WO2023027309A1 - 강재 코팅용 복합 필름 및 이의 제조 방법 - Google Patents
강재 코팅용 복합 필름 및 이의 제조 방법 Download PDFInfo
- Publication number
- WO2023027309A1 WO2023027309A1 PCT/KR2022/008713 KR2022008713W WO2023027309A1 WO 2023027309 A1 WO2023027309 A1 WO 2023027309A1 KR 2022008713 W KR2022008713 W KR 2022008713W WO 2023027309 A1 WO2023027309 A1 WO 2023027309A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film layer
- film
- mesh
- polymer
- composite
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 239000002131 composite material Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims description 26
- 238000000576 coating method Methods 0.000 title claims description 24
- 239000011248 coating agent Substances 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 229920002959 polymer blend Polymers 0.000 claims description 53
- 229920000642 polymer Polymers 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 42
- 239000004698 Polyethylene Substances 0.000 claims description 40
- 230000005484 gravity Effects 0.000 claims description 23
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 22
- 229920003002 synthetic resin Polymers 0.000 claims description 21
- 239000000057 synthetic resin Substances 0.000 claims description 21
- 239000011256 inorganic filler Substances 0.000 claims description 18
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 18
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 16
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 16
- 229920001903 high density polyethylene Polymers 0.000 claims description 15
- 239000004700 high-density polyethylene Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 10
- 238000010030 laminating Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 12
- 239000000126 substance Substances 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 361
- 239000010410 layer Substances 0.000 description 277
- 229920000573 polyethylene Polymers 0.000 description 35
- 238000012360 testing method Methods 0.000 description 29
- 239000004594 Masterbatch (MB) Substances 0.000 description 17
- 239000000853 adhesive Substances 0.000 description 16
- 230000001070 adhesive effect Effects 0.000 description 16
- 239000004575 stone Substances 0.000 description 12
- 229920006254 polymer film Polymers 0.000 description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000032683 aging Effects 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 239000006229 carbon black Substances 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 6
- 238000003475 lamination Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002998 adhesive polymer Substances 0.000 description 1
- 238000007718 adhesive strength test Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000009975 flexible effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
- B29C48/0014—Extrusion moulding in several steps, i.e. components merging outside the die producing flat articles having components brought in contact outside the extrusion die
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
-
- 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
- B32B1/08—Tubular products
-
- 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
- B32B15/085—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 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/024—Woven fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0625—LLDPE, i.e. linear low density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/065—HDPE, i.e. high density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2623/00—Use of polyalkenes or derivatives thereof for preformed parts, e.g. for inserts
- B29K2623/04—Polymers of ethylene
- B29K2623/06—PE, i.e. polyethylene
- B29K2623/0608—PE, i.e. polyethylene characterised by its density
- B29K2623/065—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
- 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
- B32B2262/0253—Polyolefin 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- 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
- B32B2597/00—Tubular articles, e.g. hoses, pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
Definitions
- This invention relates to a composite film for coating steel and a method for manufacturing the same, and more specifically, the strength of the composite film for coating steel including a first film layer, a second film layer and a mesh film layer, adhesion to steel, and It relates to a composite film for coating steel materials having uniform quality on the entire surface of the film and a manufacturing method thereof.
- Steel pipe is widely used as a hollow formwork or construction chute in drainage of sewage and wastewater, agricultural water, salt sea areas, marine construction, and construction fields.
- corrugated steel pipes with excellent external pressure strength, structural safety, durability, economic feasibility, and workability have been in the limelight.
- the corrugated steel pipe has peaks and valleys and is continuously wound in a spiral shape in the longitudinal direction.
- a zinc coating layer is formed on the inner and outer peripheries to improve the corrosion resistance of the corrugated steel pipe, and recently, additional corrosion resistance has been secured.
- a corrugated steel pipe coated with a polymer film layer such as a PE film on top of a zinc coating layer is sometimes used.
- a conventional polymer film layer is composed of a double film including an adhesive film layer for securing adhesion with a zinc coating layer and a high-strength film layer for securing strength.
- the conventional polymer film layer having such a configuration has a problem in that the polymer film layer itself is weak against external impact and has a low tensile force, so that the surface of the polymer film layer is easily damaged in the process of producing, transporting, and constructing corrugated steel pipes, resulting in As a result, there is a problem in that the life of the corrugated steel pipe is shortened.
- the outer circumferential surface of the corrugated steel pipe is scratched (scarred, scratched) by the heavy equipment while the corrugated steel pipe is transported by heavy equipment such as a crane or excavator and buried at the installation site. of galvanized steel sheets are frequently damaged.
- the high-strength film layer of the polymer film layer coated on the outer and inner circumferential surfaces of the corrugated steel pipe cannot sufficiently buffer the impact caused by external shocks or foreign substances such as stones and gravel mixed in the fluid flowing through the corrugated steel pipe. Since the lifespan is shortened and new facilities must be installed in terms of productivity, there is a problem in that the manufacturing cost increases significantly and the mass productivity decreases.
- the composite film for coating steel materials of the present invention is the entire surface
- the quality is uniform and the adhesion to steel is excellent, so even if applied to a steel pipe of a complex shape such as a corrugated steel pipe, it is not easily peeled off and a strong bonding force can be formed.
- One embodiment of this invention for achieving the object as described above relates to a composite film for surface protection and reinforcement of steel materials.
- the composite film a first film layer attached to the upper portion of the steel; a second film layer positioned on top of the first film layer; and a mesh film layer having a mesh structure positioned on top of the second film layer.
- a portion of the mesh film layer may be buried into the second film layer while undergoing a heat-pressing process of the composite film.
- the first film layer may be formed of a first polymer mixture including a PE polymer and maleic anhydride.
- the second film layer may be made of a second polymer mixture including a PE polymer.
- the mesh film layer may be woven with synthetic resin yarn.
- the synthetic resin yarn may include HDPE and an inorganic filler.
- the specific gravity of the synthetic resin yarn is greater than the specific gravity of the second polymer mixture.
- the PE polymer included in the first film layer and the second film layer may be LLDPE.
- Another embodiment of the present invention relates to a method for manufacturing a composite film for coating steel materials, comprising: preparing a laminate in which an uncured first film layer 11 and a second film layer 12 are laminated; supplying and compressing a mesh film layer 13 on the second film layer 12 to produce a composite film 10 in which a portion of the mesh film layer 13 is embedded with the second film layer 12; and cooling the composite film 10 .
- the first film layer and the second film layer may include a PE polymer.
- the manufacturing of the laminate may include a first film layer manufacturing step of heating the first polymer mixture and extruding it into a film form; A second film layer manufacturing step of heating the second polymer mixture and extruding it into a film form; and laminating the first film layer and the second film layer.
- the first polymer mixture may include a PE polymer and maleic anhydride.
- the composite film for coating steel according to the present invention can be coated on steel to prevent corrosion and oxidation of steel, and the composite film itself has excellent strength and excellent adhesion to steel, thereby stably securing durability of steel for a long period of time.
- the composite film for coating steel is configured to include a first film layer, a second film layer, and a mesh film layer, the mesh film layer is partially embedded in the second film layer, and the outermost mesh film layer is exposed.
- the durability of the composite film for steel coating can be further improved.
- first film layer, the second film layer and the mesh film layer are firmly bonded to each other so that they are not easily peeled off.
- FIG. 1 is a view schematically showing a cross-section of a steel material coated on one surface with a composite film for coating steel material according to an embodiment of the present invention.
- each step the identification code is used for convenience of description, and the identification code does not explain the order of each step, and each step may be performed in a different order from the specified order unless a specific order is clearly described in context. there is. That is, each step may be performed in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.
- This invention relates to a composite film for coating steel and a method for manufacturing the same, and the composite film for coating steel according to the present invention can be coated on a steel to improve corrosion resistance and durability of the steel.
- One embodiment of this invention relates to a composite film for coating steel.
- the steel material is a product made of steel, and includes a steel plate and a steel pipe, and may also include a galvanized layer formed on the surface thereof.
- FIG. 1 is a view schematically showing a cross-section of a steel material coated on one surface with a composite film for coating steel material according to an embodiment of the present invention.
- This composite film 10 for coating steel is for protecting or reinforcing the surface of the steel material 20, the composite film is a first film layer 11 attached to the top of the steel material 20 ); a second film layer 12 positioned on top of the first film layer 11; and a mesh film layer 13 having a mesh structure positioned on top of the second film layer.
- a portion of the mesh film layer 13 is buried and firmly fixed into the second film layer 12 while undergoing a heat-pressing process of the composite film, and may be formed as an integral composite film.
- the first film layer 11 is formed to attach the composite film 10 to a steel material
- the second film layer 12 has a certain strength of the composite film 10. It is formed to cover the entire surface of the steel material while securing and at the same time serves to protect and reinforce the surface of the steel material 20, and the mesh film layer 13 is formed in the form of a net to increase the strength of the composite film 10 itself. formed to elevate
- the first film layer 11 and the second film layer 12 include a polyethylene (PE) polymer, more preferably a linear low density polyethylene (LLDPE) polymer, so that the first film layer 11 and Since the adhesive strength of the second film layer 12 to each other, to the steel material, and to the mesh film layer 13 is very excellent, the composite film 10 is peeled from the steel material 20 or the composite film 10 ) can be prevented from delamination. Therefore, more effective and long-term steel protection and reinforcing effects can be sustained.
- PE polyethylene
- LLDPE linear low density polyethylene
- the first film layer 11 is formed to provide adhesive strength between the composite film 10 and the steel material 20 .
- the first film layer 11 may be formed to a thickness of 0.01 to 0.1 mm, and when it is formed to be less than 0.01 mm, it is difficult to secure sufficient adhesive strength, and even when it exceeds 0.1 mm, the adhesive strength is rather deteriorated. Since there is, it is preferable to be formed in the above-described thickness range.
- the first film layer 11 may be formed of a first polymer mixture in which PE and maleic anhydride are mixed, and may be obtained by molding the first polymer mixture into a thin film form.
- the first polymer mixture includes a PE polymer, maleic anhydride, and a masterbatch for functional improvement. Specifically, it includes 50 to 85 wt% of PE polymer, 12 to 45 wt% of maleic anhydride, and 2 to 5 wt% of masterbatch.
- the PE polymer exhibits basic physical properties of the first polymer mixture, such as adhesion, strength, and chemical resistance.
- basic physical properties of the first polymer mixture such as adhesion, strength, and chemical resistance.
- PE polymer shows high impact strength even at low temperatures, has excellent abrasion resistance, chemical resistance, and corrosion resistance, and has low water absorption, so when applied to pipelines transporting fluids containing water, damage to pipes caused by water has the advantage of preventing
- LLDPE Linear Low Density Polyethylene
- HDPE high density polyethylene
- the PE polymer included in the first polymer mixture may be included in an amount of 50 to 85 wt%.
- the amount is less than 50 wt%, the basic strength, flexibility, and adhesive performance of the first film layer 11 are not expressed. , there is a problem that the first film layer 11 is not well molded into a film shape due to lack of formability.
- it exceeds 85 wt% since the content of maleic anhydride or masterbatch is relatively reduced, there is a problem in that the adhesive strength or strength of the first film layer 11 is lowered, so that the weight is included within the above-described weight range. it is desirable
- the maleic anhydride is a component added to improve the adhesion of the first film layer 11 to a different material.
- adhesive polymers have excellent adhesion to the same material, but relatively weak adhesion to different materials.
- maleic anhydride is used to increase the adhesion to the first film layer 11 and the steel material, which is a different material.
- the maleic anhydride may be included in an amount of 12 to 45 wt% in the first polymer mixture.
- the content of maleic anhydride is less than 12 wt%, the effect of improving adhesion is insignificant, and when it exceeds 45 wt%, relatively PE polymer Since the strength or adhesiveness of the first film layer 11 may be poor because the content of the masterbatch is reduced, it is preferably included within the above-described weight range.
- the masterbatch is a component added to improve the strength of the first polymer mixture and impart color, and may be included in an amount of 2 to 5 wt% in the first polymer mixture, and when included in this weight range, the first film layer ( 11), the strength can be improved without reducing the adhesiveness.
- the masterbatch may include 63 to 79 wt% of PE polymer, 20 to 36 wt% of carbon black, and 0.1 to 1.2 wt% of acetic acid, and the PE polymer used in this case is the same as the PE polymer included in the first polymer mixture. More preferably, this is because the PE polymer is added so that the master batch and the first polymer mixture are more uniformly mixed.
- Carbon black is a component added to impart color to the first film layer 11 and increase strength, and may be added in an amount of 20 to 36 wt%, and when included in less than 20 wt%, the first film layer 11 )
- the content of carbon black in the masterbatch is insufficient, so the effect of color expression and strength improvement is insignificant, and if it exceeds 36 wt%, the content of carbon black in the masterbatch is high, so uniform mixing in the first polymer mixture may be difficult.
- the flexibility of the first film layer 11 may be lowered, it is preferably included within the above-described weight range.
- the acetic acid is a component added to increase the miscibility of carbon black and PE polymer, and may be included in an amount of 0.1 to 1.2 wt%. When included, the frictional force on the surface of the first film layer 11 is reduced and the first film layer 11 is pushed, so there is a problem in that the adhesive force is lowered. it is desirable
- the second film layer 12 is formed to cover the surface of the steel material 20 by the first film layer 11, and increases water resistance, chemical resistance, corrosion resistance, and abrasion resistance of the steel material 20 to the surface of the steel material 20 By protecting the durability of the steel material 20 can be improved.
- the second film layer 12 may be formed to a thickness of 0.1 to 0.5 mm, and when it is formed to a thickness of less than 0.1 mm, the strength of the second film layer 12 is low, so that the composite film 10 is easily damaged. There is a problem, when the thickness of the second film layer 12 exceeds 0.5 mm, the thickness of the second film layer 12 becomes excessively thick, causing a problem in that it is easily separated from other layers, and for the same reason, the composite film 10 is removed from the steel material 20. Since it can be easily peeled off, it is preferable to be formed in the above-mentioned thickness range in the above-mentioned thickness range.
- the second film layer 12 may be formed of a second polymer mixture including a PE polymer, and may be manufactured by thinly molding the second polymer mixture into a film form.
- the second polymer mixture may include 95 to 99 wt% of the PE polymer and 1 to 5 wt% of the masterbatch.
- the PE polymer included in the second film layer 12 may be linear low density polyethylene (LLDPE).
- LLDPE linear low density polyethylene
- a strong adhesive force can be formed.
- LLDPE is used as the PE polymer included in the second film layer 12.
- a structure similar to that of the PE polymer constituting the first film layer 11 forms a stronger adhesive force. This is because the mesh film layer 13 can be embedded into the second film layer 12 in a more uniform form and strongly bonded.
- the melt index of LLDPE is 3 to 4 times higher than that of HDPE, the formability is very excellent, and the mesh film layer 13 is heat-compressed on the second film layer 12 to manufacture the composite film 10.
- the mesh film layer 13 may be more uniformly embedded into the second film layer 12 .
- the PE polymer may be included in an amount of 95 to 99 wt% in the second polymer mixture forming the second film layer 12.
- the content of the PE polymer is less than 95 wt%, the basic physical properties of the second film layer 12 Properties such as phosphorus adhesion, strength, and flexibility may be deteriorated, and when the content exceeds 99 wt%, there is a problem in that the effect of color expression and strength improvement by the masterbatch is insignificant.
- the masterbatch included in the second polymer mixture is the same as that included in the first polymer mixture, and is added to impart color and improve strength.
- the masterbatch included in the second polymer mixture may be included in an amount of 1 to 5 wt%, and if it is included in less than 1 wt%, the effect of imparting color and improving strength is insignificant, and if it is included in more than 5 wt%, 2 Since the basic physical properties of the film layer 12 may deteriorate, it is preferably included within the above-described weight range.
- the melt index of the second polymer mixture is preferably 1.0 g/10 min or more, and the mesh film layer 13 is uniformly and easily compressed into the second film layer 12 in the heat-compression process only when the melt index is formed high. because it can be
- the mesh film layer 13 is a film of a mesh structure obtained by weaving synthetic resin yarns, and is manufactured using HDPE as a main component, so that high strength can be formed while maintaining the flexibility of the composite film 10, so that the composite film ( 10) can improve the wear resistance and durability of the steel material 20 to which it is applied.
- the gaps of the mesh film layer 13 constitute the second film layer 12 in the buried area.
- the second polymer mixture is penetrated to form a strong adhesive force between the two film layers 12 and 13, and the mesh film layer 13 exposed to the outside rather than buried inside the second film layer 12 is a stone, gravel While acting as a buffer against the impact caused by foreign substances such as, these foreign substances directly contact the second film layer 12 to prevent damage to the second film layer 12, so that the durability of the composite film 10 is more There are advantages to improving.
- the second film layer 12 In the case where the mesh film layer 13 is completely embedded into the second film layer 12, the second film layer 12 is in direct contact with the foreign matter and the impact caused by the foreign matter directly affects the second film layer 12. Therefore, the wear of the second film layer 12 occurs frequently, causing damage to the composite film 10 and further reducing its lifespan.
- the mesh film layer 13 may be formed to a thickness of 0.1 to 1.0 mm, and when it is formed to a thickness of less than 0.1 mm, the difficulty of the process of partially embedding the mesh film layer 13 into the second film layer 12 Productivity decreases due to an excessive increase in , and it may be difficult to secure sufficient strength by the mesh film layer 13 .
- the thickness of the mesh film layer 13 exceeds 1.0 mm, the flexibility of the mesh film layer 13 is poor and it is difficult to bend flexibly to suit the shape of the steel material 20, so problems may occur in the coating process. there is.
- the mesh film layer 13 is a film in the form of a net obtained by weaving synthetic resin yarns.
- the cross-sectional diameter of the synthetic resin yarn forming the mesh film layer 13 may be 0.15 to 0.22 mm, and if it is less than 0.15 mm, it is difficult to form the mesh film layer 13 to a predetermined thickness, and the mesh film layer 13 The strength of may be reduced, and if the thickness exceeds 0.22 mm, a problem in that the mesh film layer 13 becomes excessively thick occurs.
- the porosity of the mesh film layer 13 may be 50 to 78%, and if it is less than 50%, the flexibility of the mesh film layer 13 may be difficult to form, and even if it is coated on the steel material 20, the mesh film layer ( 13) and the other film layers 11 and 12, a problem in that the mesh film layer 13 is peeled off may occur due to an extreme difference in flexibility.
- the size of the void formed in the mesh film layer 13 may be 0.5 to 1.2 mm, and if it is less than 0.5 mm, the mesh film layer 13 and the second film layer 12 are integrated with the heat pressing process.
- the second polymer mixture forming the second film layer 12 is difficult to penetrate into the gap of the layer 13, it is difficult to form a uniform bonding force between the two film layers 12 and 13, and when the thickness exceeds 1.2 mm Since the strength reinforcing effect by the mesh film layer 13 is insignificant, it is preferable to use the mesh film layer 13 having the above-described pore size range.
- the mesh film layer 13 may have 19 to 22 weft yarns per inch and 23 to 26 warp yarns per inch. It is also preferred that the number of weft yarns per inch is greater than the number of warp yarns.
- the porosity and pore size of the mesh film layer 13 are excessively small, making it difficult to embed into the second film layer 12 .
- the second film layer 12 in a molten state does not stably flow into the pores of the mesh film layer 13, so the second film layer 12 ) is pushed, and as a result, the thickness of the second film layer 12 is formed non-uniformly, which causes the strength and physical and chemical properties of the composite film 10 to be impaired.
- the synthetic resin yarn forming the mesh film layer 13 may include 98.5 to 99.9 wt% of HDPE and 0.1 to 1.5 wt% of an inorganic filler.
- the mesh film layer 13 is for increasing the strength of the composite film 10 and improving abrasion resistance, and is preferably formed of HDPE material having high hardness and strength. Even if is high, unlike the case where the first film layer 11 or the second film layer 12 is formed in the form of a film without voids, it may have a flexible property.
- the inorganic filler is added to increase the strength and specific gravity of the synthetic resin yarn. Since the abrasion resistance of the mesh film layer 13 is strengthened by the addition of the inorganic filler, it may not be easily damaged even when an external impact is repeatedly applied.
- the mesh film layer 13 is compressed by pressure during the hot pressing process of bonding the mesh film layer 13 and the second film layer 12. A portion of the mesh film layer 13 is buried into the second film layer 12, and even if the applied pressure is removed, the form in which a portion of the mesh film layer 13 is buried into the second film layer 13 is maintained due to a difference in specific gravity.
- the inorganic filler is preferably included in the synthetic resin yarn in an amount of 0.1 to 1.5 wt%, and if it is included in less than 0.1 wt%, the above-mentioned effect is not obtained, and if it is included in more than 1.5 wt%,
- the specific gravity of the mesh film layer 13 is excessively increased and the applied pressure is removed during the heat pressing process, the mesh film layer 13 is continuously embedded into the second film layer 12, and in some areas the mesh film layer ( 13) is completely buried inside the second film layer 12, causing a problem that the second film layer 12 is disposed on the uppermost layer, so it is preferable to add it to satisfy the above-described weight range.
- stone powder obtained by grinding stone materials such as granite, limestone, basalt, or waste stone to a certain size may be used.
- stone powder having an average particle size of 10 to 90 ⁇ m may be used. If the average particle size of the stone powder is less than 10 ⁇ m, the inorganic fillers aggregate with each other in the process of mixing the inorganic filler and HDPE, causing a problem of not being uniformly mixed, and if it exceeds 90 ⁇ m, the particle size of the stone powder is excessive. Due to its size, it is preferable to use stone powder having the above average particle size because it protrudes to the outside of the synthetic resin yarn and further detaches the stone powder, thereby reducing the durability of the yarn.
- the specific gravity of the synthetic resin yarn constituting the mesh film layer 13 is preferably greater than the specific gravity of the second polymer mixture constituting the second film layer 12 .
- the specific gravity of the synthetic resin yarn is 0.02 or more greater than the specific gravity of the second polymer mixture constituting the second film layer 12 . If the specific gravity difference between them is less than 0.02, the mesh film layer 13 is not easily embedded into the second film layer 12 during the heat-pressing process, and even after being embedded, the mesh film layer 13 in some areas is the second film layer. The second film layer 12 and the mesh film layer 13 in the re-surfacing area do not form a uniform thickness over the entire area, so the overall strength is not uniformly formed. This is because the bonding strength between them is reduced.
- Such a composite film 10 is coated on one side or both sides of the surface of the steel member 20 to protect and reinforce the steel member 20 by improving water resistance, chemical resistance, wear resistance and durability of the steel member.
- another embodiment of the present invention relates to a method for manufacturing a composite film for coating steel, and through this method, the composite film 10 according to an embodiment of the present invention can be manufactured, so duplicate descriptions are omitted. do.
- This method of manufacturing a composite film for coating steel comprises the steps of preparing a laminate in which an uncured first film layer 11 and a second film layer 12 are laminated; preparing a composite film 10 by supplying and compressing a mesh film layer 13 on the second film layer 12; and cooling the composite film 10 .
- the first polymer mixture which is a raw material of the first film layer 11, is heated to 150 to 235 ° C.
- the first film layer 11 and the second film layer 12 may be laminated after being manufactured in a film shape so as to be arranged side by side up and down.
- the first film layer 11 and the second film layer 12 are preferably performed in a temperature range of 220 to 240° C. so that they can be laminated in an uncured state.
- the thickness of the laminate may be adjusted according to the pressing pressure.
- the upper surface of the second film layer 12 may be molded to have a concave-convex shape to manufacture a film having an embossing structure.
- effects such as mitigation of external impact, guaranteeing adhesion (prevention of peeling), prevention of film damage, improvement in tensile strength, durability, abrasion resistance, corrosion resistance, and stiffness can be achieved. You can get it.
- the upper surface of the second film layer 12 may have a concavo-convex shape by applying heat, pressure, ultraviolet rays, or electron beams, or by processing with resin or chemicals.
- the laminate laminated through the lamination step is combined with the mesh film layer 13 to form the composite film 10 .
- a portion of the mesh film layer 13 is formed by supplying the mesh film layer 13 on the second film layer 12 of the laminate formed through the laminating step and compressing it using a pressing device such as a pressure roller.
- the composite film 10 embedded in the second film layer 12 may be manufactured.
- the laminate is still maintained at a high temperature by the heat applied in the lamination step, and since it is in an uncured state, a portion of the mesh film layer 13 is buried into the second film layer 12 through pressurization, and the first film layer (11), a composite film 10 in which the second film layer 12 and the mesh film layer 13 are integrated can be manufactured.
- the mesh film layer A part of (13) is embedded into the second film layer 12 and integrated, and the mesh film layer 13 continues to be completely buried or does not float to the top of the second film layer 12, but only partially embedded. can be maintained.
- the step of adjusting the flatness of the composite film 10 and the step of adjusting the tension of the film may be further performed as needed.
- these steps may be omitted.
- a step of cooling the composite film 10 is performed.
- various well-known methods may be applied as a cooling method, and preferably, a natural cooling method, an air cooling method, or a transfer that transfers the composite film 10 is performed.
- a method of cooling the device by air cooling or water cooling may be applied.
- a step of laminating a release film (not shown) on the lower surface of the first film layer 11 may be additionally performed immediately before, immediately after, or simultaneously with the cooling step being performed.
- a winding step of winding the composite film 10 to which the release film (not shown) is laminated in a roll form may be performed.
- a synthetic resin yarn having a diameter of 0.19 mm was prepared by mixing 99.4 wt% of HDPE polymer and 0.6 wt% of limestone powder having an average particle size of 20 to 50 ⁇ m as an inorganic filler, and weaved at a density of 21 wefts and 24 warps per inch to average
- a mesh film layer having a pore size of 0.8 to 1.0 mm, a porosity of 70%, and a thickness of 0.5 mm was prepared.
- a first polymer mixture was prepared by mixing 67 wt% of the LLDPE polymer, 29 wt% of maleic anhydride, and 4 wt% of the masterbatch, and a second polymer mixture was mixed with 97 wt% of the LLDPE polymer and 3 wt% of the masterbatch. was manufactured.
- the same masterbatch was used for the first polymer mixture and the second polymer mixture, and a pellet type masterbatch containing 74 wt% of LLDPE polymer, 25 wt% of carbon black, and 1 wt% of acetic acid was used.
- the first polymer mixture and the second polymer mixture are molded into a film form, respectively, to prepare a first film layer and a second film layer, and after bonding the first film layer and the second film layer by pressing, the two films
- the mesh film layer is supplied on the second film layer and compressed using a roller to prepare a composite film of Example 1 in which a part of the mesh film layer is embedded into the second film layer and integrated therewith.
- Test Items Example 1 adhesiveness -18°C clear 25°C clear 50°C clear permeation resistance 10% NaCl aqueous solution, 23°C, 48h clear 30% H 2 SO 4 aqueous solution, 23°C, 48h clear 10% NaOH aqueous solution, 23°C, 48h clear impact resistance 4.0J clear pinhole test 67.5V clear Exterior clear
- the composite film 10 of Example 1 had excellent low-temperature, room-temperature, and high-temperature adhesiveness, excellent permeation resistance and impact resistance, no pinholes, and good appearance.
- the composite film 10 of Comparative Example 1 was manufactured in the same manner as in Example 1, except that the LLDPE polymer included in the second polymer mixture was changed to the HDPE polymer.
- the strength was measured using the tensile strength (yield point) measurement method according to ASTM D638, and the thickness was measured at 25 random places to confirm the maximum thickness, minimum thickness, and thickness standard deviation.
- Example 1 Comparative Example 1 Tensile strength (kg f /cm 2 ) 238 242 Minimum thickness (mm) 0.747 0.820 Maximum thickness (mm) 0.764 0.693 Average thickness (mm) 0.758 0.766 thickness standard deviation 0.006 0.028
- Example 1 the thickness was uniformly formed in the entire area, but in the case of Comparative Example 1, it was confirmed that there was a large difference in thickness for each area compared to Example 1. This is due to the melt index of HDPE. It is judged to be a problem that appeared because the formability was poor due to high and the mesh film layer 13 was not uniformly embedded as a whole due to high density.
- LLDPE LLDPE
- the composite film 10 was manufactured using the same method as in Preparation Example, but the content of the inorganic filler added during the manufacture of the mesh film layer 13 was changed as shown in Table 3 below.
- the difference in specific gravity values between the two film layers is so small that the lower surface of the mesh film layer 13 is not uniformly embedded into the second film layer 12. From the results of this experiment, in order to prevent this problem, it can be confirmed that it is preferable that the difference in specific gravity between the second polymer mixture constituting the second film layer 12 and the synthetic resin yarn constituting the mesh film layer 13 is 0.2 or more. there was.
- the thickness standard deviation was found to be good, but it was observed that the mesh film layer 13 was completely buried into the second film layer 12 in some areas. In this case, since the second film layer 12 is located on the uppermost layer, the abrasion resistance of the composite film 10 may decrease.
- test piece 8 it was found that the elongation was significantly lowered compared to other test pieces, which is considered to be a problem caused by the excessively high content of the inorganic filler.
- the content of the inorganic filler included in the synthetic resin yarn constituting the mesh film layer 13 is 0.1 to 0.1 to form a portion of the mesh film layer 13 to be buried in the second film layer 12. It was confirmed that 1.5 wt% is preferable.
- the difference in specific gravity between the second polymer mixture constituting the second film layer 12 and the synthetic resin yarn constituting the mesh film layer 13 is preferably 0.2 or more.
- the first film layer 11 was manufactured in the same manner as in Example 1, except that the content of maleic anhydride added during preparation of the first polymer mixture was changed as shown in Table 4 below. At this time, the amount of maleic anhydride added or subtracted was adjusted to the same total amount of production by adding or subtracting the content of the PE polymer.
- a galvanized steel sheet was prepared, a galvanized steel sheet without any coating was prepared as test specimen 16, and the composite film 10 of Example 1 was coated on top of the zinc layer to prepare test specimen 17, and the composite film of Comparative Example 2 was prepared. This coated test piece 18 and the test piece 19 coated with the composite film of Comparative Example 3 were prepared.
- the composite film of Comparative Example 2 is prepared in the same manner as the composite film 10 of Example 1, but maleic anhydride is not included in the first polymer mixture, and HDPE polymer is used as the PE polymer of the second polymer mixture. , a composite film containing no inorganic filler was used in the mesh film layer.
- Wear resistance was evaluated through the number of cycles of the abrasive wheel.
- the number of revolutions when the coating layer was completely damaged or equivalent was described, and when no noticeable damage occurred even after a certain number of revolutions, it was indicated as “0 or more times”.
- This composite film for coating steel materials according to the present invention is coated on steel materials including steel pipes and steel plates to improve the strength and durability of steel materials, has uniform quality on the entire surface, and has excellent adhesion to steel materials, Since it has the advantage of forming a strong bonding force without being easily peeled off even when applied to a steel pipe of a complex shape, such as a steel pipe, there is industrial applicability.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Textile Engineering (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
시험 항목 | 실시예 1 | |
접착성 | -18℃ | 이상없음 |
25℃ | 이상없음 | |
50℃ | 이상없음 | |
투과저항성 | 10% NaCl 수용액, 23℃, 48h | 이상없음 |
30% H2SO4 수용액, 23℃, 48h | 이상없음 | |
10% NaOH 수용액, 23℃, 48h | 이상없음 | |
내충격성 | 4.0J | 이상없음 |
핀홀시험 | 67.5V | 이상없음 |
외관 | 이상없음 |
실시예 1 | 비교예 1 | |
인장강도(kgf/cm2) | 238 | 242 |
최소두께(mm) | 0.747 | 0.820 |
최대두께(mm) | 0.764 | 0.693 |
두께평균(mm) | 0.758 | 0.766 |
두께 표준편차 | 0.006 | 0.028 |
시험편 No. |
무기충전제 함량(wt%) |
비중값 차이(B-A) |
두께(mm) | 인장강도(kgf/cm2) | 신율(%) | |||
평균 | 표준편차 | 노화 전 | 노화 후 | 노화 전 | 노화 후 | |||
# 1 | - | 0.014 | 0.816 | 0.039 | 219 | 135 | 500이상 | 500이상 |
# 2 | 0.05 | 0.017 | 0.802 | 0.034 | 223 | 159 | 500이상 | 500이상 |
# 3 | 0.12 | 0.022 | 0.753 | 0.007 | 235 | 211 | 500이상 | 500이상 |
# 4 | 0.30 | 0.028 | 0.756 | 0.008 | 233 | 213 | 500이상 | 500이상 |
# 5 | 0.60 | 0.033 | 0.758 | 0.006 | 238 | 216 | 500이상 | 500이상 |
# 6 | 1.00 | 0.043 | 0.755 | 0.007 | 228 | 217 | 500이상 | 500이상 |
# 7 | 1.42 | 0.048 | 0.756 | 0.007 | 230 | 215 | 500이상 | 500이상 |
# 8 | 1.55 | 0.060 | 0.739 | 0.016 | 244 | 221 | 476 | 384 |
시험편 No. | 무수 말레산 함량(wt%) | 접착 강도(kgf/cm2) |
# 9 | - | 3.96 |
# 10 | 10.0 | 4.04 |
# 11 | 13.6 | 5.54 |
# 12 | 29.0 | 5.83 |
# 13 | 33.5 | 6.02 |
# 14 | 44.4 | 5.92 |
# 15 | 46.1 | 4.39 |
시험편 No. | 최초 코팅층 평균 두께(㎛) |
테스트 후 평균 코팅 두께(㎛) |
마모 시험 결과 (cycle) |
# 16 | 32 | 4 | 8,000 |
# 17 | 601 | 408 | 100,000 이상 |
# 18 | 592 | 296 | 80,000 이상 |
# 19 | 336 | 24 | 40,000 |
Claims (4)
- 강재의 표면 보호 및 보강을 위한 복합 필름에 있어서,상기 복합 필름은, 강재의 상부에 부착되는 제1 필름층;상기 제1 필름층의 상부에 위치하는 제2 필름층; 및상기 제2 필름층의 상부에 위치하는 그물망 구조를 갖는 메쉬 필름층;을 포함하며,상기 제1 필름층은 PE 고분자 50~85wt%와 무수말레산 12~45wt%를 포함하는 제1 고분자 혼합물로 제조되고,상기 제2 필름층은 PE 고분자를 포함하는 제2 고분자 혼합물로 제조되며,상기 메쉬 필름층은 합성수지 원사로 제직되되, 상기 합성수지 원사는 HDPE와 무기 충전제를 포함하고,상기 메쉬 필름층의 일부는, 상기 복합 필름의 가열 압착 과정을 거치면서 제2 필름층의 내부로 매립되는 것을 특징으로 하는, 복합 필름.
- 제1항에 있어서,상기 합성수지 원사의 비중이 제2 고분자 혼합물의 비중보다 큰 것을 특징으로 하는, 복합 필름.
- 제1항에 있어서,상기 제1 필름층과 제2 필름층에 포함되는 PE 고분자는 LLDPE인 것을 특징으로 하는, 복합 필름.
- 미경화 상태의 제1 필름층과 제2 필름층이 합지된 적층체를 제조하는 단계;상기 제2 필름층 상에 메쉬 필름층을 공급하고 압착하여 메쉬 필름층의 일부가 제2 필름층으로 매립된 복합 필름을 제조하는 단계; 및상기 복합 필름을 냉각하는 단계;를 포함하고,상기 적층체를 제조하는 단계는,제1 고분자 혼합물을 가열하고 필름 형태로 압출하는 제1 필름층 제조 단계;제2 고분자 혼합물을 가열하고 필름 형태로 압출하는 제2 필름층 제조 단계; 및제1 필름층과 제2 필름층을 합지하는 단계;를 포함하며제1 필름층과 제2 필름층은 PE 고분자를 포함하되, 상기 제1 고분자 혼합물은 PE 고분자 50~85wt%와 무수말레산 12~45wt%를 포함하고,상기 메쉬 필름층은 합성수지 원사로 제직되되, 상기 합성수지 원사는 HDPE와 무기 충전제를 포함하는 것을 특징으로 하는, 강재 코팅용 복합 필름의 제조 방법
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2022333724A AU2022333724B2 (en) | 2021-08-26 | 2022-06-20 | Composite film for coating steel product and method for manufacturing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020210112824A KR102345041B1 (ko) | 2021-08-26 | 2021-08-26 | 강재 코팅용 복합 필름 및 이의 제조 방법 |
KR10-2021-0112824 | 2021-08-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023027309A1 true WO2023027309A1 (ko) | 2023-03-02 |
Family
ID=79178748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2022/008713 WO2023027309A1 (ko) | 2021-08-26 | 2022-06-20 | 강재 코팅용 복합 필름 및 이의 제조 방법 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11718069B2 (ko) |
KR (1) | KR102345041B1 (ko) |
AU (1) | AU2022333724B2 (ko) |
WO (1) | WO2023027309A1 (ko) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102345041B1 (ko) * | 2021-08-26 | 2021-12-30 | 주식회사 픽슨 | 강재 코팅용 복합 필름 및 이의 제조 방법 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005096320A (ja) * | 2003-09-26 | 2005-04-14 | Nippon Zeon Co Ltd | 鋼材単層被覆用樹脂組成物及び被覆鋼材 |
KR100356909B1 (ko) * | 1998-12-29 | 2005-11-21 | 주식회사 포스코 | 피복파형강관용피복강판제조방법 |
KR20060106592A (ko) * | 2005-09-13 | 2006-10-12 | (주)픽슨 | 아연도 강판 및 이를 이용한 아연도금 나선형 파형강관 |
KR101128765B1 (ko) * | 2011-11-11 | 2012-03-28 | 주식회사 픽슨 | 망사가 적층된 필름을 제조하는 장치 및 그 방법 |
KR101134571B1 (ko) * | 2011-11-11 | 2012-07-13 | 주식회사 픽슨 | 망사가 적층된 아연 도금 강판 및 아연 도금 파형 강관 |
KR102345041B1 (ko) * | 2021-08-26 | 2021-12-30 | 주식회사 픽슨 | 강재 코팅용 복합 필름 및 이의 제조 방법 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4950541A (en) * | 1984-08-15 | 1990-08-21 | The Dow Chemical Company | Maleic anhydride grafts of olefin polymers |
US5750252A (en) * | 1995-06-02 | 1998-05-12 | The Dow Chemical Company | Protective coating for metal surfaces |
US7550533B2 (en) * | 2005-07-01 | 2009-06-23 | E. I. Du Pont De Nemours And Company | Composition comprising acid anhydride-grafted polyolefin |
KR101824002B1 (ko) | 2012-03-11 | 2018-02-01 | 주식회사 픽슨 | 코팅 강관 |
KR101356909B1 (ko) * | 2012-05-14 | 2014-01-28 | 주식회사 포스코 | 고청정 용강 정련장치 및 고청정 용강 제조방법 |
-
2021
- 2021-08-26 KR KR1020210112824A patent/KR102345041B1/ko active IP Right Grant
-
2022
- 2022-06-20 AU AU2022333724A patent/AU2022333724B2/en active Active
- 2022-06-20 WO PCT/KR2022/008713 patent/WO2023027309A1/ko active Application Filing
- 2022-06-28 US US17/851,971 patent/US11718069B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100356909B1 (ko) * | 1998-12-29 | 2005-11-21 | 주식회사 포스코 | 피복파형강관용피복강판제조방법 |
JP2005096320A (ja) * | 2003-09-26 | 2005-04-14 | Nippon Zeon Co Ltd | 鋼材単層被覆用樹脂組成物及び被覆鋼材 |
KR20060106592A (ko) * | 2005-09-13 | 2006-10-12 | (주)픽슨 | 아연도 강판 및 이를 이용한 아연도금 나선형 파형강관 |
KR101128765B1 (ko) * | 2011-11-11 | 2012-03-28 | 주식회사 픽슨 | 망사가 적층된 필름을 제조하는 장치 및 그 방법 |
KR101134571B1 (ko) * | 2011-11-11 | 2012-07-13 | 주식회사 픽슨 | 망사가 적층된 아연 도금 강판 및 아연 도금 파형 강관 |
KR102345041B1 (ko) * | 2021-08-26 | 2021-12-30 | 주식회사 픽슨 | 강재 코팅용 복합 필름 및 이의 제조 방법 |
Also Published As
Publication number | Publication date |
---|---|
AU2022333724A1 (en) | 2023-07-06 |
AU2022333724B2 (en) | 2024-06-27 |
KR102345041B1 (ko) | 2021-12-30 |
US11718069B2 (en) | 2023-08-08 |
US20230084163A1 (en) | 2023-03-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101311827B1 (ko) | 폴리올레핀 코팅된 패브릭 보강재 및 이로 보강된 시멘트질 보드들 | |
WO2023027309A1 (ko) | 강재 코팅용 복합 필름 및 이의 제조 방법 | |
US6764741B2 (en) | Laminated product having surface protection layer | |
KR100395314B1 (ko) | 적층체 | |
US20120311957A1 (en) | Anchoring method for external bonding and reinforcing technique with prestressed fiber cloth | |
WO2010002094A2 (ko) | 교량 또는 콘크리트 구조물의 교면방수 조성물을 이용한 교면 방수공법 | |
US20230107548A1 (en) | Structure Protection Sheet, Concrete Block, and Method for Manufacturing Reinforced Structure | |
WO2020080670A1 (ko) | 치수안정성 및 내마모성이 우수한 열가소성 폴리우레탄 친환경 바닥재 및 그의 제조방법 | |
WO2010114276A2 (ko) | 아라미드 복합재 및 그 제조방법 | |
KR20080010288A (ko) | 내오염성 및 내후성을 향상시킨 합성고분자계 지붕시트 및그 제조방법 | |
KR101617404B1 (ko) | 고분자 연성 적층체 | |
KR20010011802A (ko) | 표면재, 샌드위치 구조체, 이들을 이용한 제품 | |
WO2018044050A1 (ko) | 고정부재를 사용하지 않는 투습방수시트 및 이의 제조방법, 시공방법 | |
KR100607154B1 (ko) | 고무 아스팔트 도막 및 펠트 적층 방수재 및 그의 시공방법 | |
KR100976426B1 (ko) | 건축 구조물용 건식 복합 방수재, 이의 제조방법 및 이의 시공방법 | |
KR102477193B1 (ko) | 코팅 강판 및 이의 제조 방법 | |
CN111559150A (zh) | 一种高铁用高强度防水卷材及其制备方法 | |
CN111559131A (zh) | 弹性体改性预交联聚乙烯复合膜层及其制备方法和应用 | |
KR102392676B1 (ko) | 다층 구조를 갖는 방수방근 복합시트 및 이를 이용한 방수방근 시공방법 | |
KR102489422B1 (ko) | 파형 강관 및 이의 제조 장치 | |
JPH11348181A (ja) | ゴム特性を有する接合可能な弾性ラミネ―ト | |
KR101179122B1 (ko) | 합성섬유를 이용한 복합직물일체형방수시트 및 이를 이용한 시트방수공법 | |
KR101979412B1 (ko) | 탄성받침용 탄성복합구조체 및 이의 제조방법 | |
CN110626009B (zh) | 防水材料、其制备方法、防水卷材、复合防水搭接结构和防水结构的制备工艺 | |
KR20220093974A (ko) | 고분자 연성적층제를 이용한 차열 단열 방수시트 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22861523 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022333724 Country of ref document: AU Date of ref document: 20220620 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22861523 Country of ref document: EP Kind code of ref document: A1 |