WO2022014927A1 - Nbr 코팅 금속판 및 그 제조방법 - Google Patents
Nbr 코팅 금속판 및 그 제조방법 Download PDFInfo
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- WO2022014927A1 WO2022014927A1 PCT/KR2021/008515 KR2021008515W WO2022014927A1 WO 2022014927 A1 WO2022014927 A1 WO 2022014927A1 KR 2021008515 W KR2021008515 W KR 2021008515W WO 2022014927 A1 WO2022014927 A1 WO 2022014927A1
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- nbr
- metal plate
- rubber
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- parts
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- 239000002184 metal Substances 0.000 title claims abstract description 135
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 135
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 146
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000001035 drying Methods 0.000 claims abstract description 31
- 239000010410 layer Substances 0.000 claims abstract description 28
- 239000011247 coating layer Substances 0.000 claims abstract description 25
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- 238000004132 cross linking Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 238000010030 laminating Methods 0.000 claims abstract description 8
- 229920001971 elastomer Polymers 0.000 claims description 82
- 239000005060 rubber Substances 0.000 claims description 82
- 239000011248 coating agent Substances 0.000 claims description 47
- 238000000576 coating method Methods 0.000 claims description 46
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 5
- 150000002978 peroxides Chemical class 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000003584 silencer Effects 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 16
- 125000000524 functional group Chemical group 0.000 abstract 1
- 239000010408 film Substances 0.000 description 75
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 238000010073 coating (rubber) Methods 0.000 description 7
- 238000004073 vulcanization Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003738 black carbon Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- 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
- B32B37/26—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 which influences the bonding during the lamination process, e.g. release layers or pressure equalising layers
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
-
- 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
- B32B15/06—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 natural rubber or synthetic rubber
-
- 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
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- 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
- B32B37/144—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- B32B37/26—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 which influences the bonding during the lamination process, e.g. release layers or pressure equalising layers
- B32B2037/268—Release layers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2309/02—Copolymers with acrylonitrile
Definitions
- the present invention relates to an acrylonitrile butadiene rubber (NBR) coated metal plate and a method for manufacturing the same, and more particularly, a liquid rubber solution is coated on a release film, laminated with a metal plate without an adhesive, and cross-linked with NBR coating with excellent adhesion to the metal plate It relates to a metal plate and a method for manufacturing the same.
- NBR acrylonitrile butadiene rubber
- the rubber-coated metal plate was developed for the purpose of sealing that requires heat resistance, such as an engine gasket, and by expanding its use, it is also used for heat resistance, oil resistance and noise attenuation, such as a brake shim, so the range of use is expanding.
- NBR rubber requires various properties such as chemical resistance, oil resistance, heat resistance, and vibration absorption.
- a rubber sheet having a certain thickness is pulled out through a calendar process, and when compressed at a certain temperature and time using a vulcanization facility, cross-linking occurs to give elasticity to the rubber
- a rubber-coated metal plate was manufactured by producing a sheet, laminating it with a metal plate using an adhesive, and coating a liquid rubber solution on one or both sides of the metal plate and then drying and crosslinking.
- the method of coating the liquid rubber liquid on the metal plate is to use a roll coater to coat in multiple stages or to coat a certain thickness at a time, depending on the equipment and purpose, or use a spray coater to directly coat the metal surface. way to do it
- the rubber sheet manufactured using the calendar process and vulcanization equipment has a thickness of 3 mm or more, and there is a limit in producing a thin rubber coating film of 0.05 mm to 0.2 mm required by the present invention.
- an adhesive since an adhesive must be used to bond the metal plate and the rubber sheet, there is a disadvantage in that the material cost and the bonding process are added.
- the comma coater method in which a metal plate and a comma coater are coated at regular intervals, can be easily coated on the upper surface of the metal plate to a desired thickness. There is a difference in the coating thickness, and the coating thickness of rubber varies according to the thickness of the metal material, so there is a limit to producing a rubber-coated metal product with a uniform thickness.
- Patent Document 0001 Korean Patent No. 10-1913554
- the present invention is to provide a method for manufacturing an NBR-coated metal plate in which a rubber coating is applied to a uniform thickness using a release film and sulfur-free crosslinking is performed, rather than directly applying a rubber coating to a metal plate and performing vulcanization crosslinking.
- the method for manufacturing an NBR-coated metal plate according to the present invention for solving the above problems comprises: preparing a base film 10 and a release film 30 having a release layer 20 formed on the base film; forming an NBR coating layer 40 by applying a liquid NBR (acrylonitrile butadiene rubber) composition containing a carboxysil reactor on the release layer 20 of the release film 30; Drying the NBR coating layer on the release film 30 to prepare a non-crosslinked NBR coating film having a thickness of 0.05 mm to 0.2 mm; Laminating the NBR coating film by heating and pressing on one side or both sides of the metal plate (60); It characterized in that it comprises the step of removing the release film 30 and the step of crosslinking by heating the laminated NBR coated metal plate in a range of 160 °C to 250 °C.
- the base film is characterized in that it includes PET, OPP, PEN, PI, and paper.
- the liquid NBR composition is characterized in that the content of the carboxyl reactor is 5 to 8 parts by weight based on 100 parts by weight of the liquid NBR, and the Mooney viscosity at 100° C. is 30 to 55.
- the liquid NBR composition includes 17 parts by weight to 25 parts by weight of the NBR resin, 55 parts by weight to 73 parts by weight of the toluene solvent, and 5 parts by weight to 20 parts by weight of the methyl ethyl ketone (MEK) leveling agent based on 100 parts by weight of the liquid NBR. It is characterized by containing wealth.
- MEK methyl ethyl ketone
- the liquid NBR composition is characterized in that it contains 0.4 parts by weight to 1 part by weight of peroxide based on 100 parts by weight.
- Drying of the NBR coating layer drying in the range of 40 °C to 70 °C; drying in the range of 70°C to 90°C; drying in the range of 90°C to 110°C; It is characterized in that it comprises the step of drying in the range of 110 °C to 140 °C and cooling drying in the range of 20 °C to 50 °C.
- the NBR coating film is not cross-linked in the intermediate step prepared by the above manufacturing method.
- the non-crosslinked NBR coating film is applied to rubber parts including vibration-proof rubber, brake shim rubber, and automobile sealing rubber.
- the gasket of the engine of a car or railway or ship to which the NBR-coated metal plate is applied includes anti-vibration metal plates for automobiles, anti-vibration metal plates for railways, dust-proof metal plates for industrial equipment, and dust-proof metal plates for buildings to which NBR-coated metal plates are applied.
- a brake shim made of an NBR-coated metal plate and a brake device using the brake shim are characterized.
- the NBR-coated metal plate according to the present invention does not have a problem of scattering sulfurous acid gas and sulfur generated in the vulcanization and crosslinking process, preventing corrosion of production facilities and being environmentally friendly, thereby protecting the health of workers.
- a thin rubber layer of 1 mm or less can be coated with a uniform thickness by using a PET release film without directly rubber coating on the metal plate even if a comma coater is used. Therefore, rubber can be coated regardless of the shape or thickness deviation of the metal plate.
- the conventional laminate integration process by attaching a rubber sheet or rubber film to a metal plate goes through several processes such as applying an adhesive, drying, curing, etc.
- the present invention is economical by lowering the manufacturing cost by integrating the rubber and the metal plate with a simple process of heating and pressing without an adhesive by containing a carboxyl reactor that improves adhesion to the metal plate in the rubber solution.
- it is possible to simultaneously heat and press laminate on one or both sides of the metal plate it is possible to very effectively shorten the production process and reduce the manufacturing cost.
- the rubber film containing the carboxyl reactor coated as a thin film on the release film can be easily applied to other purposes other than the brake shim because it is easy to mold with other rubber materials or bond with other materials.
- the NBR-coated metal plate is used as a vibration-proof metal material and is used as a member of equipment including a brake shim, and has a remarkable effect of absorbing vibration and damping friction noise.
- FIG. 1 is a flowchart of a method for manufacturing an NBR-coated metal plate according to the present invention.
- Figure 2 (a) is a cross-sectional view of the release film, (b) is a cross-sectional view of the NBR coating layer coated with a liquid NBR composition on the release film.
- 3 is a cross-sectional view of the manufacturing of the NBR-coated metal plate.
- release film 40 NBR coating layer
- the present invention comprises the steps of preparing a release film 30 having a base film 10 and a release layer 20 formed on the base film; forming an NBR coating layer 40 by applying a liquid NBR (acrylonitrile butadiene rubber) composition containing a carboxysil reactor on the release layer of the release film; Drying the NBR coating layer on the release film 30 to prepare a non-crosslinked NBR coating film having a thickness of 0.05 mm to 0.2 mm; Laminating the NBR coating film by heating and pressing on one side or both sides of the metal plate (60); It characterized in that it comprises the step of removing the release film and the step of crosslinking by heating the laminated NBR coated metal plate in a range of 160 °C to 250 °C.
- NBR acrylonitrile butadiene rubber
- a method of coating rubber on a metal plate or metal coil like a brake shim is possible with the comma coater method. There are limits to the production of products.
- the present invention does not directly apply a rubber coating to a metal plate and perform vulcanization crosslinking, but rather coating an NBR rubber with a uniform thickness using a release film and attaching it to a metal plate and then crosslinking the NBR-coated metal plate We want to provide a way.
- the rubber used in the present invention is a synthetic rubber with strong abrasion resistance, heat resistance and oil resistance, and NBR (acrylonitrile butadiene rubber) resin is used.
- NBR is a rubbery substance obtained by hybrid polymerization in a molar ratio of 2:1 or 3:1 of butadiene and acrylonitrile.
- a liquid NBR composition is prepared by dissolving NBR rubber in a solvent for coating the NBR thin film on the release film.
- the liquid NBR composition contains 5 to 8 parts by weight of a carboxysil reactor based on 100 parts by weight of the liquid NBR composition in order to attach to a metal plate without an adhesive to provide adhesion, and to produce a thin film.
- the Mooney viscosity is about 30 to 55 at 100°C.
- the NBR rubber resin is adjusted to be 17 to 25 parts by weight based on 100 parts by weight of the liquid NBR composition.
- the liquid solvent uses 55 to 73 parts by weight of toluene based on 100 parts by weight of the liquid NBR composition to uniformly dissolve the rubber liquid and lower the viscosity to enable coating with a thin film, and improve the leveling property of the rubber liquid to make it uniform 5 to 20 parts by weight of MEK, a leveling agent, may be optionally used to enable one coating.
- silica 2 to 5 parts by weight may be contained based on 100 parts by weight of the liquid NBR composition in order to improve the cohesion of the NBR rubber.
- black carbon ink may be added based on 100 parts by weight of the liquid NBR composition.
- the present invention does not use sulfur as a crosslinking agent for rubber, and contains 0.4 parts by weight to 1 part by weight based on 100 parts by weight of the liquid NBR composition using peroxide as a crosslinking agent.
- the crosslinking agent also serves to improve the tensile strength of rubber and to make the rubber dense to improve oil resistance, heat resistance, and adhesion to metal plates.
- the peroxide may be at least one selected from benzoyl peroxide, dibenzoyl peroxide, di-tert-butyl peroxide, dicumyl peroxide, and cumene hydroperoxide, or a combination thereof.
- the release film 30 has a release layer 20 formed on the base film 10 .
- the base film may be selectively used from films including PET, OPP, PEN, PI, and paper, and PET is preferable in consideration of the manufacturing process or economic feasibility.
- the release layer can be formed of silicone-based, fluorine-based, acrylic-based, urethane-based, etc., and it is economical to use silicone-based in view of cost, but fluorine-based, etc. may be used according to the purpose of the rubber solution or purpose.
- a release paper in which a silicone-based release layer is formed on PE after PE coating on paper may be used. It has releasability and can be coated with a liquid NBR composition. After drying, there is no problem in the formation of an NBR coating film. After laminating with a metal, as long as the NBR coated rubber and the release film are easily separated, any material can be used.
- the metal plate 60 according to the present invention may be made of stainless steel, a cold rolled steel plate (SPCC), or a cold rolled steel plate coated with zinc.
- the thickness of the metal plate may be selectively used according to the design of the product and the metal strength, and a thickness of 0.1 mm to 1.0 mm is usually used. If it is too thin or thick, the strength is weak, and the role of friction and noise attenuation during brake operation is small. Preferably, a thickness of 0.3 mm to 0.8 mm is used.
- FIG. 1 is a flowchart of a method for manufacturing an NBR-coated metal plate according to the present invention.
- a non-crosslinked intermediate NBR coating film is prepared through a step of drying the NBR coating layer on the release film.
- the intermediate stage NBR coated film can be used for many purposes other than brake shims.
- the crosslinked NBR coating layer is denoted by a reference numeral '50'.
- FIG. 2 is a cross-sectional view of a non-crosslinked NBR coated film
- FIG. 2 (a) is a cross-sectional view of a release film 30 composed of a base film 10 and a release layer 20
- FIG. 2 (b) is the release
- a cross-sectional view of the NBR coating layer 40 formed on the release layer 20 of the film a liquid NBR composition containing a carboxyl reactor was applied and dried on the release layer 20 of the release film 30. is schematically shown.
- the brake shim plays a role in reducing or damping noise generated by friction between the brake pad and the disk during disc brake operation.
- the noise reduction and damping is due to the rubber layer. If the thickness of the rubber layer is too thin, the noise damping performance deteriorates, and if the thickness of the rubber layer is too thick, the hydraulic piston presses the brake shim when the brake is operated, and the hydraulic piston is severely pressed against the brake shim, thereby reducing the brake operation ability. Therefore, the thickness of the rubber layer should be appropriate, but a thickness of 0.05 to 0.2 mm is preferable.
- Example 1 The heat resistance in Example 1 below has better heat resistance as the Mooney viscosity is lowered, and in Example 2, the adhesion between the rubber and the metal plate is based on 100 parts by weight of the liquid NBR composition based on the content of the carboxyl reactive group in the NBR resin. It can be confirmed that the best when 5 to 8 parts by weight.
- the manufacturing method of the NBR coating film 50 using the liquid NBR composition is a liquid NBR composition containing carboxyl on the release layer 20 of the release film 30 using a coater to a thickness of 0.05 mm to Coat it so that it becomes 0.2mm and dry it.
- a comma coater, a kiss coater, a slot die coater, etc. can be selectively applied, and in addition to the above coater, all of them can be used as long as the target thickness can be achieved. It is classified as post-weighing painting by scraping it off with a blade according to the desired amount after applying it generously. Since it is a rolling method in which a coating agent is directly put on the upper surface of the substrate and the coating thickness is adjusted by adjusting the gap between the substrate and the coater, it is difficult to maintain an appropriate thickness. When the thickness of a metal plate or metal coil with a high hardness of the substrate is thick, the coating thickness becomes thinner by narrowing the gap with the coater.
- the present invention uses a PET release film as a coating substrate to overcome the above problems, there is little or negligible variation in the thickness of the PET film, so there is little change in the gap between the PET film and the coater, so that a relatively uniform coating product can be obtained.
- the drying process after coating may utilize a hot air blower or a drying chamber. In order to obtain a smooth and clean surface with the applied rubber solution, it is necessary to control the drying temperature.
- Preferred methods of drying by heating include drying at a temperature in the range of 40 °C to 70 °C, drying at a temperature in the range of 70 °C to 90 °C, drying at a temperature in the range of 90 °C to 110 °C, at a temperature in the range of 110 °C to 140 °C It is possible to obtain the non-crosslinked NBR coating layer 40 by volatilizing only the solvent, including the step of drying in a temperature range of 20 °C to 50 °C and cooling in the temperature range.
- the brake shim uses a process of crosslinking rubber through a vulcanization reaction, then attaching it to a metal plate using an adhesive and heating it.
- the present invention contains a carboxyl reactor that improves adhesion with a metal plate 60 in NBR rubber solution without using an adhesive after crosslinking as described above, so that the NBR coating film 50 and the metal plate 60 are prepared without an adhesive. It is possible to lower the manufacturing cost by performing the laminate integration process with a simple process of only heating and pressing. In addition, since it is possible to simultaneously heat and press laminate on one or both sides of the metal plate, it is possible to very effectively shorten the production process and reduce the manufacturing cost.
- the present invention prepares an NBR coating film containing uncrosslinked carboxyl, and maintains adhesion between metal and metal when heated and pressurized, and hardens during crosslinking to improve adhesion to metal. That is, it is cross-linked after being attached to the metal to increase the adhesion.
- FIG. 3 is a cross-sectional view of an NBR-coated metal plate.
- the NBR coating layer 40 and the metal plate 60 of the NBR coating film are laminated by heat and pressure to be attached, and the release film is peeled off and cross-linked as shown in FIG. 3 (a).
- the release film is peeled off and cross-linked as shown in FIG. 3 (a).
- the step of laminating the NBR coating film and the metal plate 60 uses one of the following methods.
- the metal plate 60 and the NBR coating layer 40 of the non-crosslinked NBR coating film are integrated with a hot pressing roll maintained at a temperature of 160° C. to 250° C. so that the metal plate 60 is attached to it.
- the NBR coating layer 40 of the NBR coating film is a metal plate ( 60) to be laminated and integrated.
- Figure 3 (b) shows a laminate on one side of the metal plate 60
- Figure 3 (c) shows a laminate on both sides.
- Rubber-coated metal plate is formed by crosslinking by maintaining the temperature of rubber and metal at 180°C to 250°C for 1 to 4 minutes with a hot air device, NIR (near infrared) heater, or a device that combines a hot air device and NIR heater. manufacture When crosslinking without removing the release film, crosslinking gas generated during rubber crosslinking is not discharged, so bubbles are generated on the rubber surface, causing stains or crosslinking is not performed properly. do.
- the NBR coating film and the metal plate 60 are integrated with the NBR coating film and the metal plate 60 by heating and pressing each or simultaneously so that the NBR coating layer 40 of the NBR coating film is attached to the metal plate 60 on both sides of the metal plate 60 and the release film is removed. After heat crosslinking, as shown in FIG. 3(c), a double-sided rubber-coated metal plate can be manufactured.
- Both the single-sided NBR-coated metal plate and the double-sided NBR-coated metal plate manufactured by the above method can be used as materials for vibration-proof metal including vibration-proof metal for automobiles, vibration-proof metal for railroads, vibration-proof metal for industrial equipment, and vibration-proof metal for buildings.
- the NBR-coated metal plate manufactured by the above method may be used as a member of equipment including engine gaskets, silencer mounting pads, transmission gaskets, and brake shims of automobiles, railways, and ships.
- NBR rubber solution After preparing NBR rubber solution by dissolving NBR resin with different Mooney viscosity in a solvent, 0.7 parts by weight of peroxide is added as a crosslinking agent, and the mixed rubber solution is applied on the release layer 20 of the release film 30 and dried.
- the metal plate 60 preheated to 160° C. and the NBR coating film are heated to a temperature A heating roll maintained at 160°C was rolled under a load of 5 kgf to integrate rubber and metal plate into laminate, and then the release film was removed and charged in a 200°C chamber for 3 minutes for crosslinking.
- Example 1 the heat resistance of the rubber was the best when the Mooney viscosity was 33 to 55, but the adhesion to the metal plate was insufficient.
- a liquid NBR was prepared in the same manner as in Example 1, and a rubber solution obtained by adjusting the Mooney viscosity difference and the carboxyl content of NBR was prepared and tested in the same manner as in Example 1, and the evaluation results are shown in Table 2. It was
- the liquid NBR of the present invention has a carboxyl reactor content of 0.05% to 0.08%, and a Mooney viscosity of 30 to 55 at 100 ° C. was found to be the most desirable.
- the NBR-coated metal plate and its manufacturing method according to the present invention do not have a problem of scattering of sulfurous acid gas and sulfur generated in the vulcanization and crosslinking process, preventing corrosion of production facilities and being eco-friendly, so it is possible to protect the health of workers, Even if a comma coater is used, it is possible to apply a rubber coating with a uniform thickness of a thin rubber layer of 1 mm or less by using a PET release film without directly coating the rubber on the metal plate. It can be coated, and it is an invention with very high industrial applicability because it is economical by lowering manufacturing costs by integrating rubber and metal plates with a simple process of heating and pressing without adhesives, and at the same time shortens the production process and reduces manufacturing costs.
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Abstract
Description
Claims (13)
- 기재필름(10)과 상기 기재필름상에 이형층(20)이 형성된 이형필름(30)을 준비하는 단계;상기 이형필름의 이형층상에 카보키실 반응기가 함유된 액상의 NBR(acrylonitrile butadiene rubber) 조성물을 도포하여 NBR 코팅층(40)을 형성시키는 단계;상기 이형필름(30) 위의 NBR 코팅층을 건조하여 두께가 0.05mm 내지 0.2mm인 가교가 안 된 NBR 코팅 필름을 제조하는 단계;상기 NBR 코팅 필름을 금속판(60)의 일면 또는 양면에 가열 가압하여 라미네이트하는 단계;상기 이형필름을 제거하는 단계 및상기 라미네이트된 NBR 코팅 금속판을 160℃ 내지 250℃ 범위에서 가열하여 가교하는 단계를 포함하는 것을 특징으로 하는 NBR 코팅 금속판 제조방법.
- 제1항에 있어서,상기 기재필름은 PET, OPP, PEN, PI, 종이를 포함하는 것을 특징으로 하는 NBR 코팅 금속판 제조방법.
- 제1항에 있어서,상기 액상의 NBR 조성물은 액상 NBR 중량부 100 기준으로 카보키실 반응기의 함량이 5 중량부 내지 8 중량부이고, 100℃에서 무니(mooney) 점도가 30 내지 55인 것을 특징으로 하는 NBR 코팅 금속판 제조방법.
- 제1항에 있어서,상기 액상 NBR의 조성물은,액상 NBR 중량부 100 기준으로 NBR 수지가 17 중량부 내지 25 중량부, 톨루엔 용제가 55 중량부 내지 73 중량부, 메틸에틸케톤(MEK) 레벨링제가 5 중량부 내지 20 중량부를 함유하는 것을 특징으로 하는 NBR 코팅 금속판 제조방법.
- 제1항에 있어서,상기 액상의 NBR 조성물은 중량부 100 기준으로 0.4 중량부 내지 1 중량부의 과산화물을 포함하는 것을 특징으로 하는 NBR 코팅 금속판 제조방법.
- 제1항에 있어서,상기 NBR 코팅층을의 건조는,40℃ 내지 70℃ 범위에서 건조하는 단계;70℃ 내지 90℃ 범위에서 건조하는 단계;90℃ 내지 110℃ 범위에서 건조하는 단계;110℃ 내지 140℃ 범위에서 건조하는 단계 및20℃ 내지 50℃ 범위에서 냉각 건조하는 단계를 포함하는 것을 특징으로 하는 NBR 코팅 금속판 제조방법.
- 제1항의 방법으로 제조된 중간 단계의 가교가 안 된 NBR 코팅 필름.
- 제7항의 NBR 코팅 필름이 적용된 방진용 고무, 브레이크 심용 고무, 자동차 실링용 고무를 포함한 고무 부품.
- 제1항의 방법으로 제조된 NBR 코팅 금속판.
- 제9항의 NBR 코팅 금속판이 적용된 자동차 또는 철도 또는 선박의 엔진의 가스켓, 브레이크, 소음장치 장착패드, 완충장치, 변속기 가스켓, 브레이크 심을 포함하는 차량 부품.
- 제9항의 NBR 코팅 금속판이 적용된 자동차용 방진금속판, 철도용 방진금속판, 산업장비용 방진금속판 및 건물용 방진금속판을 포함하는 방진금속 부품.
- 제9항의 NBR 코팅 금속판으로 제조된 브레이크 심.
- 제12항의 브레이크 심을 사용한 브레이크 장치.
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