Membrane sticker manufacturing process

Abstract

A first lamination forming process (a) for forming a first laminate (10) in which an upper release liner (30) and a lower release liner (40) are laminated on the upper and lower surfaces of a bonding sheet (20), respectively; a first cutting process (b) for cutting the upper release liner (30) and the bonding sheet (20) into a closed loop shape from the upper surface of the first laminate (10); a cutting portion removal process (c, d, e) for forming a second laminate (11) in which a concave groove (12) is formed on the upper surface by removing the release liner piece (31) of the upper release liner (30) and the bonding piece (21) of the bonding sheet (20) cut in the first cutting process (b); and a membrane lamination forming process (e) for forming a membrane laminate (13) by laminating a membrane sheet (50) on the upper surface of the second laminate (11). A method for manufacturing a membrane sticker is characterized by comprising: a second cutting process (f) of cutting the bonding sheet (20) and the membrane sheet (50) of the above membrane laminate (13) along the periphery of the above concave groove (12); and a blanking process (g) of removing the remaining part cut in the second cutting process (f) to form a membrane sticker (60) in the form of a membrane sheet (50) and a bonding sheet (20) provided on the bottom edge of the membrane sheet (50).

Description

Technology Field

[0001] The present invention relates to a method for manufacturing a membrane sticker, and more specifically, to a method for manufacturing a membrane sheet that can manufacture a membrane sticker having breathability, water resistance, and dust resistance for electronic devices without damage. Background Technology

[0002] In general, various electronic devices such as mobile devices, hearing aids, communication equipment such as radios, and car headlamps require waterproof performance to prevent water / liquid from penetrating into the electronic device and dustproof performance to prevent contamination / dust from penetrating, while maintaining pressure equilibrium inside / outside the electronic device by providing breathability to the electronic device. Accordingly, membrane stickers having both waterproof / dustproof and breathability properties are attached to the components of electronic devices.

[0003] Conventional membrane stickers are produced by press-forming a laminate in which adhesive tape and a membrane sheet are laminated onto a release liner. At this time, since many electronic device components are very small, membrane stickers used for such very small components are press-formed using pins with a very small diameter.

[0004] However, if press processing is performed using a pin with a very small diameter as in the conventional method, the pin penetrates the laminate and creates burrs on the membrane sheet and bonding sheet, and these burrs damage the membrane sheet, which is soft and has low strength, and as a result, the water resistance and dust resistance of the membrane sticker are reduced. Prior art literature

[0005] Korean Registered Patent Publication No. 10-1812787 The problem to be solved

[0006] The present invention is intended to solve the problems described above, and the objective of the present invention is to provide a method for manufacturing a membrane sticker that can be easily manufactured without damage and without degradation of function, with excellent breathability, water resistance, and dust resistance for use in small electronic components. means of solving the problem

[0007] According to a feature of the present invention, a first laminate forming process (a) for forming a first laminate (10) in which an upper release liner (30) and a lower release liner (40) are laminated on the upper and lower surfaces of a bonding sheet (20), respectively; a first cutting process (b) for cutting the upper release liner (30) and the bonding sheet (20) into a closed loop shape on the upper surface of the first laminate (10); a cutting portion removal process (c, d, e) for forming a second laminate (11) in which a concave groove (12) is formed on the upper surface by removing the release liner piece (31) of the upper release liner (30) and the bonding piece (21) of the bonding sheet (20) cut in the first cutting process (b); and a membrane laminate forming process (e) for forming a membrane laminate (13) by laminating a membrane sheet (50) on the upper surface of the second laminate (11). A method for manufacturing a membrane sticker is provided, characterized by comprising: a second cutting process (f) of cutting the bonding sheet (20) and the membrane sheet (50) of the above membrane laminate (13) along the periphery of the above concave groove (12); and a blanking process (g) of removing the remaining part cut in the second cutting process (f) to form a membrane sticker (60) in the form of a membrane sheet (50) and a bonding sheet (20) provided on the bottom edge of the membrane sheet (50).

[0008] According to another feature of the present invention, a method for manufacturing a membrane sticker is provided, characterized in that the cutting portion removal process (d) comprises: a process (c) of removing a release paper piece (31) so that the bonding piece (21) of the first laminate (10) is exposed upward; a process (d) of laminating an adhesive sheet (70), which is made of a soft and elastic material and has an adhesive layer formed on its bottom surface, to the upper surface of the top release paper (30) of the first laminate (10) such that a certain portion is attached to the bonding piece (21); and a process (e) of removing the adhesive sheet (70) and the top release paper (30) together from the bonding sheet (20) while removing them together with the bonding piece (21) attached to the adhesive sheet (70).

[0009] According to another feature of the present invention, the first cutting process utilizes a cutting machine (80) comprising a lower mold (90) on which a first laminate (10) is placed on an upper surface and an upper mold (100) that is raised and lowered directly above the lower mold (90), and a plurality of cutters (101) formed in a ring shape are downwardly protruded and spaced apart from each other on the bottom surface of the upper mold (100) to cut the upper release liner (30) and bonding sheet (20) of the first laminate (10). Effects of the invention

[0010] As described above, according to the present invention, the upper surface of a first laminate (10) in which upper and lower release papers (30, 40) are laminated on the upper and lower surfaces of a bonding sheet (20) is cut with a ring-shaped cutter (101), and after removing the cut bonding piece (21) and the upper release paper (30), a membrane sheet (50) is attached, and the upper surface is precisely cut with a ring-shaped cutter (131) and the remaining part is removed to manufacture a membrane sticker (60). Since the problem of burrs being generated during the conventional pressing process by a pin is resolved, the membrane sticker (60) is not damaged by burrs, thereby improving water resistance and dust resistance. Furthermore, as the membrane sheet (50) is not laminated from the beginning as described above, the cutting process of the membrane sheet (50) is reduced, and the above effect is further enhanced.

[0011] And, by using an adhesive sheet (70) that is soft and elastic and has an adhesive layer formed thereon, the bonding piece (21) can be easily removed by bending it through the opening (32) of the upper release liner (30) formed by cutting and removing and attaching it to the bonding piece (21). Accordingly, while making it easy to manufacture, the occurrence of burrs is more effectively prevented compared to removing the bonding piece (21) by punching it with a pin as in the conventional method.

[0012] And, a ring-shaped cutter (101) forms a release paper piece (31) and a bonding piece (21) on the upper surface of the first laminate (10) using a cutting machine (80) provided in the lower mold (90), and then removes the bonding piece (21) using an adhesive sheet (70) as described above to form a concave groove (12), so that the occurrence of burrs on the bonding sheet (20) of the first laminate (10) is prevented more effectively compared to when a pin is punched from the top, and thus damage to the membrane sticker (60) can be prevented more effectively. Brief explanation of the drawing

[0013] FIGS. 1A and 1B are process diagrams illustrating an embodiment of a method for manufacturing a membrane sticker according to the present invention. FIGS. 2 and FIGS. 3 are drawings showing the cutting of the above embodiment. Specific details for implementing the invention

[0014] The objectives, features, and advantages of the present invention described above will become clearer through the following detailed description. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings as follows.

[0015] FIGS. 1a to 3 are drawings illustrating a method for manufacturing a membrane sticker according to an embodiment of the present invention. As described above, a method for manufacturing a membrane sticker according to an embodiment of the present invention comprises: a first lamination forming process (a) for forming a first laminate (10) in which an upper release liner (30), a bonding sheet (20), and a lower release liner (40) are laminated; a first cutting process (b) for cutting the upper release liner (30) and the bonding sheet (20) of the first laminate (10) into a closed loop shape; cutting portion removal processes (c, d, e) for removing the release liner piece (31) and the bonding piece (21) cut in the first cutting process (b) to form a second laminate (11) having a concave groove (12) formed on the upper surface; a membrane lamination forming process (f) for forming a membrane laminate (13) by laminating a membrane sheet (50) on the upper surface of the second laminate (11); and the It includes a second cutting process (g) for cutting the membrane sheet (50) and bonding sheet (20) of the membrane laminate (13) into a certain shape, and a blanking process (h) for removing a portion of the cut membrane sheet (50) and bonding sheet (20).

[0016] The above first laminate formation process (a) forms a first laminate (10) in which an upper release liner (30) and a lower release liner (40) are laminated on the upper and lower surfaces of a bonding sheet (20) as shown in (a) of FIG. 1a. The first laminate (10) can be formed in various ways. For example, the upper release liner (30), the bonding sheet (20), and the lower release liner (40) can be laminated using a laminating machine, or the bonding sheet (20) can be applied to the upper surface of the lower release liner (40) and the upper release liner (30) can be attached thereon.

[0017] The first cutting process (b) above cuts the upper release liner (30) and the bonding sheet (20) into a closed loop shape on the upper part of the first laminate (10) as shown in (b) of FIG. 1a.

[0018] In the first cutting process (b) of the method for manufacturing a membrane sticker according to one embodiment of the present invention, cutting can be performed using a cutting machine (80). The cutting machine (80) includes a lower mold (90) on which the first laminate (10) is placed on the upper surface, and an upper mold (100) that is raised and lowered from directly above the lower mold (90). On the bottom surface of the upper mold (100), a plurality of cutters (101) formed in a ring shape protrude downward and are spaced apart from each other.

[0019] As shown in FIG. 2, the upper mold (100) and the lower mold (90) are joined together and the first laminate (10) is pressed, and the upper release liner (30) and the bonding sheet (20) of the first laminate (10) are cut by the cutter (101). Accordingly, the release liner piece (31), which is the cutting portion of the upper release liner (30), and the bonding piece (21), which is the cutting portion of the bonding sheet (20), are formed.

[0020] The above cutting part removal process (c, d, e) removes the release paper piece (31) and bonding piece (21) cut in the first cutting process (b), as shown in (c) and (d) of FIG. 1a and (e) of FIG. 1b.

[0021] A method for manufacturing a membrane sticker according to one embodiment of the present invention may comprise a cutting portion removal process (c, d, e), a process (c) of removing a release paper piece (31) so that the bonding piece (21) of the first laminate (10) is exposed upward, a process (d) of laminating an adhesive sheet (70) so that a certain portion is attached to the upper surface of the upper release paper (30) of the first laminate (10), and a process (e) of removing the adhesive sheet (70) and the upper release paper (30) together from the bonding sheet (20).

[0022] And in the process (c) of removing the release liner piece (31), a method may be used in which the release liner piece (31) is separated from the upper release liner (30) together with the sheet by attaching an unillustrated sheet with an adhesive layer formed on its bottom surface to the upper surface of the upper release liner (30) and then peeling it off. At this time, an opening (32) is formed in the upper release liner (30) to expose the bonding piece (21) to the top after the release liner piece (31) is removed.

[0023] And the adhesive sheet (70) is made of a soft and elastic material and has an adhesive layer formed on its bottom surface. When attached to the upper surface of the upper release liner (30) of the first laminate (10), it can be bent to be attached to the bonding piece (21) through the opening (32) of the upper release liner (30) as in (d) of FIG. 1a, so that the adhesive sheet (70) can be easily and effectively attached to the bonding piece (21).

[0024] Then, when the adhesive sheet (70) and the upper release liner (30) are removed, as shown in (e) of FIG. 1b, the bonding piece (21) is removed together, and a second laminate (11) is formed with a concave groove (12) formed on the upper surface.

[0025] The above membrane laminate formation process (f) involves laminating a membrane sheet (50) on the upper surface of the second laminate (11) as shown in (f) of FIG. 1b, and thereby forming a membrane laminate (13) in which the bottom release paper (40), bonding sheet (20), and membrane sheet (50) are laminated.

[0026] The second cutting process (g) above cuts the membrane sheet (50) and the bonding sheet (20) of the membrane laminate (13) along the periphery of the concave groove (12), as in (g) of FIG. 1B.

[0027] In the second cutting process (g) of the method for manufacturing a membrane sticker according to one embodiment of the present invention, cutting is performed using a cutting machine (110). The cutting machine (110) includes a lower mold (120) on which a membrane laminate (13) is placed on an upper surface as shown in FIG. 3, and an upper mold (130) that is raised and lowered directly above the lower mold (120). A plurality of cutters (131) formed in a ring shape are formed downwardly and spaced apart from each other from the bottom surface of the upper mold (130). At this time, the plurality of cutters (131) are arranged in a manner that wraps around the periphery of each concave groove (12) of the membrane laminate (13). The operation is the same as in the first cutting process (b).

[0028] The blanking process (h) above removes the remaining portion cut in the second cutting process (g) as in (h) of FIG. 1b to form a membrane sticker (60) in the form of a membrane sheet (50) and a bonding sheet (20) provided on the bottom edge of the membrane sheet (50). Only this membrane sticker (60) is attached to the upper surface of the bottom release liner (40). The membrane sticker (60) manufactured in this way is attached to an electronic component not shown to provide breathability, water resistance, and dust resistance to the electronic component.

[0029] In this way, since the membrane sheet (50) and the bonding sheet (20) are precisely cut by a ring-shaped cutter (101, 131), the problem of burrs occurring as pins penetrate the membrane sheet (50) and the bonding sheet (20) during press processing as in the conventional method is resolved, so the membrane sticker (60) is manufactured without damage, and its waterproof and dustproof properties are improved.

[0030] The present invention described above is not limited by the aforementioned embodiments and attached drawings, and it will be obvious to those skilled in the art that various substitutions, modifications, and changes are possible within the scope of the technical concept of the present invention. Explanation of the symbols

[0031] 10 : 1st laminate 11 : 2nd laminate 12: Concave groove 13: Membrane laminate 20 : Bonding sheet 30 : Top release liner 40 : Bottom release liner 50 : Membrane sheet 60 : Membrane Sticker 70 : Adhesive Sheet 80, 110: Cutting machine 90, 120: Lower die 100, 130: Upper mold 101, 131: Cutter

Claims

Claim 1 A first laminate forming process (a) for forming a first laminate (10) in which an upper release liner (30) and a lower release liner (40) are laminated on the upper and lower surfaces of a bonding sheet (20), respectively; A first cutting process (b) for cutting the upper release liner (30) and the bonding sheet (20) into a closed loop shape at the top of the first laminate (10); a cutting portion removal process (c, d, e) for removing the release liner piece (31) of the upper release liner (30) and the bonding piece (21) of the bonding sheet (20) cut in the first cutting process (b) to form a second laminate (11) with a concave groove (12) formed on the upper surface; a membrane laminate formation process (e) for laminating a membrane sheet (50) on the upper surface of the second laminate (11) to form a membrane laminate (13); a second cutting process (f) for cutting the bonding sheet (20) and the membrane sheet (50) of the membrane laminate (13) along the periphery of the concave groove (12); and in the second cutting process (f) A method for manufacturing a membrane sticker, characterized by including a blanking process (g) for removing the remaining cut portion to form a membrane sticker (60) in the form of a membrane sheet (50) and a bonding sheet (20) on the bottom edge of the membrane sheet (50). Claim 2 A method for manufacturing a membrane sticker according to claim 1, wherein the cutting portion removal process (c, d, e) comprises: a process (c) of removing a release paper piece (31) so that the bonding piece (21) of the first laminate (10) is exposed upward; a process (d) of laminating an adhesive sheet (70), which is made of a soft and elastic material and has an adhesive layer formed on its bottom surface, by attaching it to the upper surface of the top release paper (30) of the first laminate (10) such that a certain portion is attached to the bonding piece (21); and a process (e) of removing the adhesive sheet (70) and the top release paper (30) together from the bonding sheet (20) while removing them together with the bonding piece (21) attached to the adhesive sheet (70). Claim 3 A method for manufacturing a membrane sticker according to claim 1 or 2, wherein the first cutting process (b) uses a cutting machine (80) comprising a lower mold (90) on which the first laminate (10) is placed on the upper surface and an upper mold (100) that is raised and lowered directly above the lower mold (90), and wherein a plurality of cutters (101) formed in a ring shape are downwardly protruded and spaced apart from each other on the bottom surface of the upper mold (100) to cut the upper release liner (30) and bonding sheet (20) of the first laminate (10).

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