JP4925897B2 - Election ballot - Google Patents
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- Publication number
- JP4925897B2 JP4925897B2 JP2007096157A JP2007096157A JP4925897B2 JP 4925897 B2 JP4925897 B2 JP 4925897B2 JP 2007096157 A JP2007096157 A JP 2007096157A JP 2007096157 A JP2007096157 A JP 2007096157A JP 4925897 B2 JP4925897 B2 JP 4925897B2
- Authority
- JP
- Japan
- Prior art keywords
- stretched film
- biaxially stretched
- layer
- election
- stretching
- 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.)
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Description
本発明は、国会議員や県会議員、市町村の議員および県知事、市町村長の選挙や、最高裁判所の判事の罷免選挙に用いられる選挙投票用紙に関するものである。
本発明の選挙投票用紙は、折れ回復力が良好であり、手作業や選挙専用計数機での集計作業が容易である。
The present invention relates to an election ballot used for elections for members of the Diet, prefectural assembly members, municipal assembly members, prefectural governors, and municipal mayors, as well as the election of the Supreme Court judge.
The election ballot of the present invention has a good folding resilience and is easy to perform manual work or counting work with an election counter.
選挙投票用紙としては、従来、パルプを素材とした紙に、候補者氏名の記入欄および投票に当っての注意事項および選挙管理委員会名を印刷した用紙が用いられてきた。
この用紙は、選挙民により候補者名が記入欄に書き込まれた後、２つ折りされ、投票箱内に投入される。
選挙投票終了後、投票箱より投票用紙は取り出され、選挙管理委員の立会のもとに折り曲げられた投票用紙を人々が開き、候補者名毎に投票用紙を振り分け、人手により各候補者毎の票数を数え挙げて集計してきた。
As election ballots, papers that have been printed on paper made of pulp have been printed with the name of the candidate's name, notes for voting, and the name of the board of elections.
This form is folded in half after the candidate name is written in the entry field by the electorate and put into the ballot box.
After the election ballot, the ballot is removed from the ballot box, people open the ballots folded under the election committee, and the ballots are sorted by candidate name. I have counted and counted the number of votes.
近年、選挙投票用紙として、プラスチックを素材とした合成紙を投票用紙に使用し、さらに機械による投票用紙計数機を使用することで、集計時の省力化を目指すことが可能となり、更には開票時間の短縮に大きく貢献している。（特許文献１、２参照）
しかし、合成紙を素材とした選挙用紙の場合でも、既存のものは投票直後の折り回復力が不足しており、折り方によっては折り癖がつくことがあった。そのために、一部の投票用紙は手作業により折り曲がった選挙用紙を一々開いて元の状態に戻したり、さらにひどい場合、折り癖が戻らない選挙用紙は、投票用紙計数機での計数時に、計数機の機械つまりや計数ミスを生じたりすることがあった。この様なトラブルは開票時間を増大させるものであり、大きな問題である。
In recent years, it has become possible to aim for labor saving at the time of counting by using synthetic paper made of plastic as the voting paper, and also using a voting paper counting machine with a machine as the election voting paper. It contributes greatly to shortening. (See Patent Documents 1 and 2)
However, even in the case of election papers made of synthetic paper, the existing ones lacked the ability to fold immediately after voting, and depending on how they were folded, there were cases where creases could occur. For that reason, some ballots are opened manually one by one and then returned to their original state, or even worse, election sheets that do not return folds are counted at the ballot counter. In some cases, a counting machine or a counting error was generated. Such troubles increase the counting time, and are a big problem.
本発明は、折り回復力を改良し、開票時間の短縮化に大きく貢献することができる選挙投票用紙を提供することを課題とする。 It is an object of the present invention to provide an election ballot that can improve the folding resilience and can greatly contribute to shortening the time for counting votes.
従来の合成紙としては、特許文献１、２に記載されるような、二軸延伸フィルムを基材層として、更に表裏層として基材層の両面に一軸延伸フィルムを積層した、一軸延伸フィルム／二軸延伸フィルム／一軸延伸フィルムの三層構造を有する合成紙であった。この合成紙は印刷、筆記性を良好とするための表裏層に一軸延伸フィルムを有しているが、この一軸延伸フィルムは、その延伸軸に直交する折り目をつけた場合には、既に延伸されているので更に伸ばされて非弾性変形することが少なく、即ち、曲げ弾性が高く、結果として優れた折り回復力を発揮できる。
しかしながら、一軸延伸フィルムの延伸軸に平行して折り目をつけた場合、同方向には延伸履歴がないため、力を入れれば伸ばされて可塑変形してしまい、即ち、折り癖の原因となっていた。
As a conventional synthetic paper, as described in Patent Documents 1 and 2, a biaxially stretched film is used as a base layer, and a monoaxially stretched film is laminated on both sides of the base layer as front and back layers. It was a synthetic paper having a three-layer structure of biaxially stretched film / uniaxially stretched film. This synthetic paper has a uniaxially stretched film on the front and back layers to improve printing and writing properties. This uniaxially stretched film is already stretched when a crease perpendicular to the stretched axis is made. Therefore, it is less stretched and inelastically deformed, that is, it has a high bending elasticity, and as a result, an excellent folding recovery force can be exhibited.
However, when a crease is made in parallel with the stretching axis of the uniaxially stretched film, there is no stretching history in the same direction, so that if the force is applied, it is stretched and plastically deformed, that is, it causes creases. It was.
そこで本発明者は、課題の解決に向けて鋭意検討した結果、熱可塑性樹脂からなる不透明度９０〜１００％の二軸延伸フィルムを基紙とし、この基紙の表面側と裏面側に塗工層を有し、かつ表面塗工層に被選挙人の記入欄を印刷してなる選挙投票用紙において、折り回復時間が１〜１０秒とした場合に、作業トラブルも無く、集計の作業性が大幅に改良されることを見出し、本発明を完成するに至った。
さらに、本発明では塗工層が、（ａ）水性樹脂バインダー、（ｂ）無機微細粉末、（ｃ）帯電防止機能を有する水溶性ポリマーを含有していることが好ましく、さらに（ｄ）着色剤を含有していることが好ましい。
また、本発明では二軸延伸フィルムが、熱可塑性樹脂としてポリオレフィン系樹脂を含み、かつフィラーを１１〜５６％含むことが好ましい。
Therefore, as a result of diligent investigations aimed at solving the problems, the present inventor used a biaxially stretched film made of a thermoplastic resin having an opacity of 90 to 100% as a base paper, and applied it to the front side and the back side of the base paper. If the voting recovery time is 1 to 10 seconds in the election ballot paper that has a layer and the entry column of the elector is printed on the surface coating layer, there is no work trouble and the workability of counting The inventors have found that the present invention is greatly improved and have completed the present invention.
Furthermore, in the present invention, the coating layer preferably contains (a) an aqueous resin binder, (b) an inorganic fine powder, (c) a water-soluble polymer having an antistatic function, and (d) a colorant. It is preferable to contain.
Moreover, in this invention, it is preferable that a biaxially stretched film contains polyolefin resin as a thermoplastic resin, and contains 11-56% of fillers.
加えて本発明では、二軸延伸フィルムは、その面積延伸倍率が２５〜７０倍であり、下記式（１）で算出される空孔率が１５〜６０％であることが好ましい。
本発明の選挙投票用紙は、二軸延伸フィルムを基紙に用いることで、折り方向の如何に問わず優れた折り回復力を発揮し、開票作業、集計作業におけるトラブルも少なく、開票時間の短縮化に大きく貢献できる。 The election ballot of the present invention uses a biaxially stretched film as the base paper, so that it exhibits excellent folding resilience regardless of the folding direction, there are few troubles in the counting and counting operations, and the counting time is shortened. Can greatly contribute to the development.
以下に、本発明の選挙投票用紙の構成及び効果を詳細に説明する。なお、本発明において用いられる「〜」はその前後に記載される数値をそれぞれ最小値及び最大値として含む範囲を意味する。
二軸延伸フィルム
本発明における二軸延伸フィルムとは、本発明の選挙投票用紙の基紙となるものである。
特徴としては熱可塑性樹脂を含み、好ましくはフィラーを含み、異なる二軸方向に延伸された延伸フィルムであり、不透明度が９０〜１００％、好ましくは９３〜９８％の範囲であって、面積延伸倍率が２５〜７０倍であることが好ましく、空孔率が１５〜６０％であることが好ましく、後述する折り回復時間が１〜１０秒の範囲となる折り回復力を有するものである。
Below, the structure and effect of the election ballot of this invention are demonstrated in detail. In addition, "-" used in this invention means the range which includes the numerical value described before and behind that as a minimum value and a maximum value, respectively.
Biaxially stretched film The biaxially stretched film in the present invention is a base paper for the election ballot of the present invention.
It is a stretched film that includes a thermoplastic resin, preferably a filler, and is stretched in different biaxial directions, and has an opacity range of 90 to 100%, preferably 93 to 98%, and is stretched in the area. The magnification is preferably 25 to 70 times, the porosity is preferably 15 to 60%, and has a folding recovery force that makes the folding recovery time described later in the range of 1 to 10 seconds.
本発明の二軸延伸フィルムは、複層構造であっても二軸延伸フィルムのみを含むものである。全体が二軸方向に既に延伸されているため、例え投票者がどちらに折り目をつけても伸びにくく、両方向に曲げ弾性が高いために折り癖が付きにくいという特徴を有する。また、空孔含有率（空孔率）を従来品に比べて高めに設定することができ有利である。
更にこれら延伸倍率や空孔率から、後述する折り回復時間が１〜１０秒の範囲となるように調整することで、本発明の目的とする折り回復力（折り回復時間）が得られたものである。
The biaxially stretched film of the present invention includes only a biaxially stretched film even if it has a multilayer structure. Since the whole has already been stretched in the biaxial direction, it is difficult for the voter to stretch regardless of which crease is made, and because it has high bending elasticity in both directions, it is difficult to bend. Further, it is advantageous that the void content (porosity) can be set higher than that of the conventional product.
Furthermore, the folding recovery force (folding recovery time) that is the object of the present invention was obtained by adjusting the stretching ratio and the porosity so that the folding recovery time described later is in the range of 1 to 10 seconds. It is.
１）熱可塑性樹脂
本発明の二軸延伸フィルムに用いられる熱可塑性樹脂は、二軸延伸フィルムのマトリクスを形成するものであり、その種類は特に制限されない。例えば、高密度ポリエチレン、中密度ポリエチレン等のエチレン系樹脂、あるいはポリプロピレン等のプロピレン系樹脂、ポリ（４−メチルペンタ−１−エン）、エチレン−環状オレフィン共重合体等のシクロオレフィンコポリマー、等のオレフィン系樹脂；ナイロン−６、ナイロン−６，６、ナイロン−６，１０、ナイロン−６，１２等のポリアミド系樹脂；ポリエチレンテレフタレートやその共重合体、ポリエチレンナフタレート、ポリブチレンテレフタレート、脂肪族ポリエステル等の熱可塑性ポリエステル系樹脂；アタクティックポリスチレン、シンジオタクティックポリスチレン、スチレン−アクリロニトリルプラスチック、アクリロニトリル−ブタジエン−スチレンプラスチック等のスチレン系樹脂；ポリカーボネート、ポリフェニレンスルフィド等の延伸成形が可能な熱可塑性樹脂が挙げられる。これらは２種以上混合して用いることもできる。
本発明では一般に曲げ弾性の高いポリメチルペンテン、ナイロン、ポリブチレンテレフタレート、ＡＢＳ、ポリカーボネート等を選択しても良いが、本発明では熱可塑性樹脂として、生産性、加工容易性、耐水性、耐薬品性、リサイクル性、コストの面からオレフィン系樹脂を用いることが好ましい。更にオレフィン系樹脂の中でも、プロピレン系樹脂、高密度ポリエチレンを用いることが好ましく、プロピレン系樹脂を用いることが特に好ましい。
1) Thermoplastic resin The thermoplastic resin used in the biaxially stretched film of the present invention forms a matrix of the biaxially stretched film, and the type thereof is not particularly limited. For example, ethylene resins such as high density polyethylene and medium density polyethylene, or olefins such as propylene resins such as polypropylene, cycloolefin copolymers such as poly (4-methylpent-1-ene) and ethylene-cyclic olefin copolymers, etc. -Based resins; polyamide resins such as nylon-6, nylon-6,6, nylon-6,10, nylon-6,12; polyethylene terephthalate and copolymers thereof, polyethylene naphthalate, polybutylene terephthalate, aliphatic polyester, etc. Thermoplastic polyester resins such as: atactic polystyrene, syndiotactic polystyrene, styrene-acrylonitrile plastics, acrylonitrile-butadiene-styrene plastics, etc .; polycarbonates, poly Stretch forming such Nirensurufido are mentioned thermoplastic resin as possible. These may be used in combination of two or more.
In the present invention, polymethylpentene, nylon, polybutylene terephthalate, ABS, polycarbonate, etc., which are generally high in flexural elasticity, may be selected. However, in the present invention, productivity, ease of processing, water resistance, chemical resistance are used as the thermoplastic resin. It is preferable to use an olefin resin from the standpoints of performance, recyclability, and cost. Further, among olefin resins, it is preferable to use propylene resin and high density polyethylene, and it is particularly preferable to use propylene resin.
かかるプロピレン系樹脂としては、プロピレン単独重合体でありアイソタクティックないしはシンジオタクティックおよび種々の立体規則性を示すポリプロピレンや、プロピレンを主成分とし、これとエチレン、ブテン−１、ヘキセン−１、ヘプテン−１，４−メチルペンテン−１等のα−オレフィンとの共重合体が使用できる。この共重合体は、２元系でも３元系でも４元系でもよく、またランダム共重合体でもブロック共重合体でもよい。またプロピレン系樹脂を用いる場合は、延伸性を良好とするためポリエチレン、ポリスチレン、エチレン・酢酸ビニル共重合体等のプロピレン系樹脂よりも融点が低い熱可塑性樹脂を３〜２５重量％配合するのがよい。このような熱可塑性樹脂は、二軸延伸フィルム中に、４４〜８９重量％で使用することがより好ましく、５０〜８６重量％で使用することがさらに好ましい。
二軸延伸フィルムにおける熱可塑性樹脂の含有量が４４重量％未満であれば、基紙としての強度が不足し、また延伸成形時に破断しやすい傾向がある。逆に８９重量％を超えては充分な空孔数が得られない傾向がある。
Examples of such propylene-based resins include propylene homopolymers such as isotactic or syndiotactic and polypropylene having various stereoregularities, propylene as a main component, and ethylene, butene-1, hexene-1, heptene. Copolymers with α-olefins such as -1,4-methylpentene-1 can be used. This copolymer may be a binary, ternary or quaternary system, and may be a random copolymer or a block copolymer. When a propylene resin is used, 3 to 25% by weight of a thermoplastic resin having a melting point lower than that of the propylene resin such as polyethylene, polystyrene, and ethylene / vinyl acetate copolymer is blended in order to improve stretchability. Good. Such a thermoplastic resin is more preferably used at 44 to 89% by weight in the biaxially stretched film, and more preferably at 50 to 86% by weight.
If the content of the thermoplastic resin in the biaxially stretched film is less than 44% by weight, the strength as a base paper is insufficient, and there is a tendency that the film tends to break during stretch molding. Conversely, if it exceeds 89% by weight, there is a tendency that a sufficient number of pores cannot be obtained.
２）フィラー
本発明の二軸延伸フィルムに熱可塑性樹脂とともに用いることができるフィラーとしては、各種無機フィラーまたは有機フィラーを使用することができる。無機フィラーまたは有機フィラーは、二軸延伸フィルム中に、１１〜５６重量％で使用することがより好ましく、１４〜５０重量％で使用することがさらに好ましい。
無機フィラーとしては、炭酸カルシウム、焼成クレイ、シリカ、けいそう土、タルク、硫酸バリウム、硫酸アルミニウム、酸化マグネシウム、アルミナ、紫外光吸収フィラー等が挙げられ、紫外光吸収フィラーとしては、二酸化チタン、酸化亜鉛等が挙げられる。
有機フィラーとしては、マトリクス樹脂がポリオレフィン樹脂の場合に、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリカーボネート、ナイロン−６、ナイロン−６，６、環状オレフィン重合体、環状オレフィンとエチレンとの共重合体等の用いるポリオレフィン樹脂の融点よりは高い融点（例えば、１２０〜３００℃）ないしはガラス転移温度（例えば、１２０〜２８０℃）を有するものが使用できる。
二軸延伸フィルムには、上記の無機フィラーまたは有機フィラーの中から１種を選択してこれを単独で使用してもよいし、２種以上を選択して組み合わせて使用してもよい。２種以上を組み合わせて使用する場合には、有機フィラーと無機フィラーとを混合して使用してもよい。
2) Filler As the filler that can be used together with the thermoplastic resin in the biaxially stretched film of the present invention, various inorganic fillers or organic fillers can be used. The inorganic filler or the organic filler is more preferably used at 11 to 56% by weight, and more preferably 14 to 50% by weight in the biaxially stretched film.
Examples of inorganic fillers include calcium carbonate, calcined clay, silica, diatomaceous earth, talc, barium sulfate, aluminum sulfate, magnesium oxide, alumina, ultraviolet light absorbing fillers, and ultraviolet light absorbing fillers include titanium dioxide, oxidized Zinc etc. are mentioned.
As the organic filler, when the matrix resin is a polyolefin resin, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon-6, nylon-6,6, cyclic olefin polymer, copolymer of cyclic olefin and ethylene, etc. are used. What has melting | fusing point (for example, 120-300 degreeC) higher than melting | fusing point of polyolefin resin or glass transition temperature (for example, 120-280 degreeC) can be used.
For the biaxially stretched film, one kind selected from the above inorganic fillers or organic fillers may be used alone, or two or more kinds may be selected and used in combination. When using combining 2 or more types, you may mix and use an organic filler and an inorganic filler.
本発明に所望の折り適性を持たせるためには、二軸延伸フィルム中に均一で真円に近い微細な空孔を多量に発生させることが好ましい。後述する延伸成形により発生させる空孔の形状の調整のため、二軸延伸フィルムに含み得る無機フィラーの形状または有機フィラーの分散形状は、アスペクト比（長径／短径）が１〜３程度の粒形を有していることが好ましい。また空孔サイズの調整のため、二軸延伸フィルムに含み得る無機フィラーの平均粒径または有機フィラーの平均分散粒径は、好ましくはそれぞれが０．１μｍ以上３．０μｍ未満の範囲、より好ましくはそれぞれが０．２〜２．０μｍの範囲のものを使用する。平均粒径または平均分散粒径が３．０μｍ以上の場合には、空孔が不均一になる傾向がある。また、平均粒径または平均分散粒径が０．１μｍ未満の場合には、所定の空孔が得られにくい傾向がある。
これらフィラーの平均粒径または平均分散粒径は、電子顕微鏡により観察された一次粒子または分散粒子１０点の粒径を求め、その平均値として求めることができる。
In order to give the present invention a desired folding property, it is preferable to generate a large amount of uniform fine pores close to a perfect circle in the biaxially stretched film. In order to adjust the shape of the pores generated by stretching, which will be described later, the shape of the inorganic filler that can be included in the biaxially stretched film or the dispersed shape of the organic filler is a particle having an aspect ratio (major axis / minor axis) of about 1 to 3 It preferably has a shape. In order to adjust the pore size, the average particle size of the inorganic filler or the average dispersed particle size of the organic filler that can be included in the biaxially stretched film is preferably in the range of 0.1 μm or more and less than 3.0 μm, more preferably Each uses a thing of the range of 0.2-2.0 micrometers. When the average particle size or the average dispersed particle size is 3.0 μm or more, the pores tend to be non-uniform. Further, when the average particle diameter or the average dispersed particle diameter is less than 0.1 μm, there is a tendency that predetermined pores are hardly obtained.
The average particle size or average dispersed particle size of these fillers can be obtained as an average value obtained by determining the particle size of 10 primary particles or dispersed particles observed with an electron microscope.
３）添加剤
本発明の二軸延伸フィルムには、必要により、蛍光増白剤、熱安定剤、酸化防止剤、紫外線安定剤（光安定剤）、紫外線吸収剤、染料、顔料、分散剤、滑剤、帯電防止剤、粘着防止剤、ブロッキング防止剤、難燃剤などの各種公知の添加剤を配合してもよい。熱安定剤としては、立体障害フェノール系やリン系、アミン系等の安定剤を０．００１〜１重量％、光安定剤としては、立体障害アミン系やベンゾトリアゾール系、ベンゾフェノン系などの光安定剤を０．００１〜１重量％、無機フィラーの分散剤としては、シランカップリング剤、オレイン酸やステアリン酸等の高級脂肪酸、金属石鹸、ポリアクリル酸、ポリメタクリル酸ないしはそれらの塩等を０．０１〜４重量％、帯電防止剤としては、ステアリン酸モノグリセリド、ステアリルジエタノールアミン等の低分子型界面活性剤を０．０１〜４重量％配合してもよい。
3) Additives In the biaxially stretched film of the present invention, if necessary, an optical brightener, a heat stabilizer, an antioxidant, an ultraviolet stabilizer (light stabilizer), an ultraviolet absorber, a dye, a pigment, a dispersant, Various known additives such as a lubricant, an antistatic agent, an anti-tacking agent, an anti-blocking agent and a flame retardant may be blended. As heat stabilizer, 0.001 to 1% by weight of sterically hindered phenol, phosphorus, amine, etc. stabilizer, and as light stabilizer, sterically hindered amine, benzotriazole, benzophenone, etc. 0.001 to 1% by weight of the agent, and as the dispersant for the inorganic filler, silane coupling agents, higher fatty acids such as oleic acid and stearic acid, metal soap, polyacrylic acid, polymethacrylic acid or their salts are 0 0.01 to 4% by weight, and as an antistatic agent, 0.01 to 4% by weight of a low molecular weight surfactant such as stearic acid monoglyceride or stearyl diethanolamine may be added.
４）積層方法
本発明で用いる二軸延伸フィルムは、単層構造でも良いし、２層以上に積層された複層構造でも良い。折り回復力の調整が容易になることから、複層構造であることが好ましい。
積層例として、例えばベース層の片面に表面層を積層した２層構造、ベース層の両面に表面層、裏面層をそれぞれ形成した３層構造を例示することができる。
さらには表面層とベース層の間に中間層を積層することで４層以上の多層構造とすることもできる。従って二軸延伸フィルムが、例えば３層構造の場合は、表面層／ベース層／裏面層、５層構造の場合は、表面層／中間層／ベース層／中間層／裏面層、の積層構造を例示できる。
4) Lamination method The biaxially stretched film used in the present invention may have a single layer structure or a multilayer structure in which two or more layers are laminated. Since the folding recovery force can be easily adjusted, a multilayer structure is preferable.
Examples of the lamination include a two-layer structure in which a surface layer is laminated on one side of the base layer, and a three-layer structure in which a surface layer and a back layer are formed on both sides of the base layer.
Furthermore, a multilayer structure having four or more layers can be formed by laminating an intermediate layer between the surface layer and the base layer. Therefore, for example, when the biaxially stretched film has a three-layer structure, the surface layer / base layer / back layer, and in the case of a five-layer structure, the laminated structure of surface layer / intermediate layer / base layer / intermediate layer / back layer is formed. It can be illustrated.
積層方法に関しては特に限定されず、公知の積層方法、例えば複数の押出機により溶融した樹脂を、フィードブロックまたはマルチマニホールドにより一台のダイに導きダイ内で積層する方法（共押出）、溶融押出ラミネートにより積層する方法（溶融ラミ）等が挙がられる。
二軸延伸フィルムが、表面層、ベース層、裏面層を含む積層フィルムである場合には、折り回復力を所望の範囲に調整しやすくするために、ベース層のフィラー含有量を１５〜６０％、表面層および裏面層のフィラー含有量を０〜１５％の範囲に設定することが好ましい。
The lamination method is not particularly limited, and a known lamination method, for example, a method in which a resin melted by a plurality of extruders is led to a single die by a feed block or a multi-manifold (coextrusion), melt extrusion. A method of laminating by lamination (melting laminating) and the like are listed.
When the biaxially stretched film is a laminated film including a surface layer, a base layer, and a back layer, the filler content of the base layer is 15 to 60% in order to easily adjust the fold recovery force to a desired range. It is preferable to set the filler content of the front surface layer and the back surface layer in the range of 0 to 15%.
５）延伸方法
本発明で用いる二軸延伸フィルムの延伸成形方法としては、一般的な二軸延伸方法が使用できる。具体例としてはスクリュー型押出機に接続されたＴダイやＩダイを使用して溶融樹脂をシート状に押し出し成形した後、該シートを、ロール群の周速差を利用した縦延伸とテンターオーブンを利用した横延伸とを組み合わせた逐次二軸延伸にて延伸する方法や、テンターオーブンとリニアモーターの組み合わせによる同時二軸延伸にて延伸する方法、該シートをカットしパンタグラフ型延伸装置を用いて同時二軸延伸する方法などが挙げられる。
延伸温度は使用する熱可塑性樹脂の融点より２〜６０℃低い温度であり、樹脂がプロピレン単独重合体（融点１５５〜１６７℃）のときは１５２〜１６４℃、高密度ポリエチレン（融点１２１〜１３４℃）のときは１１０〜１２０℃が好ましい。また、延伸速度は２０〜３５０ｍ／分が好ましい。
5) Stretching method As a stretching method for the biaxially stretched film used in the present invention, a general biaxial stretching method can be used. As a specific example, a T-die or I-die connected to a screw-type extruder is used to extrude a molten resin into a sheet shape, and then the sheet is longitudinally stretched using a difference in peripheral speed between rolls and a tenter oven. A method of stretching by sequential biaxial stretching in combination with transverse stretching using a method, a method of stretching by simultaneous biaxial stretching by a combination of a tenter oven and a linear motor, and using a pantograph type stretching device by cutting the sheet Examples thereof include a method of simultaneous biaxial stretching.
The stretching temperature is 2 to 60 ° C. lower than the melting point of the thermoplastic resin to be used. When the resin is a propylene homopolymer (melting point 155 to 167 ° C.), 152 to 164 ° C., high density polyethylene (melting point 121 to 134 ° C. ) Is preferably 110 to 120 ° C. The stretching speed is preferably 20 to 350 m / min.
二軸延伸フィルム中に発生させる空孔の大きさを調整するために、面積延伸倍率（縦方向延伸倍率と横方向延伸倍率との積）は２５〜７０倍の範囲とするのが好ましく、２８〜６０倍の範囲とすることがより好ましい。使用する熱可塑性樹脂がプロピレン系樹脂の場合には、面積延伸倍率が２５倍未満では、延伸ムラが発生し均一な二軸延伸フィルムが得られにくく、面積延伸倍率が７０倍を上回る場合は、延伸時にフィルムが破断しやすいために好ましくない。
本発明の二軸延伸フィルムの各延伸軸における延伸倍率は、ほぼ等しいことが好ましい。例えば二軸延伸フィルムの縦方向延伸倍率を横方向延伸倍率で除した値が、０．２〜５の範囲であることが好ましく、０．４〜３の範囲であることがより好ましく、０．５〜２の範囲であることが特に好ましい。二軸延伸フィルムが縦方向、横方向ともほぼ等しい延伸履歴を有することで、用紙の目方向や折り方向に寄らず、優れた折り回復力を発揮できる。使用する熱可塑性樹脂がプロピレン系樹脂の場合、各軸における延伸倍率は、具体的にはそれぞれ２〜１１倍の範囲が好ましく、４〜１０倍の範囲がより好ましく、５〜９倍の範囲が特に好ましい。各軸における延伸倍率が２倍未満では、延伸ムラが発生し均一な延伸フィルムが得られにくく、各軸における延伸倍率が１１倍を上回る場合は、延伸時にフィルムが破断しやすいために好ましくない。
In order to adjust the size of the pores generated in the biaxially stretched film, the area stretch ratio (the product of the longitudinal stretch ratio and the transverse stretch ratio) is preferably in the range of 25 to 70 times, 28 It is more preferable that the range be ˜60 times. When the thermoplastic resin to be used is a propylene-based resin, if the area stretch ratio is less than 25 times, stretching unevenness occurs and it is difficult to obtain a uniform biaxially stretched film, and when the area stretch ratio exceeds 70 times, This is not preferable because the film is easily broken during stretching.
It is preferable that the draw ratio in each stretch axis of the biaxially stretched film of the present invention is substantially equal. For example, the value obtained by dividing the longitudinal stretching ratio of the biaxially stretched film by the lateral stretching ratio is preferably in the range of 0.2 to 5, more preferably in the range of 0.4 to 3, A range of 5 to 2 is particularly preferable. Since the biaxially stretched film has substantially the same stretching history in both the machine direction and the transverse direction, excellent folding recovery force can be exhibited without depending on the paper eye direction or the folding direction. When the thermoplastic resin used is a propylene-based resin, the draw ratio in each axis is specifically preferably in the range of 2 to 11 times, more preferably in the range of 4 to 10 times, and in the range of 5 to 9 times. Particularly preferred. If the draw ratio in each axis is less than 2 times, uneven stretching occurs and it is difficult to obtain a uniform stretched film. If the draw ratio in each axis is more than 11 times, the film tends to break during stretching, which is not preferable.
本発明の二軸延伸フィルムの面積延伸倍率は、設計上あるべき値として設けているが、下記の分析方法によって求めることも可能である。
例えば、二軸延伸フィルムのカットサンプルを、使用する熱可塑性樹脂の融点（例えば、ＤＳＣ測定により求めた融点）より２〜５℃低い温度に設定したオイルバス（例えば、シリコーンオイルバス）中に浸漬、静置して、延伸による配向がすべて緩和する様に熱収縮させて延伸前の状態とし、縦・横各方向の熱収縮率より算出することができる。
また、二軸延伸フィルムがフィラーを含有し、延伸により内部に空孔を有するものである場合は、縦・横各方向の断面を電子顕微鏡で観察し、任意の空孔１０点のアスペクト比（長径／短径）の平均値を求めて、縦・横各方向での平均値の積を面積延伸倍率としても良い。
フィルムが二軸延伸フィルムであるかどうか、またどの方向に延伸軸があるかを定性的に判断する方法としては、熱可塑性樹脂が結晶性ポリマーの場合、延伸により分子鎖の配向と同時に結晶化を伴うため、結晶部のＸ線回折を利用した解析方法を利用できる。例えばフィルムを小片に切り出し、Ｘ線の入射方向を変えながら数枚の回折パターン写真を撮影して、フィルム中の熱可塑性樹脂の結晶配向度を確認すれば良い。
本発明の二軸延伸フィルムは上記４）の積層方法と、５）の延伸方法を組み合わせた成形方法により製造することができる。
Although the area stretch ratio of the biaxially stretched film of the present invention is provided as a value that should be in design, it can also be determined by the following analysis method.
For example, a cut sample of a biaxially stretched film is immersed in an oil bath (for example, a silicone oil bath) set at a temperature 2 to 5 ° C. lower than the melting point of the thermoplastic resin used (for example, the melting point determined by DSC measurement). It can be calculated by the heat shrinkage rate in each of the longitudinal and transverse directions by allowing it to stand and causing heat shrinkage so that all the orientation by stretching is relaxed.
In addition, when the biaxially stretched film contains a filler and has pores inside by stretching, the cross section in each of the vertical and horizontal directions is observed with an electron microscope, and an aspect ratio of 10 arbitrary pores ( The average value of the major axis / minor axis) is obtained, and the product of the average values in the longitudinal and transverse directions may be used as the area stretch ratio.
As a method of qualitatively judging whether or not the film is a biaxially stretched film and in which direction the stretch axis is, if the thermoplastic resin is a crystalline polymer, it will be crystallized simultaneously with the orientation of the molecular chain by stretching. Therefore, an analysis method using X-ray diffraction of the crystal part can be used. For example, the film may be cut into small pieces, and several diffraction pattern photographs may be taken while changing the X-ray incident direction to confirm the crystal orientation of the thermoplastic resin in the film.
The biaxially stretched film of the present invention can be produced by a molding method in which the laminating method 4) and the stretching method 5) are combined.
６）物性
本発明の二軸延伸樹脂フィルムは、折り回復性を改良するために、後述する試験方法により求める折り回復時間が１〜１０秒の間にあることが必要である。１〜８秒の間であることがより好ましい。１０秒を上回る場合は、折り回復性が不十分であり好ましくなく、１秒未満の場合は、フィルム剛度が高すぎてしまい、投票時に折り曲げることが困難となるため好ましくない。
また本発明の二軸延伸樹脂フィルムは上記の折り回復性を発現する一要因として、該フィルム中に含まれる空孔の存在が挙げられる。二軸延伸フィルムの空孔率は好ましくは１５〜６０％、より好ましくは２０〜５５％の範囲とする。本明細書において「空孔率」とは、延伸前の樹脂組成物に延伸後どの程度の空孔が生じたかを示すものであり、次の式（１）にしたがって計算される値を意味する。
In addition, the biaxially stretched resin film of the present invention includes the presence of pores contained in the film as one factor that exhibits the above fold recovery properties. The porosity of the biaxially stretched film is preferably 15 to 60%, more preferably 20 to 55%. In the present specification, the “porosity” indicates how many voids are formed after stretching in the resin composition before stretching, and means a value calculated according to the following formula (1). .
本発明の二軸延伸フィルムの厚さは、取り扱いやすさの観点から、好ましくは６０〜１３０μｍ、より好ましくは７０〜１２０μｍ、特に好ましくは８０〜１１０μｍの範囲である。
本発明の二軸延伸フィルムの不透明度は、記入された候補者氏名が透けて見えることを防止するため、９０〜１００％であり、好ましくは９２〜９８％の範囲である。
この二軸延伸フィルムの表裏の表面は、塗工層との接着性を良好とするためにコロナ放電処理されていてもよいし、更にプライマー処理されていてもよい。
The thickness of the biaxially stretched film of the present invention is preferably in the range of 60 to 130 μm, more preferably 70 to 120 μm, and particularly preferably 80 to 110 μm from the viewpoint of ease of handling.
The opacity of the biaxially stretched film of the present invention is 90 to 100%, preferably 92 to 98% in order to prevent the entered candidate name from being seen through.
The front and back surfaces of this biaxially stretched film may be subjected to corona discharge treatment or primer treatment in order to improve the adhesion to the coating layer.
塗工層
二軸延伸フィルムの表裏面に塗工層を形成するために、塗工される塗工剤は、（ａ）水性樹脂バインダー、（ｂ）無機微細粉末、（ｃ）帯電防止機能を有する水溶性ポリマーを含有することが好ましく、さらに塗工剤は（ｄ）着色剤を含有しても良い。
塗工剤は（ａ）水性樹脂バインダー中の樹脂固型分１００重量部に対し、（ｂ）無機微細粉末は３００〜２，０００重量部、好ましくは５００〜７００重量部の割合で、（ｃ）帯電防止機能を有する水溶性ポリマーは０．１〜５重量部の割合で配合したものが好ましく用いられる。
In order to form the coating layer on the front and back surfaces of the coating layer biaxially stretched film, the coating agent to be coated has (a) an aqueous resin binder, (b) an inorganic fine powder, and (c) an antistatic function. It is preferable to contain the water-soluble polymer which has, and also a coating agent may contain (d) a coloring agent.
The coating agent is (a) 100 parts by weight of the solid resin in the aqueous resin binder, and (b) the inorganic fine powder is 300 to 2,000 parts by weight, preferably 500 to 700 parts by weight. The water-soluble polymer having an antistatic function is preferably used in a proportion of 0.1 to 5 parts by weight.
（ａ）水性樹脂バインダーは、有機バインダーとして（ｂ）無機微細粉末や（ｃ）水溶性ポリマーの固着、および塗工層の二軸延伸フィルムへの密着力を付与するものである。本発明に使用し得る（ａ）水性樹脂バインダーは、基紙である二軸延伸フィルムの素材の熱可塑性樹脂の種類及びその他の条件を考慮して任意に選択すればよいが、例えば、メタクリル酸メチル−ブタジエン共重合体ゴムラテックス、ポリ塩化ビニリデン系エマルジョン、エチレン−酢酸ビニル−塩化ビニル共重合体エマルジョン、スチレン−ブタジエン共重合体ゴムラテックス、酢酸ビニル−アクリル酸エステル共重合体ラテックス、アクリル酸エステル−スチレン共重合体エマルジョン、エチレン−酢酸ビニル共重合体エマルジョン、アクリル系樹脂エマルジョン等を単独で、または二種以上を併用して用いることができる。 The (a) aqueous resin binder imparts adhesion of (b) inorganic fine powder and (c) water-soluble polymer as an organic binder and adhesion of the coating layer to the biaxially stretched film. The (a) aqueous resin binder that can be used in the present invention may be arbitrarily selected in consideration of the type of thermoplastic resin as the raw material of the biaxially stretched film as the base paper and other conditions. For example, methacrylic acid Methyl-butadiene copolymer rubber latex, polyvinylidene chloride emulsion, ethylene-vinyl acetate-vinyl chloride copolymer emulsion, styrene-butadiene copolymer rubber latex, vinyl acetate-acrylate copolymer latex, acrylate ester -A styrene copolymer emulsion, an ethylene-vinyl acetate copolymer emulsion, an acrylic resin emulsion or the like can be used alone or in combination of two or more.
次に、（ｂ）無機微細粉末は充填材や顔料として用いられ、印刷性の向上、鉛筆筆記性の向上、白度の向上、着色、不透明感付与、表面平滑性向上、及び（充填材として）コスト低減を目的としている。
（ｂ）成分の無機微細粉末としては、炭酸カルシウム、サチンホワイト、シリカ、酸化チタン、アルミナ、亜鉛華、酸化鉄、クレイ及び硫酸アルミニウム等が挙げられるが、特に炭酸カルシウム等の充填材類及び酸化チタン、亜鉛華、酸化鉄などの顔料類が好ましい。
また、この無機微細粉末の粒径は１５μｍ以下が好ましく、特に０．１〜１０μｍが好ましい。用いる無機微細粉末の粒径が１５μｍを超えては、得られる選挙投票用紙の表面が粗面となり、その平滑性が悪くなるからである。
Next, (b) the inorganic fine powder is used as a filler or pigment, improving printability, improving pencil writing, improving whiteness, coloring, imparting opacity, improving surface smoothness, and (as filler ) The purpose is to reduce costs.
Examples of the inorganic fine powder of component (b) include calcium carbonate, satin white, silica, titanium oxide, alumina, zinc white, iron oxide, clay, and aluminum sulfate. Particularly, fillers such as calcium carbonate and oxidation Pigments such as titanium, zinc white and iron oxide are preferred.
Moreover, the particle size of the inorganic fine powder is preferably 15 μm or less, and particularly preferably 0.1 to 10 μm. This is because if the particle size of the inorganic fine powder to be used exceeds 15 μm, the surface of the election ballot obtained will be rough and the smoothness will deteriorate.
更に、（ｃ）成分の帯電防止機能を有する水溶性ポリマーとしては、ポリエチレンイミン、ポリ（エチレンイミン−尿素）、ポリアミンポリアミドのエチレンイミン付加物、窒素原子含有水溶性カチオン性ポリマーもしくは両性ポリマー等が挙げられる。この窒素原子含有水溶性ポリマーは、窒素原子含有単量体を単独重合するか、これら単量体と他の共重合性単量体を共重合することにより得られる。
含窒素単量体の具体例としては、たとえば下記化学式で示される（イ）乃至（リ）で表される単量体のようなものが挙げられる。
Specific examples of the nitrogen-containing monomer include monomers represented by the following chemical formulas (A) to (L).
この窒素原子含有水溶性ポリマーは、これら四級（両性化）窒素含有単量体（ロ）、（ニ）、（ニ）′、（ヘ）、（ヘ）′、（チ）、（チ）′、（リ）を単独重合して、またはこれら四級窒素含有単量体と他のビニル単量体とを共重合させることにより得られる。あるいは、三級窒素含有単量体（イ）、（ハ）、（ホ）、（ト）を単独重合、もしくは他の単量体と共重合させてからアルキルハライド、ジメチル硫酸、ベンジルハライドモノクロロ酢酸エステル等のカチオン化剤により四級化、又はモノクロル酢酸（塩）、プロパンサルトン、プロピオラクトン等の両性化剤により両性化することによって四級化ないし両性化して得ることができる。
この窒素原子含有水溶性ポリマーは水溶性であることが好ましいが、塗膜の耐水性の観点から過度に水溶性であることは望ましくない。従ってこの三級ないし四級窒素含有重合体は、疎水性の単量体との共重合体であることが望ましい。疎水性単量体としては、スチレンまたはその核ないし側鎖置換体（メチルスチレン等）、塩化ビニル、長鎖アルキル基等を有するアクリル酸エステルないしメタクリル酸エステル、ハロゲン化ビニル、その他が挙げられる。
This nitrogen atom-containing water-soluble polymer is composed of these quaternary (amphoteric) nitrogen-containing monomers (b), (d), (d) ', (f), (f)', (h), (h) It can be obtained by homopolymerizing ', (ri) or by copolymerizing these quaternary nitrogen-containing monomers with other vinyl monomers. Alternatively, the tertiary nitrogen-containing monomers (i), (c), (e), (g) are homopolymerized or copolymerized with other monomers before alkyl halide, dimethyl sulfate, benzyl halide monochloroacetic acid It can be obtained by quaternization or amphotericization by quaternization with a cationizing agent such as ester or amphotericizing with an amphoteric agent such as monochloroacetic acid (salt), propane sultone, propiolactone or the like.
The nitrogen atom-containing water-soluble polymer is preferably water-soluble, but it is not desirable to be excessively water-soluble from the viewpoint of water resistance of the coating film. Therefore, the tertiary or quaternary nitrogen-containing polymer is desirably a copolymer with a hydrophobic monomer. Examples of the hydrophobic monomer include styrene or a nucleus or a side chain substituent thereof (such as methylstyrene), vinyl chloride, acrylic acid ester or methacrylic acid ester having a long chain alkyl group, vinyl halide, and the like.
本発明で特に好ましい（ｃ）成分の帯電防止機能を有する水溶性ポリマー（窒素原子含有水溶性ポリマー）は下記の（ａ）′〜（ｃ）′成分を共重合させたアクリル系ポリマーである。
（ａ）′単量体（イ）〜（ヘ） ２０〜４０重量％
（ｂ）′
〔式中、Ｒ1はＨまたはメチル基、Ｒ2は炭素数１〜１８のアルキル基である〕
（ｃ）′疎水性ビニル単量体 ０〜２０重量％
The water-soluble polymer (nitrogen atom-containing water-soluble polymer) having an antistatic function as the component (c) particularly preferred in the present invention is an acrylic polymer obtained by copolymerizing the following components (a) ′ to (c) ′.
(A) ′ Monomers (a) to (f) 20 to 40% by weight
(B) ′
[Wherein R 1 is H or a methyl group, and R 2 is an alkyl group having 1 to 18 carbon atoms]
(C) ′ Hydrophobic vinyl monomer 0 to 20% by weight
然して、上記（ｂ）′成分としては、アクリル酸メチル、アクリル酸ブチル、アクリル酸プロピル、アクリル酸ステアリル、メタクリル酸メチル、メタクリル酸エチル等が挙げられる。
本発明で最も好適なアクリル系ポリマーは、（ａ）′単量体が前記の単量体（ヘ）であり、Ｘ- がＣｌ- であるものである。
これらアクリル系ポリマーは、三菱化学（株）よりサフトマーＳＴ１０００、ＳＴ１１００の商品名で販売されている。
これら（ａ）、（ｂ）および（ｃ）成分の他に、投票表紙を着色する必要がある場合は、塗工層中に（ｄ）成分として着色剤を添加しても良い。着色剤としては、市販の染料及び／又は顔料を選択することが可能である。染料としてはその種類に制限はなく、例えば塩基性染料、酸性染料、直接染料、蛍光染料、分散染料、反応性染料等が用いられる。顔料もその種類に制限はなく、金属の酸化物あるいは硫化物を主成分とする無機顔料や、通常レーキと言われている溶解した染料に沈殿剤を加えて不溶性にした有機顔料等が広く使用できる。
However, examples of the component (b) ′ include methyl acrylate, butyl acrylate, propyl acrylate, stearyl acrylate, methyl methacrylate, and ethyl methacrylate.
The most preferred acrylic polymer in the present invention is one in which (a) ′ monomer is the monomer (f) and X − is Cl − .
These acrylic polymers are sold under the trade names of SAFTMER ST1000 and ST1100 from Mitsubishi Chemical Corporation.
In addition to these components (a), (b) and (c), when it is necessary to color the voting cover, a colorant may be added as a component (d) in the coating layer. Commercially available dyes and / or pigments can be selected as the colorant. There is no restriction | limiting in the kind as dye, For example, a basic dye, an acid dye, a direct dye, a fluorescent dye, a disperse dye, a reactive dye etc. are used. There are no restrictions on the types of pigments, and inorganic pigments mainly composed of metal oxides or sulfides, and organic pigments made insoluble by adding a precipitating agent to dissolved dyes, usually called lakes, are widely used. it can.
具体的な無機顔料としては、チタンホワイト（二酸化チタン）、亜鉛華（酸化亜鉛）、炭酸カルシウム、カオリン、黒鉛（カーボンブラック）、群青（ウルトラマリンブルー）、紺青（プルシアンブルー）、黄土（イエローオーカー）、黄鉛（クロムイエロー）、亜鉛黄（ジンクイエロー）、ニッケルチタンイエロー、ビスマスバナジウムイエロー、カドミウムイエロー、弁柄（酸化鉄）、鉛丹、辰砂（硫化水銀）、カドミウムレッド、沈降性硫酸バリウム、バライタ粉、マイカ、パールマイカ、アルミニウム粉等の金属粉、フレーク状の金属粉等が挙げられ、有機顔料としてはレーキ顔料の他に、多環式系、フタロシアニン系、溶性アゾ系、不溶性アゾ系、ポリアゾ系、染付け系のもの等が挙げられる。 Specific inorganic pigments include titanium white (titanium dioxide), zinc white (zinc oxide), calcium carbonate, kaolin, graphite (carbon black), ultramarine blue, bitumen (Prussian blue), ocher (yellow ocher) ), Yellow lead (chrome yellow), zinc yellow (zinc yellow), nickel titanium yellow, bismuth vanadium yellow, cadmium yellow, dial (iron oxide), red lead, cinnabar (mercury sulfide), cadmium red, precipitated barium sulfate Metal powders such as baryta powder, mica, pearl mica, aluminum powder, and flake-like metal powders. In addition to lake pigments, organic pigments include polycyclic, phthalocyanine, soluble azo, and insoluble azo. Type, polyazo type, dyeing type and the like.
さらに本発明の塗工層には、消泡剤、湿潤剤、凍結防止剤、防腐剤、粘度調整剤、反応促進・遅延剤、分散剤、可塑剤、有機着色剤等を添加してもよい。その他プラスチックピグメントと呼ばれる有機フィラー類も加えて良い。また塗工剤を塗工しやすくし、乾燥性を向上させる目的から、塗工剤に若干の有機溶剤等を用いることができる。
塗工剤は、従来公知の溶剤を用いて上記組成物を溶剤の相の中に溶解、分散、乳濁分散、希釈して、流動性があり塗工可能なものを用いる。溶剤としては水を主体とするものを用いることが好ましい。
二軸延伸フィルム上に塗工層を設ける方法としては、コンマ方式、ロール方式、ロッド方式、カーテン方式、グラビア方式、ブレード方式、エアーナイフ方式、サイズプレス方式、ワイヤーバー方式、スライドホッパー方式、リバースグラビア方式等の一般的な塗工方法が用いられる。またこれら一般的な塗工方法を適宜組み合わせて塗工する方法も用いられる。
Furthermore, an antifoaming agent, a wetting agent, an antifreezing agent, a preservative, a viscosity modifier, a reaction accelerator / retarder, a dispersant, a plasticizer, an organic colorant and the like may be added to the coating layer of the present invention. . Other organic fillers called plastic pigments may also be added. Further, for the purpose of facilitating application of the coating agent and improving drying properties, a slight organic solvent or the like can be used for the coating agent.
As the coating agent, a composition which is fluid and can be applied is prepared by dissolving, dispersing, emulsifying and diluting the above composition in a solvent phase using a conventionally known solvent. It is preferable to use a solvent mainly composed of water.
As a method of providing a coating layer on a biaxially stretched film, comma method, roll method, rod method, curtain method, gravure method, blade method, air knife method, size press method, wire bar method, slide hopper method, reverse A general coating method such as a gravure method is used. Moreover, the method of coating combining these general coating methods suitably is also used.
本発明の塗工層は、表面塗工層および裏面塗工層ともに、塗工剤の素材、組成により、表面固有抵抗が１×１０12Ω未満、平滑度（ＪＩＳ−Ｐ−８１１９のベック指数）が１００〜５，０００秒となるように調整することが好ましい。
表面固有抵抗が１×１０12Ωを越えると用紙間でブロッキングを生じたり、ほこりが投票用紙に付着しやすい。平滑度は、より平滑である（ベック指数値が高い）程、手で投票用紙をめくる作業が容易となるが、平滑度が余り高くなりすぎるとブロッキングを生じるようになり開票に支障を来たす可能性がある。また鉛筆筆記性も悪化する。
塗工層の厚みは表面側、裏面側とも０．０５〜１０μｍ程度とする。選挙投票用紙の肉厚は６０〜１５０μｍであることが好ましく、７０〜１４０μｍであることがより好ましく、８０〜１３０μｍであることが特に好ましい。
The coating layer of the present invention has a surface resistivity of less than 1 × 10 12 Ω, smoothness (Beck index of JIS-P-8119), depending on the material and composition of the coating agent. ) Is preferably adjusted to 100 to 5,000 seconds.
When the surface resistivity exceeds 1 × 10 12 Ω, blocking occurs between sheets, and dust tends to adhere to the voting sheet. The smoother the smoothness (the higher the Beck index value), the easier it is to turn the ballots by hand. However, if the smoothness is too high, blocking may occur and hinder votes. There is sex. Pencil writing performance also deteriorates.
The thickness of the coating layer is about 0.05 to 10 μm on both the front side and the back side. The wall thickness of the election ballot is preferably 60 to 150 μm, more preferably 70 to 140 μm, and particularly preferably 80 to 130 μm.
以下、実施例などを用いて本発明を更に詳細に説明する。ただし、以下に示す材料、使用量、割合、操作等は、本発明の趣旨を逸脱しない限り適時変更することができる。従って、本発明の範囲は以下に示す実施例などにより何ら制限されるものではない。なお、実施例中の配合の％および部は全て重量基準である。
＜製造例１＞
ポリプロピレン（日本ポリケム（株）社製、商品名：ノバテックＰＰ ＭＡ４）７２重量％、炭酸カルシウム（備北粉化工業（株）社製、商品名：ソフトン１８００）２０重量％、二酸化チタン（石原産業（株）社製、商品名：ＣＲ−６０）８重量％を混合した組成物（Ａ１）を主押出機へ、さらにポリプロピレン（日本ポリケム（株）社製、商品名：ノバテックＰＰ ＭＡ４）９８重量％、炭酸カルシウム（備北粉化工業（株）社製、商品名：ソフトン１８００）２重量％を混合した組成物（Ａ２）を副押出機１および副押出機２へそれぞれ導入し、２７０℃の温度に設定した副押出機１、主押出機、副押出機２により溶融混練された上記組成物（Ａ１）、（Ａ２）を各押出機が接続するＴダイヘッドより三層共押出手法によりシート状に押し出し、冷却装置により冷却して、Ａ２／Ａ１／Ａ２の構成を有する積層無延伸シートとして得た。
Hereinafter, the present invention will be described in more detail with reference to examples. However, the materials, amounts used, ratios, operations, and the like shown below can be changed as appropriate without departing from the spirit of the present invention. Accordingly, the scope of the present invention is not limited by the following examples. In the examples,% and parts of the formulation are all based on weight.
<Production Example 1>
72% by weight of polypropylene (manufactured by Nippon Polychem Co., Ltd., trade name: Novatec PP MA4), 20% by weight of calcium carbonate (manufactured by Bihoku Powder Chemical Co., Ltd., trade name: Softon 1800), titanium dioxide (Ishihara Sangyo ( Co., Ltd., trade name: CR-60) 8% by weight of the composition (A1) mixed with the main extruder, polypropylene (Nihon Polychem Co., Ltd., trade name: Novatec PP MA4) 98% by weight The composition (A2) mixed with 2% by weight of calcium carbonate (Bihoku Flour Industry Co., Ltd., trade name: Softon 1800) was introduced into the sub-extruder 1 and sub-extruder 2 respectively, and the temperature was 270 ° C. The composition (A1) and (A2) melt-kneaded by the sub-extruder 1, the main extruder, and the sub-extruder 2 set in the above are formed into a sheet by a three-layer coextrusion technique from a T-die head to which each extruder is connected. Push Out, and cooled by a cooling apparatus to obtain a laminated unstretched sheet having a structure of A2 / A1 / A2.
なお、上記組成物（Ａ１）、（Ａ２）には、配合した熱可塑性樹脂１００重量部に対して、酸化防止剤としてフェノール系安定剤（チバ・スペシャルティ・ケミカルズ（株）社製、商品名：イルガノックス１０１０）０．０５重量部、リン系安定剤（ジー・イー・プラスチック（株）社製、商品名：ウエストン６１８）０．０５重量部、ラジカル補足剤としてヒンダードアミン系安定剤（三共（株）社製、商品名：ＨＡ−７０Ｇ）０．０５重量部を配合した。
次いで、この積層無延伸シートを１５０℃の温度にまで再度加熱した後、縦方向に５倍の延伸を行い、縦延伸後の同シートを再び１５５℃の温度にまで再加熱し、テンターを用いて横方向に９倍延伸して（面積延伸倍率：４５倍）、１６５℃の温度でアニーリング処理し、６０℃の温度にまで冷却し、耳部をスリットした上、コロナ放電処理を施し、３層構造の厚さ７０μｍ（Ａ２／Ａ１／Ａ２＝１０μｍ／５０μｍ／１０μｍ）の積層フィルムで、白色度９８％、不透明度９４％、空孔率３２％、密度０．８４ｇ／ｃｍ3の二軸延伸フィルムを得た。
The compositions (A1) and (A2) have a phenolic stabilizer (made by Ciba Specialty Chemicals Co., Ltd., trade name) as an antioxidant with respect to 100 parts by weight of the blended thermoplastic resin. Irganox 1010) 0.05 part by weight, phosphorus stabilizer (manufactured by GE Plastics Co., Ltd., trade name: Weston 618) 0.05 part by weight, hindered amine stabilizer (Sankyo ( Co., Ltd., trade name: HA-70G) was mixed with 0.05 part by weight.
Next, this laminated unstretched sheet is heated again to a temperature of 150 ° C., then stretched 5 times in the machine direction, and the sheet after longitudinal stretching is reheated to a temperature of 155 ° C. again, using a tenter. Then, the film was stretched 9 times in the transverse direction (area stretch ratio: 45 times), annealed at a temperature of 165 ° C., cooled to a temperature of 60 ° C., slitted at the ear, and subjected to a corona discharge treatment. A laminated film with a layer structure thickness of 70 μm (A2 / A1 / A2 = 10 μm / 50 μm / 10 μm), biaxial with whiteness of 98%, opacity of 94%, porosity of 32% and density of 0.84 g / cm 3 A stretched film was obtained.
＜製造例２＞
ポリプロピレン（日本ポリケム（株）社製、商品名：ノバテックＰＰ ＭＡ４）７０重量％、炭酸カルシウム（備北粉化工業（株）社製、商品名：ソフトン１８００）１５重量％、二酸化チタン（石原産業（株）社製、商品名：ＣＲ−６０）１５重量％を混合した組成物（Ａ１）を主押出機へ、ポリプロピレン（日本ポリケム（株）社製、商品名：ノバテックＰＰ ＭＡ４）９８％、炭酸カルシウム（備北粉化工業（株）社製、商品名：ソフトン１８００）２重量％を混合した組成物（Ａ２）を副押出機１および副押出機２へ、加えてポリプロピレン（日本ポリケム（株）社製、商品名：ノバテックＰＰ ＭＡ４）１００重量％からなる組成物（Ａ３）を副押出機３および副押出機４へそれぞれ導入し、２７０℃の温度に設定した副押出機１、副押出機３、主押出機、副押出機４、副押出機２により溶融混練された上記組成物（Ａ１）、（Ａ２）、（Ａ３）を各押出機が接続するＴダイヘッドにより５層共押出手法によりシート状に押し出し、冷却装置により冷却して、Ａ２／Ａ３／Ａ１／Ａ３／Ａ２の構成を有する積層無延伸シートとして得た。
<Production Example 2>
70% by weight of polypropylene (manufactured by Nippon Polychem Co., Ltd., trade name: Novatec PP MA4), 15% by weight of calcium carbonate (trade name: Softon 1800, manufactured by Bihoku Powder Chemical Co., Ltd.), titanium dioxide (Ishihara Sangyo ( Co., Ltd., trade name: CR-60) 15% by weight of the composition (A1) mixed into the main extruder, polypropylene (Nippon Polychem Co., Ltd., trade name: Novatec PP MA4) 98%, carbonic acid A composition (A2) mixed with 2% by weight of calcium (Bihoku Flour Industry Co., Ltd., trade name: Softon 1800) was added to the sub-extruder 1 and sub-extruder 2, and polypropylene (Nippon Polychem Co., Ltd.) Product name: Novatec PP MA4) 100% by weight of the composition (A3) was introduced into the sub-extruder 3 and sub-extruder 4 respectively, and the sub-extruder 1 and sub-unit set at a temperature of 270 ° C. Five layers are co-extruded by the T-die head to which the above-mentioned compositions (A1), (A2), and (A3) are melt-kneaded by the extruder 3, the main extruder, the sub-extruder 4, and the sub-extruder 2 are connected to each extruder. The sheet was extruded into a sheet shape by a method and cooled by a cooling device to obtain a laminated unstretched sheet having a structure of A2 / A3 / A1 / A3 / A2.
なお、上記組成物（Ａ１）、（Ａ２）には、配合した熱可塑性樹脂１００重量部に対して、酸化防止剤としてフェノール系安定剤（チバ・スペシャルティ・ケミカルズ（株）社製、商品名：イルガノックス１０１０）０．０５重量部、リン系安定剤（ジー・イー・プラスチック（株）社製、商品名：ウエストン６１８）０．０５重量部、ラジカル補足剤としてヒンダードアミン系安定剤（三共（株）社製、商品名：ＨＡ−７０Ｇ）を０．０５重量部配合した。
次いで、この積層無延伸シートを１５０℃の温度にまで再度加熱した後、縦方向に５倍の延伸を行い、延伸後はアニーリングを行う。縦延伸後の同シートを再び１５５℃の温度にまで再加熱し、テンターを用いて横方向に９倍延伸して（面積延伸倍率：４５倍）、１６５℃の温度でアニーリング処理し、６０℃の温度にまで冷却し、耳部をスリットした上、コロナ放電処理を施し、５層構造の厚さ７０μｍ（Ａ２／Ａ３／Ａ１／Ａ３／Ａ２＝５μｍ／５μｍ／５０μｍ／５μｍ／５μｍ）の積層フィルムで、白色度９８％、不透明度９５％、空孔率２４％、密度１．０ｇ／ｃｍ3の熱可塑性樹脂フィルムを得た。
The compositions (A1) and (A2) have a phenolic stabilizer (made by Ciba Specialty Chemicals Co., Ltd., trade name) as an antioxidant with respect to 100 parts by weight of the blended thermoplastic resin. Irganox 1010) 0.05 part by weight, phosphorus stabilizer (manufactured by GE Plastics Co., Ltd., trade name: Weston 618) 0.05 part by weight, hindered amine stabilizer (Sankyo ( Co., Ltd., trade name: HA-70G) was mixed at 0.05 part by weight.
Next, the laminated unstretched sheet is heated again to a temperature of 150 ° C., then stretched 5 times in the longitudinal direction, and annealed after stretching. The sheet after longitudinal stretching is reheated to a temperature of 155 ° C. again, stretched 9 times in the transverse direction using a tenter (area stretching ratio: 45 times), and annealed at a temperature of 165 ° C., 60 ° C. After cooling to a temperature of 5 ° C., slitting the ears and applying a corona discharge treatment, a five-layer structure having a thickness of 70 μm (A2 / A3 / A1 / A3 / A2 = 5 μm / 5 μm / 50 μm / 5 μm / 5 μm) As a film, a thermoplastic resin film having a whiteness of 98%, an opacity of 95%, a porosity of 24%, and a density of 1.0 g / cm 3 was obtained.
＜製造例３＞
二軸延伸フィルムの比較として、特許文献１：特公平０７−０５１３９３号公報の合成紙の製造例を参照して、基紙を製造した。
ポリプロピレン（日本ポリケム（株）社製、商品名：ノバテックＰＰ、ＭＡ４）９０部、高密度ポリエチレン（日本ポリエチレン（株）社製、商品名：ノバテックＨＤ、ＨＪ３８１Ｐ）１０部、酸化チタン（石原産業（株）社製、商品名：ＣＲ−６０）０．８部、平均粒径１．５μｍのクレイ（エンゲルハード社製、商品名：サチントンスペシャル）１５部、酸化防止剤としてフェノール系安定剤（チバ・スペシャルティ・ケミカルズ（株）社製、商品名：イルガノックス１０７６）０．３部、分散剤としてオレイン酸（花王（株）社製、商品名：ルナック）０．１部、ラジカル補足剤としてヒンダードアミン系安定剤（三共（株）社製、商品名：サノールＬＳ−７７０）０．０６重量部よりなる組成物（Ａ１）を、押出機を用いて熔融、混練したのち、ダイより２００℃の温度でシート状に押出し、５０℃まで該シートを冷却した。次いでこの無延伸シートを１３５℃に加熱した後、ロール群の周速差を利用して縦方向に４倍延伸して縦延伸シートを得た。
<Production Example 3>
As a comparison of the biaxially stretched film, a base paper was produced with reference to a synthetic paper production example of Japanese Patent Publication No. 07-05393.
90 parts of polypropylene (manufactured by Nippon Polychem Co., Ltd., trade name: Novatec PP, MA4), 10 parts of high density polyethylene (manufactured by Nippon Polyethylene Corporation, trade name: Novatec HD, HJ381P), titanium oxide (Ishihara Sangyo ( Co., Ltd., trade name: CR-60) 0.8 parts, average particle size 1.5 μm clay (trade name: Satinton Special) 15 parts, phenolic stabilizer (antioxidant) ( Ciba Specialty Chemicals Co., Ltd., trade name: Irganox 1076) 0.3 parts, dispersant oleic acid (Kao Co., Ltd., trade name: Lunac) 0.1 parts, radical scavenger A composition (A1) composed of 0.06 parts by weight of a hindered amine stabilizer (manufactured by Sankyo Co., Ltd., trade name: SANOL LS-770) was melted and mixed using an extruder. After the, extruded into a sheet at a temperature of 200 ° C. through a die, and cooling the sheet to 50 ° C.. Next, this unstretched sheet was heated to 135 ° C., and then stretched 4 times in the longitudinal direction using the peripheral speed difference of the roll group to obtain a longitudinally stretched sheet.
別にポリプロピレン（日本ポリケム（株）社製、商品名：ノバテックＰＰ ＭＡ４）１００部、平均粒径１．５μのクレイ（エンゲルハード社製、商品名：サチントンスペシャル）８０部、酸化チタン（石原産業（株）社製、商品名：ＣＲ−６０）１０部、ラジカル補足剤としてヒンダードアミン系安定剤（三共（株）社製、商品名：サノールＬＳ−７７０）０．４部、酸化防止剤としてフェノール系安定剤（（株）エーピーアイ コーポレーション社製、商品名：ヨシノックスＢＨＴ）０．１部、ヒンダードアミン系安定剤（チバ・スペシャルティ・ケミカルズ（株）社製、商品名：チヌビン３２９）０．１部、酸化防止剤としてフェノール系安定剤（チバ・スペシャルティ・ケミカルズ（株）社製、商品名：イルガノックス１０７６）０．１部、分散剤としてオレイン酸（花王（株）社製、商品名：ルナック）０．１部の割合で配合した組成物（Ａ２）を、別の２台の押出機を用いて溶融混練し、ダイスより２００℃の温度でシート状に押し出し、前記縦延伸シートの両面にラミネートした。
得られた積層フィルムは、一旦室温より２０℃高い温度（４５℃）まで冷却後、１５５℃に再加熱し、テンターを用いて横方向に８倍延伸し、次いで１６０℃のオーブン中を通過させて熱セット（アニーリング処理）し、耳部をスリットした上、更にコロナ放電処理を施し、３層構造の厚さ９０μｍ（Ａ２／Ａ１／Ａ２＝１０μｍ／７０μｍ／１０μｍ、一軸延伸／二軸延伸／一軸延伸）の延伸積層フィルムで、白色度９７％、不透明度９５％、空孔率３６％、密度０．７３ｇ／ｃｍ3の基紙を得た。
Separately, 100 parts of polypropylene (manufactured by Nippon Polychem Co., Ltd., trade name: Novatec PP MA4), 80 parts of clay having a mean particle size of 1.5 μ (trade name: Satinton Special, manufactured by Engelhard), titanium oxide (Ishihara Sangyo) Co., Ltd., trade name: CR-60) 10 parts, hindered amine stabilizer as a radical scavenger (Sankyo Co., Ltd., trade name: Sanol LS-770) 0.4 part, phenol as antioxidant -Based stabilizer (manufactured by API Corporation, trade name: Yoshinox BHT) 0.1 part, hindered amine stabilizer (manufactured by Ciba Specialty Chemicals Co., Ltd., trade name: Tinuvin 329) 0.1 part As a antioxidant, a phenol-based stabilizer (manufactured by Ciba Specialty Chemicals Co., Ltd., trade name: Irganox 1076) 0.1 Part, a composition (A2) blended at a ratio of 0.1 part of oleic acid (trade name: Lunac, manufactured by Kao Corporation) as a dispersant, melt-kneaded using another two extruders, The sheet was extruded from a die at a temperature of 200 ° C. and laminated on both sides of the longitudinally stretched sheet.
The obtained laminated film was once cooled to a temperature 20 ° C higher than room temperature (45 ° C), reheated to 155 ° C, stretched 8 times in the transverse direction using a tenter, and then passed through an oven at 160 ° C. And then heat setting (annealing treatment), slitting the ears, and further applying corona discharge treatment, the thickness of the three-layer structure is 90 μm (A2 / A1 / A2 = 10 μm / 70 μm / 10 μm, uniaxial stretching / biaxial stretching / A base paper having a whiteness of 97%, an opacity of 95%, a porosity of 36%, and a density of 0.73 g / cm 3 was obtained using a stretched laminated film of uniaxial stretching.
［実施例１］
前記製造例１で得た厚さ７０μｍの二軸延伸フィルムの表裏面に、下記の表に示す組成と配合量を有する表面用塗工剤と裏面用塗工剤を、それぞれバーコーターを用いて塗布し、１００℃で乾燥させて、表面塗工層の厚さが８μ、裏面塗工層の厚さが６μの白色の塗工紙を得た。
この選挙投票用紙の物性を表−１に示す。
[Example 1]
On the front and back surfaces of the biaxially stretched film having a thickness of 70 μm obtained in Production Example 1, a surface coating agent and a back surface coating agent having the composition and blending amount shown in the following table were respectively used with a bar coater. It was applied and dried at 100 ° C. to obtain a white coated paper having a surface coating layer thickness of 8 μm and a back coating layer thickness of 6 μm.
The physical properties of this election ballot are shown in Table-1.
［実施例２］
前記製造例２で得た厚さ７０μｍの二軸延伸フィルムの表裏面に、下記の表に示す組成と配合量を有する表面用塗工剤と裏面用塗工剤を、それぞれバーコーターを用いて塗布し、１００℃で乾燥させて、表面塗工層の厚さが８μ、裏面塗工層の厚さが６μの水色（アサギ色）の塗工紙を得た。
この選挙投票用紙の物性を表−１に示す。
[Example 2]
On the front and back surfaces of the biaxially stretched film having a thickness of 70 μm obtained in Production Example 2, the coating agent for the surface and the coating agent for the back surface having the composition and blending amount shown in the following table were respectively used with a bar coater. It was applied and dried at 100 ° C. to obtain a light blue (asagi) coated paper having a surface coating layer thickness of 8 μm and a back surface coating layer thickness of 6 μm.
The physical properties of this election ballot are shown in Table-1.
［比較例１］
実施例１で使用した二軸延伸フィルムを前記製造例３の基紙に変更する以外は、すべて実施例１と同様な手法で選挙投票用紙を作成した。
この選挙投票用紙の物性を表−１に示す。
＜評価例＞
厚さ
ＪＩＳ−Ｐ−８１１８：１９９８に記載の方法に基づき、測定した。なお、各層の厚さは二軸延伸フィルム乃至塗工紙の断面を電子顕微鏡で観察し、その比率から算出した。
密度
ＪＩＳ−Ｐ−８１２４：１９９８に記載の方法に基づき、算出した。
[Comparative Example 1]
Election ballots were prepared in the same manner as in Example 1 except that the biaxially stretched film used in Example 1 was changed to the base paper of Production Example 3.
The physical properties of this election ballot are shown in Table-1.
<Evaluation example>
The thickness was measured based on the method described in JIS-P-8118: 1998. The thickness of each layer was calculated from the ratio of a biaxially stretched film or coated paper observed with an electron microscope.
Density was calculated based on the method described in JIS-P-8124: 1998.
白色度
ＪＩＳ−Ｌ−１０１５：１９９９に記載の方法に基づき、測定した。
不透明度
ＪＩＳ−Ｐ−８１４９：２０００に記載の方法に準拠し、標準黒色板を裏当てして測定した視感反射率を、標準白色板を裏当てして測定した固有視感反射率にて除した値を不透明度とし、百分率で算出した。
空孔率
請求項７および明細書内に記載の計算式（式（１））に基づき、算出した。
Whiteness was measured based on the method described in JIS-L-1015: 1999.
Opacity JIS-P-8149: According to the method described in 2000, the luminous reflectance measured by backing a standard black plate is the intrinsic luminous reflectance measured by backing a standard white plate. The value obtained by dividing was defined as opacity and calculated as a percentage.
It calculated based on the calculation formula (formula (1)) described in claim 7 of the porosity and the specification.
平滑度（ベック平滑度）
得られた選挙投票用紙の平滑度を、ＪＩＳ−Ｐ−８１１９：１９９８に記載の方法に基づき、測定した。
結果を表−１に示す。
表面固有抵抗
得られた選挙投票用紙の表面固有抵抗を、ＪＩＳ−Ｋ−６９１１：１９９５に記載の方法に基づき、温度２３℃、相対湿度５０％の条件下で、絶縁計（東亜電波工業（株）製、商品名：ＤＳＭ−８１０３）を用いて測定した。
結果を表−１に示す。
鉛筆筆記性
評価担当者を１０名選択し、各自にＨＢの鉛筆にて、得られた選挙投票用紙の表面側に本人氏名を記入した。
筆記性が、市販コピー用紙並で良好と判断した人数が１０名であれば筆記性良好、９名以下なら筆記性を不良とした。
結果を表−１に示す。
Smoothness (Beck smoothness)
The smoothness of the obtained election ballot was measured based on the method described in JIS-P-8119: 1998.
The results are shown in Table-1.
The surface resistivity of the electoral voting paper obtained is measured according to the method described in JIS-K-6911: 1995 under the conditions of a temperature of 23 ° C. and a relative humidity of 50% (Toa Denpa Kogyo Co., Ltd.). ), Trade name: DSM-8103).
The results are shown in Table-1.
Ten persons in charge of pencil writing evaluation were selected, and each person entered his / her name on the front side of the obtained election ballot using an HB pencil.
Writability was good when the number of persons judged to be as good as commercially available copy paper was 10, and poor when 9 or less.
The results are shown in Table-1.
折り回復時間
得られた選挙投票用紙の折り回復時間を、以下の手順で測定した。
評価機として石川島産業機械社製印刷適性試験機；ＲＩ−１型印刷機を使用した。
まず、選挙投票用紙を１０ｃｍ×１０ｃｍのサイズに切断した上、折り目がつかないように曲げながら、その一辺とその対向する一辺とを合わせてループ形状（横から見て涙形状）にし、両辺を合わせた部分を紙咥え部に差し込む。
次いで、印刷速度２０ｒｐｍ、ニップクリアランス１ｍｍ設定した評価機器にて、空印刷を行う。印刷直後に１８０°折り曲がった（折り角０°）サンプルを分度器があらかじめセットした実験台の上に速やかに置き、形端を押さえつつ、折り角が１２０°に戻った時間を測定した。
また折り方向を縦目および横目でそれぞれ行い、平均値を折り回復時間とした。
結果を表−１に示す。
Fold recovery time Fold recovery time of election ballots obtained was measured according to the following procedure.
As an evaluation machine, a printability tester manufactured by Ishikawajima Industrial Machinery Co., Ltd .; RI-1 type printer was used.
First, the election ballot paper is cut into a size of 10 cm x 10 cm, and bent so that there is no crease, the one side and the opposite side are combined into a loop shape (a tear shape when viewed from the side), and both sides are Insert the combined part into the paper holding part.
Next, blank printing is performed with an evaluation device set at a printing speed of 20 rpm and a nip clearance of 1 mm. A sample bent 180 ° immediately after printing (0 ° folding angle) was quickly placed on an experimental table set in advance by a protractor, and the time when the folding angle returned to 120 ° was measured while holding the shape end.
The folding direction was performed for each of the vertical and horizontal lines, and the average value was defined as the folding recovery time.
The results are shown in Table-1.
本発明は、折り回復力を改良し、開票時間の短縮化に大きく貢献することができる選挙投票用紙に関する。 The present invention relates to an election ballot that can improve the folding resilience and can greatly contribute to shortening the time for counting votes.
Claims (7)
（ａ）水性樹脂バインダー
（ｂ）無機微細粉末
（ｃ）帯電防止機能を有する水溶性ポリマー
を含有していることを特徴とする請求項１記載の投票用紙。 The coating layer is
2. The voting paper according to claim 1, comprising (a) an aqueous resin binder, (b) an inorganic fine powder, and (c) a water-soluble polymer having an antistatic function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007096157A JP4925897B2 (en) | 2007-04-02 | 2007-04-02 | Election ballot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007096157A JP4925897B2 (en) | 2007-04-02 | 2007-04-02 | Election ballot |
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| JP2007176185A JP2007176185A (en) | 2007-07-12 |
| JP4925897B2 true JP4925897B2 (en) | 2012-05-09 |
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| JP4931715B2 (en) * | 2007-07-17 | 2012-05-16 | 株式会社ユポ・コーポレーション | Election ballot |
| JP5125710B2 (en) * | 2008-04-11 | 2013-01-23 | 凸版印刷株式会社 | Writing sheet |
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| JPH0751393B2 (en) * | 1988-02-02 | 1995-06-05 | 王子油化合成紙株式会社 | Election ballot |
| JP2718753B2 (en) * | 1989-04-11 | 1998-02-25 | 王子油化合成紙株式会社 | Election ballot paper |
| JPH0688474B2 (en) * | 1989-06-09 | 1994-11-09 | 王子油化合成紙株式会社 | Election ballot |
| JPH06332376A (en) * | 1993-05-18 | 1994-12-02 | Oji Yuka Synthetic Paper Co Ltd | Tag |
| JPH08230369A (en) * | 1995-02-24 | 1996-09-10 | New Oji Paper Co Ltd | Ballot paper for election |
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