200800735 (1) 九、發明說明 【發明所屬之技術領域】 本發明，係關於用以包裝滾筒狀地捲繞在圓筒狀芯子 上的保鮮膜之包裝容器，特別關於包裝容器中所使用的切 斷刀刃。 【先前技術】 • 在以往，已知有各種形式的保鮮膜用包裝容器。它們 大多是厚紙製的，且由收納被捲繞成滾筒狀的保鮮膜之容 器主體；及與該容器主體一體地設置之蓋體所構成。然後 ，從容器中拉出的保鮮膜，係藉由安裝在蓋體的前面壁之 背面的鋸齒狀之切斷刀刃來切斷。 作爲這種切斷刀刃，爲了能夠容易地切斷薄膜，使用 切斷刀刃的中間部比側部區域更接近容器的底邊之V字 狀形狀的切斷刀刃，來代替直線狀形狀的切斷刀刃。該形 • 狀，係因從切斷刀刃的最突出之部分開始切斷保鮮膜’故 爲用以確實且容易地進行切斷之形狀。 _ 又，切斷刀刃一般使用金屬製的，但近年來考慮到環 _ 境問題，開始硏究紙製或樹脂製的非金屬製之切斷刀刃。 可是，非金屬製之切斷刀刃，係因難以發揮金屬製的 切斷刀刃那樣良好的切斷性，尤其對於富有伸縮性的聚乙 烯、聚丙烯、聚偏二氯乙烯等之薄膜的切斷需要較大的力 量，故隨著使用容器或者齒會受到損傷，有時會産生使用 上的問題。爲了改善這一點，例如如下述的專利文獻1〜4 -5- 200800735 (2) 所揭示，嘗試著使切斷刀刃的中央區域之齒比其側部的區 域之齒較大，或者相反地使切斷刀刃的中央區域之齒比其 側部的區域之齒較小，或者使齒的前端鋒利，來使切斷性 提高。 〔專利文獻1〕日本特開2006-2 1 292號公報 〔專利文獻2〕日本登記新型第2547868號公報 〔專利文獻3〕日本實開平7- 1 1 527號公報 φ 〔專利文獻4〕日本特開2 0 0 6 - 1 8 8 2 8 5號公報 【發明內容】 〔發明所欲解決之問題〕 然而，根據本發明者等之硏究，上述的專利文獻1之 切斷刀刃，係使紙製鋸齒刃的各齒之前端鋒利，但各齒的 大小全部相同，所以切斷性有問題。另外，在上述的專利 文獻2以及3的切斷刀刃中，相較於側部區域，中央區域設 • 置有相當大的大齒，所以耐久性和切斷時的感覺（官能性） 等有問題。另外，在上述的專利文獻4的切斷刀刃中，在 , 配置於中央部的小刃牙和配置於兩端部的大刃牙之間設置 有切換刃牙，但切斷時的感覺（官能性）還不充分。如此情 況下，被要求提供切斷性能更提高的非金屬製之切斷刀刃 〇 因此，本發明的第1目的’係在於提供一種能夠容易 且確實地切斷保鮮膜等之滾筒狀被包裝物的非金屬製之切 斷刀刃。另外，本發明的第2目的，係在於提供一種具備 -6- (3) 200800735 如此非金屬製的切斷刀刃之包裝容器。 〔用以解決問題之手段〕 爲達成上述目的，反復進行銳意硏究之結果，發現保 鮮膜等的切斷性係與構成V字狀的切斷刀刃之齒的尺寸 、齒尖角度、齒間間距、齒的形狀等密切相關，並受其影 響。 φ 本發明係基於這樣的見解而完成的，本發明之切斷刀 刃，係針對安裝在用以包裝保鮮膜等之滾筒狀被包裝物之 包裝谷器中的盖體之即面壁的背面之由非金屬所構成的V 字狀之切斷刀刃，其特徵爲： (A)由中央區域、及配置在上述中央區域的兩側之側 部區域所構成·， (b)上述中央區域，係具備有複數個第1齒、及比上述 第1齒較爲小的複數個第2齒； ® (c)將上述第1齒中的1個配置在上述中央區域的v字 之頂點部，並且將其他的第1齒以夾著上述頂點部的第1齒 . 之方式以預定的間隔配置； 、 （d)將上述第2齒配置在上述第1齒之間； (e) 連結上述中央區域中的上述其他的第1齒之齒尖與 上述頂點部的第1齒之齒尖的第1直線，係比上述中央區域 中的上述第2齒之齒尖，位於更遠離上述蓋體的前面壁之 位置； (f) 上述側部區域，係具備有複數個側部齒； 200800735 (4) (g)與上述第1直線平行，且連結上述第2齒的齒尖之 第2直線，係通過上述側部區域中的上述側部齒之齒尖， 或者比上述側部齒之齒尖，位於更遠離上述蓋體的前面壁 之位置。 藉由設置上述的結構之中央區域，作爲媒介的保鮮膜 等之切斷，係被分割爲由中央區域進行的切斷最初的“刺 穿”階段；及其後的由側部區域進行的“切開”階段之兩 # 階段。更且，“刺穿”階段，係被分割爲由第1齒進行的 刺穿工序；及由第2齒進行的刺穿工序之兩工序。切斷最 初，因爲與保鮮膜接觸的齒係只有第1齒，所以對於刺穿 所需要的力量係很小即可解決。又，只有第1齒的話，由 於第1齒間的谷部之阻力，對於保鮮膜之刺穿需要力量， 但藉由在以第1齒刺穿後第2齒貫穿保鮮膜，可順利地刺穿 保鮮膜。 又，側部區域，係具備有交互地配置之大小兩種的側 ♦ 部齒爲較理想。 藉由這樣地在側部區域上交互地配置大小兩種之側部 齒，在從“刺穿”階段往“切開”階段之轉移時以及“切開”階 段時，能夠使與保鮮膜同時接觸的側部齒之個數減少。因 此，與具備尺寸單一的複數個側部齒之情況相比，可將從 ‘‘剌穿”階段往“切開”階段之轉移更順利化，並且能夠以更 小的力量來切開切斷保鮮膜。 又，本發明之切斷刀刃，係在側部區域的外側之端部 ，包含比側部區域的外側之端部以外的部分之側部齒更大 -8- 200800735 (5) 的齒爲較理想。 藉由這樣地在側部區域的外側之端部配置比側部區域 的其他部分之側部齒更大的齒，在從保鮮膜之端部開始切 斷保鮮膜之情況時，也能夠將保鮮膜之切斷分割爲“刺穿 ”階段及“切開”階段之兩階段。在切斷最初，因爲與保 鮮膜相接觸之齒係只有配置在側部區域的外側之端部的大 齒，所以對於刺穿所需要的力量係很小即可解決。因此， φ 在將保鮮膜之切斷從保鮮膜之端部開始之情況以及從保鮮 膜之中央部開始之情況之雙方，都能容易地切斷保鮮膜。 另外，側部齒，係與第2齒相同大小或者比第2齒更小 爲較理想。因爲，由第2齒之切斷後，不必特別用力便能 藉由側部齒切開切斷保鮮膜，且以比較小的齒能夠得到良 好的使用感。 又，將第1齒、第2齒以及側部齒中的至少一個之斜邊 ，作爲朝內側凹陷之圚弧狀，即將齒之形狀作爲所謂銀杏 • 的葉之形狀爲較合適。 作爲如此形狀的話，能夠爲了確保切斷性一面將齒尖 . 角度作成銳角，一面將齒間間距擴大。藉此，不用增加在 一定的長度之齒的個數即可，且能夠抑制對於保鮮膜之刺 穿所需要的力量變大之情況。又，由於越到末端寬度越大 ，因此也能得到齒的耐久性提高之效果。 又，作爲非金屬製的切斷刀刃，可以列舉硬化纖維 (vulcAnized fiber)或樹脂浸漬紙、樹脂製的切斷刀刃，但 其中強度優異的樹脂製之切斷刀刃較爲理想。作爲所使用 -9 - (6) (6)200800735 的樹脂之例子，可以列舉聚乙烯、聚丙烯、聚苯乙烯、縮 醛樹脂、聚苯硫醚、PEEK(聚醚醚酮樹脂）、PES(聚醚礪 樹脂）等。進而，在樹脂中也是對環境較無害的生物降解 性樹脂爲較理想。所謂生物降解性樹脂，係在使用中雖然 保持與以往的樹脂相同程度之功能，但是在使用後被廢棄 時’藉由自然界中存在的微生物之作用而分解爲低分子化 合物’且最終完全分解爲二氧化碳和水之高分子材料，由 於具有這樣的功能，因此能夠提供對環境更沒影響的切斷 刀刃。作爲生物降解性樹脂之例子，可以列舉聚乳酸樹脂 、聚乙二醇酸樹脂。 本發明之切斷刀刃，係可單獨使用上述的樹脂材料中 之1種，或者使用將兩種以上混合之樹脂材料來形成。又 ，在單獨的樹脂材料或者將兩種以上混合的樹脂材料中， 也可以以相對於切斷刀刃的材料整體5〜70質量％的比例 添加碳酸錦、二氧化鈦、二氧化砂等之無機粉末來形成。 藉由添加無機粉末，能夠提高機械強度。 本發明之切斷刀刃，係可將此等之材料，在作成厚度 0 · 0 5〜0 · 5 m m，較理想爲0 · 1〜0 · 3 m m的薄片狀之後，藉 由模具之沖孔加工來形成。 本發明之切斷刀刃，係將該切斷刀刃粘接在包裝容器 上的話，可提供切斷性優異之包裝容器。 〔發明之效果〕 根據本發明之切斷刀刃以及具備該切斷刀刃之包裝容 -10- 200800735 ⑺ 器，在切斷保鮮膜時不需要較大的力量。又，在第1階段 刺穿保鮮膜，且連續地在第2階段切開保鮮膜，因此能夠 減輕作用在切斷刀刃的各個齒之負荷，且即使切斷刀刃爲 樹脂製的，也能使其耐久性提高，進而也能夠使包裝容器 本身的耐久性提高。 該效果，係降低使齒尖過度地銳利之必要性，也非常 有助於齒本身的耐久性之提高。 【實施方式】 〔發明之實施形態〕 〔第一實施形態〕 第1圖，是顯示應用本發明的包裝容器1 〇的形態之立 體圖。該包裝容器1 0，係由一張厚紙較理想爲白板紙 (clAy coAted newsbAck boArd)所製作。如第 1圖所斤：，包 裝容器1 〇係由：用以收納被滾筒狀地捲繞在圓筒狀紙管1 2 ^ 上的保鮮膜14之容器主體16;及與該容器主體16 —體地設 置之蓋體18所構成。在關上蓋時，該包裝容器10的整體形 - 狀係呈大致長方體形狀。另外，在本實施形態中，保鮮膜 . 14係由聚偏二氯乙烯構成。 容器主體16的上部，係作爲用以將保鮮膜14拉出的開 口部而開放。另外，蓋體18係從容器主體16的後面壁之頂 部邊緣20連續延伸。因此，蓋體18係能夠相對於容器主體 16而轉動，且能夠覆蓋容器主體16的開口部。 蓋體18的前面壁22之前端緣係呈V字狀，配合該形 -11- (8) 200800735 狀切斷刀刃24也使用V字狀的。在使用採用這樣的V字 狀切斷刀刃24的包裝容器10來切斷保鮮膜14時，如第1圖 所示，用一隻手把持住保鮮膜1 4的前端部，用另一隻手握 住包裝容器1 〇，同時使這隻手的拇指貼近蓋體前面壁22的 中央部，將包裝容器1 〇朝前側，即箭頭符號A的方向扭 轉。藉此，位於V字狀切斷刀刃24的中央區域之齒會貫 穿保鮮膜14，就這樣拉引保鮮膜14的話，保鮮膜14就會被 • 切開而切斷。 其次，更詳細地對本實施形態的切斷刀刃24進行說明 〇 第2圖是本發明的第一實施形態的樹脂製之切斷刀刃 的中央部之放大圖。切斷刀刃24是樹脂製的，在本實施形 態中，爲了考慮環境保護因素而特別採用生物降解性樹脂 。作爲生物降解性樹脂，作爲代表的可以列舉聚乳酸、聚 乙二醇酸等。其中，在本發明中，適於使用日本專利第 ^ 3 5 73 605號所揭示的使聚乳酸類的樹脂組成物在2個軸上延 伸的材料。更具體地說，從將聚乳酸類的樹脂組成物在2 - 個軸上延伸而成之薄片上利用沖壓加工或雷射切削法等形 . 成本發明所揭示的形狀之齒，藉此能夠得到切斷刀刃24。 另外，作爲樹脂以外的成分，除了日本專利第3 5 73 605號 所揭示的無機塡充劑以外，亦可含有熱穩定劑、光穩定劑 、防潮劑、防水劑、脫模劑、顔料、染料等。 本實施形態的切斷刀刃24，係以通過V字的頂點之 中心線（第2圖的符號CL)爲中心左右對稱，被區分爲中央 -12- 200800735 ⑼ 區域28及位於其兩側的側部區域30，共三個區域。 在側部區域3 0的齒（側部齒）3 1係一定之尺寸，使用與 以往一般所使用的齒同程度之比較小的齒。以下，將該尺 寸的齒稱爲“小齒”。200800735 (1) EMBODIMENT OF THE INVENTION [Technical Field] The present invention relates to a packaging container for packaging a wrap film wound on a cylindrical core in a roll shape, in particular, for use in a packaging container Cut the blade. [Prior Art] • Various types of packaging containers for wrap film have been known in the past. Most of them are made of thick paper, and are composed of a container main body that houses a wrap film that is wound into a roll shape, and a lid body that is integrally provided with the container main body. Then, the wrap film which is pulled out from the container is cut by a zigzag cutting blade attached to the back surface of the front wall of the lid. In order to allow the film to be easily cut, a cutting blade having a V-shaped shape in which the intermediate portion of the cutting blade is closer to the bottom side of the container than the side portion is used instead of the cutting of the linear shape. Blade. This shape is a shape for cutting the wrap film from the most protruding portion of the cutting blade, so that it is cut reliably and easily. _ Further, the cutting blade is generally made of metal. However, in recent years, in consideration of the environmental problem, a non-metallic cutting blade made of paper or resin has been studied. However, the non-metallic cutting blade is difficult to exhibit a good cutting property like a metal cutting blade, and in particular, the cutting of a film such as polyethylene, polypropylene or polyvinylidene chloride which is highly stretchable. A large amount of force is required, so that the use of the container or the tooth may be damaged, sometimes causing problems in use. In order to improve this, for example, as disclosed in the following Patent Documents 1 to 4-5-200800735 (2), it is attempted to make the teeth of the central portion of the cutting blade larger than the teeth of the side portion thereof, or conversely The teeth in the central region of the cutting blade are smaller than the teeth in the region of the side portion, or the front end of the tooth is sharpened to improve the cutting property. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. 2 547 868 [Patent Document 3] Japanese Patent Application Laid-Open No. Hei. No. Hei. OPERATION OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION Inventors of the present invention have made the cutting blade of the above-mentioned Patent Document 1 The front ends of the teeth of the serrated blade are sharp, but the sizes of the teeth are all the same, so there is a problem in the cutting property. Further, in the cutting blades of Patent Documents 2 and 3 described above, since the central portion is provided with a relatively large large tooth in comparison with the side portion, the durability and the feeling (functionality) at the time of cutting are problem. Further, in the cutting blade of the above-mentioned Patent Document 4, a switching blade is provided between the small blade disposed at the center portion and the large blade disposed at both ends, but the feeling at the time of cutting (functional) Sex) is not yet sufficient. In this case, it is required to provide a non-metallic cutting blade which has improved cutting performance. Therefore, the first object of the present invention is to provide a roll-shaped package which can easily and surely cut a wrap film or the like. Non-metallic cutting blade. Further, a second object of the present invention is to provide a packaging container comprising a cutting blade of -6-(3) 200800735. [Means for Solving the Problem] In order to achieve the above-mentioned object, it was found that the cutting property of the wrap film and the like, the size of the teeth forming the V-shaped cutting blade, the tip angle, and the interdental The spacing, the shape of the teeth, etc. are closely related and affected by them. φ The present invention has been completed based on the above-described findings, and the cutting blade of the present invention is directed to the back surface of the face wall of the lid which is attached to the drum of the drum-shaped package to be wrapped with a wrap film or the like. The V-shaped cutting blade formed of a non-metal is characterized in that: (A) a central region and a side region disposed on both sides of the central region, and (b) the central region is provided a plurality of first teeth and a plurality of second teeth smaller than the first teeth; (c) arranging one of the first teeth in a vertex of the v-shape of the central region, and The other first teeth are arranged at a predetermined interval so as to sandwich the first teeth of the apex portion; (d) the second teeth are disposed between the first teeth; (e) the central region is connected The first straight line of the tooth tip of the other first tooth and the tooth tip of the first tooth of the apex portion is located farther from the front wall of the cover than the tooth tip of the second tooth in the central region (f) The side area is provided with a plurality of side teeth; 200800735 (4) (g) parallel to the first straight line, and connecting the second straight line of the tooth tip of the second tooth to the tooth tip of the side tooth in the side region or the tooth tip of the side tooth Located further away from the front wall of the cover. By providing the central region of the above-described structure, the cutting of the wrap film or the like as a medium is divided into the first "piercing" phase of the cutting by the central region; and the subsequent "side region" Cut the two phases of the "stage". Further, the "piercing" stage is divided into two steps of a piercing step by the first tooth and a piercing step by the second tooth. At the beginning of the cutting, since the tooth system that is in contact with the wrap film has only the first tooth, the force required for piercing is small and can be solved. In addition, when only the first tooth is used, the force of the valley portion between the first teeth requires strength for piercing of the wrap film, but the second tooth penetrates the wrap film after the first tooth is pierced, and the puncture can be smoothly punctured. Wear plastic wrap. Further, it is preferable that the side regions are provided with side ♦ teeth having two sizes that are alternately arranged. By alternately arranging the side teeth of the two sizes on the side regions in this manner, it is possible to simultaneously contact the wrap film during the transition from the "piercing" stage to the "cutting" stage and the "cutting" stage. The number of side teeth is reduced. Therefore, compared with the case where a plurality of side teeth having a single size are provided, the transition from the 'punch-through' stage to the "cut-off" stage can be smoothed, and the plastic wrap can be cut with less force. Further, the cutting blade of the present invention is provided at the outer end portion of the side portion, and includes a tooth larger than the side portion of the portion other than the outer end portion of the side portion -8 - 200800735 (5) It is preferable that the teeth on the outer side of the side portion are disposed at the outer end portion of the side portion as described above, and when the plastic wrap is cut from the end portion of the wrap film, The cutting of the wrap film can be divided into two stages of the "piercing" stage and the "cutting" stage. At the beginning of the cutting, since the tooth system in contact with the wrap film is only disposed at the outer end of the side portion. Tooth, so the force required for piercing can be solved very small. Therefore, φ is both the case where the cutting of the wrap film is started from the end of the wrap film and the case where the film is started from the center of the cling film. The plastic wrap can be easily cut off. The side teeth are preferably the same size as the second teeth or smaller than the second teeth. Therefore, since the second teeth are cut, the plastic wrap can be cut by the side teeth without special force, and A relatively small tooth can provide a good feeling of use. Further, the oblique side of at least one of the first tooth, the second tooth, and the side tooth is curved inwardly, that is, the shape of the tooth is called a so-called ginkgo. The shape of the leaf is suitable. When the shape is such a shape, the distance between the teeth can be increased by making the angle of the tooth tip at an acute angle, thereby increasing the number of teeth at a certain length. In addition, it is possible to suppress the increase in the force required for piercing of the wrap film, and the effect of improving the durability of the teeth can be obtained as the width of the end is increased. The cutting blade may be a vulcanized fiber or a resin impregnated paper or a resin-made cutting blade, but a resin-made cutting blade having excellent strength is preferable. -9 - (6) (6) is used. )200800 Examples of the resin of 735 include polyethylene, polypropylene, polystyrene, acetal resin, polyphenylene sulfide, PEEK (polyether ether ketone resin), PES (polyether oxime resin), etc. Further, in the resin It is also a biodegradable resin which is not harmful to the environment. The biodegradable resin is a function of the same degree as the conventional resin in use, but it is discarded when it is used. A polymer material which is decomposed into a low molecular compound and functions as a carbon dioxide and water, and which has such a function, can provide a cutting blade which has no influence on the environment. As an example of a biodegradable resin, The dicing blade of the present invention may be formed by using one of the above-mentioned resin materials alone or a resin material in which two or more types are mixed. Further, in a single resin material or a resin material in which two or more kinds are mixed, an inorganic powder such as bromine, titanium dioxide or silica sand may be added in a ratio of 5 to 70% by mass based on the entire material of the cutting blade. form. Mechanical strength can be improved by adding an inorganic powder. In the cutting blade of the present invention, the material can be punched by a mold after forming a sheet having a thickness of 0·0 5 to 0 · 5 mm, preferably 0·1 to 0 · 3 mm. Processing to form. In the cutting blade of the present invention, when the cutting blade is adhered to a packaging container, a packaging container excellent in cutting property can be provided. [Effects of the Invention] According to the cutting blade of the present invention and the packaging capacity of the cutting blade -10- 200800735 (7), a large force is not required when cutting the wrap film. Further, since the wrap film is pierced in the first stage and the wrap film is continuously cut in the second stage, the load acting on each of the teeth of the cutting blade can be reduced, and even if the cutting blade is made of resin, it can be made The durability is improved, and the durability of the packaging container itself can be improved. This effect reduces the necessity of making the tip of the tooth excessively sharp, and also contributes to the improvement of the durability of the tooth itself. [Embodiment] [Embodiment of the Invention] [First Embodiment] Fig. 1 is a perspective view showing a form of a packaging container 1 to which the present invention is applied. The packaging container 10 is made of a piece of thick paper, preferably white paper (clAy coAted newsbAck boArd). As shown in Fig. 1, the packaging container 1 is: a container main body 16 for accommodating the wrap film 14 wound on the cylindrical paper tube 1 2 ^ in a roll shape; and the container main body 16 The cover body 18 is provided. When the lid is closed, the overall shape of the packaging container 10 has a substantially rectangular parallelepiped shape. Further, in the present embodiment, the wrap film 14 is made of polyvinylidene chloride. The upper portion of the container body 16 is opened as an opening for pulling out the wrap film 14. Additionally, the cover 18 extends continuously from the top edge 20 of the rear wall of the container body 16. Therefore, the lid body 18 is rotatable relative to the container body 16, and can cover the opening of the container body 16. The front end edge of the front wall 22 of the lid body 18 has a V-shape, and the shape of the cutting blade 24 is also V-shaped in conjunction with the shape -11-(8) 200800735. When the wrap film 14 is cut by using the packaging container 10 having such a V-shaped cutting blade 24, as shown in Fig. 1, the front end portion of the wrap film 14 is held by one hand, and the other hand is used. Holding the packaging container 1 while bringing the thumb of the hand close to the central portion of the front wall 22 of the cover body, the packaging container 1 is twisted toward the front side, that is, in the direction of the arrow symbol A. Thereby, the teeth located in the central portion of the V-shaped cutting blade 24 pass through the wrap film 14, and when the wrap film 14 is pulled, the wrap film 14 is cut and cut. Next, the cutting blade 24 of the present embodiment will be described in more detail. FIG. 2 is an enlarged view of a central portion of a resin cutting blade according to the first embodiment of the present invention. The cutting blade 24 is made of a resin. In the present embodiment, a biodegradable resin is particularly used in consideration of environmental protection factors. As the biodegradable resin, polylactic acid, polyethylene glycol acid, and the like are exemplified. Among them, in the present invention, a material in which a polylactic acid resin composition is stretched on two axes as disclosed in Japanese Patent No. 3,735,605 is suitable. More specifically, a sheet obtained by stretching a polylactic acid resin composition on two axial axes is formed by a press working or a laser cutting method, and the teeth of the shape disclosed in the invention can be obtained. The blade 24 is cut. In addition, as a component other than the resin, in addition to the inorganic chelating agent disclosed in Japanese Patent No. 3 5 73 605, a heat stabilizer, a light stabilizer, a moisture-proof agent, a water repellent, a mold release agent, a pigment, and a dye may be contained. Wait. The cutting blade 24 of the present embodiment is symmetrical with respect to the center line of the vertex of the V-shape (symbol CL of the second drawing), and is divided into a center -12-200800735 (9) region 28 and sides on both sides thereof. Part area 30, a total of three areas. The teeth (side teeth) 31 of the side portion 30 are of a constant size, and teeth having a small degree of similarity to the conventionally used teeth are used. Hereinafter, the teeth of this size are referred to as "small teeth".
本實施形態的中央區域2 8，係如第2圖所明示，由1 5 個齒3 5、3 6、3 8所構成。中央區域中的齒有3種：與側部 區域3 0的側部齒3 1相同尺寸之小齒3 5、比小齒3 5大的齒（ 第2齒：以下稱爲“中齒”）36、以及比中齒36更大的齒（第1 齒：以下稱爲“大齒”）38。另外，在以下的說明中，在中 齒以及大齒的參照符號3 6、3 8上，適當地附加字母。 大齒38中的1個，係位於切斷刀刃24的V字之頂點部（ 中央區域28的長邊方向中心），其他的大齒38b、38c，係 以中央的大齒3 8 A爲中心，以一定的間隔左右各配置2個 。中央的第1個大齒38A之齒尖與位於左右各側的第2個和 第3個大齒38b、38c之齒尖，係能夠以直線連接，且左右 各側之該直線（第1直線）L1，係位於比處於中央區域28之 左右各側的中齒36之齒尖更前側（遠離蓋體前面壁22的前 端緣之側）之位置。 另外，中央區域2 8中的中齒3 6，係在左右各側各配置 4個，合計8個。中央側的4個中齒36A、36b係以一定的間 隔配置在大齒3 8 A、3 8 b、3 8 c之間，其他的4個中齒3 6 c、 36d係以同樣的間隔配置在第3個大齒38c之外側。左右各 側的中齒36A、36b、36c以及36d之齒尖係能夠以直線（第 2直線）L2連接，左右各側之該直線L2，係與上述直線L1 -13- 200800735 (10) 實質地平行，並且位於比上述直線L 1更後側（靠近蓋體前 面壁22的前端緣之側）之位置。 另外，連接左右各側之側部區域3 0中的側部齒3 1的齒 尖之直線（第3直線）L3，係與同一側的直線L1及直線L2實 質地平行，且位於比該直線L1及直線L2更後側（靠近蓋體 前面壁22的前端緣之側）之位置。即，左右各側之直線L2 ，係在直線L1及L3之中間延伸。 φ 更且，中央區域2 8之小齒3 5，係在左右各側中，配置 在第3個與第4個中齒36c、36d之間，其齒尖係位於連接 側部區域3 0的側部齒3 1之齒尖的直線L 3之延長線上。 在本實施形態的切斷刀刃24之中，小齒35、中齒36、 大齒38、側部齒31的各自之齒尖角度α(第2圖），係作爲適 於刺入保鮮膜1 4之角度。在保鮮膜1 4由聚偏二氯乙烯構成 的本實施形態中，齒尖角度α係3 0 °〜9 0 °之範圍爲較理 想，更理想爲40°〜70°之範圍。這是因爲，如果大於90 ^ ° ，則爲了刺入保鮮膜1 4需要很大的力量；而如果小於3 0 。，則會損傷齒3 1〜3 8本身之耐久性。 . 另外，小齒3 5、中齒3 6、大齒3 8、側部齒3 1的各自之 . 形狀，係亦可爲單純的等腰三角形，但在本實施形態中， 作爲斜邊形成朝內側凹陷之圓弧狀的扇形展開之形狀或者 銀杏葉之形狀較爲適合。這是爲了將齒尖角度α，保持爲 上述之銳角並使耐久性提高。另外，在作爲如此形狀時， 在相同長度範圍內，可以使齒的個數比作爲等腰三角形時 少，且有助於減輕切斷所需要的力量，這一點在後面進行 -14- (11) 200800735 敍述。 其次，對於使用具有本實施形態的切斷刀刃24之包裝 容器10來切斷保鮮膜14之情況進行說明。 首先，如第1圖所示，用一隻手握住包裝容器10，用 另一隻手把持住保鮮膜1 4之前端部，且拉出所需要的量。 然後，將握住包裝容器10的手之拇指貼近蓋體前面壁22之 中央部，並將包裝容器1 〇朝前側，即箭頭符號A之方向 _ 扭轉。 此時，首先位於切斷刀刃24的頂點部之第1個大齒 3 8A會與保鮮膜14接觸，並將其刺穿。又，大致同時，第 2個大齒38b，進而第3個大齒38c會與保鮮膜14接觸，並 將其刺穿。如此地，由於最初與保鮮膜1 4接觸的，僅僅是 齒間間距較大的最大5個大齒3 8，因此在切斷當初，扭轉 包裝容器10之力量係以很小即可解決。即，由於各大齒38 爲了刺穿保鮮膜1 4所必需的最小限度之力量爲一定’因此 ® 僅爲該力量的5倍之力量成爲扭轉包裝容器1〇之最小的力 量。如以往，將齒尖角度變小，並將齒間間距變小的切斷 . 刀刃中，因與保鮮膜14接觸的齒之個數較多’故施加在包 . 裝容器10上的力量必然較大，使用之感覺也會損傷，但在 本實施形態中並沒有這樣的問題。 接著，中齒36會與保鮮膜14接觸，且藉由這些中齒36 貫穿保鮮膜1 4。在這裏，如果假定沒有中齒3 6的話，由於 大齒38之間的間距較大，因此齒38之間的谷部變爲阻力’ 而對於保鮮膜1 4之切開需要較大的力量。然而’在本實施 •15- (12) 200800735 形態中，由於緊接著由大齒3 8之保鮮膜1 4的刺穿’中齒3 6 則貫穿大齒3 8之間的保鮮膜1 4 ’因此能夠順利地刺穿保鮮 膜14。另外，同時與保鮮膜14接觸的中齒36之數目最大爲 8個，但實際上同時與保鮮膜1 4接觸的中齒3 6之數目係少 於8個，又由於藉由大齒38刺穿保鮮膜14而使得周邊部脆 弱化，因此由中齒3 6進行刺穿所需要的力量係比由大齒3 8 刺穿時更小。如此地，從由大齒3 8進行的第1階段之切斷 φ 到由中齒36進行的第2階段之切斷，都不會帶給使用者排 斥感而能順利地進行。 更且，將包裝容器10朝箭頭符號A方向扭轉時’中 央區域28的小齒35就會刺穿第3個和第4個之中齒36c、36d 間的保鮮膜14，且保鮮膜14之切開會往側部區域30前進。 只要在保鮮膜1 4上形成充分的大小之初期刺穿部，以後對 於切斷保鮮膜14就不需要特別大的力量，在由側部齒31構 成的側部區域3 0也能順利地切開而切斷保鮮膜1 4。 ® 若使用本實施形態之切斷刀刃24的話，在切斷保鮮膜 1 4時，不需要特別大的力量，這減少了將各齒3 1、3 5、3 6 . 、3 8的齒尖角度α過度地變小之必要性，進而亦可使各齒 . 3 1、3 5、3 6、3 8的耐久性提高。 另外，在將大齒38以及中齒36的齒高（突出量）過度地 變大時，切斷刀刃24的距固定部之距離，即距蓋體前面壁 22的前端緣之距離則會變長，可能會損及其耐久性。又， 如果齒高大的話，也可能會弄傷使用包裝容器1 0的人之手 。因此，從切斷性、耐久性以及安全性的方面可以這樣設 -16 - (13) 200800735 置：例如，中央區域28的大齒38之齒高HI，係設爲1.0〜 4.0 mm較爲理想，更理想設爲1.2〜3 · 5 mm，進一步更理 想設爲1.5〜3.0 mm;而中齒36之齒高H2’係設爲1·〇〜 3.0 mm較爲理想，更理想設爲1·2〜2.5 mm ;而小齒35之 齒高Η 3，係設爲0 · 5〜2 · 5 m m較爲理想’更理想設爲0 ·6 〜2 · 0 mm。 另外，中央區域28之齒間間距係可以這樣設置：大齒 φ 38之間設爲3.0〜9.0 mm較爲理想，更理想設爲4.〇〜7·0 mm，進一步更理想設爲4.5〜6·0 mm ;而中齒36之間也是 設爲3 · 0〜9 · 0 mm較爲理想，更理想設爲4 · 0〜7.0 mm，進 一步更理想設爲4 · 5〜6.0 m m。這是因爲，在齒間間距超 過9.0 mm時，在保鮮膜14的第1階段之刺穿中，保鮮膜14 會卡在大齒38之間的谷部上從而對切斷產生障礙；在齒間 間距比3.0 mm還窄時，設置在中央區域28的齒之個數會 增加，其結果對於刺穿所需要的力量會變大，而無法達到 • 本發明之目的。 側部區域3 0的側部齒3 1之齒高Η 3，係可設爲0.3〜 . 2.5 mm較爲理想，更理想設爲0.5〜2·0 mm程度。又，側 部齒31之齒間間距，係可設爲1.0〜3.2 mm較爲理想，更 理想設爲1 ·2〜2·5 mm。 〔第二實施形態〕 第3圖，係本發明的第二實施形態的樹脂製之切斷刀 刃的中央部之放大圖。第二實施形態之切斷刀刃24，係在 -17- (14) 200800735 中央區域28具有與第一實施形態的切斷刀刃24之中央區域 28同樣的齒之結構。但是，第二實施形態的切斷刀刃24, 係在側部區域具備大小不同的2種側部齒’這一點與第 一實施形態的切斷刀刃24不同。 第4圖，係本發明的第二實施形態的樹脂製之切斷刀 刃之單側的側部區域之一部分放大圖。第4圖的切斷刀刃 24，係於側部區域3 0具備有：與小齒3 5相同尺寸之複數個 φ 側部齒（以下稱爲“側部第1齒”）3 1 ;以及使夾在側部第1齒 31地比側部第1齒31較小的側部齒（以下稱爲“側部第2齒 ”）3 2。在側部區域3 0上，以與屬於中央區域2 8的中刃3 6 d 接鄰之方式配置側部第1齒3 1，且在切斷刀刃24的長邊方 向上以一定的間隔交互地配置側部第2齒3 2及側部第1齒31 。另外，在第4圖中，雖爲了方便僅顯示出5個側部齒’但 實際上係將側部第1齒31及側部第2齒32交互地設置到切斷 刀刃24之端頭。又，在第4圖中，雖僅顯示出切斷刀刃24 • 的其中一方之側部區域，但該切斷刀刃24係在另一方之側 部區域也對稱地具備有同樣的齒之結構。 . 配置在側部區域3 0的複數個側部第1齒3 1之齒尖與中 央區域2 8的小齒3 5之齒尖，係能夠以直線連接，而該直線 (第3直線）L3，係與連接大齒的齒尖之直線L1及連接中齒 的齒尖之直線L2實質地平行，並且位於比直線L1及直線 L2更後側（靠近蓋體前面壁22的前端緣之側）之位置。 又，複數個側部第2齒32之齒尖係能夠以直線連接’ 而該直線（第4直線）L4，係與上述直線LI、L2以及L3實質 -18- (15) 200800735 地平行，並且位於比上述直線LI、L2以及L3更後側（靠近 蓋體前面壁22的前端緣之側）之位置。 在本實施形態的切斷刀刃24中，小齒3 5、中齒3 6、大 齒38、側部第1齒31、側部第2齒32之各自的齒尖角度α( 第3圖），係被設爲適於刺穿保鮮膜1 4之角度。在保鮮膜1 4 由聚偏二氯乙烯所構成的本實施形態中，齒尖角度α係3 〇 。〜90°之範圍較爲理想，更理想爲40°〜70°之範圍。 # 這是因爲，如果大於90° ，則爲了剌穿保鮮膜14需要很大 . . ' 的力量；如果小於3 0 ° ，則會損及齒3 1〜3 8本身之耐久性 〇 又，小齒3 5、中齒36、大齒38、側部第1齒31、側部 第2齒32之各自的形狀，係亦可爲單純的等腰三角形，但 在本實施形態中，作爲斜邊形成朝內側凹陷之圓弧狀的扇 形展開之形狀或者銀杏葉之形狀較爲適合。這是爲了將齒 尖角度α，保持爲上述之銳角並使耐久性提高。另外，在 ® 作爲如此形狀時，在相同長度範圍內，可以使齒的個數比 作爲等腰三角形時少，且有助於減輕切斷所需要的力量。 其次，對於使用具有本實施形態的切斷刀刃2 4之包裝 容器10來切斷保鮮膜14之情況進行說明。 與上述之第一實施形態同樣地，首先，如第1圖所示 ，用一隻手握住包裝容器1 〇，用另一隻手把持住保鮮膜1 4 之前端部，且拉出所需要的量。然後，將握住包裝容器10 的手之拇指貼近蓋體前面壁22之中央部，並將包裝容器10 朝前側，即箭頭符號Α之方向扭轉。本實施形態之切斷 -19- (16) 200800735 刀刃24，係在中央區域2 8具有與上述的第一實施形態的切 斷刀刃之中央區域同樣的齒之結構。因此，與第一實施形 態同樣地，在保鮮膜14上容易形成充分大小的初期刺穿部 〇 本實施形態的切斷刀刃24，係在側部區域具有如第4 圖所示的齒之結構？因此，以切斷刀刃2 4的中央區域2 8進 行保鮮膜14的“刺穿”之後，配置在靠近中央區域28的數個 φ 側部第1齒3 1會與保鮮膜1 4接觸，且開始進行“切開”。在 由側部第1齒3 1進行的“切開”進行到某種程度後，保鮮膜 14係會與被配置在靠近中央區域28的數個側部第2齒32接 觸，而保鮮膜14係被切開而切斷。 若使用如第4圖所示的，在側部區域具備有尺寸相互 不同的大小兩種側部齒（側部第1齒31以及側部第2齒3 2)的 本實施形態之切斷刀刃24的話，在從“刺穿”階段往“切開” 階段之轉移時以及“切開”階段之進行時，因爲同時與保鮮 • 膜1 4接觸的側部齒之個數變少，所以能夠使對於從刺穿階 段往切開階段之轉移時所需要的力量、以及對於切開階段 „ 之進行所需要的力量變得更小。 若使用本實施形態之切斷刀刃24的話，在切斷保鮮膜 14時，不需要特別大的力量，減少了將各齒31、32、35、 3 6、3 8的齒尖角度α過度地變小之必要性，進而亦可使各 齒31、32、35、36、38的耐久性提高。 另外，將大齒38以及中齒3 6的齒高（突出量）過度地變 大時，切斷刀刃24的距固定部之距離，即距蓋體前面壁22 -20- (17) 200800735 的前端緣之距離則變長，可能會損及其耐久性。又’如果 齒高大的話，也可能會弄傷使用包裝容器10的人之手。因 此，從切斷性、耐久性以及安全性的方面可以這樣設置： 例如，中央區域28的大齒38之齒高Η 1，係設爲〜4·0 mm較爲理想，更理想設爲1.2〜3.5 mm，進一步更理想設 爲1.5〜3.0 mm;而中齒36之齒高H2，係設爲1·〇〜3·0 mm較爲理想，更理想設爲1.2〜2.5 mm ;而小齒35之齒高 φ Η 3，係設爲0.5〜2 · 5 mm較爲理想，更理想設爲0 · 6〜2 · 0 mm ° 中央區域2 8之齒間間距係可以這樣設置：大齒3 8之間 設爲3.0〜9.0 mm較爲理想，更理想設爲4.0〜7.0 mm，進 一步更理想設爲4.5〜6.0 mm ;而中齒36之間也是設爲3·〇 〜9.0 mm較爲理想，更理想設爲4.0〜7.0 mm，進一步更 理想設爲4.5〜6.0 mm。這是因爲，在齒間間距超過9 . 〇 mm時，在保鮮膜14的第1階段之刺穿中’保鮮膜14會卡 # 在大齒3 8之間的谷部上從而對切斷產生障礙；在齒間間距 比3.0 mm還窄時，設置在中央區域28的齒之個數會增加 ，其結果對於刺穿所需要的力量會變大’而無法達到本發 明之目的。 側部區域3 0的側部第1齒3 1之齒高Η 3 ’係可設爲〇 · 3 〜2.5 mm較爲理想，更理想設爲〇 . 5〜2.0 mm。又，側部 第2齒32之齒高H4，係可設爲〇·3〜1·5 mm較爲理想’更 理想設爲〇. 5〜1 · 2 mm。又，側部第1齒3 1以及側部第2齒 3 2之齒間間距，係可設爲1·〇〜3.5 mm較爲理想，更理想 -21 - (18) 200800735 設爲1.2〜3.0 mm。藉由切斷刀刃24在側部區域30具備有 這樣的齒之結構，可更加順利地進行保鮮膜之切開。 〔第三實施形態〕 第5圖，係本發明的第三實施形態的樹脂製之切斷刀 刃之單側的側部區域之一部分放大圖。第5圖之切斷刀刃 24，雖未圖示，但在中央區域28具有與第一以及第二竇施 # 形態的切斷刀刃24之中央區域28同樣的齒之結構。但是， 第5圖之切斷刀刃24，係在側部區域3 0具備有：比小齒3 5 小的側部齒（以下稱爲“側部第3齒”）33 ;及使被側部第3齒 3 3夾著地比小齒3 5大而比中齒3 6小的複數個側部齒（以下 稱爲“側部第4齒”）34，這一點與第一以及第二實施形態之 切斷刀刃24不同。在側部區域30上，以與屬於中央區域28 的中刃36d接鄰之方式配置側部第3齒33，且在切斷刀刃 24的長邊方向上交互地配置側部第3齒33以及側部第4齒34 ^ 。另外，在第5圖中，爲了方便僅顯示出4個側部齒，但實 際上係將側部第3齒33以及側部第4齒3 4交互地設置到切斷 - 刀刃24之端頭。又，在第5圖中，雖僅顯示出切斷刀刃24 - 之其中一方的側部區域，但該切斷刀刃24係在另一方的側 部區域也對稱地具有同樣的齒之結構。 配置在側部區域3 0的複數個側部第4齒3 4之齒尖，係 能夠以直線連接，而該直線（第5直線）L5，係與連接大齒 的齒尖之直線L1以及連接中齒的齒尖之直線L2實質地平 行，並且位於比上述直線L 1以及直線1^2更後側（靠近蓋體 -22- (19) 200800735 前面壁22的前端緣之側）之位置。 又，複數個側部第3齒3 3之齒尖，係能夠以直線連接 ，而該直線（第6直線）L6，係與上述直線LI、L2以及L5實 質地平行，並且位於比上述直線LI、L2以及L5更後側（靠 近蓋體前面壁22的前端緣之側）之位置。另外，中央區域 的小齒35之齒尖係位於上述直線L5與直線L6之間。 在本實施形態之切斷刀刃24中，小齒35、中齒36、大 φ 齒3 8、側部第3齒3 3、側部第4齒3 4之各自的齒尖角度α( 第5圖），係被設爲適於刺穿保鮮膜1 4之角度。在保鮮膜1 4 由聚偏二氯乙烯構成之本實施形態中，齒尖角度α係30° 〜90°之範圍較爲理想，更理想爲40°〜70°之範圍。這 是因爲，如果大於90°時，則爲了刺穿保鮮膜14需要很大 的力量；如果小於3 0 °時，則會損及齒3 3〜3 8本身之耐久 性。 又，小齒3 5、中齒3 6、大齒3 8、側部第3齒3 3及側部 ® 第4齒34之各自的形狀，係亦可爲單純的等腰三角形，但 在本實施形態中，作爲斜邊形成朝內側凹陷之圓弧狀的扇 . 形展開之形狀或者銀杏葉之形狀較爲適合。這是爲了將齒 . 尖角度α，保持爲上述之銳角並使耐久性提高。另外’在 作爲如此形狀時，在相同長度範圍內，可以使齒的個數比 作爲等腰三角形時少，且有助於減輕切斷所需要的力量。 其次，對於使用具有本實施形態的切斷刀刃24之包裝 容器10來切斷保鮮膜14之情況進行說明。 與上述之第一實施形態同樣地，首先，如第1圖所示 -23- (20) 200800735 ，用一隻手握住包裝容器10，用另一隻手把持住保鮮膜14 之前端部，且拉出所需要的量。然後，將握住包裝容器1 0 的手之拇指貼近蓋體前面壁2 2之中央部，並將包裝容器1 0 朝前側，即箭頭符號A之方向扭轉。本實施形態之切斷 刀刃24，係在中央區域28具有與上述的第一實施形態的切 斷刀刃之中央區域同樣的齒之結構。因此，與第一實施形 態同樣地，在保鮮膜1 4上容易形成充分大小的初期刺穿部 •。 本實施形態的切斷刀刃24，係在側部區域具有如第5 圖的齒之結構。因此，以切斷刀刃24的中央區域28進行保 鮮膜14的“刺穿”，接著配置在靠近中央區域28的數個側部 第4齒34會與保鮮膜14接觸，且轉移至“切開”。在由側部 第4齒34進行的“切開”進行到某種程度後，保鮮膜14係會 與被配置在靠近中央區域2 8的數個側部第3齒3 3接觸，而 保鮮膜14係被切開而切斷。 ® 如第5圖所示，若使用具備有比小齒3 5較爲大的側部 第4齒34之切斷刀刃24的話，則能夠更順利地進行從“刺穿 ”階段往“切開”階段之轉移。又，由於在側部區域30具備 有尺寸相互不同的大小兩種側部齒（側部第3齒33以及側部 第4齒3 4)，因此在“切開”階段，同時與保鮮膜14接觸的側 部齒之個數變少，能夠使對於“切開”的進行所需要的力量 變得更小。 若使用上述的本實施形態之切斷刀刃24的話，在切斷 保鮮膜14時，不需要特別大的力量，這減少了將各齒33、 -24- (21) (21)200800735 3 4、3 5、3 6、3 8的齒尖角度α過度地變小之必要性，進而 亦可使各齒3 3、3 4、3 5、3 6、3 8的耐久性提高。 另外，將大齒38以及中齒36的齒高（突出量）過度地變 大時，切斷刀刃24的距固定部之距離，即距蓋體前面壁22 的前端緣之距離則變長，可能會損及其耐久性。又，如果 齒高大的話，也可能會弄傷使用包裝容器10的人之手。因 此，從切斷性、耐久性以及安全性的方面可以這樣設置： 例如，中央區域28的大齒38之齒高Η 1，係設爲1·〇〜4.0 mm較爲理想，更理想設爲1.2〜3.5 mm，進一步更理想設 爲1.5〜3.0 mm;而中齒36之齒高H2，係設爲1.0〜3.0 mm較爲理想，更理想設爲1.2〜2.5 mm ;而小齒35之齒高 Η 3，係設爲0 · 5〜2.5 mm較爲理想，更理想設爲〇 . 6〜2.0 mm ° 中央區域2 8之齒間間距係可以這樣設置：大齒3 8之間 設爲3.0〜9.0 mm較爲理想，更理想設爲4.0〜7.0 mm，進 一步更理想設爲4·5〜6.0 mm ;而中齒36之間也是設爲3.0 〜9.0 mm較爲理想，更理想設爲4.0〜7.0 mm，進一步更 理想設爲4.5〜6.0 mm。這是因爲，在齒間間距超過9.0 mm時，在保鮮膜14的第1階段之刺穿中，保鮮膜14會卡 在大齒3 8之間的谷部上從而對切斷產生障礙；在齒間間距 比3.0 mm還窄時，設置在中央區域28的齒之個數會增加 ，其結果對於刺穿所需要的力量會變大，而無法達到本發 明之目的。 側部區域30的側部第3齒33之齒高Η 6，係可設爲0.3 -25- (22) 200800735 〜1 ·5 mm較爲理想，更理想設爲〇·5〜1 ·2 mm程度。又， 側部第4齒3 4之齒高Η 5，係可設爲〇 · 5〜2 · 0 mm較爲理想 ，更理想設爲1.7〜1.8 mm程度。又，側部第3齒33以及側 部第4齒3 4之齒間間距，係可設爲1 . 〇〜3 · 0 mm較爲理想， 更理想設爲1.5〜2.5 mm。藉由切斷刀刃24在側部區域30 具備有這樣的齒之結構，可更加順利地進行保鮮膜之切開 〔第一、第二、第三實施形態的變形例〕 第6圖，係第一、第二或第三實施形態的變形例之切 斷刀刃的單側之側部區域的端部之一部分放大圖。第6圖 的切斷刀刃24，係在側部區域30的外側之的端部，即切斷 刀刃24的兩端部上，具備有比在側部區域30的外側之端部 以外的部分之側部齒更大的齒3 9。 在側部區域30的外側之端部上，於切斷刀刃24的長度 ® 方向上以一定的間隔交互地配置有齒39與側部齒（側部第1 齒3 1)。齒39的齒尖，係能夠以直線連接，且該直線L7係 _ 與連結配置在側部區域3 0的其他部分之側部齒的齒尖之直 • 線（例如，直線L3以及L4)實質地平行，並且位於比這些 直線更前側（遠離蓋體前面壁22的前端緣之側）之位置。在 第6圖中，雖僅顯示出切斷刀刃24的其中一方之側部區域 ，但該切斷刀刃24係在另一方之側部區域也對稱地具有同 樣的齒之結構。本實施形態之切斷刀刃24，係在各側部區 域3 0分別具備2個齒3 9。 -26- (23) 200800735 如果是具備有如此結構之切斷刀刃24，即使是從端部 切斷保鮮膜之情況時，也能藉由配置在側部區域30的外側 之端部上的齒39，來進行保鮮膜14之“刺穿”。之後，配置 在靠近側部區域30的端部之數個側部齒會與保鮮膜14接觸 ，而進行“切開”。藉此，保鮮膜1 4係順利地被切開切斷。 另外，配置在側部區域30的外側之端部上的齒39之齒 高Η 7，從切斷性、耐久性以及安全性的方面可以這樣設 φ 置：例如，設爲1.0〜4.0 mm較爲理想，更理想設爲1.2〜 2.5 mm程度。又，配置在側部區域3 0的外側之端部上的 齒3 9之齒間間距，係例如設爲3.0〜9 · 0 mm，較理想設爲 4.0〜7.0 mm，更理想設爲4.5〜6.5 mm。藉由使切斷刀刃 24在側部區域30的外側之端部具有這樣的齒之結構，即使 在從保鮮膜的端部開始保鮮膜的切斷之情況，也能夠順利 地進行保鮮膜的切斷。另外，備置於切斷刀刃24上的齒3 9 之個數，係以2〜1 0個程度爲較理想。 • 以上，對本發明之適合的實施形態進行了詳細說明， 但當然本發明並不限定於上述實施形態。 , 例如，第7圖，係本發明之其他的實施形態的樹脂製 之切斷刀刃的中央部之放大圖。在第7圖的切斷刀刃之側 部區域3 0，於長度方向上交互地設置有大小不同的大小兩 種之側部齒31、37。接著，連結中央區域28之中齒36的齒 尖之直線L2，係通過側部區域3 0的側部齒3 7之齒尖。又 ，連結中央區域28之小齒35的齒尖與側部區域30之側部齒 31的齒尖之直線L3，係與連結中央區域28之大齒38的齒 -27· (24) 200800735 尖之直線L 1以及上述直線L2實質地平行，並且位於比上 述直線L1以及直線L2更後側（靠近蓋體前面壁22的前端緣 之側）之位置。在使用該第7圖所示的切斷刀刃2 4之情況時 ，也與上述之第一、第二及第三之實施形態同樣地，保鮮 膜係在其中央部以較小的力量形成初期刺穿部之後，順利 地被切開而容易地被切斷。 另外，在上述的各實施形態中，保鮮膜係由聚偏二氯 # 乙烯所構成，但由其他的樹脂所構成的保鮮膜，也能應用 本發明。此種情況，齒高、齒間間距、齒尖角度等係可從 上述尺寸作適當變更。 又，構成中央區域的齒之個數，係亦可比上述的各實 施形態較多或較少，但必要條件是使保鮮膜以2階段以上 與齒相接觸來構成。 更且，滾筒狀被包裝物係不僅是保鮮膜，也可以是鋁 箔或紙。 ^ 又，切斷刀刃，係在上述的各實施形態中生物降解性 樹脂較爲理想，但也可以是其他的樹脂，又樹脂以外的非 ^ 金屬’例如硬化纖維（vulcAnized fiber)或樹脂浸漬紙等之 . 物亦可適用於本發明。 〔實施例〕 其次’對於根據本發明而試作的切斷刀刃，將保鮮膜 的切斷性評價如下。另外’請注意，是在試作、仔細硏究 、評價下述的比較例1〜8所示的切斷刀刃之後，創造出本 -28- 200800735 (25) 發明的。 <切斷性試驗1> 在該試驗中，準備了 9種使中央區域的齒之結構、齒 高、齒間間距、齒的形狀以及齒尖角度之不同的生物降解 性樹脂製薄片（三井化學株式會社製産品名：b〆シ7 LACEA TOF-250厚度0.25 mm)製之切斷刀刃。各切斷刀刃 的中央區域的齒之結構係如表1所示。另外，在各切斷刀 刃的側部區域上，具備有如第2圖所示之以往的小齒。各 切斷刀刃，係被粘接在由株式會社吳羽製造、販 賣的註冊商標“N E W夕b 7 7 7° ”所使用的包裝容器（長 度約31 cm、寬度4.5 cm、高度4.5 cm的白板紙製之容器） 上。然後，將收納在該包裝容器內的聚偏二氯乙烯之保鮮 膜實際地切斷。 切斷力，係使用如第8圖所示的測定機測定。第8圖’ 係顯示夕b 7 7 7° (上述註冊商標）切斷力測定機以及測定 方法之槪略圖（縱剖面圖）。下面對該測定方法進行說明。 首先，將包裝容器10設置在測定器之紙板盒（cArton)設置 台上，且將從包裝容器10拉出的保鮮膜14固定在具備有推 拉力計40的測定器之固定治具42上（第8圖（A))。其次，一 邊將蓋體18使不會從包裝容器10離開之方式固定，一邊使 包裝容器1 〇朝箭頭符號B之方向以每秒90°的旋轉速度、 且以保鮮膜的紙管12之軸心P爲中心旋轉（第8圖（b))。藉 此保鮮膜14係被切斷刀刃24所按壓。藉由推拉力計40測定 -29- (26) 200800735 對於由切斷刀刃24切斷保鮮膜14所需要的旋轉力。將切斷 保鮮膜1 4時的旋轉力之最大値作爲切斷力來測定。將測定 的切斷力顯示在表1中。 (實施例1) ' 使用具有第2圖所示的切斷刀刃之包裝容器進行測定 。切斷力爲3 3 0g，顯示出在測定的生物降解性樹脂製切斷 刀刃之中最優異的切斷性。 (比較例1) 第9圖，係在中央區域設置5個大齒之切斷刀刃的中央 區域之放大圖。使用具備該切斷刀刃之包裝容器進行切斷 力測定。切斷最初的保鮮膜之刺穿工序爲1階段，由大齒 之刺穿時的間距比實施例1較爲小，所以需要比實施例1更 大的切斷力。 (比較例2) 第1 〇圖，係在中央區域設置7個大齒之切斷刀刃的中 央區域之放大圖。使用具備該切斷刀刃之包裝容器進行切 斷力測定。與比較例1同樣地，切斷最初的保鮮膜之刺穿 工序爲1階段，由大齒之刺穿時的間距比實施例1較爲小， 所以需要比實施例1更大的切斷力。 (比較例3 ) -30- (27) 200800735 第1 1圖，係在中央區域設置7個大齒和6個中齒之切斷 刀刃的中央區域之放大圖。使用具備該切斷刀刃之包裝容 器進行切斷力測定。爲了使從中央區域到側部區域之切開 圓滑順利，並不使齒高不同的齒交互地配置，而是在中心 部排列大齒，在其外側排列中齒，但在切斷最初的保鮮膜 之刺穿的工序中，因爲由大齒之刺穿時的間距比實施例1 較爲小，所以需要比實施例1更大的切斷力。可知即使這 # 樣單純地將大齒、中齒排列，也無法得到切斷力降低之效 果。 (比較例4) 第1 2圖，係將中央區域的齒之形狀作爲等腰三角形而 設置5個大齒之切斷刀刃的中央區域之放大圖。使用具備 該切斷刀刃之包裝容器進行切斷力測定。與中央區域的大 齒之個數同樣爲5個的比較例1相比較，因爲齒間間距變窄 ，所以需要比比較例1更大的切斷力。 (比較例5) 第1 3圖，係將中央區域的齒之形狀作爲等腰三角形而 設置7個大齒之切斷刀刃的中央區域之放大圖。使用具備 該切斷刀刃之包裝容器進行切斷力測定。與中央區域的齒 之個數同樣爲7個的比較例2相比較，因爲齒間間距變窄， 所以需要比比較例2更大的切斷力。 -31 - (28) (28)200800735 (比較例6 ) 第1 4圖，係將中央區域的齒之形狀作爲等腰三角形而 設置11個大齒之切斷刀刃的中央區域之放大圖。使用具備 該切斷刀刃之包裝容器進行切斷力測定。雖中央區域之尺 寸係與比較例2同等，但齒的個數比比較例2增加，所以對 於切斷最初的保鮮膜之刺穿需要較大的力量，因此所需要 的切斷力係比比較例2還更大。 (比較例7) 第1 5圖，係將中央區域的齒之形狀作爲等腰三角形， 而將中央區域的大齒之齒尖角度作爲80° °之切斷刀刃的 中央區域之放大圖。使用具備該切斷刀刃之包裝容器進行 切斷力測定。與中央區域的齒之個數相同而中央區域的大 齒之齒尖角度爲60°之比較例5相比，需要比比較例5相當 大的切斷力。可以認爲是因爲在將齒尖角度變大時，對於 切斷最初的保鮮膜之刺穿，需要更大的力量。 (比較例8) 第1 6圖，係將中央區域的齒之形狀作爲等腰三角形， 而將齒的尺寸變小之切斷刀刃的中央區域之放大圖。使用 具備該切斷刀刃之包裝容器進行切斷力測定。雖使用中齒 但與齒的個數同樣爲1 1個之比較例6相比，需要比比較例6 更大的切斷力。可以認爲是因爲齒變小，所以對於切斷最 初之刺穿需要更大的力量。與中央區域寬度大致同等之比 -32- (29) (29)200800735 較例5相比，需要比比較例5更大的切斷力。可以認爲是因 爲齒的個數變多，對於切斷最初的保鮮膜之刺穿需要較多 的力量。 表1 中央區 域寬度 (mm) 大齒的 高度 (mm) 中央區 域的齒 的形狀 齒尖 角度 (° ) 屬於中央區域 切斷 力(g) 大齒 (個） 中齒 (個) 小齒 (個） 實施例1 46.58 2.2 圓弧 60 5 8 2 330 比較例1 16.24 2.2 圓弧 60 5 0 0 418 比較例2 24.36 2.2 圓弧 60 7 0 0 436 比較例3 43.9 2.2 圓弧 60 7 6 0 473 比較例4 11.12 2.4 等腰 三角形 60 5 0 0 498 比較例5 16.68 2.4 等腰 三角形 60 7 0 0 514 比較例6 23.18 2 等腰 三角形 60 11 0 0 557 比較例7 20.24 2 等腰 三角形 80 7 0 0 706 比較例8 17.38 1.5 等腰 三角形 60 0 11 0 1081 <切斷性試驗2 > 其次，在具有第2圖所示的結構之切斷刀刃中，準備 切斷刀刃的刀刃寬度d不同的3種切斷刀刃，進行切斷性 試驗2。具體上，實施例2的刀刃寬度d爲6 mm，實施例3 的刀刃寬度d爲7 mm，實施例4的刀刃寬度d爲8 mm。另 -33- (30) 200800735 外’這些各切斷刀刃的材質、中央區域以及側部區域的齒 之結構，係與實施例1中所使用的切斷刀刃相同。各切斷 刀刃，係與切斷性試驗i同樣地被粘接在包裝容器上。接 著，將收納在該容器內之聚偏二氯乙烯之保鮮膜與切斷性 試驗1同樣地實際地切斷，並測定切斷力。 (實施例2、3、4) φ 將測定結果顯示於表2中。實施例2、3、4的平均値都 爲45 0g〜460g。即使改變切斷刀刃的刀刃寬度，對於切斷 力也幾乎沒有差異。另外，根據本測定方法之現行的註冊 商標“ N E W夕b 7 V 7° ”所使用的金屬製切斷刀刃之切斷 力爲3 0 0 g〜5 0 0 g。本發明之實施形態的實施例2、3、4之 生物降解性樹脂切斷刀刃，係顯示具有與現行的金屬製切 斷刀刃同等的切斷力。 另外，由於切斷性試驗1中所使用的切斷刀刃之刀刃 ® 寬度d爲7 mm，因此實施例1與實施例3之切斷刀刃相同 。切斷性試驗1與切斷性試驗2之切斷力的値之所以不同， . 可以認爲是，因在這些試驗中所使用的切斷刀刃是1片1片 ， 以手工製作成的，齒尖緣之粗細或者包裝容器之強度、包 裝容器與切斷刀刃之間的粘接狀態等各不相同。 -34- (31) 200800735 表2 η 實施例2 實施例3 實施例4 1 410 420 53 0 2 460 390 45 0 3 360 420 500 4 480 420 420 5 500 480 440 6 440 520 470 7 480 520 420 8 490 530 460 9 500 500 420 10 480 440 440 平均 460 464 455 <官能性試驗1 >The central region 28 of the present embodiment is composed of fifteen teeth 3 5, 3 6 and 38 as clearly shown in Fig. 2 . There are three types of teeth in the central region: small teeth 3 5 having the same size as the side teeth 3 1 of the side portion 30, and teeth larger than the small teeth 35 (2nd tooth: hereinafter referred to as "medium tooth") 36. and a tooth larger than the middle tooth 36 (first tooth: hereinafter referred to as "large tooth") 38. Further, in the following description, letters are appropriately added to the reference symbols 36 and 38 of the middle teeth and the large teeth. One of the large teeth 38 is located at the apex portion of the V-shaped cutting blade 24 (the center in the longitudinal direction of the center region 28), and the other large teeth 38b and 38c are centered on the large tooth 3 8 A at the center. Two at a certain interval. The tooth tip of the first large tooth 38A in the center and the tooth tips of the second and third large teeth 38b and 38c on the left and right sides can be connected in a straight line, and the straight line on the left and right sides (the first straight line) L1 is located at a position on the front side of the tooth tip of the middle tooth 36 on the left and right sides of the central region 28 (away from the side of the front end edge of the front wall 22 of the cover). Further, the middle teeth 3 6 in the central region 28 are arranged in four on the left and right sides, for a total of eight. The four middle teeth 36A and 36b on the center side are arranged at a constant interval between the large teeth 3 8 A, 3 8 b, and 3 8 c, and the other four middle teeth 3 6 c and 36 d are arranged at the same interval. On the outside of the third large tooth 38c. The tooth tips of the middle teeth 36A, 36b, 36c, and 36d on the left and right sides can be connected by a straight line (second straight line) L2, and the straight line L2 on the left and right sides is substantially parallel to the straight line L1 - 13 - 200800735 (10) It is parallel and located at a position closer to the rear side than the straight line L 1 (near the side of the front end edge of the front wall 22 of the cover). Further, a straight line (third straight line) L3 connecting the tooth tips of the side teeth 3 1 in the side regions 30 on the left and right sides is substantially parallel to the straight line L1 and the straight line L2 on the same side, and is located at a line L1 and the straight line L2 are located on the rear side (near the side of the front end edge of the front wall 22 of the cover). That is, the straight line L2 on each of the left and right sides extends between the straight lines L1 and L3. Further, the small teeth 35 of the central portion 28 are disposed between the third and fourth intermediate teeth 36c, 36d on the left and right sides, and the tooth tips are located at the connecting side regions 30. An extension line of the straight line L 3 of the tooth tip of the side tooth 3 1 . In the cutting blade 24 of the present embodiment, the tip angle α (Fig. 2) of the small teeth 35, the middle teeth 36, the large teeth 38, and the side teeth 31 is suitable for piercing the wrap film 1 4 angles. In the present embodiment in which the wrap film 14 is made of polyvinylidene chloride, the range of the tooth tip angle α is preferably in the range of from 30 ° to 90 °, more preferably in the range of from 40 ° to 70 °. This is because if it is larger than 90 ° °, it requires a lot of force in order to penetrate the wrap film 14; if it is less than 3 0 . It will damage the durability of the teeth 3 1 to 3 8 themselves. Further, the respective shapes of the small teeth 35, the middle teeth 36, the large teeth 38, and the side teeth 3 1 may be simple isosceles triangles, but in the present embodiment, they are formed as oblique sides. The shape of the arc-shaped fan-shaped shape that is recessed toward the inside or the shape of the ginkgo leaf is suitable. This is to maintain the tip angle α at the acute angle described above and to improve the durability. Further, in the case of such a shape, in the same length range, the number of teeth can be made smaller as an isosceles triangle, and it is helpful to reduce the force required for cutting, which is carried out later - 14 - (11 ) 200800735 Narrative. Next, a case where the wrap film 14 is cut by using the packaging container 10 having the cutting blade 24 of the present embodiment will be described. First, as shown in Fig. 1, the packaging container 10 is held by one hand, and the end portion of the wrap film 14 is held by the other hand, and the required amount is pulled out. Then, the thumb of the hand holding the packaging container 10 is brought close to the central portion of the front wall 22 of the cover body, and the packaging container 1 is twisted toward the front side, i.e., in the direction of the arrow symbol A. At this time, first, the first large tooth 38A located at the apex portion of the cutting blade 24 comes into contact with the wrap film 14, and is pierced. Further, at about the same time, the second large tooth 38b and the third large tooth 38c are in contact with the wrap film 14 and pierced. Thus, since the first contact with the wrap film 14 is only the maximum of the five large teeth 3 8 having a large inter-tooth spacing, the force of the twist-wrapped packaging container 10 can be solved at the beginning of the cutting. That is, since the minimum force necessary for each large tooth 38 to pierce the wrap film 14 is constant, the force of only 5 times the force is the minimum force to twist the packaging container. As in the past, the angle of the tooth tip is reduced, and the pitch between the teeth is reduced. In the blade, since the number of teeth in contact with the wrap film 14 is large, the force applied to the package 10 is inevitable. Larger, the feeling of use is also damaged, but there is no such problem in the present embodiment. Next, the middle teeth 36 are in contact with the wrap film 14, and the middle teeth 36 are passed through the wrap film 14 . Here, if it is assumed that there is no middle tooth 36, since the pitch between the large teeth 38 is large, the valley between the teeth 38 becomes resistance', and a large force is required for the slitting of the wrap film 14. However, in the embodiment of the present invention, 15-(12) 200800735, the plastic wrap 1 4 ' between the large teeth 38 is penetrated by the piercing of the plastic wrap 14 of the large teeth 38. Therefore, the wrap film 14 can be pierced smoothly. In addition, the number of the middle teeth 36 which are in contact with the wrap film 14 is at most 8, but the number of the middle teeth 36 which are in contact with the wrap film 14 at the same time is less than 8, and is also stabbed by the large teeth 38. The wrap film 14 is worn to make the peripheral portion fragile, so the force required for piercing by the middle teeth 36 is smaller than when the large teeth 38 are pierced. In this way, the cutting of the first stage φ by the large teeth 38 and the cutting of the second stage by the middle teeth 36 can be smoothly performed without giving the user a sense of repulsion. Further, when the packaging container 10 is twisted in the direction of the arrow symbol A, the small teeth 35 of the central portion 28 pierce the wrap film 14 between the teeth of the third and fourth teeth 36c, 36d, and the wrap film 14 The meeting is made to advance toward the side area 30. As long as the initial piercing portion of a sufficient size is formed on the wrap film 14, no particularly large force is required for cutting the wrap film 14, and the side portion 30 formed by the side teeth 31 can be smoothly cut. The plastic wrap 14 is cut off. When the cutting blade 24 of the present embodiment is used, a particularly large force is not required when the wrap film 14 is cut, which reduces the tooth tips of the teeth 3 1 , 3 5 , 3 6 , and 3 8 . The necessity that the angle α is excessively small can further improve the durability of each of the teeth 3 1 , 3 5 , 3 6 , and 38 . Further, when the tooth height (protrusion amount) of the large teeth 38 and the middle teeth 36 is excessively increased, the distance from the fixed portion of the cutting blade 24, that is, the distance from the front end edge of the front wall 22 of the cover body becomes Long, it may damage its durability. Also, if the tooth height is large, the hand of the person using the packaging container 10 may be injured. Therefore, from the aspects of cutting property, durability, and safety, it can be set as follows - (13) 200800735: For example, the tooth height HI of the large teeth 38 of the central portion 28 is preferably 1.0 to 4.0 mm. More preferably, it is set to 1.2~3 · 5 mm, and further more preferably set to 1.5~3.0 mm; and the tooth height H2' of the middle tooth 36 is set to be 1·〇~3.0 mm, more preferably ideally set to 1· 2~2.5 mm; and the tooth height Η3 of the small tooth 35 is set to 0 · 5~2 · 5 mm is more ideal 'more ideally set to 0 · 6 〜 2 · 0 mm. Further, the inter-tooth pitch of the central portion 28 may be set such that a large tooth φ 38 is preferably 3.0 to 9.0 mm, more preferably 4. 〇 to 7·0 mm, and still more preferably 4.5 〜. 6·0 mm; and the middle teeth 36 are also set to be 3 · 0 to 9 · 0 mm, more preferably 4 · 0 to 7.0 mm, and even more preferably 4 · 5 to 6.0 mm. This is because, when the inter-tooth spacing exceeds 9.0 mm, in the first stage of the wrap of the wrap film 14, the wrap film 14 is caught on the valley between the large teeth 38 to cause an obstacle to the cutting; When the pitch is narrower than 3.0 mm, the number of teeth provided in the central portion 28 increases, and as a result, the force required for piercing becomes large, and the object of the present invention cannot be achieved. The tooth height Η 3 of the side teeth 3 1 of the side portion 30 can be set to 0.3 to 2.5 mm, more preferably 0.5 to 2.0 mm. Further, the pitch between the teeth of the side teeth 31 is preferably 1.0 to 3.2 mm, more preferably 1 to 2 to 2·5 mm. [Second Embodiment] Fig. 3 is an enlarged view of a central portion of a resin cutting blade according to a second embodiment of the present invention. The cutting blade 24 of the second embodiment has a structure similar to that of the central portion 28 of the cutting blade 24 of the first embodiment in the central region 28 of -17-(14) 200800735. However, the cutting blade 24 of the second embodiment is different from the cutting blade 24 of the first embodiment in that it has two kinds of side teeth 'of different sizes in the side region. Fig. 4 is a partially enlarged view showing a side portion of one side of a resin cutting blade according to a second embodiment of the present invention. The cutting blade 24 of Fig. 4 is provided in the side portion 30 with a plurality of φ side teeth (hereinafter referred to as "side first teeth") 3 1 having the same size as the small teeth 35; A side tooth (hereinafter referred to as a "side second tooth") 32 that is smaller than the side first tooth 31 is sandwiched between the side first teeth 31. On the side portion 30, the side first teeth 3 1 are arranged adjacent to the middle edge 3 6 d belonging to the central portion 28 and are alternately spaced at a certain interval in the longitudinal direction of the cutting blade 24. The side second teeth 3 2 and the side first teeth 31 are disposed. Further, in Fig. 4, only five side teeth ' are shown for convenience, but the side first teeth 31 and the side second teeth 32 are alternately provided to the ends of the cutting blades 24. Further, in Fig. 4, only one side region of the cutting blade 24 is shown. However, the cutting blade 24 is symmetrically provided with the same tooth structure in the other side region. The tip of the plurality of side first teeth 3 1 disposed in the side region 30 and the tip of the small teeth 35 of the central portion 28 can be connected by a straight line, and the straight line (third straight line) L3 The line L1 connecting the tooth tip of the large tooth and the line L2 connecting the tooth tip of the middle tooth are substantially parallel, and are located on the rear side of the straight line L1 and the line L2 (near the front end edge of the front wall 22 of the cover body) The location. Further, the tooth tips of the plurality of side second teeth 32 can be connected by a straight line, and the straight line (fourth straight line) L4 is parallel to the straight lines LI, L2, and L3 substantially -18-(15) 200800735, and It is located at a position further rearward than the straight lines L1, L2, and L3 (near the side of the front end edge of the front wall 22 of the cover). In the cutting blade 24 of the present embodiment, the tooth tip angle α of each of the small teeth 35, the middle teeth 36, the large teeth 38, the side first teeth 31, and the side second teeth 32 (Fig. 3) The angle is set to be suitable for piercing the wrap film 14 . In the present embodiment in which the wrap film 14 is made of polyvinylidene chloride, the tooth tip angle α is 3 〇 . The range of ~90° is ideal, and it is more preferably in the range of 40° to 70°. # This is because, if it is greater than 90°, it is necessary to wear a large amount of plastic wrap 14 . If it is less than 30 °, it will damage the durability of the teeth 3 1~3 8 itself. The shape of each of the teeth 35, the middle teeth 36, the large teeth 38, the side first teeth 31, and the side second teeth 32 may be a simple isosceles triangle, but in the present embodiment, it is a hypotenuse It is suitable to form an arc-shaped fan-shaped expanded shape that is recessed toward the inner side or a ginkgo leaf shape. This is to maintain the tip angle α at the acute angle described above and to improve the durability. In addition, when ® is used as such a shape, the number of teeth can be made smaller than that of an isosceles triangle in the same length range, and it is possible to reduce the force required for cutting. Next, a case where the wrap film 14 is cut by using the packaging container 10 having the cutting blade 24 of the present embodiment will be described. As in the first embodiment described above, first, as shown in Fig. 1, the packaging container 1 is held by one hand, and the end portion of the wrap film 14 is held by the other hand, and the pull-out is required. The amount. Then, the thumb of the hand holding the packaging container 10 is brought close to the central portion of the front wall 22 of the cover body, and the packaging container 10 is twisted toward the front side, that is, in the direction of the arrow symbol Α. Cutting of the present embodiment -19- (16) 200800735 The blade 24 has a structure in which the central portion 28 has the same teeth as the central portion of the cutting blade of the first embodiment described above. Therefore, similarly to the first embodiment, it is easy to form the initial piercing portion of the sufficient size on the wrap film 14, and the cutting blade 24 of the present embodiment has the structure of the teeth as shown in Fig. 4 in the side portion. ? Therefore, after the "piercing" of the wrap film 14 is performed in the central region 28 of the cutting blade 24, the first teeth 31 disposed on the side of the φ side near the central region 28 are in contact with the wrap film 14, and Start "cutting". After the "cutting" by the side first tooth 31 is performed to some extent, the wrap film 14 is in contact with the plurality of side second teeth 32 disposed near the central region 28, and the wrap film 14 is attached. Cut and cut. As shown in Fig. 4, the cutting blade of this embodiment having the side teeth (the side first teeth 31 and the side second teeth 3 2) having different sizes from each other is provided in the side portion. In the case of the transition from the "piercing" stage to the "cutting" stage and the "cutting" stage, the number of side teeth that are in contact with the fresh-keeping film 14 at the same time is reduced, so that it is possible to The force required for the transition from the piercing phase to the incision phase and the force required for the incision phase to be performed become smaller. When the cutting blade 24 of the present embodiment is used, when the wrap film 14 is cut, the wrap film 14 is cut. It does not require a particularly large force, and the necessity of excessively reducing the tooth tip angle α of each of the teeth 31, 32, 35, 36, and 38 is reduced, and the teeth 31, 32, 35, and 36 can also be made. The durability of 38 is improved. When the tooth height (protrusion amount) of the large teeth 38 and the middle teeth 36 is excessively increased, the distance from the fixed portion of the cutting blade 24 is cut, that is, from the front wall 22 of the cover body. 20- (17) The distance from the front edge of 200800735 becomes longer and may impair its durability. 'If the tooth height is large, the hand of the person using the packaging container 10 may be injured. Therefore, it can be set in terms of cutting property, durability, and safety: for example, the tooth height of the large tooth 38 of the central portion 28 Η 1, the system is preferably set to 〜4·0 mm, more preferably 1.2 to 3.5 mm, still more preferably 1.5 to 3.0 mm; and the tooth height H2 of the middle tooth 36 is set to 1·〇~ 3·0 mm is ideal, more preferably 1.2~2.5 mm; and the tooth height φ Η 3 of the small tooth 35 is preferably 0.5~2 · 5 mm, more ideally 0 · 6~2 · 0 mm ° The distance between the teeth of the central area 2 8 can be set as follows: 3.0 to 9.0 mm between the large teeth 38 is ideal, more preferably 4.0 to 7.0 mm, and even more preferably 4.5 to 6.0. Mm; and the middle teeth 36 are also preferably set to 3·〇~9.0 mm, more preferably 4.0~7.0 mm, and even more preferably 4.5~6.0 mm. This is because the spacing between the teeth exceeds 9 When 〇mm, in the first stage of the wrap film 14, the cling film 14 will be stuck on the valley between the large teeth 38 to cause an obstacle to the cutting; When the pitch is narrower than 3.0 mm, the number of teeth provided in the central portion 28 is increased, and as a result, the force required for piercing becomes large, and the object of the present invention cannot be attained. The side portion of the side region 30 The tooth height Η 3 ' of the first tooth 3 1 can be set to 〇·3 to 2.5 mm, more preferably 〇. 5 to 2.0 mm. Further, the tooth height H4 of the second tooth 32 of the side is It can be set to 〇·3~1·5 mm, which is ideally set to 〇. 5~1 · 2 mm. Further, the pitch between the teeth of the side first teeth 3 1 and the side second teeth 3 2 can be preferably 1·〇 to 3.5 mm, more preferably - 21 - (18) 200800735 is set to 1.2 to 3.0 Mm. Since the cutting blade 24 is provided with such a tooth in the side portion 30, the cutting of the wrap film can be performed more smoothly. [THIRD EMBODIMENT] Fig. 5 is a partially enlarged view showing a side portion of one side of a resin cutting blade according to a third embodiment of the present invention. The cutting blade 24 of Fig. 5 has a structure similar to the central region 28 of the first and second sinus-like cutting blades 24, although not shown. However, the cutting blade 24 of Fig. 5 is provided with a side tooth (hereinafter referred to as "side third tooth") 33 which is smaller than the small tooth 3 5 in the side portion 30; The third teeth 3 3 are sandwiched by the plurality of side teeth (hereinafter referred to as "side 4th teeth") 34 which are larger than the small teeth 35 and smaller than the middle teeth 36, and the first and second implementations The shape cutting blade 24 is different. The side third teeth 33 are disposed in the side region 30 so as to be adjacent to the middle edge 36d belonging to the center region 28, and the side third teeth 33 are alternately disposed in the longitudinal direction of the cutting blade 24, and Side 4th teeth 34 ^. Further, in Fig. 5, only four side teeth are shown for convenience, but in reality, the side third teeth 33 and the side fourth teeth 34 are alternately disposed to the end of the cutting-blade 24. . Further, in Fig. 5, only one side region of the cutting blade 24 - is shown, but the cutting blade 24 has the same tooth structure symmetrically in the other side region. The tooth tips of the plurality of side fourth teeth 34 disposed in the side region 30 are connectable in a straight line, and the straight line (the fifth straight line) L5 is connected to the straight line L1 connecting the tooth tips of the large teeth. The straight line L2 of the tooth tip of the middle tooth is substantially parallel, and is located at a position closer to the rear side than the straight line L 1 and the straight line 1^2 (near the side of the front end edge of the front wall 22 of the cover body 22-(19) 200800735). Further, the tooth tips of the plurality of side third teeth 3 3 can be connected by a straight line, and the straight line (the sixth straight line) L6 is substantially parallel to the straight lines L1, L2, and L5, and is located at a line longer than the straight line LI. L2 and L5 are located on the rear side (near the side of the front end edge of the front wall 22 of the cover). Further, the tip of the small tooth 35 in the central portion is located between the straight line L5 and the straight line L6. In the cutting blade 24 of the present embodiment, the tooth tip angle α of each of the small teeth 35, the middle teeth 36, the large φ teeth 38, the side third teeth 3 3, and the side fourth teeth 3 4 (5th) Fig.) is set to an angle suitable for piercing the wrap film 14. In the present embodiment in which the wrap film 14 is made of polyvinylidene chloride, the tooth tip angle α is preferably in the range of 30° to 90°, more preferably in the range of 40° to 70°. This is because if it is larger than 90°, a large force is required for piercing the wrap film 14; if it is less than 30°, the durability of the teeth 3 3 to 38 itself is impaired. Further, the shape of each of the small teeth 35, the middle teeth 36, the large teeth 38, the side third teeth 3 3, and the side portions 4 and the fourth teeth 34 may be a simple isosceles triangle, but in this case In the embodiment, it is preferable that the shape of the arc-shaped fan that is recessed inward as the oblique side or the shape of the ginkgo leaf is formed. This is to maintain the sharp angle α of the teeth at the acute angle described above and to improve the durability. Further, when it is such a shape, the number of teeth can be made smaller than that of the isosceles triangle in the same length range, and it is helpful to reduce the force required for cutting. Next, a case where the wrap film 14 is cut by using the packaging container 10 having the cutting blade 24 of the present embodiment will be described. In the same manner as the first embodiment described above, first, as shown in Fig. -23-(20) 200800735, the packaging container 10 is held by one hand, and the front end of the wrap film 14 is held by the other hand. And pull out the amount needed. Then, the thumb of the hand holding the packaging container 10 is brought close to the central portion of the front wall 2 2 of the lid body, and the packaging container 10 is twisted toward the front side, that is, the direction of the arrow symbol A. The cutting blade 24 of the present embodiment has a structure in which the center portion 28 has the same teeth as the central portion of the cutting blade of the first embodiment described above. Therefore, as in the first embodiment, it is easy to form an initial piercing portion of a sufficient size on the wrap film 14. The cutting blade 24 of the present embodiment has a structure of a tooth as shown in Fig. 5 in a side portion. Therefore, the "piercing" of the wrap film 14 is performed by the central region 28 of the cutting blade 24, and then the fourth teeth 34 disposed adjacent to the central portion 28 are in contact with the wrap film 14, and are transferred to "cut". . After the "cutting" by the side fourth teeth 34 is performed to some extent, the wrap film 14 is in contact with the plurality of side third teeth 3 3 disposed near the central portion 28, and the wrap film 14 The system is cut and cut. As shown in Fig. 5, if the cutting blade 24 having the side fourth teeth 34 which is larger than the small teeth 35 is used, the "piercing" stage can be more smoothly performed. The transfer of the stage. Further, since the side portion 30 is provided with two types of side teeth (the side third teeth 33 and the side fourth teeth 34) having different sizes from each other, the "clearing" stage is simultaneously brought into contact with the wrap film 14. The number of side teeth is reduced, and the force required for the "cutting" can be made smaller. When the cutting blade 24 of the present embodiment described above is used, a particularly large force is not required when the wrap film 14 is cut, which reduces the number of teeth 33, -24-(21) (21) 200800735 3 4 , The necessity of the tooth tip angle α of 3 5, 3 6 and 3 8 is excessively small, and the durability of each of the teeth 3 3, 3 4, 3 5, 3 6 and 38 can be improved. Further, when the tooth height (protrusion amount) of the large teeth 38 and the middle teeth 36 is excessively increased, the distance from the fixed portion of the cutting blade 24, that is, the distance from the front end edge of the front wall 22 of the cover body becomes long. May damage and its durability. Also, if the tooth height is large, the person who uses the packaging container 10 may be injured. Therefore, it can be set in terms of cutting property, durability, and safety. For example, the tooth height Η 1 of the large tooth 38 of the central portion 28 is preferably 1·〇 to 4.0 mm, and more preferably set. 1.2~3.5 mm, further ideally set to 1.5~3.0 mm; and the tooth height H2 of the middle tooth 36 is preferably 1.0~3.0 mm, more preferably 1.2~2.5 mm; and the teeth of the small tooth 35 Sorghum 3, set to 0 · 5~2.5 mm is ideal, more ideally set to 〇. 6~2.0 mm ° The distance between the teeth of the central area 2 8 can be set as follows: 3.0 between the large teeth 38 ~9.0 mm is more desirable, more preferably 4.0~7.0 mm, and even more ideally set to 4·5~6.0 mm; and the middle teeth 36 are also set to 3.0~9.0 mm, more ideally 4.0. ~7.0 mm, further more ideally set to 4.5~6.0 mm. This is because, when the inter-tooth spacing exceeds 9.0 mm, in the first stage of the wrap of the wrap film 14, the wrap film 14 is caught on the valley between the large teeth 38, thereby causing an obstacle to the cutting; When the pitch between the teeth is narrower than 3.0 mm, the number of teeth provided in the central portion 28 is increased, and as a result, the force required for piercing becomes large, and the object of the present invention cannot be attained. The tooth height Η6 of the side third tooth 33 of the side portion 30 can be set to 0.3 -25- (22) 200800735 〜1 ·5 mm, more preferably 〇·5~1 · 2 mm degree. Further, the tooth height Η 5 of the fourth fourth teeth 34 can be set to 〇 5 to 2 · 0 mm, more preferably 1.7 to 1.8 mm. Further, the pitch between the teeth of the third third teeth 33 and the fourth fourth teeth 34 can be set to 1. 〇 〜 3 · 0 mm is preferable, and more preferably 1.5 to 2.5 mm. By the structure in which the cutting blade 24 is provided with such a tooth in the side region 30, the cutting of the wrap film can be performed more smoothly [Modification of the first, second, and third embodiments] Fig. 6 is the first A partially enlarged view of an end portion of a side portion of one side of the cutting blade according to a modification of the second or third embodiment. The cutting blade 24 of FIG. 6 is provided at an end portion of the outer side of the side portion 30, that is, at both end portions of the cutting blade 24, and has a portion other than the outer end portion of the side portion 30. The teeth of the side teeth are larger. At the outer end portion of the side portion 30, the teeth 39 and the side teeth (the side first teeth 31) are alternately arranged at regular intervals in the length ® direction of the cutting blade 24. The tooth tips of the teeth 39 can be connected in a straight line, and the straight line L7 is substantially parallel to the straight line connecting the tooth tips of the side teeth disposed in the other portions of the side portion 30 (for example, the straight lines L3 and L4) The ground is parallel and located at a position on the front side of the straight line (away from the side of the front end edge of the front wall 22 of the cover). In Fig. 6, although only one side region of the cutting blade 24 is shown, the cutting blade 24 has the same tooth structure symmetrically in the other side region. The cutting blade 24 of the present embodiment has two teeth 39 in each of the side portions 30. -26- (23) 200800735 If the cutting blade 24 having such a configuration is provided, even if the wrap film is cut from the end portion, the teeth disposed on the outer end portion of the side portion 30 can be provided. 39, to "pierce" the wrap film 14. Thereafter, a plurality of side teeth disposed near the end portion of the side portion 30 are brought into contact with the wrap film 14 to perform "cutting". Thereby, the wrap film 14 is smoothly cut and cut. Further, the tooth height Η7 of the teeth 39 disposed on the outer end portion of the side portion 30 can be set to be φ in terms of cutting property, durability, and safety: for example, 1.0 to 4.0 mm is set. Ideally, it is more preferably set to the extent of 1.2 to 2.5 mm. Further, the inter-tooth pitch of the teeth 39 disposed on the outer end portion of the side portion 30 is, for example, 3.0 to 9 mm, more preferably 4.0 to 7.0 mm, and more preferably 4.5 to 4.5. 6.5 mm. By having such a configuration of the teeth at the end portion of the cutting blade 24 on the outer side of the side portion 30, the cutting of the wrap film can be smoothly performed even when the wrap film is cut from the end portion of the wrap film. Broken. Further, the number of the teeth 3 9 placed on the cutting blade 24 is preferably 2 to 10 degrees. Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. For example, Fig. 7 is an enlarged view of a central portion of a resin cutting blade according to another embodiment of the present invention. In the side portion 30 of the cutting blade of Fig. 7, two side teeth 31 and 37 of different sizes are alternately provided in the longitudinal direction. Next, the straight line L2 connecting the tips of the teeth 36 in the central portion 28 passes through the tip of the side teeth 37 of the side portion 30. Further, a straight line L3 connecting the tooth tips of the small teeth 35 of the central portion 28 and the tooth tips of the side teeth 31 of the side portion 30 is a tooth -27 that connects the large teeth 38 of the central portion 28 (24) 200800735 The straight line L 1 and the straight line L2 are substantially parallel, and are located on the rear side (the side closer to the front end edge of the front wall 22 of the cover body) than the straight line L1 and the straight line L2. When the cutting blade 24 shown in Fig. 7 is used, the wrap film is formed in the center portion with a small force in the same manner as in the first, second, and third embodiments described above. After the piercing portion, it is smoothly cut and easily cut. Further, in each of the above embodiments, the wrap film is made of polyvinylidene chloride #ethylene, but the present invention can also be applied to a wrap film composed of another resin. In this case, the tooth height, the inter-tooth pitch, the tip angle, and the like can be appropriately changed from the above dimensions. Further, the number of teeth constituting the central region may be larger or smaller than the above-described respective embodiments, but it is necessary to form the wrap film in contact with the teeth in two or more stages. Further, the roll-shaped packaged article is not only a wrap film but also an aluminum foil or paper. Further, the cutting blade is preferably a biodegradable resin in each of the above embodiments, but may be another resin or a non-metal such as a resin such as a vulcAnized fiber or a resin impregnated paper. Etc. The same can be applied to the present invention. [Examples] Next, the cutting property of the wrap film which was tried in accordance with the present invention was evaluated as follows. In addition, it is noted that the invention was carried out after the trial cutting, careful examination, and evaluation of the cutting blades shown in Comparative Examples 1 to 8 described below, and the invention of the present invention was created in -28-200800735 (25). <Cutting property test 1> In this test, nine kinds of biodegradable resin sheets (three wells) having different tooth structure, tooth height, inter-tooth pitch, tooth shape, and tooth tip angle in the central region were prepared. Chemical company's product name: b〆シ7 LACEA TOF-250 thickness 0.25 mm) cutting blade. The structure of the teeth in the central portion of each cutting blade is as shown in Table 1. Further, in the side portion of each cutting blade, a conventional small tooth as shown in Fig. 2 is provided. Each of the cutting blades is bonded to a packaging container (approximately 31 cm in length, 4.5 cm in width, and 4.5 cm in height) used in the registered trademark "NEW eve b 7 7 7 °" manufactured and sold by Wu Yu. Paper container). Then, the wrap film of polyvinylidene chloride contained in the packaging container was actually cut. The cutting force was measured using a measuring machine as shown in Fig. 8. Fig. 8 is a schematic diagram (longitudinal sectional view) showing the cutting force measuring machine and the measuring method of the evening b 7 7 7° (registered trademark mentioned above). The measurement method will be described below. First, the packaging container 10 is placed on a cardboard box (cArton) setting table of the measuring device, and the wrap film 14 pulled out from the packaging container 10 is fixed to the fixing jig 42 of the measuring device equipped with the push-pull force gauge 40 ( Figure 8 (A)). Next, while the lid body 18 is fixed so as not to be separated from the packaging container 10, the packaging container 1 is rotated at a rotational speed of 90° per second in the direction of the arrow symbol B, and the axis of the paper tube 12 of the wrap film is used. The heart P is rotated centrally (Fig. 8(b)). By this, the wrap film 14 is pressed by the cutting blade 24. It is measured by the force gauge 40 -29-(26) 200800735 The rotational force required for cutting the wrap film 14 by the cutting blade 24. The maximum enthalpy of the rotational force when the wrap film 14 was cut was measured as the cutting force. The measured cutting force is shown in Table 1. (Example 1) 'Measurement was carried out using a packaging container having a cutting blade shown in Fig. 2 . The cutting force was 303 g, which showed the most excellent cutting property among the measured biodegradable resin cutting blades. (Comparative Example 1) Fig. 9 is an enlarged view showing a central region of a cutting blade of five large teeth in a central portion. The cutting force was measured using a packaging container having the cutting blade. The piercing step of cutting the first wrap film is one step, and the pitch when piercing the large teeth is smaller than that of the first embodiment, so that a cutting force larger than that of the first embodiment is required. (Comparative Example 2) Fig. 1 is an enlarged view of a central region of a cutting blade of seven large teeth in a central region. The cutting force was measured using a packaging container having the cutting blade. In the same manner as in Comparative Example 1, the piercing step of cutting the first wrap film was one step, and the pitch when piercing the large teeth was smaller than that of Example 1, so that a cutting force larger than that of Example 1 was required. . (Comparative Example 3) -30- (27) 200800735 Fig. 1 is an enlarged view showing a central region of a cutting blade of seven large teeth and six middle teeth in a central portion. The cutting force was measured using a packaging container having the cutting blade. In order to make the cutting from the central region to the side region smooth and smooth, the teeth having different tooth heights are not alternately arranged, but the large teeth are arranged at the center portion, the middle teeth are arranged on the outer side, but the initial plastic wrap is cut. In the step of piercing, since the pitch at the time of piercing by the large teeth is smaller than that in the first embodiment, a cutting force larger than that of the first embodiment is required. It is understood that even if the large teeth and the middle teeth are simply arranged, the effect of reducing the cutting force cannot be obtained. (Comparative Example 4) Fig. 12 is an enlarged view showing a central region of a cutting blade of five large teeth, in which the shape of the tooth in the central region is an isosceles triangle. The cutting force was measured using a packaging container having the cutting blade. In comparison with Comparative Example 1 in which the number of large teeth in the central region is five, since the inter-tooth pitch is narrowed, a larger cutting force than Comparative Example 1 is required. (Comparative Example 5) Fig. 13 is an enlarged view showing a central region of a cutting blade of seven large teeth, in which the shape of the tooth in the central region is an isosceles triangle. The cutting force was measured using a packaging container having the cutting blade. In comparison with Comparative Example 2 in which the number of teeth in the central region is seven, since the inter-tooth pitch is narrowed, a larger cutting force than Comparative Example 2 is required. -31 - (28) (28) 200800735 (Comparative Example 6) Fig. 14 is an enlarged view showing a central region of a cutting blade of eleven large teeth, in which the shape of the tooth in the central region is an isosceles triangle. The cutting force was measured using a packaging container having the cutting blade. Although the size of the central region is the same as that of Comparative Example 2, the number of teeth is larger than that of Comparative Example 2. Therefore, a large force is required for cutting the first wrap film, so the required cutting force ratio is compared. Example 2 is still bigger. (Comparative Example 7) Fig. 15 is an enlarged view showing a shape of a tooth in a central region as an isosceles triangle, and a tooth tip angle of a large tooth in a central region as a central region of a cutting blade of 80°. The cutting force was measured using a packaging container having the cutting blade. In comparison with Comparative Example 5 in which the number of teeth in the central portion is the same as that in the central portion and the tooth tip angle of the large tooth in the central region is 60°, a relatively large cutting force is required as compared with Comparative Example 5. It can be considered that when the angle of the tip is made larger, more force is required for cutting the piercing of the original wrap film. (Comparative Example 8) Fig. 16 is an enlarged view of a central region of a cutting blade in which the shape of the tooth in the central region is an isosceles triangle and the size of the tooth is reduced. The cutting force was measured using a packaging container having the cutting blade. Although the middle teeth were used, the cutting force larger than that of Comparative Example 6 was required as compared with Comparative Example 6 in which the number of teeth was also 11. It can be considered that because the teeth become smaller, it requires more force to cut off the initial piercing. A ratio substantially equal to the width of the central region -32- (29) (29) 200800735 A larger cutting force than Comparative Example 5 is required as compared with Example 5. It can be considered that since the number of teeth is increased, it takes a lot of force to cut the first wrap. Table 1 Center area width (mm) Height of large teeth (mm) Shape of teeth in the center area Tip angle (°) Center area cut-off force (g) Large teeth (one) Medium teeth (one) Small teeth Example 1 46.58 2.2 Arc 60 5 8 2 330 Comparative Example 1 16.24 2.2 Arc 60 5 0 0 418 Comparative Example 2 24.36 2.2 Arc 60 7 0 0 436 Comparative Example 3 43.9 2.2 Arc 60 7 6 0 473 Comparison Example 4 11.12 2.4 Isosceles triangle 60 5 0 0 498 Comparative example 5 16.68 2.4 Isosceles triangle 60 7 0 0 514 Comparative example 6 23.18 2 Isosceles triangle 60 11 0 0 557 Comparative example 7 20.24 2 Isosceles triangle 80 7 0 0 706 Comparative Example 8 17.38 1.5 Isosceles Triangle 60 0 11 0 1081 <Cutting property test 2 > Next, in the cutting blade having the structure shown in Fig. 2, three kinds of cutting blades having different blade widths d of the cutting blade are prepared, and the cutting property test 2 is performed. Specifically, the blade width d of Example 2 was 6 mm, the blade width d of Example 3 was 7 mm, and the blade width d of Example 4 was 8 mm. Further, -33- (30) 200800735 The material of each of the cutting blades, the central portion, and the teeth of the side regions are the same as those of the cutting blade used in the first embodiment. Each of the cutting blades was bonded to the packaging container in the same manner as the cutting property test i. Then, the wrap film of polyvinylidene chloride contained in the container was actually cut in the same manner as in the cutting property test 1, and the cutting force was measured. (Examples 2, 3, 4) φ The measurement results are shown in Table 2. The average enthalpy of Examples 2, 3 and 4 was 45 0 g to 460 g. Even if the blade width of the cutting blade is changed, there is almost no difference in the cutting force. Further, the cutting force of the metal cutting blade used in the current registered trademark "N E W b 7 V 7 °" according to the present measurement method is 300 g to 500 g. The biodegradable resin cutting blades of Examples 2, 3 and 4 according to the embodiment of the present invention have the same cutting force as the conventional metal cutting blades. Further, since the cutting edge ® width d of the cutting blade used in the cutting property test 1 was 7 mm, the cutting blades of the first embodiment and the third embodiment were the same. The cutting force test 1 differs from the cutting force of the cutting test 2, and it is considered that the cutting blade used in these tests is one piece and one piece is hand-made. The thickness of the sharp edge of the tooth or the strength of the packaging container, and the bonding state between the packaging container and the cutting blade are different. -34- (31) 200800735 Table 2 η Example 2 Example 3 Example 4 1 410 420 53 0 2 460 390 45 0 3 360 420 500 4 480 420 420 5 500 480 440 6 440 520 470 7 480 520 420 8 490 530 460 9 500 500 420 10 480 440 440 Average 460 464 455 <Functionality Test 1 >
使用與在實施例2、3、4中所使用的同等的包裝容器 ，進行官能性試驗1。10個測試者（monitor)進行從上述包 裝容器拉出的保鮮膜之切斷，以“良好”、“稍稍良好” 、“普通”、“不良”來判定切斷時之切斷鋒利度。 官能性試驗1之結果，實施例2、3、4之切斷鋒利度全 都爲“良好”或“稍稍良好”。另外，在使用以往的金屬 製之切斷刀刃時，雖然具有瞬間將保鮮膜切開之觸感’但 是在樹脂製的切斷刀刃之情況下，在切斷之初期具有撲喃 撲喃的刺穿觸感，這一點與金屬製的切斷刀刃不同。 -35- (32) (32)200800735 <耐久性試驗> 將具有第2圖所示的結構之實施例1的切斷刀刃安裝在 註冊商標“N EW々7 7° ”的包裝容器上，進行將聚偏 二氯乙烯之保鮮膜切斷200次之耐久性試驗。其結果，幾 乎無法確認生物降解性樹脂製的切斷刀刃之損傷，可知實 際應用上沒有問題。 <切斷性試驗3 > 在該試驗中，準備3種側部區域的齒之結構不同的切 斷刀刃。另外，這些各切斷刀刃之材質、厚度以及中央區 域的齒之結構，係與在實施例1中所使用的切斷刀刃相同 。各切斷刀刃，係與切斷性試驗1同樣地被粘接在包裝容 器上。接著，將收納在該包裝容器內之聚偏二氯乙烯之保 鮮膜與切斷性試驗1同樣地實際地切斷，並測定切斷力。 (實施例5、6、7) · 具體上，切斷性試驗3中所使用的切斷刀刃，係第2圖 所明示的切斷刀刃（實施例5);具有第3圖所明示的齒之結 構的切斷刀刃（實施例6);以及在中央區域具有第3圖所明 示的齒之結構及在側部區域具有第5圖所明示的齒之結構 的切斷刀刃（實施例7)。即，這些3種切斷刀刃，係中央區 域的齒之結構是相同的，但側部區域的齒之結構相互不同 〇另外，實施例5的切斷刀刃係與在實施例1中所使用的切 -36 - 200800735 (33) 斷刀刃同等。將各切斷刀刃之在側部區域中的側部齒之結 構顯示在表3中。 表3 側部齒的 高度（mm) 側部齒的 間距（mm) 側部齒 的形狀 齒尖（° ) 實施例5 1 · 2 2.2 圓弧 60 實施例6 1.2 0.8 1.8 圓弧 6 0 實施例7 1.4 1.0 2.0 圓弧 60The functional test 1 was carried out using the same packaging containers as used in Examples 2, 3, and 4. Ten monitors cut the wrap film pulled out from the above-mentioned packaging container to "good" "Slightly good", "normal", "bad" to determine the sharpness of the cut. As a result of the functional test 1, the cut sharpness of Examples 2, 3, and 4 was all "good" or "slightly good". In addition, when the conventional cutting blade made of metal is used, the touch of the wrap film is instantaneously cut. However, in the case of a cutting blade made of resin, the piercing of the film is punctured at the initial stage of cutting. The touch is different from the metal cutting blade. -35- (32) (32) 200800735 <Durability Test> The cutting blade of Example 1 having the structure shown in Fig. 2 was mounted on a packaging container of the registered trademark "N EW 々 7 7 °" A durability test in which the wrap film of polyvinylidene chloride was cut 200 times was performed. As a result, it was almost impossible to confirm the damage of the cutting blade made of the biodegradable resin, and it was found that there was no problem in practical application. <Cutting property test 3 > In this test, three kinds of cutting edges having different tooth structures in the side regions were prepared. Further, the material of each of the cutting blades, the thickness, and the structure of the teeth of the central portion are the same as those of the cutting blade used in the first embodiment. Each of the cutting blades was bonded to the packaging container in the same manner as the cutting property test 1. Then, the wrap film of polyvinylidene chloride contained in the packaging container was actually cut in the same manner as in the cutting property test 1, and the cutting force was measured. (Examples 5, 6, and 7) - Specifically, the cutting blade used in the cutting property test 3 is a cutting blade shown in Fig. 2 (Example 5); and the teeth shown in Fig. 3 are provided. The cutting blade of the structure (Example 6); and the structure of the teeth shown in Fig. 3 in the central region and the cutting blade having the structure of the teeth shown in Fig. 5 in the side region (Example 7) . In other words, the three types of cutting blades have the same structure of the teeth in the central portion, but the structures of the teeth in the side regions are different from each other. Further, the cutting blade of the fifth embodiment is used in the first embodiment. Cut-36 - 200800735 (33) The cutting edge is equal. The structure of the side teeth in the side regions of each cutting blade is shown in Table 3. Table 3 Height of side teeth (mm) Spacing of side teeth (mm) Shape of side teeth (°) Example 5 1 · 2 2.2 Arc 60 Example 6 1.2 0.8 1.8 Arc 6 0 Example 7 1.4 1.0 2.0 Arc 60
第1 7圖，係顯示在切斷性試驗3的實施例5之相對於包 裝容器的旋轉角度之旋轉力的推移之折線圖。第1 8圖，係 顯示在切斷性試驗3的實施例6之相對於包裝容器的旋轉角 度之旋轉力的推移之折線圖。第1 9圖，係顯示在切斷性試 驗3的實施例7之相對於包裝容器的旋轉角度之旋轉力的推 移之折線圖。第17圖、第18圖、第19圖所示的各個（A)、 (b)、（c)以及（d)之4個折線圖所示之結果，係使用同一包 裝容器而以相同測定方法所測定的。 第17圖、第18圖、第19圖之橫軸係包裝容器之旋轉角 度（° )，縱軸係旋轉力（對於旋轉所必需的力量（g))。實施 例5、實施例6、實施例7的包裝容器之切斷刀刃，係都顯 示出優異的切斷性。 <官能性試驗2 > -37 - 200800735 (34) 使用與在實施例5、實施例6、實施例7使用的包裝容 器同等的包裝容器，進行官能性試驗2。1 0個測試者（第1 組）和不屬於第1組的1 7個測試者（第2組）進行保鮮膜之切 斷，以表4所示的判定基準進行評價。 表4 判定 評價分數 好切 5分 稍稍好切 4分 普通 3分 稍稍難切 2分 難切 1分Fig. 17 is a line graph showing the transition of the rotational force with respect to the rotation angle of the package container in the fifth embodiment of the cutting test 3. Fig. 18 is a line graph showing the transition of the rotational force with respect to the rotation angle of the packaging container of Example 6 of the cutting test 3. Fig. 19 is a line diagram showing the displacement of the rotational force with respect to the rotation angle of the packaging container of the seventh embodiment of the cutting test 3. The results shown in the four line graphs of each of (A), (b), (c), and (d) shown in Figs. 17, 18, and 19 are the same measurement method using the same packaging container. Measured. In the 17th, 18th, and 19th, the horizontal axis is the rotation angle (°) of the packaging container, and the vertical axis is the rotational force (the force (g) necessary for the rotation). The cutting blades of the packaging containers of Example 5, Example 6, and Example 7 all showed excellent cutting properties. <Functionality Test 2> -37 - 200800735 (34) The functional test was carried out using the same packaging containers as those used in Example 5, Example 6, and Example 7. 2. 10 testers ( The first group) and the seventeen testers (the second group) not belonging to the first group were cut off of the wrap film, and evaluated according to the criteria shown in Table 4. Table 4 Judgment Evaluation score Good cut 5 points Slightly good cut 4 points Normal 3 points Slightly difficult to cut 2 points Difficult to cut 1 point
第20圖，係顯示由第1組進行的官能性試驗2之評價分 數的平均分之柱狀圖。第20圖中，（A)爲使用與實施例5同 等的包裝容器之情況，（b)爲使用與實施例6同等的包裝容 器之情況，（〇爲使用與實施例7同等的包裝容器之情況。 根據第20圖所記載之結果可知，與實施例5的包裝容 器之切斷刀刃相比，實施例6以及實施例7的包裝容器之切 斷刀刃更好切。這是由於，在側部區域交互地配置大小2 種側部齒的實施例6以及實施例7之切斷刀刃’與在側部區 域僅具有尺寸相同的側部齒的實施例5之切斷刀刃相比’ 可更順利地進行在保鮮膜的切斷中的從刺穿階段往切開階 段之轉移以及切開階段之進行。 -38- 200800735 (35) 第2 1圖，係顯示在由第2組進行的官能性試驗2中，在 3種包裝容器中評定最高的評價分數的包裝容器之測試者 的人數之柱狀圖。第21圖中，（A)爲使用與實施例5同等的 包裝容器之情況，（b)爲使用與實施例6同等的包裝容器之 情況，（e)爲使用與實施例7同等的包裝容器之情況。 根據第2 1圖所記載的結果可知，在實施例5、實施例6 、實施例7之中，實施例6的包裝容器之切斷刀刃爲最好切 φ 的。可知，實施例6的包裝容器之切斷刀刃中的側部區域 的齒之結構，在保鮮膜之切斷時，能使從刺穿階段往切開 階段之轉移、以及切開之進行更加順利化。 【圖式簡單說明】 第1圖，係顯示應用本發明的包裝容器1 0的形態之立 體圖。 第2圖，係本發明的第一實施形態的樹脂製之切斷刀 • 刃的中央部之放大圖。 第3圖，係本發明的第二實施形態的樹脂製之切斷刀 刃的中央部之放大圖。 第4圖，係本發明的第二實施形態的樹脂製之切斷刀 刃之單側的側部區域之一部分放大圖。 第5圖，係本發明的第三實施形態的樹脂製之切斷刀 刃之單側的側部區域之一部分放大圖。 第6圖，係第一、第二或第三實施形態的變形例之切 斷刀刃的單側之側部區域的端部之一部分放大圖。 -39- 200800735 (36) 第7圖，係本發明之其他的實施形態的樹脂製之切斷 刀刃的中央部之放大圖。 第8圖，係顯示夕b y 7° (註冊商標）切斷力測定機 以及測定方法之槪略圖（縱剖面圖）。 第9圖，係在中央區域設置5個大齒之切斷刀刃的中央 區域之放大圖。 第10圖，係在中央區域設置7個大齒之切斷刀刃的中 φ 央區域之放大圖。 第1 1圖，係在中央區域設置7個大齒和6個中齒之切斷 刀刃的中央區域之放大圖。 第12圖，係將中央區域的齒之形狀作爲等腰三角形而 設置5個大齒之切斷刀刃的中央區域之放大圖。 第1 3圖，係將中央區域的齒之形狀作爲等腰三角形而 設置7個大齒之切斷刀刃的中央區域之放大圖。 第1 4圖，係將中央區域的齒之形狀作爲等腰三角形而 ® 設置Π個大齒之切斷刀刃的中央區域之放大圖。 第1 5圖，係將中央區域的齒之形狀作爲等腰三角形， . 而將中央區域的大齒之齒尖角度作爲80°之切斷刀刃的中 ^ 央區域之放大圖。 第16圖，係將中央區域的齒之形狀作爲等腰三角形， 而將齒的尺寸變小之切斷刀刃的中央區域之放大圖。 第1 7圖，係顯示在切斷性試驗3的實施例5之相對於包 裝容器的旋轉角度之旋轉力的推移之折線圖。 第1 8圖，係顯示在切斷性試驗3的實施例6之相對於包 -40- (37) 200800735 裝容器的旋轉角度之旋轉力的推移之折線圖。 第19圖，係顯示在切斷性試驗3的實施例7之相對於包 裝容器的旋轉角度之旋轉力的推移之折線圖。 第20圖，係顯示由第1組進行的官能性試驗2之評價分 數的平均分之柱狀圖。 第21圖，係顯示在由第2組進行的官能性試驗2中，在 3種包裝容器中評定最高的評價分數的包裝容器之測試考 φ 的人數之柱狀圖。 【主要元件符號說明】 1〇 :包裝容器 1 2 :紙管 14 :保鮮膜. 1 6 :容器主體 1 8 :蓋體 ❿ 20 :容器主體的後面壁之頂部邊緣 22 :蓋體的前面壁 24 :切斷刀刃 26:容器主體的前面壁之底邊 2 8 :中央區域 3 〇 :側部區域 31 :側部第1齒（側部齒） 32 :側部第2齒（側部齒） 33 :側部第3齒（側部齒） -41 - (38) 200800735 34 :側部第4齒（側部齒） 3 5:小齒 3 6 :中齒（第2齒） 37 :側部齒 38 :大齒（第1齒） 3 9 :齒 40 ··推拉力計（push pull gAuge)Fig. 20 is a bar graph showing the average score of the evaluation scores of the functional test 2 performed by the first group. In Fig. 20, (A) is a case where a packaging container equivalent to that of the fifth embodiment is used, and (b) is a case where a packaging container equivalent to that of the sixth embodiment is used, and (the same as the packaging container of the seventh embodiment) According to the results shown in Fig. 20, the cutting blades of the packaging containers of Examples 6 and 7 were better than the cutting blades of the packaging container of Example 5. This is because the side is The sixth embodiment in which the two regions of the two types of side teeth are alternately arranged and the cutting blade of the seventh embodiment are compared with the cutting blade of the fifth embodiment having the same size side teeth in the side portion. The transfer from the piercing stage to the incision stage and the incision stage during the cutting of the wrap film are carried out smoothly. -38- 200800735 (35) Figure 21 shows the functional test conducted by the second group. (2) A histogram of the number of testers of the packaging container which has the highest evaluation score among the three types of packaging containers. In Fig. 21, (A) is a case where the packaging container equivalent to that of the fifth embodiment is used, (b) ) in order to use the same packaging container as in Example 6 (e) is the case where the packaging container equivalent to that of the seventh embodiment is used. According to the results described in Fig. 2, in the fifth, sixth and seventh embodiments, the packaging container of the sixth embodiment The cutting blade is preferably cut to φ. It is understood that the structure of the teeth in the side portion of the cutting blade of the packaging container of the sixth embodiment can be cut from the piercing stage to the cutting stage when the wrap film is cut. [Brief Description of the Drawings] Fig. 1 is a perspective view showing a form of a packaging container 10 to which the present invention is applied. Fig. 2 is a resin made of the first embodiment of the present invention. Fig. 3 is an enlarged view of a central portion of a resin cutting blade according to a second embodiment of the present invention. Fig. 4 is a second embodiment of the present invention. A partially enlarged view of one side of a side surface of a cutting blade made of a resin. Fig. 5 is a partially enlarged view showing a side region of one side of a resin cutting blade according to a third embodiment of the present invention. Figure 6, is the first, second or first In the modified example of the third embodiment, a part of the end portion of the side portion of the cutting blade is enlarged. -39- 200800735 (36) Fig. 7 is a resin cut of another embodiment of the present invention. An enlarged view of the center of the blade. Fig. 8 shows a schematic diagram (longitudinal section) of the cutting force measuring machine and the measuring method of the 7° (registered trademark) cutting force. Fig. 9 shows five sets in the center area. An enlarged view of the central region of the cutting edge of the large tooth. Fig. 10 is an enlarged view of the middle φ central region of the cutting blade of seven large teeth in the central region. Fig. 1 is a central region setting 7 An enlarged view of the central region of the cutting blade of the large tooth and the six middle teeth. Fig. 12 is an enlarged view of the central region of the cutting blade in which the shape of the tooth in the central region is set as an isosceles triangle and five large teeth are provided. Figure. Fig. 13 is an enlarged view showing a central region of a cutting blade of seven large teeth, in which the shape of the tooth in the central region is an isosceles triangle. Fig. 14 is an enlarged view of the central region of the cutting blade of the large tooth with the shape of the tooth in the central region as the isosceles triangle. In Fig. 15, the shape of the tooth in the central region is taken as an isosceles triangle, and the angle of the tooth tip of the large tooth in the central region is taken as an enlarged view of the central region of the cutting blade of 80°. Fig. 16 is an enlarged view showing a central region of a cutting blade in which the shape of the tooth in the central region is an isosceles triangle and the size of the tooth is reduced. Fig. 17 is a line graph showing the transition of the rotational force with respect to the rotation angle of the package container in the fifth embodiment of the cutting test 3. Fig. 18 is a line graph showing the transition of the rotational force of the rotation angle of the container of Example 6 of the cutting test 3 with respect to the package -40-(37) 200800735. Fig. 19 is a line graph showing the transition of the rotational force with respect to the rotation angle of the package container of the seventh embodiment of the cutting test 3. Fig. 20 is a bar graph showing the average score of the evaluation scores of the functional test 2 performed by the first group. Fig. 21 is a bar graph showing the number of persons of the test test φ of the packaging container which evaluated the highest evaluation score among the three kinds of packaging containers in the functional test 2 performed by the second group. [Description of main component symbols] 1〇: packaging container 1 2 : paper tube 14 : plastic wrap. 1 6 : container main body 1 8 : cover ❿ 20 : top edge 22 of the rear wall of the container main body: front wall 24 of the cover body : Cutting blade 26: Bottom side of the front wall of the container body 2 8 : Center area 3 〇: Side area 31 : Side part 1 tooth (side tooth) 32 : Side part 2 tooth (side tooth) 33 : Side 3rd tooth (side tooth) -41 - (38) 200800735 34 : Side 4th tooth (side tooth) 3 5: Small tooth 3 6 : Middle tooth (2nd tooth) 37 : Side tooth 38: Large tooth (1st tooth) 3 9 : Teeth 40 · Push pull gAuge
42 :固定治具42: fixed fixture
-42--42-