JP2006150752A - Water-repellent corrugated cardboard and its production method - Google Patents
Water-repellent corrugated cardboard and its production method Download PDFInfo
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- JP2006150752A JP2006150752A JP2004344639A JP2004344639A JP2006150752A JP 2006150752 A JP2006150752 A JP 2006150752A JP 2004344639 A JP2004344639 A JP 2004344639A JP 2004344639 A JP2004344639 A JP 2004344639A JP 2006150752 A JP2006150752 A JP 2006150752A
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- 239000011111 cardboard Substances 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000005871 repellent Substances 0.000 title description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 62
- 238000000576 coating method Methods 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000005484 gravity Effects 0.000 claims abstract description 18
- 229920003023 plastic Polymers 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 17
- 239000000057 synthetic resin Substances 0.000 claims abstract description 17
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 17
- 230000002265 prevention Effects 0.000 claims abstract description 5
- 239000003973 paint Substances 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000011436 cob Substances 0.000 claims description 6
- 239000000123 paper Substances 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 9
- 230000001070 adhesive effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 abstract 2
- 238000001556 precipitation Methods 0.000 abstract 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 20
- 239000001993 wax Substances 0.000 description 14
- 239000000049 pigment Substances 0.000 description 9
- 239000002244 precipitate Substances 0.000 description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 8
- 229920006243 acrylic copolymer Polymers 0.000 description 7
- 239000012188 paraffin wax Substances 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000011256 inorganic filler Substances 0.000 description 6
- 229910003475 inorganic filler Inorganic materials 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- -1 etc.) Substances 0.000 description 3
- 239000011087 paperboard Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
Images
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- Cartons (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Paper (AREA)
Abstract
Description
本発明は、コルゲーターの貼合工程において、簡易で、液飛び防止装置を有しないロール塗工機を使用して、塗料をライナーのオモテ面側に塗工、乾燥して製造する撥水・遮水段ボール及びその製造方法に関するものである。 The present invention provides a water-repellent / shielding coating produced by applying and drying a coating on the front side of a liner using a roll coating machine that is simple and does not have a liquid splash prevention device in the corrugator bonding process. The present invention relates to a water cardboard and a method for manufacturing the same.
コルゲーター貼合工程にて、ライナーのオモテ面側に撥水剤を塗工乾燥し、撥水段ボールを製造する従来技術として、所謂自家撥水段ボールと称されるものが有る。
自家撥水段ボールは、コルゲーターのライナーミルロールスタンドとシングルフェサー間及びライナーミルロールスタンドとダブルフェサー間に取り付けた、簡易なロール塗工機（図1）で塗工して製造されるものであり、ロール塗工機（図1）は小スペース、簡易作業を命題としており、ライナーの紙幅変更に伴って修正する必要があるロールサイド部分の液飛び防止装置を有しない設計が大部分を占める。
As a conventional technique for producing a water-repellent corrugated cardboard by applying a water-repellent agent to the front side of the liner in the corrugator bonding step and drying it, there is a so-called self-water-repellent corrugated cardboard.
In-house water-repellent corrugated cardboard is manufactured by coating with a simple roll coater (Fig. 1) attached between the corrugator's liner mill roll stand and single fesser and between the liner mill roll stand and double fesser. The roll coater (Fig. 1) has a small space and simple work as its proposition, and most of the designs do not have a liquid splash prevention device at the roll side that needs to be corrected as the paper width of the liner changes.
従来の装置では、塗工液の粘度を１００ｍＰａ・ｓ以上にすると、塗工ロールと塗工ライナーの端部接触部（図２）から塗工液の液飛びが発生して周辺を汚染するため、塗工液の粘度を１００ｍＰａ・ｓ以上にすることができないという問題が有った。 In the conventional apparatus, when the viscosity of the coating liquid is set to 100 mPa · s or more, the coating liquid splatters from the end contact portion (FIG. 2) of the coating roll and the coating liner, thereby contaminating the periphery. There was a problem that the viscosity of the coating liquid could not be increased to 100 mPa · s or more.
このため、その塗工液の粘度は１００ｍＰａ・ｓ以下、好ましくは５０ｍＰａ・ｓ以下にする必要があり、塗工液の配合において、塗工液の粘度が１００ｍＰａ・ｓ以下になると沈降沈殿する填料（ピグメント）は使用できず、塗工液粘度を１００ｍＰａ・ｓ以下にしても沈降沈殿しないワックスと合成樹脂等のエマルジョンから成り立っていた。
従来技術では、填料が沈降すると配管詰まり等の製造トラブルが発生していた。
For this reason, the viscosity of the coating liquid needs to be 100 mPa · s or less, preferably 50 mPa · s or less. In the blending of the coating liquid, the filler that precipitates and precipitates when the viscosity of the coating liquid becomes 100 mPa · s or less. (Pigment) could not be used, and consisted of an emulsion such as a wax and a synthetic resin that did not precipitate even when the viscosity of the coating solution was 100 mPa · s or less.
In the prior art, when the filler settles, manufacturing troubles such as pipe clogging have occurred.
従来技術における塗料の合成樹脂等の性質は、塗料中のワックスがライナー原紙内部へ浸透するのを防止するのに役立ち、ワックスは主に撥水性と遮水性の向上に役立っているものであった。 The properties of the synthetic resin and the like of the paint in the prior art helped prevent the wax in the paint from penetrating into the liner base paper, and the wax mainly helped to improve water repellency and water shielding. .
しかしながら、従来技術においては、塗工液に滑り防止等に効果のある填料を配合していないため、遮水性を大幅に高める目的でライナーへの塗工量を増やしていた。その結果、塗工液中のワックスによる影響で、滑り角度の大幅低下、フレキソ印刷不良、酢酸ビニール接着剤等の合成樹脂接着剤を使用する際の接着不良等の諸問題が発生し、実際上、段ボールの遮水性を大幅に高めることができないという問題が有った。 However, in the prior art, since the filler which is effective in preventing slipping is not blended in the coating liquid, the coating amount on the liner has been increased for the purpose of significantly increasing the water barrier property. As a result, various problems such as drastic reduction in slip angle, flexographic printing failure, adhesion failure when using synthetic resin adhesive such as vinyl acetate adhesive, etc. occurred due to the influence of wax in the coating liquid. There was a problem that the water barrier property of the cardboard could not be significantly increased.
特許文献１の塗工ライナーでは、有機ピグメントを含有し、通常球形をしており、球の中が詰まっているものと中空のものとがあり、いずれも使用可能である、とあるが、特許文献１は網点の欠落が少なく、白紙光沢及び印刷光沢に優れる塗工ライナーに関する公報であり、塗料の粘度範囲により顔料が沈殿することを考慮している公報ではない。
請求項５及び６に記載した、実密粒子構造とは、球の中が詰まっている状態を示し、中空粒子構造とは、球状の内側が空洞であり中空になっている状態を示す。
The coating liner of Patent Document 1 contains an organic pigment and is usually spherical, and there are ones in which the inside of the sphere is clogged and hollow ones, both of which can be used. Document 1 is a publication relating to a coating liner having few blank dots and excellent white paper gloss and printing gloss, and is not a publication taking into account that the pigment precipitates depending on the viscosity range of the paint.
The solid particle structure described in claims 5 and 6 indicates a state in which the inside of a sphere is clogged, and the hollow particle structure indicates a state in which a spherical inside is hollow and hollow.
特許文献２の耐水性段ボールシートでは、顔料はプラスチック填料ではなく、カオリン、炭酸カルシウム、水酸化アルミニウムなどが使われている。 In the water-resistant corrugated cardboard sheet of Patent Document 2, the pigment is not a plastic filler, but kaolin, calcium carbonate, aluminum hydroxide or the like is used.
特許文献３の段ボールシートでは、顔料としてアクリル樹脂、ベンゾグアナミン樹脂、尿素樹脂、澱粉粒子などの微粉末が使用できる、としているが、塗工時に顔料が塗工面に対して平行に配置して積層構造となる平版状（アスペクト比が４以上、さらに好ましくは６以上であるもの）の顔料、としており塗料の粘度範囲により顔料が沈殿することを考慮している公報ではない。 In the corrugated cardboard sheet of Patent Document 3, it is said that fine powders such as acrylic resin, benzoguanamine resin, urea resin, and starch particles can be used as a pigment. It is not a publication that considers that the pigment precipitates depending on the viscosity range of the paint, which is a lithographic pigment (with an aspect ratio of 4 or more, more preferably 6 or more).
特許文献４の段ボールシートでは、顔料として、染料と混合した合成樹脂顔料を用いることができる、としているが、これも塗料の粘度範囲により顔料が沈殿することを考慮している公報ではない。 In the corrugated cardboard sheet of Patent Document 4, a synthetic resin pigment mixed with a dye can be used as a pigment, but this is not a publication considering that the pigment is precipitated depending on the viscosity range of the paint.
本発明は、コルゲーター貼合工程の簡易なロール塗工機（図１）を使用して、ロールからの液飛びと塗料中の填料沈降を防止し、高度の撥水性と遮水性を有する段ボールを製造するものである。 The present invention uses a roll coater (FIG. 1) with a simple corrugator bonding process to prevent liquid splash from the roll and settling of the filler in the paint, and to provide corrugated cardboard having high water repellency and water shielding. To manufacture.
本発明においては、塗工したライナーに高度の撥水性と遮水性を付与しても、滑り角度の低下、フレキソ印刷不良と酢酸ビニール接着不良を防止するため、塗料中にプラスチック填料を配合するものであり、１００ｍＰａ・ｓ以下の粘度にすると沈降沈殿してしまう無機填料は配合しない。 In the present invention, a plastic filler is blended in the paint in order to prevent slip angle reduction, flexographic printing failure and vinyl acetate adhesion failure even if the coated liner is given high water repellency and water shielding properties. An inorganic filler that precipitates and precipitates when the viscosity is 100 mPa · s or less is not blended.
プラスチック填料は、通常使用の無機填料(比重＝２〜５)と異なり、実際上の比重を塗工液の比重とほぼ同一にすることが可能であり、塗料粘度を１００ｍＰａ・ｓ以下にしても沈降沈殿することはない。
無機填料には、カオリン、炭酸カルシウム、酸化チタン等が有るが、これらは全て、比重が２以上であり、コルゲーター貼合工程で塗工する塗料に配合すると沈降沈殿してしまうので配合できない。
無機填料を配合した場合、塗料粘度を３００ｍＰａ・ｓまで高めれば無機填料は沈降しないが、３００ｍＰａ・ｓでは、コルゲーター工程の簡易なロール塗工機（図１）では、塗料の液飛びが発生するため、配合できない。
The plastic filler is different from the normally used inorganic filler (specific gravity = 2-5), the actual specific gravity can be made substantially the same as the specific gravity of the coating liquid, and the viscosity of the paint can be made 100 mPa · s or less. There is no sedimentation.
Inorganic fillers include kaolin, calcium carbonate, titanium oxide, and the like, but these all have a specific gravity of 2 or more and cannot be blended because they will precipitate when they are blended into the coating material applied in the corrugator laminating process.
When an inorganic filler is added, the inorganic filler will not settle if the viscosity of the paint is increased to 300 mPa · s. However, at 300 mPa · s, the liquid coat of the roll coater (FIG. 1) with a simple corrugator process occurs. Therefore, it cannot be blended.
本発明では、プラスチック填料を塗料に配合することにより、塗工ライナーの滑り角度の低下防止、フレキソ印刷不良の改善、合成樹脂接着剤の接着不良改善の効果がある。
このため、本発明は、コルゲーター貼合工程の簡易なロール塗工機使用において、塗工したライナーの遮水性の大幅向上、滑り角度・フレキソ印刷性・合成樹脂接着剤接着性等の低下防止を同時に行なうことのできるものである。
In the present invention, blending a plastic filler with a paint has effects of preventing a decrease in the sliding angle of the coating liner, improving flexographic printing defects, and improving adhesion defects of synthetic resin adhesives.
For this reason, in the present invention, in the use of a simple roll coating machine in the corrugator bonding process, the water shielding property of the coated liner is greatly improved, and the slip angle, flexographic printability, synthetic resin adhesive adhesiveness and the like are prevented from being lowered. It can be done at the same time.
本発明は、ライナーオモテ面への塗工場所と装置は、従来技術の自家撥水段ボールと同様である。
つまり、塗工場所は、コルゲーターのライナーミルロールスタンドとシングルフェサー間及びライナーミルロールスタンドとダブルフェサー間であり、塗工装置は、図１に示すように、小スペース、簡易作業を命題としたロールサイド部分の液飛び防止装置を有しないものである。
In the present invention, the location and apparatus for coating the liner front surface are the same as those of the conventional self-water-repellent cardboard.
In other words, the coating place is between the corrugator liner mill roll stand and the single fecer, and between the liner mill roll stand and the double fecer, and the coating apparatus is a small space and easy work as shown in FIG. It does not have a liquid splash prevention device at the roll side portion.
塗料の主成分は、合成樹脂とワックスのエマルジョンとプラスチック填料の３成分の分散液からなり、その濃度は、作成時は３０〜５０％であるが、塗工時は、２〜６倍に水稀釈し、６〜２５％にて使用し、その濃度でライナーに９〜１７ｇ／ｍ２、好ましくは約１２〜１４ｇ／ｍ２塗工して、本発明の撥水・遮水段ボールを製造するものである。 尚、請求項３に記載した有姿塗工量とは、水を含んだ状態の塗工量を示す。
このため、固形塗工量は、０．１〜５ｇ／ｍ２、好ましくは０．８〜３．２ｇ／ｍ２になる。
The main component of the paint consists of a three-component dispersion of synthetic resin, wax emulsion and plastic filler. The concentration is 30-50% at the time of preparation, but 2-6 times as much water at the time of coating. diluted, and used in 6~25%, 9~17g / m 2 to the liner at that concentration, preferably for about 12~14g / m 2 coated, to produce a water-repellent-water shield cardboard invention Is. In addition, the solid coating amount described in Claim 3 shows the coating amount of the state containing water.
For this reason, the solid coating amount is 0.1 to 5 g / m 2 , preferably 0.8 to 3.2 g / m 2 .
本発明は、塗料にプラスチック填料を配合しているため、固形塗工量を３ｇ／ｍ２程度まで高めても、段ボールとしての滑り角度を１８度以上に維持し、良好なフレキソ印刷性と酢ビ接着性を維持できるものである。
本明細書での滑り角度は、塗料塗工面同士をＪＩＳ Ｐ ８１４７の規定に従って測定した値を意味する。
そして、撥水性を示すコッブ吸水量（ＪＩＳ Ｐ ８１４０の２分値：コッブ吸水度が少ない程遮水性が良い）は、２５ｇ／ｍ２以下とすることが好ましい。なお、参考までに、一般ライナーの２分法コッブ吸水量は３５ｇ／ｍ２程度であり、通常の自家耐水段ボールの２分法コッブ吸水量は２５ｇ／ｍ２程度である。
本発明では、更に、市販耐水ライナーのコッブ吸水量（２０〜２５ｇ／ｍ２）より低くするために２０ｇ／ｍ２以下にすることもできるし、もっと極端に撥水性を高め、コッブ吸水量を５ｇ／ｍ２（接触時間＝２分）以下にすることも可能である。本発明ではプラスチック填料により滑り角度が制御されているので、撥水剤の塗布量は自由に選べることが利点となっている。
In the present invention, since a plastic filler is blended in the paint, even if the solid coating amount is increased to about 3 g / m 2 , the slip angle as a corrugated cardboard is maintained at 18 degrees or more, and good flexographic printability and vinegar The adhesiveness can be maintained.
The slip angle in this specification means a value obtained by measuring paint coating surfaces according to JIS P 8147.
Then, the water absorption amount of the Cobb that shows water repellency (JIS P 8140 bisection value: the smaller the Cobb water absorption is, the better the water shielding property) is preferably 25 g / m 2 or less. For reference, the water absorption of the bisection cob of the general liner is about 35 g / m 2 , and the water absorption of the bisection cob of a normal self-waterproof corrugated cardboard is about 25 g / m 2 .
In the present invention, in order to lower the Cobb water absorption amount (20 to 25 g / m 2 ) of the commercially available water-resistant liner, it can be set to 20 g / m 2 or less. It is also possible to make it 5 g / m 2 (contact time = 2 minutes) or less. In the present invention, since the sliding angle is controlled by the plastic filler, it is advantageous that the application amount of the water repellent can be freely selected.
本発明塗料中の合成樹脂としては、スチレン・ブタジェン共重合体、スチレン・アクリル共重合体、各種アクリル系共重合体（アクリル酸、アクリル酸メチル、アクリル酸ブチル等の共重合体）等であり、スチレン・アクリル共重合体が好ましいものである。 Examples of the synthetic resin in the paint of the present invention include styrene / butadiene copolymers, styrene / acrylic copolymers, various acrylic copolymers (copolymers such as acrylic acid, methyl acrylate, and butyl acrylate). Styrene / acrylic copolymers are preferred.
ワックスとしては、パラフィンワックス（ｎ−パラフィンワックス、イソパラフィンワックス、シクロパラフィンワックス等）、ポリエチレン系等であり、パラフィンワックスが好ましいものである。 Examples of the wax include paraffin wax (n-paraffin wax, isoparaffin wax, cycloparaffin wax, etc.), polyethylene, and the like, and paraffin wax is preferable.
プラスチック填料としては、密実粒子（填料中に空間を有しない粒子）の場合は、アクリル系とスチレン・アクリル系等であり、その比重は１．０１〜１．０８であり、塗料比重とほぼ同様のため、塗料粘度を１００ｍｓｐ・ｓ以下にしても、填料の沈降は起こらないものである。
中空粒子の場合は、アクリル系とスチレン・アクリル系等であり、その比重は０．４〜１．０８がある。
しかしながら、中空粒子の場合は、填料の中空部分に塗料液が入るため、実比重は塗料比重とほぼ同様になり、塗料粘度を５０ｍＰａ・ｓ以下に低下させても、ほとんど沈降しないものである。
As the plastic filler, in the case of solid particles (particles that do not have a space in the filler), they are acrylic and styrene / acrylic, and the specific gravity is 1.01 to 1.08. For the same reason, no sedimentation of the filler occurs even when the viscosity of the paint is 100 msp · s or less.
In the case of the hollow particles, they are acrylic and styrene / acrylic, and the specific gravity is 0.4 to 1.08.
However, in the case of hollow particles, since the coating liquid enters the hollow portion of the filler, the actual specific gravity is almost the same as the specific gravity of the coating material, and even if the coating viscosity is reduced to 50 mPa · s or less, it hardly precipitates.
更に、プラスチック填料は合成樹脂エマルジョン・ワックスエマルジョンとの分散が容易であり、ライナーへ塗工された後には、プラスチック填料がライナー表面に存在し、滑り角度の低下防止、フレキソ印刷性の向上、合成樹脂接着性の低下防止に役立つものである。 In addition, plastic fillers can be easily dispersed with synthetic resin emulsions and wax emulsions. After being applied to the liner, the plastic filler is present on the liner surface, preventing slip angle reduction, improving flexographic printability, and synthesis. This is useful for preventing deterioration of resin adhesiveness.
従来技術の所謂自家撥水段ボールの場合は、塗料中に填料を配合していないため、塗工後のライナー表面は、塗料中のワックスがブリードアウトし、滑り角度が大幅に低下し、印刷不良と合成樹脂接着剤の接着不良の原因となっていた。 In the case of the so-called self-repellent corrugated cardboard of the prior art, since the filler is not blended in the paint, the liner surface after coating bleeds out the wax in the paint, the sliding angle is greatly reduced, and printing is poor. And the cause of poor adhesion of synthetic resin adhesive.
このため、従来技術では、滑り角度等の段ボールケースとしての特性を維持した状態で、その遮水性を大幅に向上させ、市販耐水ライナー以上にすることは、実際上できないものであった。
本発明は、これらの問題を解消し、コルゲーター貼合工程の簡易なロール塗工機（図1）使用にて、市販耐水ライナー使用の耐水段ボールより高い遮水性を有する段ボールを製造するものである。
For this reason, in the state of the art, it has been impossible in practice to significantly improve the water-blocking property while maintaining the characteristics as a corrugated cardboard case such as a sliding angle and to make it more than a commercially available water-resistant liner.
The present invention solves these problems and produces a corrugated cardboard having a higher water barrier than a water-resistant cardboard using a commercially available water-resistant liner by using a simple roll coater (FIG. 1) in a corrugator bonding process. .
（実施例１）
塗料としては、合成樹脂：スチレン・アクリル共重合体（Ｔｇ３５℃）４０部、ワックス：ｎ−パラフィンワックス（Ｔｇ５７℃）４０部、プラスチック填料：アクリル系密実填料（比重１．０６、粒径０．５μｍ）２０部の配合にて、濃度＝４０％、粘度＝５００ｍＰａ・ｓのものを作成し、作成時塗料とする。
次に、この塗料を稀釈して２２％濃度にし、その粘度を４０ｍＰａ・ｓにし、塗工時塗料とする。
次に、コルゲーター貼合工程の簡易なロール塗工機（図1）使用にて、この塗料をＯＦＫ２８０ライナー（王子板紙）のオモテ面側に約１３ｇ／ｍ２塗工し、塗工後一般中芯１６０（王子板紙）と貼合して撥水段ボールを製造する。
（実施例２）
塗料としては、合成樹脂：スチレン・アクリル共重合体（Ｔｇ３５℃）４２．５部、ワックス：ｎ−パラフィンワックス１３５°Ｆ４２．５部、プラスチック填料：スチレン・アクリル系中空填料（比重０．４７[溶液を含んだ状態の比重は１．０５]、粒径０．５μｍ）１５部の配合にて、濃度＝３３％、粘度＝１００ｍＰａ・ｓのものを作成し、作成時塗料とする。
次に、この塗料を稀釈して１６．５％濃度にし、その粘度を１０ｍＰａ・ｓにし、塗工時塗料とする。
以下、コルゲーター貼合工程での塗工は実施例１と同様
（実施例３）
塗料としては、合成樹脂：スチレン・アクリル共重合体（Ｔｇ３５℃）４２．５部、ワックス：ｎ−パラフィンワックス１３５°Ｆ４２．５部、プラスチック填料：スチレン・アクリル系中空填料（比重０．４０[溶液を含んだ状態での比重は０．９４]、粒径０．５μｍ）１５部の配合にて、濃度＝３３％、粘度＝１００ｍＰａ・ｓのものを作成し、作成時塗料とする。
次に、この塗料を稀釈して１６．５％濃度にし、その粘度を１０ｍＰａ・ｓにし、塗工時塗料とする。
以下、コルゲーター貼合工程での塗工は実施例１と同様
（比較例１）
塗料としては、合成樹脂：スチレン・アクリル共重合体（Ｔｇ３５℃）４０部、ワックス：ｎ−パラフィンワックス（Ｔｇ５７℃）４０部、無機填料：炭酸カルシュウム（比重２．６５、粒径０．１〜０．６μｍ）２０部の配合にて、濃度＝４０％、粘度＝８００ｍＰａ・ｓのものを作成し、作成時塗料とする。
次に、この塗料を稀釈して２２％濃度にし、その粘度を５０ｍＰａ・ｓにし、塗工時塗料とする。
以下、コルゲーター貼合工程での塗工は実施例１と同様
（比較例２）
塗料として、市販撥水剤：リパックスＡ―７４０改（填料の配合なし、近代化学工業）、濃度＝４０％、粘度＝４０ｍＰａ・ｓを使用。
次に、この塗料を稀釈して１６．５％濃度にし、その粘度を１０ｍＰａ・ｓ以下にし、塗工時塗料とする。
以下、コルゲーター貼合工程での塗工は実施例１と同様
（比較例３）
市販耐水ライナー２８０（ＨＰ２８０、王子板紙）と一般中芯１６０（王子板紙）を貼合し、耐水段ボールを製造する。
＜結果＞
＊２）遮水性：段ボールのコッブ吸水量（ＪＩＳ Ｐ ８１４０）を測定し、１５ｇ／ｍ２・２分以下を◎、１５〜２０を○、２０〜２５を△、２５以上を×とする。
＊３）滑り角度：２０°以上を◎、１７〜２０°を△、１７°以下を×とする。
＊４）合成樹脂接着剤での接着性：段ボールの表面に酢酸ビニール系接着剤を５０ｇ／ｍ２以上塗工、次にもう１つの段ボールを貼り合わせ、圧力をかけた状態で１日放置、次に接着部分を手ではがし、ライナーが破壊するものを◎、はがし方法によりライナーの一部が破壊するものを△、ライナーが破壊しないものを×とする。
Example 1
As paints, synthetic resin: 40 parts of styrene / acrylic copolymer (Tg 35 ° C.), wax: 40 parts of n-paraffin wax (Tg 57 ° C.), plastic filler: acrylic solid filler (specific gravity 1.06, particle size 0) 0.5 μm), 20 parts by weight, with a concentration = 40% and a viscosity = 500 mPa · s are prepared and used as the paint at the time of preparation.
Next, this paint is diluted to a concentration of 22%, its viscosity is set to 40 mPa · s, and it is used as a paint at the time of coating.
Next, corrugator bonding step simple roll coating machine (Fig. 1) in use, the paint was about 13 g / m 2 coated on the front surface side of the OFK280 liner (Oji Paperboard), the general post-coating A water-repellent cardboard is manufactured by laminating with a core 160 (prince paper).
(Example 2)
As the paint, synthetic resin: styrene / acrylic copolymer (Tg 35 ° C.) 42.5 parts, wax: n-paraffin wax 135 ° F. 42.5 parts, plastic filler: styrene / acrylic hollow filler (specific gravity 0.47 [ The specific gravity of the solution-containing state is 1.05], the particle size is 0.5 μm), and a composition with a concentration = 33% and a viscosity = 100 mPa · s is prepared and used as a paint at the time of preparation.
Next, the paint is diluted to a concentration of 16.5%, the viscosity is set to 10 mPa · s, and a paint at the time of coating is obtained.
Hereinafter, the coating in the corrugator bonding process is the same as in Example 1.
(Example 3)
As the paint, synthetic resin: styrene / acrylic copolymer (Tg 35 ° C.) 42.5 parts, wax: n-paraffin wax 135 ° F. 42.5 parts, plastic filler: styrene / acrylic hollow filler (specific gravity 0.40 [specific gravity] The specific gravity in the state containing the solution is 0.94], the particle size is 0.5 μm), and the composition is 15% in concentration = 33% and viscosity = 100 mPa · s.
Next, the paint is diluted to a concentration of 16.5%, the viscosity is set to 10 mPa · s, and a paint at the time of coating is obtained.
Hereinafter, the coating in the corrugator bonding process is the same as in Example 1.
(Comparative Example 1)
As paints, synthetic resin: 40 parts of styrene / acrylic copolymer (Tg 35 ° C.), wax: 40 parts of n-paraffin wax (Tg 57 ° C.), inorganic filler: calcium carbonate (specific gravity 2.65, particle size 0.1 to 0.6 μm) 20 parts by weight is prepared with a concentration = 40% and a viscosity = 800 mPa · s, and is used as a paint at the time of preparation.
Next, this paint is diluted to a concentration of 22%, its viscosity is 50 mPa · s, and it is used as a paint at the time of coating.
Hereinafter, the coating in the corrugator bonding step is the same as in Example 1 (Comparative Example 2).
Commercially available water repellent: Repacks A-740 modified (no filler added, modern chemical industry), concentration = 40%, viscosity = 40 mPa · s is used as paint.
Next, the paint is diluted to a concentration of 16.5%, and the viscosity is made 10 mPa · s or less to obtain a paint at the time of coating.
Hereinafter, the coating in the corrugator pasting step is the same as in Example 1 (Comparative Example 3).
A commercially available water-resistant liner 280 (HP280, Oji Paperboard) and a general core 160 (Oji Paperboard) are bonded together to produce a water-resistant cardboard.
<Result>
* 2) Water-imperviousness: Measure the water absorption (JIS P 8140) of corrugated cardboard, and 15 g / m 2 · 2 minutes or less is ◎, 15-20 is ◯, 20-25 is Δ, and 25 or more is ×.
* 3) Sliding angle: 20 ° or more is 、, 17-20 ° is Δ, 17 ° or less is x.
* 4) adhesion synthetic resin adhesive: a vinyl acetate-based adhesive 50 g / m 2 or more on the surface of the cardboard coating, then bonded to another cardboard, allowed to stand for one day in a state of applying pressure, Next, the adhesive part is peeled off by hand, and ◎ indicates that the liner breaks, Δ indicates that part of the liner is broken by the peeling method, and x indicates that the liner does not break.
本発明において、コルゲーターの貼合工程で薬剤を塗工して製造する、所謂自家撥水段ボールの従来技術では困難であった、段ボールの遮水性を大幅に向上することを可能とした。 In the present invention, it has been possible to greatly improve the water barrier property of corrugated cardboard, which has been difficult with the conventional technique of so-called self-water-repellent corrugated cardboard manufactured by applying a chemical in the corrugator bonding process.
Claims (6)
Even if the viscosity of the paint is 100 mPa · s or less, the plastic filler has a hollow particle structure, the particle size is 0.1 to 1.0 μm, and the specific gravity including the solution is 0.9 to 1.1. 4. The corrugated board manufacturing method according to claim 3, wherein sedimentation of the filler is prevented.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941307A (en) * | 2010-06-09 | 2011-01-12 | 武汉华艺柔印环保科技有限公司 | Method for manufacturing wide-width color flexible preprinted corrugated carton |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11279989A (en) * | 1998-03-26 | 1999-10-12 | Oji Paper Co Ltd | Coating liner |
| JP2001248097A (en) * | 1999-12-27 | 2001-09-14 | Oji Paper Co Ltd | Paper for packaging |
| JP2004051130A (en) * | 2002-07-17 | 2004-02-19 | Oji Paper Co Ltd | Packaging method for cold/hot food container, and carton box used for packaging |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11279989A (en) * | 1998-03-26 | 1999-10-12 | Oji Paper Co Ltd | Coating liner |
| JP2001248097A (en) * | 1999-12-27 | 2001-09-14 | Oji Paper Co Ltd | Paper for packaging |
| JP2004051130A (en) * | 2002-07-17 | 2004-02-19 | Oji Paper Co Ltd | Packaging method for cold/hot food container, and carton box used for packaging |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941307A (en) * | 2010-06-09 | 2011-01-12 | 武汉华艺柔印环保科技有限公司 | Method for manufacturing wide-width color flexible preprinted corrugated carton |
| CN101941307B (en) * | 2010-06-09 | 2012-01-04 | 武汉华艺柔印环保科技有限公司 | Method for manufacturing wide-width color flexible preprinted corrugated carton |
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