201139225 六、發明說明： 【發明所屬之技術領域】 本發明係關於-種易開封性容器及其製造方法，更詳細 而言，本發明係關於-種可較佳用於食品類等之容器之易 開封性容器及其製造方法。_ 【先前技術】 作為食品類之包裝形態，廣泛使时__種將食品類收納 於在開口部周緣設有凸緣部之容器本體之内部後，將該容 器本體之凸緣部與薄膜狀之蓋材熱封而密封包裝之附蓋容 器。 於此種附蓋容器中，就安全保存收納於容器内部之食品 類之觀點而言，要求較高之密封性。又，就開封蓋材時可 簡便地自容器本體剝離蓋材之觀點而言，亦要求易開封 性。 作為此種附蓋容器，例如提出有於容器本體之凸緣部之 内周側及外周側形成樹脂積存部者（參照文獻i :日本專利 特開平1-213171號公報及文獻2:日本專利特開平2_67125 號公報）、於容器本體之凸緣部之内周側形成樹脂積存部 者（參照文獻3 :日本專利特開2005-271972號公報及文獻 4 :日本專利特開2006-206128號公報）、及於容器本體之凸 緣部之内周側及外周側形成樹脂積存部並將外周側之樹脂 積存部壓扁而成者（參照文獻5 :日本專利特開平2-219766 號公報及文獻6 :日本專利特開平2-219767號公報）。 然而’即便係文獻1及文獻2所記載之附蓋容器，受到外 154804.doc 201139225 周側之樹脂積存部之影響，其易開封性仍不充分。又，於 文獻1及文獻2所s己載之附蓋容器中’由於密封強度存在不 均’因此亦有於多列系之密封設備中無法穩定生產之問 題。又，於文獻3及文獻4所記載之附蓋容器中，由於密封 強度存在不均故有於多列系之密封設備中無法穩定生產之 問題。進而，即便係文獻5及文獻6所記載之附蓋容器，受 到外周側之樹脂積存部被壓扁之影響，其易開封性仍不充 分。 【發明内容】 因此，本發明之目的在於提供一種可充分抑制開封時之 毛鬚之產生及在、封強度之不均，並且同時具有高密封性及 易開封性之易開封性容器及其製造方法。 為解決上述課題，本發明提供一種如下之易開封性容器 及其製造方法。 即，本發明係一種易開封性容器，其特徵在於具備：容 器本體包含至少具有表面層與表面下層之積層體，且 於開口部之周緣具有凸緣部；及蓋材，其至少具有可與上 述表面層黏著之密封層；將上述凸緣部之上述表面層與上 述蓋材之上述密封層呈環狀地熱封，使上述容器本體與上 述蓋材之㈣部中之至少—者界面義或凝聚破壞，藉此 將蓋材開封，且於上述凸緣部上之上述密封部之内周側， 以滿足下述數式(F1)所表示之條件之方式，形成有包含上 述容器本體之表面層、上述表面下層及上述蓋材之上述密 封層之構成樹脂之瘤狀樹脂積存部。 154804.doc 201139225 0.25^ A/B^ 1.2 ··· (FI) (數式（FI)中，A表示於上述樹脂積存部中，自上述凸緣部 之上述表面下層之表面至上述密封層之表面為止的高度尺 寸，B表示於上述樹脂積存部中，自上述樹脂積存部中之 上述表面下層之根部至上述樹脂積存部中之上述表面下層 之最内側到達點為止的寬度尺寸）。 於本發明之易開封性容器令，藉由使上述容器本體之表 面層凝聚破壞而可開封上述蓋材，並且上述容器本體之表 面層較佳為由含有聚丙烯系樹脂及乙烯_丙烯酸酯_順丁烯 二酸肝共聚物之樹脂組合物而形成。 於本發明之易開封性容器中，藉由使上述容器本體之表 面層凝聚破壞而可開封上述蓋材，且上述容器本體之表面 層較佳為由含有聚丙烯系樹脂、聚乙烯系樹脂及苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物之樹脂組合物而形成。 於本發明之易開封性容器中，藉由使上述容器本體之表 面層凝聚破壞而可開封上述蓋材，且上述容器本體之表面 層較佳為由含有聚丙烯系樹脂、低密度聚乙烯系樹脂及茂 金屬系聚丙稀系樹脂之樹脂組合物而形成。 本發明之易開封性容器之製造方法，該易開封性容器具 備·容器本體，其包含至少具有表面層與表面下層之積層 體，且於開口部之周緣具有凸緣部；及蓋材，其至少具有 可與上述表面層黏著之密封層；將上述凸緣部之上述表面 層與上述蓋材之上述密封層呈環狀地熱封，使上述容器本 體與上述蓋材之密封部中之至少一者界面剝離或凝聚破 154804.doc 201139225 壞，藉此可冑蓋材_，該製造方法之特徵在於’於上述 凸緣部上之上述密封部之内周側，以滿足下述數式（fi)所 表不之條件之方式，形成包含上述容器本體之表面層、上 述表面下層及上述蓋材之上述密封層之構成樹脂之瘤狀樹 脂積存部。 0.25^A/B^ 1.2 ... (pi) (數式（F1)中，A表示於上述樹脂積存部中，自上述凸緣部 之上述表面下層之表面至上述密封層之表面為止的高度尺 寸，B表示於上述樹脂積存部中，自上述樹脂積存部中之 上述表面下層之根部至上述樹脂積存部中之上述表面下層 之最内側到達點為止的寬度尺寸）。 /於本發明之易開封性容器之製造方法中，較佳為藉由進 行如下之第1熱封步驟而形成上述樹脂積存部：使用於内 周緣進行R加工而形成有剖面為曲線狀之曲面部，且於外 周緣自上述内周緣朝向上方形成有錐形之環狀密封盤，自 重疊於上述容器本體之凸緣部上表面之上述蓋材之上方進 行按壓。 /此種情形時，較佳為藉由進行如下之第2熱封步驟而 形成上述樹脂積存部··於上述第】熱封步驟之後，進而使 用具有平坦之密封面之環狀密封盤或具有曲面狀之密封面 之環狀密封盤’自重疊於上述容器本體之凸緣部上表面之 上述蓋材之上方進行按堅。 根據本發明，可提供-種能夠充分抑制密封強度之不 均’並且同時具有高密封性及易開封性之易開封性容器及 154804.doc 201139225 其製造方法。 【實施方式】 以下，基於圖式對本發明之實施形態進行說明。 [第1實施形態] (易開封性容器1之構成） 圖1A及圖1B係表示本發明之易開封性容器i之一態樣之 概略圖’圖1A係表示由蓋材3密封之狀態，圖18係表示自 開封起始部4開封蓋材3之狀態。又，圖2係表示圖1A及圓 1B之開封起始部4附近之部分剖面圖。 易開封性容器1具備容器本體2及薄膜狀之蓋材容器 本體2係相對於開口部24而載置蓋材3，將配設於容器本體 2之開口部24之周緣之凸緣部25與蓋材3熱封，形成有環狀 密封部26(由下述第丨環狀密封盤7及第2環狀密封盤8所形 成之密封部262以及由下述第2環狀密封盤8所形成之密封 部261) ’如圖1A所示，易開封性容器1之内部成為密封狀 態。 另一方面’如圖1B所示，當開封密封狀態之易開封性容 器1時’只要在設置於易開封性容器1之邊角之開封起始部 4將蓋材3朝上部（圖1B之箭頭方向）提拉便可簡便地開封易 開封性容器1。 (容器本體2之構成） 圖2所示’各器本體2係包含表面層21、表面下層22及 基材層23之3層之積層體。又，容器本體2為具有特定深度 之大致長方形之托盤形狀，且具有大致長方形狀之開口部 154804.doc 201139225 24 ’於開口部24之周緣以朝外側突出之方式配設有凸緣部 25 〇 此處’於本實施形態中’係藉由使容器本體2之表面層 2 1凝聚破壞之凝聚剝離而開封。若使用此種凝聚剝離，則 於開封時不會產生毛鬚而導致外觀不良之方面較佳。 作為表面層21之構成材料，就凝聚破壞之容易程度及熱 封性之觀點而言’較佳為使用含有聚丙稀系樹脂及乙烯_ 丙烯酸酯·順丁烯二酸酐共聚物之樹脂組合物，含有聚丙 烯系樹脂、聚乙稀系樹脂及苯乙烯-乙烯-丁烯_笨乙烯嵌段 共聚物之樹脂組合物’或者含有聚丙烯系樹脂、茂金屬系 聚丙烯系樹脂及低密度聚乙烯系樹脂之樹脂組合物。 構成谷器本體2之表面下層22係於表面層21之下方與兮 表面層2 1鄰接配置之層’作為表面下層22之構成材料，例 如可使用聚丙烯系樹脂、聚乙烯系樹脂等烯烴系樹脂之材 料，聚笨乙烯系樹脂、聚對苯二甲酸乙二酯（pET， Polyethylene terephthalate)等聚酯系樹脂之材料，及該等 之混合材料。 構成容器本體2之基材層23係暴露於容器本體2之外部之 層’作為基材層23之構成材料’可使用聚丙烯系樹脂、聚 乙烯系樹脂等烯烴系樹脂之材料，聚苯乙烯系樹脂、聚對 笨二曱酸乙二酯（PET)等聚酯系樹脂之材料，及該等之混 合材料。基材層23可為單層亦可為積層體。於基材層23為 積層體之情形時，就阻氣性之觀點而言，例如亦可進而具 有包含乙烯-乙烯醇共聚物、尼龍、聚對笨二甲酸乙二醋 154804.doc 201139225 (PET)、聚偏一氣乙稀（PVDC，p〇iyVinyiidene Chloride)等 樹脂材料之阻氣層、或由鋁蒸鍍等而形成之阻氣層β (蓋材3之構成） 於本實施形態中，蓋材3係包含暴露於易開封性容器i之 外部之外層32'及與容器本體2之表面層21熱封之密封層 • 3 1之薄膜狀積層體。 作為密封層31之構成材料，於使容器本體2之表面層21 凝聚破壞而剝離之開封態樣下，在採用上述樹脂組合物作 為構成此種表面層21之樹脂之情形時，可使用無規聚丙烯 (RPP，Random PolyproPylene)、嵌段聚丙烯（Bpp，B1〇ck Polypropylene)、直鏈狀低密度聚乙烯（LLDpE，Linear Low Density Polyethylene)、聚乙烯等 β 作為外層32之構成材料’可使用聚對苯二甲酸乙二酯 (PET)膜、雙軸延伸尼龍膜（〇_Ny#。 再者，於容器本體2中採用如上之表面層21，且蓋材3中 採用密封層31並將兩者熱封之情形時，兩層21、31融著， 另一方面，當開封時，使不耐應力之容器本體2之表面層 21凝聚剝離，從而良好地進行開封。 (樹脂積存部6之構成） • 樹脂積存部6係由容器本體2之表面層21之樹脂積存61、 表面下層22之樹脂積存62、及蓋材3之密封層31之樹脂積 存63集合而形成。 並且’樹脂積存部6必須以滿足下述數式（F丨）： 0.25$ Α/Β$ 1.2 ... (F1) 154804.doc 201139225 所表示之條件之方式而形成。於藉由滿足上述數式（F1)中 所表示之條件而獲得之易開封性容器1中，可充分抑制開 封時之毛鬚之產生及密封強度之不均。 於上述數式（F1)中，A(參照圖2)表示於上述樹脂積存部 中，自上述凸緣部之上述表面下層之表面至上述蓋材之密 封層之表面為止的高度尺寸，B(參照圖2)表示於上述樹脂 積存部中，自上述樹脂積存部中之上述表面下層之根部至 上述樹脂積存部中之上述表面下層之最内側到達點為止的 寬度尺寸。 虽上述數式（F1)中之（A/B)之值小於〇 25時 人 分抑制開封時之毛鬚之產生，另_方面，若（a/b):值超 過1.2，則無法充分抑制密封強度·密封性之不均。進而 :尤開封時之毛鬚之產生與密封強度之不均之平衡的觀點而 述數式（F1)中之（a/B)之值更佳為〇 3以上〇 8以下。 (易開封性容器1之製造方法） (F1)中所？ Μ1之製造方法只要為可形成滿足上述數式 制，例it之條件之樹脂積存部6之方法則並無特別限 容器卜曰由以下說明之方法而高效率地製造易開封性 (第1熱封步驟） 圖3係表示本實施形鲅中 m 之第1熱封步驟之模式圖。又， 圖4係表示於第1熱封步驟中，將第 ^ 將第1娘狀密封盤7按壓至ώ 緣部25後之狀態之部分剖面圖。 主e 如圖3及圖4所示，於第丨埶 ,、'、封步驟中，係、藉由使蓋材3養 154804.doc 201139225 疊於容器本體2之凸緣部25，自蓋材3之上部將加熱狀態之 環狀密封盤7朝向圖3之箭頭方向按壓而實施。藉此將暴露 於容器本體2之凸緣部25之表面層21與蓋材3之密封層31熱 封。 並且’如圖4所示，在第1熱封步驟中，於凸緣部25上所 具有之密封部26之内周緣附近（圖4之X位置），以將容器本 體2之表面下層22、表面層21及蓋材3之密封層31朝向容器 本體2之開口部24方向擠壓之方式形成瘤（c〇b)狀樹脂積存 部6 〇 如圖4所示，樹脂積存部6係由容器本體2之表面層2 1之 樹脂積存61、表面下層22之樹脂積存62、及蓋材3之密封 層31樹脂積存63集合而形成。 又’於本發明中，在位於凸緣部25上表面之環狀密封部 26之内周緣附近X，整周形成有上述之樹脂積存部6，另一 方面’於位於開封起始部4之環狀密封部26之外周緣，形 成有較位於内周緣附近X之樹脂積存部6更小之樹脂積存， 或者環狀密封部26之外周緣成為平面。 圖5係表示第1環狀密封盤7之部分剖面圖。 第1熱封步驟中所使用之第1環狀密封盤7係以如下方式 形成：相對於凸緣部上表面，將内周緣（圖5之r位置）加工 成剖面曲線狀（R加工），外周緣較第i環狀密封盤7之前端 (圖5之前端73)更晚接觸於蓋材3。具體而言，第1環狀密封 盤7係經由邊界a(亦為環狀密封盤7之前端73)於外周緣側 連續形成有剖面成為傾斜狀之傾斜面部71，且於内周緣側 154804.doc 201139225 連續形成有進行R加工而使剖面為曲線狀之曲面部72。 其中，如圖5所示，形成於第丨環狀密封盤7之外周緣側 之傾斜面部71相對於凸緣部25自内周緣朝向外周緣而形成 之角度（Θ)根據環狀密封盤7之寬度w而不同，但較佳為設 疋於自2至20。之範圍内，更佳為設為於自3。至15。之範圍 内。 若該傾斜面部71之角度小於2。，則即便於第丨熱封時進 打按壓之情形時，如圖4所示之樹脂積存部6亦容易形成於 密封部26之外周緣附近。其結果，所獲得之容器ι之開封 時於密封部26外侧之阻力變大，而難以順利進行易開封性 谷器1之開封。另一方面，若傾斜面部71之角度超過2〇〇， 則邊界A之周邊並非平坦而較尖。其結果，於密封時或開 封時有切割蓋材3之情形，且有可能損害易開封性。 又，關於對形成於第1環狀密封盤7之内周緣側之曲面部 72實施之R加工，根據第丨環狀密封盤7之寬度尺寸w而不 同，但曲率半徑R(單位：mm)較佳為〇 2以上且第！環狀密 封盤7之寬度尺寸之〇5倍以下，更佳為〇4以上且第1環狀 密封盤7之寬度尺寸之〇.4倍以下。當R小於上述下限時， 邊界A之周邊並非平坦而較尖，密封時或開封時有切割蓋 材3等之情形。另一方面，若曲率半徑r超過上述上限，則 即便於第1熱封時進行按壓之情形時，樹脂積存部6亦難以 形成於凸緣部25之密封部26之内周緣附近X。 此處，對於第1環狀密封盤7，該等傾斜面部71及曲面部 72較佳為以邊界A成為相對於第1環狀密封盤7之剖面寬度 154804.doc 201139225 方向靠近内側（靠近内周緣）之方式而形成。只要邊界A相 對於第1環狀密封盤7之剖面寬度方向為内側，則於第1環 狀密封盤7之内周緣側形成有曲面部72、於該密封盤7之外 周緣側形成有傾斜面部71之情形亦相互作用，進行第1熱 封時’確實為前端73較第1環狀密封盤7之外周緣側先與蓋 材3接觸（第1環狀密封盤7之外周緣較前端73更晚與蓋材3 接觸）’先接觸於開口部24側之内周緣側之樹脂積存部6選 擇性地形成於内側。 再者’為了使第1環狀密封盤7與如圖1A及圖1B所示之 圓周狀密封部26形成為一體，較佳為製成將傾斜面部71與 曲面部72呈環狀連續形成之環狀密封盤（密封環）。 於使用圖5所示之形狀之第丨環狀密封盤7熱封容器本體2 之凸緣部25與蓋材3之情形時，首先，將第i環狀密封盤7 中之傾斜面部71與曲面部72之邊界A所對應之前端73與蓋 材3相連接，其後，將形成於邊界A之内周緣側之曲面部72 朝向蓋材3之内側按壓’且將形成於邊界a之外周緣側之傾 斜面部71朝向蓋材3之外側按壓。藉此，將容器本體2之表 面層21及與表面層21鄰接之表面下層22之樹脂成分自上述 邊界A之下部擠壓至容器本體2之内側，於凸緣部25之連接 第1環狀密封盤7之内周緣之位置附近、即容器本體2之密 封。卩26之内周緣附近χ形成隆起之瘤狀樹脂積存61、62， 且蓋材3之密封層31亦隨之形成樹脂積存63，於該等形成 樹月曰積存部6之狀態下’將暴露於容器本體2之凸緣部乃之 表面層21與蓋材3之密封層31熱封，兩者融著。 154804.doc 201139225 第1熱封步，驟中之密封條件只要根據進行熱封之材料之 種類等適當決定即可。作為密封溫度，通常只要設為自 160°C至240°C之範圍即可。作為密封壓力，通常只要設為 150 kg/cm2至350 kg/cm2之範圍〇5〇〇〇心至刪心之 範圍）即可。作為密封時間，通常只要設為〇5秒至4〇秒之 範圍即可。 較佳為藉由如上所述之第！熱封步驟，而可形成滿足上 述數式（F1)所表示之條件之樹脂積存部6之情形，但例 如，如進行連續生產之情形時，有無法穩定地形成滿足上 述數式㈣所表示之條件之樹脂積存部6之情形。因此， ，更穩定地形成滿足上述數式㈢所表示之條件之樹脂積 存部6之觀點而言’更佳為進行以下說明之第2熱封步驟。 (第2熱封步驟） /6係表示於本實施形態之仏熱封步驟中，將第2環狀 被封盤8按壓至凸緣部25後之狀態之部分剖面圖。 8自於蓋IT封步驟中’係藉由將加熱狀態之第2環狀密封盤 體 =3之上部進行按壓而實施，藉此，將暴露於容器本 封。、緣部25之表面層21與蓋材3之密封層”進一步熱 如圖6所示，於第2熱封步 具 T將形成於凸緣部25上所 此密封㈣之㈣緣附近之樹脂積存部6壓扁。如 11更穩疋地形成滿足上述數式 脂積存部6。 D所表示之條件之樹 為了使第2熱封步驟中所使用之第2環狀密封盤8與如圖 154804.doc 201139225 1A及圖1B所示之圓周狀密封部26形成為一體，只要為呈 環狀連續形成平坦之密封面或曲面狀之密封面之環狀密封 盤（密封環）即可。 於第2熱封步驟中，為了防止自凸緣部25之外周緣進入 夾雜物’更佳為密封面為平坦之環狀密封盤以便可自樹脂 積存部熱封至凸緣部25之外側端部。 第2熱封步驟中之密封條件只要根據進行熱封之材料之 種類等適當決定即可。4乍為密封溫度，通常只要設為 120c至200t之範圍即可。作為密封壓力，通常只要設為 kg/cm 至 250 kg/cm2之範圍（15000 kPA至 25000 kPA之 範圍）即可作為松封時間，通常只要設為0.5秒至4·0秒之 範圍即可。 (易開封性容器1之開封） 圖係表示本貫鈀形態之易開封性容器1經初期開封之狀 °】面圖圖8係表示本實施形態之易開封性容器1經完 全開封之狀態之剖面圖°再者，此處所謂t「初期開封之 狀態」，係指經凝聚剝離之剝離面未到達樹脂積存部6之狀 態。 如上所述，為了自開封起始部4開封將容器本體2之凸緣 部25與蓋材3熱封而獲得之本實施形態之易開封性容号】， 如圖7所示，於朝向圖7之箭頭方向對蓋材3施加力f之情形 時’進行容器本體2之表面層21之凝聚剝離。 又，當該凝聚剝離到達樹脂積存料，表面層21之凝 聚剝離係沿著形成於與表面層21鄰接之表面下層22之樹脂 154804.doc •15- 201139225 積存62之形狀而進行β 並且’若表面層21之凝聚剝離到達密封部26之内周緣附 近（亦成為切割位置）χ，則以追隨於形成於蓋材3之密封層 31之樹脂積存63之形狀之方式切割容器本體2之表面層21 之樹脂積存61，藉此可容易地進行易開封性容器1之容器 本體2與蓋材3之開封。 (第1實施形態之效果） 根據如上所述之第1實施形態，可發揮如下之效果。 易開封性谷器1係將於開口部24之周緣配設凸緣部25之 容器本體2、該容器本體2之凸緣部25與蓋材3呈環狀地熱 封而成，因此可維持高密封性，並且藉由使容器本體2之 表面層21凝聚破壞而可開封蓋材3,因此與使容器本體2之 表面層21與鄰接於該表面層21之表面下層22界面剝離之態 樣相比，初期開封強度亦穩定，且順利地進行開封。又， 可防止產生開封時，位於樹脂積存部6之表面層21延伸而 使易開封性容器1之開封外觀變差之問題。 又，由於在凸緣部25之密封部26之内周緣附近χ，形成 有包含容器本體2之表面層21、與該表面層21鄰接之表面 下層22及蓋材3之密封層3丨之構成樹脂之瘤狀樹脂積存部 ό因此可確保同密封性。進而’由於該樹脂積存部6滿足 j述數式（F1)所表示之條件，因此可充分抑制易開封性容 β 1中之密封強度之不均。又’於藉由第i熱封步驟而無法 形成滿^上述數式（F 〇所表示之條件之樹脂積存部6之情 形時’亦可於第2熱封步驟中壓扁樹脂積存部6。如此，例 154804.doc 201139225 如當因連續生產而僅進行第丨熱封步驟時，於無法穩定地 形成滿足上述數式（F1)所表示之條件之樹脂積存部6之情 形時’亦可更穩定地提高易開封性容器1之密封強度。 又’作為用以與第1熱封同時形成瘤狀樹脂積存部6之第 1環狀密封盤7，使用相對於凸緣部25上表面，於内周緣形 成有剖面為曲線狀之曲面部72、於外周緣側形成傾斜面部 71者’因此樹脂積存部6可特別選擇性地形成於密封部26 之内周緣附近X，反之可不形成於外周緣附近。又，當進 行第1熱封時’於上述樹脂積存部6之根部附近之容器外周 側’防止切割蓋材3之密封層31或容器本體2之表面層21， 故可避免蓋材3於中途拉斷而損害易開封性之問題。 進而’由於在製造時第1環狀密封盤7及第2環狀密封盤8 之定位亦不嚴格’因此生產性亦良好，能夠以低成本提供 高品質之易開封性容器1。 [第2實施形態] 上述第1實施形態之易開封性容器1係表示當開封容器本 體2與蓋材3時’使容器本體2之表面層21凝聚剝離而開封 之態樣者。 與此相對’如圖9及圖10所示，第2實施形態之易開封性 容器la與第1實施形態之不同之處在於：當開封容器本體2 與蓋材3時’使蓋材3之密封層31凝聚剝離。 再者，於本實施形態中，關於與上述第1實施形態相同 構造及相同構件’附加相同符號，並省略或簡化其說明。 圖9係表示本實施形態之易開封性容器丨a經初期開封之 154804.doc 17· 201139225 狀態之剖面圖，圖1 〇係表示本實施形態之該易開封性容器 1 a經完全開封之狀態之剖面圖。 如圖9及圖1〇所示’使構成易開封性容器la之蓋材3之密 封層31凝聚破壞。於以剝離蓋材3之方式開封之情形時， 作為構成密封層3 1之材料，可使用苯乙烯接枝丙烯樹脂、 黏著性聚烯烴樹脂等。又，作為容器本體2之表面層2 j， 可使用聚丙烯系樹脂、聚乙烯系樹脂等聚烯烴系樹脂，及 將該等加以混合者等。 於此種蓋材3中採用密封層31、容器本體2中採用表面層 21並將兩者熱封之情形時，兩層21、31融著，另一方面， 备開封時，使不耐應力之蓋材3之密封層31凝聚破壞，而 良好地進行開封。 (易開封性容器la之開封） 如圖9所不，當自開封起始部4開封本實施形態之易開封 f生合益la時，若朝向圖9之箭頭方向對蓋材3施加力f，則 進行蓋材3之密封層3 1之凝聚剝離。並且，當開封到達樹 積存。卩6時，後封層3丨之凝聚剝離係沿著形成於與該密 封層31熱封之容器本體2之表面層。之樹脂積存“之形狀 而進行。 /蓋材3之社封層31之凝聚剝離到達密封部“之内周緣 近(亦成為切割位置)x之後，藉由切割密封層3 i之樹脂 子而可令易地進行易開封性容器之容器本體2與蓋 材3之開封。 (第2實施形態之效果） 154804.doc 201139225 根據該第2實施形態’可發揮與藉由上述第i實施形態而 發揮之效果大致相同之效果。 [其他實施形態] 再者卩上說明之態樣係表示本發明之一態樣者，本發 明並不限定於上述之實施形態，#然具有本發明之構成、 可達成本’x明之目的及效果之範圍内的變形或改良包含於 本發明之内容中…實施本發明時之具體之構造及形狀 等於可達成本發明之目的及效果之範圍内，亦可設為其他 構造或形狀等。 例如’於上述實施形態中’第1施形態表示將容器本 體2之表面層21凝㈣離之態樣，又，第2實施形態表示將 蓋材3之密封層31凝聚剝離之態樣，但於本發明中，亦包 含當開封時，使容器本體2之表面層21與蓋材3之密封㈣ 之兩層凝聚破壞而開封之情形。進而，於容器本體2之表 面層21與表面下層22為相同構件之情形時，上述相同構件 可與蓋材3之密封層31熱封，當開封蓋材3時，將蓋材3之 密封層31凝聚破壞之情形可期待上述之本發明之效果，故 而包含於本發明中。 於此情形時，在圖7至圖10之圖中，亦可觀察到表面層 21與表面下層22看似不同層但實為同一構件，方便起見而 將表面下層22之進行凝聚破壞之部分（凸緣部乃之表面）示 為表面層21。 又，進行凝聚剝離之容器本體2之表面層21或蓋材3之密 封層31之構成材料除了上述實施形態中所示之例以外，例 154804.doc •19· 201139225 如表面層21亦可使用將聚丙稀與乙婦甲基丙稀酸共聚物 或乙烯-四環十二烯共聚物加以混合者，密封層31亦可使 用飽和共聚聚酯系樹脂。 再者，於實施本發明之易開封性容器之製造方法製造圖 1A、圊1B及圖2所示之構成的易開封性容器之情形時，有 時除了形成於連接環狀密封盤7之内周緣之位置所對應部 分之樹脂積存部6以外，亦可於連接第丨環狀密封盤7之外 周緣之位置所對應之部分形成有樹脂積存。於此情形時， 形成於内周緣之樹脂積存大於形成於外周緣之樹脂積存， 因此可維持良好之易開封性及高密封性。 此外，本發明之實施中之具體構造及形狀等於可達成本 發明之目的之範圍内亦可設為其他構造等。 [實施例] 其次’藉由實施例及比較例對本發明進行更詳細地說 明’但本發明並不受到該等示例之任何限定。 [實施例1] 使用下述材料及方法製造整體形狀示於圖1Α及圖丨8且 開封起始部之剖面構成示於圖2之本發明之易開封性容 器。 使用進行分配器方式複合擠壓之多層片材製造裝置，而 成形依序具備下述所示之表面層21/表面下層22/基材層23 之厚度為600 μπι之積層體。 表面層21 ··包含將聚丙稀（普瑞曼聚合物（Prime Polymer)公 司製，製品名「E-105GM」）70質量。/。與乙烯-丙烯酸酯-順 154804.doc •20· 201139225 丁稀二酸Sf共聚物（日本聚乙稀公司製，製品名「Rexp 1 ET220X」）30質量％加以混合者之層（厚度：2〇 μηι) 表面下層22 :包含將聚丙烯（普瑞曼聚合物公司製，製品 名「E-105GM」）80質量。/〇與聚乙烯（宇部丸善聚乙稀公司 製’製品名「ΗΕ-30」）20質量％加以混合者之層（厚度. 1 00 μηι) 基材層23:依序具備包含聚丙烯（普瑞曼聚合物公司製， 製品名「E-105GM」）之層（厚度：15〇 μηι)/包含黏著性樹 脂（順丁烯二酸酐改質聚丙烯，三菱化學公司製，製品名 「ModicAP Ρ604」）之層（厚度：5 μιη)/包含乙烯-乙烯醇 (EVOH，可樂麗（Kuraray)公司製，製品名「EVAL j」）之 層（厚度.30 μιη)/包含黏著性樹脂（順丁烯二酸酐改質聚丙 烯，三菱化學公司製，製品名rModicAp P6〇4j )之層（厚 度：5 μηι)/包含聚丙烯（普瑞曼聚合物公司製，製品名「£_ 105GM」）之層（厚度：3〇〇 μιη)之積層體。 繼而，藉由使用該積層體並進行模塞助壓（plug assist)真 空成形而成形大小為130 mmxi5〇 mmx30 mm之帶凸緣之 谷器本體2。再者，該容器本體2係以於開口部24具有寬度 15 mm之凸緣部25 ’且成為大致長方形之托盤狀之方式而 形成。 於以此方式所得之容器本體2之開口部24周緣之凸緣部 25 ’載置依序具備下述所示之外層32/密封層31之多層膜 作為蓋材3。 154804.doc •21· 201139225 外層32:依序具備聚對苯二曱酸乙二酯（PET)膜（三菱化學 製，製品名「techbarrier」，厚度：12 μπι)/包含聚醯胺（製 品名「尼龍」）之層（厚度：15 μιη)之積層體。 密封層31 :直鏈狀低密度聚乙烯膜（Lldpe膜，Idemitsu Unitech公司製，製品名「LS700C」，厚度：60 μιη)。 並且’使用整周形成有傾斜面部71與曲面部72之下述第 1環狀密封盤（密封環）作為密封盤’並藉由下述之第1密封 條件對蓋材3及容器本體2之凸緣部25進行第1熱封。 (第1環狀密封盤之規格） 密封寬度·· 3 mm 密封面之傾斜角度Θ(傾斜面部71) : 6。 密封面之R加工（曲面部72)之曲率半徑R :丨〇 mm (第1密封條件） 密封溫度：220°C 密封壓力：200 kg/個 密封時間：1.2秒 繼而，使用下述第2環狀密封盤（密封環）作為密封盤， 並藉由下述第2密封條件對蓋材3及容器本體2之凸緣部25 進行第2熱封而獲得易開封性容器。再者，測定第2熱封步 驟後之以凸緣部25之表面下層22之表面作為基準時之樹脂 積存部的高度A(參照圖2)、及自與樹脂積存中之表面層鄰 接之層的根部（突出部）至與樹脂積存中之表面層鄰接之層 的最内側到達點為止的距離B(參照圖2)。然後算出（A/B)之 值，示於表1。 154804.doc •22· 201139225 又’將構成蓋材3之密封層31之樹脂’以及第2熱封步驟 中之密封溫度及密封盤之密封面之形狀示於表i。 (第2環狀密封盤之規格） 密封寬度：10 mm 密封面之形狀：平面 (第2密封條件） 密封溫度：2001： 密封壓力：200 kg/個 密封時間：1.2秒 [實施例2] 除了將第2熱封步驟中之第2密封條件以如下方式變更以 外，以與實施例1相同之方式獲得易開封性容器。再者， 於實施例2中亦算出（A/B)之值並示於表丨。又，將構成蓋 =3之密封層31之樹脂，以及第2熱封步驟中之密封溫度及 密封盤之密封面之形狀示於表1。 (第2密封條件） 密封溫度：12〇。〇 密封壓力：200 kg/個 密封時間：1.2秒 [實施例3] 除了將第2熱封步驟中之第2密封停件 & 來件以如下方式變更以 外’以與實施例1相同之方式獲得易 & — 易開封性容器。再者， 於貫施例3中亦算出（A/B)之值並示 材3之宓私麻， 、表1 °又’將構成蓋 材3之在封層31之樹脂，以及第 ”、、封步驟中之密封溫度及 154804.doc -23- 201139225 密封盤之密封面之形狀示於表1。 (第2密封條件） 密封溫度：180°C 密封壓力：200 kg/個 密封時間：1.2秒 [實施例4] 除了將第2熱封步驟中之第2密封條件以如下方 、 外，以與實施例1相同之方式獲得易開封性容器1 =更以 於實施例4中亦算出（A/B)之值並示於表丨。又，再者: ，密封層Μ之樹脂’以及第2熱封步驟中之密封 社、封盤之密封面之形狀示於表1。 (第2密封條件） 密封溫度：15〇°c 密封壓力：200 kg/個 密封時間：1.2秒 [實施例5] 除了使用下述者作為第2熱封步驟中之第2環狀密封盤以 外’以與實施例1相同之方式獲得易開封性容器。再者， 於實施例5中亦算出（A/B)之值並示於表1。又，將構成蓋 材3之密封層3 1之樹脂，以及第2熱封步驟中之密封溫度及 密封盤之密封面之形狀示於表1。 (第2環狀密封盤之規格） 在' 封寬度：1 〇 mm 密封面之形狀：曲面狀 154804.doc • 24· 201139225 密封面之曲面之曲率半徑R : 50 mm [實施例6] 除了使用依序具備下述所示之外層32/密封層31之多層 膜作為蓋材3以外，以與實施例丨相同之方式獲得易開封性 谷器。再者，於實施例6中亦算出（A/B)之值並示於表1 ^ 又，將構成蓋材3之密封層31之樹脂，以及第2熱封步驟中 之密封溫度及密封盤之密封面之形狀示於表1。 外層32 .依序具備聚對笨二甲酸乙二酯（pET)膜（三菱化學 製，製品名「techbarrier」，厚度：12 μιη)/包含聚醯胺（製 品名「尼龍」）之層（厚度·· 15 μιη)之積層體。 密封層31 :包含將聚丙烯（普瑞曼聚合物公司製，製品名 E 105GM」）70質量。/。與乙稀_丙稀酸醋_順丁稀二酸酐共 聚物（日本聚乙烯公司製，製品名「Rexpearl ΕΤ22〇χ」） 3〇質量％加以混合者（1^系樹脂）之層（厚度：6()0111) [實施例7] 除了使用下述者作為第2熱封步驟中之第2環狀密封盤以 外，以與實施例6相同之方式獲得易開封性容器。再者， 於實施例7中亦算出（Α/Β)之值並示於表！。又，將構成蓋 材3之密封層31之樹脂，以及第2熱封步驟中之密封溫度及 密封盤之密封面之形狀示於表1。 (第2環狀密封盤之規格） 密封寬度：10 mm 密封面之形狀：曲面狀 密封面之曲面之曲率半徑R: 50 mm 154804.doc •25· 201139225 [比較例1】 除了不進行第2熱封步驟以外，以與實施例1相同之方式 獲得易開封性谷器。再者’由於比較例i中不進行第2熱二 步驟’因此算出第〗熱封步驟後之（A/B)之值並示於表卜 又，將構成蓋材3之密封層31之樹脂示於表1。 [比較例2] 除了使用下述者作為第2熱封步驟令之第2環狀密封盤以 外，以與實施例1相同之方式獲得易開封性容器。再者， 於比較例2中’由於在樹腊積存部㈣藉由滾花形成有凹 凸，因此無法測定第2熱封步驟後之以凸緣扣之表 m表面作為基準時之樹脂積存部的高度A。又，將構 =蓋材3之密封層31之樹脂，以及第2熱封步驟中之密封严 度及密封盤之密封面之形狀示於表1。 風 (第2環狀密封盤之規格） 密封寬度：10 mm 密封面：滾花 [比較例3 ] 除了將第2熱封步驟中之第2密封條件以 外，以與實施m相同之方式獲得易開：式^ 於比較例3中亦算出（A/B)之值並示於表卜盗。再者 材3之密封層31之樹脂’以及第2熱封 又，將構成」 密射般少，驟中之密封溫度, 在封盤之松、封面之形狀示於表1。 (第2密封條件）201139225 VI. Description of the Invention: [Technical Field] The present invention relates to an easy-opening container and a method of manufacturing the same, and more particularly, the present invention relates to a container which can be preferably used for foods and the like. Easy-opening container and method of manufacturing the same. _ [Prior Art] As a food packaging form, the food is stored in a container body having a flange portion at the periphery of the opening, and the flange portion and the film of the container body are formed. The cover material is heat sealed and sealed with a lidded container. In such a capped container, a high sealing property is required from the viewpoint of safely storing foods stored in the container. Further, from the viewpoint of easily peeling off the lid member from the container body when opening the lid member, it is also required to be easy to open. For example, it is proposed to form a resin reservoir on the inner peripheral side and the outer peripheral side of the flange portion of the container body (refer to Japanese Patent Laid-Open No. Hei 1-213171 and Document No. 2: Japanese Patent No. Japanese Patent Laid-Open No. Hei. No. Hei. No. 2006-206128, the entire disclosure of which is incorporated herein by reference. And a resin storage portion is formed on the inner peripheral side and the outer peripheral side of the flange portion of the container body, and the resin storage portion on the outer peripheral side is formed by flattening (refer to Japanese Patent Laid-Open No. Hei 2-219766 and Document 6). Japanese Patent Laid-Open No. Hei 2-219767). However, even if it is attached to the container described in Document 1 and Document 2, it is subject to 154804. Doc 201139225 The influence of the resin reservoir on the peripheral side is still insufficient for easy opening. Further, in the case of the capped container which has been carried out in the documents 1 and 2, there is a problem that the sealing strength is uneven, so that it is not stably produced in the multi-column sealing device. Further, in the capped containers described in the documents 3 and 4, there is a problem that the seal strength is uneven, and there is a problem in that it cannot be stably produced in a multi-column sealing device. Further, even in the case of the capped container described in the literatures 5 and 6, the resin reservoir on the outer peripheral side is affected by the flattening, and the easy-opening property is not sufficient. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an easy-opening container capable of sufficiently suppressing the generation of hair and the unevenness of the sealing strength at the time of opening, and having high sealing property and easy opening property, and the manufacture thereof. method. In order to solve the above problems, the present invention provides an easy-opening container and a method of manufacturing the same. That is, the present invention is an easy-opening container, characterized in that the container body includes a laminate having at least a surface layer and a lower surface layer, and has a flange portion at a periphery of the opening portion, and a cover member having at least a sealing layer to which the surface layer is adhered; wherein the surface layer of the flange portion and the sealing layer of the lid member are heat-sealed in an annular shape, and at least one of the container body and the (four) portion of the lid member is interfaced or The surface of the container body is formed, and the cover material is opened, and the surface of the container body is formed on the inner peripheral side of the sealing portion on the flange portion so as to satisfy the condition expressed by the following formula (F1). The layer, the lower surface layer, and the sealing layer of the cover material constitute a resinous resin reservoir of the resin. 154804. Doc 201139225 0. 25^ A/B^ 1. (FI) (In the formula (FI), A is a height dimension from the surface of the surface lower layer of the flange portion to the surface of the sealing layer in the resin reservoir, and B is represented by In the resin reservoir, the width dimension from the root portion of the surface lower layer in the resin reservoir to the innermost point of the surface lower layer in the resin reservoir portion). In the easy-opening container of the present invention, the cover material can be opened by agglomerating the surface layer of the container body, and the surface layer of the container body is preferably made of a polypropylene resin and an ethylene acrylate. It is formed by a resin composition of a maleic acid liver copolymer. In the easy-opening container of the present invention, the cover material can be opened by agglomerating the surface layer of the container body, and the surface layer of the container body is preferably made of a polypropylene resin or a polyethylene resin. It is formed by a resin composition of a styrene-ethylene-butylene-styrene block copolymer. In the easy-opening container of the present invention, the cover material can be opened by agglomerating the surface layer of the container body, and the surface layer of the container body is preferably made of a polypropylene resin or a low density polyethylene. A resin composition of a resin and a metallocene-based polypropylene resin is formed. In the method for producing an easy-opening container according to the present invention, the easy-opening container includes a container body including a laminate having at least a surface layer and a lower surface layer, a flange portion at a periphery of the opening portion, and a lid member. a sealing layer capable of adhering to the surface layer; at least one of the surface layer of the flange portion and the sealing layer of the lid member being heat-sealed in an annular manner to seal the sealing portion between the container body and the lid member The interface is peeled off or condensed by 154804. Doc 201139225 is broken, whereby the cover material is used, and the manufacturing method is characterized by 'on the inner peripheral side of the seal portion on the flange portion to satisfy the condition shown by the following formula (fi) And forming a nodular resin reservoir including a surface layer of the container body, the surface lower layer, and the sealing layer of the lid member. 0. 25^A/B^ 1. 2 . . . (pi) (In the formula (F1), A is a height dimension from the surface of the surface lower layer of the flange portion to the surface of the sealing layer in the resin reservoir, and B is indicated in the resin reservoir. a width dimension from a root portion of the surface underlayer in the resin reservoir to an innermost arrival point of the surface underlayer in the resin reservoir. In the method for producing an easy-opening container of the present invention, it is preferable that the resin storage portion is formed by performing a first heat sealing step of forming a curved surface having a curved cross section by performing R processing on the inner periphery. And a tapered annular sealing disk is formed on the outer peripheral edge from the inner peripheral edge upward, and is pressed from above the lid member superposed on the upper surface of the flange portion of the container body. In such a case, it is preferable to form the resin reservoir by performing the second heat sealing step as follows: after the heat sealing step, and further using an annular sealing disk having a flat sealing surface or The annular sealing disk of the curved sealing surface is pressed against the upper surface of the upper surface of the flange portion of the container body. According to the present invention, it is possible to provide an easy-opening container which can sufficiently suppress the unevenness of the sealing strength and at the same time has a high sealing property and an easy-opening property, and 154804. Doc 201139225 Its manufacturing method. [Embodiment] Hereinafter, embodiments of the present invention will be described based on the drawings. [First Embodiment] (Configuration of the easy-opening container 1) Fig. 1A and Fig. 1B are schematic views showing an aspect of the easy-opening container i of the present invention. Fig. 1A shows a state in which the lid member 3 is sealed. Fig. 18 shows a state in which the cover member 3 is opened from the opening start portion 4. Further, Fig. 2 is a partial cross-sectional view showing the vicinity of the opening start portion 4 of Fig. 1A and the circle 1B. The easy-opening container 1 includes a container body 2 and a film-shaped lid material container body 2, and the lid member 3 is placed on the opening 24, and the flange portion 25 disposed on the periphery of the opening portion 24 of the container body 2 is The lid member 3 is heat-sealed, and an annular seal portion 26 (a seal portion 262 formed of the following second annular seal disk 7 and the second annular seal disk 8) and a second annular seal disk 8 described below are formed. Sealing portion 261) formed as shown in Fig. 1A, the inside of the easy-opening container 1 is in a sealed state. On the other hand, as shown in Fig. 1B, when the easy-opening container 1 in the sealed state is opened, the lid member 3 is directed upward at the opening start portion 4 provided at the corner of the easy-opening container 1 (Fig. 1B). The easy-opening container 1 can be easily opened by pulling in the direction of the arrow. (Configuration of Container Body 2) The respective body 2 shown in Fig. 2 includes a laminate of three layers of the surface layer 21, the surface lower layer 22, and the base material layer 23. Further, the container body 2 has a substantially rectangular tray shape having a specific depth and has a substantially rectangular opening portion 154804. Doc 201139225 24 'A flange portion 25 is disposed on the periphery of the opening portion 24 so as to protrude outwardly. Here, in the present embodiment, the surface layer 21 of the container body 2 is agglomerated and broken. And Kaifeng. When such a cohesive peeling is used, it is preferable that the hair is not generated at the time of opening and the appearance is poor. As a constituent material of the surface layer 21, it is preferable to use a resin composition containing a polypropylene resin and an ethylene-acrylate-maleic anhydride copolymer from the viewpoint of ease of aggregation failure and heat sealability. A resin composition containing a polypropylene resin, a polyethylene resin, and a styrene-ethylene-butylene-styrene block copolymer or a polypropylene resin, a metallocene polypropylene resin, and a low density polyethylene A resin composition of a resin. The surface lower layer 22 constituting the trough body 2 is a layer which is disposed below the surface layer 21 and is adjacent to the crucible surface layer 2 1 . As a constituent material of the surface lower layer 22 , for example, an olefin system such as a polypropylene resin or a polyethylene resin can be used. A material of a resin, a material of a polyester resin such as a polystyrene resin or a polyethylene terephthalate (pET), and a mixed material thereof. The base material layer 23 constituting the container main body 2 is a material which is exposed to the outside of the container main body 2 as a constituent material of the base material layer 23, and a material such as a olefin resin such as a polypropylene resin or a polyethylene resin can be used. A material of a polyester resin such as a resin or a polyethylene terephthalate (PET), and a mixed material thereof. The base material layer 23 may be a single layer or a laminate. In the case where the base material layer 23 is a laminate, from the viewpoint of gas barrier properties, for example, it may further comprise an ethylene-vinyl alcohol copolymer, nylon, and poly(p-dibenzoate) 154804. Doc 201139225 (PET), a gas barrier layer of a resin material such as PVDC, p〇iyVinyiidene Chloride, or a gas barrier layer β formed by aluminum vapor deposition (the composition of the cover material 3) In the form, the cover material 3 includes a film-like laminate which is exposed to the outer layer 32' of the easy-opening container i and the sealing layer which is heat-sealed to the surface layer 21 of the container body 2. As a constituent material of the sealing layer 31, in the case where the resin composition is used as the resin constituting the surface layer 21 in the open state in which the surface layer 21 of the container body 2 is agglomerated and broken, a random can be used. Polypropylene (RPP, Random PolyproPylene), block polypropylene (Bpp, B1〇ck Polypropylene), linear low density polyethylene (LLDpE, Linear Low Density Polyethylene), polyethylene, etc. as a constituent material of the outer layer 32 A polyethylene terephthalate (PET) film or a biaxially stretched nylon film (〇_Ny# is used. Further, the surface layer 21 as described above is used in the container body 2, and the sealing layer 31 is used in the lid member 3 and When the two are heat-sealed, the two layers 21 and 31 are fused, and on the other hand, when the seal is opened, the surface layer 21 of the container body 2 which is not resistant to stress is coagulated and peeled off, and the unsealing is performed satisfactorily. 6) The resin reservoir 6 is formed by a resin reservoir 61 of the surface layer 21 of the container body 2, a resin reservoir 62 of the surface layer 22, and a resin reservoir 63 of the sealing layer 31 of the lid member 3. The accumulation unit 6 must To satisfy the following formula (F丨): 0. 25$ Α/Β$ 1. 2 . . . (F1) 154804. The form of the conditions indicated by doc 201139225 is formed. In the easy-opening container 1 obtained by satisfying the conditions expressed in the above formula (F1), the generation of the hairs at the time of opening and the unevenness of the sealing strength can be sufficiently suppressed. In the above formula (F1), A (see Fig. 2) indicates a height dimension from the surface of the surface lower layer of the flange portion to the surface of the sealing layer of the lid member in the resin reservoir, B ( Referring to Fig. 2), the resin reservoir is a width dimension from the root portion of the surface lower layer in the resin reservoir to the innermost point of the lower surface layer of the resin reservoir. Although the value of (A/B) in the above formula (F1) is less than 〇 25, the generation of hair is suppressed at the time of opening, and if _, if (a/b): the value exceeds 1. 2, the unevenness of the sealing strength and the sealing property cannot be sufficiently suppressed. Further, the value of (a/B) in the formula (F1) is more preferably 〇3 or more and 8 or less, from the viewpoint of the balance between the generation of the hair and the unevenness of the sealing strength at the time of the opening. (Manufacturing method of the easy-opening container 1) (F1)? The method of manufacturing the crucible 1 is not limited to a container, and the method of the following description is adopted, and the method of the following description is adopted to efficiently produce the easy-opening property (the first heat). Sealing Step) Fig. 3 is a schematic view showing the first heat sealing step of m in the embodiment. In addition, FIG. 4 is a partial cross-sectional view showing a state in which the first female sealing disk 7 is pressed to the rim portion 25 in the first heat sealing step. The main e is as shown in Fig. 3 and Fig. 4, in the third, ', and sealing steps, by raising the cover material 3 154804. Doc 201139225 The flange portion 25 which is stacked on the container body 2 is pressed from the upper portion of the lid member 3 by pressing the annular sealing disk 7 in a heated state in the direction of the arrow in Fig. 3 . Thereby, the surface layer 21 exposed to the flange portion 25 of the container body 2 and the sealing layer 31 of the lid member 3 are heat-sealed. And, as shown in FIG. 4, in the first heat sealing step, near the inner periphery of the sealing portion 26 (the X position in FIG. 4) of the flange portion 25, the lower surface layer 22 of the container body 2 is The sealing layer 31 of the surface layer 21 and the lid member 3 is pressed toward the opening portion 24 of the container body 2 to form a tumor-like resin reservoir portion 6. As shown in Fig. 4, the resin reservoir portion 6 is a container. The resin reservoir 61 of the surface layer 2 1 of the main body 2, the resin reservoir 62 of the surface lower layer 22, and the resin layer 63 of the sealing layer 31 of the lid member 3 are formed. Further, in the present invention, the resin reservoir 6 is formed over the entire circumference X in the vicinity of the inner periphery of the annular seal portion 26 on the upper surface of the flange portion 25, and is located at the opening portion 4 of the opening. The outer peripheral edge of the annular seal portion 26 is formed with a resin that is smaller than the resin reservoir portion 6 located near the inner peripheral edge, or the outer peripheral edge of the annular seal portion 26 is flat. Fig. 5 is a partial cross-sectional view showing the first annular sealing disk 7. The first annular sealing disk 7 used in the first heat sealing step is formed by processing the inner circumferential edge (the position r in FIG. 5) into a cross-sectional curved shape (R machining) with respect to the upper surface of the flange portion. The outer periphery is in contact with the cover member 3 later than the front end of the i-th sealing disk 7 (the front end 73 of Fig. 5). Specifically, the first annular sealing disk 7 is continuously formed with an inclined surface portion 71 having an inclined cross section on the outer peripheral edge side via the boundary a (also referred to as the front end 73 of the annular sealing disk 7), and is formed on the inner peripheral edge side 154804. Doc 201139225 A curved surface portion 72 in which a cross section is curved is formed in a continuous manner. Here, as shown in FIG. 5, the inclined surface portion 71 formed on the outer peripheral side of the second annular seal disk 7 is formed at an angle (Θ) from the inner peripheral edge toward the outer peripheral edge with respect to the flange portion 25, according to the annular sealing disk 7 The width w is different, but it is preferably set at from 2 to 20. In the range, it is more preferably set to 3. To 15. Within the scope. If the angle of the inclined surface portion 71 is less than 2. Further, even when the second heat seal is pressed, the resin reservoir 6 as shown in Fig. 4 is easily formed near the outer periphery of the seal portion 26. As a result, the resistance of the obtained container ι to the outside of the sealing portion 26 at the time of opening is large, and it is difficult to smoothly perform the opening of the easy-opening paste 1 . On the other hand, if the angle of the inclined surface portion 71 exceeds 2 〇〇, the periphery of the boundary A is not flat and sharp. As a result, there is a case where the lid member 3 is cut at the time of sealing or opening, and it is possible to impair the easy-opening property. In addition, the R process performed on the curved surface portion 72 formed on the inner peripheral edge side of the first annular seal disk 7 differs depending on the width dimension w of the second annular seal disk 7, but the radius of curvature R (unit: mm) It is preferably 〇2 or more and the first! The width of the annular sealing disk 7 is not more than 5 times, more preferably 〇4 or more and the width of the first annular sealing disk 7. 4 times or less. When R is less than the above lower limit, the periphery of the boundary A is not flat and sharp, and the cover member 3 or the like is cut at the time of sealing or opening. On the other hand, when the radius of curvature r exceeds the above-described upper limit, the resin reservoir 6 is hardly formed in the vicinity X of the inner periphery of the sealing portion 26 of the flange portion 25 when the first heat sealing is performed. Here, in the first annular sealing disk 7, the inclined surface portion 71 and the curved surface portion 72 preferably have a cross-sectional width 154804 with respect to the first annular sealing disk 7 at the boundary A. Doc 201139225 The direction is formed close to the inner side (near the inner circumference). When the boundary A is inside the cross-sectional width direction of the first annular sealing disk 7, the curved surface portion 72 is formed on the inner peripheral edge side of the first annular sealing disk 7, and the outer peripheral side of the sealing disk 7 is inclined. In the case of the face 71, the first heat seal is used, and the front end 73 is in contact with the lid member 3 on the outer peripheral side of the first annular seal disk 7 (the outer peripheral edge of the first annular seal disk 7 is closer to the front end). 73 is in contact with the lid member 3 later. The resin reservoir portion 6 that is in contact with the inner peripheral edge side on the side of the opening portion 24 is selectively formed inside. Further, in order to integrally form the first annular seal disk 7 with the circumferential seal portion 26 as shown in FIGS. 1A and 1B, it is preferable that the inclined surface portion 71 and the curved surface portion 72 are formed in a ring shape continuously. Annular sealing disc (seal ring). When the flange portion 25 of the container body 2 and the cover member 3 are heat-sealed using the second annular seal disk 7 having the shape shown in FIG. 5, first, the inclined surface portion 71 in the i-th annular seal disk 7 is The front end 73 corresponding to the boundary A of the curved surface portion 72 is connected to the lid member 3, and thereafter, the curved surface portion 72 formed on the inner peripheral side of the boundary A is pressed toward the inner side of the lid member 3 and will be formed outside the boundary a. The inclined side surface portion 71 on the rim side is pressed toward the outer side of the lid member 3. Thereby, the resin component of the surface layer 21 of the container body 2 and the surface lower layer 22 adjacent to the surface layer 21 is pressed from the lower portion of the boundary A to the inner side of the container body 2, and the first ring is connected to the flange portion 25. The container body 2 is sealed near the inner periphery of the sealing disk 7. The ridges in the vicinity of the circumference of the crucible 26 form a ridged resin-like resin 61, 62, and the sealing layer 31 of the lid member 3 also forms a resin reservoir 63, which will be exposed in the state in which the tree stagnation reservoir 6 is formed. The surface layer 21 of the flange portion of the container body 2 and the sealing layer 31 of the lid member 3 are heat-sealed, and the two are fused. 154804. Doc 201139225 The first heat sealing step, the sealing condition in the step may be appropriately determined depending on the type of the material to be heat-sealed. The sealing temperature is usually set to be in the range of from 160 °C to 240 °C. As the sealing pressure, it is usually set to a range of 150 kg/cm 2 to 350 kg/cm 2 〇 5 〇〇〇 to the range of the core. As the sealing time, it is usually set to a range of 〇5 seconds to 4 seconds. It is preferably by the above mentioned! In the case of the heat sealing step, the resin reservoir 6 satisfying the condition expressed by the above formula (F1) can be formed. However, for example, in the case of continuous production, the formation of the above formula (4) cannot be stably formed. The case of the resin reservoir 6 of the condition. Therefore, it is more preferable to perform the second heat sealing step described below from the viewpoint of forming the resin reservoir 6 satisfying the conditions expressed by the above formula (3) more stably. (2nd heat sealing step) / 6 is a partial cross-sectional view showing a state in which the second annular sealed disk 8 is pressed against the flange portion 25 in the heat sealing step of the present embodiment. 8 is carried out by pressing the upper portion of the second annular sealing disk = 3 in the heated state from the lid sealing step, thereby exposing it to the container. The sealing layer of the surface layer 21 of the edge portion 25 and the cover member 3 is further heated as shown in FIG. 6, and the resin is formed on the flange portion 25 near the (four) edge of the seal (4) in the second heat sealing step T. The reservoir 6 is flattened. If the 11 is more stable, the conditional tree is satisfied. The tree shown in the condition of D is used to make the second annular sealing disk 8 used in the second heat sealing step. 154804. Doc 201139225 1A and the circumferential seal portion 26 shown in Fig. 1B are integrally formed as long as it is an annular seal disk (seal ring) which continuously forms a flat seal surface or a curved seal surface in a ring shape. In the second heat sealing step, in order to prevent entry into the inclusions from the periphery of the flange portion 25, it is more preferable that the sealing surface is flat and the annular sealing disk is heat-sealed from the resin reservoir to the outer side of the flange portion 25. unit. The sealing conditions in the second heat sealing step may be appropriately determined depending on the type of the material to be heat-sealed or the like. 4乍 is the sealing temperature, and it is usually set to a range of 120c to 200t. As the sealing pressure, it is usually set to the range of kg/cm to 250 kg/cm2 (15000 kPA to 25000 kPA) as the sealing time, usually as long as 0. The range of 5 seconds to 4·0 seconds is sufficient. (Opening of the easy-opening container 1) The figure shows the initial opening of the easy-opening container 1 of the present palladium form. FIG. 8 is a view showing the state in which the easy-opening container 1 of the present embodiment is completely unsealed. In addition, the "state of initial opening" refers to a state in which the peeling surface which has been subjected to aggregation and peeling does not reach the resin reservoir 6. As described above, in order to unsea the opening portion 4, the flange portion 25 of the container body 2 and the lid member 3 are heat-sealed, and the easy-opening capacity of the present embodiment is obtained, as shown in FIG. When the direction of the arrow of 7 applies a force f to the lid member 3, the aggregation and peeling of the surface layer 21 of the container body 2 is performed. Further, when the cohesive peeling reaches the resin stock, the condensation of the surface layer 21 is along the resin 154804 formed on the surface lower layer 22 adjacent to the surface layer 21. Doc •15- 201139225 The shape of the 62 is accumulated to carry out β and 'if the agglomerated peeling of the surface layer 21 reaches the vicinity of the inner periphery of the sealing portion 26 (also referred to as a cutting position), the following is followed by the sealing layer 31 formed on the cover member 3. The resin reservoir 61 of the surface layer 21 of the container body 2 is cut in the shape of the resin reservoir 63, whereby the container body 2 and the lid member 3 of the easy-opening container 1 can be easily opened. (Effect of the first embodiment) According to the first embodiment described above, the following effects can be exhibited. The easy-opening-type barn 1 is a container body 2 in which the flange portion 25 is disposed on the periphery of the opening portion 2, and the flange portion 25 of the container body 2 and the lid member 3 are heat-sealed in an annular shape, thereby maintaining high The sealing property is opened, and the cover material 3 can be opened by agglomerating the surface layer 21 of the container body 2, so that the surface layer 21 of the container body 2 and the surface lower layer 22 adjacent to the surface layer 21 are peeled off. The initial opening strength is also stable, and the opening is smoothly carried out. Further, it is possible to prevent the surface layer 21 located on the resin reservoir 6 from being extended when the unsealing occurs, and the appearance of the unsealing container 1 is deteriorated. Further, the surface layer 21 including the container body 2, the surface under layer 22 adjacent to the surface layer 21, and the sealing layer 3 of the lid member 3 are formed in the vicinity of the inner periphery of the sealing portion 26 of the flange portion 25. The nodular resin reservoir of the resin thus ensures the same sealing property. Further, since the resin reservoir 6 satisfies the condition expressed by the formula (F1), the unevenness of the seal strength in the easy-opening capacity β 1 can be sufficiently suppressed. In the case where the above-described formula (in the case of the resin reservoir portion 6 indicated by F 无法) cannot be formed by the i-th heat sealing step, the resin reservoir portion 6 can be flattened in the second heat sealing step. So, example 154804. Doc 201139225 When only the second heat sealing step is carried out due to continuous production, when the resin reservoir 6 satisfying the condition expressed by the above formula (F1) cannot be stably formed, it is possible to more easily improve the easy opening. The sealing strength of the container 1. Further, as the first annular sealing disk 7 for forming the nodular resin reservoir 6 simultaneously with the first heat seal, a curved surface portion 72 having a curved cross section is formed on the inner peripheral edge with respect to the upper surface of the flange portion 25. The inclined surface portion 71 is formed on the outer peripheral side. Therefore, the resin reservoir portion 6 can be formed particularly selectively in the vicinity X of the inner periphery of the sealing portion 26, and vice versa. Further, when the first heat sealing is performed, 'the outer peripheral side of the container near the root portion of the resin reservoir portion 6' prevents the sealing layer 31 of the lid member 3 or the surface layer 21 of the container body 2 from being cut, so that the cover member 3 can be prevented from being halfway. Breaking and damaging the problem of easy opening. Further, since the positioning of the first annular sealing disk 7 and the second annular sealing disk 8 is not strict at the time of manufacture, the productivity is also good, and the high-quality easy-opening container 1 can be provided at low cost. [Second Embodiment] The easy-opening container 1 of the first embodiment is a case in which the surface layer 21 of the container body 2 is coagulated and peeled off when the container body 2 and the lid member 3 are opened. In contrast, as shown in FIG. 9 and FIG. 10, the easy-opening container 1a of the second embodiment differs from the first embodiment in that the lid member 3 is made when the container body 2 and the lid member 3 are opened. The sealing layer 31 is coagulated and peeled off. In the present embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified. Figure 9 shows the easy-opening container 本a of this embodiment after initial opening 154804. Doc 17·201139225 A sectional view of the state, Fig. 1 is a cross-sectional view showing the state in which the easy-opening container 1a of the present embodiment is completely unsealed. As shown in Fig. 9 and Fig. 1A, the sealing layer 31 constituting the lid member 3 of the easy-opening container la is agglomerated and broken. In the case where the lid member 3 is unsealed, a styrene grafted acryl resin, an adhesive polyolefin resin or the like can be used as the material constituting the sealing layer 31. Further, as the surface layer 2 j of the container main body 2, a polyolefin-based resin such as a polypropylene resin or a polyethylene resin, and the like may be used. When the sealing layer 31 is used in the cover member 3, and the surface layer 21 is used in the container body 2, and the two layers are heat-sealed, the two layers 21, 31 are fused, and on the other hand, the stress is not resistant when the package is opened. The sealing layer 31 of the lid member 3 is agglomerated and broken, and the sealing is performed well. (Opening of the easy-opening container la) As shown in Fig. 9, when the opening portion 4 of the opening is opened from the opening portion 4, the force is applied to the lid member 3 in the direction of the arrow of Fig. 9. Then, the sealing layer 31 of the lid member 3 is subjected to aggregation and peeling. And, when Kaifeng arrives at the tree, it accumulates. At 卩6, the cohesive peeling of the back seal layer 3丨 is along the surface layer of the container body 2 formed in the heat seal with the seal layer 31. The resin is deposited in a "shape. / After the cohesive peeling of the sealing layer 31 of the cover material 3 reaches the inner periphery of the sealing portion" (also becomes the cutting position) x, the resin of the sealing layer 3 i can be cut. The container body 2 and the lid member 3 of the easy-opening container are easily opened. (Effect of the second embodiment) 154804. According to the second embodiment, the effect of the second embodiment is substantially the same as that obtained by the above-described first embodiment. [Other Embodiments] The above-described aspects are illustrative of one aspect of the present invention, and the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments. Modifications or improvements within the scope of the present invention are included in the scope of the present invention. The specific structure and shape of the present invention are equivalent to the purpose and effect of the invention, and may be other configurations or shapes. For example, in the above-described embodiment, the first embodiment shows that the surface layer 21 of the container body 2 is condensed (four), and the second embodiment shows that the sealing layer 31 of the lid member 3 is coagulated and peeled off. In the present invention, when the unsealing is performed, the two layers of the seal (4) of the surface layer 21 of the container body 2 and the lid member 3 are agglomerated and unsealed. Further, when the surface layer 21 and the lower surface layer 22 of the container body 2 are the same member, the same member can be heat-sealed with the sealing layer 31 of the cover member 3, and when the cover member 3 is opened, the sealing layer of the cover member 3 is used. The case where the above-described effects of the present invention are expected in the case of the aggregation failure is included in the present invention. In this case, in the diagrams of Figs. 7 to 10, it is also observed that the surface layer 21 and the lower surface layer 22 appear to be different layers but are actually the same member, and the portion of the surface lower layer 22 which is coagulated and destroyed by the convenience is convenient. (The surface of the flange portion) is shown as the surface layer 21. Further, the constituent material of the surface layer 21 of the container main body 2 to be coagulated and peeled off or the sealing layer 31 of the lid member 3 is exemplified by the examples shown in the above embodiment, for example, 154804. Doc •19· 201139225 If the surface layer 21 can also be mixed with a copolymer of polypropylene and a methyl methacrylate or an ethylene-tetracyclododecene copolymer, the sealing layer 31 can also be a saturated copolymerized polyester. Resin. Further, in the case of producing the easy-opening container of the configuration shown in FIGS. 1A, 1B, and 2 in the method for producing the easy-opening container of the present invention, sometimes it is formed in addition to the connecting annular sealing disk 7. In addition to the resin reservoir 6 of the portion corresponding to the position of the circumference, resin may be formed in a portion corresponding to the position of the outer periphery of the second annular seal disk 7. In this case, since the resin formed on the inner periphery is accumulated more than the resin formed on the outer periphery, it is possible to maintain good easy-opening property and high sealing property. Further, the specific configuration and shape in the practice of the present invention may be set to other configurations and the like within the scope of the object of the invention. [Embodiment] Next, the present invention will be described in more detail by way of examples and comparative examples, but the invention is not limited by the examples. [Example 1] The entire shape of the opening and sealing portion shown in Fig. 1 and Fig. 8 was produced by the following materials and methods, and the cross-sectional structure of the opening portion of the opening of the invention was shown in Fig. 2. A multilayer sheet manufacturing apparatus which performs a composite extrusion method by a dispenser method is used, and a layered body having a surface layer 21/subsurface layer 22/substrate layer 23 having a thickness of 600 μm as shown below is formed in this order. The surface layer 21·· contains 70 mass of polypropylene (product name "E-105GM" manufactured by Prime Polymer Co., Ltd.). /. With ethylene-acrylate-cis 154804. Doc •20· 201139225 Succinic acid Sf copolymer (manufactured by Nippon Polyethylene Co., Ltd., product name “Rexp 1 ET220X”) 30% by mass mixed layer (thickness: 2〇μηι) Subsurface layer 22: contains polycondensation Propylene (manufactured by Prehman Polymer Co., Ltd., product name "E-105GM") 80 mass. / 〇 and polyethylene (Ube Maru Good Polyethylene Company's product name "ΗΕ-30") 20% by mass of the layer (thickness. 1 00 μηι) Substrate layer 23: A layer (thickness: 15 〇μηι) containing polypropylene (product name "E-105GM", manufactured by Prehmann Polymer Co., Ltd.) / containing an adhesive resin (hundene) Diacid anhydride modified polypropylene, manufactured by Mitsubishi Chemical Corporation, product name "ModicAP Ρ604") (thickness: 5 μιη) / contains ethylene-vinyl alcohol (EVOH, manufactured by Kuraray Co., Ltd., product name "EVAL j" Layer (thickness) 30 μιη)/layer containing adhesive resin (maleic anhydride modified polypropylene, manufactured by Mitsubishi Chemical Corporation, product name rModicAp P6〇4j) (thickness: 5 μηι) / containing polypropylene (Puriman Polymers Co., Ltd.) A layered product of a layer (thickness: 3〇〇μιη) of the product name "£_105GM". Then, the flanged bar body 2 having a size of 130 mm x 5 mm x 30 mm is formed by using the laminated body and performing plug assist vacuum forming. Further, the container body 2 is formed in such a manner that the opening portion 24 has a flange portion 25' having a width of 15 mm and is formed into a substantially rectangular tray shape. In the flange portion 25' of the periphery of the opening portion 24 of the container body 2 obtained in this manner, a multilayer film having the outer layer 32/sealing layer 31 shown below is placed as the lid member 3. 154804. Doc •21· 201139225 Outer layer 32: Polyethylene terephthalate (PET) film (manufactured by Mitsubishi Chemical Corporation, product name “techbarrier”, thickness: 12 μπι)/polyamide (product name “nylon”) Layer of the layer (thickness: 15 μιη). Sealing layer 31: a linear low-density polyethylene film (Lldpe film, manufactured by Idemitsu Unitech Co., Ltd., product name "LS700C", thickness: 60 μm). Further, 'the first annular sealing disk (sealing ring) having the inclined surface portion 71 and the curved surface portion 72 formed as the sealing disk ′ is formed over the entire circumference, and the lid member 3 and the container body 2 are subjected to the first sealing condition described below. The flange portion 25 performs the first heat sealing. (Specification of the first annular sealing disc) Sealing width · · 3 mm Angle of inclination of the sealing surface 倾斜 (inclined surface 71) : 6. R radius of the sealing surface R (curved surface 72) R: 丨〇 mm (1st sealing condition) Sealing temperature: 220 ° C Sealing pressure: 200 kg / piece Sealing time: 1. 2 seconds, the second annular sealing disk (sealing ring) is used as a sealing disk, and the second heat sealing is performed on the lid member 3 and the flange portion 25 of the container body 2 by the second sealing condition described below. Easy-opening container. In addition, the height A (see FIG. 2) of the resin reservoir when the surface of the surface lower layer 22 of the flange portion 25 is used as the reference after the second heat sealing step, and the layer adjacent to the surface layer in the resin accumulation are measured. The distance B from the root (protrusion) to the innermost arrival point of the layer adjacent to the surface layer in which the resin is accumulated (see Fig. 2). Then calculate the value of (A/B), which is shown in Table 1. 154804. Doc • 22· 201139225 Further, the resin of the sealing layer 31 constituting the lid member 3 and the sealing temperature in the second heat sealing step and the shape of the sealing surface of the sealing disk are shown in Table i. (Specification of the 2nd annular sealing disc) Sealing width: 10 mm Shape of the sealing surface: Plane (2nd sealing condition) Sealing temperature: 2001: Sealing pressure: 200 kg / piece Sealing time: 1. 2 seconds [Example 2] An easy-opening container was obtained in the same manner as in Example 1 except that the second sealing condition in the second heat sealing step was changed as follows. Further, the value of (A/B) was also calculated in Example 2 and is shown in Table 丨. Further, the resin constituting the sealing layer 31 of the cover = 3, and the sealing temperature in the second heat sealing step and the shape of the sealing surface of the sealing disk are shown in Table 1. (Second sealing condition) Sealing temperature: 12 〇.密封 Sealing pressure: 200 kg / piece Sealing time: 1. 2 seconds [Example 3] An easy-to-open container was obtained in the same manner as in Example 1 except that the second sealing member & Further, in the third embodiment, the value of (A/B) is also calculated and the material of the material 3 is smear, and the table 1 ° 'will constitute the resin of the cover material 3 in the sealing layer 31, and the first", Sealing temperature in the sealing step and 154804. Doc -23- 201139225 The shape of the sealing surface of the sealing disc is shown in Table 1. (Second sealing condition) Sealing temperature: 180 ° C Sealing pressure: 200 kg / piece Sealing time: 1. 2 seconds [Example 4] An easy-opening container 1 was obtained in the same manner as in Example 1 except that the second sealing condition in the second heat sealing step was as follows: The value of (A/B) is shown in Table 丨. Further, the shape of the sealing layer of the sealing layer and the sealing surface of the sealing plate and the sealing disk in the second heat sealing step are shown in Table 1. (Second sealing condition) Sealing temperature: 15 〇 ° c Sealing pressure: 200 kg / piece Sealing time: 1. 2 seconds [Example 5] An easy-opening container was obtained in the same manner as in Example 1 except that the following was used as the second annular sealing disk in the second heat sealing step. Further, the value of (A/B) was also calculated in Example 5 and shown in Table 1. Further, the resin constituting the sealing layer 31 of the cover member 3, and the sealing temperature in the second heat sealing step and the shape of the sealing surface of the sealing disk are shown in Table 1. (Specification of the 2nd annular sealing disc) In 'Broken width: 1 〇 mm Shape of the sealing surface: curved 154804. Doc • 24· 201139225 Curvature radius R of the curved surface of the sealing surface: 50 mm [Example 6] Except that a multilayer film having the outer layer 32/sealing layer 31 shown below was used as the lid member 3, In the same way, an easy-opening barn is obtained. Further, in Example 6, the value of (A/B) was also calculated and shown in Table 1. Further, the resin constituting the sealing layer 31 of the lid member 3, and the sealing temperature and sealing disk in the second heat sealing step. The shape of the sealing surface is shown in Table 1. Outer layer 32 . A polyethylene terephthalate (pET) film (manufactured by Mitsubishi Chemical Corporation, product name "techbarrier", thickness: 12 μιη) / layer containing polyamidamine (product name "nylon") (thickness·15) The laminate of μιη). The sealing layer 31 contains 70 mass of polypropylene (product name E 105GM, manufactured by Prehmann Polymer Co., Ltd.). /. A layer (thickness::) of a mixture of ethylene methacrylate-acetic acid vinegar-succinic acid anhydride copolymer (manufactured by Nippon Polyethylene Co., Ltd., product name "Rexpearl ΕΤ22〇χ"). 6 () 0111) [Example 7] An easy-opening container was obtained in the same manner as in Example 6 except that the following one was used as the second annular sealing disk in the second heat sealing step. Furthermore, the value of (Α/Β) is also calculated in Example 7 and is shown in the table! . Further, the resin constituting the sealing layer 31 of the cover member 3, and the sealing temperature in the second heat sealing step and the shape of the sealing surface of the sealing disk are shown in Table 1. (Specification of the second annular sealing disc) Sealing width: 10 mm Shape of the sealing surface: curved surface Curvature radius of the curved surface of the sealing surface R: 50 mm 154804. Doc • 25·201139225 [Comparative Example 1] An easy-opening barn was obtained in the same manner as in Example 1 except that the second heat-sealing step was not performed. In addition, 'the second heat step is not performed in the comparative example i', the value of (A/B) after the heat sealing step is calculated and shown in the table, and the resin constituting the sealing layer 31 of the lid member 3 is formed. Shown in Table 1. [Comparative Example 2] An easy-opening container was obtained in the same manner as in Example 1 except that the second annular sealing disk was used as the second heat sealing step. In addition, in Comparative Example 2, since the unevenness was formed by knurling in the tree-lined storage portion (four), it was not possible to measure the resin storage portion when the surface of the surface of the flange fastener m was used as a reference after the second heat-sealing step. Height A. Further, the resin of the sealing layer 31 of the cover member 3 and the sealing rigidity in the second heat sealing step and the shape of the sealing surface of the sealing disk are shown in Table 1. Wind (Specification of the second annular sealing disk) Sealing width: 10 mm Sealing surface: knurling [Comparative Example 3] In the same manner as the implementation of m, except for the second sealing condition in the second heat sealing step Open: Formula ^ The value of (A/B) was also calculated in Comparative Example 3 and is shown in Table. Further, the resin ’ and the second heat-sealing of the sealing layer 31 of the material 3 are less dense, and the sealing temperature in the first step is shown in Table 1 in the shape of the sealing disk and the shape of the cover. (2nd sealing condition)
密封溫度：220°C 154804.doc • 26· 201139225 密封壓力’· 200 kg/個 密封時間：1.2秒 [易間封性容器之評估] 之 關於實施例1至實施例7、及比較例1至比較例3中所得 易開封性容器’藉由以下所示之方法評估開封強度、密封 強度、内翻度及開封時之開封外冑，並冑所得之結果示 於表1 (開封強度） 如圖ΠΑ所示，將容器〗之邊角（開封起始部）切割成μ mm寬度並作為試驗樣品，對該樣品自凸緣部之外側（凸緣 部之外周緣側）朝向内側（容器本體之開σ部側）（圖ι} a之箭 頭方向）使用自動立體測圖儀拉伸試驗機，於135。剝離、 3〇〇 mm/mhl之條件下測定開封強度（單位·· kgf/15 mm” 再者，試驗係以n=6進行，算出其平均值。 (密封強度） 如圖UB所示，將容器】之4邊切割成15 _寬度並作為 試驗樣品’自凸緣部之内側朝向外側（圖11B之箭頭方向） 使用自動立體測圖儀拉伸試驗機，於18〇。剝離、则 min之條件下測定密封強度（單位：“οι5 。再 者’試驗係以n=12進行，算出其最小值。 (内壓強度） 。乂〇.8 L/mln至L/min之範圍内之送風量對易開封性容 " 加壓二氣，測定該容器破裂時之壓力（單位： MPa) °再者’試驗係以n=5進行’ #出其平均值及最小 154804.doc -27- 201139225 值。 (開封外觀） 目視開封後之開封起始部之外觀進行評估。評估 一 以3個階段進行評估，即開封起始部之外觀整體良::: 體較差之情形為「差、本良好」、開封起始部之外觀整 -¾ I 〇 154804.doc 28· 201139225 【1<】 比較例3 LLDPE ο (Ν fN v§ 〇 00 ΓΝ (Ν «ο (Ν — 0.062 (0.040) 神1 比較例2 LLDPE Ο (S S 1 OS 00 ο (Ν 1 0.030 (0-020) 神1 比較例1 LLDPE 1 1 〇 »η ο so as d /-~N (Ν CN (Ν — Ο Ο ο 汝 實施例7 1_____ PP系樹脂 ο cs 曲面狀 CS 〇 00 >〇 00 cs 0.048 (0.041) 基本良好 實施例6 PP系樹脂 ο 宕 in m ο Ο £S (N 0.045 (0.035) 基本良好 實施例5 LLDPE ο CN 曲面狀 <s ο «ο 卜 ο w-> (N 0.034 (0.022) 實施例4 LLDPE 沄 但 § ο ν-> ν〇 Ο 00 cn (N 0.330 (0.022) * 實施例3 LLDPE g V0 牛 ο ΟΝ ν〇 Ο 〇 (N ο in Ο (Ν m Ο ο ο «ftlX 實施例2 LLDPE 牛 ο (Ν 00 ν〇 ο (N <N mm cn <Ν ο ο ο 實施例1 LLDPE Ο <Ν V0 «η ο ο ο CS 0.035 (0.024) 蓋材之密封層之材質 第2熱封時之密封溫度(單位：°C) 第2環狀密封盤之密封面之形狀 (Α/Β)之值 開封強度(平均值、單位：kgfa5mm) 密封強度(最小值、單位：kgC15mm) $ 柘 E a迴 (2贫 ·· ^ ί ε恶 開封外觀 ±1^ ·29· 154804.doc 201139225 由表1所不之結果可明確，形成有滿足下述數式（F1)中 所不之條件之樹脂積存部之易開封性容器（藉由實施例丄至 實施例7所得之易開封性容器)由於開封強度位於適度範圍 内’開封外觀亦良好，故瑞認可充分抑制開封時之毛鬚之 產生’並且同時具有高密封性及易開封性。又，藉由實施 例1至實施例7所得之易開封性容器由於密封強度及内壓強 度之平均值及最小值均足夠高，故確認可充分抑制密封強 度之不均。 特別是與蓋材之密封層之材質設為pp系樹脂之實施例 6、7相比，將蓋材之密封層之材質設為LLDPR實施例 1〜5可確認難以產生毛鬚，開封外觀為良好。 另一方面，於不進行第2熱封步驟之情形時（比較例1) ’ 當進行連續生產時，有密封強度不充分之情形。又於第 2熱封步驟中使用密封面之形狀為滾花之密封盤之情形時 (比較例2)，因滾花密封中之不規則壓痕而自樹脂積存部產 生毛鬚，開封起始部之開封外觀較差。進而，於第2熱封 步驟中過分壓扁樹脂積存部之情形時（比較例3)，即便將蓋 材之密封層之材質設為LLDPE,亦會自樹脂積存部產生毛 鬚，並且產生蓋材之分層（delaminati〇n)，開封起始部之開 封外觀較差。 # 【圖式簡單說明】 圖1A係表示本發明之第1實施形態中之易開封性容器之 圖’且係表示由蓋材密封之狀態之概略圖。 圖1B係表示本發明之第！實施形態中之易開封性容器之 】54804.doc •30- 201139225 圖，且係表示自開封起始部開封蓋材之狀態之概略圖。 圖2係表示本發明之第1實施形態中之易開封性容器之 封起始部附近之部分剖面圖。 圖3係表示本發明之第1實施形態中之第1熱封步驟 式圖。 模 圖4係表示於本發明之第丨實施形態中之第丨熱封步驟 中，將第1環狀密封盤按壓至凸緣部後之狀態之部分剖面 圖。 圖5係表示本發明之第1實施形態中之第1環狀密封盤 部分剖面圖。 圖6係表示於本發明之第丨實施形態中之第2熱封步驟 中，將第2環狀密封盤按壓至凸緣部後之狀態之部分剖面 圖。 圖7係表示本發明之第1實施形態中之易開封性容器經初 期開封之狀態的部分刮面圖。 圖8係表示本發明之第1實施形態中之易開封性容器經完 全開封之狀態的部分刮面圖。 圖9係表示本發明之第2實施形態中之易開封性容器經初 期開封之狀態的部分剖面圖。 —圖10係表示本發明之第2實施形態中之易開封性容器經 70全開封之狀態的部分剖面圖。 圖11A係表示於易開封性容器之評估試驗中提取開封 強度之評估用樣品之位置之模式圖。 圖11B係表示於易開封性容器之評估試驗中，提取密封 強度之"平估用才袠品之位置之模< Η。 154804.doc • 31 - 201139225 【主要元件符號說明】 1、1 a 易開封性容器 2 容器本體 3 蓋材 4 開封起始部 6 樹脂積存部 7 第1環狀密封盤 8 第2環狀密封盤 21 表面層 22 表面下層 23 基材層 24 開口部 25 凸緣部 26 > 261 ' 262 密封部 31 密封層 32 外層 61 、 62 ' 63 樹脂積存 71 傾斜面部 72 曲面部 73 前端 A 高度尺寸 B 寬度尺寸 R 第1¼狀在、封盤之内周 W 第1環狀密封盤7之寬J X 密封部之内周緣附近 154804.doc -32·Sealing temperature: 220 ° C 154804.doc • 26· 201139225 Sealing pressure '· 200 kg / sealing time: 1.2 seconds [evaluation of the easy-sealing container] About Example 1 to Example 7, and Comparative Example 1 The easy-opening container obtained in Comparative Example 3 was evaluated by the method shown below for the opening strength, the sealing strength, the inversion degree, and the opening of the opening at the time of opening, and the results obtained are shown in Table 1 (opening strength) as shown in the figure. ΠΑ, the corner of the container (opening portion) was cut into a width of μ mm and used as a test sample, and the sample was directed from the outer side of the flange portion (outside the flange portion) toward the inner side (the container body) On the side of the σ section) (the direction of the arrow in the figure ι} a), use an autostereoscopic tensile tester at 135. The peeling strength was measured under conditions of 3 〇〇mm/mhl (unit·············································· The four sides of the container were cut into 15 _ widths and used as the test sample 'from the inner side of the flange portion toward the outer side (the direction of the arrow in Fig. 11B) using an autostereograph tensile tester at 18 〇. The sealing strength was measured under the conditions (unit: "οι5. In addition, the test was performed with n=12, and the minimum value was calculated. (internal pressure strength). 送.8 L/mln to L/min. For the easy-opening capacity " pressurizing two gas, determine the pressure of the container when it ruptures (unit: MPa) ° and then 'test system with n=5' #出出平均平均和最小154400.doc -27- 201139225 (Opening appearance) Visually evaluate the appearance of the opening part after opening. The evaluation is evaluated in three stages, that is, the appearance of the opening part is good overall::: The poor condition is "poor, good" The appearance of the opening part of the opening is -3 I 〇 154804.doc 28· 201139225 [1< Comparative Example 3 LLDPE ο (Ν fN v§ 〇00 ΓΝ (Ν «ο (Ν — 0.062 (0.040) God 1 Comparative Example 2 LLDPE Ο (SS 1 OS 00 ο (Ν 1 0.030 (0-020) God 1 Comparison Example 1 LLDPE 1 1 〇»η ο so as d /-~N (Ν CN (Ν - Ο Ο ο 汝 Example 7 1_____ PP resin ο cs curved CS 〇 00 > 〇 00 cs 0.048 (0.041) Basic Good Example 6 PP-based resin ο 宕in m ο Ο £S (N 0.045 (0.035) Basically good example 5 LLDPE ο CN curved shape <s ο «ο ο w-> (N 0.034 (0.022) implementation Example 4 LLDPE 沄 § ο ν-> ν〇Ο 00 cn (N 0.330 (0.022) * Example 3 LLDPE g V0 牛ο ΟΝ ν〇Ο 〇 (N ο in Ο (Ν m Ο ο ο «ftlX implementation Example 2 LLDPE 牛ο (Ν 00 ν〇ο (N < N mm cn < Ν ο ο ο Example 1 LLDPE Ο < Ν V0 «η ο ο ο CS 0.035 (0.024) The material of the sealing layer of the cover material Sealing temperature at the time of the second heat sealing (unit: °C) The value of the sealing surface of the second annular sealing disk (Α/Β) The opening strength (average value, unit: kgfa5mm) Sealing strength (minimum, unit: kgC15mm) $ 柘E a back (2 poor ·· ^ ί ε 开 开 ± ± 1 ± ± ± ± ± ± ± ± ± 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 392 2011 392 392 392 392 392 392 392 392 392 392 392 392 392 392 392 392 392 392 392 392 The container (by the embodiment 丄 to the easy-opening container obtained in the embodiment 7) has a good appearance when the opening strength is within a proper range, and the sir is recognized to sufficiently suppress the generation of the hair when opening the package and at the same time has a high seal. Sexual and easy to open. Further, the easy-opening container obtained in the first to seventh embodiments was sufficiently high in the average value and the minimum value of the sealing strength and the internal pressure strength, and it was confirmed that the unevenness of the sealing strength can be sufficiently suppressed. In particular, in comparison with Examples 6 and 7 in which the material of the sealing layer of the lid member was pp-based resin, the material of the sealing layer of the lid member was set to LLDPR. In Examples 1 to 5, it was confirmed that hairiness was hard to be generated, and the appearance of the opening was good. On the other hand, when the second heat-sealing step was not carried out (Comparative Example 1)', when the continuous production was carried out, the sealing strength was insufficient. When the shape of the sealing surface is a knurled sealing disk in the second heat sealing step (Comparative Example 2), hair is generated from the resin reservoir due to irregular indentation in the knurled seal, and the opening of the opening is started. The opening of the ministry has a poor appearance. Further, when the resin reservoir is excessively crushed in the second heat sealing step (Comparative Example 3), even if the material of the sealing layer of the lid member is LLDPE, hair is generated from the resin reservoir and a cover is produced. The layering of the material (delaminati〇n), the opening of the opening part of the opening is poor. [Brief Description of the Drawings] Fig. 1A is a schematic view showing the state of the easy-opening container in the first embodiment of the present invention, and showing a state in which the lid member is sealed. Figure 1B shows the first aspect of the present invention! In the embodiment, the easy-opening container is 54804.doc • 30-201139225, and is a schematic view showing a state in which the lid member is opened from the opening portion of the opening. Fig. 2 is a partial cross-sectional view showing the vicinity of a sealing start portion of the easy-opening container in the first embodiment of the present invention. Fig. 3 is a view showing a first heat sealing step in the first embodiment of the present invention. Fig. 4 is a partial cross-sectional view showing a state in which the first annular sealing disk is pressed to the flange portion in the second heat sealing step in the third embodiment of the present invention. Fig. 5 is a cross-sectional view showing a portion of a first annular sealing disk in the first embodiment of the present invention. Fig. 6 is a partial cross-sectional view showing a state in which the second annular sealing disk is pressed to the flange portion in the second heat sealing step in the second embodiment of the present invention. Fig. 7 is a partial plan view showing a state in which the easy-opening container of the first embodiment of the present invention is initially opened. Fig. 8 is a partial plan view showing a state in which the easy-opening container of the first embodiment of the present invention is completely opened. Fig. 9 is a partial cross-sectional view showing a state in which the easy-opening container of the second embodiment of the present invention is initially opened. Fig. 10 is a partial cross-sectional view showing a state in which the easy-opening container of the second embodiment of the present invention is fully opened by 70. Fig. 11A is a schematic view showing the position at which the sample for evaluation of the unsealing strength is extracted in the evaluation test of the easy-opening container. Fig. 11B is a diagram showing the position of the seal strength in the evaluation test of the easy-opening container. 154804.doc • 31 - 201139225 [Description of main components] 1. 1 a easy-opening container 2 container body 3 cover material 4 unsealing start part 6 resin reservoir 7 first annular sealing disk 8 second annular sealing disk 21 surface layer 22 surface lower layer 23 base material layer 24 opening portion 25 flange portion 26 > 261 '262 sealing portion 31 sealing layer 32 outer layer 61, 62' 63 resin accumulation 71 inclined surface portion 72 curved surface portion 73 front end A height dimension B width The dimension R is 11⁄4 in the inner circumference of the sealing disk W. The inner circumference of the wide JX sealing portion of the first annular sealing disk 7 is 154804.doc -32·