KR100855692B1 - Epoxy resin laminating sheet for non-digging repair of drainpipe - Google Patents
Epoxy resin laminating sheet for non-digging repair of drainpipe Download PDFInfo
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- KR100855692B1 KR100855692B1 KR1020070022919A KR20070022919A KR100855692B1 KR 100855692 B1 KR100855692 B1 KR 100855692B1 KR 1020070022919 A KR1020070022919 A KR 1020070022919A KR 20070022919 A KR20070022919 A KR 20070022919A KR 100855692 B1 KR100855692 B1 KR 100855692B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
- B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B13/06—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
- B32B17/04—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments bonded with or embedded in a plastic substance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2363/00—Epoxy resins
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Textile Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
Description
본 발명은 하수관의 비굴착 보수용 에폭시수지 적층시트에 관한 것으로서, 더욱 상세하게는 에폭시 수지층과 함께 스테인레스 스틸망과 수경성 모르타르층을 적층하므로서 경화시에 에폭시 수지층의 물리적인 수축현상이 거의 없어서 하수관 내벽에 대한 접착력이 우수하고, 나아가 내충격성 및 내마모성 등 내구성이 우수한 하수관의 비굴착 보수용 에폭시 수지 적층시트에 관한 것이다.The present invention relates to an epoxy resin laminated sheet for non-excavation repair of sewage pipes, and more particularly, by stacking a stainless steel net and a hydraulic mortar layer together with an epoxy resin layer, there is little physical shrinkage of the epoxy resin layer during curing. The present invention relates to an epoxy resin laminate sheet for non-excavation repair of sewage pipes having excellent adhesion to the inner wall of sewage pipes, and also having excellent durability such as impact resistance and abrasion resistance.
일반적으로 지하에 매설되는 하수관은 시간이 경과 함에 따라 부식 및 균열이 발생하게 되고, 이로 인해 하수관의 물이 밖으로 새어 나가는 누수가 발생하거나, 하수관이 막히는 원인이 되기도 한다. 과거에는 노후된 하수관을 보수 또는 교체하기 위하여 매설지역을 파내는 굴착공법을 주로 실시하였으나, 이러한 방법은 공사기간이 길고 비용지출이 과다하며, 특히 도로를 굴착할 경우 교통체증을 유발하는 원인이 되기도 하였다.In general, sewer pipes buried underground cause corrosion and cracking over time, which may cause leakage of water leaking out of the sewer pipes or blockage of the sewer pipes. In the past, the excavation method of digging the buried area was mainly carried out to repair or replace the old sewage pipe, but this method has a long construction period and excessive expense, and in particular, the excavation of roads can cause traffic jams.
그래서 최근에는 비굴착 부분 보수공법이 개발되어 유용하게 사용되고 있다. 예컨대, 국내 특허공개 제2003-42159호(공개일자; 2003.05.28.)에는 지하에 매설된 하수관의 균열 및 파손 부위를 보수하기 위한 방법에 있어서, 하수관 내의 균열 및 파손 부위를 확인하고 그 주위에 부착된 이물질과 장애물 들을 제거하는 전처리 공정과; 하수관 내부의 균열 및 파손 부위에 부착할 점착성의 수지 원료들이 도포 된 보강 시트를 준비하는 공정과; 상기 시트를 무인 보수기(Packer)의 공압 튜브 주위에 순차적으로 장착하는 공정과; 하수관 내부의 균열 및 파손 부위에 무인 보수기를 위치시키고 상기 튜브에 압축공기를 주입하여 보강 시트를 하수관의 내주면에 부착, 경화시키는 공정과; 상기 튜브에서 압축공기를 배출시켜 무인 보수기를 하수관 내부로부터 철수시키는 공정;을 포함하는 하수관의 보수공법이 소개되어 있다. 이러한 비굴착 보수공법에서 가장 중요한 것은 하수관 내부의 파손 부위에 부착된 보강시트가 박리 또는 이탈되지 않고 장시간 동안 하수관 내부에 밀착되어 있도록 하는 것이다. Therefore, in recent years, a non-excavation part repair method has been developed and used usefully. For example, Korean Patent Publication No. 2003-42159 (published date; May 28, 2003) discloses a method for repairing cracks and broken portions of sewer pipes buried underground. A pretreatment step of removing the adhered foreign matter and obstacles; Preparing a reinforcing sheet coated with adhesive resin raw materials to be attached to cracks and breaks in the sewer pipe; Sequentially mounting the sheet around a pneumatic tube of an unmanned packer; Placing an unmanned repair device at cracks and breakages in the sewer pipe and injecting compressed air into the tube to attach and harden a reinforcing sheet to the inner circumferential surface of the sewer pipe; The process for repairing the sewage pipe is introduced, including a step of evacuating the compressed air from the tube to withdraw the unmanned water conditioner from the inside of the sewer pipe. In the non-excavation repair method, the most important is that the reinforcing sheet attached to the damaged part of the sewer pipe is kept in close contact with the sewer pipe for a long time without peeling or detaching.
이러한 보강시트에 대한 종래기술로서, 예컨대 국내 특허 제566603호(공고일자; 2006.03.31.)에는 (A)비스페놀-A와 에피클로로히드린의 반응 생성물인 비스페놀 A형 에폭시수지 50∼70중량%, 알킬화 페놀 및 포름알데히드로부터 제조된 페놀 노볼락 수지 5∼20중량%, NBR 변성 에폭시 수지 5∼15중량%, 우레탄 변성 에폭시 수지 8∼25중량% 및 폴리글리시딜 에테르 에폭시 수지 7∼15중량%를 포함하는 주제와; (B)지방족 변성 아민 45∼65중량%, 폴리아마이드 30∼50중량% 및 경화촉진제 1∼10중량%를 포함하는 경화제; 로 이루어진 것을 특징으로 하는 상하수관 부분 보 수용 에폭시 수지조성물이 제시되어 있다.As a related art for such a reinforcing sheet, for example, Korean Patent No. 566603 (Announcement Date: 2006.03.31.) Includes 50 to 70% by weight of bisphenol A epoxy resin which is a reaction product of (A) bisphenol-A and epichlorohydrin. , 5 to 20% by weight of phenol novolac resin prepared from alkylated phenol and formaldehyde, 5 to 15% by weight of NBR modified epoxy resin, 8 to 25% by weight of urethane modified epoxy resin and 7 to 15% of polyglycidyl ether epoxy resin A subject comprising%; (B) a curing agent comprising 45 to 65% by weight of an aliphatic modified amine, 30 to 50% by weight of polyamide and 1 to 10% by weight of a curing accelerator; Water and sewage pipe partial receiving water is characterized in that the epoxy resin composition consisting of.
그러나 상기와 같은 에폭시 수지 조성물로 된 보강시트는 경화과정에서 수지물의 체적이 수축하기 때문에 결국 하수관과 보강시트 사이에 미세한 틈새가 발생하게 되고, 이러한 틈새로 인하여 시간이 경과하면 결국 보강시트가 박리 되는 등 내구성이 부족한 문제점이 있었다.However, the reinforcement sheet of the epoxy resin composition as described above, because the volume of the resin shrinks during the curing process, a fine gap is generated between the sewer pipe and the reinforcement sheet, and the reinforcement sheet is eventually peeled off due to the gap. There was a problem such as lack of durability.
이에 본 발명은 무인 보수기를 이용하여 하수관 등 하수관을 비굴착 공법으로 부분 보수함에 있어서, 하수관 내벽에 대한 접착력이 우수하고, 내충격성 및 내구성이 우수한 에폭시수지 적층시트를 제공하는데 그 목적이 있다.Accordingly, an object of the present invention is to provide an epoxy resin laminated sheet having excellent adhesion to the inner wall of the sewage pipe, and excellent impact resistance and durability in partially repairing sewage pipes such as sewage pipes using an unmanned repair machine using a non-excavation method.
상기 목적을 달성하기 위하여 본 발명자는 에폭시 수지층과 함께 물리적으로 이 수지층을 지탱해 주는 스테인레스 스틸망과 수경성 모르타르층을 적층하므로서 본 발명을 완성하게 되었다.In order to achieve the above object, the present inventors have completed the present invention by laminating a stainless steel net and a hydraulic mortar layer which physically support the resin layer together with the epoxy resin layer.
이하, 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.
본 발명에 따른 비굴착 하수관 보수용 에폭시수지 적층시트는 에폭시수지가 함침된 유리섬유층과, 와이어 간격이 20 ~ 30 메쉬인 스테인레스 스틸망과, 수경성 모르타르층과, 와이어 간격이 20 ~ 30 메쉬인 스테인레스 스틸망과, 에폭시수지가 함침된 부직포층이 차례로 적층된 구조로 이루어지고, 전체 두께가 6 ~ 10 mm 인 것을 특징으로 한다.Epoxy resin laminated sheet for repairing unexcavated sewage pipe according to the present invention is a glass fiber layer impregnated with an epoxy resin, a stainless steel mesh having a wire spacing of 20 to 30 mesh, a hydraulic mortar layer, a stainless steel having a wire spacing of 20 to 30 mesh Steel mesh, and the non-woven fabric layer impregnated with an epoxy resin is made of a laminated structure in sequence, characterized in that the total thickness is 6 ~ 10 mm.
이때, 상기 수경성 모르타르층은 시멘트 30 ~ 60 중량부와; 규사 30 ~ 60 중량부와; 비닐아세테이트와 아크릴레이트의 공중합체, 스틸렌과 아크릴레이트의 공중합체, 비닐아세테이트와 비닐에스테르의 공중합체, 비닐아세테이트와 베오바(VeoVa)와 아크릴 에스테르의 공중합체 중에서 선택된 분말수지 1 ~ 10 중량부와; 메틸셀룰로오스계 증점제 0.01 ~ 1 중량부와; 유리섬유 0.01 ~ 5 중량부; 를 포함하는 것을 특징으로 한다.At this time, the hydraulic mortar layer is 30 to 60 parts by weight of cement; 30 to 60 parts by weight of silica sand; 1 to 10 parts by weight of a powdered resin selected from a copolymer of vinyl acetate and acrylate, a copolymer of styrene and acrylate, a copolymer of vinyl acetate and vinyl ester, and a copolymer of vinyl acetate and veo (VeoVa) and acrylic ester ; 0.01 to 1 part by weight of a methyl cellulose thickener; 0.01 to 5 parts by weight of glass fiber; Characterized in that it comprises a.
이하, 본 발명을 좀더 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail.
본 발명에서 에폭시수지가 함침된 유리섬유층은 보수공사가 완료된 후에 하수관 내부로 노출되는 부분으로서, 내화학성, 내수성, 내마모성 등을 제공하는 기능을 한다.In the present invention, the glass fiber layer impregnated with the epoxy resin is a part exposed to the sewer after completion of the repair work, and serves to provide chemical resistance, water resistance, wear resistance, and the like.
상기 유리섬유층 위에 적층되는 스테인레스 스틸망은 직경이 약 0.25 ~ 0.30 mm 인 와이어를 사용하여 간격이 20 ~ 30 메쉬(1 인치 내에 20 ~ 30개의 와이어가 배치되는 망체)의 간격으로 제조된 것을 사용하는 것이 바람직하다. 이때, 상기 와이어의 간격이 20 메쉬 미만이면, 유리섬유층과 수경성 모르타르층이 구조적으로 완전히 분리되어 적층시트의 전체적인 강도가 저하될 우려가 있고, 반대로 30 메쉬 이상이면 스틸망의 강도가 저하되어 좋지 않다.Stainless steel mesh laminated on the glass fiber layer using a wire having a diameter of about 0.25 ~ 0.30 mm with a spacing of 20 to 30 mesh (mesh to which 20 to 30 wires are placed within 1 inch) using It is preferable. At this time, if the spacing of the wire is less than 20 mesh, the glass fiber layer and the hydraulic mortar layer is structurally completely separated, and the overall strength of the laminated sheet may be lowered. .
상기 스테인레스 스틸망 위에는 본 발명의 특징인 수경성 모르타르층이 적층된다. 상기 수경성 모르타르층은 시멘트 30 ~ 60 중량부; 규사 30 ~ 60 중량부; 비닐아세테이트와 아크릴레이트의 공중합체, 스틸렌과 아크릴레이트의 공중합체, 비닐아세테이트와 비닐에스테르의 공중합체, 비닐아세테이트와 베오바(VeoVa)와 아크릴 에스테르의 공중합체 중에서 선택된 분말수지 1 ~ 10 중량부; 메틸셀룰로오스계 증점제 0.01 ~ 1 중량부; 유리섬유 0.01 ~ 5 중량부; 를 포함한다. 여기서 상기 시멘트와 규사는 본 발명의 적층시트를 물리적으로 지지해 주는 기능을 하고, 분말수지는 하수관과 적층시트 사이의 결합력을 향상시켜 주는 기능을 한다. 또한, 증점제는 상하 적층구조 사이의 층간 결합력을 증진시켜 주는 기능을 하고, 유리섬유는 모르타르층의 3차원적 결합력을 향상시켜 주는 기능을 한다. The hydraulic mortar layer, which is a feature of the present invention, is laminated on the stainless steel mesh. The hydraulic mortar layer is 30 to 60 parts by weight of cement; Silica sand 30 to 60 parts by weight; 1 to 10 parts by weight of a powder resin selected from a copolymer of vinyl acetate and acrylate, a copolymer of styrene and acrylate, a copolymer of vinyl acetate and vinyl ester, and a copolymer of vinyl acetate and BeoVa and acrylic ester; 0.01 to 1 part by weight of a methyl cellulose thickener; 0.01 to 5 parts by weight of glass fiber; It includes. Here, the cement and silica sand physically support the laminated sheet of the present invention, the powder resin serves to improve the bonding force between the sewer pipe and the laminated sheet. In addition, the thickener serves to enhance the interlayer bonding force between the upper and lower laminated structure, and the glass fiber serves to improve the three-dimensional bonding force of the mortar layer.
또한, 상기 수경성 모르타르층은 추가적으로 플라이 애쉬, 고로 슬래그 미분말, 실리카 흄, 메타카오린 중에서 선택된 포졸란(pozzolan) 1 ~ 10 중량부와; 폴리카르복실산 화합물, 폴리카르복실산 에테르, 멜라민 술폰산염 포르말린 축합물, 방향족 아미노산 술폰산, 나프탈렌 술폰산염, 폴리알킬아릴 술폰산염, 알킬나프탈렌 술폰산염 중에서 선택된 분산제 0.01 ~ 2 중량부; 를 더 포함할 수도 있다. In addition, the hydraulic mortar layer is additionally 1 to 10 parts by weight of pozzolan (pozzolan) selected from fly ash, blast furnace slag fine powder, silica fume, metakaolin; 0.01 to 2 parts by weight of a dispersant selected from polycarboxylic acid compounds, polycarboxylic acid ethers, melamine sulfonate formalin condensates, aromatic amino acid sulfonic acids, naphthalene sulfonates, polyalkylaryl sulfonates, alkylnaphthalene sulfonates; It may further include.
여기서 포졸란(pozzolan)은 실리카 혼합물로서 그 자체는 수경성이 없으나, 물의 존재하에서 석회와 결합하여 불용성의 실리카질 화합물을 생성시키는 물질로서, 물과 접촉하면 미량의 칼슘(CaO)과 규산(SiO2)이 용출되어 입자의 표면에 불용성의 치밀한 수화물과 함께 비결정질의 실리카 및 알루미나 수화물을 생성한다. 이 와 같은 포졸란의 응결고화 반응은 시멘트의 경화와 본질적으로 동일한 것으로서 상기 시멘트의 기능을 보강해 주는 역할을 한다. 또한, 상기 분산제는 본 발명의 적층시트를 하수관 내벽에 밀착하는 과정에서 모르타르층이 유동성을 갖게 하는 기능을 한다.The pozzolan (pozzolan) is itself has not a hydraulic, a substance that in combination with the lime produce a siliceous compound insoluble in the presence of water, on contact with water, a trace amount of calcium (CaO) and silica (SiO 2) as the silica mixture This elutes to form amorphous silica and alumina hydrates with insoluble dense hydrates on the surface of the particles. This solidification reaction of pozzolanic is essentially the same as the hardening of the cement serves to reinforce the function of the cement. In addition, the dispersant has a function of making the mortar layer fluidity in the process of adhering the laminated sheet of the present invention to the inner wall of the sewer pipe.
다음으로 상기 모르타르층 위에는 다시 스테인레스 스틸망이 적층된다. 이때, 스테인레스 스틸망은 와이어의 직경이 약 0.25 ~ 0.30 mm 이고, 와이어의 간격이 20 ~ 30 메쉬(1 인치 내에 20 ~ 30개의 와이어가 배치되는 망체)인 것을 사용하는 것이 바람직하다. Next, the stainless steel mesh is further laminated on the mortar layer. In this case, it is preferable to use a stainless steel mesh having a wire diameter of about 0.25 to 0.30 mm and a wire spacing of 20 to 30 mesh (a mesh in which 20 to 30 wires are disposed within 1 inch).
마지막으로 상기 스테인레스 스틸망 위에는 에폭시 수지가 함침된 부직포층이 적층된다. 상기 부직포층은 하수관 내벽에 밀착되는 부분으로서, 본 발명의 적층시트를 하수관 내벽에 단단히 부착해 주는 기능을 한다.Finally, the nonwoven fabric layer impregnated with an epoxy resin is laminated on the stainless steel mesh. The nonwoven fabric layer is a part in close contact with the inner wall of the sewer pipe, and functions to firmly attach the laminated sheet of the present invention to the inner wall of the sewer pipe.
본 발명의 에폭시수지 적층시트는 전체 두께가 6 ~ 10 mm 로 되도록 구성하는 것이 바람직하다. 만일 상기 두께가 6 mm 이하이면 적층시트의 물리적 강도가 취약하게 될 우려가 있고, 반대로 10 mm 이상이면 두께 증가에 따른 상승효과는 나타나지 않고 하수관의 내경만 좁히게 되어 좋지 않다.The epoxy resin laminated sheet of the present invention is preferably configured so that the total thickness is 6 ~ 10 mm. If the thickness is 6 mm or less, there is a possibility that the physical strength of the laminated sheet is vulnerable. On the contrary, if the thickness is 10 mm or more, a synergistic effect due to an increase in thickness does not appear and only the inner diameter of the sewer pipe is narrowed.
본 발명의 적층시트를 사용하여 하수관을 보수하기 위해서는 에폭시 수지가 열경화성 수지이기 때문에 무인 보수기(Packer)의 튜브 내부에 끓는 물을 주입하여 그 물의 온도에 의해서 에폭시 수지를 경화시키는 것이 바람직하다. 이때, 물의 온도가 70 ~ 90 ℃ 일 때, 경화 온도는 약 2시간 정도이면 충분하다. 또한 본 발명의 적층시트는 직경이 250 ~ 800 mm인 하수관 내부를 부분 보수하는데 매우 적합하다.In order to repair the sewage pipe using the laminated sheet of the present invention, since the epoxy resin is a thermosetting resin, it is preferable to inject boiling water into the tube of the unmanned water packer and to cure the epoxy resin by the temperature of the water. At this time, when water temperature is 70-90 degreeC, hardening temperature is enough for about 2 hours. In addition, the laminated sheet of the present invention is very suitable for partial repair of the inside of the sewer pipe having a diameter of 250 ~ 800 mm.
이상 본 발명에 대한 바람직한 실시예를 설명하였으나, 본 발명의 권리범위가가 상기 실시예로 한정되는 것은 아니다. 당업자가 예컨대 상기 모르타르층의 일부 성분을 다른 성분으로 대체하거나, 양쪽 스테인레스 스틸망 중 어느 하나를 생략하는 등 회피설계를 시도할 수도 있을 것이다. 그러나 이러한 설계 변경으로 인해 본 발명에서 전혀 예견하지 못한 전혀 새로운 작용 및 효과가 나타나지 않는 한 본 발명의 권리범위에 속하는 것으로 해석되어야 한다.Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited to the above embodiment. Those skilled in the art may attempt to avoid the design, for example, by replacing some components of the mortar layer with other components, or omitting any one of both stainless steel meshes. However, it should be construed that it falls within the scope of the present invention, unless such design changes result in no new actions and effects that were not foreseen in the present invention.
본 발명의 적층시트는 상기 스테인레스 스틸망이 상하에서 에폭시 수지가 함침된 유리섬유층과 부직포층을 지탱해 주는 상태에서 그 가운데 적층된 수경성 모르타르층이 물리적으로 단단히 받쳐주기 때문에 경화시에 에폭시 수지층의 체적이 수축할 우려가 없고, 동시에 하수관 내벽에 대한 접착력이 우수하며, 나아가 내충격성 및 내마모성 등 내구성이 우수한 수지 적층시트를 형성할 수 있는 효과가 있다.In the laminated sheet of the present invention, the stainless steel mesh supports the glass fiber layer and the nonwoven fabric layer impregnated with the epoxy resin in the upper and lower sides, and the hydraulic mortar layer laminated therein physically firmly supports the epoxy resin layer at the time of curing. There is no fear of shrinkage of the volume, and at the same time, it is excellent in adhesion to the inner wall of the sewer pipe, and furthermore, there is an effect of forming a resin laminated sheet having excellent durability such as impact resistance and abrasion resistance.
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