201200423 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種容器本體及其製造方法、以及包裝容 . m細而言’係關於-種可適宜地作為殺菌食品等各 #食品及藥品、化妝品等之包裝容器的材料而使用之容器 . 本體及其製造方法、以及使用其之包裝容器。 【先前技術】 先前’作為食品等之包裝形態，有如下包裝容器：於填 充食时等之後’對設置於容器本體之開口部周緣的凸緣部 及膜狀之蓋材進行熱密封而進行密封包裝。就此種包裝容 器而言，開封前之密封性較為重要，且另一方面，對開封 時之易開封性亦有要求。因此，通常已知有改變樹脂材質 等來控制容器本體之密封層的密封強度，且將蓋材與容器 本體之界面剝離的技術。 又，例如，揭示有不於蓋材與容器本體之界面（密封層） 上剝離，而於容器本體之内外層剝離，並且於凸緣部之容 器開口部側的内包裝中設有切口之簡易揭除容器（參照文 獻1 :曰本專利特開昭62-251363號公報）。又，揭示有使自 • 容器本體之側壁至凸緣部之反曲點上之最内層薄壁化，而 • 調整最内層之剝離強度的包裝容器（參照文獻2 :日本專利 特公平5-795 87號公報進而，揭示有於容器本體之容器 側面及凸緣内緣之交界位置上局部地形成密封層之缺口 部’而調整剝離強度之包裝容器（參照文獻3 :日本專利特 開平7-309368號公報）。又，揭示有於凸緣部，使内緣部之 155292.doc 201200423 厚度相對於其外緣部之厚度為20%以上98%以下之包裂办 器（參照文獻4 :曰本專利特開2009-255976號公報）。 然而，控制密封強度之方法易受密封條件之影 ^ 且強 度易產生差異。X，於文獻丄中，為了形成切口部而需花 費勞力及時間，因而存在對成本功能方面造成負擔之門 «I。又，存在若未使谷器之密封部與切口部隔開—定以 之距離，則難以保持密封性之問題，且密封部之位置抑制 較為重要，因而技術上之難度較高，且容易變得難以生J 產。進而，於文獻2及文獻3中，因容器之最内層的厚度不 穩疋，或無法穩定地形成缺口部，而存在造成難以開封之 ㈣或者密封性受損的問題。又，文獻4所揭示之包裝容 器必的使用特殊之密封條，並且於製造步驟中必需注意凸 緣部之變形及翹曲，就此等方面而言，並不完善。 【發明内容】 因此’本發明之目的在於提供—種可製作具有穩定之易 開封性及較高之密封性之包裝容器的容器本體及其製造方 法、以及使用其之包裝容器。 為了解決上述，本發明提供如下之容器本體及其製 造方法、以及包裝容器。 即本發明之容器本體之製造方法的特徵在於：其係由 至；包含密封層及基材層這2層的片材成形而&、且於開 口部：緣具有凸緣部之容器本體的製造方法，該容器本體 之製這方法包括谷器本體成形步驟，該步驟中，使用對成 為上述凸緣部之上述片材之一部分進行擠壓的凸緣擠壓構 155292.doc 201200423 件、及使上述片材熱成形為上述容器本體之模具，一面藉 由上述凸緣擠壓構件以10 kg/cm2以上25 kg/cm2以下之壓 力對成為上述凸緣部之上述片材進行擠壓，一面進行熱成 形，從而於上述容器本體之開口部端緣形成上述密封層之 薄壁部或者缺口部。 於本發明之容器本體之製造方法中，較佳為，上述容器 本體成形步驟後的上述凸緣部之厚度相對於上述容器本體 之材料片材之厚度為20%以上95%以下。 再者，作為凸緣部，並不限於包含自開口部端緣平行地 延伸之平坦面的平坦狀凸緣部，亦可為設置有自平坦面之 外周緣於大致鉛垂方向延伸之梯度的套筒狀凸緣部、或彎 曲設置有平坦面之外周緣的捲曲狀凸緣部。於此等情形 時，受上述凸緣擠壓構件擠壓的片材之一部分均為平坦 面〇 於本發明之容器本體之製造方法中，較佳為，上述密封 層之熔融指數（Melt Index，MI)值大於上述密封層所鄰接 之鄰接層的MI值，且上述密封層之MI值與上述密封層所 鄰接之層的MI值之差為3 g/10 min以上。 於本發明之容器本體之製造方法中，較佳為，上述凸緣 擠壓構件及上述模具於1〇。(：以上160°C以下之溫度下擠壓 上述凸緣部。 本發明之第1容器本體之特徵在於：其係由至少包含密 封層及基材層這2層的片材成形而成 '且於開口部端緣具 有凸緣部者，上述凸緣部之厚度為成形前之片材之厚度的 155292.doc 201200423 20%以上95%以下’並且於上述開口部端緣具有上述密封 層之薄壁部或者缺口部。 本發明之第2容器本體之特徵在於：其係藉由上述容器 本體之製造方法而獲得者。 本發明之包裝容器之特徵在於包含：本 容器本體；以及蓋材，其以堵塞上述容器本體之H 方式密封於上述容器本體之凸緣部。 再者，本發明之容器本體之製造方法係由至少包含密封 層及基材層這2層的片材成形而成的容器本體之製造方 法’且一面藉由上述凸緣擠壓構件以1〇 kg/cm2以上Μ kg/cm2以下之壓力擠壓上述凸緣部，一面熱成形上述片 材，然而先前，考慮到對成形機本體及模具之負擔，一般 常識為使上述凸緣擠壓構件所施之壓力不高至必要以上。 相對於此，本發明者顛覆了先前之技術常識，發現即便使 上述凸緣擠壓構件所施之壓力非常高，如達到1〇 kg/cm2以 上，亦可於製造步驟中不花費勞力，而獲得於容器本體之 開口部端緣即凸緣部之内周侧具有上述密封層之薄壁部或 者缺口部的容器本體。 根據本發明’可提供一種可製作具有穩定之易開封性及 較高之密封性之包裝容器的容器本體及其製造方法、以及 使用其之包裝容器。 【實施方式】 以下，基於圖式說明本發明之實施形態。 [第一實施形態] 155292.doc 201200423 圖1係表示第一實施形態之包裝容器之密封狀態的立體 圖。圖2係表示第一實施形態之包裝容器的一部分已開封 之狀態的立體圖。圖3係圖1之ΙΙΙ-ΙΠ刳面圖，且圖4係圖2 之IV-IV剖面圖。 (谷器本體、蓋材及包裝容器之構成） 於圖1中’包裝容器100包含凹部210中收納有内容物p的 平面大致圓形狀之容器本體200，且該容器本體2〇〇中為 了堵塞平面大致呈圓形地形成於其中心部之開口部22〇， 將蓋材300熱密封於包含自開口部22〇之周緣平行地突設之 平坦面的平坦狀之凸緣部230上。該凸緣部230與蓋材300 之熱密封係由環狀之密封部240進行。 如圖1及圖2所示’包裝容器1〇〇係藉由握持蓋材300之一 部分突出而成之握持部3 10而將由密封部24〇密封之蓋材 3 00自凸緣部230剝離從而而開封者。 如圖3及圖4所示’容器本體2〇〇由包含密封層251、鄰接 層252及基材層253之多層片材250形成。 密封層251係容器本體2〇〇之最内層，且蓋材3〇〇側之密 封面251A於凸緣部230被蓋材3〇〇密封從而形成密封部 240。再者’於凸緣部230之外緣部231附近，蓋材3〇〇受到 熱密封，然而於凸緣部230之内緣部232附近，蓋材300未 被熱密封。 本實施形態中’密封層251沿凸緣部230之内緣部232缺 損而形成環狀之缺口部25 1B。藉此，於密封蓋材300及容 器本體200時，在凸緣部230之内緣部232附近，蓋材300未 155292.doc 201200423 被密封。缺口部251B是指完全不存在密封層251之部位， 即密封層25 1之厚度為〇 μηι之部位。再者，本實施形態中 雖形成有缺口部25 1Β ’然而亦可形成薄壁部來代替缺口部 25 1Β。此種薄壁部是指厚度相對於成形前之密封層25丨的 厚度為1/2以下（更佳為1/5以下）之部位。 又，凹部210包含形成容器本體200之底的底部211、自 底部211豎立而形成之壁部212、及形成於壁部212之開口 部220側的階梯部2 13。階梯部2 1 3具有較壁部2 12之外周更 向外側突出之外周。 (包裝容器之構成材料） 繼而，針對包含容器本體2〇〇及蓋材3〇〇之包裝容器1〇〇 的構成材料進行詳述。 密封層251設置為，其與蓋材3〇〇密封之一側可自鄰接層 252剝離。密封層251與鄰接層252之剝離強度可設定為〇.5 kg/15 mm以上2.5 kg/15 mm以下之範圍内。若密封層251與 接層252之剝離強度小於〇_5 kg/1 5 mm，則有損害密封性 之虞，又，若超過2.5 kg/1 5 mm，則不易自鄰接層252剝離 在封層2 5 1，從而難以開封。較佳之剝離強度範圍為〇 5 kg/15 mm以上 1.3 kg/15 mm以下。 又，該多層片材250成形為容器本體200之前，密封層 251之厚度較佳為1〇 μιη以上1〇〇 μηι以下之範圍且可根據 谷器之尺寸、用途適當地調製。若成形前之密封層251的 厚度小於10 ，則與蓋材300密封時，密封層251不穩 定，因此難以自鄰接層252剝離。又，若密封層251之厚度 155292.doc 201200423 超過100 μιη ’則因厚至必要以上故而不實用。 作為密封層251之樹脂，只要為具有熱密封性之材料， 並無特別限定。作為此種樹脂，可舉例如均聚聚丙烯 (Homo P〇ly Propylene，Ηρρ)、無規聚丙烯（Rand〇m Propylene，RPP)、嵌段聚丙烯（B1〇ck p〇ly Pr〇pylene， BPP)等聚丙烯系樹脂；高密度聚乙烯（High Denshy p〇iy201200423 VI. Description of the Invention: [Technical Field] The present invention relates to a container body, a method for manufacturing the same, and a packaging container. The present invention relates to a food product such as a sterilized food product. A container used for the material of a packaging container such as cosmetics. The body, the method of manufacturing the same, and the packaging container using the same. [Previous Art] As a packaging form of food or the like, there is a packaging container which is sealed by heat-sealing a flange portion and a film-shaped lid member provided on the periphery of the opening of the container body after filling or the like. package. In the case of such a packaging container, the sealing property before opening is important, and on the other hand, the opening property at the time of opening is also required. Therefore, a technique of changing the sealing strength of the sealing layer of the container body by changing the resin material or the like and peeling off the interface between the lid member and the container body is generally known. Further, for example, it is disclosed that the outer layer of the container body is peeled off without peeling off the interface between the lid member and the container body (sealing layer), and the slit is easily provided in the inner package on the side of the container opening portion of the flange portion. The container is removed (refer to Japanese Laid-Open Patent Publication No. SHO 62-251363). Further, a packaging container which thins the innermost layer from the side wall of the container body to the inflection point of the flange portion and adjusts the peeling strength of the innermost layer is disclosed (refer to Japanese Patent Laid-Open No. 5-795). Further, a packaging container in which the notch portion of the sealing layer is partially formed at the boundary between the side surface of the container and the inner edge of the flange of the container body to adjust the peeling strength is disclosed (refer to Japanese Patent Laid-Open No. Hei 7-309368) In addition, it is disclosed that the flange portion has a thickness of 155292.doc 201200423 of the inner edge portion with respect to the thickness of the outer edge portion of 20% or more and 98% or less (refer to Document 4: 曰本Patent Publication No. 2009-255976. However, the method of controlling the sealing strength is susceptible to the sealing condition and the strength is liable to be different. X, in the literature, it takes labor and time to form the cut portion, and thus exists. The door that imposes a burden on the cost function «I. In addition, if the sealing portion of the bar is not separated from the notch portion, it is difficult to maintain the sealing property, and the position of the sealing portion is suppressed. In order to be important, it is technically difficult and it is difficult to produce J. Further, in Documents 2 and 3, the thickness of the innermost layer of the container is unstable, or the notch cannot be stably formed. There is a problem that it is difficult to open the seal (4) or the seal is damaged. Moreover, the packaging container disclosed in Document 4 must use a special sealing strip, and must pay attention to the deformation and warpage of the flange portion in the manufacturing step. Therefore, it is an object of the present invention to provide a container body capable of producing a packaging container having stable easy-opening property and high sealing property, a method of manufacturing the same, and a method of using the same In order to solve the above, the present invention provides a container body, a method of manufacturing the same, and a packaging container. The method of manufacturing the container body of the present invention is characterized in that it comprises: a sealing layer and a substrate layer. a method of manufacturing a container body having a flange portion at the opening portion of the layer, and the method for manufacturing the container body includes the cereal device a forming step of using a flange extrusion structure 155292.doc 201200423 for pressing a portion of the sheet portion to be the flange portion, and a mold for thermoforming the sheet into the mold body of the container body The sheet extrusion member that presses the flange portion is pressed at a pressure of 10 kg/cm 2 or more and 25 kg/cm 2 or less, and is thermoformed to form an opening edge of the container body. Preferably, in the method of manufacturing the container body of the present invention, the thickness of the flange portion after the container body forming step is relative to the material sheet of the container body. The thickness is 20% or more and 95% or less. The flange portion is not limited to a flat flange portion including a flat surface extending from the end edge of the opening portion in parallel, and may be provided with a peripheral edge other than the flat surface. A sleeve-like flange portion having a gradient extending substantially in the vertical direction or a curled flange portion bent to have a peripheral edge other than the flat surface. In such a case, a portion of the sheet extruded by the flange pressing member is a flat surface in the method of manufacturing the container body of the present invention, preferably, the melt index of the sealing layer (Melt Index, The MI) value is larger than the MI value of the adjacent layer adjacent to the sealing layer, and the difference between the MI value of the sealing layer and the MI value of the layer adjacent to the sealing layer is 3 g/10 min or more. In the method of manufacturing a container body according to the present invention, it is preferable that the flange pressing member and the mold are at one turn. (The above-mentioned flange portion is extruded at a temperature of 160 ° C or lower. The first container body of the present invention is characterized in that it is formed of a sheet including at least two layers of a sealing layer and a substrate layer. The flange portion of the opening portion has a flange portion, and the thickness of the flange portion is 155292.doc 201200423 20% or more and 95% or less of the thickness of the sheet before molding, and has a thickness of the sealing layer at the end edge of the opening portion. The second container body of the present invention is obtained by the method for producing the container body. The packaging container of the present invention is characterized by comprising: the container body; and a cover member. The method of manufacturing the container body of the present invention is a container formed by forming a sheet of at least two layers of a sealing layer and a substrate layer. In the method of manufacturing the main body, the sheet is thermally formed by pressing the flange portion at a pressure of 1 〇kg/cm 2 or more and Μ kg/cm 2 or less by the flange pressing member, but previously, the forming is considered. It is a common knowledge that the pressure of the machine body and the mold is such that the pressure applied by the flange pressing member is not higher than necessary. In contrast, the inventors have subverted the prior art and found that even the above-mentioned flange pressing member The applied pressure is very high, and if it is 1 〇kg/cm 2 or more, it is also possible to use no labor in the manufacturing step, and the inner peripheral side of the opening portion of the container body, that is, the inner peripheral side of the flange portion, has the above-mentioned sealing layer. The container body of the wall portion or the notch portion. According to the present invention, a container body capable of producing a packaging container having stable easy-opening property and high sealing property, a method for manufacturing the same, and a packaging container using the same can be provided. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [First Embodiment] 155292.doc 201200423 Fig. 1 is a perspective view showing a sealed state of a packaging container according to a first embodiment. Fig. 2 is a view showing a first embodiment. A perspective view of a portion of the packaging container that has been unsealed. Fig. 3 is a ΙΙΙ-ΙΠ刳 surface view of Fig. 1, and Fig. 4 is a sectional view taken along line IV-IV of Fig. 2. In the packaging container 100, the container body 100 includes a container body 200 having a substantially circular planar shape in which the contents p are accommodated in the recess 210, and the container body 2 has a substantially circular shape for blocking the plane. The lid portion 300 is formed in the opening portion 22 of the center portion, and the lid member 300 is heat-sealed on the flat flange portion 230 including the flat surface projecting from the periphery of the opening portion 22〇 in parallel. The flange portion 230 and the lid The heat seal of the material 300 is performed by the annular seal portion 240. As shown in Figs. 1 and 2, the packaging container 1 is held by the grip portion 3 10 which is partially protruded from the grip cover member 300. The lid member 3 00 sealed by the sealing portion 24 is peeled off from the flange portion 230 to be opened. As shown in Figs. 3 and 4, the container body 2 is formed of a multilayer sheet 250 including a sealing layer 251, an adjacent layer 252, and a substrate layer 253. The sealing layer 251 is the innermost layer of the container body 2, and the cover 251A on the side of the lid member 3 is sealed by the lid member 3 at the flange portion 230 to form the sealing portion 240. Further, in the vicinity of the outer edge portion 231 of the flange portion 230, the lid member 3 is heat-sealed, but in the vicinity of the inner edge portion 232 of the flange portion 230, the lid member 300 is not heat-sealed. In the present embodiment, the sealing layer 251 is formed along the inner edge portion 232 of the flange portion 230 to form an annular notch portion 25 1B. Thereby, when the lid member 300 and the container body 200 are sealed, the lid member 300 is not sealed 155292.doc 201200423 in the vicinity of the inner edge portion 232 of the flange portion 230. The notch portion 251B is a portion where the sealing layer 251 is not present at all, that is, a portion of the sealing layer 25 1 having a thickness of 〇 μηι. Further, in the present embodiment, the notch portion 25 1 Β ' is formed, but a thin portion may be formed instead of the notch portion 25 1 Β. Such a thin portion refers to a portion having a thickness of 1/2 or less (more preferably 1/5 or less) with respect to the thickness of the sealing layer 25A before molding. Further, the recess 210 includes a bottom portion 211 which forms the bottom of the container body 200, a wall portion 212 which is formed to stand up from the bottom portion 211, and a step portion 2 13 which is formed on the opening portion 220 side of the wall portion 212. The step portion 2 1 3 has an outer circumference that protrudes outward from the outer circumference of the wall portion 2 12 . (Construction Material of Packaging Container) Next, the constituent material of the packaging container 1A including the container main body 2〇〇 and the lid member 3〇〇 will be described in detail. The sealing layer 251 is disposed such that it can be peeled off from the adjacent layer 252 on one side of the cover material. The peeling strength of the sealing layer 251 and the adjacent layer 252 can be set within a range of 〇.5 kg/15 mm or more and 2.5 kg/15 mm or less. If the peeling strength of the sealing layer 251 and the bonding layer 252 is less than 〇_5 kg / 15 mm, the sealing property is impaired, and if it exceeds 2.5 kg / 15 mm, it is difficult to peel off the sealing layer from the adjacent layer 252. 2 5 1, making it difficult to open. The preferred peel strength range is 〇 5 kg/15 mm or more and 1.3 kg/15 mm or less. Further, before the multilayer sheet 250 is formed into the container body 200, the thickness of the sealing layer 251 is preferably in the range of 1 μm or more and 1 μm or less, and can be appropriately adjusted depending on the size and use of the grain. If the thickness of the sealing layer 251 before molding is less than 10, the sealing layer 251 is unstable when it is sealed with the lid member 300, so that it is difficult to peel off from the adjacent layer 252. Further, if the thickness 155292.doc 201200423 of the sealing layer 251 exceeds 100 μm η, it is not practical because it is thicker than necessary. The resin as the sealing layer 251 is not particularly limited as long as it is a material having heat sealability. Examples of such a resin include homopolymer polypropylene (Homo P〇ly Propylene, Ηρρ), random polypropylene (RPP), and block polypropylene (B1〇ck p〇ly Pr〇pylene, Polypropylene resin such as BPP); high density polyethylene (High Denshy p〇iy
Ethylene, HDPE)等聚乙烯系樹脂；非晶性聚對苯二甲酸 乙二酯等。 鄰接層252設置為可與密封層251剝離。 作為構成鄰接層252之樹脂，可使用以規定比例調配有 聚丙烯（Poly Propylene，PP)系樹脂及聚乙烯（p〇iyPolyethylene resin such as Ethylene or HDPE); amorphous polyethylene terephthalate. The adjoining layer 252 is disposed to be peelable from the sealing layer 251. As the resin constituting the adjacent layer 252, a polypropylene (Poly Propylene, PP) resin and polyethylene (p〇iy) can be used in a predetermined ratio.
Ethylene，PE)系樹脂之混合樹脂。卯與pE之調配比例未 特別限定，根據與構成密封層251之樹脂的剝離強度而調 配。 ’然而較佳為1 〇 pm以 ’則有於基材層253及 ’鄰接層252之厚度範 鄰接層2 5 2之厚度維未特別限定 上。若鄰接層252之厚度小於1〇 μΓη 鄰接層2 5 2之間發生剝離之虞。再者 圍更佳為5 0 μιη以上。 又作為用於也、封層25 1之樹脂，較佳為，選擇熔融指 數(+MD值大於與密封層251鄰接之鄰接層252所使用之樹脂 的ΜΙ值、並且其等之^^值之差為3 g/1〇 min以上之樹脂。 若MI值之差小於3 g/10 min ’則於開封時密封層251之斷裂 部會外露於凸緣部230上故而不美觀。 基材層253為顯現於容器本體2〇〇之外表面之層。 155292.doc 201200423 作為構成基㈣253之㈣，可舉出㈣㈣樹脂、聚 ^系接m等烯烴系樹脂；韓乙烯系樹脂、聚對苯二甲 :乙-S日（p0ly Ethylene Terephthalate，ΡΕΤ)等聚酷系樹 脂:乙稀·乙稀醇共聚物及其等之混合材料。基材層253之 材料可為單層片材，亦可為積層片材。 形成凸緣部230的基材層253之厚度可根據容器本體2〇〇 之強度等而適當地設定，雖未特別限定、然而較佳為1〇〇 μιη以上，更佳為3〇〇 μιη以上。若厚度小於上述下限則 有容器本體2〇〇之強度變得不足之傾向。 於包含該等密封層251、鄰接層252及基材層253之多層 片材中，亦可於層之間設置接著層或吸氧樹脂層。作為接 著層之構成材料，可舉例如聚胺酯系彈性體、苯乙烯系彈 性體、順丁烯二酸酐改質聚丙烯、乙烯-乙酸乙稀醋 (Ethy】ene-Vinyl Acetate，EVA)等。又，作為吸氧樹脂 層 了舉例如乙細_乙稀醇共聚物（Ethylene-Vinyl alcohol Copolymer，EVOH)等。 作為成形為多層片材250之前的多層片材之製造方法， 可採用共擠壓、乾式層壓、擠壓層壓、擠壓塗佈等方法或 組合此％方法而成之方法。再者’可藉由各層之厚度、樹 脂選定及調配比等調節各層之接著強度。 蓋材300係包含複數層之多層膜。作為蓋材300之層構 成’雖未特別限定，然而可列舉例如ΡΕΤ12 μιη/〇Νγ (Biaxially Oriented Nylon，雙軸延伸尼龍）15 μιη/L-LDPE (Low Density Poly Ethylene，低密度聚乙烯）60 μιη、 • 10_ 155292.doc 201200423 PET12 pm/〇Nyl5 gm/cpp(Cast p〇ly pr〇㈣ene，無延伸聚 丙烯）60 μιη等。 作為成為蓋材3 00之多層膜的製造方法，可採用共擠 壓、熱層壓、乾式層壓等方法或組合其等方法而成之方 法。 (容器本體之製造裝置） 繼而，針對第一實施形態之容器本體2〇〇之製造方法中 所使用的製造裝置進行說明。 圖5係表示第一實施形態之容器本體之製造裝置之一部 分的概略構成圖。 合器本體200係藉由以柱塞助壓真空成形、柱塞助壓壓 空成形等周知之方法對多層片材25〇進行熱成形而形成， 此處，針對其一部分即容器本體成形裝置進行說明。 圖5所示之谷盗本體成形裝置5〇〇係將多層片材熱成 形為容器本體200之裝置。並且，如圖5所示，容器本體成 开ν裝置500包含.模具51〇，其配置在與由多層#材⑽形 成容器本體之開口部220之側相反之側；凸緣擠壓構件 520，其隔著多層片材25〇而配置在與該模具51〇相反之 側，及柱塞530，其形成容器本體之開口部22〇。 模具510中，於中央部形成有凹部5ιι，其用於形成容器 本體之開口部220 ;且於該凹部511之上端緣形成有平面部 512’其用於形成凸緣部230之平坦面。於本實施形態中， 模具510為直徑mm之杯用模具。 凸緣擠壓構件520係藉由擠壓模具51〇之平面部512以及 I55292.doc 201200423 多層片材250,而成形容器本體之凸緣部23〇之平坦面者。 凸緣擠壓構件520具有平坦之擠壓面521，其沿模具51〇 之凹部511之開口部的外緣而形成為環狀之平板狀、且與 模具51G之平面部512相對向。又，凸緣擠壓構件520連結 於彈蒉54G上’且可藉由替換為彈簽常數不同之彈晉而調 整壓力。 柱塞530係以小於模具51〇之凹部5n的直徑而形成為大 致相同之形狀，且隔著多層月材25〇而嵌合於凹部5ιι中。 藉由如上所述之容器本體成形裝置5〇〇 ’將多層片材25〇 送至模具510與凸緣擠壓構件52〇及柱塞53〇之間且於該 狀態下使凸緣擠壓構件520及柱塞53〇移動至模具51〇側， 藉此可於夕層片材25〇上一次性成形用於收納内容物之凹 部210及凸緣部230，而成形為於開口部端緣具有平坦狀之 凸緣部的容器本體2〇〇。 (容器本體之製造方法） 繼而，針對第一實施形態之容器本體2〇〇的製造方法（容 器本體成形步驟）進行說明。 谷器本體200係藉由以柱塞助壓真空成形、柱塞助壓壓 空成形等周知之方法對多層片材25〇進行熱成形而形成， 且上述之容器本體成形裝置500負責其中之一部分。 首先將已加熱並軟化之多層片材250導入至容器本體 成形裝置500中。 於多層片材250到達模具510之上表面側時，使柱塞ye 靠近多層片材250。於該情形時，由柱塞53〇及多層片材 155292.doc •12· 201200423 250所包圍之空間成為密閉狀態 '然後，預成形多層片材 250，並且—面藉由設置在柱塞530之面對多層片材25〇之 側的未圖不之麗空腔室注入高塵空氣而成為壓空狀態，一 ®向凹部511擠覆，進行柱塞助壓壓空成形，從而熱成形 為谷盗本體2〇〇之形狀。 本發月中&進行上述熱成形時，對於在成形後成為凸 緣β 230的夕層片材25G中之—部分（成為凸緣部之平坦面 的部分）’必需一面利用凸緣擠壓構件520及模具510之平 面部512擠壓，—面進行熱成形。 八 並且必需利用彈簧540將凸緣擠壓構件52〇之壓力調整 為〇 kg/em以上25 kg/cm2以下之範圍。於壓力小於1〇 kg/cm2之情形時，難以使密封層251充分地薄壁化或者缺 口化而另—方面，於超過25 kg/cm2之情形時，對多層片 材250過度加熱（壓碎），故而難以構成容器本體。 如圖3及圖4所示，藉由如此所述成形容器本體2〇〇，可 獲付於凸緣部230之内周側（開口部端緣）具有缺口部 251B(或者薄壁部）之容器本體2〇〇。 又，較佳為，將凸緣擠壓構件52〇之溫度調整為丨〇。〇以 上160°C以下之範圍。即便溫度小於1(Γ(：，亦可使密封層 ' 251薄壁化，然而溫度越高，則越可使密封層25 1更加穩定 地溥壁化或者缺口化。另一方面，若溫度超過i 6〇芄，則 因接近於密封層251中所使用之樹脂的熔點，故而存在成 形自身變得不穩定之傾向。 又’此種容器本體成形步驟後之凸緣部230之厚度較佳 155292.doc •13- 201200423Ethylene, PE) is a mixed resin of resin. The blending ratio of bismuth to pE is not particularly limited, and is formulated according to the peeling strength of the resin constituting the sealing layer 251. However, it is preferable that the thickness dimension of the base layer 253 and the adjacent layer 252 adjacent to the thickness of the adjacent layer 252 is not particularly limited. If the thickness of the adjacent layer 252 is less than 1 〇 μΓη, the entanglement between the adjacent layers 2 5 2 occurs. Further, the circumference is preferably more than 50 μmη. Further, as the resin for the sealing layer 25 1 , it is preferable to select a melt index (+MD value is larger than the enthalpy value of the resin used for the adjacent layer 252 adjacent to the sealing layer 251, and the like The resin having a difference of 3 g/1 〇min or more. If the difference in MI value is less than 3 g/10 min ', the fracture portion of the sealing layer 251 is exposed on the flange portion 230 at the time of opening, so that the substrate layer 253 is not aesthetically pleasing. It is a layer which appears on the outer surface of the container body 2 155292.doc 201200423 (4) (4) (4) Resin, olefin-based resin such as poly-methane, and vinyl-based resin, polyethylene terephthalate resin A: Polycarbonate resin such as p-Ethylene Terephthalate (ΡΕΤ): a mixture of ethylene and ethylene copolymers and the like. The material of the substrate layer 253 may be a single-layer sheet or The thickness of the base material layer 253 forming the flange portion 230 can be appropriately set according to the strength of the container body 2, etc., and is not particularly limited, but is preferably 1 μm or more, more preferably 3 〇〇μιη以上. If the thickness is less than the above lower limit, the strength of the container body 2〇〇 becomes In the multilayer sheet including the sealing layer 251, the adjacent layer 252, and the base material layer 253, an adhesive layer or an oxygen absorbing resin layer may be provided between the layers. As a constituent material of the adhesive layer, for example, For example, a polyurethane elastomer, a styrene elastomer, a maleic anhydride modified polypropylene, an ethylene-acetone vinegar (Ethy) ene-Vinyl Acetate (EVA), etc. Further, as an oxygen-absorbing resin layer, for example Ethylene-Vinyl alcohol copolymer (EVOH), etc. As a method of producing the multilayer sheet before forming the multilayer sheet 250, co-extrusion, dry lamination, extrusion lamination, or the like may be employed. A method such as extrusion coating or a method in which the % method is combined. Further, the adhesion strength of each layer can be adjusted by the thickness of each layer, the resin selection, the blending ratio, etc. The lid member 300 is a multilayer film including a plurality of layers. The layer constitution of the lid member 300 is not particularly limited, and examples thereof include, for example, ΡΕΤ12 μηη/〇Νγ (Biaxially Oriented Nylon) 15 μιη/L-LDPE (Low Density Poly Ethylene) 60 μm • 10_ 155292.doc 201200423 PET12 pm/〇Nyl5 gm/cpp (Cast p〇ly pr〇(tetra)ene, no extended polypropylene) 60 μιη, etc. As a method of manufacturing the multilayer film of the cover material 300, co-extrusion can be employed. , a method of heat lamination, dry lamination, or the like, or a combination thereof. (Manufacturing Apparatus of Container Body) Next, a manufacturing apparatus used in the method of manufacturing the container body 2A of the first embodiment will be described. Fig. 5 is a schematic block diagram showing a part of a manufacturing apparatus of a container body according to the first embodiment. The splicing main body 200 is formed by thermoforming a multilayer sheet 25 周 by a known method such as plunger assisted vacuum forming or plunger assisted pressure forming, and is performed on a part of the container body forming apparatus. Description. The stalk body forming apparatus 5 shown in Fig. 5 is a device for thermally forming a multilayer sheet into a container body 200. Further, as shown in FIG. 5, the container body 504 is provided with a mold 51 which is disposed on the side opposite to the side where the opening portion 220 of the container body is formed by the multilayer material (10); the flange pressing member 520, It is disposed on the side opposite to the mold 51A via the multilayer sheet 25, and the plunger 530 forms the opening 22 of the container body. In the mold 510, a concave portion 5 is formed at a central portion for forming an opening portion 220 of the container body, and a flat portion 512' for forming a flat surface of the flange portion 230 is formed at an upper end edge of the concave portion 511. In the present embodiment, the mold 510 is a cup mold having a diameter of mm. The flange pressing member 520 is formed by pressing the flat portion 512 of the mold 51 and the multilayer sheet 250 of I55292.doc 201200423 to form a flat surface of the flange portion 23 of the container body. The flange pressing member 520 has a flat pressing surface 521 which is formed in a circular plate shape along the outer edge of the opening of the concave portion 511 of the mold 51, and which faces the flat portion 512 of the mold 51G. Further, the flange pressing member 520 is coupled to the magazine 54G' and the pressure can be adjusted by replacing it with a different bullet diameter. The plunger 530 is formed in substantially the same shape with a smaller diameter than the concave portion 5n of the mold 51, and is fitted into the concave portion 5 by sandwiching the plurality of moon members 25'. The multilayer sheet 25 is fed to the mold 510 and the flange pressing member 52 and the plunger 53A by the container body forming device 5'' as described above and the flange pressing member is made in this state. The 520 and the plunger 53 are moved to the side of the mold 51, whereby the concave portion 210 and the flange portion 230 for accommodating the contents can be formed at one time on the slab sheet 25, and formed to have an opening end edge. The container body 2 of the flat flange portion. (Manufacturing Method of Container Body) Next, a method of manufacturing the container body 2A of the first embodiment (the container body forming step) will be described. The trough body 200 is formed by thermoforming a multilayer sheet 25 by a well-known method such as plunger assisted vacuum forming or plunger assisted pressure forming, and the above-described container body forming apparatus 500 is responsible for one of the parts. . The heated and softened multilayer sheet 250 is first introduced into the container body forming apparatus 500. When the multilayer sheet 250 reaches the upper surface side of the mold 510, the plunger ye is brought close to the multilayer sheet 250. In this case, the space surrounded by the plunger 53 and the multilayer sheet 155292.doc •12·201200423 250 becomes a sealed state. Then, the multilayer sheet 250 is preformed, and the surface is provided by the plunger 530. The high-dust air is injected into the hollow chamber on the side of the 25-inch sheet of the multilayer sheet to be in a vacuum state, and a ® is pressed toward the concave portion 511 to perform pressure-pressing and forming of the plunger, thereby thermoforming into a valley. Steal the shape of the body. In the above-mentioned hot forming, the portion (the portion which becomes the flat surface of the flange portion) of the layer 25G which becomes the flange β 230 after the molding is required to be pressed by the flange The member 520 and the flat portion 512 of the mold 510 are pressed, and the surface is thermoformed. 8. It is necessary to adjust the pressure of the flange pressing member 52A to a range of 〇 kg/em or more and 25 kg/cm 2 or less by the spring 540. When the pressure is less than 1 〇kg/cm2, it is difficult to sufficiently thinen or notch the sealing layer 251. On the other hand, when the pressure exceeds 25 kg/cm2, the multilayer sheet 250 is excessively heated (crushed). Therefore, it is difficult to form the container body. As shown in FIG. 3 and FIG. 4, the inner peripheral side (opening end edge) of the flange portion 230 is provided with the notch portion 251B (or the thin portion). The container body 2〇〇. Further, it is preferable to adjust the temperature of the flange pressing member 52A to 丨〇. 〇 is above 160 °C. Even if the temperature is less than 1 (Γ(:, the sealing layer '251 can be made thinner, the higher the temperature, the more the sealing layer 25 1 can be more stably walled or notched. On the other hand, if the temperature exceeds i 6 〇芄 is close to the melting point of the resin used in the sealing layer 251, so that the forming itself tends to be unstable. Further, the thickness of the flange portion 230 after the container body forming step is preferably 155292. .doc •13- 201200423
為，相對於容器本體200之絲祖y u ,Q 之材枓片材（多層片材250)之厚度 為20%以上950/〇以下。再者，考古^ ^ ’思到问效地進行密封層2 5 1 之薄壁化或者缺口化，則Λ絡Απ。Λ λ 化則凸緣部230之厚度的上限較佳為 30〇/〇以下’更佳為5〇%以下。 於厚度小於上述下限2〇%之 情形時，則難以構成容器本體， 十祖 旳另一方面，於超過上述 上限9 5 %之情形時，存在雜7你— 卞仔在難以使密封層251薄壁化或者缺 口化’而變得難以開封之傾向。 (包裝容器之製造方法） 繼而，針對製造第__眚· %你# > a # a ^ 貫施形態之包裝容器100的方法進 行說明。 首先，於如上所述獲得之容器本體200中注入且填充作 為内容物P之液體。 然後，將蓋材300載於容器本體200之凸緣部23〇上並 對其等進行熱密封。熱密封之強度比多層片材25〇之密封 層251與鄰接層252之接著強度更強。熱密封之接著強度可 藉由溫度、壓力、時間等熱密封條件、各層之厚度、樹脂 選定等適當地調整。 熱在、封係自蓋材300上方將密封條擠壓至凸緣部230之平 坦面上而進行’且於經熱密封之容器本體2〇〇及蓋材3〇〇之 間形成環狀之密封部240。 (包裝谷之開封方法） 基於圖3及圖4，對如以上所述而獲得之包裝容器ι〇〇的 開封方法進行說明》 首先’握持圖3所示之密封包裝容器1〇〇的握持部31〇。 155292.doc 14 201200423 然後，握持住握持部3 10並向開封方向拉伸蓋材3〇〇，從而 於容器本體200之密封層251與鄰接層252之間進行層間剝 離。 然後，於剝離位置到達容器本體2〇〇之凸緣部23〇的内緣 部232時，如圖4所示，於密封層251之缺口部251B，密封 層25 1產生分離。繼而，自該分離位置起沿環狀之缺口部 25 1B逐漸分離出密封層25 i，從而使包裝容器【〇〇開封。 (本實施形態之作用效果） 以上所說明之本實施形態可發揮以下作用效果。 即，容器本體200沿凸緣部23〇之内緣部232而具有缺口 部251B。因此，於對凸緣部23〇上密封有蓋材3〇〇之包裝容 器1〇〇進行開封時，可於密封層251與鄰接層252之間進行 層間剝離，從而能夠於缺口部251B容易地分離密封層 251即，易開封性優異。又，開封前，凸緣部23〇之密封 層251與蓋材300密封，故密封性優異。又，如上所述根 據本實施形態，可輕易地於凸緣部23〇之内周側形成缺損 密封層25丨之缺口部251B，故可謀求降低製造成本而不花 費勞力。 進而，於密封蓋材300與容器本體2〇〇時，無需密封部 240之位置控制。即，可容易地製造兼有易開封及高密封 特性之容器。由此，可降低整體之製造成本。並且，因採 用僅提高凸緣擠壓構件520之壓力的構成，故可不必大幅 改變製造方法而容易地製造，且可穩定地實現容器本體 2〇〇之供應。 155292.doc 15 201200423 又，於容器本體200之開口部220設置有階梯部213，故 容易於凸緣部230之内周側形成密封層251之缺口部 25 1B(或者薄壁部），並且於開封時易使應力集中，從而易 開封性優異。 [第一貫施形態] 繼而’使用圖6、圖7及圖8對本發明之第二實施形態進 行說明。 圖6係表示本發明之第二實施形態之包裝容器之密閉狀 態的立體圖。圖7係圖6之VII-VII剖面圖。圖8係表示圖6之 包裝容器之一部分已開封之狀態的剖面圖。 (容器本體、蓋材及包裝容器之構成） 於第二實施形態中，除包裝容器之凸緣部的形狀不同以 外’其他構成皆與第一實施形態相同，故僅對凸緣部之形 狀進行說明。 於圖6中’包裝容器600之凸緣部260形成為套筒狀。四 緣部260包含：大致平面狀之平坦部261，其藉由密封部 240而與蓋材3〇〇密封；套筒部262，其自平坦部261之外周 緣向下方形成為套筒狀；及端緣部263，其自套筒部262之 外周緣平行於平坦部261之平面方向而延設。於平坦部 26! ’密封層251被蓋材300密封而形成密封部240。又，密 封層251沿平坦部261之内緣部261A及外緣部261B缺損而 形成環狀之缺口部251B。 平坦部261包含形成容器本體200之開口部220的最内周 緣即内緣部261A、平坦部261之最外周緣即外緣部261B、 155292.doc •16· 201200423 及位於内緣部261A與外緣部261B之中間的中央部261C。 (容器本體之製造裝置及製造方法） 針對製造第二實施形態中之包裝容器600的製造裝置， 可使用與圖5所示之第一實施形態相同之製造裝置，利用 凸緣擠壓構件520進行擠壓而形成套筒凸緣型凸緣部之平 坦部261。 (包裝容器之開封方法） 繼而’基於圖7及圖8對開封第二實施形態之包裝容器 600的方法進行說明。 首先’握持圖7所示之密封包裝容器600的握持部310。 然後’握持住握持部3 1 0並向開封方向拉伸蓋材3 〇 〇之方 向’則以平坦部261之外緣部261B的缺口部25 1B為剝離開 始位置’於容器本體200之密封層251及鄰接層252之間進 行剝離。 然後’如圖8所示，於剝離位置到達平坦部26丨之内緣部 261A時，於缺口部251B ’密封層251產生分離。繼而，自 該分離位置起，沿環狀之缺口部25 1B逐漸剝離出密封部 240 ’從而使包裝容器6〇〇開封。 如此，於第二實施形態之構成之包裝容器中，亦可發揮 與上述第一實施形態相同之作用效果。 [其他實施形態] 再者，本發明不限定於上述之實施形態，於可達成本發 明目的之範圍内的變形、改良等均包含於本發明中。 例如，於上述實施形態中，密封層251沿凸緣部23〇(平 155292.doc 17 201200423 坦部261)之内緣部232(261A)缺損而形成缺口部251b，但 亦可形成為薄壁部而代替缺口部25 1B。再者，於採用薄壁 部之情形時，可藉由使形成缺口部25 1B的凸緣擠壓構件之 壓力在上述範圍内減小’或降低凸緣擠壓之溫度而實現。 進而，於上述實施形態中，使用熱密封作為將蓋材密封 於凸緣部之方法’然而亦可使用超音波或接著劑等。 並且，於上述實施形態中，採用平面圓形狀作為包裝容 器之形狀，然而不限於此，亦可為平面矩形狀或其他形 狀。 再又’於上述實施形態中，採用於容器本體2〇〇之密封 層25 1與鄰接層252之間進行層間剝離之開封機構，然而開 封機構不限於此，可採用於容器本體之鄰接層進行凝聚剝 離之開封機構，亦可採用於容器本體之密封層與鄰接層之 間進行界面剝離之開封機構。 又，上述第二貫施形態中，採用由平坦部％ 1、套筒部 262、端緣部263呈套筒狀地形成凸緣部之構成，然而不限 於此。例如，可採用自平坦部之外緣部附近呈捲曲狀地延 設之構成，亦可僅使端緣部263呈捲曲狀地形成。如此， 可應對具有各種形狀之凸緣部的包裝容器。 [實施例] 繼而，藉由實施例及比較例更詳細地說明本發明，然而 本發明不受此等示例之任何限定。再者，各例中包裝容器 之性能（内壓強度、開封強度、開封感、製造穩定性、凸 緣部之翹曲）係採用以下方法求出。 155292.doc -18· 201200423 (i)内壓強度 使用Sun Kagaku股份有限公司製造之破裂強度測定器， 且依仏 JIS(Japanese Industrial Standard，日本工業標準）-Z〇238 所揭示之方法進行。即，於蓋材面上貼附黏著性橡膠片， 於其上插入針’並送入空氣，測定出包裝容器破裂時之數 值。再者’於包裝容器已經破裂等無法測定破裂強度之情 形時則判定為「無法測定」。 (ii) 開封強度 使用今田股份有限公司製造之數位推拉力計，與jis_ Z023 8所揭示之包裝袋用密封強度測定方法同樣地，連帶 蓋材以15 mm之寬度對密封後之容器本體進行切割，且於 相對於容器凸緣面為135。之角度測定開封側蓋材料之拉伸 強度。再者’於因拉伸強度過高而無法測定之情形時或無 法開封包裝容器之情形時判定為「無法測定」。 … (iii) 開封感 根據以下基準評估包裝容器之開封感。 A :表面層完美地缺損，開封亦良好。 然而库生缺口並 B :可確認有2 mm以内的表面層之伸長 且開封良好。 C :可確認有2 mm以内的表面層之伸長 热而產生缺口並 且開封良好。但與B相比開封性較差 D :產生2 mm以上的表面層之伸長， 受損。 『開封但易開封感 E:因表面層無缺口 或者表面層之缺口 不充分等理由導 155292.doc 201200423 致難以開封。 (iv) 製造穩定性 形成100個容器本體，並評估是否於容器本體之開口及 端緣切實地形成有密封層之缺口部。 A : 100個容器本體中，所彳容器本體之密封層上均形 缺口部。 B . 100個容器本體中，有丨個以上未於容器本體上形成密 封層之缺口部。 (v) 凸緣部之翹曲 目測評估凸緣部是否發生翹曲。 A :凸緣部未發生勉曲。 B:凸緣部存在勉曲。 [實施例1〜實施例4、及比較例1〜比較例3] (容器本體之製造） 藉由通常使用之分佈器方式共擠壓多層片材製造裝置， 製造用於容器本體之多層片材。多層片材係如以下所示之 8層之多層片材。再者，密封層與其鄰接層的熔融指數之 差（MI差）如表1所示。 1. 密封層：HDPE(高密度聚乙烯，普瑞曼聚合物股份有限 公司製造「1300J」） 2. 鄰接層1 : pp(普瑞曼聚合物股份有限公司製造「E-105 GM」） 3. 基材層1 : pp(普瑞曼聚合物股份有限公司製造「E-105 GM」） 155292.doc • 20· 201200423 4. 接著層1 :順丁烯二酸酐改質pp(三菱化學有限公司生產 「莫迪克AP P502」） 5. EVOH層：可樂麗股份有限公司製造「易包樂】」 6. 接著層2 :與鄰接層丨相同 7. 基材層2.與基材層1相同 8. 鄰接層2 :與鄰接層1相同 使用上述之多層片材，藉由柱塞助壓壓空成形而成形為 圖1所揭示之包裝容器（平坦凸緣型）。再者’作為成形模 具’係使用内周側輪廓之直徑為0 7 8 mm、外周側輪廓之 直徑為#84 mm之圓形’且為具有3 mm寬度之凸緣的杯 形。又’分別將凸緣擠壓構件之壓力及溫度以表1所揭示 之凸緣擠壓條件進行改變從而獲得容器本體。 (包裝容器之製造） 作為蓋材，使用具有以下層構成的層壓膜。並且，將上 述層壓膜之LLDPE(Linear Low Density Poly Ethyl.ene，直 鏈狀低密度聚乙烯）面，壓在所獲得之容器本體之凸緣 部’並於溫度195。(： '密封壓力150 kg/個、密封時間1.2秒 之條件下’自PET面擠壓密封條進行熱密封並接著從而獲 得包裝容器。再者，密封條形成為外周側之輪廓的直徑為 #86 mm '且内周侧之輪廓的直徑為#76 min之環狀，並在 遍及整個面上具有平坦之抵接面。 層構成：聚對苯二甲酸乙二酯（PET，厚度：12 μηι)/雙 轴延伸尼龍（ONy ’厚度：15 μιη)/直鏈狀低密度聚乙烯 (LLDPE，厚度·· 60 μηι) 155292.doc 21 201200423 / (包裝容器之評估） 以上述之方法製作以下之表1所示之實施例丨〜實施例4、 以及比較例1及比較例2之包裝容器，且對内壓強度測定、 開封部上之揭除強度測定、以及開封感、製造穩定性及凸 緣部之翹曲進行評估。所獲得之結果如表1所示。又，對 實施例1〜實施例4、以及比較例1及比較例2之包裝容器 中，谷器本體之凸緣部之厚度與成形前之多層片材之厚度 的比率（單位：％)進行測定，其結果如表丨所示。 進而，作為比較例3，以日本專利特開平7_3〇9368公報 (文獻3)所揭示之方法製造而獲得平坦凸緣型之包裝容器， 且對内壓強度測定、開封部上之揭除強度測定、開封感、 製造穩定性及凸緣部之趣曲進行評估。所獲得之結果如表 1所示。 I55292.doc 22. 201200423 【I<】 評估結果 凸緣部翹曲 < < < PQ 0Q PQ 製造穩定性 < < < < 0Q DQ 0Q 開封感： 一 ί 0Q CQ 0Q ω W < 開封強度 (kg/15 mm) 丨 1以下 1以下 1以下 1以下. 無法測定 無法測定 1.5左右 内壓強度 (MPa) 」 0.8以上 0.8以上 0.8以上 0.8以上 0.8以上 0.5左右 0.8以上 厚度 (%) σ\ 〇 1 片材材料 ..... ί MI差 (g/10 min) in 1 凸緣擠壓條件 溫度 rc) 常溫 1 壓力 (kg/cm2) Ο CN (N yn (N 1 實施例1 實施例2 實施例3 實施例4 比較例1 比較例2 比較例3 155292.doc -23- 201200423 根據表1所示之結果可確認，若使用藉由本發明之容器 本體之製造方法而獲得之容器本體（實施例丨〜實施例4)， 貝】"T製作具有穩定之易開封性及較高之密封性的包裝容 器。另一方面，可確認，比較例1〜比較例3之製造穩定性 較差’且凸緣部發生翹曲。 [實施例5〜實施例7、及比較例4〜比較例6] (容器本體及包裝容器之製造） 使用實施例1所採用之多層片材，並藉由柱塞助壓壓空 成形而成形圖6所揭示之包裝容器（套筒凸緣型）。再者，作 為成形模具，使用内周側輪廓之直徑為#78 、外周側 輪廓之直徑為多84 mm之圓形’且為具有3 mm寬度之套筒 Λ緣的杯形。又’分別將凸緣擠壓構件之壓力及溫度以表 2所揭示之凸緣播壓條件進行改變從而獲得容器本體。 然後，與實施例1同樣地，將蓋材接著於所獲得之容器 本體的凸緣部’獲得包裝容器。再者，密封層與其鄰接層 的熔融指數之差（ΜΙ差）如表2所示。 (包裝容器之評估） 以上述之方法製作如以下之表2所示之實施例5〜實施例 7、以及比較例4及比較例5之包裝容器，且對内壓強度測 定、開封部上之揭除強度測定、以及開封感、製造穩定性 及凸緣部之翹曲進行評估。所獲得之結果如表2所示。 又’對貫施例5〜實施例7、以及比較例4及比較例5之包裝 谷器中’容器本體之平坦部之厚度與成形前之多層片材之 厚度的比率（單位：％)進行測定，其結果如表2所示。 155292.doc • 24- 201200423 進而，作為比較例6，以日本專利特開平7_3〇9368公報 (文獻3)所揭示之方法製造而獲得套筒凸緣型之包裝容器， 且對内壓強度測定、開封部上之揭除強度測定、開封感、 製造穩定性及凸緣部之翹曲進行評估。所獲得之結果如表 2所示。 155292.doc •25· 201200423Therefore, the thickness of the material 枓 sheet (multilayer sheet 250) of the wire body y u with respect to the container body 200 is 20% or more and 950 / 〇 or less. Furthermore, the archaeological ^ ^ ' thought to effect the thinning or notching of the sealing layer 2 5 1 , then Λ Α π. Λ λ The upper limit of the thickness of the flange portion 230 is preferably 30 〇 / 〇 or less, and more preferably 5% or less. In the case where the thickness is less than the above lower limit of 2%, it is difficult to form the container body, and on the other hand, when the above upper limit is more than 95%, there is a miscellaneous 7--the clam is difficult to make the sealing layer 251 thin. It is difficult to open the wall because it is walled or notched. (Manufacturing Method of Packaging Container) Next, a method of manufacturing the packaging container 100 of the form of the __眚·% You# > a # a ^ will be described. First, a liquid as the content P is injected and filled in the container body 200 obtained as described above. Then, the lid member 300 is placed on the flange portion 23 of the container body 200 and heat-sealed. The strength of the heat seal is stronger than that of the sealing layer 251 of the multilayer sheet 25 and the adjacent layer 252. The adhesive strength of the heat seal can be appropriately adjusted by heat sealing conditions such as temperature, pressure, time, thickness of each layer, resin selection, and the like. The heat is sealed and the sealing strip is pressed onto the flat surface of the flange portion 230 to form a ring shape between the heat-sealed container body 2〇〇 and the lid member 3〇〇. Sealing portion 240. (Unpacking Method of Packaging Valley) Based on FIG. 3 and FIG. 4, the unsealing method of the packaging container ι obtained as described above will be described. First, the grip of the sealed packaging container shown in FIG. Hold the department 31〇. 155292.doc 14 201200423 Then, the grip portion 3 10 is gripped and the lid member 3 is stretched in the unsealing direction, thereby performing interlayer peeling between the seal layer 251 of the container body 200 and the adjacent layer 252. Then, when the peeling position reaches the inner edge portion 232 of the flange portion 23A of the container body 2, as shown in Fig. 4, the sealing layer 25 1 is separated at the notch portion 251B of the sealing layer 251. Then, from the separation position, the sealing layer 25 i is gradually separated along the annular notch portion 25 1B, thereby causing the packaging container to be opened. (Effects and Effects of the Present Embodiment) The present embodiment described above can exhibit the following operational effects. That is, the container body 200 has a notch portion 251B along the inner edge portion 232 of the flange portion 23A. Therefore, when the packaging container 1 that seals the lid member 3〇〇 on the flange portion 23 is opened, the interlayer detachment between the sealing layer 251 and the adjacent layer 252 can be easily separated from the notch portion 251B. The sealing layer 251 is excellent in easy-opening property. Further, before the opening, the sealing layer 251 of the flange portion 23 is sealed with the lid member 300, so that the sealing property is excellent. Further, according to the present embodiment, the notch portion 251B of the defect seal layer 25A can be easily formed on the inner peripheral side of the flange portion 23, so that the manufacturing cost can be reduced without labor. Further, when the lid member 300 is sealed from the container body 2, the positional control of the sealing portion 240 is not required. Namely, it is possible to easily manufacture a container having both easy opening and high sealing properties. Thereby, the overall manufacturing cost can be reduced. Further, since the pressure is increased only by the pressure of the flange pressing member 520, it is possible to easily manufacture without significantly changing the manufacturing method, and the supply of the container body 2 can be stably achieved. 155292.doc 15 201200423 Further, since the step portion 213 is provided in the opening portion 220 of the container body 200, the notch portion 25 1B (or the thin portion) of the sealing layer 251 is easily formed on the inner peripheral side of the flange portion 230, and It is easy to concentrate stress when opening, and it is easy to open. [First embodiment] Next, a second embodiment of the present invention will be described with reference to Figs. 6, 7, and 8. Fig. 6 is a perspective view showing the sealed state of the packaging container according to the second embodiment of the present invention. Figure 7 is a cross-sectional view taken along line VII-VII of Figure 6. Fig. 8 is a cross-sectional view showing a state in which a part of the packaging container of Fig. 6 has been opened. (Construction of Container Body, Cover Material, and Packaging Container) In the second embodiment, the shape of the flange portion of the packaging container is different from that of the first embodiment. Therefore, only the shape of the flange portion is performed. Description. In Fig. 6, the flange portion 260 of the packaging container 600 is formed in a sleeve shape. The four-edge portion 260 includes a substantially planar flat portion 261 which is sealed to the lid member 3 by the sealing portion 240; the sleeve portion 262 is square-shaped from the outer periphery of the flat portion 261 into a sleeve shape; And the end edge portion 263 is extended from the outer peripheral edge of the sleeve portion 262 in parallel with the planar direction of the flat portion 261. The sealing portion 251 is sealed by the lid member 300 at the flat portion 26!' to form the sealing portion 240. Further, the sealing layer 251 is formed along the inner edge portion 261A and the outer edge portion 261B of the flat portion 261 to form an annular notch portion 251B. The flat portion 261 includes an inner edge portion 261A which is the innermost periphery of the opening portion 220 of the container body 200, and an outer edge portion 261B, 155292.doc •16·201200423 which is the outermost periphery of the flat portion 261, and the inner edge portion 261A and the outer portion. The central portion 261C in the middle of the edge portion 261B. (Manufacturing Apparatus and Manufacturing Method of Container Body) The manufacturing apparatus of the packaging container 600 according to the second embodiment can be manufactured by the flange pressing member 520 using the same manufacturing apparatus as that of the first embodiment shown in FIG. The flat portion 261 of the sleeve flange type flange portion is formed by pressing. (Unpacking Method of Packaging Container) Next, a method of unsealing the packaging container 600 of the second embodiment will be described based on Figs. 7 and 8 . First, the grip portion 310 of the sealed packaging container 600 shown in Fig. 7 is held. Then, 'the grip portion 310 is gripped and the direction of the lid member 3 is stretched in the unsealing direction', and the notch portion 25 1B of the outer edge portion 261B of the flat portion 261 is the peeling start position 'in the container body 200 Peeling is performed between the sealing layer 251 and the adjacent layer 252. Then, as shown in Fig. 8, when the peeling position reaches the inner edge portion 261A of the flat portion 26, the sealing layer 251 is separated from the notch portion 251B'. Then, from the separated position, the sealing portion 240' is gradually peeled off along the annular notch portion 25 1B to open the packaging container 6 . As described above, in the packaging container having the configuration of the second embodiment, the same operational effects as those of the first embodiment described above can be exhibited. [Other Embodiments] The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope of the purpose of the invention are included in the present invention. For example, in the above embodiment, the sealing layer 251 is formed with a notch portion 251b along the inner edge portion 232 (261A) of the flange portion 23 (flat 155292.doc 17 201200423 tang portion 261), but may be formed as a thin wall. Instead of the notch portion 25 1B. Further, in the case where the thin portion is used, it can be achieved by reducing the pressure of the flange pressing member forming the notch portion 25 1B within the above range or reducing the temperature at which the flange is pressed. Further, in the above embodiment, heat sealing is used as a method of sealing the lid member to the flange portion. However, ultrasonic waves, an adhesive or the like may be used. Further, in the above embodiment, the planar circular shape is used as the shape of the packaging container. However, the present invention is not limited thereto, and may be a flat rectangular shape or another shape. Further, in the above embodiment, the unsealing mechanism for performing the interlayer peeling between the sealing layer 25 1 of the container body 2 and the adjacent layer 252 is used. However, the unsealing mechanism is not limited thereto, and may be applied to the adjacent layer of the container body. The unsealing and unsealing mechanism can also be used as an unsealing mechanism for interfacial peeling between the sealing layer of the container body and the adjacent layer. Further, in the second embodiment, the flange portion is formed in a sleeve shape by the flat portion %1, the sleeve portion 262, and the end edge portion 263. However, the flange portion is not limited thereto. For example, it may be configured to be formed in a curled shape from the vicinity of the outer edge portion of the flat portion, or only the end edge portion 263 may be formed in a curled shape. In this way, it is possible to cope with a packaging container having flange portions of various shapes. [Examples] Hereinafter, the present invention will be described in more detail by way of Examples and Comparative Examples. However, the present invention is not limited by the examples. Further, the properties (internal compressive strength, unsealing strength, unsealing feeling, manufacturing stability, and warpage of the flange portion) of the packaging container in each of the examples were determined by the following methods. 155292.doc -18·201200423 (i) Internal pressure strength The burst strength tester manufactured by Sun Kagaku Co., Ltd. was used, and it was carried out in accordance with the method disclosed in JIS (Japanese Industrial Standard)-Z〇238. Namely, an adhesive rubber sheet was attached to the surface of the cover material, a needle was inserted thereon, and air was supplied thereto, and the value at the time of breakage of the packaging container was measured. Furthermore, it is judged as "unable to measure" when the packaging container has been broken or the like, and the breaking strength cannot be measured. (ii) The opening strength is measured by the digital force gauge manufactured by Ida Co., Ltd., and the sealed container body is cut with a width of 15 mm in the same manner as the sealing strength measurement method of the package disclosed in jis_Z023 8. And at 135 with respect to the flange face of the container. The tensile strength of the unsealed side cover material is determined from the angle. Further, it was judged as "unable to measure" when the tensile strength was too high to be measured or when the packaging container could not be opened. ... (iii) Opening feeling The opening feeling of the packaging container was evaluated based on the following criteria. A: The surface layer is perfectly damaged, and the opening is also good. However, there is a gap in the reservoir and B: it can be confirmed that the surface layer is within 2 mm and the opening is good. C : It was confirmed that the surface layer within 2 mm had an elongation heat and a notch was formed and the opening was good. However, compared with B, the opening property is poor. D: The elongation of the surface layer of 2 mm or more is generated and damaged. 『Opening but easy to open the seal E: Because there is no gap in the surface layer or the gap in the surface layer is not sufficient, etc. 155292.doc 201200423 It is difficult to open the seal. (iv) Manufacturing stability 100 container bodies were formed, and it was evaluated whether or not the notch portion of the sealing layer was reliably formed at the opening and the edge of the container body. A : In the 100 container bodies, the sealing layer of the container body is uniformly formed with a notch portion. B. Among the 100 container bodies, there are more than one notch portion which does not form a sealing layer on the container body. (v) Warpage of the flange portion Visually evaluate whether the flange portion is warped. A: The flange portion is not distorted. B: The flange portion is distorted. [Example 1 to Example 4, and Comparative Example 1 to Comparative Example 3] (Production of Container Body) A multilayer sheet manufacturing apparatus for a container body was produced by co-extruding a multilayer sheet manufacturing apparatus by a generally used distributor method . The multilayer sheet is an 8-layer multilayer sheet as shown below. Further, the difference in the melt index (MI difference) between the sealing layer and the adjacent layer is shown in Table 1. 1. Sealing layer: HDPE (High Density Polyethylene, "1300J" manufactured by Prehman Polymer Co., Ltd.) 2. Adjacent layer 1: pp ("E-105 GM" manufactured by Prehman Polymer Co., Ltd.) 3 Substrate layer 1: pp ("E-105 GM" manufactured by Prehman Polymer Co., Ltd.) 155292.doc • 20· 201200423 4. Next layer 1: Maleic anhydride modified pp (Mitsubishi Chemical Co., Ltd.) Production of "Modic AP P502") 5. EVOH layer: "Easy Pack" made by Kuraray Co., Ltd. 6. Next layer 2: same as adjacent layer 7. Substrate layer 2. Same as substrate layer 1 8 Adjacent layer 2: The above-mentioned multilayer sheet is used in the same manner as the adjacent layer 1, and is formed into a packaging container (flat flange type) disclosed in Fig. 1 by plunger pressure forming. Further, 'as a forming mold' is a cup shape having a diameter of 0 7 8 mm on the inner circumference side profile and a diameter of 84 mm on the outer circumference side profile, and a cup shape having a flange having a width of 3 mm. Further, the pressure and temperature of the flange pressing member were respectively changed in the flange pressing conditions disclosed in Table 1 to obtain the container body. (Manufacturing of Packaging Container) As the lid member, a laminate film having the following layer constitution was used. Further, the surface of the LLDPE (Linear Low Density Poly Ethyl. ene) of the above laminated film was pressed against the flange portion of the obtained container body at a temperature of 195. (: 'The sealing pressure is 150 kg/piece, and the sealing time is 1.2 seconds.' The heat sealing is performed from the PET surface extrusion sealing strip and then the packaging container is obtained. Further, the sealing strip is formed to have a diameter of the outer peripheral side of the contour # The 86 mm 'and inner contour side has a ring shape of #76 min in diameter and has a flat abutment surface throughout the entire surface. Layer composition: polyethylene terephthalate (PET, thickness: 12 μηι ) / biaxially stretched nylon (ONy 'thickness: 15 μιη) / linear low density polyethylene (LLDPE, thickness · 60 μηι) 155292.doc 21 201200423 / (Evaluation of packaging container) The following method was used to make the following The packaging container of Example 1 to Example 4, and Comparative Example 1 and Comparative Example 2 shown in Table 1, and the measurement of the internal pressure strength, the measurement of the peeling strength on the unsealing portion, the opening feeling, the manufacturing stability, and the convexity The warpage of the edge was evaluated. The results obtained are shown in Table 1. Further, in the packaging containers of Examples 1 to 4, and Comparative Example 1 and Comparative Example 2, the flange portion of the bar body was The ratio of the thickness to the thickness of the multilayer sheet before forming ( In the case of the measurement, the results are as shown in Table 。. Further, as a comparative example 3, a flat flange type packaging container is obtained by the method disclosed in Japanese Laid-Open Patent Publication No. Hei 7-3-9368 (Document 3). The internal pressure strength measurement, the peeling strength measurement on the unsealing portion, the opening feeling, the manufacturing stability, and the fun of the flange portion were evaluated. The results obtained are shown in Table 1. I55292.doc 22. 201200423 [I< ;] Evaluation result Flange warping <<<<< PQ 0Q PQ Manufacturing stability <<<< 0Q DQ 0Q Opening feeling: One ί 0Q CQ 0Q ω W < Opening strength (kg/15 Mm) 丨1 or less 1 or less 1 or less 1 or less. Unable to measure 1.5 internal pressure strength (MPa) cannot be measured. 0.8 or more 0.8 or more 0.8 or more 0.8 or more 0.8 or more 0.5 or more 0.8 or more thickness (%) σ\ 〇1 Sheet material ..... ί MI difference (g/10 min) in 1 Flange extrusion condition temperature rc) Normal temperature 1 Pressure (kg/cm2) Ο CN (N yn (N 1 Example 1 Example 2 Example 3 implementation Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 155292.doc -23- 201200423 Root As a result of the results shown in Table 1, it was confirmed that the container body (Example 丨 to Example 4) obtained by the method for producing a container body of the present invention has a stable easy-opening property and a high degree. Sealed packaging container. On the other hand, it was confirmed that the comparative examples 1 to 3 had poor manufacturing stability and the flange portion was warped. [Example 5 to Example 7, and Comparative Example 4 to Comparative Example 6] (Manufacture of container body and packaging container) The multilayer sheet used in Example 1 was used and formed by plunger pressure-pressure forming. The packaging container (sleeve flange type) disclosed in Fig. 6. Further, as the forming mold, a cup having an inner circumference side profile of #78 and a peripheral side profile having a diameter of 84 mm and having a sleeve edge of 3 mm width was used. Further, the pressure and temperature of the flange pressing member were respectively changed in the flange weaving conditions disclosed in Table 2 to obtain the container body. Then, in the same manner as in the first embodiment, the lid member was obtained by following the flange portion of the obtained container body. Further, the difference in the melt index of the sealing layer from the adjacent layer (ΜΙ difference) is shown in Table 2. (Evaluation of packaging container) The packaging containers of Examples 5 to 7 and Comparative Example 4 and Comparative Example 5 shown in Table 2 below were prepared by the above method, and the internal pressure strength was measured and the opening portion was opened. The strength measurement, the opening feeling, the manufacturing stability, and the warpage of the flange portion were evaluated. The results obtained are shown in Table 2. Further, the ratio of the thickness of the flat portion of the container body to the thickness of the multilayer sheet before molding (unit: %) in the package of Example 5 to Example 7 and Comparative Example 4 and Comparative Example 5 was carried out. The results are shown in Table 2. 155292.doc • 24-201200423 Further, as a comparative example 6, a sleeve flange type packaging container was produced by the method disclosed in Japanese Laid-Open Patent Publication No. Hei 7-3/9368 (Document 3), and the internal pressure strength was measured. The uncovering strength measurement, the opening feeling, the manufacturing stability, and the warpage of the flange portion on the unsealing portion were evaluated. The results obtained are shown in Table 2. 155292.doc •25· 201200423
【ίι——I 評估結果 凸緣部翹曲 < C < < < DQ ! 製造穩定性 < C < PQ PQ 開封感 PQ Q ω < 開封強度 (kg/15 mm) 1以下 j 1以下 1以下 無法測定 無法測定 1.5左右 内壓強度 (MPa) 0.8以上 0·8以上 0.8以上 0.8以上 0.5左右 __1 0.8以上 厚度 (%) in 00 Os 00 1 片材材料 MI差 (g/10 min) in 1 凸緣擠壓條件 溫度 ro 常溫 常溫 常溫 1 壓力 (kg/cm2) ο 3 ON 00 1 實施例5 實施例6 實施例7 比較例4 比較例5 比較例6 ·26· 155292.doc 201200423 根據表2所示之結果可確認，若使用藉由本發明之容器 本體之製造方法而獲得之容器本體（實施例5〜實施例7)， 則可製作具有穩定之易開封性及較高之密封性的包裝容 器。另一方面，可確認，比較例4及比較例5中製造穩定性 較差’並且比較例6中製造穩定性較差且凸緣部存在翹 曲0 [實施例8〜實施例11] (容器本體及包裝容器之製造） 除了分別將凸緣擠壓構件之壓力及溫度以表3所揭示之 凸緣擠壓條件進行改變而製作容器本體以外，其他皆與實 施例2同樣地獲得容器本體及包裝容器。再者，密封層與 其鄰接層的熔融指數之差（MI差）如表3所示。 (包裝容器之評估） 以上述之方法製作如以下之表3所示之實施例8〜實施例 11的包裝容器，且對内壓強度測定、開封部上之揭除強度 測疋、以及開封感、製造穩定性及凸緣部之翹曲進行評 估。所獲得之結果如表3所示。又，對實施例8〜實施例11 之包裝容器中的'容器本體之凸緣部之厚度與成形前之多 層片材之厚度的比率（單位：％)進行測定，其結果如表3所 示。 155292.doc -27- 201200423 【εί 評估結果 凸緣部翹曲 < < < < 製造穩定性 < < < < 開封感 CQ < < PQ 開封強度 (kg/15 mm) 1以下 1以下 1以下 1以下 内壓強度 (MPa) 0.8以上 0.8以上 0.8以上 0.8以上 厚度 (%) § 片材材料 1 MI差 (g/10 min) in 凸緣擠壓條件 溫度 (°C) ο 〇 壓力 (kg/cm2) 實施例8 實施例9 實施例10 實施例11 155292.doc -28 201200423 根據表3所不之結果可4認，凸緣擠壓構件之溫度較佳 為i〇°c以上160。(：以下之範圍，且5(rc以上i〇〇t：以下之範 圍中之開封感更佳。 [實施例12〜實施例14] (容器本體及包裝容器之製造） 作為多層片材之密封層及其鄰接層之材料，使用以下之 材料且改變密封層與其鄰接層的炫融指數之差_差），除 此以2，與實施例2同樣地獲得容器本體及包裝容器◊再 者，密封層與其鄰接層的熔融指數之差（mi差）如表4所 7f> 〇 、ί層之材料.hdpe(南密度聚乙烯，普瑞曼聚合物股 份有限公司製造「13術」）或者pp(普瑞曼聚合物股份有限 公司製造「J3021GR」） 「鄰接層之材料· pp(普瑞曼聚合物股份有限公司製造 「 GM」）或者PP(普瑞曼聚合物股份有限公司製造 「 5 〇Μ」）/pE(曰本聚乙烯股份有限公司製造 HE3〇J )混合材料（調配比5:5) (包裝容器之評估） 、述之方法製作如以下之表4所示之實施例丨2〜實施例 1::包裝容器’且對内壓強度測定、開封部上之揭除強度 、 、及開封感、製造穩定性及凸緣部之輕曲進行評 ^所獲得之結果如表4所示。又，對實施例12〜實施例14 之包裝容器中的、容器本體之凸緣部之厚度與成形前之多 層片材之厚度的比率（單位：％)進行測定，且其結果如表4 所示。 155292.doc •29· 201200423 評估結果 i_ 凸緣部翹曲 < < < 製造穩定性 < < C 開封感 CQ CQ 〇 開封強度 (kg/15 mm) 1以下 1以下 1以下 内壓強度 (MPa) 0.8以上 0.8以上 0.8以上 1 厚度 (%) 片材材料 MI差 (g/10 min) m 凸緣擠壓條件 溫度 (°C) 常溫 常溫 常溫 壓力 (kg/cm2) yn 實施例12 實施例13 實施例14 •30 155292.doc 201200423 根據表4所示之結果可確認’密封層與其鄰接層的熔融 才曰數之差（Ml差）為3 g/10 min以上時，開封感較為良好。 【圖式簡單說明】 圖1表示本發明之第一實施形態之包裝容器的密閉狀態 之立體圖。 圖2係表示本發明之第一實施形態之包裝容器的一部分 已開封之狀態之立體圖。 圖3係圖丄之^^^剖面圖。 圖4係圖2之IV-IV剖面圖。 圖5係表示本發明之第一實施形態之包裝本體的製造裝 置之概要之一部分的剖面圖。 圖6係表示本發明之第二實施形態之包裝容器之密閉狀 態的立體圖。 圖7係圖6之VII-VII剖面圖。 圖8係表示圖6之包裝容器的一部分已開封之狀態之剖面 圖。 【主要元件符號說明】 100 包裝容器 200 容器本體 210 凹部 211 底部 212 壁部 213 階梯部 220 開口部 230、260 凸緣部 155292.doc 201200423 231、 261Β 外緣部 232 ' 261Α 内緣部 240 密封部 250 多層片材 251 密封層 251Α 密封面 251Β 缺口部 252 鄰接層 253 基材層 261 平坦部 261C 中央部 262 套筒部 263 端緣部 300 蓋材 310 握持部 500 容器本體成形裝置 510 模具 511 模具凹部 512 平面部 520 凸緣擠壓部件 521 擠壓面 530 柱塞 540 彈簧 600 包裝容器 Ρ 内容物 ·32· 155292.doc[ίι——I Evaluation result Flange warpage < C <<< DQ ! Manufacturing stability < C < PQ PQ Unsealing feeling PQ Q ω < Unsealing strength (kg/15 mm) 1 or less j 1 or less 1 or less cannot be measured. The internal pressure strength (MPa) of about 1.5 is not measured. 0.8 or more, 0.8 or more, 0.8 or more, 0.8 or more, 0.5 or so, __1 0.8 or more thickness (%) in 00 Os 00 1 Sheet material MI difference (g/ 10 min) in 1 Flange extrusion condition temperature ro Normal temperature Normal temperature Normal temperature 1 Pressure (kg/cm2) ο 3 ON 00 1 Example 5 Example 6 Example 7 Comparative Example 4 Comparative Example 5 Comparative Example 6 · 26· 155292. Doc 201200423 According to the results shown in Table 2, it can be confirmed that if the container body (Examples 5 to 7) obtained by the method for producing a container body of the present invention is used, it is possible to produce a stable easy-opening property and a high degree. Sealed packaging container. On the other hand, it was confirmed that the production stability was poor in Comparative Example 4 and Comparative Example 5, and the manufacturing stability was poor in Comparative Example 6 and the flange portion was warped. [Example 8 to Example 11] (Container body and Manufacture of packaging container) The container body and the packaging container were obtained in the same manner as in Example 2 except that the pressure and temperature of the flange pressing member were changed by the flange extrusion conditions disclosed in Table 3, respectively. . Further, the difference in the melt index (MI difference) between the sealing layer and the adjacent layer is shown in Table 3. (Evaluation of Packaging Container) The packaging containers of Examples 8 to 11 shown in Table 3 below were prepared by the above method, and the internal pressure strength was measured, the peeling strength on the unsealing portion was measured, and the feeling of opening was sealed. , manufacturing stability and warpage of the flange portion were evaluated. The results obtained are shown in Table 3. Further, the ratio (unit: %) of the thickness of the flange portion of the container body to the thickness of the multilayer sheet before molding in the packaging containers of Examples 8 to 11 was measured, and the results are shown in Table 3. . 155292.doc -27- 201200423 [εί Evaluation result Flange warping <<<< Manufacturing stability <<<< Opening feeling CQ << PQ opening strength (kg/15 mm 1) 1 or less 1 or less 1 or less Internal compressive strength (MPa) 0.8 or more 0.8 or more 0.8 or more 0.8 or more Thickness (%) § Sheet material 1 MI difference (g/10 min) in Flange extrusion condition temperature (°C ο 〇 pressure (kg/cm2) Example 8 Example 9 Example 10 Example 11 155292.doc -28 201200423 According to the results of Table 3, the temperature of the flange pressing member is preferably i〇 Above cc 160. (: the following range, and 5 (rc or more i〇〇t: the opening feeling in the following range is more preferable. [Example 12 to Example 14] (Manufacture of container body and packaging container) Sealing as a multilayer sheet The material of the layer and its adjacent layer is the same as the material and the difference between the sealing layer and the adjacent layer is changed, and the container body and the packaging container are obtained in the same manner as in the second embodiment. The difference in melt index between the sealing layer and its adjacent layer (mi difference) is as shown in Table 4, 7f> 〇, ί layer material. hdpe (South Density Polyethylene, manufactured by Prehman Polymer Co., Ltd. "13") or pp ("J3021GR" manufactured by Prehman Polymer Co., Ltd.) "Material of adjacent layer · pp ("GM" manufactured by Prehman Polymer Co., Ltd.) or PP (manufactured by Prehman Polymer Co., Ltd.) 5 〇 Μ") / pE (HE3〇J manufactured by Sakamoto Polyethylene Co., Ltd.) Mixed material (mixing ratio 5:5) (Evaluation of packaging container), method described in Example 4 as shown in Table 4 below ~Example 1:: Packaging container 'and internal pressure strength measurement The results of the uncovering strength on the unsealing portion, the unsealing feeling, the manufacturing stability, and the softness of the flange portion were evaluated as shown in Table 4. Further, the packaging containers of Examples 12 to 14 The ratio of the thickness of the flange portion of the container body to the thickness of the multilayer sheet before molding (unit: %) was measured, and the results are shown in Table 4. 155292.doc •29·201200423 Evaluation result i_ convex Edge warping <<<<<<<<<< C Opening sensation CQ CQ 〇 Opening strength (kg / 15 mm) 1 or less 1 or less 1 or less Internal pressure strength (MPa) 0.8 or more 0.8 or more 0.8 or more 1 Thickness (%) Sheet material MI difference (g/10 min) m Flange extrusion condition temperature (°C) Normal temperature normal temperature Normal temperature pressure (kg/cm2) yn Example 12 Example 13 Example 14 • 30 155292.doc According to the results shown in Table 4, it can be confirmed that when the difference between the number of meltings of the sealing layer and the adjacent layer (Ml difference) is 3 g/10 min or more, the opening feeling is good. [Simplified illustration] FIG. The sealed state of the packaging container according to the first embodiment of the present invention Fig. 2 is a perspective view showing a state in which a part of the packaging container according to the first embodiment of the present invention is opened. Fig. 3 is a sectional view of Fig. 2, and Fig. 4 is a sectional view taken along line IV-IV of Fig. 2. Fig. 5 is a cross-sectional view showing a part of the apparatus for manufacturing a package body according to the first embodiment of the present invention. Fig. 6 is a perspective view showing a sealed state of the packaging container according to the second embodiment of the present invention. Figure 7 is a cross-sectional view taken along line VII-VII of Figure 6. Figure 8 is a cross-sectional view showing a state in which a part of the packaging container of Figure 6 has been opened. [Description of main components] 100 Packaging container 200 Container body 210 Concavity 211 Bottom portion 212 Wall portion 213 Step portion 220 Opening portion 230, 260 Flange portion 155292.doc 201200423 231, 261 Β Outer edge portion 232 ' 261 Α Inner edge portion 240 Sealing portion 250 Multilayer sheet 251 Sealing layer 251 密封 Sealing surface 251 缺口 Notch 252 Adjacent layer 253 Substrate layer 261 Flat portion 261C Central portion 262 Sleeve portion 263 End edge portion 300 Cover material 310 Grip portion 500 Container body forming device 510 Mold 511 Mold Concave portion 512 Plane portion 520 Flange pressing member 521 Extrusion surface 530 Plunger 540 Spring 600 Packaging container Ρ Content·32· 155292.doc