201103449 六、發明說明： 【發明所屬之技術領域】 本發明提廣一種具有低旁流煙捲菸紙及一氧化碳對焦 油比小於或等於1之煙品。 【先前技術】 在一些管轄區域中，有規定香煙之最大一氧化碳、焦 油及尼古丁產量之規則。 已知提供具有低滲透性之捲菸紙的香煙及其它煙品， 以便減少在其吸煙期間所產生之旁流煙（sidestream smoke)。然而，雖然有利地減少旁流煙，但是包含低滲透 性捲菸紙卻可能不利地增加一氧化碳產量，並因此增加此 種煙品所產生之旁流煙的一氧化碳對焦油比。 雖然可以使用通風來減少一氧化碳及焦油釋放，但是 高等級通風會不利地造成不可接受之低等級的耐吸性 (resistance to draw, RTD)。然而，當通風減少氣相及微粒 相釋放時，它對一氧化碳對焦油比影響很小。 可以包含例如一個或多個高密度醋酸纖維素濾嘴段， 以增加具有低滲透性捲菸紙之煙品的總RTD及高等級通風 至一可接收等級。然而，高密度醋酸纖維素濾嘴部分通常 減少焦油釋放，同時對一氧化碳釋放有很小或沒有影響。 因此，期望提供一種具有低旁流煙捲菸紙及一氧化碳 對焦油比小於或等於1之煙品。 【發明內容】 -4- 201103449 依據本發明’提供一種煙品’其包括：一可吸煙材料 桿；以及一濾嘴，包括一附著至該可吸煙材料桿之限流元 件，該限流元件包括：一第一上游整體管狀部；一第二下 游整體管狀部，具有大致相同於該第一管狀部之外徑；以 及一第三中間整體管狀部，位於該第一與第二管狀部間， 該第三管狀部相較於該第一及第二管狀部具有縮小的外 徑。在一第一上游空腔與一第二下游空腔間配置一在其中 設置有至少一孔之橫向阻擋部，其中該第一上游空腔係至 少部分由該第一管狀部之內周圍所界定，以及第二下游空 腔係至少部分由該第二管狀部之內周圍所界定。在一沿著 該濾嘴之位置上設置一與該第二空腔相通之通風區。 依據本發明，進一步提供一種在依據本發明之一煙品 中所包含之限流元件，該限元件包括：一第一整體管狀 部；一第二整體管狀部，具有大致相同於該第一管狀部之 外徑；一第三中間整體管狀部，位於該第一與第二管狀部 間’該第三管狀部相較於該第一及第二管狀部具有縮小的 外徑；一橫向阻擋部，在其中設置有至少一孔及配置在一 第一空腔與一第二空腔間，其中該第一空腔係至少部分由 該第一管狀部之內周圍所界定及第二空腔係至少部分由該 第二管狀部之內周圍所界定；以及一或多個開口，位於該 第二或第三管狀部之一表面中與該第二空腔相通。 依據本發明，亦提供一種用於一煙品之濾嘴，其包括 依據本發明之一限流元件。 201103449 遍及該說明書，術語「上游」及「下游」係用以描述 本發明之煙品的組件相對於在其吸煙期間從該可吸煙材料 桿經由該濾嘴所抽吸之主流煙的方向之相對位置。 —包括具有上面所明確說明之結構的一限流元件及通 風區之濾嘴的包含能有利地製造具有一期望RTD之依據本 發明的高通風煙品，其中使該主流煙之一氧化碳對焦油比 維持在一可接受數値。如下面所更詳細描述，甚至當該煙 品之可吸煙材料桿包括一低旁流煙捲菸紙時，亦確實如此。 可以使用現有濾嘴結合及香煙製造設備而不需有重大 修改，以有利地製造具有濾嘴（該等濾嘴包括一具有上面所 明確說明之結構的限流元件）之依據本發明的煙品。由於它 的形狀，該限流元件係有彈力的及在依據本發明之濾嘴及 煙品的製造期間（特別是在使依據本發明之濾嘴附著至可 吸煙材料桿，以便製造依據本發明之煙品的製程期間）可被 壓縮。此使用現有濾嘴結合及香煙製造設備有利地協助依 據本發明之濾嘴及煙品的製造。 該限流元件之第三管狀部相較於其第一及第二管狀部 具有縮小外徑，此有利地在該濾嘴之周圍與該第三管狀部 之外表間建立一通風區。同時，該限流元件之第一及第二 管狀部相較於該第三管狀部具有大的外徑，此有利地提供 強化，以致於當例如在消費者手指中夾持該煙品時，該濾 嘴不會坍塌。 該限流元件之第一上游空腔有利地允許在使用中，經 201103449 由該可吸煙材料桿所抽吸之主流煙在進一步向下游被抽吸 穿過該橫向阻擋部中之至少一孔前，集中在該至少一孔的 周圍。此外，該第一上游空腔在吸煙期間協助防止該至少 一孔之堵塞。 可以選擇在該橫向阻擋部中所提供之孔的數目及其尺 寸，以便達成一期望RTD及一氧化碳對焦油比。較佳地， 該橫向阻擋部包括一單孔，更佳的是一大致中心單孔。在 該橫向阻擋部包括一大致中心單孔之情況下，該孔的直徑 較佳的是在約0.4mm至約0.8mm間，更佳的是約0.6mme 較佳地，該至少一孔的長度係在約 0.2mm至約1mm 間，更佳的是約0.7 mm。遍及該說明書，術語「長度」係 用以表示在該煙品之縱向上的尺寸。該至少一孔之長度等 於該橫向阻擋部之厚度。 較佳地，按照一定尺寸來製造該至少一孔，以提供充 分壓力降，以致於該煙品具有在約30mm WG(水標尺）至約 120mmWG間之RTD，更佳的是至少約40mmWG。 該不透煙橫向阻擋部可以是任何合適形狀。例如，該 橫向阻擋部可以大致垂直於該煙品之縱軸。在另一情況 中，該橫向阻擋部相對於從該可吸煙材料桿經由該濾嘴所 抽吸之主流煙的方向可以是錐台的及收歛的或發散的。在 又另一實施例中，該橫向阻擋部相對於從該可吸煙材料桿 經由該濾嘴所抽吸之主流煙的方向可以是凹面或凸面的。 較佳地，該橫向阻擋部相對於從該可吸煙材料桿經由該濾 201103449 嘴所抽吸之主流煙的方向可以是凹面的。此有利地在依據 本發明之濾嘴及煙品的製造期間（特別是在使依據本發明 之濾嘴附著至可吸煙材料桿，以便製造依據本發明之煙品 的製程期間）緩和該限流元件之壓縮。 該限流元件之第二下游空腔有利地允許經由該橫向阻 擋部中所設置之一或多個孔所抽吸之主流煙在被吸入消費 者口中前與經由該通風區所吸入之空氣混合。、 該通風區在該瀘嘴之限流元件的第二空腔中（亦即，在 位於該限流元件之橫向阻擋部中的至少一孔之下游的位置 上）提供從該可吸煙材料桿所抽吸之主流煙的流通空氣。較 佳地，在該橫向阻擋部之至少一孔的上游沒有提供流通空 氣。流通空氣只在該至少一孔之下游處提供，有利地限制 在吸煙期間消費者可能企圖猛抽該煙品之程度。相較於在 一包括一傳統醋酸纖維素絲束濾嘴之煙品中，當吸煙之流 速增加時，該限流元件上之壓降更快速地增加。因此，在 吸煙期間猛抽之消費者導致主流煙之流通空氣的增加，而 不是增加主流煙之釋放。再者，流通空氣只在該限流元件 之橫向壁的至少一孔之下游處提供，有利地分開該通風區 與至少一孔之功能（分別是通風等級與RTD)。 較佳地，藉一大致不透氣煙嘴紙帶使該濾嘴附著至該 可吸煙材料桿。較佳地，該通風區包括經由該煙嘴紙之一 部分所設置之至少一排周圍穿孔，更佳的是經由該煙嘴紙 之位於該限流元件之第三管狀部上的部分所設置之至少一 201103449 排周圍穿孔。 較佳地，該至少一排周圍穿孔係位於離該煙 有至少1 2 m m處。 可以在該煙品製成前或期間，使用傳統技術 煙嘴紙中之穿孔。例如，可以使用線上雷射打 laser perforation)、機械打孔或靜電打孔產生在該 之穿孔。較佳地，預先打孔該煙嘴紙。 在一實施例中，該限流元件之第一空腔係至 該限流元件之第一及第三管狀部的內周圍所界定 限流元件之第二空腔係至少部分由該限流元件之 部的內周圍所界定。 在此實施例中，較佳是，在該第二管狀部之 向端面中設置一或多個開口，其在該第二空腔與 之至少一排周圍穿孔間形成一相通路徑。更佳是 二管狀部之一上游橫向端面的周圍中設置複數個 隔開的開口，其在該第二空腔與該通風區之至少 穿孔間形成一相通路徑。例如，在該第二管狀部 向端面的周圍中設置12個大致均等隔開的開口， 三管狀部向外放射狀地擴展。 較佳地’該一或多個開口具有在約〇.3mm至 間之直徑’更佳的是約〇.5rnni。 在一替代實施例中，該限流元件之第一空腔 分由該限流元件之第—管狀部的內周圍所界定， 品之口端 形成在該 孑L (online 煙嘴紙中 少部分由 ，以及該 第二管狀 一上游橫 該通風區 ，在該第 大致均等 —排周圍 之上游橫 其從該第 約 0.8 mm 係至少部 以及該限 201103449 流元件之第二空腔係至少部分由該限流元件之第二及第三 管狀部的內周圍所界定。 在此實施例中，較佳地是在該第三管狀部之一周圍表 面中設置一或多個開口，其在該第二空腔與該通風區之至 少一排周圍穿孔間形成一相通路徑。 例如，可以在該第三管狀部之上游周圍表面中設置一 對細長相對開口。 較佳地，依據本發明之煙品具有在約百分之50至約百 分之90間之通風等級，更佳的是在約百分之60至約百分 之80間，最佳的是約百分之70。 該限流元件可以由任何合適材料或其組合所製成。可 用以形成該限流元件之合適材料包括但不限於塑膠（例 如，聚丙烯、聚乙烯、聚苯乙烯、尼龍、聚楓、聚酯或聚 氨酯）、纖維素材料及其組合或合成》 較佳地，該限流元件係由一可生物分解材料所製成， 更佳的是由一可生物分解聚合物材料所製成。合適可生物 分解聚合物材料在該技藝中係已知的及可根據來自 Novamont of Novara，Italy 的品牌名稱 Mater-Bi®及來自 BASF of Ludwigshafen，Germany 的品牌名稱 Ecovio®在市 場上購得。 較佳地，該限流元件係一單件，更佳的是一單射出成 形件。 較佳地’該限流兀件之長度係在約l〇mm至約20mm -10- 201103449 間，更佳的是在約12mm至約14mm間，最佳的是約13mm。 較佳地，該限流元件之第一管狀部的長度係至少約 4mm，更佳的是至少約5mm。 較佳地，該限流元件之第二管狀部的長度係至少約 3mm，最佳的是約3.5mme 較佳地，該限流元件之第三管狀部的長度係至少約 3mm，最佳的是約3.5mm。 較佳地，該橫向阻擋部離該限流元件之第二管狀部的 下游處至少約1mm，更佳的是至少約1.5mm。 較佳地，該限流元件之第一及第二管狀部的外徑係在 約6mm至約9mm間，更佳的是在約7mm至約8.4mm間， 最佳的是在約7.5mm至約7.9mm間。 較佳地，該限流元件之第三管狀部的外徑係在約4mm 至約7.5 m m間，更佳的是在約4.5 m m至約6.8 m m間，最佳 的是在約4.5mm至約5.5mm間。 該濾嘴可以進一步包括在該限流元件之上游處的一或 多個濾嘴段。在另一情況中，或此外，該濾嘴可以進一步 包括在該限流元件之下游處的一或多個濾嘴段。在一較佳 實施例中，該濾嘴進一步包括在該限流元件之上游處的一 第一濾嘴段及在該限流元件之下游處的一第二濾嘴段。較 佳地’該第一及第二濾嘴段的長度係在約5mm至約12mm 間，更佳的是在約6mm至8mm間，最佳的是約7mm。 在該濾嘴包括在該限流元件之上游處的一或多個濾嘴 -11 - 201103449 段及在該限流元件之下游處的一或多個濾嘴段之情 該等上游及下游濾嘴段可以是相同或不同的。例如 嘴可以包括在該限流元件之兩側上所配置之一對相 纖維素絲束段。在另一情況中’該濾嘴可以包括在 元件之上游處的一醋酸纖維素絲束塡料及在該限流 下游處的一例如紙、硬紙板或醋酸纖維素中空管。 較佳地，該一或多個濾嘴段包括低微粒相過濾 過濾材料。較佳地，該—或多個濾嘴段之每一者的 過濾效率小於約百分之30，更佳的是小於約百分之 一尤佳實施例中，該濾嘴包括在該限流元件之上游 低微粒相過濾效率之第一濾嘴段及在該限流元件之 的一低微粒相過濾效率之第二濾嘴段。 該一或多個濾嘴段可以包括像醋酸纖維素絲束 素材料或低過濾效率之其它合適纖維過濾材料。在 多個濾嘴段包括醋酸纖維素絲束之情況下，可以選 細絲之丹尼及該絲束之總丹尼，以便達成一期望微 率及RTD。較佳地，該醋酸纖維素絲束具有約8或 尼/每細絲及約28，000或更小之總丹尼。 較佳地，以一塡料捲紙帶外接該限流元件及一 濾嘴段（在存在情況下）。在一實施例中，以一大致 塡料捲紙帶（較佳的是一具有在約 7,000 Coresta 20,000 Coresta單位間之滲透性的塡料捲紙帶）外接 元件及一或多個濾嘴段》在一替代實施例中，以一 況下， ，該濾 同醋酸 該限流 元件之 效率之 微粒相 20。在 處的一 下游處 之纖維 該一或 擇每一 粒相效 更大丹 或多個 不透氣 單位至 該限流 大致可 -12- 201103449 透氣塡料捲紙帶外接該限流元件及一或多個濾嘴段。 較佳地’將該塡料捲紙帶固定至該限流元件之第一管 狀部的外周圍表面。更佳的是，將該塡料捲紙固定至該限 流元件之第一管狀部的外周圍表面，以便在該第一管狀部 之外表面上建立一大致氣密。最佳的是，將該塡料捲紙帶 固定至該限流元件之第一及第二管狀部的外周圍表面。 在該濾嘴包括在該限流元件之上游處的一濾嘴段之情 況下’較佳的是將該塡料捲紙帶固定至該上游濾嘴段之外 周圍表面。更佳的是，將該塡料捲紙固定至該上游濾嘴段 及該限流元件之第一管狀部的外周圍表面，以便在該限流 元件之第一管狀部的外表面上建立一大致氣密。 在該濾嘴包括在該限流元件之下游處的一濾嘴段之情 況下，較佳的是將該塡料捲紙帶固定至該下游濾嘴段之外 周圍表面。 可以使用例如一黏著劑將該塡料捲紙帶固定至該限流 元件及一或多個濾嘴段。可以經由一用以提供良好附著及 高表面黏性之黏著劑的使用在該塡料捲紙帶與該限流元件 之第一管狀部間獲得氣密。合適黏著劑在該技藝中係已知 的及可根據來自Henkel of Dtisseldorf，Germany的品牌名 稱Adhesin在市場上購得。 如以上所述，較佳地是藉一大致不透氣煙嘴紙帶，將 包括該塡料捲紙帶之該濾嘴附著至該可吸煙材料桿。 在該濾嘴包括一大致不透氣塡料捲紙之情況下，該通 -13- 201103449 風區較佳的是包括經由該煙嘴紙及該塡料捲紙之一部分所 設置之至少一排周圍穿孔，其中該至少一排周圍穿孔係於 該煙品之製造期間在線上形成的。 在該濾嘴包括一大致可透氣塡料捲紙帶之情況下，較 佳的是藉一包括至少一排周圍穿孔之預打孔煙嘴紙帶，將 該濾嘴附著至該可吸煙材料桿。 可以藉由預打孔煙嘴紙及可透氣塡料捲紙之使用來調 整依據本發明之煙品的RTD。可以按照一定尺寸來製造該 限流元件之至少一孔，以大致允許所有流通空氣在使用中 流過在該煙嘴紙及該可透氣塡料捲紙中之穿孔，進而流入 該第二下游空腔。此外，藉由在該煙嘴紙之在該限流元件 之第三管狀部上的部分中提供該等穿孔，以及因而提供通 風區，以及使該通風區與該第二下游空腔分開（在該第二下 游空腔中，從該可吸煙材料桿所抽吸主流煙與該流通空氣 混合），該主流煙不會向上游流動及經由在該煙嘴紙中之穿 孔離開。因而，經由具有不同多孔性等級之不同預打孔煙 嘴紙或塡料捲紙或其組合之使用可以有利地改變依據本發 明之煙品的通風等級。 較佳地，該濾嘴具有在約2 0 mm及約34mm間之總長 度，更佳的是在約25mm及約30mm間，最佳的是約27mm。 較佳地，依據本發明之煙品的濾嘴具有在約250mm WG 至約350mm WG間之總密封RTD，更佳的是在約275mm WG 至約325mm WG間。 -14 - 201103449 較佳地’依據本發明之煙品具有至少約30mm WG之總 未密封RTD，更佳的是至少約40mm WG ^ 較佳地’該可吸煙材料桿包括以一捲菸紙所外接之菸 草，更佳的是以一捲菸紙所外接之菸草截止過濾器（tobacco cut filter) 0 較佳地，該可吸煙材料桿包括一捲菸紙，其中該捲菸 紙導致旁流煙量之減少。用於依據本發明之煙品的合適低 旁流煙捲菸紙在該技藝中係眾所皆知的及被描述於例如 US-A-5，1 52,304 中。 較佳地，該捲菸紙具有高基重及低可滲透性》更佳的 是，該捲菸紙係US-A-5，1 52,304所述之型態。 較佳地，該捲菸紙具有至少約35g/m2之基重，更佳的 是在約35g/m2至約60g/m2間之基重，最佳的是在約40g/m2 至約50g/m2間之基重。 較佳地，該捲菸紙具有約18 Coresta單位或更小之可 滲透性，更佳的是在約4 Coresta單位至約18 Coresta單位 間，最佳的是在約5 Cores ta單位至約8 Co res ta單位間。 較佳地，該捲菸紙包括一過濾器，更佳的是一無機過 濾器，最佳的是碳酸鈣。較佳地，該捲菸紙具有在約20至 約50重量百分比之濾池負載（filter loading)，更佳的是約 40重量百分比。 較佳地，該捲菸紙進一步包括一燃燒調節劑（bum modifier)。更佳的是，該捲菸紙包括在0.3至5重量百分比 201103449 間之燃燒調節劑。合適燃燒調節劑在該技藝中係已知的及 包括但不限於無機或有機酸之酸性鹽，其包括多價無機酸 (例如’磷酸、焦磷酸、硼酸及硫酸）之鉀及鈉鹽及羧酸（例 如’檸檬酸、丁二酸及反丁烯二酸）之單鉀及鈉鹽；在原處 熱解而產生酸性類之化合物，其包括具有不穩定質子之多 價酸的鹽類；爲酸性先驅物之各種酯類，其包括磷酸酯（例 如’ α-D-葡萄糖-1-憐酸醋之郵鹽（potassium salt of α-D-glucose-l-phosphate));以及其組合。較佳地，該燃燒 調節劑係一酸性鹽，更佳的是磷酸二氫鉀（monobasic potassium phosphate) ° 較佳地，依據本發明之煙品具有小於或等於1之一氧 化碳對焦油比》 較佳地，依據本發明之煙品具有一完全無尼古丁乾燥 微粒物質（nicotine free dry particulate matter, NFDPM)或約 3mg至約12mg間之「焦油」釋放》 將參考所附圖式僅以範例方式來進一步描述本發明。 【實施方式】 第1圖所示之依據本發明的第一實雖例之煙品10包括 —圓柱形桿菸草桿12及一濾嘴14。該濾嘴14藉由一煙嘴 紙16帶附著至該桿菸草桿12,該煙嘴紙16外接該濾嘴14 及該桿薛草桿12之一鄰接部，該桿薛草桿12包括一被一 高基重及低滲透性捲菸紙20所外接之菸草載止過濾器 (tobacco cut filter)18 〇201103449 VI. Description of the Invention: [Technical Field] The present invention provides a smoking article having a low sidestream cigarette paper and a carbon monoxide tar ratio of less than or equal to one. [Prior Art] In some jurisdictions, there are rules governing the maximum carbon monoxide, tar, and nicotine production of cigarettes. It is known to provide cigarettes and other smoking articles with low permeability cigarette paper in order to reduce the sidestream smoke generated during their smoking. However, while advantageously reducing sidestream smoke, the inclusion of low permeability cigarette paper may undesirably increase carbon monoxide production and thus increase the carbon monoxide tar ratio of the sidestream smoke produced by such tobacco products. While ventilation can be used to reduce carbon monoxide and tar release, high grade ventilation can adversely result in unacceptably low levels of resistance to draw (RTD). However, when ventilation reduces the release of gas phase and particulate phase, it has little effect on the carbon monoxide tar ratio. One or more high density cellulose acetate filter segments may be included to increase the total RTD and high level ventilation to a acceptable level of smoking articles having low permeability cigarette paper. However, high density cellulose acetate filter sections typically reduce tar release with little or no effect on carbon monoxide release. Accordingly, it is desirable to provide a smoking article having a low sidestream cigarette paper and a carbon monoxide tar ratio of less than or equal to one. SUMMARY OF THE INVENTION -4- 201103449 According to the present invention 'providing a smoking article' includes: a smokable material rod; and a filter comprising a flow restricting member attached to the smokable material rod, the flow restricting member comprising a first upstream integral tubular portion; a second downstream integral tubular portion having an outer diameter substantially the same as the first tubular portion; and a third intermediate integral tubular portion between the first and second tubular portions, The third tubular portion has a reduced outer diameter compared to the first and second tubular portions. Configuring a lateral barrier having at least one aperture disposed therein between a first upstream cavity and a second downstream cavity, wherein the first upstream cavity is at least partially defined by an inner circumference of the first tubular portion And the second downstream cavity is at least partially defined by the periphery of the second tubular portion. A venting zone communicating with the second cavity is disposed at a location along the filter. According to the present invention, there is further provided a current limiting element included in a smoking article according to the present invention, the limiting element comprising: a first integral tubular portion; a second integral tubular portion having substantially the same shape as the first tubular portion An outer diameter of the portion; a third intermediate integral tubular portion between the first and second tubular portions 'the third tubular portion has a reduced outer diameter compared to the first and second tubular portions; a lateral barrier portion Having at least one hole disposed therein and disposed between a first cavity and a second cavity, wherein the first cavity is at least partially defined by a circumference of the first tubular portion and the second cavity is At least partially defined by an inner circumference of the second tubular portion; and one or more openings in the surface of one of the second or third tubular portions communicating with the second cavity. According to the present invention, there is also provided a filter for a smoking article comprising a current limiting element according to the invention. Throughout this specification, the terms "upstream" and "downstream" are used to describe the relative orientation of the components of the smoking article of the present invention relative to the direction of mainstream smoke drawn from the smokable material rod through the filter during smoking. position. - comprising a flow restricting element having a structure as specified above and a filter for the venting zone comprising a highly ventilated smoking article according to the invention advantageously capable of producing a desired RTD, wherein the mainstream smoke has an oxidized carbon tar ratio Maintain at an acceptable number. As will be described in more detail below, this is true even when the smoking material rod of the smoking article comprises a low sidestream cigarette paper. Existing filter combinations and cigarette manufacturing equipment can be used without significant modifications to advantageously manufacture smoking articles in accordance with the present invention having filters (the filters comprising a current limiting element having the structure specified above) . Due to its shape, the current limiting element is resilient and during the manufacture of the filter and smoking article according to the invention (especially in the case of a filter according to the invention attached to a rod of smokable material for the manufacture of the invention according to the invention The process of the smoking article can be compressed. This advantageously facilitates the manufacture of filters and smoking articles in accordance with the present invention using existing filter combination and cigarette making equipment. The third tubular portion of the flow restricting member has a reduced outer diameter relative to the first and second tubular portions thereof, which advantageously establishes a venting region between the periphery of the filter and the outer portion of the third tubular portion. At the same time, the first and second tubular portions of the flow restricting member have a larger outer diameter than the third tubular portion, which advantageously provides reinforcement so that, for example, when the smoking article is held in a consumer's finger, The filter will not collapse. The first upstream cavity of the flow restricting element advantageously allows, in use, the mainstream smoke drawn by the rod of smokable material to be drawn further downstream through at least one of the lateral barriers by 201103449 Concentrating around the at least one hole. Additionally, the first upstream cavity assists in preventing clogging of the at least one aperture during smoking. The number of apertures provided in the lateral barrier and its size can be selected to achieve a desired RTD and carbon monoxide pylon ratio. Preferably, the lateral barrier comprises a single aperture, more preferably a substantially central single aperture. Where the lateral barrier comprises a substantially central single aperture, the diameter of the aperture is preferably between about 0.4 mm and about 0.8 mm, more preferably about 0.6 mme. Preferably, the length of the at least one aperture It is between about 0.2 mm and about 1 mm, more preferably about 0.7 mm. Throughout this specification, the term "length" is used to mean the dimension in the longitudinal direction of the smoking article. The length of the at least one hole is equal to the thickness of the lateral barrier. Preferably, the at least one aperture is fabricated to a sufficient size to provide a sufficient pressure drop such that the article has an RTD between about 30 mm WG (water gauge) and about 120 mm WG, more preferably at least about 40 mm WG. The smoke-tight lateral barrier can be of any suitable shape. For example, the lateral barrier can be substantially perpendicular to the longitudinal axis of the smoking article. In another case, the direction of the lateral barrier relative to the mainstream smoke drawn from the smokable material rod via the filter may be conical and converging or diverging. In still another embodiment, the lateral barrier may be concave or convex relative to the direction of the mainstream smoke drawn from the smokable material rod via the filter. Preferably, the transverse barrier may be concave relative to the direction of the mainstream smoke drawn from the smokable material rod through the filter. This advantageously mitigates the current limiting during the manufacture of the filter and smoking article according to the invention, in particular during the process of attaching the filter according to the invention to the rod of smokable material for the manufacture of the smoking article according to the invention. Compression of components. The second downstream cavity of the flow restricting element advantageously allows mainstream smoke drawn through one or more apertures provided in the transverse barrier to be mixed with air drawn in through the venting zone before being drawn into the consumer's mouth . Providing the venting zone from the smokable material rod in a second cavity of the restrictor element of the spout (ie, at a location downstream of at least one of the holes in the lateral barrier of the flow restricting element) The circulating air of the mainstream smoke that is drawn. Preferably, no venting air is provided upstream of at least one of the apertures of the lateral barrier. Circulating air is provided only downstream of the at least one aperture, advantageously limiting the extent to which the consumer may attempt to smoke the smoking article during smoking. In contrast to smoking in a conventional cellulose acetate tow filter, the pressure drop across the current limiting element increases more rapidly as the flow rate of smoking increases. As a result, consumers who smoke during smoking cause an increase in the flow of mainstream smoke, rather than increasing the release of mainstream smoke. Further, the circulated air is provided only downstream of at least one of the transverse walls of the flow restricting member, advantageously separating the venting zone from the function of at least one of the holes (the venting level and the RTD, respectively). Preferably, the filter is attached to the smokable material rod by a substantially airtight mouthpiece paper strip. Preferably, the venting zone comprises at least one row of peripheral perforations provided through a portion of the mouthpiece paper, and more preferably at least one of the portions of the mouthpiece paper located on the third tubular portion of the restrictor element 201103449 Perforation around the row. Preferably, the at least one row of peripheral perforations is located at least 1 2 m from the smoke. Perforations in conventional technology cigarette paper can be used before or during the manufacture of the smoking article. For example, laser perforation, mechanical perforation, or electrostatic perforation can be used to create the perforations therein. Preferably, the mouthpiece paper is pre-punched. In one embodiment, the first cavity of the current limiting element to the inner circumference of the first and third tubular portions of the current limiting element defines a second cavity of the current limiting element at least in part by the current limiting element The inner circumference of the ministry is defined. In this embodiment, preferably, one or more openings are provided in the end faces of the second tubular portion to form a communication path between the second cavity and the perforations around at least one of the rows. More preferably, a plurality of spaced apart openings are provided in the periphery of the upstream transverse end face of one of the tubular portions, which form a communication path between the second cavity and at least the perforations of the venting region. For example, twelve substantially equally spaced openings are provided in the periphery of the end face of the second tubular portion, and the three tubular portions are radially expanded outward. Preferably, the one or more openings have a diameter of between about 〇3 mm and more preferably about 〇5 rnni. In an alternative embodiment, the first cavity of the current limiting element is defined by the inner circumference of the first tubular portion of the current limiting element, and the mouth end of the product is formed in the 孑L (a portion of the online cigarette paper is And the second tubular-upstream cross-section of the venting region, at least upstream of the first substantially equal-row row from the first portion of the first 0.8 mm portion and the second cavity of the current limit portion of the 201103449 flow element Defining an inner circumference of the second and third tubular portions of the flow restricting member. In this embodiment, preferably one or more openings are provided in a peripheral surface of one of the third tubular portions, in the second Forming a communication path between the cavity and the perforation around at least one row of the venting zone. For example, a pair of elongated opposing openings may be provided in the upstream surface of the third tubular portion. Preferably, the smoking article according to the present invention has The ventilation level is from about 50% to about 90%, more preferably from about 60% to about 80%, and most preferably about 70%. The current limiting element can Made from any suitable material or combination thereof. Suitable materials for forming the current limiting element include, but are not limited to, plastics (e.g., polypropylene, polyethylene, polystyrene, nylon, poly maple, polyester, or polyurethane), cellulosic materials, and combinations or combinations thereof. The current limiting element is made of a biodegradable material, more preferably a biodegradable polymer material. Suitable biodegradable polymer materials are known in the art and can be The brand name Mater-Bi® from Novamont of Novara, Italy and the brand name Ecovio® from BASF of Ludwigshafen, Germany are commercially available. Preferably, the current limiting element is a single piece, more preferably a single piece. Preferably, the length of the restricting element is between about 1 mm to about 20 mm to 10 201103449, more preferably between about 12 mm and about 14 mm, and most preferably about 13 mm. Preferably, the first tubular portion of the flow restricting member has a length of at least about 4 mm, more preferably at least about 5 mm. Preferably, the second tubular portion of the flow restricting member has a length of at least about 3 mm, preferably Is about 3.5 mme, preferably, the current limit Preferably, the third tubular portion has a length of at least about 3 mm, and most preferably about 3.5 mm. Preferably, the transverse barrier is at least about 1 mm downstream of the second tubular portion of the flow restricting member, more preferably Preferably, the first and second tubular portions of the flow restricting member have an outer diameter of between about 6 mm and about 9 mm, more preferably between about 7 mm and about 8.4 mm, most preferably Preferably, the third tubular portion of the flow restricting member has an outer diameter of between about 4 mm and about 7.5 mm, more preferably between about 4.5 mm and about 6.8 mm. Most preferably between about 4.5 mm and about 5.5 mm. The filter may further comprise one or more filter segments upstream of the flow restricting element. In another aspect, or in addition, the filter may further include one or more filter segments downstream of the flow restricting member. In a preferred embodiment, the filter further includes a first filter segment upstream of the flow restricting member and a second filter segment downstream of the flow restricting member. Preferably, the length of the first and second filter segments is between about 5 mm and about 12 mm, more preferably between about 6 mm and 8 mm, and most preferably about 7 mm. The upstream and downstream filters are included in the filter comprising one or more filters -11 - 201103449 upstream of the current limiting element and one or more filter segments downstream of the flow restricting element The mouth segments can be the same or different. For example, the mouth can include a pair of phase cellulose tow segments disposed on either side of the flow restricting member. In another case, the filter may comprise a cellulose acetate tow meal upstream of the element and a hollow tube such as paper, cardboard or cellulose acetate downstream of the current limit. Preferably, the one or more filter segments comprise a low particulate phase filtration filter material. Preferably, the filtering efficiency of each of the filter segments or segments is less than about 30 percent, more preferably less than about one percent. In a preferred embodiment, the filter is included in the current limiting a first filter segment having a low particulate phase filtration efficiency upstream of the component and a second filter segment having a low particulate phase filtration efficiency at the current limiting component. The one or more filter segments can include other suitable fiber filtration materials such as cellulose acetate tow material or low filtration efficiency. In the case where the plurality of filter segments include cellulose acetate tow, the filamentary denier and the total denier of the tow can be selected to achieve a desired micron and RTD. Preferably, the cellulose acetate tow has a total denier of about 8 or about per filament and about 28,000 or less. Preferably, the current limiting element and a filter segment (where available) are circumscribed by a web of paper. In one embodiment, the outer tape and one or more filter segments are in a substantially continuous web of tape (preferably a web of tape having a permeability between about 7,000 Coresta 20,000 Coresta units). In an alternate embodiment, the filter phase 20 is filtered with the efficiency of the flow-limiting element. At the downstream of the fiber, one or each of the particles is more effective or a plurality of gas impermeable units to the current limit is substantially -12-201103449. The gas permeable paper roll tape is externally connected to the current limiting element and one or Multiple filter segments. Preferably, the web of reel is secured to the outer peripheral surface of the first tubular portion of the flow restricting member. More preferably, the roll paper is secured to the outer peripheral surface of the first tubular portion of the flow restricting member to establish a substantially airtight seal on the outer surface of the first tubular portion. Most preferably, the web of reel is secured to the outer peripheral surface of the first and second tubular portions of the flow restricting member. Where the filter comprises a filter segment upstream of the flow restricting member, it is preferred to secure the web of reel to the peripheral surface of the upstream filter segment. More preferably, the roll paper is fixed to the upstream filter segment and the outer peripheral surface of the first tubular portion of the flow restricting member to establish a surface on the outer surface of the first tubular portion of the flow restricting member It is roughly airtight. Where the filter comprises a filter segment downstream of the flow restricting member, it is preferred to secure the web of reel to the peripheral surface of the downstream filter segment. The web of reeling tape can be secured to the flow restricting element and one or more filter segments using, for example, an adhesive. Airtightness between the web of the web and the first tubular portion of the flow restricting member can be achieved via the use of an adhesive for providing good adhesion and high surface tack. Suitable adhesives are known in the art and are commercially available under the brand name Adhesin from Henkel of Dtisseldorf, Germany. As described above, it is preferred to attach the filter including the crepe paper web to the smokable material rod by means of a substantially airtight mouthpiece paper strip. Where the filter comprises a substantially airtight retort roll, the pass-13-201103449 wind zone preferably includes at least one row of perforations disposed through the mouthpiece paper and a portion of the reticle Wherein at least one row of surrounding perforations is formed on-line during manufacture of the smoking article. Where the filter comprises a substantially breathable crepe paper web, it is preferred to attach the filter to the smokable material rod by means of a pre-punched mouthpiece paper strip comprising at least one row of perforated perforations. The RTD of the smoking article according to the present invention can be adjusted by the use of pre-punched mouthpiece paper and breathable retort paper. At least one aperture of the flow restricting element can be fabricated to a size sufficient to allow all of the circulated air to flow through the perforations in the mouthpiece paper and the permeable web of reel in use, thereby flowing into the second downstream cavity. Furthermore, by providing the perforations in the portion of the mouthpiece paper on the third tubular portion of the flow restricting member, and thereby providing the venting zone, and separating the venting zone from the second downstream cavity (in the In the second downstream cavity, the mainstream smoke is drawn from the venting material rod and mixed with the circulating air, the mainstream smoke does not flow upstream and exits through the perforations in the mouthpiece paper. Thus, the degree of ventilation of the smoking article according to the present invention can be advantageously varied via the use of different pre-punched mouthpiece paper or paper rolls or combinations thereof having different levels of porosity. Preferably, the filter has a total length of between about 20 mm and about 34 mm, more preferably between about 25 mm and about 30 mm, and most preferably about 27 mm. Preferably, the filter of the smoking article according to the present invention has a total sealed RTD of between about 250 mm WG and about 350 mm WG, more preferably between about 275 mm WG and about 325 mm WG. -14 - 201103449 Preferably, the smoking article according to the invention has a total unsealed RTD of at least about 30 mm WG, more preferably at least about 40 mm WG ^ preferably 'the smoking material rod comprises an external cigarette paper Preferably, the tobacco is a tobacco cut filter circumscribing a cigarette paper. Preferably, the smokable material rod comprises a cigarette paper, wherein the cigarette paper causes a decrease in the amount of sidestream smoke. Suitable low sidestream cigarette papers for use in smoking articles in accordance with the present invention are well known in the art and are described, for example, in US-A-5,1 52,304. Preferably, the cigarette paper has a high basis weight and low permeability. More preferably, the cigarette paper is of the type described in US-A-5,1 52,304. Preferably, the cigarette paper has a basis weight of at least about 35 g/m2, more preferably a basis weight of from about 35 g/m2 to about 60 g/m2, most preferably from about 40 g/m2 to about 50 g/m2. The basis of the weight. Preferably, the cigarette paper has a permeability of about 18 Coresta units or less, more preferably between about 4 Coresta units and about 18 Coresta units, and most preferably between about 5 Cores ta units to about 8 Co. Res ta unit. Preferably, the cigarette paper comprises a filter, more preferably an inorganic filter, most preferably calcium carbonate. Preferably, the cigarette paper has a filter loading of from about 20 to about 50 weight percent, more preferably about 40 weight percent. Preferably, the cigarette paper further comprises a bum modifier. More preferably, the cigarette paper comprises between 0.3 and 5 weight percent of the 201103449 combustion modifier. Suitable combustion regulators are known in the art and include, but are not limited to, acidic or inorganic acid salts including potassium and sodium salts of polyvalent inorganic acids (eg, 'phosphoric acid, pyrophosphoric acid, boric acid, and sulfuric acid) and carboxylic acids. Monopotassium and sodium salts of acids (eg, 'citric acid, succinic acid, and fumaric acid); pyrolyzed in situ to produce acidic compounds, including salts of polyvalent acids with labile protons; Various esters of acidic precursors, including phosphates (e.g., 'sodium salt of alpha-D-glucose-l-phosphate); and combinations thereof. Preferably, the combustion regulator is an acid salt, more preferably monobasic potassium phosphate. Preferably, the smoking article according to the present invention has a oxidized carbon tar ratio of less than or equal to one. The smoking article according to the present invention has a completely no nicotine free dry particulate matter (NDDPM) or a "tar release" between about 3 mg and about 12 mg. Further reference will be made to the accompanying drawings by way of example only. The invention is described. [Embodiment] The first embodiment of the smoking article 10 according to the present invention shown in Fig. 1 includes a cylindrical rod tobacco rod 12 and a filter 14. The filter 14 is attached to the rod tobacco rod 12 by a cigarette holder paper 16 which is externally connected to the filter 14 and an adjacent portion of the rod grass blade 12, and the rod grass blade 12 includes a one. Tobacco cut filter 18 外 externally attached to high basis weight and low permeability cigarette paper 18 〇
-16- 201103449 該濾嘴14包括一相鄰及鄰接該桿菸草桿12之第一濾 嘴段22、一在該煙品10之口端的第二濾嘴段24及一在該 第一濾嘴段22與該第二濾嘴段24間所配置之一體射出成 形限流元件26。該第一及第二濾嘴段22及24較佳的是低 微粒效率醋酸纖維素絲束濾嘴段。 以一塡料捲紙28外接該第一及第二濾嘴段22及24與 該限流元件2 6。 如第2圖所更詳細描述，該限流元件26(較佳的是由可 生物分解聚合物材料所形成）包括一相鄰且鄰接該第一濾 嘴段22之第一上游整體管狀部30、一具有大致相同於該第 一管狀部30之外徑的相鄰且鄰近該第二濾嘴段24之第二 下游整體管狀部32及一位於該第一及第二管狀部30及32 間及具有比該第一及第二管狀部30及32小之外徑的第三 中間整體管狀部34。該塡料捲紙28係藉由一黏著劑（未顯 示）固定至該第一濾嘴段22及該限流元件26之第一管狀部 30的外周圍表面，以便在該限流元件26之第一管狀部30 的外表面形成一實質氣密。 由於該第三管狀部34具有比該第一及第二管狀部30 及32小之外徑，使該塡料捲紙28之內表面與該第三管狀 部34之外周圍表面隔開（如第2圖所示）。如下面所進一步 插述’該塡料捲紙28及上面煙嘴紙16帶與該第三管狀部 3 4之外周圍表面間的空間構成一通風區。 該限流元件26進一步包括一具有一小直徑單中心孔 -17- 201103449 38之橫向阻撞部36。如第2圖所示，該橫向阻擋部36係 設置在一第一上游空腔40與一第二下游空腔42間，其中 該第一上游空腔40係至少部分由該限流元件26之第一及 第三管狀部30及34的內周圍所界定，以及該第二下游空 腔42係至少部分由該限流元件之第二管狀部32之內周圍 所界定。 經由該煙嘴紙1 6及該塡料捲紙2 8之位於該限流元件 26之第三管狀部34上的部分設置一或多排周圍穿孔44(如 第1及2圖中之虛線所示）。如第3圖所示，在該第二管狀 部32之上游橫向端面的周圍中設置複數個大致均等隔開 的開口 46。這些開口 46在該煙嘴紙16及該塡料捲紙28 中所提供之一或多排周圍穿孔44與該第二空腔42間構成 —相通路徑（如第2圖所示）。 在使用中，來自該煙品10之桿菸草桿12的主流煙向 下游經由該濾嘴1 4之第一濾嘴段22被吸至該限流元件26 之第一空腔40中。被吸入該第一空腔40之主流煙在進一 步向下游經由該中心孔38被吸入該限流元件26之第二空 腔42前，集中在該限流元件26之橫向阻擋部26的中心孔 3 8周圍。 通風空氣經由在該煙嘴紙16及該塡料捲紙28中的一 或多排周圍穿孔44以及在該第二管狀部32之上游橫向端 面的周圍中所設置之複數個大致均等隔開的開口 46亦被 吸入被第二空腔42中。在經由該第二濾嘴段24進一步向 -18- 201103449 下游被吸入前，經由在該橫向阻擋部36之中心孔38所吸 入之主流煙與在該第二空腔42中之通風空氣混合。 在使用期間，該桿菸草桿12之高基重及低滲透性捲菸 紙20以已知方式有利地減少該煙品10所產生之旁流煙。 第4及5圖所示之依據本發明的第二實施例之煙品係 大大地相似於第1至3圖所示之本發明的第一實施例之構 造及設計。在第4及5圖中，對應於依據前述本發明之第 一具體例的煙品之結構的依據本發明之第二實施例的煙品 之結構使用相似元件符號。 第1至3圖所示之依據本發明的第一具體例之煙品10 與第4及5圖所示之依據本發明的第二具體例之煙品間的 唯一差異係：用以在該煙嘴紙及該塡料捲紙中之一或多排 周圍穿孔與該第二空腔間構成一相通路徑的開口之位置， 以及在該限流元件中之橫向阻擋部的位置。 如第4圖所示’在依據本發明之第二具體例的煙品之 濾嘴14的限流元件26'中，在一第一上游空腔4〇_與一第二 下游空腔4 2'間設置該橫向阻擋部36'，其中該第一上游空 腔40'係至少部分由該限流元件26_之第—管狀部3〇,的內周 圍所界定’以及該第二下游空腔42'係至少部分由該限流元 件26'之第二及第三管狀部32,及34,之內周圍所界定。 在該第二實施例中，如第5圖所示，在該限流元件26, 之第三管狀部34,的周圍表面中設置一對相對細長開口 46^該等相對細長開口 46'在該煙嘴紙16及該塡料捲紙28 •19- 201103449 中之一或多排周圍穿孔44與該第二空腔42'間構成一相通 路徑。 在使用中，通風空氣經由該煙嘴紙丨6及該塡料捲紙28 中之一或多排周圍穿孔44以及該第三管狀部3 4，之周圍表 面中所設置之該對相對細長開口 46·被吸入該第二空腔 421’它在該第二空腔42,中與經由該橫向阻擋部36·中之中 心孔3 V所吸入之主流煙混合。 可以使用傳統香煙桿製造設備來製造依據本發明之第 一及第二實施例的煙品之桿菸草桿12，其中該菸草載止過 濾器係在一行進帶上形成於一連續桿中及以該高基重及低 滲透性捲菸紙20的連續帶來捲繞，然後，沿著它的縱向接 縫黏合該高基重及低滲透性捲菸紙20。 亦可以已知結合技術使用現有高速濾嘴桿製造設備來 製造依據本發明之第一及第二實施例的煙品之濾嘴14。 然後，可以藉由使用供在已知濾嘴香煙之製造期間附 著濾嘴至桿菸草桿之現有機器，在該濾嘴14及該桿菸草桿 12之鄰接部的周圍固定煙嘴紙16帶，使該等濾嘴14及該 等桿菸草.桿12彼此結合及附著。 表1針對下面香煙提供吸煙總口數、煙尼古丁（SN)之 總量、焦油及一氧化碳以及CO/焦油及CO/SN比：一第一 香煙（香煙A)，依據第1至3圖所示之本發明的第一實施例 所製造，其中該第一及第二濾嘴段係低微粒效率醋酸纖維 素絲束之塡料；一第二香煙（香煙B)，依據大幅相同於香煙-16- 201103449 The filter 14 includes a first filter segment 22 adjacent to and adjacent to the rod tobacco rod 12, a second filter segment 24 at the mouth end of the smoking article 10, and a first filter in the first filter One of the sections disposed between the segment 22 and the second filter segment 24 projects the shaped flow restricting element 26. The first and second filter segments 22 and 24 are preferably low particle efficiency cellulose acetate tow filter segments. The first and second filter segments 22 and 24 and the current limiting member 26 are externally connected by a roll of paper 28. As described in greater detail in FIG. 2, the flow restricting member 26 (preferably formed of a biodegradable polymeric material) includes a first upstream unitary tubular portion 30 adjacent and adjacent the first filter segment 22. a second downstream integral tubular portion 32 adjacent to the outer diameter of the first tubular portion 30 and adjacent to the second filter segment 24 and a portion between the first and second tubular portions 30 and 32 And a third intermediate unitary tubular portion 34 having an outer diameter that is smaller than the first and second tubular portions 30 and 32. The roll paper 28 is secured to the outer peripheral surface of the first filter section 22 and the first tubular portion 30 of the flow restricting member 26 by an adhesive (not shown) for the flow restricting member 26 The outer surface of the first tubular portion 30 forms a substantially airtight. Since the third tubular portion 34 has a smaller outer diameter than the first and second tubular portions 30 and 32, the inner surface of the reticle 28 is spaced from the outer surface of the third tubular portion 34 (eg, Figure 2). As will be further explained below, the space between the strip of the web 28 and the upper mouthpiece paper 16 and the outer surface of the third tubular portion 34 constitutes a venting zone. The flow restricting member 26 further includes a lateral blocking portion 36 having a small diameter single center hole -17-201103449 38. As shown in FIG. 2, the lateral blocking portion 36 is disposed between a first upstream cavity 40 and a second downstream cavity 42, wherein the first upstream cavity 40 is at least partially comprised by the current limiting element 26. The inner circumference of the first and third tubular portions 30 and 34 are defined, and the second downstream cavity 42 is at least partially defined by the inner circumference of the second tubular portion 32 of the flow restricting member. One or more rows of peripheral perforations 44 are provided through the mouthpiece paper 16 and the portion of the dip roll 28 that is located on the third tubular portion 34 of the flow restricting member 26 (as indicated by the dashed lines in Figures 1 and 2) ). As shown in Fig. 3, a plurality of substantially equally spaced openings 46 are provided in the periphery of the upstream lateral end face of the second tubular portion 32. These openings 46 form a communication path between the perforation 44 and the second cavity 42 provided in the mouthpiece paper 16 and the roll paper 28 (as shown in Fig. 2). In use, the mainstream smoke from the tobacco rod 12 of the smoking article 10 is drawn downstream into the first cavity 40 of the flow restricting member 26 via the first filter segment 22 of the filter 14. The mainstream smoke drawn into the first cavity 40 is concentrated in the central aperture of the lateral barrier 26 of the current limiting element 26 before being further drawn downstream through the central aperture 38 into the second cavity 42 of the current limiting element 26. 3 8 around. Ventilation air passes through one or more rows of perforations 44 in the mouthpiece paper 16 and the roll paper 28 and a plurality of substantially equally spaced openings disposed in the periphery of the upstream transverse end face of the second tubular portion 32 46 is also drawn into the second cavity 42. The mainstream smoke drawn in through the central aperture 38 of the lateral barrier 36 is mixed with the venting air in the second cavity 42 before being further drawn downstream of -18-201103449 via the second filter segment 24. During use, the high basis weight and low permeability cigarette paper 20 of the rod tobacco rod 12 advantageously reduces the sidestream smoke produced by the smoking article 10 in a known manner. The tobacco articles according to the second embodiment of the present invention shown in Figures 4 and 5 are substantially similar to the construction and design of the first embodiment of the present invention shown in Figures 1 to 3. In Figs. 4 and 5, the structure of the smoking article according to the second embodiment of the present invention corresponding to the structure of the smoking article according to the first specific example of the present invention is similarly used. The only difference between the smoking article 10 according to the first embodiment of the present invention shown in FIGS. 1 to 3 and the smoking article according to the second specific example of the present invention shown in FIGS. 4 and 5 is: The position of the opening of one or more rows of the mouthpiece paper and the roll of paper, the opening between the perforation and the second cavity forming a communication path, and the position of the lateral barrier in the flow restricting element. As shown in Fig. 4, in the current limiting member 26' of the filter 14 of the smoking article according to the second embodiment of the present invention, a first upstream cavity 4〇 and a second downstream cavity 4 2 are shown. The lateral blocking portion 36' is disposed between the first upstream cavity 40' and the second downstream cavity defined by at least a portion of the inner circumference of the first tubular portion 3' 42' is defined at least in part by the circumference of the second and third tubular portions 32, 34 of the flow restricting member 26'. In the second embodiment, as shown in Fig. 5, a pair of relatively elongated openings 46 are formed in the peripheral surface of the third tubular portion 34 of the flow restricting member 26, and the relatively elongated openings 46' are One or more rows of perforations 44 in the mouthpiece paper 16 and the pick-up paper 28 • 19-201103449 form a communication path with the second cavity 42'. In use, ventilating air passes through the pair of perforations 44 of the mouthpiece stack 6 and the stack of web 28 and the pair of relatively elongated openings 46 disposed in the peripheral surface of the third tubular portion 34. • being drawn into the second cavity 421 ′ which is mixed in the second cavity 42 with the mainstream smoke drawn through the central opening 3 V in the lateral barrier 36·. The tobacco rod rod 12 of the smoking article according to the first and second embodiments of the present invention may be manufactured using a conventional cigarette rod manufacturing apparatus, wherein the tobacco loading filter is formed in a continuous rod on a traveling belt and The high basis weight and low permeability cigarette paper 20 is continuously wound and then bonded to the high basis weight and low permeability cigarette paper 20 along its longitudinal seam. It is also known that the bonding technique uses the existing high speed filter rod manufacturing apparatus to manufacture the filter 14 of the smoking article according to the first and second embodiments of the present invention. The mouthpiece paper 16 can then be secured around the filter 14 and the abutment of the rod tobacco rod 12 by using an existing machine for attaching the filter to the rod tobacco rod during manufacture of known filter cigarettes. The filters 14 and the rod tobacco rods 12 are bonded and attached to each other. Table 1 provides the total number of cigarettes, total amount of nicotine (SN), tar and carbon monoxide, and CO/tar and CO/SN ratio for the following cigarettes: a first cigarette (cigarette A), as shown in Figures 1 to 3. The first embodiment of the present invention is manufactured, wherein the first and second filter segments are low-particle efficiency cellulose acetate tow; and the second cigarette (cigarette B) is substantially the same as the cigarette
L -20- 201103449 A之構造的發明，但是其中以一醋酸纖維素絲束中空圓柱 形管取代該第二濾嘴段；以及一第三香煙（香煙C)，依據大 幅相同於香煙A之構造的發明，但是其中以一傳統基重及 滲透性捲菸紙取代該桿菸草桿之高基重及低滲透性捲紙。 爲了比較，表1亦針對3種不是依據本發明之具有傳 統醋酸纖維素絲束濾嘴的香煙提供吸煙總口數、煙尼古丁 (SN)之總量、焦油及一氧化碳以及CO/焦油及CO/SN比。 該等香煙中之兩者具有有高基重及低滲透性捲菸紙之桿菸 草桿（香煙D及E)，以及該等香煙中之一具有有傳統基重及 滲透性捲菸紙之桿菸草桿（香煙F)。 如表1所示，對於具有傳統醋酸纖維素絲束濾嘴之香 煙，一高基重及低滲透性捲菸紙（香煙D及E)之包含導致一 氧化碳產量之增加。再者，雖然具有傳統醋酸纖維素絲束 濾嘴及一高基重及低滲透性捲菸紙之香煙（香煙D及E)的 通風等級之增加顯著地減少一氧化碳產量，但是它沒有顯 著地影響一氧化碳對焦油比^ 相較於具有傳統醋酸纖維素絲束濾嘴之香煙，依據本 發明之香煙（香煙A、B及C)皆具有小於1之一氧化碳對焦 油比。特別地，如表1所示，依據本發明之具有一高基重 及低滲透性捲菸紙及一由一醋酸纖維素絲束中空圓柱形管 所構成之第二濾嘴段的香煙（香煙B)之吸煙總口數、煙尼古 丁（SN)及焦油產量係非常相似於具有一傳統醋酸纖維素絲 束濾嘴及一傳統基重及滲透性捲菸紙之香煙（香煙F)的吸 -21 - 201103449 煙總口數、煙尼古丁（SN)及焦油產量。然而，儘管一低旁 流煙捲菸紙之包含，相較於香煙F，可有利地且顯著地減 少香煙B之一氧化碳產量及一氧化碳對焦油和一氧化碳對 煙尼古丁比。 mm A Β C D Ε F 桿辟桿 長度(_) 57 57 57 57 57 57 捲薛紙之基重(g/m2) 45 45 25 45 45 25 捲菸紙之滲透性(Coresta單位） 6 6 56 6 6 56 濾嘴 總長度(mm) 27 27 27 27 27 27 耐吸性(mm WG) 298 298 298 65 67 108 通風(百分比） 71 70 70 53 39 46 第一濾嘴段之長度 7 7 7 27 27 27 限流元件之長度 13 13 13 - 第二濾嘴段之長度 7 7 7 - - 該或每一濾嘴段之醋酸纖維素絲 束的每一細絲之丹尼 8Y 8Υ 8Υ 5.5Υ 5.5Υ 2.5Υ 該或每一濾嘴段之醋酸纖維素絲 束的總丹尼 28,000 28,000 28,000 35；000 35,000 37,000 限流元件之長度 13 13 13 - - - 香煙 耐吸性(mmWG) 42 33 44 71 82 109 SN(mg/香煙） 0.49 0.58 0.49 0.63 0.76 0.56 焦油(mg/香煙） 5.09 5.90 4.46 7.00 8.90 5.98 C0(mg/香煙） 4.12 4.03 2.95 9.30 12.80 7.03 吸煙總口數激目/香煙） 7.60 7.33 6.95 7.60 7.00 7.50 C0僬油 0.8 0.7 0.7 1.3 1.4 1.2 C0/SN 8.4 6.9 6.0 14.8 16.8 12.6The invention of the structure of L -20-201103449 A, but wherein the second filter segment is replaced by a hollow cylindrical tube of cellulose acetate tow; and a third cigarette (cigarette C) is constructed according to substantially the same as cigarette A The invention, however, replaces the high basis weight and low permeability web of the rod tobacco rod with a conventional basis weight and permeable cigarette paper. For comparison, Table 1 also provides the total number of cigarettes, the total amount of nicotine (SN), tar and carbon monoxide, and CO/tar and CO/ for three cigarettes not having the traditional cellulose acetate tow filter according to the present invention. SN ratio. Two of the cigarettes have rod tobacco rods (cigarettes D and E) having a high basis weight and a low permeability cigarette paper, and one of the cigarettes has a rod of tobacco rod having a conventional basis weight and a permeable cigarette paper (cigarette F). As shown in Table 1, for a cigarette having a conventional cellulose acetate tow filter, the inclusion of a high basis weight and low permeability cigarette paper (cigarettes D and E) resulted in an increase in carbon monoxide production. Furthermore, although the increase in ventilation levels of conventional cellulose acetate tow filters and cigarettes with a high basis weight and low permeability cigarette paper (cigarettes D and E) significantly reduced carbon monoxide production, it did not significantly affect carbon monoxide. The tar oil ratio has a cigarette having a conventional cellulose acetate tow filter, and the cigarettes according to the present invention (cigarettes A, B, and C) have a carbon monoxide tar ratio of less than one. Specifically, as shown in Table 1, a cigarette (cigarette B) having a high basis weight and low permeability cigarette paper and a second filter segment composed of a hollow cylindrical tube of cellulose acetate tow according to the present invention The total number of cigarettes smoked, nicotine (SN) and tar production is very similar to that of a cigarette with a traditional cellulose acetate tow filter and a traditional basis weight and permeable cigarette paper (cigarette F). 201103449 Total cigarette count, nicotine (SN) and tar production. However, despite the inclusion of a low sidestream cigarette paper, it is advantageous and significantly reduced the carbon monoxide production of cigarette B and the carbon monoxide tar and carbon monoxide to nicotine ratio compared to cigarette F. Mm A Β CD Ε F Rod length (_) 57 57 57 57 57 57 Basis weight of paper (g/m2) 45 45 25 45 45 25 Permeability of cigarette paper (Coresta unit) 6 6 56 6 6 56 Total length of the filter (mm) 27 27 27 27 27 27 Suction resistance (mm WG) 298 298 298 65 67 108 Ventilation (percentage) 71 70 70 53 39 46 Length of the first filter section 7 7 7 27 27 27 Limit Length of the flow element 13 13 13 - Length of the second filter section 7 7 7 - - Danny 8Y 8Υ 8Υ 5.5Υ 5.5Υ 2.5Υ of each filament of the cellulose acetate tow of the or each filter segment Total denier of the cellulose acetate tow of the or each filter segment 28,000 28,000 28,000 35;000 35,000 37,000 Length of the current limiting element 13 13 13 - - - Cigarette resistance (mmWG) 42 33 44 71 82 109 SN ( Mg/cigarette) 0.49 0.58 0.49 0.63 0.76 0.56 tar (mg/cigarette) 5.09 5.90 4.46 7.00 8.90 5.98 C0 (mg/cigarette) 4.12 4.03 2.95 9.30 12.80 7.03 Total number of cigarettes smoking / cigarettes 7.60 7.33 6.95 7.60 7.00 7.50 C0 Oyster sauce 0.8 0.7 0.7 1.3 1.4 1.2 C0/SN 8.4 6.9 6.0 14.8 16.8 12.6
-22- 201103449 上面已舉例說明關於包括具有第一及第二濾嘴段（包 括醋酸纖維素之塡料）之濾嘴的煙品之本發明。然而，將察 覺到’依據本發明之煙品可以包括具有一個或多個濾嘴段 之濾嘴’其中該（等）濾嘴段包括像紙（例如，濾紙或碳紙）、 硬紙板、塑膠（例如，聚丙烯、聚乙烯、聚苯乙烯、尼龍、 聚楓、聚酯或聚氨酯）、生物高聚合物及其組合之其它材料。 再者，雖然上面已舉例說明關於包括具有限流元件（包 括其中設置有一大致單中心孔之橫向阻擋部）之濾嘴的煙 品之本發明，但是將察覺到，依據本發明之煙品可以包括 濾嘴，其中該等濾嘴包括在其中設置有一單非中心孔或兩 個或更多個孔之橫向阻擋部。 【圖式簡單說明】 第1圖係依據本發明之第一實施例的一煙品的展開立 體圖，其中煙嘴紙及濾嘴塡料捲紙被部分展開，以揭示該 濾嘴之內部組件： 第2圖係第1圖之煙品的濾嘴之部分縱向剖面圖； 第3圖係第2圖之煙品的濾嘴之限流元件沿著A-A線 (如第2圖之虛線所示）的橫向剖面圖； 第4圖係依據本發明之第二實施例的一煙品之濾嘴的 部分縱向剖面圖；以及 第5圖係第4圖之煙品的濾嘴之限流元件沿著B-B線 (如第3圖之虛線所示）的橫向剖面圖。 【主要元件符號說明】 -23- 201103449 10 煙 品 12 圓 柱 形 桿 菸 草 桿 14 濾 嘴 16 煙 嘴 紙 18 菸 草 載 止 過 濾 器 20 高 基 重 及 低 滲 透 性 捲菸紙 22 第 一 濾 嘴 段 24 第 二 濾 嘴 段 26 限 流 元 件 26' 限 流 元 件 28 塡 料 捲 紙 30 第 一 上 游 整 體 管 狀 部 30' 第 — 管 狀 部 32 第 二 下 游 整 體 管 狀 部 32' 第 二 狀 部 34 第 二 中 間 整 體 管 狀 部 34' 第 二 管 狀 部 36 橫 向 阻 擋 部 36' 橫 向 阻 擋 部 38 單 中 心 孔 38' 單 中 心 孔 40 第 一 上 游 空 腔 40' 第 一 上 游 空 腔 42 第 二 下 游 空 腔 42' 第 二 下 游 空 腔 -24- 201103449 44 穿 孔 46 開 □ 46' 開 □ -25-22- 201103449 The invention of a smoking article comprising a filter having first and second filter segments (including cellulose acetate) has been exemplified above. However, it will be appreciated that 'the smoking article according to the invention may comprise a filter having one or more filter segments' wherein the (etc.) filter segments comprise paper (eg, filter paper or carbon paper), cardboard, plastic (for example, polypropylene, polyethylene, polystyrene, nylon, poly maple, polyester or polyurethane), biohigh polymers, and other materials in combination. Furthermore, although the invention has been described above with respect to a smoking article comprising a filter having a flow restricting element (including a lateral barrier in which a substantially single central opening is provided), it will be appreciated that the smoking article according to the present invention may Filters are included wherein the filters include lateral barriers in which a single non-central aperture or two or more apertures are disposed. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a smoking article according to a first embodiment of the present invention, in which a cigarette paper and a filter paper roll are partially unfolded to reveal the internal components of the filter: 2 is a longitudinal sectional view of a portion of the filter of the smoking article of Fig. 1; Fig. 3 is a flow restricting element of the filter of the smoking article of Fig. 2 along the line AA (shown by the dotted line in Fig. 2) Figure 4 is a partial longitudinal sectional view of a filter of a smoking article according to a second embodiment of the present invention; and Figure 5 is a flow restricting member of the filter of the smoking article of Figure 4 along the BB A transverse section of the line (shown by the dashed line in Figure 3). [Description of main components] -23- 201103449 10 Tobacco 12 Cylindrical rod Tobacco rod 14 Filter 16 Tobacco paper 18 Tobacco load filter 20 High basis weight and low permeability cigarette paper 22 First filter section 24 Second Filter section 26 Current limiting element 26' Current limiting element 28 Pickup roll 30 First upstream integral tubular portion 30' First - tubular portion 32 Second downstream integral tubular portion 32' Second portion 34 Second intermediate integral tubular portion 34' second tubular portion 36 lateral barrier 36' lateral barrier 38 single central bore 38' single central bore 40 first upstream cavity 40' first upstream cavity 42 second downstream cavity 42' second downstream cavity -24- 201103449 44 Perforation 46 On □ 46' On □ -25