. However, in reality, the heating temperature varies, the elongation of the resin tube varies, causing wrinkles in the resin tube, uneven tube thickness, and gaps between the tube and the existing tube.
また、特開昭６３ − ２．！１５３９５号公報に示す
ように、曲管内面外側で軟化したパイプを小口径からビ
グで強制的５伸ばし圧着すると、軟化状態において収縮
性がないため外側が他の部分に比べ管厚が薄くなると共
に５内側では伸長された部分が進行方向下流側でシワに
なるという短所があった．この発明は係る短所を解決す
るためになされたものであり、伸びを極力抑えて確実に
既設管内面にライニングすることができる内張り材を得
ることを目的とするものである．
［課題を解決するための手段］
この発明に係る内張り材は、既設管の内径より大きい外
径で形状記憶樹脂により形成された樹脂パイプからなる
内張り材であって、形状記憶樹脂の成形温度より高い温
度の軟化点を有し、軸方向と円周方向に沿って織られた
直交織の強化繊維からなる円筒織布を形状記憶樹脂と一
体に形成して樹脂パイプを形成し、形成された樹脂パイ
プを形状記憶ＦＭ脂の形状回復温度以上で形状記憶湿度
以下の加熱雰囲気内で軟化して断面積を小さくして形成
したことを特徴とする。Also, JP-A-63-2. ! As shown in Publication No. 15395, when a pipe that has been softened on the outside of the inner surface of a curved pipe is forcibly stretched and crimped with a large diameter pipe from a small diameter, the outside part becomes thinner than other parts because there is no shrinkage in the softened state. 5 The inner side had the disadvantage that the stretched part would wrinkle on the downstream side in the direction of travel. This invention was made in order to solve these disadvantages, and the object is to obtain a lining material that can be reliably lined on the inner surface of existing pipes while suppressing elongation as much as possible. [Means for Solving the Problems] The lining material according to the present invention is a lining material made of a resin pipe made of shape memory resin and having an outer diameter larger than the inner diameter of the existing pipe, and which has a temperature higher than the molding temperature of the shape memory resin. A resin pipe is formed by integrally forming a cylindrical woven fabric made of orthogonally woven reinforcing fibers with a shape memory resin, which has a high softening point and is woven along the axial and circumferential directions. It is characterized in that the resin pipe is softened in a heated atmosphere at a temperature higher than the shape recovery temperature of the shape memory FM resin and lower than the shape memory humidity to reduce the cross-sectional area.
［作用］
この発明においては形状記憶樹脂と直交織の強化繊維か
らなる円筒織布を一体に形成して、既設管の内径より大
きい外径の樹脂パイプを形成し、この樹脂パイプを形状
記憶樹脂の形状回復温度から形状記憶温度以内の温度範
囲で軟化させて断崩積を小さくして内張り材を形成する
。この内張り材を既設管内に索引・挿入あるいは加熱加
圧流体で軟化させて反転・進行させた後、元の樹脂パイ
プの形状に回復させる．この樹脂パイプは既設管の内径
より大きく形成されているから、形状を回復したときに
既設管内面に完全に密着する．また、内張り材が形状記
憶樹脂と直交織の強化＃ａ雄からなる円筒織布として一
体に形成することにより形状記憶樹脂の機械的強度を円
筒織布で補強するから、内張り材を既設管内に索引・挿
入するとき、あるいは形状回復温度から形状記憶温度の
範囲で軟化状態（ゴム状領域）にして既設管内に反転・
進行させるときに、内張り材の引張強度，弾性率を向上
させて内張り材の伸びを抑える．
［実施例］
第１図はこの発明の一実施例に係る内張り材１の加工工
程を示す工程図である。第１図（ａ）において、２は形
状記憶ＦＭＷｒｉからなり既設管の内径に対して例えば
１００〜１２０％の外径を有する樹脂パイプ、３は樹脂
パイブ２の内面に設けられた円筒織布である．
樹脂パイブ２を形成する形状記憶樹脂は、形状記憶温度
以上の成形時に形成された形状が記憶され、その形状を
変形させても形状回復温度以上で形状記憶温度以下の加
熱雰囲気内で軟化状態にすると、変形前の元の形状に回
復する樹脂であり、例えばボリスチレンと結晶化ポリブ
タジエンのブロック共重体（旭化成工業製）やトランス
ボリイソブレン（クラレ製）．ポリウレタン（三菱重工
業製）あるいはポリノルボルネン（日本ゼオン製）及び
これらの改質品２誘導品からなる．そして、この形状記
憶樹脂は従来の硬質塩化ビニール管を形成する場合と同
様に押出成形可能な樹脂である。[Function] In this invention, a cylindrical woven fabric made of shape memory resin and orthogonally woven reinforcing fibers is integrally formed to form a resin pipe with an outer diameter larger than the inner diameter of the existing pipe, and this resin pipe is made of shape memory resin. The lining material is formed by softening in a temperature range from the shape recovery temperature to the shape memory temperature to reduce fracture collapse. This lining material is indexed and inserted into the existing pipe, or it is softened with heated and pressurized fluid, reversed and advanced, and then restored to the original shape of the resin pipe. Since this resin pipe is formed to have a larger inner diameter than the existing pipe, it completely adheres to the inner surface of the existing pipe when its shape is restored. In addition, since the lining material is integrally formed as a cylindrical woven fabric made of shape memory resin and reinforced #a male orthogonal weave, the mechanical strength of the shape memory resin is reinforced by the cylindrical woven fabric, so the lining material can be placed inside the existing pipe. When indexing and inserting, or inverting and inserting into the existing pipe in a softened state (rubber-like region) in the range from shape recovery temperature to shape memory temperature.
When advancing, the tensile strength and elastic modulus of the lining material are improved to suppress elongation of the lining material. [Example] FIG. 1 is a process diagram showing the processing steps of a lining material 1 according to an example of the present invention. In FIG. 1(a), 2 is a resin pipe made of shape memory FMWri and has an outer diameter of, for example, 100 to 120% of the inner diameter of the existing pipe, and 3 is a cylindrical woven fabric provided on the inner surface of the resin pipe 2. be. The shape memory resin forming the resin pipe 2 memorizes the shape formed during molding at a temperature higher than the shape memory temperature, and even if the shape is deformed, it remains in a softened state in a heated atmosphere at a temperature higher than the shape recovery temperature and lower than the shape memory temperature. When this occurs, the resin recovers to its original shape before deformation, such as block copolymers of polystyrene and crystallized polybutadiene (manufactured by Asahi Kasei Industries) and transpolyisobrene (manufactured by Kuraray). It consists of polyurethane (manufactured by Mitsubishi Heavy Industries) or polynorbornene (manufactured by Nippon Zeon) and two modified derivatives of these products. This shape memory resin is a resin that can be extruded as in the case of forming conventional hard vinyl chloride pipes.
また、円筒織布３は樹脂パイプ２を形成する形状記憶樹
脂の成形温度より高い温度、例えば２［１［）０Ｃ以上
の軟化点を有する炭素繊維系．ガラス繊維系．ふっ素系
．アラミド系．ポリエステル系．ナイロン系等からなり
、引張強さ（ｇ／デニール）があり比較的伸び率の小さ
い強化繊維からなる。The cylindrical woven fabric 3 is made of a carbon fiber material having a softening point higher than the molding temperature of the shape memory resin forming the resin pipe 2, for example, 2[1[)0C or higher. Glass fiber type. Fluorine-based. Aramid type. Polyester type. It is made of nylon-based reinforcing fibers that have high tensile strength (g/denier) and relatively low elongation.
この強化繊維を円形織機（例えば（株）鳥居鉄工所製）
を利用して軸方向と円周方向に沿って直交平織に織るか
，あるいは例えば縦，横の密度（本／２５ｍｍ）がそれ
ぞれ２０〜３０本程度の平織のガラスクロスを軸方向に
縫製して円筒織布３を形成する。This reinforcing fiber is passed through a circular loom (for example, manufactured by Torii Iron Works Co., Ltd.).
Or, for example, by sewing plain weave glass cloth in the axial direction with a density of about 20 to 30 fibers (strands/25 mm) each in the vertical and horizontal directions. A cylindrical woven fabric 3 is formed.
この円筒織布３を、例えば第２図に示すようなマンドレ
ル４とダイ５の間に引き込みながら、形状記憶温度、例
えば１２０°Ｃ以上の温度で軟化しリング７から供給す
る冷却空気により冷却することにより、第１図（ａ）に
示すような円筒織布３と一体化した樹脂パイブ２を形成
する．次に、このように円筒織布３と一体化された樹脂
パイプ２を形状記憶樹脂の廂状回復温度（ゴム化温度）
例えば９０’Ｃ以上から形状記憶温度の加熱雰囲気内で
軟化させながら、成型ローラや押出しスリット等の機械
的方法により、断面積が既設管の断面積より小さくなる
ように扁平にして第１図（ｂ）に示すような扁平樹脂パ
イブ２と扁平円筒織布３からなる内張り材ｌを形成し、
この内張り材ｌの軟化状態を保持して、そのままかある
いは先端に索引ローブを取付けて円形巻きか又は折りた
たんでから形状回復温度以下に冷却して硬化させ保管す
る．
次に、上記のようにして形成された内張り材ｌを使用し
て既設管内面に合成樹脂管を形成する場合の動作を第３
図の断面図を参照して説明する．まず、内張り材ｌの先
端に耐熱フィルムホースｌＯを接合し、この耐熱フィル
ムホースｌＯの先端部を加熱保温槽１ｌの内張り材取出
口１２から引き出した状態で、第３図に示すように索引
ローブ１３と共に巻き取った内張り材１を加熱保温槽１
． ｌに収納する．この加熱保温槽１１を既設管ｌ４に
近接して配置した反転圧力容器１５に隣接した状態で設
置し、加熱保温槽１１の内張り材取出口ｌ２を反転圧力
容器ｌ５の内張り材挿入口１６に固定する．この状態で
加熱保温槽１ｌの加熱流体供給ロエ７から熱風．蒸気等
の加熱流体ｌ８を供給し、上部のベンチュレータ１９か
ら排出しながら、加熱保温槽１１内を内張り材ｌを構成
する樹脂パイプ２ａの形状回復温度から形状記憶温度の
温度範囲に保持して、内張り材１を軟化状態にする．
次に、内張り材ｌの先端に接合した耐熱フィルムホース
１． Ｏの先端を反転圧力容器ｌ５から引き出し、内面
が外側になるように反転して反転圧力容器１５の内張り
材引出口２０にスチールバンド２ｌで固定する。耐熱フ
ィルムホースｌＯの先端を反転固定した後、反転圧力容
器ｌ５の流体供給口２２から樹脂パイブ１ａの形状回復
温度から形状記憶温度の温度を有する推進加熱流体２３
を連続供給する．この推進加熱流体２３の供給により耐
熱フィルムホース１０の反転部１０ａが進行し、加熱保
温［１１内で軟化している内張ク材ｌを内張り材挿入口
ｌ２を通して反転圧力容器Ｌ５内に引き出して内張り材
１を反転させる．反転圧力容器ｌ５内に推進加熱流体２
３を供給するにしたがって内張り材ｌの反転部が既設管
１４内に挿入され、反転部内外の圧力差により既設管１
４内を進行する．この反転部が既設管１４内を進行する
際、反転前の内張り材ｌは、その形状回復圧力が金属系
形状記憶材と比べて小さく、かつ推進加熱流体２３の圧
力により両面から押圧されているため、膨張．拡大する
ことなしに進行する。また、内張り材ｌの反転部はゴム
弾性体になっており、さらに反転後は内張り材ｌを構成
する樹脂パイプＩａの形状回復力が働くので容易に推進
加熱流体２３の圧力は反転部が進行する程度の圧力、例
えば既設管ｌ４が２５０〜３００＋ａｍ口怪管の場合で
０． ２Ｋｇｆ／ｃｍ”程度の極めて低い圧力で良い．
また、推進加熱流体２３の圧力が低い圧力ですむととも
に、内張り材ｌの伸びが軸方向と円周方向に対してそれ
ぞれ平行に織られた円筒織布３で抑制されているから、
内張り材ｌの伸びによる変形を防止し均一な厚さで内張
り材ｌを反転することができる．
なお、反転圧力容器ｌ５の内部に設けた矯正板２４は内
張り材挿入口１２から引き出された反転前の扁平な内張
り材１を保持することにより、内張ク材Ｌの反転部が既
設管ｌ４内を進行するときに、反転前後の内張’） Ｎ
Ｉが接触してＦ！Ｊ擦抵抗が生じることを防止してい
る．
このようにして既設管Ｉ４の内面に内張ク材ｌを反転・
進行させると、形状回復温度以上で軟化している内張り
材ｌの外面が既設管ｌ４の内面にｍ 自＋ｈ Ｉ
． ａ）一）ｒｊｊ ＦＭ ｎ ｔナ
１ ｎ）０コ ’Ｅ＋ ＋ｗ ｌ＋ ’ｔｆｔ
：４ｔ ｔ＋ｎ Ｍ ｈ １４−２３の圧力が
作用しているため、内張り材ｌを構成する樹脂パイプ２
の形状回復力と推進加熱流体２３の圧力との相互作用が
働き、既設管ｌ４の内の空気や水を排除しながら内張り
材ｌを接看剤なしで既設管１４内面に密着させる．
既設管１４の中間にまで反転部が進行すると内張り材ｌ
の終端部に取り付けられている索引ローブｌ３が反転圧
力容器ｌ５内に引出され、以後反転部は索引ローブｌ３
の張力により支持される。While this cylindrical woven fabric 3 is drawn between a mandrel 4 and a die 5 as shown in FIG. As a result, a resin pipe 2 integrated with a cylindrical woven fabric 3 as shown in FIG. 1(a) is formed. Next, the resin pipe 2 integrated with the cylindrical woven fabric 3 is heated to the shape memory resin's rib recovery temperature (rubberization temperature).
For example, while softening in a heated atmosphere at a shape memory temperature of 90'C or higher, it is flattened using a mechanical method such as a forming roller or an extrusion slit so that the cross-sectional area is smaller than that of the existing pipe (see Figure 1). Forming a lining material l consisting of a flat resin pipe 2 and a flat cylindrical woven fabric 3 as shown in b),
This lining material 1 is maintained in its softened state and is stored as it is, or after it is rolled or folded into a circle with an index lobe attached to its tip, it is cooled to a temperature below its shape recovery temperature and hardened. Next, the operation when forming a synthetic resin pipe on the inner surface of an existing pipe using the lining material l formed as described above is explained in the third section.
This will be explained with reference to the cross-sectional view in the figure. First, a heat-resistant film hose 10 is joined to the tip of the lining material 1, and with the tip of the heat-resistant film hose 10 pulled out from the lining material outlet 12 of the heating insulation tank 1l, as shown in FIG. The lining material 1 rolled up together with 13 is heated in the heat-insulating tank 1
．． Store it in l. This heating and heat-insulating tank 11 is installed adjacent to the inverted pressure vessel 15 placed close to the existing pipe l4, and the lining material outlet l2 of the heating and heat-insulating tank 11 is fixed to the lining material insertion port 16 of the inverted pressure vessel l5. do. In this state, hot air is supplied from the heated fluid supply loe 7 of the heating and heat-insulating tank 1L. While supplying a heating fluid l8 such as steam and discharging it from an upper venturator 19, the inside of the heating and heat-insulating tank 11 is maintained in a temperature range from the shape recovery temperature of the resin pipe 2a constituting the lining material l to the shape memory temperature, Bring the lining material 1 into a softened state. Next, the heat-resistant film hose 1. is attached to the tip of the lining material 1. The tip of the O is pulled out from the inverted pressure vessel 15, inverted so that the inner surface faces outside, and fixed to the lining material outlet 20 of the inverted pressure vessel 15 with a steel band 2l. After the tip of the heat-resistant film hose IO is inverted and fixed, a propulsion heating fluid 23 having a temperature from the shape recovery temperature to the shape memory temperature of the resin pipe 1a is supplied from the fluid supply port 22 of the inversion pressure vessel 15.
Continuously supply. By supplying this propelling heating fluid 23, the reversing part 10a of the heat-resistant film hose 10 advances, and the lining material l softened in the heating and heat-insulating [11] is pulled out into the reversing pressure vessel L5 through the lining material insertion port 12. Flip the lining material 1. Propelling heating fluid 2 in inverted pressure vessel l5
3, the inverted part of the lining material l is inserted into the existing pipe 14, and due to the pressure difference between the inside and outside of the inverted part, the existing pipe 1
Proceed within 4. When this inversion section advances within the existing pipe 14, the lining material l before inversion has a smaller shape recovery pressure than the metal shape memory material, and is pressed from both sides by the pressure of the propelling heating fluid 23. Therefore, it expands. Proceed without expansion. In addition, the inverted part of the lining material l is made of a rubber elastic body, and furthermore, after being inverted, the shape recovery force of the resin pipe Ia constituting the lining material l acts, so that the pressure of the propelling heating fluid 23 is easily reduced until the inverted part advances. For example, if the existing pipe 14 is a 250 to 300 + am mouth pipe, the pressure is 0. An extremely low pressure of about 2 Kgf/cm" is sufficient. In addition, the pressure of the propulsion heating fluid 23 can be low, and the lining material 1 is a cylindrical woven fabric whose elongation is woven parallel to the axial direction and the circumferential direction. Because it is suppressed by 3,
It is possible to prevent the lining material l from deforming due to elongation and to invert the lining material l to a uniform thickness. Note that the straightening plate 24 provided inside the inverted pressure vessel l5 holds the flat lining material 1 pulled out from the lining material insertion port 12 before being inverted, so that the inverted portion of the lining material L is aligned with the existing pipe l4. When proceeding inside, the lining before and after reversal') N
I contacted F! J This prevents friction resistance from occurring. In this way, the lining material l is inverted on the inner surface of the existing pipe I4.
As it progresses, the outer surface of the lining material l, which has softened above the shape recovery temperature, will be exposed to the inner surface of the existing pipe l4.
．． a) 1) rjj FM n tna
1 n) 0 'E+ +w l+ 'tft
:4t t+n M h 14-23 pressure is acting on the resin pipe 2 that constitutes the lining material l.
The interaction between the shape recovery force of 1 and the pressure of the propelling heating fluid 23 works, and the lining material 1 is brought into close contact with the inner surface of the existing pipe 14 without any adhesive while excluding air and water inside the existing pipe 14. When the inverted part advances to the middle of the existing pipe 14, the lining material l
The indexing lobe l3 attached to the terminal end of the index lobe l3 is pulled out into the inverting pressure vessel l5, and thereafter the inverting section is attached to the indexing lobe l3
is supported by the tension of
そして、反転部が既設管ｌ４の終端部まで進行した後、
樹脂パイプ２ａの形状回復温度以下まで自然冷却するか
、冷気．冷水等の冷却流体を供給して強制冷却して、内
張り材ｌを硬化させて、既設管１４内に合成樹脂管を形
成し、その後形成された合成Ｗｔ４Ｗ８管の両端を切断
して既設管ｌ４内に自立した合成樹脂管を完成する。Then, after the reversal section advances to the terminal end of the existing pipe l4,
Naturally cool the resin pipe 2a to below the shape recovery temperature, or cool it with cold air. A cooling fluid such as cold water is supplied for forced cooling to harden the lining material l to form a synthetic resin pipe within the existing pipe 14, and then both ends of the formed synthetic Wt4W8 pipe are cut to form the existing pipe l4. Completed a self-supporting synthetic resin pipe inside.
このように円筒織布３とｌ！１脂パイプ２とを一体化し
た内張ク材１により既設管１内に合成ＦＭ脂管時に内張
り材ｌの厚さの変動が少なくなり、均一な厚さの合成樹
脂管を形成することができる．例えば形状記憶樹脂とし
て形状回復温度３５°（のボリノルボルネンを使用した
場合、この樹脂判体が温度５０°Ｃで軟化してゴム状領
域になっ］いるときの機械的特性は、破断強度０．６〜
０，Ｋｇｆ／ｍｍ”，伸び率４００％以上であり、２３
６Ｃの常温で硬化しているときの引張破断侶度は３．Ｏ
Ｋ ｇ ｆ ／ｍｍ”である。この形状記憶摺脂を密
度が縦．横共に３０本／ ２ ５ ｍ ｍ ，質１８
２ ｇ ／ ｍ ’のガラスクロスで一体化して強化１
ると、樹脂が形状回復温度以上で軟化していても、ガラ
スクロク自体の強度に近い特性すなわち引張破断強度２
０Ｋｇ／ｍｍ”，伸び率４〜８λになる．したがって、
反転・進行時の内張り材ｌの伸びを大幅に聞えることが
できる．
なお、上記実施例においては内張り材ｌを既設管１４内
に反転・進行させる場合について説明したが、内張り材
工を反転させずに既設管１４内に索引・挿入する場合に
おいても上記実施例と同様な作用を奏することができる
．
すなわち、既設管ｌ４内に内張り材ｌを索引・挿入する
場合、内張ク材１に引張り力が作用するが、内張り材１
の樹脂パイプ２が軸方向と円周方向に対してそれぞれ平
行に織られた直交平織の円筒織布３と一体に形成されて
いるため、この円筒織布３により内張り材ｌの伸びが抑
えられ、厚さが変化することなしに既設管１４内に挿入
することができる．
また、上記実施例は樹脂パイプ２の内面に円筒織布３を
一体化した場合について説明したが、樹脂バイプ２の素
管を円筒織布３にはめ合せた後、熱間押出加工により樹
脂パイプ２と円筒織布３を接合させて、第４図に示すよ
うに樹脂パイブ２の外面に円筒織布３を一体化して扁平
にした場合、第５図に示すように樹脂バイプ２の内外面
にそれぞれ円ｒｆｉ織布３を一体化した場合、あるいは
第６図に示すように樹脂パイプ２の中間層として円筒織
布３を設けた場合も上記実施例と同様な作用を）奏する
ととができる．
さらに、第７図に示すようにマンドレル通過後の形状記
憶温度以上で軟化状態にある樹脂バイプ２の外面に直交
手織基調のガラスクロステーブ３ａに張力を加えながら
螺旋巻きして食い込み接看し、その後冷却リング７を通
して冷却空気や冷却水を放出して硬化することにより樹
脂パイブ２とガラスクロステーブ３ａを一体化して、ガ
ラスクロステーブ３ａで樹脂パイプ２の伸びを抑えるこ
ともできる．
なお、ガラスク口ステーブ３ａを巻き付けるときに圧着
ローラ８を併用することにより表面粗度を平滑化するこ
とができる．
［発明の効果コ
この発明は以上説明したように、形状記憶樹脂と直交織
の強化ｔａ維からなる円筒織布を一体に形成して、既設
管の内径より大きい外径のＦＭ脂パイプを形成し、この
樹脂パイプを形状記憶樹脂の形状回復温度から形状記憶
温度以内の温度範囲で軟化させて断面積を小さくして形
成した内張り材をか再試ｑ！ｆ内グ安引．通人ふスいＬ
寸加社加『述沫ア軟化させて反転・進行させた後、元の
樹脂パイプの形状に回復させる．この樹脂パイプは既設
管の内径より大きく形成されているから、形状を回復す
るときの形状回復力と加圧流体の圧力との相互作用が樹
脂パイプに働き、樹脂パイプを接着剤なしで完全に既設
管内面に密着させことができ、接着剤や液状樹脂等の加
熱・硬化時の収縮により既設管との間に生じる隙間の発
生を防止して、浸入水や漏水の原因を除去することがで
きる．また、樹脂パイプを正確な管厚に成形後、扁平加
工等を行ない固体状態で保管・運搬するので、保管時の
厚みや強度のバラッキがなくなるとともに、内張り材が
形状記憶樹脂と直交織の強化繊維からなる円筒織布と一
体に形成されているため、形状記憶樹脂の機械的強度を
円筒織布で補強することができル．
また、内張り材を既設管内に索引・挿入するとき、ある
いは形状回復温度から形状記憶温度の範囲で軟化状態（
ゴム状領域）にして既設管内に反杯＋：住鐸古拌スレキ
Ｌψ 巾担ｒｔｔナ出？１２１冶廖 田性率を向上させ
て内張り材の伸びを抑えることができるから、既設管内
に均一管厚、均一強度の合成樹脂管を形成することがで
きる．
また、内張り材が形状記憶樹脂と直交織の強化Ｉｌｌ維
からなる円筒織布と一体に形成されているため、既設管
内に形成された合成樹脂管の引張強度１弾性率を高める
ことができるから、合成樹脂管の品質面で著しい向上を
図ることができる．また、樹脂パイプは軟化時に既設管
に密肴するから、曲管の部分でもシワを少なくすること
ができる．
また、接着剤や液状樹脂等を使わずに樹脂パイプを既設
管に密着させることができるから、接着剤等の硬化時間
を必要としないとともに、既設管は簡単な下地処理です
むから、施工時間を短縮することができる．
さらに、接着剤等の付着装置も不要であるから、既設管
との連結部が小型ですみ、下水管のマンホールからでも
施工することができ、施工費の低減を図ることができる
．
また、軟化した内張り材を加圧流体の圧力で既設管内に
反転・進行させてから形状回復させて合成樹脂管を形成
するから、屈曲管内にもその形状に合った合成樹脂管を
容易に形成することができる．In this way, cylindrical woven fabric 3 and l! 1 The lining material 1 that is integrated with the resin pipe 2 reduces the variation in the thickness of the lining material 1 when synthetic FM resin pipe is installed in the existing pipe 1, making it possible to form a synthetic resin pipe with a uniform thickness. can. For example, the mechanical properties when the shape memory resin has a shape recovery temperature of 35° (if borinorbornene is used, the resin body softens at a temperature of 50°C and becomes a rubber-like region) are the breaking strength of 0. 6～
0.Kgf/mm”, elongation rate is 400% or more, 23
The tensile strength at 6C when cured at room temperature is 3. O
K g f /mm''.The density of this shape memory resin is 30 pieces/25 mm in length and width, quality 18.
Integrated and reinforced with 2 g/m' glass cloth 1
Therefore, even if the resin has softened above its shape recovery temperature, it has properties close to the strength of the glass cloth itself, that is, tensile strength at break of 2.
0Kg/mm", elongation rate is 4-8λ. Therefore,
You can hear the significant elongation of the lining material during reversal and advancement. In addition, in the above embodiment, the case where the lining material l is reversed and advanced into the existing pipe 14 has been explained, but the above embodiment also applies when the lining material l is indexed and inserted into the existing pipe 14 without reversing it. It can have a similar effect. That is, when indexing and inserting the lining material 1 into the existing pipe 14, a tensile force acts on the lining material 1;
Since the resin pipe 2 is formed integrally with a cylindrical woven fabric 3 of orthogonal plain weave woven parallel to the axial direction and the circumferential direction, the elongation of the lining material l is suppressed by this cylindrical woven fabric 3. , it can be inserted into the existing pipe 14 without changing its thickness. Further, in the above embodiment, the cylindrical woven fabric 3 is integrated with the inner surface of the resin pipe 2, but after fitting the base tube of the resin pipe 2 to the cylindrical woven fabric 3, the resin pipe is formed by hot extrusion processing. 2 and the cylindrical woven fabric 3 are joined together, and the cylindrical woven fabric 3 is integrated with the outer surface of the resin pipe 2 to make it flat as shown in FIG. 4. As shown in FIG. When a circular RFI woven fabric 3 is integrated into each, or when a cylindrical woven fabric 3 is provided as an intermediate layer of the resin pipe 2 as shown in FIG. 6, the same effect as in the above embodiment can be obtained. can. Furthermore, as shown in FIG. 7, the outer surface of the resin pipe 2, which has been softened at a temperature higher than the shape memory temperature after passing through the mandrel, is spirally wound while applying tension to the glass cloth tape 3a having an orthogonal hand-woven pattern, so that it bites into contact with the outer surface of the resin pipe 2. Thereafter, the resin pipe 2 and the glass cross-stave 3a can be integrated by curing by releasing cooling air or water through the cooling ring 7, and the elongation of the resin pipe 2 can be suppressed by the glass cross-stave 3a. Incidentally, the surface roughness can be smoothed by using the pressure roller 8 together when winding the glass cutout stave 3a. [Effects of the Invention] As explained above, this invention integrally forms a cylindrical woven fabric made of shape memory resin and orthogonally woven reinforced TA fibers to form an FM fat pipe with an outer diameter larger than the inner diameter of the existing pipe. However, we tried again with a lining material made by softening this resin pipe in a temperature range from the shape recovery temperature of the shape memory resin to the shape memory temperature to reduce the cross-sectional area! F discount. Passionist Fusui L
``After softening the resin, inverting it and advancing it, it restores the original shape of the resin pipe.'' Since this resin pipe is formed to have a larger inner diameter than the existing pipe, the interaction between the shape recovery force and the pressure of the pressurized fluid acts on the resin pipe, allowing the resin pipe to be completely fixed without adhesive. It can be attached closely to the inner surface of existing pipes, preventing gaps from forming between the pipe and the existing pipe due to shrinkage when adhesives and liquid resins are heated and hardened, and eliminates the causes of water intrusion and water leakage. can. In addition, after molding the resin pipe to an accurate pipe thickness, it is flattened and stored and transported in a solid state, eliminating variations in thickness and strength during storage. Since it is formed integrally with a cylindrical woven fabric made of fibers, the mechanical strength of the shape memory resin can be reinforced by the cylindrical woven fabric. In addition, when indexing or inserting the lining material into an existing pipe, or when the lining material is in a softened state (
Rubber-like area) and anti-cup+ in the existing pipe: Shutaku old stirring thread Lψ width carrier rtt na out? Since it is possible to improve the elasticity and suppress the elongation of the lining material, it is possible to form synthetic resin pipes with uniform thickness and uniform strength within existing pipes. In addition, since the lining material is integrally formed with a cylindrical woven fabric made of shape memory resin and orthogonally woven reinforced Ill fibers, it is possible to increase the tensile strength and elastic modulus of the synthetic resin pipe formed inside the existing pipe. , it is possible to significantly improve the quality of synthetic resin pipes. In addition, since resin pipes are tightly attached to existing pipes when softened, wrinkles can be reduced even in curved pipes. In addition, since resin pipes can be attached tightly to existing pipes without using adhesives or liquid resin, there is no need for hardening time for adhesives, etc., and the existing pipes require only simple surface preparation, which reduces construction time. can be shortened. Furthermore, since there is no need for an adhesive or other adhesive device, the connecting part to the existing pipe can be small, and it can be installed even through the manhole of a sewer pipe, reducing construction costs. In addition, the softened lining material is reversed and advanced into the existing pipe using the pressure of pressurized fluid, and then the shape is restored to form a synthetic resin pipe, making it easy to form a synthetic resin pipe that matches the shape of the bent pipe. can do.
第１図はこの発明の実施例に係る内張り材の加工工程を
示す工程図、第２図は上記内張り材の加工状態を示す断
面図、第３図は上記内張り材による施工動作を示す断面
図、第４図．第５図．第６図及び第７図はそれぞれ他の
実施例を示す斜視図である．
ｌ・・内張り材、２・・樹脂パイプ、３・・円筒織布、
３ａ・・ガラスクロステーブ、１４・・既設管．FIG. 1 is a process diagram showing the processing steps of the lining material according to an embodiment of the present invention, FIG. 2 is a sectional view showing the processing state of the lining material, and FIG. 3 is a sectional view showing the construction operation using the lining material. , Fig. 4. Figure 5. 6 and 7 are perspective views showing other embodiments, respectively. l... Lining material, 2... Resin pipe, 3... Cylindrical woven fabric,
3a...Glass cloth stave, 14...Existing pipe.
Claims (1)
された樹脂パイプからなる内張り材であって、 形状記憶樹脂の成形温度より高い温度の軟化点を有し、
軸方向と円周方向に沿って織られた直交織の強化繊維か
らなる円筒織布を形状記憶樹脂と一体に形成して樹脂パ
イプを形成し、 形成された樹脂パイプを形状記憶樹脂の形状回復温度以
上で形状記憶温度以下の加熱雰囲気内で軟化して断面積
を小さくして形成したことを特徴とする内張り材。[Scope of Claims] A lining material made of a resin pipe made of shape memory resin with an outer diameter larger than the inner diameter of the existing pipe, which has a softening point higher than the molding temperature of the shape memory resin,
A cylindrical woven fabric made of orthogonally woven reinforcing fibers woven along the axial and circumferential directions is integrally formed with shape memory resin to form a resin pipe, and the formed resin pipe is restored to the shape of the shape memory resin. A lining material characterized in that it is formed by softening in a heated atmosphere at a temperature above the temperature and below the shape memory temperature to reduce the cross-sectional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22936589A JPH0392331A (en) | 1989-09-06 | 1989-09-06 | Lining material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22936589A JPH0392331A (en) | 1989-09-06 | 1989-09-06 | Lining material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0392331A true JPH0392331A (en) | 1991-04-17 |
Family
ID=16891027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22936589A Pending JPH0392331A (en) | 1989-09-06 | 1989-09-06 | Lining material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0392331A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006046974A3 (en) * | 2004-06-04 | 2006-10-19 | Cornerstone Res Group Inc | Method of making and using shape memory polymer composite patches |
| US7717648B2 (en) | 2004-09-16 | 2010-05-18 | Kanaflex Corporation | Method for repairing drainage pipe |
| US8122520B2 (en) | 2009-03-16 | 2012-02-28 | Jaco Athletics, Llc | Lower-body garment having a secure waist assembly |
| JP2014008929A (en) * | 2012-07-02 | 2014-01-20 | Sakase Adtec Kk | Extension structure |
| JP2016098924A (en) * | 2014-11-25 | 2016-05-30 | 芦森工業株式会社 | Pipe passage and its lining method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6227134A (en) * | 1985-07-30 | 1987-02-05 | Furukawa Electric Co Ltd:The | Thermorestoring tube for covering inside of pipe |
| JPS63256424A (en) * | 1987-04-13 | 1988-10-24 | Kubota Ltd | Revival process of pipe |
-
1989
- 1989-09-06 JP JP22936589A patent/JPH0392331A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6227134A (en) * | 1985-07-30 | 1987-02-05 | Furukawa Electric Co Ltd:The | Thermorestoring tube for covering inside of pipe |
| JPS63256424A (en) * | 1987-04-13 | 1988-10-24 | Kubota Ltd | Revival process of pipe |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006046974A3 (en) * | 2004-06-04 | 2006-10-19 | Cornerstone Res Group Inc | Method of making and using shape memory polymer composite patches |
| US7938923B2 (en) * | 2004-06-04 | 2011-05-10 | Cornerstone Research Group, Inc. | Method of making and using shape memory polymer composite patches |
| US7717648B2 (en) | 2004-09-16 | 2010-05-18 | Kanaflex Corporation | Method for repairing drainage pipe |
| US8122520B2 (en) | 2009-03-16 | 2012-02-28 | Jaco Athletics, Llc | Lower-body garment having a secure waist assembly |
| JP2014008929A (en) * | 2012-07-02 | 2014-01-20 | Sakase Adtec Kk | Extension structure |
| JP2016098924A (en) * | 2014-11-25 | 2016-05-30 | 芦森工業株式会社 | Pipe passage and its lining method |
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