KR20020004231A - A color sheet and a manufacturing process of it - Google Patents
A color sheet and a manufacturing process of it Download PDFInfo
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- KR20020004231A KR20020004231A KR1020000037941A KR20000037941A KR20020004231A KR 20020004231 A KR20020004231 A KR 20020004231A KR 1020000037941 A KR1020000037941 A KR 1020000037941A KR 20000037941 A KR20000037941 A KR 20000037941A KR 20020004231 A KR20020004231 A KR 20020004231A
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- South Korea
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- steel sheet
- layer
- coating
- thin film
- color steel
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 238000000576 coating method Methods 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 45
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920002647 polyamide Polymers 0.000 claims abstract description 19
- 239000010408 film Substances 0.000 claims abstract description 17
- 239000010409 thin film Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000003973 paint Substances 0.000 claims abstract description 14
- 239000000049 pigment Substances 0.000 claims abstract description 13
- 229920000728 polyester Polymers 0.000 claims abstract description 12
- 229920001225 polyester resin Polymers 0.000 claims abstract description 12
- 239000004645 polyester resin Substances 0.000 claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000004952 Polyamide Substances 0.000 claims abstract description 8
- 238000007747 plating Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 65
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 229920000642 polymer Polymers 0.000 abstract description 5
- 239000011247 coating layer Substances 0.000 abstract description 4
- 206010016322 Feeling abnormal Diseases 0.000 abstract description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 239000008397 galvanized steel Substances 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000001029 thermal curing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/061—Special surface effect
- B05D5/063—Reflective effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific 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
- 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
- B32B15/09—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 comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/20—Chromatation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2508/00—Polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2602/00—Organic fillers
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
- B32B2264/0214—Particles made of materials belonging to B32B27/00
- B32B2264/0264—Polyamide particles
-
- 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
- B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
본 발명은 용융아연도금강판, 전기아연도금강판 및 알루미늄강판 등의 소지강판의 일면에 내식성의 부여를 위해 크롬산염처리를 하고 서로 다른 특성을 가지는 고분자 폴리에스테르계 도료를 상·하도 2중으로 순차적으로 도포한 입체질감을 가지는 칼라강판과 그 제조방법을 개시한다.The present invention is a chromate treatment to give corrosion resistance to one surface of the base steel sheet, such as hot-dip galvanized steel sheet, electro-galvanized steel sheet and aluminum steel sheet, and the polymer polyester paint having different characteristics sequentially in the top and bottom two A color steel sheet having a coated three-dimensional texture and a manufacturing method thereof are disclosed.
본 발명 칼라강판은 합금도금층 위에 롤코팅 방법으로 박막을 도포한후 80∼120℃의 온도조건에서 건조시켜 15∼45㎎/㎡의 크롬산염층을 형성시키는 제 1단계와, 상기 크롬산염층 위에 폴리에스테르 수지를 포함하는 도료를 4∼6㎛의 박막으로 롤코팅한 후 204∼232℃의 온도조건에서 건조시켜 하도를 형성하는 제 2단계와, 상기 하도 위에 폴리아미드계 안료입자와 폴리에스테르 수지를 포함하는 도료를 18∼22㎛의 박막으로 롤코팅한 후 204∼241℃의 온도조건에서 건조시켜 상도를 형성하는 제 3단계로 이루어지는 것을 특징으로 하는 제조방법에 의해 생산된다.Color steel sheet of the present invention is a first step of forming a chromate layer of 15 to 45mg / ㎡ by applying a thin film on the alloy plating layer by a roll coating method and dried at a temperature condition of 80 ~ 120 ℃, on the chromate layer A second step of forming a coat by rolling a coating material comprising a polyester resin into a thin film having a thickness of 4 to 6 μm and drying at a temperature of 204 to 232 ° C., and a polyamide pigment particle and a polyester resin on the coat. It is produced by a manufacturing method comprising a third step of forming a top coat by rolling a coating comprising a thin film of 18 ~ 22㎛ and dried at a temperature condition of 204 ~ 241 ℃.
상기의 제조방법에 의해 생산된 칼라강판은 상기 상도층의 도료에 포함되어 있는 폴리아미드계 안료입자에 의한 돌출성형및 도료의 열경화밀도차이에 의해 미려하고 부드러운 느낌의 2중의 입체질감을 가지고 있으며, 하도층과 상도층의 계면에서 도막의 균열을 흡수하고 상도층에는 선형구조의 도막을 형성함으로써 가공성이 뛰어나고 내오염성이 좋으며 별도의 시설투자비용없이 생산할 수 있는 경제성이 우수한 효과가 있다.The color steel sheet produced by the above manufacturing method has a double three-dimensional texture with a beautiful and soft feeling due to the extrusion molding by the polyamide pigment particles contained in the paint of the top coat layer and the thermal curing density difference of the paint. In addition, by absorbing cracks in the coating film at the interface between the lower and upper coating layers, and forming a coating film having a linear structure in the upper coating layer, it has excellent workability, good stain resistance, and economical efficiency that can be produced without additional facility investment cost.
Description
본 발명은 소지강판의 부식 방지를 위하여 도포형 크롬산염처리를 하고, 그 상층에 기능성을 부여하는 고분자 폴리에스테르 도료를 도장한 후 열경화 시켜 고품질의 입체질감을 형성한 칼라강판과 그 제조방법에 관한것이다.The present invention is applied to the coated chromate treatment to prevent corrosion of the base steel sheet, and coated with a high-molecular polyester coating material that gives functionality to the upper layer and then heat-cured to form a high-quality three-dimensional texture in the color steel sheet and its manufacturing method It's about.
강판은 강도가 우수하고 가공이 용이하여 가전제품 및 건자재용으로 많이 사용되고 있다. 그러나 강판은 쉽게 부식된다는 취약점을 지니고 있어 이를 보완하고자 강판 표면에 아연이나 알루미늄을 도금하고 크롬산염처리를 하여 내식성을 향상시키고 있다. 이와 같이 도금과 크롬산염처리를 거친 강판에 도장처리를 함으로써 강판의 내식성을 향상시킴과 동시에 도료가 가지고 있는 다양한 색상을 이용하여 장식의 효과를 높여 사용하고 있으며, 최근에는 수요가의 요구에 따라 일정한 형태의 인쇄를 실시하거나, 특수한 질감을 부여하는 등의 다양한 기능을 부여한 제품들의 개발을 실시하고 있다.Steel sheet is excellent in strength and easy to process, and is widely used for home appliances and construction materials. However, the steel sheet has a weakness that it is easily corroded, and to compensate for this, zinc or aluminum is plated on the surface of the steel sheet and chromated to improve corrosion resistance. In this way, by coating the steel plate after plating and chromate treatment, it improves the corrosion resistance of the steel plate and increases the effect of decoration by using various colors of paints. We are developing products with various functions, such as printing forms or giving special textures.
이와 같이 수요가의 요구나 사용용도에 따라 특수 기능이 부여된 강판중에서, 건물의 내·외장재 및 TV, 오디오, 컴퓨터를 비롯한 가전제품의 외장 케이스 등에 사용되는 강판은 특히 색상의 아름다움 및 입체질감의 부여 등 외관의 미려함이 요구되어지고 있다.Among the steel sheets that have been given special functions according to the demand or usage of the demand, steel sheets used for interior and exterior materials of buildings and exterior cases of home appliances such as TVs, audio, computers, etc. The beauty of the appearance such as the impartment has been demanded.
이러한 요구에 따라 입체질감을 부여한 칼라강판이 사용되고 있으며, 현재 강판제품의 표면에 입체질감을 부여하기 위하여 사용되고 있는 방법은, 강판에 도금 및 크롬산염처리를 하고 그 상층에 고분자 폴리에스테르 도료를 도장한 후 강판에 무늬 형태의 입체감을 부여하기 위하여 무늬가 새겨진 금속롤로써 압하처리를 하거나, 도 1에서 도시하는 바와 같이 강판의 표면에 20∼40㎛정도의 큰 안료입자(2)를 돌출시켜 안료입자가 가지고 있는 질감을 이용하는 방법이 사용되고 있다. 미설명 부호 (1)과 (3)은 각기 다른 특성을 가지는 폴리에스테르계 도료 도막층이다.In accordance with these requirements, a color steel sheet having a three-dimensional texture is used. The method currently used to provide a three-dimensional texture on the surface of a steel sheet product is obtained by plating a steel sheet and chromate treatment and coating a polymer polyester coating on the upper layer. In order to give the steel sheet a three-dimensional appearance in the form of a pattern, it is pressed with a metal roll engraved with a pattern, or as shown in FIG. 1, the pigment particles are formed by protruding large pigment particles 2 of about 20 to 40 µm onto the surface of the steel sheet. The method using the texture that I have is used. Reference numerals (1) and (3) are polyester-based coating film layers having different characteristics.
그러나 이러한 방법으로 제품을 제조할 때에는, 금속롤을 이용한 압하처리의경우 기존의 칼라도장 강판 생산 후 압하를 가할 수 있는 고가의 설비를 보유하지 못할 경우에는 생산이 불가능하며, 압하가공시 제품표면 손상등의 문제점이 발생하여 가공성이 저하되고, 안료입자의 크기 및 밀도를 조정하는 방식만을 사용할 때에는 돌출된 안료의 형태만으로 질감이 부여되므로 부드럽고 특수한 형태의 질감을 표현하는 것에는 한계가 있으며 도 1에서 도시하는 바와 같이 도막표면에 안료입자(2)가 돌출되어 있어 먼지등의 오염 및 내스크래치성이 떨어지는 단점을 지니고 있었다.However, when manufacturing the product by this method, it is impossible to produce the product by using metal rolls if the expensive equipment that can be pressed after the production of the existing color coated steel sheet cannot be produced, and the surface of the product is damaged during the rolling process. Problems occur such that the workability is lowered, and when only the method of adjusting the size and density of the pigment particles is used, the texture is given only by the shape of the protruding pigment, so there is a limit in expressing the texture of the soft and special shape. As shown in the drawing, the pigment particles 2 protruded from the surface of the coating film, which has a disadvantage in that dirt and scratch resistance are poor.
본 발명은 상기의 문제점들을 감안하여 안출한 것으로, 도금강판의 크롬산염층 위에 2중으로 도포되는 폴리에스테르 도료의 경화 메카니즘(Mechanism)을 변경하고 폴리아미드계 특수안료입자 및 폴리아미드계 왁스를 사용함으로써, 도막이 미려한 2중의 입체질감과 빛의 난반사 유도효과로 인한 솜털구름처럼 부드러운 표면질감을 가지고 있으며, 내스크래치성이 우수하고 표면의 오염이 잘되지 않으며, 별도의 고가 생산설비 없이 생산이 가능한 칼라강판을 제공함에 그 목적이 있다.The present invention has been made in view of the above problems, by changing the curing mechanism of the polyester coating applied on the chromate layer of the plated steel sheet (double) and by using polyamide-based special pigment particles and polyamide-based wax , Beautiful three-dimensional texture with beautiful coating and soft surface texture like fluffy cloud due to diffuse reflection effect of light, excellent scratch resistance, no contamination of surface, and production without additional expensive production equipment The purpose is to provide.
본 발명은 상기의 목적을 달성하기 위하여, 합금도금된 소지강판위에 서로 다른 특성의 도료가 순차적으로 도포되어 이루어진 칼라강판의 합금도금층 위에 15∼45㎎/㎡의 박막으로 도포된 크롬산염층과; 폴리 에스테르 수지를 포함하는 도료로 이루어지고 상기 크롬산염층 상에 4∼6㎛의 박막으로 도포되는 하도층과; 폴리에스테르 수지를 포함하는 도료에 10∼30㎛의 범위 내에서 서로 다른 크기를 가지는 폴리아미드계 왁스 및 폴리아미드계 실리카입자가 혼합되어 이루어지고, 상기하도층이 완전 경화된 후 그 위에 18∼22㎛의 박막으로 도포되는 상도층으로 이루어 지며, 상기 상도층의 상부측에, 폴리아미드계 왁스가 용융된 후 도료와 함께 경화되어 이루어지고, 빛의 난반사가 극대화되도록 불규칙한 도막면을 가지는 멜팅경화층(53)이 형성된 것을 특징으로 한다.In order to achieve the above object, the present invention provides a chromate layer coated with a thin film of 15 to 45 mg / m 2 on an alloy plated layer of a color steel sheet in which paints of different characteristics are sequentially applied on an alloy plated steel sheet; An undercoat layer comprising a coating material comprising a polyester resin and coated on the chromate layer with a thin film of 4 to 6 μm; Polyamide-based wax and polyamide-based silica particles having different sizes within a range of 10 to 30 μm are mixed with a coating material comprising a polyester resin, and the base layer is completely cured and then 18 to 22 on it. It is composed of a top coat layer coated with a thin film, the upper side of the top layer, the polyamide wax is melted and made with a coating, and the melt-hardening layer having an irregular coating surface to maximize the diffuse reflection of light 53 is formed.
본 발명의 또다른 목적은 상기의 칼라강판을 생산하기위한 제조방법을 제공함에 있다.Another object of the present invention to provide a manufacturing method for producing the color steel sheet.
상술한 목적을 달성하기 위한 본 발명 칼라강판의 제조방법은, 합금도금층 위에 롤코팅 방법으로 박막을 도포한후 80∼120℃의 온도조건에서 건조시켜 15∼45㎎/㎡의 크롬산염층을 형성시키는 제 1단계와; 상기 크롬산염층 위에 폴리에스테르 수지를 포함하는 도료를 4∼6㎛의 박막으로 롤코팅한 후 204∼232℃의 온도조건에서 건조시켜 하도층을 형성하는 제 2단계와; 상기 하도층 위에 폴리아미드계 안료입자와 폴리에스테르 수지를 포함하는 도료를 18∼22㎛의 박막으로 롤코팅한 후 204∼241℃의 온도조건에서 건조시켜 상도층을 형성하는 제 3단계로 이루어지는 것을 특징으로 한다.In the method for producing a color steel sheet according to the present invention for achieving the above object, a thin film is coated on the alloy plating layer by a roll coating method and dried at a temperature of 80 to 120 ° C. to form a chromate layer of 15 to 45 mg / m 2. Making a first step; A second step of roll coating a coating material containing a polyester resin on the chromate layer with a thin film of 4 to 6 μm and drying it at a temperature condition of 204 to 232 ° C. to form an undercoat layer; Roll coating a coating material containing a polyamide pigment particles and a polyester resin on the undercoat layer to a thin film of 18 ~ 22㎛ and dried in a temperature condition of 204 ~ 241 ℃ to form a top layer It features.
도 1은 특수안료로 입체감을 부여한 종래 칼라강판의 상도층 단면도.1 is a cross-sectional view of the top layer of a conventional color steel sheet imparted a three-dimensional effect with a special pigment.
도 2는 본 발명 칼라강판의 부분 단면도.2 is a partial cross-sectional view of the present invention color steel sheet.
도 3은 본 발명 칼라강판의 상도층 단면도.Figure 3 is a cross-sectional view of the top layer of the color steel sheet of the present invention.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
10 : 소지강판 20 : 합금도금층10: base steel sheet 20: alloy plating layer
30 : 크롬산염층 40 : 하도층30: chromate layer 40: undercoating layer
50 : 상도층 51 : 실리카입자50: top layer 51: silica particles
52 : 도료 53 : 멜팅경화층52: Paint 53: Melting Hardening Layer
이하 본 발명을 도면을 참조하여 더욱 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to the drawings.
도 2는 본 발명 칼라강판의 부분 단면도인데, 도시하는 바와 같이 본 발명은 합금도금층(20)과 크롬산염층(30), 그리고 하도층(40) 및 상도층(50)으로된 2중의 고분자 폴리에스테르 도막층이 소지강판(10)의 일면에 연속적으로 도포되어 있다.2 is a partial cross-sectional view of the color steel sheet of the present invention, as shown in the present invention is a double polymer poly alloy consisting of an alloy plating layer 20, chromate layer 30, and the undercoat layer 40 and the top coat layer 50 An ester coating layer is continuously applied to one surface of the base steel sheet 10.
소지강판(10)은 냉간압연강판, 용융아연도금강판, 전기아연도금강판 및 알루미늄 강판을 사용하며, 소지강판(10)의 표면에 존재하는 녹, 유분, 먼지 등의 오염물을 알카리액을 이용하여 완전히 제거한 후, 제품에 내식성을 부여하기 위하여 소지강판 위에 롤코팅 방법을 사용하여 얇은 박막으로 크롬산염을 도포한 후 80∼120℃의 온도조건에서 건조시켜 10∼45㎎/㎡의 크롬산염층(20)을 형성시킨다.The steel sheet 10 uses a cold rolled steel sheet, a hot dip galvanized steel sheet, an electrogalvanized steel sheet, and an aluminum steel sheet. The alkaline steel is used to remove contaminants such as rust, oil, and dust existing on the surface of the steel sheet 10 by using an alkaline liquid. After complete removal, in order to give corrosion resistance to the product, using a roll coating method on the base steel sheet is coated with a thin thin film and then dried under a temperature condition of 80 ~ 120 ℃ chromate layer of 10 ~ 45mg / ㎡ ( 20).
고분자 폴리에스테르 도막층은 하도층(40)과 상도층(50)의 2층 구조로 이루어지는데, 본 발명은 하도층(40)과 상도층(50)이 각기 다른 온도조건에서 건조되며, 하도층(40)의 완전건조 후에 상도층(50)이 도포되는 특징을 가지고 있다.The polymeric polyester coating layer is composed of a two-layer structure of the undercoat layer 40 and the top coat layer 50. In the present invention, the undercoat layer 40 and the top coat layer 50 are dried at different temperature conditions, and the undercoat layer The top coat layer 50 is applied after complete drying of the 40.
하도층(40)의 건조도막두께는 통상 4∼6㎛로 상기 크롬산염층(30) 위에 작업을 실시하나, 5㎛로 작업하는 것이 바람직하며, 소부온도는 204∼232℃(Pick metal temperature 기준)에서 실시하게 된다. 하도층(40)은 상도층(50)의 고분자 폴리에스테르 수지와의 소재 부착성 및 유연성을 유지시키기 위해서 부착성이 우수한 에폭시수지를 브랜딩하고 폴리이소시네이트 수지를 가교제로한 우레탄 수지를 결합하여 하도 자체의 기본물성인 일반적인 내식성 및 상도와 도금강판과의 부착성 강화외에 충분한 연신율을 부여하여 가공시 발생되는 소재의 균열이 상도층(50)까지 발전되지 않고 하도층(40)에서 흡수하게된다.The dry coat thickness of the undercoat layer 40 is usually 4-6 탆, but the work is performed on the chromate layer 30, but it is preferable to work at 5 탆, and the baking temperature is 204-232 캜 (Pick metal temperature standard). ). In order to maintain the adhesion and flexibility of the topcoat layer 50 with the polymeric polyester resin of the topcoat layer 40, the undercoat layer is branded with an epoxy resin having excellent adhesiveness and a urethane resin having a polyisocyanate resin as a crosslinking agent is combined. By providing sufficient elongation other than general corrosion resistance and top coat and adhesion of plated steel, which are basic properties thereof, cracks of a material generated during processing are absorbed in the undercoat layer 40 without being developed to the top coat layer 50.
상도층(50)은 상기 하도층(40)이 완전경화한 후 상기 하도층(40) 위에 건조도막두께가 18∼22㎛이 되도록 롤코팅 방식으로 도장을 실시한 후, 204∼241℃(Pick metal temperature 기준)의 온도조건에서 건조한다. 상도층(50)을 구성하는 고분자폴리에스테르 도료(52)는 고분자 폴리에스테르계 수지를 부수지로 하고 멜라민 가교제로 경화시키는 열경화형 도료로, 특히 10∼30㎛의 범위 내에서서로 다른 크기를 가지는 폴리아미드계 왁스(미도시) 및 폴리아미드계 실리카입자(51)를 혼합하였다. 도 3에 도시한 바와같이 상기 폴리에스테르계 도료(52)에 혼합되는 폴리 아미드계 실리카입자(51)는 상기 하도층(40) 상에 불규칙적으로 돌출되어 도막에 1차적인 입체감을 주게된다. 상기 폴리에스테르계 도료(52)에 혼합된 폴리아미드계 왁스는 높은 건조온도에서 용융된 후 상기 폴리에스테르계 도료(52)와 함께 경화되어 상기 상도층의 상부측에 멜팅경화층(53)을 형성하게 되는데, 상기 멜팅경화층(53)은 폴리아미드계 왁스의 영향으로 표면도막이 윤택해져 거친촉감없이 솜털구름처럼 부드러운 느낌을 준다. 상도층(50)은 폴리아미드계 실리카입자(51)와 멜팅경화층(53)으로 인해 불규칙한 두께를 가진 도막으로 형성되는데, 이는 건조경화시에 두께가 서로 다른 부분의 경화시간차를 가져오게되고 결국 도막의 표면경화밀도차이를 유발하게 된다. 이러한 도막의 표면경화밀도차이는 빛의 난반사를 유도하게 되어 도막에 특수한 느낌의 입체질감을 부여하게 된다.The top coat layer 50 is coated with a roll coating method such that a dry film thickness is 18 to 22 μm on the undercoat layer 40 after the undercoat layer 40 is completely cured, and then 204 to 241 ° C. (Pick metal dry under the temperature condition of The polymer polyester paint 52 constituting the top coat layer 50 is a thermosetting paint that cures the polymer polyester resin as an auxiliary resin and cures it with a melamine crosslinking agent. In particular, the polyester having a different size within a range of 10 to 30 μm Amide wax (not shown) and polyamide silica particles 51 were mixed. As shown in FIG. 3, the polyamide-based silica particles 51 mixed with the polyester-based paint 52 protrude irregularly on the undercoat 40 to give a primary three-dimensional appearance to the coating. The polyamide wax mixed in the polyester paint 52 is melted at a high drying temperature and then cured together with the polyester paint 52 to form a melt hardening layer 53 on the upper side of the top coat layer. The melting hardening layer 53 is a surface coating film is polished under the influence of the polyamide-based wax to give a soft feeling like fluffy clouds without a rough touch. The top coat layer 50 is formed of a coating film having an irregular thickness due to the polyamide-based silica particles 51 and the melt-hardening layer 53, which brings a difference in curing time between parts having different thicknesses during dry curing. The difference in surface hardening density of the coating film is caused. The difference in surface hardening density of the coating film induces diffuse reflection of light, thereby imparting a three-dimensional texture of a special feeling to the coating film.
상도층(50)은 수요가의 사용 용도에 따른, 가공시 나타나는 가공부위의 도막균열(크랙)이나, 사용중 발생되는 표면오염 방지등의 제반 요구사항을 해결하기 위하여 도막의 연신율이 우수하고 내오염성이 우수하게 하였다. 기존의 PCM 도료는 망상구조로 되어 있어 도막 형성 후에 도막의 연신이 극히 제한적이었지만, 본 발명 칼라강판은 선형구조로 도막이 형성되도록 특수 멜라민수지(HMMA TYPE)를 적용하여 도막의 연신율 및 내구력이 극대화되도록 함으로써, 외부의 물리적인 압력에 대하여 상도층(50)이 균열을 일으키지 않으므로 가공성이 한층 향상되었다.The top coat layer 50 has excellent elongation and pollution resistance in order to solve all the requirements such as coating cracks (cracks) in processing parts or surface contamination occurring during use, depending on the purpose of use. This made it excellent. Existing PCM paint has a network structure so that the stretching of the coating after the formation of the coating was extremely limited, the present invention color steel sheet to apply a special melamine resin (HMMA TYPE) to form a coating film in a linear structure to maximize the elongation and durability of the coating As a result, since the top coat layer 50 does not cause cracking under external physical pressure, workability is further improved.
상도도료의 조성은 무게대비 함량으로 안료 5∼30%, 수지 30∼35%, 용제 35∼55%, 첨가제 5∼6%이며, 안료는 상·하도에 관계없이 일반적으로 PCM도료에 사용되는 내구력이 우수한 무기 및 유기 안료를 제한없이 사용할 수 있다.The composition of top coat is 5-30% of pigment, 30-35% of resin, 35-55% of solvent, and 5-6% of additive. The pigment is generally used for PCM paint regardless of top and bottom. This excellent inorganic and organic pigment can be used without limitation.
상기의 명백한 설명과 같이 본 발명에 의한 제조방법에 따르면, 폴리아미드계 실리카입자(51)의 돌출성형을 통하여 1차적인 입체질감을 얻게 되고, 멜팅경화층(53)이 윤택한 도막면을 형성하여 거친느낌없이 솜털구름처럼 부드러운 느낌을 얻을 수 있으며, 최종적으로 도막의 표면경화밀도차이로 인한 빛의 난반사 유도 효과로 특수한 입체질감을 얻을수 있어, 기존의 평활한 칼라강판이나 압하가공을 통해 입체감을 부여한 칼라강판에서는 표현하기 어려운 미려한 2중의 특수 입체질감을 가진 칼라강판을 얻을 수 있다.According to the manufacturing method according to the present invention as described above, the primary three-dimensional texture is obtained through the protruding molding of the polyamide-based silica particles 51, the melting hardening layer 53 forms a smooth coating film surface It is possible to obtain a soft feeling like fluffy clouds without rough feeling, and finally to obtain a special three-dimensional texture by the effect of diffuse reflection of light due to the difference in surface hardening density of the coating film, and through the conventional smooth color steel sheet or rolling process The color steel sheet which has a beautiful double special three-dimensional texture which is hard to express by the given color steel sheet can be obtained.
또한 본 발명에 의한 제조 방법에 따르면, 도막에 입체감을 부여하기위한 고가의 압하처리 시설을 별도로 할 필요가 없으므로 설비보유를 위한 투자비 절감등의 효과가 있다.In addition, according to the manufacturing method according to the present invention, there is no need to separate an expensive pressure reduction treatment facility for imparting a three-dimensional effect to the coating film has the effect of reducing the investment cost for equipment holding.
한편, 본 발명에 의한 제조방법에 따라 생산된 칼라강판은 내식성 및 부착성을 위하여 도포하는 하도층(40)이 소재와 상도층간(50)의 계면에서 완충작용을 하여 가공시에 발생되는 소재의 균열을 상도층(50)까지 발전시키지 않도록 흡수하하고, 상도층(50)이 연신율 및 내구력이 좋은 선형구조이므로 도막의 균열방지 및 가공성이 향상되는 효과가 있다. 또한 상도층(50)의 상부측에 멜팅경화층(53)이 폴리아미드계 실리카입자(51)를 덮고 있고, 도막면이 윤택하므로 내오염성이 향상되는효과가 있다.On the other hand, the color steel sheet produced according to the manufacturing method according to the present invention is a coating material for the corrosion resistance and adhesion properties of the material generated during processing by buffering action at the interface between the material and the top coat layer 50 The cracks are absorbed so as not to be developed to the top coat layer 50, and since the top coat layer 50 has a linear structure with good elongation and durability, the crack prevention and workability of the coating film are improved. In addition, since the melting hardening layer 53 covers the polyamide-based silica particles 51 on the upper side of the top coat layer 50 and the coating film surface is smooth, there is an effect of improving the stain resistance.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100503164B1 (en) * | 2002-09-19 | 2005-07-21 | 유니온스틸 주식회사 | Super weather color steel plate and its manufacturing method |
| WO2021125630A1 (en) | 2019-12-18 | 2021-06-24 | 주식회사 포스코 | Hot-dip zn-al-mg-based alloy-plated steel material having excellent corrosion resistance of processed portion, and method for manufacturing same |
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| KR102057044B1 (en) | 2016-05-04 | 2019-12-19 | (주)엘지하우시스 | Wall paper |
| KR101909703B1 (en) | 2016-08-23 | 2018-10-18 | (주)에프티씨코리아 | Plasticizer-migration resistant acrylic resin useful to pcm coating composition and method for manufacturing the same |
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| KR0180864B1 (en) * | 1996-06-03 | 1999-02-18 | 이철우 | Hot-dip zn coated color steel sheet and its manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100503164B1 (en) * | 2002-09-19 | 2005-07-21 | 유니온스틸 주식회사 | Super weather color steel plate and its manufacturing method |
| WO2021125630A1 (en) | 2019-12-18 | 2021-06-24 | 주식회사 포스코 | Hot-dip zn-al-mg-based alloy-plated steel material having excellent corrosion resistance of processed portion, and method for manufacturing same |
| KR20210077953A (en) | 2019-12-18 | 2021-06-28 | 주식회사 포스코 | Zn-Al-Mg BASED HOT DIP ALLOY COATED STEEL MATERIAL HAVING EXCELLENT CORROSION RESISTANCE OF PROCESSED PARTS AND METHOD OF MANUFACTURING THE SAME |
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