Method for manufacturing glass interleaving paper roll

Abstract

The invention provides a manufacturing method of a glass lining paper roll, which can reduce particles from a glass lining paper main body and manufacturing equipment so as to prevent the glass surface from being damaged. The manufacturing method of the glass interleaving paper comprises the following procedures (1) to (5): (1) a forming net procedure, (2) a squeezing procedure, (3) a drying procedure, (4) a calendaring procedure and (5) a rolling procedure. In the calendering step, the longitudinal elastic modulus of the surface material of each of the pair of rollers is 150 GPa or more, and the linear pressure thereof is 10000 N / m or more. In addition, in a prescribed dusting test, the amount of particles of 0.3 [mu] m to 10 [mu] m is 20 or less. According to the mode, particles from the glass interleaving paper main body can be reduced, even under the condition that electric wiring and the like are formed on the surface of the plate-shaped glass, the generation of defects such as broken lines can be inhibited, and the cleanliness of a clean room can be easily maintained.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a glass liner roll. More specifically, this invention relates to a method for manufacturing a glass liner roll that reduces particles from the glass liner body or manufacturing equipment. Background Technology

[0002] Glass liner is used to sandwich between sheet glass panels during the conveying of various types of sheet glass, such as architectural glass panels, automotive glass panels, plasma display panels, and liquid crystal display panels. In these sheet glass panels, especially those used in flat panel displays such as liquid crystal displays, the formation of fine electrical wiring, electrodes, circuits, and partitions on their surfaces means that even minor surface damage or contamination can lead to defects such as broken lines. More specifically, the size and number of problematic damages in these flat panel display sheet glass panels are very high, and correspondingly, the glass liner requires a corresponding level of quality. To prevent damage, especially in flat panel display sheet glass, it is necessary to reduce the amount of sand, rust, and other contaminants contained in the glass liner to a suitable level.

[0003] Patent Document 1 discloses a glass backing paper for sheet glass used in flat panel displays and a method for manufacturing the glass backing paper. Patent Document 1 uses the term "stationary foreign matter," which is measured after vigorous cleaning with a roller brush. Furthermore, in this specification, substances that cannot be completely removed even with vigorous cleaning are sometimes referred to as "contamination." Existing technical documents Patent documents

[0004] Patent Document 1: Japanese Patent Application Publication No. 2017-226479 Summary of the Invention The problem that the invention aims to solve

[0005] However, the process of forming electrical wiring and the like on the surface of the sheet glass used in flat panel displays is carried out in a cleanroom. Therefore, the properties required for the glass backing paper are not limited to reducing "contamination" remaining after intensive cleaning, as described above. It is also necessary to consider the property of reducing "particles" adhering to the surface of the glass backing paper. In recent years, as the line width of electrical wiring and the like has become thinner, and the process of forming electrical wiring and the like is carried out in a cleanroom with high cleanliness, there is a problem that relying solely on the properties related to "stationary foreign matter," i.e., "contamination," as described in Patent Document 1 may result in the glass backing paper being unqualified for flat panel displays.

[0006] In view of the above, the object of the present invention is to provide a method for manufacturing a glass liner roll that can suppress damage to the glass surface by reducing particles from the glass liner body and the manufacturing equipment. Methods for solving problems

[0007] The manufacturing method of the glass liner paper roll of the first invention is characterized by comprising the following steps (1) to (5): (1) forming wire step, in which pulp slurry is placed on a forming wire for papermaking, and the water content of the pulp slurry is removed to form wet paper; (2) pressing step, in which the wet paper is formed into pressed wet paper; (3) drying step, in which the pressed wet paper is formed into dried paper; (4) calendering step, in which the dried paper is formed into glass liner paper; and (5) winding step, in which the glass liner paper is wound onto a paper tube of a predetermined configuration to form a glass liner paper roll, wherein in the calendering step, the dried paper is clamped by at least one pair of rollers and processed into the glass liner paper, wherein the longitudinal elastic modulus of the material on the surface of the pair of rollers is 150 GPa or more, the linear pressure between the pair of rollers is 10000 N / m or more, and in the dust generation test of the glass liner paper constituting the glass liner paper roll, the number of particles with a size of 0.3 μm or more and a size of 10 μm or less is 20 or less. The second invention's method for manufacturing glass liner paper rolls is characterized in that, in the first invention, a metal end-protecting material is provided at the end of the paper tube used in the winding process. The third invention's method for manufacturing glass liner paper rolls is characterized in that, in the first invention, during the forming wire process, the forming wire that receives the pulp slurry consists of only one layer, and the basis weight of the glass liner paper is 20 g / m². 2 Above and 80g / m 2 the following. The method for manufacturing the glass liner roll of the fourth invention is characterized in that, in the first invention, there are no connecting portions in the glass liner roll that connect the glass liners to each other. The fifth invention is characterized in that, in the first invention, the degree of dissociation of the pulp is less than 600 ml. The effects of the invention

[0008] According to the first invention, the longitudinal elastic modulus of the material on the surface of at least one pair of rollers in the calendering process is 150 GPa or more, the linear pressure between the rollers is 10000 N / m, and the number of particles of a predetermined size in the specified dust generation test is 20 or less. This reduces particles from the glass liner paper body, thereby suppressing damage to the glass surface. Moreover, even when electrical wiring or the like forms on the surface of the sheet glass, defects such as broken wires can be suppressed, and the cleanliness of the cleanroom can be easily maintained. According to the second invention, a metal end protection material is provided at the end of the paper tube used for the product in the winding process, thereby suppressing the generation of particles from the paper tube during the manufacturing process of the glass liner paper roll, that is, suppressing the generation of particles from the manufacturing equipment, thereby further suppressing damage to the glass surface. According to the third invention, the forming wire that receives the pulp in the forming wire process consists of only one layer, and the basis weight of the glass liner is 20 g / m². 2 Above and 80g / m 2 Therefore, during the calendering process, it becomes easier to break up foreign objects contained in the drying paper, so that the foreign objects will not damage the glass surface, thus further suppressing damage to the glass surface. According to the fourth invention, since there are no connecting portions that connect the glass liner sheets to each other in the glass liner roll, particles generated from these connecting portions can be eliminated, thereby further suppressing damage to the glass surface. According to the fifth invention, the degree of dissociation of the pulp is less than 600 ml, which can increase the entanglement of the pulp and further suppress the amount of particles generated. Attached Figure Description

[0009] Figure 1 This is a schematic diagram illustrating the structure of the calendering section in a method for manufacturing a glass liner roll that constitutes an embodiment of the present invention. Figure 2 This is a schematic diagram illustrating the process of manufacturing a glass liner roll according to an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating the structure of the winding section in a method for manufacturing a glass liner roll that constitutes an embodiment of the present invention. Figure 4 Is Figure 3 A three-dimensional view of the paper tubes used in the winding section. Figure 5 Is Figure 3 A front view of the paper tube used in the winding section. Figure 5 (A) is a front view showing a partial cross-sectional view of the assembled paper tube body, including the end protection material. Figure 5 (B) is a front view showing a partial cross-sectional view of the paper tube body in a separated state, including the end protective material. Detailed Implementation

[0010] Next, embodiments of the present invention will be described based on the accompanying drawings. However, the embodiments shown below are illustrative of a method for manufacturing a glass paper roll to embody the technical concept of the present invention, and the present invention does not specify the method for manufacturing the glass paper roll as described below. Furthermore, unless otherwise stated, the dimensions, materials, shapes, and relative arrangements of the constituent components described in the embodiments are merely illustrative examples and are not intended to limit the scope of the present invention to these methods. In addition, the size or positional relationships of the components shown in the accompanying drawings are sometimes exaggerated for clarity.

[0011] <Implementation Method> (Glass backing paper 15e) The glass liner 15e manufactured by the glass liner roll manufacturing method of the present invention preferably has a thickness of 0.1 mm or less. This allows for a longer length of glass liner 15e to be obtained from a single glass liner roll 26, which is preferred from a logistical point of view. Furthermore, when forming a glass sheet package by alternating layers of glass sheets and glass liner 15e, more glass sheets can be stacked on a pallet, which is also preferred. The thickness of the glass liner 15e is more preferably 0.09 mm or less, further preferably 0.08 mm or less, and even more preferably 0.07 mm or less. Moreover, the lower limit of the thickness of the glass liner 15e is not particularly limited, for example, it is 0.01 mm or more.

[0012] When the glass liner 15e is rectangular, it is preferable that the shorter side is 730 mm or more. This allows it to be inserted between larger glass plates that have been required in recent years. More preferably, it is 100 mm or more, even more preferably 1500 mm or more, and even more preferably 2000 mm or more. In addition, there is no particular limitation on the upper limit of the shorter side of the glass liner 15e, for example, it is 4000 mm or less.

[0013] The basis weight of 15e glassine backing paper is 20 g / m². 2 Above and 80g / m 2 Furthermore, in processes such as laminating glass sheets with thinner and longer short sides to glass liner 15e, higher strength, density, smoothness, water resistance, or moisture resistance are required for glass liner 15e. Therefore, sometimes more or previously unused new additives are added.

[0014] (The main raw material of glassine liner 15e) The glass liner paper 15e manufactured by the glass liner paper manufacturing method of the present invention can use the following main raw materials. For example, chemical pulps such as kraft pulp (KP), sulfite pulp (SP), and alkaline pulp (AP) can be used; semi-chemical pulps such as semi-chemical pulp (SCP) and chemical groundwood pulp (CGP); mechanical pulps such as groundwood pulp (GP), thermomechanical pulp (TMP, BCTMP), and refined groundwood pulp (RGP); non-wood fiber pulps made from mulberry, sesame, hemp, kenaf, etc.; and synthetic pulps can be used as main raw materials. Furthermore, as main raw materials, mixtures of these can be used, or substances containing cellulose can be used as main raw materials.

[0015] In addition, these main raw materials can be waste paper, virgin pulp, or a mixture of waste paper and virgin pulp. Virgin pulp is preferred.

[0016] In the glass liner paper 15e manufactured by the glass liner paper manufacturing method of the present invention, regardless of the type of pulp, it is preferable to use pulp manufactured without the use of silicone-based defoamers as the main raw material, because silicone-based defoamers are the main cause of wiring or electrode defects when transferring to the glass plate.

[0017] In particular, pulp manufactured without the use of defoamers containing polydimethylsiloxane is especially suitable for use as a primary raw material.

[0018] (Additives added to the main ingredients) Starch can be added as an additive. Starch is an adhesive. The main purpose of the adhesive is to bond paper together using a Yankee drying cylinder or similar device. Furthermore, the main components of this adhesive are polyacrylate (AE), styrene-butadiene copolymer rubber (SBR), and starch; however, when the purpose is to suppress particle formation, a predetermined raw material weight ratio of starch is preferred. Here, the raw material weight ratio refers to the weight ratio in the glass liner paper 15e after the calendering process.

[0019] In addition to starch, the following substances may also be added as additives.

[0020] Internal paper strength enhancers can be added as additives. These enhancers are used primarily to improve paper strength. A representative example of a main component is polyacrylamide (PAM).

[0021] As an additive, a resin pitch control agent can be added. Resin pitch control agents are used primarily for the purpose of dispersing or removing resin (a binder from resin or a pharmaceutical agent) from the system. Representative examples of key components include cationic (C-)PAM, polyethyleneimine (PEI), C-acrylic acid and other cationic polymers, surfactants, polyacrylic acid, polyvinyl alcohol (PVA), and PAM.

[0022] Coagulants can also be added as additives. The primary purpose of coagulants is to form small, high-density aggregates of fiber particles. Since pulp and fiber particles are anionic, they are neutralized and coagulated by cationic coagulants. Additionally, it also achieves the effect of fixing anionic adhesive foreign matter to the pulp, preventing roll contamination. Representative examples of main components are polydiallyl dimethyl ammonium chloride (PDADMAC) and PEI.

[0023] As an additive, a dry paper strength enhancer can also be added. Dry paper strength enhancers are used primarily to improve the strength of paper, especially its strength in the dry state. Representative examples of main components include AE, CS, PAM, and PVA.

[0024] As an additive, wetting strength enhancers can also be added. Wetting strength enhancers are used primarily to improve the strength of paper, especially its strength when it is moist. Representative examples of main components include AE, polyamide polyamine epichlorohydrin (PAE), PVA, polyethyleneamine (PVAm), melamine (formaldehyde) resin (MF), urea (formaldehyde) resin (UF), polyvinyl chloride (PVC), and polyvinylidene chloride (PVDC).

[0025] Internal sizing agents can also be added as additives. Internal sizing agents are used primarily to inhibit water permeability, prevent exudation, and enhance water resistance. Representative examples of main components include AE, rosin, PVA, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and carboxymethyl cellulose (CMC).

[0026] Surface sizing agents can also be added as additives. Surface sizing agents are used primarily to inhibit water permeability, prevent exudation, and enhance water resistance. A representative example of a main component is styrene-acrylic acid copolymer (AS).

[0027] Tackifiers can also be added as additives. Tackifiers are used primarily to increase viscosity, ensure uniform dispersion of pulp fibers in water, and prevent sedimentation. Representative examples of key components include AE, PAM, polyethylene oxide (PEO), CMC, and alginate (AA).

[0028] Water-resistant crosslinking agents can also be added as additives. The main purpose of water-resistant crosslinking agents is to improve water resistance and strength through crosslinking. A representative example of a main component is epoxy resin (ER).

[0029] The aforementioned additives are preferably used in appropriate amounts for their respective primary purposes.

[0030] Furthermore, it is particularly preferred that the additive contains a substance that is highly effective for each purpose of the various papermaking agents. That is, it preferably contains at least one substance selected from alginic acid, polyacrylate, alkyl ketone dimer, styrene-acrylic acid copolymer, alkenyl succinic anhydride, epoxy resin, melamine resin, polyamide polyamine epichlorohydrin, polyvinyl chloride, polyvinylidene chloride, styrene-butadiene copolymer rubber, rosin, polyethylene terephthalate, and their derivatives.

[0031] (Manufacturing method of glassine paper roll 26) Figure 2 The diagram shows a flow chart illustrating the manufacturing method of the glass liner paper roll according to this embodiment. The manufacturing process proceeds from left to right on the paper surface. The manufacturing method of the glass liner paper 15e in this embodiment is performed by a single paper machine 10. That is, the single paper machine 10 is formed by multiple parts, and predetermined processes are performed in each part to manufacture the glass liner paper 15e, which is then used to manufacture the glass liner paper roll 26. Furthermore, while it has been stated that the manufacturing method of the glass liner paper 15e in this embodiment is performed by a single paper machine 10, the manufacturing method of the glass liner paper roll of the present invention is not limited to this configuration. For example, it may be implemented by connecting only a few of the multiple parts constituting the manufacturing method of the glass liner paper.

[0032] exist Figure 2 In the paper, the manufactured object flows from left to right. In this specification, sometimes... Figure 2 The left side of the paper is called the upstream side, and the right side is called the downstream side. In all manufacturing processes, the object being manufactured is referred to as paper 15, and for ease of understanding, this designation is changed each time it passes through a process.

[0033] Before reaching the paper machine 10, the user of the paper machine 10 preferably performs the following steps: a preparation step to prepare pulp as raw material when preparing paper raw liquid; and a pulping step to produce pulp 15a from the pulp.

[0034] Furthermore, the pulp 15a used in this embodiment preferably has a degree of dissociation of 600 ml or less. A degree of dissociation of 15a of 600 ml or less increases pulp entanglement and further suppresses the amount of particles generated. When the degree of dissociation is greater than 600 ml, the suppression of particle generation sometimes becomes insufficient. Here, the degree of dissociation refers to the Canadian standard degree of freeness (Canadian standard pulp freeness) measured according to JISP8121-2:2012 using pulp 15a obtained by dissociation according to JIS P 8220-1:2012.

[0035] The user of the paper machine 10 performs the forming wire process in the forming wire section 11 constituting the paper machine 10 to form wet paper 15b from pulp slurry 15a. First, the user of the paper machine 10 supplies pulp slurry 15a to the headbox provided in the forming wire section 11. In the forming wire section 11, pulp slurry 15a is supplied from the headbox in sheet form onto the forming wire provided in the forming wire section 11. More specifically, the forming wire consists of a lower forming wire and an upper forming wire. The pulp slurry 15a supplied to the lower forming wire is then held by the lower forming wire and the upper forming wire, spread to a uniform thickness, and dewatered to become wet paper 15b.

[0036] The lower and upper forming meshes of the forming mesh section 11 are permeable membranes formed into annular strips. Specifically, they are meshes made of plastic or metal materials, or annular bodies made of felt formed of natural or synthetic fibers.

[0037] The lower forming wire and the upper forming wire are mounted on multiple rollers, and the driving force of the motor is transmitted to the drive roller among the multiple rollers, thereby moving around at a predetermined speed. In addition, in this embodiment, the lower forming wire that receives the pulp slurry 15a consists of only one layer.

[0038] In the forming wire process, the lower forming wire that receives the pulp slurry 15a consists of only one layer, and the basis weight of the glass liner 15e is 20 g / m². 2 Above and 80g / m 2 Therefore, in the calendering process, it becomes easier to break up foreign objects contained in the dried paper 15d, so that the foreign objects will not damage the glass surface, thus further suppressing damage to the glass surface.

[0039] The user of the paper machine 10 performs a pressing process in the press section 12 that constitutes the paper machine 10 to turn the wet paper 15b into pressed wet paper 15c.

[0040] The wet paper 15b formed by the forming wire section 11 is conveyed to the pressing section 12, which has a press roll, an annular strip of felt and a pair of press rolls. Here, the wet paper 15b is further dehydrated and pressed at the same time to become pressed wet paper 15c.

[0041] The user of the paper machine 10 performs a drying process in the drying section 13 that constitutes the paper machine 10, and turns the pressed wet paper 15c into dried paper 15d.

[0042] After being pressed by the press section 12, the wet paper 15c is conveyed to the drying section 13, which consists of multiple rollers. During the process of passing through the drying section 13, it is dried, for example, in an atmosphere of about 120°C, to become dried paper 15d.

[0043] The user of the paper machine 10 performs a calendering process in the calendering section 14 that constitutes the paper machine 10 to turn the dried paper 15d into glass liner paper 15e. Figure 1 The diagram shows a schematic representation of the calendering section 14, which constitutes the manufacturing method of the glass liner paper in this embodiment. The dried paper 15d, after being dried by the drying section 13, is conveyed to the calendering section 14 and subjected to calendering processing via clamping and conveying based on calendering rollers, thereby smoothing both sides. Furthermore, the term "calendering rollers" refers to a configuration including a pair of rollers arranged in a manner capable of clamping the dried paper 15d.

[0044] use Figure 1 The calendering section 14 of this embodiment will be described. In this embodiment, two pairs of calendering rollers are used. The upstream calendering roller consists of a first upper roller 20a and a first lower roller 20b. The downstream calendering roller consists of a second upper roller 21a and a second lower roller 21b. In this embodiment, the longitudinal modulus of elasticity of the materials on the surfaces of the first upper roller 20a, the first lower roller 20b, the second upper roller 21a, and the second lower roller 21b is 150 GPa or higher. Specifically, materials with a longitudinal modulus of elasticity of 150 GPa or higher include cast iron, steel, tungsten, etc. "Steel" refers to an iron alloy containing 400 ppm to 2% carbon, such as carbon steel, nickel-chromium steel, and other special steels. Furthermore, the upper limit of the longitudinal modulus of elasticity is preferably set to 400 GPa. By specifying this upper limit, suitable materials can be selected.

[0045] Furthermore, in this embodiment, the longitudinal modulus of elasticity of the materials on the surfaces of the first upper roller 20a, the first lower roller 20b, the second upper roller 21a, and the second lower roller 21b is all set to 150 GPa or higher, but the present invention is not limited thereto. For example, any one of the surfaces of the four rollers may be made of resin or other elastic materials. However, it is necessary to provide at least one pair of calendering rollers, wherein each roller constituting the pair has a specified longitudinal modulus of elasticity.

[0046] Furthermore, in this embodiment, the linear pressure between a pair of rollers with a longitudinal elastic modulus of 150 GPa is 10,000 N / m or more. Through this configuration and implementation, coarse particles contained in the dried paper 15d are broken down. Moreover, the upper limit of the linear pressure is preferably 15,000 N / m or less. This is because, if the upper limit is 15,000 N / m or more, roller deformation may occur. By flattening the surface of the liner paper and strengthening the entanglement of the fibers, the number of particles with a diameter of 0.3 μm or larger and 10 μm or smaller can be reduced to 20 or less in the dust generation test of the glass liner paper 15e. This reduces particles from the main body of the glass liner paper 15e, thereby suppressing damage to the glass surface. Furthermore, even when electrical wiring or the like forms on the surface of the plate glass, defects such as broken wires can be suppressed, and the cleanliness of the cleanroom can be easily maintained. Furthermore, this dust test is based on the tumbling method described in JIS B 9923 (1997), and the tumbling dust tester CW-HDT-102 manufactured by Akatsuchi Manufacturing Co., Ltd. is preferred.

[0047] The paper that has undergone calendering in the calendering section 14 is wound onto the roll 22 as glass backing paper 15e to form a roll-shaped master roll 23, which moves toward the winding section 16.

[0048] Figure 3 The diagram shows a schematic representation of the winding section 16, which constitutes the manufacturing method of the glass liner roll according to this embodiment. After each step of the paper machine 10 used in the manufacturing method of the glass liner roll according to this embodiment is completed, the glass liner 15e is fed from the master roll 23, cut to a predetermined width (cut along the length direction) by the cutter 24, and wound onto the paper tube 25. When the glass liner 15e fed from the master roll 23 reaches a predetermined length, it is cut to a predetermined length (cut along the width direction) by the cutter 24, forming a glass liner roll 26 of predetermined width by winding the long strip of glass liner 15e. The long strip of glass liner 15e wound on the glass liner roll 26 is cut into slices (rectangular) corresponding to the size of the glass plates to be stacked, and sandwiched between the stacked glass plates.

[0049] exist Figure 4 A perspective view of the paper tube 25 used in the winding section 16 is shown. Figure 5 The front view of the paper tube 25 is shown in the figure. Figure 5 (A) is a front view including a partial sectional view of the paper tube 25 in its assembled state. Figure 5 (B) is a front view of a partial sectional view of the components including the paper tube 25 in a separated state.

[0050] In this embodiment, the paper tube 25 is configured to include a paper tube body 25a made of paper and a metal end protection material 25b disposed at the end of the paper tube body 25a. Conventionally, the manufacture of the glass liner roll 26 only uses a paper tube body 25a made of paper, resulting in the leakage of particles from the paper tube body 25a in the final winding section 16. To prevent this leakage, in this embodiment, a metal end protection material 25b is provided at the end of the paper tube 25. This end protection material 25b preferably covers the entire end of the paper tube body 25a. However, even when the entire end is covered, the glass liner 15e comes into contact with the end protection material 25b, and particles may sometimes be generated due to this contact. Therefore, the metal end protection material 25b preferably has an outer diameter slightly smaller than the outermost diameter of the paper tube body 25a. For example, it is preferable that more than 90% of the end of the paper tube body 25a is covered by the end protection material 25b.

[0051] The paper tube 25 used in the winding process is provided with a metal end protection material 25b at its end, which can suppress the generation of particles from the paper tube 25 during the manufacturing process of the glass liner roll 26, i.e., the generation of particles from the manufacturing equipment, thereby further suppressing damage to the glass surface.

[0052] Furthermore, in this embodiment, during the winding process, the connecting portions that link the glass liner sheets 15e together are eliminated when manufacturing the glass liner roll 26. Specifically, the glass liner roll 26 is manufactured from a new mother roll 23 when no glass liner sheet 15e of a predetermined length remains on the mother roll 23. Additionally, if a glass liner sheet 15e breaks during the manufacturing of the glass liner roll 26, it is not connected to the other glass liner sheets; instead, the glass liner roll 26 in the middle of manufacturing is discarded. Therefore, the connecting portions that link the glass liner sheets 15e together can be eliminated from the glass liner roll 26.

[0053] Since there are no connecting parts in the glass liner roll 26 that connect the glass liners 15e to each other, particles generated from these connecting parts can be eliminated, thereby further suppressing damage to the glass surface.

[0054] Furthermore, as described above, although the manufacturing method of glassine liner rolls has been explained, it is merely one example of the manufacturing method of glassine liner rolls and is not limited to this configuration. For example, if necessary, a coating section for applying coatings or the like to the surface of the smoothed paper may be provided between the drying section 13 and the calendering section 14.

[0055] In addition, the configuration in which two sets of paired calendering rollers are provided in the calendering section 14 has been described, but there are also cases where only one set or more sets of paired calendering rollers are provided.

Example

[0056] The following describes specific embodiments of the manufacturing method of the glass liner paper roll of the present invention, but the present invention is not limited to these embodiments.

[0057] <Example 1> (Preparation procedures, etc.) As the main raw material for glassine liner paper, virgin kraft pulp is used, and starch is added as an additive in the preparation process. Next, a pulping process is performed to obtain pulp stock 15a from this pulp. Furthermore, in pulp stock 15a of Example 1, the degree of dissociation is 500 ml. Additionally, the basis weight when becoming glassine liner paper 15e is 45 g / m². 2 Adjust the pulp slurry in the manner described in section 15a.

[0058] (Molded wire mesh process) The user of the paper machine 10 obtains wet paper 15b from pulp 15a in the forming wire section 11. In the forming wire process, the forming wire that receives pulp 15a consists of only one layer.

[0059] (Pressing process) The user of the paper machine 10 obtains pressed wet paper 15c from wet paper 15b in the press section 12.

[0060] (Drying process) The user of the paper machine 10 obtains dried paper 15d from the pressed wet paper 15c in the drying section 13 that constitutes the paper machine 10.

[0061] (Polishing process) The user of the paper machine 10 obtains glass liner paper 15e from dried paper 15d in the calendering section 14 constituting the paper machine 10. One of the calendering rolls constituting the calendering section 14 is made of cast iron. The longitudinal modulus of elasticity of the calendering roll is 152.3 GPa. Furthermore, the linear pressure load on the paired rolls is 10000 N / m. The material of the calendering roll and the values ​​of the linear pressure are shown in Table 1. In addition, a dust generation test was performed on the glass liner paper 15e. This dust generation test was based on the tumbling method described in JIS B 9923 (1997) (Method for Determination of Contaminating Particles in Cleanroom Clothing), using a tumbling dust generation testing machine CW-HDT-102 manufactured by Akado Seisakusho Co., Ltd. The result of this dust generation test was that the number of particles 0.3 μm or larger and 10 μm or smaller was 18. The results of this dust generation test are shown in Table 1.

[0062] (Rolling process) The user of the paper machine 10 obtains a glass liner roll 26 from the glass liner 15e in the winding section 16 that constitutes the paper machine 10. The end of the paper tube 25 used in the winding process is protected with a metal end material 25b.

[0063] (Damage Assessment) Glass liner 15e, which will become glass liner roll 26, is sandwiched between horizontally placed glass panes. After applying a virtual load of 30 kg, the glass liner 15e is removed, and the damage to the glass surface is visually observed. In Example 1, no damage was detected. The results of the damage test are shown in Table 1. The results are represented by A to D, where A is a satisfactory result, B is a result that is not satisfactory but relatively good, C is a result that is not good, and D is a result that is not completely good. In Example 1, where a predetermined linear pressure is applied using a cast iron calendering roller, and the dust generation test result is below the specified value, the damage evaluation is A, which is good.

[0064] <Comparative Example 1> In Comparative Example 1, all parameters were the same as in Example 1 except for the following: the applied linear pressure was 8000 N / m; and the number of particles in the dust generation test was 25. These parameters are shown in Table 1. The damage assessment was not considered satisfactory, but rather acceptable (B). The results are shown in Table 1.

[0065] <Comparative Example 2> In Comparative Example 2, all parameters were the same as in Example 1 except for the following: the applied linear pressure was 5000 N / m; and the number of particles in the dust generation test was 34. These parameters are shown in Table 1. The damage assessment was D, which cannot be described as completely good. The results are shown in Table 1.

[0066] <Comparative Example 3> In Comparative Example 3, the parameters were the same as in Example 1, except that the applied linear pressure was 1000 N / m and the number of particles in the dust generation test was 49. These parameters are shown in Table 1. The damage assessment was D, which cannot be described as completely good. The results are shown in Table 1.

[0067] <Comparative Example 4> In Comparative Example 4, all parameters were the same as in Example 1 except for the following: one side of the paired glass paper rolls was cast iron, and the other side was resin; and the number of particles in the dust generation test was 26. These parameters are shown in Table 1. The damage assessment was not acceptable, but rather good (B). The results are shown in Table 1.

[0068] <Comparative Example 5> In Comparative Example 5, all parameters were the same as in Example 1 except for the following: one side of the paired glass paper rolls was cast iron and the other was resin; the additional linear pressure was 8000 N / m; and the number of particles in the dust generation test was 35. These parameters are shown in Table 1. The damage assessment was rated as unsatisfactory (C). The results are shown in Table 1.

[0069] <Comparative Example 6> In Comparative Example 6, the parameters were the same as in Example 1, except that one side of the paired glass paper rolls was cast iron and the other was resin; the additional linear pressure was 5000 N / m; and the number of particles in the dust generation test was 47. These parameters are shown in Table 1. The damage assessment was D, which cannot be described as completely good. The results are shown in Table 1.

[0070] <Comparative Example 7> In Comparative Example 7, all parameters were the same as in Example 1 except for the following: one side of the paired glass paper rolls was cast iron and the other was resin; the additional linear pressure was 1000 N / m; and the number of particles in the dust generation test was 53. These parameters are shown in Table 1. The damage assessment was D, which cannot be considered completely good. The results are shown in Table 1.

[0071] <Comparative Example 8> In Comparative Example 8, all parameters were the same as in Example 1 except that both sides of the paired glass paper rolls were resin; and the number of particles in the dust generation test was 36. These parameters are shown in Table 1. The damage assessment was rated as unsatisfactory (C). The results are shown in Table 1.

[0072] <Comparative Example 9> In Comparative Example 9, all parameters were the same as in Example 1 except for the following: both sides of the paired glass paper rolls were resin; the additional linear pressure was 8000 N / m; and the number of particles in the dust generation test was 48. These parameters are shown in Table 1. The damage assessment was D, which cannot be described as completely good. The results are shown in Table 1.

[0073] <Comparative Example 10> In Comparative Example 10, all parameters were the same as in Example 1 except for the following: both sides of the paired glass paper rolls were resin; the additional linear pressure was 5000 N / m; and the number of particles in the dust generation test was 55. These parameters are shown in Table 1. The damage assessment was D, which cannot be described as completely good. The results are shown in Table 1.

[0074] <Comparative Example 11> In Comparative Example 11, all parameters were the same as in Example 1 except for the following: both sides of the paired glass paper rolls were resin; the additional linear pressure was 1000 N / m; and the number of particles in the dust generation test was 61. These parameters are shown in Table 1. The damage assessment was D, which cannot be described as completely good. The results are shown in Table 1.

[0075] Table 1 Explanation of reference numerals in the attached figures

[0076] 15: Glass liner; 15a: Pulp stock; 15b: Wet paper; 15c: Wet paper after pressing; 15d: Dry paper; 15e: Glass liner; 25: Paper tube; 25b: End protection material; 26: Glass liner roll.

Claims

1. A method for manufacturing a glass liner roll, characterized in that, Includes the following processes (1) to (5): (1) Forming wire process: The pulp is placed on a forming wire for papermaking to remove the water from the pulp and make wet paper; (2) Pressing process, which processes the wet paper into pressed wet paper; (3) Drying process: the pressed wet paper is made into dried paper; (4) Calendering process: the dried paper is made into glass backing paper; as well as (5) Rolling process: The glass liner paper is wound onto a paper tube with a predetermined structure to form a glass liner paper roll; In the calendering process, the dried paper is held by at least one pair of rollers and processed into the glass backing paper. The longitudinal elastic modulus of the materials on the surfaces of the pair of rollers is above 150 GPa. The linear pressure between the pair of rollers is above 10000 N / m. In the dust generation test of the glass liner paper constituting the glass liner paper roll, the number of particles with a size of 0.3 μm or larger and a size of 10 μm or smaller is 20 or less.

2. The method for manufacturing glass liner paper rolls according to claim 1, characterized in that, The ends of the paper tubes used in the winding process are provided with metal end protection material.

3. The method for manufacturing glass liner paper rolls according to claim 1, characterized in that, In the forming process, The forming wire that receives the pulp slurry consists of only one layer. The basis weight of the glass liner is 20 g / m². 2 Above and 80g / m 2 the following.

4. The method for manufacturing a glass liner roll according to claim 1, characterized in that, There are no connecting portions in the glass liner roll that connect the glass liners to each other.

5. The method for manufacturing a glass liner roll according to claim 1, characterized in that, The degree of dissociation of the pulp is less than 600 ml.

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