TW554048B - Aluminum alloy sheet for recording medium case shutter - Google Patents

Abstract

This invention provides an aluminum alloy sheet for a recording medium case shutter which satisfies all the characteristics of lightness, rigidity, crack resistance, metal stamping property, bending workability, solvent resistance and UV cured ink printing characteristics required for an aluminum alloy sheet for a shutter of a recording medium case. The shutter comprises following materials: aluminum alloy substrate, in which the aluminum alloy contains 2.2-2.8 mass % of Mg, 0.35-0.55 mass % of Mn and 0.1-0.4 mass % of Fe; on a surface which is the shutter outer surface side of an aluminum alloy substrate, a chromate film of 5 to 50 mg/m<2> in terms of chromium coating weight is formed as a first layer, and a acrylate modified polyester urethane based resin coating film is formed as a second layer on the surface of the shutter outer surface side; the synthetic resin coating film contains an acrylate modified polyester urethane based resin, inorganic particles with an average particle size of 10 mum or less, and of 5 to 20 parts by weight based on 100 parts by weight of the acrylate modified polyester urethane based resin, and a polyethylene oxide based lubricant of 0.5 to 3 parts by weight based on 100 parts by weight of the acrylate modified polyester urethane based resin. The synthetic resin coating film is formed with a film thickness of 0.5 to 3 mum.

Description

554048 Α7 _ Β7 V. Description of the invention (y [Technical field to which the invention belongs] (Please read the precautions on the back before filling out this page) The present invention relates to magnetic disks such as floppy disks, magnetic disks M 0 and small magnetic disks A sliding door on a case of a recording medium such as an optical disc. In particular, it relates to the use of completely satisfying the lightweight, rigidity, flaw resistance, stamping workability, bending workability, solvent solubility resistance, and UV-curable ink printing characteristics. Sliding door of aluminum alloy plate. [Known technology] In magnetic disks such as floppy disks, M 0 magnetic disks and small magnetic disks, etc., the example of the floppy disk shown in Figure 1 is in a box made of synthetic resin. The body 2 contains a recording medium 3 such as a magnetic disk or an optical disc (recording magnetic disk) on which information is recorded. In addition, when writing or reading information, bring the magnetic head or the optical head close to the recording medium 3 in the case 2 The magnetic disk or the optical disc medium 3 reads and writes. Therefore, an opening (window) is provided in the case 2 as a window for disposing a magnetic head or an optical head near the recording medium 3, and in order to open and close the opening, it is also provided. Up the sliding door 1. The consumer cooperative of the Ministry of Economic Affairs and Intellectual Property of Japan printed the oblique view of Fig. 2 and the cross-sectional view of Fig. 3. The sliding door 1 is a c-shaped plate, and the box is held by the pair of faces. In the 2 state, sliding is guided by the guide groove provided in the box body 2 to open the window at a position where the window portion of the box body 2 and the window portion 4 of the sliding door 1 meet, and the window of the box body 2 is normally closed. In addition, the function required for the sliding door is to protect the magnetic surface when necessary. In addition, in order to guide the sliding movement on the box, the sliding door must be lightweight and rigid. Therefore, in recent years, it has been used as a sliding door. Materials used: The size of this paper applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) -4-554048 A7 B7 V. Description of the invention (2) Lightweight and rigid aluminum alloy plate. (Please read the back first (Please note this page before filling out this page.) When using aluminum alloy plates in sliding doors, if the alloy plate is exposed on the surface of the sliding door, the surface has low lubricity and low surface hardness, so the large abrasion is insufficient. For this reason, When manufacturing or using products, Defects are easy to occur. In addition, the adhesion of the ink used for printing on the surface of the aluminum alloy plate with the metal surface exposed is low. In order to solve the above problems, various slide doors have been proposed in which various surface curing coatings are provided on the surface of the aluminum alloy plate. In order to prevent the occurrence of blemishes, the present applicant also proposed a sliding door provided with a thermosetting resin coating film containing inorganic fine particles and a lubricant having a specific average particle diameter on the surface of an aluminum alloy plate (Japanese Patent Laid-Open Publication 1 1-1 4 4 4 2 5) In order to improve the adhesiveness of the ultraviolet curable ink, a sliding door provided with a polyester urethane resin film having an acrylate group as a functional group on the surface of an aluminum alloy plate has been proposed (Japanese Patent Laid-Open Publication 2000-30400) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. However, even if the applicant has these existing technologies, it certainly has the characteristics of lightness and rigidity required as aluminum alloy plates for sliding doors. All features including processability such as flaw resistance, press workability and bending workability, solvent resistance, and UV-curable ink printability We hope that all properties are further improved. [Means for solving the problem] The present invention for solving the above-mentioned problems is an aluminum alloy plate sliding door provided on a box housing a recording medium and capable of opening / closing a window portion for a recording head, and is composed of the following materials: Aluminum alloy substrate, the aluminum alloy contains M g ·· This standard is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -5- 554048 A7 B7 V. Description of the invention (3) 2.2 ~ 2 · 8 Mass%, Mn: 0.35 to 0.55 mass%, and 1 ^ 6: 0 to 1 to 0.4 mass%; at least made of the above-mentioned aluminum alloy (please read the precautions on the back before filling this page) substrate The surface of the sliding door on the outer side of the recording medium box, as the first layer of chromate film, converted to the amount of chromium adhesion, the chromate film is set to 5 ~ 5 Omg / m2; And a film made of acrylate-modified polyester urethane-based resin provided as the second layer on the outer side of the sliding door, and the film made of acrylate-modified polyester urethane-based resin has a film thickness of 0 5 to 3 μm, in a 100 weight ratio of the above-mentioned acrylate-modified polyester urethane-based resin, There are inorganic fine particles having a ratio of 5 to 20 weight ratio and an average particle diameter of 10 μm or less, and the content of the acrylic ester-modified polyester urethane-based resin 100 weight ratio is 0.5 to 3 weight ratio. Oxidized polyethylene based lubricant. As the above-mentioned inorganic fine particles, at least one selected from colloidal silica, talc and mica can be used. Moreover, it is preferable that the tensile strength of the said aluminum alloy plate is 300-350 M Pa. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and the Consumer Cooperatives [Embodiments of the Invention] The present invention will be described in detail below. The aluminum alloy plate used for the sliding door of the recording medium case of the present invention forms a chromate film on the surface as the first layer, and a synthetic resin film is formed on the chromate film as the second layer. The surface is composed of an aluminum alloy substrate and at least an outer side of a sliding door of a recording medium case of the aluminum alloy substrate. First, set the conversion cost as the first layer on the surface of the aluminum alloy substrate. The paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -6- 554048 A7 _ _ B7 V. Description of the invention (4) (please Read the precautions on the back before filling this page.) A chromate film with a chromium content of 5 to 5 Omg / m2 is used as the second layer and a synthetic resin film with the following composition is provided. The synthetic resin film has an acrylate-modified polyester urethane-based resin, and the average particle diameter of the acrylate-modified polyester urethane-based resin is 5 to 20 in a weight ratio of 100, and the average particle diameter is 10. // Inorganic fine particles below m and an oxidized polyethylene-based lubricant in a weight ratio of 0.5 to 3; In addition, by using a film thickness of 0.5 to 3 # m as the synthetic resin coating film, characteristics such as excellent press workability, bending workability, defect resistance, printability, and solvent resistance can be obtained. On the surface of the aluminum alloy plate, a chromate film of the first layer, which is converted to a chromium adhesion amount of 5 to 5 Omg / m2, is provided, which has an improved aluminum alloy plate and a synthetic resin film provided as the second layer. The effect of the interlayer adhesion is not easy to cause peeling caused by film rupture during bending, and at the same time, it is difficult to produce defects on the surface of the material. Next, each component of the synthetic resin film provided as the second layer will be described. Polyester urethane resin Polyester urethane resin printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The polyester urethane resin is formed due to the large proportion of aliphatic components in the polyester molecule and the two-dimensional ester bond. Linear high-molecular-weight resin, so it has high stretch characteristics. This effect suppresses cracking and peeling of the film at the bending-processed portion during bending. Moreover, the urethane bond is stronger than other resin bonds and the intermolecular interaction between the urethane bonds has high strength. With this effect, the hardness of the film is increased, and it is not easy to produce defects on the surface of the material. At the same time, the coated composite paper is not easy to dissolve during the solvent washing process. The standard of China National Standards (CNS) 8-4 (210X29? Mm) 554048 is applicable. A7 B7 V. Description of the invention (5 ^ into a resin film. (Please read the precautions on the back before filling out this page) In addition, the acrylic urine denaturation of the polyester urine-based resin with such high stretch properties and strength is performed. 'Improve the adhesiveness between the material surface and the UV-curable ink' to improve printability. The mechanism of printability improvement will be described below. It is used to print the name and type of the recording medium on the surface of the sliding door. The UV-curable ink used consists of oligomers with acrylate groups such as urethane acrylates and epoxy acrylates, photopolymerization initiators, and pigments. The light energy produced by irradiating ultraviolet rays (h ^) Is required. As shown below, if light energy (h ^) is applied to the UV-curable ink, the photopolymerization initiator acts as a catalyst. The propionate group of the oligomer having a propionate group generates a radical, and these radicals are bonded to each other to be cured. In the present invention, a synthetic resin coating of an acrylate-modified polyester urethane resin is used, Even if light energy such as ultraviolet rays is applied to the film, the acrylic esters are not bonded to each other. When the ultraviolet curable ink is laminated on the film and irradiated with ultraviolet rays, the economic promotion department uses a photopolymerization initiator in the ultraviolet curable ink. The role of the printing agent of the Intellectual Property Bureau's consumer cooperatives, the acrylate groups in the UV-curable ink and the acrylate groups in the film together become free radicals, forming the acrylate groups and the film in the free-radical UV-curable ink. The acrylate groups in the resin are firmly bonded. Therefore, the UV-curable ink has good adhesion and improved printability. Inorganic fine particles The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -8-554048 A7 B7 V. Description of the invention (6) (Please read the notes on the back before filling this page) As the inorganic particles, you can use colloidal oxygen Silicone, talc, mica, etc. are more than one kind of these materials, and these materials have a relatively high hardness. By including these materials in a synthetic resin coating, the surface hardness of the material is further increased and defects are less likely to occur. Adding a lubricant to the synthetic resin coating improves the lubricity of the surface of the material. The improvement of the lubricity of the surface of the material has the effect of preventing defects on the surface of the material and reducing the load on the cutting edge of the cutting tool during stamping. Therefore, It has the effect of suppressing the wear of the cutting tool tip and the occurrence of burrs on the sliding door end face due to the sag of the cutting tip after continuous forming. The lubricant is oxidized polyethylene, microcrystalline, polytetrafluoro Synthetic compound lubricants such as vinyl and fluorine, and oil-based lubricants such as lanolin and carnauba wax. From the standpoint that defects do not easily occur on the surface of the material, the use of a linear structure results in excellent lubricity. Oxidized polyethylene based lubricant with high strength. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs The reasons for limiting the number of chromate films provided as the first layer and synthetic resin films provided as the second layer will be described below. Chrome adhesion halo of chromate film: 5 ~ 50ma &gt; / m2 By providing a chromate film as the first layer on the surface of the aluminum alloy substrate, the aluminum alloy plate and the synthetic resin coating provided as the second layer are improved. The interlayer adhesion of the film is not prone to peeling caused by film rupture during bending processing. The paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) -9-554048 A7 B7 V. Description of the invention (7) (Please read the precautions on the back before filling in this page} At the same time, it has the effect of not easily causing defects on the surface of the material, but when the amount of chromium is less than 5mg / m 2, the effect is almost invisible. On the other hand, in chromium When the adhesion amount is more than 50 mg / m2, there is a problem that the chromate film itself is cracked during the bending process, and the synthetic resin film is also cracked with this as a starting point, and the peeling occurs at the location where the crack occurs. The chromium adhesion amount of the chromate coating is in the range of 5 to 50 mg / m 2. The average particle diameter of the inorganic fine particles: 10 am or less. Although the addition of inorganic fine particles to the synthetic resin coating has an increased surface hardness, it is not easy. produce When the average particle diameter is greater than 10, the inorganic particles are not completely fixed in the synthetic resin coating, and the inorganic particles are liable to fall off during the bending process during the bending process. When the inorganic particles fall off, they are in the mold. Accumulation causes defects on the surface of the material during processing. In addition, inorganic particles adhere to the magnetic surface and impede reading and writing performance. Therefore, the average particle size of the inorganic particles is less than 1 // m. The employee cooperation of the Bureau Du printed the content of inorganic fine particles in 100 weight ratio of acrylate modified polyester resin: 5 ~ 20 weight ratio Although adding inorganic fine particles to the synthetic resin film, it is not easy to improve the surface hardness of the material A flaw effect is produced, but the effect cannot be fully exhibited when the content of the inorganic fine particles in the weight ratio of acrylate-modified polyester urethane-based resin 100 is less than 5 weight ratio. On the other hand, when it is more than 20 weight ratio , Excessive inorganic particles are not completely fixed in the synthetic resin coating, and the paper size applies the Chinese National Standard (CNS) A4 210X297 mm) -10- 554048 A7 B7 V. Description of the Invention (〇) (Please read the precautions on the back before filling this page) Causes the problem of inorganic particles falling off during the bending process during bending. Therefore, acrylic acid In the 1000 weight ratio of the ester-denatured polyester urethane-based resin, the content of the inorganic fine particles is set to 5 to 20 weight ratio. The acrylic resin is a polyester-based resin; [0 〇 weight ratio φ gasified polyethylene resin i Lubricant content: 0 · 5 ~ 3 Lightning ratio Although adding an oxidized polyethylene-based lubricant to the synthetic resin film, it can improve the lubricity of the surface of the material, and it is not easy to produce defects on the surface of the material. The sliding door end surface produces a burr effect, but when its content is less than 0.5 weight ratio, the effect cannot be fully exerted. On the other hand, when the content of the oxidized polyethylene-based lubricant is more than 3 weight ratio, the excess oxidized polyethylene-based lubricant forms segregation on the surface of the synthetic resin coating, which prevents the acrylate groups and acrylates from being denatured in the UV-curable ink. The combination of the acrylate groups in the polyester urethane-based resin causes a problem that the adhesiveness of the ultraviolet curable ink decreases. Therefore, the content of the oxidized polyethylene-based lubricant in the 100 weight ratio of the acrylate-modified polyester urethane-based resin is 0.5 to 3 weight ratio. The thickness of the synthetic resin film printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs: 0.5 to 3 // m. By providing the above synthetic resin film on the aluminum alloy plate, although it is possible to obtain defects on the surface of the material, Effect, however, when the film thickness of the synthetic resin film is less than 0.5, this effect is difficult to exhibit. On the other hand, when the film thickness of the synthetic resin film is greater than 3 // m, the internal stress of the formed film is too high, and the adhesion of the film is reduced. In addition, if the paper size of the film is in accordance with the Chinese National Standard (CNS) A4 (210X 297 mm) -11-554048 A7 B7 V. Description of the invention (g) The adhesiveness will be reduced, which will cause the coating of the bent part to be covered. The film is prone to peeling. Therefore, the film thickness of the synthetic resin film is set to 0.5 to 3 // m. Pencil hardness of the surface forming the outer side of the sliding door of the recording medium case: 5 Η or more In addition, from the viewpoint of preventing defects easily, The pencil hardness is set to 5 Η or more. Tensile strength of the aluminum alloy plate: 300 ~ 350 MPa. In addition, according to the overall tensile strength of the aluminum alloy plate formed above, the range of 30,000 ~ 350 MPa is relatively smaller. good. If the tensile strength is less than 300 MPa, the rigidity of the sliding door becomes insufficient, so that it may be during the forming process of the sliding door, or during the steps of assembling the recording medium box and using the recording medium box. The sliding door deforms. On the other hand, when the tensile strength is more than 3 5 OMP a, the strength of the tool is too high, and the punch tip of the processing tool (cutting blade) tends to be aggravated when the sliding door is pressed. Therefore, the tensile strength of the aluminum alloy plate is preferably in the range of 300 to 350,000 MPa. In addition, although a combination of various components can be used for the aluminum alloy substrate itself, the effect of the present invention is further improved by using an aluminum alloy substrate having the following composition. Next, the reasons for limiting the addition and composition of the aluminum alloy substrate will be described. This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) (Please read the notes on the back before filling this page) Order f Printed by the Intellectual Property of the Ministry of Economic Affairs and the Consumer Cooperatives -12- 554048 Α7 Β7

V. Description of the invention (Mg content of A coated aluminum alloy substrate: 2 · 2 ~ 2 · 8% by mass (please read the precautions on the back before filling this page) because Mg can promote work hardening when cold-rolling aluminum alloy substrates And has the effect of improving the strength of the material, so it is an essential component in the present invention. However, if the content of Mg is less than 2.2% by mass, the effect of sufficiently increasing the strength cannot be obtained, resulting in insufficient rigidity of the sliding door, For example, when the recording medium box is dropped, it is easy to cause the loss of the sliding door after the sliding door is deformed. On the other hand, if too much Mg is added, the strength becomes too high, resulting in an increase in the stamping process when the sliding door is formed. The tool tip of the processing tool (cutting knife) is worn, and the tip of the tool tip is worn out after continuous forming (increased R), which causes the problem of burrs on the end face of the sliding door that is stamped. Therefore, the amount of M g added The range of 2 · 2 ~ 2 · 8% by mass is suitable. Mn content of the aluminum alloy substrate: 0.35 ~ 0.55% by mass. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs because of the addition of η A 1-F e-Mn-based crystals that can improve the cutting properties at the time of press processing can be produced and have the effect of increasing the material strength of the aluminum alloy substrate. Therefore, in the present invention, Mn is a necessary component. Generates A 1-F e — Μη series crystals, which can improve the cutting properties of tin alloy plates, reduce the burden on the cutting tool tip during punching, can suppress the wear of the cutting tool tip, and suppress continuous forming. The sag of the rake tip causes burrs on the end face of the sliding door that is punched. In order to show the effect of improving the cutting property, it is necessary to add at least M η 0.35 mass% or more. However, if more M η is added At 0.55% by mass, huge crystals will be formed and the number of crystals formed will increase, so that the formability will be reduced. The size of this paper is applicable to China National Standard (CNS) 8-4 specifications (210 × 29? Mm) -13- 554048 A7 B7 V. Description of the invention (j (please read the precautions on the back before filling out this page), and when the sliding door is bent into a C shape, cracks will sometimes occur in the bent part. Therefore, Μ η The addition amount is preferably in the range of 0.35 to 0.55% by mass. Fe content of the aluminum alloy substrate: 0. 1 to 0. 4% by mass. The addition of Fe has the following significant effects: formation can improve stamping A 1 — F e — Mri-based crystals that are cut-off during processing; and the crystallizable crystal grains of the Tishang alloy substrate are refined. The larger the amount of Fe added, the finer the crystal grains. However, If the amount of Fe added is less than 0.1% by mass, this effect cannot be achieved. In addition, if it is added in excess of 0.4% by mass, the formation of giant crystals and the number of crystals may increase, which may result in Formability is reduced. Therefore, the amount of Fe added is preferably in a range of 0.1 to 0.4% by mass. Next, a method for manufacturing the aluminum alloy plate having the above-mentioned configuration will be described. First, for example, it will have the above composition (including Mg: 2 · 2 ~ printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Employee Consumer Cooperatives, 2. 8% by mass, Mn: 0.35 ~ 0.55% by mass, and Fe: 0.001 ~ An aluminum alloy (0.4 mass%, the remainder of which is composed of aluminum and unavoidable impurities) is dissolved, and continuously cast into ingots. Then, a homogenization process is performed at a temperature of, for example, 500 ° C for 4 hours. Next, the ingot subjected to the homogenization treatment is hot-rolled or hot-rolled and cold-rolled to be rolled to a specific thickness. Then, the rolled sheet is subjected to intermediate annealing at a temperature of 350 ° C or higher, and then cold-rolled to achieve a final rolling ratio of 20 to 90%. Then, according to the needs, stabilization, deformation correction, and other post-production paper sizes are applicable to the Chinese National Standard (CNS) A4 (210X297 mm) -14- 554048 A7 B7 V. Description of the invention (^ Project. Then, by alkali Degreasing and acid treatment are used as pre-coating treatments to remove the oil and oxide film on the surface of the aluminum alloy plate. (Please read the precautions on the back before filling this page) Apply the obtained aluminum alloy plate as a patent for this invention A chromate film is provided as the first layer on the surface of the IS alloy substrate described in the above range on the surface of the IS alloy substrate in an amount equivalent to 5 to 5 Omg / m 2. Then, a layer containing chromate is provided. : Acrylate-modified polyester urethane-based resin; and inorganic fine particles having an average particle diameter of 1 0 // m or less (weight ratio is 5 to 2 0 in weight ratio of acrylate-modified polyester urethane-based resin 1 0 0) ; And an oxide polyethylene-based lubricant (weight ratio of acrylic ester-modified polyester urethane-based resin 100 weight ratio of 0.5 · 5 to 3) coatings such as roller coating method on the surface of aluminum alloy plates As the second layer, make the film thickness after drying 0 · 5 ~ 3 // m, and then, for example, 5 to 30 seconds of heating and drying below 250 ° C to form a synthetic resin film on the chromate film. Example 1 Next, the present invention will be described. The characteristics of Example 1 are compared with the comparative examples outside the scope of the present invention and explained. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs in a general manner, respectively: from Mg: 2.75 mass%, Mn: 〇 4% by mass, Fe: 0.19% by mass, Si: 〇 · 1 1% by mass, Cu: 0 · 02% by mass, Cr ·· 04% by mass, Ti: 0 · 02% by mass, and the rest is A 1 aluminum alloy (Alloy 1); and Mg: 4 · 85% by mass, "! 1 ····· 45% by mass, Fe ····· 23% by mass, and Si: 〇 · 16% by mass , Cu ·· 0 · 09 mass%, Cr: This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) -15- 554048 A7 B7 --------------- --—— V. Description of the invention (0 · 03 quality®%, Ti · 〇.02% by mass, and the rest of the aluminum alloy (alloy 2) composed of A1 is dissolved, and an ingot is made by continuous casting. Next, 'the ingot was subjected to a homogenization treatment at a temperature of 5 10 ° C for 4 hours, and then hot-rolled to produce a sheet having a thickness of 2.8 mm. Next, the thickness of the sheet was rolled by cold rolling. After 1 mm, intermediate annealing was performed at a temperature of 4 2 0 t. Finally, the final cold rolling was performed until the thickness of the plate reached 0 · 18 mm 〇 The plate was subjected to alkaline degreasing, and as shown in Tables 1 to 4 The first layer is set, and then the second layer is coated by a coating method with the components shown in Tables 1 to 4 to form a specified film thickness after drying, and then used at a temperature of 200 ° C. A test material coated with a synthetic resin film was obtained by the following heating and drying. In addition, in Examples 1 to 13 shown in Tables 1 and 2 below, Alloy 1 was used, and Reference Example 1 to 4 was Alloy 2. In addition, for comparison, a reference material with an anodized film instead of a resin film is also produced. (Please read the precautions on the back before filling out this page} Clothing, a ua Φ, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, moderate size paper, quasi-standard home

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I ε round Wei inch "iis * si 9ίίϊ« zr—s 8fl 6 is This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -17- 554048 A7 B7 Instructions 5) ^ — Ministry of Economic Affairs Intellectual Property Bureau employee consumer cooperative prints the second layer film thickness_ t— τ— LD d 00 τ— 〇V &quot; Τ— τ— τ ~ _ 1 _ Μ l〇d ο CO ΙΟ τ— 1〇ΛΓ- LO χ — 1 LO τ— ΙΩ Τ— ΙΟ τ— LO \ — te m \ 1m11 ρ NJ Secret K] Secret NJ Secret NJ Secret NJ Secret 壊 \] Secret N3 Secret NJ N] Secret MM mm 壊 _ ΜＭ〇〇〇〇 〇〇1 〇〇〇〇igi ^ f _ | Η-- τ— τ— τ— X— 1 Τ— τ- τ— τ— Jun; t1mll P 壊 Schroeder M aj «^ ο τ ~ 〇Τ— 〇 ^ — 〇Τ— 〇X— 1 〇τ— · Ο τ— Ο τ— Ο Τ— tltlrrrll P Ssg 1ι If mn. Ϋ ϋπι • iH Κ St Μ ϋ If li 11 I and li ι de sun age ϋπι 11 if装 厅 [晒 照 龄 AM il If mi 壊 aging AM * iH Κ 11 If ii self-tanning age Dm 11 if li eat with iH S 11 p Έ m Luoca1 || 〇1 1 T— o τ— m § 氍 漶 m 鲴 turn漶 m Sword 骝 氍 骝 氍 peng sword mm 漶 _ m mm 氍 氍 氍 mildew 壊 m 氍 氍 Μ 剡 mm 漶 mm 漶 m 氍 漶 _ m sword 〇i 遛 u 1 Series IK CNI ί Wei00 1 IK inch i Sample Bu Meng ± Λ CO Ϊλ σ &gt; ψ Shock ο Spirit 1 镒 ^ 衣-(Please read the precautions on the back before filling this page), 11

P This paper size applies the Chinese National Standard (CNS) A4 specification (210 &gt; &lt; 297 mm) -18- 554048 A7 B7 V. Description of the invention (d) Film thickness printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs _ V- τ — Τ— χ— T— τ— Weight ratio L〇τ— 1〇Τ— LO τ—10〇— in τ— to τ— u〇V- 1 V- 〇 · HITT? Polyethylene fired system Polyethylene fired system Polyethylene fired system Polyethylene fired system Polyethylene fired system Polyethylene fired system Polyethylene fired system Polyethylene fired system Deer hO Secret Army halo ratio 0.001 〇Τ— 〇 The average particle size of the second layer of inorganic particles (μηη) Τ—Τ- 1 τ— τ— Step i1mi1 P Talc talc talc talc talc talc talc weight ratio 〇〇Τ— 〇〇 V- 〇〇Τ— 〇〇〇X— synthetic resin Omil W acrylic Resin Acrylic Epoxy Resin Polymer Ethylene Resin Age '' m 11 If installed i Bite gallery Sp 11 if ii 11 Ιι mi Sg 11 p Sp II if age Dm m 1 ¾ if attached (mg / m2) (converted to Cr ) is m i1m11 coated chromate Coated chromate 1__ coated chromate coated chromate coated chromate coated chromate coated chromate coated chromate 1 coated chromate CNJ Τ— 00 inch Τ— IT) τ— C0 T- BU T— 00 T— cn 'r- 镒 镒 dj 镒 镒 镒 AJ 1 (Please read the precautions on the back before filling this page) ·, » · The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210X 297 mm) -19- 554048 A7 B7 The thickness of the second layer printed by the employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs | _ τ — τ — τ — x— χ- Ο Ο 00 Lubrication material dmil ^ · Α Ρπ o V- to τ— in Τ— in ^ — LO v ~ LO τ— anodized coating tlrnll P oxidized polyethylene microcrystalline system ※ Note 1 Huili Lanolin ※ Note 2 Oxidized polyethylene storage system oxidized polyethylene fine system inorganic particles M AJ tlmll 'JA ah 〇T— 〇ο 〇〇〇 average particle size (μηι) V &quot; ^ — τ— τ ~ Τ— Sao IS dmil P n? 憋 synthetic resin_ _u &lt; 1ίπ ||--^-A. Pt | 〇 Τ— 〇T— ο X— Ο τ— Ο τ— 〇Τ— Omil P幻 幻 tn 11 If iam • iH s 11 If li Ml DDm • iH E II If linked to the fun age Dtn il I | 」″ ΠΠ 11 p | gr ®I DDin 11 If ii 1½ _cC _ w1 -1 Jun \ 1mtl W coated chromate coated chromate coated chromate coated chromate coated chromate coated chromate 壊 Comparative Example 21 Comparative Example 22 Comparison Example 23 Comparative Example 24 Comparative Example 25 _1 Comparative Example 26 Comparative Example 27 u! Louel: (xlte 9U 彐 2SAJoOJoiuI: rH * a (Please read the precautions on the back before filling in this page)

、 1T Ρ. This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297mm) -20- 554048 A7 B7 V. Description of invention (printed by LO of Intellectual Property Bureau, Ministry of Heart and Economy, Consumer Cooperative, printability 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 Solvent resistance (mg / dm2) 〇〇o ο ο 〇ο 〇〇 Bending workability ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ a Change amount (μηη) After 200,000 impacts 〇oo 〇 ο L〇 七 σ) 七 0 0) cd inch · I 00 τ— CO T— cd τ— cd Τ— CO τ— cd τ— CO χ— 00 τ ~ C0 Cutter tip shape R (μηΐ) After 200,000 impacts, CO 1〇CO in 00 in CO in ΙΟ LO in BU LO inch in T— ΙΟ inch in 1 〇q seven o ο q Ο Seven o 〇 inch 〇 Defect resistance ◎ ◎ ◎ ◎ 〇 〇〇 ◎ Lubricity (coefficient of friction) ddd ο ddddd 11 Worker CD Worker CD Worker CD Worker CD Worker CD Worker L0 Worker LO Worker UO Working Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 | Example 9 (Please read the back first Note to fill out this page)

、 1T This paper size applies the Chinese National Standard (CNS) A4 specification (210 &gt; &lt; 297 mm) -21-554048 A7 B7 V. Description of the invention (j Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs ○ § 〇 〇§〇〇§〇〇i〇Ο ο § 〇〇τ— 0/100 100/10 0 ο § 〇ο τ— ο δ 〇〇10 / 100 Solvent solubility (mg / dm2) 〇〇〇〇〇〇 〇 ο ο ο Bending workability ◎ ◎ ◎ ◎ ◎ X &lt; &lt; ◎ Stamping workability change amount (μΓΠ) LO after 200,000 impacts LO 7000 CO CO σ &gt; 00 ΙΓ &gt; ιό 11.2 CD ο ο Initial CO CO Τ— CO χ— 00 X— 00 00 τ— CO X— C0 Cutter tip shape R (μηΐ) After 200,000 impacts, LO LO CN 1〇 inch LO CNI ΙΟ inch ΙΟ ο 00 IT) in inch ΙΟ C0 ΙΟ C0 LO initial stage 〇〇ο seven 〇 ο ο o inch · ο ο ο defect resistance 〇 ◎ ○ ◎ ◎ X 〇ο ◎ ◎ lubricity (coefficient of friction) 0.09 0.05 1 i 0.07 0.07 0.07 I 0.50 I 0.07 0.07 0.07 0.07 I 11 5 ω 5 Industrial CM Example 10 Example 11 Example 12 Example 13 Reference 14 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Comparative Example 11 丨 (Please read the precautions on the reverse side before filling in this page) Clothing and bound paper size Applies to Chinese National Standard (CNS) A4 specification (210X297 mm) -22- 554048 A7 B7 V. Description of the invention (d) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 50/100 10/100 80/100 100/100 100/100 100/100 100/100 100/100 100 / 100 Solvent resistance (mg / dm2) CNI inch 〇〇〇〇〇〇〇〇, bending ft workability 〇 ◎ ◎ &lt; ◎ &lt; ◎ ◎ stamping workability ffllH ^ m ^ 200,000 impacts after qq seven 〇00 00 CNI 七 〇) 〇〇 · Ο) 七 〇〇σί oi 1 Τ—00 V &quot; 00 T—CO T— 00 00 T— 00 T— 00 ΤΓ- 00 CO Cutter tip shape R (μηι) | After 200,000 impacts, CO uo 00 1〇CO in 1〇1〇IT) CN 1〇CD in UO CN 1 〇q 〇〇〇inch · 〇ο — q 〇 Defect resistance &lt; &lt; &lt; ◎ &lt; ◎ &lt; &lt; Lubricity (Coefficient of Friction) ί d 〇 dddddd ΛΟ τ- Ο CO ν- Ο 11 working positions working positions CD working positions General worker 12 Comparative example 13 Comparative example 14 Comparative example 15 Comparative example 16 Comparative example 17 Comparative example 18 Comparative example 19 Comparative example 20 (Please read the precautions on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 specification (210 × 297 mm) -23- 554048 A7 B7 V. Description of invention (j Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs

Printability 50/100 90/100 20/100 50/100 100/100 100/100 100/100 蘅 #i E ingot E 〇ο ο ο ο 〇ο Bendability ◎ ◎ ◎ ◎ ◎ &lt; &lt; Stamping Change of property (μηι) After 200,000 impacts ⑦ 00 CNJ Seven m Seven CNJ &quot; sT CN LO 1 00 T— cd τ— cd τ— 00 τ ~ 00 ν— 00 ^ — 00 Cutter tip shape R (μηι ) After 200,000 impacts, 10 inch l〇ΙΌ ΙΟ C0 ιό LO ΙΟ UO 00 ιη 1 ο ο 〇 inch · ο ο ο ο flaw resistance 1_ ◎ &lt; &lt; &lt; 3 &lt; Ο Ο i lubrication (friction Coefficient) g 〇 · Ο) ο ο Ο CNJ ο ο ο ο 雠 hardness tester CD tester to tester LO tester 10 tester UO tester Comparative example 21 Comparative example 22 Comparative example 23 Comparative example 24 Comparative example 25 Comparative example 26 I Comparative Example 27 I (Please read the precautions on the back before filling in this page) Clothing · Ordering f This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -24- 554048 A7 B7 V. Description of the invention (for The pencil hardness of the surface of the material is measured by the pencil scratch hardness test of JISK 5400. (Please read the Please fill in this page again for the matters needing attention) The surface of the material is lubricated by using a sliding tester with a spring wire (Bowden Cable). A steel ball with a diameter of 4.23 mm is brought into contact with the surface of the test material. Change the position, and slide back and forth three times at a speed of 4 mm / sec. The friction coefficient is calculated by the average sliding weight at this time. In addition, for the resistance to the surface of the material, a sliding test machine with spring steel wire is used to make the diameter A steel ball of 4 · 2 3 mm contacts the surface of the test material 'by repeatedly sliding the same position at a speed of 4 mm / sec by increasing the weight of 200 g, and measuring the number of times of occurrence of flaws on the surface of the test material. 20 times, the flaw resistance is very good, the evaluation is ◎, the number of sliding times exceeds 10 times, the flaw resistance is good, the evaluation is 0, the number of sliding times is 2 to 10, the evaluation is △, and the number of sliding times is 1 or less. X. Printed on stamping processability by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. A continuous cutting process test was performed under the conditions shown in Figure 4 to determine the change and change in the shape of the cutter tip (r). In cutting the continuous test, a low viscosity volatile oil pressure as the pressure oil AF - 2A (manufactured by Idemitsu Kosan (K.K.)), the oil coating quantity of 1 g / m2. In addition, S K D 1 1 (J I S) was used as the material of the cutting tool (knife), and the gap between the knives was set to 20 # m. Further, as a processing speed of 300 cm / min, the stroke length is 3 mm, and the cutting length is 30 mm. The shape of the cutter tip (R) was measured using a shape measuring device C S E D 3 6 D: manufactured by Kosaka Laboratories Co., Ltd .; stylus R = 2 // m). In addition, the amount of change is measured from the paper size of the cut section in Figure 4. The Chinese National Standard (CNS) A4 specification (210X297 mm) is applied. -25- 554048 Α7 Β7 5. Description of the invention (4 The convex part shown in the schematic diagram of the cross section Dimensions up to the tip of the burr. In addition, the number of continuous cutting operations was 200,000 impacts, and the shape and change of the cutter tip (R) at the initial stage and after 200,000 impacts were measured. The bending workability was tested by experiments. The thickness of the material is 90% of the bending radius. — 〇R bending test, the bending part is observed using a solid microscope at 50 to 200 times, and the fracture state of the bending part is evaluated. As an evaluation, no cracking occurred on the film. And the evaluation of the film and the inorganic fine particles not peeling was ◎, although the film was slightly cracked, the evaluation of the film and the inorganic fine particles not peeling was 0, the evaluation of some film and inorganic fine particles being peeled off was △, and the film and the inorganic fine particles were not peeled. The degree of peeling was severely evaluated as X. For solvent resistance, the test material was immersed in boiling 1,1,1-trichloroethylene, and measured for 6 minutes after immersion while applying ultrasonic waves. For the printability, the surface of the test material was subjected to ultraviolet printing under the conditions shown in Table 9 below. After being left at room temperature for 24 hours, it was subjected to a grid tape peeling test (JIS Η 4). 0 0 1) to judge the UV printing surface (please read the precautions on the back before filling out this page) The paper size printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs applies the Chinese National Standard (CNS) Α4 specification (210 &gt; &lt; 29 &gt; 7 mm) -26-554048 A7 ____ B7 V. Description of the invention (Table 9 UV-curable inks Urinary acrylic acrylate UV inks (manufactured by Seicoradobans)) Sieve No. 350 uv irradiation conditions UV irradiation intensity 120W / cm UV irradiation time 3 seconds (please read the precautions on the back before filling this page) From Tables 5 to 8, it can be seen that since Examples 1 to 13 are within the scope of the present invention, the pencil hardness is within 5 Η or more, it has good characteristics in terms of flaw resistance. In addition, as for press workability, it is almost impossible to see the increase in the shape of the cutter tip (R) and the amount of change, and it has good characteristics. It also has excellent properties in terms of workability, solvent solubility, and printability. Comparative Example 7 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs is a non-treated material without the first layer and the second layer. Insufficient pressability and printability. In addition, it is considered that there is an increase in burrs in continuous cutting processing. Comparative Example 8 did not provide a chromate film as a first layer, so a synthetic resin film The adhesiveness of the film was insufficient, and peeling of the film was observed at the bending portion. Comparative Example 9 The adhesion amount of chromium of the chromate film was 1 mg / m 2, which was insufficient, so the adhesion of the synthetic resin film was insufficient. Insufficient properties were observed, and peeling of the film was observed at the bending portion. Comparative Example 10 The chromium adhesion amount of the chromate coating was 100 mg / m2, which was too much. Therefore, during bending processing, the Chinese National Standard (CNS) A4 size (210X 297 mm) was applied to the chromic paper size. -27- 554048 A7 B7 V. Description of the invention (4 (Please read the precautions on the back before filling in this page) The salt film itself has cracks. Starting from this, cracks also occur on the synthetic resin film, and the Peeling can be seen at the cracked part. Comparative Example 1 Since the polyester urethane resin is not denatured with acrylate, the printability is not sufficient. Comparative Example 1 2 uses acrylic resin as the synthetic tree, so it has excellent defect resistance, Insufficient solvent resistance and printability. Comparative Examples 1 and 3 used acrylic epoxy resins as synthetic resins, so they had insufficient defect resistance, solvent resistance and printability. Comparative Examples 1 4 used polymer vinyl resins as Synthetic resin has insufficient defect resistance and printability. It is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Comparative Example 15 Since the synthetic resin film does not contain inorganic fine particles, Insufficient flaw resistance. Comparative Example 16 The average particle diameter of the inorganic fine particles was 20 // m. The inorganic fine particles were insufficiently fixed in the synthetic resin coating, and the inorganic fine particles were liable to fall off during the bending process during bending. Comparative Example 1 7 The content of the inorganic fine particles is too small, so the defect resistance is insufficient. Comparative Example 1 8 The content of the inorganic fine particles is too large, so that the excess inorganic fine particles are insufficiently fixed in the synthetic resin coating, and there is an inorganic substance in the bending part during the bending process The problem of particles falling off. Comparative Examples 19 and 9 did not contain an oxidized polyethylene-based lubricant in the synthetic resin film, and therefore had insufficient defect resistance and reduced press workability. In the continuous cutting process, an increase in burrs was seen. Comparative Example 2 0 Since the content of the oxidized polyethylene-based lubricant in the synthetic resin film is small, the defect resistance is insufficient, and the press processability is reduced, and an increase in burrs is seen in the continuous cutting process. Comparative Example 2 1 Since the content of the oxidized polyethylene-based lubricant in the synthetic resin coating was too large, the printability was insufficient. Comparative Examples 2 2 '2 3 and 2 4 Lubricants other than olefinic lubricants are used as lubricants in synthetic resin coatings, so the defect resistance is insufficient. The paper size applies Chinese National Standard (CNS) A4 specifications (21〇 × 297 mm) -28- 554048 A7 B7 ____ 5. Description of the invention (4 (please read the precautions on the reverse side and fill in this page). In addition, the printability is also insufficient. Comparative Example 2 5 Due to the thin film thickness of the synthetic resin film, the defect resistance is insufficient. Comparative Example 2 6 Because the film thickness of the synthetic resin film is too large, the internal stress of the formed film becomes too high. The adhesiveness of the film is reduced, and the film is easily peeled off during bending. Comparative Example 2 7 Since the film is cracked and the peeled part is harmful to the magnetic surface in the bending portion. Example 2 The characteristics of Example 2 of the present invention will be described in comparison with comparative examples outside the scope of the present invention. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Industrial and Consumer Cooperatives. Aluminum alloys having the composition shown in Table 10 below are dissolved by conventional methods, and ingots are made by continuous casting. Next, the ingot was homogenized for 4 hours at a temperature of 5 10 ° C, and then hot-rolled to produce a plate having a thickness of 2.8 mm. Next, after cold rolling to a sheet thickness of 1 mm, intermediate annealing was performed at a temperature of 4 ° C. Then, it is finally cold-rolled to a plate thickness of 0.18 mm, and if necessary, it is annealed after the final cold-rolling to perform a stabilization treatment. In addition, the compositions of Examples 1 to 4 are within the range specified by the present invention, and the compositions of Comparative Examples 1 to 6 are outside the range of the present invention. Comparative Examples 7 and 8 have the same composition as that of Example 1. The following Table 11 shows the chromate film and resin formed on the surface of the obtained aluminum alloy plate. The plate obtained as described above was subjected to alkaline degreasing. After that, Examples 1 to 4 and Comparative Examples 1 to 6 were treated with chromate phosphate to form a chromate film as the first layer. 2 0 mg / m 2, and then apply the coated paper with the composition shown in Table 2 below by the roller coating method to the size of China National Standard (CNS) A4 (210, X297 mm) -29- 554048 A7 ——______ B7. Explanation of the invention (& (Please read the precautions on the back before filling this page) as the second layer, so that the film thickness after drying is 1 # m, at a temperature of 2 0 ° C Heat drying was performed to obtain a test material coated with a synthetic resin film. In Comparative Examples 7 and 8, the adhesion of the chromate film of the first layer was different from that of the other examples and comparative examples. The method for forming the second layer was the same, and the conditions for forming the second layer were the same as those for the other layers. In addition, the coating conditions were the same for other examples and comparative examples. Table 1 0 Chemical / 1 Lease (mass%) Stabilization treatment Fe Μη Μα Example 1 0.1 9 0.47 2.75 vfirii Μ Example 2 0.19 0.45 2.30 &gt; frni None Example 3 0.19 0.37 2.75 M Example 4 0.35 0.47 2.75 4nL M Comparative Example 1 0.19 0.47 2.75 300 ° C Comparative Example 2 0.23 0.45 4.85 240 ° C Comparative Example 3 0.22 0.08 2.25 yfiTT M Comparative Example 4 0.61 0.01 or less 0.01 or less yfnr M Comparative Example 5 0.1 9 0.80 2.75 / fnT- Comparative Example 6 0.65 0.47 2.75 &gt; fnT- Comparative Example 7 0.19 0.47 2.75 / finer. Comparative Example 8 0.19 0.47 2.75 &gt; fnT- Printed by the Employees ’Cooperative of Intellectual Property Bureau, Ministry of Economic Affairs The paper scale is applicable to the Chinese National Standard (CNS) a4 specification (210X 297 mm) -30- 554048 A7 B7 V. Description of the invention ) τ— T— T— Lubricant weight 1 ratio LO X — in τ — m T — in Umlj Weight ratio of oxidized poly 1 ethylene oxide storage polyethylene oxide polyethylene oxide inorganic polyethylene particles Particle size (μηη) T— T— T— T— \ 1ttt11 talc I_ talc talc synthetic resin_ 100 I 100 100 100 Umii age application # 1 1 i 1 i 遁 1 i age AjtH ^ tl 1 Τττ-τ II I With 1 i age Dm u Μ I ^ | f ^ h ιι gallery ami 1 Ilai I 1¾ | ^ First layer adhesion (mg / m2) (converted to Cr) τ— o V- step limit P Phosphoric acid chromate 1_ Phosphoric acid chromic acid Salt Coated Chromate Coated Chromate Examples 1 to 4 Comparative Examples 1 to 6 Comparative Example 7 Comparative Example 8-(Please read the precautions on the back before filling this page) The size of the paper is applicable in China National Standard (CNS) A4 specification (210X 297 mm) -31-554048 A7 B7 V. Description of the invention (^ In order to evaluate the overall tensile strength, stamping workability and bending workability, the following tests were performed on the obtained test materials. . The measurement results and evaluations are shown in Table 12 below. (Please read the precautions on the back before filling out this page) The paper size printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs applies to Chinese National Standard (CNS) A4 (210X29? Mm) -32- 554048 A7 B7 V. Invention Explanation (^ SI) Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, bending workability of 90.-OR bending 0, 000, 000, 00 &lt; 1 &lt; product rigid drop impact test (a / 10) 0/10 0/10 0/10 0/10 5/10 0/10 2/10 8/10 0/10 0/10 0/10 0/10 Change in stamping processability (μηΐ) After 200,000 impacts 0 0 0 0 ) 00 CNI Τ &quot; 14.2 10.8 00 Seven CNI Seven Seven q Seven Initial T— 00 T— * C0 〇CO CM CO Inch cd ο CO CN cd LO cd 00 cd cd x— 00 τ—CO Cutter tip shape (R) (μΓΤ〇 After 200,000 impacts 00 LO CN LO CO LO inch UO τ- ΙΩ 10.0 00 Bu · ο inch LO l〇id inch LO CO LO shed 〇〇〇〇〇 ο 〇oo oooo overall tensile strength (MPa) 320 305 [315_____I I 322 I 200 380 290 170 335 __325__ 320 320 Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative example 2 Comparative example 3 Comparative example 4 Comparative example 5 Comparative example 6 Comparative example 7 Comparative example 8 (Please read the precautions on the back before filling this page)

This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -33- 554048 A7 _B7 V. Description of the invention (d For the overall tensile strength, obtain the tensile test by making JI s No. 5 test piece (Please read the precautions on the back before filling in this page.) For press workability, perform a continuous cutting test under the conditions shown in Figure 4, and measure the change in the shape of the cutter tip (R) and the amount of change. In the continuous cutting process test, a low-viscosity volatile pressure oil AF-2A (manufactured by Idemitsu Kosan Co., Ltd.) was used as the press oil, and the amount of oil was 1 g / m2. In addition, as a cutting tool (cutting knife) The material is SKD11 (JIS), and the clearance of the cutter is set to 20 // m. Moreover, the processing speed is 300 cm / min, the stroke length is 3 mm, and the cutting length is 30 mm. The shape of the cutter tip (R) The measurement was performed using a shape measuring device (SED36D: manufactured by Kosaka Laboratories Co., Ltd .; stylus R = 2 # m). The amount of change was measured from the convex portion to the burr shown in the schematic cross-sectional shape of the cut portion in FIG. 4. Dimensions of the tip. The number of continuous cutting operations is 20 After 10,000 impacts, the initial state and the shape of the cutter tip (R) and the amount of change after 200,000 impacts are measured. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The shape shown in the figure is made into a sliding door, and then the sliding door is assembled on the floppy disk case shown in FIG. 1 and dropped from a height of 1 m from the floor to make the floppy disk shown in FIG. 1. The corners of the box body hit the floor, thereby making a judgment. The judgment is performed by calculating η = 10 for each test material, and calculating the number of sliding door deformations falling off the box body. For bending workability, The thickness of the test material is a 90 °-〇R bending test with a bending radius. The bending part is observed with a solid microscope at 50 to 200 times, and the fracture state of the bending part is evaluated. As this paper standard, Chinese national standards apply. (CNsTa4 specification (210X297 mm) &quot; '-34- 554048 A7 B7 V. Description of the invention (4 Evaluation, evaluation without cracking is 0, evaluation with micro cracking is △, evaluation with large cracking is X. (Please Read the notes on the back first Please fill in this page again.) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs as shown in Table 3. Example 1 is within the scope of the present invention, and the overall tensile strength is in the range of 3 0 ~ 3 5 0 Μ Pa. Good press workability 'After the continuous cutting process, the shape of the cutter tip (R) hardly changes, and no increase in burrs can be seen. In addition, even in the drop impact test, the sliding door does not deform and fall off the box. It has sufficient product rigidity. Although the composition of Comparative Example 1 is within the scope of the present invention, due to the high heating temperature of the stabilization treatment, the overall tensile strength is 2 〇 Μ Μ Pa, which is lower than the scope of the present invention. The processability is good, but the sliding door deforms and falls off during the drop impact test, and the product has insufficient rigidity. In Comparative Example 2, the overall tensile strength was 3 8 OM Pa, which was too high, so the product had good rigidity, but poor press workability. In continuous cutting processing, the increase in the shape of the cutter tip (R) was observed. You can also see an increase in glitches. In Comparative Example 3, the overall tensile strength was as low as 290 MPa, and the product was insufficient in rigidity. At the same time, in terms of composition, A 1 -F e-Μη-based crystals having improved cutting properties were not sufficiently formed. The fracture is poor. In continuous cutting, an increase in the shape of the cutter tip (R) can be seen, and in addition, an increase in burrs can be seen. The overall tensile strength of Comparative Example 4 was 170 MPa. Outside the scope of the present invention, although the press workability was good, in the drop impact test, the sliding door deformed and fell off, and the product had insufficient rigidity. In Comparative Example 5, since the amount of M η added was too large, the formation of large crystals and the number of crystals increased, and the formability was reduced. Therefore, in terms of bending workability, minute cracks occurred in the bending portion, and the bending workability was insufficient. Comparative Example 6 Because the paper size of Fe is suitable for the Chinese national standard (CNS) A4 specification (210X297 mm) -35- 554048 A7 B7 V. Description of the invention (4 The amount is too large, so the formation and crystallization of huge crystals As the number of products generated increases and the formability decreases, the bending workability causes slight cracks in the bent portion and the bending workability is insufficient. Comparative Example 7 has too few chromate coatings. A slight crack was generated in the bent portion, and the bending workability was insufficient. In Comparative Example 8, since there was too much chromate coating, a small crack occurred in the bent portion in terms of bending workability, and the bending workability was insufficient. [Simplified description of the drawing] Figure 1: A front view showing a floppy disk as a recording medium. Figure 2: A perspective view showing a sliding door used in the floppy disk case. Figure 3: A sectional view of the sliding door. Figure 4: A diagram illustrating the test conditions of the embodiment of the present invention. [Element comparison table] 1: Sliding door 2: Box body 3: Recording medium 4: Window section The paper size applies the Chinese National Standard (CNS) Α4 specification (210 X 297 mm) (Please read the precautions on the back before filling out this page)

Claims (1)

A8 B8 C8 D8 Public patent application scope 1 (Please read the precautions on the back before filling out this page) 1 · A sliding door made of aluminum alloy plate for recording media box is provided on the box housing the recording medium. Opening / closing a sliding door made of an aluminum alloy plate for a window portion of the recording head, the sliding door is composed of: an aluminum alloy substrate, the aluminum alloy containing Mg: 2 · 2 to 2.8% by mass, and Mn: 0 · 35 to 0 · 55 dead quality! 7 e: 0. 1 to 0. 4 mass%; a chromate film as a first layer is provided on at least the surface on the outer side of the sliding door of the recording medium case made of the aluminum alloy substrate, This chromate film is set to 5 ~ 50 ing / m 2 in terms of the amount of chromium deposited, and is made of an acrylic-modified polyester urethane-based resin provided as the second layer on the outer side of the sliding door. Film, the film composed of acrylate-modified polyester urethane-based resin, the film thickness is 0.5 to 3 μm, in the above-mentioned acrylate-modified polyester urethane-based resin 100 weight ratio It contains inorganic fine particles having a weight ratio of 5 to 20 and an average particle size of 10 μm or less, and the weight ratio of the acrylic ester-modified polyester urethane-based resin 100 is a weight ratio of 0.5 to 3 weight Ratio of oxidized polyethylene based lubricant. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs2. For example, the aluminum alloy plate sliding door of the recording medium box of the first patent application range, wherein the inorganic particles are at least one selected from colloidal silica, talc and mica . 3 · If the sliding door of the aluminum alloy plate of the recording medium box of item 1 of the patent application scope, wherein the tensile strength of the aluminum alloy plate is 300 ~ 350 MPa. This paper size applies Chinese national standards ( CNS) A4 size (21 × 297 mm) -37-