TW200422238A - Inserting paper for glass-like sheet materials - Google Patents

Abstract

The purpose of the present invention is to provide inserting paper for clean glass-like sheet materials reducing transport and storage costs without relying on packaging spacers, preventing paper marks, and providing electrostatic adhesion, comprised of a nonwoven sheet 20 made from regenerated cellulose 22 obtained by the viscose process, cuprammonium process, or other cellulose regenerating process, in particular one suppressed in content of hot water solubles (heat water soluble ingredients) to less than 0.1 wt % per unit nonwoven sheet, in which the nonwoven sheet 20 is formed so that the regenerated cellulose fibers 22 are fused through fused parts 21 without use of a binder and the surface of the nonwoven sheet is treated for dust prevention by for example pressing by a flat roller, suction by a suction system, etc. The obtained nonwoven sheet may be supercalendered.

Description

200422238 Π) 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to the interlining paper sandwiched between glass-like plates during transportation or storage of the glass-like plate, and in particular, to reduce the cause of the interlining paper itself to the glass surface. Soiled and dust-preventing backing paper. [Prior art] Generally, when conveying or storing glass-like plates such as glass plates, interleaving paper is sandwiched between glass-like plates to facilitate handling. In the past, especially the liner of recycled waste paper, when transported and stored, the water on the glass surface (moisture in the air) reacted with the alkaline components in the glass, and the glass was corroded to cause streaks. In addition, the ink contained in the waste paper and the resin component from the raw material of the waste paper itself are transferred to the glass-like sheet, causing contamination called a paper mark on the surface of the glass-like sheet. In order to prevent the occurrence of streaks or paper scars that occur when using conventional stabilizers, stabilizers (for example, refer to Patent Document 1) in which notches are arranged and dispersed, and stabilizers with zeolite in a papermaking process (for example, refer to Patent Document 2), a stabilizer coated with a water-soluble resin on the surface (for example, refer to Patent Document 3), a stabilizer for adjusting hot water soluble components (see, for example, Patent Document 4), and repeating Various physical property improvements such as contact surfaces are used. However, glass substrates used as substrates for flat panel displays (FPDs) such as liquid crystal displays (LCDs), plasma display panels (PDPs), and organic EL displays are required to have a higher surface level of -5. -(2) 200422238 淸 clarity. However, it is difficult to suppress the contamination of the glass surface to a required level even with the various types of stabilizers described above. Therefore, in the current situation, it is not used when transporting or storing "glass substrates" supplied to display processors, and only stays with the use of "glass mother boards" for coating glass to form glass substrates.

Therefore, when a glass substrate is transported or stored for a current display processor, a method of transporting and storing a glass-like sheet by using a resin packaging aid (spacer) is widely used (for example, (See Patent Document 5). According to this method, it is possible to prevent the glass-like plate members from adhering to each other, which is very effective for contaminating the surface of the glass-like plate materials. However, there is a problem in that the space generated between glass-like sheets is wasted by receiving the packaging aid, and only a small amount of glass-like sheets can be transported and stored at a time, which causes a problem that the cost during logistics and storage increases.

[Patent Document 1] Japanese Patent Laid-Open No. 5-2 0 8 8 4 [Patent Document 2] Japanese Patent Laid-Open No. 7-4 1 034 [Patent Document 3] Japanese Patent Laid-Open No. 9-170198 [Patent Document] 4] Japanese Patent Laid-Open No. 2003-41498 [Patent Document 5] Japanese Patent Laid-Open No. 2000-142873 [Summary of the Invention] [Problems to be Solved by the Invention] The present invention has been developed in view of the foregoing points, The purpose is to provide a kind of interlining paper which does not need to rely on packaging aids, can reduce transportation and storage costs, not only prevents paper marks, but also has electrostatic adhesion. -6-(3) 200422238 . [Means to Solve the Problem] That is, the invention in the first scope of the patent application is a glassy interlining paper, which is characterized by the content of the hot water soluble component of the non-woven fabric made of cellulose. It is less than 0.1% by weight. The invention in item 2 of the scope of patent application is an interleaving paper for a glass-like sheet material in which the scope of the patent application is applied, wherein the aforementioned non-woven fabric is formed without using. The invention in item 3 of the scope of patent application is the interlining paper of the glass-like sheet material in item 2 of the patent application, in which the aforementioned non-woven fabric is pressed by the surface roller. The invention in item 4 of the scope of patent application is a stabilizer for glass-like sheet material in any one of the scope of patent application 3, in which supercalender treatment is performed in the aforementioned line. The invention claimed in item 5 of the scope of patent application is the interlining paper for a glass-like plate according to any one of item 4 of the patent application, in which the aforementioned non-planar roughness is measured by a KES-FB-4S surface tester '. [Effects of the Invention] When the glassy paper of the invention according to item 1 of the scope of the patent application is a non-woven fabric using cellulose as a constituent material, there are conventional backing paper made of pulp or paper coated with a resin component. 1st or 1st to 1st to 1st to 1st cloth according to the 1st weaving without sizing agent. Eliminate the ingredients other than cellulose which is contained in the stabilizer (4) (4) 200422238. . As a result, the content of the hot water soluble component can be made less than 1% by weight, and it is very effective in suppressing contamination (paper marks) generated on the glass surface during transportation or storage. According to the invention of the glass-like sheet interleaving paper according to item 2 of the scope of the patent application, since no adhesive is used in the formation of the non-woven fabric, the interleaving paper is formed only by cellulose (regenerated cellulose), which is a constituent material. Eliminates impurities and other contents contained in conventional backing paper from transferring to the glass surface. As a result, the glass surface can be more effectively suppressed from being contaminated (paper marks), so that the glass-like sheet can be transported and stored in a very clean state. When the interlining paper of the glass-like plate according to the invention of claim 3 is applied to the non-woven cloth by the pressing process by the slip surface roller, dust particles can be suppressed when the interlining paper composed of the non-woven cloth is used. When the interlining paper of the glass-like plate material according to the invention in item 4 of the scope of the patent application is subjected to super-calendering treatment on the non-woven fabric, it is possible to further suppress generation of dust particles when using the interlining paper composed of the non-woven fabric. In addition, since the smoothness of the surface of the non-woven fabric is improved, the adhesion between the electrostatic interleaving paper (non-woven fabric) and the glass-like sheet is improved, and the convenience of inserting the interleaving paper between the glass-like sheet is improved. When the interleaving paper of the glass-like plate according to the invention of claim 5 has a surface roughness of 1.5 μm or less, a good electrostatic adhesion with the glass-like plate can be obtained. [Embodiment] The present invention will be described below with reference to the drawings. Fig. 1 is a cross-sectional view of a spun fiber according to an embodiment of the present invention. (5) (5) 200422238. Fig. 2 is a partially enlarged view of a non-woven fabric. Fig. 3 is a drawing showing a suction used for dust-proof treatment. A schematic cross-sectional view of an example of the device. The interleaving paper of the glass-like plate material of the present invention uses cellulose as a constituent material, and in particular, the content of hot water soluble components (hot water soluble components) is suppressed to a non-woven fabric of less than 0.1% by weight per unit of non-woven fabric. Furthermore, in the interleaving paper of the glass-like plate material of the present invention, the structural material composed of the aforementioned cellulose is formed as a non-woven fabric without using a binder (adhesive), and the surface of the non-woven fabric is appropriately subjected to a dust-proof treatment described later. , Super Calender. The cellulose of the present invention refers to a cellulose obtained from a pulp adjusted by cotton or wood chips by alkaline dissolution or the like, and a well-known cellulose regeneration method using a viscose method, a copper ammonia method, or the like (so-called Regenerated cellulose). The fibrous amidine (viscose method) and copper ammonium ammonium (copper ammonia method) correspond to the aforementioned regenerated cellulose. Since the aforementioned regenerated cellulose such as krypton is used as the constituent material of the non-woven fabric of the present invention, it is different from the so-called paper-made paper-made paper made of paper-made paper made of recycled paper or recycled paper, Equalization of the contained components can be achieved. In the case where the fibrillated samarium and copper ammonia ammonium are formed using the interleaving paper of a glass-like plate material as a woven cloth, generally, in a loom, it is necessary to appropriately penetrate the lubricating oil into the samarium and copper ammonia ammonium. In the final woven product, impurities such as oil components will remain. Therefore, especially when it is supposed to be used for conveyance of a glass substrate for a flat panel display (FPD), etc., there is concern that the residual oil component contaminates the surface of the glass substrate. In addition, when using a woven fabric made of conventional osmium and copper ammonia as a stabilizer for glass-like plates, -9- (6) (6) 200422238 must be separately removed from the oil by the woven fabric itself. , The complexity of the operating process and increase costs. Therefore, the interleaving paper of the glass plate-like material is as defined in the scope of the patent application, and it is desirable to use cellulose as a constituent material to make a non-woven fabric. There are also methods for adding various conventional binders to fibrous cellulose when processing non-woven fabrics. However, since the object of the present invention is to minimize the contamination of the surface of the glass-like sheet material, a non-woven fabric should be made without using an adhesive, as defined in the second scope of the patent application. As a method of manufacturing without using a binder, although a needle-punching method in which rays and copper ammonia rays which have been spun in advance are twisted by a needle and the fibers are entangled with each other is exemplified, it is necessary to appropriately Adhering lubricating oil to the needle is not preferable for the same reason as using the aforementioned loom. From the above viewpoints, as a production method without using a binder, a production method such as a water spray (sp unlace) method in which fibers of fibers of pre-manufactured osmium, copper ammonia, and the like adjacent to each other by high-pressure water flow are entangled with each other is used To produce a nonwoven fabric using the aforementioned regenerated cellulose as a constituent material. Further, in the process, the fiber dope (viscous solution) is continuously produced by spinning, and the constituent fibers are fixed to each other by hot pressing, to a non-woven fabric manufacturing method; in the copper ammonia process, the unregenerated state is continuously performed. Non-woven fabric made of water-swellable hydrogen on the surface of active fiber (Blau Faden; blue silk) followed by high-pressure water entanglement. The hot water soluble component in the scope of the patent application refers to the proportion of the total weight of the non-woven fabric that is dissolved in the hot water by the non-woven fabric of the present invention. As described in the foregoing prior art, during the transportation and storage of glass-like sheets -10- (7) 200422238, since the moisture in the air is absorbed by the interleaving paper, the problem of contamination of the glass surface by the components dissolved in the interleaving paper arises. Therefore, hot water-soluble components (hot-water soluble components) are specified by using the verification of the dissolution of components in the interleaving paper as an index.

The hot water soluble component of the present invention is described in detail in the examples described later, and it is based on "TAPPI T2 07 om_81, wood and pulp water soluble component, 6.2, hot water prepared by the American Paper & Pulp Technology Association (TAPPI)" Soluble ingredients ". As disclosed in Japanese Patent Application Laid-Open No. 2003-4 1 498 of the prior art, it is extremely difficult to make hot water-soluble components to less than 0.1% by weight in a glass-like sheet interlining paper made of conventional old paper. In contrast, the present invention can be known from the following examples, because cellulose is used as a constituent material, contains almost no other impurities, so the hot water soluble component can be made less than 0.1% by weight, for prevention It is effective to leave paper marks on the surface of glass-like plates (especially glass substrates). The description is about a non-woven fabric produced by a viscose method in order to obtain a non-woven fabric using the aforementioned regenerated cellulose as a constituent material.

The cellulose (cellulose) obtained from cotton, pulp, etc. is reacted with carbon disulfide under alkaline to prepare viscose. This is spun in a spinning bath containing a methylolating agent such as formaldehyde. To obtain cellulose 11 shown in the sectional view of FIG. 1, cellulose methylol xanthate (hereinafter referred to as HMCX) 12, cellulose sodium xanthate (hereinafter referred to as NaCX) 1 The spun fibers 10 composed of three layers of three. The general chemical structure of the three constituent components of the spun fiber 10 is shown in Table 1 below. -11. (8) (8) 200422238 [Table 1] Chemical structure of constituent components GI ucose—O — CS ^ —CH 2〇H HMCX 〇 GI uc [ose-0-CS2-CH2〇H u GI ucJose-0- CS2-CH2〇H 〇Glucose N a CX 0 GI u cjo s θ-O-CS 2-N a GI u 〇 丨 〇sei Glucose 〇Cellulose GI uc ^ os θ I Glucose i The fiber 10 is cut out, dispersed, and thinly formed to form a substantially planar body. In the presence of moisture, HMCX generates heat flow by thermal compression during embossing using an embossing roll. And melted with the surrounding spun fibers. In addition, as the heating progresses, the HMCX is thermally decomposed and converted into cellulose to form a fused portion 21 as shown in Fig. 2 (19) 200422238, which is partially enlarged and solidified. Then, shrinkage is performed under a dilute acid such as temperature and pH, and the aforementioned HMCX J is converted into cellulose. Then, by bleaching, washing, and drying, cellulose is used as a constituent material without using a binder. Figure 22 shows regenerated cellulose that has been converted into cellulose internally (as described above, the interleaving paper of the glass-like sheet of the present invention is due to the manufacturing process, and the cellulose-containing conductor is finally converted into cellulose, and cellulose is the constituent material. When the aforementioned non-woven fabric is formed, especially in the aforementioned embossing process, please refer to item 3 of the patent scope, and it is best to further press the wheel. In this way, when using a flat roller, the heat is pressed by pressing. The spun fibers are further smoothed by the flat rollers while suppressing the spun fibers of short fiber length. Therefore, the pressing treatment of the flat rollers can be used as a dustproof treatment. Furthermore, the shape of the embossing, The size and the amount of the plane roller are appropriately set. In addition, when the internal components of the spun fibers are completely converted into non-woven fabrics obtained by bleaching, washing, drying, etc., the fibers can also be used for winding. The suction device 30 is implemented as shown in the schematic cross-sectional view of FIG. 3 to attract dust from the surface of the nonwoven fabric. The suction device 30 is used for On the surface of the woven fabric 20 transferred by the transfer drum 45, the air sprayed from the pressurizing section 32 interacts with the ultrasonic waves radiated from the ultrasonic section 33 to spray the surface of the non-woven fabric to make the dust emission factor of the non-woven fabric 20 Appropriate after floating: NaCX, etc., I cloth 20 can be called in this system, such as Shen slip surface knurling press, fiber. Effectively press the vitamins and dry after the suction. The forward-feeding does not produce waves The surface vibrates and attracts -13 · (10) (10) 200422238 to the inside of the suction section 31 and is discharged to the outside through the exhaust port 35. Figure 3 shows the main reason for attracting dust from the non-woven 20 side, However, it is best to attract dust on both sides of the non-woven fabric. Figure 34 is the suction port and 40 is the static electricity removing part. Generally, it is used as a stabilizer for glass-like plates, such as JP 49- 1 3 It is disclosed in JP-65 No. 65 that at least one of the stabilizer and the glass-like sheet has a predetermined voltage, and the static electricity generated at this time is used to overlap both sides. That is, the static stabilizer is used to make the stabilizer Dense with glass plate , And the convenience of sandwiching the interleaving paper into the glass-like sheet. However, the surface of the non-woven fabric is rougher than the conventional interleaving paper. Therefore, the contact area between the glass-like sheet and the non-woven fabric is larger than that of the conventional interleaving paper Less, it cannot be said that the effect of improving the adhesion of static electricity is sufficiently obtained. Therefore, it is desirable to increase the adhesion of the nonwoven fabric and the glass-like sheet when the static electricity is present, as much as possible. Therefore, as described above, in order to improve the smoothness of the surface of the non-woven fabric that is finished with dustproof treatment at any time, super calendering is performed as disclosed in item 4 of the scope of patent application. The so-called super calendering The processing means that, usually, a metal roll and a non-metallic elastic roll are alternately overlapped to form a total of 5 to 20 segments. The non-woven fabric of the present invention is passed through the nonwoven fabric at a line pressure of 1 900 to 2600 N / cm (up to about 3 500 N). / cm) treatment under pressure. With this super-calendering treatment, the non-woven fabric is subjected to high pressure and the thickness is reduced. At the same time, the surface of the non-woven fabric is improved in dust resistance and smoothness. • 14- (11) 200422238. Furthermore, the processing conditions such as the pressure (line pressure), temperature, moisture content of the non-woven fabric, and pressing time of the supercalendering treatment are appropriately set.

Here, the smoothness of the non-woven fabric of the present invention is determined by the position of the surface roughness of the non-woven fabric (backing paper of glass-like plate material) as disclosed in item 5 of the scope of patent application. The surface roughness is preferably quantified by measuring with a KES-FB-4S surface testing machine manufactured by KATO TECH Co., Ltd., and is limited to 1 or less than 5 μm, and further limited to 1 · 2 μm or less. From the examples described later, it can be seen that a sample that has been subjected to a supercalendering treatment for the purpose of improving the smoothness can obtain good results when electrostatically adhered. In consideration of the above circumstances, the correlation between surface roughness and electrostatic adhesion can be inferred, and the suppression of surface roughness can be used as an indicator of improvement in electrostatic adhesion.

In addition, as described above, the interleaving paper of the glass-like plate material of the present invention has been described in detail. However, in the production of the interleaving paper, the fusion of the spun fibers with each other is omitted. The processing is performed only by the pressing process of the flat roller. In addition, when manufacturing a stabilizer made of non-woven fabric, according to the pressing process of the flat roller and the supercalendering process, manufacturing equipment, production cost, etc. are taken into consideration, and those which are appropriately incorporated into the manufacturing process are not necessarily limited to those described above. [Examples] The inventors described above, using a non-woven fabric made of cellulose as a constituent material without a binder as the stabilizer of the glass-like sheet of the present invention, will be manufactured by the viscose method described in detail above. The non-woven cloth (made by Nimura Chemical Industry Co., Ltd .: Taihe TCF) was made as a -15- (12) 200422238 interleaving paper for the glass plate of the example. For the non-woven fabric of the foregoing embodiment, the pressing of the flat roller during the embossing process is performed as a dustproof treatment.

In addition, a comparative example was compared with the interleaving paper of the Example, using interleaving paper actually used as the interleaving paper of a glass mother board for a flat panel display substrate. In the above-mentioned comparative example, the interlining paper (manufactured by N Corporation: NPD) made of a thin sheet of acidic paper made of conventional pulp was used as Comparative Example 1, and the interlining paper (N company was made of neutral paper) Co., Ltd .: NDP) as Comparative Example 2 and a mount paper (manufactured by T Corporation: ATP) recycled from old paper as Comparative Example 3. [Determination of soluble components in hot water]

The stabilizers of Examples and Comparative Examples 1 to 3 were evaluated on the basis of the aforementioned "TAPPI Ding 207 om-8I, materials and pulp water soluble components, 6.2, hot water soluble components". Specifically, 5 g each of the stabilizers of Examples and Comparative Examples 1 to 3 were taken as samples, 250 g of distilled water was added to each, and boiling was continued for 30 minutes. The extraction solution was decanted, and 250 g of distilled water was added thereto, and the mixture was continuously boiled for 30 minutes. This operation was performed 3 times, and the extract was collected 3 times. The extraction liquid was evaporated in an evaporating dish, dried, and then slammed, and the weight ratio of each sample to form a dried product was determined as the hot water soluble component (% by weight). The results are shown in Table 2. • 16- (13) (13) 200422238 [Table 2] Material 1 of sample backing paper · 1 ------ Hot water soluble component (% by weight) Example cellulose • Non-woven 0.08 Comparative Example 1 Acid paper 0.42 Comparative Example 2 Neutral Paper 0.44 Comparative Example 3 Old Paper 0.91 From the results in Table 2 above, it can be seen from the results in Table 2 that the glass paper sheet of the example is compared with the paper of Comparative Examples 1 to 3 because It is necessary to use a bonding agent, so it can be deduced by analogy that the amount of soluble components in hot water is significantly less, which is effective for preventing paper marks on the glass surface. [Evaluation of influence on glass surface] The stabilizers of Examples and Comparative Examples 1 to 3 which were cut into rectangles in parallel were arranged in parallel, and these stabilizers were sandwiched by two sheets of TFT-LCD module glass. Further, the glass was held in styrofoam (Polyuron) with equal pressure, and fixed with a rubber ring. The integrated body of such glass and backing paper was exposed for a maximum of 318 hours at a temperature of 60 ° C and a relative humidity of 95%. For the integrated body of the sheet glass and the backing paper, the water vapor was brought into contact with the surface of the sheet glass, and after forming a mist state, a fine-pored polyurethane sponge was used, and the pressure-sensitive adhesive surface of each backing paper was strongly rubbed once. . After the surface of the sheet glass was dried, the water vapor was brought into contact again, and visually, the 4-level geomantic evaluation of the degree of glass of the paper mark (PaPet mark) on the adhesive surface of the backing paper. At -17 · (14) 200422238, the same evaluation was performed. According to the degree of wiping of the paper marks, the backing paper on which the backing paper was most closely wiped was evaluated as "1", and the backing paper that was least easily wiped was dense. The facing stabilizer was evaluated as "4". Sum evaluation for each elapsed time 値 'performs a four-stage total evaluation. In addition, in order to correctly evaluate the paper marks, it was confirmed that the exposed portions of the plate glass not in contact with the backing paper did not have streaks. Table 3 below shows the passage of exposure time and the contamination of the glass surface. [Table 3] Elapsed time Examples Comparative Example 1 Comparative Example 2 Comparative Example 3 (hr) Cellulose nonwoven (acid paper) (Neutral paper) (Old paper) _ 118 1 3 2 4-145 1 3 2 4__ 178 1.5 1 .5 3 4__ 226 1 2 3 4 -298 1 2 3 4 -3 18 1 2.5 2.5 4 __. Total 6.5 14 15.5 2 4 __. Total evaluation 1 2 3 From the results in Table 3 above, it can be seen that the examples Compared with the stabilizer of any of the comparative examples, the stabilizer showed good characteristics and stable quality. Based on this result, it showed that the amount of water-soluble components and the contamination of the glass surface Establish a clear relationship, especially the -18 · (15) (15) 200422238 embodiment of the present invention, that is, a non-woven fabric formed by using cellulose as a constituent material without using a binder, which is particularly suitable for highly demanding applications.衬 Clean glass substrate for the transportation or storage of glass substrates. [Modulation of non-woven fabrics] From the above results, the inventors confirmed the suitability of non-woven fabrics. As mentioned above, the three types of fabrics produced by the viscose method have different basis weights (g / m2) and surface roughness (μπι). Non-woven fabrics (Emura Chemical Industry Co., Ltd .: Taihe TCF series). Regarding the aforementioned three types of non-woven fabrics, in the following examples, they are identified as samples 1-1, samples 1-2, and samples 1-3. In addition, only the nonwoven fabrics of samples 1-3 were pressed by a flat roller when embossing was performed. In addition, the inventors performed super-calendering treatment on the nonwoven fabrics of the above-mentioned samples 1-1, 1-2, and 1-3 in order to control the smoothness of the surface of the nonwoven fabric. In the following examples, the non-woven fabric that has been super-calendered in the aforementioned sample 1 _ 丨 is used as the sample 2 · 1. Similarly, the non-woven fabric that has been subjected to the same treatment in the sample material 1-2 is used as the sample 2_2. Non-woven fabrics subjected to the same treatment in samples 1 to 3 were identified as samples 2 and 3. The conditions of this super calendering process are 14 stages, 3 stages of nip, nip, linear pressure: 1 960 N / Cm, temperature · 80 ° C, and processing speed: 60 m / min. [Measurement of surface roughness 〔For the non-woven fabric of each sample mentioned above, the surface roughness was measured using a KES-FB-4S surface testing machine manufactured by KATO TECH Co., Ltd., -19- (16) (16) 200422238. The measurement conditions Static load: 98 mN, Tension: 196 m N / cm, Contact length: 5 mm, Pull speed: 0.1 cm / sec, Pull distance: 2 cm. When measuring each sample, The vertical and horizontal measurements were performed five times each to calculate the average 値 and the average 値 of the cross, and the larger one was used as the surface roughness of the sample. [Measurement of electrostatic adhesion] The temperature was maintained at 20 ° C and relative humidity at room temperature 6 In 5% of the room, on the glass of the TFT-LCD module plate cut into the A4 version, the non-woven fabrics of the aforementioned samples that are cut into the A4 version are overlapped and the same. From these non-woven fabrics, an electrostatic charging device (static micro- Device JKK-3: Kasuga Electric Co., Ltd.) 'Gives -20kV static electricity to charge. In some cases, the charging electrode port of the aforementioned electrostatic charging device is charged to the non-woven fabric of each sample, and the entire non-woven fabric is charged while being held at a position of 5 cm directly above. The needle glass is fully charged, and the plate glass and each sample are described. The integral body of the non-woven fabric is completely inverted, and the time until the non-woven fabric of the sample is completely peeled off by the plate glass is measured. The time is measured up to 20 seconds. For the aforementioned samples 1-1, 1-2, and 1 -3, Sample 2β1, Sample 2-2, Nonwoven fabric of Sample 2-3, and Comparative Example 2 (Neutral Paper), the physical properties and measurement results of these are shown in Table 4. -20 · 200422238 [Inch cough] I Comparative Example 2 (Neutral paper) KT) m 0.55 in 20 seconds with super calendering sample 2-3 〇0.81 OO o 20 seconds or more I sample 2-2 〇0.63 (N 20 seconds or more sample 2-1 0.77 CM 20 seconds The above untreated sample is 3 〇 0.21 00 13 seconds sample 1-2 ο 0.16 10 seconds sample 1-1 § 0.18 o Unit area weight (g / m2) Density (g / m3) Surface roughness (μηι) t # § | i ¢ 1 氍 _ Μ

-21-(18) (18) 200422238 Table 4 shows that 'Compared to sample id, sample _2, and sample 3, sample 2 -1, sample 2 · 2, and sample 2-3 which have been super-calendered. The number of surface roughness times is reduced. As a result, the electrostatic adhesion of the sample was greatly improved. Therefore, the smoothness of the surface of the nonwoven fabric can be said to be very effective for improving the electrostatic adhesion. In addition, the comparison of Sample 2-2, Sample 2-2, Sample 2-3 and Comparative Example 2 'showed the same electrostatic adhesion as that of the conventional stabilizer (Comparative Example 2: Neutral Paper). Therefore, the inventors have confirmed that when a non-woven fabric that has been subjected to supercalendering is used, it is possible to perform adhesion to a glass-like sheet using static electricity, and to facilitate the operation of sandwiching a stabilizer with a glass-like sheet. Promotion. [Determination of Dustiness] In a clean room with a level of 1 0 0 0 0, chlorine is assembled in which only one of the side surfaces consisting of 7 0 0 mm x 5 0 0 mm X 5 0 deep legs can be opened. Simple cover made of vinyl. A hole is opened in the center of the top of the simple photo, and the suction port of the air / particle counter (portable type: made by HIAC / ROICO) is set in the same simple type as a droop of about 10 cm. Non-woven fabric previously cut into A4 version (approximately 210 mm x 297 mm) of the aforementioned g-form 1-1, g-form 1-2, sample 1 · 3, sample 2-1, sample 2-2, and sample 2-3 Each of the polylines is given a size of W8 from the initial size. Next, the simple-type cover was opened at about 100 nm, and the non-woven fabric with each sample with a fold line was applied to the approximate central portion of the simple-type cover at a rate of 5 seconds at a time, using a pair of scissors for a total of one sample. 8 cuts. • 22 · 200422238 Π9) Measured by the airborne particle counter described above. · Among the particles (dust) scattered by the sample into the clean room due to the above-mentioned cutting, especially particles larger than 0.3 μm. The measurement results are shown in Table 5. In addition, the measured number of particles is calculated as the number of cubic feet per unit. For reference, the converted number of cubic feet per unit is also included. -23- 200422238 〔S〕 With super calendering sample 2-3 295 10,417 j Sample 2-2 1,555 00 〇Inch sample 2-1 2,890 102,048 Untreated sample 1-3 675 23,835 Sample 1-2 3,035 107,168 Sample 1 -1 〇〇〇 " 285,840 0.3 μηι or more number of examples rn (pieces / m3) conversion 値 (21) (21) 200422238 As can be seen from Table 5, compared to the sample 丨 _, the sample 丨 _2, the sample ] _ 3, the number of particles measured for samples 2d, samples 2-2, and samples 2_3 subjected to super-calendering treatment were all reduced by approximately one-half. Therefore, the super-calendering treatment is also very effective as a dustproof treatment for nonwovens. As a result, the application of the backing paper, which has been limited to the "glass mother plate" used to form a glass substrate by coating a film, can be extended to the time of transportation or storage of the "glass substrate" supplied to a display processor. Therefore, even when the glass substrate is transported or stored, it is not necessary to rely on the packaging aid (spacer), and it is expected that the throughput and storage amount of the glass substrate can be increased each time. [Brief description of the drawings] FIG. 1 is a cross-sectional view of a spun fiber according to an embodiment of the present invention. Fig. 2 is a partially enlarged view of a nonwoven fabric according to an embodiment of the present invention. Fig. 3 is a schematic cross-sectional view showing an example of a suction device used for dust-proof processing. [Illustration of drawing number] 10 ... spun fiber 1 1 ... cellulose 1 2 ... HMCX 1 3 ... NaCX 20 ... non-woven fabric 21 ... fused portion 22 ... regenerated cellulose 25-200422238 (22) 3 0 ... suction device 3 1 ... attractor 32 ... pressurization 33 ... ultrasonic generator

Claims (1)

200422238 (1) Pick up and apply for patent scope 1 · A kind of interleaving paper of glassy plate, non-woven fabric with cellulose as its constituent material, which is characterized in that the content of the hot water soluble component of the non-woven fabric is less than 0.1 weight %. 2. If the interlining paper of the glass-like plate is applied for in item 1 of the scope of patent application, the non-woven fabric is formed without using an adhesive. 3 · The interlining paper of glass-like sheet material according to the scope of the patent application item No. 2 or No. 2, in which the aforementioned non-woven fabric is pressed by a flat roller. 4. The interlining paper of glass-like sheet material as claimed in item 1 or 2 of the patent application scope, wherein the aforementioned non-woven fabric is supercalendered. 5. The interlining paper of glass-like sheet material as in item 3 of the patent application scope, wherein the aforementioned non-woven fabric is super-calendered. 6 · If the interleaving paper of glass-like sheet of the item No. 丨 or 2 of the scope of patent application, wherein the surface roughness of the aforementioned non-woven fabric is measured according to the KES-FB-4S surface testing machine, it is 1.5 μm or less. 7. The interleaving paper for glass-like sheet material according to item 3 of the scope of patent application, wherein the surface roughness of the aforementioned non-woven fabric is measured in accordance with a KES-FB-4S surface testing machine and is 1.5 μm or less. 8. The interleaving paper for glass-like sheet material according to item 4 of the scope of patent application, wherein the surface roughness of the aforementioned non-woven fabric is 1.5 μm or less as measured by a KES-FB-4S surface testing machine. 9. The interleaving paper for a glass-like plate material as claimed in claim 5 in which the surface roughness of the aforementioned non-woven fabric is 1.5 μm or less as measured by a KES-FB_4S surface testing machine. -27-