JP4304224B1 - Glass slip paper - Google Patents
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- JP4304224B1 JP4304224B1 JP2008026858A JP2008026858A JP4304224B1 JP 4304224 B1 JP4304224 B1 JP 4304224B1 JP 2008026858 A JP2008026858 A JP 2008026858A JP 2008026858 A JP2008026858 A JP 2008026858A JP 4304224 B1 JP4304224 B1 JP 4304224B1
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- 239000011521 glass Substances 0.000 title claims abstract description 173
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims description 28
- -1 fatty acid esters Chemical class 0.000 claims description 8
- 238000009736 wetting Methods 0.000 claims description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 150000005215 alkyl ethers Chemical class 0.000 claims description 3
- 238000012876 topography Methods 0.000 claims description 2
- 239000000123 paper Substances 0.000 description 97
- 238000012360 testing method Methods 0.000 description 18
- 239000000758 substrate Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 13
- 239000011347 resin Substances 0.000 description 11
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 6
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- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
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- 238000011156 evaluation Methods 0.000 description 4
- 239000002655 kraft paper Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 239000010893 paper waste Substances 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
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- 238000004441 surface measurement Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
【課題】高度な表面性が必要とされるガラスの間に挿入され使用される合紙、特に一方の辺が１，５００ｍｍ以上の大判のガラス用に関して、合紙が挿入された状態での搬送時において、ガラスと合紙との境界に存在する異物等によるガラス表面の傷入りを防止でき、かつ高品質なパルプ原料として多様な用途への再利用ができるガラス用合紙とする。
【解決手段】パルプ原料を主成分とするガラス用合紙であって、坪量が３０〜６０ｇ／ｍ2であり、ＪＩＳＰ８１１８に準拠した、ガラス用合紙の巾方向の紙厚を２ｃｍ間隔で測定した、隣接する測定点の最大紙厚差が８μｍ以下かつ紙厚の最大値と最小値の差が１６μｍ以下である
【選択図】なしThe present invention relates to a slip sheet that is inserted and used between glasses that require a high degree of surface property, particularly for large-sized glass having one side of 1,500 mm or more, and transporting the slip sheet in the inserted state. In some cases, a glass slip sheet that can prevent damage to the glass surface due to foreign matters or the like existing at the boundary between the glass and the slip sheet and can be reused for various purposes as a high-quality pulp raw material is obtained.
A glass interleaving paper mainly composed of a pulp raw material, having a basis weight of 30 to 60 g / m 2 , and a paper thickness in the width direction of the glass interleaving paper in accordance with JISP8118 at intervals of 2 cm. The maximum paper thickness difference between adjacent measurement points measured is 8 μm or less, and the difference between the maximum and minimum paper thickness is 16 μm or less.
Description
本発明は、高い表面性が必要とされるガラス、特に液晶テレビやプラズマテレビなどのフラットパネルディスプレイに用いられるガラス基板の間に挿入され使用される合紙に関する。さらに詳しくは、合紙が挿入された状態での搬送時において、ガラス基板と合紙が不均一に接触することによるガラス表面の傷入りが防止できるガラス用合紙に関するものであり、特に一方の辺が、１，５００ｍｍを超える、大判のガラス基板に好適に用いられるガラス用合紙に関するものである。 The present invention relates to a slip sheet that is inserted between a glass substrate used for a flat panel display such as a liquid crystal television or a plasma television, in particular, which requires a high surface property. More specifically, the present invention relates to a glass slip sheet that can prevent damage to the glass surface due to non-uniform contact between the glass substrate and the slip sheet during conveyance with the slip sheet inserted. The present invention relates to a slip sheet for glass suitably used for a large glass substrate having a side exceeding 1,500 mm.
この種のガラス用合紙は、ガラスどうしの擦れによる傷入り防止を主な目的として、長網抄紙機で抄造したクラフト紙や更紙等がガラス間に挿入され使用されていた。 This type of slip paper for glass has been used with kraft paper or renewal paper made by a long net paper machine inserted between the glasses mainly for the purpose of preventing scratches caused by rubbing between the glasses.
近年、ガラスの多様化により、ガラス用合紙に対する品質要求がきびしくなっている。たとえば、液晶ディスプレイやプラズマディスプレイ等のフラットパネルディスプレイに用いられるガラス基板では、ガラス表面に電子部材等が皮膜処理されるため、ガラス表面に要求される清浄度や表面平坦性が高く、そのためガラス用合紙に対する品質要求も厳しくなってきている。さらに、ガラス基板の大型化・量産化に伴い、搬送効率を高めるため、ガラス基板を極力重ねて搬送するようになり、ガラス合紙との接触面積が飛躍的に拡大する結果から、ガラス基板が横ズレした際の、ガラス基板と合紙との境界に存在するガラス粉等異物による傷入りの発生がさらに大きな問題となっている。 In recent years, with the diversification of glass, quality requirements for glass slip sheets have become severe. For example, glass substrates used in flat panel displays such as liquid crystal displays and plasma displays have high cleanliness and surface flatness required for the glass surface because electronic components are coated on the glass surface. Quality requirements for slip sheets are becoming stricter. Furthermore, with the increase in size and mass production of glass substrates, in order to increase the transport efficiency, the glass substrates are transported in layers as much as possible, and the contact area with the glass interleaving paper is greatly expanded. The occurrence of scratches due to foreign matters such as glass powder existing at the boundary between the glass substrate and the slip sheet when laterally shifted is a further serious problem.
フラットパネルディスプレイに用いられるガラス基板に対しては、これまでガラス表面への汚染と傷入りの防止を目的として、内添薬品とパルプ原料をコントロールし、紙中の樹脂分を極力低減するとともに密度を下げる提案が開示されている（特許文献１：特開平１８−０４４６７４）。しかしながら、ガラス基板の搬送時に起きる横ズレ、特に大判のガラス搬送に対しては、表面平坦性の低い従来のクラフト紙や更紙では上述の課題を十分に達成することが難しく、ガラス基板との密着性がよく、かつクッション性のあるガラス用合紙が望まれていた。また、ガラス基板の量産化、大型化によりガラス用合紙の使用量が増大しているため、使用済みガラス合紙の保管場所や処理方法にも問題が生じている。 For glass substrates used in flat panel displays, the internal chemicals and pulp raw materials have been controlled to reduce the resin content in the paper as much as possible in order to prevent contamination and scratches on the glass surface. The proposal which lowers | hangs is disclosed (patent document 1: Unexamined-Japanese-Patent No. 18-044674). However, it is difficult to achieve the above-mentioned problems sufficiently with conventional kraft paper and renewed paper with low surface flatness for lateral misalignment that occurs during the transportation of the glass substrate, especially for large format glass transportation. Glass interleaving paper having good adhesion and cushioning properties has been desired. In addition, since the amount of use of glass interleaving paper is increasing due to the mass production and enlargement of glass substrates, there are problems in the storage location and processing method of used glass interleaving paper.
ガラス合紙は、比較的樹脂分の低いパルプ原料で構成されており、薬品の添加や樹脂分が浸出し易い叩解処理等の、従来抄紙する際に成されていた前処理が殆ど施されていないため、純度の高いバージンパルプ原料として幅広い用途への再利用が可能である。そこで、リサイクル性に優れている点に着目し、使用済みガラス用合紙が発生したのち、離解してパルプ化する、すなわち減容化し、原料パルプとして用いることで上記問題が解決できるため、使用時の品質要求だけでなく、使用後の離解性にも優れたガラス用合紙も要望されている。
本発明が解決しようとする主たる課題は、高い表面性（傷入り、密着性等）が必要とされるガラス、その中でも特に液晶テレビやプラズマテレビなどのフラットパネルディスプレイに用いられるガラス基板の間に挿入され使用される合紙、特に一方の辺が１，５００ｍｍ以上の大判のガラス用にも好適に用いられるガラス合紙を提供することにある。特に、合紙が挿入された状態での搬送時において、ガラス基板と合紙との境界に存在する異物等によるガラス表面の傷入りの防止、ガラスとの密着性に優れ、かつ高品質なパルプ原料として多様な用途への再利用ができるガラス用合紙を提供する。 The main problem to be solved by the present invention is that glass having high surface properties (scratches, adhesion, etc.) is required, especially among glass substrates used in flat panel displays such as liquid crystal televisions and plasma televisions. An object of the present invention is to provide an interleaving paper to be inserted and used, in particular, a glass interleaving paper suitably used for large-sized glass having one side of 1,500 mm or more. In particular, when transporting with the slip sheet inserted, it prevents the glass surface from being scratched by foreign matter or the like present at the boundary between the glass substrate and the slip sheet, has excellent adhesion to the glass, and has high quality. Providing glass slips that can be reused for various purposes as raw materials.
この課題を解決した本発明は、次のとおりである。
〔請求項１記載の発明〕
パルプ原料を主成分とするガラス用合紙であって、坪量が３０〜６０ｇ／ｍ2であり、 ＪＩＳＰ８１１８に準拠した、ガラス用合紙の巾方向の紙厚を２ｃｍ間隔で測定した、隣接する測定点の最大紙厚差が８μｍ以下かつ紙厚の最大値と最小値の差が１６μｍ以下であり、
さらに、ルンケル比が０．８以下、かつ、少なくとも片面のマイクロトポグラフが２３ｋｇｆ／ｃｍ2条件下で６．０μｍ以下であり、かつ少なくとも片方が艶面を有するヤンキー紙であることを特徴とするガラス用合紙。
The present invention that has solved this problem is as follows.
[Invention of Claim 1]
Adjacent paper with a pulp raw material as a main component, having a basis weight of 30 to 60 g / m 2 , and measuring the thickness in the width direction of the glass paper in accordance with JISP8118 at intervals of 2 cm. The maximum paper thickness difference between the measurement points is 8 μm or less, and the difference between the maximum and minimum paper thickness is 16 μm or less,
Furthermore, Runkeru ratio of 0.8 or less, and wherein at least one surface of the micro-topography is Ri der less 6.0μm at 23kgf / cm 2 under the conditions, and at least one is a Yankee paper having a gloss surface Glass paper.
〔請求項２記載の発明〕
ＪＩＳＰ８２２０に準拠して離解したガラス用合紙製品離解パルプの、ＪＩＳＰ８１２１に準拠したカナダ標準ろ水度試験器による濾水度が５００〜６８０ｍｌである請求項１記載のガラス用合紙。
[Invention of Claim 2]
2. The interleaving paper for glass according to claim 1, wherein the glass pulp paper disaggregated according to JISP8220 has a freeness of 500 to 680 ml by a Canadian standard freeness tester conforming to JISP8121.
〔請求項３記載の発明〕
前記パルプ原料として、使用するパルプ原料の平均繊維長が１．０ｍｍ以上１．６ｍｍ未満であり、ＮＢＫＰとＬＢＫＰの配合割合が５０／５０〜１５／８５重量％である請求項１または２記載のガラス用合紙。
[Invention of Claim 3]
The average fiber length of the pulp raw material used as the pulp raw material is 1.0 mm or more and less than 1.6 mm, and the blending ratio of NBKP and LBKP is 50/50 to 15/85% by weight. Glass paper.
〔請求項４記載の発明〕
紙中に、ポリオキシアルキレン脂肪酸エステル、ポリオキシアルキレンアルキルエーテル、ポリオキシエチレンノニルフェニルエーテルから選ばれる濡れ向上剤を０．０１〜０．５０重量％含有する請求項１〜３のいずれか１項に記載のガラス用合紙。
[Invention of Claim 4]
The paper according to any one of claims 1 to 3, wherein the paper contains 0.01 to 0.50 wt% of a wetting improver selected from polyoxyalkylene fatty acid esters, polyoxyalkylene alkyl ethers, and polyoxyethylene nonylphenyl ethers. Glass slip paper as described in 1.
本発明によると、高い表面性が必要とされるガラス、特に液晶テレビやプラズマテレビなどのフラットパネルディスプレイに用いられるガラス基板の間に挿入され使用される合紙、特に一方の辺が１，５００ｍｍ以上の大判のガラス用にも好適に用いられるガラス合紙に関し、合紙が挿入された状態での搬送時において、ガラス基板と合紙との境界存在する異物等によるガラス表面の傷入りが防止でき、かつ高品質なパルプ原料として多様な用途への再利用ができるガラス用合紙を提供することができる。 According to the present invention, a slip sheet that is inserted between a glass substrate that is used for a flat panel display such as a liquid crystal television or a plasma television, in particular, one side is 1,500 mm. Regarding the glass slip sheet that is also suitable for the above large format glass, it prevents the glass surface from being damaged by foreign matter existing at the boundary between the glass substrate and the slip sheet when transported with the slip sheet inserted. It is possible to provide a glass interleaving paper that can be reused for various purposes as a high-quality pulp raw material.
次に、本発明の実施の形態を説明する。
本発明におけるガラス合紙の坪量については、３０〜６０ｇ／ｍ2の範囲で抄造される。より好ましくは３５〜５５ｇ／ｍ2である。米坪３０ｇ／ｍ2未満では十分なクッション性を得ることができず、ガラス合紙として、特に一方の辺が１，５００ｍｍ以上の大判のガラスに用いた場合、ガラスの荷重によりクッション性が著しく損なわれ、傷入りの問題が顕在化する。また、６０ｇ／ｍ2を超えると、ガラス合紙の地合等に起因する、紙厚ムラが顕在化すると共に表面平坦性が低下し、特に接触面積の大きい一方の辺が１，５００ｍｍ以上の大判のガラスに用いた場合にガラスとの密着が生じにくくなる。さらに、離解性、搬送時の荷重も増加するため作業性も低下する。
Next, an embodiment of the present invention will be described.
About the basic weight of the glass interleaving paper in this invention, it forms in the range of 30-60 g / m < 2 >. More preferably, it is 35-55 g / m < 2 >. When the weight is less than 30 g / m 2 , sufficient cushioning properties cannot be obtained, and when used as a glass interleaving paper, especially for large-sized glass with one side of 1,500 mm or more, the cushioning properties are remarkably increased due to the load of the glass. It is damaged and the problem of scratching becomes obvious. On the other hand, if it exceeds 60 g / m 2 , unevenness of the paper thickness due to the formation of the glass interleaving paper becomes obvious and the surface flatness decreases, and in particular, one side having a large contact area is 1,500 mm or more. When used for large-sized glass, adhesion to the glass is less likely to occur. In addition, disaggregation and load at the time of transport increase, so workability also decreases.
本発明に基づくガラス合紙は、ＪＩＳＰ８２２０に準拠して離解したガラス用合紙製品離解パルプの、ＪＩＳＰ８１２１に準拠した濾水度が５００〜６８０ｍｌが望ましく、より好適には、５８０〜６７０ｍｌ、さらに好適には６１０〜６５０ｍｌである。 The glass interleaving paper according to the present invention desirably has a freeness of 500 to 680 ml, more preferably 580 to 670 ml, more preferably a disintegrating pulp for glass interleaf products disaggregated according to JISP8220. Is 610-650 ml.
濾水度が５００ｍｌ未満の原料パルプを用いたガラス合紙は、緊度が高くなるため、加圧時のクッション性が低くなり、ガラスと合紙の境界に異物が存在すると傷入りが発生する場合がある。また、紙自体の腰（剛度）が低くなり、搬送中や作業中にガラスからガラス合紙が脱落する問題が生じるおそれがある。一方、濾水度が６８０ｍｌを超えると、ガラス合紙の地合が悪くなり、本発明者等の鋭意検討で知見した、ガラス用合紙の巾方向の紙厚を２ｃｍ間隔で測定した最大隣接差が８μｍ以下かつ紙厚の最大値と最小値の差が１６μｍ以下に調整することが困難である。 Glass interleaving paper using raw pulp with a freeness of less than 500 ml has high tenacity, resulting in low cushioning properties at the time of pressurization, and if foreign matter exists at the boundary between glass and interleaving paper, scratches occur. There is a case. Further, the stiffness (rigidity) of the paper itself is lowered, and there is a possibility that a problem that the glass slip sheet is dropped from the glass during conveyance or operation. On the other hand, when the freeness exceeds 680 ml, the formation of the glass interleaving paper is deteriorated, and the maximum adjoining measured in the width direction of the glass interleaving paper at 2 cm intervals, which has been found by the inventors' diligent study. It is difficult to adjust the difference to 8 μm or less and the difference between the maximum value and the minimum value of the paper thickness to 16 μm or less.
本発明に基づく、ガラス用合紙の巾方向の紙厚は、ＪＩＳＰ８１１８に準拠した、ガラス用合紙の巾方向の紙厚を２ｃｍ間隔で測定した、隣接する測定点の最大紙厚差（以下「最大隣接差」ともいう。）が８μｍ以下、好ましくは６〜８μｍ、より好ましくは、６〜７μｍであり、かつ紙厚の最大値と最小値の差が１６μｍ以下、好適には１５μｍ以下、より好適には１４μｍ以下である。特に一方の辺が１，５００ｍｍ以上の大判のガラス用合紙では、ガラスとの接触面積が多くなるため、傷入りの問題が顕在化する。 The paper thickness in the width direction of the glass interleaving paper based on the present invention is the maximum paper thickness difference between adjacent measurement points (hereinafter referred to as the thickness in the width direction of the glass interleaving paper measured at 2 cm intervals in accordance with JISP8118). Is also 8 μm or less, preferably 6 to 8 μm, more preferably 6 to 7 μm, and the difference between the maximum value and the minimum value of the paper thickness is 16 μm or less, preferably 15 μm or less. More preferably, it is 14 μm or less. In particular, in large-sized glass slip sheets having one side of 1,500 mm or more, the contact area with the glass increases, so that the problem of scratches becomes obvious.
本発明における、ＪＩＳＰ８１１８に準拠した、ガラス用合紙の巾方向の紙厚の最大隣接差は、ガラス合紙の幅方向において、２ｃｍの間隔を開けて測定した紙厚の幅方向において隣あう測定値の差異を指し、紙厚の最大値と最小値の差は、同様に測定したガラス合紙の幅方向連続する４０箇所の紙厚における最大値と最小値の差を云う。紙厚の巾方向への測定は、紙中のフロックの大きさが約２ｃｍであるため、２ｃｍの間隔で測定を行うのが望ましい。 In the present invention, the maximum adjacent difference in the paper thickness in the width direction of the glass interleaving paper in accordance with JISP 8118 is measured in the width direction of the glass interleaving paper and adjacent in the width direction of the paper thickness measured at an interval of 2 cm. The difference between the maximum value and the minimum value of the paper thickness refers to the difference between the maximum value and the minimum value at the 40 consecutive paper thicknesses measured in the width direction of the glass interleaving paper. Measurement in the width direction of the paper thickness is desirably performed at intervals of 2 cm because the size of the floc in the paper is about 2 cm.
２ｃｍ以上の間隔で測定を行うと、紙中の凹凸を捕らえ難く最大隣接差が小さくなるため、抄紙条件ごとの差が出難い。 ２ｃｍ以下の間隔で測定を行っても、最大隣接差、最大値と最小値の差が、２ｃｍ間隔で測定した結果と変化がない。このため、２ｃｍ間隔で測定することで、最小の測定数で、信頼できる値を得ることができる。このように、測定間隔は２ｃｍ間隔が最適であるが、１．０〜４．０ｃｍの範囲内である限り、前述の目的を達成できることを知見している。 When the measurement is performed at intervals of 2 cm or more, it is difficult to catch irregularities in the paper and the maximum adjacent difference is small, so that it is difficult to produce a difference for each papermaking condition. Even when the measurement is performed at intervals of 2 cm or less, the maximum adjacent difference and the difference between the maximum value and the minimum value are not different from the results of measurement at the intervals of 2 cm. For this reason, by measuring at intervals of 2 cm, a reliable value can be obtained with the minimum number of measurements. As described above, the measurement interval is optimally 2 cm, but it has been found that the above-mentioned purpose can be achieved as long as it is within the range of 1.0 to 4.0 cm.
パルプ原料としては、清浄度が要求されるガラスに対し、漂白処理を施し樹脂分を低くコントロールさせた晒クラフトパルプ（ＮＢＫＰ、ＬＢＫＰ）を好適に用いることができる。 As the pulp raw material, bleached kraft pulp (NBKP, LBKP) obtained by performing bleaching treatment and controlling the resin content to a glass that requires cleanliness can be suitably used.
古紙からなる古紙再生パルプ（一般にＤＩＰと呼ぶ）の使用も考えられるが、古紙に異物として混入する背糊等に使われる樹脂分や、紙中に内添されたサイズ剤、紙力増強剤などの機能性薬品、塗工紙に用いられるラテックス等のバインダー成分が古紙パルプ中には多量に含まれており、樹脂分が多いとガラス表面のシラノール基に極性有機物が水素結合により強く付着し、その上にファンデルワールス力により炭化水素系の有機物層が形成されるためガラス表面を汚染する場合があり、本発明者らの知見によるとＩＳＯ６２４−１９７４のパルプ中に存在する樹脂量を測定する方法に準じて測定した紙中に含まれる樹脂分が０．２％を超えるとガラス表面を汚染させる可能性が大ききため、０．２％以下に抑えなくてはならないとの報告がなされている（特開２００６−４４６７４号公報の段落００２８参照）。そのため、ＤＩＰを使用する際には、古紙に含まれている不純物を取り除き、さらに離解した後、アルカリ等薬品を用いて、パルプ繊維から無機物や樹脂分等からなるインキ膜を取り除き、界面活性剤等に捕集させ繊維から分離除去して得られたＤＩＰを使用することが好ましい。 Recycled recycled paper pulp (generally referred to as DIP) is also considered, but the resin content used for back glue, etc. mixed into the waste paper as a foreign substance, sizing agent added inside the paper, paper strength enhancer, etc. Binder components such as latex used in functional paper and coated paper are contained in a large amount in waste paper pulp, and if there is a large amount of resin, polar organic substances adhere strongly to the silanol groups on the glass surface due to hydrogen bonding, On top of that, a hydrocarbon organic layer is formed by van der Waals force, which may contaminate the glass surface. According to the knowledge of the present inventors, the amount of resin present in ISO624-1974 pulp is measured. There is a report that if the resin content in the paper measured according to the method exceeds 0.2%, the glass surface is likely to be contaminated, so it must be kept below 0.2%. Are (see paragraph 0028 of JP-2006-44674). Therefore, when using DIP, after removing impurities contained in waste paper and further disaggregating, using an alkali or other chemicals, the ink film composed of inorganic substances and resin components is removed from the pulp fiber, and the surfactant is used. It is preferable to use a DIP obtained by collecting it in a similar manner and separating and removing it from the fiber.
本発明のガラス合紙における好適な原料パルプとして、ガラスに密着した際のガラス表面の傷入り防止機能、搬送適性、耐汚染性、密着性を向上するため、パルプ原料の平均繊維長が１．０ｍｍ以上１．６ｍｍ未満、好適には１．２〜１．６ｍｍ未満、特には、１．３〜１．５ｍｍの範囲の原料パルプを用いることが好ましい。 As a suitable raw material pulp in the glass interleaving paper of the present invention, the average fiber length of the pulp raw material is 1. in order to improve the scratch prevention function, transportability, stain resistance and adhesion of the glass surface when it is in close contact with the glass. It is preferable to use raw pulp in the range of 0 mm or more and less than 1.6 mm, preferably 1.2 to 1.6 mm, particularly 1.3 to 1.5 mm.
原料パルプの平均繊維長が１．０ｍｍ以上１．６ｍｍ未満の範囲であれば、１種又は２種以上を組み合わせて用いることができるが、好適には、樹脂含有分の少ない漂白処理パルプである、ＮＢＫＰとＬＢＫＰを選択して用いることができる。 If the average fiber length of the raw material pulp is in the range of 1.0 mm or more and less than 1.6 mm, it can be used singly or in combination of two or more, but is preferably a bleached pulp having a low resin content. , NBKP and LBKP can be selected and used.
パルプ原料の平均繊維長が１．０ｍｍ未満であると、地合の均一性は向上するものの、緊度が上がるため、十分なクッション性が得られず、圧縮された際に異物の吸収ができず、ガラス表面の傷入りが発生しやすくなる。 If the average fiber length of the pulp raw material is less than 1.0 mm, the uniformity of the formation is improved, but the tension increases, so that sufficient cushioning properties cannot be obtained, and foreign matter can be absorbed when compressed. Therefore, the glass surface is easily damaged.
一方、平均繊維長が１．６ｍｍ以上であると、パルプ繊維の結束が発生し、地合の低下を招き、表面平坦性が低下するためガラス用合紙の巾方向の紙厚を２ｃｍ間隔で測定すると最大隣接差が８μｍ以下かつ紙厚の最大値と最小値の差が１６μｍ以下に調整することが困難であるとともに、ガラス基板に対するガラス用合紙の密着性が低下して、特に一方の辺が１，５００ｍｍ以上の大判のガラス用合紙では、搬送時において横ズレによる傷入りが発生しやすくなる。また、繊維長が長いため離解時にフロックや未離解残渣を生じやすく、再利用時の妨げになる。 On the other hand, when the average fiber length is 1.6 mm or more, the binding of pulp fibers occurs, the formation is lowered, and the surface flatness is lowered, so the paper thickness in the width direction of the glass interleaving paper is 2 cm apart. When measured, it is difficult to adjust the maximum adjacent difference to be 8 μm or less and the difference between the maximum value and the minimum value of the paper thickness to be 16 μm or less, and the adhesion of the glass interleaf to the glass substrate is reduced. In large-sized glass interleaving paper having a side of 1,500 mm or more, damage due to lateral displacement is likely to occur during conveyance. Further, since the fiber length is long, flocs and undissolved residues are likely to be generated at the time of disaggregation, which hinders reuse.
好適に用いることができるＮＢＫＰとＬＢＫＰは、その配合比を５０／５０〜１５／８５重量％とすることがより好ましい。ＮＢＫＰの配合量については、１５重量％未満であると、ガラス用合紙に十分なクッション性を付与することが困難でとなり、５０重量％を超えると、パルプ繊維の結束が発生しやすくなり、搬送時において横ズレによる傷入りも発生しやすくなる傾向がある。 NBKP and LBKP that can be suitably used are more preferably 50/50 to 15/85% by weight. As for the blending amount of NBKP, if it is less than 15% by weight, it becomes difficult to impart sufficient cushioning properties to the glass interleaving paper, and if it exceeds 50% by weight, binding of pulp fibers tends to occur, There is a tendency that scratches due to lateral displacement tend to occur during transportation.
他方、ガラス合紙の表面性とクッション性の関係においては、ガラス間に圧縮された状態でのガラスと合紙との密着状態を知る指標として、加圧条件下での平滑性が測定できるマイクロトポグラフがある。ガラス合紙では、圧縮された状態での平滑性がより高いほうが、ガラスとの密着が高まるため、ガラス表面の傷入りが発生しにくくなる。合紙の少なくとも片面のマイクロトポグラフについては、搬送時の加圧力と想定される２３ｋｇｆ／ｃｍ2条件下で６．０μｍを超えると、圧縮条件下でもガラスと合紙との境界で横ズレが生じ、ガラス表面に存在するガラス粉等異物によるガラス傷入りが生じやすくなる。好ましくは、２３ｋｇｆ／ｃｍ2条件下で５．０μｍ以下である。 On the other hand, in the relationship between the surface property and the cushioning property of the glass interleaving paper, a micrometer that can measure the smoothness under the pressurizing condition as an index to know the adhesion state between the glass and the interleaving paper in a state compressed between the glasses. There is a topograph. In the glass interleaving paper, the higher the smoothness in the compressed state, the higher the adhesion with the glass, so that the glass surface is less likely to be damaged. For microtopographs on at least one side of interleaving paper, if it exceeds 6.0 μm under the 23 kgf / cm 2 condition that is assumed to be the applied pressure during conveyance, lateral misalignment occurs at the boundary between glass and interleaving paper even under compression conditions. Glass flaws easily occur due to foreign substances such as glass powder existing on the glass surface. Preferably, it is 5.0 μm or less under the condition of 23 kgf / cm 2 .
ＪＩＳ Ｚ ４５０２に準拠した水解性が１８０秒を超えると、パルパー設備での離解性が低下し減容効果が低いとともに、未離解（完全にパルプ繊維がほぐれない状態）が発生しやすいことから、パルプ原料としても再利用が困難となる。 When the water disintegrability in conformity with JIS Z 4502 exceeds 180 seconds, the disaggregation property in the pulper equipment is lowered and the volume reduction effect is low, and undisaggregation (a state in which the pulp fibers are not completely loosened) is likely to occur. Reuse as a pulp raw material becomes difficult.
本発明においては、ＪＩＳ Ｚ ４５０２に準拠した水解性が１８０秒以下、好ましくは１７０秒以下が好ましい。 In the present invention, the water disintegrability according to JIS Z 4502 is 180 seconds or less, preferably 170 seconds or less.
クッション性に寄与する要素として、坪量、平均繊維長、ガラス合紙自体の緊度、抄紙方法のほかに、パルプ繊維自体の構造がある。パルプ繊維には内腔が存在し、それ自体が潰れることによって、紙全体としてのクッション機能に繋がるため、内腔と外環となる細胞壁の厚みとの比率がクッション性にとって重要となる。そこで、パルプ繊維のクッション性を評価する指標としてルンケル比Ｒがある。ルンケル比は、繊維のルーメン（内腔）の幅Ｌと細胞壁の厚さｔによって求められる値であり、Ｒ ＝２ ・ｔ ／Ｌ によって表される。このルンケル比は、数値が低いほど同じ径に対して繊維壁の厚みが小さくなり、繊維は柔軟性を持つ。ルンケル比が０．８以下であれば、圧縮条件下でガラスとの境界にあるガラス粉等異物を紙中に吸収しやすくなる。ルンケル比が０．８以下のパルプ繊維を得るには、木材として比較的成長の早い植林木等を原料とするのが好ましい。また、クッション機能として重要となるパルプ繊維本来の形状を保つには、叩解をできるだけ抑え、原料フリーネスを５００ｍｌ以上、好適には５８０ｍｌ以上とするのが望ましい。 Factors that contribute to cushioning properties include the basis weight, average fiber length, the strength of the glass interleaf itself, and the papermaking method, as well as the structure of the pulp fiber itself. The pulp fiber has a lumen, and when the pulp fiber is crushed, it leads to a cushion function of the paper as a whole. Therefore, the ratio between the lumen and the thickness of the cell wall serving as the outer ring is important for cushioning. Therefore, there is a Runkel ratio R as an index for evaluating the cushioning properties of pulp fibers. The Runkel ratio is a value determined by the width L of the fiber lumen (lumen) and the thickness t of the cell wall, and is represented by R = 2 · t 2 / L 2. The lower the value of the Runkel ratio, the smaller the fiber wall thickness with respect to the same diameter, and the more flexible the fiber. If the Runkel ratio is 0.8 or less, it becomes easy to absorb foreign substances such as glass powder at the boundary with the glass under compression conditions. In order to obtain a pulp fiber having a Runkel ratio of 0.8 or less, it is preferable to use a planted tree or the like that grows relatively quickly as a raw material. Further, in order to maintain the original shape of the pulp fiber, which is important as a cushion function, it is desirable to suppress beating as much as possible and to make the raw material freeness 500 ml or more, preferably 580 ml or more.
クッション性を得る抄紙方式としては、円網もしくは長網により脱水し、少なくとも片面が艶面となるヤンキー乾燥機を備えたヤンキー抄紙機を採用することが好ましい。ヤンキー抄紙機を用いて製造することで、寸法安定性も向上する付帯効果を有する。 As a papermaking method for obtaining cushioning properties, it is preferable to employ a Yankee papermaking machine equipped with a Yankee dryer that is dewatered by a circular net or a long net and has at least one surface that is glossy. Manufactured using a Yankee paper machine, it has an accompanying effect that improves dimensional stability.
寸法安定性については、ヤンキー抄紙機を用いて製造することの他、パルプ原料として、使用するパルプ原料の平均繊維長を１．０ｍｍ以上１．６ｍｍ未満にすること、ＮＢＫＰとＬＢＫＰの配合割合を５０／５０〜１５／８５重量％とすることで寸法安定性の指標である水中伸度を、好ましくは２．５％以下、さらに好ましくは２．０％以下となるよう製造することが可能になる。水中伸度が２．５％を超えると、吸湿時に紙が伸び、シワ・タルミが発生する可能性が高くなる。シワ・タルミがある紙をガラス用合紙として挿入すると、ガラス基板への傷入りが発生し易くなる。 Regarding dimensional stability, in addition to manufacturing using a Yankee paper machine, as a pulp raw material, the average fiber length of the pulp raw material to be used should be 1.0 mm or more and less than 1.6 mm, and the blending ratio of NBKP and LBKP is By adjusting the weight to 50/50 to 15/85% by weight, the elongation in water, which is an index of dimensional stability, is preferably 2.5% or less, more preferably 2.0% or less. Become. If the underwater elongation exceeds 2.5%, the paper stretches during moisture absorption, and there is a high possibility that wrinkles and tarmi will occur. When paper with wrinkles and tarmi is inserted as a slip sheet for glass, the glass substrate is easily damaged.
さらに、坪量が３０〜６０ｇ／ｍ2、ＪＩＳＰ８２２０に準拠して離解したガラス用合紙製品離解パルプの、ＪＩＳＰ８１２１に準拠した濾水度が５００〜６８０ｍｌであり、ＪＩＳＰ８１１８に準拠した、ガラス用合紙の巾方向の紙厚を２ｃｍ間隔で測定した最大隣接差が８μｍ以下かつ紙厚の最大値と最小値の差が１６μｍ以下の本発明に基づくガラス合紙を得やすくなる。 Furthermore, the freezing degree of the glass pulp paper disaggregated pulp disaggregated according to JISP8220 with a grammage of 30 to 60 g / m 2 is 500 to 680 ml according to JISP8121, and the glass composite according to JISP8118. It becomes easy to obtain a glass interleaving paper based on the present invention having a maximum adjacent difference of 8 μm or less and a difference between the maximum value and the minimum value of the paper thickness of 16 μm or less as measured in the width direction of the paper at intervals of 2 cm.
また、ヤンキー抄紙機を用いて製造することで、平均繊維長が１．０ｍｍ以上１．６ｍｍ未満、ＮＢＫＰとＬＢＫＰを５０／５０〜１５／８５重量％の比率で配合しても、少なくとも片面のマイクロトポグラフが２３ｋｇｆ／ｃｍ2条件下で６．０μｍ以下となる表面平坦性が得られ、特に一方の辺が１，５００ｍｍ以上の大判のガラス用合紙においても、圧縮条件下においてガラスとの密着性とクッション性を兼ね備えた性能を持ち、搬送時等において、ガラスと合紙とが横ズレせず、さらにはガラス表面に存在するガラス粉等の異物を合紙中に吸収し、ガラス表面の傷入りを防止することができる。 Moreover, even if it mix | blends by the ratio of 50 / 50-15 / 85 weight% with an average fiber length of 1.0 mm or more and less than 1.6 mm and NBKP and LBKP by manufacturing using a Yankee paper machine, at least one side Surface flatness is obtained with a microtopograph of 6.0 μm or less under 23 kgf / cm 2 conditions, and even in large-sized glass slip sheets with one side of 1,500 mm or more, adhesion to glass under compression conditions Performance and cushioning properties, during transport and the like, the glass and interleaf do not shift laterally, and further absorbs foreign substances such as glass powder on the glass surface into the interleaf. Scratch can be prevented.
本発明におけるガラス合紙の紙面ｐＨは、５．０以上になるように調整することが好ましい。紙面ｐＨが５．０未満となるよう硫酸バンドを添加すると、パルプが凝集しフロックが発生し易くなるため地合が悪くなり、搬送時に傷が入り易くなる。硫酸バンドは、地合のことを考えると添加しないことが望ましいが、ドライヤー剥離性や他の薬品の定着を考慮すると、０．０５重量％以下の添加を行う場合がある。（なお、紙面ｐＨは紙面測定用ｐＨ計（型式ＭＰＣ、共立理化学研究所製）などで測定することができる。すなわち、前記紙面測定用ｐＨ計に付属の、ｐＨ測定範囲が４．６〜６．８であるＢＣＰ溶液での発色、またはｐＨ測定範囲が６．０〜８．０であるＢＴＢ溶液での発色を、標準板と対比させて紙面ＰＨを測定する。） The paper surface pH of the glass interleaving paper in the present invention is preferably adjusted to be 5.0 or more. If a sulfuric acid band is added so that the pH of the paper surface is less than 5.0, the pulp is agglomerated and flocs are likely to be generated. Although it is desirable not to add the sulfuric acid band in consideration of the formation, 0.05% by weight or less may be added in consideration of dryer peelability and fixing of other chemicals. (Note that the pH of the paper surface can be measured with a pH meter for paper surface measurement (model MPC, manufactured by Kyoritsu Riken) etc. That is, the pH measurement range attached to the pH meter for paper surface measurement is 4.6-6. The color development with a BCP solution of .8 or the color development with a BTB solution with a pH measurement range of 6.0 to 8.0 is compared with the standard plate to measure the paper surface PH.)
本発明においては、さらに紙中に濡れ向上剤（界面活性剤）を内添することにより、ガラス表面に紙中物質が付着しても、付着物自体に濡れ向上剤を含むため、ガラス表面の濡れ性を低下することなく、さらに水溶液によるガラスの洗浄性も向上する。 In the present invention, by further adding a wetting improver (surfactant) into the paper, even if substances in the paper adhere to the glass surface, the adhering substance itself contains the wetting improver. Without deteriorating the wettability, the glass washability with an aqueous solution is also improved.
濡れ向上剤としては、ポリオキシアルキレン脂肪酸エステル、ポリオキシアルキレンアルキルエーテル、ポリオキシエチレンノニルフェニルエーテル等の界面活性剤が挙げられる。その中でも特に、ポリオキシアルキレン脂肪酸エステルは、他の界面活性剤と比べ汎用性があり、安価であり、パルプ繊維への定着が良好であるため、パルプ繊維の離解性にも大きく寄与する。 Examples of the wetting improver include surfactants such as polyoxyalkylene fatty acid ester, polyoxyalkylene alkyl ether, and polyoxyethylene nonylphenyl ether. Among them, in particular, polyoxyalkylene fatty acid esters are more versatile than other surfactants, are inexpensive, and are well fixed to pulp fibers, and thus greatly contribute to the disaggregation of pulp fibers.
濡れ向上剤の添加量としては、０．０１〜０．５０重量％が好ましく、０．５０重量％を超えると、吸湿性が大きくなり折れシワが発生しやすくなるためガラス表面を傷つける可能性がある。一方、０．０１重量％未満では、ガラス表面に対し、その特性効果が発現しにくい。また、濡れ向上剤の添加は、合紙自体の吸水性を高める効果があるため、離解性の向上にも寄与し、特に米坪が高いほど有効である。より好適な添加量は、対パルプ０．１０〜０．３０重量％である。 The addition amount of the wetting improver is preferably 0.01 to 0.50% by weight, and if it exceeds 0.50% by weight, the hygroscopicity is increased and wrinkles are likely to occur, which may damage the glass surface. is there. On the other hand, if it is less than 0.01% by weight, the characteristic effect is hardly exhibited on the glass surface. In addition, the addition of the wetting improver has the effect of increasing the water absorption of the slip sheet itself, and therefore contributes to the improvement of disaggregation, and is particularly effective as the rice basis weight is higher. A more preferable addition amount is 0.10 to 0.30% by weight based on pulp.
内添薬品としては、濡れ向上剤のほか、サイズ剤、ドライヤー剥離剤、硫酸バンド等が使用できるが、ガラスへの転移を少なくするために、ドライヤー剥離に影響が出ない範囲で、極力少ないほうが好ましい。 In addition to wettability improvers, sizing agents, dryer strippers, sulfuric acid bands, etc. can be used as internal chemicals. However, in order to reduce the transition to glass, it is better to use as little as possible within the range that does not affect dryer stripping. preferable.
上記の説明から推測できるように、本発明に係る隣接する測定点の最大紙厚差及び紙厚の最大値と最小値の差を得るためには、坪量、パルプ原料の種別及び繊維長、濾水度、緊度、抄紙条件（とりわけヤンキー抄紙機の採用）などの選定によって可能である。 As can be inferred from the above description, in order to obtain the maximum paper thickness difference between adjacent measurement points according to the present invention and the difference between the maximum value and the minimum value of the paper thickness, the basis weight, the type of pulp raw material and the fiber length, It is possible by selecting the freeness, tightness, papermaking conditions (especially the adoption of Yankee paper machine), etc.
次に本発明に係る実施例を比較例と共に示す。得られた紙材における平均繊維長及び離解フリーネス、ルンケル比、濡れ向上剤の含有量、米坪、マイクロトポグラフ、水解性、耐汚染性、クッション性、ガラス密着性について下記の方法により評価した。結果を表１及び表２に示す。 Next, the Example which concerns on this invention is shown with a comparative example. The average fiber length and disaggregation freeness, Runkel ratio, content of wettability improver, rice tsubo, microtopograph, water disintegration property, stain resistance, cushioning property, and glass adhesion in the obtained paper material were evaluated by the following methods. The results are shown in Tables 1 and 2.
表１においては、市販されている金属合紙（市販Ａ）、金属合紙（市販Ｂ）、及び、本発明と同様にヤンキードライヤーにて乾燥処理が施され、包装用紙（手提げ袋）に供される片艶クラフト紙（市販Ｃ）を例にとり、本発明に近似の従来品として比較した。市販Ｃは、ガラスへの汚染対策が考慮されていないため、紙中の樹脂成分が多く、ガラス汚れが顕著であり、ガラス合紙への転用はできない品質であった。 In Table 1, a commercially available metal slip paper (commercial A), metal slip paper (commercial B), and a Yankee dryer are used in the same manner as in the present invention to provide a wrapping paper (hand bag). As an example, the glossy kraft paper (commercially available C) was compared as a conventional product approximate to the present invention. Since commercially available C does not take measures against contamination of glass, the resin component in the paper is large, glass stains are remarkable, and the quality cannot be diverted to glass interleaving paper.
〔坪量〕
ＪＩＳ Ｐ ８１２４に準じて測定した値である。
[Basis weight]
It is a value measured according to JIS P 8124.
〔厚み〕
ＪＩＳ Ｐ ８１１８に準じて測定した値である。
[Thickness]
It is a value measured according to JIS P 8118.
〔水解性〕
ＪＩＳ Ｚ ４５０２に準じて測定した値である。詳細には、５００ｃｃビーカーに、水３００ｃｃ（水温２０±５℃）と直径３５ｍｍ厚さ１２ｍｍの円盤状マグネット回転子とを入れる。これをマグネットスターラーに載せ、マグネット回転子の回転数を６００±１０回転／分になるように調整する。そのビーカー内に１１４ｍｍ角の試験片を投入し、試験片の離解が完全に行なわれた後、ビーカー内の回転子の回転数が５４０回転まで回復するまでの時間（秒）を計測した。
[Water disintegration]
It is a value measured according to JIS Z 4502. Specifically, 300 cc water (water temperature 20 ± 5 ° C.) and a disk-shaped magnet rotor having a diameter of 35 mm and a thickness of 12 mm are placed in a 500 cc beaker. This is placed on a magnet stirrer, and the rotational speed of the magnet rotor is adjusted to 600 ± 10 rotations / minute. A 114 mm square test piece was put into the beaker, and after the test piece was completely disaggregated, the time (seconds) until the rotational speed of the rotor in the beaker recovered to 540 rotations was measured.
〔ガラスとの密着性〕
表面に十字線を明記した縦１５００ｍｍ×横１５００ｍｍ×厚み０．７ｍｍサイズの大判および縦５００ｍｍ×横５００ｍｍ×厚み０．７ｍｍサイズの小判のガラス及び試験片を用い、十字線が重なり合うようにガラス１０枚と各ガラスの間に試験片を挿入して、ガラスセットを作成した。ガラスセットの全周囲には、外部からの塵等の混入を防ぐため透湿性のある包装材で覆った。トラックによるガラス輸送時の環境及び垂直方向の荷重、水平方向の振動を想定し、温度５０℃湿度９０％に保持した恒温高湿室内に設置した振動機の架台上に、ガラスセットを縦１５００ｍｍ×横１５００ｍｍ×厚み０．７ｍｍサイズの大判および縦５００ｍｍ×横５００ｍｍ×厚み０．７ｍｍサイズの小判のガラス面が当たるように載せ、さらにガラスセットの上面に２３ｋｇｆ／ｃｍ2の圧力となるように錘を載せ、この状態で１５Ｈｚの振動数で１００時間横振動をさせた。振動テストをした後、ガラス中心点における試験片の横ズレ量を定規で測定し、試験片１枚あたりに数値化して、下記の基準で評価した。
・大判
５：ガラスと試験片との横ズレ量が３ｍｍ未満／枚
４：ガラスと試験片との横ズレ量が３ｍｍ以上６ｍｍ未満／枚
３：ガラスと試験片との横ズレ量が６ｍｍ以上９ｍｍ未満／枚
２：ガラスと試験片との横ズレ量が９ｍｍ以上１２ｍｍ未満／枚
１：ガラスと試験片との横ズレ量が１２ｍｍ以上／枚
・小判
５：ガラスと試験片との横ズレ量が１ｍｍ未満／枚
４：ガラスと試験片との横ズレ量が１ｍｍ以上２ｍｍ未満／枚
３：ガラスと試験片との横ズレ量が２ｍｍ以上３ｍｍ未満／枚
２：ガラスと試験片との横ズレ量が３ｍｍ以上４ｍｍ未満／枚
１：ガラスと試験片との横ズレ量が４ｍｍ以上／枚
評価３〜５であれば、ガラス用合紙として合格レベルである。
[Adhesion with glass]
Using a large size glass of 1500 mm in length, 1500 mm in width, 0.7 mm in thickness, and a small size in size of 500 mm in length, 500 mm in width, and 0.7 mm in thickness, and glass 10 so that the cross lines overlap each other. A test piece was inserted between the sheet and each glass to prepare a glass set. The entire circumference of the glass set was covered with a moisture-permeable packaging material to prevent external dust and the like from entering. Assuming the environment, vertical load, and horizontal vibration when transporting glass by truck, the glass set is 1500 mm long on the frame of a vibrator installed in a constant temperature and high humidity chamber maintained at a temperature of 50 ° C and a humidity of 90%. Place the large 1500 mm horizontal x 0.7 mm thick and 500 mm long x 500 mm wide x 0.7 mm oval glass surfaces so that they come into contact with the top of the glass set so that the pressure is 23 kgf / cm 2 In this state, lateral vibration was performed at a frequency of 15 Hz for 100 hours. After the vibration test, the amount of lateral deviation of the test piece at the glass center point was measured with a ruler, digitized per test piece, and evaluated according to the following criteria.
・ Large size 5: The amount of lateral deviation between the glass and the test piece is less than 3 mm / sheet 4: The amount of lateral deviation between the glass and the test piece is 3 mm or more and less than 6 mm / sheet 3: The amount of lateral deviation between the glass and the test piece is 6 mm or more Less than 9 mm / sheet 2: Horizontal displacement amount between glass and test piece is 9 mm or more and less than 12 mm / sheet 1: Horizontal displacement amount between glass and test piece is 12 mm or more / sheet / small size 5: Horizontal displacement between glass and test piece Amount of less than 1 mm / sheet 4: A lateral displacement amount between the glass and the test piece is 1 mm or more and less than 2 mm / sheet 3: A lateral displacement amount between the glass and the test piece is 2 mm or more and less than 3 mm / sheet 2: The glass and the test piece The amount of lateral displacement is 3 mm or more and less than 4 mm / sheet 1: The amount of lateral displacement between the glass and the test piece is 4 mm or more / sheet.
〔ガラスへの傷入り性〕
前記ガラスとの密着性評価において、試験片を取り除いた後のガラスを、５００ｍｍ×５００ｍｍに９分割した。純水を用いて超音波洗浄機で洗浄した後、ガラス表面の状態を拡大顕微鏡で観察して、５００ｍｍ×５００ｍｍのガラス１枚あたりの傷の平均個数を、下記基準で評価した。
５：ガラス表面の傷が０個／枚
４：ガラス表面の傷が１個／枚
３：ガラス表面の傷が２個／枚
２：ガラス表面の傷が３個／枚
２：ガラス表面の傷が４個以上５個未満／枚
１：ガラス表面の傷が５個以上／枚
評価３〜５であれば、ガラス用合紙として合格レベルである。
[Permeability to glass]
In the evaluation of adhesion to the glass, the glass after removing the test piece was divided into 9 pieces of 500 mm × 500 mm. After washing with pure water using an ultrasonic cleaner, the state of the glass surface was observed with a magnifying microscope, and the average number of scratches per 500 mm × 500 mm glass was evaluated according to the following criteria.
5: 0 scratches / sheet on glass surface 4: 1 scratch / sheet on glass surface 3: 2 scratches / sheet on glass surface 2: 3 scratches / sheet on glass surface 2: Scratch on glass surface 4 or more and less than 5 pieces / sheet 1: If there are 5 or more scratches / sheet on the glass surface evaluation 3 to 5, it is a pass level as a slip sheet for glass.
〔ガラスへの汚染性〕
前記ガラスへの傷入り性評価において、超音波洗浄した後のガラス表面について、純水による接触角を接触角測定器で測定した。この測定値を試験片と接触する前のガラス表面の接触角と対比し、ガラス表面の接触角の変化率について、下記基準で評価した。
５：接触角の変化率が１０％未満／枚
４：接触角の変化率が１０％以上２０％未満／枚
３：接触角の変化率が２０％以上３０％未満／枚
２：接触角の変化率が３０％以上５０％未満／枚
１：接触角の変化率が５０％以上／枚
評価３〜５であれば、ガラス用合紙として合格レベルである。
[Contamination to glass]
In the evaluation of scratchability on the glass, the contact angle with pure water was measured with a contact angle measuring device on the glass surface after ultrasonic cleaning. This measured value was compared with the contact angle of the glass surface before contacting the test piece, and the rate of change of the contact angle of the glass surface was evaluated according to the following criteria.
5: Change rate of contact angle is less than 10% / sheet 4: Change rate of contact angle is 10% or more and less than 20% / sheet 3: Change rate of contact angle is 20% or more and less than 30% / sheet 2: Contact angle Change rate is 30% or more and less than 50% / sheet 1: If the change rate of contact angle is 50% or more / sheet Evaluation 3-5, it is an acceptable level as a slip sheet for glass.
本発明は、高度な表面性が必要とされるガラスの間に挿入され使用される合紙、好ましくは液晶テレビやプラズマテレビなどのフラットパネルディスプレイに用いられる、特に一方の辺が１，５００ｍｍ以上の大判のガラス基板の間に挿入され使用されるガラス用合紙として適用可能である。 INDUSTRIAL APPLICABILITY The present invention is used for interleaving paper inserted between glasses that require high surface properties, and preferably used for flat panel displays such as liquid crystal televisions and plasma televisions. It can be applied as a slip sheet for glass inserted between large-sized glass substrates.
Claims (4)
さらに、ルンケル比が０．８以下、かつ、少なくとも片面のマイクロトポグラフが２３ｋｇｆ／ｃｍ2条件下で６．０μｍ以下であり、かつ少なくとも片方が艶面を有するヤンキー紙であることを特徴とするガラス用合紙。 Adjacent paper with a pulp raw material as a main component, having a basis weight of 30 to 60 g / m 2 , and measuring the paper thickness in the width direction of the glass paper in accordance with JISP8118 at intervals of 2 cm. The maximum paper thickness difference between the measurement points is 8 μm or less, and the difference between the maximum and minimum paper thickness is 16 μm or less,
Furthermore, Runkeru ratio of 0.8 or less, and wherein at least one surface of the micro-topography is Ri der less 6.0μm at 23kgf / cm 2 under the conditions, and at least one is a Yankee paper having a gloss surface Glass paper.
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| JP2013209773A (en) * | 2012-03-30 | 2013-10-10 | Daio Paper Corp | Glass interleaving paper and laminate |
| WO2016002616A1 (en) * | 2014-07-02 | 2016-01-07 | 王子ホールディングス株式会社 | Glass slip sheet |
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| JP2013209773A (en) * | 2012-03-30 | 2013-10-10 | Daio Paper Corp | Glass interleaving paper and laminate |
| WO2016002616A1 (en) * | 2014-07-02 | 2016-01-07 | 王子ホールディングス株式会社 | Glass slip sheet |
| JP2016014205A (en) * | 2014-07-02 | 2016-01-28 | 王子ホールディングス株式会社 | Glass slip sheet |
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