Writing and projection integrated board and production process thereof

Abstract

The writing and projection integrated board comprises a board body, the board body comprises an aluminum board layer, a first surface coating and a second surface coating, the aluminum board layer is provided with a plurality of through holes, the first surface of the aluminum board layer is coated with the first surface coating, when the first surface coating is coated, part of the first surface coating penetrates through the through holes, and the second surface coating is coated with the second surface coating. An overflow part is formed in the through hole and overflows to the second surface of the aluminum plate layer to form an overflow part; and the second surface of the aluminum plate layer is coated with the second surface coating, and the second surface coating can cover the overflow part at the through hole. A plurality of through holes are formed in the aluminum plate layer, the coating of the first surface coating can overflow from the through holes in the coating process to form the overflow parts and the overflow parts, additional structure reinforcing anchor points can be formed between the aluminum plate layer and the coating of the first surface coating, the bonding face of the first surface coating and the aluminum plate layer can be increased, and the service life of the aluminum plate layer is prolonged. Furthermore, the binding strength of the first surface coating after coating can be ensured.

Description

Technical Field

[0001] The invention relates to aluminum material processing equipment, and more specifically, to a production process of a writing and projection integrated board, and also to a writing and projection integrated board produced by the process. Background Art

[0002] When processing aluminum sheets, it is usually necessary to coat the surface of the aluminum sheet with the required slurry, so that a coating with the required function can be formed on the surface of the aluminum sheet, thereby improving the applicability of the aluminum sheet.

[0003] At present, there is an aluminum sheet suitable for writing on the market. The surface of the aluminum sheet is coated with a white coating, which can be used for writing with a black water-based pen. In addition, in order to improve the texture of the sheet surface, the surface layer usually adopts a frosted texture, and the surface can form a diffuse reflection effect, which can be used for both writing and projection. However, the coating on the surface of this aluminum sheet generally requires a larger thickness, generally 0.50mm-1.5mm. Due to the thicker thickness and insufficient fastness, it is easy to fall off after coating, causing the surface of the aluminum sheet to be easily damaged.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a writing and projection integrated board and a production process thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A production process for an integrated writing and projection board, the integrated writing and projection board comprising a board body, the board body comprising an aluminum plate layer, a first surface coating layer and a second surface coating layer, the aluminum plate layer being provided with a plurality of through holes, the first surface coating layer being coated on a first surface of the aluminum plate layer, when the first surface coating layer is coated, a portion of the first surface coating layer passes through the through holes to form an overflow portion in the through holes, and overflows to a second surface of the aluminum plate layer to form an overflow portion; the second surface coating layer is coated on the second surface of the aluminum plate layer, and the second surface coating layer can cover the overflow portion at the through hole.

[0008] The present invention is further configured such that during the coating process of the first surface coating, the second surface of the aluminum plate layer is heated, the overflow portion and the overflow portion are partially solidified, and then the first surface coating is solidified and formed; and then, the second surface coating is coated.

[0009] The present invention is further configured such that the aluminum plate layer is provided with a plurality of groups of through holes, each group of through holes is distributed along the length direction of the aluminum plate layer; and each group of through holes is distributed in the width direction of the aluminum plate layer.

[0010] The present invention is further configured such that each group of through holes includes two rows of through holes distributed along the length direction of the aluminum plate layer.

[0011] The present invention is further configured that the top coating layer is coated by a coating device during the coating process;

[0012] The coating device includes a coating roller, a scraper roller and a supporting roller mechanism, wherein the coating roller is located at the lower side of the supporting roller mechanism, and the scraper roller is located at the upper side of the scraper roller. During the coating process, the aluminum plate layer is input from between the supporting roller mechanism and the coating roller, passes through the supporting roller mechanism, and then output from between the scraper roller and the supporting roller mechanism; the scraper roller is used to coat the first side of the aluminum plate layer, and the scraper roller can evenly scrape the surface after the coating layer is applied; the portion of the aluminum plate layer passing through the supporting roller mechanism forms a coating section.

[0013] The present invention is further configured such that the support roller mechanism includes a support shaft, a plurality of annular protrusions are fixedly connected to the outer periphery of the support shaft, and annular grooves are formed between the connected annular protrusions; the annular grooves correspond to the through holes of the aluminum plate layer.

[0014] The present invention is further configured such that the support roller mechanism further includes an arc-shaped stopper, which is in a C-shaped structure, embedded in the annular groove portion, and surrounds the outer circumference of the support shaft; an arc-shaped space is formed between the two ends of the arc-shaped stopper and between the support shaft and the coating section;

[0015] The present invention is further configured such that a hollow air inlet passage is formed in the upper half of the inner portion of the arc-shaped baffle, an opening 1 is provided at the upper end of the arc-shaped baffle at a position opposite to the arc-shaped space, and an air inlet through hole is provided at one end of the air inlet passage away from the opening 1 and extending to the outer side of the arc-shaped baffle; a heater is provided in the air inlet passage;

[0016] The present invention is further configured such that a hollow air outlet channel is formed in the inner lower half of the arc-shaped baffle, an opening 2 is provided at the lower end of the arc-shaped baffle opposite to the arc-shaped space, an air guide outlet is provided at one end of the air outlet channel away from the opening 2, and the air guide outlet is connected to the exhaust device to form a negative pressure airflow.

[0017] The present invention is further configured to further include a support tube, the support tube is arranged along the width direction of the aluminum plate layer, and each arc-shaped stopper is fixedly installed on the outer periphery of the support tube; an air guide channel is formed in the support tube; the air outlet channel is connected to the air guide channel through the air guide outlet;

[0018] The present invention is further configured such that a central hole is provided in the support shaft and is circumferentially penetrating, one end of the central hole is connected to the air guide channel through an air guide pipe, and the other end of the central hole is connected to an exhaust device.

[0019] The present invention is further configured such that the arc-shaped baffle also includes an arc-shaped scraper, which is fixedly connected to the upper side of the arc-shaped baffle, and the arc-shaped scraper includes a scraper guard edge, which is in close contact with the second surface of the aluminum plate layer, and the scraper guard edge and the scraping portion of the scraper roller are respectively located on both sides of the aluminum plate layer, for jointly providing limiting support for the aluminum plate layer.

[0020] The present invention also provides a writing and projection integrated board, which is produced by adopting the above-mentioned production process to produce a board body suitable for writing and projection.

[0021] In summary, the present invention has the following beneficial effects:

[0022] By opening a number of through holes in the aluminum plate layer, and allowing the paint of the topcoat layer to overflow from the through holes during the coating process to form overflow portions and overflow portions, additional structural reinforcement anchor points can be formed between the aluminum plate layer and the paint of the topcoat layer, which can increase the bonding surface between the topcoat layer and the aluminum plate layer, thereby ensuring the bonding strength of the topcoat layer after coating.

[0023] By adopting the reinforced anchor points formed by the overflow part and the overflow part, the bonding strength of the surface coating 1 can be improved. Even if the surface coating 1 is relatively thick, the bonding stability between the surface coating 1 and the aluminum plate layer can be maintained, and the adhesion strength of the surface coating 1 can be maintained, thus avoiding the situation where the surface coating 1 is easy to fall off due to its thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of the writing and projection integrated plate in this embodiment;

[0025] Figure 2 This is a schematic diagram of the structure of the aluminum plate layer in this embodiment;

[0026] Figure 3 is a three-dimensional diagram of the coating device in this embodiment;

[0027] Figure 4 is a side view of the coating device in this embodiment;

[0028] Figure 5 Schematic diagram of the structure of the support roller mechanism in this embodiment;

[0029] Figure 6 The cross-sectional view of the support roller mechanism in this embodiment is shown in FIG. Figure 1 ;

[0030] Figure 7 is a side cross-sectional view of the coating device in this embodiment;

[0031] Figure 8 The cross-sectional view of the support roller mechanism in this embodiment is shown in FIG. Figure 2 ;

[0032] Fig. 9 The cross-sectional view of the support roller mechanism in this embodiment is shown in FIG. Figure 3 .

[0033] Figure numerals: plate body 1; aluminum plate layer 11; through hole 111; surface coating layer 12; overflow portion 121; overflow portion 122; surface coating layer 2 13; coating section 100; coating roller 2; scraper roller 3; scraper portion 31; support roller mechanism 4; support shaft 41; center hole 411; annular convex portion 42; annular groove portion 43; arc space 431; arc block 44; air inlet channel 441; opening 1 4411; air inlet through hole 4412; heater 4413; air outlet channel 442; opening 2 4421; air guide outlet 4422; arc scraper 45; scraper retaining edge 451; support tube 46; air guide channel 461; air guide tube 47; guide roller 5. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] This embodiment discloses a production process for a writing and projection integrated board, and the production process is adopted to produce and process the writing and projection integrated board.

[0036] Reference Figure 1 , Figure 2 As shown, the writing and projection integrated board in this embodiment includes a board body 1, which includes an aluminum plate layer 11, a topcoat layer 12 and a topcoat layer 2 13, and the topcoat layer 12 and the topcoat layer 2 13 are coated on both sides of the aluminum plate layer 11 respectively.

[0037] The outer side of the topcoat 12 can be used for writing and projection. The topcoat 12 is generally white and has a frosted surface, which can achieve diffuse reflection, avoid the mirror effect, and have a good visual effect. The topcoat 12 needs to have a certain thickness, generally 0.50mm-1.5mm, to form a sufficient thickness. A thicker topcoat 12 is prone to detachment, especially in the process of winding and bending, the topcoat 12 is more likely to crack and fall off.

[0038] A plurality of through holes 111 are formed in the aluminum plate layer 11, and the topcoat layer 12 is coated on the first surface of the aluminum plate layer 11. When the topcoat layer 12 is coated, part of the topcoat layer 12 passes through the through holes 111, forming an overflow portion 121 in the through holes 111, and overflows to the second surface of the aluminum plate layer 11 to form an overflow portion 122.

[0039] The overflow portion 122 and the surface coating 12 are respectively on both sides of the aluminum plate layer 11, and with the help of the overflow portion 121, the overflow portion 121 can connect the parts on both sides of the aluminum plate layer 11, which can increase the bonding surface between the surface coating 12 and the aluminum plate layer 11, and thus ensure the bonding strength of the surface coating 12 after coating.

[0040] The second topcoat layer 13 is coated on the second surface of the aluminum plate layer 11, and the second topcoat layer 13 can cover the overflow portion 122 at the through hole 111. After coating, the second topcoat layer 13 can be combined with the overflow portion 122, and the second surface of the aluminum plate layer 11 can be coated to form another surface.

[0041] During the coating process of the top coating layer 12, the second surface of the aluminum plate layer 11 is heated, and the overflow portion 121 and the overflow portion 122 of the coated slurry are partially solidified during the overflow and penetration process. Then, the top coating layer 12 is cured and formed until the top coating layer 12 can be completely formed.

[0042] Then, the second top coating 13 is applied, and during the coating process, the second top coating 13 covers the second surface of the aluminum plate layer 11 and the overflow portion 122. Then, the surface of the second top coating 13 is scraped flat and dried and solidified.

[0043] Reference Figure 2 As shown, the aluminum plate layer 11 is provided with a plurality of groups of through holes 111, and each group of through holes 111 is distributed along the length direction of the aluminum plate layer 11. Moreover, each group of through holes 111 is distributed in the width direction of the aluminum plate layer 11, and the through holes 111 are evenly arranged in a stripe-like structure, which can maintain the uniformity of the distribution of the through holes 111 and ensure that the back side of the top coating 12 has a uniform additionally attached reinforcement structure.

[0044] Specifically, each group of through holes 111 includes two rows of through holes 111 distributed along the length direction of the aluminum plate layer 11. The aperture of the through holes 111 can be 0.1-0.3 cm, which can allow the coating slurry to pass through and maintain a uniform adhesion effect.

[0045] Reference Figure 3-Figure 9 As shown, the top coating layer 12 is coated by a coating device during the coating process;

[0046] The coating device includes a coating roller 2, a scraper roller 3 and a support roller mechanism 4, wherein the coating roller 2 is located at the lower side of the support roller mechanism 4, and the scraper roller 3 is located at the upper side of the scraper roller 3. During the coating process, the aluminum plate layer 11 is input from between the support roller mechanism 4 and the coating roller 2, passes through the support roller mechanism 4, and then output from between the scraper roller 3 and the support roller mechanism 4.

[0047] The slurry to be coated is attached to the lower part of the scraper roller 3. After the scraper roller 3 contacts the surface of the aluminum plate layer 11, it can coat the first surface of the aluminum plate layer 11. The scraper roller 3 can scrape the surface of the coated slurry, and can evenly scrape the surface after the top coating layer 12 is coated, so that a top coating layer 12 of a corresponding thickness can be formed on the surface of the aluminum plate layer 11.

[0048] Correspondingly, the portion of the aluminum plate layer 11 that passes around the supporting roller mechanism 4 forms a coating section 100 .

[0049] Reference Figure 5 , Figure 6 As shown, the support roller mechanism 4 includes a support shaft 41, both ends of the support shaft 41 are rotatably supported on the equipment frame through bearings, and a plurality of annular protrusions 42 are fixedly connected to the outer periphery of the support shaft 41. An annular groove 43 is formed between the connected annular protrusions 42, and the annular groove 43 corresponds to the through hole 111 of the aluminum plate layer 11, so that the annular protrusion 42 can be prevented from affecting the overflow part 121 and the overflow part 122 formed by the overflow at the through hole 111. The annular groove 43 can form an annular clearance space on the outer periphery of the support shaft 41.

[0050] In addition, the support roller mechanism 4 further includes an arc-shaped stopper 44, which is a C-shaped structure, embedded in the annular groove 43, and surrounds the outer periphery of the support shaft 41. The arc-shaped stopper 44 can form a partial block in the annular groove 43. An arc-shaped space 431 is formed between the two ends of the arc-shaped stopper 44 and the support shaft 41 and the coating section 100. The outer periphery size of the arc-shaped stopper 44 is adapted to the outer periphery size of the annular convex portion 42, so that a narrow gap can be formed between the outer periphery of the arc-shaped stopper 44 and the aluminum plate layer 11, and the arc-shaped space 431 can form a roughly distributed space.

[0051] Reference Figure 8 , Fig. 9 As shown, an upper end and a lower end are formed on the upper and lower sides of the arc-shaped block 44, respectively. A hollow air inlet channel 441 is formed in the upper half of the inner part of the arc-shaped block 44, and the air inlet channel 441 forms an arc-shaped channel. An opening 4411 is provided at the upper end of the arc-shaped block 44 at a position opposite to the arc-shaped space 431, and an air inlet through hole 4412 is provided at one end of the air inlet channel 441 away from the opening 4411 and extending to the outside of the arc-shaped block 44; a heater 4413 is provided in the air inlet channel 441. The heater 4413 can generally be an electric heater, which can generate the heat required for heating and maintain the required temperature.

[0052] A hollow air outlet channel 442 is formed in the lower half of the inner part of the arc-shaped baffle 44 , a second opening 4421 is formed at the lower end of the arc-shaped baffle 44 opposite to the arc-shaped space 431 , and an air guide outlet 4422 is formed at one end of the air outlet channel 442 away from the second opening 4421 .

[0053] The air guide outlet 4422 is connected to the exhaust device, and under the action of negative pressure, a negative pressure airflow can be formed.

[0054] In addition, the coating device further comprises a support tube 46, which is arranged along the width direction of the aluminum plate layer 11. The support tube 46 is fixedly mounted on the frame, and each arc-shaped stopper 44 is fixedly mounted on the outer periphery of the support tube 46, so that the support tube 46 can play a supporting and fixing role.

[0055] An air guiding channel 461 is formed in the support tube 46 , and the air outlet channel 442 is connected to the air guiding channel 461 through the air guiding outlet 4422 .

[0056] A central hole 411 is provided in the support shaft 41, and one end of the central hole 411 is connected to the air guide channel 461 through the air guide pipe. The other end of the central hole 411 is connected to the air exhaust device.

[0057] Reference Figure 5 , Figure 8 , Fig. 9 As shown, under the negative pressure of the exhaust device, negative pressure is generated in the central hole 411 of the support shaft 41 and the air guide channel 461 of the support tube 46 , and then corresponding negative pressure can also be generated in the annular groove 43 .

[0058] After negative pressure is generated in the annular groove portion 43, since the outer surface of the coating section 100 has been coated with the slurry of the top coating layer 12, the through holes 111 of the aluminum plate layer 11 can be covered by the slurry of the top coating layer 12, and part of the coating slurry can penetrate the through holes 111 of the aluminum plate layer 11 under the action of the negative pressure and enter the second side of the aluminum plate layer 11, thereby forming an overflow portion 121 and an overflow portion 122.

[0059] Most of the airflow in the annular groove portion 43 is input into the air inlet channel 441 from the air inlet hole 4412. The heater 4413 in the air inlet channel 441 can heat to form hot air, and then flow into the arc space 431. The hot air flows through the inner surface of the aluminum plate layer 11, and then enters the air guide channel 461 of the support tube 46 from the air outlet channel 442, thereby realizing the circulation of hot air.

[0060] In addition, when the hot air flows through the air guide channel 461 of the support tube 46, it can flow through the central hole 411 of the support shaft 41. When the hot air flows through the support shaft 41, the heat can also be transferred to the scraper roller 3 and the annular convex portion 42, so that the heat can be evenly transferred to the surface of the support shaft 41 and the annular convex portion 42. A certain degree of heating can also be achieved through the support shaft 41 and the annular convex portion 42, so that the coating section 100 of the aluminum plate layer 11 can be heated and maintained at a temperature more effectively.

[0061] In addition, the arc-shaped stopper 44 further includes an arc-shaped scraper 45, which is fixedly connected to the upper side of the arc-shaped stopper 44 and has an arc-shaped structure. The arc-shaped scraper 45 includes a scraper retaining edge 451, which is in close contact with the second surface of the aluminum plate layer 11.

[0062] The scraper rib 451 and the scraper portion 31 of the scraper roller 3 are respectively located on both sides of the aluminum plate layer 11, and are used to jointly limit and support the aluminum plate layer 11. The scraper rib 451 of the arc-shaped scraper 45 can also perform surface scraping on the second surface of the aluminum plate layer 11, and evenly scrape the excess portion of the overflow portion 122, thereby maintaining the surface flatness of the overflow portion 122 and avoiding an excessively high protrusion state.

[0063] In addition, the height of the scraper roller 3 can also be adjusted. By adjusting the position of the scraper roller 3 and the scraper portion 31, the coating thickness of the top coating layer 12 can be adjusted as required.

[0064] This embodiment also discloses a writing and projection integrated board. The board body 1 is produced by adopting the production process in the above embodiment to obtain a writing and projection integrated board.

[0065] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A production process for a writing and projection integrated board, characterized in that: The writing and projection integrated board comprises a board body (1), wherein the board body (1) comprises an aluminum plate layer (11), a first surface coating layer (12) and a second surface coating layer (13); the aluminum plate layer (11) is provided with a plurality of through holes (111); the first surface coating layer (12) is coated on a first surface of the aluminum plate layer (11); when the first surface coating layer (12) is coated, a portion of the first surface coating layer (12) passes through the through holes (111), forming an overflow portion (121) in the through holes (111), and overflows to a second surface of the aluminum plate layer (11) to form an overflow portion (122); the second surface coating layer (13) is coated on the second surface of the aluminum plate layer (11), and the second surface coating layer (13) can cover the overflow portion (122) at the through holes (111).

2. The production process of the writing and projection integrated board according to claim 1, characterized in that: During the coating process of the first surface coating (12), the second surface of the aluminum plate layer (11) is heated, and the overflow portion (121) and the overflow portion (122) are partially solidified, and then the first surface coating (12) is solidified and formed; then, the second surface coating (13) is coated.

3. The production process of the writing and projection integrated board according to claim 1, characterized in that: The aluminum plate layer (11) is provided with a plurality of groups of through holes (111), each group of through holes (111) is distributed along the length direction of the aluminum plate layer (11); and each group of through holes (111) is distributed in the width direction of the aluminum plate layer (11).

4. The production process of the writing and projection integrated board according to claim 3, characterized in that: Each group of through holes (111) comprises two rows of through holes (111) distributed along the length direction of the aluminum plate layer (11).

5. The production process of the writing and projection integrated board according to claim 1, characterized in that: The top coating layer (12) is coated by a coating device during the coating process; The coating device comprises a coating roller (2), a scraper roller (3) and a supporting roller mechanism (4); the coating roller (2) is located at the lower side of the supporting roller mechanism (4), and the scraper roller (3) is located at the upper side of the scraper roller (3); during the coating process, the aluminum plate layer (11) is input from between the supporting roller mechanism (4) and the coating roller (2), passes through the supporting roller mechanism (4), and then output from between the scraper roller (3) and the supporting roller mechanism (4); the scraper roller (3) is used to coat the first surface of the aluminum plate layer (11), and the scraper roller (3) can evenly scrape the surface after the coating layer (12) is applied; the portion of the aluminum plate layer (11) passing through the supporting roller mechanism (4) forms a coating section (100).

6. The process for producing a writing and projection integrated board according to claim 5, characterized in that: The support roller mechanism (4) comprises a support shaft (41), the outer periphery of which is fixedly connected with a plurality of annular protrusions (42), annular grooves (43) are formed between the connected annular protrusions (42); the annular grooves (43) correspond to the through holes (111) of the aluminum plate layer (11).

7. The process for producing a writing and projection integrated board according to claim 6, characterized in that: The support roller mechanism (4) further comprises an arc-shaped stopper (44), wherein the arc-shaped stopper (44) is of a C-shaped structure, embedded in the annular groove (43), and surrounds the outer circumference of the support shaft (41); an arc-shaped space (431) is formed between the two ends of the arc-shaped stopper (44) and the support shaft (41) and the coating section (100); A hollow air inlet passage (441) is formed in the upper half of the arc-shaped blocking member (44); an opening (4411) is provided at the upper end of the arc-shaped blocking member (44) at a position opposite to the arc-shaped space (431); an air inlet through hole (4412) is provided at one end of the air inlet passage (441) away from the opening (4411) and extending to the outside of the arc-shaped blocking member (44); a heater (4413) is provided in the air inlet passage (441); A hollow air outlet channel (442) is formed in the lower half of the inner part of the arc-shaped baffle (44); a second opening (4421) is provided at a position of the lower end of the arc-shaped baffle (44) opposite to the arc-shaped space (431); an air guide outlet (4422) is provided at one end of the air outlet channel (442) away from the second opening (4421); the air guide outlet (4422) is externally connected to an exhaust device to form a negative pressure airflow.

8. The process for producing a writing and projection integrated board according to claim 7, characterized in that: It also includes a support tube (46), the support tube (46) is arranged along the width direction of the aluminum plate layer (11), and each arc-shaped blocking member (44) is fixedly installed on the outer periphery of the support tube (46); an air guide channel (461) is formed in the support tube (46); the air outlet channel (442) is connected to the air guide channel (461) through an air guide outlet (4422); The support shaft (41) is provided with a circumferentially penetrating central hole (411), one end of the central hole (411) is connected to the air guide channel (461) through an air guide pipe, and the other end of the central hole (411) is connected to an exhaust device.

9. The process for producing a writing and projection integrated board according to claim 8, characterized in that: The arc-shaped stopper (44) further comprises an arc-shaped scraper (45), wherein the arc-shaped scraper (45) is fixedly connected to the upper side of the arc-shaped stopper (44), wherein the arc-shaped scraper (45) comprises a scraper retaining edge (451), wherein the scraper retaining edge (451) is in close contact with the second surface of the aluminum plate layer (11), and wherein the scraper retaining edge (451) and the scraping portion (31) of the scraper roller (3) are respectively located on both sides of the aluminum plate layer (11) and are used to jointly provide position-limiting support for the aluminum plate layer (11).

10. A writing and projection integrated board, characterized in that: The production is carried out using the production process described in any one of claims 1 to 9.

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