JP5027998B2 - White liner manufacturing method and white liner - Google Patents
White liner manufacturing method and white liner Download PDFInfo
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- JP5027998B2 JP5027998B2 JP2005163809A JP2005163809A JP5027998B2 JP 5027998 B2 JP5027998 B2 JP 5027998B2 JP 2005163809 A JP2005163809 A JP 2005163809A JP 2005163809 A JP2005163809 A JP 2005163809A JP 5027998 B2 JP5027998 B2 JP 5027998B2
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- 239000002344 surface layer Substances 0.000 claims description 64
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- 239000003795 chemical substances by application Substances 0.000 claims description 31
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- 239000010410 layer Substances 0.000 claims description 24
- 238000002360 preparation method Methods 0.000 claims description 14
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- 239000002002 slurry Substances 0.000 claims description 4
- 239000000123 paper Substances 0.000 description 54
- 238000009877 rendering Methods 0.000 description 26
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- 239000002270 dispersing agent Substances 0.000 description 1
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- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 description 1
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- BOLDJAUMGUJJKM-LSDHHAIUSA-N renifolin D Natural products CC(=C)[C@@H]1Cc2c(O)c(O)ccc2[C@H]1CC(=O)c3ccc(O)cc3O BOLDJAUMGUJJKM-LSDHHAIUSA-N 0.000 description 1
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Landscapes
- Paper (AREA)
Description
本発明は、紙料調成工程で、表層用のパルプスラリーに蛍光消去剤を連続添加する白ライナーの製造方法及び白ライナーに関し、さらに詳細には、白ライナーの演色の問題がなく、安定した色調を有し、かつ地合いが良好な白ライナーの製造方法及び白ライナーに関する。 The present invention relates to a white liner production method and a white liner in which a fluorescent quenching agent is continuously added to a pulp slurry for a surface layer in a paper stock preparation step, and more specifically, there is no problem of color rendering of the white liner and is stable. The present invention relates to a method for producing a white liner having a color tone and good texture, and a white liner.
段ボールは、通常、コルゲート処理が施された中芯と中芯を挟持する２枚のライナーとで構成されている。また、ライナーは、晒パルプを主原料とする原料が表層（ライナーの表面となる最外層）に使用されている白ライナーと、未晒パルプ（未晒パルプの色調は茶系色）を主原料とする原料が表層に使用されている未晒ライナーとに大別される。 Corrugated cardboard is usually composed of a corrugated core and two liners sandwiching the core. In addition, the liner is made mainly of a white liner that uses bleached pulp as the main raw material for the surface layer (the outermost layer that becomes the surface of the liner) and unbleached pulp (the color of the unbleached pulp is a tea-based color). Are roughly classified into unbleached liners used for the surface layer.
また、白ライナーは、通常、表層には、バージンパルプや、脱墨処理あるいは漂白処理等が施された白色度が高い古紙パルプが用いられ、表層以外の層には脱墨処理あるいは漂白処理等が施されていない古紙パルプが用いられている。 In addition, the white liner usually uses virgin pulp or waste paper pulp with high whiteness subjected to deinking treatment or bleaching treatment for the surface layer, and deinking treatment or bleaching treatment for layers other than the surface layer. Waste paper pulp that has not been subjected to is used.
近年、地球環境保護の観点から、木材資源の節約や紙のリサイクルが推奨され、使用済みの古紙を原料とした古紙パルプが広く用いられるようになってきている。しかし、古紙パルプは、一般にバージンパルプより強度が低いため、ある程度の強度を必要とする白ライナーには、古紙パルプを高率配合することが難しい。そこで、例えば特許文献１に示されるように、古紙を含むパルプを洗浄することにより濾水度を高くした後、叩解により濾水度を低くすることで、板紙の剛度を向上させる技術が提案され、古紙の再利用を促進している。 In recent years, from the viewpoint of protecting the global environment, saving of wood resources and paper recycling have been recommended, and waste paper pulp made from used waste paper has been widely used. However, since waste paper pulp is generally lower in strength than virgin pulp, it is difficult to blend waste paper pulp with a white liner that requires a certain level of strength. Thus, for example, as shown in Patent Document 1, after increasing the freeness by washing pulp containing waste paper, a technique for improving the rigidity of the paperboard by reducing the freeness by beating is proposed. , Promoting the reuse of waste paper.
一方、紙は印刷適性を向上させることを目的として、表面サイズ剤や、顔料を主成分とする塗工剤が紙の表面に塗工される場合があるが、この際、紙の白色度を向上させるために、蛍光染料が表面サイズ剤や塗工剤に多量に添加されることがある。また、特にコート紙は、パルプスラリーに蛍光染料を添加して、パルプの白色度を高くし、紙の白色度を向上させることもある。 On the other hand, for the purpose of improving printability, paper may be coated with a surface sizing agent or a pigment-based coating agent on the surface of the paper. In order to improve, fluorescent dyes may be added in large amounts to surface sizing agents and coating agents. In particular, the coated paper may add a fluorescent dye to the pulp slurry to increase the whiteness of the pulp and improve the whiteness of the paper.
また、紙が古紙として回収されたときは、このような蛍光染料が添加された紙と、蛍光染料が添加されていない紙とが混在しており、これらを種別ごとに選別することは非常に困難である。 In addition, when paper is collected as waste paper, there is a mixture of paper with fluorescent dyes added and paper without fluorescent dyes, and it is very difficult to sort them by type. Have difficulty.
このため、白ライナーの表層用パルプとして、蛍光染料が添加された古紙を高率配合した古紙パルプを使用してパルプスラリーが調整されると、古紙に添加された蛍光染料が古紙パルプ中に含まれるため、このようなパルプスラリーを用いて抄造された白ライナーには、蛍光染料に由来する蛍光が残る。このため光源によって色調が異なって見える演色性の問題を引き起こしていた。 For this reason, when the pulp slurry is prepared using waste paper pulp containing a high percentage of waste paper containing fluorescent dye as the surface layer pulp of the white liner, the waste paper pulp contains the fluorescent dye added to waste paper. Therefore, the fluorescence derived from the fluorescent dye remains on the white liner made using such a pulp slurry. For this reason, a color rendering problem that the color tone is different depending on the light source is caused.
そこで、例えば特許文献２に示されるように、高濃度の一定量の古紙パルプに、一定量の蛍光消去剤を均一に混合して古紙に由来する蛍光を消去する技術が提案されている。しかし、上述したように古紙をその種別ごとに選別することは非常に困難であるため、古紙パルプには品質の異なる多種の古紙が使用され、古紙パルプの品質にばらつきが生じることがある。すなわち、一定量の古紙パルプであっても、これに含まれる蛍光染料の量は一定になるとは限らない。従って、特許文献２に記載されている方法では、蛍光の消去にムラができてしまい、安定した色調の白ライナーを得難く、また演色性の問題を完全に解決するものではなかった。 Thus, for example, as shown in Patent Document 2, a technique has been proposed in which a certain amount of a fluorescent quenching agent is uniformly mixed with a certain amount of used paper pulp having a high concentration to erase fluorescence derived from the used paper. However, as described above, since it is very difficult to sort used paper according to its type, various types of used paper having different qualities are used for the used paper pulp, and the quality of the used paper pulp may vary. That is, even if a certain amount of waste paper pulp is used, the amount of fluorescent dye contained therein is not always constant. Therefore, the method described in Patent Document 2 causes unevenness in the elimination of fluorescence, making it difficult to obtain a white liner with a stable color tone, and does not completely solve the problem of color rendering.
従って、所望とする蛍光消去を行おうとすると、蛍光消去剤の添加量を増加させなければならず、このためパルプの白色度が低下してしまうと共に、パルプのセルロースそのものに損傷が起こり、パルプが低質な品位のものになってしまうという問題もあった。 Therefore, if the desired fluorescent quenching is to be performed, the amount of fluorescent quenching agent added must be increased, which reduces the whiteness of the pulp and damages the pulp cellulose itself. There was also a problem that it would be of low quality.
さらにまた、白ライナーの製造ロットによっても演色性の問題が生じ、抄造された白ライナーの色調の違いの問題はより顕著なものとなっていた。
本発明は、上述したような実情に鑑みてなされたもので、その目的とするところは、地合いが良好で、かつ古紙パルプが高率配合されたパルプスラリーを表層に用いても演色の問題が少ない白ライナーを提供することにある。 The present invention has been made in view of the above-described circumstances, and the object of the present invention is that there is a problem of color rendering even if a pulp slurry having a good texture and containing a high percentage of waste paper pulp is used for the surface layer. To provide fewer white liners.
本発明の上記目的は、少なくとも紙料調成工程と、抄紙工程とを経て単層又は複数層の紙層を有するように抄紙される白ライナーの製造方法において、前記白ライナーの表層用のパルプスラリーとして、コート古紙やアート古紙を原料とした古紙パルプが５０重量％以上配合され、前記白ライナーの表層の灰分を１５重量％以上含有させ、前記表層用のパルプスラリーが滞留時間を有する紙料調成工程で、前記表層用のパルプスラリーに蛍光消去剤が連続添加されており、該蛍光消去剤の添加量が、前記抄紙工程を経た後の前記白ライナーの表層面のマクベス社製カラーアナライザーにより測定したＵＶ−ＩＮ−ＢＲＴとＵＶ−ＯＵＴ−ＢＲＴとの差である蛍光強度の測定結果に基づいて、前記蛍光強度が１０％以下となるように随時調整されていることを特徴とする白ライナーの製造方法を提供することによって、達成される。 The object of the present invention is to provide a white liner surface layer pulp in a method for producing a white liner which has a single layer or a plurality of paper layers through at least a stock preparation step and a paper making step. As a slurry, a paper stock containing 50% by weight or more of waste paper pulp made from coated waste paper or waste art paper, containing 15% by weight or more of the ash content of the surface layer of the white liner, and the pulp slurry for the surface layer has a residence time In the preparation step, a fluorescent erasing agent is continuously added to the pulp slurry for the surface layer, and the amount of the fluorescent erasing agent added is a Macbeth color analyzer on the surface layer of the white liner after the paper making step. Based on the measurement result of the fluorescence intensity, which is the difference between UV-IN-BRT and UV-OUT-BRT, measured as described above, the fluorescence intensity is adjusted as needed to be 10% or less. By providing a method for producing a white liner, characterized by that, it is achieved.
また、本発明の上記目的は、少なくとも紙料調成工程と、抄紙工程とを経て単層又は複数層の紙層を有するように抄紙される白ライナーであって、前記白ライナーの表層用のパルプスラリーとして、コート古紙やアート古紙を原料とした古紙パルプが５０重量％以上配合され、前記白ライナーの表層の灰分が１５重量％以上であり、前記表層用のパルプスラリーが滞留時間を有する紙料調成工程で、表層用のパルプスラリーに蛍光消去剤が、前記白ライナーの表層面のマクベス社製カラーアナライザーにより測定したＵＶ−ＩＮ−ＢＲＴとＵＶ−ＯＵＴ−ＢＲＴとの差である蛍光強度が１０％以下となるように連続添加されたことを特徴とする白ライナーを提供することによって、効果的に達成される。
The above-mentioned object of the present invention is a white liner that is made to have a single layer or a plurality of paper layers through at least a paper preparation step and a paper making step, and is used for the surface layer of the white liner. As a pulp slurry, a paper pulp containing 50% by weight or more of waste paper pulp made from coated waste paper or art waste paper, a ash content of the surface layer of the white liner is 15% by weight or more, and the pulp slurry for the surface layer has a residence time in RyochoNaru step, the fluorescence intensity fluorescent quencher to the pulp slurry for the surface layer is the difference between the UV-iN-BRT and UV-OUT-BRT measured by Macbeth color analyzer of surface layer of the white liner Is effectively achieved by providing a white liner characterized by being continuously added so as to be 10% or less.
本発明に係る白ライナーの製造方法によれば、抄紙工程を経た後の白ライナーの表層面の蛍光強度の測定結果に基づいて、紙料調成工程で表層用のパルプスラリーに、蛍光消去剤を随時調整しながら連続添加するので、表層用パルプとして、品質の異なる古紙パルプを用いてパルプスラリーが調整され、パルプスラリーの品質にばらつきが生じても、蛍光の消去にムラがなくなり、安定した色調の白ライナーを得ることができ、また演色の問題もなくなる。 According to the method for producing a white liner according to the present invention, based on the measurement result of the fluorescence intensity of the surface of the white liner after passing through the paper making process, the pulp eraser for the surface layer in the paper preparation process, As the pulp for the surface layer, pulp slurries are adjusted using waste paper pulp of different quality, and even if the quality of the pulp slurry varies, there is no unevenness in the elimination of fluorescence and stable. A white liner of a color tone can be obtained, and the problem of color rendering is eliminated.
また、本白ライナーの製造方法によれば、蛍光消去剤の添加量を必要最小限とすることができるので、パルプの品質を維持することができる。さらにまた、本白ライナーの製造方法によれば、製造ロットが異なっても、同じ色調である白ライナーを製造することができる。 Moreover, according to the manufacturing method of this white liner, since the addition amount of a fluorescence quencher can be made minimum necessary, the quality of a pulp can be maintained. Furthermore, according to the manufacturing method of the present white liner, a white liner having the same color tone can be manufactured even if the manufacturing lot is different.
また、蛍光消去剤は、表層用のパルプスラリーの紙料調成工程で、パルプスラリーが滞留時間を有する箇所に添加することによって、蛍光消去剤がより効果的に作用するようになるので、白ライナーの色調をより安定させることができ、演色の問題もより少なくなる。 In addition, since the fluorescent quenching agent acts more effectively by adding it to the part where the pulp slurry has a residence time in the paper stock preparation step of the pulp slurry for the surface layer, The color tone of the liner can be made more stable, and the problem of color rendering is also reduced.
また、表層用のパルプスラリーに、古紙パルプを５０重量％以上配合して、灰分を１５重量％以上含有させることによって、白ライナーの地合いを良好なものとすることができる。 Moreover, the texture of a white liner can be made favorable by mix | blending 50 weight% or more of used paper pulp with the pulp slurry for surface layers, and making it contain 15 weight% or more of ash.
さらにまた、本発明に係る白ライナーの製造方法によって製造された白ライナーは、マクベス社製カラーアナライザーにより測定したＵＶ−ＩＮ−ＢＲＴとＵＶ−ＯＵＴ−ＢＲＴとの差である蛍光強度が、１０％以下となるように調整することによって、目視演色性を少なくすることができるので、白ライナーに演色が生じても実用上の問題はなくなる。 Furthermore, white liner manufactured by the manufacturing method of the white liner according to the present invention, fluorescence intensity is the difference between the UV-IN-BRT and UV-OUT-BRT measured by Macbeth Co. color analyzer, 10% The visual color rendering properties can be reduced by adjusting so as to be as follows, so that there is no practical problem even if color rendering occurs in the white liner.
以下、本発明に係る白ライナーの製造方法及び白ライナーについて、白ライナーが表層及び裏層の２層の紙層を有する場合を例に詳細に説明する。なお、本発明は必ずしも以下の実施形態に限定されるものではなく、特許請求の範囲を逸脱しない範囲において、その構成を適宜変更できることはいうまでもない。 Hereinafter, the white liner production method and the white liner according to the present invention will be described in detail by taking, as an example, a case where the white liner has two paper layers, a surface layer and a back layer. It should be noted that the present invention is not necessarily limited to the following embodiments, and it goes without saying that the configuration can be appropriately changed without departing from the scope of the claims.
本発明に係る白ライナーの製造方法（以下、「本製造方法」と言う。）は、少なくとも紙料調成工程と抄紙工程とを経て、表層及び裏層の２層の紙層を有する白ライナーを製造する方法である。 The white liner production method according to the present invention (hereinafter referred to as “the present production method”) includes at least a paper stock preparation step and a paper making step, and a white liner having two paper layers, a front layer and a back layer. It is a method of manufacturing.
本製造方法は、紙料調成工程で、表層用のパルプスラリーに蛍光消去剤を連続添加して本白ライナーを抄造する製造方法であって、この蛍光消去剤の添加量を、抄紙工程を経た後の本白ライナーの表層面の蛍光強度を測定した結果に基づいて随時調整することを特徴とする。 This manufacturing method is a manufacturing method for making a white liner by continuously adding a fluorescent quenching agent to a pulp slurry for a surface layer in a stock preparation step, and adding the amount of the fluorescent quenching agent to the paper making process. It adjusts at any time based on the result of having measured the fluorescence intensity of the surface layer surface of this white liner after passing.
従って、本製造方法は、表層用のパルプスラリーとして、多種の古紙が使用された品質の異なる古紙パルプが用いられ、パルプスラリーの品質にばらつきが生じても、古紙に添加された蛍光染料に由来する蛍光をムラなく消去することができるので、本製造方法により製造された白ライナー（以下、「本白ライナー」と言う。）は、安定した色調を有し、また演色の問題も減少する。 Therefore, this manufacturing method is derived from fluorescent dyes added to waste paper even when the quality of the pulp slurry varies, as waste pulp of different quality using various waste paper is used as the surface layer pulp slurry. Therefore, the white liner manufactured by the present manufacturing method (hereinafter referred to as “main white liner”) has a stable color tone, and the problem of color rendering is also reduced.
また、本製造方法では、表層用のパルプスラリーに添加する蛍光消去剤の添加量を随時調整しながら連続添加するので、蛍光消去剤の添加量が過剰となることがなく、その量を必要最小限とすることができる。これによりパルプの品質低下を最低限とすることができる。 In addition, in this production method, the addition amount of the fluorescent quenching agent added to the pulp slurry for the surface layer is continuously added while adjusting as needed, so that the addition amount of the fluorescent quenching agent does not become excessive, and the amount is minimized. Limit. Thereby, the quality degradation of the pulp can be minimized.
さらにまた、本製造方法は、抄紙工程を経た後の白ライナーの表層面の蛍光強度の測定結果に基づいて、表層用のパルプスラリーに添加する蛍光消去剤の添加量を調整するので、製造ロットが異なっても、本白ライナーの色調を同一のものとすることができる。 Furthermore, the present production method adjusts the amount of the fluorescent quencher added to the pulp slurry for the surface layer based on the measurement result of the fluorescence intensity of the surface surface of the white liner after the paper making process. Even if they are different, the color tone of the white liner can be made the same.
また、蛍光消去剤は、紙料調成工程で、パルプスラリーが滞留時間を有する箇所、例えばマシンタンク、チェスト等に添加されると、蛍光消去剤がより効果的に作用するようになる。これにより、白ライナーの色調をより安定させることができ、また演色の問題もより少なくなる。 In addition, when the fluorescent slurry is added to a part where the pulp slurry has a residence time, for example, a machine tank, a chest, or the like, in the stock preparation step, the fluorescent quencher works more effectively. As a result, the color tone of the white liner can be further stabilized, and the problem of color rendering can be reduced.
蛍光消去剤としては、例えばニトロ化合物、キノン類、テトラシアノキノジメタン類、アミニウム類、ジインモニウム類等の電子受容性の化合物群、ヒドラジン類、ヒドラジド類、ヒドロキシルアミン類、ハイドロキノン類、四置換ホウ素陰イオン類等の電子供与性化合物群、フェロセン等のメタロセン類、ビス（１，２−ベンセンジチオライト）ニッケル類、アゾ色素の重金属錯体類、フォルマザン重金属錯体、ジピロメテン金属錯体類、ポルフィリン重金属錯体類、重金属フタロシアニン類、重金属ナフタロシアニン類等の重金属錯体のような高周期元素を含有する化合物群等、公知の種々のものを添加することができる。 Examples of the fluorescent quencher include electron-accepting compounds such as nitro compounds, quinones, tetracyanoquinodimethanes, aminiums, diimmoniums, hydrazines, hydrazides, hydroxylamines, hydroquinones, tetrasubstituted boron. Electron donating compounds such as anions, metallocenes such as ferrocene, bis (1,2-benzenedithiolite) nickel, heavy metal complexes of azo dyes, formazan heavy metal complexes, dipyrromethene metal complexes, porphyrin heavy metal complexes Various known compounds such as compounds containing high-period elements such as heavy metal complexes such as heavy metal phthalocyanines and heavy metal naphthalocyanines can be added.
本白ライナーの表層用のパルプスラリーには、古紙パルプが５０重量％以上配合されており、このパルプスラリーを用いて抄紙された本白ライナーの表層は、ＪＩＳ−Ｐ８２０４に基づく灰分（以下、単に「灰分」と言う。）を１５重量％以上含有している。このように表層用のパルプスラリーに、古紙パルプが５０重量％以上配合されていると、本白ライナーの表層の灰分を１５重量％以上含有させることができるので、本白ライナーの地合いを向上させることができる。なお、後述する実施例で示すように、古紙パルプの配合量が５０重量％未満であると、本白ライナーの表層の灰分を１５重量％以上含有させることが難しくなり、本白ライナーの地合いを向上させることが難しくなる。 The pulp slurry for the surface layer of the white liner contains 50% by weight or more of recycled paper pulp. The surface layer of the white liner made using this pulp slurry has an ash content based on JIS-P8204 (hereinafter, simply referred to as “white paper liner”). (Referred to as “ash”). Thus, when used paper pulp is blended in the surface layer pulp slurry by 50% by weight or more, ash content of the surface layer of the white liner can be contained by 15% by weight or more, thereby improving the texture of the white liner. be able to. In addition, as shown in the Example mentioned later, when the compounding quantity of used paper pulp is less than 50 weight%, it becomes difficult to contain 15 weight% or more of the ash content of the surface layer of this white liner, and the texture of this white liner is improved. It becomes difficult to improve.
表層用のパルプスラリーに配合される古紙パルプの原料は特に限定されるものではなく、例えば上白、コート、白アート、カード、特白、中白、模造、白マニラ等の公知の種々のものを使用することができるが、これらの中でも特に、灰分を多量に含むコート古紙や白アート古紙を使用することが好ましい。なお、これらの原料は単独で使用しても良いし、２種以上を混合して使用しても良い。 There are no particular restrictions on the raw material pulp used in the pulp slurry for the surface layer, and various known materials such as upper white, coat, white art, card, white, medium white, imitation, white manila, etc. Of these, it is particularly preferable to use coated old paper or white art waste paper containing a large amount of ash. In addition, these raw materials may be used independently and may mix and use 2 or more types.
なお、表層用のパルプスラリーは、古紙パルプが５０重量％以上配合されていれば、残りの原料パルプは、特に限定されるものではないが、白色度の高い晒パルプが好ましく、例えば針葉樹晒クラフトパルプ（ＮＢＫＰ）、広葉樹晒クラフトパルプ（ＬＢＫＰ）等の化学パルプやグランドパルプ（ＧＰ）、リファイナーグランドパルプ（ＲＧＰ）、サーモメカニカルパルプ（ＴＭＰ）、ケミサーモメカニカルパルプ（ＣＴＭＰ）等の機械パルプ等、公知の種々の原料パルプを単独で、あるいは２種以上を混合して使用することができる。 The pulp slurry for the surface layer is not particularly limited as long as the waste paper pulp is blended in an amount of 50% by weight or more, but the bleaching pulp having high whiteness is preferable, for example, softwood bleaching craft. Chemical pulp such as pulp (NBKP), hardwood bleached kraft pulp (LBKP), mechanical pulp such as ground pulp (GP), refiner ground pulp (RGP), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), etc. Various known raw material pulps can be used alone or in admixture of two or more.
本白ライナーは、マクベス社製カラーアナライザーにより測定した表層面の蛍光強度が１０％以下となるように、すなわち紫外線を含有する光源による白色度（ＵＶ−ＩＮ−ＢＲＴ）と、紫外線を含有しない光源による白色度（ＵＶ−ＯＵＴ−ＢＲＴ）との差が１０％以下となるように、上述した蛍光消去剤の添加量を調整することによって調整されている。この差が１０％以下であれば、目視演色性が少ないので、白ライナーに演色が生じても実用上問題ない。一方、この差が１０％を超えると、演色が大きくなるため好ましくない。 This white liner, as the fluorescence intensity of the surface layer was measured by Macbeth color analyzer is 10% or less, i.e. whiteness by a light source containing an ultraviolet and (UV-IN-BRT), containing no ultraviolet light source It is adjusted by adjusting the addition amount of the above-mentioned fluorescent quenching agent so that the difference from the whiteness (UV-OUT-BRT) due to is 10% or less. If this difference is 10% or less, there is little visual color rendering property, so even if color rendering occurs in the white liner, there is no practical problem. On the other hand, if this difference exceeds 10%, the color rendering becomes large, which is not preferable.
なお、本白ライナーの表層用のパルプスラリーには、上述した蛍光消去剤の他、本発明に影響のない範囲内で中性サイズ剤、ポリマーサイズ剤、酸性サイズ剤等のサイズ剤や、填料が添加されていても良い。さらに、その他、填料分散剤、増粘剤、流動性改良剤、消泡剤、抑泡剤、離型剤、浸透剤、着色染料、着色顔料、紫外線吸収剤、酸化防止剤、防腐剤、防バイ剤、耐水化剤等の公知の種々の添加剤が添加されていても良い。 In addition, in the pulp slurry for the surface layer of the white liner, in addition to the above-described fluorescent quenching agent, a sizing agent such as a neutral sizing agent, a polymer sizing agent, and an acidic sizing agent within a range not affecting the present invention, and a filler May be added. In addition, filler dispersants, thickeners, fluidity improvers, antifoaming agents, antifoaming agents, mold release agents, penetrating agents, coloring dyes, coloring pigments, ultraviolet absorbers, antioxidants, preservatives, anti-proofing agents Various known additives such as a bi-agent and a water-resistant agent may be added.
本白ライナーの裏層のパルプスラリーの原料パルプとしては、特に限定されるものではないので、例えばＮＢＫＰや、ＬＢＫＰ等の晒パルプや、針葉樹未晒クラフトパルプ（ＮＵＫＰ）や、広葉樹未晒クラフトパルプ（ＬＵＫＰ）等の未晒パルプ、脱墨パルプ、古紙パルプ、あるいはケナフ、竹、麻、藁等の公知の非木材パルプ等の公知の種々の原料パルプを単独で、あるいは２種以上を混合して使用することができる。 The raw pulp of the back layer of the white liner is not particularly limited. For example, bleached pulp such as NBKP and LBKP, softwood unbleached kraft pulp (NUKP), and hardwood unbleached kraft pulp (LUKP) or other unbleached pulp, deinked pulp, waste paper pulp, or known non-wood pulp such as kenaf, bamboo, hemp, straw, etc., alone or in combination of two or more Can be used.
また、裏層のパルプスラリーにも、例えば染料、ｐＨ調整剤、消泡剤、ピッチコントロール剤、スライムコントロール剤等の公知の種々の添加剤を使用目的やニーズに応じて適宜添加することができる。 Also, various known additives such as dyes, pH adjusters, antifoaming agents, pitch control agents, slime control agents can be appropriately added to the pulp slurry of the back layer depending on the purpose of use and needs. .
本白ライナーの抄紙方法については、特に限定されるものではないので、酸性抄紙法、中性抄紙法、アルカリ性抄紙法のいずれであっても良い。また、本白ライナーは、例えば長網抄紙機、ツインワイヤー抄紙機、円網抄紙機、円網短網コンビネーション抄紙機等の公知の種々の抄紙機を使用して抄紙される。 The paper making method of the white liner is not particularly limited, and any of acidic paper making method, neutral paper making method and alkaline paper making method may be used. The white liner is produced using various known paper machines such as a long net paper machine, a twin wire paper machine, a circular net paper machine, and a short net combination machine.
なお、本製造方法は、上述したように表層及び裏層の２層の紙層から成るものに限定されるものではなく、この他、単層から成るもの、表層、表下層（表層のすぐ下の層）、及び裏層の３層の紙層を有するもの、あるいは４層以上の紙層を有するものであっても適用でき、同様の効果を得ることができる。 In addition, this manufacturing method is not limited to what consists of two paper layers of a surface layer and a back layer as mentioned above, In addition, what consists of a single layer, surface layer, surface layer (immediately under the surface layer) The present invention can be applied to those having three paper layers as the back layer and the back layer, or those having four or more paper layers, and the same effect can be obtained.
以下、本製造方法及び本白ライナーの効果を確認するために、以下のような試料を作成し、地合い、演色性、及び演色性のばらつきを評価する試験を行った。なお、本発明はこの実施例に限定されるものではない。 Hereinafter, in order to confirm the effects of the present production method and the present white liner, the following samples were prepared and tested for evaluating the texture, color rendering properties, and variations in color rendering properties. In addition, this invention is not limited to this Example.
本発明に係る６種類の白ライナー（これを「実施例１」ないし「実施例６」とする。）と、この試料と比較検討するための６種類の白ライナー（これを「比較例１」ないし「比較例６」とする。）とを作製した。 Six types of white liners (referred to as “Example 1” to “Example 6”) according to the present invention and six types of white liners for comparison with this sample (referred to as “Comparative Example 1”). To “Comparative Example 6”).
［実施例１］表層用のパルプスラリーとして、ＬＢＫＰ（カナダ標準濾水度（ＣＳＦ）５５０ｍｌ）５０重量％と、コート古紙４０重量％と、アート古紙１０％とを配合したものに、硫酸バンド４０ｋｇ／ｔ、サイズ剤（近代化学工業株式会社製Ｒ５０）８ｋｇ／ｔを添加したものを用い、また、裏層用のパルプスラリーとして、段ボール古紙４０重量％と、雑誌古紙６０重量％とを配合したものに、硫酸バンド４０ｋｇ／ｔ、サイズ剤１０ｋｇ／ｔを添加したものを用いて、抄紙機によって表層１層及び裏層の３層の計４層の紙層を有し、坪量が２１０ｇ／ｍ２である白ライナーを抄造した。 [Example 1] As a pulp slurry for the surface layer, a blend of 50% by weight of LBKP (Canadian Standard Freeness (CSF) 550ml), 40% by weight of coated waste paper, and 10% of waste art paper, 40kg of sulfuric acid band / T, a sizing agent (R50 manufactured by Modern Chemical Industry Co., Ltd.) 8 kg / t added, and 40% by weight of used corrugated paper and 60% by weight of used magazine paper were blended as the pulp slurry for the back layer. Using a paper machine with a sulfuric acid band added at 40 kg / t and a sizing agent at 10 kg / t, the paper machine has a total of four paper layers, one surface layer and three back layers, and a basis weight of 210 g / t. A white liner of m 2 was made.
このとき、この抄造された白ライナーの表層の色調が、白色度：６０％、ｂ値：−１．０となるように染料（日本化薬株式会社製カヤフェクトブルーＲＦｌｉｑｕｉｄ１００）で調整した。また、３０分ごとに白ライナーをサンプリングし、マクベス社製カラーアナライザーにより測定した表層面の蛍光強度が２％となるように、蛍光消去剤をマシンタンクに、その量を随時調整しながら連続添加した。なお、１２時間連続生産し、表層の原料に対する蛍光消去剤の平均添加量は５．２ｋｇ／ｔであった。 At this time, the color tone of the surface layer of the produced white liner was adjusted with a dye (Kayafect Blue RFliquid 100 manufactured by Nippon Kayaku Co., Ltd.) so that the whiteness was 60% and the b value was −1.0. Also, white liner was sampled every 30 minutes, as the fluorescence intensity of the surface layer was measured by Macbeth color analyzer is 2% to the machine tank fluorescence quencher, continuously added while adjusting the amount needed did. In addition, it produced continuously for 12 hours and the average addition amount of the fluorescence quencher with respect to the raw material of a surface layer was 5.2 kg / t.
［実施例２］表層用のパルプスラリーとして、ＬＢＫＰ（ＣＳＦは５５０ｍｌ）４０重量％と、コート古紙４０重量％と、アート古紙２０重量％とを配合したものを用いたこと以外は、実施例１と同様の操作により白ライナーを抄造した。 [Example 2] Example 1 except that 40% by weight of LBKP (CSF is 550 ml), 40% by weight coated waste paper, and 20% by weight art waste paper were used as the surface layer pulp slurry. A white liner was made in the same manner as described above.
［実施例３］表層用のパルプスラリーとして、ＬＢＫＰ（ＣＳＦは５５０ｍｌ）３０重量％と、コート古紙４０重量％と、アート古紙３０重量％とを配合したものを用いたこと以外は、実施例１と同様の操作により白ライナーを抄造した。 [Example 3] Example 1 except that 30% by weight of LBKP (CSF is 550 ml), 40% by weight of used coated paper, and 30% by weight of used art paper are used as the surface layer pulp slurry. A white liner was made in the same manner as described above.
［実施例４］マクベス社製カラーアナライザーにより測定した表層面の蛍光強度が３％となるように、表層用のパルプスラリーに蛍光消去剤を、その量を随時調整しながら連続添加したこと以外は、実施例３と同様の操作により白ライナーを抄造した。 [Example 4] as the fluorescence intensity of the surface layer was measured by Macbeth color analyzer is 3%, the fluorescence quencher in the pulp slurry for the surface layer, except that was continuously added while adjusting the amount needed A white liner was made in the same manner as in Example 3.
［実施例５］マクベス社製カラーアナライザーにより測定した表層面の蛍光強度が４％となるように、表層用のパルプスラリーに蛍光消去剤を、その量を随時調整しながら連続添加したこと以外は、実施例３と同様の操作により白ライナーを抄造した。 [Example 5] Except that the fluorescence quenching agent was continuously added to the pulp slurry for the surface layer while adjusting the amount as needed so that the fluorescence intensity of the surface layer surface measured by a color analyzer manufactured by Macbeth was 4%. A white liner was made in the same manner as in Example 3.
［実施例６］表層用のパルプスラリーとして、ＬＢＫＰ（ＣＳＦは５５０ｍｌ）２０重量％と、コート古紙４０重量％と、アート古紙４０重量％とを配合したものを用いたこと、マクベス社製カラーアナライザーにより測定した表層面の蛍光強度が９％となるように、表層用のパルプスラリーに蛍光消去剤を、その量を随時調整しながら連続添加したこと、及び蛍光消去剤の添加場所を種箱としたこと以外は、実施例１と同様の操作により白ライナーを抄造した。 [Example 6] As a pulp slurry for the surface layer, a blend of 20% by weight of LBKP (CSF is 550 ml), 40% by weight of used coated paper, and 40% by weight of used art paper , a color analyzer manufactured by Macbeth Co., Ltd. Fluorescence quencher was continuously added to the pulp slurry for the surface layer while adjusting the amount as needed so that the fluorescence intensity of the surface layer surface measured by 1 was 9%, and the addition place of the fluorescence quencher was the seed box A white liner was made in the same manner as in Example 1 except that.
［比較例１］蛍光消去剤を、その量を随時調整しながら連続添加することは行なわず、５．２ｋｇ／ｔの一定量を添加したこと以外は、実施例１と同様の操作により白ライナーを抄造した。 [Comparative Example 1] A white liner was prepared in the same manner as in Example 1 except that a fluorescent quenching agent was not continuously added while adjusting its amount as needed, but a fixed amount of 5.2 kg / t was added. Made.
［比較例２］蛍光消去剤を種箱に添加したこと以外は、比較例１と同様の操作により白ライナーを抄造した。 [Comparative Example 2] A white liner was made in the same manner as in Comparative Example 1 except that a fluorescent quencher was added to the seed box.
［比較例３］蛍光消去剤をファンポンプに添加したこと以外は、比較例１と同様の操作により白ライナーを抄造した。 [Comparative Example 3] A white liner was made in the same manner as in Comparative Example 1 except that a fluorescent quencher was added to the fan pump.
［比較例４］蛍光消去剤は添加せず、表層用のパルプスラリーとして、ＬＢＫＰ（ＣＳＦは５５０ｍｌ）６０重量％と、コート古紙３０重量％と、アート古紙１０重量％とを配合したものを用いたこと以外は、実施例１と同様の操作により白ライナーを抄造した。 [Comparative Example 4] No fluorescent quencher was added, and as a pulp slurry for the surface layer, a blend of 60% by weight of LBKP (CSF was 550 ml), 30% by weight of coated waste paper, and 10% by weight of waste art paper was used. A white liner was made in the same manner as in Example 1 except that it was not.
［比較例５］蛍光消去剤は添加せず、表層用のパルプスラリーとして、ＬＢＫＰ（ＣＳＦは５５０ｍｌ）９０重量％と、アート古紙１０重量％とを配合したものを用いたこと以外は、実施例１と同様の操作により白ライナーを抄造した。 [Comparative Example 5] Example, except that no fluorescent quenching agent was added, and as a pulp slurry for the surface layer, 90% by weight of LBKP (CSF was 550 ml) and 10% by weight of used art paper were used. A white liner was made in the same manner as in No. 1.
［比較例６］蛍光消去剤を添加しなかったこと以外は、実施例３と同様の操作により白ライナーを抄造した。 [Comparative Example 6] A white liner was made in the same manner as in Example 3 except that no fluorescent quencher was added.
これらの全実施例及び比較例について、地合、演色性、及び演色性のばらつきについて評価した結果は、表１に示すとおりであった。 Table 1 shows the results of evaluating the formation, color rendering properties, and variations in color rendering properties for all of these Examples and Comparative Examples.
なお、表１中の「蛍光強度２４点平均」とは、３０分毎に２４回サンプリングした蛍光強度（マクベス社製カラーアナライザーにより測定したＵＶ−ＩＮ−ＢＲＴとＵＶ−ＯＵＴ−ＢＲＴとの差）の平均値（％）であり、また、「２４点のばらつき」とは、蛍光強度２４点の標準偏差である。 Incidentally, the "fluorescence intensity 24-point average" in Table 1, (the difference between the UV-IN-BRT and UV-OUT-BRT measured by Macbeth Co. color analyzer) 24 times sampled fluorescence intensity every 30 minutes In addition, the “24-point variation” is a standard deviation of the fluorescence intensity of 24 points.
「地合」とは、抄造した白ライナーの地合を目視評価したもので、その評価基準は◎印の「大変良好である」、○印の「良好である」、△印の「悪い」、×印の「非常に悪い」の４段階とした。 The “form” is a visual evaluation of the texture of the white liner produced, and the evaluation criteria are “very good” with ◎, “good” with ○, and “bad” with △. , And four stages of “very bad” marked with x.
「演色性」とは、演色の問題の発生の有無を目視評価したものであり、その評価基準は◎印の「演色の問題が殆ど発生しない」、○印の「演色の問題が多少発生するが、実用上問題ない」、△印の「演色の問題が発生する」、×印の「演色の問題が多く発生する」の４段階とした。 “Color rendering” is a visual evaluation of the occurrence of color rendering problems. The evaluation criteria are “almost no color rendering problems” with ◎, and “color rendering problems occur slightly with ○”. However, there are no practical problems ”,“ △ color rendering problems occur ”marked by Δ, and“ color rendering problems occur frequently ”marked by ×.
さらにまた、「演色性のばらつき」とは、抄造した白ライナーが色調を目視評価したものであり、その評価基準は◎印の「ばらつきが発生せず、白ライナーが非常に安定した色調を有する」、○印の「ばらつきが多少発生するが、白ライナーが安定した色調を有する」、△印の「ばらつきが発生し、白ライナーの色調に多少のばらつきが発生する」、×印の「ばらつきが多く発生し、白ライナーの色調にばらつきが目立つ」の４段階とした。
Furthermore, the “color rendering variation” is a visual evaluation of the color tone of the white liner made, and the evaluation standard is “A variation does not occur, and the white liner has a very stable color tone. ”, ○ mark“ Slight variation occurs, but white liner has a stable color tone ”, △ mark“ Variation occurs, some variation occurs in color tone of white liner ”,“ X ”variation The number of occurrences was large, and variations in the color tone of the white liner were conspicuous.
Claims (2)
前記白ライナーの表層用のパルプスラリーとして、コート古紙やアート古紙を原料とした古紙パルプが５０重量％以上配合され、前記白ライナーの表層の灰分を１５重量％以上含有させ、前記表層用のパルプスラリーが滞留時間を有する紙料調成工程で、前記表層用のパルプスラリーに蛍光消去剤が連続添加されており、該蛍光消去剤の添加量が、前記抄紙工程を経た後の前記白ライナーの表層面のマクベス社製カラーアナライザーにより測定したＵＶ−ＩＮ−ＢＲＴとＵＶ−ＯＵＴ−ＢＲＴとの差である蛍光強度の測定結果に基づいて、前記蛍光強度が１０％以下となるように随時調整されていることを特徴とする白ライナーの製造方法。 In the method for producing a white liner that is made so as to have a paper layer of a single layer or a plurality of layers through at least a paper stock preparation step and a paper making step,
As the pulp slurry for the surface layer of the white liner, 50% by weight or more of waste paper pulp made from coated waste paper or art waste paper is blended, and 15% by weight or more of the ash content of the surface layer of the white liner is contained. In the stock preparation process in which the slurry has a residence time, a fluorescent erasing agent is continuously added to the pulp slurry for the surface layer, and the amount of the fluorescent erasing agent added is that of the white liner after the paper making process. Based on the measurement result of the fluorescence intensity, which is the difference between UV-IN-BRT and UV-OUT-BRT, measured with a Macbeth color analyzer on the surface, it is adjusted as needed so that the fluorescence intensity is 10% or less. A method for producing a white liner.
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