201139127 六、發明說明： 【發明所屬之技術領域】 本發明係關於由紙漿材料所形成的容器，特別是食品 收納谷器的製造方法’詳細而言係關於工業性廉價地製造 即使魚等的血液等附著於容器，也能容易地以水予以沖洗 之紙漿材料製容器的方法。 〇 【先前技術】 作爲用來收容食品之便當盒或托盤等的食品收納容器 ’以往以來’使用發泡聚胺甲酸酯等的塑膠材料。但，塑 膠材料’其使用後的後後的處理並不容易，此，從環境保 護的觀點來看’被強力要求植物性纖維材料製食品收納容 器。 爲了解決這種問題，本案申請人開發出經由如圖1所 示這種由紙獎材料（紙漿或以紙漿爲主成分之植物性纖維 材料）形成厚紙狀物之製程、將具有熱封能之熱可塑性樹 脂塗佈於成爲內面之面的製程、及在前述厚紙狀物的四角 形成成爲側面片的切斷部之製程，將如此所獲得的厚紙狀 物以凹凸一對沖壓模具進行加熱沖壓，使得在四角具有側 面片之聚合部1的食品收納容器2，而先申請了專利（專利 文獻1 )。 由此紙漿材料所構成的容器係能廉價地形成，並且從 環保觀點來看獲得極高的評價。但，當置入魚等時，會有 血液等附著於容器底面之情況，這樣的容器，由於容器的 -5- 201139127 外面未以熱可塑性樹脂進行塗佈，因此，即使以水加以清 洗也不會掉落，故會有外觀變髒之問題產生。 以熱可塑性樹脂將容器的內外兩面予以塗佈即可，但 ，此方式會有容器附著於加熱的凹模而變得無法取下之問 題產生。因此’以往以來，是考量無法以模具製造兩面塗 佈之紙製食品容器。 又’厚紙狀物的一方的對向面，由於先起立，故，載 承於支承構件後再進行加熱沖壓，但雖然在可使支承構件 密接於模具之情況不會有問題，但當必須與模具稍微分離 的情況，則會有在凸緣部（鍔部）5的四角產生皴紋或貼 附不良之問題產生。 且，如圖1所示’在形成有由以容器上端開口周緣部 朝外側上升傾斜的方式折彎之上升傾斜部3、及將其前端 朝下方折彎的下降傾斜部4所構成的凸緣部（鍔部）5之情 況，會產生一方的下降傾斜部4打開而無法圓滑地折彎之 問題。即，會產生圖1之相對向的短側面片之凸緣部的角 度較長側面片的凸緣部的角度打開成更大之問題。特別是 在製造雙面塗佈之容器之情況時，會產生大的差。 〔專利文獻1〕日本特開2006-315687 【發明內容】 〔發明所欲解決之課題〕 本發明中之請求項1所記載的發明的目的係在於即使 在由以紙漿材料構成的厚紙狀物所形成之紙漿材料製容器 -6- 201139127 ’收谷魚# ’造成血附著於外面，也 落之紙漿材料製容器的製造方法。這 在以往的技術中完全未被揭示。 又’請求項9所記載的發明，除 供即使在無法使支承構件與模具密接 在凸緣部（鍔部）5也不會產生不良 的製造方法爲其另一目的。 〇 且’請求項11所記載的發明，其 上端開口周緣部朝外側折彎，進一步 凸緣部（鍔部）可常時折彎成略同角 的製造方法。 〔用以解決課題之手段〕 爲了達到上述目的，本發明者精 於將凹模具加熱成塗佈於紙槳材料製 〇 的軟化溫度即可，而想到在對四角噴 之方法。但，在此方法，也因在形成 )5之容器的情況，若不施加高溫則 部（鍔部），所以，即使將凹模具加 軟化溫度以下，也在多數次成形中， 著於凹模具。因此，發現使冷卻液體 凹模具內壁內的通路，將模具以常時 的軟化溫度以下的方式加以冷卻，即 鍔部）5之容器，也不會附著於凹模 能容易以水洗讓其掉 樣的紙漿材料製容器 了上述目的外，亦提 或近接配置之情況， 品之紙漿材料製容器 目的係在於提供容器 將前端朝下方折彎之 度之紙漿材料製容器 心硏究的結果，著眼 容器之熱可塑性樹脂 吹熱風後再予以沖壓 有前述凸緣部（鍔部 無法圓滑地形成凸緣 熱至熱可塑性樹脂的 模具的溫度上升而附 (理想爲水）循環於 維持於熱可塑性樹脂 ί吏在形成有凸緣部（ 具之驚人事實，進而 201139127 完成了請求項1所記載的本發明。 又，想到在紙具有與纖維相同的抄紙方向線，發現朝 與抄紙方向線相同方向則容易地折彎，而朝與抄紙方向線 交叉的方向折彎時則需要力，進而發現在與抄紙方向線交 叉並折彎之情況，藉由加成更高的溫度變得容易折彎，可 常時全體性地折彎成略同角度，而開發了請求項1 1所記載 的本發明。 即，本發明係自紙漿材料形成厚紙狀物，在該厚紙狀 物的表裏兩面塗佈具有熱封能之熱可塑性樹脂，在前述厚 紙狀物的四角形成用來形成側面片的切斷部，或形成用以 將鄰接的側面片連結之折入片，將如此所獲得的厚紙狀物 ，使相對向的一方的側面片以抵接於側面片裏面之支承構 件予以支承，再以一對沖壓模具予以加熱沖壓，將容器開 口周緣部朝外側折彎，再將其前端部朝容器的下方折彎後 進行加熱黏貼之紙漿材料製容器的製造方法，其特徵爲， 凹模具係加熱成熱可塑性樹脂的軟化溫度以下，對成爲前 述容器之前端（朝上下方向進行沖壓之情況時的上端）之 四角噴吹熱風，再將凹模具冷卻，讓凹模具維持在熱可塑 性樹脂的軟化溫度以下。冷卻係藉由對凹模具的壁內導入 冷卻用的液體爲佳（請求項2 )。 形成有前述折入片之厚紙狀物，係適用於形成容器， 即，以一對沖壓模具進行加熱沖壓，前述折入片聚合於前 述側面片，再將容器開口周緣部朝外側折彎，將其前端部 朝容器的下方折彎後，再將角部予以加熱黏貼（請求項3 -8- 201139127 若藉由將前述容器開口周緣朝外側折彎，再將其前端 朝下方折彎來形成凸緣部，則強度會變強，因此，即使聚 合薄膜，容器也變得不易變形。 前述折入片係適用於以下情況，即，與底面角接觸的 部分形成爲角部，而該前述折入片的上方形成爲缺口部（ 請求項4 )。折入片係作成爲V字狀或三角形狀爲佳。 〇 容器開口周緣折彎部係對下述情況極具效果，即，在 折入片與側面片聚合之狀態下，形成爲將上端部在較前述 折入片更上方朝外側折彎，進一步將前端朝下方折彎之形 狀（請求項5)。 前述熱可塑性樹脂爲聚乙烯，前述凹模具的溫度係作 成爲5 5 °C〜65 °C爲佳，而冷卻用的液體，理想爲水、常時 維持在此溫度爲佳（請求項6 )。特別是在此溫度範圍下 ，可有效地防止附著。當溫度過高時則容器會附著於凹模 〇 ，而當過低時角無法圓滑地進行黏貼。 前述熱風的溫度，理想爲1 60〜22 0 °c，特別理想爲 180〜200 °C，將其自細長的管及/或模具的四角的熱風噴 出孔噴吹爲佳（請求項7 )。前述凸模具的溫度，理想爲 1 7 0 ~ 1 9 0 °C 。 前述容器可理想作成爲托盤，即，構成爲在將內容物 收容於容器後，聚合薄膜，藉以覆蓋開口部與容器開口周 緣折彎部上面者（請求項8 )。 前述支承構件係朝凹模具前端之一方的對向面突出， -9 - 201139127 當凸模具沖壓凹模具時’抗衡彈性體的力而移動’當使沖 壓後凸模具移動時’則以彈性體的力回復到原來的位置爲 佳（請求項9 )。 前述支承構件係爲桿’該桿係爲複數支’分別設置於 凹模具前端（朝上下進行沖壓時的凹模具上端）之一方的 相對向的面爲佳（請求項1 0 )。前述桿’理想爲位於四角 的角部附近。 將朝與抄紙方向線方向交叉之方向折返容器開口周緣 部之部分的凹模具的前端之環狀凸部加熱成較朝抄紙方向 線方向折返的周緣部更高之溫度（請求項11 )。前述前端 環狀凸部係作成爲較其他部分高5〜1 0 °C左右的溫度爲佳 〇 前述容器開口周緣部朝外側折彎，藉由將其前端朝容 器的下方折彎來形成凸緣部，再將該凸緣部之朝容器的下 方折彎之部分的凹模具前端之環狀凸部加熱爲佳（請求項 12) ° 〔發明效果〕 若依據本發明中之請求項1所記載的發明，能夠以模 具容易地製造以往無法以模具能製造之由以熱可塑性樹脂 進行雙面塗佈之紙漿材料所構成之容器。因此，即使血液 附著於此容器的外面’也能夠以水洗容易使其掉落，因此 ’能毫無問題地使用來作爲用來收容魚等之容器。 又’若依據請求項9所記載的發明，除了上述效果， -10 - 201139127 並且因當設置成當將支承構件按壓於模具上時則移動，而 當解除按壓時則回復到原來的位置，所以，能夠消除在凸 緣部（鍔部）的四角產生皴紋等引起黏貼不良之問題。 且，若依據請求項11所記載的發明，除了上述效果， 並且將與抄紙方向線方向交叉而折彎之部分的模具的環狀 凸部予以加熱，使得容易折彎厚紙狀物，藉此能夠製造凸 緣部全體常時以略同角度圓滑地折彎之紙漿材料製容器。 C) 本發明的容器，特別是可理想作爲食品收容容器（請求項 12)。 【實施方式】 其次，說明本發明的實施形態。 爲了由紙漿材料（包含紙漿與植物性纖維材料之混合 物）製造厚紙狀物，藉由習知的方法來進行即可。即，將 讓紙漿材料懸浮於水中者，經過抄紙製程、去水製程及乾 Ο 燥製程，作成爲厚紙狀物即可。對厚紙狀物的表裏面之一 方或雙方塗佈具有熱封能之熱可塑性樹脂，切斷成欲形成 的容器的展開形狀。再將其以凹凸之一對沖壓模具予以加 熱沖壓即使。爲了以沖壓模具進行沖壓，必須使相對向的 一方的側面片先起立。再者，厚紙狀物係含有耐水劑者爲 佳。再者，亦可使用由舊報紙這樣的舊紙所製造的紙漿來 代替初生（virgin)紙漿。 在本發明，作爲與紙漿一同使用的植物性纖維材料， 能夠使用竹子、蘆葦、甘蔗或洋麻，但在單獨使用初生紙 -11 - 201139127 槳、初生紙漿與竹材之混合物或舊紙之紙漿材料的情況， 從強度與衛生面之觀點使用初生紙漿爲佳，而從價格的觀 點，使用初生紙漿與竹材之混合物及舊紙爲佳。 塗佈具有熱封能之熱可塑性樹脂的製程，在切斷成展 開形狀之前或之後進行皆可。熱可塑性樹脂係對厚紙狀物 的表面與裏面雙方塗佈。塗佈熱可塑性樹脂，是由於能以 模具形成爲容器，並且可防止水分、血液、液汁等侵入， 若僅塗佈內面，則魚等的血液附著於外面之情況，則無法 以水洗落。作爲熱可塑性樹脂，特別是使用聚乙烯或聚丙 烯爲佳。 在將厚紙狀物沖壓成容器的展開形狀的同時（或在之 後），將一方的相對向的側面片（理想爲較短之側面片） 製作有若干上升之折痕爲佳，但即使不製作折痕也不會有 問題。 如此所形成的厚紙狀物是如圖2所示，在四角形成有 用來在凸緣部（鍔部）圓滑地形成容器開口周緣部之缺口 部6。 缺口部6位在側面片7與8及8與7’之間’形成有短少缺 口部6的量之V字形的折入片9。即，折入片9的上方形成爲 缺口部6。在折入片9兩側及底面與側面之境界形成折痕爲 佳。折痕係藉由沖壓用模具來形成爲佳，但即使不形成也 不會有問題產生。折入片9係與底面角接觸的部分呈銳角 的形狀即可，但作成爲三角形狀（V字狀）爲佳。銳角的 角度’在此實施例爲10〜20度，特別是Μ度〜16度爲佳’ -12- 201139127 依據容器的用途，能使側壁進一步起立，所以1 〇〜3 0度左 右爲佳。 圖3及圖4係顯示使用於本發明之模具的一例，厚紙狀 物的先起立之兩側面片（作成爲相對向的短邊爲佳）係被 支承於自由出沒的桿1 〇，1 〇 ’上。桿1 0，1 0 ’係與形成在凹 模具（母模具）11之孔（空洞）嵌合，而在孔內可上下移 動。桿10，10’始終由凹模具11上端突出15〜30mm左右爲 0 佳。孔，理想爲直徑3〜1 〇mm，特別理想爲3〜7mm。桿1 0 之前端係呈斜面且形成爲斷面四角形。斷面亦可爲多角形 ，亦可爲圓形均可。 桿10，10’下端係被固定於已固定在線圈彈簧13上端 的圓板。因此，當桿1 〇，1 0 ’被凸模具1 2按壓時，抗衡線 圏彈簧1 3的力而下降，當解除按壓時，藉由線圏彈簧1 3的 力，上升回復到原來的位置。 支承構件，不僅可爲桿，亦可爲將板體抗衡彈簧的力 Ο 而移動，藉由彈簧的力而回復到原來的位置。又，亦可將 板體傾斜設置於凹模具（母模具）1 1，藉由按壓使得形成 爲與凹模具相同，當解除按壓時，藉由彈簧的力回復到原 來的位置。 在母模具1 1的凹部1 4周緣部上端外周，因形成有環狀 凸條1 7，該凸條1 7是母模具凹部周緣部由朝外側上升傾斜 之上升傾斜部1 5與自上升傾斜部1 5前端下降之下降傾斜部 1 6所形成且大致呈山形，所以，如圖5所示，能夠在一製 程形成容器的同時，將四角加以熱封，製造具有由開口部 -13- 201139127 周緣部朝外側之上升傾斜部3和其前端部下降的下降傾斜 部4之山形形狀的鍔狀部5之紙漿材料製容器2。再者’亦 可爲上升傾斜部3及下降傾斜部4呈圓弧狀，形成半圓狀的 鍔狀部5。 如圖3及圖4所示，在與抄紙方向線方向交叉（略正交 )之母模具的環狀凸條17附近的母模具側面上端，固定有 加熱板1 8。藉由此加熱板1 8，將前述下降傾斜部1 6予以加 熱。加熱係作成爲較凹模具的溫度更高即可。加熱至高出 5〜15C左右爲佳。 因本發明係形成雙面塗佈之容器，所以必須加熱至熱 可塑性樹脂的軟化溫度以下。因此，凹模具及前述下降傾 斜部1 6會冷卻至軟化溫度以下。 在此實施例，因使用聚乙烯，所以作成爲聚乙烯之軟 化溫度80 °C以下。若將凹模具的溫度作成爲50〜65 °C，則 前述下降傾斜部16理想爲65〜75°C即可。在前述實施例， 使用了加熱板，但，亦可將加熱器這樣的熱源埋設於母模 具’讓前述下降傾斜部成爲預定的溫度。在前述實施例， 模具的長度方向係作成爲抄紙方向線方向。再者，因應紙 漿材料製容器的尺寸及使用目的，亦可不使用加熱板。 如圖3及圖4所不’隔者母模具11立設著壁19，19’。 壁1 9與1 9 ’之間形成爲與厚紙狀物的寬度相同。使厚紙狀 物被溜滑梯狀的斜坡所導引而掉落至母模具上，被壁1 9與 19 ’夾持而藉由前方之壁20讓其停止。壁19，19，，20係發 揮定位之功能，在此狀態下進行沖壓。 14- 201139127 藉由將厚紙狀物之對向之一方的側面片載承於抵接在 側面片裏面之支承構件（桿）1 0，1 0 ’上，使其先起立， 再藉由一對沖壓模具11，12進行加熱沖壓，讓前述折入片 9重合黏貼於前述側面片7，7’，容器開口部周緣部進行加 熱黏貼，形成由上升傾斜部3與下降傾斜部4所構成之凸緣 部5，藉以製造紙漿材料製容器。此時，支承構件1 0，1 0 ’ 係當以凸模具1 2與凹模具1 1進行沖壓時，抗衡彈性體1 3的 〇 力而下降，在沖壓後，當使凸模具12上升時，則以彈性體 1 3的力，上升回復到原來的位置。 在將凹模具11與凸模具12配置於左右方向，進行沖壓 之情況，支承構件10係抗衡彈性體13的力而朝橫方向移動 ，當使凸模具1 2移動時，則以彈性體1 3的力，回復到原來 的位置。 當將如圖2所示的厚紙狀物以凹凸模具進行沖壓，並 使其重合黏貼，將再將較V字形的片9更上方的部分折返時 ϋ ，經過如圖6的狀態，如圖5所示，容器開口周緣部能夠容 易形成由外側上升傾斜部3與自該傾斜部下降的下降傾斜 部4所構成之斷面略山形的凸緣部（鍔狀部）5。當增長V 字形的折入片9，與V字形的折入片9一同折返時，則成爲 折返呈三層之部分，故會產生在角部發生皴紋或破裂之情 況，無法形成完整之鍔狀部5。如圖6所示，較短之V字形 的折入片9黏貼於側壁7 ’的表面Α。 圖8係顯示使用於本發明之模具的其他例，厚紙狀物 2 1的先起立之兩側面片（作爲相對向的短邊爲佳）係以可 -15- 201139127 出没之桿1 0，1 0，予以支承。桿1 0，1 ο，係可在形成於凹模 具（母模具）11’之孔內上下移動。 因如前述的方式所構成，所，當桿1 〇，1 〇 ’被凸模具 (公模具）1 2按壓時，則桿1 0，1 0 ’抗衡彈簧1 3的力而下 降，當使凸模具12上升時，則藉由彈簧13的力，回復到原 來的位置。 支承構件（桿）1 〇，1 0 ’係設置成僅可在凹模具11的 孔內上下移動即可，但，因製造雙面塗佈之容器，所以需 將凹模具11加熱至55〜65 °C左右，當對容器的角噴吹熱風 而連續地沖壓時，母模具的溫度會變高，造成容器黏貼至 母模具，如圖1 1及圖1 2所示，需要將母模具予以冷卻，因 此，在凹模具側壁內形成用來使冷卻用的水循環之通路28 。冷卻係維持5 5〜65 °C左右即可。因此，支承構件（桿） 10需要設置成爲不會阻礙此通路28。 前述模具係如圖4所示，使用在母模具的凹部上端外 周設有斷面略山形的環狀凸條1 7之模具，所以能在一製程 ，形成容器的同時，將四角加以熱封，製造具有斷面略山 形的鍔狀部之紙漿材料製容器。在圖7，因使用設有斷面 略四角形的環狀凸條之模具，所以形成爲具有斷面u字形 的鍔狀部1 2 ’之紙漿材料製容器。 爲了以凹凸一對加熱沖壓模具來形成紙漿材料製容器 ，而將厚紙狀物載置於如圖3及圖4所示的母模具（凹模具 )1 1。一方的相對向的側面片係被支承於桿1 〇 , 1 〇 ’上。 在前述實施例，使用桿1 〇，1 〇 ’作爲支承構件。桿1〇 -16- 201139127 ，10’係如圖3及圖4所示，嵌合於四角的角部附近之凹模 具的孔。角部附近，理想爲自較角黏貼部（聚合部）長 5 mm的位置〜側面片的長度之1/4左右的位置。 桿若與短的兩側面片相對向設置的情況，則各2支即 可，但，在容器大型之情況，亦可進一步在中間加設1支 。由於設置於短的側面片，容易舉起故極爲理想。 亦可採用板體代替桿，將板體按壓於相對向的面，抗 〇 衡彈簧的力而下降，當解除時，藉由彈簧的力上升的方式 ，與設置於凹模具之細長的孔嵌合。板體的長度，理想爲 側面片的長度之1/3以上、且較角黏貼部（聚合部）長5mm 左右的長度。 支承構件，亦可使用板體代替桿，將板體抗衡彈簧的 力而下降（移動），藉由彈簧的力，回復到原來的位置。 又，亦可將板體傾斜設置於凹模具（母模具），藉由按壓 而下降（移動），形成爲與凹模具相同平面，當解除按壓 時，藉由彈簧的力，回復到原來的位置。又，亦可將板體 設置成可傾倒、起立。 支承構件係設置於模具上爲佳，但在可與凹模具的兩 側部接觸或接近而設置之情況，則不需特別設置於模具上 。又，在此情況，由於不會造成模具的沖壓之阻礙，故也 不需要上下移動。 在前述實施例，使用線圈彈簧作爲彈性體，但若爲可 藉由按壓’抗衡彈性體的力而下降，當解除按壓時則藉由 彈性體的力，回復到原來的位置者，則無論何種彈性體皆 -17- 201139127 可，未被特別限制。 圖10係顯示製造本發明的以聚乙烯進 器之一例者，在厚紙狀物的四角形成有朝 面對該缺口部6，形成V字形的折入片9。i 方部分形成缺口部6。 細長的加熱氣體噴出管25位在與缺匚 理想爲自垂直傾斜1 5〜4 5度）相對向的 180〜2 00°C之加熱氣體。在加熱氣體噴出 熱器內裝管26，壓縮空氣27通過加熱器 180〜20(TC自加熱氣體噴出管25噴出。當 過低時會產生黏貼不良，而當過高時則會 在前述實施例，始終噴出加熱氣體， 地控制，僅在進行沖壓時噴出加熱氣體。 加熱氣體噴出管25係形成爲可自由屈 大小，可自由地調整噴射位置及方向。 亦可使細長的加熱氣體噴出管位在身 方（理想爲自垂直傾斜1 5〜4 5度傾斜）的 氣體。亦可自斜上方與斜下方雙方噴出加 況，當由斜下方噴出氣體之情況，亦可作 使用。 亦可如圖8所示，在凹模具（或凸模 小孔（直徑1 mm左右）（熱風噴出孔）， 22而形成的加熱氣體通路之加熱氣體，自 可倂用來自於斜上方或/及斜下方之加熱 行雙面塗佈之容 田長的缺口部6， 印，折入片9之上 ]部6的斜上方（ 位置，始終噴出 管25，連設有加 ’溫度控制成以 加熱氣體的溫度 產生燒焦。 但亦可進行斷續 曲，因應容器的 骂缺口部6的斜下 位置，噴出加熱 熱氣體。在此情 爲冷卻的目的來 具）的四角穿設 將通過了埋設管 該小孔噴出。亦 氣體的噴出、和 18- 201139127 來自於模具之加熱氣體的噴出。圖中之圖號23係爲將加熱 氣體導入至通路22的管，嵌合於管22。 凹模具係如圖1 1及圖1 2所示，水循環於循環通路2 8， 讓模具溫度成爲55 °C〜65 t。當處於此溫度範圍時，能夠 有效地防止已成形之容器附著至模具，並且能夠將角予以 圓滑地黏貼。當溫度過低時，則會產生黏貼不良，而當過 高時則已成形之容器會附著於模具。 〇 沖壓之凸模具的溫度係在180°c前後進行，但以170〜 1 90 °C進行爲佳。當過低時，則會產生角部之黏貼不良品 ，而當過高時，則會產生燒焦等的紙之變質。 在前述實施例，顯示了以凹凸模具朝上下方向進行沖 壓之例子，但亦可將凹凸模具配置成朝左右方向進行沖壓 ，使厚紙狀物自上方落下至凹凸模具之間，再朝橫方向進 行沖壓。 圖9係顯示聚乙烯雙面塗佈之厚紙狀物的其他例子’ 〇 在四角形成有用來形成側面片之切斷部29 ’使較短的側面 片8，8 ’先起立，再以凹凸模具進行沖壓’讓鄰接之側面 片8與7及7’、8’與7及7’聚合，然後與前述同樣地進行折返 ，藉此能夠形成具有凸緣部（鍔狀部）之容器。 作爲藉由本發明的方法所製造的紙漿材料製容器，未 被特別限制，但作爲理想者，可舉出用來收容魚等之托盤 、便當盒、納豆容器等的食品容器、用來種植植物之花盆 等的這樣的容器。 -19 - 201139127 〔產業上的利用可能性〕 藉由使用本發明的製造方法，能夠以模具容易地製造 在以往無法以模具製造之熱可塑性樹脂進行雙面塗佈之由 紙漿材料所構成的容器。因此，本發明的容器即使在受到 血液等所沾污之切菜板’也能以水將所附著之血液清洗掉 落’能夠理想地使用來作爲收容魚等用之托盤，因此，能 夠期待替換以往的塑膠容器，作爲防止地球溫暖化之目的 上來使用。 【圖式簡單說明】 圖1係顯示以往的食品收容容器的一例之斜視圖。 圖2係藉由本發明所製造之食品容器的原料厚紙狀物 的一部平面圖。圖爲容器的一部分展開圖。 圖3係使用於本發明之凹模具的平面圖。 圖4係使用於本發明之凹模具及凸模具的斷面圖。 圖5係顯示經過圖6的狀態，成形爲本發明的食品收容 容器之狀態的部分斜視圖。 圖6係表示藉由本發明所製造的食品容器的一例的一 部分的展開圖。 圖7係顯示藉由本發明方法所製造的食品容器的其他 例子之部分斜視圖。 圖8係顯示藉由本發明方法之模具製造食品收容容器 的例子之斷面圖。 圖9係顯示本發明的原料厚紙狀物的其他例子之平面 -20- 201139127 圖。圖爲容器的展開圖。 圖1 〇係顯示本發明的食品收容容器的製造法之槪略平 面圖。 圖1 1係使用於本發明之模具的槪略斷面圖。 圖1 2係使用於本發明之模具的槪略平面圖。 【主要元件符號說明】 〇 1 :側面片的聚合部 2 :食品收用容器 5 :容器的凸緣部（鍔部） 6 :缺口部 7，7 ’，8 :側面片 9 :折入片 1 0，1 0 ’ ：桿（厚紙狀物支承構件） 1 1 :凹模具（母模具） ΰ 12 :凸模具（公模具） 13 :線圈彈簧 1 7 :環狀凸條 1 8 :加熱板 19 ， 19’ ， 20 :壁 2 5 :加熱氣體噴出管 28 :液體（水）循環之通路 -21 -[Technical Field] The present invention relates to a container formed of a pulp material, in particular, a method for producing a food storage barn, which is detailed about industrially inexpensive production of blood such as fish. A method of making a container of pulp material which can be easily washed with water, etc., attached to a container.先前 [Prior Art] A food storage container such as a lunch box or a tray for accommodating foods has been conventionally used as a plastic material such as foamed polyurethane. However, it is not easy to handle the plastic material after the use of the plastic material. From the viewpoint of environmental protection, a food storage container made of a plant fiber material is strongly required. In order to solve this problem, the applicant of the present invention developed a process for forming a thick paper by a paper-based material (pulp or a vegetable fiber material mainly composed of pulp) as shown in FIG. The thermoplastic resin is applied to the surface of the inner surface, and the process of forming the cut portion of the side sheet at the four corners of the thick paper material, and the thick paper material thus obtained is heated and pressed by a pair of concave and convex stamping dies. In the food storage container 2 having the polymer portion 1 of the side sheet at the four corners, a patent is filed first (Patent Document 1). The container made of the pulp material can be formed inexpensively, and an extremely high evaluation is obtained from the viewpoint of environmental protection. However, when fish or the like is placed, there is a case where blood or the like adheres to the bottom surface of the container. Such a container is not coated with a thermoplastic resin on the outside of the container -5-201139127, and therefore, even if it is washed with water, Will fall, so there will be problems with the appearance of dirty. The inner and outer surfaces of the container may be coated with a thermoplastic resin. However, in this manner, there is a problem that the container adheres to the heated concave mold and becomes unremovable. Therefore, in the past, it has been considered that a paper-made food container which cannot be coated on both sides by a mold can be considered. Further, since the opposite side of the thick paper is lifted up first, it is carried by the support member and then heated and pressed. However, there is no problem in that the support member can be closely attached to the mold, but it is necessary to When the mold is slightly separated, there is a problem in that the ridges or the attachment defects occur at the four corners of the flange portion (the crotch portion) 5. Further, as shown in Fig. 1, a flange formed by a rising inclined portion 3 which is bent upward from the peripheral edge portion of the upper end of the container, and a downward inclined portion 4 which is bent downward at the front end thereof are formed. In the case of the portion (the crotch portion) 5, there is a problem that one of the descending inclined portions 4 is opened and cannot be smoothly bent. That is, there is a problem that the angle of the flange portion of the longer side piece of the opposite short side piece of Fig. 1 is opened to be larger. Especially in the case of manufacturing a double-coated container, a large difference is generated. [Patent Document 1] JP-A-2006-315687 [Problem to be Solved by the Invention] The object of the invention described in claim 1 is that the paper is made of a thick paper material composed of a pulp material. Container for pulp material formed -6- 201139127 '收谷鱼# 'The method of manufacturing a container made of pulp material that causes blood to adhere to the outside. This has not been revealed at all in the prior art. Further, the invention according to claim 9 is another object of the manufacturing method which does not cause a problem even if the support member and the mold are not in close contact with each other in the flange portion (the crotch portion). In the invention according to claim 11, the peripheral portion of the upper end opening is bent outward, and the flange portion (the crotch portion) can be bent at a substantially same angle. [Means for Solving the Problem] In order to achieve the above object, the inventors of the present invention have been conceivable in heating a concave mold to a softening temperature applied to a paper pulp material, and a method of spraying the four corners is conceivable. However, in this method, in the case of forming the container of 5, if the high temperature is not applied, the portion (the crotch portion) is applied. Therefore, even if the concave mold is added to the softening temperature or lower, the concave mold is applied in the majority of the molding. . Therefore, it has been found that the passage of the cooling liquid in the inner wall of the concave mold is cooled by the mold at a constant softening temperature or lower, that is, the container of the crotch portion 5 is not attached to the die and can be easily washed with water to make it fall. The pulp material container has the above-mentioned purpose, and is also referred to as a close-to-close arrangement. The purpose of the pulp material container is to provide a result of the container material of the pulp material which is bent to the lower end of the container, and the container is focused on the container. After the hot plastic resin is blown with hot air, the flange portion is punched (the temperature at which the flange portion cannot smoothly form the flange heat to the thermoplastic resin is increased, and the attached (ideally water) is circulated to be maintained in the thermoplastic resin. In the case where the flange portion is formed, the present invention described in claim 1 is completed in 201139127. It is also thought that the paper has the same papermaking direction line as the fiber, and it is found that it is easy to be in the same direction as the papermaking direction line. Bending, and when bending in the direction crossing the papermaking direction line, it is necessary to find that it is crossed and bent in the direction of the papermaking direction. The present invention described in claim 1 is developed by adding a higher temperature to become easily bent, and can be bent at substantially the same angle. Thus, the present invention is formed from a pulp material. a thick paper having a heat-sealable thermoplastic resin coated on both sides of the thick paper, forming a cut portion for forming the side sheet at the four corners of the thick paper, or forming an adjacent side sheet The folded piece is joined, and the thick paper thus obtained is supported so that the opposite side piece is supported by the supporting member abutting against the side piece, and then heated by a pair of punching dies to open the periphery of the container. a method for producing a pulp material container in which the front end portion is bent outward, and the front end portion is bent toward the lower side of the container, and the concave mold is heated to a softening temperature of the thermoplastic resin or less. The hot air is blown at the four corners of the front end of the container (the upper end when punching in the up and down direction), and then the concave mold is cooled to maintain the concave mold in the softening of the thermoplastic resin. The temperature is below. The cooling is preferably carried out by introducing a liquid for cooling into the wall of the concave mold (Requirement 2). The thick paper formed with the aforementioned folded sheet is suitable for forming a container, that is, a pair of stamping dies The hot stamping is performed, and the folded sheet is polymerized on the side sheet, and the peripheral edge portion of the container opening is bent outward, and the front end portion is bent toward the lower side of the container, and then the corner portion is heated and pasted (request item 3-8) - 201139127 When the flange of the container opening is bent outward and the front end is bent downward to form the flange portion, the strength is increased. Therefore, even if the film is polymerized, the container is less likely to be deformed. The lining system is applied to a case where a portion in contact with the bottom corner is formed as a corner portion, and a portion above the gusset sheet is formed as a notch portion (request item 4). The entangled sheet is formed into a V shape or a triangle. The shape of the 〇 container opening peripheral bending portion is extremely effective in that the upper end portion is folded outward from the upper side of the folding piece in a state where the folding piece and the side piece are polymerized. bend, Further, the front end is bent downward (request item 5). The thermoplastic resin is polyethylene, and the temperature of the concave mold is preferably from 5 5 ° C to 65 ° C, and the liquid for cooling is preferably water and is preferably maintained at this temperature (Requirement 6). Especially in this temperature range, adhesion can be effectively prevented. When the temperature is too high, the container will adhere to the die 〇, and when it is too low, the angle will not be smoothly applied. The temperature of the hot air is preferably from 1 60 to 22 ° C, particularly preferably from 180 to 200 ° C, and is preferably blown from the hot air ejection holes of the four corners of the elongated tube and/or the mold (claim 7). The temperature of the aforementioned convex mold is desirably 1 to 70 to 19 0 °C. The container may desirably be a tray, that is, a structure in which the film is polymerized after the contents are accommodated in the container, thereby covering the opening portion and the periphery of the container opening bent portion (request item 8). The support member protrudes toward the opposite side of the front end of the concave mold, -9 - 201139127 when the convex mold punches the concave mold, 'moves against the force of the elastic body' when moving the stamped convex mold, then the elastic body It is better to return to the original position (request item 9). It is preferable that the support member is a pair of rods which have a plurality of rods which are provided at one end of the concave mold (the upper end of the concave mold when punching up and down) (request item 10). The aforementioned rods are desirably located near the corners of the four corners. The annular convex portion at the tip end of the concave mold which is folded back toward the peripheral edge portion of the container opening in the direction intersecting with the papermaking direction is heated to a temperature higher than the peripheral portion which is folded back in the direction of the papermaking direction (request item 11). The front end annular convex portion is formed to have a temperature of about 5 to 10 ° C higher than the other portions. Preferably, the peripheral edge portion of the container opening is bent outward, and the front end is bent toward the lower side of the container to form a flange. Further, it is preferable to heat the annular convex portion at the tip end of the concave die which is bent toward the lower side of the container (Required item 12). [Effect of the invention] According to the claim 1 of the present invention According to the invention, it is possible to easily manufacture a container made of a pulp material which can be produced by a mold and which can be double-coated with a thermoplastic resin, which can be manufactured by a mold. Therefore, even if the blood adheres to the outer surface of the container, it can be easily washed with water, so that it can be used as a container for accommodating fish or the like without any problem. Further, according to the invention described in the claim 9, in addition to the above effects, -10 - 201139127 is also provided to move when the support member is pressed against the mold, and to return to the original position when the pressing is released, It is possible to eliminate the problem that the adhesion is caused by creases or the like at the four corners of the flange portion (the crotch portion). According to the invention of claim 11, in addition to the above-described effects, the annular convex portion of the mold which is bent at the portion intersecting with the direction of the papermaking direction is heated, so that it is easy to bend the thick paper. A container made of a pulp material which is always bent at a slight angle at the same angle as the whole of the flange portion is manufactured. C) The container of the present invention is particularly desirable as a food storage container (request item 12). [Embodiment] Next, an embodiment of the present invention will be described. In order to produce a thick paper from a pulp material (including a mixture of pulp and vegetable fiber material), it can be carried out by a conventional method. That is, the pulp material is suspended in the water, and the papermaking process, the water removal process, and the dry drying process are carried out to form a thick paper. A thermoplastic resin having heat-sealable energy is applied to one or both of the inside of the thick paper sheet to be cut into the developed shape of the container to be formed. Then, the stamping die is heated and stamped by one of the concavities and convexities. In order to press with a stamping die, it is necessary to raise the opposing side sheets first. Further, it is preferable that the thick paper is a water-resistant agent. Further, it is also possible to use a pulp made of old paper such as an old newspaper instead of virgin pulp. In the present invention, as the vegetable fiber material used together with the pulp, bamboo, reed, sugar cane or kenaf can be used, but the nascent paper-11 - 201139127 paddle, the mixture of nascent pulp and bamboo or the pulp material of the old paper is used alone. In the case of virgin pulp from the viewpoint of strength and hygiene, it is preferable to use a mixture of nascent pulp and bamboo and old paper from the viewpoint of price. The process of applying the heat-sealable thermoplastic resin may be carried out before or after cutting into the expanded shape. The thermoplastic resin is applied to both the surface and the inside of the thick paper. When the thermoplastic resin is applied, it can be formed into a container by a mold, and moisture, blood, liquid juice, or the like can be prevented from entering. If only the inner surface is applied, if blood such as fish adheres to the outside, it cannot be washed with water. As the thermoplastic resin, polyethylene or polypropylene is particularly preferred. While pressing the thick paper into the unfolded shape of the container (or after), it is preferable to make one of the opposing side panels (ideally the shorter side panels) with a number of ascending creases, but even if not There are no problems with creases. As shown in Fig. 2, the thick paper material thus formed is formed with a notch portion 6 formed at the four corners to smoothly form the peripheral edge portion of the container opening at the flange portion (the crotch portion). The notch portion 6 is formed between the side sheets 7 and 8 and 8 and 7'. A V-shaped folded sheet 9 having a short missing portion 6 is formed. That is, the upper portion of the folded piece 9 is formed as a notch portion 6. It is preferable to form creases on both sides of the folded-in piece 9 and the boundary between the bottom surface and the side surface. The crease is preferably formed by a stamping die, but there is no problem even if it is not formed. The folded piece 9 may have a sharp angle in a portion in contact with the bottom surface, but it is preferably a triangular shape (V shape). The angle of the acute angle is 10 to 20 degrees in this embodiment, and particularly the twist to 16 degrees is good. -12-201139127 According to the use of the container, the side wall can be further erected, so that 1 〇 to 30 degrees is preferable. 3 and 4 show an example of a mold used in the present invention, in which the two side sheets of the thick paper sheet (which are preferably short sides) are supported by the freely-engaging rods 1 〇, 1 〇 'on. The rod 10, 10' is fitted into a hole (cavity) formed in the female mold (mother mold) 11, and is movable up and down in the hole. It is preferable that the rods 10, 10' are always protruded by the upper end of the concave mold 11 by about 15 to 30 mm. The hole is preferably 3 to 1 mm in diameter, and particularly preferably 3 to 7 mm. The front end of the rod 10 is inclined and formed into a quadrangular shape. The cross section may also be polygonal or circular. The lower ends of the rods 10, 10' are fixed to a circular plate that has been fixed to the upper end of the coil spring 13. Therefore, when the rod 1 〇, 10 0 ' is pressed by the convex mold 12, the force against the coil spring 13 is lowered, and when the pressing is released, the force is raised by the coil spring 13 to return to the original position. . The support member can be not only a rod but also a force that moves the plate against the spring and returns to the original position by the force of the spring. Further, the plate body may be inclined to the concave mold (mother mold) 1 to be formed in the same manner as the concave mold by pressing, and when the pressing is released, the force is returned to the original position by the force of the spring. In the outer periphery of the upper end portion of the peripheral portion of the concave portion 14 of the female mold 1 1 , an annular rib 17 is formed, and the ridge 17 is a rising portion of the peripheral portion of the female mold concave portion which is inclined upward toward the outer side. The descending inclined portion 16 of the lower end portion of the portion 1 5 is formed and substantially mountain-shaped. Therefore, as shown in FIG. 5, the four corners can be heat-sealed while forming the container in one process, and the manufacturing has the opening portion-13-201139127. The pulp material container 2 is a rising edge portion 3 whose outer peripheral portion faces the outer side and a crest portion 5 having a mountain-shaped lower inclined portion 4 whose front end portion is lowered. Further, the rising inclined portion 3 and the descending inclined portion 4 may be formed in an arc shape to form a semicircular beak portion 5. As shown in Fig. 3 and Fig. 4, a heating plate 18 is fixed to the upper end of the side surface of the mother die in the vicinity of the annular ridge 17 of the mother die which intersects (slightly orthogonal to) the direction of the papermaking direction. The descending inclined portion 16 is heated by the heating plate 18. The heating system is made to have a higher temperature than the concave mold. It is better to heat up to about 5~15C. Since the present invention forms a double-coated container, it must be heated to a temperature lower than the softening temperature of the thermoplastic resin. Therefore, the concave mold and the descending inclined portion 16 are cooled to a temperature lower than the softening temperature. In this embodiment, since polyethylene is used, the softening temperature of polyethylene is set to 80 ° C or lower. When the temperature of the concave mold is 50 to 65 °C, the descending inclined portion 16 is preferably 65 to 75 °C. In the above embodiment, the heating plate is used, but a heat source such as a heater may be embedded in the female mold to make the descending inclined portion a predetermined temperature. In the foregoing embodiment, the longitudinal direction of the mold is set to be the direction of the papermaking direction. Further, depending on the size and purpose of the container for the pulp material, the heating plate may not be used. As shown in Figs. 3 and 4, the mother mold 11 is provided with walls 19, 19'. The wall 1 9 and 1 9 ' are formed to have the same width as the thick paper. The thick paper is guided by the slippery ramp and dropped onto the master mold, held by the walls 19 and 19' and stopped by the front wall 20. The walls 19, 19, and 20 are functions of positioning, and are punched in this state. 14- 201139127 By supporting a side piece facing one side of a thick paper sheet on a supporting member (rod) 10, 1 0 ' abutting on the side piece, it is erected first, and then by a pair The press dies 11 and 12 are heated and pressed, and the entangled sheet 9 is superposed and adhered to the side sheets 7, 7', and the peripheral portion of the opening of the container is heat-adhered to form a convex portion formed by the rising inclined portion 3 and the descending inclined portion 4. The edge portion 5 is used to manufacture a container made of pulp material. At this time, when the support member 10, 10' is pressed by the male mold 12 and the female mold 11, the load of the elastic body 13 is lowered, and after the press, when the convex mold 12 is raised, Then, with the force of the elastic body 13, the rise returns to the original position. When the concave mold 11 and the convex mold 12 are placed in the left-right direction and pressed, the support member 10 is moved in the lateral direction against the force of the elastic body 13, and when the convex mold 12 is moved, the elastic body 13 is used. The force, return to the original position. When the thick paper material as shown in FIG. 2 is punched by the concave-convex mold and pasted and pasted, the upper portion of the V-shaped sheet 9 is folded back, and after passing through the state of FIG. 6, as shown in FIG. As shown in the above, the peripheral portion of the opening of the container can easily form a flange portion (bow portion) 5 having a slightly mountain-shaped cross section formed by the outer rising inclined portion 3 and the descending inclined portion 4 descending from the inclined portion. When the V-shaped folded piece 9 is folded back together with the V-shaped folded piece 9, it becomes a part in which the folding is three layers, so that a crepe or crack occurs at the corner portion, and a complete flaw cannot be formed. Shape 5. As shown in Fig. 6, the shorter V-shaped folded piece 9 is adhered to the surface Α of the side wall 7'. Fig. 8 is a view showing another example of the mold used in the present invention, the two side sheets of the thick paper 2 1 (which are preferably the opposite short sides) are the rods of the -15-201139127. 0, to support. The rod 10, 1 ο can be moved up and down in the hole formed in the female mold (mother mold) 11'. According to the above-described manner, when the rod 1 〇, 1 〇 ' is pressed by the convex mold (male mold) 12, the rod 1 0, 1 0 'follows the force of the spring 13 and descends. When the mold 12 is raised, the force of the spring 13 returns to the original position. The support member (rod) 1 〇, 10' is provided so as to be movable up and down only in the hole of the concave mold 11, but since the double-coated container is manufactured, the concave mold 11 needs to be heated to 55 to 65. Around °C, when the hot air is blown to the corner of the container and continuously pressed, the temperature of the mother mold becomes higher, causing the container to adhere to the mother mold. As shown in Fig. 11 and Fig. 12, the mother mold needs to be cooled. Therefore, a passage 28 for circulating water for cooling is formed in the side wall of the concave mold. The cooling system can be maintained at about 5 5 to 65 °C. Therefore, the support member (rod) 10 needs to be disposed so as not to obstruct this passage 28. As shown in FIG. 4, the mold is provided with a mold having a rectangular-shaped annular ridge 17 on the outer periphery of the upper end of the concave portion of the mother mold. Therefore, the four corners can be heat-sealed while forming the container in one process. A container made of pulp material having a beak-like portion having a slightly mountain-shaped cross section is produced. In Fig. 7, since a mold having a ring-shaped ridge having a substantially square cross section is used, it is formed into a container made of a pulp material having a U-shaped portion 1 2 '. In order to form a container made of a pulp material by a pair of concave and convex heating stamping dies, a thick paper is placed on a mother mold (concave mold) 11 as shown in FIGS. 3 and 4. One of the opposing side panels is supported on the rod 1 〇 , 1 〇 '. In the foregoing embodiment, the rods 1 〇, 1 〇 ' are used as the supporting members. The rods 1〇-16- 201139127 and 10' are holes formed in the concave molds fitted in the vicinity of the corners of the four corners as shown in Figs. 3 and 4 . In the vicinity of the corner portion, it is preferably a position from the position where the angled portion (polymer portion) is 5 mm long to about 1/4 of the length of the side sheet. If the rod is disposed opposite to the short side sheets, each of the two rods may be provided. However, in the case where the container is large, one additional section may be added in the middle. It is ideal because it is easily placed on a short side piece. The plate body may be used instead of the rod, and the plate body is pressed against the opposite surface to reduce the force against the spring. When the force is released, the elongated hole is disposed in the concave mold by the force of the spring. Hehe. The length of the plate body is preferably 1/3 or more of the length of the side sheet, and is longer than the corner sticking portion (polymerized portion) by about 5 mm. The support member may also use a plate body instead of the rod to lower (move) the plate body against the force of the spring, and return to the original position by the force of the spring. Further, the plate body may be inclined to the concave mold (mother mold), and lowered (moved) by pressing to form the same plane as the concave mold, and when the pressing is released, the spring force returns to the original position. . Further, the plate body may be set to be tiltable and stand up. It is preferable that the supporting member is provided on the mold, but in the case where it can be placed in contact with or close to both side portions of the concave mold, it is not particularly required to be provided on the mold. Further, in this case, since the pressing of the mold is not hindered, it is not necessary to move up and down. In the foregoing embodiment, the coil spring is used as the elastic body, but if it is lowered by the force of the 'resistance elastic body', when the pressing is released, the force is returned to the original position by the force of the elastic body, no matter what. The elastomers are all -17-201139127, and are not particularly limited. Fig. 10 is a view showing an example of manufacturing a polyethylene feeder of the present invention, in which a folded-in sheet 9 having a V-shape is formed at four corners of a thick paper sheet facing the notch portion 6. The i-side portion forms a notch portion 6. The elongated heated gas discharge pipe 25 is heated at a temperature of 180 to 200 ° C which is opposed to the defect which is preferably inclined from the vertical angle of 15 to 45 degrees. In the heating gas ejecting device, the compressed pipe 27 is passed through the heaters 180 to 20 (TC is ejected from the heating gas ejecting pipe 25. When it is too low, adhesive sticking occurs, and when it is too high, it will be in the foregoing embodiment. The heating gas is always ejected and controlled, and the heating gas is ejected only when the pressing is performed. The heating gas ejecting pipe 25 is formed to be freely squeezable, and the injection position and direction can be freely adjusted. The elongated heating gas can also be ejected from the pipe position. The gas in the body side (ideally inclined from the vertical inclination of 1 5 to 4 5 degrees) can also be ejected from both the obliquely upper side and the obliquely lower side. When the gas is ejected obliquely downward, it can also be used. As shown in Fig. 8, the heating gas in the heating gas passage formed in the concave mold (or the punch hole (about 1 mm in diameter) (hot air ejection hole) 22, from the upper side obliquely or/and obliquely downward The heating is performed on both sides of the notched portion 6, which is printed on both sides of the sheet, and is printed on the upper side of the portion 6 of the sheet 9 (the position is always ejected from the tube 25, and the temperature is controlled to heat the gas). Temperature produces burnt However, it is also possible to perform a discontinuous trajectory in which the hot gas is sprayed in response to the obliquely lower position of the notch portion 6 of the container, and the four corners which are used for the purpose of cooling will be ejected through the small holes of the embedding tube. The gas is also ejected, and the hot gas from the mold is ejected from 18 to 201139127. The figure 23 in the figure is a tube for introducing the heating gas into the passage 22, and is fitted into the tube 22. The concave mold is as shown in Fig. 11. As shown in Fig. 12, the water circulates in the circulation passage 2, and the mold temperature is 55 ° C to 65 t. When it is in this temperature range, the formed container can be effectively prevented from adhering to the mold, and the angle can be smoothly smoothed. Adhesive. When the temperature is too low, it will cause poor adhesion, and when it is too high, the formed container will adhere to the mold. The temperature of the stamping convex mold is 180 ° C before and after, but 170~ 1 90 It is preferable to carry out the °C. When it is too low, there is a problem of sticking of the corners, and when it is too high, the paper of the burnt or the like is deteriorated. In the foregoing embodiment, it is shown that the concave and convex mold faces up and down. Example of punching in the direction However, the concave-convex mold may be arranged to be pressed in the left-right direction, so that the thick paper material is dropped from above to the concave-convex mold, and then punched in the lateral direction. Fig. 9 shows other thick paper coated with double-sided polyethylene. For example, 'the cut portion 29' for forming the side sheet is formed at the four corners. The shorter side sheets 8, 8' are erected first, and then stamped with a concave-convex mold to allow the adjacent side sheets 8 and 7 and 7', 8 It is possible to form a container having a flange portion (a weir portion) by polymerizing it in the same manner as described above. The container made of the pulp material produced by the method of the present invention is not particularly limited. However, as a desirable one, a container for accommodating a tray such as a fish, a lunch box, a natto container, or the like, a container for planting a plant, or the like may be mentioned. -19 - 201139127 [Industrial Applicability] By using the manufacturing method of the present invention, it is possible to easily manufacture a container made of a pulp material which is coated on both sides of a thermoplastic resin which cannot be produced by a mold in the past by a mold. . Therefore, the container of the present invention can be used as a tray for accommodating fish or the like, even if it is washed and dropped with water by a cutting board that is contaminated with blood or the like. Therefore, it can be expected to be replaced. Conventional plastic containers have been used for the purpose of preventing global warming. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing an example of a conventional food storage container. Fig. 2 is a plan view showing a thick paper of a raw material of a food container manufactured by the present invention. The picture shows a partial expansion of the container. Figure 3 is a plan view of a concave mold used in the present invention. Figure 4 is a cross-sectional view showing a concave mold and a convex mold used in the present invention. Fig. 5 is a partial perspective view showing a state in which the food container of the present invention is formed through the state of Fig. 6. Fig. 6 is a development view showing a part of an example of a food container manufactured by the present invention. Fig. 7 is a partial perspective view showing another example of the food container manufactured by the method of the present invention. Fig. 8 is a cross-sectional view showing an example of manufacturing a food storage container by the mold of the method of the present invention. Fig. 9 is a plan view showing another example of the thick paper of the raw material of the present invention -20-201139127. The picture shows the expanded view of the container. Fig. 1 is a schematic plan view showing the manufacturing method of the food storage container of the present invention. Figure 11 is a schematic cross-sectional view of a mold used in the present invention. Figure 1 2 is a schematic plan view of a mold used in the present invention. [Description of main component symbols] 〇1: Polymer portion 2 of the side sheet: Food container 5: Flange portion of the container (锷) 6: Notch portion 7, 7 ', 8: Side sheet 9: Fold in sheet 1 0,1 0 ' : rod (thick paper supporting member) 1 1 : concave mold (mother mold) ΰ 12 : convex mold (male mold) 13 : coil spring 1 7 : annular rib 1 8 : heating plate 19 , 19', 20: Wall 2 5: Heated gas discharge pipe 28: Liquid (water) circulation path - 21 -