KR102594668B1 - Pressure vessel - Google Patents

Pressure vessel Download PDF

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Publication number
KR102594668B1
KR102594668B1 KR1020220098753A KR20220098753A KR102594668B1 KR 102594668 B1 KR102594668 B1 KR 102594668B1 KR 1020220098753 A KR1020220098753 A KR 1020220098753A KR 20220098753 A KR20220098753 A KR 20220098753A KR 102594668 B1 KR102594668 B1 KR 102594668B1
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South Korea
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liner
layer
surface irregularities
plastic
pressure vessel
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KR1020220098753A
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Korean (ko)
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KR20220116113A (en
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김원영
고영관
김대근
이유정
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롯데케미칼 주식회사
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Publication of KR102594668B1 publication Critical patent/KR102594668B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B32B1/02—
    • 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
    • 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
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/263—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer having non-uniform thickness
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • 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
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
    • 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
    • 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
    • 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
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide 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
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/043—HDPE, i.e. high density polyethylene
    • 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
    • B32B2439/00—Containers; Receptacles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)

Abstract

압력용기는, 유체 수용을 위한 내부 수용공간을 구비하는 플라스틱 소재의 라이너와, 라이너의 외부를 둘러싸는 섬유보강층과, 라이너와 섬유보강층 사이에 위치하는 접착제층을 포함한다. 라이너는, 표면 요철을 가지는 내부 라이너층과, 내부 라이너층의 표면 요철과 동일한 내측 표면 요철 및 접착제층과 접하는 외측 표면 요철을 가지는 외부 라이너층을 포함한다.The pressure vessel includes a liner made of plastic having an internal receiving space for receiving fluid, a fiber-reinforced layer surrounding the outside of the liner, and an adhesive layer located between the liner and the fiber-reinforced layer. The liner includes an inner liner layer having surface irregularities, an outer liner layer having inner surface irregularities identical to the surface irregularities of the inner liner layer, and outer surface irregularities in contact with the adhesive layer.

Description

압력용기 {PRESSURE VESSEL}Pressure vessel {PRESSURE VESSEL}

본 발명은 압력용기에 관한 것으로서, 구체적으로 표면 요철을 갖는 라이너가 구비된 압력용기에 관한 것이다.The present invention relates to a pressure vessel, and specifically to a pressure vessel provided with a liner having surface irregularities.

일반적으로, 압력용기는 액화 석유가스(LPG), 압축 천연가스(CNG), 경질 탄화수소(메탄, 프로판, 부탄) 및 수소가스 등을 포함하는 각종 고압 유체들을 안전하게 저장할 수 있도록 제작된다.Generally, pressure vessels are manufactured to safely store various high-pressure fluids, including liquefied petroleum gas (LPG), compressed natural gas (CNG), light hydrocarbons (methane, propane, butane), and hydrogen gas.

이러한 압력용기는, 일반적으로 내압의 대부분을 지탱하는 외부 복합재층과 내부의 형틀을 제공하는 라이너(liner)로 구성되어 있고, 전통적으로 금속으로 제조되었다. 그러나, 종래의 금속성 라이너로 제조되는 압력용기는 금속의 특성상 중량이 무거우며 부식에 매우 약한 동시에 제조원가도 높다는 문제가 있다. These pressure vessels typically consist of an outer composite layer that supports most of the internal pressure and a liner that provides an inner framework, and are traditionally made of metal. However, pressure vessels manufactured with conventional metallic liners have the problem of being heavy due to the nature of the metal and being very susceptible to corrosion, while also having high manufacturing costs.

이에, 플라스틱 소재의 라이너 외부에 탄소섬유나 유리섬유 등의 보강섬유를 감거나 적층한 압력용기의 사용이 증가되고 있다.Accordingly, the use of pressure vessels in which reinforcing fibers, such as carbon fiber or glass fiber, are wound or laminated on the outside of a plastic liner is increasing.

예컨대, 특허문헌 1(국내 등록특허공보 제10-0738723호)에는 탄소섬유 또는 유리섬유와 같은 보강섬유가 와인딩(winding)된 고밀도폴리에틸텐(HDPE) 라이너로 이루어진 압력용기가 공지되어 있다. 상기 HDPE 라이너는 금속성 라이너에 비해 가볍고 내부식성이 우수한 장점을 가지고 있다. 그러나, 상기 와인딩에 의해 라이너에 보강섬유가 접착되는 것이 아니기 때문에 이들 사이에는 간극이 존재하고, 상기 간극에는 라이너를 투과한 유체가 유입될 수 있다. 이렇게 유입된 유체는 압력용기 변형의 원인이 될 수 있다. 그리고, 상기 간극 내의 유체가 외부로 확산될 경우 불쾌한 냄새를 유발하게 되며, 폭발 가능성도 내재된다.For example, in Patent Document 1 (Domestic Patent Publication No. 10-0738723), a pressure vessel made of a high-density polyethylene (HDPE) liner with reinforcing fibers such as carbon fiber or glass fiber wound is known. The HDPE liner has the advantage of being lightweight and having excellent corrosion resistance compared to metallic liners. However, since the reinforcing fibers are not adhered to the liner by the winding, a gap exists between them, and fluid that has passed through the liner can flow into the gap. Fluid introduced in this way may cause deformation of the pressure vessel. Additionally, if the fluid within the gap diffuses to the outside, it causes an unpleasant odor and also has the potential for explosion.

더욱이, 상기 HDPE는 유체, 예컨대 LPG에 대해 투과성이 있는 고분자이므로, 특허문헌 1에 공지된 압력용기는 유체의 누설율을 허용치 이하로 유지하는데 한계가 있다. 통상, 압력용기의 허용 누설율은 LPG의 경우 0.5~1g/day(20bar 압력 및 50℃ 온도에서 24L LPG 실린더 조건), 질소(N2) 가스의 경우 6cc/l/hr, 메탄(CH4) 가스의 경우 0.25cc/l/hr, 수소(H2) 가스의 경우 46cc/l/hr 정도이며, 이러한 허용된 누설율 이상의 누설율은 디자인, 규제 및 소비 측면에서 허용되지 않는다. Moreover, since the HDPE is a polymer that is permeable to fluids, such as LPG, the pressure vessel known in Patent Document 1 has limitations in maintaining the leakage rate of the fluid below the allowable level. Typically, the allowable leak rate of pressure vessels is 0.5~1g/day for LPG (24L LPG cylinder condition at 20bar pressure and 50℃ temperature), 6cc/l/hr for nitrogen (N 2 ) gas, and methane (CH 4 ). For gas, it is about 0.25cc/l/hr, and for hydrogen (H 2 ) gas, it is about 46cc/l/hr. Leakage rates higher than this permitted leakage rate are not permitted in terms of design, regulation, and consumption.

이러한 문제를 해결하기 위한 방법으로서, 특허문헌 2(국내 등록특허공보 제10-1855874호)는 유체의 충전과 배출이 가능한 열가소성 수지의 라이너; 제1 합성수지에 함침된 보강섬유에 의해 상기 라이너의 외측에 형성되는 보강층; 및 제2 합성수지에 의해 상기 라이너와 상기 보강층 사이에 제공되는 접착층을 포함하는 압력용기에 대해 기재하고 있다. 그리고, 특허문헌 2은 접착력 향상을 위하여, 상기 라이너의 외주면을 표면처리하여 요철을 형성하였고, 상기 표면처리에는 플라즈마 처리 또는 샌드블라스트 처리 등을 통한 가공법을 사용하였다. 특허문헌 2에 따르면, 라이너와 보강층 사이의 접착력이 향상되고, 이들 사이에 간극이 거의 존재하지 않아, 유체 누설율이 허용치 이하로 유지될 수 있다. 그러나, 이와 같은 방법은 고가 장비가 필요하며 유틸리티 비용이 증가하기 때문에 경제성이 떨어지는 단점이 있다.As a method to solve this problem, Patent Document 2 (Korean Patent Publication No. 10-1855874) discloses a thermoplastic resin liner capable of filling and discharging fluid; a reinforcing layer formed on the outside of the liner by reinforcing fibers impregnated with a first synthetic resin; and an adhesive layer provided between the liner and the reinforcing layer by a second synthetic resin. In addition, in Patent Document 2, in order to improve adhesion, the outer peripheral surface of the liner was surface treated to form irregularities, and a processing method such as plasma treatment or sandblasting was used for the surface treatment. According to Patent Document 2, the adhesion between the liner and the reinforcing layer is improved, and there is almost no gap between them, so the fluid leakage rate can be maintained below the allowable value. However, this method has the disadvantage of being less economical because it requires expensive equipment and increases utility costs.

KRKR 100738723100738723 B1B1 KRKR 101855874101855874 B1B1

본 발명은 라이너의 구조를 개선하여 기계적인 강도를 높임과 동시에 요철 손상을 최소화할 수 있는 압력용기를 제공하고자 한다.The present invention seeks to provide a pressure vessel that can improve the structure of the liner to increase mechanical strength while minimizing uneven damage.

본 발명의 일 실시예에 따른 압력용기는, 유체 수용을 위한 내부 수용공간을 구비하는 플라스틱 소재의 라이너와, 라이너의 외부를 둘러싸는 섬유보강층과, 라이너와 섬유보강층 사이에 위치하는 접착제층을 포함한다. 라이너는, 표면 요철을 가지는 내부 라이너층과, 내부 라이너층의 표면 요철과 동일한 내측 표면 요철 및 접착제층과 접하는 외측 표면 요철을 가지는 외부 라이너층을 포함한다.A pressure vessel according to an embodiment of the present invention includes a liner made of plastic having an internal receiving space for accommodating fluid, a fiber-reinforced layer surrounding the outside of the liner, and an adhesive layer located between the liner and the fiber-reinforced layer. do. The liner includes an inner liner layer having surface irregularities, an outer liner layer having inner surface irregularities identical to the surface irregularities of the inner liner layer, and outer surface irregularities in contact with the adhesive layer.

외부 라이너층은 결정질 영역으로 구성될 수 있으며, 불규칙한 두께를 가질 수 있다. 내부 라이너층은 결정질 영역과 비결정질 영역을 포함할 수 있다.The outer liner layer may consist of crystalline regions and may have an irregular thickness. The inner liner layer may include crystalline regions and amorphous regions.

본 발명의 다른 일 실시예에 따른 압력용기는, 유체 수용을 위한 내부 수용공간을 구비하는 플라스틱 소재의 라이너와, 라이너의 외부를 둘러싸는 섬유보강층과, 라이너와 섬유보강층 사이에 위치하는 접착제층을 포함한다. 라이너는, 결정질 영역과 비결정질 영역을 포함하는 내부 라이너층과, 내부 라이너층의 외측에 위치하고 결정질 영역으로 구성된 외부 라이너층을 포함한다.A pressure vessel according to another embodiment of the present invention includes a liner made of plastic having an internal receiving space for accommodating fluid, a fiber-reinforced layer surrounding the outside of the liner, and an adhesive layer located between the liner and the fiber-reinforced layer. Includes. The liner includes an inner liner layer comprising crystalline regions and amorphous regions, and an outer liner layer located outside the inner liner layer and consisting of crystalline regions.

내부 라이너층은 표면 요철을 가질 수 있다. 외부 라이너층은 내부 라이너층의 표면 요철과 동일한 내측 표면 요철과, 접착제층과 접하는 외측 표면 요철을 가질 수 있다. 외부 라이너층은 불규칙한 두께를 가질 수 있다.The inner liner layer may have surface irregularities. The outer liner layer may have inner surface irregularities that are the same as the surface irregularities of the inner liner layer, and outer surface irregularities that are in contact with the adhesive layer. The outer liner layer may have an irregular thickness.

본 발명의 압력용기에 따르면, 라이너의 표면부에는 결정질 영역으로 이루어진 플라스틱만 존재하는 층이 형성될 수 있고, 이에 따라 라이너 내부에 충진된 고압 유체가 결정질 플라스틱 만으로 구성된 층에 막혀 누설율이 저감될 수 있다.According to the pressure vessel of the present invention, a layer containing only plastic composed of crystalline regions can be formed on the surface of the liner, and as a result, the high-pressure fluid filled inside the liner is blocked by the layer composed only of crystalline plastic, thereby reducing the leakage rate. You can.

또한, 접착제층에 의해 라이너와 섬유보강층이 기밀하게 부착될 수 있다. 이에 따라, 상기 라이너와 섬유보강층 사이에 간극이 발생하지 않아 상기 간극에 고압 유체가 유입되는 문제가 미연에 차단될 수 있다. Additionally, the liner and the fiber reinforcement layer can be airtightly attached by the adhesive layer. Accordingly, a gap does not occur between the liner and the fiber reinforcement layer, so the problem of high-pressure fluid flowing into the gap can be prevented in advance.

또한, 상기 라이너 내부에 충진된 고압 유체가 접착체층 및 섬유보강층에 의해 완전히 차단되어 가스의 누설이 원천적으로 제한될 수 있고, 이에 따라 안전성이 우수한 압력용기가 제공될 수 있다. 더욱이, 접착제층에 의해 라이너와 섬유보강층의 접착력이 향상되어 내구성이 우수한 압력용기가 제공될 수 있고, 제품 사용 수명이 연장되는 효과가 있다.In addition, the high-pressure fluid filled inside the liner is completely blocked by the adhesive layer and the fiber-reinforced layer, so that gas leakage can be fundamentally limited, and thus a pressure vessel with excellent safety can be provided. Furthermore, the adhesion between the liner and the fiber reinforcement layer is improved by the adhesive layer, thereby providing a highly durable pressure container and extending the product's service life.

도 1은 본 발명의 일 실시상태에 따른 압력용기의 부분 단면도이다.
도 2는 본 발명의 일 실시상태에 따른 압력용기의 절개 사시도이다.1 is a partial cross-sectional view of a pressure vessel according to an exemplary embodiment of the present invention.
Figure 2 is a cut-away perspective view of a pressure vessel according to an exemplary embodiment of the present invention.

이하, 본 발명에 대하여 상세하게 설명한다.Hereinafter, the present invention will be described in detail.

본 발명은 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있는 바, 그 실시상태들을 본문에 상세하게 설명하고자 한다. 그러나 이는 본 발명을 특정한 개시형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. 본 발명에서 구성요소를 지칭하는 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로 사용된다. 본 출원에서 사용한 용어는 단지 특정한 실시예를 설명하기 위해 사용된 것으로, 본 발명을 한정하려는 의도가 아니다. 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. Since the present invention can make various changes and take various forms, its embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. In the present invention, terms referring to components are used for the purpose of distinguishing one component from another component. The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

본 발명의 일 실시상태는, (1) 고압 유체가 수용되는 내부 수용공간을 구비하고, 결정질 영역과 비결정질 영역으로 이루어진 플라스틱을 포함하는 라이너를 제조하는 단계; (2) 상기 라이너의 표면에서 플라스틱의 비결정질 영역을 제거하여 표면요철을 형성하는 단계; 및 (3) 상기 표면요철이 형성된 라이너 외부에 섬유보강층을 형성하는 단계;를 포함하는, 압력용기의 제조방법을 제공한다.One embodiment of the present invention includes the steps of (1) manufacturing a liner including a plastic having an internal accommodation space in which a high-pressure fluid is accommodated and consisting of a crystalline region and an amorphous region; (2) forming surface irregularities by removing an amorphous region of plastic from the surface of the liner; and (3) forming a fiber-reinforced layer on the outside of the liner on which the surface irregularities are formed.

본 명세서에서 압력용기는 내부에 대기압을 초과하는 압력의 기체 또는 액체를 저장하는 용기를 의미한다. 이러한 압력용기는 액화 석유가스(LPG), 압축 천연가스(CNG), 경질 탄화수소(메탄, 프로판, 부탄) 및 수소가스 등을 포함하는 각종 고압 유체들을 저장할 수 있고, 구체적으로 연료로서 수소를 저장하는 수소 저장 탱크일 수 있다. 상기 압력용기를 구성하는 라이너는 중공을 갖는 원통형 또는 비원통형일 수 있다. 구체적으로, 상기 라이너에는 고압유체가 수용되는 타원형의 단면을 갖는 내부 수용공간이 구비되고, 원통형으로 이루어질 수 있다.In this specification, a pressure vessel refers to a vessel that stores gas or liquid at a pressure exceeding atmospheric pressure. These pressure vessels can store various high-pressure fluids including liquefied petroleum gas (LPG), compressed natural gas (CNG), light hydrocarbons (methane, propane, butane), and hydrogen gas, and specifically store hydrogen as a fuel. It may be a hydrogen storage tank. The liner constituting the pressure vessel may be hollow cylindrical or non-cylindrical. Specifically, the liner is provided with an internal accommodation space having an oval cross-section that accommodates high-pressure fluid, and may be cylindrical.

이하, 본 발명의 일 실시상태에 대하여 단계별로 상세히 설명한다. Hereinafter, an embodiment of the present invention will be described in detail step by step.

(1) 라이너 제조 단계(1) Liner manufacturing steps

이 단계는 고압 유체가 수용되는 내부 수용공간을 구비하고, 결정질 영역과 비결정질 영역으로 이루어진 플라스틱을 포함하는 라이너를 제조하는 단계이다.This step is to manufacture a liner that has an internal accommodation space that accommodates high-pressure fluid and includes plastic consisting of a crystalline region and an amorphous region.

상기 라이너를 제조하는 방법으로는 통상의 공지된 플라스틱 용기 성형 방법이 제한 없이 사용될 수 있다. 예를 들면, 블로우성형, 사출성형 등이 사용될 수 있으나, 이에 한정되지 않는다. 구체적으로, 블로우 성형이 사용될 경우, 상기 (1) 단계는 용융상태의 플라스틱 소재로 라이너 성형물을 제조하는 단계; 및 상기 라이너 성형물을 냉각하는 단계;를 포함할 수 있다. 여기서, 블로우 성형이란, 중공의 플라스틱 성형품을 얻기 위한 성형기술로서, 압출이나 사출에 의해 튜브상으로 예비 성형을 하고, 이것을 금형에 끼워서 내부로 공기를 불어 넣어 부풀게 한 다음 냉각 고화시켜 특정한 형태의 고형물을 만드는 것이다.As a method of manufacturing the liner, any known plastic container molding method can be used without limitation. For example, blow molding, injection molding, etc. may be used, but are not limited thereto. Specifically, when blow molding is used, step (1) includes manufacturing a liner molding from a molten plastic material; and cooling the liner molding. Here, blow molding is a molding technology to obtain a hollow plastic molded product. It is preformed into a tube shape by extrusion or injection, inserted into a mold, blown into the mold to inflate it, and then cooled and solidified to form a solid of a specific shape. is to create.

상기 라이너 성형물의 냉각과정에서 냉각속도에 따라 상기 플라스틱 소재의 결정화(crystallinity) 정도가 달라질 수 있다. 구체적으로, 상기 냉각속도는 15℃/min 이상 25℃/min 이하일 수 있고, 이 경우 라이너 성형물을 구성하는 플라스틱 소재의 일부는 결정화되고 나머지는 결정화되지 않아 본 발명에서 원하는 결정화 정도를 가지는 플라스틱, 즉 결정질 영역과 비결정질 영역으로 이루어진 플라스틱을 포함하는 라이너가 제조될 수 있다.During the cooling process of the liner molded product, the degree of crystallinity of the plastic material may vary depending on the cooling rate. Specifically, the cooling rate may be 15°C/min or more and 25°C/min or less. In this case, part of the plastic material constituting the liner molding is crystallized and the rest is not crystallized, thereby producing a plastic having the desired degree of crystallization in the present invention, that is, A liner can be manufactured comprising a plastic comprised of crystalline regions and amorphous regions.

본 발명의 일 실시상태에 따르면, 상기 플라스틱은 폴리올레핀계 수지, 폴리아미드계 수지 및 이들의 복합수지로 이루어진 군에서 선택될 수 있으며, 예를 들어 고밀도폴리에틸렌((high density polyethylene, HDPE), 폴리아미드(PA6) 등이 사용될 수 있으나, 이에 한정되지 않는다. 이러한 플라스틱 소재의 라이너는 금속 소재의 라이너에 비해 가볍고 내부식성이 우수한 장점을 가지고 있다. According to one embodiment of the present invention, the plastic may be selected from the group consisting of polyolefin-based resins, polyamide-based resins, and composite resins thereof, for example, high density polyethylene (HDPE), polyamide (PA6), etc. may be used, but are not limited to this.Liners made of such plastic materials have the advantage of being lighter and having excellent corrosion resistance compared to liners made of metal materials.

본 발명의 일 실시상태에 따르면, 상기 플라스틱은 고밀도폴리에틸렌(high density polyethylene, HDPE)일 수 있다. 상기 HDPE는 라이너 소재로 사용될 경우 강도가 강하며, 경제적이고, 성형이 매우 용이한 재료이다.According to one embodiment of the present invention, the plastic may be high density polyethylene (HDPE). When used as a liner material, HDPE is a material that is strong, economical, and very easy to form.

(2) 표면요철 형성 단계(2) Surface irregularity formation step

이 단계는 상기 (1) 단계에 따라 제조된 라이너의 표면에서 플라스틱의 비결정질 영역을 제거하여 표면요철을 형성하는 단계이다. 도 1 및 2를 살펴보면, 본 발명의 일 실시상태에 따른 표면요철(113)을 갖는 라이너(110)를 포함하는 압력용기의 부분 단면도 및 개략 절개 사시도가 각각 도시되어 있다.This step is a step of forming surface irregularities by removing the amorphous area of the plastic from the surface of the liner manufactured according to step (1) above. 1 and 2, a partial cross-sectional view and a schematic cut-away perspective view of a pressure vessel including a liner 110 with surface irregularities 113 according to an exemplary embodiment of the present invention are shown, respectively.

본 발명의 일 실시상태에 따르면, 상기 (2) 단계는 산성 용액을 사용하여 상기 라이너 표면에서 플라스틱의 비결정질 영역을 제거하는 단계를 포함할 수 있다. 구체적으로, 이 단계는 상기 라이너의 표면에 산성 용액을 도포하는 단계; 및 상기 산성 용액에 용해된 플라스틱의 비결정질 영역을 라이너로부터 제거하는 단계;를 포함할 수 있다. 상기 도포 방법으로서는 통상의 공지된 방법이 제한 없이 사용될 수 있으며, 예를 들어 스프레이 분사방식, 브러쉬 방식 등이 사용될 수 있으나, 이에 한정되지 않는다. 그리고, 상기 비결정질 영역의 제거에는 물, 에탄올 및 이들의 혼합액이 사용될 수 있으며, 비결정질 영역의 제거 이후 건조단계가 추가로 포함될 수 있다. 이러한 과정을 거쳐, 플라스틱의 비결정질 영역이 제거되면 라이너(110)의 표면에는 다수개의 홈이 생성될 수 있고, 라이너 외주면에 표면요철이 형성되어 표면이 거칠어진다. According to one embodiment of the present invention, step (2) may include removing the amorphous region of the plastic from the surface of the liner using an acidic solution. Specifically, this step includes applying an acidic solution to the surface of the liner; and removing the amorphous region of the plastic dissolved in the acidic solution from the liner. As the application method, any known method may be used without limitation, for example, a spray method or a brush method may be used, but is not limited thereto. In addition, water, ethanol, and a mixture thereof may be used to remove the amorphous region, and a drying step may be additionally included after removal of the amorphous region. Through this process, when the amorphous region of the plastic is removed, multiple grooves may be created on the surface of the liner 110, and surface irregularities are formed on the outer peripheral surface of the liner, making the surface rough.

본 발명의 일 실시상태에 따르면, 상기 산성 용액이 금속염계 산 용액일 수 있다. 구체적으로, 상기 금속염계 산 용액은 크롬산 용액일 수 있으며, 상기 크롬산 용액의 농도는 0.1 ~ 0.3M 일 수 있다. 이러한 산성 용액을 사용할 경우, 라이너 표면에서 플라스틱의 비결정질 영역 만을 효과적으로 제거할 수 있다.According to one embodiment of the present invention, the acidic solution may be a metal salt-based acid solution. Specifically, the metal salt-based acid solution may be a chromic acid solution, and the concentration of the chromic acid solution may be 0.1 to 0.3 M. When using these acidic solutions, only the amorphous areas of plastic can be effectively removed from the liner surface.

(3) 섬유보강층 형성단계(3) Fiber reinforcement layer formation step

이 단계는 상기 (2) 단계에 따라 표면요철이 형성된 라이너 외부에 섬유보강층을 형성하는 단계이다. This step is a step of forming a fiber reinforcement layer on the outside of the liner on which the surface irregularities are formed according to step (2) above.

본 발명의 일 실시상태에 따르면, 상기 섬유보강층은 유리섬유, 탄소섬유 및 아라미드 섬유로 이루어진 군에서 선택된 적어도 1종의 보강섬유를 포함할 수 있다. 상기 섬유보강층은 라이너를 보강하는 역할을 하는 것으로, 상기 보강섬유가 라이너의 외부를 둘러싸도록 형성될 수 있다.According to one embodiment of the present invention, the fiber reinforcement layer may include at least one type of reinforcement fiber selected from the group consisting of glass fiber, carbon fiber, and aramid fiber. The fiber reinforcement layer serves to reinforce the liner, and the reinforcement fibers may be formed to surround the outside of the liner.

본 발명의 일 실시상태에 따르면, 상기 섬유보강층은 열경화성 수지에 함침되거나 또는 함침되지 않은 필라멘트 형태의 보강섬유로부터 형성될 수 있다. 여기서, 필라멘트란, 연속된 섬유, 즉 단면 지름에 비해 길이가 무한히 긴 섬유를 의미한다. 그리고, 상기 섬유보강층 형성시 섬유 필라멘트의 권취 방향에는 제한이 없으며, 바람직하게 라이너의 길이 방향을 따라 권취될 수 있고, 다수개의 층을 이루도록 권취과정이 반복 실시될 수 있다. 도 1에는 본 발명의 일 실시상태에 따라 섬유보강층이 하나의 층으로 권취된 상태가 도시되어 있으나, 이에 한정되지 않는다.According to one embodiment of the present invention, the fiber reinforcement layer may be formed from reinforcing fibers in the form of filaments that are impregnated or not impregnated with a thermosetting resin. Here, filament refers to a continuous fiber, that is, a fiber whose length is infinitely long compared to the cross-sectional diameter. In addition, there is no limit to the winding direction of the fiber filament when forming the fiber reinforcement layer. Preferably, the fiber filament can be wound along the longitudinal direction of the liner, and the winding process can be repeated to form multiple layers. Figure 1 shows a state in which the fiber reinforcement layer is wound as one layer according to an exemplary embodiment of the present invention, but the present invention is not limited thereto.

본 발명의 일 실시상태에 따르면, 상기 열경화성 수지는 에폭시 수지, 폴리에스테르, 비닐 에스테르, 페놀성 화합물, 폴리우레탄 및 폴리디사이클로펜타디엔으로 이루어진 군에서 선택되는 적어도 1종을 포함할 수 있고, 구체적으로 에폭시 수지가 사용될 수 있다.According to one embodiment of the present invention, the thermosetting resin may include at least one selected from the group consisting of epoxy resin, polyester, vinyl ester, phenolic compound, polyurethane, and polydicyclopentadiene, and specific Epoxy resin can be used.

이 밖에, 본 발명의 일 실시상태에 따르면, 상기 (2)단계에 따라 표면요철이 형성된 라이너의 외주면에 접착제를 도포하여 접착제층을 형성하는 단계를 더 포함할 수 있다.In addition, according to one embodiment of the present invention, the step of forming an adhesive layer by applying an adhesive to the outer peripheral surface of the liner on which the surface irregularities are formed according to step (2) may be further included.

본 발명의 일 실시상태에 따르면, 상기 접착제는 에폭시 수지, 폴리에스테르, 비닐에스테르, 페놀성 화합물, 폴리우레탄 및 폴리디사이클로펜타디엔으로 이루어진 군에서 선택된 적어도 1종을 포함할 수 있다. 구체적인 예로, 상기 에폭시 수지는 비스페놀 A형 에폭시, 비스페놀 F형 에폭시, 노볼락 에폭시, 난연성 에폭시, 환형지방족 에폭시 및 고무 변성 에폭시 등을 포함할 수 있으나, 이에 한정되지 않는다. According to one embodiment of the present invention, the adhesive may include at least one selected from the group consisting of epoxy resin, polyester, vinyl ester, phenolic compound, polyurethane, and polydicyclopentadiene. As a specific example, the epoxy resin may include, but is not limited to, bisphenol A-type epoxy, bisphenol F-type epoxy, novolac epoxy, flame retardant epoxy, cyclic aliphatic epoxy, and rubber-modified epoxy.

상기 접착제층은 라이너의 표면에서 플라스틱의 비결정질 영역을 제거함으로써 표면이 거칠어진 상태, 즉 표면요철이 형성된 라이너의 외주면에 도포되므로, 그 접착력이 증가될 수 있다. 구체적으로, 상기 도포과정에서 상기 요철의 음각부분에 접착제가 매립되면서 접착제층이 형성되므로, 라이너 외주면과 접착제층이 접하는 표면적이 증가되고, 이에 따라 접착력이 증가될 수 있다. 더욱이, 상기 도포과정에서 접착체층이 라이너 외주면에 공극없이 기밀하게 말착되기 때문에, 라이너를 투과해 나온 고압 유체가 머무를 공간이 없고, 상기 접착제층이 라이너의 외주면을 차단해주어 고압 유체가 압력용기 외부로 누설되는 것을 막아줄 수 있다.Since the adhesive layer is applied to the outer peripheral surface of the liner in a roughened state, that is, surface irregularities formed by removing the amorphous region of plastic from the surface of the liner, the adhesive strength can be increased. Specifically, during the application process, an adhesive layer is formed as the adhesive is embedded in the concave and concave portion, so the surface area in contact between the outer peripheral surface of the liner and the adhesive layer increases, and thus the adhesive force can be increased. Moreover, since the adhesive layer is airtightly adhered to the outer peripheral surface of the liner without any voids during the application process, there is no space for the high-pressure fluid passing through the liner to stay, and the adhesive layer blocks the outer peripheral surface of the liner, preventing high-pressure fluid from flowing out of the pressure vessel. It can prevent leakage.

본 발명의 다른 실시상태는, 상기 제조방법에 따라 제조된 압력용기를 제공한다. 구체적으로, 도 1에는 본 발명의 일 실시상태에 따른 압력용기의 부분 단면도가 도시되어 있고, 도 2에는 본 발명의 일 실시상태에 따른 압력용기의 절개 사시도가 도시되어 있다.Another embodiment of the present invention provides a pressure vessel manufactured according to the above manufacturing method. Specifically, Figure 1 shows a partial cross-sectional view of a pressure vessel according to an exemplary embodiment of the present invention, and Figure 2 shows a cut-away perspective view of a pressure vessel according to an exemplary embodiment of the present invention.

본 발명의 일 실시상태에 따른 압력용기(100)는, 고압 유체가 수용되는 내부 수용공간을 구비하는 플라스틱 소재의 라이너(110);및 상기 라이너의 외부를 둘러싸고 있는 섬유보강층(130);을 포함할 수 있고, 상기 라이너(110)는 결정질 영역과 비결정질 영역으로 이루어진 플라스틱을 포함할 수 있으며, 상기 라이너(110)의 표면에 존재하는 플라스틱의 비결정질 영역의 제거에 의해 상기 라이너(110)의 외주면이 요철(113) 형상을 가질 수 있다.The pressure vessel 100 according to an embodiment of the present invention includes a liner 110 made of plastic having an internal receiving space in which high-pressure fluid is accommodated; and a fiber reinforcement layer 130 surrounding the outside of the liner. The liner 110 may include plastic composed of a crystalline region and an amorphous region, and the outer peripheral surface of the liner 110 may be formed by removing the amorphous region of the plastic present on the surface of the liner 110. It may have an uneven (113) shape.

상기한 바와 같이, 상기 요철(113)은 라이너(110) 표면에 존재하는 비결정질 플라스틱의 제거에 의해 상기 라이너(110)의 외주면에 형성되는 것으로, 라이너(110)의 외곽 부분에는 결정질 영역으로만 구성된 플라스틱이 존재하는 층(112)(이하, "외부 라이너층"이라 함)이 존재할 수 있고, 상기 외부 라이너층(112)과 라이너(110)의 내피 사이에는 결정질 영역과 비결정질 영역으로 이루어진 플라스틱이 포함된 층(111)(이하, "내부 라이너층"이라 함)이 존재할 수 있다. As described above, the unevenness 113 is formed on the outer peripheral surface of the liner 110 by removing the amorphous plastic present on the surface of the liner 110, and the outer portion of the liner 110 consists only of a crystalline region. A layer 112 containing plastic (hereinafter referred to as “outer liner layer”) may exist, and plastic consisting of a crystalline region and an amorphous region may be present between the outer liner layer 112 and the inner skin of the liner 110. A layer 111 (hereinafter referred to as “inner liner layer”) may be present.

도면에 나타나 있듯이, 내부 라이너층(111)은 표면 요철을 가지며, 내부 라이너층(111)을 덮는 외부 라이너층(112)은 내측 표면과 외측 표면 모두에 각자의 표면 요철을 가진다. 이때 외부 라이너층(112)의 내측 표면은 내부 라이너층(111)의 표면 요철과 동일하며, 외부 라이너층(112)은 내측 표면 요철에 의해 내부 라이너층(111)과의 접합력을 높일 수 있다.As shown in the figure, the inner liner layer 111 has surface irregularities, and the outer liner layer 112 covering the inner liner layer 111 has its own surface irregularities on both the inner and outer surfaces. At this time, the inner surface of the outer liner layer 112 is the same as the surface irregularities of the inner liner layer 111, and the outer liner layer 112 can increase bonding strength with the inner liner layer 111 due to the inner surface irregularities.

이러한 구조를 갖는 라이너(110) 내부에 고압 유체가 충진될 경우, 결정질 영역으로 이루어진 플라스틱으로만 구성된 외부 라이너층(112)에 막혀 누설율이 저감될 수 있다. 이때, 상기 외부 라이너층(112)의 두께는 불균일할 수 있다.When a high-pressure fluid is filled inside the liner 110 having this structure, the leakage rate may be reduced due to blockage in the outer liner layer 112 made only of plastic with a crystalline region. At this time, the thickness of the outer liner layer 112 may be non-uniform.

한편, 상기 라이너(110)와 섬유보강층(130) 사이에는 접착제층(120)이 더 포함될 수 있다. 구체적으로, 도 1 및 도 2에는 본 발명의 일 실시상태에 따라 접착제층(120)이 포함된 압력용기(100)의 부분 단면도 및 개략 절개 사시도가 각각 도시되어 있다. 상기 접착제층(120)에 관한 구체적인 내용은 상기에서 상술한 내용을 포함한다. Meanwhile, an adhesive layer 120 may be further included between the liner 110 and the fiber reinforcement layer 130. Specifically, Figures 1 and 2 show a partial cross-sectional view and a schematic perspective view of a pressure vessel 100 including an adhesive layer 120 according to an exemplary embodiment of the present invention, respectively. Specific details regarding the adhesive layer 120 include the details described above.

상기 도 1 및 도 2에 도시된 본 발명의 일 실시상태에 따른 압력용기(100)는, 고압유체와 접하고, 결정질 영역과 비결정질 영역으로 이루어진 플라스틱을 포함하는 내부 라이너층(111); 상기 내부 라이너층(111)의 외부에 존재하고, 결정질 영역으로 이루어진 플라스틱으로 구성되며 요철(113) 형상을 갖는 외부 라이너층(112); 상기 외부 라이너층(112) 외부에 도포된 접착제층(120); 및 상기 접착제층(120)의 외부에 형성된 섬유보강층(130);을 포함하는 압력용기(100)가 도시되어 있다.The pressure vessel 100 according to an exemplary embodiment of the present invention shown in FIGS. 1 and 2 includes an inner liner layer 111 that is in contact with a high-pressure fluid and includes plastic composed of a crystalline region and an amorphous region; an outer liner layer 112 that exists outside the inner liner layer 111, is made of plastic with a crystalline region, and has a concavo-convex shape (113); an adhesive layer 120 applied to the outside of the outer liner layer 112; A pressure vessel 100 including a fiber reinforcement layer 130 formed on the outside of the adhesive layer 120 is shown.

요철에 의해 표면적인 증가된 라이너 구조는 섬유보강층의 와인딩 이후 진행되는 고온 경화공정에서 취약할 수 있으나, 일 실시예에 따른 압력용기(100)에서 외부 라이너층(112)은 결정질 영역으로 구성되어 있으므로 요철의 손상 없이 구조 유지가 가능하다. 따라서, 압력용기(100)는 라이너(110)의 기계적 강도를 높여 섬유보강층(130)의 무게를 더욱 잘 견딜 수 있도록 한다.The liner structure with an increased surface area due to irregularities may be vulnerable in the high temperature curing process that occurs after winding of the fiber reinforcement layer, but in the pressure vessel 100 according to one embodiment, the outer liner layer 112 is composed of a crystalline region. The structure can be maintained without damage to the irregularities. Accordingly, the pressure vessel 100 increases the mechanical strength of the liner 110 to better withstand the weight of the fiber reinforcement layer 130.

이상과 같이, 본 발명은 비록 한정된 실시상태와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술 사상과 아래에 기재될 특허청구범위의 균등 범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.As described above, although the present invention has been described with limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention can be understood by those skilled in the art in the technical field to which the present invention belongs. Of course, various modifications and variations are possible within the scope of equivalency of the patent claims described in .

110: 라이너
111: 내부 라이너층
112: 외부 라이너층
113: 표면요철
120: 접착층
130: 섬유보강층110: Liner
111: inner liner layer
112: outer liner layer
113: Surface irregularities
120: Adhesive layer
130: Fiber reinforcement layer

Claims (7)

유체 수용을 위한 내부 수용공간을 구비하는 플라스틱 소재의 라이너;
상기 라이너의 외부를 둘러싸는 섬유보강층; 및
상기 라이너와 상기 섬유보강층 사이에 위치하는 접착제층을 포함하고,
상기 라이너는,
결정질 영역과 비결정질 영역을 포함하며, 표면 요철을 가지는 내부 라이너층;
결정질 영역으로 구성되며, 상기 내부 라이너층의 표면 요철과 동일한 내측 표면 요철 및 상기 접착제층과 접하는 외측 표면 요철을 가지는 외부 라이너층을 포함하고,
상기 외부 라이너층은 불규칙한 두께를 가지는 압력용기.A liner made of plastic and having an internal receiving space for receiving fluid;
A fiber reinforcement layer surrounding the outside of the liner; and
Comprising an adhesive layer located between the liner and the fiber reinforcement layer,
The liner is,
an inner liner layer including a crystalline region and an amorphous region and having surface irregularities;
An outer liner layer composed of crystalline regions and having inner surface irregularities identical to the surface irregularities of the inner liner layer and outer surface irregularities in contact with the adhesive layer,
A pressure vessel wherein the outer liner layer has an irregular thickness. 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete
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CN101724166A (en) * 2008-10-24 2010-06-09 江南大学 Preparation method of sanitary ware with super-hydrophobicity surface
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CN101724166A (en) * 2008-10-24 2010-06-09 江南大学 Preparation method of sanitary ware with super-hydrophobicity surface
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