JP2011122271A - Paper transparentizing agent - Google Patents
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本発明は、紙を透明化させる紙透明化剤に関する。 The present invention relates to a paper clearing agent that makes paper transparent.
例えば、封筒や薬袋の一部分には、内部にある宛先情報や薬を外部から見ることができるように、透明窓が設けられている。この透明窓は、従来、封筒や薬袋の一部分を切り欠くように取り除いた開口部に透明フィルムを貼り付けることにより作製されていた。しかしながら、このような透明窓は、紙の一部分を打ち抜いて上記開口部を形成した後に、上記透明フィルムを糊付けして作製されることから、非常に手間がかかってしまい、生産性が悪くなってしまっていた。 For example, a part of the envelope or medicine bag is provided with a transparent window so that the destination information and medicine inside can be seen from the outside. Conventionally, this transparent window has been produced by attaching a transparent film to an opening that is removed so as to cut out a part of an envelope or a medicine bag. However, since such a transparent window is manufactured by punching a part of paper and forming the opening, and then gluing the transparent film, it is very time-consuming and productivity is deteriorated. I was sorry.
このため、例えば、下記特許文献１等においては、紙を構成しているセルロース繊維と略同等の光屈折率を有する紙透明化剤（透明印刷インキ（ワニス）に溶剤を１０〜５０重量％を混入したもの）を当該紙に印刷（塗布）して、当該繊維同士の間の微細な空隙内に当該紙透明化剤を入り込ませて、当該紙透明化剤（透明印刷インキ（ワニス））で上記空隙を埋め込み、当該繊維と当該空隙との光屈折率差をほとんどなくして、当該繊維と当該空隙との界面で光屈折率差による乱反射を生じさせることなく略等しい屈折率で光を進行させる、すなわち、透明化させることにより、打ち抜き作業やフィルムの貼り付け作業を行うことなく、当該紙透明化剤の印刷（塗布）部分に透明窓を形成することを提案している。 For this reason, for example, in the following Patent Document 1 and the like, a paper clearing agent (transparent printing ink (varnish) having a light refractive index substantially equal to that of cellulose fibers constituting paper is added with 10 to 50% by weight of a solvent. (Mixed) is printed (applied) on the paper, and the paper clearing agent is put into the fine gaps between the fibers, and the paper clearing agent (transparent printing ink (varnish)) is used. The gap is embedded, the difference in optical refractive index between the fiber and the gap is almost eliminated, and light is allowed to travel at substantially the same refractive index without causing irregular reflection due to the optical refractive index difference at the interface between the fiber and the gap. In other words, it has been proposed to form a transparent window in a printing (application) portion of the paper clearing agent without making a punching operation or a film attaching operation by making it transparent.
しかしながら、前述した特許文献１等に記載されているような従来の紙透明化剤においては、光屈折率をほとんどなくすように紙の厚さ方向で前記空隙内を透明印刷インキ（ワニス）で埋め込むのに表裏それぞれ複数回の印刷（塗布）を行わなければならなかったため、非常に手間がかかってしまい、作業効率の低下を招いてしまっていた。 However, in the conventional paper clearing agent as described in Patent Document 1 described above, the inside of the gap is embedded with a transparent printing ink (varnish) in the thickness direction of the paper so as to almost eliminate the optical refractive index. However, since the printing (coating) had to be performed a plurality of times for each of the front and back sides, it was very time-consuming and caused a reduction in work efficiency.
このようなことから、本発明は、紙の透明化処理を効率よく実施することができる紙透明化剤を提供することを目的とする。 In view of the above, an object of the present invention is to provide a paper clearing agent that can efficiently carry out a paper clearing treatment.
前述した課題を解決するための、本発明に係る紙透明化剤は、紙を透明化する紙透明化剤であって、脂環族飽和炭化水素系樹脂と、炭化水素系溶剤及び脂肪酸エステル系溶剤の少なくとも一方の溶剤とを混合したものからなることを特徴とする。 The paper clearing agent according to the present invention for solving the above-mentioned problems is a paper clearing agent that makes paper clear, and is an alicyclic saturated hydrocarbon resin, a hydrocarbon solvent, and a fatty acid ester type. It consists of what mixed at least one solvent of the solvent.
また、本発明に係る紙透明化剤は、上述した紙透明化剤において、前記脂環族飽和炭化水素系樹脂が４０〜８０重量％、前記溶剤が２０〜６０重量％の割合で混合されたものであることを特徴とする。 Moreover, the paper clearing agent according to the present invention is the paper clearing agent described above, wherein the alicyclic saturated hydrocarbon resin is mixed in a proportion of 40 to 80% by weight and the solvent is mixed in a proportion of 20 to 60% by weight. It is characterized by being.
また、本発明に係る紙透明化剤は、上述した紙透明化剤において、前記脂環族飽和炭化水素系樹脂が、４０℃以上の融点を有するものであることを特徴とする。 The paper clearing agent according to the present invention is characterized in that, in the paper clearing agent described above, the alicyclic saturated hydrocarbon resin has a melting point of 40 ° C. or higher.
また、本発明に係る紙透明化剤は、上述した紙透明化剤において、前記脂環族飽和炭化水素系樹脂が、水素化石油樹脂、水素化ロジンエステル樹脂、水素化テルペン樹脂のうちの少なくとも一種であることを特徴とする。 Further, the paper clearing agent according to the present invention is the above-described paper clearing agent, wherein the alicyclic saturated hydrocarbon resin is at least one of a hydrogenated petroleum resin, a hydrogenated rosin ester resin, and a hydrogenated terpene resin. It is a type.
また、本発明に係る紙透明化剤は、上述した紙透明化剤において、前記炭化水素系溶剤が、炭素数８〜１８のものからなることを特徴とする。 Moreover, the paper clearing agent according to the present invention is characterized in that, in the paper clearing agent described above, the hydrocarbon solvent is composed of one having 8 to 18 carbon atoms.
また、本発明に係る紙透明化剤は、上述した紙透明化剤において、前記炭化水素系溶剤が、オレフィン系溶剤、パラフィン系溶剤、ナフテン系溶剤のうちの少なくとも一種からなることを特徴とする。 The paper clearing agent according to the present invention is the paper clearing agent described above, wherein the hydrocarbon solvent is at least one of an olefin solvent, a paraffin solvent, and a naphthenic solvent. .
また、本発明に係る紙透明化剤は、上述した紙透明化剤において、前記脂肪酸エステル系溶剤が、下記の化学式（１）で表される化合物であることを特徴とする。
Ｒ1ＣＯＯＲ2 （１）
ただし、Ｒ1は炭素数９〜２３のアルキル基又はアルケニル基、Ｒ2は炭素数３〜８のアルキル基である。
The paper clearing agent according to the present invention is characterized in that, in the paper clearing agent described above, the fatty acid ester solvent is a compound represented by the following chemical formula (1).
R 1 COOR 2 (1)
However, R 1 is an alkyl or alkenyl group having 9 to 23 carbon atoms, R 2 is an alkyl group having 3 to 8 carbon atoms.
また、本発明に係る紙透明化剤は、上述した紙透明化剤において、前記溶剤が、沸点２００℃未満の低沸点溶剤に対して、沸点２００℃以上の高沸点溶剤を２０〜８０体積％の割合で混合したものであり、当該高沸点溶剤と当該低沸点溶剤との沸点差が２０℃以上であることを特徴とする。 Further, the paper clearing agent according to the present invention is the above-described paper clearing agent, wherein the solvent is 20 to 80% by volume of a high boiling point solvent having a boiling point of 200 ° C. or more with respect to a low boiling point solvent having a boiling point of less than 200 ° C. The difference in boiling point between the high-boiling solvent and the low-boiling solvent is 20 ° C. or more.
本発明に係る紙透明化剤によれば、脂環族飽和炭化水素系樹脂に対して溶剤が非常に高い相溶性を有していることから、高い溶解度で当該樹脂を溶解しながらも、高い浸透性（低粘度）を維持することができるので、紙の厚さ方向で比較的深くにまでわたって当該樹脂を効率よく入り込ませることができる。このため、紙の表裏に対してそれぞれ１回ずつ供給するだけで、紙の厚さ方向全体にわたって供給することができるので、作業にかかる手間を大幅に削減することができ、作業効率を向上させることができる。その結果、紙の透明化処理を効率よく実施することができる。 According to the paper clearing agent according to the present invention, since the solvent has a very high compatibility with the alicyclic saturated hydrocarbon-based resin, it is high while dissolving the resin with high solubility. Since the permeability (low viscosity) can be maintained, the resin can be efficiently introduced over a relatively deep depth in the paper thickness direction. For this reason, since it can be supplied over the entire thickness direction of the paper by supplying it once for each of the front and back sides of the paper, the labor required for the work can be greatly reduced and the work efficiency can be improved. be able to. As a result, it is possible to efficiently carry out the paper transparency treatment.
本発明に係る紙透明化剤を以下に具体的に説明する。 The paper clearing agent according to the present invention will be specifically described below.
本発明に係る紙透明化剤は、紙を透明化する紙透明化剤であって、脂環族飽和炭化水素系樹脂と、炭化水素系溶剤及び脂肪酸エステル系溶剤の少なくとも一方の溶剤とを混合したものからなる。 The paper clearing agent according to the present invention is a paper clearing agent that makes paper clear, and is a mixture of an alicyclic saturated hydrocarbon resin and at least one of a hydrocarbon solvent and a fatty acid ester solvent. Made up of.
前記脂環族飽和炭化水素系樹脂は、紙を構成するセルロース繊維と略同等の光屈折率を有し、当該セルロース繊維同士の間の微細な空隙内に介在して当該空隙を埋め込むことにより、当該繊維と当該空隙との光屈折率差をほとんどなくして、当該繊維と当該空隙との界面で光屈折率差による乱反射（白色化／不透明）を生じさせることなく略等しい屈折率で光を進行させる、すなわち、紙を透明化させることができるものであり、例えば、水素化石油樹脂、水素化ロジンエステル樹脂、水素化テルペン樹脂等を挙げることができる。 The alicyclic saturated hydrocarbon resin has a light refractive index substantially equal to that of cellulose fibers constituting paper, and is embedded in the fine gaps between the cellulose fibers, The optical refractive index difference between the fiber and the air gap is almost eliminated, and light is propagated with substantially the same refractive index without causing irregular reflection (whitening / opacity) due to the optical refractive index difference at the interface between the fiber and the air gap. That is, the paper can be made transparent, and examples thereof include hydrogenated petroleum resins, hydrogenated rosin ester resins, and hydrogenated terpene resins.
前記水素化石油樹脂としては、例えば、米国エクソンモービル社製「エスコレッツ ５３８０（商品名）」，「エスコレッツ ５６９０（商品名）」等を挙げることができ、前記水素化ロジンエステル樹脂としては、例えば、荒川化学工業株式会社製「パインクリスタル ＫＥ−１００（商品名）」等を挙げることができ、前記水素化テルペン樹脂としては、例えば、ヤスハラケミカル株式会社製「クリアロン Ｐ−８５（商品名）」等を挙げることができる。 Examples of the hydrogenated petroleum resin include “Escollets 5380 (trade name)” and “Escollets 5690 (trade name)” manufactured by ExxonMobil Corporation of the United States. Examples of the hydrogenated rosin ester resin include: Examples include “Pine Crystal KE-100 (trade name)” manufactured by Arakawa Chemical Industries, Ltd., and examples of the hydrogenated terpene resin include “Clearon P-85 (trade name)” manufactured by Yashara Chemical Co., Ltd. Can be mentioned.
なお、前記脂環族飽和炭化水素系樹脂は、融点が４０℃以上であると好ましく、特に、融点が６０℃以上であるとより好ましい。なぜなら、融点が４０℃未満であると、紙の前記セルロース繊維同士の間の前記空隙内に介在させて当該紙を多数積み重ねたときに、温度条件等によっては、当該紙同士が接着してブロッキングを生じてしまうおそれがあるからである。 The alicyclic saturated hydrocarbon resin preferably has a melting point of 40 ° C. or higher, and more preferably has a melting point of 60 ° C. or higher. Because, when the melting point is less than 40 ° C., when the papers are stacked in a large number by interposing them in the gaps between the cellulose fibers of the papers, the papers adhere and block depending on the temperature conditions and the like. This is because there is a risk of causing the problem.
前記炭化水素系溶剤は、前記脂環族飽和炭化水素系樹脂と相溶して当該脂環族飽和炭化水素系樹脂の粘度を低下させることにより、前記紙を構成するセルロース繊維同士の間の微細な空隙内に当該脂環族飽和炭化水素系樹脂を浸透させるものであり、例えば、オレフィン系溶剤、パラフィン系溶剤、ナフテン系溶剤等を挙げることができる。 The hydrocarbon solvent is compatible with the alicyclic saturated hydrocarbon resin to reduce the viscosity of the alicyclic saturated hydrocarbon resin, thereby reducing the fineness between the cellulose fibers constituting the paper. The alicyclic saturated hydrocarbon resin is allowed to permeate into such voids, and examples thereof include olefin solvents, paraffin solvents, and naphthene solvents.
前記オレフィン系溶剤としては、例えば、出光興産株式会社製「リニアレン １０（商品名）」，「リニアレン １２（商品名）」等のα−オレフィン系溶剤等を挙げることができ、パラフィン系溶剤としては、例えば、出光興産株式会社製「ＩＰクリーン ＬＸ（商品名）」等のイソパラフィン系溶剤等を挙げることができ、ナフテン系溶剤としては、例えば、新日本石油株式会社製「ナフテゾール １６０（商品名）」等を挙げることができる。 Examples of the olefin solvent include α-olefin solvents such as “Linearene 10 (trade name)” and “Linearene 12 (trade name)” manufactured by Idemitsu Kosan Co., Ltd. Examples thereof include isoparaffinic solvents such as “IP Clean LX (trade name)” manufactured by Idemitsu Kosan Co., Ltd., and examples of naphthenic solvents include “Naphthezol 160 (trade name)” manufactured by Nippon Oil Corporation. Or the like.
なお、前記炭化水素系溶剤は、炭素数８〜１８であると好ましく、特に、炭素数１０〜１２であるとより好ましい。なぜなら、炭素数が８未満であると、沸点が低いことから、使用温度条件等によっては、使用中に揮発して紙透明化剤の粘度を変化させてしまう可能性があり、炭素数が１８を超えると、粘度が高いことから、使用温度条件等によっては、前記樹脂を溶解したときの粘度が高くなり過ぎて浸透性を損なってしまう可能性があるからである。 The hydrocarbon solvent preferably has 8 to 18 carbon atoms, and more preferably 10 to 12 carbon atoms. This is because if the number of carbon atoms is less than 8, the boiling point is low, and depending on the operating temperature conditions, etc., there is a possibility of volatilizing during use and changing the viscosity of the paper clearing agent. This is because the viscosity is so high that the viscosity when the resin is dissolved becomes too high and the permeability may be impaired depending on the operating temperature condition and the like.
前記脂肪酸エステル系溶剤は、前記炭化水素系溶剤と同様に、前記脂環族飽和炭化水素系樹脂と相溶して当該脂環族飽和炭化水素系樹脂の粘度を低下させることにより、前記紙を構成するセルロース繊維同士の間の微細な空隙内に当該脂環族飽和炭化水素系樹脂を浸透させるものであり、例えば、下記の化学式（１）で表される化合物等を挙げることができる。 Like the hydrocarbon solvent, the fatty acid ester solvent is compatible with the alicyclic saturated hydrocarbon resin to reduce the viscosity of the alicyclic saturated hydrocarbon resin. The alicyclic saturated hydrocarbon resin is infiltrated into fine voids between the cellulose fibers constituting, and examples thereof include compounds represented by the following chemical formula (1).
Ｒ1ＣＯＯＲ2 （１）
ただし、Ｒ1は炭素数９〜２３のアルキル基又はアルケニル基、Ｒ2は炭素数３〜８のアルキル基である。
R 1 COOR 2 (1)
However, R 1 is an alkyl or alkenyl group having 9 to 23 carbon atoms, R 2 is an alkyl group having 3 to 8 carbon atoms.
ここで、前記溶剤が、沸点２００℃未満（特に好ましくは１５０〜１８０℃）の低沸点溶剤に対して、沸点２００℃以上（特に好ましくは２００〜２２０℃）の高沸点溶剤を２０〜８０体積％（特に好ましくは４０〜６０体積％）の割合で混合したものであり、当該高沸点溶剤と当該低沸点溶剤との沸点差が２０℃以上であると、紙に供給するローラや刷毛やブラシ等の供給手段上で揮発して前記樹脂を乾燥させてしまうこと（乾固）の抑制と、紙に供給したときに前記樹脂を面方向に過剰に浸透させてしまうこと（滲み）の抑制とを非常にバランスよく保つことができるようになるので好ましい。 Here, the solvent is 20 to 80 volumes of a high boiling point solvent having a boiling point of 200 ° C. or higher (particularly preferably 200 to 220 ° C.) with respect to a low boiling point solvent having a boiling point of less than 200 ° C. (particularly preferably 150 to 180 ° C.). % (Particularly preferably 40 to 60% by volume), and when the difference in boiling point between the high-boiling solvent and the low-boiling solvent is 20 ° C. or more, a roller, a brush, or a brush supplied to the paper And suppressing the evaporation (drying) of the resin by volatilization on the supply means, and the suppression of excessive penetration of the resin in the surface direction (bleeding) when supplied to paper. Is preferable because it can be kept in a very balanced state.
このような上記脂環族飽和炭化水素系樹脂と上記溶剤とを混合してなる上記紙透明化剤は、当該樹脂が４０〜８０重量％、当該溶剤が２０〜６０重量％の割合であると好ましく、特に、当該樹脂が６０〜７０重量％、当該溶剤が３０〜４０重量％の割合であるとより好ましい。なぜなら、上記樹脂が４０重量％未満で上記溶剤が６０重量％超であると、単位容量当たりの上記樹脂量が少なくなり過ぎて、経時によって透明度が低下してしまう可能性があり、上記樹脂が８０重量％超で上記溶剤が２０重量％未満であると、使用温度条件等によっては、粘度が高くなり過ぎて、浸透性が低下してしまう可能性があるからである。 The paper clarifier formed by mixing the alicyclic saturated hydrocarbon resin and the solvent has a ratio of 40 to 80% by weight of the resin and 20 to 60% by weight of the solvent. In particular, the resin is more preferably 60 to 70% by weight and the solvent is 30 to 40% by weight. This is because if the resin is less than 40% by weight and the solvent is more than 60% by weight, the amount of the resin per unit volume becomes too small, and the transparency may decrease with time. This is because if it exceeds 80% by weight and the amount of the solvent is less than 20% by weight, the viscosity may become too high depending on the operating temperature conditions and the like, and the permeability may be lowered.
このような本発明に係る紙透明化剤においては、紙に供給すると、前記セルロース繊維同士の間の微細な空隙内に入り込んで、前記溶剤が揮発してなくなる一方、前記脂環族飽和炭化水素系樹脂が当該空隙を埋め込み、当該繊維と当該空隙との光屈折率差をほとんどなくすことにより、当該繊維と当該空隙との界面で光屈折率差による乱反射を生じさせることなく略等しい屈折率で光を進行させる、すなわち、紙を透明化することができる。 In such a paper clearing agent according to the present invention, when supplied to paper, it enters into the fine voids between the cellulose fibers and the solvent is not volatilized, while the alicyclic saturated hydrocarbon The system resin embeds the gap and eliminates the difference in the optical refractive index between the fiber and the gap, so that the interface between the fiber and the gap has a substantially equal refractive index without causing irregular reflection due to the optical refractive index difference. The light can travel, i.e. the paper can be made transparent.
このとき、前記脂環族飽和炭化水素系樹脂に対して前記溶剤が非常に高い相溶性を有していることから、高い溶解度で当該樹脂を溶解しながらも、高い浸透性（低粘度）を維持することができるので、紙の厚さ方向で比較的深くにまでわたって、前記空隙内に当該樹脂を効率よく入り込ませて当該空隙内を当該樹脂で埋め込むことができる。 At this time, since the solvent has very high compatibility with the alicyclic saturated hydrocarbon resin, it has high permeability (low viscosity) while dissolving the resin with high solubility. Since it can be maintained, the resin can be efficiently inserted into the gap and can be embedded with the resin over a relatively deep depth in the thickness direction of the paper.
このため、本発明に係る紙透明化剤では、紙の表裏両面に対してそれぞれ１回ずつ供給するだけで、紙の厚さ方向全体にわたって供給することができるので、作業にかかる手間を大幅に削減することができ、作業効率を向上させることができる。 For this reason, the paper clearing agent according to the present invention can be supplied over the entire thickness direction of the paper only by supplying it once to both the front and back sides of the paper, greatly reducing the labor involved in the work. This can be reduced and work efficiency can be improved.
したがって、本発明に係る紙透明化剤によれば、紙の透明化処理を効率よく実施することができる。 Therefore, according to the paper clearing agent according to the present invention, the paper clearing treatment can be efficiently performed.
また、前記脂環族飽和炭化水素系樹脂が二重結合等を有していないことから、時間が経っても、透明印刷インキ（ワニス）のように発色（黄変化）してしまうことがないので、紙の透明度を長期にわたって維持することができる。 In addition, since the alicyclic saturated hydrocarbon resin does not have a double bond or the like, it does not develop color (change in yellow color) like a transparent printing ink (varnish) over time. Therefore, the transparency of the paper can be maintained for a long time.
また、前記脂環族飽和炭化水素系樹脂が４０℃以上の融点を有していることから、透明化処理した紙を多数積み重ねても、当該紙同士が接着してブロッキングを起こしてしまうことを防止することができる。 In addition, since the alicyclic saturated hydrocarbon resin has a melting point of 40 ° C. or higher, even if a large number of papers that have been subjected to a transparent treatment are stacked, the papers adhere to each other and cause blocking. Can be prevented.
また、炭素数８〜１８（特には１０〜１２）の炭化水素系溶剤を用いると、紙に供給してから適切な時間で揮発させることができるので、紙中で厚さ方向だけでなく面方向にまで前記脂環族飽和炭化水素系樹脂が過剰に浸透してしまうことを大幅に抑制することができ、透明窓の周辺に「滲み」を生じて美観が低下してしまうことを防止することができる。 Further, when a hydrocarbon solvent having 8 to 18 carbon atoms (especially 10 to 12 carbon atoms) is used, it can be volatilized in an appropriate time after being supplied to paper, so that not only the thickness direction in the paper but also the surface. The alicyclic saturated hydrocarbon-based resin can be significantly prevented from penetrating in the direction, preventing the appearance from being deteriorated by causing “bleeding” around the transparent window. be able to.
なお、本発明に係る紙透明化剤においては、紙に対する適性や浸透性等のさらなる向上を図るように、消泡剤や表面調整剤等のような各種の添加剤を必要に応じて適宜併用することも可能である。 In addition, in the paper clearing agent according to the present invention, various additives such as an antifoaming agent and a surface conditioner are appropriately used as necessary so as to further improve the suitability and permeability to paper. It is also possible to do.
また、本発明に係る紙透明化剤は、印刷機を使用することによって、紙に印刷（供給）することが特に好適である。印刷機を使用して本発明に係る紙透明化剤を紙に印刷（供給）する場合、紙に対する当該紙透明化剤の単位面積あたりの一度の印刷（供給）量に限界があるものの、本発明に係る紙透明化剤は、先に説明したように、紙の表裏両面に対してそれぞれ１回ずつ印刷（供給）、又は、紙の一方面に対して２回の重ね刷り（供給）するだけで、紙の厚さ方向全体にわたって浸透させることができ、実用的に十分な程度の透明度を有する透明窓を得ることができる。 The paper clearing agent according to the present invention is particularly preferably printed (supplied) on paper by using a printing machine. When printing (supplying) the paper clearing agent according to the present invention on paper using a printing machine, although there is a limit to the amount of printing (supplying) per unit area of the paper clearing agent on the paper, this book As described above, the paper clearing agent according to the invention is printed (supplied) once on both sides of the paper, or overprinted (supplied) twice on one side of the paper. As a result, it is possible to penetrate the entire thickness direction of the paper and to obtain a transparent window having a practically sufficient degree of transparency.
本発明に係る紙透明化剤の効果を確認するために以下のような確認試験を行った。 In order to confirm the effect of the paper clearing agent according to the present invention, the following confirmation test was performed.
［試験体の作製］
下記の表１に示す樹脂及び溶剤を下記の表２に示す割合で容器に配合し、ディゾルバで攪拌しながら加熱（１２０℃）して当該樹脂を当該溶剤に溶解することにより、試験体１〜８を作製した。なお、比較のため、一般的な油性の透明印刷インキ（オーバプリントニス（ワニス））６４重量％と一般的なインキソルベント（沸点２５９℃，粘度３．８１ｍｍ2／ｓ（４０℃））３６重量％とを配合してディゾルバで攪拌（室温）することにより、比較体を作製した。
[Preparation of specimen]
By blending the resin and solvent shown in Table 1 below in a container at the ratio shown in Table 2 below, heating (120 ° C.) while stirring with a dissolver to dissolve the resin in the solvent, the test specimens 1 to 1 8 was produced. For comparison, a general oil-based transparent printing ink (overprint varnish (varnish)) 64% by weight and a general ink solvent (boiling point 259 ° C., viscosity 3.81 mm 2 / s (40 ° C.)) 36% % Was mixed and stirred with a dissolver (room temperature) to prepare a comparative body.
［試験内容］
〈物性試験〉
上記試験体１〜８及び上記比較体に対して、Ｅ型粘度計（２５℃）による粘度測定を行うと共に、ザーンカップＮｏ．４（４０℃）による時間測定でも粘度を確認した。
[contents of the test]
<Physical property test>
While performing the viscosity measurement by the E-type viscosity meter (25 degreeC) with respect to the said test bodies 1-8 and the said comparison body, Zaan cup No. The viscosity was also confirmed by time measurement at 4 (40 ° C.).
〈乾燥試験〉
上記試験体１〜８及び上記比較体をガラス板の表面に膜状（７５μｍ厚）に設け、室温下で要する乾燥時間を、膜の表面を指で触った触覚により確認した。
<Drying test>
The said test bodies 1-8 and the said comparative body were provided in the film form (75 micrometers thickness) on the surface of the glass plate, and the drying time required under room temperature was confirmed by the tactile sense which touched the surface of the film | membrane with the finger.
〈使用試験〉
上記試験体１〜８及び上記比較体を紀州製紙株式会社製片艶晒クラフト紙「紀州ラップ（商品名）」（６５ｋｇ／四六全）の両面に塗布供給（９〜１０ｇ／ｍ2）して放置（室温×１時間）した後、下記の項目（１）〜（５）について確認した。
<Use test>
The above test specimens 1 to 8 and the above comparative specimen were coated and supplied (9 to 10 g / m 2 ) on both sides of Kishu Paper Co., Ltd., Kashira Bleached Kraft Paper “Kisshu Wrap (trade name)” (65 kg / 46 all). Then, the following items (1) to (5) were confirmed.
（１）ベタ付き
紙の表面を指で触って触覚によりベタ付き具合を確認した。
(1) Stickiness The surface of the paper was touched with a finger and the stickiness was confirmed by touch.
（２）透明度
米国Laser Labs, Inc.社製「TINT METER INSPECTOR M200（商品名）」を使用して透明度を測定した。
(2) Transparency Transparency was measured using “TINT METER INSPECTOR M200 (trade name)” manufactured by Laser Labs, Inc., USA.
（３）臭気
試験片（３ｃｍ四方）を蓋付き密封容器（２００ミリリットル）の内部に入れて（１０枚）、蓋をして加温放置（４０℃×１時間）した後、室温まで冷却して蓋を外し、容器の内部の臭気を嗅覚により確認した。
(3) Odor Put a test piece (3cm square) into a sealed container (200ml) with lid (10 sheets), cover and leave it warm (40 ° C x 1 hour), then cool to room temperature. The lid was removed and the odor inside the container was confirmed by smell.
（４）滲み
１週間放置して、塗布部分から未塗布部分への滲み部分の長さを測定した。
(4) Bleeding After standing for 1 week, the length of the bleeding portion from the coated portion to the uncoated portion was measured.
（５）変色
太陽光に暴露するように屋外に１ヶ月放置した後、暗所に１ヶ月間保管したものを基準にして、変色（黄変）具合を目視確認した。
(5) Discoloration After being left outdoors for one month so as to be exposed to sunlight, the condition of discoloration (yellowing) was visually confirmed on the basis of what was stored for one month in a dark place.
［試験結果］
上記物性試験及び上記乾燥試験並びに上記使用試験の上記項目（１）〜（５）についての試験結果を下記の表３に示す。
[Test results]
Table 3 below shows the test results for the items (1) to (5) of the physical property test, the drying test, and the use test.
表３からわかるように、ベタ付き試験においては、上記試験体２（水素化ロジンエステル樹脂を使用）が、ベタ付きをやや生じてしまったものの、積み重ねたときにブロッキングを生じてしまうほどではなかった。よって、本発明に係る紙透明化剤は、ブロッキングの発生を防止できることが確認された。 As can be seen from Table 3, in the solid test, although the above test body 2 (using hydrogenated rosin ester resin) slightly sticks, it does not cause blocking when stacked. It was. Therefore, it was confirmed that the paper clearing agent according to the present invention can prevent the occurrence of blocking.
また、透明度試験においては、比較体が約５０％程度であったのに対し、すべての試験体１〜８が約６０％となり、特に、上記試験体４（沸点２８８℃の溶剤使用）が７０％となった。よって、本発明に係る紙透明化剤は、紙の透明化処理を効率よく実施できることが確認された。 Further, in the transparency test, the comparative body was about 50%, whereas all the specimens 1 to 8 were about 60%, and in particular, the above-mentioned specimen 4 (use of a solvent having a boiling point of 288 ° C.) was 70. %. Therefore, it was confirmed that the paper clearing agent according to the present invention can efficiently perform the paper clearing treatment.
また、臭気試験においては、すべての試験体１〜８が臭気をやや有したものの、それほど気になるものではなかった。よって、本発明に係る紙透明化剤は、作業環境の低下を大きく抑制できることが確認された。 Moreover, in the odor test, although all the test bodies 1-8 had a little odor, it was not so worrisome. Therefore, it was confirmed that the paper clearing agent according to the present invention can largely suppress the deterioration of the working environment.
また、滲み試験においては、比較体が１０ｍｍ以上となってしまうのに対し、試験体４（沸点２８８℃の溶剤使用）が５ｍｍ超程度となったものの、試験体１〜３，５〜８が５ｍｍ未満となり、すべての試験体１〜８が実用上問題を生じない程度であった。よって、本発明に係る紙透明化剤は、美観の低下を防止できることが確認された。 Further, in the bleed test, the test body 4 (use of a solvent having a boiling point of 288 ° C.) was about 5 mm, whereas the test bodies 1 to 3 and 5 to 8 were used, whereas the comparative body was 10 mm or more. It became less than 5 mm, and it was a grade which all the test bodies 1-8 do not produce a problem practically. Therefore, it was confirmed that the paper clearing agent according to the present invention can prevent a decrease in aesthetics.
また、変色試験においては、比較体が割と変色（黄変）してしまったのに対し、すべての試験体１〜８が変色（黄変）しなかった。よって、本発明に係る紙透明化剤は、紙の透明度を長期にわたって維持できることが確認された。 Moreover, in the discoloration test, while the comparative body was discolored (yellowing), all of the test bodies 1 to 8 did not discolor (yellowing). Therefore, it was confirmed that the paper clearing agent according to the present invention can maintain the transparency of paper over a long period of time.
本発明に係る紙透明化剤は、紙の透明化処理を効率よく実施することができるので、印刷産業等を始めとする各種産業において、極めて有益に利用することができる。 Since the paper clearing agent according to the present invention can efficiently carry out paper clearing treatment, it can be used extremely beneficially in various industries including the printing industry.
Claims (8)
脂環族飽和炭化水素系樹脂と、炭化水素系溶剤及び脂肪酸エステル系溶剤の少なくとも一方の溶剤とを混合したものからなる
ことを特徴とする紙透明化剤。 A paper clearing agent that makes paper clear,
A paper clearing agent comprising a mixture of an alicyclic saturated hydrocarbon resin and at least one of a hydrocarbon solvent and a fatty acid ester solvent.
前記脂環族飽和炭化水素系樹脂が４０〜８０重量％、前記溶剤が２０〜６０重量％の割合で混合されたものである
ことを特徴とする紙透明化剤。 The paper clearing agent according to claim 1,
The paper clarifier, wherein the alicyclic saturated hydrocarbon resin is mixed in an amount of 40 to 80% by weight and the solvent is mixed in an amount of 20 to 60% by weight.
前記脂環族飽和炭化水素系樹脂が、４０℃以上の融点を有するものである
ことを特徴とする紙透明化剤。 In the paper clearing agent according to claim 1 or 2,
The paper clarifier, wherein the alicyclic saturated hydrocarbon resin has a melting point of 40 ° C or higher.
前記脂環族飽和炭化水素系樹脂が、水素化石油樹脂、水素化ロジンエステル樹脂、水素化テルペン樹脂のうちの少なくとも一種である
ことを特徴とする紙透明化剤。 In the paper clearing agent according to any one of claims 1 to 3,
The paper clarifier, wherein the alicyclic saturated hydrocarbon resin is at least one of a hydrogenated petroleum resin, a hydrogenated rosin ester resin, and a hydrogenated terpene resin.
前記炭化水素系溶剤が、炭素数８〜１８のものからなる
ことを特徴とする紙透明化剤。 In the paper clearing agent according to any one of claims 1 to 4,
The paper clarifier, wherein the hydrocarbon solvent is composed of one having 8 to 18 carbon atoms.
前記炭化水素系溶剤が、オレフィン系溶剤、パラフィン系溶剤、ナフテン系溶剤のうちの少なくとも一種からなる
ことを特徴とする紙透明化剤。 In the paper clearing agent according to any one of claims 1 to 5,
The paper clarifier, wherein the hydrocarbon solvent is at least one of an olefin solvent, a paraffin solvent, and a naphthene solvent.
前記脂肪酸エステル系溶剤が、下記の化学式（１）で表される化合物である
ことを特徴とする紙透明化剤。
Ｒ1ＣＯＯＲ2 （１）
ただし、Ｒ1は炭素数９〜２３のアルキル基又はアルケニル基、Ｒ2は炭素数３〜８のアルキル基である。 In the paper clearing agent according to any one of claims 1 to 6,
The paper clearing agent, wherein the fatty acid ester solvent is a compound represented by the following chemical formula (1).
R 1 COOR 2 (1)
However, R 1 is an alkyl or alkenyl group having 9 to 23 carbon atoms, R 2 is an alkyl group having 3 to 8 carbon atoms.
前記溶剤が、沸点２００℃未満の低沸点溶剤に対して、沸点２００℃以上の高沸点溶剤を２０〜８０体積％の割合で混合したものであり、当該高沸点溶剤と当該低沸点溶剤との沸点差が２０℃以上である
ことを特徴とする紙透明化剤。 In the paper clearing agent according to any one of claims 1 to 7,
The solvent is a mixture of a high-boiling solvent having a boiling point of 200 ° C. or higher and a low-boiling solvent having a boiling point of less than 200 ° C. at a ratio of 20 to 80% by volume. A paper clearing agent having a boiling point difference of 20 ° C. or more.
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| JP2008174696A (en) * | 2007-01-22 | 2008-07-31 | Bridgestone Corp | Rubber composition for tire and pneumatic tire using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS61132698A (en) * | 1984-11-30 | 1986-06-20 | サイデン化学株式会社 | Roduction of transparent paper |
| JPH02127599A (en) * | 1988-11-01 | 1990-05-16 | Daiwa Kagaku Kogyo Kk | Processing of watermark on paper |
| JPH05255529A (en) * | 1992-03-16 | 1993-10-05 | Sekisui Chem Co Ltd | Production of crosslinked polypropylene foam |
| JPH0995639A (en) * | 1995-09-29 | 1997-04-08 | Dainippon Printing Co Ltd | Ink for transparent window and printed matter provided with transparent window using the same |
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| JP2002061094A (en) * | 2000-08-10 | 2002-02-28 | Kazariichi:Kk | Coated fiber material and coating liquid therefor |
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| JP2008174696A (en) * | 2007-01-22 | 2008-07-31 | Bridgestone Corp | Rubber composition for tire and pneumatic tire using the same |
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