TWI701195B - Glass plate-interleaving paper and manufacturing method thereof - Google Patents
Glass plate-interleaving paper and manufacturing method thereof Download PDFInfo
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- TWI701195B TWI701195B TW108110309A TW108110309A TWI701195B TW I701195 B TWI701195 B TW I701195B TW 108110309 A TW108110309 A TW 108110309A TW 108110309 A TW108110309 A TW 108110309A TW I701195 B TWI701195 B TW I701195B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D57/00—Internal frames or supports for flexible articles, e.g. stiffeners; Separators for articles packaged in stacks or groups, e.g. for preventing adhesion of sticky articles
- B65D57/002—Separators for articles packaged in stacks or groups, e.g. stacked or nested
- B65D57/003—Separators for articles packaged in stacks or groups, e.g. stacked or nested for horizontally placed articles, i.e. for stacked or nested articles
- B65D57/004—Separators for articles packaged in stacks or groups, e.g. stacked or nested for horizontally placed articles, i.e. for stacked or nested articles the articles being substantially flat panels, e.g. wooden planks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/48—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for glass sheets
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
- C03B40/02—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it by lubrication; Use of materials as release or lubricating compositions
- C03B40/033—Means for preventing adhesion between glass and glass
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/005—Mechanical treatment
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Packaging Frangible Articles (AREA)
- Paper (AREA)
- Buffer Packaging (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
本發明係關於一種於將用於液晶顯示器、電漿顯示器、有機電致發光(有機EL)顯示器等平板顯示器之數片玻璃板積層並加以保管、搬運之過程中,包裝玻璃板之紙、及夾入玻璃板之間之紙、以及該等紙之製造。 The present invention relates to a paper for packaging glass plates in the process of laminating several glass plates used in flat panel displays such as liquid crystal displays, plasma displays, and organic electroluminescence (organic EL) displays, and storing and transporting them, and Paper sandwiched between glass plates, and the manufacture of such paper.
一般而言,於將用於平板顯示器之數片玻璃板積層並加以保管之保管過程、利用軌道等進行搬運之流通過程等中,為了防止玻璃板彼此受到衝擊導致相互接觸而產生擦傷,又,玻璃表面被來自外界之污染物質污染,而將被稱為間隔紙之紙夾入玻璃板之間。 Generally speaking, in the storage process where several glass plates used in flat panel displays are stacked and stored, and the distribution process where the glass plates are transported by rails, etc., in order to prevent the glass plates from being impacted and contacting each other and causing scratches, and, The surface of the glass is contaminated by pollutants from outside, and paper called spacer paper is sandwiched between the glass plates.
平板顯示器用玻璃板與普通建築用窗玻璃板、車輛用窗玻璃板等相比,因用於高精細顯示器,故要求玻璃表面保持為儘量不存在紙表面所包含之雜質之潔淨表面,又,為了達成高速應答性及擴大視野角而要求其平坦度優異。 Compared with ordinary building window glass panels, vehicle window glass panels, etc., flat panel display glass panels are used for high-definition displays. Therefore, the glass surface is required to be kept as clean as possible without the impurities contained in the paper surface. In order to achieve high-speed responsiveness and widen the viewing angle, excellent flatness is required.
作為用於此種用途之間隔紙,已提出若干種可防止玻璃板破裂或表面損壞,又不會污染玻璃表面之間隔紙。例如,於專利文獻1中,揭示有於間隔紙之表面形成鍍氟皮膜之方法。又,於專利文獻2中,揭示有貼合有聚乙烯系樹脂製發泡片與聚乙烯系樹脂製膜之間隔紙;於專利文獻3中,揭示有由含有50質量%以上漂白化學紙漿之紙漿所構成之紙,其係含有特定之環氧烷(alkylene oxide)加成物、水可溶性聚醚改質聚矽氧之玻璃用間隔紙;於專利文獻4中,揭示有規定了紙中之樹脂成分之量、使用了考慮到玻璃表面污染之原料之玻璃板用間隔紙。 As spacer paper for this purpose, several kinds of spacer paper have been proposed that can prevent the glass plate from cracking or surface damage without polluting the glass surface. For example, Patent Document 1 discloses a method of forming a fluorine-plated film on the surface of spacer paper. In addition, Patent Document 2 discloses a spacer paper laminated with a polyethylene resin foam sheet and a polyethylene resin film; Patent Document 3 discloses a paper made of bleached chemical pulp containing 50% by mass or more. A paper made of pulp is a glass spacer paper containing a specific alkylene oxide adduct and a water-soluble polyether modified polysiloxane; in Patent Document 4, it is disclosed that the The amount of resin composition uses spacer paper for glass plates that takes into account the contamination of the glass surface.
[專利文獻1]日本特開2012-188785號公報 [Patent Document 1] JP 2012-188785 A
[專利文獻2]日本特開2010-242057號公報 [Patent Document 2] JP 2010-242057 A
[專利文獻3]日本特開2008-208478號公報 [Patent Document 3] JP 2008-208478 A
[專利文獻4]日本特開2006-44674號公報 [Patent Document 4] JP 2006-44674 A
例如,已知於TFT液晶顯示器之製造步驟之一即陣列步驟之彩色濾光片基板製作時,於玻璃板表面有破裂、損傷等、或於玻璃表面受到污染之情形時會產生斷線等問題。其原因在於,彩色濾光片基板係於玻璃板上以濺鍍或真空蒸鍍法等形成並製作半導體膜、ITO膜(透明導電膜)、絕緣膜、鋁金屬膜等薄膜,但若玻璃板表面存在破裂、損傷、污染物質,則由薄膜形成之電路圖案上會產生斷線,或由絕緣膜之缺陷而產生短路。又,於彩色濾光片基板之製作中,於玻璃板上利用光蝕刻而形成圖案,但該步驟中若於抗蝕劑塗佈時之玻璃板面存在破裂、損傷、污染物質,則於曝光或顯影後之抗蝕劑膜上會產生針孔,其結果產生斷線或短路。相同之問題於有機EL顯示器之製造中亦得到確認。有機EL顯示器係於玻璃基板上以濺鍍、蒸鍍、或印刷等形成並製作ITO陽極、有機發光層、陰極等薄膜,故若於玻璃基板表面存在妨礙薄膜之破裂、損傷、污染物質,則會產生不發光之問題。 For example, it is known that when the color filter substrate of the array step, which is one of the manufacturing steps of TFT liquid crystal display, is produced, there will be problems such as breakage, damage, etc. on the surface of the glass plate, or when the glass surface is contaminated. . The reason is that the color filter substrate is formed on a glass plate by sputtering or vacuum evaporation, etc., and thin films such as semiconductor film, ITO film (transparent conductive film), insulating film, and aluminum metal film are made. If there are cracks, damages, and contaminants on the surface, the circuit pattern formed by the thin film will have a disconnection or a short circuit due to the defect of the insulating film. In addition, in the production of the color filter substrate, the pattern is formed by photoetching on the glass plate, but if there are cracks, damages, or contaminants on the glass plate surface when the resist is applied in this step, the exposure Or pinholes may occur in the resist film after development, resulting in disconnection or short circuit. The same problem has also been confirmed in the manufacture of organic EL displays. The organic EL display is formed on a glass substrate by sputtering, vapor deposition, or printing to produce ITO anodes, organic light-emitting layers, cathodes and other thin films. Therefore, if there are substances on the surface of the glass substrate that hinder the cracking, damage, and pollution of the thin films, Will produce the problem of no light.
特定出此種玻璃板之破裂、損傷、污染之原因較為困難,但已判明其原因之一在於微細之異物,該微細之異物係存在於玻璃板用間隔紙之表面,或自玻璃板用間隔紙之表面轉移至玻璃板之表面。 It is difficult to identify the causes of cracks, damages, and contamination of such glass plates, but it has been determined that one of the causes is fine foreign matter, which is present on the surface of the glass plate spacer paper or from the glass plate spacer The surface of the paper is transferred to the surface of the glass plate.
又,已判明此種異物之一係莫氏硬度為4以上之異物。 In addition, it has been found that one of such foreign substances is a foreign substance having a Mohs hardness of 4 or more.
此外,將玻璃板用間隔紙夾入玻璃板之間時,於間隔紙之正面及背面之表面之物理狀態存在差異之情形時,有時必須考慮使間隔紙之特定之表面與玻璃板之表面接觸。例如,對於平板顯示器用玻璃板而言,為了於其表面形成微細之電路等,即便為微量之異物,亦特別忌避其之附著或由該異物導致之破裂、損傷,但若於此種玻璃板用間隔紙之一表面存在有相較另一表面更多之異物,則由該異物導致的玻璃板表面之破裂或損傷、或該異物轉移至玻璃板表面之風險提高,故應該考慮以使異物較少之表面而並非異物存在較多之表面與玻璃板之表面接觸的方式使間隔紙與玻璃板之表面接觸。該情形時,考慮將兩片間隔紙夾入玻璃板之間,使各間隔紙之表面中之異物存在量較少之表面朝向玻璃板,但會使間隔紙之使用量增大,間隔紙與玻璃板之積層體之重量增大,故於處理方面不佳。 In addition, when the spacer paper for the glass plate is sandwiched between the glass plates, when there is a difference in the physical state of the front and back surfaces of the spacer paper, it is sometimes necessary to consider the specific surface of the spacer paper and the surface of the glass plate. contact. For example, for glass plates for flat-panel displays, in order to form fine circuits on the surface, even a small amount of foreign matter is particularly prevented from adhesion or cracking and damage caused by the foreign matter. If there are more foreign objects on one surface of the spacer paper than on the other surface, the risk of cracking or damage to the surface of the glass plate caused by the foreign objects, or the risk of the foreign objects being transferred to the surface of the glass plate is increased, so it should be considered to make foreign objects The surface of the glass plate is in contact with the surface of the glass plate in a way that the surface with fewer surfaces is not more foreign objects. In this case, consider sandwiching two pieces of spacer paper between the glass plates, so that the surface of each spacer paper with a small amount of foreign matter facing the glass plate will increase the amount of spacer paper used. The weight of the laminated body of the glass plate increases, so the handling is not good.
本發明之課題在於解決由玻璃板用間隔紙之正面及背面之狀態不同所導致的上述問題點。本發明之課題尤其在於提供一種使其正面及背面之任一者皆可與玻璃板接觸之玻璃板用間隔紙。 The problem of the present invention is to solve the above-mentioned problem caused by the difference in the state of the front and back of the spacer paper for glass plates. In particular, the subject of the present invention is to provide a spacer paper for glass plates whose front and back surfaces can contact the glass plate.
因此,經努力研究後,本發明者發現可提供一種玻璃板用間隔紙,其藉由減少玻璃板用間隔紙之表面所存在之莫氏硬度為4以上之異物之量,且抑制該間隔紙之正面及背面之莫氏硬度為4以上之異物的存在比例之不同,可抑制玻璃板用間隔紙之正面及背面之狀態之不同,使其正面及背面之任一者皆可與玻璃板接觸,從而完成本發明。 Therefore, after diligent research, the inventor found that it is possible to provide a spacer paper for glass plates by reducing the amount of foreign matter with a Mohs hardness of 4 or more present on the surface of the spacer paper for glass plates and suppressing the spacer paper The difference in the existence ratio of foreign matter with Mohs hardness of 4 or more on the front and back can suppress the difference in the state of the front and back of the spacer paper for the glass plate, so that either the front or the back can be in contact with the glass plate , Thereby completing the present invention.
本發明之第1態樣係一種玻璃板用間隔紙,其以木漿為原料,且一表面所存在之莫氏硬度為4以上之異物的存在比例為每1000m2未達10個,一表面上之上述異物的存在比例與另一表面上之上述異物的存在比例之差係每1000m2為4個以內。 The first aspect of the present invention is a spacer paper for glass plates, which uses wood pulp as a raw material, and the proportion of foreign matter with a Mohs hardness of 4 or more present on a surface is less than 10 per 1000 m 2 . The difference between the above-mentioned foreign matter existence ratio and the above-mentioned foreign matter existence ratio on the other surface is within 4 per 1000 m 2 .
較佳為上述異物包含金屬氧化物或無機矽氧化物。較佳為上述無機矽氧化物為二氧化矽。 It is preferable that the above-mentioned foreign matter contains a metal oxide or an inorganic silicon oxide. Preferably, the above-mentioned inorganic silicon oxide is silicon dioxide.
更佳為上述異物為選自由氧化鐵、銅、石英、熔融石英、氧化鈦、玻璃片、石英片、氧化鎂及砂所組成之群中之一者以上。 More preferably, the foreign matter is one or more selected from the group consisting of iron oxide, copper, quartz, fused silica, titanium oxide, glass flakes, quartz flakes, magnesia, and sand.
較佳為上述異物之體積未達2×10-5mm3。 Preferably, the volume of the above-mentioned foreign body is less than 2×10 -5 mm 3 .
較佳為本發明之玻璃板用間隔紙之基重為20~100g/m2。 Preferably, the basis weight of the spacer paper for glass plates of the present invention is 20-100 g/m 2 .
較佳為本發明之玻璃板用間隔紙之厚度為0.030~0.130mm。 Preferably, the thickness of the spacer paper for the glass plate of the present invention is 0.030 to 0.130 mm.
較佳為本發明之玻璃板用間隔紙之含水量為2~10質量%。 Preferably, the water content of the spacer paper for glass plates of the present invention is 2-10% by mass.
較佳為上述玻璃用於顯示器。較佳為上述顯示器為TFT液晶顯示器或有機EL顯示器。 Preferably, the above-mentioned glass is used for a display. Preferably, the above-mentioned display is a TFT liquid crystal display or an organic EL display.
本發明亦關於一種上述玻璃板用間隔紙與上述玻璃板之積層物。 The present invention also relates to a laminate of the spacer paper for the glass plate and the glass plate.
本發明之第2態樣係關於一種製造方法,其係製造上述玻璃板用間隔紙之方法,至少包含:漿料製備步驟,其製備木漿之漿料;片形成步驟,其將上述漿料形成為片狀;濕紙製備步驟,其將上述片脫水而形成濕紙;及乾燥步驟,其將上述濕紙乾燥而獲得上述間隔紙;且於上述濕紙製備步驟中自上述片之兩面進行脫水。 The second aspect of the present invention relates to a manufacturing method, which is a method of manufacturing the above-mentioned spacer paper for glass plates, at least comprising: a slurry preparation step, which prepares wood pulp slurry; and a sheet formation step, which combines the above-mentioned slurry Formed into a sheet; a wet paper preparation step, which dehydrates the above-mentioned sheet to form a wet paper; and a drying step, which dries the above-mentioned wet paper to obtain the above-mentioned spacer paper; and in the above-mentioned wet paper preparation step is performed from both sides of the above-mentioned sheet Dehydrated.
較佳為藉由抽吸而進行上述脫水。 Preferably, the above-mentioned dehydration is performed by suction.
較佳為上述片之一表面之上述抽吸的脫水比例與另一表面之上 述抽吸的脫水比例之差為該另一表面之上述抽吸的脫水比例之10%以下。 Preferably, the difference between the dehydration ratio of the suction on one surface of the sheet and the dehydration ratio of the suction on the other surface is 10% or less of the dehydration ratio of the suction on the other surface.
較佳為上述製造方法包含對上述乾燥步驟後之間隔紙之兩面進一步進行抽吸之追加抽吸步驟。 Preferably, the manufacturing method described above includes an additional suction step of further suctioning both sides of the spacer paper after the drying step.
本發明之玻璃板用間隔紙中,表面所存在之莫氏硬度為4以上之異物之量較少,且該間隔紙之正面及背面之莫氏硬度為4以上之異物的存在比例之不同得到抑制,玻璃板用間隔紙之正面及背面之莫氏硬度為4以上之異物的存在狀態之不同得到抑制。因此,本發明之玻璃板用間隔紙其正面及背面之任一者皆可與玻璃板接觸。藉此,本發明之玻璃板用間隔紙之操作性優異。 In the spacer paper for glass plates of the present invention, the amount of foreign matter with a Mohs hardness of 4 or more on the surface is relatively small, and the ratio of foreign matter with a Mohs hardness of 4 or more on the front and back of the spacer paper is different. Suppressing the difference in the existence of foreign matter with Mohs hardness of 4 or more between the front and back of the spacer paper for glass plates is suppressed. Therefore, any one of the front and back of the spacer paper for glass plates of the present invention can be in contact with the glass plate. Thereby, the spacer paper for glass plates of the present invention has excellent operability.
又,玻璃板用間隔紙原本係被卷取成輥狀而出貨,於該卷取狀態下間隔紙之正面與背面接觸,故於例如正面較少地存在莫氏硬度為4以上之異物但背面較多地存在莫氏硬度為4以上之異物之情形時,即便欲使間隔紙之正面與玻璃板之表面接觸,於卷取狀態下間隔紙之背面之莫氏硬度為4以上之異物亦會轉移至正面,從而有該正面之清潔性降低之虞。 In addition, the spacer paper for glass plates is originally rolled into a roll and shipped. In the wound state, the front and back of the spacer are in contact with each other. Therefore, for example, there are few foreign objects with a Mohs hardness of 4 or more on the front. When there are many foreign objects with Mohs hardness of 4 or more on the back, even if the front side of the spacer paper is to be in contact with the surface of the glass plate, the foreign objects with the Mohs hardness of 4 or more on the back of the spacer paper in the rolled state It will be transferred to the front, and the cleanliness of the front may be reduced.
然而,本發明之玻璃板用間隔紙即便成為被卷取成輥狀之狀態,亦可抑制莫氏硬度為4以上之異物自間隔紙之一表面向另一表面轉移,故無需擔心因被卷取成輥狀而導致間隔紙正面之清潔性降低,即莫氏硬度為4以上之異物的存在比例增加。 However, even if the spacer paper for glass plates of the present invention is rolled into a roll shape, it can suppress the transfer of foreign matter with a Mohs hardness of 4 or more from one surface of the spacer paper to the other surface, so there is no need to worry about being rolled. Taking it into a roll shape reduces the cleanliness of the front side of the spacer paper, that is, the proportion of foreign matter with a Mohs hardness of 4 or more increases.
進而,本發明之玻璃板用間隔紙中,表面所存在之莫氏硬度為4以上之異物之量較少,故即便該間隔紙與玻璃板表面接觸,亦可減少甚至避免玻璃板表面產生破裂、損傷等,又,可有效地抑制甚至避免莫氏硬度為4以上之異物自該間隔紙向玻璃板轉移之問題。藉由如此減少甚至避免玻璃板表面產生破裂、損傷等之問題,又抑制甚至避免莫氏硬度為4以上之異物向玻璃板轉移之問題,例如於TFT液晶顯示器等之製造步驟中,能夠防止彩色膜等之電路斷線。 Furthermore, in the spacer paper for glass plates of the present invention, the amount of foreign matter with a Mohs hardness of 4 or more present on the surface is small, so even if the spacer paper contacts the surface of the glass plate, it can reduce or even avoid cracks on the surface of the glass plate. , Damage, etc., and can effectively prevent or even avoid the transfer of foreign matter with a Mohs hardness of 4 or more from the spacer paper to the glass plate. By reducing or even avoiding the problems of cracks and damages on the surface of the glass plate, it also prevents or even avoids the transfer of foreign matter with a Mohs hardness of 4 or higher to the glass plate. For example, in the manufacturing steps of TFT liquid crystal displays, it can prevent color The circuit of the film is broken.
本發明之第1態樣係一種玻璃板用間隔紙,其以木漿為原料,且一表面所存在之莫氏硬度為4以上之異物的存在比例為每1000m2未達10個,一表面上之上述異物的存在比例與另一表面上之上述異物的存在比例之差係每1000m2為4個以內。 The first aspect of the present invention is a spacer paper for glass plates, which uses wood pulp as a raw material, and the proportion of foreign matter with a Mohs hardness of 4 or more present on a surface is less than 10 per 1000 m 2 . The difference between the above-mentioned foreign matter existence ratio and the above-mentioned foreign matter existence ratio on the other surface is within 4 per 1000 m 2 .
所謂本發明之玻璃板用間隔紙之表面所存在之莫氏硬度為4以上之異物每1000m2未達10個,係指本發明之玻璃板用間隔紙單獨存在,即本發明之玻璃板用間隔紙未與玻璃板積層之狀態下,該間隔紙之表面所存在之上述異物的存在比例為每1000m2未達10個。其中,較佳為於本發明之玻璃板用間隔紙與玻璃板接觸或被擠壓於玻璃板之狀態,即本發明之玻璃板用間隔紙與玻璃板積層之狀態下,該間隔紙之表面所存在之上述異物的存在比例為每1000m2未達10個。 The so-called foreign matter with Mohs hardness of 4 or higher existing on the surface of the spacer paper for glass plates of the present invention does not reach 10 per 1000 m 2 means that the spacer paper for glass plates of the present invention exists alone, that is, the glass plate of the present invention In the state where the spacer paper is not laminated with the glass plate, the ratio of the above-mentioned foreign matter existing on the surface of the spacer paper is less than 10 per 1000 m 2 . Among them, it is preferable that the spacer paper for the glass plate of the present invention is in contact with the glass plate or pressed against the glass plate, that is, when the spacer paper for the glass plate of the present invention is laminated with the glass plate, the surface of the spacer paper The ratio of the above-mentioned foreign matter present is less than 10 per 1000 m 2 .
本發明中所能使用之木漿係將針葉樹漂白牛皮紙漿(NBKP)、闊葉樹漂白牛皮紙漿(LBKP)、針葉樹漂白亞硫酸鹽紙漿(NBSP)、闊葉樹漂白亞硫酸鹽紙漿(LBSP)、熱機械紙漿(TMP)等木漿單獨使用或混合而成者。能夠以該木漿為主體,並視需要將麻、竹、槁(straw)、洋麻、楮、三椏或棉等非木漿、陽離子化紙漿、絲光化紙漿等改質紙漿、嫘縈、維尼綸、尼龍、丙烯酸、聚酯等合成纖維或化學纖維、或者微纖維化紙漿單獨添入或混合併用。然而,若紙漿中較多地包含樹脂成分,則該樹脂成分有造成污染玻璃板表面等之惡劣影響的可能性,故較佳為儘量單獨使用樹脂成分較少之化學紙漿,例如 針葉樹漂白牛皮紙漿。又,如碎木紙漿般之高產率紙漿較多地含有樹脂成分故不佳。再者,若使合成纖維、化學纖維混合則刀削性提高,使間隔紙形成平版時之作業性提高,但於廢棄物處理之方面,再利用性變差,故需注意。 The wood pulps that can be used in the present invention are conifer bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), conifer bleached sulfite pulp (NBSP), hardwood bleached sulfite pulp (LBSP), thermomechanical pulp (TMP) and other wood pulp used alone or mixed. The wood pulp can be used as the main body, and if necessary, hemp, bamboo, straw, non-wood pulp such as kenaf, chrysanthemum or cotton, cationized pulp, mercerized pulp and other modified pulp, rayon, pooh Synthetic fibers or chemical fibers such as nylon, nylon, acrylic, polyester, or microfibrillated pulp are added separately or mixed together. However, if the pulp contains more resin components, the resin components may cause adverse effects such as contaminating the surface of the glass plate. Therefore, it is better to use chemical pulp with less resin components as much as possible, such as conifer bleached kraft pulp . In addition, high-yield pulp like shredded wood pulp contains a lot of resin components and is therefore not preferable. In addition, if synthetic fiber and chemical fiber are mixed, the cutting performance is improved, and the workability when forming the spacer paper into a lithographic plate is improved. However, in terms of waste disposal, the reusability is deteriorated, so be careful.
上述木漿之形態並無特別限定,可採取片狀、塊狀或薄片狀之任意形態。片狀之紙漿可使用例如具備網部、擠壓部、乾燥部、後處理之4個步驟之抄漿機(pulp machine)而獲得。網部係使用長網或真空濾光片等對紙漿纖維進行抄紙,擠壓部係使用滾壓機進行脫水。乾燥部係利用滾筒乾燥機、或Fläkt乾燥器等進行乾燥,最後將片狀紙漿之兩端切下並卷取成輥狀。此種方法詳細記載於紙漿技術協會出版之「紙漿製造技術系列」、「紙漿製造技術全書」中。再者,塊狀之紙漿例如可將上述片狀紙漿積層而獲得,又,薄片狀之紙漿例如可將上述片狀紙漿粉碎而獲得。 The form of the wood pulp is not particularly limited, and it can take any form of sheet, block, or flake. The sheet-like pulp can be obtained by using a pulp machine equipped with 4 steps, for example, a wire part, a pressing part, a drying part, and a post-processing. The wire part uses a Fourdrinier wire or vacuum filter to make paper from the pulp fiber, and the extrusion part uses a roller press for dehydration. The drying part uses a drum dryer or a Fläkt dryer to dry, and finally cuts off the two ends of the sheet pulp and winds it into a roll. This method is described in detail in the "Pulp Manufacturing Technology Series" and "Pulp Manufacturing Technology Book" published by the Pulp Technology Association. In addition, the block-shaped pulp can be obtained, for example, by laminating the aforementioned sheet-like pulp, and the flake-shaped pulp can be obtained, for example, by pulverizing the aforementioned sheet-like pulp.
上述片狀紙漿之厚度較佳為0.7~1.5mm,更佳為0.9~1.3mm,進而更佳為1.0~1.2mm。 The thickness of the above-mentioned sheet-like pulp is preferably 0.7 to 1.5 mm, more preferably 0.9 to 1.3 mm, and even more preferably 1.0 to 1.2 mm.
上述片狀紙漿之基重較佳為400~1300g/m2,更佳為500~1200g/m2,進而更佳為500~1100g/m2,再進而更佳為500~1000g/m2,又進而更佳為700~1000g/m2。 The basis weight of the above-mentioned sheet pulp is preferably 400~1300g/m 2 , more preferably 500~1200g/m 2 , still more preferably 500~1100g/m 2 , and still more preferably 500~1000g/m 2 , It is still more preferably 700 to 1000 g/m 2 .
於本發明之玻璃板用間隔紙中,將一表面之莫氏硬度為4以上之異物的存在比例限制為每1000m2未達10個。上述玻璃板用間隔紙之一表面上所存在之莫氏硬度為4以上之異物之個數較佳為8個/1000m2以下,更佳為6個/1000m2以下,進而更佳為4個/1000m2以下,再進而更佳為3個/1000m2以下,又進而更佳為2個/1000m2以下,尤佳為1個/1000m2以下。 In the spacer paper for glass plates of the present invention, the proportion of foreign substances with a Mohs hardness of 4 or higher on one surface is limited to less than 10 per 1000 m 2 . The number of foreign objects with a Mohs hardness of 4 or more on the surface of the spacer paper for glass plates is preferably 8/1000m 2 or less, more preferably 6/1000m 2 or less, and still more preferably 4 /1000m 2 or less, still more preferably 3 pieces/1000m 2 or less, still more preferably 2 pieces/1000m 2 or less, particularly preferably 1 piece/1000m 2 or less.
於本發明之玻璃板用間隔紙中,一表面上之莫氏硬度為4以上之異物的存在比例與另一表面上之莫氏硬度為4以上之異物的存在比例之差係每1000m2為4個以內,較佳為每1000m2為3個以內,更佳為每1000m2為2個以內, 進而更佳為每1000m2為1個以內。即,於本發明之玻璃板用間隔紙中,較佳為一表面之莫氏硬度為4以上之異物的比例相較於另一表面之莫氏硬度為4以上之異物的存在比例不會以兩者之差成為上述具體範圍內之程度較大地變動。 In the spacer paper for glass plates of the present invention, the difference between the proportion of foreign matter with a Mohs hardness of 4 or higher on one surface and the proportion of foreign matter with a Mohs hardness of 4 or higher on the other surface is per 1000 m 2 less than 4, preferably less per 1000m 2 to 3, more preferably 1000m 2 per 2 or less, and further more preferably 1000m 2 or less per 1. That is, in the spacer paper for glass plates of the present invention, it is preferable that the ratio of foreign matter with a Mohs hardness of 4 or more on one surface is not lower than the ratio of foreign matter with a Mohs hardness of 4 or more on the other surface. The difference between the two changes greatly within the above-mentioned specific range.
此處,所謂「存在比例」,係指間隔紙表面之每單位面積之莫氏硬度為4以上之異物的數量,例如可藉由利用電子顯微鏡對玻璃板用間隔紙表面之多個部位放大觀察,且將於該部位觀察之莫氏硬度為4以上之異物之數量進行平均而決定。或作為另一方法,將玻璃板用間隔紙之規定面積之表面利用水或酸性溶液或者鹼性溶液充分地清洗,對脫落之莫氏硬度為4以上之異物進行計數,藉此亦可決定莫氏硬度為4以上之異物的存在比例。 Here, the so-called "existence ratio" refers to the number of foreign objects with a Mohs hardness of 4 or more per unit area on the surface of the spacer paper. For example, the surface of the spacer paper for glass plates can be magnified and observed by using an electron microscope. , And determine the average number of foreign objects with a Mohs hardness of 4 or more observed at the site. Or as another method, the surface of a specified area of the spacer paper for the glass plate is sufficiently cleaned with water or acid solution or alkaline solution, and the foreign matter with Mohs hardness of 4 or more that has fallen off is counted, and the Mohs can be determined by this method. The proportion of foreign matter with a hardness of 4 or more.
本發明之玻璃板用間隔紙中,表面所存在之莫氏硬度為4以上之異物之量較少,且可抑制該間隔紙之正面及背面之莫氏硬度為4以上之異物的存在比例之變動,藉此,可抑制玻璃板用間隔紙之正面及背面之物理狀態之不同。因此,於本發明之玻璃板用間隔紙中,表面之莫氏硬度為4以上之異物的存在比例於間隔紙之正面及背面並無較大之差異。因此,對本發明之玻璃板用間隔紙而言,其正面及背面之任一者皆可與玻璃板接觸。 In the spacer paper for glass plates of the present invention, the amount of foreign matter with a Mohs hardness of 4 or more on the surface is small, and the ratio of foreign matter with a Mohs hardness of 4 or more on the front and back of the spacer can be suppressed Variation, thereby, can suppress the difference in physical state between the front and back of the spacer paper for glass plates. Therefore, in the spacer paper for glass plates of the present invention, there is no significant difference in the proportion of foreign matter with a Mohs hardness of 4 or more between the front and back of the spacer paper. Therefore, for the spacer paper for glass plates of the present invention, either of the front and back surfaces can be in contact with the glass plate.
作為本發明之莫氏硬度為4以上之異物,可為由無機系或有機系之任一者之物質所構成之粒子,較佳為無機系粒子。作為上述異物,可列舉例如莫氏硬度為4以上之金屬氧化物或無機矽氧化物。構成金屬氧化物之金屬只要其氧化物之莫氏硬度為4以上則並無特別限定,可列舉例如鎂等第2族元素之元素、鈦等第4族元素、鐵等第8族元素。作為無機矽氧化物,較佳為二氧化矽。作為上述莫氏硬度為4以上之異物,可列舉例如氧化礦物。作為上述莫氏硬度為4以上之異物,尤其可列舉氧化鐵、銅、石英、熔融石英(石英玻璃)、氧化鈦、玻璃片、石英片、氧化鎂、砂等。砂主要由莫氏硬度為5.5之角閃石、莫氏硬度為6之長石及莫氏硬度為7之石英所構成。因此,砂之莫氏硬度為4以上,典型而 言為7。所謂莫氏硬度係將硬度之指標以10級表示者,其係將分別對應之標準物質與要測定之物質進行摩擦,根據是否有損傷而對相對於標準物質之硬度之大小進行相對評估後所得之值。標準物質由軟(莫氏硬度為1)至硬(莫氏硬度為10)依序為:1:滑石,2:石膏,3:方解石,4:螢石,5:磷灰石,6:長石,7:石英,8:黃玉,9:剛玉,10:金剛石。莫氏硬度之測定方法為,準備兩片表面平滑且已知莫氏硬度之板,將欲測定之異物夾於兩片板之間,將兩方之板相互摩擦而檢查板表面有無產生損傷。 The foreign matter having a Mohs hardness of 4 or more in the present invention may be particles composed of inorganic or organic substances, and inorganic particles are preferred. Examples of the aforementioned foreign matter include metal oxides or inorganic silicon oxides having a Mohs hardness of 4 or more. The metal constituting the metal oxide is not particularly limited as long as the Mohs hardness of the oxide is 4 or more, and examples include group 2 elements such as magnesium, group 4 elements such as titanium, and group 8 elements such as iron. As the inorganic silicon oxide, silicon dioxide is preferred. Examples of the foreign matter having a Mohs hardness of 4 or more include oxide minerals. Examples of the foreign matter having a Mohs hardness of 4 or more include iron oxide, copper, quartz, fused silica (quartz glass), titanium oxide, glass flakes, quartz flakes, magnesium oxide, and sand. Sand is mainly composed of hornblende with Mohs hardness of 5.5, feldspar with Mohs hardness of 6 and quartz with Mohs hardness of 7. Therefore, the Mohs hardness of sand is 4 or more, typically 7. The so-called Mohs hardness refers to the hardness index expressed in 10 grades, which is obtained by rubbing the corresponding standard material with the material to be measured, and comparing the hardness relative to the standard material according to whether there is damage. The value. The standard materials from soft (Mohs hardness of 1) to hard (Mohs hardness of 10) are: 1: talc, 2: gypsum, 3: calcite, 4: fluorite, 5: apatite, 6: feldspar , 7: Quartz, 8: Topaz, 9: Corundum, 10: Diamond. The method of measuring the Mohs hardness is to prepare two plates with a smooth surface and a known Mohs hardness, sandwich the foreign matter to be measured between the two plates, rub the two plates against each other to check whether the surface of the plate is damaged.
作為該異物容易包含於玻璃板用間隔紙,其中作為有可能使玻璃板表面受損之異物,多數來自原材料,尤其多數為莫氏硬度為7之石英、熔融石英、砂及石英片、莫氏硬度為6之氧化鎂、氧化鈦及氧化鐵、莫氏硬度為5~8之銅、莫氏硬度為4~7之玻璃片之情形。 The foreign matter is easily contained in the spacer paper for the glass plate. Among them, the foreign matter that may damage the surface of the glass plate is mostly derived from raw materials, especially quartz, fused silica, sand and quartz flakes with a Mohs hardness of 7 In the case of magnesium oxide, titanium oxide, and iron oxide with a hardness of 6, copper with a Mohs hardness of 5-8, and glass sheets with a Mohs hardness of 4-7.
本發明中,異物之體積較佳為控制於未達0.00002mm3,更佳為未達0.00001mm3。異物不同於污物,其作為立體物而存在於間隔紙之表面或內部而引發問題。尤其若異物之大小成為0.00002mm3以上,則使用該玻璃板用間隔紙時,有異物與玻璃板表面接觸而留下損傷或破裂之可能性變高之傾向。例如,將玻璃板用間隔紙與玻璃板積層時,有間隔紙表面所存在之異物由於玻璃板之重量而受到擠壓之情形,但若異物之大小較小,則即便受到擠壓,異物亦會埋入間隔紙之紙中,故對玻璃板表面造成損傷之可能性降低。再者,如上所述,異物為立體物,故尤其於其投影面積較小但具有一定高度之情形時,有作為玻璃或玻璃板用間隔紙移動時所產生的刮傷而留下肉眼可見之損傷之虞。相反地,於其高度較低但投影面積較大之情形時,有對玻璃板之表面造成損傷之虞,故仍不佳。 In the present invention, the volume of the foreign matter is preferably controlled to less than 0.00002 mm 3 , more preferably less than 0.00001 mm 3 . Foreign matter is different from dirt. It exists as a three-dimensional object on the surface or inside of the spacer paper and causes problems. In particular, if the size of the foreign matter becomes 0.00002 mm 3 or more, when the spacer paper for glass plates is used, there is a tendency that the foreign matter contacts the surface of the glass plate and leaves damage or cracks. For example, when the glass plate is laminated with spacer paper and the glass plate, the foreign matter on the surface of the spacer paper may be squeezed due to the weight of the glass plate. However, if the size of the foreign matter is small, the foreign matter will also be squeezed. It will be buried in the paper of the spacer paper, so the possibility of damage to the surface of the glass plate is reduced. Furthermore, as mentioned above, the foreign object is a three-dimensional object, so especially when its projected area is small but has a certain height, it may be seen as a scratch when moving the glass or glass plate spacer paper. Risk of injury. Conversely, when the height is low but the projected area is large, it may damage the surface of the glass plate, so it is still not good.
上述異物之球體積等值徑之平均粒徑較佳為30μm以下,更佳為20μm以下,進而更佳為10μm以下,再進而更佳為5μm以下,尤佳為1μm以下。 所謂球體積等值徑,係指將異物之粒子換算成同體積之球之情形時該球之直徑,可藉由雷射繞射法等而測定。 The average particle diameter of the spherical volume equivalent diameter of the foreign matter is preferably 30 μm or less, more preferably 20 μm or less, still more preferably 10 μm or less, still more preferably 5 μm or less, and particularly preferably 1 μm or less. The so-called equivalent diameter of the ball volume refers to the diameter of the ball when the particles of the foreign matter are converted into a ball of the same volume, which can be measured by the laser diffraction method.
本發明之玻璃板用間隔紙之基重較佳為20~100g/m2,更佳為30~90g/m2,進而更佳為40~80g/m2。若未達20g/m2,則難以保持下限耐透氣度(5秒以上),使用後對玻璃板僅抽吸去除玻璃板用間隔紙時,有產生抽吸波及至玻璃板本體之虞。進而,若未達20g/m2,則玻璃板用間隔紙本身之韌性變弱,操作性亦變差,故不佳。又,若基重超過100g/m2,則作為玻璃板用間隔紙之柔度受損,操作性變差。又,玻璃板用間隔紙之使用目的在於,搬運、保管所使用之玻璃板時進行保護,防止損傷、污染,故超出需要地加大基重就成本方面而言不利,作業性亦降低。 The basis weight of the spacer paper for glass plates of the present invention is preferably 20-100 g/m 2 , more preferably 30-90 g/m 2 , and still more preferably 40-80 g/m 2 . If it is less than 20 g/m 2 , it is difficult to maintain the lower limit of air permeability (5 seconds or more). After use, the glass plate may be sucked to remove the spacer paper for the glass plate, and the suction may spread to the glass plate body. Furthermore, if it is less than 20 g/m 2 , the toughness of the spacer paper for glass plates itself becomes weak, and the workability also becomes poor, which is not preferable. In addition, if the basis weight exceeds 100 g/m 2 , the flexibility of the spacer paper for glass plates is impaired, and the workability deteriorates. In addition, the purpose of using spacer paper for glass plates is to protect the glass plates used during transportation and storage to prevent damage and contamination. Therefore, increasing the basis weight beyond necessary is disadvantageous in terms of cost, and workability is also reduced.
本發明之玻璃板用間隔紙之厚度較佳為0.030~0.130mm,更佳為0.040~0.120mm,進而更佳為0.050~0.110mm。若未達0.030mm,則搬運、保管所使用之玻璃板時進行保護之效果減少,故不佳。尤其難以充分發揮作為間隔紙之緩衝功能,又,亦有因厚度過薄而變得容易破損之虞。又,若超過0.130mm,則玻璃板與玻璃板用間隔紙之積層物之厚度增加,故預計會產生保管空間或搬運方面之問題等。 The thickness of the spacer paper for glass plates of the present invention is preferably 0.030 to 0.130 mm, more preferably 0.040 to 0.120 mm, and even more preferably 0.050 to 0.110 mm. If it is less than 0.030mm, the protective effect of the glass plate used during transportation and storage is reduced, which is not good. In particular, it is difficult to fully exert the cushioning function as a spacer, and there is also a risk of being easily damaged due to the thickness being too thin. In addition, if it exceeds 0.130 mm, the thickness of the laminate of the glass plate and the spacer paper for the glass plate will increase, which is expected to cause problems in storage space or transportation.
本發明之玻璃板用間隔紙之含水量較佳為2~10質量%,更佳為3~9質量%,進而更佳為4~8質量%。若含水量未達2質量%,則玻璃板用間隔紙本身易帶靜電,與玻璃板之間會產生由靜電導致之黏連現象,故不佳。又,若含水量超過10質量%,則有由水分過多導致之與玻璃板之黏連現象、或由使用時之水分減少導致之尺寸穩定性變差之虞。 The water content of the spacer paper for glass plates of the present invention is preferably 2-10% by mass, more preferably 3-9% by mass, and still more preferably 4-8% by mass. If the water content is less than 2% by mass, the spacer paper for the glass plate itself is prone to static electricity, and adhesion between the glass plate and the glass plate caused by static electricity will occur, which is not good. In addition, if the water content exceeds 10% by mass, there is a risk of adhesion to the glass plate due to excessive water, or deterioration of dimensional stability due to reduction of water during use.
關於本發明之玻璃板用間隔紙之表面電阻值(依據JIS K 6911 1995年),將該間隔紙於溫度23℃、相對濕度50%之條件下進行24小時以上之調濕後,於相同條件下測定時,較佳為1×108~1×1013Ω之範圍內,更佳為5×108~ 5×1012Ω之範圍內,進而更佳為1×109~1×1012Ω之範圍內。於表面電阻值未達1×108Ω時,玻璃板與間隔紙之密接性降低,故有操作性變差之虞。進而,所謂表面電阻值未達1×108Ω,係指超出需要地添加水分或導電性物質(例如界面活性劑)。過多之水分有對玻璃板用間隔紙之尺寸穩定性造成惡劣影響之可能性,又,導電性物質大多為有機性物質,故有該等物質轉移至接觸之玻璃板表面而引起污染等問題之虞。另一方面,若玻璃板用間隔紙之表面電阻值成為超過1×1013Ω之高電阻值,則易帶靜電,有間隔紙密接於接觸之玻璃板表面而顯著阻礙操作性之虞。作為將表面電阻值調節至所需範圍內之方法,可列舉例如藉由乾燥等而進行水分調整。 Regarding the surface resistance value of the spacer paper for glass plates of the present invention (according to JIS K 6911 1995), the spacer paper is subjected to humidity conditioning for more than 24 hours under the conditions of a temperature of 23°C and a relative humidity of 50%, and then under the same conditions In the next measurement, it is preferably in the range of 1×10 8 to 1×10 13 Ω, more preferably in the range of 5×10 8 to 5×10 12 Ω, and still more preferably 1×10 9 to 1×10 Within the range of 12 Ω. When the surface resistance value is less than 1×10 8 Ω, the adhesion between the glass plate and the spacer paper is reduced, and the workability may deteriorate. Furthermore, the expression that the surface resistance value is less than 1×10 8 Ω means that water or a conductive substance (such as a surfactant) is added more than necessary. Excessive moisture may have a bad influence on the dimensional stability of the spacer paper for glass plates. In addition, most of the conductive materials are organic materials, so these materials are transferred to the surface of the glass plate to cause pollution and other problems. Yu. On the other hand, if the surface resistance value of the spacer paper for glass plates becomes a high resistance value exceeding 1×10 13 Ω, it is easy to be charged with static electricity, and the spacer paper may be in close contact with the surface of the glass plate in contact, which may significantly hinder operability. As a method of adjusting the surface resistance value within a desired range, for example, moisture adjustment by drying or the like can be mentioned.
本發明之玻璃板用間隔紙亦可包含具有200μm以下之纖維長度之短纖維,但該短纖維有牽引出異物之虞,故該短纖維之含量較佳為相對於間隔紙之絕對乾燥質量為4.5重量%以下,更佳為4.0重量%以下,進而更佳為3.5重量%以下,尤佳為3.0重量%以下。此處,所謂「纖維長度」,係指平均纖維長度。因此,對具有200μm以下之纖維長度之短纖維而言,其全部具有200μm以下之纖維長度。換言之,上述短纖維之最大纖維長度為200μm以下。此處,所謂纖維長度,係指將纖維筆直拉伸之狀態之情形下該纖維之長度。 The spacer paper for glass plates of the present invention may also contain short fibers having a fiber length of 200 μm or less, but the short fibers may pull foreign matter out, so the content of the short fibers is preferably relative to the absolute dry mass of the spacer paper It is 4.5% by weight or less, more preferably 4.0% by weight or less, still more preferably 3.5% by weight or less, and particularly preferably 3.0% by weight or less. Here, the "fiber length" refers to the average fiber length. Therefore, for short fibers having a fiber length of 200 μm or less, all of them have a fiber length of 200 μm or less. In other words, the maximum fiber length of the aforementioned short fibers is 200 μm or less. Here, the term "fiber length" refers to the length of the fiber when the fiber is drawn straight.
上述短纖維之平均纖維直徑較佳為10μm~50μm,更佳為12μm~40μm,進而更佳為15μm~30μm。 The average fiber diameter of the aforementioned short fibers is preferably 10 μm to 50 μm, more preferably 12 μm to 40 μm, and even more preferably 15 μm to 30 μm.
再者,此處之「平均纖維直徑」,係指利用電子顯微鏡對玻璃板用間隔紙表面之多個部位放大觀察,自各電子顯微鏡圖像中隨機篩選規定數量之纖維,測定所篩選之該纖維之直徑且將其平均而獲得之平均纖維直徑。篩選之纖維之數量為100以上,較佳為150以上,更佳為200以上,進而更佳為300以上。 Furthermore, the "average fiber diameter" here refers to the magnified observation of multiple parts on the surface of the spacer paper for the glass plate using an electron microscope, and randomly selects a specified number of fibers from each electron microscope image, and determines the selected fibers The average fiber diameter is obtained by averaging it. The number of fibers to be screened is 100 or more, preferably 150 or more, more preferably 200 or more, and even more preferably 300 or more.
本發明之玻璃板用間隔紙表面之上述短纖維的存在量較佳為50根~600根/cm2,更佳為60根~500根/cm2,進而更佳為70根~400根/cm2。若短 纖維的存在量相對較少,則可減少由短纖維牽引出之異物之量。 The amount of short fibers on the surface of the spacer paper for glass plates of the present invention is preferably 50 to 600 fibers/cm 2 , more preferably 60 to 500 fibers/cm 2 , and even more preferably 70 to 400 fibers/cm 2 cm 2 . If the amount of short fibers is relatively small, the amount of foreign matter drawn by the short fibers can be reduced.
於本發明之玻璃板用間隔紙中,一表面之上述短纖維的存在量與另一表面之上述短纖維之差較佳為該另一表面之上述短纖維的存在量之15%以下,更佳為12%以下,進而更佳為10%以下。即,於本發明之玻璃板用間隔紙中,較佳為一表面之短纖維的存在量不會根據另一表面之短纖維的存在量而以成為上述具體範圍內之程度較大地變動。此處,所謂「存在量」,係指間隔紙表面之上述短纖維之數量,例如可藉由利用電子顯微鏡對玻璃板用間隔紙表面之多個部位放大觀察,且將於該部位所觀察之短纖維之數量進行平均而決定。又,藉由自將間隔紙之正面朝下方以片等摩擦規定之面積而落下的纖維中篩選200μm以下之短纖維並獲得每單位面積之數量亦可決定。進而,藉由將間隔紙沿厚度方向之中央分成2個部分而形成非常薄的兩片紙,將各紙漿料化並測定該漿料中200μm以下之短纖維之數量亦可決定。或作為另一方法,將玻璃板用間隔紙之表面利用水充分地清洗,將脫落之纖維供纖維長度測定機測定,藉此亦可決定短纖維的存在量。 In the spacer paper for glass plates of the present invention, the difference between the amount of the short fibers on one surface and the short fibers on the other surface is preferably 15% or less of the amount of the short fibers on the other surface. It is preferably 12% or less, and more preferably 10% or less. That is, in the spacer paper for glass plates of the present invention, it is preferable that the amount of short fibers on one surface does not greatly vary to such an extent that it falls within the above-mentioned specific range according to the amount of short fibers on the other surface. Here, the so-called "existing amount" refers to the number of the aforementioned short fibers on the surface of the spacer paper. For example, it can be observed by magnifying a number of parts on the surface of the spacer paper for glass plates with an electron microscope, and observing that part The number of short fibers is determined by averaging. In addition, it is also possible to select short fibers of 200 μm or less from the fibers that fall down to a predetermined area by rubbing the front side of the spacer paper with a sheet, etc., and obtain the number per unit area. Furthermore, it can be determined by dividing the spacer paper into two parts in the center of the thickness direction to form two very thin paper, pulping each paper and measuring the number of short fibers of 200 μm or less in the slurry. Or as another method, the surface of the spacer paper for glass plates is sufficiently washed with water, and the fallen fibers are measured by a fiber length measuring machine, thereby determining the amount of short fibers.
本發明之玻璃板用間隔紙可基於抄紙法等常用方法而製造。 The spacer paper for glass plates of the present invention can be manufactured based on common methods such as papermaking methods.
本發明之第2態樣係一種製造方法,其係製造玻璃板用間隔紙之方法,至少包含:漿料製備步驟,其製備木漿之漿料;片形成步驟,其將上述漿料形成為片狀;濕紙製備步驟,其將上述片脫水而形成濕紙;及乾燥步驟,其將上述濕紙乾燥而獲得上述間隔紙;且於上述濕紙製備步驟中自片狀漿料之兩面進行脫水。 The second aspect of the present invention is a manufacturing method, which is a method of manufacturing spacer paper for glass plates, at least comprising: a slurry preparation step, which prepares a slurry of wood pulp; and a sheet formation step, which forms the slurry into Sheet form; wet paper preparation step, which dehydrates the above-mentioned sheet to form wet paper; and a drying step, which dries the above-mentioned wet paper to obtain the above-mentioned spacer paper; and in the above-mentioned wet paper preparation step, it is performed from both sides of the sheet-like slurry Dehydrated.
為了使玻璃板用間隔紙表面所存在之莫氏硬度為4以上之異物每1000m2未達10個,其重點在於,作為原料之紙漿、製紙用化學品、填料等製紙 用原材料之研究與管理,及自抄造時原料之製備步驟至後處理步驟之涵蓋全體之一系列步驟管理,尤其較佳為使作為間隔紙原料之木漿不含較多異物。 In order to reduce the number of foreign objects with a Mohs hardness of 4 or higher on the surface of the spacer paper for glass plates to less than 10 per 1,000 m 2 , the focus is on the research and management of paper-making raw materials such as pulp, paper-making chemicals, and fillers as raw materials , And a series of steps management from the preparation step of the raw material during the papermaking to the post-processing step, and it is especially preferable to make the wood pulp as the raw material of the spacer paper free of many foreign substances.
通常,木漿中含有各種異物。可列舉例如來自作為木漿原料之木材之異物、來自紙漿製造時之蒸煮化學品之異物或來自未漂白清洗步驟中使用之化學品之異物、來自廢紙原料之金屬異物、或者來自各步驟中使用之水之異物等。因此,本發明中,較佳為進行作為玻璃板用間隔紙原料之紙漿之清洗及精選,預先自紙漿中儘量去除異物。 Generally, wood pulp contains various foreign substances. For example, foreign matter from wood used as a raw material for wood pulp, foreign matter from cooking chemicals in pulp manufacturing, foreign matter from chemicals used in the unbleached cleaning step, metal foreign matter from waste paper raw materials, or foreign matter from various steps Foreign matter in the water used. Therefore, in the present invention, it is preferable to clean and select the pulp that is a raw material of spacer paper for glass plates, and to remove foreign matter from the pulp as much as possible in advance.
一般而言,於紙漿製造之步驟中,對將木材碎片蒸煮所獲得之紙漿進行脫木質素處理後,會清洗紙漿,進而加以漂白。因此,較佳為首先於木材碎片之階段進行碎片之異物去除及清洗。例如較佳為於碎片洗滌器等公知之異物去除系統中去除金屬、砂等異物。又,於紙漿製造步驟中,蒸煮後清洗之目的在於,去除殘存於紙漿液中之蒸煮藥液、木質素分解物、有色成分,但同時亦能夠去除異物。例如可採用使用有真空式洗濾器、加壓轉筒式洗濾器、加壓型清洗機及擴散清洗機等各種清洗裝置之對流清洗方式等公知之方法。為了去除異物從而提高紙漿之清潔度,尤佳為使所使用之清洗水之量增加,或採用具有2級以上漂洗級數之多級清洗方式。再者,作為清洗時所使用之界面活性劑、pH調整劑、間距控制劑、螯合劑、消泡劑等化學品,更佳為不使用會導致異物之物質。例如,用作消泡劑之礦物油系消泡劑可能成為玻璃板用間隔紙之礦物系異物之原因,故較佳為抑制礦物油系消泡劑之使用量,或以其他消泡劑代替使用。 Generally speaking, in the pulp manufacturing process, after the pulp obtained by cooking wood chips is delignified, the pulp is washed and then bleached. Therefore, it is better to first remove and clean the debris from the wood debris. For example, it is preferable to remove foreign matter such as metal and sand in a known foreign matter removal system such as a debris scrubber. In addition, in the pulp manufacturing step, the purpose of cleaning after cooking is to remove the cooking liquid, lignin decomposition products, and colored components remaining in the pulp liquid, but it can also remove foreign matter at the same time. For example, well-known methods such as a convection cleaning method using various cleaning devices such as a vacuum filter, a pressurized drum filter, a pressure cleaning machine, and a diffusion cleaning machine can be used. In order to remove foreign matter and improve the cleanliness of the pulp, it is particularly preferable to increase the amount of washing water used, or to adopt a multi-stage washing method with more than 2 rinsing stages. Furthermore, as chemicals used in cleaning such as surfactants, pH adjusters, spacing control agents, chelating agents, defoamers, etc., it is better not to use substances that can cause foreign matter. For example, mineral oil-based defoamers used as defoamers may cause mineral foreign matter in spacer paper for glass sheets. Therefore, it is better to suppress the use of mineral oil-based defoamers or substitute other defoamers. use.
於上述清洗步驟之後具有漂白步驟,此處較佳亦為儘量去除異物。例如,可列舉對每級漂白均設置清洗裝置。此處亦可使用公知之清洗機,例如可使用高壓擴散器、擴散洗滌機、加壓型轉筒洗滌器、水平長網式洗滌器、加壓清洗機等。尤其是藉由使用多個上述清洗機可高度地去除各種異物。再者, 清洗水中亦可添加鹼、酸、螯合劑、界面活性劑、消泡劑等化學品,較佳為不使用會導致異物之化學品。又,較佳為於各步驟間亦採取防止異物混入之策略。又,更佳為組合使用下述鐵成分之去除方法。 There is a bleaching step after the above-mentioned cleaning step, and it is preferable to remove foreign matter as much as possible here. For example, a cleaning device is provided for each stage of bleaching. A well-known washing machine can also be used here, for example, a high-pressure diffuser, a diffusion washing machine, a pressure drum washing machine, a horizontal fourdrinier washing machine, a pressure washing machine, etc. can be used. Especially by using a plurality of the above-mentioned washing machines, various foreign substances can be highly removed. Furthermore, chemicals such as alkalis, acids, chelating agents, surfactants, defoamers, etc. can also be added to the washing water, and it is preferable not to use chemicals that can cause foreign matter. In addition, it is preferable to adopt a strategy to prevent foreign matter from being mixed between steps. Moreover, it is more preferable to use the following iron component removal method in combination.
於本發明中將廢紙漿用作原料之情形時,較佳為於廢紙漿製造步驟中,利用打漿機、篩、清潔器等高水準地去除異物。 When waste paper pulp is used as a raw material in the present invention, it is preferable to use a beater, a sieve, a cleaner, etc. to remove foreign matter at a high level in the waste paper pulp manufacturing step.
於上述漿料製備步驟中,可利用先前公知之方法製備木漿之漿料。例如,於上述漿料製備步驟中,使構成木漿之纖維素纖維解聚並將其作為水性懸濁液而製備漿料。 In the above slurry preparation step, a previously known method can be used to prepare wood pulp slurry. For example, in the aforementioned slurry preparation step, the cellulose fibers constituting the wood pulp are depolymerized and used as an aqueous suspension to prepare the slurry.
又,於不損及本發明之性能之範圍內,可視需要對上述漿料添加接著劑、防黴劑、消泡劑、填料、濕潤紙力增強劑、乾燥紙力增強劑、上漿劑、著色劑、定著劑、良率提昇劑、黏質控制劑等。再者,於該等化學品添加時需細心注意,以免蟲、污物等混入。 In addition, within the range that does not impair the performance of the present invention, adhesives, anti-mold agents, defoamers, fillers, wet paper strength enhancers, dry paper strength enhancers, sizing agents, Coloring agent, fixing agent, yield enhancer, viscosity control agent, etc. Furthermore, care should be taken when adding these chemicals to prevent insects, dirt, etc. from being mixed in.
於製備上述漿料時,若進行木漿之打漿則可期待紙層間強度增加之效果。然而,若藉由進行打漿而使微細纖維增加,則有產生以下不良之虞,即,牽引出異物,或作為間隔紙於使用中產生紙粉等,故超出需要地提高打漿度並不佳。本發明中較佳之打漿度為300~650mlc.s.f.。 When preparing the above-mentioned slurry, if wood pulp beating is performed, the effect of increasing the strength between paper layers can be expected. However, if the fine fibers are increased by beating, the following problems may occur, that is, foreign matter is pulled out, or paper dust is generated during use as a spacer paper, so it is not good to increase the beating degree more than necessary. The preferred beating degree in the present invention is 300~650mlc.s.f.
於將上述漿料形成為片狀之片形成步驟中,可利用先前公知之方法進行片化。例如,藉由將上述漿料吐出至平面狀之絲上(例如,長網式抄紙機)、或利用捲繞成圓筒狀筒之絲自漿料撈取片(例如,圓網式抄紙機)可獲得片。 In the sheet forming step of forming the above-mentioned slurry into a sheet shape, a previously known method can be used for sheet formation. For example, by spitting out the above-mentioned slurry onto a flat wire (for example, a Fourdrinier paper machine), or using a wire wound into a cylindrical tube to take a sheet from the slurry (for example, a cylinder paper machine) Available films.
此外,作為間隔紙中混入異物之可能性,亦可列舉於抄紙步驟中之混入。例如,可列舉混入至製紙用化學品之情形、或各種裝置之原材料脫落而混入紙之情形等。作為此種抄紙步驟之異物去除方法,可使用清潔器或篩裝置等除塵裝置及其他清洗裝置。於本發明中,該等去除方法可使用公知之裝置, 例如可使用離心清潔器、特重量清潔器、中濃度清潔器、輕量清潔器、多孔篩、狹縫篩、振動篩、平面篩、及其他清洗機等。又,異物亦有自紙料或白水之配管內混入之可能性,故將配管等始終保持清潔為佳。 In addition, as the possibility of foreign matter being mixed in the spacer paper, mixing in the papermaking step can also be cited. For example, the case where it is mixed into paper-making chemicals, or the case where the raw materials of various devices fall off and mixed into paper, etc. are mentioned. As a method for removing foreign matter in this papermaking step, dust removal devices such as cleaners or screen devices and other cleaning devices can be used. In the present invention, such removal methods can use well-known devices, such as centrifugal cleaners, special weight cleaners, medium concentration cleaners, lightweight cleaners, porous screens, slit screens, vibrating screens, flat screens, And other washing machines. In addition, foreign matter may be mixed into the pipes of paper or white water, so it is better to keep the pipes clean at all times.
再者,關於導致異物之原因之一的鐵成分,因摩擦或腐蝕而使鐵粉或鐵銹自紙漿製造裝置或抄紙機之配管等混入並氧化,藉此成為莫氏硬度較高之氧化鐵,故較佳為選擇性去除鐵成分。例如,較佳為使各設備採用由鐵以外之素材所構成者,或於系統內設置磁鐵等高磁性體而選擇性去除鐵成分,或將選擇性吸附鐵之吸附材配置於上述各設備之出口側。由高磁性體設置而進行選擇性去除之方法不僅能夠去除鐵,亦能夠去除其他磁性體。 Furthermore, with regard to the iron component that is one of the causes of foreign matter, iron powder or rust is mixed and oxidized from the pulp manufacturing equipment or paper machine piping due to friction or corrosion, thereby becoming iron oxide with high Mohs hardness. Therefore, it is preferable to selectively remove the iron component. For example, it is preferable to use a material other than iron for each device, or install a high-magnetic material such as a magnet in the system to selectively remove the iron component, or arrange an adsorption material that selectively adsorbs iron in the above-mentioned devices. Exit side. The method of selective removal by high-magnetic material can not only remove iron, but also other magnetic materials.
如此,例如藉由將異物較少之木漿用作原料,又認真地實施抄紙步驟中之異物去除,可製造玻璃板用間隔紙之表面所存在之莫氏硬度為4以上之異物每1000m2未達10個之玻璃板用間隔紙。 In this way, for example, by using wood pulp with less foreign matter as a raw material, and carefully removing foreign matter in the papermaking step, it is possible to produce foreign matter with a Mohs hardness of 4 or higher on the surface of spacer paper for glass plates per 1000 m 2 Spacer paper for glass plates less than 10 pieces.
本發明之第2態樣中,於將上述片脫水而形成濕紙之濕紙製備步驟中自片之兩面進行脫水。藉此,可自片之兩面有效地去除上述片中包含之莫氏硬度為4以上之異物。因此,可使一表面上之莫氏硬度為4以上之異物的存在比例與另一表面上之莫氏硬度為4以上之異物的存在比例之差係每1000m2為4個以內。 In the second aspect of the present invention, in the wet paper preparation step of dehydrating the above-mentioned sheet to form a wet paper, dehydration is performed from both sides of the sheet. Thereby, foreign matter with Mohs hardness of 4 or more contained in the above-mentioned sheet can be effectively removed from both sides of the sheet. Therefore, the difference between the proportion of foreign substances with a Mohs hardness of 4 or higher on one surface and the proportion of foreign substances with a Mohs hardness of 4 or higher on the other surface can be within 4 per 1000 m 2 .
上述脫水之方法為任意,可使用先前公知之方法。例如,可藉由利用滾筒對上述片進行加壓而實施脫水。然而,為了有效地去除莫氏硬度為4以上之異物,較佳為藉由抽吸進行上述脫水。 The above-mentioned dehydration method is arbitrary, and previously known methods can be used. For example, dehydration can be performed by pressing the sheet with a roller. However, in order to effectively remove foreign matter with a Mohs hardness of 4 or more, it is preferable to perform the above-mentioned dehydration by suction.
自片之兩面進行脫水之步驟例如亦可為於利用網將於水平方向延伸之片自上下夾住之狀態下,藉由抽吸裝置於上下方向抽吸片而進行脫水,但由於重力之影響,朝上方向之抽吸力與朝下方向之抽吸力會產生差異,從而有於被朝上方向抽吸之側的片表面相較於被朝下方向抽吸之側的片表面進而殘 存莫氏硬度為4以上之異物之虞,故較佳為利用網將於鉛直方向延伸之片夾住並朝左右方向抽吸片而進行脫水。該情形時,較佳為將上述濕紙之移動方向維持為鉛直方向或自鉛直方向起30°以內之傾斜範圍。 The step of dehydrating from both sides of the sheet can also be dehydrated by sucking the sheet up and down by a suction device in a state where the sheet extending in the horizontal direction is clamped from top to bottom with a net, but due to the influence of gravity , There will be a difference between the suction force in the upward direction and the suction force in the downward direction, so that the surface of the sheet on the side that is sucked in the upward direction remains compared to the surface of the sheet on the side that is sucked in the downward direction. Since there is a risk of foreign matter with a Mohs hardness of 4 or more, it is preferable to use a net to sandwich the sheet extending in the vertical direction and to suck the sheet in the left and right directions for dehydration. In this case, it is preferable to maintain the moving direction of the wet paper in the vertical direction or a tilt range within 30° from the vertical direction.
較佳為上述片之一表面之上述抽吸的脫水比例(脫水率)與另一表面之上述抽吸的脫水比例(脫水率)之差為該另一表面之上述抽吸的脫水比例(脫水率)之10%以下。即,於本發明之玻璃板用間隔紙之製造方法中,較佳為以大致相同之抽吸力實施自片兩面進行之抽吸。 Preferably, the difference between the dehydration ratio (dehydration rate) of the suction on one surface of the sheet and the dehydration ratio (dehydration rate) of the suction on the other surface is the dehydration ratio of the suction on the other surface (dehydration rate) Rate) below 10%. That is, in the manufacturing method of the spacer paper for glass plates of the present invention, it is preferable to perform suction from both sides of the sheet with substantially the same suction force.
上述片形成步驟及濕紙製備步驟可使用不同之裝置個別地進行,亦可於同一裝置中連續地或部分重疊地實施。例如,亦可於抄紙機之網部,同時將漿料載置於絲(網)並加以片化,並進行脫水而形成濕紙。 The above-mentioned sheet forming step and wet paper preparation step may be performed individually using different devices, or may be performed continuously or partially overlapping in the same device. For example, it is also possible to place the slurry on the wire (mesh) at the same time in the wire part of the paper machine, to sheet it, and to dewater it to form a wet paper.
上述乾燥步驟中,可藉由使用乾燥滾筒等之先前公知之方法,將濕紙乾燥而獲得上述間隔紙。 In the drying step, the spacer paper can be obtained by drying the wet paper by a previously known method using a drying drum or the like.
為了進而去除可能殘存於間隔紙表面之莫氏硬度為4以上之異物,於本發明之玻璃板用間隔紙之製造方法中,較佳為包含對上述乾燥步驟後之間隔紙之兩面進一步進行抽吸之追加抽吸步驟。 In order to further remove foreign matter that may remain on the surface of the spacer paper with a Mohs hardness of 4 or higher, the method for manufacturing spacer paper for glass plates of the present invention preferably includes further extracting both sides of the spacer paper after the drying step. Suction is an additional suction step.
再者,於玻璃板用間隔紙之抄紙之途中及/或抄紙後,亦可進行壓光處理、超級壓光處理、軟壓光處理、壓紋等加工。藉由加工處理,可調整表面性、厚度。 Furthermore, during and/or after papermaking of spacer paper for glass plates, calendering treatment, super calendering treatment, soft calendering treatment, embossing, etc. can also be processed. Through processing, the surface and thickness can be adjusted.
藉由本發明之第2態樣之製造方法,可有效地製造本發明之第1態樣之玻璃板用間隔紙。 By the manufacturing method of the second aspect of the present invention, the spacer paper for glass plates of the first aspect of the present invention can be efficiently manufactured.
本發明之玻璃板用間隔紙可插入玻璃板之間而使用。例如,較典型為將上述玻璃板用間隔紙逐片插入多個玻璃板之間,整體形成積層體,而將該積層體作為保管、搬運之對象。又,亦可使用本發明之玻璃板用間隔紙包裝玻璃板單體或上述積層體。因此,本發明具有玻璃板之保護方法之態樣,該保 護方法包含將上述玻璃板用間隔紙配置(尤其是插入)於玻璃板間之步驟。 The spacer paper for glass plates of the present invention can be inserted between glass plates and used. For example, it is more typical to insert the above-mentioned spacer paper for glass plates one by one between a plurality of glass plates to form a laminate as a whole, and use the laminate as an object for storage and transportation. Moreover, you may use the spacer paper for glass plates of this invention to package a single glass plate or the said laminated body. Therefore, the present invention has an aspect of a method for protecting a glass plate, which includes a step of arranging (especially inserting) spacer paper for the glass plate between the glass plates.
作為玻璃板並無特別限定,較佳為電漿顯示面板、液晶顯示面板(尤其是TFT液晶顯示面板)、有機EL顯示面板等平板顯示器用玻璃板。於平板顯示器用玻璃板之表面會形成微細之電極、間隔壁等,但藉由使用本發明之玻璃板用間隔紙,可抑制甚至避免玻璃板破裂或損傷之問題、以及異物向玻璃板轉移之問題,故即便於玻璃板之表面形成有微細之電極、間隔壁等,亦可抑制甚至避免由該異物導致之不良,結果可抑制甚至避免顯示器之缺陷。 The glass plate is not particularly limited, but a glass plate for flat panel displays such as plasma display panels, liquid crystal display panels (especially TFT liquid crystal display panels), and organic EL display panels are preferred. Fine electrodes, partition walls, etc. are formed on the surface of the glass plate for flat panel displays. However, by using the spacer paper for glass plates of the present invention, the problem of breakage or damage of the glass plate and the transfer of foreign matter to the glass plate can be suppressed or even avoided. The problem is that even if fine electrodes, partitions, etc. are formed on the surface of the glass plate, the defects caused by the foreign matter can be suppressed or even avoided, and as a result, the defects of the display can be suppressed or even avoided.
伴隨於顯示器之大型化,平板顯示器用玻璃板之尺寸及重量增大,但本發明之玻璃板用間隔紙尤其可良好地保護此種大型或大重量之玻璃板之表面。尤其是本發明之玻璃板用間隔紙中,莫氏硬度為4以上之異物之含量極少,故即便被大重量之玻璃板擠壓,亦可減少甚至避免玻璃板表面產生破裂或損傷,又,可抑制甚至避免異物轉移至玻璃板表面。因此,本發明之玻璃板用間隔紙可較佳地用於特別要求表面清潔性之平板顯示器用玻璃板。 Along with the enlargement of displays, the size and weight of glass plates for flat panel displays have increased, but the spacer paper for glass plates of the present invention can particularly well protect the surface of such large or heavy glass plates. In particular, in the spacer paper for glass plates of the present invention, the content of foreign matter with a Mohs hardness of 4 or more is extremely small, so even if it is squeezed by a heavy glass plate, it can reduce or even avoid cracking or damage on the surface of the glass plate. It can prevent or even prevent the transfer of foreign matter to the surface of the glass plate. Therefore, the spacer paper for glass plates of the present invention can be preferably used for glass plates for flat panel displays that particularly require surface cleanability.
並,本發明之玻璃板用間隔紙可抑制該間隔紙之正面及背面之莫氏硬度為4以上之異物的存在比例之不同,故使正面及背面之任一者皆可與玻璃板接觸。因此,本發明之玻璃板用間隔紙之操作性優異。例如,無需將兩片間隔紙夾入玻璃板之間並使各間隔紙之表面中異物存在量較少之一個表面朝向玻璃板。又,即便成為卷取成輥狀之狀態,亦無需擔心由莫氏硬度為4以上之異物自間隔紙之一表面轉移至另一表面所引起的間隔紙表面之清潔性降低。 In addition, the spacer paper for glass plates of the present invention can suppress the difference in the existence ratio of foreign matter having a Mohs hardness of 4 or more between the front and back of the spacer paper, so that either the front and the back can contact the glass plate. Therefore, the spacer paper for glass plates of the present invention has excellent operability. For example, it is not necessary to sandwich two pieces of spacer paper between the glass plates and make the surface of each spacer paper which has a smaller amount of foreign matter facing the glass plate. Moreover, even if it is wound into a roll shape, there is no need to worry about the deterioration of the surface cleanliness of the spacer paper caused by the transfer of foreign matter with a Mohs hardness of 4 or more from one surface of the spacer paper to the other surface.
以下,使用實施例及比較例更具體地說明本發明,但本發明之範圍並非受限於實施例。 Hereinafter, examples and comparative examples are used to explain the present invention more specifically, but the scope of the present invention is not limited to the examples.
[木漿之製造] [Manufacture of wood pulp]
由蒸煮步驟、清洗步驟、脫氧木質素反應步驟、利用二氧化氯及過氧化氫 進行之多段漂白步驟所構成之針葉樹漂白牛皮紙漿之製造裝置中,於多段漂白步驟後之紙漿輸送線上,設置了排列有多個10000高斯磁棒之金屬去除裝置,將紙漿漿料中存在之鐵成分等金屬異物去除。藉由以上步驟而獲得針葉樹漂白牛皮紙漿A。 In the conifer bleached kraft pulp manufacturing device composed of a cooking step, a cleaning step, a deoxylignin reaction step, and a multi-stage bleaching step using chlorine dioxide and hydrogen peroxide, the pulp conveying line after the multi-stage bleaching step is installed A metal removal device with multiple 10,000 Gauss magnetic rods arranged to remove metal foreign matter such as iron components in the pulp slurry. Through the above steps, a conifer bleached kraft pulp A is obtained.
另一方面,採用除了不使用配置有上述磁棒之直列式盒以外,其他與上述相同之方式,獲得針葉樹漂白牛皮紙漿B。 On the other hand, except that the in-line box equipped with the above-mentioned magnetic rods is not used, the other methods are the same as the above, to obtain the conifer bleached kraft pulp B.
[實施例1] [Example 1]
作為木漿,準備80質量份針葉樹漂白牛皮紙漿A及20質量份針葉樹漂白牛皮紙漿B,於將其解聚而製備成打漿度達520mlc.s.f.之漿料中,添加相對於紙漿總質量為0.4質量份之聚丙烯醯胺(商品名:Polystron1254,荒川化學工業公司製造)作為紙力增強劑,從而製備出濃度為0.4重量%之紙漿漿料。使用於網部具備疊網成形機(on top former)之長網式抄紙機對其進行抄紙,並藉由疊網成形機自濕紙之兩面進行脫水,從而獲得基重為55g/m2之玻璃板用間隔紙。 As wood pulp, 80 parts by mass of conifer bleached kraft pulp A and 20 parts by mass of conifer bleached kraft pulp B were prepared, and the pulp was depolymerized to prepare a pulp with a beating degree of 520 mlc.sf. The addition was 0.4 relative to the total mass of the pulp. Part by mass of polypropylene amide (trade name: Polystron 1254, manufactured by Arakawa Chemical Industry Co., Ltd.) was used as a paper strength enhancer to prepare a pulp slurry with a concentration of 0.4% by weight. Use a Fourdrinier paper machine equipped with an on top former in the wire section to make paper, and use the on top former to dehydrate both sides of the wet paper to obtain a basis weight of 55g/m 2 Spacer paper for glass plates.
[實施例2] [Example 2]
採用除了添加0.7質量份聚丙烯醯胺以外,其他與實施例1相同之方法,獲得基重為55g/m2之玻璃板用間隔紙。 A spacer paper for glass plates having a basis weight of 55 g/m 2 was obtained by the same method as in Example 1 except for adding 0.7 parts by mass of polypropylene amide.
[比較例1] [Comparative Example 1]
採用除了不使用疊網成形機以外,其他與實施例1相同之方法,獲得基重為55g/m2之玻璃板用間隔紙。 A spacer paper for glass plates with a basis weight of 55 g/m 2 was obtained by the same method as in Example 1 except that the laminating machine was not used.
[比較例2] [Comparative Example 2]
採用除了使用50質量份針葉樹漂白牛皮紙漿A、及50質量份針葉樹漂白牛皮紙漿B以外,其他與實施例1相同之方法,獲得基重為55g/m2之玻璃板用間隔紙。 Except that 50 parts by mass of coniferous bleached kraft pulp A and 50 parts by mass of coniferous bleached kraft pulp B were used, the other methods were the same as in Example 1, to obtain spacer paper for glass plates with a basis weight of 55 g/m 2 .
[莫氏硬度為4以上之異物之測定] [Measurement of foreign matter with Mohs hardness of 4 or more]
利用100倍實體顯微鏡觀察實施例1、實施例2、比較例1及比較例2之玻璃板 用間隔紙之正面及背面而特定出各面上之異物。進而,使用X射線繞射顯微鏡特定出該異物之材質。對上述異物中之由莫氏硬度為4以上之材質所構成者特定出個數,並換算成每1000m2多少個。 The front and back surfaces of the spacer paper for glass plates of Example 1, Example 2, Comparative Example 1, and Comparative Example 2 were observed with a 100-fold stereo microscope to identify foreign matter on each surface. Furthermore, an X-ray diffraction microscope was used to identify the material of the foreign matter. Specify the number of the above-mentioned foreign objects made of materials with a Mohs hardness of 4 or more, and convert them to how many per 1000m 2 .
於實施例1、實施例2、比較例1及比較例2之玻璃板用間隔紙之正面及背面,莫氏硬度為4以上之異物的存在比例如下。實施例1中,正面為5個/1000m2,背面為1個/1000m2。實施例2中,正面為9個/1000m2,背面為5個/1000m2。比較例1中,正面為13個/1000m2,背面為6個/1000m2。比較例2中,正面為7個/1000m2,背面為2個/1000m2。 On the front and back surfaces of the spacer paper for glass plates of Example 1, Example 2, Comparative Example 1, and Comparative Example 2, the existence ratio of foreign matter with a Mohs hardness of 4 or more is as follows. In Example 1, the front side is 5 pieces/1000m 2 , and the back side is 1 piece/1000m 2 . In Example 2, the front side is 9 pieces/1000m 2 and the back side is 5 pieces/1000m 2 . In Comparative Example 1, the front surface was 13 pieces/1000 m 2 , and the back surface was 6 pieces/1000 m 2 . In Comparative Example 2, the front surface is 7 pieces/1000m 2 , and the back surface is 2 pieces/1000m 2 .
[輸送測試] [Transportation test]
於形成75度角度之鋁製L字架台上之玻璃載置面鋪上發泡聚胺酯(polyurethane),朝向用以將玻璃板於垂直方向載置之載置面、及自載置面之後端部沿垂直方向延伸之靠背面,向120片尺寸為680mm×880mm×0.7mm之玻璃板與各玻璃板之間插入玻璃板用間隔紙,並將其以與靠背面平行之方式豎立,將固定於架台之帶狀之傳送帶自後端部朝靠背面遍及全周架設而將玻璃板固定。為了防止來自外部之灰塵或污物等混入,將如上所述設置之架台整面以包裝材料被覆。其後,實施於軌道上之輸送測試。輸送測試條件為,於輸送距離為1000km(輸送途中,於40℃×95%RH之環境下保管5天)實施測試。對實施例1、實施例2、比較例1及比較例2之玻璃板用間隔紙進行上述輸送測試。於上述輸送測試中,使用與實施例1及實施例2之間隔紙接觸之玻璃板形成液晶面板之陣列時,使該間隔紙之正面及背面之任一者與玻璃板接觸之情形時均未見彩色膜之斷線。另一方面,於上述輸送測試中,使用與比較例2之玻璃板用間隔紙接觸之玻璃板形成液晶面板之陣列時,使用與該間隔紙之背面接觸之玻璃板之情形時未見彩色膜之斷線,但使用與該間隔紙之正面接觸之玻璃板之情形時見到彩色膜之斷線。另一方面,於上述輸送測試中,使用與比較例1之玻璃板用間 隔紙接觸之玻璃板形成液晶面板之陣列時,該間隔紙之正面及背面之任一者與玻璃板接觸之情形時均見到彩色膜之斷線。 Spread foamed polyurethane on the glass mounting surface on the aluminum L-shaped stand that forms an angle of 75 degrees, facing the mounting surface for placing the glass plate in the vertical direction and the rear end of the mounting surface On the back side extending in the vertical direction, insert spacer paper for the glass plate between 120 glass plates with a size of 680mm×880mm×0.7mm and each glass plate, and erect it parallel to the back side, and fix it on The belt-shaped conveyor belt of the stand is erected from the rear end to the back side all the way to fix the glass plate. In order to prevent dust and dirt from entering, the entire surface of the stand set as described above is covered with packaging materials. After that, a transport test on the track was implemented. The transportation test condition is that the transportation distance is 1000km (during transportation, it is stored in an environment of 40℃×95%RH for 5 days). The above-mentioned conveyance test was performed on the spacer paper for glass plates of Example 1, Example 2, Comparative Example 1, and Comparative Example 2. In the above-mentioned transport test, when the glass plate in contact with the spacer paper of Example 1 and Example 2 is used to form an array of liquid crystal panels, there is no situation when either of the front and back of the spacer paper is in contact with the glass plate. See broken thread of color film. On the other hand, in the above-mentioned transport test, when the glass plate in contact with the spacer paper for the glass plate of Comparative Example 2 was used to form an array of liquid crystal panels, no color film was seen when the glass plate in contact with the back of the spacer paper was used. However, when using the glass plate in contact with the front surface of the spacer, the color film is broken. On the other hand, in the above-mentioned transport test, when the glass plate contacted with the spacer paper for the glass plate of Comparative Example 1 is used to form an array of liquid crystal panels, when either the front or back of the spacer paper is in contact with the glass plate Disconnection of the color film was seen.
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