Method of degreasing and cleanising for aluminum materials

Abstract

The present invention relates to a method for degreasing and cleaning aluminum materials applied as covers for air conditioner filters for semiconductor processes, and more specifically, comprises a jig insertion step of inserting an aluminum material part into a jig; a degreasing and cleaning step of immersing the jig containing the aluminum material part inserted through the jig insertion step into a degreasing and cleaning agent composition to degrease and clean; a washing step of washing the aluminum material part degreasing and cleaning through the degreasing and cleaning step; and a neutralization step of immersing the aluminum material part washed through the washing step into a neutralizing solution to neutralize it. The degreasing and cleaning method for aluminum materials carried out through the above process provides excellent degreasing and cleaning effects for aluminum materials applied as covers for air conditioner filters for semiconductor processes, and does not cause surface discoloration, thereby providing high-quality aluminum materials, and also has the effect of dramatically improving throughput by using a jig with an efficiently improved racking cassette area.

Description

Technology Field

[0001] The present invention relates to a method for degreasing and cleaning aluminum materials, and more specifically, to a method for degreasing and cleaning aluminum materials that exhibits an excellent degreasing and cleaning effect on aluminum materials applied as covers for air conditioner filters for semiconductor processes, and can maintain excellent quality by not causing surface discoloration, as well as significantly improving throughput by using a jig with an efficiently improved racking cassette portion.

[0002] delete Background Technology

[0003] The covers of air conditioner filters for semiconductor processes are used to remove contaminated air and chemical gases introduced into the air conditioners and are made of aluminum. Since machining oil and perforation oil remain on the surface of these covers during the processing and perforation stages, they are removed by degreasing and cleaning during the surface treatment process.

[0004] Generally, the cover of an air conditioner filter for semiconductor processes consists of a filter cover and a filter inner cover as a set of two, but conventionally, the filter cover and the filter inner cover are hung separately on a jig to perform degreasing and cleaning treatment.

[0005] In addition, conventional degreasing cleaning consists of a three-stage process of racking / jigging the air conditioner filter cover for semiconductor processes, degreasing, washing, and drying. However, not only are residual oil components on the air conditioner filter cover for semiconductor processes not completely removed, but there is also a problem of reduced productivity because the filter cover and the filter inner cover must be hung separately during product racking.

[0006] If oil components are not properly removed from the cover of the air conditioner filter for semiconductor processes, deformation of the products may occur due to slippage between products during transportation after packaging and stacking. Additionally, after application as a cover for the air conditioner filter, there was a problem where the air conditioner, which is supposed to supply clean air, became contaminated due to oil components adsorbed on the surface of the cover.

[0007] delete Prior art literature

[0008] Korean Patent Registration No. 10-0690271 (Feb. 27, 2007) Korean Patent Registration No. 10-2049823 (Nov. 22, 2019) The problem to be solved

[0009] The objective of the present invention is to provide a method for degreasing and cleaning aluminum materials that exhibits an excellent degreasing and cleaning effect on aluminum materials applied as covers for air conditioner filters for semiconductor processes, while maintaining excellent quality by not causing surface discoloration, and also significantly improving throughput by using a jig with an efficiently improved racking cassette portion.

[0010] delete means of solving the problem

[0011] The objective of the present invention is achieved by providing a method for degreasing and cleaning an aluminum material, characterized by comprising: a jig insertion step of inserting an aluminum material part into a jig; a degreasing and cleaning step of immersing the jig containing the aluminum material part inserted through the jig insertion step into a degreasing and cleaning agent composition to degrease and clean; a washing step of washing the aluminum material part degreasing and cleaning through the degreasing and cleaning step; and a neutralization step of immersing the aluminum material part washed through the washing step into a neutralizing solution to neutralize it.

[0012] According to a preferred feature of the present invention, the degreasing and cleaning step is performed by immersing a jig in which an aluminum material part is interposed through the jig interposition step in a degreasing and cleaning agent composition at 25 to 35°C for 15 to 25 minutes.

[0013] According to a more preferred feature of the present invention, the degreasing and cleaning step is performed under conditions where air is introduced through a blower.

[0014] According to a more preferred feature of the present invention, the degreasing detergent composition comprises 100 parts by weight of sodium carbonate, 8 to 12 parts by weight of sodium hydroxide, 70 to 80 parts by weight of sodium metasilicate, 140 to 160 parts by weight of sodium triphosphate, and 50 to 70 parts by weight of a surfactant.

[0015] According to a more preferred feature of the present invention, the surfactant is formed by mixing 100 parts by weight of polyoxyethylene alkyl ether with 100 to 200 parts by weight of sodium alkyl naphthalene sulfonate.

[0016] According to a more preferred feature of the present invention, the neutralization step is performed by immersing the aluminum material part cleaned through the washing step in a neutralization solution at 25 to 35°C for 30 to 60 seconds.

[0017] According to a more preferred feature of the present invention, the neutralizing solution is composed of 13 to 17 weight percent sulfuric acid, 4 to 6 weight percent chromic acid, and the remainder being purified water. Effects of the invention

[0019] The degreasing and cleaning method for aluminum materials according to the present invention exhibits an excellent degreasing and cleaning effect on aluminum materials applied as covers for air conditioner filters for semiconductor processes, etc., while not causing surface discoloration, thereby maintaining the quality of the aluminum material. Furthermore, by using a jig with an efficiently improved racking cassette section, the throughput can be dramatically improved.

[0020] delete Brief explanation of the drawing

[0021] FIG. 1 is a flowchart illustrating a method for degreasing and cleaning aluminum material according to the present invention. FIG. 2 is a partial enlarged view showing the state in which an aluminum material is interposed in the jig used in the present invention. Figure 3 is a photograph showing the state in which an aluminum material is interposed in the jig used in the present invention. Specific details for implementing the invention

[0022] Hereinafter, preferred embodiments of the present invention and the physical properties of each component are described in detail. This description is intended to be sufficient for a person skilled in the art to easily practice the invention, and does not imply that the technical scope and concept of the present invention are limited thereby.

[0024] The degreasing and cleaning method for an aluminum material according to the present invention comprises a jig insertion step (S101) of inserting an aluminum material part into a jig, a degreasing and cleaning step (S103) of immersing the jig containing the aluminum material part inserted through the jig insertion step (S101) into a degreasing and cleaning agent composition to degrease and clean, a washing step (S105) of washing the aluminum material part degreasing and cleaning through the degreasing and cleaning step (S103), and a neutralization step (S107) of immersing the aluminum material part washed through the washing step (S105) into a neutralizing solution to neutralize it.

[0026] The above jig insertion step (S101) is a step of inserting an aluminum material part into a jig. As shown in Figures 2 and 3 below, the throughput of the aluminum material part can be dramatically improved by using a jig in which the racking cassette portion is efficiently improved so that the filter cover and filter inner cover of the air conditioner filter for semiconductor processes made of aluminum material can be hung without separating them.

[0027] In contrast to conventional jigs that are generally used and consist of three layers, allowing one product to be hung in each of the 15 compartments, thereby enabling a total of 45 products to be hung and immersed in a degreasing and cleaning agent composition for processing, the jig used in the present invention adjusts the racking spacing of aluminum parts to ensure that the degreasing and cleaning process is maintained smoothly even inside the parts. Furthermore, since it is formed with 68 compartments and allows cleaning without separating the filter cover and filter inner cover of the air conditioner filter, it is possible to process 136 aluminum parts compared to conventional jigs.

[0028] In addition, since the jig formed in the above shape creates a certain space between the aluminum parts, not only is the degreasing and cleaning effect increased, but the efficiency of the drying process performed after the degreasing and cleaning process is also significantly improved.

[0030] The above degreasing and cleaning step (S103) is a step of degreasing and cleaning by immersing the jig containing the aluminum material part in the above jig insertion step (S101) in a degreasing and cleaning agent composition, and it is preferable that the jig containing the aluminum material part in the above jig insertion step (S101) is immersed in a degreasing and cleaning agent composition at 25 to 35°C for 15 to 25 minutes.

[0031] At this time, the degreasing detergent composition contains sodium carbonate, sodium hydroxide, sodium metasilicate, sodium triphosphate, and a surfactant, and preferably contains 100 parts by weight of sodium carbonate, 8 to 12 parts by weight of sodium hydroxide, 70 to 80 parts by weight of sodium metasilicate, 140 to 160 parts by weight of sodium triphosphate, and 50 to 70 parts by weight of a surfactant.

[0032] The above sodium carbonate not only removes mineral oil remaining on the surface of aluminum materials but also improves the dispersion and adsorption performance of the degreasing detergent composition, thereby improving the efficiency of mineral oil removal.

[0033] The above sodium hydrooxide is contained in an amount of 8 to 12 parts by weight, acts as an alkali agent, and serves to remove oily components remaining on the surface of the aluminum material.

[0034] The above sodium hydroxide has a solubility of 42g (0℃), 109g (20℃), and 347g (100℃) per 100g of water, and exhibits the characteristic of being soluble in ethanol but not in ether or acetone. It exhibits an excellent removal effect on oil components remaining on the surface of aluminum materials through a saponification reaction. However, if the content of the above sodium hydroxide is less than 8 parts by weight, the above effect is negligible, and if the content of the above sodium hydroxide exceeds 12 parts by weight, the above effect is not significantly improved, and corrosion may occur on the aluminum material, which is undesirable.

[0035] The above sodium metasilicate is contained in an amount of 70 to 80 parts by weight and serves to remove mineral oil remaining on the surface of the aluminum material, and it is preferable to use the sodium metasilicate in the form of a pentahydrate.

[0036] The above sodium metasilicate pentahydrate has excellent water-immersion properties and exhibits an excellent removal effect on mineral oil components remaining on the surface of aluminum materials.

[0037] If the content of the sodium metasilicate is less than 70 parts by weight, the above effect is negligible, and if the content of the sodium metasilicate exceeds 80 parts by weight, the above effect is not significantly improved, and the content of sodium hydroxide or sodium triphosphate is reduced excessively, which is undesirable because the uniformity or cleaning power of the degreasing cleaning agent composition may be reduced.

[0038] The above sodium tripolyphosphate is contained in an amount of 140 to 160 parts by weight and has excellent cleaning and dispersibility, which improves the efficiency of removing mineral oil remaining on the surface of aluminum materials. The above sodium tripolyphosphate is a phosphate, so it can efficiently remove mineral oil through an emulsification reaction with the mineral oil.

[0039] If the content of the sodium triphosphate is less than 140 parts by weight, the above effect is negligible, and if the content of the sodium triphosphate exceeds 160 parts by weight, the above effect is not significantly improved, and the content of sodium hydroxide, sodium metasilicate, and sodium carbonate is reduced relatively, which is undesirable because the cleaning effect of oil components, etc. may be reduced.

[0040] The above surfactant is preferably composed of a material that contains 50 to 70 parts by weight and improves workability by exhibiting low foaming and non-ionic properties, while also improving cleaning effects through a wetting action that lowers the interfacial tension of oil components remaining on the surface of the aluminum material to remove them.

[0041] At this time, the surfactant is preferably selected from the group consisting of polyoxyethylene alkyl ether, which is low-foaming and non-ionic and has some of its components substituted with anions, and sodium alkyl naphthalene sulfonate, which exhibits excellent performance in removing other pollutants other than organic matter; it is even more preferable to mix 100 to 200 parts by weight of sodium alkyl naphthalene sulfonate with 100 parts by weight of polyoxyethylene alkyl ether.

[0042] If the content of the surfactant is less than 50 parts by weight, the above effect is negligible, and if the content of the surfactant exceeds 70 parts by weight, the above effect is not significantly improved, and the content of sodium hydroxide, sodium metasilicate, sodium carbonate, and sodium triphosphate is excessively reduced, which is undesirable because it may lower the performance of the degreasing detergent composition.

[0043] A degreasing cleaning agent composition for aluminum materials composed of the above ingredients is manufactured by adding 8 to 12 parts by weight of sodium hydroxide to a powder manufacturing container, adding 70 to 80 parts by weight of sodium metasilicate, 100 parts by weight of sodium carbonate, 140 to 160 parts by weight of sodium triphosphate, and 50 to 70 parts by weight of a surfactant in sequence while stirring with a mixer, and stirring at a speed of 300 to 500 rpm for 100 to 150 minutes after the addition of the surfactant is completed, and the degreasing cleaning agent composition manufactured through the above process is manufactured in powder form.

[0044] At this time, the degreasing detergent composition can also be manufactured in a liquid form, which is prepared by mixing 100 parts by weight of water with 100 parts by weight of the powdered degreasing detergent composition manufactured through the above process. More specifically, the process is carried out by mixing 300 to 350 parts by weight of water in a liquid preparation container, adding 8 to 12 parts by weight of sodium hydroxide, stirring with a mixer, adding 70 to 80 parts by weight of sodium metasilicate, 100 parts by weight of sodium carbonate, 140 to 160 parts by weight of sodium triphosphate, and 50 to 70 parts by weight of surfactant in sequence, and after the addition of the surfactant is completed, adding an additional 70 to 80 parts by weight of water and stirring at a speed of 300 to 500 rpm for 15 to 25 minutes.

[0045] In the above degreasing cleaning step (S103), if the temperature of the degreasing cleaning agent composition is less than 25°C or the immersion time is less than 15 minutes, the effect of removing oil components or foreign substances remaining on the aluminum material parts is negligible, and if the temperature of the cleaning agent composition exceeds 35°C or the immersion time exceeds 25 minutes, the above effect is not significantly improved and is undesirable in terms of energy efficiency or process efficiency.

[0046] In addition, the degreasing and cleaning step (S103) is more preferably performed under conditions where air is introduced through a blower. When air is introduced through a blower as described above, the flowability of the degreasing and cleaning agent composition increases and a vortex is formed, which can further enhance the degreasing and cleaning effects.

[0048] The washing step (S105) above is a step of washing an aluminum material part that has been degreased through the degreasing washing step (S103), and is composed of a process of washing the surface of the aluminum material part that has been degreased through the degreasing washing step (S103) with purified water 2 to 4 times to remove the degreasing cleaning agent composition remaining on the surface of the aluminum material part.

[0050] The above neutralization step (S107) is a step of neutralizing an aluminum material part washed through the above washing step (S105) by immersing it in a neutralization solution, and it is preferable to immerse the aluminum material part washed through the above washing step (S105) in a neutralization solution at 25 to 35°C for 30 to 60 seconds.

[0051] At this time, the neutralizing solution is composed of 13 to 17 weight percent sulfuric acid, 4 to 6 weight percent chromic acid, and the remainder being purified water. The neutralizing solution composed of the above components not only neutralizes the aluminum material part washed through the washing step (S105), but also serves to remove smut remaining on the surface of the aluminum material part.

[0052] In the above neutralization step (S107), if the temperature of the neutralizing solution is less than 25℃ or the immersion time is less than 30 seconds, the above effect is negligible, and if the temperature of the neutralizing solution exceeds 35℃ or the immersion time exceeds 60 seconds, the above effect is not significantly improved and the efficiency of the manufacturing process is reduced, so it is undesirable.

[0054] The degreasing and cleaning method for aluminum materials according to the present invention configured as described above exhibits an excellent degreasing and cleaning effect on aluminum materials applied as covers for air conditioner filters for semiconductor processes, etc., while not causing surface discoloration, thereby maintaining the quality of the aluminum material. Furthermore, by using a jig with an efficiently improved racking cassette section, the throughput can be dramatically improved.

[0055] delete Explanation of the symbols

[0056] S101 ; Jig insertion stage S103 ; Degreasing step S105 ; Washing step S107 ; Neutralization stage

Claims

Claim 1 A jig insertion step of inserting an aluminum material part into a jig; a degreasing and cleaning step of immersing the jig containing the aluminum material part inserted through the jig insertion step into a degreasing and cleaning agent composition at 25 to 35°C for 15 to 25 minutes to degrease and clean, wherein an atmosphere condition is created in which air is introduced by a blower to generate a vortex in the degreasing and cleaning agent composition to increase flowability; and a cleaning step of washing the aluminum material part degreasing and cleaning through the degreasing and cleaning step. A method for degreasing and cleaning an aluminum material, comprising: a neutralization step in which an aluminum material part cleaned through the above washing step is immersed in a neutralization solution at 25 to 35°C for 30 to 60 seconds to neutralize it; wherein the degreasing and cleaning agent composition comprises 100 parts by weight of sodium carbonate, 8 to 12 parts by weight of sodium hydroxide, 70 to 80 parts by weight of sodium metasilicate, 140 to 160 parts by weight of sodium triphosphate, and 50 to 70 parts by weight of a surfactant, wherein the surfactant is formed by mixing 100 parts by weight of polyoxyethylene alkyl ether with 100 to 200 parts by weight of sodium alkylnaphthalene sulfonate, and wherein the neutralization solution comprises 13 to 17% by weight of sulfuric acid, 4 to 6% by weight of chromic acid, and the remainder being purified water. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete

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