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KR101436194B1 - Flexible second gas barrier and method for fabricating the same - Google Patents

Flexible second gas barrier and method for fabricating the same Download PDF

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KR101436194B1
KR101436194B1 KR1020110116099A KR20110116099A KR101436194B1 KR 101436194 B1 KR101436194 B1 KR 101436194B1 KR 1020110116099 A KR1020110116099 A KR 1020110116099A KR 20110116099 A KR20110116099 A KR 20110116099A KR 101436194 B1 KR101436194 B1 KR 101436194B1
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aluminum foil
adhesive sheet
treatment
urethane adhesive
gas barrier
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KR20130050837A (en
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김정철
김민규
김경한
김문기
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주식회사 한국카본
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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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • 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
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/06—Coating on the layer surface on metal layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • 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
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

본 발명은 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 및 이의 제조방법를 제시한다. 본 발명에 따른 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어는 양쪽 면에 물리적 접착력 향상을 위해 크로메이트, 플라즈마, 코로나 중 어느 하나로 처리한 후, 우레탄 수지와의 화학적 상용성이 우수한 폴리아미드/실란화합물 표면처리를 한 알루미늄 호일과, 상기 알루미늄 호일의 양쪽 면에 보강재가 부착되어 일체로 구성되도록 하여, 접착강도를 향상시키고 기계적 물성이 강화되는 효과가 있으며, 보강재에 우레탄 탄성체를 접착시트로 사용하여 열적 안정성 확보와 인장강도를 향상시킬 수 있는 매우 유용한 효과가 있다.The present invention provides a secondary gas barrier for a liquefied gas storage tank having flexibility and a method of manufacturing the same. The secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention may be prepared by treating the surface of either of the surfaces with either of a chromate, a plasma or a corona in order to improve the physical adhesion, An aluminum foil having a surface treated with a silane compound and a reinforcing material adhered to both sides of the aluminum foil so as to be integrally formed to improve the bonding strength and to enhance the mechanical properties and to use the urethane elastic body as the adhesive sheet Thereby providing a very useful effect of securing thermal stability and improving tensile strength.

Description

가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 및 이의 제조방법{Flexible second gas barrier and method for fabricating the same}TECHNICAL FIELD [0001] The present invention relates to a secondary gas barrier for a liquefied gas storage tank having flexibility and a method for fabricating the same,

본 발명은 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 및 이의 제조방법에 관한 것으로서, 더욱 상세하게는 가요성(可撓性)을 갖게 하면서도 접착력 향상을 위하여 양쪽 면에 물리적·화학적 접착력 향상을 위하여 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후, 폴리아미드/실란화합물 표면처리를 한 알루미늄 호일을 사용하여 접착강도를 향상시키고 기계적 물성을 강화시켰으며, 알루미늄 호일과 보강섬유 사이의 접착을 위해 우레탄 탄성체를 접착시트로 사용하여 열적 안정성 확보와 인장강도를 향상시킨 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 및 이의 제조방법에 관한 것이다.The present invention relates to a flexible secondary gas barrier for a liquefied gas storage tank and a method of manufacturing the same. More particularly, the present invention relates to a secondary gas barrier for a liquefied gas storage tank having improved flexibility and improved physical and chemical adhesion After the treatment of one of chromate, plasma and corona for polyamide / silane compound, aluminum foil with surface treatment of polyamide / silane compound was used to improve the bonding strength and mechanical properties, and adhesion between aluminum foil and reinforcing fiber The present invention relates to a secondary gas barrier for a liquefied gas storage tank having flexibility which improves thermal stability and tensile strength by using an urethane elastomer as an adhesive sheet, and a method for producing the same.

본 발명의 배경이 되는 기술로는 특허공개 2009-0104688호(특허문헌 1)가 있다. 상기 배경기술에서는 금속박의 양면에 우레탄 수지를 적층시키는 동시에, 각각의 상기 우레탄 수지의 외면에 유리 섬유 직물을 적층시킴으로써 형성되는 적층 시트에 있어서, 상기 금속박의 상기 양면에는 페녹시 수지 및 실란 화합물을 함유하는 수지 조성물이 부착되어 있는 것을 특징으로 하는 적층 시트를 제안한다.  As a background of the present invention, Patent Document No. 2009-0104688 (Patent Document 1) is known. In the above background art, a urethane resin is laminated on both surfaces of a metal foil, and a glass fiber cloth is laminated on the outer surface of each of the urethane resins. In the laminated sheet, a phenoxy resin and a silane compound And a resin composition is adhered to the surface of the laminated sheet.

그러나 상기 배경기술은 우레탄 수지 접착시트의 낮은 내열성(60~120℃ 큐어제품)으로 LNG저장 탱크의 단열판넬 제조 공정 중 2차 접착 시 자동 부착 장치의 히팅 롤러에 의한 열적 안정성 문제가 발생하였으며, 2차 접착 공정 중 우레탄 수지 접착시트의 물성 약화 및 알루미늄 호일과 우레탄 수지 접착시트의 박리강도 저하되는 문제점이 있었다. 또한, 2차 접착 후 내열성 문제로 적층 시트내에 주름이 발생하는 문제가 있었다.However, the background art has a problem of thermal stability due to the heating roller of the automatic attaching apparatus during the secondary bonding in the process of manufacturing the insulating panel of the LNG storage tank due to the low heat resistance of the urethane resin adhesive sheet (60 to 120 ° C) The physical properties of the urethane resin adhesive sheet during the car bonding process and the peel strength of the aluminum foil and the urethane resin adhesive sheet are deteriorated. Further, there is a problem that wrinkles are generated in the laminated sheet due to heat resistance after secondary bonding.

특허공개 2009-0104688호Patent disclosure 2009-0104688

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로, 가요성(可撓性)을 갖게 하면서도 접착력향상을 위하여 양쪽 면에 물리적·화학적 접착력 향상을 위하여 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후, 폴리아미드/실란화합물 표면처리를 한 알루미늄 호일을 사용하여 접착강도를 향상시키고 기계적 물성을 강화시켰으며, 보강섬유를 우레탄 탄성체로 된 접착시트로 접착시킴으로써 열적 안정성 확보와 인장강도를 향상시킨 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 및 이의 제조방법을 제공하는데 그 목적이 있다.Disclosure of the Invention The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method for improving the physical and chemical adhesive strength on both sides, Aluminum foil with surface treatment of polyamide / silane compound improves adhesive strength and mechanical properties. Adhesion of reinforcing fiber with adhesive sheet made of urethane elastomer improves thermal stability and improves tensile strength. And a secondary gas barrier for a liquefied gas storage tank and a method of manufacturing the same.

본 발명은 양쪽 면에 물리적·화학적 접착력 향상을 위하여 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후, 폴리아미드/실란화합물 표면처리를 한 알루미늄 호일과, 상기 알루미늄 호일의 양쪽 면에 보강섬유의 일측 면에 우레탄 접착시트가 결합되어 구성된 보강재가 부착되어 일체로 구성된 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어를 제공하고자 한다.The present invention relates to an aluminum foil having a surface treated with a polyamide / silane compound after one of treatments of chromate, plasma and corona for improving the physical and chemical adhesion on both sides thereof, And a reinforcing member formed by bonding a urethane adhesive sheet to a surface of the secondary gas barrier.

또한, 상기 보강섬유는 유리섬유인 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어를 제공하고자 한다.The present invention also provides a secondary gas barrier for a liquefied gas storage tank having flexibility, wherein the reinforcing fiber is glass fiber.

본 발명은 알루미늄 호일의 양쪽 면에 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후, 폴리아미드/실란화합물 표면처리를 하는 알루미늄 호일 처리공정; 보강섬유와 우레탄 접착시트를 150~180℃의 히팅롤러와 가압롤러를 통과시켜 보강재를 형성하는 보강재 성형공정; 우레탄 접착시트가 일체화된 보강재를 상기 알루미늄 호일의 양면에 적층시키고 적층물을 로토큐어 성형기로 연속성형하여 시트화시키는 시트화공정; 시트화된 적층물을 열처리하고 후경화시켜 안정화시키는 안정화공정;을 포함하여 이루어지는 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 제조방법을 제공하고자 한다.The present invention relates to an aluminum foil treatment process for treating a surface of a polyamide / silane compound after treating both surfaces of an aluminum foil with one of chromate, plasma and corona; A reinforcing material forming step of forming a reinforcing material by passing the reinforcing fiber and the urethane adhesive sheet through a heating roller and a pressure roller at 150 to 180 캜; A sheetifying step of laminating a reinforcing material having an integrated urethane adhesive sheet on both sides of the aluminum foil, continuously forming the laminate with a Rotocure molding machine, and sheeting the sheet; And a stabilization step of stabilizing the sheeted laminate by heat treatment and post-curing to thereby form a flexible secondary gas barrier for a liquefied gas storage tank.

또한, 상기 우레탄 접착시트는 블로우 몰딩방법으로 형성되는 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 제조방법을 제공하고자 한다.The present invention also provides a method for manufacturing a secondary gas barrier for a liquefied gas storage tank having flexibility, wherein the urethane adhesive sheet is formed by a blow molding method.

본 발명의 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 및 이의 제조방법은 알루미늄 호일의 양쪽 면에 크로메이트, 플라즈마, 코로나 중 어느 하나의 처리를 한 후, 여기에 폴리아미드/실란화합물 표면처리를 하여 기계적 물성이 향상되고, 상온뿐만 아니라 저온환경 및 해수침지 등의 조건에서도 접착강도가 현저히 향상되는 효과가 있으며, 보강섬유를 우레탄 탄성체로 된 접착시트로 접착시킴으로써 가요성(可撓性)이 있으면서도 열적 안정성 확보와 인장강도를 향상시킬 수 있는 매우 유용한 효과가 있다.The secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention and its manufacturing method are characterized in that after both surfaces of an aluminum foil are treated with one of a chromate, a plasma and a corona, a polyamide / silane compound surface treatment The mechanical properties are improved and the bonding strength is remarkably improved not only at room temperature but also under a low temperature environment and seawater immersion. By bonding the reinforcing fibers with an adhesive sheet made of a urethane elastic material, There is a very useful effect that it is possible to secure the thermal stability and improve the tensile strength.

본 명세서에서 첨부되는 다음의 도면들은 본 발명의 바람직한 실시 예를 예시하는 것이며, 발명의 상세한 설명과 함께 본 발명의 기술사상을 더욱 이해시키는 역할을 하는 것이므로, 본 발명은 첨부한 도면에 기재된 사항에만 한정되어서 해석되어서는 아니 된다.
도 1은 본 발명의 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어의 구성도.
도 2는 본 발명의 보강재의 개략적인 제조 공정도.
도 3은 본 발명의 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 제조방법의 개략적인 제조 공정도.BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention. FIG.
Fig. 2 is a schematic manufacturing process diagram of the reinforcing material of the present invention. Fig.
3 is a schematic manufacturing process diagram of a method for manufacturing a secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention.

아래에서 본 발명은 첨부된 도면에 제시된 실시 예를 참조하여 상세하게 설명이 되지만 제시된 실시 예는 본 발명의 명확한 이해를 위한 예시적인 것으로 본 발명은 이에 제한되지 않는다. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

이하 바람직한 실시 예에 따라 본 발명의 기술적 구성을 상세히 설명하면 다음과 같다. Hereinafter, the technical structure of the present invention will be described in detail with reference to the preferred embodiments.

본 발명의 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어는 양쪽 면에 물리적·화학적 접착력 향상을 위하여 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후 폴리아미드/실란화합물 표면처리를 한 알루미늄 호일과, 상기 알루미늄 호일의 양쪽 면에 보강재가 부착되어 일체화된 적층구조를 갖는다.The secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention is prepared by treating one surface of either a chromate, a plasma or a corona in order to improve the physical and chemical adhesive force on both sides, And a laminated structure in which a reinforcing material is attached to both sides of the aluminum foil and integrated.

도 1에 도시된 바와 같이, 본 발명의 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어는 알루미늄 호일(100)과 상기 알루미늄 호일(100)의 양면에 보강재(200)가 구성된다.As shown in FIG. 1, the secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention comprises an aluminum foil 100 and a reinforcing material 200 on both sides of the aluminum foil 100.

상기 알루미늄 호일(100)은 두께가 50~100㎛ 사이의 제품을 사용하는데, 이는 가요성을 갖기 위한 최적의 두께이며, 10계열의 알루미늄 박으로 순도가 99.2% 이상의 연질제품 사용이 바람직하다. 상기 알루미늄 호일(100)의 두께가 100㎛ 초과하게 되면 가요성이 제대로 발현이 되지 않아 물성이 떨어지고, 두께가 50㎛ 미만이 되면 박리강도 저하나 파손 등의 문제가 있다.The aluminum foil 100 has a thickness of 50 to 100 μm, which is an optimum thickness for flexibility. It is preferable to use a 10-series aluminum foil and a soft product having a purity of 99.2% or more. If the thickness of the aluminum foil 100 exceeds 100 mu m, the flexibility is not properly manifested and the physical properties are lowered. If the thickness is less than 50 mu m, there is a problem that peeling strength is lowered or broken.

상기 알루미늄 호일(100)은 양쪽 면에 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후 폴리아미드/실란화합물 표면처리를 하여 구성된다. 알루미늄 호일(100) 양쪽 면에 크로메이트, 플라즈마, 코로나 중 어느 하나의 처리를 하는 것은 알루미늄 호일(100)과 우레탄 접착시트(220)의 물리적·화학적 접착력의 향상을 위해서이다.The aluminum foil 100 is formed by treating one surface of either of the surfaces of the aluminum foil 100 with a chromate, plasma, or corona, and then treating the surface of the polyamide / silane compound. The treatment of either the chromate, the plasma or the corona on both sides of the aluminum foil 100 is for the purpose of improving the physical and chemical bonding strength between the aluminum foil 100 and the urethane adhesive sheet 220.

크로메이트(chromating)는 크롬산 또는 중크롬산염을 주성분으로 하는 용액속에 물품을 넣어 피막을 입히는 것을 말한다. 코로나 처리는 고주파, 전기방전에 의한 표면처리를 통하여 접착강도를 증가시키는 것이고, 플라즈마 처리는 표면거칠기를 주어 접착능력을 향상시키는 것이다.Chromating refers to coating a film by placing an article in a solution containing chromic acid or dichromate as its main component. The corona treatment is to increase the bonding strength through surface treatment by high frequency and electric discharge, and the plasma treatment is to improve the bonding ability by imparting surface roughness.

폴리아미드/실란화합물 표면처리 또한 내구성과 접착력의 향상을 위하여 처리하는 것이다. The surface treatment of the polyamide / silane compound is also carried out in order to improve durability and adhesion.

표면처리제는 자체적으로 강한 접착력을 나타내는 것이 아니고 접착을 위한 전처리제로서, 무극성 자재의 표면 등에 처리되어 나중에 접착제가 도포 된 후 접착력이 떨어지는 것을 방지하기 위해서 처리하는 것이다. 폴리아미드/실란화합물은 우레탄 수지와의 화학적 상용성이 우수하여, 무기물인 알루미늄 호일(100)과 유기물인 우레탄 접착시트(220)의 접착력을 현저하게 향상시키기 위한 표면처리제로서 사용된다. 폴리아미드/실란화합물은 폴리아미드와 알콜류 용제를 교반하여 폴리아미드 바니쉬를 제조하고, 폴리아미드 바니쉬에 실란화합물 혼합 후 교반하여 제조된다.The surface treatment agent does not exhibit a strong adhesive force itself, but is a pretreatment agent for bonding, which is treated on the surface of the non-polar material to prevent the adhesive strength from deteriorating after the adhesive agent is applied later. The polyamide / silane compound is excellent in chemical compatibility with the urethane resin and is used as a surface treatment agent for remarkably improving the adhesion of the aluminum foil 100, which is an inorganic material, and the urethane adhesive sheet 220, which is an organic material. The polyamide / silane compound is prepared by stirring a polyamide and an alcohol solvent to prepare a polyamide varnish, mixing the silane compound with the polyamide varnish and then stirring.

상기 알루미늄 호일(100)의 양쪽 면에는 보강섬유(210)의 일측 면에 우레탄 접착시트(220)가 결합되어 구성된 보강재(200)가 부착되어 일체로 구성된다.A reinforcing member 200 is integrally formed on both sides of the aluminum foil 100 with a urethane adhesive sheet 220 bonded to one side of the reinforcing fiber 210.

삭제delete

상기 보강재(200)는 우레탄 접착시트(220)가 구성된 면이 알루미늄 호일(100)에 결합되도록 구성된다. 우레탄 접착시트(220)는 내열성이 상대적으로 높은 우레탄 탄성체(Thermoplastic Polyurethane Elastomer)를 사용하여 녹는점 온도가 160℃이상 되도록 하여 2차 가스배리어 제품의 열적 안정성을 확보할 수 있도록 한다. 상기 우레탄 접착시트는 경도가 고무경도계로 90A이상의 것을 사용하여 내열성뿐만 아니라 인장강도가 향상되도록 할 수 있으며, 두께는 50~200㎛로 하는 것이 바람직하다.The stiffener 200 is configured such that the surface on which the urethane adhesive sheet 220 is formed is bonded to the aluminum foil 100. The urethane adhesive sheet 220 is made of a thermoplastic polyurethane elastomer having a relatively high heat resistance so that the melting point of the urethane adhesive sheet 220 is 160 캜 or higher, thereby securing the thermal stability of the secondary gas barrier product. The urethane adhesive sheet may have a hardness of 90 A or more as a rubber hardness meter to improve the heat resistance as well as the tensile strength. The thickness of the urethane adhesive sheet is preferably 50 to 200 탆.

또한, 상기 보강섬유(210)는 내열성 등을 확보할 수 있도록 유리섬유를 사용하고, 2차 가스배리어의 내구성 및 강도 향상을 위해 Glycidoxy계 실란화합물로 처리하는 것이 바람직하다.It is preferable that the reinforcing fiber 210 is treated with a Glycidoxy silane compound to improve the durability and strength of the secondary gas barrier by using glass fiber so as to secure heat resistance and the like.

본 발명의 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 제조방법은 알루미늄 호일의 양쪽 면에 크로메이트, 플라즈마, 코로나 중 어느 하나의 처리를 한 후 폴리아미드/실란화합물 표면처리를 하는 알루미늄 호일 처리공정; 보강재와 우레탄 접착시트를 150~180℃의 히팅롤러와 가압롤러를 통과시켜 일체로 성형하는 보강재 성형공정; 우레탄 접착시트가 일체화된 보강재를 상기 알루미늄 호일의 양면에 적층시키고 적층물을 로토큐어 성형기로 연속성형하여 시트화시키는 시트화공정; 시트화된 적층물을 열처리하고 후경화 시켜 안정화시키는 안정화공정; 으로 이루어진다.The method for producing a secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention is characterized in that aluminum foil is subjected to any one of chromate treatment, plasma treatment and corona treatment on both sides thereof, followed by aluminum foil treatment fair; A reinforcing material forming step of integrally forming the reinforcing material and the urethane adhesive sheet through a heating roller and a pressure roller at 150 to 180 캜; A sheetifying step of laminating a reinforcing material having an integrated urethane adhesive sheet on both sides of the aluminum foil, continuously forming the laminate with a Rotocure molding machine, and sheeting the sheet; A stabilizing step of heat treating the sheeted laminate and then curing it to stabilize it; Lt; / RTI >

알루미늄 호일 처리공정은 알루미늄 호일의 양쪽 면에 크로메이트, 플라즈마, 코로나 중 어느 하나의 처리를 한 후, 폴리아미드/실란화합물 표면처리를 하는 공정이다. 크로메이트, 플라즈마, 코로나 중 어느 하나의 처리를 한 알루미늄 호일의 양쪽 면에 폴리아미드/실란화합물을 4~13g/㎡의 두께로 표면코팅 하여, 120~200℃의 건조챔버를 통과하여 알루미늄 호일과 물리적·화학적 접착이 이루어지도록 한다.The aluminum foil treatment is a step of treating the surface of the polyamide / silane compound after treating either side of the aluminum foil with either chromate, plasma or corona. A polyamide / silane compound was applied to both surfaces of an aluminum foil having either one of a chromate, a plasma and a corona treated at a thickness of 4 to 13 g / m 2, passed through a drying chamber at 120 to 200 ° C, · Allow chemical bonding to take place.

보강재 성형공정은 보강재(200)를 형성하는 공정으로 보강섬유(210)의 일측 면에 우레탄 접착시트(220)를 150~180℃의 히팅롤러(320)와 가압롤러(330)를 통과시켜 일체로 성형하는 공정이다.The reinforcing material forming process is a process of forming the reinforcing material 200. The urethane adhesive sheet 220 is passed through the heating roller 320 and the pressing roller 330 at 150 to 180 ° C to one side of the reinforcing fiber 210, Molding process.

도 2에 도시된 바와 같이, 보강섬유(210)와 우레탄 접착시트(220)를 각각 공급롤러(310a)(310b)에 거치시켜 상기의 보강섬유(210)의 일측 면에 우레탄 접착시트(220)가 맞닿아 히팅롤러(320)로 공급되도록 하고, 히팅롤러(320)와 가압롤러(330)를 통과하여 일체로 성형되고 권취롤러(350)에 권취되게 된다.2, the reinforcing fibers 210 and the urethane adhesive sheet 220 are placed on the feed rollers 310a and 310b, respectively, so that the urethane adhesive sheet 220 is attached to one side of the reinforcing fibers 210, And is supplied to the heating roller 320 and passes through the heating roller 320 and the pressure roller 330 to be integrally formed and wound on the winding roller 350.

가압롤러(330)를 통과하여 권취롤러(350)에 권취되기 전에 냉각구간을 통과시키도록 하여 성형된 보강재(200)를 안정화시킨다.Passes through the cooling section before passing through the pressure roller (330) and wound around the winding roller (350), thereby stabilizing the formed stiffener (200).

보강섬유(210)는 유리섬유를 사용하여 내열성을 강화시키고 Glycidoxy계 실란화합물 처리를 통해 내구성 및 우레탄 접착시트(220)와의 접착력을 향상시킨다. Glycidoxy계 실란화합물은 무기물인 유리섬유와 유기물인 우레탄 접착시트와의 화학적 접착력을 향상시키기 위한 표면처리제로 사용된다. The reinforcing fiber 210 enhances heat resistance by using glass fiber and improves the durability through the treatment of the glycidoxy silane compound and the adhesion with the urethane adhesive sheet 220. The Glycidoxy silane compound is used as a surface treatment agent for improving the chemical adhesion between glass fiber, which is an inorganic material, and urethane adhesive sheet, which is an organic material.

우레탄 접착시트(220)는 내열성이 상대적으로 높은 우레탄 탄성체(Thermoplastic Polyurethane Elastomer)의 사용으로 녹는점 온도가 160℃ 이상 되도록 하여 2차 가스배리어 제품의 열적 안정성을 확보할 수 있고, 경도가 고무경도계로 90A 이상의 것을 사용하여 내열성 뿐만 아니라 인장강도가 향상되도록 할 수 있다. The urethane adhesive sheet 220 can ensure the thermal stability of the secondary gas barrier product by making use of a thermoplastic polyurethane elastomer having a relatively high heat resistance so that the melting point temperature is 160 ° C or higher, 90A or more can be used to improve the tensile strength as well as the heat resistance.

시트화공정은 우레탄 접착시트가 일체화된 보강재를 상기 알루미늄 호일의 양면에 적층시키고 적층물을 로토큐어 성형기로 연속성형하여 시트화시키는 공정이다.The sheet forming step is a step of laminating a reinforcing material in which the urethane adhesive sheet is integrated on both sides of the aluminum foil, and continuously forming the laminate by a Rotocure molding machine.

도 3에 도시된 바와 같이, 시트화공정은 로토큐어 성형기(400)를 이용한 것인데, 로토큐어(Rotocure) 성형기는 기성제품으로 전열 또는 증기, 열매 가열장치가 내장된 메인롤러(410)의 상하에 각각 가압롤러(420b)(420a)를, 후방에 장력조절롤러(430)를 구성하고 상하 가압롤러(420)와 장력조절롤러(430)에 밴드가 순환되도록 하여, 알루미늄 호일(100)과 보강재(200)가 하단의 가압롤러(420a)로 공급되어 메인롤러(410)에서 가열, 가압성형하여 일체화한 후 가압롤러(420b)를 통하여 권취롤러(440)로 이송되게 되는 것이다. 이때, 가열은 150~160℃에서, 가압은 1~5kfg/㎠로 성형한다.3, the sheet forming process is performed by using a Rotocure molding machine 400. The Rotocure molding machine is an upright product, which is mounted on the upper and lower sides of a main roller 410 having an electric heating, steam, The pressure rollers 420b and 420a constitute a tension regulating roller 430 and the band is circulated to the upper and lower pressing rollers 420 and 430 so that the aluminum foil 100 and the reinforcing material 200 are supplied to the lower pressure roller 420a and are heated and press-molded by the main roller 410 to be integrated and then conveyed to the winding roller 440 through the pressure roller 420b. At this time, the heating is performed at 150 to 160 ° C, and the pressing is performed at 1 to 5 kfg / cm 2.

알루미늄 호일(100)과 우레탄 접착시트(220)가 일체화된 보강재(200)는 양쪽 면에 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후와 폴리아미드/실란화합물 표면처리를 하여 구성된 알루미늄 호일의 양면에 우레탄 접착시트가 일체화된 보강재를 적층시키도록 하여 성형기로 일체화 성형시킨다. The reinforcing member 200 in which the aluminum foil 100 and the urethane adhesive sheet 220 are integrated has a structure in which both surfaces are treated with one of chromate, plasma and corona, and a polyamide / silane compound surface treatment, And the reinforcing member in which the urethane adhesive sheet is integrated is laminated.

상기와 같이, 보강재 성형공정과 시트화공정을 별도로 구성하는 것은 보강재 성형공정에서 1차 성형품을 제조하고 다시 로토큐어 성형기로 성형함으로써, 보강재의 뒤틀림현상 방지 및 1차 성형품의 중간확인을 통해 2차 가스배리어 제품의 균일성을 향상시킬 수 있기 때문이다.As described above, the stiffener forming step and the sheet forming step are separately formed by forming the primary molded product in the stiffener forming step and then molding the same with the Rotocure molding machine, thereby preventing the warping of the stiffener and intermediate confirmation of the primary molded product. The uniformity of the gas barrier product can be improved.

안정화공정은 시트화된 적층물을 열처리하고 후경화시켜 안정화시키는 공정이다. 열처리와 후경화 과정을 거치는 것은 보강재와 알루미늄 호일을 접착하는 우레탄 접착시트의 용융 및 접착 후 분자배열을 안정화시킴으로써 접착강도를 높이기 위해서이다. 안정화공정은 롤 단위로 권취된 시트를 건조 챔버에서 120~160℃, 10~18시간 열처리 및 후경화 시켜 완성하며, 건조 챔버 내부에서 어닐링(Annealing)의 방법으로 냉각하여 제조한다.The stabilization process is a process for stabilizing the sheeted laminate by heat treatment and post curing. The heat treatment and the post curing process are performed in order to increase the bonding strength by stabilizing the molecular arrangement after fusion and adhesion of the urethane adhesive sheet for bonding the reinforcing material and the aluminum foil. The stabilization process is accomplished by heat-treating the roll-wound sheet in a drying chamber at 120 to 160 ° C for 10 to 18 hours and then curing the sheet, and cooling the sheet in the drying chamber by annealing.

또한, 상기 우레탄 접착시트는 블로우 몰딩방법으로 형성되는 것을 특징으로 한다. 상기 우레탄 접착시트는 블로우몰딩의 방법에 의해서 제조되는데, 블로우몰딩(blow molding)은 압출이나 사출에 의해 튜브상으로 예비성형(Parison)을 하여, 이것을 금형에 끼워서 내부로 공기를 불어 넣어 부풀게 해서 냉각 고화시켜 특정한 형태의 고형물을 만드는 방법이다. T-다이와 익스투르더기(extruder)를 통하여 공급되는 제품에 비하여 상대적으로 저렴하며 생산성이 있는 블로우 몰딩에 의하여 필름을 제조하는 것이다.Further, the urethane adhesive sheet is characterized by being formed by a blow molding method. The urethane adhesive sheet is produced by a blow molding method. Blow molding is preliminarily molded in a tube shape by extrusion or injection molding. The urethane adhesive sheet is inserted into a mold, blowing air into the mold, It is a method of solidifying a specific type of solid. Is to produce the film by blow molding which is relatively inexpensive and productive as compared to products supplied through T-die and extruder.

본 발명의 2차 배리어 적층시트와 다른 적층시트의 물성비교를 위하여 다음과 같이 시험하였다.The properties of the secondary barrier laminate sheet of the present invention and other laminate sheets were tested as follows.

1. 시험항목 : 인장강도, 인장전단강도, 접착박리강도1. Test items: tensile strength, tensile shear strength, adhesive peel strength

2. 각 시료별 조건2. Conditions for each sample

(1) 시료 1 (1) Sample 1

a) 구성a) Configuration

실란화합물처리된 알루미늄 호일, 알루미늄 호일 양면에 차례로 구성되는 우레탄 수지 및 유리섬유로 구성된 시트.An aluminum foil treated with a silane compound, a urethane resin sequentially formed on both sides of an aluminum foil, and a sheet made of glass fiber.

b) 제조방법-열융착방법으로 제조(로토큐어)b) Manufacturing method - Manufactured by thermal fusion method (Rotocure)

알루미늄 호일 전처리 : 알루미늄80㎛, Glycidoxy실란, 70℃, 3분Aluminum foil Pretreatment: Aluminum 80 ㎛, Glycidoxy silane, 70 캜, 3 min

보강재 전처리 : Amino실란Pretreatment of reinforcement: Amino silane

접착시트 : 연화점 160℃, 두께 200㎛Adhesive sheet: softening point 160 캜, thickness 200 탆

로토큐어 : 표면온도 230~240℃Rotocure: Surface temperature 230 ~ 240 ℃

Aftercure : 210℃, 2분Aftercure: 210 ℃, 2 minutes

(2) 시료 2 (2) Sample 2

a) 구성a) Configuration

실란화합물 처리된 알루미늄 호일, 알루미늄 호일 양쪽 면에 차례로 구성되는 우레탄 수지 및 유리섬유로 구성된 시트.An aluminum foil treated with a silane compound, a urethane resin sequentially formed on both sides of the aluminum foil, and a sheet made of glass fiber.

b) 제조방법 - Extruder T-die Lamination 방법b) Manufacturing method - Extruder T-die Lamination method

알루미늄 호일 전처리 : 알루미늄80㎛, Glycidoxy실란, 70℃, 3분Aluminum foil Pretreatment: Aluminum 80 ㎛, Glycidoxy silane, 70 캜, 3 min

보강재 전처리 : Amino실란Pretreatment of reinforcement: Amino silane

압출기에 우레탄 접착제 펠렛 투입 후 압출성형 : 약 200℃Extruder after pelletization of urethane adhesive pellet: about 200 ° C

보강재/접착제시트/금속박을 롤러통과하면서 냉각 경화Stiffener / Adhesive sheet / Cold rolled metal foil through the roller

Aftercure : 160℃, 5분 후 상온방치Aftercure: Leave at room temperature after 5 minutes at 160 ℃

(3) 시료 3 (3) Sample 3

a) 구성a) Configuration

실란화합물처리된 알루미늄 호일, 알루미늄 호일 양면에 차례로 구성되는 우레탄 수지 및 유리섬유로 구성된 시트.An aluminum foil treated with a silane compound, a urethane resin sequentially formed on both sides of an aluminum foil, and a sheet made of glass fiber.

b) 제조방법 b) Method of manufacture

열융착방법으로 제조(로토큐어)Manufactured by thermal fusion method (Rotocure)

알루미늄 호일 전처리 : 알루미늄80㎛, Glycidoxy실란, 80℃, 3분Aluminum foil Pretreatment: aluminum 80 탆, Glycidoxy silane, 80 캜, 3 minutes

보강재 전처리 : Amino실란Pretreatment of reinforcement: Amino silane

복합시트 : 100℃ 예비열 통과Composite sheet: Pass through preheat at 100 ℃

로토큐어 : 200℃ 롤러 통과 후 냉각 경화Rotocure: After curing at 200 ° C

Aftercure : 180℃, 5분Aftercure: 180 ℃, 5 minutes

(4) 시료 4 (4) Sample 4

a) 구성a) Configuration

알루미늄 호일, 알루미늄 호일 양면에 차례로 구성되는 에폭시접착필름 및 보강유직물로 구성된 시트.Sheet consisting of an aluminum foil, an epoxy adhesive film which is in turn formed on both sides of the aluminum foil, and a reinforcing woven fabric.

b) 제조방법 b) Method of manufacture

열융착방법으로 제조(로토큐어)Manufactured by thermal fusion method (Rotocure)

알루미늄 호일 전처리 : 알루미늄70㎛, 무처리Aluminum foil Pretreatment: Aluminum 70㎛, Untreated

접착필름제조 : 바니쉬접착필름 제조(T-die), 40~100g/㎡Adhesive film production: varnish adhesive film production (T-die), 40 to 100 g / m2

로토큐어 : 170℃, 5kfg/㎠ 롤러 통과Rotocure: 170 ° C, 5kfg / ㎠ Roller passed

(5) 시료 5(5) Sample 5

a) 구성a) Configuration

페녹시수지 및 실란화합물을 함유하는 수지 조성물로 처리된 알루미늄 호일, 알루미늄 호일 양쪽 면에 우레탄 수지를 적층시키고, 각각의 우레탄 수지의 외면에 유리섬유직물을 적층시킨 적층시트.A laminated sheet obtained by laminating a urethane resin on both sides of an aluminum foil and an aluminum foil treated with a resin composition containing a phenoxy resin and a silane compound and laminating a glass fiber cloth on the outer surface of each urethane resin.

b) 제조방법b) Method of manufacture

열융착방법으로 제조(로토큐어)Manufactured by thermal fusion method (Rotocure)

알루미늄 호일 전처리 : 알루미늄 70㎛, 페녹시수지 및 실란화합물을 함유하는 수지 조성물, 150℃, 5g/㎡ 표면코팅Aluminum foil Pretreatment: Aluminum 70 탆, resin composition containing phenoxy resin and silane compound, 150 캜, 5 g / ㎡ Surface coating

보강유리섬유 전처리 : 합성수지계 사이즈제, 중량 0.4% 이하Reinforced glass fiber pretreatment: synthetic resin size agent, 0.4% by weight or less

로토큐어 : 표면온도 30~40℃Rotocure: Surface temperature 30 ~ 40 ℃

Aftercure : 115℃, 48시간Aftercure: 115 ℃, 48 hours

(6) 시료 6 (6) Sample 6

a) 구성a) Configuration

알루미늄 호일 양쪽 면에 크로메이트 처리를 한 후 폴리아미드/실란화합물 표면처리를 한 알루미늄 호일, 알루미늄 호일 양면에 차례로 구성되는 우레탄 접착시트 및 보강섬유로 구성된 시트.An aluminum foil subjected to a chromate treatment on both sides of an aluminum foil and then subjected to a polyamide / silane compound surface treatment, a urethane adhesive sheet sequentially formed on both sides of an aluminum foil, and a sheet composed of reinforcing fibers.

b) 제조방법 - 열융착방법으로 제조(로토큐어)b) Manufacturing method - Manufactured by thermal fusion method (Rotocure)

알루미늄 호일 전처리 : 알루미늄 70㎛, 크로메이트, 폴리아미드/실란화합물 표면처리, 150~200℃, 3분Aluminum foil Pretreatment: aluminum 70㎛, chromate, polyamide / silane compound surface treatment, 150-200 ℃ for 3 minutes

보강섬유 전처리 : Glycidoxy계 실란화합물, 중량 0.5% 이하Pretreatment of reinforcing fiber: Glycidoxy-based silane compound, weight 0.5% or less

보강재제조 : 우레탄 접착시트 및 유리섬유, 165~170℃ 롤러Stiffener manufacturing: urethane adhesive sheet and glass fiber, roller at 165 ~ 170 ℃

로토큐어 : 보강재+알루미늄 호일, 160~165, 3kgf/㎠ 롤러 통과Rotocure: reinforcement + aluminum foil, 160 ~ 165, 3kgf / ㎠ Roller passed

안정화 : 140℃, 14시간Stabilization: 140 ° C, 14 hours

3. 시험결과3. Test results

시험항목Test Items 시험조건Exam conditions 시료1Sample 1 시료2Sample 2 시료3Sample 3 시료4Sample 4 시료5Sample 5 시료6Sample 6
인장강도
(N/m)
The tensile strength
(N / m)
상온
(20℃)Room temperature
(20 DEG C) 경사slope 171,623171,623 178,487178,487 186,33186,33 125,000125,000 164,200164,200 175,708175,708 위사Weft ­ ­ ­ 123,000123,000 182,600182,600 174,819174,819 극저온
(-163℃)Cryogenic temperature
(-163 DEG C) 경사slope 245,715245,715 241,252241,252 266,750266,750 242,000242,000 231,800231,800 265,065265,065 위사Weft ­ ­ ­ 255,000255,000 250,200250,200 235,143235,143 인장전단강도
(Mpa)
Tensile shear strength
(Mpa)
상온
(20℃)Room temperature
(20 DEG C) 에폭시Epoxy 9.29.2 9.49.4 ­ ­ ­ 16.116.1 우레탄urethane ­ ­ ­ ­ ­ 11.311.3 극저온
(-163℃)Cryogenic temperature
(-163 DEG C) 에폭시Epoxy 11.311.3 11.011.0 ­ ­ ­ 14.714.7 우레탄urethane ­ ­ ­ ­ ­ 20.520.5

접착박리강도
(N/2.5㎝)

Adhesive peel strength
(N / 2.5 cm) 상온
(20℃)Room temperature
(20 DEG C) 경사slope 72.672.6 68.268.2 74.574.5 120120 185185 290.0290.0 위사Weft ­ ­ ­ ­ 192192 263.8263.8 극저온
(-163℃)Cryogenic temperature
(-163 DEG C) 경사slope 137.3이상137.3 or higher 132.4이상132.4 or higher 147.1이상147.1 or higher 8383 9393 141.5141.5 위사Weft ­ 9797 150.4150.4 해수침지
6주후
상온(20℃)Seawater immersion
Six weeks
At room temperature (20 ° C) 경사slope 168168 266266 위사Weft 172172 273273

시험결과에서 보듯이, 본 발명의 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 제조방법으로 제조된 2차 가스배리어인 시료 6이 타 시료에 비하여 인장강도, 인장전단강도, 접착박리강도에서 모두 높게 측정되었다.As shown in the test results, the sample 6, which is a secondary gas barrier prepared by the method for producing a secondary gas barrier for a liquefied gas storage tank having flexibility according to the present invention, has tensile strength, tensile shear strength and adhesive peel strength All were measured highly.

지금까지 본 발명은 제시된 실시 예를 참조하여 상세하게 설명이 되었지만 이 분야에서 통상의 지식을 가진 자는 제시된 실시 예를 참조하여 본 발명의 기술적 사상을 벗어나지 않는 범위에서 다양한 변형 및 수정 발명을 만들 수 있을 것이다. 본 발명은 이와 같은 변형 및 수정 발명에 의하여 제한되지 않으며 다만 아래에 첨부된 청구범위에 의하여 제한된다. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

100 : 알루미늄 호일
200 : 보강재
220 : 우레탄 접착시트
310a, 310b : 공급롤러
320 : 히팅롤러
330 : 가압롤러
350 : 권취롤러
400 : 로토큐어 성형기
410 : 메인롤러
420a, 420b : 가압롤러
430 : 장력조절롤러
440 : 권취롤러100: aluminum foil
200: Stiffener
220: urethane adhesive sheet
310a, 310b: feed roller
320: Heating roller
330: pressure roller
350: take-up roller
400: Rotocure molding machine
410: main roller
420a, 420b: pressure roller
430: tension adjusting roller
440: take-up roller

Claims (4)

양쪽 면에 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후, 폴리아미드/실란화합물 표면처리를 한 알루미늄 호일과,
상기 알루미늄 호일의 양쪽 면에 보강섬유의 일측 면에 우레탄 접착시트가 결합되어 구성된 보강재가 부착되어 일체로 구성된 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어.An aluminum foil having a surface treated with a polyamide / silane compound after one of either chromate treatment, plasma treatment or corona treatment is performed on both surfaces,
And a reinforcing member formed by joining a urethane adhesive sheet to one side of the reinforcing fiber on both sides of the aluminum foil. 제 1항에 있어서,
상기 보강섬유는 유리섬유인 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어.The method according to claim 1,
Wherein the reinforcing fibers are glass fibers. ≪ RTI ID = 0.0 > 21. < / RTI > 알루미늄 호일의 양쪽 면에 크로메이트, 플라즈마, 코로나 중 하나의 처리를 한 후와 폴리아미드/실란화합물 표면처리를 하는 알루미늄 호일 처리공정;
보강섬유와 우레탄 접착시트를 150~180℃의 히팅롤러와 가압롤러를 통과시켜 일체로 성형하는 보강재 성형공정;
우레탄 접착시트가 일체화된 보강재를 상기 알루미늄 호일의 양면에 적층시키고 적층물을 로토큐어 성형기로 연속성형하여 시트화시키는 시트화공정;
시트화된 적층물을 열처리하고 후경화시켜 안정화시키는 안정화공정;으로 이루어지는 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 제조방법.An aluminum foil treatment step in which both surfaces of the aluminum foil are treated with one of chromate, plasma and corona and the surface treatment of the polyamide / silane compound;
A reinforcing material forming step of integrally forming the reinforcing fiber and the urethane adhesive sheet through a heating roller and a pressure roller at 150 to 180 캜;
A sheetifying step of laminating a reinforcing material having an integrated urethane adhesive sheet on both sides of the aluminum foil, continuously forming the laminate with a Rotocure molding machine, and sheeting the sheet;
And a stabilization step of stabilizing the sheeted laminate by heat treatment and post-curing to form a flexible secondary gas barrier for a liquefied gas storage tank having flexibility. 제 3항에 있어서,
상기 우레탄 접착시트는 블로우 몰딩방법으로 형성되는 것을 특징으로 하는 가요성을 갖는 액화가스 저장탱크용 2차 가스배리어 제조방법.The method of claim 3,
Wherein the urethane adhesive sheet is formed by a blow molding method. ≪ RTI ID = 0.0 > 21. < / RTI >
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017200133A1 (en) * 2016-05-17 2017-11-23 주식회사 한국카본 Flexible secondary gas barrier for liquefied gas storage tank, having improved fatigue resistance performance by having reinforcing material thereof replaced
KR20210144963A (en) 2020-05-21 2021-12-01 김제근 Reinforcement For Liquefied Gas Storage Tank Using Pure Copper Plate With Oxide Film And Its Manufacturing Method
US11387584B1 (en) 2020-12-31 2022-07-12 Hicon Co., Ltd. Contact pin for testing semiconductor IC for high speed signal, spring contact including same, and socket device

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WO2017200133A1 (en) * 2016-05-17 2017-11-23 주식회사 한국카본 Flexible secondary gas barrier for liquefied gas storage tank, having improved fatigue resistance performance by having reinforcing material thereof replaced
KR20210144963A (en) 2020-05-21 2021-12-01 김제근 Reinforcement For Liquefied Gas Storage Tank Using Pure Copper Plate With Oxide Film And Its Manufacturing Method
US11387584B1 (en) 2020-12-31 2022-07-12 Hicon Co., Ltd. Contact pin for testing semiconductor IC for high speed signal, spring contact including same, and socket device

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