Method for manufacturing glass laminating roll

Abstract

To provide a method for manufacturing a glass interleaving paper roll capable of suppressing generation of scratches on a glass surface by reducing particles derived from a glass interleaving paper body and manufacturing equipment.SOLUTION: The method for producing a glass interleaving paper includes the following steps (1) to (5): (1) a wire step, (2) a press step, (3) a dryer step, (4) a calender step, and (5) a roll step. In the calendering step, the longitudinal elastic modulus of the material on the surfaces of the pair of rolls is 150 GPa or more, and the linear pressure is 10000N / m or more. Further, in a predetermined dust generation test, the number of particles of 0.3 μm or more and 10 μm or less is 20 or less. According to this aspect, the number of particles derived from the glass interleaving paper main body can be reduced, and even in a case where electric wiring or the like is formed on the surface of the plate-shaped glass, it is possible to suppress the occurrence of defects such as disconnection, and it is easy to maintain the degree of cleanliness of the clean room.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a glass interleaving paper roll. More specifically, the present invention relates to a method for manufacturing a glass interleaving paper roll that reduces particles originating from the glass interleaving paper itself or manufacturing equipment. [Background technology]

[0002] Glass interleaving paper is used by being sandwiched between glass sheets during the transport of glass sheets, such as architectural glass sheets, automotive glass sheets, plasma display glass sheets, and liquid crystal display glass sheets. Among these glass sheets, glass sheets for flat panel displays, particularly those used in liquid crystal displays, have elements such as fine electrical wiring, electrodes, electrical circuits, and partition walls formed on their surfaces. Therefore, even slight scratches or contamination on the surface can cause defects such as disconnections. More specifically, the size and number of scratches that pose a problem in glass sheets for flat panel displays are extremely high, and corresponding glass interleaving paper is also required to meet these requirements. In particular, to prevent scratches in glass sheets for flat panel displays, it is necessary to reduce the sand, rust, and other contaminants contained in the glass interleaving paper to an appropriate level.

[0003] Patent Document 1 discloses glass interleaving paper for flat glass used in flat panel displays and a method for manufacturing the same. Patent Document 1 uses the expression "immovable foreign matter," and this "immovable foreign matter" is measured after thorough cleaning with a roll brush. Note that in this specification, matter that cannot be removed even through thorough cleaning may be referred to as "contamination." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-226479 Summary of the Invention [Problem to be solved by the invention]

[0005] However, since the process of forming electrical wiring etc. on the surface of flat glass for flat panel displays is carried out in a clean room, the properties required for glass interleaving paper are not limited to the property of reducing "contamination" remaining after the above-mentioned hard cleaning, but also the property of reducing "particles" adhering to the surface of the glass interleaving paper must be considered. In recent years, the line width of electrical wiring etc. has become thinner, and the process of forming electrical wiring etc. is carried out in a clean room with a high level of cleanliness. Therefore, there is a problem that the properties related to "immovable foreign matter," i.e., "contamination," as described in Patent Document 1 alone may make the glass interleaving paper unsuitable for flat panel displays.

[0006] In view of the above circumstances, the present invention aims to provide a method for manufacturing a glass interleaving paper roll that can suppress the occurrence of scratches on the glass surface by reducing particles originating from the glass interleaving paper itself and the manufacturing equipment. [Means for solving the problem]

[0007] The manufacturing method of the first invention for a glass interleaving paper roll includes the following steps (1) to (5): (1) a wire process in which a pulp slurry is placed on a papermaking wire and moisture is removed from the pulp slurry to form a wet paper; (2) a pressing process in which the wet paper is pressed to form a wet paper; (3) a drying process in which the pressed wet paper is dried to form a dry paper; (4) a calendering process in which the dried paper is turned into a glass interleaving paper; and (5) a rolling process in which the glass interleaving paper is wound around a paper tube of a predetermined configuration to form a glass interleaving paper roll, wherein the calendering process is characterized in that the dry paper is sandwiched between at least a pair of rolls and the dry paper is processed into the glass interleaving paper, the longitudinal elastic modulus of the surface material of the pair of rolls is 150 GPa or more, the linear pressure between the pair of rolls is 10,000 N / m or more, and in a dust generation test of the glass interleaving paper that constitutes the glass interleaving paper roll, the number of particles of 0.3 μm to 10 μm is 20 or less. The method for manufacturing a glass interleaving paper roll of the second invention is characterized in that, in the first invention, a metal end protection material is provided on the end of the paper tube used in the rolling process. A third aspect of the present invention is a method for producing a glass interleaving paper roll according to the first aspect of the present invention, wherein in the wire step, the wire that receives the pulp slurry is composed of only one layer, and the glass interleaving paper has a basis weight of 20 g / m 2 More than 80g / m 2 The present invention is characterized by the following: The manufacturing method of a glass interleaving paper roll of the fourth invention is characterized in that, in the first invention, the glass interleaving paper roll does not have any connecting parts connecting the glass interleaving papers together. A fifth aspect of the present invention is a method for producing a glass interleaving paper roll according to the first aspect of the present invention, characterized in that the pulp slurry has a disintegration freeness of 600 ml or less. [Effects of the Invention]

[0008] According to the first invention, the Young's modulus of the material on the surface of at least one pair of rolls in the calendering process is 150 GPa or more, the linear pressure between these rolls is 10,000 N / m, and the number of particles of a predetermined size in a specified dust generation test is 20 or less, thereby reducing particles originating from the glass interleaving paper itself and suppressing the occurrence of scratches on the glass surface. Furthermore, even when electrical wiring or the like is formed on the surface of the plate glass, defects such as disconnection can be suppressed and the cleanliness of the clean room can be easily maintained. According to the second invention, by providing a metal end protection material on the end of the paper tube used in the product during the rolling process, the generation of particles from the paper tube during the production of the glass laminated paper roll, i.e., the generation of particles from the manufacturing equipment, can be suppressed, and the occurrence of scratches on the glass surface can be further suppressed. According to the third invention, the wire that receives the pulp slurry in the wire process is made up of only one layer, and the basis weight of the glass interleaving paper is 20 g / m 2 More than 80g / m 2By satisfying the above condition, foreign matter contained in the dried paper can be easily crushed in the calendering process, and as a result, the foreign matter will not scratch the glass surface, thereby further suppressing the occurrence of scratches on the glass surface. According to the fourth invention, since the glass interleaving paper roll does not have any connecting parts connecting the glass interleaving papers together, particles generated from these connecting parts can be eliminated, thereby further suppressing the occurrence of scratches on the glass surface. According to the fifth aspect of the present invention, the pulp slurry has a disintegration freeness of 600 ml or less, which allows the pulp to be entangled more effectively, thereby further reducing the amount of particles generated. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing the configuration of a calendar part that constitutes a manufacturing method of a glass interleaving paper roll according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a schematic diagram showing the flow of a method for manufacturing a glass interleaving paper roll according to an embodiment of the present invention. [Figure 3] 1 is a schematic diagram showing the configuration of a roll forming part that constitutes a manufacturing method for a glass interleaving paper roll according to an embodiment of the present invention. FIG. [Figure 4] FIG. 4 is a perspective view of a paper tube used in the rolling part of FIG. 3. [Figure 5] It is a front view of the cardboard tube used in the rolling part of Figure 3. Figure 5(A) is a front view including a partial cross section of the state in which the end protection material and the cardboard tube main body are assembled, and Figure 5(B) is a front view including a partial cross section of the state in which the end protection material is separated from the cardboard tube main body. DETAILED DESCRIPTION OF THE INVENTION

[0010] Next, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below exemplify a method for manufacturing a glass interleaving paper roll to embody the technical concept of the present invention, and the present invention does not limit the manufacturing method of a glass interleaving paper roll to the following. Furthermore, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described in the embodiments are merely illustrative examples and are not intended to limit the scope of the present invention. Furthermore, the sizes or positional relationships of the components shown in each drawing may be exaggerated for clarity.

[0011] <Embodiment> (Glass interleaving paper 15e) The glass interleaving paper 15e produced by the glass interleaving paper roll manufacturing method according to the present invention preferably has a thickness of 0.1 mm or less. This is preferable from the viewpoint of logistics, since a larger length of glass interleaving paper 15e can be obtained from one glass interleaving paper roll 26. This is also preferable when forming a glass plate package in which more glass plates and glass interleaving paper 15e are alternately stacked, since more glass plates can be stacked on a pallet. The thickness of the glass interleaving paper 15e is more preferably 0.09 mm or less, even more preferably 0.08 mm or less, and even more preferably 0.07 mm or less. The lower limit of the thickness of the glass interleaving paper 15e is not particularly limited, but is, for example, 0.01 mm or more.

[0012] When the glass interleaving paper 15e is rectangular, it is preferable that the short side be 730 mm or more. This allows it to be inserted between glass plates of larger sizes, which has been in demand in recent years. It is more preferably 100 mm or more, even more preferably 1500 mm or more, and even more preferably 2000 mm or more. There is no particular upper limit to the short side of the glass interleaving paper 15e, but it is, for example, 4000 mm or less.

[0013] The basis weight of glass interleaving paper 15e is 20 g / m 2 More than 80g / m 2It is preferable that the thickness of the glass interleaving paper 15e is less than or equal to 100%. In the lamination process between the glass plate and the glass interleaving paper 15e, where the thickness of the glass interleaving paper 15e becomes thinner and the short side becomes longer, the glass interleaving paper 15e needs to have higher strength, density, smoothness, water resistance, or moisture resistance. For this reason, more additives or new additives that have not been used before may be added.

[0014] (Main ingredient of glass interleaving paper 15e) The glass interleaving paper 15e manufactured by the manufacturing method of glass interleaving paper according to the present invention can be made from the following main raw materials. For example, chemical pulps such as kraft pulp (KP), sulfite pulp (SP), and soda pulp (AP); semi-chemical pulps such as semi-chemical pulp (SCP) and chemi-ground wood pulp (CGP); mechanical pulps such as groundwood pulp (GP), thermomechanical pulp (TMP, BCTMP), and refiner ground wood pulp (RGP); non-wood fiber pulps made from camellia, mitsumata, hemp, kenaf, etc.; synthetic pulp; etc. can be used as the main raw material. Furthermore, the main raw material may be a mixture of these, or a material containing cellulose or the like may be used as the main raw material.

[0015] The main raw material may be recycled paper, virgin pulp, or a mixture of recycled paper and virgin pulp, with virgin pulp being preferred.

[0016] In the glass interleaving paper 15e manufactured by the glass interleaving paper manufacturing method of the present invention, regardless of the pulp used, it is preferable to use as the main raw material pulp manufactured without using silicone-based defoaming agents, which are a major cause of wiring or electrode defects when transferred to a glass plate.

[0017] In particular, pulp produced without using a polydimethylsiloxane-containing defoaming agent is particularly suitable as the main raw material.

[0018] (Additives added to the main ingredients) Starch can be added as an additive. Starch is a type of adhesive. The main purpose of adhesives is to bond papers together using a Yankee dryer or similar. The main components of this adhesive are polyacrylate (AE), styrene-butadiene copolymer rubber (SBR), and starch. However, to suppress particle generation, it is preferable to use starch at a specific raw material weight ratio. Here, the raw material weight ratio refers to the weight ratio in the glass interleaving paper 15e after the calendering process.

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

[0020] Internal paper strength agents can be added as additives. Internal paper strength agents are used primarily to improve the strength of paper. A typical example of the main ingredient is polyacrylamide (PAM).

[0021] Pitch control agents can be added as additives. The main purpose of pitch control agents is to disperse or expel pitch (adhesive substances derived from resins or chemicals) from the system. Typical examples of the main ingredients are cationic polymers such as cationic (C-)PAM, polyethyleneimine (PEI), and C-acrylic, surfactants, polyacrylic acid, polyvinyl alcohol (PVA), and PAM.

[0022] Coagulants can also be added as an additive. The main purpose of coagulants is to turn fiber particles into small, dense aggregates. Because the pulp slurry and fiber particles are anionic, they are neutralized and coagulated by cationic coagulants. They also have the effect of fixing anionic sticky foreign substances to the pulp, preventing roll contamination. Typical examples of the main ingredients are polydiallyldimethylammonium chloride (PDADMAC) and PEI.

[0023] Dry strength agents can also be added as additives. Dry strength agents are primarily used to improve paper strength, especially in the dry state. Typical examples of the main components are AE, CS, PAM, and PVA.

[0024] Wet strength agents can also be added as additives. Wet strength agents are primarily used to improve paper strength, especially when wet. Typical examples of the main components are AE, polyamidepolyamine epichlorohydrin (PAE), PVA, polyvinylamine (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 primarily used to reduce water penetration, prevent bleeding, and improve water resistance. Typical examples of the main ingredients are 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 reduce water penetration, prevent bleeding, and improve water resistance. A typical example of the main component is styrene-acrylic copolymer (AS).

[0027] Thickeners can also be added as additives. The main purpose of thickeners is to increase viscosity, disperse pulp fibers evenly in water, and prevent settling. Typical examples of the main ingredients are AE, PAM, polyethylene oxide (PEO), CMC, and alginic acid (AA).

[0028] A water-resistant crosslinking agent can also be added as an additive. The main purpose of the water-resistant crosslinking agent is to improve water resistance and strength through crosslinking. A typical example of the main component is epoxy resin (ER).

[0029] In principle, the additives described above are preferably used in amounts appropriate for their respective main purposes.

[0030] In particular, the additive preferably contains a substance that is highly effective for the respective purposes of each papermaking chemical, i.e., at least one substance selected from the group consisting of alginic acid, polyacrylic acid ester, alkyl ketene dimer, styrene-acrylic copolymer, alkenyl succinic anhydride, epoxy resin, melamine resin, polyamide polyamine epichlorohydrin, polyvinyl chloride, polyvinylidene chloride, styrene-butadiene copolymer rubber, rosin, and polyethylene terephthalate, and derivatives thereof.

[0031] (Method of manufacturing glass interleaving paper roll 26) FIG. 2 is a schematic diagram showing the flow of the method for manufacturing a glass interleaving paper roll according to this embodiment. The flow of this manufacturing method runs from left to right on the page. In the method for manufacturing a glass interleaving paper roll according to this embodiment, the method for manufacturing the glass interleaving paper 15e is carried out by a single paper machine 10. That is, a single paper machine 10 is formed from multiple parts, and the glass interleaving paper 15e is manufactured by performing predetermined processes in each part, and a glass interleaving paper roll 26 is manufactured from this glass interleaving paper 15e. Although the method for manufacturing a glass interleaving paper roll according to this embodiment has been described as being carried out by a single paper machine 10, the method for manufacturing a glass interleaving paper roll according to the present invention is not limited to this configuration. For example, it is also possible to carry out the method by connecting together devices that perform only some of the multiple parts that make up the method for manufacturing glass interleaving paper.

[0032] The object to be manufactured flows from left to right in Fig. 2. In this specification, the left side of Fig. 2 may be referred to as the upstream side, and the right side as the downstream side. Throughout all manufacturing processes, the object to be manufactured is referred to as paper 15, and the term changes with each process to facilitate understanding.

[0033] Before reaching the paper machine 10, the user of the paper machine 10 preferably carries out a preparation step of preparing pulp, which is the raw material for preparing the paper stock liquid, and a pulp slurry step of producing pulp slurry 15a from the pulp.

[0034] The pulp slurry 15a used in this embodiment preferably has a disaggregated freeness of 600 ml or less. A disaggregated freeness of 600 ml or less of the pulp slurry 15a allows for increased entanglement of the pulp, further reducing the amount of particles generated. If the disaggregated freeness is greater than 600 ml, particle generation may not be sufficiently reduced. The disaggregated freeness herein refers to the Canadian Standard Freeness (Canadian Standard Pulp Freeness) value measured in accordance with JIS P 8121-2:2012 using the pulp slurry 15a obtained by disaggregating in accordance with JIS P 8220-1:2012.

[0035] An operator of the papermaking machine 10 performs a wire process in which pulp slurry 15a is converted into wet paper 15b in the wire part 11 that constitutes the papermaking machine 10. First, an operator of the papermaking machine 10 supplies pulp slurry 15a to a head box provided in the wire part 11. In the wire part 11, pulp slurry 15a is supplied in sheet form from the head box onto a wire installed in the wire part 11. More specifically, the wire is composed of a lower wire and an upper wire, and pulp slurry 15a supplied to the lower wire is then sandwiched between the lower wire and the upper wire, spread to a uniform thickness, and dewatered to form wet paper 15b.

[0036] The lower wire and the upper wire of the wire part 11 are permeable membranes formed in an endless band shape. Specifically, they are endless bodies made of mesh made of plastic or metal material, or felt made of natural or synthetic fibers.

[0037] The lower wire and the upper wire are wound around a plurality of rollers, and are rotated at a predetermined speed by transmitting the driving force of a motor to a driving roller among the rollers. In this embodiment, the lower wire that receives the pulp slurry 15a is made up of only one layer.

[0038] The lower wire that receives the pulp slurry 15a in the wire process is made up of only one layer, and the basis weight of the glass interleaving paper 15e is 20 g / m 2 More than 80g / m 2 By satisfying the following conditions, foreign matter contained in the drying paper 15d can be easily crushed in the calendering step, and as a result, the foreign matter will not scratch the glass surface, thereby further suppressing the occurrence of scratches on the glass surface.

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

[0040] The wet paper 15b formed in the wire part 11 is transported to the press part 12, which has a press roller, an endless felt strip, and a pair of press rollers, where the wet paper 15b is further dewatered and pressed simultaneously to become the pressed wet paper 15c.

[0041] The user of the paper machine 10 performs a drying process in the dryer part 13 of the paper machine 10 to turn the pressed wet paper 15c into a dried paper 15d.

[0042] The pressed wet paper 15c that has passed through the press part 12 is transported to the dryer part 13 consisting of multiple rollers, and while passing through the dryer part 13, it is dried in an atmosphere of about 120° C., for example, to become a dried paper 15d.

[0043] The user of the papermaking machine 10 carries out a calendering process in which the dried paper 15d is made into glass interleaving paper 15e in the calendering part 14 that constitutes the papermaking machine 10. FIG. 1 is a schematic diagram showing the configuration of the calendering part 14 that constitutes the manufacturing method of glass interleaving paper according to this embodiment. The dried paper 15d dried in the dryer part 13 is transported to the calendering part 14, where it is subjected to a calendering process such as by being sandwiched and transported by calender rolls, and the front and back surfaces are smoothed. The expression "calender rolls" refers to a configuration including a pair of rolls that are arranged to be able to sandwich the dried paper 15d.

[0044] The calender part 14 of this embodiment will be described with reference to FIG. 1. In this embodiment, two pairs of calender rolls are used. The upstream calender rolls are composed of a first upper roll 20a and a first lower roll 20b. The downstream calender rolls are composed of a second upper roll 21a and a second lower roll 21b. In this embodiment, the first upper roll 20a, the first lower roll 20b, the second upper roll 21a, and the second lower roll 21b all have a surface material with a Young's modulus of 150 GPa or more. Specific examples of materials with a Young's modulus of 150 GPa or more include cast iron, steel, and tungsten. "Steel" refers to an iron alloy containing 400 ppm to 2% carbon, such as special steels such as carbon steel and nickel-chromium steel. The upper limit of the Young's modulus is preferably 400 GPa. By specifying the upper limit in this way, it is possible to select a material suitable for use.

[0045] In this embodiment, the first upper roll 20a, the first lower roll 20b, the second upper roll 21a, and the second lower roll 21b are all made of a surface material with a Young's modulus of 150 GPa or more, but the present invention is not limited to this. For example, any of the surfaces of the four rolls may be made of an elastic roll such as a resin. However, it is necessary to provide at least one pair of calender rolls in which each of the rolls constituting the pair has a predetermined Young's modulus.

[0046] In this embodiment, the linear pressure between the pair of rolls, each having a surface material with a modulus of longitudinal elasticity of 150 GPa, is 10,000 N / m or more. By implementing this configuration and aspect, coarse particles contained in the drying paper 15d are crushed. The upper limit of the linear pressure is preferably 15,000 N / m or less. A higher limit could result in deformation of the rolls. By crushing the interleaving paper surface and strengthening the entanglement of the fibers, the number of particles measuring 0.3 μm to 10 μm in size can be reduced to 20 or less in a dust generation test of the glass interleaving paper 15e. This reduces particles originating from the glass interleaving paper 15e itself, thereby preventing scratches on the glass surface. Furthermore, even when electrical wiring or the like is formed on the surface of the plate glass, defects such as broken wires can be prevented, and the cleanliness of the clean room can be easily maintained. This dust generation test is a dust generation test by the tumbling method described in JIS B 9923 (1997), and a tumbling type dust generation tester CW-HDT-102 manufactured by Akado Seisakusho Co., Ltd. can be preferably used.

[0047] The paper that has been calendered in the calendering part 14 is wound around a reel 22 as glass interleaving paper 15 e to form a roll-shaped jumbo roll 23 , and this jumbo roll 23 is moved to the rolling part 16 .

[0048] 3 is a schematic diagram showing the configuration of the roll forming part 16 that constitutes the manufacturing method of the glass interleaving paper roll according to this embodiment. After completing each process in the paper machine 10 used in the manufacturing method of the glass interleaving paper roll according to this embodiment, the glass interleaving paper 15e is fed from the jumbo roll 23, cut to a predetermined width (cut in the longitudinal direction) by the cutter 24, and wound onto a paper tube 25. When the glass interleaving paper 15e fed from the jumbo roll 23 reaches a predetermined length, it is cut to the predetermined length (cut in the width direction) by the cutter 24, and a glass interleaving paper roll 26 is formed by winding a long glass interleaving paper 15e of the predetermined width. The long glass interleaving paper 15e wound around the glass interleaving paper roll 26 is cut into cut sheets (rectangular shapes) of a size corresponding to the glass plates to be laminated, and is interposed between the glass plates to be laminated.

[0049] Fig. 4 shows a perspective view of the cardboard tube 25 used in the rolling part 16, and Fig. 5 shows a front view of the cardboard tube 25. Fig. 5(A) is a front view including a partial cross-section of the cardboard tube 25 in an assembled state, and Fig. 5(B) is a front view including a partial cross-section of the cardboard tube 25 in a separated state.

[0050] In this embodiment, the cardboard tube 25 includes a cardboard tube body 25a made of paper and a metal end protection material 25b provided at the end of the cardboard tube body 25a. Conventionally, only the cardboard tube body 25a made of paper was used to manufacture the glass interleaving paper roll 26. However, it was confirmed that particles were dispersed from the cardboard tube body 25a in the final process, the rolling part 16. To prevent this dispersion, in this embodiment, a metal end protection material 25b is provided at the end of the cardboard tube 25. This end protection material 25b is preferably capable of covering the entire end of the cardboard tube body 25a. However, if the entire end is covered, the glass interleaving paper 15e and the end protection material 25b may come into contact, which may generate particles. Therefore, it is preferable that the metal end protection material 25b have an outer diameter slightly smaller than the outermost diameter of the cardboard tube body 25a. For example, it is preferable that 90% or more of the end of the cardboard tube body 25a be covered by the end protection material 25b.

[0051] By providing a metal end protection material 25b at the end of the paper tube 25 used in the rolling process, the generation of particles from the paper tube 25 during the production of the glass laminated paper roll 26, i.e., the generation of particles from the manufacturing equipment, can be suppressed, and the occurrence of scratches on the glass surface can be further suppressed.

[0052] Furthermore, in this embodiment, in the rolling process, when manufacturing the glass interleaving paper roll 26, the splice portions connecting the glass interleaving papers 15e are eliminated. Specifically, if a predetermined length of glass interleaving paper 15e does not remain in the jumbo roll 23, the glass interleaving paper roll 26 is manufactured from a new jumbo roll 23. Furthermore, if the glass interleaving paper 15e breaks when manufacturing the glass interleaving paper roll 26, the glass interleaving paper roll 26 in the middle of manufacturing is discarded without connecting the glass interleaving papers 15e. This makes it possible to eliminate the splice portions connecting the glass interleaving papers 15e in the glass interleaving paper roll 26.

[0053] Since the glass interleaving paper roll 26 does not have any joints connecting the glass interleaving papers 15e to each other, particles generated from these joints can be eliminated, thereby further suppressing the occurrence of scratches on the glass surface.

[0054] The method for manufacturing a glass interleaving paper roll has been described above, but this is merely an example of a method for manufacturing a glass interleaving paper roll, and the method is not limited to this configuration. For example, if necessary, a coater part for applying paint or the like to the smoothed paper surface can be provided between the dryer part 13 and the calendar part 14.

[0055] Furthermore, in the calender part 14, a configuration in which two pairs of calender rolls are provided has been described, but there are also cases in which only one pair of calender rolls or three or more pairs of calender rolls are provided. [Example]

[0056] Specific examples of the method for manufacturing a glass interleaving paper roll according to the present invention will be described below, but the present invention is not limited to these examples.

[0057] Example 1 (Preparation process, etc.) A preparation process was carried out by using virgin kraft pulp as the main raw material for the glass interleaving paper, and adding starch as an additive. Next, a pulp slurry process was carried out to obtain a pulp slurry 15a from this pulp. The pulp slurry 15a in Example 1 had a disintegrated freeness of 500 ml. The basis weight of the glass interleaving paper 15e was 45 g / m 2 The pulp slurry 15a was adjusted so that:

[0058] (Wire process) A user of the paper machine 10 obtains a wet paper 15b from the pulp slurry 15a in the wire part 11. The wire used in the wire process is configured with only one layer of wire that receives the pulp slurry 15a.

[0059] (pressing process) The user of the paper machine 10 obtained a pressed wet paper 15c from the wet paper 15b in the press part 12.

[0060] (Dryer process) The user of the paper machine 10 obtained dried paper 15d from the pressed wet paper 15c in the dryer part 13 of the paper machine 10.

[0061] (calendering process) The user of the papermaking machine 10 obtained glass interleaving paper 15e from dried paper 15d in the calender part 14 of the papermaking machine 10. One of the pair of calender rolls constituting this calender part 14 was made of cast iron. The calender roll had a modulus of longitudinal elasticity of 152.3 GPa. The linear pressure applied to this pair of rollers was 10,000 N / m. The calender roll materials and linear pressure values ​​are shown in Table 1. A dust generation test was also conducted on this glass interleaving paper 15e. This dust generation test was conducted using the tumbling method described in JIS B 9923 (1997) (Method for measuring contaminant particles in cleanroom clothing), and a tumbling-type dust generation tester CW-HDT-102 manufactured by Akado Seisakusho Co., Ltd. was used. As a result of this dust generation test, the number of particles between 0.3 μm and 10 μm in size was 18. The results of this dust generation test are shown in Table 1.

[0062] (Rolling process) The user of the paper machine 10 obtained a glass interleaving paper roll 26 from the glass interleaving paper 15e in the rolling part 16 that constitutes the paper machine 10. A metal end protection material 25b was used on the end of the paper tube 25 used in the rolling process.

[0063] (Damage rating) The glass interleaving paper 15e that had become the glass interleaving paper roll 26 was sandwiched between two horizontally placed glasses, and a virtual load of 30 kg was applied. The glass interleaving paper 15e was then removed, and the glass surface was visually inspected for scratches. No scratches were found in Example 1. Table 1 shows the results of the scratch test. The results are expressed as A to D, with A being a good result that passes, B being a relatively good result that cannot be said to pass, C being a result that cannot be said to be good, and D being a result that cannot be said to be good at all. In Example 1, where a pair of cast iron calender rolls was used and a predetermined linear pressure was applied, and the results of the dust generation test were below the predetermined value, the scratch evaluation was A, which means good.

[0064] <Comparative Example 1> In Comparative Example 1, the parameters were the same as in Example 1, except that 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 scratch evaluation was B, which cannot be said to be acceptable but can be said to be relatively good. The results are shown in Table 1.

[0065] <Comparative Example 2> In Comparative Example 2, the parameters were the same as in Example 1, except that 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 scratch evaluation was D, which cannot be said to be good at all. 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 scratch evaluation was D, which cannot be said to be good at all. The results are shown in Table 1.

[0067] <Comparative Example 4> In Comparative Example 4, the other parameters were the same as in Example 1, except that one of the paired glass interleaving rolls was made of cast iron and the other was made of resin, and the number of particles in the dust generation test was 26. These parameters are shown in Table 1. The scratch evaluation was B, which cannot be said to be acceptable but can be said to be relatively good. The results are shown in Table 1.

[0068] <Comparative Example 5> In Comparative Example 5, the parameters were the same as in Example 1, except that one of the pair of glass interleaving rolls was made of cast iron and the other was made of resin, the applied 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 scratch evaluation was C, which cannot be said to be good. 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 of the pair of glass interleaving rolls was made of cast iron and the other was made of resin, the applied 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 scratch evaluation was D, which cannot be said to be good at all. The results are shown in Table 1.

[0070] <Comparative Example 7> In Comparative Example 7, the parameters were the same as in Example 1, except that one of the paired glass interleaving rolls was made of cast iron and the other was made of resin, the applied 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 scratch evaluation was D, which cannot be said to be good at all. The results are shown in Table 1.

[0071] <Comparative Example 8> In Comparative Example 8, the other parameters were the same as in Example 1, except that both of the paired glass interleaving paper rolls were resin and the number of particles in the dust generation test was 36. These parameters are shown in Table 1. The scratch evaluation was C, which cannot be said to be good. The results are shown in Table 1.

[0072] <Comparative Example 9> In Comparative Example 9, the other parameters were the same as in Example 1, except that both of the paired glass interleaving paper rolls were made of resin, the applied 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 scratch evaluation was D, which cannot be said to be good at all. The results are shown in Table 1.

[0073] <Comparative Example 10> In Comparative Example 10, the other parameters were the same as in Example 1, except that both of the paired glass interleaving paper rolls were made of resin, the applied 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 scratch evaluation was D, which cannot be said to be good at all. The results are shown in Table 1.

[0074] <Comparative Example 11> In Comparative Example 11, the other parameters were the same as in Example 1, except that both of the paired glass interleaving paper rolls were made of resin, the applied 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 scratch evaluation was D, which cannot be said to be good at all. The results are shown in Table 1.

[0075] [Table 1] [Explanation of symbols]

[0076] 15 Glass interleaving paper 15a Pulp Slurry 15b Wet paper 15c wet paper after pressing 15d dry paper 15e Glass interleaving paper 25 Paper tube 25b Edge protection material 26 Glass interleaving paper roll

Claims

1. The following steps (1) to (5): (1) a wire process in which the pulp slurry is placed on a papermaking wire and moisture is removed from the pulp slurry to form a wet paper; (2) a pressing step of converting the wet paper into a pressed wet paper; (3) a drying step for drying the pressed wet paper; (4) a calendering step for converting the dried paper into glass interleaving paper; (5) a rolling step of winding the glass interleaving paper around a paper tube having a predetermined configuration to form a glass interleaving paper roll; It encompasses In the calendering step, the dry paper is sandwiched between at least a pair of rolls and processed into the glass interleaving paper; The longitudinal elastic modulus of the surface material of the pair of rolls is 150 GPa or more; The linear pressure between the pair of rolls is 10,000 N / m or more, In a dust generation test of the glass interleaving paper constituting the glass interleaving paper roll, the number of particles having a size of 0.3 μm or more and 10 μm or less is 20 or less. A method for manufacturing a glass interleaving paper roll.

2. At the end of the paper tube used in the rolling process, Metal edge protection is provided. The method for manufacturing a glass interleaving paper roll according to claim 1 .

3. In the wire process, Among the wires, the wire that receives the pulp slurry is made up of only one layer, The glass interleaving paper has a basis weight of 20 g / m ２ 80g / m or more ２ Below is the The method for manufacturing a glass interleaving paper roll according to claim 1 .

4. The glass interleaving paper roll includes: There is no connecting portion connecting the glass interleaving papers together, The method for manufacturing a glass interleaving paper roll according to claim 1 .

5. The pulp slurry has a disintegrated freeness of 600 ml or less. The method for manufacturing a glass interleaving paper roll according to claim 1 .

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