JP2005206957A - Water-resistant paperboard and method for producing the same - Google Patents
Water-resistant paperboard and method for producing the same Download PDFInfo
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本発明は、水に濡れた後も撥水効果が持続し、寸法安定性、印刷適性に優れた耐水板紙及びその製造方法に関する。 The present invention relates to a water-resistant paperboard that maintains a water-repellent effect even after being wetted and has excellent dimensional stability and printability, and a method for producing the same.
板紙は、紙器、包装、建材等に使用される厚手の紙で、その多くは段ボール原紙として消費される。近年では、板紙が比較的容易にリサイクルできることから、省資源化の要請によりプラスチックや木材等の代替品として種々の分野で板紙が用いられるようになっている。 Paperboard is thick paper used for paper containers, packaging, building materials, etc., and most of it is consumed as corrugated cardboard. In recent years, since paperboard can be recycled relatively easily, paperboard has come to be used in various fields as a substitute for plastics, wood, etc. in response to a demand for resource saving.
紙は原料であるセルロース繊維の水に対する高い親和性により水に弱いという紙特有の性質を示すが、板紙も例外ではなく、例えば吸湿性が高い、あるいは撥水性が低い等の性質を有している。板紙をプラスチック等の代替品として使用する際にはこの性質が原因となって以下のような問題が生じている。 Paper exhibits the unique properties of paper that are weak against water due to the high affinity of cellulose fibers as a raw material for water, but paperboard is no exception, for example, it has properties such as high hygroscopicity or low water repellency. Yes. When paperboard is used as a substitute for plastic or the like, the following problems arise due to this property.
板紙は複数の紙料を抄き合わせることにより紙層を積層して製造するが、各紙層、特に表層と裏層で吸湿の度合いが異なる場合には、紙層により膨張の度合いが異なるため板紙に反りが生じることとなる。 Paperboard is manufactured by laminating paper layers by combining multiple paper stocks, but if the degree of moisture absorption differs between each paper layer, especially the front and back layers, the degree of expansion differs depending on the paper layer. Will be warped.
吸湿による紙の寸法変化を防止すべく、従来ホルマリン系樹脂、メラミン系樹脂、ポリアミド−エピクロロヒドリン系樹脂等の樹脂が使用されている。しかしながら、これらの樹脂を配合しただけでは板紙の反りを完全に防止することはできない。 Conventionally, resins such as formalin-based resins, melamine-based resins, polyamide-epichlorohydrin-based resins have been used to prevent dimensional changes of paper due to moisture absorption. However, the warping of the paperboard cannot be completely prevented only by blending these resins.
一方、板紙の用途によっては高い撥水性が要求される。板紙に撥水性を付与する方法としては、表面にワックスを塗工する方法、あるいはワックスを含浸させる方法が知られている。しかしながら、十分な撥水効果を得ることができる量のワックスを使用すると、ワックスの量が多すぎて板紙がリサイクルできないという問題がある。 On the other hand, high water repellency is required depending on the use of the paperboard. As a method for imparting water repellency to paperboard, a method of applying a wax to the surface or a method of impregnating with wax is known. However, if an amount of wax that can provide a sufficient water repellent effect is used, there is a problem that the amount of wax is too large to recycle the paperboard.
特開２０００−２８１０５６号公報には、表裏両面と断面に撥水剤を塗工した段ボールシートが提案されている（特許文献１）。この段ボールシートは、ワックスの使用量が少ないためリサイクルが可能で、表裏両面に加えて断面からの湿気の浸入を防ぐことができるため撥水性に優れることが記載されている。しかしながら、この段ボールシートは一旦水に濡れてしまうとライナーの内側面やボール紙に水が浸透して段ボールシートの撥水性が低下するため、プラスチック等の代替品として満足できるものではない。
本発明の目的は、撥水効果が持続し、寸法安定性、印刷適性に優れるとともに、リサイクル可能な耐水板紙及びその製造方法を提供することにある。 An object of the present invention is to provide a water-resistant paperboard and a method for producing the water-resistant paperboard that can maintain a water-repellent effect, have excellent dimensional stability and printability, and can be recycled.
本発明者等は鋭意研究の結果、表層と裏層の少なくともいずれかに所定量の撥水剤を内添した板紙は、撥水効果の持続性、寸法安定性、印刷適性に優れることを見出した。更に、この板紙は、リサイクルの際に問題となるワックス等の使用量を少量とすることができるため、容易にリサイクルできることを見出し本発明を完成するに到った。 As a result of diligent research, the present inventors have found that a paperboard in which a predetermined amount of a water repellent agent is internally added to at least one of a surface layer and a back layer is excellent in water repellent effect durability, dimensional stability, and printability. It was. Furthermore, the present invention has been completed by finding that this paperboard can be easily recycled because the amount of wax or the like that becomes a problem during recycling can be reduced.
上記課題を解決する本発明は、以下に記載するものである。 The present invention for solving the above problems is described below.
〔１〕 表層と裏層の間に中層を有する板紙において、表層及び／又は裏層に撥水剤をパルプ固形分に対して０．５〜１．８質量％内添させてなる耐水板紙。 [1] A water-resistant paperboard in which a water-repellent agent is internally added to the surface layer and / or the back layer in an amount of 0.5 to 1.8% by mass with respect to the pulp solid content in a paperboard having an intermediate layer between the surface layer and the back layer.
〔２〕 少なくとも片面の水中に５分間浸漬した後の撥水度がＲ６以上である〔１〕に記載の耐水板紙。 [2] The water-resistant paperboard according to [1], wherein the water repellency after immersing in at least one side of water for 5 minutes is R6 or more.
〔３〕 表層及び／又は裏層の外表面に撥水剤を塗布した〔１〕又は〔２〕に記載の耐水板紙。 [3] The water-resistant paperboard according to [1] or [2], wherein a water repellent is applied to the outer surface of the surface layer and / or the back layer.
〔４〕 抄紙方向に対して垂直方向（横目方向）の水中伸度が２％以下である〔１〕乃至〔３〕のいずれかに記載の耐水板紙。 [4] The water-resistant paperboard according to any one of [1] to [3], wherein the underwater elongation in a direction perpendicular to the papermaking direction (horizontal direction) is 2% or less.
〔５〕 ワックス含有量が１．５質量％以下である〔１〕乃至〔４〕のいずれかに記載の耐水板紙。 [5] The water-resistant paperboard according to any one of [1] to [4], wherein the wax content is 1.5% by mass or less.
〔６〕 表層用紙料及び／又は裏層用紙料に撥水剤を添加して抄紙することを特徴とする〔１〕乃至〔５〕のいずれかに記載の耐水板紙の製造方法。 [6] The method for producing water-resistant paperboard according to any one of [1] to [5], wherein a paper is made by adding a water repellent to the surface layer paper and / or the back layer paper.
本発明の板紙は、撥水効果の持続性、印刷適性に優れ、生鮮品等の段ボールケースとして好適である。例えば本発明の板紙を用いて苗用の段ボールケースを製造し苗を入れ使用した場合、水の散布を繰り返した場合でも撥水効果が持続し、ケースが壊れない。また、水中伸度が低く、寸法安定性に優れることから吸湿による反りが発生しないため、掲示板等に好適である。更に、本発明の板紙は、ワックスの使用量を所定の範囲とすることによりリサイクルが可能となる。従って、本発明の板紙は、プラスチック製品、ベニヤ板等の木材の代替品として有用である。 The paperboard of the present invention has excellent water repellent effect and printability, and is suitable as a corrugated cardboard case for fresh products. For example, when a cardboard case for seedlings is manufactured using the paperboard of the present invention and seedlings are used, the water repellent effect is maintained even when water spraying is repeated, and the case is not broken. Further, since the elongation in water is low and the dimensional stability is excellent, warpage due to moisture absorption does not occur, so that it is suitable for a bulletin board or the like. Furthermore, the paperboard of the present invention can be recycled by setting the amount of wax used within a predetermined range. Therefore, the paperboard of the present invention is useful as a substitute for wood such as plastic products and plywood.
本発明の耐水板紙は、少なくとも３層からなり、第１の表層（以下、単に「表層」という）と第２の表層（以下、単に「裏層」という）の間に中層を設ける。耐水板紙を構成する層は、表層と裏層の間に１の中層を有する３層であってもよいが、強度や厚さが要請される用途には中層を２〜７層設けた合計で４〜９層であることが好ましい。 The water-resistant paperboard of the present invention comprises at least three layers, and an intermediate layer is provided between a first surface layer (hereinafter simply referred to as “surface layer”) and a second surface layer (hereinafter simply referred to as “back layer”). The layer constituting the water-resistant paperboard may be three layers having one middle layer between the surface layer and the back layer, but for applications where strength and thickness are required, a total of two to seven middle layers are provided. 4-9 layers are preferred.
本発明の耐水板紙を構成する原料パルプには、段ボール古紙、地券古紙、新聞古紙、雑誌古紙、色上系古紙、ケント古紙、コート古紙、上質古紙等の古紙パルプや晒クラフトパルプ、未晒クラフトパルプ、機械パルプ等のバージンパルプを、板紙に要求される強度や見栄えなどに応じて用いることができる。 The raw material pulp constituting the water-resistant paperboard of the present invention includes used paper pulp, bleached kraft pulp, bleached kraft pulp, corrugated wastepaper, wastepaper wastepaper, newspaper wastepaper, magazine wastepaper, color-based wastepaper, Kent wastepaper, coated wastepaper, high-quality wastepaper, etc. Virgin pulp such as kraft pulp and mechanical pulp can be used according to the strength and appearance required of the paperboard.
本発明の耐水板紙は、表層、裏層のいずれかに撥水剤を内添させたものであればよい。用途により耐水板紙を１枚のみで使用する場合には、表層と裏層のいずれも撥水剤を含有するものであることが好ましい。 The water-resistant paperboard of the present invention only needs to have a water repellent added internally to either the surface layer or the back layer. When only one sheet of water-resistant paperboard is used depending on the application, it is preferable that both the surface layer and the back layer contain a water repellent.
撥水剤としては、パラフィン系ワックス、天然ワックス等のワックスをエマルジョン化したワックスエマルジョン；ポリアミド系樹脂、ポリアミン系樹脂等の合成樹脂；ポリテトラフルオロエチレン、ポリクロロトリフルオロエチレン等のフッ素樹脂；ポリメチル水素シロキサン、ポリジメチルシロキサン等のシリコーン樹脂を挙げることができる。 As water repellents, wax emulsion obtained by emulsifying wax such as paraffin wax and natural wax; synthetic resin such as polyamide resin and polyamine resin; fluororesin such as polytetrafluoroethylene and polychlorotrifluoroethylene; polymethyl Mention may be made of silicone resins such as hydrogen siloxane and polydimethylsiloxane.
表層又は裏層に内添する撥水剤の含有量は、表層又は裏層のパルプ固形分に対して０．５〜１．８質量％とするが、０．７〜１．５質量％とすることがより好ましい。撥水剤の含有量が０．５質量％未満では板紙の撥水性が不充分となり、１．８質量％を超えると板紙の印刷適性が低下する。 The content of the water-repellent agent internally added to the surface layer or the back layer is 0.5 to 1.8% by mass with respect to the pulp solid content of the surface layer or the back layer, and 0.7 to 1.5% by mass. More preferably. If the content of the water repellent is less than 0.5% by mass, the water repellency of the paperboard becomes insufficient, and if it exceeds 1.8% by mass, the printability of the paperboard decreases.
本発明の耐水板紙は、上述したように、撥水剤としてワックスを使用することも可能であるが、リサイクルの観点から板紙におけるワックスの含有量は極力少なくすることが好ましい。撥水剤としてワックスを使用する場合には、板紙におけるワックスの含有量を乾燥質量基準で１．５質量％以下とすることが好ましい。 As described above, the water-resistant paperboard of the present invention can use wax as a water repellent, but it is preferable to reduce the wax content in the paperboard as much as possible from the viewpoint of recycling. When wax is used as the water repellent, the content of wax in the paperboard is preferably 1.5% by mass or less based on the dry mass.
本発明の耐水板紙の表層又は裏層の外表面には撥水剤を塗工（外添）してもよい。板紙の表面に撥水剤を塗工することにより、板紙の撥水性をより高めることができる。板紙の表面に塗布する撥水剤は、表層又は裏層に内添する撥水剤と同様のものが使用できる。撥水剤の塗工量（固形分）としては、０．１〜１ｇ／ｍ2とすることが好ましい。 A water repellent may be applied (externally added) to the outer surface of the surface layer or the back layer of the water-resistant paperboard of the present invention. By applying a water repellent to the surface of the paperboard, the water repellency of the paperboard can be further increased. As the water repellent applied to the surface of the paperboard, the same water repellent added internally to the surface layer or the back layer can be used. The coating amount (solid content) of the water repellent is preferably 0.1 to 1 g / m 2 .
本発明の耐水板紙は、湿潤時の強度を保つため、湿潤紙力剤を含有することが好ましい。湿潤紙力剤としては、両性ポリアクリルアミド系紙力剤、ポリアミドエピクロロヒドリン系紙力剤等を挙げることができる。 The water-resistant paperboard of the present invention preferably contains a wet paper strength agent in order to maintain strength when wet. Examples of the wet paper strength agent include amphoteric polyacrylamide type paper strength agents and polyamide epichlorohydrin type paper strength agents.
両性ポリアクリルアミドはポリアクリルアミドにカチオン性の基を導入したポリマーであって、例えばアクリルアミド−ビニルモノマー共重合体、アクリルアミド−ジメチルアミノエチルメタクリレート共重合体等のカチオン性モノマーとアクリルアミドとの共重合体や、マンニッヒ変成ポリアクリルアミド、ホフマン分解ポリアクリルアミド等を挙げることができる。 Amphoteric polyacrylamide is a polymer in which a cationic group is introduced into polyacrylamide. For example, a copolymer of acrylamide and a cationic monomer such as acrylamide-vinyl monomer copolymer, acrylamide-dimethylaminoethyl methacrylate copolymer, , Mannich modified polyacrylamide, Hoffmann-degraded polyacrylamide, and the like.
ポリアミドエピクロロヒドリン系紙力剤としては、例えばポリアミドアミン・エピクロロヒドリンを挙げることができる。 Examples of the polyamide epichlorohydrin-based paper strengthening agent include polyamidoamine and epichlorohydrin.
本発明の耐水板紙における湿潤紙力剤の含有量としては、紙力剤を含有するそれぞれの紙層のパルプ固形分に対して０．１〜０．８質量％とすることが好ましい。湿潤紙力剤の含有量が０．１質量％未満では、十分な紙力増強効果が得られず、０．８質量％を超えると添加量に見合う効果が得られにくい。 The content of the wet paper strength agent in the water-resistant paperboard of the present invention is preferably 0.1 to 0.8% by mass with respect to the pulp solid content of each paper layer containing the strength agent. If the content of the wet paper strength agent is less than 0.1% by mass, a sufficient paper strength enhancing effect cannot be obtained, and if it exceeds 0.8% by mass, it is difficult to obtain an effect commensurate with the added amount.
本発明の耐水板紙は、湿潤紙力剤が表層、中層、裏層のいずれの層に含まれていてもよいが、少なくとも中層のいずれか１層に含まれていることが好ましく、全ての中層に含まれていることがより好ましい。 In the water-resistant paperboard of the present invention, the wet paper strength agent may be contained in any one of the surface layer, the middle layer and the back layer, but is preferably contained in at least one of the middle layers. It is more preferable that it is contained in.
上記紙力剤とともにグリオキザールを添加した場合には、本発明の板紙の湿潤紙力をより高めることができる。グリオキザールの含有量としては、パルプ固形分に対して０．２〜１質量％することが好ましい。 When glyoxal is added together with the paper strength agent, the wet paper strength of the paperboard of the present invention can be further increased. As content of a glioxal, it is preferable to carry out 0.2-1 mass% with respect to pulp solid content.
本発明の耐水板紙は、湿潤紙力剤以外の紙力剤や他の添加剤が含まれていてもよい。他の紙力剤としては、例えば、澱粉、酸化澱粉、カルボキシメチル化澱粉等の澱粉；植物ガム；ポリビニルアルコール；カルボキシメチルセルロース等を挙げることができる。添加剤としては、例えばサイズ剤、顔料、定着剤、消泡剤、剥離剤等を挙げることができる。 The water-resistant paperboard of the present invention may contain a paper strength agent other than the wet paper strength agent and other additives. Examples of other paper strength agents include starches such as starch, oxidized starch, and carboxymethylated starch; plant gums; polyvinyl alcohol; carboxymethylcellulose and the like. Examples of the additive include a sizing agent, a pigment, a fixing agent, an antifoaming agent, and a release agent.
本発明の耐水板紙の米坪としては、乾燥質量基準で１５０〜４５０ｇ／ｍ2とすることが好ましく、２００〜４００ｇ／ｍ2とすることがより好ましい。 The rice paper weight of the water-resistant paperboard of the present invention is preferably 150 to 450 g / m 2 and more preferably 200 to 400 g / m 2 on a dry mass basis.
耐水板紙の厚さとしては特に制限はないが、１７０〜６５０μｍとすることが好ましく、２５０〜６００μｍとすることがより好ましい。 Although there is no restriction | limiting in particular as thickness of a water-resistant paperboard, It is preferable to set it as 170-650 micrometers, and it is more preferable to set it as 250-600 micrometers.
本発明の耐水板紙は、少なくとも片面について、水中に５分間浸漬した後のＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．６８による撥水度をＲ６以上とすることが好ましい。上記撥水度は、表層又は裏層に含有させる撥水剤の量を調整することによりかかる範囲とすることができる。 The water-resistant paperboard of the present invention has a JAPAN TAPPI No. after at least one side immersed in water for 5 minutes. The water repellency according to 68 is preferably R6 or more. The water repellency can be set to such a range by adjusting the amount of the water repellent contained in the surface layer or the back layer.
更に、本発明の耐水板紙は、抄紙方向に対して垂直方向（横目方向）のＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．２７の規定による水中伸度を２％以下とすること好ましい。水中伸度は、表層又は裏層の撥水剤の含有量を調整することにより上記範囲とすることが可能である。 Furthermore, the water-resistant paperboard of the present invention has a JAPAN TAPPI No. in the direction perpendicular to the papermaking direction (transverse direction). It is preferable that the underwater elongation according to No. 27 is 2% or less. The elongation in water can be adjusted to the above range by adjusting the content of the water repellent in the surface layer or the back layer.
本発明の耐水板紙は、以下の工程により、公知の多層抄き抄紙機を用いて製造できる。
（１） パルプを水に分散させて得たスラリーに必要により撥水剤や他の成分を添加して混合し、表層、中層、裏層用の紙料を製造する。
（２） それぞれの紙料をワイヤー上で抄紙し、抄き合わせる。
（３） 加圧ロールによりプレスし、水分を除去する。
（４） ドライヤーシリンダーにて乾燥し、必要によりカレンダーにより撥水剤を塗工する。
（５） リールに巻き取り、耐水板紙を得る。
The water-resistant paperboard of the present invention can be produced using a known multilayer paper machine by the following steps.
(1) If necessary, a water repellent and other components are added to and mixed with the slurry obtained by dispersing pulp in water to produce a stock for the surface layer, middle layer and back layer.
(2) Each paper stock is made on a wire and put together.
(3) Press with a pressure roll to remove moisture.
(4) Dry with a dryer cylinder and if necessary apply a water repellent with a calendar.
(5) Wind up on a reel to obtain water-resistant paperboard.
実施例１〜６、比較例１〜５
針葉樹晒クラフトパルプ２０質量％（フリーネス５００ｍｌＣＳＦ）及び広葉樹晒クラフトパルプ８０質量％（フリーネス４００ｍｌＣＳＦ）を含有する紙料を第１層用に調整した。更に、段ボール古紙を離解処理して第２〜５層用の紙料を調整した。第１層又は第５層用の紙料には必要に応じて撥水剤（大和化学社製、コートサイザーＭＮ−２Ｌ）を添加し、第２〜４層用の紙料には湿潤紙力剤（ポリアミド−エピクロロヒドリン樹脂：星光ＰＭＣ社製、ＷＳ５４７）を添加した。これらの紙料を円網多層抄き方式の抄紙機に供給し、抄紙速度を１３０ｍ／分として５層抄き板紙を抄紙した。
Examples 1-6, Comparative Examples 1-5
A stock containing 20% by weight of softwood bleached kraft pulp (freeness 500 ml CSF) and 80% by weight of hardwood bleached kraft pulp (freeness 400 ml CSF) was prepared for the first layer. Furthermore, the paper for the second to fifth layers was adjusted by disaggregating the used corrugated paper. A water repellent (Daiwa Chemical Co., Ltd., Coat Sizer MN-2L) is added to the first layer or the fifth layer as necessary, and wet paper strength is added to the second to fourth layer materials. An agent (polyamide-epichlorohydrin resin: manufactured by Seiko PMC, WS547) was added. These stocks were supplied to a circular multi-layer paper machine, and a five-layer paperboard was made at a papermaking speed of 130 m / min.
抄紙した板紙をプレス、乾燥した後、水に溶解した撥水剤（星光ＰＭＣ社製、パラッテクスＮＳ−６）をカレンダーにより第１層側の表面にのみ塗布し、リールに巻き取った。得られた板紙の各層における撥水剤、湿潤紙力剤の含有量と、撥水剤の表面塗工量を表１、２に示す。板紙はいずれも米坪２２０ｇ／ｍ2（各層の米坪４４ｇ／ｍ2）、厚さ２６５μｍであった。 After the paperboard was pressed and dried, a water-repellent agent (Paratex NS-6, manufactured by Seiko PMC Co., Ltd.) dissolved in water was applied only to the surface on the first layer side by a calendar and wound on a reel. Tables 1 and 2 show the contents of the water repellent and the wet paper strength agent and the surface coating amount of the water repellent in each layer of the obtained paperboard. Paperboard basis weight 220 g / m 2 both the (basis weight 44 g / m 2 in each layer), and a thickness of 265μm.
板紙の撥水度、水中伸度、層間強度、印刷適性を下記の方法により評価した。結果を表１及び２に示す。 The water repellency, elongation in water, interlayer strength, and printability of the paperboard were evaluated by the following methods. The results are shown in Tables 1 and 2.
〈撥水度〉
板紙の第１層側表面の撥水度をＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．６８の規定により測定した。
<Water repellency>
The water repellency of the surface on the first layer side of the paperboard is determined by JAPAN TAPPI No. Measured according to 68 regulations.
〈水中に浸漬後の撥水度〉
試験片を２３℃の水中に５分間浸漬した後、第１層側表面の撥水度をＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．６８の規定により測定した。
<Water repellency after immersion in water>
After immersing the test piece in water at 23 ° C. for 5 minutes, the water repellency of the surface on the first layer side was determined by JAPAN TAPPI No. Measured according to 68 regulations.
〈水中伸度〉
ＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．２７の規定により抄紙方向に対して垂直方向の板紙の伸度を測定した。
<Underwater elongation>
JAPAN TAPPI No. According to 27, the elongation of the paperboard in the direction perpendicular to the papermaking direction was measured.
〈層間強度〉
ＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．１８−２の規定により測定した。
<Interlayer strength>
JAPAN TAPPI No. It was measured according to the provision of 18-2.
〈印刷適性〉
１１０線のアニロックスロールを用いて、板紙の第１層側表面にフレキソインク（サカタインクス製、ＦＫ−９９）をベタ印刷し、インクの滲み、弾きの有無を下記の評価基準で評価した。
評価基準
○：インクの滲み、弾きがない。
×：インクの滲み、弾きがある。
<Printability>
Using a 110-line anilox roll, a flexo ink (manufactured by Sakata Inks, FK-99) was solid-printed on the surface of the first layer side of the paperboard, and the presence or absence of ink bleeding or flipping was evaluated according to the following evaluation criteria.
Evaluation criteria ○: No ink bleeding or repelling.
X: There is ink bleeding and repelling.
※１）ワックス固形分あたりの塗工量
※２）各層におけるパルプ固形分に対する含有量
* 1) Coating amount per wax solid content * 2) Content relative to pulp solid content in each layer
Claims (6)
The method for producing water-resistant paperboard according to any one of claims 1 to 5, wherein a paper is made by adding a water repellent to the surface layer paper and / or the back layer paper.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013129948A (en) * | 2011-12-22 | 2013-07-04 | Daio Paper Corp | Colored paper board |
| JP2015507103A (en) * | 2012-01-17 | 2015-03-05 | エージーシー ケミカルズ アメリカズ，インコーポレイテッド | Method for preparing treated articles and treated articles produced thereby |
| JP2018000149A (en) * | 2016-07-06 | 2018-01-11 | 日本製紙株式会社 | Prefabricated smoky box |
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- 2004-01-20 JP JP2004012350A patent/JP4371826B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013129948A (en) * | 2011-12-22 | 2013-07-04 | Daio Paper Corp | Colored paper board |
| JP2015507103A (en) * | 2012-01-17 | 2015-03-05 | エージーシー ケミカルズ アメリカズ，インコーポレイテッド | Method for preparing treated articles and treated articles produced thereby |
| JP2018000149A (en) * | 2016-07-06 | 2018-01-11 | 日本製紙株式会社 | Prefabricated smoky box |
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