JP2001081696A - Moisture-proof paper - Google Patents
Moisture-proof paperInfo
- Publication number
- JP2001081696A JP2001081696A JP25319399A JP25319399A JP2001081696A JP 2001081696 A JP2001081696 A JP 2001081696A JP 25319399 A JP25319399 A JP 25319399A JP 25319399 A JP25319399 A JP 25319399A JP 2001081696 A JP2001081696 A JP 2001081696A
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- proof
- paper
- resin composition
- proof layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、再生紙に抄紙する
ことが可能な防湿紙に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-proof paper which can be made on recycled paper.
【０００２】[0002]
【従来の技術】防湿紙としては、現在、ポリエチレン、
ポリプロピレン、塩化ビニルなどの合成樹脂を押出積
層、貼合等することで基紙上に防湿層を形成し、防湿性
・防水性を付与したのが一般的に用いられている。かか
る防湿紙は、防湿性に関しては充分に機能を発揮し得る
ものであるが、古紙として回収使用する際の水離解性が
悪く、再利用が困難であった。そのため、省資源，有効
利用の観点から大きな問題であった。2. Description of the Related Art Currently, polyethylene,
It is generally used that a moisture-proof layer is formed on a base paper by extruding and laminating a synthetic resin such as polypropylene, vinyl chloride, or the like to impart moisture-proof and waterproof properties. Such moisture-proof paper can sufficiently exhibit its function with respect to moisture-proof properties, but has poor water disintegration properties when recovered and used as used paper, and is difficult to reuse. Therefore, this is a major problem from the viewpoint of resource saving and effective utilization.
【０００３】これに対し、リサイクル可能な防湿紙とし
て、ワックス単独もしくは合成ゴム系合成ゴム系ラテッ
クスとの混合液を塗布して基紙上に防湿層を形成する方
法（特公平３−１０７５９号）、アクリル系エマルジョ
ンとワックスの混合液を塗布して基紙上に防湿層を形成
する方法（特公平２−１６７１号、特願平３−６９０５
０号）などが開示されている。これらの防湿紙は、防湿
層が水離解性を有するため、古紙として再使用可能であ
る。[0003] On the other hand, a method for forming a moisture-proof layer on a base paper by applying a mixture of wax alone or a synthetic rubber-based synthetic rubber-based latex as recyclable moisture-proof paper (Japanese Patent Publication No. 3-10759), A method of forming a moisture-proof layer on a base paper by applying a mixture of an acrylic emulsion and a wax (Japanese Patent Publication No. 2-1671, Japanese Patent Application No. 3-6905).
No. 0) is disclosed. These moisture-proof papers can be reused as waste paper because the moisture-proof layer has water disintegration properties.
【０００４】[0004]
【発明が解決しようとする課題】上記リサイクル可能な
防湿紙は、防湿層から組成物たるワックスがブリードア
ウトするおそれがあるため、ロール状に巻き取った場
合、防湿層表面のワックスが当接する防湿紙の裏面に付
着する。そのため、防湿紙の裏面は非常に滑り易くな
り、防湿紙の包装物を並び揃える時に不揃いになった
り、滑り落ちたり、さらに重量物を包装した場合は運搬
時に互いにずれて運搬中に落下するなどの重大な問題が
発生する。また、上述のように防湿層表面にブリードア
ウトしたワックスによって包装物を汚染してしまうとい
う不都合もある。In the above-mentioned recyclable moisture-proof paper, the wax as a composition may bleed out from the moisture-proof layer. Therefore, when wound up in a roll, the moisture-proof paper on which the wax on the surface of the moisture-proof layer comes into contact. Attaches to the back of paper. For this reason, the back of the moisture-proof paper becomes very slippery, becomes uneven when packing the moisture-proof paper, or slides down. Serious problems occur. There is also a disadvantage that the package is contaminated by the wax bleed out on the surface of the moisture-proof layer as described above.
【０００５】本発明はこれらの不都合に鑑みてなされた
ものであり、上記不都合の原因であるワックスを含ま
ず、かつ、古紙としてリサイクルが可能な防湿紙の提供
を目的とするものである。The present invention has been made in view of these disadvantages, and an object of the present invention is to provide a moisture-proof paper which does not contain wax which causes the above-mentioned disadvantages and which can be recycled as used paper.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
になされた発明は、基紙と防湿層とを有する防湿紙であ
って、前記防湿層が合成ゴム系ラテックスとアクリル系
エマルジョンとを含有する樹脂組成物から形成されるも
のである。The invention made to solve the above-mentioned problem is a moisture-proof paper having a base paper and a moisture-proof layer, wherein the moisture-proof layer contains a synthetic rubber-based latex and an acrylic emulsion. It is formed from a resin composition.
【０００７】この手段によれば、ガラス転移温度が比較
的低く柔らかい合成ゴム系ラテックスと、ガラス転移温
度が比較的高く硬いアクリル系エマルジョンとを配合す
ることで、防湿層を構成する樹脂組成物のガラス転移温
度を、防湿性と離解性とが高次元で調和する１５℃以上
４０℃以下にすることができる。その結果、防湿紙の基
本性能である防湿性を維持しつつ、古紙としてのリサイ
クルを容易にすることができる。According to this means, by blending a soft synthetic rubber-based latex having a relatively low glass transition temperature and a hard acrylic emulsion having a relatively high glass transition temperature, the resin composition constituting the moisture-proof layer is formed. The glass transition temperature can be set to 15 ° C. or more and 40 ° C. or less, in which the moisture resistance and the disintegration are harmonized at a high level. As a result, recycling as used paper can be facilitated while maintaining the moisture-proof property, which is the basic performance of the moisture-proof paper.
【０００８】また、上記従来の防湿紙のようにワックス
を配合していないので、防湿層表面へのワックスのブリ
ードアウトによる不都合、つまり包装物の滑落や汚染を
防止することができる。Further, since no wax is blended unlike the above-mentioned conventional moisture-proof paper, it is possible to prevent inconvenience due to bleed-out of the wax on the surface of the moisture-proof layer, that is, it is possible to prevent the package from slipping or being contaminated.
【０００９】なお、上記防湿層を形成する樹脂組成物に
はさらに粒状の充填剤を含有させることができる。ここ
で「粒状」とは、文字通り粒の状態を意味し、具体的に
は柱状、金平糖状、球状、樽状などは含まれるが、平板
状、薄片状、長棒状などは含まれない概念である。かか
る充填剤を配合することで、防湿層中の水蒸気の透過面
積を小さくでき、その結果、防湿性を向上させることが
できる。また防湿層中に配合する充填剤を粒状にしてい
るため、リサイクル時に当該防湿紙を小片に剪断する場
合、充填剤により刃物を損傷する不都合を低減すること
ができる。The resin composition for forming the moisture-proof layer may further contain a particulate filler. Here, the term “granular” literally means a granular state, and specifically includes a columnar shape, a confetti-like shape, a spherical shape, a barrel shape, and the like, but does not include a flat shape, a flake shape, a long rod shape, and the like. is there. By blending such a filler, the water vapor transmission area in the moisture-proof layer can be reduced, and as a result, the moisture-proof property can be improved. Further, since the filler to be blended in the moisture-proof layer is made into a granular form, when the moisture-proof paper is sheared into small pieces during recycling, the inconvenience of damaging the blade by the filler can be reduced.
【００１０】[0010]
【発明の実施の形態】以下、適宜図面を参照しつつ本発
明の実施の形態を詳説する。図１は本発明の一実施形態
に係る防湿紙を示す模式的断面図である。図１の防湿紙
１は、基紙２と防湿層３とからなる。Embodiments of the present invention will be described below in detail with reference to the drawings as appropriate. FIG. 1 is a schematic sectional view showing a moisture-proof paper according to one embodiment of the present invention. 1 includes a base paper 2 and a moisture-proof layer 3.
【００１１】基紙２を構成する紙素材は、特に限定され
るものではなく、種々の紙素材を使用することができ
る。だたし、リサイクル性を考慮すると、機械的離解作
用によって水中で分散しやすいものが好ましく、例え
ば、広葉樹クラフトパルプや針葉樹クラフトパルプのよ
うな化学パルプ、機械パルプを原料とした上質紙、中質
紙、片艶クラフト紙、両更クラフト紙、クラフト伸長紙
等が挙げられる。この基紙２の坪量も格別の限定はな
く、３０〜３００ｇ／ｍ2程度で適宜目的に応じて選択
するとよい。The paper material constituting the base paper 2 is not particularly limited, and various paper materials can be used. However, in consideration of recyclability, it is preferable to be easily dispersible in water by mechanical disaggregation.For example, chemical pulp such as hardwood kraft pulp and softwood kraft pulp, fine paper made from mechanical pulp, and medium Examples of the paper include kraft paper, single gloss kraft paper, Ryoso kraft paper, and kraft stretch paper. The basis weight of the base paper 2 is not particularly limited, and may be appropriately selected depending on the purpose at about 30 to 300 g / m 2 .
【００１２】防湿層３は特定の組成の樹脂組成物から形
成されている。防湿層３を構成する樹脂組成物は、合成
ゴム系ラテックスとアクリル系エマルジョンとを主に含
有するものである。かかる合成ゴム系ラテックスとアク
リル系エマルジョンとの配合比率は、重量比で５０：１
００〜１００：５０にするとよい。これは、アクリル系
エマルジョンの配合比が上記範囲より小さいと、柔らか
く、水離解性及びブロッキングが悪くなり、逆に、アク
リル系エマルジョンの配合比が上記範囲を超えると、硬
く、防湿性が悪くなるとなることからである。The moisture-proof layer 3 is formed from a resin composition having a specific composition. The resin composition constituting the moisture-proof layer 3 mainly contains a synthetic rubber-based latex and an acrylic emulsion. The mixing ratio of the synthetic rubber latex and the acrylic emulsion is 50: 1 by weight.
It is good to set it to 00-100: 50. This is because, when the blending ratio of the acrylic emulsion is smaller than the above range, it is soft, water disintegration and blocking are deteriorated, and conversely, when the blending ratio of the acrylic emulsion exceeds the above range, it is hard and the moisture resistance is deteriorated. Because it becomes.
【００１３】また防湿層３を形成する樹脂組成物のガラ
ス転移温度は１５℃以上４０℃以下にするとよい。ガラ
ス転移温度が上記範囲より小さいと、柔軟で伸びが大き
くなり、この伸びが離解時に受ける剪断力に対しての抵
抗力となり、細かく分離，分散され難く、離解性が非常
に劣るものとなる。逆に、ガラス転移温度が上記範囲を
超えると、非常に堅く、脆くなり、伸びが小さくなるた
め、離解性は非常に良好になるが、防湿性、特に折り曲
げ時の防湿性が悪くなる。従って、防湿層３を構成する
樹脂組成物のガラス転移温度は上記範囲、さらに好まし
くは２０℃以上３０℃以下の範囲にする必要がある。The glass transition temperature of the resin composition forming the moisture-proof layer 3 is preferably 15 ° C. or more and 40 ° C. or less. When the glass transition temperature is lower than the above range, the resin is flexible and has a large elongation, and the elongation becomes a resistance to a shearing force applied at the time of defibration. Conversely, when the glass transition temperature exceeds the above range, the material becomes very hard, brittle, and has a small elongation, so that the disintegration becomes very good, but the moisture resistance, particularly the moisture resistance at the time of bending deteriorates. Therefore, the glass transition temperature of the resin composition constituting the moisture-proof layer 3 needs to be in the above range, more preferably in the range of 20 ° C. or more and 30 ° C. or less.
【００１４】上記合成ゴム系ラテックスとしては、具体
的には、スチレンブタジエンラテックス、メタクリレー
トブタジエンラテックス、アクリルニトリルブタジエン
ラテックスなどが挙げられるが、耐水性が良好で、伸び
がよく折割れによる亀裂が生じにくいスチレンブタジエ
ンラテックスが好適である。ここで重合性単量体はスチ
レン及び１，３−ブタジエンを主体とするが、その他の
スチレンおよび１，３−ブタジエンと共重合可能な単量
体を本発明の目的を損なわない範囲で使用することがで
きる。その他のスチレン及び１，３−ブタジエンと共重
合可能な単量体としては、（ａ）α−メチルスチレン、
ビニルトルエン、ｐ−ｔ−ブチルトルエン、クロロスチ
レンなどの芳香族ビニル単量体、（ｂ）（メタ）アクリ
ル酸メチル、（メタ）アクリル酸エチル、（メタ）アク
リル酸プロピル、（メタ）アクリル酸ｎ−アミル、（メ
タ）アクリル酸イソアミル、（メタ）アクリル酸ｎ−ヘ
キシル、（メタ）アクリル酸２−エチルヘキシル、（メ
タ）アクリル酸ｎ−オクチル、（メタ）アクリル酸２−
ヒドロキシエチル、（メタ）アクリル酸ヒドロキシプロ
ピルなどの（メタ）アクリル酸エステル単量体、（ｃ）
（メタ）アクリロニトリルなどのシアノ基含有エチレン
性不飽和単量体、（ｄ）アクリル酸グリシジル、メタク
リル酸グリシジル等のエチレン性不飽和酸のグリシジル
エステル、（ｅ）アリルグリシジルエーテル等の不飽和
アルコールのグリシジルエーテル、（ｆ）（メタ）アク
リルアミド、Ｎ−メチロール（メタ）アクリルアミド、
Ｎ−メチロール（メタ）アクリルアミド、Ｎ−ブトキシ
メチル（メタ）アクリルアミド等の（メタ）アクリルア
ミド系単量体等が挙げられ、これらの重合性単量体を単
独でまたは二種以上を組み合わせて用いることができ
る。Specific examples of the synthetic rubber-based latex include styrene butadiene latex, methacrylate butadiene latex, and acrylonitrile butadiene latex, which have good water resistance, good elongation, and are less likely to be cracked by breaking. Styrene butadiene latex is preferred. Here, the polymerizable monomer is mainly composed of styrene and 1,3-butadiene, but other monomers copolymerizable with styrene and 1,3-butadiene are used within a range not to impair the object of the present invention. be able to. Other monomers copolymerizable with styrene and 1,3-butadiene include (a) α-methylstyrene,
Aromatic vinyl monomers such as vinyltoluene, pt-butyltoluene, and chlorostyrene; (b) methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, (meth) acrylic acid n-amyl, isoamyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, 2- (meth) acrylate
(C) a (meth) acrylate monomer such as hydroxyethyl and hydroxypropyl (meth) acrylate;
(E) glycidyl esters of ethylenically unsaturated acids such as (d) glycidyl acrylate and glycidyl methacrylate, and (e) unsaturated alcohols such as allyl glycidyl ether. Glycidyl ether, (f) (meth) acrylamide, N-methylol (meth) acrylamide,
(Meth) acrylamide-based monomers such as N-methylol (meth) acrylamide and N-butoxymethyl (meth) acrylamide, and the like. These polymerizable monomers may be used alone or in combination of two or more. Can be.
【００１５】上記アクリル系エマルジョンとしては、具
体的には、スチレンおよびスチレン誘導体、アクリル酸
（メタクリル酸）、アクリル酸（メタクリル酸）エステ
ル等を共重合したアクリルコポリマー、アクリル−スチ
レンコポリマー等の共重合体系を用いることができる。
かかるアクリル系エマルジョンを合成ゴム系ラテックス
に混合して用いることによって容易にガラス転移温度を
上記目的の範囲に制御することができる。Specific examples of the acrylic emulsion include copolymers of styrene, styrene derivatives, acrylic acid (methacrylic acid), acrylic acid (methacrylic acid) ester and the like, and acrylic copolymers such as acrylic-styrene copolymer. A scheme can be used.
By using such an acrylic emulsion mixed with a synthetic rubber-based latex, the glass transition temperature can be easily controlled within the above-mentioned range.
【００１６】上記防湿層３を形成する樹脂組成物には、
さらに粒状の充填剤を配合することができる。かかる充
填剤としては、具体的には（ａ）炭酸カルシウム、タル
ク、硫酸バリウム、酸化チタン、カオリンなどの無機充
填剤、（ｂ）アクリル樹脂ビーズ、スチレン樹脂ビー
ズ、ポリエチレン樹脂ビーズ、ウレタン樹脂ビーズなど
の有機充填剤のうち１種又は２種以上を用いることがで
きる。上述のように、充填剤の配合によって防湿性を向
上できる。The resin composition forming the moisture-proof layer 3 includes:
Further, a particulate filler can be blended. Specific examples of such fillers include (a) inorganic fillers such as calcium carbonate, talc, barium sulfate, titanium oxide, and kaolin; (b) acrylic resin beads, styrene resin beads, polyethylene resin beads, and urethane resin beads. One or more of the organic fillers can be used. As described above, the moisture resistance can be improved by blending the filler.
【００１７】上記充填剤の粒径は、３μｍ以上３０μｍ
以下が好ましい。これは、充填剤の粒径が上記範囲より
小さいと、防湿性を向上させる効果が小さく、逆に、上
記範囲を超えると、防湿層３表面に凹凸が生じる、その
防湿層３表面の凸部により内容物に損傷を与える、剪断
時に刃物を損傷するなどの不都合が生じるおそれがある
ことからである。The particle size of the filler is 3 μm or more and 30 μm or more.
The following is preferred. If the particle size of the filler is smaller than the above range, the effect of improving the moisture-proof property is small. Conversely, if the particle size exceeds the above range, irregularities are generated on the surface of the moisture-proof layer 3. This may cause inconveniences such as damage to the contents and damage to the blade during shearing.
【００１８】次に、当該防湿紙１の製造方法について説
明する。まず、合成ゴム系ラテックスとアクリル系エマ
ルジョンとの混合物中に充填剤を分散して防湿層３を構
成する樹脂組成物を作る。このとき必要とあらば、デン
プン、ポリビニルアルコール等の水溶性樹脂を保護コロ
イドとして用いたり、ポリカルボン酸などの分散剤、消
泡剤、界面活性剤、色合い調成剤を添加したりすること
ができる。このようにして調成した樹脂組成物を基紙２
上に塗工し、乾燥することで防湿層３を形成する。乾燥
温度は樹脂組成物が十分に成膜する熱量を与えれば十分
であるため一般の塗工紙と同等の乾燥条件でよい。ま
た、基紙２の防湿層３と反対側の面にはカール防止のた
めに水塗りをする方が好ましい。Next, a method of manufacturing the moisture-proof paper 1 will be described. First, a filler is dispersed in a mixture of a synthetic rubber-based latex and an acrylic-based emulsion to prepare a resin composition constituting the moisture-proof layer 3. At this time, if necessary, it is possible to use a water-soluble resin such as starch or polyvinyl alcohol as a protective colloid, or to add a dispersant such as polycarboxylic acid, an antifoaming agent, a surfactant, or a color adjusting agent. it can. The resin composition prepared in this manner was used as a base paper 2
The moisture-proof layer 3 is formed by coating on top and drying. The drying temperature is sufficient as long as it gives a sufficient amount of heat for the resin composition to form a film, so that the drying conditions may be the same as those for general coated paper. Further, it is preferable to coat the surface of the base paper 2 on the side opposite to the moisture-proof layer 3 with water to prevent curling.
【００１９】上記防湿層３を形成するための樹脂組成物
の塗工量は、固形分換算で、５〜５０ｇ／ｍ2の範囲が
好ましく、１０〜３０ｇ／ｍ2の範囲が特に好ましい。
上記塗工量が５ｇ／ｍ2より小さいと防湿性が大幅に劣
化し、５０ｇ／ｍ2を越えると透湿度の向上が頭打ちと
なるので非経済的である。The coating amount of the resin composition for forming the moisture-proof layer 3 is preferably in the range of 5 to 50 g / m 2 , more preferably 10 to 30 g / m 2 , in terms of solid content.
If the coating amount is less than 5 g / m 2 , the moisture-proof property will be significantly deteriorated, and if it exceeds 50 g / m 2 , the improvement in moisture permeability will level off, which is uneconomical.
【００２０】上述のように樹脂組成物を塗工するための
設備としては、特に限定されず、例えばエアナイフコー
ター、バーコーター、ロールコーター、ブレードコータ
ー、ゲートロールコーター等を用いることができる。特
に、ブレードコーター、バーコーター、エアナイフコー
ターなどの塗工表面をスクレイプする塗工方式が、防湿
層３表面の平滑性を促進する傾向があるので好ましい。As described above, the equipment for applying the resin composition is not particularly limited, and for example, an air knife coater, a bar coater, a roll coater, a blade coater, a gate roll coater and the like can be used. In particular, a coating method such as a blade coater, a bar coater, or an air knife coater that scrapes the coating surface is preferable because it tends to promote the smoothness of the surface of the moisture-proof layer 3.
【００２１】なお、本発明の防湿紙は上記実施形態に限
定されるものではなく、例えば、基紙２の両面に防湿層
３を形成するものも可能である。The moisture-proof paper of the present invention is not limited to the above embodiment. For example, it is possible to form a moisture-proof layer 3 on both sides of the base paper 2.
【００２２】[0022]
【実施例】以下、実施例に基づき本発明を詳述するが、
この実施例の記載に基づいて本発明が限定的に解釈され
るべきものではないことはもちろんである。Hereinafter, the present invention will be described in detail with reference to Examples.
Of course, the present invention should not be construed as being limited based on the description of this embodiment.
【００２３】［実施例１］ＳＢＲ（Ｔｇ；−１０℃）１
００重量部とアクリルエマルジョン（Ｔｇ；６５℃）５
０重量部とを混合して塗工液を調製し、この塗工液を坪
量が７５ｇ／ｍ2の基紙表面に２０ｇ／ｍ2塗工して実施
例１の防湿紙を得た。[Example 1] SBR (Tg; -10 ° C) 1
00 parts by weight and acrylic emulsion (Tg; 65 ° C) 5
0 g parts by weight to prepare a coating solution, and applying this coating solution to a base paper surface having a basis weight of 75 g / m 2 at 20 g / m 2 to obtain a moisture-proof paper of Example 1.
【００２４】［実施例２］アクリルエマルジョンを７５
重量部混合した以外は上記実施例１と同様にして実施例
２の防湿紙を得た。Example 2 An acrylic emulsion was used
A moisture-proof paper of Example 2 was obtained in the same manner as in Example 1 except that the parts by weight were mixed.
【００２５】［実施例３］アクリルエマルジョンを１０
０重量部混合した以外は上記実施例１と同様にして実施
例３の防湿紙を得た。[Example 3] Acrylic emulsion was added to 10
A moisture-proof paper of Example 3 was obtained in the same manner as in Example 1 except that 0 parts by weight were mixed.
【００２６】［実施例４］ＳＢＲ７５重量部とアクリル
エマルジョン１００重量部を混合した以外は上記実施例
１と同様にして実施例４の防湿紙を得た。Example 4 A moisture-proof paper of Example 4 was obtained in the same manner as in Example 1 except that 75 parts by weight of SBR and 100 parts by weight of acrylic emulsion were mixed.
【００２７】［実施例５］ＳＢＲ５０重量部混合した以
外は上記実施例４と同様にして実施例５の防湿紙を得
た。Example 5 A moisture-proof paper of Example 5 was obtained in the same manner as in Example 4 except that 50 parts by weight of SBR were mixed.
【００２８】［実施例６］ＳＢＲ４０重量部混合した以
外は上記実施例４と同様にして実施例６の防湿紙を得
た。Example 6 A moisture-proof paper of Example 6 was obtained in the same manner as in Example 4 except that 40 parts by weight of SBR were mixed.
【００２９】［実施例７］アクリルエマルジョンを４０
重量部混合した以外は上記実施例１と同様にして実施例
７の防湿紙を得た。[Example 7] Acrylic emulsion was treated with 40
A moisture-proof paper of Example 7 was obtained in the same manner as in Example 1 except that the parts by weight were mixed.
【００３０】［実施例８］アクリルエマルジョンを２０
重量部混合した以外は上記実施例１と同様にして実施例
８の防湿紙を得た。Example 8 Acrylic emulsion was added to 20
A moisture-proof paper of Example 8 was obtained in the same manner as in Example 1 except that the parts by weight were mixed.
【００３１】［比較例１］ＳＢＲのみからなる塗工液を
用いた以外は上記実施例１と同様にして比較例１の防湿
紙を得た。Comparative Example 1 A moisture-proof paper of Comparative Example 1 was obtained in the same manner as in Example 1 except that a coating solution consisting of only SBR was used.
【００３２】［比較例２］アクリルエマルジョンのみか
らなる塗工液を用いた以外は上記実施例１と同様にして
比較例２の防湿紙を得た。Comparative Example 2 A moisture-proof paper of Comparative Example 2 was obtained in the same manner as in Example 1 except that a coating solution consisting of only an acrylic emulsion was used.
【００３３】［特性の評価］上記実施例１〜８及び比較
例１、２の防湿紙を用い、それらの防湿層を構成する樹
脂組成物のガラス転移温度を測定し、さらに以下に示す
方法で透湿度と離解性を評価した。その結果を下記の表
１に示す。 （１）透湿度の測定方法 透湿度はＪＩＳ−Ｚ−０２０８（Ｂ法）により測定し
た。なお、表１に記載の数値の単位はｇ／ｍ2・２４ｈ
である。 （２）離解性の評価方法 ５００ｍｌの水に試料１．５ｇ（パルプ濃度０．３％）
を加えて、刃を丸くした家庭用ミキサー（ナショナルＭ
Ｘ−１２００Ｇ）を用いて常温で３分間（電圧６０Ｖ）
解離し、次にこの解離した試料を標準フルイ（メッシュ
２８（５９０μｍ））で手漉きし、プリンターヒーター
（１５０℃、鏡面）により約１０分間乾燥させた後、目
視により表面の樹脂残を確認し、１ｍｍ以下が○、１ｍ
ｍ〜５ｍｍが△、５ｍｍ以上が×の３段階で評価した。[Evaluation of Properties] Using the moisture-proof papers of Examples 1 to 8 and Comparative Examples 1 and 2, the glass transition temperatures of the resin compositions constituting the moisture-proof layers were measured, and the following method was used. The moisture permeability and defibration properties were evaluated. The results are shown in Table 1 below. (1) Method of measuring moisture permeability The moisture permeability was measured according to JIS-Z-0208 (Method B). The unit of the numerical values shown in Table 1 is g / m 2 · 24h
It is. (2) Method of evaluating disintegration 1.5 g of sample in 500 ml of water (pulp concentration 0.3%)
, And a household mixer with a rounded blade (National M
X-1200G) at room temperature for 3 minutes (voltage 60V)
After dissociation, the dissociated sample is hand-crafted with a standard sieve (mesh 28 (590 μm)), dried for about 10 minutes by a printer heater (150 ° C., mirror surface), and visually checked for resin residue on the surface. 1mm or less is ○, 1m
m to 5 mm were evaluated as △, and 5 mm or more was evaluated as x.
【００３４】[0034]
【表１】 [Table 1]
【００３５】透湿度が約４０以下で透湿性に優れるの
で、上記表１からわかるように、実施例１〜８の防湿紙
は、透湿性と離解性とをともに満たす。Since the moisture permeability is excellent when the moisture permeability is about 40 or less, as shown in Table 1, the moisture-proof papers of Examples 1 to 8 satisfy both moisture permeability and disaggregation.
【００３６】[0036]
【発明の効果】以上説明したように、本発明の防湿紙に
よれば、防湿層を構成する樹脂組成物のガラス転移温度
を防湿性と離解性とが高次元で調和する１５℃以上４０
℃以下にすることができ、その結果、防湿紙の基本性能
である防湿性を維持しつつ、古紙としてのリサイクルが
容易になる。また、上記従来の防湿紙のようにワックス
を配合していないので、ワックスのブリードアウトによ
る不都合、つまり包装物の滑りや汚染を防止できる。As described above, according to the moisture-proof paper of the present invention, the glass transition temperature of the resin composition constituting the moisture-proof layer is adjusted to a value between 15 ° C. and 40 ° C. at which the moisture-proof property and the disaggregation property match in a high dimension.
° C or less, and as a result, recycling as used paper becomes easy while maintaining the moisture-proof property which is the basic performance of the moisture-proof paper. Further, since no wax is blended unlike the above-mentioned conventional moisture-proof paper, it is possible to prevent inconvenience due to bleed-out of the wax, that is, slippage and contamination of the package.
【図１】本発明の一実施形態に係る防湿紙を示す模式的
断面図である。FIG. 1 is a schematic sectional view showing a moisture-proof paper according to an embodiment of the present invention.
１ 防湿紙 ２ 基紙 ３ 防湿層 1 Moistureproof paper 2 Base paper 3 Moistureproof layer
【手続補正書】[Procedure amendment]
【提出日】平成１２年３月３１日（２０００．３．３
１）[Submission date] March 31, 2000 (200.3.3.
1)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
になされた発明は、基紙と防湿層とを有する防湿紙であ
って、前記防湿層が合成ゴム系ラテックスとアクリル系
エマルジョンと粒状の充填剤とを含有するガラス転移温
度が１５℃以上４０℃以下の樹脂組成物から形成されて
おり、上記粒状の充填剤の粒径が３μｍ以上３０μｍ以
下であることを特徴とするものである。The invention made to solve the above-mentioned problem is a moisture-proof paper having a base paper and a moisture-proof layer, wherein the moisture-proof layer is made of a synthetic rubber-based latex, an acrylic emulsion and a granular material. It is formed of a resin composition containing a filler and having a glass transition temperature of 15 ° C. or more and 40 ° C. or less, and the particle size of the granular filler is 3 μm or more and 30 μm or less.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００９】さらに、上記防湿層を形成する樹脂組成物
には粒状の充填剤を含有させることていることから、防
湿層中の水蒸気の透過面積を小さくでき、その結果、防
湿性を向上させることができる。また、防湿層中に配合
する充填剤を粒状にしているため、リサイクル時に当該
防湿紙を小片に剪断する場合、充填剤により刃物を損傷
する不都合を低減することができる。ここで「粒状」と
は、文字通り粒の状態を意味し、具体的には柱状、金平
糖状、球状、樽状などは含まれるが、平板状、薄片状、
長棒状などは含まれない概念である。Furthermore, since the resin composition for forming the moisture-proof layer contains a particulate filler, the water-permeable area of the moisture-proof layer can be reduced, and as a result, the moisture-proof property can be improved. Can be. In addition, since the filler compounded in the moisture-proof layer is made into a granular form, when the moisture-proof paper is sheared into small pieces at the time of recycling, the inconvenience of damaging the blade by the filler can be reduced. Here, “granular” literally means a granular state, and specifically includes a columnar shape, a confetti-like shape, a spherical shape, a barrel shape, and the like, but a flat shape, a flaky shape,
It is a concept that does not include a long bar shape.
Claims (4)
て、 前記防湿層が合成ゴム系ラテックスとアクリル系エマル
ジョンとを含有する樹脂組成物から形成されていること
を特徴とする防湿紙。1. A moisture-proof paper having a base paper and a moisture-proof layer, wherein the moisture-proof layer is formed from a resin composition containing a synthetic rubber-based latex and an acrylic emulsion. .
て、合成ゴム系ラテックスとアクリル系エマルジョンと
の配合比率が、重量比で５０：１００〜１００：５０で
ある請求項１に記載の防湿紙。2. The moisture-proof paper according to claim 1, wherein in the resin composition forming the moisture-proof layer, the compounding ratio of the synthetic rubber-based latex and the acrylic emulsion is 50: 100 to 100: 50 by weight. .
ス転移温度が１５℃以上４０℃以下である請求項１又は
請求項２に記載の防湿紙。3. The moisture-proof paper according to claim 1, wherein the resin composition forming the moisture-proof layer has a glass transition temperature of 15 ° C. or more and 40 ° C. or less.
に粒状の充填剤を含む請求項１、請求項２又は請求項３
に記載の防湿紙。4. The resin composition for forming the moisture-proof layer further comprises a particulate filler.
Moisture proof paper according to the above.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11253193A JP3088423B1 (en) | 1999-09-07 | 1999-09-07 | Moisture proof paper |
| TW089106969A TWI278557B (en) | 1999-09-07 | 2000-04-14 | Moisture-proof paper |
| KR10-2000-0029934A KR100371272B1 (en) | 1999-09-07 | 2000-06-01 | Moisture proof paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11253193A JP3088423B1 (en) | 1999-09-07 | 1999-09-07 | Moisture proof paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3088423B1 JP3088423B1 (en) | 2000-09-18 |
| JP2001081696A true JP2001081696A (en) | 2001-03-27 |
Family
ID=17247856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11253193A Expired - Fee Related JP3088423B1 (en) | 1999-09-07 | 1999-09-07 | Moisture proof paper |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3088423B1 (en) |
| KR (1) | KR100371272B1 (en) |
| TW (1) | TWI278557B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004031480A1 (en) * | 2002-10-02 | 2004-04-15 | Pt. Pabrik Kertas Tjiwi Kimia Tbk. | Recyclable moistureproof packaging paper |
| JP2005290637A (en) * | 2004-04-02 | 2005-10-20 | Nippon Paper Industries Co Ltd | Water-resistant paper |
-
1999
- 1999-09-07 JP JP11253193A patent/JP3088423B1/en not_active Expired - Fee Related
-
2000
- 2000-04-14 TW TW089106969A patent/TWI278557B/en not_active IP Right Cessation
- 2000-06-01 KR KR10-2000-0029934A patent/KR100371272B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004031480A1 (en) * | 2002-10-02 | 2004-04-15 | Pt. Pabrik Kertas Tjiwi Kimia Tbk. | Recyclable moistureproof packaging paper |
| CN100383338C (en) * | 2002-10-02 | 2008-04-23 | 集伟纸业化工股份有限公司 | Recyclable moisture proof packaging paper |
| JP2005290637A (en) * | 2004-04-02 | 2005-10-20 | Nippon Paper Industries Co Ltd | Water-resistant paper |
| JP4480448B2 (en) * | 2004-04-02 | 2010-06-16 | 日本製紙株式会社 | Waterproof paper |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100371272B1 (en) | 2003-02-06 |
| TWI278557B (en) | 2007-04-11 |
| KR20010029768A (en) | 2001-04-16 |
| JP3088423B1 (en) | 2000-09-18 |
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