201204271 六、發明說明： 【發明所屬之技術領域】 本發明係有關一種以囊袋或捲紙包覆菸草絲之菸草 製品。 【先前技術】 SNUS係在製造後至交付給使用者為止，會有在囊袋 產生污損之情形。當在SNUS之囊袋產生污損時，會有讓 使用者抱持商品之品質低落之印象的問題，因此期待儘可 能抑制污損。在香菸之捲紙中之污損亦有同樣之問題。污 損係因囊袋或捲紙所包覆之菸草絲的成分以液體的形態浸 透在囊袋或捲紙而產生者。 專利文獻1、2係揭示：為了減低香菸之污損而使用 雙重捲紙，且使用設有細孔、基重低且透氣度高的捲紙來 作為内側捲紙。此外，亦記載有抑制因塗布烷基烯酮二聚 體等上漿劑所造成的表面濕潤性之技術内容。 污損成分之浸透係因毛細管力所產生的現象，細孔徑 越大的紙，毛細管力會越減少，細孔徑越小之紙，浸透距 離越變大。如專利文獻1、2所示，當内側捲紙之細孔徑比 外側捲紙之細孔徑大時，若污損成分浸透内側捲紙，則污 損成分亦浸透外側捲紙。因此，與其說雙重捲紙之效果， 不如說專利文獻卜2之技術係藉由單純地設置内側捲紙而 謀求污損之減低。 專利文獻3係揭示：關於一種在副流煙具有風味之吸 菸品，在雙重捲紙之内層與外層之間保持膠囊香料，外側 3 322239 201204271 捲紙係設為200CU以上之透氣度，内侧捲紙係設為比外侧 捲紙為小之透氣度。專利文獻3係使香味成分從設置在雙 重捲紙間之膠囊香料蒸發，以促進穿透捲紙之擴散。 然而，專利文獻3並未考慮到液體之浸透及污損，因 此内側捲紙與外侧捲紙之透氣度、及雙重捲紙對液體之浸 透及污損的影響亦不明。 (先前專利文獻） (專利文獻） (專利文獻1):日本發明專利第2660876號公報 (專利文獻2):美國發明專利第5143099號說明書 (專利文獻3):日本發明專利第4024249號公報 【發明内容】 本發明之目的在於：在以囊袋或捲紙包覆菸草絲之菸 草製品中，防止液體對囊袋或捲紙之污損。 依據本發明，提供一種以囊袋或捲紙包覆菸草絲之菸 草製品，其特徵為··前述囊袋或捲紙係具有内層及外層， 前述外層之紙的透氣度係比前述内層之紙的透氣度大。 【實施方式】 依據本發明，係藉由以具有内層及外層之雙層的囊袋 或捲紙包覆菸草絲，並使前述外層的透氣度比前述内層的 透氣度大，以防止液體對囊袋或捲紙之污損。 第1圖係本發明之菸草製品的剖面圖。如第1圖所 示，本發明之菸草製品1係以包含内層11及外層12之雙 層的囊袋或捲紙包覆菸草絲10者。外層12的透氣度係比 4 322239 201204271 内層11的透氣度大。這意指外層12之細孔徑d2比内層 11之細孔徑Di大。以下，說明利用本發明之構成可防止 液體對囊袋或捲紙之污損的理由。其理由係如前所述，可 由因毛細管力產生液體對囊袋或捲紙之浸透的現象來說 明。 第1，當細孔被液體完全弄濕時，雖會因毛細管力而 產生液體之浸透，但只要細孔不被液體弄濕，即可防止液 體之浸透。如第1圖所示，當外層12之細孔徑D2比内層 11之細孔徑D!為大時，細孔被液體弄濕之可能性會變低， 因此可防止液體之浸透，因而可防止污損。 第2 ’紙之細孔徑越小’毛細管力越大，因此浸透距 離會變大。在組合細孔徑小之内層與細孔徑大之外層時， 内層係具有保水功能，在液體充分地充满在内層之細孔内 後’直到超過内層之細孔的毛細管力才開始浸透至細孔徑 較大之外層。相反地，在組合細孔徑大之内層與細孔徑小 之外層時，由於内層之較大細孔的毛細管力較小，因此液 體容易超過小的毛細管力，且液體容易從内層浸透至外 層。如上所述，在組合細孔徑小之内層與細孔徑大之外層 者’因内層之保水效果而使液體難以浸透，而可防止液體 之污損。 此外’紙之細孔徑越大，毛細管力越小、亦即液體之 抽吸高度會變小之相關的理論考察係如中西等化學工學論 文集、14 (6)、pp.794-802、1988 所示。 在本發明中’在内層與外層之間置入間隔件且在内層 322239 5 201204271 與外層之間設置間隙，或塗覆上漿劑並增大接觸角，藉此 可更有效地防止液體之污損。 在本發明中，由於因紙之雙層化而對污損之防止係取 決於細孔徑’因此内層及外層之紙的種類亦可為不織布或 機械抄和紙等任一者，並無特別限定。 本發明之防止對囊袋或捲紙之污損的技術係利用毛 細管力現象者，僅在雙層構造之囊袋或捲紙為乾燥時成 立。而無須考慮例如在SNUS使用時，當口中含有SNUS 且雙層構造之整個囊袋弄濕時，囊袋成分溶出。 在此，污損係液體朝紙剎面方向浸透而產生。已知液 體之浸透係由於紙之細孔構造所致（M· Miyauchi and Y. Nakanishi，Drying Technology，24，3卜36，2006)。另 一方面，紙之透氣度亦取決於紙之細孔構造。 因此，利用日本特開2007-255891或上述文獻（Drying Technology，24，31-36，2006)記載之液體浸透度檢查裝 置，求出液體浸透1張紙之剖面所需之時間。另一方面， 利用 CORESTA Recommended Method NO.40 記載之方法 測量透氣度。透氣度係在紙之兩面的差壓為lkPa時，以 cm3/min之單位表示通過面積1 cm3之氣體的流量。將 lcm3/min 稱為 1CU (CORESTA UNIT)。 第2圖係顯示紙之透氣度、與液體浸透1張紙之剖面 所需之時間之關係圖。如第2圖所示，當紙之透氣度變高 時，液體浸透1張紙之剖面所需之時間會變短。如此，透 氣度與液體浸透張紙之剖面所需之時間係具有相關。依 6 322239 201204271 據上述文獻所記載之理論式得知，液體浸透1張紙之剖面 所需之時間係取決於空隙率、亦即細孔徑。 在本發明中，就與使外層之細孔徑比内層之細孔徑大 者等效的關係而言，係規定使外層之透氣度比内層之透氣 度大。 在本發明中，為了控制紙之透氣度，亦可調節紙的規 格或製造程序，亦可在紙形成開孔。為了在捲紙之紙層内 調整ΙΟμιη以下之空隙的分佈，已知有調整碳酸鈣之添加 量的方法、調整紙漿之叩解度的方法、及調整在抄紙步驟 中之脫水速度的機械性方法等。此外，為了在紙形成開孔， 可利用以一般之手法對香菸捲紙機械性或電氣性進行穿孔 的方法。具體而言，可利用以針狀之齒模具進行衝壓開孔 之機械性方法、電暈放電之電氣方法、及一面使捲紙連續 行進一面藉由旋轉截波器將從雷射振盪器輸出之連續光束 照射成脈衝狀並進行開孔的方法等。 (實施例） 為了容易且迅速地判斷雙層構造之囊袋之污損的減 低效果，係準備水分含有率高且自由水多的菸草絲，以製 作SNUS而供試驗用。 (1)對菸草絲秤重20g，並以玻璃製喷霧器添加水 20g。在100°C下對所得之菸草絲進行1小時之乾燥。將減 量份視為水分，算出於草絲中之水分含有率時，為5 3 % wet basis。 另一方面，使用透氣度40000CU以上（Filtrona製、 7 322239 201204271 在PPM300下為測量限度以上）至透氣度9CU為止者作為 紙。表1係顯示紙之物性值。 依據前述文獻（Drying Technology，24 ’ 31-36 ’ 2006 ) 記載之方法，即使是浸透速度最慢之紙J，液體浸透1張紙 之剖面所需之時間為38秒。 表1 樣本 透氣度（cu) 秤重（g/m2) A 不可測量 40000以上 30 B 29400 21 C 21600 26.5 D 10900 24 E 108 27 F 84 28 G 21 24 Η 20 15 I 10 63 J 9 36 將表1記載之紙切斷成長方形（約25mmx約30mm )， 從中心對折並固定兩側邊以製作袋（寬度約18mmx高度約 12mm)，將上述水分含有率高之菸草絲280±10mg放入該 袋中，並固定剩餘之側邊以製作樣本。紙之固定係考慮迅 速而以釘書機進行。表2係顯示紙之組合。 8 322239 201204271 比較例 tnm 比較例 實施例3(土層 > 内層） 比較例3(外廣客内層） 實施例4(夕上層 > 内層） 比較例4(外層客内層） " --- 接者，以下述方式評價污損之發生狀況 置玻璃板（0 42mm、15.75g)，藉由細g =::鐘荷重’以使内層之紙直接接觸在存:於終 以保存。在經二將樣本放人密封瓶並予 外層表面it行03#攝$。帛m师丨樣本，朗樣本之 爲本圖係示意性顯示在囊袋之外 層表面產生污損之狀況圖。在 展表卜 在囊袋20之外芦矣㈣m 3圖中，以斜線顯示產生 Ί m 、'可才貝21。接著，利用WinROOF(ver. 圖像解析二谷，份有限公司)對所獲得之照片圖像進行 圖像解析，以求出污損產生 ,面積率。圖像解析係以下述方 式進仃。首先，進行RGB色抽 、 1 柚出之二值化處理，切出污損 區域，接著求出樣本總面積相對於經二值化處理之區域之 面積的比率，作為汽損面積率。 322239 9 201204271 第4圖係顯示針對實施例1至4及比較例1至4之樣 本所獲得之污損面積率的圖。由第4圖得知，外層使用透 氣度比内層高之紙的樣本之污損的產生，係比外層使用透 氣度比内層低之紙的樣本、或外層使用透氣度與内層相同 之紙的樣本更少。此外’如預期地，在捲紙之基重不同之 紙Η與I之間並未發現與其他樣本有較大之差異，且紙之 基重亦無特別關係。 關於雙層構造之紙的内層與外層之組合，得知以下事 貫。當外層使用紙Α之類的不織布時’内層係以配置透氣 度30000CU以下之紙為佳。當外層使用透氣度looney 以下之紙時，内層係以使用透氣度100CU以下之紙為佳。 另一方面，在使用透氣度9CU之紙J時，細孔徑小，浸透 距離會變大。因此，如實施例在施加荷重且水分含有率高 之菸草絲中的自由水可自由地移動的條件下，由於充分地 浸透細孔徑小之紙’且紙J之保水效果亦減少，因此若内 外層之透氣度沒有很大之差距，則本發明之利用紙之雙層 化所致之污損減低效果極低。 θ 此外’使用在上述實驗之透氣度高之紙的透明性高， 因此為了藉由污損之減低而使外觀品質提升，較佳^ _ 填料之添加等而使透氣度高之紙不透明化。 (2) SNUS用囊袋一般而言係以使用不織布之類的透 氣度40000CU以上（Filtrona製、在PPM300下為測息 試驗用 度以上）之情形較多。因此，將具有該透氣度位準之紙供 322239 10 201204271 然而，若透氣度過高時，在Filtrona製、PPM300下， 無法測量用以求出透氣度之壓力與流量之關係。此時，以 下述方式進行替代性之測量，以求出透氣度之基準值。首 先，除了將紙重疊二張之外，依照測量準則測量透氣度。 即使如上方式將紙重疊二張，亦超過屬於測量裝置之測量 限度流量的80L/min。因此，由以80L/min以下之流量所 獲得之壓力與流量之關係算出替代透氣度基準值。在算出 替代透氣度基準值之際得知，壓力與流量之關係係具有充 分之線形性，且可正確地判斷供試用之紙樣本之透氣度的 大小。因此亦針對上述之紙A至D測量替代數值基準值。 表3係顯示紙之物性值。 表3 樣本 透氣度(cu) 替代透氣度 秤重(g/m2) K 無法測量 40000以上 51900 23 L 47100 23 Μ 46400 31 Ν 45200 30 0 40300 27 Ρ 39700 28 A 47600 30 B 29400 18100 21 C 21600 13000 26.5 D 10900 5700 24 使用表3記載之紙，與上述方式同樣地製作樣本。表 4係顯示紙之組合。 11 322239 201204271201204271 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a tobacco product in which tobacco yarn is coated with a pouch or a roll of paper. [Prior Art] The SNUS may be stained in the pouch after it is manufactured and delivered to the user. When the SNUS bag is stained, there is a problem that the user holds the impression that the quality of the product is low, and therefore it is expected to suppress the stain as much as possible. The same problem is also caused by the fouling in the cigarette paper. The stain is produced by infiltrating a component of the tobacco yarn covered by the pouch or the roll paper in a liquid form in a pouch or a roll paper. Patent Documents 1 and 2 disclose that a double roll paper is used in order to reduce the contamination of cigarettes, and a roll paper having fine holes, a low basis weight, and a high air permeability is used as the inner roll paper. Further, the technical content of suppressing surface wettability caused by application of a sizing agent such as an alkyl ketene dimer is also described. The impregnation of the fouling component is caused by the capillary force. The larger the pore diameter, the smaller the capillary force, and the smaller the pore diameter, the larger the penetration distance. As shown in Patent Documents 1 and 2, when the pore diameter of the inner roll paper is larger than the outer diameter of the outer roll paper, if the stain component permeates the inner roll paper, the stain component is also saturated with the outer roll paper. Therefore, the effect of the double-roll paper is not so much as the technique of the patent document 2 is to reduce the amount of staining by simply providing the inner roll paper. Patent Document 3 discloses that a smoking article having a flavor in a sidestream smoke retains a capsule fragrance between the inner layer and the outer layer of the double roll paper, and the outer side 3 322239 201204271 roll paper is set to have a gas permeability of 200 CU or more, and the inner side roll The paper system is set to have a smaller air permeability than the outer roll paper. Patent Document 3 evaporates the flavor component from the capsule fragrance disposed between the double rolls to promote the diffusion of the penetration paper. However, Patent Document 3 does not consider the penetration and staining of the liquid, and therefore the air permeability of the inner and outer rolls, and the influence of the double roll on the penetration and staining of the liquid are also unknown. (Patent Document 1) (Patent Document 1): Japanese Patent No. 2660876 (Patent Document 2): US Patent No. 51,430,99 (Patent Document 3): Japanese Patent No. 4024249 (Invention) SUMMARY OF THE INVENTION The object of the present invention is to prevent fouling of liquid on a pouch or roll paper in a tobacco product in which tobacco yarn is coated with a pouch or roll paper. According to the present invention, there is provided a tobacco product in which a tobacco yarn is coated with a pouch or a roll paper, wherein the pouch or the roll paper has an inner layer and an outer layer, and the outer layer of the paper has a gas permeability higher than the inner layer paper. The air permeability is large. [Embodiment] According to the present invention, a tobacco yarn is coated by a bladder or a roll paper having a double layer of an inner layer and an outer layer, and the air permeability of the outer layer is made larger than that of the inner layer to prevent liquid from being sac. The stain of the bag or roll paper. Figure 1 is a cross-sectional view of a tobacco product of the present invention. As shown in Fig. 1, the tobacco product 1 of the present invention is coated with a tobacco pouch 10 in a double or double layer of inner layer 11 and outer layer 12. The air permeability of the outer layer 12 is greater than that of the inner layer 11 of 4 322239 201204271. This means that the pore diameter d2 of the outer layer 12 is larger than the pore diameter Di of the inner layer 11. Hereinafter, the reason why the liquid can be prevented from being stained on the pouch or the roll paper by the constitution of the present invention will be described. The reason for this is as described above, and it can be explained by the phenomenon that the liquid is caused to permeate the pouch or the roll paper by the capillary force. First, when the pores are completely wetted by the liquid, the liquid permeates due to the capillary force, but as long as the pores are not wetted by the liquid, the penetration of the liquid can be prevented. As shown in Fig. 1, when the pore diameter D2 of the outer layer 12 is larger than the pore diameter D! of the inner layer 11, the possibility that the pores are wetted by the liquid becomes low, so that the penetration of the liquid can be prevented, thereby preventing the stain from being contaminated. damage. The smaller the pore diameter of the 2'th paper, the larger the capillary force, so the penetration distance becomes larger. When the outer layer having a small pore diameter and the outer layer having a large pore diameter are combined, the inner layer has a water retaining function, and after the liquid is sufficiently filled in the pores of the inner layer, the capillary force until the pores exceeding the inner layer begin to permeate to the pore diameter. Large outer layer. On the contrary, when the inner layer having a large pore diameter and the outer layer having a small pore diameter are combined, since the capillary force of the larger pores of the inner layer is small, the liquid easily exceeds the small capillary force, and the liquid easily permeates from the inner layer to the outer layer. As described above, in the case where the inner layer having a small pore diameter and the outer layer having a large pore diameter are combined, the liquid is hard to permeate due to the water retaining effect of the inner layer, and the fouling of the liquid can be prevented. In addition, the larger the pore diameter of the paper, the smaller the capillary force, that is, the relevant theoretical investigation of the liquid suction height is as in the Chinese and Western Chemical Engineering Proceedings, 14 (6), pp. 794-802, Shown in 1988. In the present invention, a spacer is placed between the inner layer and the outer layer and a gap is provided between the inner layer 322239 5 201204271 and the outer layer, or a sizing agent is applied and the contact angle is increased, thereby preventing the liquid from being more effectively prevented. damage. In the present invention, since the prevention of the stain due to the double layer of the paper depends on the pore diameter, the type of the inner layer and the outer layer of the paper may be either non-woven fabric or mechanical copy paper or the like, and is not particularly limited. The technique for preventing fouling of a pouch or roll paper of the present invention utilizes a capillary tube phenomenon to be established only when the pouch or web of the two-layer structure is dry. There is no need to consider, for example, when SNUS is used, when the SNUS is contained in the mouth and the entire pouch of the two-layer structure is wetted, the pouch component is dissolved. Here, the fouling liquid is generated by permeating in the direction of the paper brake surface. It is known that the impregnation of liquid is due to the pore structure of the paper (M. Miyauchi and Y. Nakanishi, Drying Technology, 24, 3b 36, 2006). On the other hand, the air permeability of the paper also depends on the pore structure of the paper. Therefore, the liquid permeation inspection apparatus described in JP-A-2007-255891 or the above-mentioned document (Drying Technology, 24, 31-36, 2006) is used to determine the time required for the liquid to permeate the profile of one sheet of paper. On the other hand, the air permeability was measured by the method described in CORESTA Recommended Method No. 40. The air permeability is a flow rate of a gas passing through an area of 1 cm3 in units of cm3/min when the differential pressure on both sides of the paper is 1 kPa. Let lcm3/min be called 1CU (CORESTA UNIT). Fig. 2 is a graph showing the relationship between the air permeability of the paper and the time required for the liquid to permeate the profile of one sheet of paper. As shown in Fig. 2, when the air permeability of the paper becomes high, the time required for the liquid to permeate the profile of one sheet of paper becomes shorter. Thus, the degree of venting is related to the time required for the liquid to penetrate the profile of the sheet. According to the theoretical formula described in the above documents, the time required for the liquid to permeate the profile of one sheet of paper depends on the void ratio, that is, the pore diameter. In the present invention, in terms of the relationship that the pore diameter of the outer layer is larger than the pore diameter of the inner layer, the air permeability of the outer layer is made larger than the gas permeability of the inner layer. In the present invention, in order to control the air permeability of the paper, the specification or manufacturing procedure of the paper may be adjusted, and the opening may be formed in the paper. In order to adjust the distribution of the voids below ΙΟμηη in the paper layer of the roll paper, a method of adjusting the amount of addition of calcium carbonate, a method of adjusting the degree of decomposing of the pulp, and a mechanical method of adjusting the rate of dehydration in the papermaking step are known. . Further, in order to form the opening in the paper, a method of perforating the mechanical or electrical properties of the cigarette paper by a general method can be utilized. Specifically, it is possible to use a mechanical method of punching a hole in a needle-shaped tooth mold, an electrical method of corona discharge, and outputting a roll paper from a laser oscillator while continuously traveling while rotating the cutter. A method in which a continuous light beam is irradiated into a pulse shape and an opening is performed. (Example) In order to easily and quickly determine the effect of reducing the fouling of the bladder of the double-layer structure, it is necessary to prepare a tobacco yarn having a high water content and free water to produce SNUS for testing. (1) The tobacco silk was weighed 20 g, and 20 g of water was added using a glass sprayer. The obtained tobacco silk was dried at 100 ° C for 1 hour. The reduced amount was regarded as water, and when the water content in the grass was calculated, it was 53% wet basis. On the other hand, paper having a gas permeability of 40,000 CU or more (manufactured by Filtrona, 7 322239 201204271, which is equal to or higher than the measurement limit under PPM300) to a gas permeability of 9 CU is used. Table 1 shows the physical property values of paper. According to the method described in the aforementioned document (Drying Technology, 24' 31-36 ' 2006), even for the paper J having the slowest soaking speed, the time required for the liquid to permeate the cross section of one sheet of paper is 38 seconds. Table 1 Sample permeability (cu) Weighing (g/m2) A Cannot measure above 40000 30 B 29400 21 C 21600 26.5 D 10900 24 E 108 27 F 84 28 G 21 24 Η 20 15 I 10 63 J 9 36 The paper described in 1 is cut into a rectangular shape (about 25 mm x about 30 mm), folded in half from the center, and fixed on both sides to prepare a bag (having a width of about 18 mm x a height of about 12 mm), and the tobacco wire having a high moisture content of 280 ± 10 mg is placed in the paper. In the bag, and fix the remaining sides to make a sample. The fixing of the paper is carried out with a stapler in consideration of rapid speed. Table 2 shows the combination of papers. 8 322239 201204271 Comparative Example tnm Comparative Example 3 (soil layer > inner layer) Comparative Example 3 (outer Guangke inner layer) Example 4 (Early upper layer > inner layer) Comparative Example 4 (outer layer inner layer) " --- In the following manner, the occurrence of the stain was evaluated in the following manner. A glass plate (0 42 mm, 15.75 g) was placed, and the inner layer of paper was directly contacted by the fine g =:: clock load to be stored at the end. In the second pass, put the sample in a sealed bottle and give it to the outer surface. The sample of the 帛m teacher, the figure of the lang sample is a diagram showing the condition of the fouling on the surface of the outer layer of the capsular bag. In the reed (4) m 3 diagram outside the pouch 20, Ί m and '可才贝 21 are produced by oblique lines. Next, the obtained photographic image was subjected to image analysis using WinROOF (Ver. Image Analysis Ergu Co., Ltd.) to obtain the stain generation rate and the area ratio. Image analysis is performed in the following manner. First, binarization processing of RGB color extraction and 1 pomelo extraction is performed, and the stained area is cut out, and then the ratio of the total area of the sample to the area of the binarized area is obtained as the vapor loss area ratio. 322239 9 201204271 Fig. 4 is a graph showing the area ratio of the stain obtained for the samples of Examples 1 to 4 and Comparative Examples 1 to 4. It can be seen from Fig. 4 that the outer layer is made of a sample having a higher air permeability than the inner layer, and the sample is made of a sample having a lower air permeability than the inner layer or a sample having the same air permeability as the inner layer. less. In addition, as expected, there was no significant difference between the paper and the I with different basis weights of the rolled paper, and the basis weight of the paper was not particularly relevant. Regarding the combination of the inner layer and the outer layer of the paper of the two-layer structure, the following matters were known. When the outer layer is made of a non-woven fabric such as paper pulp, the inner layer is preferably a paper having a gas permeability of 30,000 CU or less. When the outer layer is made of paper having a gas permeability of looney or less, the inner layer is preferably a paper having a gas permeability of 100 CU or less. On the other hand, when paper J having a gas permeability of 9 CU is used, the pore diameter is small and the penetration distance becomes large. Therefore, as in the case where the free water in the tobacco yarn to which the load is applied and the moisture content is high is freely movable, since the paper having a small pore diameter is sufficiently impregnated and the water retaining effect of the paper J is also reduced, the inside and outside are also reduced. There is no large difference in the air permeability of the layer, and the effect of reducing the fouling caused by the double layering of the paper of the present invention is extremely low. θ In addition, the paper having a high air permeability in the above-mentioned experiment has high transparency, and therefore, in order to improve the appearance quality by the reduction of the stain, it is preferable to add a filler such as a filler to make the paper having high air permeability opaque. (2) The SNUS bag is generally used in a case where the permeable degree of the non-woven fabric is 400,000 CU or more (manufactured by Filtrona and the PMM300 is more than the measurement test). Therefore, paper having the gas permeability level is supplied 322239 10 201204271 However, when the air permeability is too high, the relationship between the pressure and the flow rate for determining the gas permeability cannot be measured under the manufacture of Filtrona and PPM300. At this time, an alternative measurement was performed in the following manner to obtain a reference value of the gas permeability. First, in addition to stacking two sheets of paper, the air permeability is measured in accordance with the measurement criteria. Even if the paper is overlapped two times as described above, it exceeds 80 L/min of the measurement limit flow rate belonging to the measuring device. Therefore, the reference value of the replacement air permeability is calculated from the relationship between the pressure and the flow rate obtained at a flow rate of 80 L/min or less. When calculating the substitute gas permeability reference value, it is known that the relationship between pressure and flow rate is sufficiently linear, and the air permeability of the paper sample for test can be correctly judged. Therefore, the substitute numerical reference values are also measured for the papers A to D described above. Table 3 shows the physical property values of the paper. Table 3 Sample Air Permeability (cu) Alternative Air Permeability Weighing (g/m2) K Cannot measure above 40000 51900 23 L 47100 23 Μ 46400 31 Ν 45200 30 0 40300 27 Ρ 39700 28 A 47600 30 B 29400 18100 21 C 21600 13000 26.5 D 10900 5700 24 Using the papers shown in Table 3, samples were prepared in the same manner as described above. Table 4 shows the combination of papers. 11 322239 201204271
表4 外層 内層 實施例5 (外層〉内層） 紙_K，A，P 紙-B 比較例5 (外層$内層） 紙-B 紙-K，A，P 實施例6 (外層〉内層） 紙-Κ，Α，Ρ 紙-C 比較例6(外層S内層） 紙-C 紙-Κ,Α,Ρ 實施例7 (外層〉内層） 紙-Κ 紙-Ρ 比較例7 (外層S内層） 紙-Ρ 紙_Κ 實施例8 (外層 > 内層） 紙-Μ 紙-Ρ 比較例8 (外層$内層） 紙-Ρ 紙，Μ 實施例9 (外層 > 内層） 紙-K，A，L，M，N，0，P 紙-Β 紙-K,A，L，M,N，0，P 紙-C 接著，與上述方式同樣地，使内層之紙直接接觸在存 在於菸草絲中之自由水後，對樣本之外層表面進行照片攝 影，藉由圖像解析求出污損面積率。第5圖係顯示針對實 施例5至8及比較例5至8之各組合的樣本所獲得之污損 面積率的圖。由第5圖得知，即使外層使用由不織布所構 成之透氣度高的紙時，外層使用透氣度比内層高之紙的樣 本之污損的產生，係比外層非使用透氣度比内層高之紙的 樣本為少。第6圖係顯示針對實施例9之各組合的樣本（亦 即透氣度20000CU以上的紙之組合的樣本）所獲得之污損 面積率的圖。第6圖所示之污損面積率係明顯地遠比第4 圖及第5圖所示之比較例的污損面積率低。因此，得知即 12 322239 201204271 使在透氣度20000CU以上之紙的組合中，外層使用透氣度 比内層高之紙的樣本之污損的產生較少。 觀察針對實施例5至9及比較例5至9之各組合進行 攝影之照片的結果，即使外層使用由不織布所構成之透氣 度高之紙時，外層使用透氣度比内層尚之紙的樣本之污損 的產生，係比外層非使用透氣度比内層尚之紙的樣本更少。 關於雙層構造之紙的内層與外層之組合，得知以下事 實。當外層使用透氣度30000CU以上的不織布時，内層係 以配置透氣度30000CU以下為佳’且以且透氣度2〇〇〇〇cu 以下之紙為更佳。 再者，由實施例7、8及比較例7、8之比較，並以替 代透氣度基準值進行之評價得知以下事項。亦即，如實施 例8及比較例8，外層及内層使用不織布，在兩者之間替 代透氣度沒有很大差異時’在施加荷重且水分含有率高之 菸草絲中的自由水可移動的條件下，污損之減低效果低。 相對於此，如實施例7及比較例7，即使外層及内層使用 不織布時，若在兩者之間替代透氣度有10000以上之差異 時，可獲得充分之污損的減低效果。 在實施例7及比較例7中，替代透氣度之差距為 12200CU，在實施例8及比較例8中，替代透氣度之差距 為6700CU。在此，第7圖係針對紙-B、C、D顯示透氣度 與替代透氣度之關係圖。利用由第7圖所得之關係時，在 實施例7及比較例7中，透氣度之差距係相當於21000CU’ 在實施例8及比較例8中，透氣度之差距係相當於 13 322239 201204271 11000CU。因此’即使外層及内層使用不織布時若在兩 者之間透氣度彳2_0CU以上之差距時，可獲得充分之污 損的減低效果。 / 【圖式簡單說明】 第1圖係本發明之菸草製品的剖面圖。 第2圖係顯示紙之透氣度、與液體浸透1張紙之剖面 所需的時間之關係圖。 、第3圖係示意性顯示在囊袋之外層表面產生污損之狀 況的圖。 第4圖係顯示針對實施例1至4及比較例1至4之樣 本所獲得之污損面積率的圖。 第5圖係顯示針對實施例5至8及比較例5至8之樣 本所獲得之污損面積率的圖。 第6圖係顯示針對實施例9之樣本所獲得之污損面積 率的圖。 第7圖係針對紙-B、C、D顯示透氣度與替代透氣度 之關係圖。 [ 主要元件符號說明】 1 菸草製品 10 終草絲 11 内層 12 外層 20 囊袋 21 污損 、細孔徑 14 322239Table 4 Outer inner layer Example 5 (outer layer > inner layer) Paper_K, A, P Paper-B Comparative Example 5 (outer layer inner layer) Paper-B paper-K, A, P Example 6 (outer layer > inner layer) Paper - Κ,Α,Ρ Paper-C Comparative Example 6 (outer layer S inner layer) Paper-C paper-Κ, Α, Ρ Example 7 (outer layer> inner layer) Paper-Κ Paper-Ρ Comparative Example 7 (outer layer S inner layer) Paper- Ρ Paper_Κ Example 8 (outer layer > inner layer) Paper-Μ Paper-Ρ Comparative Example 8 (outer layer/inner layer) Paper-Ρ paper, Μ Example 9 (outer layer > inner layer) Paper-K, A, L, M, N, 0, P Paper-Β Paper-K, A, L, M, N, 0, P Paper-C Next, in the same manner as described above, the paper of the inner layer is directly contacted in the freedom existing in the tobacco yarn. After the water, the surface of the outer layer of the sample was photographed, and the area ratio of the stain was determined by image analysis. Fig. 5 is a graph showing the area ratio of the stain obtained for the samples of the respective combinations of Examples 5 to 8 and Comparative Examples 5 to 8. It can be seen from Fig. 5 that even if the outer layer is made of a paper having a high air permeability composed of a non-woven fabric, the outer layer is made of a sample having a higher air permeability than the inner layer, and the outer layer is not more air-permeable than the inner layer. There are fewer samples of paper. Fig. 6 is a graph showing the area ratio of the stain obtained for the samples of the respective combinations of Example 9 (i.e., the samples of the combination of paper having a gas permeability of 20,000 CU or more). The fouling area ratio shown in Fig. 6 is significantly lower than the fouling area ratio of the comparative examples shown in Figs. 4 and 5. Therefore, it is known that 12 322239 201204271 in the combination of paper having a gas permeability of 20,000 CU or more, the outer layer is less likely to be stained by the sample having a higher air permeability than the inner layer. The results of photographs taken for the respective combinations of Examples 5 to 9 and Comparative Examples 5 to 9 were observed. Even when the outer layer was made of a paper having a high air permeability composed of a non-woven fabric, the outer layer was stained with a sample having a gas permeability higher than that of the inner layer. The loss is produced less than the outer non-use of air permeability than the inner layer of paper. Regarding the combination of the inner layer and the outer layer of the paper of the two-layer structure, the following facts were known. When the outer layer is made of a non-woven fabric having a gas permeability of 30,000 CU or more, the inner layer is preferably a paper having a gas permeability of 30,000 CU or less and a paper having a gas permeability of 2 〇〇〇〇 cu or less. Further, from the comparison of Examples 7 and 8 and Comparative Examples 7 and 8, the following matters were obtained by evaluation based on the reference value of the gas permeability. That is, as in Example 8 and Comparative Example 8, the outer layer and the inner layer were made of a non-woven fabric, and when the air permeability was not greatly different between the two, the free water in the tobacco yarn to which the load was applied and the moisture content rate was high was movable. Under the condition, the effect of reducing the stain is low. On the other hand, in the case of using the nonwoven fabric in the outer layer and the inner layer as in the case of the seventh embodiment and the comparative example 7, when the difference in the air permeability is 10000 or more, a sufficient effect of reducing the stain can be obtained. In Example 7 and Comparative Example 7, the difference in the air permeability was 12,200 CU, and in Example 8 and Comparative Example 8, the difference in the air permeability was 6,700 CU. Here, Fig. 7 shows a relationship between the air permeability and the alternative air permeability for the papers - B, C, and D. When the relationship obtained from Fig. 7 is used, in Example 7 and Comparative Example 7, the difference in air permeability is equivalent to 21,000 CU'. In Example 8 and Comparative Example 8, the difference in air permeability is equivalent to 13 322239 201204271 11000 CU. . Therefore, even if the outer layer and the inner layer are not woven, if the air permeability between the two is 彳2_0CU or more, a sufficient reduction effect of the stain can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a tobacco product of the present invention. Fig. 2 is a graph showing the relationship between the air permeability of the paper and the time required for the liquid to permeate the profile of one sheet of paper. Fig. 3 is a view schematically showing a state in which the surface of the outer layer of the pouch is stained. Fig. 4 is a graph showing the area ratio of the stain obtained for the samples of Examples 1 to 4 and Comparative Examples 1 to 4. Fig. 5 is a graph showing the area ratio of the stain obtained for the samples of Examples 5 to 8 and Comparative Examples 5 to 8. Fig. 6 is a graph showing the area ratio of the stain obtained for the sample of Example 9. Figure 7 shows the relationship between air permeability and alternative air permeability for papers - B, C, and D. [ Description of main component symbols] 1 Tobacco products 10 Final grass 11 Inner layer 12 Outer layer 20 Pouch 21 Defaced, fine hole diameter 14 322239