JP3897700B2 - Wrapping paper for smoking articles to reduce the amount of visible sidestream smoke - Google Patents

Wrapping paper for smoking articles to reduce the amount of visible sidestream smoke Download PDF

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JP3897700B2
JP3897700B2 JP2002590167A JP2002590167A JP3897700B2 JP 3897700 B2 JP3897700 B2 JP 3897700B2 JP 2002590167 A JP2002590167 A JP 2002590167A JP 2002590167 A JP2002590167 A JP 2002590167A JP 3897700 B2 JP3897700 B2 JP 3897700B2
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amount
sidestream smoke
wrapping paper
visible
visible light
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JPWO2002092913A1 (en
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聡 石川
健夫 塘
真 佐藤
馨 井上
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Japan Tobacco Inc
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Japan Tobacco Inc
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H27/00Special paper not otherwise provided for, e.g. made by multi-step processes
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00Cigars; Cigarettes
    • A24D1/02Cigars; Cigarettes with special covers
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03Non-macromolecular organic compounds
    • D21H17/05Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14Carboxylic acids; Derivatives thereof
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63Inorganic compounds
    • D21H17/67Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675Oxides, hydroxides or carbonates

Abstract

A winding paper for smoking goods capable of reducing the amount of visible sidestream smoke of a tobacco, which comprises calcium carbonate in an amount of 30 g/m 2> or more and a combustion regulating agent in an amount of 3 mass% or more.

Description

【0001】
【発明の属する技術分野】
本発明は、タバコ可視副流煙の量を低減させる喫煙物品用巻紙に関する。
【0002】
【従来の技術】
近年、副流煙発生量の少ない低副流煙シガレットが開発されている。かかるシガレットが実際に副流煙の発生量が少ないかどうかは、通常、いわゆるフィッシュテール法により決定されている。フィッシュテール法は、特開平10−81号公報等に図面を参照して記述されている。簡単に述べると、フィッシュテール法は、フィッシュテール形状の開口下端部を有する煙チャンバを使用する。煙チャンバの上部にはケンブリッジフィルター(直径44mm)が取り付けられている。この煙チャンバの上端部から3リットル/分の割合で空気を吸引しながら、煙チャンバの下端部でシガレットを所定長自然燃焼させる。このとき発生する副流煙中の粒状物質を、ケンブリッジフィルターと煙チャンバの内壁とに付着させ、それらの質量を測定する。すなわち、粒状物質を捕捉したケンブリッジフィルターの質量から元のケンブリッジフィルターの質量を差し引いた質量を先に求める。次に、ケンブリッジフィルター上および煙チャンバ内壁に付着した粒状物質を各々溶媒で抽出して吸光度を測定し、得られた各吸光度の比と、先に算出したケンブリッジフィルター上に付着した粒状物質の質量の値(差し引いた値)から、煙チャンバの内壁に付着した粒状物質の質量を算出する。このように得られた、ケンブリッジフィルター上に付着した粒状物質の質量と煙チャンバの内壁に付着した粒状物質の質量とを加算した値を、タバコ1本当りの副流煙量(mg/cig)とする。また、この方法において、所定の長さを自然燃焼させるに要する時間を測定し、この測定した時間で1本当りの副流煙量を除した値を時間当りの副流煙量(mg/min)として表す。得られた時間当りの副流煙量は、従来の低副流煙シガレットの開発では、見た目の副流煙量に近似するものとみなされてきた。
【0003】
このようなシガレットの副流煙量を質量測定によらずに、光学的手法により連続的または瞬時に測定する装置も提案されている(特開平3−120444号公報)。この光学的装置は、燃焼室内で燃焼させたシガレットから発生する副流煙を透過させるように光束を照射し、副流煙を透過した光束の強度を測定するものである。この測定された光束強度は、副流煙の濃度に対応し、したがって全粒状物質の量を反映するものである。
【0004】
しかしながら、フィッシュテール法のような全粒状物質の質量で評価して副流煙量が同程度に低いとされたシガレットのうちでも、喫煙時に実際に見た目で観察したとき、副流煙量に差があることがあり、全粒状物質の質量による副流煙量が、目視観察による副流煙量と必ずしも相関しないことがわかった。上記光学的に測定された副流煙量も副流煙濃度に対応するものであるから、目視観察による副流煙量と必ずしも相関しないといえる。
【0005】
シガレットのような喫煙物品は、全粒状物質の質量が低いばかりでなく、実際の目視観察によっても副流煙量が少ないことが望ましいといえる。
【0006】
【発明が解決しようとする課題】
従って、本発明は、目視観察による副流煙量(本明細書において、「可視副流煙量」ともいう)を低減させ得る喫煙物品用巻紙を提供することを目的とする。
【0007】
【課題を解決するための手段】
本発明者は、上記目的を達成すべく鋭意研究した結果、巻紙に炭酸カルシウムを特定の量で、かつ燃焼調節剤を特定の割合で配合することにより可視副流煙量を大幅に低下させることができることを見いだした。本発明は、この知見に基づく。
【0008】
すなわち、本発明は、巻紙中に炭酸カルシウムを30g/m2 以上、燃焼調節剤を3質量%以上の割合で含有し、巻紙前記炭酸カルシウム量を保持したままトップサイドの表面層とボトムサイドの表面層の炭酸カルシウム量を少なくしたことを特徴とするタバコ可視副流煙量を低減させる喫煙物品用巻紙を提供する。
【0009】
本発明において、燃焼調節剤は、クエン酸カリウムおよびクエン酸ナトリウムからなる群の中から選ばれることが好ましい。
【0010】
【発明の実施の形態】
以下、本発明をより詳しく説明する。
【0011】
本発明の喫煙物品用巻紙に用いられるパルプは、通常の喫煙物品(特に、シガレット)用巻紙に使用されている亜麻パルプ、木材パルプ等から構成される。パルプの量は、抄紙上またはタバコの巻上げに必要とされる強度を保てる量が実用的であり、好ましくは20〜50g/m2 である。
【0012】
本発明の喫煙物品用巻紙は、上記パルプに炭酸カルシウムを特定の量以上含有し、かつ燃焼調節剤を特定の割合以上で添加したものである。炭酸カルシウムは、30g/m2 以上、50g/m2 以下の量で配合され、燃焼調節剤は、巻紙中に3〜15質量%以上の割合で配合される。炭酸カルシウムの量が30g/m2 未満の場合、および/または燃焼調節剤の割合が3質量%未満の場合には、可視副流煙量の低減効果が十分に発揮されない。
【0013】
炭酸カルシウムは、粒子の形態で添加され、その粒径は、コスト、抄紙のしやすさの観点から適宜選ぶことができるが、0.02μm〜10μmであることが好ましい。
【0014】
なお、巻紙は、50g/m2 〜100g/m2 の坪量を有することが好ましい。
【0015】
燃焼調節剤としては、クエン酸アルカリ金属塩が好ましく用いられ、特に好ましくは、クエン酸カリウムおよびクエン酸ナトリウムであり、これらは単独で、または組み合わせて用いることができる。
【0016】
ところで、長網抄紙機で製造した填料内添紙は、紙層形成時のワイヤー側からの脱水に伴い、フェルト側に比べワイヤー側の填料が少なくなるため、紙の厚さ方向(Z方向とも称する)において紙中の填料と繊維の分布に偏りが生じ、二面性を持った紙シートとなる。この二面性は印刷用紙の分野では印刷品質や用紙の特性の面で欠点となる場合があるが、従来の巻紙ではこの二面性はシガレット燃焼時の灰の収斂性の点で好ましく、その他の影響はほとんど問題となっていない。
【0017】
しかしながら、本発明のように非常に多くの填料を含有する巻紙を従来の長網抄紙機で製造すると、フェルト側表面に多量に含有された填料がシガレット製造時に脱落し、紙粉トラブルやラップ不良等の問題を発生させ易くなり、高速でのシガレット製造を阻害する要因となる。
【0018】
上記の問題を解決するためには、巻紙に含まれる紙中填料量を保持したまま、表面近くに分布する填料だけを少なくする必要がある。巻紙に含まれる紙中填料量を保持したまま、表面近くに分布する填料だけを少なくする手段として、両面脱水型ワイヤーパートによる紙層形成の抄紙装置が挙げられる。両面脱水型ワイヤーパートとはツインワイヤー式ワイヤーパートのことであり、ツインワイヤーマシンおよび長網抄紙機の一部をツインワイヤー化した、いわゆるオントップ型ワイヤーあるいはハイブリッド型ワイヤーと称されるワイヤーパートを備えた抄紙機が挙げられる。一般的な長網抄紙機においては紙層形成時の脱水はワイヤー側でのみ行われるが、ツインワイヤー式では抄紙用紙料の上下に接する2枚のワイヤーからの脱水により紙層形成が行われるため、巻紙表面の填料含有量を少なくすることが可能となる。一般的な長網抄紙機で製造された巻紙ではフェルト面の填料含有量が最も高くワイヤー面に向けて漸減しているのに対し、ツインワイヤー式抄紙機で製造された巻紙は紙層内部と表面層の填料含有量の差が小さく、紙層全体の填料含有量と各層の填料含有量の差はかなり小さいものとなる。なお、本発明では、巻紙表面から厚さ方向に全体の質量の18〜20質量%に相当する部分を表面層と定義し、その灰分を表面層の灰分として表す。また、巻紙の表と裏の二つの表面を、一般的に、従来の長網抄紙機で製造された場合は、各々フェルト側、ワイヤー側、ツインワイヤー式抄紙機で製造された場合は、各々トップワイヤー側、ボトムワイヤー側と呼び分けているが、本発明では、フェルト側およびトップワイヤー側をトップサイド、ワイヤー側およびボトムワイヤー側をボトムサイドと称することとする。本発明においては、巻紙のトップサイドおよびボトムサイドの少なくとも一方の表面層の灰分が、35質量%以下であることが好ましく、巻紙のトップサイドおよびボトムサイドの表面層の灰分が、ともに35質量%以下であることがさらに好ましい。
【0019】
ここで、表面層の灰分は、巻紙試料を厚さ方向に数回分割し、試料の表面から厚さ方向の全体の質量の18〜20質量%に相当する表面層の灰分をJIS P 8128に準じて求めることができる。概略は以下の通りである。
【0020】
巻紙から40mm×200mmの試料を採取し質量を測定する。試料の表面に粘着テープ(幅50mm、tesa#4267)を試料の端部から端部まで空気層がないように貼り合わせ、試料よりはみ出した部分の粘着テープを切り落とした後、粘着テープの上から荷重をかけ良く密着させる。粘着テープを貼り合わせた試料の質量を再度測定して粘着テープの質量を求める。次に試料の反対面にも粘着テープを貼り合わせ、粘着テープに挟まれた試料を粘着テープの接着力を利用して二分割する。分割はT字型剥離、つまり粘着テープに挟まれた試料を垂直にし、一定速度でゆっくり水平に剥離させる。第1回目の剥離試料の剥離面に再度粘着テープを貼り合わせ同様な手順を繰り返し、表面層の質量が元の試料の質量の18〜20質量%となるまで行う。得られた表面層は1試料あたり10点をまとめて粘着テープと共に900℃で強熱し、JIS P 8128に準じて灰分を求め、粘着テープの灰分で補正して、表面層の灰分値として表す。また、これとは別に分割する前の試料の灰分を全灰分値として表す。
【0021】
本発明の喫煙物品(特に、シガレット)用巻紙は、従来の巻紙よりもタバコ可視副流煙量を大幅に低減させる。可視副流煙量の測定は、官能検査によって行うことができるが、簡便には、特願2000−268910号に開示した可視副流煙量測定装置を用いて行うことができる。
【0022】
図1は、特願2000−268910号に開示した可視副流煙量測定装置を示す概略斜視図であり、図2は、同可視副流煙量測定装置の構成を概略的に示すブロック図である。
【0023】
図1および図2に示すように、本可視副流煙量測定装置10は、喫煙物品の自然燃焼室11と、喫煙物品の自然燃焼により発生し自然燃焼室11内を自然に立ち昇る(上昇する)副流煙に対しその流れ方向に実質的に直交する方向に所定の可視光ビームを照射するための可視光照射ユニット12と、副流煙により可視光ビームの方向と実質的に直交する方向に散乱された散乱光の強度を可視副流煙量の指標として検出するための散乱光強度検出ユニット14を備える。
【0024】
自然燃焼室11は、遮光性材料で構成され、例えば4つの側壁11a〜11dにより規定される縦方向に長い直方体形状の筒体からなる。その1つの側壁11aの下部には着火したシガレット等の喫煙物品SAを自然燃焼室11内に装入するための喫煙物品挿入口111が設けられている。自然燃焼室11を規定する4つの側壁11a〜11dのそれぞれの最下端部には、喫煙物品SAの自然燃焼に要する空気を自然燃焼室11内に供給し得るように例えばメッシュ窓のような通気窓112〜115が設けられている。喫煙物品の挿入口111は、挿入口111を通して自然燃焼室11内に装入される喫煙物品SAからの副流煙SSSが通気窓112〜115を通って自然燃焼室11内に入る外部の空気の乱れに影響されず、また喫煙物品SAから自然燃焼室11の上端までの距離が副流煙SSSが実質的に揺らがないように十分なものとなる位置に設定することが好ましい。
【0025】
通気窓112〜115により囲まれた自然燃焼室11の底部空間には、喫煙物品の自然燃焼により自然燃焼室11内を立ち昇る副流煙SSSの流れを乱さないように、図示しないガラスビーズを充填して空気流整流層を形成することができる。自然燃焼室11の上端は開放されている。この開放端には、自然燃焼室11の排気を行うために排気フード15を設置することができる。この自然燃焼室11の排気は、喫煙物品SAの自然燃焼に実質的に影響を及ぼさない程度に行うことが必要である。排気を行う場合には、喫煙物品の自然燃焼により自然燃焼室11内を自然に立ち昇る副流煙SSSの流れを乱さないように、自然燃焼室11の上部開放端を横断して整流フィルター16を取り付けることが好ましい。排気フード15の頂部には排気ダクト151が設けられ、この排気ダクト151は、図示しない排気系に接続される。
【0026】
可視光照射ユニット12は、自然燃焼室11の外側に、図1に示す例では、喫煙物品SAが挿入される自然燃焼室11の側壁11aと対向する側壁11bの外側に設けられている。可視光照射ユニット12に対向する側壁11bの部分には、可視光透過窓116が設けられている。可視光照射ユニット12は、図示しない可視光源を有し、喫煙物品SAの自然燃焼により発生し自然燃焼室11内を自然に立ち昇る副流煙SSSに対しその流れ方向に実質的に直交する方向に可視光ビームVLBを照射する。可視光源としては、可視光を発するものであれば特に制限はなく、例えば、可視光レーザ、可視発光ダイオード、ハロゲンランプ等を使用することができるが、代表的には、国際照明委員会で規定されているA光源が用いられる。
【0027】
可視光照射ユニット12から照射される可視光ビーム(可視光束)VLBは、自然燃焼室11内を自然に立ち昇る副流煙SSSに対しそれが多少揺らいでも十分にカバーして可視光を照射し得るような実質的な断面を有する。例えば、可視光ビームVLBは、照射方向と直交する方向に幅w(図2)を持ち、かつ人間の視野を考慮して官能評価の際の視野に合うように、可視光ビームVLBの照射方向に実質的に直交する方向に高さを有する矩形の断面を有することができる。幅wは、可視光ビームの照射方向と直交する方向における可視副流煙SSSの揺らぎ幅に少なくとも等しいことが好ましい。なお、可視光ビームの断面は、矩形に限らず、楕円形、円形等であってもよい。このような可視光ビームの形状付けは、可視光ビームの断面に対応する開口を有するマスクを用いたり、あるいは例えば凸レンズと凹レンズとの組合せからなるレンズ系用いる等それ自体既知の手法により行うことができる。
【0028】
可視光照射ユニット12と対面して自然燃焼室11の外側に、図1に示す例では、側壁11aの外側に、測定に影響を与えないように可視光照射ユニット12から発し副流煙SSSを透過した光をすべて吸収・除去するための光吸収ユニット13を設けることが好ましい。光吸収ユニット13に対向する側壁11aの部分には、可視光透過窓117が設けられている。
【0029】
散乱光強度検出ユニット14は、可視光照射ユニット12からの照射光線の方向と直交する方向の自然燃焼室11の外側に、図1に示す例では、側壁11dの外側に設けられている。散乱光強度検出ユニット14に対向する側壁11dの部分には、可視光透過窓118が設けられている。散乱光強度検出ユニット14は、既述のように、副流煙SSSに照射され副流煙SSSにより散乱された光のうち、可視光ビームVLBの照射方向と実質的に直交する方向に散乱した散乱光(以下、90度散乱光という)SLVの強度を検出するものである。散乱光強度検出ユニット14は、90度散乱光SLVを集光するためのそれ自体既知の光学系(図示せず)を備え、その集光された90度散乱光SLVを電気信号に変換して出力する光/電気変換装置(図示せず)を有する。光/電気変換装置としては、好ましくは、光を電圧信号に変換するフォトマルチプライヤーを用いることができる。この変換された電圧信号は、例えば、A/D変換した後、パーソナルコンピュータによりデータサンプリングすることができる。データ取得間隔および取得時間は、任意に設定することができ、代表的には、0.2秒間隔で300点の測定を1分間で行うことができる。
【0030】
この検出された90度散乱光SLVの強度は、可視副流煙量と非常によく相関し、検出された90度散乱光強度が、強いほど、可視副流煙量が相対的に多いと判断することができる。なお、90度散乱光強度は、副流煙中の全粒状物質の量とは相関しないことがわかっている。
【0031】
可視光照射ユニット12と可視光透過窓116の間、光吸収ユニット13と可視光透過窓117の間、および散乱光強度検出ユニット14と可視光透過窓118の間には、それぞれ、各可視光透過窓から外部の迷走光が入射することを防止するために、外部迷走光遮蔽ボックス17〜19を設置することが好ましい。
【0032】
ここで、装置10の全体のサイズ等の代表例を示すと、自然燃焼室11は、11cm×11cmで高さが80cmの直方体であり、喫煙物品装入口111は、自然燃焼室11の下端から50cmの位置に設けられ、喫煙物品SAから可視光ビームの中央までの距離は10cmであり、可視光照射ユニットから照射される可視光ビームは、5cm×5cmの大きさの断面を有する。
【0033】
本可視副流煙量測定装置は、図2に示すように、散乱光強度検出ユニット14で検出された90度散乱光強度を、90度散乱光強度と目視による可視副流煙量との相関関係に基づいて、可視副流煙量に変換して出力する変換テーブル手段20を有することが好ましい。変換テーブル手段には、予め求めておいた90度散乱光強度と目視による可視副流煙量との相関関係が変換式、検量線等として入力されており、散乱光強度検出ユニット14から出力された90度散乱光強度信号を可視副流煙量に変換して出力する。90度散乱光強度と目視による可視副流煙量との相関関係を求めるには、まず、多数のシガレット等の喫煙物品の可視副流煙量を2点比較法による官能検査で評価して可視副流煙量を数値化する。同じ喫煙物品について本装置により検出した90度散乱光強度を測定する。そして可視副流煙量を例えば縦軸に、90度散乱光強度を例えば横軸にとり、得られた測定値をプロットすることにより検量線を得ることができる。この検量線に基づいて、90度散乱光強度から可視副流煙量への変換式を求めることもできる。
【0034】
2点比較法による官能検査は、例えば、図3に示す可視副流煙量評価装置を用いて行うことができる。すなわち、2つの左右対称の自然燃焼チャンバ31および32内で標準シガレットCIG1および対象シガレットCIG2を自然燃焼させ、5点という得点を与えた標準シガレットCIG1に対し、対象シガレットCIG2の副流煙量が0〜10点の間の尺度でどの程度に観察されるかという質問形式を採るものである。各チャンバ31、32には、一定の縦方向幅を有する覗き窓311および321が設けられており、各チャンバの上部に可視光源33および34が設けられている。覗き窓311、321の縦方向幅は、本可視副流煙量測定装置の可視光照射ユニット12から照射される可視光ビームの前記高さに相当し、シガレットCIG1、CIG2から覗き窓311、321の下端までの距離は、本可視副流煙量測定装置の可視光照射ユニット12から照射される可視光ビーム下端の喫煙物品SAからの距離に相当することが好ましい。可視光源33および34からの可視光は、上方から副流煙SS1およびSS2に照射され、副流煙SS1、SS2は、それぞれ、覗き窓311および321からのみ観察される。
【0035】
以下本発明を実施例により説明するが、本発明はそれらに限定されるものではない。
【0036】
参考例1
図3に示す可視副流煙量評価装置を用いて10名のパネリストにより、15種のシガレットの可視副流煙量相当値を前述した2点比較法による官能検査で評価し、得られた得点の平均値をそれぞれのシガレットの得点とし、最も高い得点を示したシガレットの可視副流煙量相当値を1と定義して、各シガレットの可視副流煙量相当値を正規化した。他方、図1に示す可視副流煙量測定装置を用いて、同じ15種のシガレットの副流煙量についての90度散乱光強度を電圧(ボルト)として検出し、先の官能検査において1と定義したシガレットの電圧データが1となるように各シガレットの電圧値を正規化した。横軸に正規化された散乱光強度を採り、縦軸に正規化された官能検査による副流煙量相当値を採り、それぞれのデータをプロットしたところ、図4に示すグラフを得た。図4から、本可視副流煙量測定装置により得られる90度散乱光強度は、官能検査による可視副流煙量と非常によく相関していることがわかる。
【0037】
実施例1
パルプ量を30g/m2とし、下記表1に示すように、添加量を変化させて炭酸カルシウムを配合し、クエン酸カリウムをほぼ4.5質量%添加した巻紙を製造した。ここで使用したパルプは亜麻パルプで、使用した炭酸カルシウムは通常用いられるカルサイト型紡錘形炭酸カルシウム(粒子径3.0μm)である。得られた巻紙を用いてシガレットを作成した。シガレットのサイズは通常FKサイズといわれる円周24.9mm、巻き長さ59mm、フィルター長25mm、チップペーパー長さ32mmであった。使用した刻みは通常の市販品で用いられるアメリカン・ブレンドタイプで、填充量は0.580g/本である。これらのシガレットは22℃60%相対湿度で調和後、1本当り重量で0.885±0.01gで重量選別した後に試験に供した。
【0038】
選別した各シガレットについて、燃焼長49mmで自然燃焼させ、フィッシュテール法により測定した燃焼時間、1本当りの副流煙量および時間当りの副流煙量を表1に併記する。また、1本当りの副流煙量については図5にも示した。また、各シガレットについて可視副流煙量を図2に示す装置を用いて測定し、結果を表1に併記するとともに、図6にも示した。これらの結果から、フィッシュテール法による時間当りの副流煙量は、炭酸カルシウムが少ない場合は1本当りの副流煙量が多い(図5)が燃焼時間が顕著に長いために少なく、炭酸カルシウムが多い場合は燃焼時間が短いが1本当りの副流煙量が顕著に少ないため(図5)に少なくなるが、顕著に変化するものではない。一方、可視副流煙量は図6に示すように、炭酸カルシウムを30g/m2以上巻紙に含有させることにより急激に低下することが分かる。
【0039】
【表1】

Figure 0003897700
実施例2
実施例1において可視副流煙量が顕著に低減していることが確認された炭酸カルシウム35g/m2の巻紙に、下記表2に示すように添加量を変化させてクエン酸カリウムを添加した巻紙を作成した。他の条件は実施例1と同じである。フィッシュテール法により測定した燃焼時間、1本当りの副流煙量および時間当りの副流煙量を表2に併記する。また、1本当りの副流煙量については図7にも示した。また、各シガレットについて可視副流煙量を図2に示す装置を用いて測定し、結果を表2に併記するとともに、図8にも示した。これらの結果から、フィッシュテール法による時間当りの副流煙量は、クエン酸カリウム量が少ない場合は燃焼時間が長いが1本当りの副流煙量が顕著に多い(図7)ため多いが、クエン酸カリウム量を増加すると燃焼時間が短くなるが1本当りの副流煙量が顕著に減少する(図7)ため少なくなるが、減少率は顕著ではない。しかしながら、可視副流煙量は、図8に示すように、クエン酸カリウムを3%以上巻紙に含有させることにより顕著に低下することが分かる。
【0040】
【表2】
Figure 0003897700
実施例3
実施例1において可視副流煙量が顕著に低減していることが確認された炭酸カルシウム30g/m2 の巻紙に、下記表3に示すように添加量を変化させてクエン酸カリウムを添加した巻紙を作成した。他の条件は実施例1と同じである。フィッシュテール法により測定した燃焼時間、1本当りの副流煙量および時間当りの副流煙量を表3に併記する。また、1本当りの副流煙量については図9にも示した。また、各シガレットについて可視副流煙量を図2に示す装置を用いて測定し、結果を表3に併記するとともに、図10にも示した。これらの結果から、フィッシュテール法による時間当りの副流煙量は、クエン酸カリウム量が少ない場合は燃焼時間が長いが1本当りの副流煙量が顕著に多い(図9)ため多いが、クエン酸カリウム量を増加するに従って燃焼時間が短くなるが1本当りの副流煙量が顕著に減少する(図9)ため少なくなるが、減少率は大きくない。これに対し、可視副流煙量は、図10に示すように、クエン酸カリウムを巻紙に3%以上含有させることにより顕著に低下することが分かる。
【0041】
【表3】
Figure 0003897700
参考例2
下記表4に示す全灰分となるような巻紙A〜Cを製造した。
【0042】
巻紙Aは木材パルプに填料として炭酸カルシウムが添加され、ワイヤーパートの一部をツインワイヤー化した長網抄紙機で製造した巻紙である。また、巻紙Bは巻紙Aよりも炭酸カルシウムの添加量を更に多くした以外は巻紙Aと同様に製造した巻紙である。なお、巻紙Cは通常の長網抄紙機で炭酸カルシウム含有量が巻紙Aと同様になるよう製造した巻紙である。表面層および試料全体の灰分の測定結果を表4に示した。
【0043】
【表4】
Figure 0003897700
ワイヤーパートの一部をツインワイヤー化した長網抄紙機で製造された巻紙Aおよび巻紙Bではシガレット製造上の問題は発生しなかった。ところが表面付近の灰分が35%を越える巻紙Cではシガレット製造時に紙表面から填料の脱落が多量に発生し、脱落した紙粉が粉塵となることやシガレットのラップ不良を起こすなどのため製造が困難であった。従って、表面層の灰分が35%を越える巻紙はシガレット製造上の適性の低いことが明らかとなった。
【0044】
以上述べたように、本発明によれば、喫煙物品の目視観察による副流煙量を有意に低減させ得る喫煙物品用巻紙が提供される。
【図面の簡単な説明】
【図1】 本発明の喫煙物品の可視副流煙量を測定する装置を示す概略斜視図。
【図2】 本発明の喫煙物品の可視副流煙量を測定する装置の構成を概略的に示すブロック図。
【図3】 官能検査に使用し得る可視副流煙量評価装置を示す概略図。
【図4】 目視による可視副流煙量と図1に示す可視副流煙量測定装置による検出値との関係を示すグラフ。
【図5】 実施例1の巻紙により巻装したシガレットのフィッシュテール法による副流煙量の測定結果を示すグラフ。
【図6】 以後詳述する実施例1の巻紙により巻装したシガレットの図1に示す装置による可視副流煙量の測定結果を示すグラフ。
【図7】 実施例2の巻紙により巻装したシガレットのフィッシュテール法による副流煙量の測定結果を示すグラフ。
【図8】 実施例2の巻紙により巻装したシガレットの図1に示す装置による可視副流煙量の測定結果を示すグラフ。
【図9】 実施例3の巻紙により巻装したシガレットのフィッシュテール法による副流煙量の測定結果を示すグラフ。
【図10】 実施例3の巻紙により巻装したシガレットの図1に示す装置による可視副流煙量の測定結果を示すグラフ。
【符号の説明】
11…自然燃焼室
11a〜11d…自然燃焼室の側壁
112〜115…通気窓
116〜118…可視光透過窓
12…可視光ビーム照射ユニット(手段)
13…可視光吸収ユニット
14…90度散乱光強度検出ユニット(手段)
15…排気フード
20…変換テーブル手段
SA…喫煙物品
SSS…副流煙
VLB…可視光ビーム
SVL…90度散乱光[0001]
BACKGROUND OF THE INVENTION
The present invention relates to wrapping paper for smoking articles that reduces the amount of tobacco visible sidestream smoke.
[0002]
[Prior art]
In recent years, low sidestream smoke cigarettes with low sidestream smoke generation have been developed. Whether or not such cigarettes actually generate a small amount of sidestream smoke is usually determined by the so-called fishtail method. The fishtail method is described in JP-A-10-81 and the like with reference to the drawings. Briefly, the fishtail method uses a smoke chamber having a fishtail-shaped open lower end. A Cambridge filter (44 mm diameter) is attached to the top of the smoke chamber. While sucking air from the upper end of the smoke chamber at a rate of 3 liters / minute, the cigarette is naturally burned for a predetermined length at the lower end of the smoke chamber. The particulate matter in the sidestream smoke generated at this time is attached to the Cambridge filter and the inner wall of the smoke chamber, and their mass is measured. That is, the mass obtained by subtracting the mass of the original Cambridge filter from the mass of the Cambridge filter that captured the particulate matter is determined first. Next, the particulate matter adhering to the Cambridge filter and the inner wall of the smoke chamber was extracted with a solvent, and the absorbance was measured. The ratio of the obtained absorbances and the mass of the particulate matter adhering to the Cambridge filter previously calculated. From the value of (subtracted), the mass of the particulate matter adhering to the inner wall of the smoke chamber is calculated. The value obtained by adding the mass of the particulate matter adhering on the Cambridge filter and the mass of the particulate matter adhering to the inner wall of the smoke chamber thus obtained is the amount of sidestream smoke (mg / cig) per cigarette. And Also, in this method, the time required for spontaneous combustion of a predetermined length is measured, and the value obtained by dividing the amount of sidestream smoke per bottle by this measured time is the amount of sidestream smoke (mg / min). ). The resulting sidestream smoke volume per hour has been considered to approximate the apparent sidestream smoke volume in the development of conventional low sidestream smoke cigarettes.
[0003]
There has also been proposed an apparatus that continuously or instantaneously measures the amount of sidestream smoke of a cigarette by an optical method without using mass measurement (Japanese Patent Laid-Open No. 3-120444). This optical device irradiates a light beam so as to transmit sidestream smoke generated from a cigarette burned in a combustion chamber, and measures the intensity of the light beam transmitted through the sidestream smoke. This measured luminous intensity corresponds to the concentration of sidestream smoke and thus reflects the amount of total particulate matter.
[0004]
However, among cigarettes that are evaluated by the mass of all particulate matter as in the fishtail method and the amount of sidestream smoke is as low as that, there is a difference in sidestream smoke when actually observed when smoking. It was found that the amount of sidestream smoke due to the mass of the whole particulate matter does not necessarily correlate with the amount of sidestream smoke by visual observation. Since the sidestream smoke amount measured optically also corresponds to the sidestream smoke density, it can be said that it does not necessarily correlate with the sidestream smoke amount by visual observation.
[0005]
It can be said that a smoking article such as cigarette not only has a low mass of all particulate matter, but also has a small amount of sidestream smoke by actual visual observation.
[0006]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a smoking article wrapping paper that can reduce the amount of sidestream smoke (also referred to as “visible sidestream smoke” in the present specification) by visual observation.
[0007]
[Means for Solving the Problems]
As a result of earnest research to achieve the above-mentioned object, the present inventor greatly reduces the amount of visible sidestream smoke by adding calcium carbonate to the wrapping paper in a specific amount and a specific amount of a combustion regulator. I found out that I can do it. The present invention is based on this finding.
[0008]
That is, the present invention provides 30 g / m of calcium carbonate in the wrapping paper 2 As mentioned above, containing a combustion regulator in a proportion of 3% by mass or more, During ~ of While maintaining the amount of calcium carbonate, the top side surface layer and Bottom side surface layer Reduced the amount of calcium carbonate A wrapping paper for smoking articles that reduces the amount of visible sidestream smoke of tobacco is provided.
[0009]
In the present invention, the combustion regulator is preferably selected from the group consisting of potassium citrate and sodium citrate.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail.
[0011]
The pulp used for the wrapping paper for smoking articles of the present invention is composed of flax pulp, wood pulp and the like used for ordinary smoking article (especially cigarette) wrapping paper. The amount of the pulp is practically sufficient to maintain the strength required for papermaking or cigarette winding, and preferably 20 to 50 g / m. 2 It is.
[0012]
The wrapping paper for smoking articles of the present invention is one in which calcium carbonate is contained in a specific amount or more in the pulp and a combustion modifier is added in a specific proportion or more. Calcium carbonate is 30g / m 2 50 g / m 2 It mix | blends with the following quantity, and a combustion regulator is mix | blended in the ratio of 3-15 mass% or more in a wrapper. The amount of calcium carbonate is 30 g / m 2 If the ratio is less than 3% and / or the ratio of the combustion modifier is less than 3% by mass, the effect of reducing the amount of visible sidestream smoke is not sufficiently exhibited.
[0013]
Calcium carbonate is added in the form of particles, and the particle size can be appropriately selected from the viewpoints of cost and ease of papermaking, but is preferably 0.02 μm to 10 μm.
[0014]
Wrapping paper is 50 g / m 2 ~ 100g / m 2 It is preferable to have a basis weight of
[0015]
As the combustion control agent, alkali metal citrate is preferably used, and potassium citrate and sodium citrate are particularly preferable, and these can be used alone or in combination.
[0016]
By the way, the filler-added paper manufactured by the long paper machine has less filler on the wire side than the felt side due to the dehydration from the wire side at the time of paper layer formation. The distribution of filler and fiber in the paper is biased, resulting in a paper sheet with duality. This duality may be a disadvantage in terms of print quality and paper characteristics in the field of printing paper, but with conventional wrapping paper, this duality is preferable in terms of ash convergence during cigarette combustion. The impact of is hardly a problem.
[0017]
However, when a wrapping paper containing a very large amount of filler as in the present invention is produced by a conventional long web paper machine, the filler contained in a large amount on the felt side surface falls off during cigarette production, and there is a paper dust trouble or a wrap defect. Such a problem is likely to occur and becomes a factor that hinders cigarette production at high speed.
[0018]
In order to solve the above problem, it is necessary to reduce only the filler distributed near the surface while maintaining the amount of filler in the paper contained in the wrapping paper. As a means for reducing only the filler distributed near the surface while maintaining the amount of filler in the paper contained in the wrapping paper, there is a paper machine for forming a paper layer by a double-side dewatering type wire part. Double-sided dewatering type wire part is a twin wire type wire part. A wire part called a so-called on-top type wire or a hybrid type wire, which is a twin wire machine and part of a long net paper machine. The paper machine provided. In a general long paper machine, dewatering at the time of paper layer formation is performed only on the wire side, but in the twin-wire type, the paper layer is formed by dewatering from the two wires that touch the top and bottom of the papermaking material. The filler content on the surface of the wrapping paper can be reduced. In the web manufactured by a general paper machine, the felt surface has the highest filler content and gradually decreases toward the wire surface. The difference in the filler content of the surface layer is small, and the difference between the filler content of the entire paper layer and the filler content of each layer is quite small. In the present invention, a portion corresponding to 18 to 20% by mass of the total mass in the thickness direction from the surface of the wrapping paper is defined as a surface layer, and the ash content is expressed as the ash content of the surface layer. In addition, the two front and back surfaces of the web are generally manufactured on a conventional long net paper machine, and each is manufactured on a felt side, a wire side, and a twin wire type paper machine. In the present invention, the felt side and the top wire side are referred to as the top side, and the wire side and the bottom wire side are referred to as the bottom side. In the present invention, the ash content of at least one surface layer on the top side and the bottom side of the wrapping paper is preferably 35% by mass or less, and the ash content of the surface layer on the top side and the bottom side of the wrapping paper is both 35% by mass. More preferably, it is as follows.
[0019]
Here, as for the ash content of the surface layer, the wrapping paper sample is divided several times in the thickness direction, and the ash content of the surface layer corresponding to 18 to 20% by mass of the total mass in the thickness direction from the surface of the sample is defined in JIS P 8128. It can be calculated according to this. The outline is as follows.
[0020]
A 40 mm × 200 mm sample is taken from the paper and the mass is measured. Adhesive tape (width 50 mm, tesa # 4267) is bonded to the surface of the sample so that there is no air layer from end to end of the sample, and after cutting off the adhesive tape protruding from the sample, from above the adhesive tape Apply a load and make good contact. The mass of the adhesive tape is again measured to determine the mass of the adhesive tape. Next, an adhesive tape is bonded to the opposite surface of the sample, and the sample sandwiched between the adhesive tapes is divided into two parts by using the adhesive force of the adhesive tape. The division is T-shaped peeling, that is, a sample sandwiched between adhesive tapes is made vertical and slowly peeled horizontally at a constant speed. The same procedure is repeated by attaching the adhesive tape to the peeled surface of the first peeled sample again until the surface layer has a mass of 18 to 20% by mass of the original sample. The obtained surface layer is collectively heated at 900 ° C. together with the adhesive tape at 10 points per sample, the ash content is determined according to JIS P 8128, corrected with the ash content of the adhesive tape, and expressed as the ash value of the surface layer. Separately from this, the ash content of the sample before being divided is expressed as a total ash value.
[0021]
The wrapping paper for smoking articles (particularly cigarettes) of the present invention greatly reduces the amount of tobacco visible sidestream smoke compared to conventional wrapping paper. Although the measurement of the visible sidestream smoke amount can be performed by a sensory test, it can be conveniently performed using the visible sidestream smoke amount measuring device disclosed in Japanese Patent Application No. 2000-268910.
[0022]
FIG. 1 is a schematic perspective view showing a visible sidestream smoke amount measuring device disclosed in Japanese Patent Application No. 2000-268910, and FIG. 2 is a block diagram schematically showing the configuration of the visible sidestream smoke amount measuring device. is there.
[0023]
As shown in FIGS. 1 and 2, the visible sidestream smoke amount measuring device 10 is generated by the natural combustion chamber 11 of the smoking article and the natural combustion of the smoking article and rises naturally in the natural combustion chamber 11 (increase). And a visible light irradiation unit 12 for irradiating a predetermined visible light beam in a direction substantially orthogonal to the flow direction of the sidestream smoke, and substantially orthogonal to the direction of the visible light beam by the sidestream smoke. A scattered light intensity detection unit 14 is provided for detecting the intensity of scattered light scattered in the direction as an indicator of the amount of visible sidestream smoke.
[0024]
The natural combustion chamber 11 is made of a light-shielding material, and is formed of, for example, a rectangular parallelepiped cylinder that is long in the vertical direction defined by the four side walls 11a to 11d. A smoking article insertion port 111 for inserting a smoking article SA such as an ignited cigarette into the natural combustion chamber 11 is provided at the lower portion of the one side wall 11a. The bottom end of each of the four side walls 11a to 11d defining the natural combustion chamber 11 is ventilated such as a mesh window so that air required for natural combustion of the smoking article SA can be supplied into the natural combustion chamber 11. Windows 112-115 are provided. The insertion port 111 of the smoking article is external air in which the sidestream smoke SSS from the smoking article SA charged into the natural combustion chamber 11 through the insertion port 111 enters the natural combustion chamber 11 through the ventilation windows 112 to 115. It is preferable that the distance from the smoking article SA to the upper end of the natural combustion chamber 11 is set to a position where the sidestream smoke SSS does not fluctuate substantially.
[0025]
In the bottom space of the natural combustion chamber 11 surrounded by the ventilation windows 112 to 115, glass beads (not shown) are provided so as not to disturb the flow of sidestream smoke SSS rising in the natural combustion chamber 11 due to natural combustion of smoking articles. It can be filled to form an air flow rectifying layer. The upper end of the natural combustion chamber 11 is open. An exhaust hood 15 can be installed at the open end to exhaust the natural combustion chamber 11. It is necessary to exhaust the natural combustion chamber 11 to such an extent that it does not substantially affect the natural combustion of the smoking article SA. When exhausting, the rectifying filter 16 crosses the upper open end of the natural combustion chamber 11 so as not to disturb the flow of the sidestream smoke SSS that naturally rises in the natural combustion chamber 11 due to natural combustion of the smoking article. It is preferable to attach. An exhaust duct 151 is provided at the top of the exhaust hood 15, and the exhaust duct 151 is connected to an exhaust system (not shown).
[0026]
The visible light irradiation unit 12 is provided outside the natural combustion chamber 11, and in the example shown in FIG. 1, outside the side wall 11 b facing the side wall 11 a of the natural combustion chamber 11 into which the smoking article SA is inserted. A visible light transmission window 116 is provided on the side wall 11 b facing the visible light irradiation unit 12. The visible light irradiation unit 12 has a visible light source (not shown), and is substantially perpendicular to the flow direction of the sidestream smoke SSS generated by spontaneous combustion of the smoking article SA and rising naturally in the natural combustion chamber 11. Is irradiated with a visible light beam VLB. The visible light source is not particularly limited as long as it emits visible light. For example, a visible light laser, a visible light emitting diode, a halogen lamp, and the like can be used. A light source is used.
[0027]
The visible light beam (visible light beam) VLB emitted from the visible light irradiation unit 12 covers the sidestream smoke SSS rising naturally in the natural combustion chamber 11 even if it slightly fluctuates and radiates visible light. Has a substantial cross section as obtained. For example, the visible light beam VLB has a width w (FIG. 2) in a direction orthogonal to the irradiation direction, and the irradiation direction of the visible light beam VLB so as to match the visual field in the sensory evaluation in consideration of the human visual field. Can have a rectangular cross-section with a height in a direction substantially perpendicular to. The width w is preferably at least equal to the fluctuation width of the visible sidestream smoke SSS in the direction orthogonal to the irradiation direction of the visible light beam. The cross section of the visible light beam is not limited to a rectangle, but may be an ellipse, a circle, or the like. Such shaping of the visible light beam can be performed by a known method such as using a mask having an opening corresponding to the cross section of the visible light beam or using a lens system composed of a combination of a convex lens and a concave lens. it can.
[0028]
Faced with the visible light irradiation unit 12, outside the natural combustion chamber 11, in the example shown in FIG. 1, on the outside of the side wall 11a, the sidestream smoke SSS is emitted from the visible light irradiation unit 12 so as not to affect the measurement. It is preferable to provide a light absorption unit 13 for absorbing and removing all the transmitted light. A visible light transmission window 117 is provided in a portion of the side wall 11 a facing the light absorption unit 13.
[0029]
The scattered light intensity detection unit 14 is provided outside the natural combustion chamber 11 in a direction orthogonal to the direction of the irradiation light beam from the visible light irradiation unit 12, in the example shown in FIG. 1, outside the side wall 11d. A visible light transmitting window 118 is provided in a portion of the side wall 11 d facing the scattered light intensity detection unit 14. As described above, the scattered light intensity detection unit 14 is scattered in the direction substantially orthogonal to the irradiation direction of the visible light beam VLB among the light irradiated on the sidestream smoke SSS and scattered by the sidestream smoke SSS. The intensity of scattered light (hereinafter referred to as 90 degree scattered light) SLV is detected. The scattered light intensity detection unit 14 includes a known optical system (not shown) for collecting the 90-degree scattered light SLV and converts the collected 90-degree scattered light SLV into an electrical signal. It has an optical / electrical conversion device (not shown) for outputting. As the optical / electrical converter, a photomultiplier that converts light into a voltage signal can be preferably used. The converted voltage signal can be sampled by a personal computer after A / D conversion, for example. The data acquisition interval and acquisition time can be arbitrarily set. Typically, 300 points can be measured at intervals of 0.2 seconds in one minute.
[0030]
The intensity of the detected 90-degree scattered light SLV correlates very well with the amount of visible sidestream smoke, and it is determined that the stronger the detected 90-degree scattered light intensity, the greater the amount of visible sidestream smoke. can do. It has been found that the 90-degree scattered light intensity does not correlate with the amount of total particulate matter in the sidestream smoke.
[0031]
Each visible light is between the visible light irradiation unit 12 and the visible light transmission window 116, between the light absorption unit 13 and the visible light transmission window 117, and between the scattered light intensity detection unit 14 and the visible light transmission window 118, respectively. In order to prevent external stray light from entering from the transmission window, it is preferable to install external stray light shielding boxes 17 to 19.
[0032]
Here, when representative examples such as the overall size of the apparatus 10 are shown, the natural combustion chamber 11 is a rectangular parallelepiped having a size of 11 cm × 11 cm and a height of 80 cm, and the smoking article inlet 111 is formed from the lower end of the natural combustion chamber 11. The distance from the smoking article SA to the center of the visible light beam is 10 cm, and the visible light beam emitted from the visible light irradiation unit has a cross section having a size of 5 cm × 5 cm.
[0033]
As shown in FIG. 2, the visible sidestream smoke amount measuring apparatus uses the 90-degree scattered light intensity detected by the scattered light intensity detection unit 14 to correlate the 90-degree scattered light intensity and the visible sidestream smoke amount visually. It is preferable to have conversion table means 20 for converting to a visible sidestream smoke amount and outputting based on the relationship. In the conversion table means, the correlation between the 90-degree scattered light intensity obtained in advance and the visible sidestream smoke amount is input as a conversion equation, a calibration curve, etc., and is output from the scattered light intensity detection unit 14. The 90-degree scattered light intensity signal is converted into a visible sidestream smoke amount and output. In order to obtain the correlation between the 90-degree scattered light intensity and the visible sidestream smoke amount, first, the visible sidestream smoke amount of smoking articles such as many cigarettes is evaluated by a sensory test using a two-point comparison method. Quantify the sidestream smoke. The 90-degree scattered light intensity detected by the apparatus for the same smoking article is measured. A calibration curve can be obtained by plotting the measurement values obtained by taking the visible sidestream smoke amount on the vertical axis and the 90-degree scattered light intensity on the horizontal axis, for example. Based on this calibration curve, a conversion formula from the 90-degree scattered light intensity to the visible sidestream smoke amount can also be obtained.
[0034]
The sensory test by the two-point comparison method can be performed using, for example, a visible sidestream smoke amount evaluation apparatus shown in FIG. That is, the standard cigarette CIG1 and the target cigarette CIG2 are spontaneously burned in the two symmetrical natural combustion chambers 31 and 32, and the sidestream smoke amount of the target cigarette CIG2 is 0 with respect to the standard cigarette CIG1 that is given a score of 5 points The question form of how much is observed on a scale between -10 points is taken. The chambers 31 and 32 are provided with viewing windows 311 and 321 having a certain vertical width, and visible light sources 33 and 34 are provided above the chambers. The vertical widths of the observation windows 311 and 321 correspond to the height of the visible light beam emitted from the visible light irradiation unit 12 of the visible sidestream smoke amount measuring apparatus, and the observation windows 311 and 321 from the cigarettes CIG1 and CIG2. It is preferable that the distance to the lower end corresponds to the distance from the smoking article SA at the lower end of the visible light beam irradiated from the visible light irradiation unit 12 of the visible sidestream smoke amount measuring apparatus. Visible light from the visible light sources 33 and 34 is applied to the sidestream smoke SS1 and SS2 from above, and the sidestream smoke SS1 and SS2 are observed only from the viewing windows 311 and 321, respectively.
[0035]
Hereinafter, the present invention will be described by way of examples, but the present invention is not limited thereto.
[0036]
Reference example 1
By using the visible sidestream smoke amount evaluation apparatus shown in FIG. 3, the panelists of 10 persons evaluated the values corresponding to the amount of visible sidestream smoke of 15 kinds of cigarettes by the sensory test by the two-point comparison method described above, and the obtained score The average value of each cigarette was defined as the score of each cigarette, the visible sidestream smoke amount equivalent value of the cigarette showing the highest score was defined as 1, and the visible sidestream smoke amount equivalent value of each cigarette was normalized. On the other hand, using the visible sidestream smoke amount measuring apparatus shown in FIG. 1, the 90-degree scattered light intensity for the sidestream smoke amount of the same 15 types of cigarettes is detected as a voltage (volt). The voltage value of each cigarette was normalized so that the voltage data of the defined cigarette was 1. When the normalized scattered light intensity is taken on the horizontal axis, the sidestream smoke amount equivalent value by the normalized sensory test is taken on the vertical axis, and the respective data are plotted, the graph shown in FIG. 4 is obtained. FIG. 4 shows that the 90-degree scattered light intensity obtained by the visible sidestream smoke amount measuring apparatus correlates very well with the visible sidestream smoke amount obtained by the sensory test.
[0037]
Example 1
Pulp amount 30g / m 2 As shown in Table 1 below, a wrapping paper was manufactured in which the addition amount was changed and calcium carbonate was blended, and about 4.5% by mass of potassium citrate was added. The pulp used here is flax pulp, and the calcium carbonate used is calcite spindle-shaped calcium carbonate (particle diameter: 3.0 μm) which is usually used. A cigarette was prepared using the obtained wrapping paper. The size of the cigarette was a circumference of 24.9 mm, commonly referred to as FK size, a winding length of 59 mm, a filter length of 25 mm, and a chip paper length of 32 mm. The increment used is an American blend type used in ordinary commercial products, and the filling amount is 0.580 g / book. These cigarettes were conditioned at 22 ° C. and 60% relative humidity, and subjected to testing after weight selection at 0.885 ± 0.01 g per piece.
[0038]
Each selected cigarette is naturally burned at a combustion length of 49 mm, and the combustion time, the amount of sidestream smoke per bottle, and the amount of sidestream smoke per hour are shown in Table 1. The amount of sidestream smoke per bottle is also shown in FIG. Moreover, the amount of visible sidestream smoke was measured for each cigarette using the apparatus shown in FIG. 2, and the results are shown in Table 1 and also shown in FIG. From these results, the amount of sidestream smoke per hour according to the fishtail method is small when the amount of calcium carbonate is small, but the amount of sidestream smoke per bottle is large (Fig. 5) because the combustion time is remarkably long. When the amount of calcium is large, the combustion time is short, but the amount of sidestream smoke per bottle is remarkably small (FIG. 5), but it does not change significantly. On the other hand, the amount of visible sidestream smoke is 30 g / m2 of calcium carbonate as shown in FIG. 2 It turns out that it falls rapidly by making it contain in a wrapping paper above.
[0039]
[Table 1]
Figure 0003897700
Example 2
In Example 1, it was confirmed that the amount of visible sidestream smoke was significantly reduced 35 g / m of calcium carbonate. 2 As shown in Table 2 below, the amount of addition was changed to make a wrapping paper to which potassium citrate was added. Other conditions are the same as those in Example 1. The combustion time measured by the fishtail method, the amount of sidestream smoke per bottle and the amount of sidestream smoke per hour are also shown in Table 2. The amount of sidestream smoke per bottle is also shown in FIG. Further, the amount of visible sidestream smoke was measured for each cigarette using the apparatus shown in FIG. 2, and the results are shown in Table 2 and also shown in FIG. From these results, the amount of sidestream smoke by the fishtail method is large because the combustion time is long when the amount of potassium citrate is small, but the amount of sidestream smoke per bottle is significantly large (FIG. 7). When the amount of potassium citrate is increased, the combustion time is shortened, but the amount of sidestream smoke per bottle is significantly reduced (FIG. 7), but the rate of reduction is not significant. However, it can be seen that the amount of visible sidestream smoke is significantly reduced by containing 3% or more of potassium citrate in the paper as shown in FIG.
[0040]
[Table 2]
Figure 0003897700
Example 3
In Example 1, it was confirmed that the amount of visible sidestream smoke was remarkably reduced. Calcium carbonate 30 g / m 2 As shown in Table 3 below, the amount of addition was changed to make a wrapping paper to which potassium citrate was added. Other conditions are the same as those in Example 1. Table 3 shows the combustion time, the amount of sidestream smoke per bottle, and the amount of sidestream smoke per hour measured by the fishtail method. The amount of sidestream smoke per bottle is also shown in FIG. Further, the amount of visible sidestream smoke was measured for each cigarette using the apparatus shown in FIG. 2, and the results are shown in Table 3 and also shown in FIG. From these results, the amount of sidestream smoke by the fishtail method is large because the combustion time is long when the amount of potassium citrate is small, but the amount of sidestream smoke per bottle is significantly large (FIG. 9). As the amount of potassium citrate is increased, the combustion time is shortened, but the amount of sidestream smoke per bottle is remarkably reduced (FIG. 9), but the rate of reduction is not large. On the other hand, as shown in FIG. 10, it can be seen that the amount of visible sidestream smoke is significantly reduced by containing 3% or more of potassium citrate in the wrapping paper.
[0041]
[Table 3]
Figure 0003897700
Reference example 2
Wrapping papers A to C having total ash content shown in Table 4 below were produced.
[0042]
The wrapping paper A is a wrapping paper manufactured by a long paper machine in which calcium carbonate is added as a filler to wood pulp and a part of the wire part is made into a twin wire. Further, the wrapping paper B is a wrapping paper manufactured in the same manner as the wrapping paper A except that the addition amount of calcium carbonate is further increased than that of the wrapping paper A. Note that the wrapping paper C is a wrapping paper manufactured with a normal long paper machine so that the calcium carbonate content is the same as that of the wrapping paper A. Table 4 shows the measurement results of the ash content of the surface layer and the entire sample.
[0043]
[Table 4]
Figure 0003897700
There was no problem in cigarette production in the wrapping paper A and the wrapping paper B manufactured by the long web paper machine in which a part of the wire part was twin-wired. However, with the wrapping paper C where the ash content in the vicinity of the surface exceeds 35%, it is difficult to manufacture the cigarette because a large amount of the filler is removed from the paper surface during the cigarette production, and the paper dust that has fallen becomes dust or causes a cigarette wrap failure. Met. Therefore, it has been clarified that a wrapping paper having an ash content of more than 35% in the surface layer has low suitability for producing cigarettes.
[0044]
As described above, according to the present invention, a wrapping paper for a smoking article that can significantly reduce the amount of sidestream smoke by visual observation of the smoking article is provided.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an apparatus for measuring a visible sidestream smoke amount of a smoking article of the present invention.
FIG. 2 is a block diagram schematically showing the configuration of an apparatus for measuring the amount of visible sidestream smoke of a smoking article according to the present invention.
FIG. 3 is a schematic diagram showing a visible sidestream smoke quantity evaluation apparatus that can be used for sensory testing.
4 is a graph showing a relationship between a visible sidestream smoke amount visually and a detection value obtained by the visible sidestream smoke amount measuring apparatus shown in FIG. 1;
FIG. 5 is a graph showing the measurement result of the sidestream smoke amount by the fishtail method of cigarettes wound with the wrapping paper of Example 1.
6 is a graph showing the measurement result of the amount of visible sidestream smoke by the apparatus shown in FIG. 1 of the cigarette wound with the wrapping paper of Example 1 described in detail below.
7 is a graph showing measurement results of sidestream smoke by the fishtail method of cigarettes wound with the wrapping paper of Example 2. FIG.
8 is a graph showing the measurement result of the amount of visible sidestream smoke by the apparatus shown in FIG. 1 of the cigarette wound with the wrapping paper of Example 2. FIG.
FIG. 9 is a graph showing the measurement result of the amount of sidestream smoke by the fishtail method of cigarettes wound with the wrapping paper of Example 3.
10 is a graph showing the measurement result of the amount of visible sidestream smoke by the apparatus shown in FIG. 1 of the cigarette wound with the wrapping paper of Example 3. FIG.
[Explanation of symbols]
11 ... Natural combustion chamber
11a-11d ... Side wall of natural combustion chamber
112-115 ... Ventilation window
116-118 ... Visible light transmission window
12. Visible light beam irradiation unit (means)
13 ... Visible light absorption unit
14 ... 90 degree scattered light intensity detection unit (means)
15 ... exhaust hood
20: Conversion table means
SA ... Smoking article
SSS ... Sidestream smoke
VLB ... Visible light beam
SVL ... 90 degree scattered light

Claims (4)

巻紙中に炭酸カルシウムを30g/m2 以上、燃焼調節剤を3質量%以上の割合で含有し、巻紙前記炭酸カルシウム量を保持したままトップサイドの表面層とボトムサイドの表面層の炭酸カルシウム量を少なくしたことを特徴とするタバコ可視副流煙量を低減させる喫煙物品用巻紙。Calcium carbonate is contained in the wrapping paper at a rate of 30 g / m 2 or more and a combustion regulator in a proportion of 3% by mass or more, and the top side surface layer and the bottom side surface layer are carbonated while maintaining the amount of calcium carbonate in the wrapping paper. A wrapping paper for smoking articles which reduces the amount of visible sidestream smoke of tobacco, characterized in that the amount of calcium is reduced. 炭酸カルシウムが、巻紙中に30g/m2 以上、50g/m2 以下の量で含有される請求項1に記載の巻紙。The wrapping paper according to claim 1, wherein the calcium carbonate is contained in the wrapping paper in an amount of 30 g / m 2 or more and 50 g / m 2 or less. 燃焼調節剤が、巻紙中に3〜15質量%の割合で含有される請求項1または2に記載の巻紙。  The wrapping paper according to claim 1 or 2, wherein the combustion regulator is contained in the wrapping paper in a proportion of 3 to 15% by mass. 燃焼調節剤が、クエン酸カリウムおよびクエン酸ナトリウムからなる群の中から選ばれる請求項1ないし3のいずれか1項に記載の巻紙。  The wrapping paper according to any one of claims 1 to 3, wherein the combustion regulator is selected from the group consisting of potassium citrate and sodium citrate.
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EP1403432A1 (en) 2004-03-31
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RU2264765C2 (en) 2005-11-27
CA2447597A1 (en) 2002-11-21
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CN1287048C (en) 2006-11-29
US20040094174A1 (en) 2004-05-20
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EP1403432B1 (en) 2011-12-14
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WO2002092913A1 (en) 2002-11-21
EP1403432A4 (en) 2009-12-23
PT1403432E (en) 2012-02-09

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