KR100245384B1 - Method of manufacturing welding can - Google Patents
Method of manufacturing welding can Download PDFInfo
- Publication number
- KR100245384B1 KR100245384B1 KR1019970009234A KR19970009234A KR100245384B1 KR 100245384 B1 KR100245384 B1 KR 100245384B1 KR 1019970009234 A KR1019970009234 A KR 1019970009234A KR 19970009234 A KR19970009234 A KR 19970009234A KR 100245384 B1 KR100245384 B1 KR 100245384B1
- Authority
- KR
- South Korea
- Prior art keywords
- welding
- polyester resin
- manufacturing
- corrosion resistance
- resin film
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
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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
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
- B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/12—Cans, casks, barrels, or drums
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Laminated Bodies (AREA)
Abstract
본 발명은 내식성이 우수한 용접캔 및 그 제조방법에 관한 것으로 특히 용접부위의 내외면에 내식성 및 내약품성이 우수한 폴리에스테르 수지필름이 피복되어 있는 용접캔 및 그 제조방법에 관한 것이다.The present invention relates to a welding can excellent in corrosion resistance and a method for manufacturing the same, and more particularly, to a welding can coated with a polyester resin film having excellent corrosion resistance and chemical resistance on the inner and outer surfaces of a welded portion and a method for manufacturing the same.
본 발명의 내식성이 우수한 용접캔의 제조방법은 주석도금강판에 내면 도장 및 인쇄공정을 거친다음 용접제관하여 캔의 몸체를 제조하는 단계와, 상기 캔몸체의 용접부위 내면, 또는 내,외면에 띠모양의 폴리에스테르 수지를 접착하는 단계와, 상기 용접부위에 폴리에스테르 수지가 접착된 캔몸체를 190-210℃로 가열한 다음 급냉하는 단계와, 상기 급냉된 캔몸체의 하부를 주석도금 강판으로 제조한 바닥부분으로 체결하는 단계로 구성된다.The method of manufacturing a welding can excellent in corrosion resistance according to the present invention comprises the steps of manufacturing the body of the can by subjecting it to a tin-plated steel sheet after the inner coating and printing process, and welding the inner surface of the can body, or an inner or outer surface thereof. Bonding a polyester resin of a shape, heating the can body to which the polyester resin is adhered to the welding part at 190-210 ° C., and then quenching the lower part of the quenched can body made of tin-plated steel sheet. It consists of fastening to the bottom part.
또한 본발명의 내식성이 우수한 용접캔은 용접캔몸체의 내면이 도표로 포장되어 있으며 용접부위의 내면 및/또는 외면에 대모양의 폴리에스테르 필름이 피복되어 있는 것을 특징으로 한다.In addition, the welding can excellent in corrosion resistance of the present invention is characterized in that the inner surface of the welding can body is packaged in a diagram and a large polyester film is coated on the inner surface and / or outer surface of the welding portion.
Description
본 발명은 내식성이 우수한 용접캔 및 그 제조방법에 관한 것으로 특히 용접부위의 내외면에 내식성 및 내약품성이 우수한 폴리에스테르 수지필름이 피복되어 있는 용접캔 및 그 제조방법에 관한 것이다.The present invention relates to a welding can excellent in corrosion resistance and a method for manufacturing the same, and more particularly, to a welding can coated with a polyester resin film having excellent corrosion resistance and chemical resistance on the inner and outer surfaces of a welded portion and a method for manufacturing the same.
용접캔의 소재는 주로 주석 도금 강판 및 주석도금강판에 폴리에스테르 수지필름을 피복한 강판이 사용되고 있는데 상기 주석도금판을 사용하여 용접켄을 제조하는 경우 제관시의 용접성 확보를 위해서 용접이 될 부위에는 도장처리를 하지 않고 그 나머지 부위에만 띠모양으로 도장을 한다음 용접제관 하고 다시 용접부위에 내식성 및 내약품성을 향상시키기 위해 별도의 도장처리를 행하고 있으며, 상기 폴리에스테르 수지필름 피복금속판을 사용하여 용접캔을 제조할 경우도 마찬가지로 용접제관 후에 용접부위만 별도의 도장처리를 행하고 있다. 이때 사용되는 도장처리는 제관공정의 생산성을 위해 석판의 도장처리와 다르게 속건성의 도료가 사용되기 때문에 용접부와 이외의 부분이 서로 다른 물성을 가지게 되고 용접부위의 도료층이 내용물에 의해 집중적으로 부식을 당할 수 있어 용접캔의 내용물에 대한 내식성에 있어서 가장큰 취약점이 되어 왔다. 따라서 폴리에스테르 수지피복 금속판으로 제조된 용접캔의 경우 폴리에스테르 수지필름이 가지고 있는 우수한 내약품성 및 식품 등에 대한 보존성에도 불구하고 제관후의 용접부위에 행하는 도장처리로 인하여 일반도장관과 같은 정도의 용도로 밖에 사용되지 못하는 문제가 있었으며, 용접부위에 대한 도장처리시 도료의 경화를 위하여 별도의 가열공정(오븐)이 필수적으로 행하여지는바 이 과정에서 환경에 유해한 유기용매가 다량으로 배출될 뿐만 아니라, 오븐의 온도를 유지하기 위한 에너지 손실이 크게 발생하여 제조경비의 상승은 물론 지구환경을 오염시키는 문제를 가지고 있다.The welding can is mainly made of a tin plated steel sheet and a tin plated steel sheet coated with a polyester resin film. In the case of manufacturing a welding ken using the tin plated steel sheet, the welding can is used to secure weldability at the time of manufacturing. After the coating is done in the shape of a band only to the remaining parts without coating, welding can be made and a separate coating treatment is performed to improve corrosion resistance and chemical resistance at the welded area, and the welding can is made using the polyester resin film-coated metal plate. Similarly, in the case of manufacturing the same, only the welded part is subjected to a separate coating process after welding. In this case, the coating process used is fast drying paint differently from the slab coating process for productivity of the steel making process. Therefore, the welded part and the other part have different physical properties, and the coating layer of the welded part is intensively corroded by the contents. It can be vulnerable and has been the biggest weakness in the corrosion resistance of the contents of the welding can. Therefore, in the case of welding cans made of polyester resin-coated metal sheets, despite the excellent chemical resistance of the polyester resin film and the preservation of food, the coating can be carried out on the welded part after the tube is only used for the same degree as the general coating pipe. There was a problem that can not be used, and a separate heating process (oven) is essential for the curing of the paint during the coating treatment of the welding site, in which a large amount of organic solvent harmful to the environment is discharged, and the temperature of the oven There is a problem that the energy loss to maintain a large generation occurs, as well as the increase in manufacturing costs and pollute the global environment.
본 발명은 상기한 문제점을 해결하기 위하여 안출한 것으로서 우수한 내식성, 내약품성 및 내용물에 대한 보관성이 우수하며 제조공정에서 환경에 유해한 물질의 배출을 억제할 뿐만 아니라 제조경비의 절감을 기할 수 있는 환경친화적 특성이 우수한 용접캔 및 그 제조방법을 제공하는데 그 목적이 있다. 본 발명의 또하나의 목적은 용접부위의 내식성 및 내화학성을 대폭향상시킴으로써, 종래에는 용접부위의 내식성 결여로 적용하지 못했던 분야, 즉 부식성이 강한 각종페인트 관 및 기름류, 고도의 내식성이 요구되는 화학약품의 저장용기 등의 분야에 적용할 수 있는 금속관을 제공하는데 있다.The present invention has been made in order to solve the above problems, excellent corrosion resistance, chemical resistance and storage of the contents and the environment that can not only reduce the emission of harmful substances to the environment in the manufacturing process but also reduce the manufacturing cost It is an object of the present invention to provide a welding can excellent in its friendly characteristics and a method of manufacturing the same. Another object of the present invention is to greatly improve the corrosion resistance and chemical resistance of the welded areas, which is not applicable to the conventional lack of corrosion resistance of the welded areas, that is, various corrosion resistant paint pipes and oils, chemicals requiring high corrosion resistance An object of the present invention is to provide a metal tube that can be applied to fields such as storage containers for chemicals.
상기 목적을 달성하기 위하여 본 발명은 주석도금강판에 내면 도장 및 인쇄공정을 거친다음 용접제관하여 캔의 몸체를 제조하는 단계와, 캔몸체의 용접부위 내면 또는 내,외면에 띠모양의 폴리에스테르 수지를 접착롤을 이용하여 접착하는 단계와, 상기 폴리에스테르 수지가 접착된 캔몸체를 200℃로 가열한다음 급냉하는 단계와, 상기 급냉된 캔몸체하부를 주석도금강판으로 제조한 바닥부분으로 체결하는 단계로 구성되는 것을 특징으로 하는 내식성이 우수한 용접캔의 제조방법을 제공한다.In order to achieve the above object, the present invention comprises the steps of manufacturing the body of the can by welding and then the inner surface coating and printing process on the tin-plated steel sheet, and the band-shaped polyester resin on the inner surface or the inner, outer surface of the welding portion of the can body The step of adhering by using an adhesive roll, and heating the can body to which the polyester resin is bonded to 200 ℃ and then quenching, and fastening the lower part of the quenched can body to the bottom portion made of tin plated steel sheet It provides a method of manufacturing a welding can excellent in corrosion resistance characterized in that it comprises a step.
또한 본 발명은 주석도금 강판을 170-190℃로 가열한 다음 접착제가 도포된 띠모양의 폴리에스테르 수지필름을 접착시키어서 폴리에스테르 수지필름 피복금속판을 제조하는 단계와, 상기 폴리에스테르 수지필름 피복금속판을 절단 및 용접하여 용접캔몸체를 제조하는 단계와, 상기 용접캔 몸체를 170-190℃로 가열하여 접착제가 도포된 폴리에스테르 수지필름을 용접부위 내면 또는 내,외면에 접착하는 단계와, 상기 폴리에스테르가 접착된 용접캔 몸체를 210-230℃로 가열한 다음 급냉하는 단계와, 상기 급냉된 용접캔 몸체의 하부를 폴리에스테르 수지필름이 피복된 금속판으로 제조된 바닥부분으로 체결하는 단계로 구성되는 것을 특징으로 하는 내식성이 우수한 용접관의 제조방법을 제공한다.In another aspect, the present invention is to heat the tin-plated steel sheet to 170-190 ℃ and then to bond the band-shaped polyester resin film coated with an adhesive to prepare a polyester resin film coating metal plate, and the polyester resin film coating metal plate Manufacturing a welding can body by cutting and welding the method, and heating the welding can body to 170-190 ° C. to bond a polyester resin film coated with an adhesive to an inner surface, an inner surface, or an outer surface of a welding site, and the poly Heating and then quenching the weld-bonded weld can body to 210-230 ° C. and fastening the lower portion of the quenched weld can body to a bottom portion made of a metal plate coated with a polyester resin film. It provides a method for producing a welded tube excellent in corrosion resistance.
또한 본발명은 내면이 도장되어 있고 용접부위에는 띠 형상의 폴리에스테르 수지필름이 내면 또는 내,외면에 접착되어 있는 것을 특징으로 하는 내식성이 우수한 용접캔을 제공한다.In another aspect, the present invention provides a welding can excellent in corrosion resistance, characterized in that the inner surface is coated and the welding portion is a band-shaped polyester resin film is adhered to the inner surface or the inner, outer surface.
이하에 본 발명을 상세히 설명한다.The present invention is described in detail below.
본 발명은 종래의 도장처리 대신에 용접공정을 거친 관을 일정온도로 가열한 다음, 띠 모양의 열접착성이 있는 폴리에스테르 수지필름 또는 열경화성 에폭시 수지계의 접착제가 도포된 폴리에스테르 수지 필름을 접착롤을 이용하여 피복시킴으로써 용접부위의 내식성 및 내 약품성, 식품보존성 등을 획기적으로 향상시키는 것을 특징으로한다.The present invention heats the tube after the welding process to a predetermined temperature instead of the conventional coating treatment, and then the adhesive roll of the polyester resin film coated with a band-shaped heat-adhesive polyester resin film or a thermosetting epoxy resin-based adhesive roll It is characterized by significantly improving the corrosion resistance, chemical resistance, food preservation and the like of the welded portion by coating using.
본 발명에 사용된 용접관용 표면처리 강판으로는 부착량 1.0 - 2.5g/m2의 주석도금강판 또는 니켈주석 이중도금강판, 박 주석 도금강판(LTS), 용접성이 있는 전해 크롬산 처리강판 등이며, 본발명에 또다른 용접부위의 내식성이 향상된 용접캐의 제조는 용접캔용 주석도금 강판 또는 니켈주석 이중도금강판의 용접제관 후에 용접된 캔을 160 - 200℃ 로 가열하고 용접부위에 열경화성 에폭시 수지계의 접착제가 도포된 띠모양의 폴리에스테르 수지필름을 접착롤을 이용하여 피복시킨 뒤 다시 180 - 200℃로 재가열하고 급랭 또는 서랭함으로써 이루어진다. 상기 열경화성 에폭시 수지계의 접착제로서는 비스페놀형 에폭시 수지, 레조르형 페놀수지, 아크릴 수지, 폴리에스테르 수지, 우레탄계 수지 중의 1 종 또는 2 종 이상의 혼합물로 이루어지는 접착제를 사용하였다. 열접착성이 있는 이축 연신 폴리에스테르 수지 필름을 피복시킬 경우 용접이 된 캔을 폴리에스테르 수지필름의 융점(Tm)-Tm+50℃로 가열한 다음 띠모양의 폴리에스테르 수지필름을 접착롤을 이용하여 접착시킨 다음 급랭함으로써 내식성 및 내약품성이 우수한 용접관을 제조하였다.The surface-treated steel sheet for weld tubes used in the present invention includes tin-plated steel sheets or nickel-tin double-plated steel sheets, thin tin-plated steel sheets (LTS), weldable electrolytic chromic acid-treated steel sheets, and the like having an adhesion amount of 1.0 to 2.5 g / m 2 . In the manufacture of a welded cavern with improved corrosion resistance of another welded portion, the welded can is heated to 160-200 ° C after welding canning of a tin-plated steel sheet or a nickel-tin double-plated steel sheet for welding cans, and a thermosetting epoxy resin adhesive is applied to the welded portions. The stripped polyester resin film is coated by using an adhesive roll, and then reheated to 180-200 ° C. and rapidly quenched or cooled. As the thermosetting epoxy resin adhesive, an adhesive made of one or a mixture of two or more of bisphenol-type epoxy resins, resor-type phenol resins, acrylic resins, polyester resins, and urethane resins was used. In the case of coating the biaxially stretched polyester resin film having heat adhesiveness, the welded can is heated to the melting point (Tm) -Tm + 50 ° C. of the polyester resin film, and then the band-shaped polyester resin film is coated with an adhesive roll. By welding, and then quenched to prepare a welded tube excellent in corrosion resistance and chemical resistance.
상기 도금강판으로 캔을 제관할 때 캔의 내면에 피복되는 필름은 투명 폴리에스테르 수지필름 및 화이트 폴리에스테르 수지필름 또는 화이트 도장처리가된 필름을 사용할 수 있으며 캔의 외면에 피복되는 필름은 화이트필름 또는 화이트도장 및 인쇄처리가 된 필름을 사용할 수가 있다. 열접착성이 있는 이축연신 폴리에스테르 수지필름은 폴리에틸렌 테레프탈레이트, 폴리에틸렌 나프탈레이트 등을 주쇄로 하며 공중합 성분으로 는 이소프탈산을 공중합 성분으로 한 폴리에스테르를 통상의 이축연신제조방법으로 제조하여 사용하였다. 또한 폴리에스테르 수지필름을 피복시키기 위한 접착롤은 캔의 모양에 따라 그 형태가 바뀌며 재질은 내열성이 우수한 실리콘계 고무 또는 우레탄계 고무 롤이 바람직하다.When manufacturing the can with the plated steel sheet, the film coated on the inner surface of the can may be a transparent polyester resin film, a white polyester resin film, or a white coated film. The film coated on the outer surface of the can may be a white film or White coated and printed film can be used. The biaxially stretched polyester resin film having heat adhesiveness was prepared by using a polyethylene terephthalate, polyethylene naphthalate, etc. as a main chain, and a polyester having isophthalic acid as a copolymerization component in a conventional biaxially stretching manufacturing method. In addition, the adhesive roll for coating the polyester resin film changes its shape according to the shape of the can, and the material is preferably a silicone rubber or urethane rubber roll having excellent heat resistance.
이하 실시예에서 본 발명에 대해 좀더 상세히 설명하고자 한다.Hereinafter, the present invention will be described in more detail.
(실시예 1)(Example 1)
냉간압연 강판에 전처리를 거친후 부착량 1.5 - 3.0g/m2의 주석도금 및 화학처리를 실시하였다. 위 금속판에 내면도장 및 외면 인쇄공정을 거쳐 용접제관을 한 뒤 곧이어 용접된 관을 180℃ 로 가열하여 접착제가 도포된 폭 0.5-3.0cm의 띠모양의 폴리에스테르 수지필름을 관의 용접부위 내면 또는 내,외면에 접착롤을 이용하여 접착시킨 후 다시 200℃로 재가열하고 급랭함으로써 용접부위에 폴리에스테르 수지필름이 접착된 용접관의 몸체를 제조하였다. 다시 전해 크롬산처리강판 또는 주석도금강판에 도장처리를 한 강판으로 제조한 캔의 바닥부분(End)을 체결(Seaming)하여 용접관을 제조하였다.After pre-treating the cold rolled steel sheet, tin plating and chemical treatment with an adhesion amount of 1.5-3.0 g / m 2 were performed. After welding the pipe through inner coating and outside printing process on the above metal plate, the welded tube is heated to 180 ℃ and the band-shaped polyester resin film 0.5-3.0cm wide with adhesive is applied to the inner surface of the pipe or The inner and outer surfaces were bonded using an adhesive roll, and then reheated to 200 ° C. and quenched to prepare a body of a welded tube in which a polyester resin film was attached to the welded portion. Again, a welded tube was manufactured by fastening an end of a can made of a steel plate coated with an electrolytic chromic acid treated steel sheet or tin plated steel sheet.
(실시예 2)(Example 2)
냉간압연강판에 탈지,산세 등의 전처리를 행한 후 니켈 60-200mg/m2및 주석 0.8-1.5 g/m2을 도금하고 화학처리를 하였다. 내면도장 및 외면인쇄 공정을 거쳐 용접제관을 한 뒤, 용접된 관을 235-245℃로 가열하고, 열접착성이 있는 폭 0.5-3Cm 의 띠모양의 이축연신 폴리에스테르 수지 필름을 접착롤을 이용하여 용접부위의 내면 또는 내,외면에 접착 시킨후 급랭하여 용접부위에 폴리에스테르 수지필름이 접착된 용접관의 몸체를 제조하였다. 실시예 1 에서와 같이 캔의 바닥 부분(End)을 체결(Seaming)하여 관을 제조하였다.After pretreatment such as degreasing and pickling on cold rolled steel sheets, nickel 60-200 mg / m 2 and tin 0.8-1.5 g / m 2 were plated and chemically treated. After welding and through the inner coating process and the outer printing process, the welded tube is heated to 235-245 ° C, and a band-shaped biaxially stretched polyester resin film having a thermal adhesiveness of 0.5-3Cm in width using an adhesive roll. After bonding to the inner surface or the inner, outer surface of the welding site by quenching to prepare a body of the welded tube to which the polyester resin film is bonded to the welding site. As in Example 1, the tube was manufactured by fastening the bottom portion of the can.
(실시예 3)(Example 3)
냉간압연강판에 탈지,산세 등의 전처리를 한 뒤 부착량 1.5-2,5 g/m2의 주석도금 및 화학 처리를 행하였다. 위 금속판을 180℃로 가열한 다음, 접착제가 도포된 뒤 띠모양의 폴리에스테르 수지필름을 접착롤을 이용하여 접착시키고 다시 210℃로 가열후 급랭하여 폴리에스테르 수지필름 피복 금속판을 제조하였다. 위 금속판을 절단 및 용접제관 후 170-190℃로 가열하여 접착제가 도포된 폭 0.5-3.5Cm 의 띠모양의 폴리에스테르 수지필름을 접착롤을 이용하여 용접부위내면 또는 내,외면에 접착시킨 후 다시 210-230℃ 로 가열하고 급랭함으로써 용접부위에 폴리에스테르 수지필름이 접착된 용접관을 제조하였다. 이렇게 하여 제조된 용접관의 몸체에 폴리에스테르 수지필름이 피복된 금속판으로 제조한 바닥(End)부분을 체결하여 내면이 전부 폴리에스테르 수지필름으로 피복된 캔을 제조하였다.After pretreatment such as degreasing and pickling on the cold rolled steel sheet, tin plating and chemical treatment with an adhesion amount of 1.5-2,5 g / m 2 were performed. After heating the upper metal plate to 180 ℃, after the adhesive is applied to bond the band-shaped polyester resin film using an adhesive roll, and then heated to 210 ℃ again to prepare a polyester resin film coating metal plate. After cutting and welding the upper metal plate, heat it to 170-190 ℃ and bond the band-shaped polyester resin film of 0.5-3.5Cm width to which the adhesive is applied to the inner or outer side of the welding site by using an adhesive roll, and then back again. By heating and quenching at 210-230 ° C., a weld tube in which a polyester resin film was attached to a welded portion was manufactured. The can was coated with a polyester resin film on its inner surface by fastening a bottom portion made of a metal plate coated with a polyester resin film to the body of the welded tube thus manufactured.
(비교예 1)(Comparative Example 1)
전처리를 한 냉간압연강판에 1.5-2.5 g/m2의 주석도금을 하고 화학처리를 하였다. 내면 도장 및 외면 인쇄공정을 거친 후 용접제관을 하고 용접부위에 공지의 도장처리를 행하였다. 실시예 1 과 같은 방법으로 캔의 바닥부분을 체결하여 용접캔을 제조하였다.The pre-treated cold rolled steel sheet was tin-plated at 1.5-2.5 g / m 2 and chemically treated. After the inner surface coating and the outer surface printing process, the welding was made, and a well-known coating treatment was performed on the welded portion. A welding can was manufactured by fastening the bottom portion of the can in the same manner as in Example 1.
실시예 1- 3 및 비교예 1에서 제조한 캔의 내식성을 아래와 같은 방법으로 시험하였을 때의 결과를 표 1 에 나타내었다.Table 1 shows the results when the corrosion resistance of the cans prepared in Examples 1-3 and Comparative Example 1 were tested by the following method.
시험방법Test Methods
1. 에나멜 벨류 시험(enamel value test): 실시예 1 - 3 및 비교예 1 과 같이 하여 제조한 용접캔에 1 % 염화나트륨(NaCl)용액을 채운 뒤 캔몸체를 양극으로 하고 스테인레스 봉을 음극으로 하여 6.4V 의 일정전압을 가하였을 때 흐르는 전류를 측정하였다.1. Enamel value test: A 1% sodium chloride (NaCl) solution is filled into the welding cans prepared in Examples 1 to 3 and Comparative Example 1, and the can body is used as the anode and the stainless rod is used as the cathode. The current flowing when a constant voltage of 6.4V was applied was measured.
2. 공관의 내식성 시험(염수분무 시험): 40℃의 온도에 시험공관을 넣고 5% 염화나트륨 용액을 분무하여 발청 정도를 비교하였다.2. Corrosion resistance test of the tube (salt spray test): The test tube was put at a temperature of 40 ℃ and sprayed 5% sodium chloride solution to compare the degree of corrosion.
3. 실관시험 : 탄산음료를 시료에 충진한 후 뚜껑을 덮고 40℃에서 3 개월간 저장한 후 철의 용출량 및 부식상태를 상태를 관찰함.3. Tube test: After filling the carbonated beverage with the sample, cover it and store it at 40 ℃ for 3 months, and then observe the state of iron elution and corrosion.
4. 실관 시험(부식성 내용물에 대한 내식성) : 시험공간에 고려화학제 선저도료(anti-fouling paint) 및 전착도료를 각각 충진한 후 뚜껑을 덮고 40℃에서 2 개월간 저장한 후 부식상태를 비교관찰하였다.4. Seal test (corrosion resistance to corrosive contents): After filling the test space with anti-fouling paint and electrodeposition paint made by Korea Chemical, cover it and store it at 40 ℃ for 2 months, and then observe the corrosion state. It was.
[표 1]TABLE 1
캔의 내식성 비교Corrosion Resistance Comparison of Cans
본 발명에 의한 용접부위에 폴리에스테르 수지필름이 피복된 용접캔은 종래 용접부위에 도장처리를 하는 캔에 비하여 내식성 및 내화학약품성, 식품보존성 등이 획기적으로 향상됨으로써 용접부위의 내식성 및 내약품성의 문제로 인하여 그 적용이 제한되었던 부식성이 강한 내용물에 대한 저장이 가능하게 되었을 뿐만 아니라 환경에 유해한 유기용매의 배출공정이 없어지므로 해서 환경친화적 캔의 제조가 가능하게 되었다. 또한 폴리에스테르 수지필름을 피복시킨 금속판을 이용하여 용접제관후 용접부위에 폴리에스테르 수지필름을 부착시켜 용접부위의 내식성 및 내약품성을 향상시킬 경우 내용물을 저장하는 내면이 전부 내화학 약품성 및 내용물 보존성이 매우 우수한 폴리에스테르 수지필름으로 피복됨으로서 부식성이 강한 화학약품류, 페인트류, 기름류 등을 저장하는 용기에도 적용할 수 있게 되어 종래의 플라스틱 용기를 대체하는 것이 가능하다. 프라스틱 용기를 대체할 경우 용기자체의 경비 절약뿐만 아니라 저장 및 수송시 다단 적재가 가능하여 저장 및 수송공간이 대폭감소하게 되며 이로 인하여 전체적인 제조경비가 획기적으로 감소될 수 있다.Welding cans coated with a polyester resin film on the welded portion according to the present invention is significantly improved in corrosion resistance, chemical resistance, food preservation, and the like, compared to conventional cans coated on the welded portion, resulting in problems of corrosion resistance and chemical resistance of the welded portion. This not only enabled the storage of highly corrosive contents that had limited application, but also eliminated the process of discharging organic solvents that are harmful to the environment, thereby making it possible to manufacture environmentally friendly cans. In addition, when the polyester resin film is attached to the welded area after welding preparation using a metal plate coated with a polyester resin film to improve the corrosion resistance and chemical resistance of the welded area, all the inner surfaces storing the contents have very high chemical resistance and content retention. By coating with an excellent polyester resin film it can be applied to a container for storing highly corrosive chemicals, paints, oils and the like, it is possible to replace the conventional plastic container. If the plastic container is replaced, not only the cost of the container itself but also multi-stage loading during storage and transportation can greatly reduce the storage and transportation space, which can significantly reduce the overall manufacturing cost.
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