JP2016056090A - Slip sheet for glass sheet - Google Patents
Slip sheet for glass sheet Download PDFInfo
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- JP2016056090A JP2016056090A JP2015179978A JP2015179978A JP2016056090A JP 2016056090 A JP2016056090 A JP 2016056090A JP 2015179978 A JP2015179978 A JP 2015179978A JP 2015179978 A JP2015179978 A JP 2015179978A JP 2016056090 A JP2016056090 A JP 2016056090A
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- glass
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- aluminum
- paper
- glass plate
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- 239000011521 glass Substances 0.000 title claims abstract description 148
- 238000003809 water extraction Methods 0.000 claims abstract description 25
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 34
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 23
- 239000000126 substance Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 15
- 239000006185 dispersion Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 7
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 229920000875 Dissolving pulp Polymers 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000011109 contamination Methods 0.000 abstract description 7
- 239000000758 substrate Substances 0.000 abstract description 7
- 230000003749 cleanliness Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 62
- 239000010408 film Substances 0.000 description 12
- 229910010272 inorganic material Inorganic materials 0.000 description 8
- 239000011147 inorganic material Substances 0.000 description 8
- 229920001131 Pulp (paper) Polymers 0.000 description 7
- 239000013055 pulp slurry Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 5
- 238000010009 beating Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 239000002655 kraft paper Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000011122 softwood Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003490 calendering Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000003623 enhancer Substances 0.000 description 3
- 229910003480 inorganic solid Inorganic materials 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- -1 aluminum ions Chemical class 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
Description
本発明は、液晶パネルディスプレイ、プラズマディスプレイパネル、有機エレクトロルミネッセンス（有機ＥＬ）ディスプレイ等のフラットパネル・ディスプレイ用のガラス板を複数枚積層して保管、運搬する流通過程において、硝子板を包装する紙、及び、ガラス板の間に挟み込む紙に関するものである。 The present invention relates to a paper for wrapping a glass plate in a distribution process in which a plurality of glass plates for flat panel displays such as liquid crystal panel displays, plasma display panels, and organic electroluminescence (organic EL) displays are stacked and stored and transported. And paper sandwiched between glass plates.
一般に、フラットパネル・ディスプレイ用のガラス板を複数枚積層して保管する過程、トラック等で運搬する流通過程等において、ガラス板同士が衝撃を受けて接触し、擦れ傷が発生し、また、ガラス表面が汚染するのを防止する目的でガラス板の間に合紙を挟み込むことが行われている。 In general, in the process of laminating and storing a plurality of glass panels for flat panel displays, the distribution process of transporting them by trucks, etc., the glass sheets are subjected to impacts and come into contact with each other. In order to prevent the surface from being contaminated, a slip sheet is sandwiched between glass plates.
フラットパネル・ディスプレイ用のガラス板は、一般の建築用窓ガラス板、車両用窓ガラス等に比べて、高精細ディスプレイに使用されることから、ガラス表面は紙表面に含まれる不純物が極力無いクリーンな表面を保持していること、また、高速応答性や視野角拡大のために平坦度に優れていることが求められる。 Glass plates for flat panel displays are used for high-definition displays compared to general architectural window glass plates, vehicle window glasses, etc., so the glass surface is clean with as little impurities as possible on the paper surface. It is required to have a smooth surface and to have excellent flatness for high-speed response and widening of the viewing angle.
このような用途使用される合紙としては、ガラス板の割れや表面の傷つきを防止できる合紙、また、ガラス表面を汚染しない合紙がすでにいくつか提案されている。例えば、特許文献１には、合紙の表面にフッ素コーティング皮膜を形成する手法が開示されている。また、特許文献２には、ポリエチレン系樹脂製発泡シートとポリエチレン系樹脂製フィルムが貼合された合紙が、特許文献３には、さらしケミカルパルプ５０質量％以上を含有するパルプからなる紙であって、特定のアルキレンオキサイド付加物や水可溶性ポリエーテル変性シリコーンを含有するガラス用合紙が、そして、特許文献４には、紙中の樹脂分の量を規定し、ガラス表面の汚染に考慮した原料を使用したガラス合紙がそれぞれ開示されている。 As interleaving papers used for such purposes, several interleaving papers that can prevent breakage of the glass plate and scratches on the surface, and interleaving papers that do not contaminate the glass surface have already been proposed. For example, Patent Document 1 discloses a technique for forming a fluorine coating film on the surface of a slip sheet. Further, Patent Document 2 includes a paper sheet in which a polyethylene resin foam sheet and a polyethylene resin film are bonded, and Patent Document 3 includes a paper made of pulp containing 50 mass% or more of exposed chemical pulp. In addition, there is a paper for glass containing a specific alkylene oxide adduct and water-soluble polyether-modified silicone, and Patent Document 4 defines the amount of resin in the paper and considers contamination of the glass surface. Glass interleaving paper using the prepared raw materials is disclosed.
しかし、これらの合紙によってフラットパネル・ディスプレイ用のガラス板表面の汚染を完全に防げるわけではなく、場合によっては、何らかの原因によるガラス板表面の汚染のため、ガラス板の欠陥率が上昇することがあるのが実状である。 However, these slip sheets do not completely prevent contamination of the glass plate surface for flat panel displays. In some cases, the glass plate surface contamination for some reason increases the defect rate of the glass plate. There is a real situation.
特に最近は採算性の観点から、フラットパネル・ディスプレイ等の製造工程において高い歩留まりが求められ、フラットパネル・ディスプレイ用に使用されるガラス板表面の汚染をいかに防止するかが重要である。 In recent years, in particular, from the viewpoint of profitability, a high yield is required in the manufacturing process of flat panel displays and the like, and it is important how to prevent contamination of the surface of glass plates used for flat panel displays.
本発明は、高い清浄度及び傷品位が要求されるフラットパネル・ディスプレイ用の基板材料として用いられるガラス板向けの、当該ガラスの表面の汚染を格段に防止可能な合紙を提供することを課題とする。 It is an object of the present invention to provide a slip sheet for a glass plate used as a substrate material for a flat panel display, which requires high cleanliness and scratch quality, and can significantly prevent contamination of the glass surface. And
例えばＴＦＴ液晶ディスプレイの製造工程の一つであるアレイ工程のカラーフィルター基板作製時に、ガラス板表面が汚染されている場合、断線等の問題が生じることが知られている。カラーフィルター基板は、ガラス板に半導体膜、ＩＴＯ膜（透明導電膜）、絶縁膜、アルミ金属膜等の薄膜をスパッタリングや真空蒸着法等で形成して作製されるが、ガラス板表面に汚染物質が存在すると薄膜から形成した回路パターンに断線が生じたり、絶縁膜の欠陥による短絡が生じるからである。また、カラーフィルター基板の作製において、ガラス板にフォトリソグラフィによるパターンを形成するが、この工程でレジスト塗布時のガラス板面に汚染物質が存在すると、露光や現像後のレジスト膜にピンホールが生じ、その結果断線や短絡が生じる。同様の問題が有機ＥＬディスプレイの製造でも確認されている。有機ＥＬディスプレイはガラス基板にＩＴＯ陽極、有機発光層、陰極等の薄膜をスパッタリングや蒸着や印刷等で形成して作製されるため、ガラス基板表面に薄膜を阻害する異物が存在すると非発光となる問題が生じる。このようなガラス板の汚染原因は特定が困難であったが、その原因の一つがガラス板用合紙に含まれる固形異物であり、特にその固形異物がアルミニウム系無機物であることが本発明者らの検証によって判明した。 For example, it is known that problems such as disconnection may occur when the surface of a glass plate is contaminated during the production of a color filter substrate in an array process, which is one of the manufacturing processes of a TFT liquid crystal display. The color filter substrate is made by forming a thin film such as a semiconductor film, ITO film (transparent conductive film), insulating film, aluminum metal film, etc. on a glass plate by sputtering or vacuum evaporation, but it is a contaminant on the glass plate surface. This is because a circuit pattern formed from a thin film is disconnected or a short circuit occurs due to a defect in the insulating film. In the production of a color filter substrate, a photolithography pattern is formed on a glass plate. If contaminants are present on the glass plate surface during resist coating in this process, pinholes are generated in the resist film after exposure and development. As a result, disconnection or short circuit occurs. Similar problems have been confirmed in the manufacture of organic EL displays. An organic EL display is manufactured by forming a thin film such as an ITO anode, an organic light emitting layer, or a cathode on a glass substrate by sputtering, vapor deposition, printing, etc., and therefore does not emit light when a foreign substance that obstructs the thin film exists on the glass substrate surface. Problems arise. The cause of contamination of such a glass plate has been difficult to identify, but one of the causes is a solid foreign matter contained in the interleaf for glass plate, and in particular, the present inventor that the solid foreign matter is an aluminum-based inorganic substance. It became clear by the verification.
本発明者らは、ガラス板用合紙に含まれるアルミニウム系無機固形物の含有量を一定以下にするために鋭意検討の結果、ガラス板用合紙の熱水抽出ｐＨを一定範囲に設計することで上記課題を解決できることを見出し、本発明を完成した。 As a result of intensive studies to make the content of aluminum-based inorganic solids contained in the glass sheet slip sheet constant or less, the present inventors design the hot water extraction pH of the glass sheet slip sheet within a certain range. As a result, the inventors have found that the above problems can be solved, and have completed the present invention.
すなわち、本発明は、セルロース繊維を原料とするガラス板用合紙であって、
前記ガラス板用合紙のＪＩＳ Ｐ−８１３３に準拠して測定した熱水抽出ｐＨが３．５〜６．０であるガラス板用合紙に関する。
That is, the present invention is a glass sheet interleaf made of cellulose fiber as a raw material,
The hot water extraction pH measured according to JIS P-8133 of the said glass plate interleaving paper is related with the glass plate interleaving paper which is 3.5-6.0.
本発明のガラス板用合紙は、前記ｐＨが３．５〜５．５であることが好ましい。 The pH of the interleaving paper for glass plate of the present invention is preferably 3.5 to 5.5.
前記ガラス板用合紙は、更に、硫酸アルミニウムを原料とすることが好ましい。 The glass sheet interleaving paper is preferably made of aluminum sulfate as a raw material.
前記硫酸アルミニウムの量がセルロース繊維の乾燥１００重量（質量）部に対して０．５〜３．５重量部であることが好ましい。 The amount of the aluminum sulfate is preferably 0.5 to 3.5 parts by weight with respect to 100 parts by weight (mass) of dried cellulose fibers.
前記ガラス板用合紙は、固体のアルミニウム系無機物質を含まないことが好ましい。 It is preferable that the glass sheet interleaf does not contain a solid aluminum-based inorganic substance.
前記アルミニウム系無機物質が水酸化アルミニウム、酸化アルミニウム及びケイ酸アルミニウムからなる群から選択される１種以上のアルミニウム系化合物を含むことが好ましい。 It is preferable that the aluminum-based inorganic substance includes one or more aluminum-based compounds selected from the group consisting of aluminum hydroxide, aluminum oxide, and aluminum silicate.
前記ガラス板用合紙は、単層であることが好ましい。 The glass sheet slip sheet is preferably a single layer.
前記ガラス板がディスプレイ用であることが好ましい。 It is preferable that the glass plate is for display.
前記ディスプレイがＴＦＴ液晶ディスプレイ又は有機ＥＬディスプレイであることが好ましい。 The display is preferably a TFT liquid crystal display or an organic EL display.
前記ガラス板表面にカラーフィルターが形成されることが好ましい。 A color filter is preferably formed on the surface of the glass plate.
本発明は前記ガラス板用合紙と前記ガラス板との積層物にも関する。 The present invention also relates to a laminate of the glass sheet interleaf and the glass sheet.
本発明は、セルロース繊維及び少なくとも硫酸アルミニウムを水に分散及び溶解して水性分散液を得る分散工程、
前記水性分散液を濾過及び／又は脱水して湿紙を得る抄紙工程、
前記湿紙を乾燥する乾燥工程
を含むガラス板用合紙の製造方法であって、
前記分散工程において水に溶解される硫酸アルミニウムの量をセルロース繊維の乾燥１００重量（質量）部に対して１．０〜３．５重量部とする、ガラス板用合紙の製造方法にも関する。
The present invention is a dispersion step of dispersing and dissolving cellulose fibers and at least aluminum sulfate in water to obtain an aqueous dispersion,
A papermaking step of obtaining a wet paper by filtering and / or dehydrating the aqueous dispersion;
A method for producing a glass sheet interleaving paper comprising a drying step of drying the wet paper,
The present invention also relates to a method for producing a slip sheet for glass plate, wherein the amount of aluminum sulfate dissolved in water in the dispersion step is 1.0 to 3.5 parts by weight with respect to 100 parts by weight (mass) of dry cellulose fibers. .
前記水性分散液のｐＨを３．５〜５．８とすることが好ましい。 It is preferable to adjust the pH of the aqueous dispersion to 3.5 to 5.8.
前記ガラス板用合紙のＪＩＳ Ｐ−８１３３に準拠して測定した熱水抽出ｐＨが３．５〜６．０であることが好ましい。 It is preferable that the hot water extraction pH measured according to JIS P-8133 of the glass sheet interleaf is 3.5 to 6.0.
本発明のガラス板用合紙はガラス板用合紙中の固形異物、特にアルミニウム系無機物を低減することができる。したがって、前記固形物によるガラス板表面の微細な損傷を低減又は防止することができる、また、ガラス板表面への固形物の転写を低減乃至回避できるので、ＴＦＴ液晶ディスプレイ等の製造工程においてカラーフィルター等の回路断線を防止することが可能となる。 The interleaving paper for glass plate of the present invention can reduce solid foreign matters in the interleaving paper for glass plate, especially aluminum-based inorganic substances. Therefore, it is possible to reduce or prevent the fine damage on the glass plate surface due to the solid matter, and to reduce or avoid the transfer of the solid matter to the glass plate surface. It is possible to prevent circuit disconnection such as.
本発明のガラス板用合紙は、セルロース繊維を原料とするガラス板用合紙であって、該合紙のＪＩＳ Ｐ−８１３３に準拠して測定した熱水抽出ｐＨが３．５〜６．０である。この範囲に設計されたガラス板用合紙からは、アルミニウム系無機物が著しく減少する一方で、熱水抽出ｐＨが６．０を超えるとアルミニウム系無機物が増加し、その結果、パネル形成時の問題を引き起こすことが今回明らかとなった。これは、アルミニウムが水溶液のｐＨによってその安定状態が変わることが影響していると推測される。アルミニウムは酸性領域ではＡｌ３＋で存在するが、中性領域では水酸化アルミニウムとなって固形物として析出しやすい。この点を考慮して鋭意検討した結果、ガラス板用合紙の熱水抽出ｐＨを上記の範囲に設計することで本発明のガラス板用合紙中のアルミニウム系無機固形物の存在を抑制することができる。なお、熱水抽出ｐＨが３．５を下回るガラス板用合紙を設計した場合、抄紙条件が極端な酸性領域となるので合紙の地合が悪くなる等の問題が生じる。 The interleaving paper for glass plate of the present invention is an interleaving paper for glass plate using cellulose fiber as a raw material, and the hot water extraction pH of the interleaving paper measured according to JIS P-8133 is 3.5 to 6. 0. From the slip sheet for glass plate designed in this range, while the aluminum-based inorganic matter is remarkably reduced, the aluminum-based inorganic matter increases when the hot water extraction pH exceeds 6.0, resulting in a problem in forming the panel. It became clear this time to cause. This is presumed to be due to the fact that the stable state of aluminum changes depending on the pH of the aqueous solution. Aluminum exists as Al 3+ in the acidic region, but tends to precipitate as a solid in the neutral region as aluminum hydroxide. As a result of diligent examination in consideration of this point, the presence of aluminum-based inorganic solids in the glass sheet slip sheet of the present invention is suppressed by designing the hot water extraction pH of the glass sheet slip sheet within the above range. be able to. In addition, when the glass sheet interleaf for which the hot water extraction pH is less than 3.5 is designed, the papermaking conditions are in an extremely acidic region, which causes problems such as poor formation of the interleaf.
ガラス板用合紙の熱水抽出ｐＨを３．５〜６．０とする手法に特に制限はなく、各種の酸性物質又はアルカリ性物質を使用することができる、例えば、ガラス板用合紙の製造工程における抄紙時において汎用される硫酸アルミニウムの内添量を調整するとよい。特に、通常の抄紙環境下であって他の酸性物質やアルカリ性物質を添加しない場合、硫酸アルミニウムをセルロース繊維の乾燥１００重量部に対して０．５〜３．５重量部程度添加するとよい。もちろん、硫酸アルミニウムの配合量は、硫酸アルミニウムの配合前の白水のｐＨの程度によって適宜調整すればよい。硫酸アルミニウムの量は、乾燥した状態のセルロース繊維の１００重量部に対して０．６〜３．５重量部が好ましく、０．７〜３．４重量部がより好ましく、０．８〜３．２重量部が更により好ましく、０．９〜３．１重量部が更により好ましく、１．０〜２．９重量部が特に好ましい。硫酸アルミニウム配合後の白水のｐＨは３．５〜６．２が好ましく、３．５〜６．０がより好ましく、３．７〜５．８が更により好ましく、４．０〜５．６が特に好ましい。 There is no restriction | limiting in particular in the method which makes hot water extraction pH of the glass sheet interleaf paper 3.5-6.0, Various acidic substances or an alkaline substance can be used, for example, manufacture of the interleaf paper for glass sheets It is advisable to adjust the amount of aluminum sulfate that is commonly used during papermaking in the process. In particular, in a normal papermaking environment, when other acidic substances or alkaline substances are not added, it is preferable to add about 0.5 to 3.5 parts by weight of aluminum sulfate with respect to 100 parts by weight of dry cellulose fibers. Of course, the blending amount of aluminum sulfate may be appropriately adjusted according to the pH level of white water before blending aluminum sulfate. The amount of aluminum sulfate is preferably 0.6 to 3.5 parts by weight, more preferably 0.7 to 3.4 parts by weight, and more preferably 0.8 to 3.3 parts by weight based on 100 parts by weight of the dried cellulose fiber. 2 parts by weight is even more preferred, 0.9 to 3.1 parts by weight is even more preferred, and 1.0 to 2.9 parts by weight is particularly preferred. The pH of the white water after blending with aluminum sulfate is preferably 3.5 to 6.2, more preferably 3.5 to 6.0, still more preferably 3.7 to 5.8, and more preferably 4.0 to 5.6. Particularly preferred.
上記範囲の熱水抽出ｐＨとなるようにガラス板用合紙を抄紙した場合、白水中のアルミニウムは酸性領域でアルミニウムイオンとして存在するので、析出せず合紙中の固形異物にはなり難い。一方で、白水が中性領域であると水酸化アルミニウムや酸化アルミニウムとなって析出しやすい。そして、この水酸化アルミニウムが析出する過程で水中のケイ酸イオン等の無機イオンと更に融合してより体積の大きなケイ酸アルミニウム等を形成する。これらが合紙中の固形異物の原因となる。したがって、アルミニウム系無機物質としては、水酸化アルミニウム、酸化アルミニウム、ケイ酸アルミニウムが挙げられる。このように、アルミニウムは水中のｐＨによって安定な状態が変わるので、例えば硫酸アルミニウムを添加することでアルミニウム自体の量は増すが、合紙中の固形異物であるアルミニウム系無機物はむしろ減少する。 When a paper sheet for glass plate is made so as to have a hot water extraction pH in the above range, aluminum in white water is present as aluminum ions in the acidic region, and thus does not precipitate and hardly forms a solid foreign matter in the paper. On the other hand, when white water is in a neutral region, it tends to precipitate as aluminum hydroxide or aluminum oxide. In the process of precipitation of aluminum hydroxide, it further fuses with inorganic ions such as silicate ions in water to form aluminum silicate having a larger volume. These cause solid foreign matters in the slip sheet. Therefore, examples of the aluminum-based inorganic substance include aluminum hydroxide, aluminum oxide, and aluminum silicate. Thus, since the stable state of aluminum changes depending on the pH in water, for example, by adding aluminum sulfate, the amount of aluminum itself increases, but the aluminum-based inorganic substance that is a solid foreign matter in the interleaf is rather reduced.
以上の理由により、本発明のガラス板用合紙は、固体のアルミニウム系無機物を含まないことが好ましい。ここで「固体」とは常圧（１気圧）下、且つ、常温（２５℃）の状態で固体の状態にあることを意味している。したがって、前記アルミニウム系無機物の融点は２５℃を超えており、５０℃以上が好ましく、８０℃以上がより好ましく、１００℃以上が更により好ましい。特に、２５℃の条件下で固体のアルミニウム系無機物の含量がセルロース繊維の乾燥重量に対して１００ｐｐｍ以下であることが好ましく、さらに好ましくは８０ｐｐｍ以下であり、さらにより好ましくは６０ｐｐｍである。 For the above reasons, it is preferable that the interleaving paper for glass plate of the present invention does not contain a solid aluminum-based inorganic material. Here, “solid” means a solid state under normal pressure (1 atm) and at a normal temperature (25 ° C.). Therefore, the melting point of the aluminum-based inorganic material exceeds 25 ° C, preferably 50 ° C or higher, more preferably 80 ° C or higher, and even more preferably 100 ° C or higher. In particular, the content of the solid aluminum-based inorganic substance at 25 ° C. is preferably 100 ppm or less, more preferably 80 ppm or less, still more preferably 60 ppm, based on the dry weight of the cellulose fiber.
なお、本発明において使用可能なセルロース繊維は、針葉樹晒クラフトパルプ（ＮＢＫＰ）、広葉樹晒クラフトパルプ（ＬＢＫＰ）、針葉樹晒サルファイトパルプ（ＮＢＳＰ）、広葉樹晒サルファイトパルプ（ＬＢＳＰ）、サーモメカニカルパルプ（ＴＭＰ）等の木材パルプを単独あるいは混合したものを用いる。このセルロース繊維を主体とし、必要に応じてこれに麻、竹、藁、ケナフ、楮、三椏や木綿等の非木材パルプ、カチオン化パルプ、マーセル化パルプ等の変性パルプ、レーヨン、ビニロン、ナイロン、アクリル、ポリエステル等の合成繊維や化学繊維、またはミクロフィブリル化パルプを単独で、あるいは混合して併用することができる。ただし、パルプ中に樹脂分が多く含まれると、当該樹脂分がガラス板表面を汚す等の悪影響を及ぼす可能性があるので、できるだけ樹脂分の少ない化学パルプ、例えば針葉樹晒クラフトパルプを単独で使用することが好ましい。また、砕木パルプのような高収率パルプは、樹脂分が多く含まれるので好ましくない。なお、合成繊維や化学繊維を混合させると削刀性が向上し、合紙を平版にする際の作業性が向上するが、廃棄物処理の面においてリサイクル性が悪くなるので注意が必要である。 The cellulose fibers usable in the present invention include softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), hardwood bleached sulfite pulp (LBSP), thermomechanical pulp ( A wood pulp such as TMP) or a mixture thereof is used. Mainly composed of this cellulose fiber, and if necessary, non-wood pulp such as hemp, bamboo, cocoon, kenaf, cocoon, cocoon and cotton, modified pulp such as cationized pulp, mercerized pulp, rayon, vinylon, nylon, Synthetic fibers such as acrylic and polyester, chemical fibers, or microfibrillated pulp can be used alone or in combination. However, if the pulp contains a large amount of resin, the resin may contaminate the glass plate surface. Therefore, chemical pulp with as little resin as possible, for example, softwood bleached kraft pulp, is used alone. It is preferable to do. Also, high yield pulp such as groundwood pulp is not preferred because it contains a large amount of resin. In addition, mixing synthetic fibers and chemical fibers improves cutting performance and improves workability when making interleaving paper into a lithographic plate. However, care must be taken because recyclability deteriorates in terms of waste disposal. .
また、本発明の性能を損なわない範囲で、上記した木材パルプを主体とした製紙用繊維に対して、必要に応じて接着剤、防黴剤、各種の製紙用填料、湿潤紙力増強剤、乾燥紙力増強剤、サイズ剤、着色剤、定着剤、歩留まり向上剤、スライムコントロール剤等を添加し、次いで公知・既存の長網抄紙機、円網抄紙機、短網抄紙機、長網と円網のコンビネーション抄紙機等で抄造して得ることができる。また、これら薬品添加の際には虫やごみ等が混入しないように細心の注意を要する。 In addition, in the range not impairing the performance of the present invention, for the papermaking fiber mainly composed of the above-described wood pulp, if necessary, an adhesive, an antifungal agent, various papermaking fillers, a wet paper strength enhancer, Add dry paper strength enhancer, sizing agent, colorant, fixing agent, yield improver, slime control agent, etc., then known and existing long net paper machine, circular net paper machine, short net paper machine, long net It can be obtained by paper making with a circular net combination paper machine. In addition, when adding these chemicals, extreme caution is required so that insects and dust do not enter.
本発明のガラス板用合紙を製造する際に、セルロース繊維の叩解を進めると紙層間強度が増す効果が期待できる。しかしながら、叩解を進めることによってセルロース繊維中の微細繊維が増加すると、合紙として使用中に紙粉が発生する恐れがあるので、必要以上に叩解度を進めることは好ましくない。よって本発明において好ましい叩解度は３００〜６５０ｍｌｃ．ｓ．ｆ．である。 When the interleaving paper for a glass plate of the present invention is produced, the effect of increasing the strength between the paper layers can be expected by beating the cellulose fibers. However, if the fine fibers in the cellulose fiber increase as the beating progresses, paper dust may be generated during use as a slip sheet, and it is not preferable to advance the beating degree more than necessary. Therefore, a preferable beating degree in the present invention is 300 to 650 mlc. s. f. It is.
本発明においては、ガラス板用合紙の熱水抽出ｐＨを３．５〜６．０の範囲内で適宜調節可能であり、例えば、４．０以上、４．５以上、５．０以上又は５．５以上、且つ、６．０以下、並びに、３．５以上、且つ、５．９以下、５．８以下、５．７以下又は５．６以下とすることができる。ガラス板用合紙の熱水抽出ｐＨを３．５〜５．５の範囲とすることがアルミニウム系無機物の低減の観点では好ましいが、ガラス板用合紙の熱水抽出ｐＨを３．６〜５．９の範囲にすることが好ましく、３．８〜５．７の範囲がより好ましく、４．０〜５．５の範囲が更により好ましい。上記のとおり酸性が強いと合紙の地合等が悪化するおそれが高まり、また、熱水抽出ｐＨが５．７を超える場合（特に熱水抽出ｐＨが５．９を超える場合）、携帯端末等に使用される非常に高精細なディスプレイを必要とする場面において、ガラスに転移した微量のアルミニウム系無機物が要因で発生するカラーフィルムの断線箇所が、高精彩であるが故に目立ち、品質不良と判断されてしまうおそれが高まるからである。 In the present invention, the hot water extraction pH of the glass sheet interleaving paper can be appropriately adjusted within the range of 3.5 to 6.0, for example, 4.0 or more, 4.5 or more, 5.0 or more, or 5.5 or more and 6.0 or less, and 3.5 or more and 5.9 or less, 5.8 or less, 5.7 or less, or 5.6 or less. Although it is preferable from the viewpoint of reduction of the aluminum-based inorganic material that the hot water extraction pH of the glass sheet interleaving paper is in the range of 3.5 to 5.5, the hot water extraction pH of the glass sheet interleaving paper is 3.6 to The range is preferably 5.9, more preferably 3.8 to 5.7, and even more preferably 4.0 to 5.5. If the acidity is strong as described above, the formation of the slip sheet is likely to deteriorate, and if the hot water extraction pH exceeds 5.7 (especially when the hot water extraction pH exceeds 5.9), In a scene that requires a very high-definition display that is used in, etc., the disconnection part of the color film that is caused by a small amount of aluminum-based inorganic material transferred to glass is conspicuous because it is high-definition, This is because the risk of being judged increases.
本発明のガラス板用合紙は、抄造の途中および／または製造後でカレンダー処理、スーパーカレンダー処理、ソフトニップカレンダー処理、エンボス等の加工を行っても構わない。加工処理により、表面性や厚さを調整することができる。 The interleaving paper for glass plate of the present invention may be subjected to processing such as calendering, super calendering, soft nip calendering, embossing and the like during papermaking and / or after production. Surface properties and thickness can be adjusted by processing.
本発明のガラス板用合紙は、好ましくは単層であり、ガラス板の間に挿入されて使用される。例えば、本発明のガラス板合紙は複数のガラス板の間に、典型的には、１枚ずつ挿入され、全体として、積層体とされ、当該積層体が保管、運搬の対象となる。 The interleaving paper for glass plate of the present invention is preferably a single layer and is used by being inserted between glass plates. For example, the glass plate interleaving paper of the present invention is typically inserted one by one between a plurality of glass plates to form a laminate as a whole, and the laminate is an object of storage and transportation.
ガラス板としては特に限定されるものではないが、プラズマディスプレイパネル、液晶ディスプレイパネル（特にＴＦＴ液晶ディスプレイパネル）、有機ＥＬディスプレイパネル等のフラットパネル・ディスプレイ用のガラス板であることが好ましい。フラットパネル・ディスプレイ用のガラス板の表面には微細な電極、隔壁等が形成されるが、本発明のガラス板用合紙を使用することにより、ガラス板へのアルミニウム系無機物の転写が抑制乃至回避されるので、ガラス板の表面に微細な電極、隔壁等が形成されても、アルミニウム系無機物による不都合を抑制乃至回避することができ、結果的に、ディスプレイの欠陥を抑制乃至回避することができる。したがって、本発明のガラス板用合紙は表面にカラーフィルターが形成されるガラス板用の合紙として特に有用である。 Although it does not specifically limit as a glass plate, It is preferable that it is a glass plate for flat panel displays, such as a plasma display panel, a liquid crystal display panel (especially TFT liquid crystal display panel), and an organic electroluminescent display panel. Fine electrodes, partition walls, etc. are formed on the surface of the glass plate for flat panel displays. By using the glass plate interleaving paper of the present invention, the transfer of the aluminum-based inorganic material to the glass plate is suppressed or suppressed. Therefore, even if fine electrodes, partition walls, etc. are formed on the surface of the glass plate, it is possible to suppress or avoid inconveniences caused by aluminum-based inorganic substances, and consequently suppress or avoid display defects. it can. Therefore, the slip sheet for glass plate of the present invention is particularly useful as a slip sheet for glass plate on which a color filter is formed.
特に、ディスプレイの大型化に伴い、フラットパネル・ディスプレイ用のガラス板のサイズ及び重量は増大しているが、本発明のガラス板用合紙はそのような大型乃至大重量のガラス板の表面を良好に保護することができる。特に、本発明のガラス板用合紙はアルミニウム系無機固形物の含有量が極めて少ないので、大重量のガラス板によって押圧されてもアルミニウム系無機物がガラス板に転写することが抑制乃至回避される。したがって、本発明のガラス板用合紙は、表面の清浄性が特に求められるフラットパネル・ディスプレイ用のガラス板に好適に使用することができる。 In particular, the size and weight of a glass plate for a flat panel display have increased with the increase in the size of the display. However, the slip sheet for a glass plate of the present invention has the surface of such a large or heavy glass plate. It can be well protected. In particular, since the slip sheet for glass plate of the present invention has a very small content of aluminum-based inorganic solids, the aluminum-based inorganic material is suppressed or avoided from being transferred to the glass plate even when pressed by a heavy glass plate. . Therefore, the interleaving paper for a glass plate of the present invention can be suitably used for a glass plate for a flat panel display in which surface cleanliness is particularly required.
本発明は、ガラス板用合紙の製造方法にも関する。本発明のガラス板用合紙の製造方法は、セルロース繊維及び少なくとも硫酸アルミニウムを水に分散及び溶解して水性分散液を得る分散工程、前記水性分散液を濾過及び／又は脱水して湿紙を得る抄紙工程、前記湿紙を乾燥する乾燥工程を少なくとも含み、前記分散工程において水に溶解される硫酸アルミニウムの量をセルロース繊維の乾燥１００重量部に対して０．５〜３．５重量部、好ましくは０．６〜３．４重量部、より好ましくは０．７〜３．２重量部、更により好ましくは０．８〜３．１重量部、更により好ましくは０．９〜２．９重量部、特に好ましくは１．０〜２．９重量部とすることを特徴とする。 The present invention also relates to a method for producing a glass sheet slip sheet. The method for producing the interleaf paper for glass plate according to the present invention comprises a dispersion step of dispersing and dissolving cellulose fibers and at least aluminum sulfate in water to obtain an aqueous dispersion, and filtering and / or dehydrating the aqueous dispersion to obtain a wet paper Including a paper making process, a drying process for drying the wet paper, and an amount of aluminum sulfate dissolved in water in the dispersing process is 0.5 to 3.5 parts by weight with respect to 100 parts by weight of the dried cellulose fibers; Preferably 0.6 to 3.4 parts by weight, more preferably 0.7 to 3.2 parts by weight, even more preferably 0.8 to 3.1 parts by weight, even more preferably 0.9 to 2.9 parts by weight. Part by weight, particularly preferably 1.0 to 2.9 parts by weight.
本発明のガラス板用合紙の製造方法においては、前記水性分散液のｐＨを３．５〜５．８とすることが好ましく、３．５〜５．３がより好ましく、３．５〜４．８が更により好ましく、３．５〜４．６が特に好ましい。 In the method for producing a glass sheet slip sheet according to the present invention, the aqueous dispersion preferably has a pH of 3.5 to 5.8, more preferably 3.5 to 5.3, and more preferably 3.5 to 4. .8 is even more preferable, and 3.5 to 4.6 is particularly preferable.
前記ガラス板用合紙のＪＩＳ Ｐ−８１３３に準拠して測定した熱水抽出ｐＨは３．５〜６．０であることが好ましく、３．６〜５．９がより好ましく、３．８〜５．７が更により好ましく、４．０〜５．５が特に好ましい。 The hot water extraction pH measured in accordance with JIS P-8133 of the interleaf paper for glass plate is preferably 3.5 to 6.0, more preferably 3.6 to 5.9, and more preferably 3.8 to 5.7 is even more preferable, and 4.0 to 5.5 is particularly preferable.
以下、本発明を実施例及び比較例を用いてより具体的に説明するが、本発明の範囲は実施例に限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated more concretely using an Example and a comparative example, the scope of the present invention is not limited to an Example.
（１）熱水抽出ｐＨの測定
ＪＩＳ Ｐ−８１３３（１９９８年）に準拠して測定した。
(1) Measurement of hot water extraction pH It was measured according to JIS P-8133 (1998).
（２）ガラスへの転写試験（輸送テスト）
アルミ製で７５度の角度がつけられたＬ 字架台上のガラス載置面に発泡ウレタンを敷き、ガラス板を垂直方向に載置するための載置面と、載置面の後端部から垂直方向に延びる背もたれ面に向けて、サイズ６８０ｍｍ×８８０ｍｍ×０．７ｍｍのガラス板１２０枚と各ガラス板の間にガラス板用合紙を挿入して、背もたれ面に平行となるように立てかけ、架台に固定された帯状のベルトを後端部から背もたれ面へ全周にわたり掛け渡してガラス板を固定した。上記のようにセットされた架台は、外部からの埃や塵等の混入を防ぐため包装資材で全面を被覆した。その後、トラックでの輸送テストを実施した。輸送テスト条件は、輸送距離１０００ｋｍ（輸送途中に４０℃×９５％ＲＨの環境下に５日間保管）でテストを実施した。
(2) Transfer test to glass (transport test)
Aluminum foam is placed on the glass mounting surface on the L-shaped gantry at an angle of 75 degrees, and the mounting surface for mounting the glass plate vertically, and the rear end of the mounting surface Insert a sheet of glass plate between 120 glass plates of size 680 mm x 880 mm x 0.7 mm and each glass plate toward the backrest surface extending in the vertical direction, and lean against the backrest surface so that it is parallel to the backrest surface. A fixed belt-like belt was stretched over the entire circumference from the rear end portion to the backrest surface to fix the glass plate. The gantry set as described above was entirely covered with a packaging material in order to prevent dust and dirt from entering from the outside. After that, a truck transportation test was conducted. The transportation test was conducted at a transportation distance of 1000 km (stored for 5 days in an environment of 40 ° C. × 95% RH during transportation).
［実施例１］
乾燥木材パルプとして針葉樹晒クラフトパルプＡを１００質量部用意し、これを離解して叩解度を５４０ｍｌｃ．ｓ．ｆ．に調製したスラリーに紙力増強剤としてポリアクリルアミド（商品名：ポリストロン１２５０、荒川化学工業社製）を全パルプ質量に対して０．２質量部添加し、さらに硫酸アルミニウムを全パルプ質量（１００質量部）に対して０．７重量部添加して、０．３質量％濃度のパルプスラリーを調成した。このとき、パルプスラリーのｐＨは５．８であった。これを、長網抄紙機を使用して、坪量５０ｇ／ｍ２のガラス板用合紙を得た。このガラス板用合紙の熱水抽出ｐＨは５．９であった。
[Example 1]
100 parts by weight of softwood bleached kraft pulp A was prepared as dry wood pulp, and this was disaggregated to give a beating degree of 540 mlc. s. f. In addition, 0.2 parts by mass of polyacrylamide (trade name: Polystron 1250, manufactured by Arakawa Chemical Industries, Ltd.) as a paper strength enhancer is added to the prepared slurry, and aluminum sulfate is added to the total pulp mass (100 0.7 parts by weight was added to (parts by weight) to prepare a pulp slurry having a concentration of 0.3% by weight. At this time, the pH of the pulp slurry was 5.8. Using this, a paper web for glass plate having a basis weight of 50 g / m 2 was obtained using a long paper machine. The hot water extraction pH of this glass sheet slip sheet was 5.9.
［実施例２］
硫酸アルミニウムを全パルプ質量に対して２．１重量部添加した以外は実施例１と同様の手法で、坪量５０ｇ／ｍ２のガラス板用合紙を得た。途中で製造されたパルプスラリーのｐＨは４．７であった。このガラス板用合紙の熱水抽出ｐＨは４．９であった。
[Example 2]
A glass sheet slip with a basis weight of 50 g / m 2 was obtained in the same manner as in Example 1 except that 2.1 parts by weight of aluminum sulfate was added to the total pulp mass. The pH of the pulp slurry produced on the way was 4.7. The hot water extraction pH of this glass sheet slip sheet was 4.9.
［実施例３］
硫酸アルミニウムを全パルプ質量に対して３．５重量部添加した以外は実施例１と同様の手法で、坪量５０ｇ／ｍ２のガラス板用合紙を得た。途中で製造されたパルプスラリーのｐＨは３．５であった。このガラス板用合紙の熱水抽出ｐＨは３．５であった。
[Example 3]
A glass sheet slip with a basis weight of 50 g / m 2 was obtained in the same manner as in Example 1 except that 3.5 parts by weight of aluminum sulfate was added to the total pulp mass. The pH of the pulp slurry produced on the way was 3.5. The hot water extraction pH of this glass sheet slip sheet was 3.5.
［実施例４］
硫酸アルミニウムを全パルプ質量に対して１．０重量部添加した以外は実施例１と同様の手法で、坪量５０ｇ／ｍ２のガラス板用合紙を得た。途中で製造されたパルプスラリーのｐＨは５．７であった。このガラス板用合紙の熱水抽出ｐＨは５．５であった。
[Example 4]
A glass sheet slip with a basis weight of 50 g / m 2 was obtained in the same manner as in Example 1 except that 1.0 part by weight of aluminum sulfate was added to the total pulp mass. The pH of the pulp slurry produced on the way was 5.7. The hot water extraction pH of this glass sheet slip sheet was 5.5.
［比較例１］
硫酸アルミニウムを全パルプ質量に対して０．１重量部添加した以外は実施例１と同様の手法で、坪量５０ｇ／ｍ２のガラス板用合紙を得た。途中で製造されたパルプスラリーのｐＨは６．３であった。このガラス板用合紙の熱水抽出ｐＨは６．４であった。
[Comparative Example 1]
A glass sheet slip with a basis weight of 50 g / m 2 was obtained in the same manner as in Example 1 except that 0.1 part by weight of aluminum sulfate was added to the total pulp mass. The pH of the pulp slurry produced on the way was 6.3. The hot water extraction pH of this glass sheet slip sheet was 6.4.
［比較例２］
硫酸アルミニウムを全パルプ質量に対して４．０重量部添加した以外は実施例１と同様の手法で、坪量５０ｇ／ｍ２のガラス板用合紙を得た。途中で製造されたパルプスラリーのｐＨは３．０であった。このガラス板用合紙の熱水抽出ｐＨは３．０であった。
[Comparative Example 2]
A glass sheet slip with a basis weight of 50 g / m 2 was obtained in the same manner as in Example 1 except that 4.0 parts by weight of aluminum sulfate was added to the total pulp mass. The pH of the pulp slurry produced on the way was 3.0. The hot water extraction pH of this glass sheet slip sheet was 3.0.
実施例および比較例で得られたガラス板用合紙の転写試験を行った。実施例１のガラス板用合紙を用いたガラス板の表面にはアルミニウム系無機物がほとんど検出されなかった。実施例２〜実施例４のガラス板用合紙を用いたガラス板の表面にはアルミニウム系無機物が全く検出されなかった。特に、実施例４のガラス板用合紙では、ガラス板の表面だけでなくガラス板用合紙の表面からもアルミニウム系無機物はほとんど検出されなかった。そして、実施例２〜４の合紙を用いたガラス板は、液晶パネルのアレイ形成の際に、カラーフィルムの断線は認められなかった。一方で、比較例１および比較例２のガラス板用合紙を用いたガラス板は、液晶パネルのアレイ形成の際に、カラーフィルムの断線が確認された。 The transfer test of the interleaf paper for glass plates obtained in Examples and Comparative Examples was performed. Almost no aluminum-based inorganic substance was detected on the surface of the glass plate using the interleaf for glass plate of Example 1. No aluminum-based inorganic substance was detected on the surface of the glass plate using the glass sheet interleaving paper of Examples 2 to 4. In particular, in the interleaving paper for glass plate of Example 4, almost no aluminum-based inorganic material was detected not only from the surface of the glass plate but also from the surface of the interleaving paper for glass plate. And the glass plate using the interleaving paper of Examples 2-4 did not recognize the disconnection of a color film in the case of liquid crystal panel array formation. On the other hand, disconnection of the color film was confirmed in the glass plate using the interleaving paper for the glass plate of Comparative Example 1 and Comparative Example 2 when forming the array of the liquid crystal panel.
以上の結果より、本発明のガラス板用合紙を用いることで、合紙からガラス板へのアルミニウム系無機物の転移を防ぐことができ、その結果、液晶パネルのアレイ形成を好適に行うガラス板を製造することが可能となることが分かる。 From the above results, by using the interleaving paper for glass plate of the present invention, it is possible to prevent the transfer of the aluminum-based inorganic material from the interleaving paper to the glass plate, and as a result, a glass plate that favorably forms an array of liquid crystal panels. It can be seen that it is possible to manufacture.
Claims (14)
前記ガラス板用合紙のＪＩＳ Ｐ−８１３３に準拠して測定した熱水抽出ｐＨが３．５〜６．０であるガラス板用合紙。 It is a slip sheet for glass plate made from cellulose fiber,
The glass sheet interleaf sheet having a hot water extraction pH of 3.5 to 6.0 measured according to JIS P-8133 of the glass sheet interleaf sheet.
前記水性分散液を濾過及び／又は脱水して湿紙を得る抄紙工程、
前記湿紙を乾燥する乾燥工程
を含むガラス板用合紙の製造方法であって、
前記分散工程において水に溶解される硫酸アルミニウムの量をセルロース繊維の乾燥１０重量部に対して０．５〜３．５重量部とする、ガラス板用合紙の製造方法。 A dispersion step of dispersing and dissolving cellulose fiber and at least aluminum sulfate in water to obtain an aqueous dispersion;
A papermaking step of obtaining a wet paper by filtering and / or dehydrating the aqueous dispersion;
A method for producing a glass sheet interleaving paper comprising a drying step of drying the wet paper,
The manufacturing method of the interleaf for glass plates which makes the quantity of the aluminum sulfate melt | dissolved in water in the said dispersion | distribution process 0.5-3.5 weight part with respect to 10 weight part of dryness of a cellulose fiber.
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| CN109183515A (en) * | 2018-10-15 | 2019-01-11 | 马鞍山市雷立科技有限公司 | Electronic glass flexible spacer paper and production process thereof |
| WO2019188927A1 (en) * | 2018-03-29 | 2019-10-03 | 特種東海製紙株式会社 | Glass plate interleaving paper and method for manufacturing same |
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| WO2019188927A1 (en) * | 2018-03-29 | 2019-10-03 | 特種東海製紙株式会社 | Glass plate interleaving paper and method for manufacturing same |
| JPWO2019188927A1 (en) * | 2018-03-29 | 2021-02-12 | 特種東海製紙株式会社 | Insertion paper for glass plates and its manufacturing method |
| TWI820098B (en) * | 2018-03-29 | 2023-11-01 | 日商特種東海製紙股份有限公司 | Glass plate-interleaving paper and manufacturing method thereof, laminate, and method for protecting glass plate |
| CN109183515A (en) * | 2018-10-15 | 2019-01-11 | 马鞍山市雷立科技有限公司 | Electronic glass flexible spacer paper and production process thereof |
| CN109183515B (en) * | 2018-10-15 | 2021-07-06 | 马鞍山市雷立科技有限公司 | Electronic glass flexible spacer paper and production process thereof |
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