glass roll

Abstract

The product provided is a glass roll. The glass roll includes a winding core having a central axis, a carrier film wound around the central axis on the winding core, and a glass ribbon wound around the central axis on the carrier film and attached to the carrier film. The carrier film includes an adhesive surface in contact with the glass ribbon and a non-adhesive surface opposite the adhesive surface. The carrier film has a viscosity of 2.9 gf / in. 2 Includes the following peel-and-adhesion strengths.

Description

[Technical Field]

[0001] 1. Cross-reference of related applications This application claims the benefit of priority under Section 119 of the U.S. Patent Act for Korean Patent Application No. 10-2023-073083, filed on 7 June 2023, the contents of which are relied upon and incorporated herein by reference in their entirety.

[0002] 2. Technical Fields This disclosure relates to a glass roll. More specifically, this disclosure relates to a glass roll comprising a glass ribbon wound on a winding core and a carrier film. [Background technology]

[0003] 3. Explanation of related technologies Glass can be processed to a thin thickness and may be suitable for roll-to-roll processes. Glass suitable for roll-to-roll processes may have appropriate optical sharpness, surface quality, bendability, flexibility, and excellent thermodynamic stability. Such flexible glass can be used in a variety of applications, such as solar cells, flexible displays, and wearable electronic devices. In particular, various attempts have been proposed to integrate components of electronic devices onto glass surfaces using roll-to-roll processes for glass. Manufacturing yields can be improved as roll-to-roll processes are integrated into thin-film coating processes such as coating processes, printing processes, and deposition processes for metal layers, semiconductor layers, transparent electrode layers, inorganic material layers, and organic material layers. On the other hand, since the coating processes for metal layers, semiconductor layers, transparent electrode layers, inorganic material layers, or organic material layers for some applications are carried out at relatively high temperatures and under vacuum, there is a need to develop carrier films that have excellent compatibility with these processes and can prevent damage to the glass during the roll-to-roll process. [Overview of the project]

[0004] Glass rolls are provided that can prevent damage to the glass and facilitate the transport of glass in high-temperature processes and roll-to-roll processes.

[0005] According to one aspect of the present disclosure, a glass roll includes a winding core having a central axis, a carrier film wound around the central axis on the winding core, and a glass ribbon wound around the central axis on the carrier film and attached to the carrier film, wherein the carrier film may include an adhesive surface in contact with the glass ribbon and a non-adhesive surface opposite to the adhesive surface, and the carrier film has a density of 2.9 gf / in 2 The following peel-adhesion strengths may be included.

[0006] In some embodiments, the carrier film may have an elastic modulus of 250 MPa to 15 GPa.

[0007] In some embodiments, the glass ribbon may have a thickness of 10 to 100 micrometers, and the carrier film may have a thickness of 10 to 200 micrometers.

[0008] In some embodiments, the carrier film may have a roughness of about 30 nm or less.

[0009] In some embodiments, the carrier film is 1.1 gf / in 2 It may have the following peel-adhesion strength.

[0010] In some embodiments, the carrier film may include a base film having a first surface and a second surface, and an adhesive layer attached to the first surface of the base film, the surface of the adhesive layer defining the adhesive surface of the carrier film.

[0011] In some embodiments, the carrier film may further include a non-adhesive layer attached to a second surface of the base film, the surface of which may define the non-adhesive surface of the carrier film.

[0012] In some embodiments, the second surface of the base film defines the non-adhesive surface of the carrier film.

[0013] In some embodiments, the base film may include at least one of polypropylene and polyethylene, and the adhesive layer may include at least one of a polyolefin plastomer, an alpha-olefin copolymer, a silicone resin, and a photo-reactive adhesive material.

[0014] In some embodiments, the non-adhesive surface of the carrier film may not have adhesiveness to a portion of a glass ribbon disposed adjacent to the non-adhesive surface so as to contact the non-adhesive surface. When the non-adhesive surface of the carrier film is in contact with a portion of the glass ribbon, no component of the carrier film may be transferred onto the surface of the glass ribbon when stored at a temperature of 20 °C for more than 5 days under a load of 1.97 gf / mm 2 In some embodiments, the adhesive surface of the carrier film may have a peel adhesion force of 2.9 gf / in or less at a temperature of 20 °C to 170 °C.

[0015] In some embodiments, the adhesive surface of the carrier film may have a peel adhesion force of 2.9 gf / in or less at a temperature of 20 °C to 170 °C. 2 as follows.

[0016] According to another aspect of the present disclosure, a glass roll includes a winding core having a central axis, a carrier film wound around the central axis on the winding core, and a glass ribbon wound around the central axis on the carrier film and attached to the carrier film. The carrier film may include a base film including a first surface and a second surface opposite to the first surface, and an adhesive layer attached on the first surface of the base film. The carrier film may include an adhesive surface and a non-adhesive surface opposite to the adhesive surface. The second surface of the base film forms the non-adhesive surface. The carrier film is attached to the glass ribbon such that the adhesive layer contacts the glass ribbon. The carrier film may include a peel adhesion force of 2.9 gf / in 2 or less, the glass roll.

[0017] In some embodiments, the carrier film may have a modulus of elasticity of 250 MPa to 15 GPa, and the glass ribbon may have a thickness of 10 micrometers to 100 micrometers.

[0018] In some embodiments, the carrier film may have a roughness of 30 nm or less.

[0019] In some embodiments, the carrier film may have a peel adhesion of 1.1 gf / in 2 or less.

[0020] According to one aspect of the present disclosure, a glass roll including a winding core having a central axis, a carrier film wound around the central axis on the winding core, and a glass ribbon wound around the central axis on the carrier film and attached to the carrier film, wherein the carrier film may include an adhesive surface and a non-adhesive surface opposite to the adhesive surface, and the carrier film may include a peel adhesion of 2.9 gf / in 2 or less and a modulus of elasticity in the range of 250 MPa to 15 GPa.

[0021] In some embodiments, the base film may include at least one of polypropylene and polyethylene, and the adhesive layer may include at least one of a polyolefin plastomer, an alpha-olefin copolymer, a silicone resin, and a photo-reactive adhesive material.

[0022] In some embodiments, the non-adhesive surface of the carrier film may not have adhesiveness to a portion of the glass ribbon disposed adjacent to the non-adhesive surface so as to contact the non-adhesive surface, and when the non-adhesive surface of the carrier film is in contact with a portion of the glass ribbon, no component of the carrier film may be transferred onto the surface of the glass ribbon when stored at a temperature of 20 °C for more than 5 days under a load of 1.97 gf / mm 2 or more.

[0023] In some embodiments, the adhesive surface of the carrier film may have a peel adhesion force of 2.9 gf / in at a temperature of 20°C to 170°C. 2 It may have the following peel adhesion force.

[0024] In some embodiments, the glass roll is a leader film disposed on the front side of the glass ribbon and attached to the adhesive surface of the carrier film. One end of the leader film is attached to a winding core and overlaps a part of the carrier film in a state of being wound back in a planar shape. It may further include a trailer film disposed on the rear side of the glass ribbon and attached to the adhesive surface of the carrier film.

[0025] These and / or other aspects will become apparent from the following description of the embodiments in conjunction with the accompanying drawings and will be more readily understood.

Brief Description of the Drawings

[0026] [Figure 1] It is a schematic diagram of a glass roll according to some embodiments. [Figure 2] It is a cross-sectional view of the glass roll of FIG. 1 in a wound-back state. [Figure 3] It is an enlarged view of region A of FIG. 1 showing the glass roll in a wound state. [Figure 4] It is an enlarged view of region B of FIG. 2. [Figure 5] It is a cross-sectional view of a part of a glass roll according to some embodiments. [Figure 6] It is a schematic diagram of a roll-to-roll manufacturing apparatus by using a glass roll according to some embodiments. [Figure 7] It is a schematic diagram of an aging test method by using a glass roll according to some embodiments.

Modes for Carrying Out the Invention

[0027] Herein, embodiments are given detailed reference, examples of which are illustrated in the accompanying figures, and similar reference numerals refer to similar elements throughout. In this respect, embodiments may take different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, embodiments are described below only by reference to the figures in order to illustrate the aspects of this specification. As used herein, the term "and / or" includes any and all combinations of one or more of the enumerated items relating to the subject. Expressions such as "at least one of" preceding a list of elements modify the entire list of elements, and not the individual elements of the list.

[0028] Embodiments of the present disclosure are described below in detail with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided to make the present disclosure thorough and complete and to fully convey the concept of the invention to those skilled in the art. Throughout the drawings, similar reference numerals indicate similar elements. Furthermore, various components and areas in the drawings are shown schematically. Thus, the present invention is not limited by the relative sizes or distances depicted in the accompanying drawings.

[0029] Figure 1 is a schematic diagram of a glass roll 1 according to several embodiments. Figure 2 is a cross-sectional view of the glass roll 1 of Figure 1 in the unwinding state. Figure 3 is an enlarged view of region A of Figure 1, showing the glass roll 1 in the wound state.

[0030] Referring to Figures 1 to 3, the glass roll 1 may include a winding core 10, a stack body of carrier film 20, and a glass ribbon 30 wound on the winding core 10.

[0031] The winding core 10 may have a cylindrical outer surface 10s, and the stack body of the carrier film 20 and glass ribbon 30 may be wound on the outer surface 10s of the winding core 10. The stack body of the carrier film 20 and glass ribbon 30 wound around the winding core 10 may be configured to be continuously unwound from the winding core 10 through a roll-to-roll process, for example, in the release direction DX. The winding core 10 may have a hollow or hollow cylindrical shape, or in other embodiments, the winding core 10 may have a filled or solid cylindrical shape. In some embodiments, the diameter of the winding core 10 may be about 6 inches or more, but this disclosure is not limited thereto.

[0032] The carrier film 20 may include an adhesive surface 20_A and a non-adhesive surface 20_B, and the glass ribbon 30 may be attached to the adhesive surface 20_A of the carrier film 20. The carrier film 20 may be attached to the glass ribbon 30 over its entire surface area.

[0033] If the glass ribbon 30 is unwound from the winding core 10 in a roll-to-roll process, and device manufacturing processes such as deposition, coating, and cleaning processes are applied to the surface of the glass ribbon 30, the carrier film 20 can be used as a carrier to support the glass ribbon 30. Furthermore, if the glass ribbon 30 is transported or delivered by being wound in the form of a glass roll, the carrier film 20 can function as a buffer material to prevent expansion and contraction of the glass ribbon 30. Expansion and contraction refers to the phenomenon where a portion of the glass roll (e.g., the winding core 10 and the inner portion of the glass roll 1 wound in close proximity to the winding core 10) slides laterally along the central axis AX, causing the winding core 10 and a portion of the glass ribbon 30 to expand laterally from the glass roll 1.

[0034] In some embodiments, the carrier film 20 has a density of 2.9 gf / in 2 The following peel adhesion strengths may be present. For example, carrier film 20 may have a peel adhesion strength of 2.9 gf / in. 2The following peel adhesion strength: 2.7 gf / in 2 The following peel adhesion strength: 2.5 gf / in 2 The following peel adhesion strength: 2.3 gf / in 2 The following peel adhesion strength: 2.1 gf / in 2 The following peel adhesion strength: 1.9 gf / in 2 The following peel adhesion strength: 1.7 gf / in 2 The following peel adhesion strength: 1.5 gf / in 2 The following peel adhesion strength: 1.3 gf / in 2 The following peel adhesion strength: 1.1 gf / in 2 The following peel adhesion strengths, or 1.0 gf / in 2 The following peel adhesion strengths may be present. In some embodiments, the carrier film 20 has a peel adhesion strength of 1.1 gf / in. 2 It may have the following peel-adhesion strength.

[0035] In some embodiments, the carrier film 20 has a temperature of 20°C to 170°C and a density of 2.9 gf / in. 2 The following peel adhesion strengths may be observed. For example, the carrier film 20 contains a material with excellent thermal stability, and for example, under a temperature range of 20°C to 170°C, it may have a peel adhesion strength of 2.9 gf / in. 2 The following peel-adhesion strength is achieved. Therefore, even when a device manufacturing process carried out at a relatively high temperature is applied to the stack body of the carrier film 20 and glass ribbon 30, for example, when the carrier film 20 is exposed to high temperatures for several minutes to several days, the carrier film 20 can maintain stable peel-adhesion characteristics.

[0036] After the carrier film 20 is exposed to high temperatures, and after a device manufacturing process such as a vacuum-based deposition or coating process and a cleaning process is applied to the glass ribbon 30, the concentration reaches 2.9 gf / in. 2 If the peel-adhesion strength is greater than that, the carrier film 20 may not be easily separated or removed from the glass ribbon 30 during the process of removing the carrier film 20 from the glass ribbon 30. In this case, the electrical or optical performance of the device manufactured on the glass ribbon 30 may be adversely affected.

[0037] In some embodiments, the carrier film 20 has a density of 0.0 gf / in. 2 A greater peel adhesion strength than, for example, 0.1 gf / in 2 Greater peel adhesion than 0.3 gf / in 2 Greater peel adhesion than 0.5 gf / in 2 A peel adhesion strength greater than or equal to 0.7 gf / in 2 It may have greater peel-adhesion strength. For example, if the carrier film 20 does not have peel-adhesion strength, and a device manufacturing process such as a vacuum-based deposition or coating process and a cleaning process is applied to the glass ribbon 30, it may be difficult to stably support the glass ribbon 30 on the carrier film 20.

[0038] In some embodiments, the carrier film 20 may have an elastic modulus of 250 MPa to 15 GPa. In some embodiments, the carrier film 20 may have an elastic modulus of 250 MPa to 1 GPa. In some embodiments, the carrier film 20 may have an elastic modulus of 1 GPa to 15 GPa. In some embodiments, the carrier film 20 may have an elastic modulus in any one of the following ranges: 250 MPa to 2 GPa, 250 MPa to 5 GPa, 250 MPa to 10 GPa, 350 MPa to 1 GPa, 350 MPa to 2 GPa, 350 MPa to 5 GPa, 350 MPa to 10 GPa, 350 MPa to 15 GPa, 500 MPa to 1 GPa, 500 MPa to 2 GPa, 500 MPa to 5 GPa, 500 MPa to 10 GPa, 500 MPa to 15 GPa, 1 GPa to 2 GPa, 1 GPa to 3 GPa, 1 GPa to 5 GPa, 1 GPa to 10 GPa, 2 GPa to 5 GPa, 2 GPa to 10 GPa, 2 GPa to 15 GPa, 3 GPa to 5 GPa, 3 GPa to 10 GPa, and 3 GPa to 15 GPa.

[0039] In some embodiments, since the carrier film 20 has an elastic modulus of 250 MPa to 15 GPa, when mechanical shock or vacuum is applied to the stack body of the carrier film 20 and glass ribbon 30 being transported or carried by being wound on the winding core 10, the carrier film 20 provides a buffering force to the glass ribbon 30 so that expansion and contraction phenomena can be prevented or reduced.

[0040] In some embodiments, the carrier film 20 may have a roughness of 30 nm or less. For example, the carrier film 20 may have a roughness of 30 nm or less, 25 nm or less, 20 nm or less, 15 nm or less, 10 nm or less, 5 nm or less, or 3 nm or less. Because the carrier film 20 has a roughness of 30 nm or less, the glass ribbon 30 can be mounted on the carrier film 20 which forms a stable interface, and the surface morphology of the carrier film 20 can prevent local stress from being applied to the glass ribbon 30.

[0041] In some embodiments, the carrier film 20 may have a thickness of 10 to 200 micrometers. If the thickness of the carrier film 20 is less than 10 micrometers, it may be difficult to provide sufficient rigidity to support the glass ribbon 30 in a roll-to-roll process and / or in a device manufacturing process carried out at relatively high temperatures. If the thickness of the carrier film 20 is greater than 200 micrometers, the volume occupied by the carrier film 20 in the glass roll 1 increases so that the length of the glass ribbon 30 can be reduced. Therefore, when the thickness of the carrier film 20 is in the range of 10 to 200 micrometers, sufficient rigidity is provided to support the glass ribbon 30, and at the same time, a glass ribbon 30 with a relatively long length can be accommodated in the glass roll 1.

[0042] The glass ribbon 30 can be attached to the adhesive surface 20_A of the carrier film 20. The glass ribbon 30 may include, for example, silicate glass, borosilicate glass, aluminosilicate glass, boroaluminosilicate glass, or a combination thereof, each of which may or may not contain alkali elements. The glass ribbon 30 may be, for example, Willow® glass, which is available from Corning Incorporated.

[0043] In some embodiments, the thickness of the glass ribbon 30 may be in the range of about 10 to 100 micrometers. In some embodiments, the thickness of the glass ribbon 30 may have a range of about 10 to 40 micrometers, about 10 to 50 micrometers, about 10 to 60 micrometers, about 10 to 80 micrometers, about 20 to 40 micrometers, about 20 to 50 micrometers, about 20 to 60 micrometers, about 30 to 50 micrometers, about 30 to 60 micrometers, about 30 to 80 micrometers, about 40 to 60 micrometers, about 40 to 80 micrometers, about 50 to 80 micrometers, about 50 to 100 micrometers, about 60 to 80 micrometers, or about 60 to 100 micrometers.

[0044] In some embodiments, if the thickness of the glass ribbon 30 is less than 10 micrometers, it may be difficult to handle the glass ribbon 30 in a roll-to-roll process and / or a device manufacturing process that is performed at relatively high temperatures, and if the thickness of the glass ribbon 30 is greater than 100 micrometers, it may be difficult to wind the glass ribbon 30 onto the winding core 10.

[0045] In some embodiments, the glass ribbon 30 may have a length of 10 to 200 meters when unwound in the release direction DX. An appropriate value for the length of the glass ribbon 30 can be selected by reflecting the manufacturing process applied to the glass ribbon 30. In some embodiments, the thickness of the glass ribbon 30 may be greater than the thickness of the carrier film 20, and the stack body of the carrier film 20 and the glass ribbon 30 may be wound on the winding core 10 for a relatively long length.

[0046] The stack body of the carrier film 20 and glass ribbon 30 can be stored or transported by winding it on the outer surface 10s of the winding core 10, i.e., in the form of a glass roll 1. As illustrated in Figure 3, while the glass roll 1 is in a wound state, a portion of the glass ribbon 30 is attached to the adhesive surface 20_A of the carrier film 20, forming a stack ST of the carrier film 20 and glass ribbon 30, and the non-adhesive surface 20_B of the carrier film 20 may be positioned in contact with a portion P1 of the glass ribbon 30 adjacent to the non-adhesive surface 20_B. Even if the non-adhesive surface 20_B of the carrier film 20 is in contact with a portion P1 of the glass ribbon 30 adjacent to the non-adhesive surface 20_B, the non-adhesive surface 20_B of the carrier film 20 may not adhere to the portion P1 of the glass ribbon 30.

[0047] For example, if the non-adhesive surface 20_B of the carrier film 20 and portion P1 of the glass ribbon 30 are in contact with each other, and the humidity is 1.97 gf / mm² at a temperature of 20°C 2 If stored under this load for more than 5 days, the non-adhesive surface 20_B of the carrier film 20 may not adhere to portion P1 of the glass ribbon 30. When the glass roll 1 is in a wound state, or when the non-adhesive surface 20_B of the carrier film 20 and portion P1 of the glass ribbon 30 are in contact with each other, and the load is 1.97 gf / mm² at a temperature of 20°C. 2If stored under load for more than 5 days, it can be confirmed that no portion of the carrier film 20 remains by separating the non-adhesive surface 20_B of the carrier film 20 from portion P1 of the glass ribbon 30 and observing the surface of portion P1 of the glass ribbon 30 with the naked eye or by analyzing the composition of the organic material.

[0048] A leader film 40 may be attached to the first end of the stack body of the carrier film 20 and glass ribbon 30, and a trailer film 50 may be attached to the second end of the stack body of the carrier film 20 and glass ribbon 30. The leader film 40 and the trailer film 50 may be attached to the adhesive surface 20_A of the carrier film 20. For example, the leader film 40 may be in close contact with the front end 30_F of the glass ribbon 30, and the trailer film 50 may be in close contact with the rear end 30_R of the glass ribbon 30. The stack body of the carrier film 20 and glass ribbon 30 may be connected to a winding core 10 via the trailer film 50 and arranged to be wound on the outer surface 10s of the winding core 10.

[0049] The rear end 30_R of the glass ribbon 30 may refer to the end of the glass ribbon 30 that is positioned adjacent to the winding core 10, and the front end 30_F of the glass ribbon 30 may refer to the end of the glass ribbon 30 that is positioned further away from the winding core 10. For example, when the stack body of the carrier film 20 and the glass ribbon 30 is unwound from the glass roll 1, the front end 30_F of the glass ribbon 30 may be unwound first in a planar shape, and then the rear end 30_R of the glass ribbon 30 may be unwound finally in a planar shape. The trailer film 50 can prevent damage to the glass ribbon 30 during the process in which the stack body of the carrier film 20 and the glass ribbon 30 is wound onto the winding core 10, and the leader film 40 can prevent damage to the glass ribbon 30 during the process in which the stack body of the carrier film 20 and the glass ribbon 30 is unwound from the state of the glass roll 1.

[0050] In some embodiments, the leader film 40 and the trailer film 50 may include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or a combination thereof.

[0051] In some embodiments, the leader film 40 may be omitted, and the end of the carrier film 20 (for example, the end of the adhesive surface 20_A of the carrier film 20) may be directly attached to the outer surface 10s of the winding core 10. In this case, the front end 30_F of the glass ribbon 30 and the end of the carrier film 20 are located relatively far apart from each other, so the glass ribbon 30 may not be in direct contact with the outer surface 10s of the winding core 10.

[0052] Figure 4 is an enlarged view of region B in Figure 2.

[0053] Referring to Figure 4, the carrier film 20 may have a double-layer structure. In some embodiments, the carrier film 20 may include a base film 22 and an adhesive layer 24 attached to a first surface of the base film 22. The surface of the adhesive layer 24, for example, the surface of the adhesive layer 24 opposite to the surface of the adhesive layer 24 that is in contact with the first surface of the base film 22, may form the adhesive surface 20_A of the carrier film 20.

[0054] In some embodiments, the base film 22 may comprise at least one of polypropylene and polyethylene. In some embodiments, the base film 22 may comprise atactic polypropylene. The first and second surfaces of the base film 22 may be non-adhesive, and the second surface of the base film 22 may form the non-adhesive surface 20_B of the carrier film 20.

[0055] In some embodiments, the adhesive layer 24 may comprise at least one of a polyolefin plastomer, an alpha-olefin copolymer, a silicone resin, and a photoreactive adhesive material. In some embodiments, the adhesive layer 24 may be formed uniformly and relatively thinly on the first surface of the base film 22. For example, the thickness of the adhesive layer 24 may correspond to 10% to 50% of the thickness of the carrier film 20.

[0056] The adhesive layer 24 forms a stable interface over the entire area of ​​the base film 22 and can cover the first surface of the base film 22. Therefore, cosmetic defects such as bubbles, foam, wrinkles, or bumps may not occur between the adhesive layer 24 and the first surface of the base film 22.

[0057] In some embodiments, the base film 22, together with the adhesive layer 24, can provide the required modulus or roughness for the carrier film 20, and the adhesive layer 24 is mounted on the base film 22 to exhibit stable peel adhesion to the glass ribbon 30. For example, the adhesive layer 24 can maintain a stable peel adhesion of 2.9 gf / in even at relatively high temperatures. 2 It may have the following peel-adhesion strength.

[0058] In some embodiments, the carrier film 20 may be provided with a liner (not shown) further attached to the adhesive layer 24, and in the process of attaching the glass ribbon 30 to the carrier film 20, the liner may be removed, and the glass ribbon 30 may be attached to the adhesive surface 20_A of the carrier film 20 (for example, the surface of the adhesive layer 24 exposed after the liner has been removed).

[0059] Figure 5 is a cross-sectional view of a portion of the glass roll 1a according to several embodiments.

[0060] Referring to Figure 5, the carrier film 20a may have a triple-layer structure. In some embodiments, the carrier film 20a may include a base film 22, an adhesive layer 24 attached to a first surface of the base film 22, and a non-adhesive layer 26 attached to a second surface of the base film 22. The surface of the adhesive layer 24, for example, the surface of the adhesive layer 24 opposite to the surface of the adhesive layer 24 that is in contact with the first surface of the base film 22, may form the adhesive surface 20_A of the carrier film 20, and the surface of the non-adhesive layer 26, for example, the surface of the non-adhesive layer 26 opposite to the surface of the non-adhesive layer 26 that is in contact with the second surface of the base film 22, may form the non-adhesive surface 20_B of the carrier film 20.

[0061] In some embodiments, the base film 22 may comprise at least one of polypropylene and polyethylene. In some embodiments, the base film 22 may comprise atactic polypropylene. The first and second surfaces of the base film 22 may be non-adhesive, and the second surface of the base film 22 may form the non-adhesive surface 20_B of the carrier film 20.

[0062] In some embodiments, the adhesive layer 24 may comprise at least one of a polyolefin plastomer, an alpha-olefin copolymer, a silicone resin, and a photoreactive adhesive material. In some embodiments, the adhesive layer 24 may be formed uniformly and relatively thinly on the first surface of the base film 22. For example, the thickness of the adhesive layer 24 may correspond to 10% to 50% of the thickness of the carrier film 20.

[0063] In some embodiments, the non-adhesive layer 26 may include at least one of atactic polypropylene and polyethylene.

[0064] The adhesive layer 24 forms a stable interface over the entire area of ​​the base film 22 and can cover the first surface of the base film 22. Therefore, cosmetic defects such as bubbles, foam, wrinkles, or bulges may not occur between the adhesive layer 24 and the first surface of the base film 22. Furthermore, the non-adhesive layer 26 forms a stable interface over the entire area of ​​the base film 22 and can cover the second surface of the base film 22. Therefore, cosmetic defects such as bubbles, foam, wrinkles, or bulges may not occur between the non-adhesive layer 26 and the second surface of the base film 22.

[0065] Figure 6 is a schematic diagram of a roll-to-roll manufacturing apparatus 100 using glass rolls, according to several embodiments.

[0066] Referring to Figure 6, the roll-to-roll manufacturing apparatus 100 may be an apparatus for performing a roll-to-roll manufacturing method using a glass roll 1, according to several embodiments described with reference to Figures 1 to 5, for example, an apparatus for forming an electronic device on a glass ribbon 30 wound around the glass roll 1. In some embodiments, the roll-to-roll manufacturing apparatus 100 may be integrated into an apparatus for manufacturing devices such as solar cells, smart glass, or display devices.

[0067] A roll-to-roll manufacturing method using the roll-to-roll manufacturing apparatus 100 may include a plurality of material layer forming units 120-160 for coating, depositing, or printing metal layers, semiconductor layers, transparent electrode layers, inorganic material layers, organic material layers, etc., onto a glass ribbon 30 to form components of devices such as solar cells, smart glass, or display devices. In some embodiments, at least one of the material layer forming units 120-160 for coating, depositing, or printing metal layers, semiconductor layers, transparent electrode layers, inorganic material layers, organic material layers, etc., may be operated at a relatively high temperature, for example, 20°C to 170°C.

[0068] In some embodiments, the glass roll 1 may be mounted on a rewinding device 110 and configured to be unwound from the rewinding device 110 in a roll-to-roll manner. The glass stack GS may be configured to pass sequentially through a first material layer forming unit 120, a second material layer forming unit 130, a third material layer forming unit 140, a fourth material layer forming unit 150, and a fifth material layer forming unit 160. After passing sequentially through the first to fifth material layer forming units 120 to 160, the glass stack GS may be wound via a winding device 170 to become the glass roll 1 again.

[0069] In some embodiments, any one of the first to fifth material layer forming units 120 to 160 may be configured to form a metal layer, semiconductor layer, transparent electrode layer, inorganic material layer, organic material layer, etc., on the glass stack GS by a printing method; any one of the multiple first to fifth material layer forming units 120 to 160 may be configured to form a metal layer, semiconductor layer, transparent electrode layer, inorganic material layer, organic material layer, etc., on the glass stack GS by a dry deposition method; and any one of the first to fifth material layer forming units 120 to 160 may be configured to form a metal layer, semiconductor layer, transparent electrode layer, inorganic material layer, organic material layer, etc., on the glass stack GS by a coating method.

[0070] In some embodiments, the glass stack GS has a structure in which a glass ribbon 30 (see Figure 2) is mounted on a carrier film 20 (see Figure 2), and may have moderate flexibility to pass sequentially through first to fifth material layer forming units 120 to 160 by a roll-to-roll process. Furthermore, the carrier film 20 may have sufficient mechanical rigidity to prevent damage to the glass ribbon 30 when passing sequentially through first to fifth material layer forming units 120 to 160 by a roll-to-roll process.

[0071] In some embodiments, one of the first to fifth material layering units 120 to 160 may be a vacuum-based manufacturing apparatus and may have a relatively high temperature. When passing through a vacuum-based and / or relatively high-temperature material layering unit, in the glass stack GS, the organic material may not evaporate from or separate from the carrier film 20, at a rate of approximately 2.9 gf / in 2 It may have the following peel adhesion strength: 2.9 gf / in after exposure to high temperature. 2 The carrier film 20 having the following peel-adhesion strength can be easily separated or removed from the glass ribbon 30 after a device manufacturing process, such as a vacuum-based deposition or coating process or a cleaning process, has been applied to the glass ribbon 30.

[0072] Experimental example Table 1 below shows several embodiments of accelerated testing methods using glass rolls. [Table 1]

[0073] Referring to Table 1, Accelerated Environment Test 1 tests the suitability of a glass stack, in which a glass ribbon is mounted on a carrier film, to the high-temperature conditions of a device manufacturing process, in which it sequentially passes through stages 1 to 5, each having different temperature conditions. No cracks, bubbles, or visual changes are observed in the glass stack after passing Accelerated Environment Test 1. Accelerated Environment Test 2 is a high-temperature storage test in which no cracks, bubbles, or visual changes are observed in the glass stack after it has been stored for 7 days under conditions of 85°C and 85% RH.

[0074] The impact absorption test was conducted in accordance with the ASTM D4169 standard, and no damage to the glass roll was observed after the impact absorption test. Furthermore, the peel adhesion strength of the carrier film to the glass ribbon was 1.1 gf / in. 2The following was measured. Furthermore, the edge strength and surface strength of the glass ribbon were 150 MPa and 500 MPa, respectively, confirming that the glass ribbon has sufficient strength.

[0075] Figure 7 is a schematic diagram of an aging test method using a glass roll, according to several embodiments.

[0076] Referring to Figure 7, the glass sheet stack body GS_e includes multiple carrier films 20 and multiple glass ribbons 30 that are stacked sequentially on top of each other. For example, the carrier films 20 were prepared to a size of 100 mm * 100 mm, and the glass ribbons 30 were prepared to a size of 150 mm * 150 mm. The glass sheet stack body GS_e was placed in a clean room, and 19.7 kg or 1.97 gf / mm² of load was applied to the glass sheet stack body GS_e via a load plate LDP. 2 A load was applied. After storing the loaded glass sheet stack body GS_e in a cleanroom for 5 days, the glass sheet stack body GS_e was disassembled, and whether any organic material remained on the surface of the glass ribbon 30 was measured visually and by pyrolysis gas chromatography / mass chromatography (pyrolysis GC / MS) analysis. The aging test results confirmed that no residue of organic material remained on the glass ribbon 30.

[0077] It should be understood that the embodiments described herein are for illustrative purposes only and not for limiting purposes. Descriptions of features or aspects within each embodiment should typically be considered applicable to other similar features or aspects in other embodiments.

[0078] While one or more embodiments have been described with reference to the drawings, it will be understood by those skilled in the art that various modifications in form and detail can be made therein without departing from the spirit and scope of the disclosure as defined by the following claims.

Claims

1. It is a glass roll, A wound core having a central axis, A carrier film wound around the central axis on the winding core, The carrier film comprises a glass ribbon wound around the central axis and attached to the carrier film, The carrier film includes an adhesive surface in contact with the glass ribbon and a non-adhesive surface opposite to the adhesive surface. The carrier film has a density of 2.9 gf / in. ２ Glass rolls with the following peel-and-adhesion strengths.

2. The glass roll according to claim 1, wherein the carrier film has an elastic modulus of 250 MPa to 15 GPa.

3. The glass ribbon has a thickness of 10 micrometers to 100 micrometers. The glass roll according to claim 1 or 2, wherein the carrier film has a thickness of 10 micrometers to 200 micrometers.

4. The glass roll according to any one of claims 1 to 3, wherein the carrier film has a roughness of about 30 nm or less.

5. The carrier film has a density of 1.1 gf / in. ２ A glass roll according to any one of claims 1 to 4, having the following peel-adhesion strength.

6. The aforementioned carrier film is A base film including a first surface and a second surface, The base film comprises an adhesive layer attached to the first surface of the base film, The glass roll according to any one of claims 1 to 5, wherein the surface of the adhesive layer defines the adhesive surface of the carrier film.

7. The carrier film further includes a non-adhesive layer attached to the second surface of the base film, The glass roll according to claim 6, wherein the surface of the non-adhesive layer defines the non-adhesive surface of the carrier film.

8. The glass roll according to claim 6 or 7, wherein the second surface of the base film defines the non-adhesive surface of the carrier film.

9. The base film comprises at least one of polypropylene and polyethylene. The glass roll according to any one of claims 6 to 8, wherein the adhesive layer comprises at least one of a polyolefin plastomer, an alpha-olefin copolymer, a silicone resin, and a photoreactive adhesive material.

10. The non-adhesive surface of the carrier film does not have adhesive force to a portion of the glass ribbon that is positioned adjacent to the non-adhesive surface so as to be in contact with the non-adhesive surface. With the non-adhesive surface of the carrier film in contact with the portion of the glass ribbon, the reading is 1.97 gf / mm². ２ The glass roll according to any one of claims 1 to 9, wherein when stored at a temperature of 20°C for more than 5 days under the load, none of the components of the carrier film are transferred to the surface of the glass ribbon.

11. The adhesive surface of the carrier film exhibits a load of 2.9 gf / in at temperatures between 20°C and 170°C. ２ A glass roll according to any one of claims 1 to 10, having the following peel-adhesion strength.

12. It is a glass roll, A wound core having a central axis, A carrier film wound around the central axis on the winding core, The carrier film comprises a glass ribbon wound around the central axis and attached to the carrier film, The aforementioned carrier film is A base film comprising a first surface and a second surface opposite to the first surface, The base film comprises an adhesive layer attached to the first surface, The carrier film includes an adhesive surface and a non-adhesive surface opposite to the adhesive surface, the second surface of the base film defines the non-adhesive surface, and the carrier film is attached to the glass ribbon such that the adhesive layer is in contact with the glass ribbon. The carrier film has a density of 2.9 gf / in. ２ Glass rolls with the following peel-and-adhesion strengths.

13. The carrier film has an elastic modulus of 250 MPa to 15 GPa. The glass roll according to claim 12, wherein the glass ribbon has a thickness of 10 micrometers to 100 micrometers.

14. The glass roll according to claim 12 or 13, wherein the carrier film has a roughness of 30 nm or less.

15. The carrier film has a density of 1.1 gf / in. ２ A glass roll according to any one of claims 12 to 14, having the following peel-adhesion strength.

16. It is a glass roll, A wound core having a central axis, A carrier film wound around the central axis on the winding core, The carrier film comprises a glass ribbon wound around the central axis and attached to the carrier film, The carrier film includes an adhesive surface and a non-adhesive surface opposite to the adhesive surface. The carrier film has a density of 2.9 gf / in. ２ A glass roll comprising the following peel adhesion strength and elastic modulus in the range of 250 MPa to 15 GPa.

17. The base film comprises at least one of polypropylene and polyethylene. The glass roll according to claim 16, wherein the adhesive layer comprises at least one of a polyolefin plastomer, an alpha-olefin copolymer, a silicone resin, and a photoreactive adhesive material.

18. The non-adhesive surface of the carrier film does not have adhesive force to a portion of the glass ribbon that is positioned adjacent to the non-adhesive surface so as to be in contact with the non-adhesive surface. With the non-adhesive surface of the carrier film in contact with the portion of the glass ribbon, the reading is 1.97 gf / mm². ２ The glass roll according to claim 16 or 17, wherein when stored at a temperature of 20°C for more than 5 days under the load, none of the components of the carrier film are transferred to the surface of the glass ribbon.

19. The adhesive surface of the carrier film has a peel adhesion force of 2.9 gf / in at a temperature of 20°C to 170°C ２ The glass roll according to any one of claims 16 to 18, having the following peel adhesion force

20. A leader film positioned in front of the glass ribbon and attached to the adhesive surface of the carrier film, wherein one end of the leader film is attached to the winding core and overlaps with a portion of the carrier film when unwound in a planar shape; The glass roll according to any one of claims 16 to 19, further comprising: a trailer film disposed on the rear side of the glass ribbon and attached to the adhesive surface of the carrier film.

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