TW201026501A

TW201026501A - Multilayer sheet, thermoforming container and easy-open packaging body

Info

Publication number: TW201026501A
Application number: TW098137419A
Authority: TW
Inventors: Toshiya Sato
Original assignee: Idemitsu Unitech Co Ltd
Priority date: 2008-11-10
Filing date: 2009-11-04
Publication date: 2010-07-16
Also published as: JP5363785B2; CN101733987A; JP2010111087A; KR20100052413A

Abstract

The multilayer sheet (20) of this invention comprises a surface layer (21) and an underneath layer (22) adjacent to the surface layer (21). The thickness dimension of the surface layer (21) is 1 μm to 200 μm. The composition of the surface layer (21) comprises polypropylene, polypropylene resin, polyethylene resin, and styrene polymer, the contents of which are 60wt% to 80 wt%, 1wt % to 10 wt%, 8 wt% to 28 wt%, and 4 wt% to 14 wt%, respectively. The underneath layer (22) comprises polyethylene resin, the content of which is 5 wt% to 50 wt%.

Description

201026501 六、發明說明：【發明所屬之技術領域】本發明係關於多層片材、熱成形容器及具備該容器之易開封性包裝體。例如使用將蓋材與容器藉由熱封而密封之包裝形態的易開封性包裝體，其係包裝食品、藥品、化妝品等。【先前技術】近年來，隨著對食品之安全意識之增強，可提高内容物之岔封性且可取出内容物之易開封性容器、蓋材、及具備該等谷β及蓋材之包裝體已為人所知（參照文獻1 :日本特開2003-231226號公報，文獻2:日本特開平7_223299號公報）。文獻1係揭示一種多層片材，其係具備包含聚烯烴系樹脂及乙烯·丙烯酸酯·順丁烯二酸酐共聚物系樹脂之Α層、及包含聚烯煙系樹脂之B層。且’亦揭示了將多層片材熱成形而成之熱成形容器。文獻2係揭示一種蓋材用易剝離複合片材，其係包含含有聚烯烴系樹脂及苯乙烯系嵌段聚合物之表面層、及含有本乙稀系树月曰及本乙稀糸後段聚合物之基材層之2層然而，文獻1所記載之容器，會因作為密封層之A層内產生之凝集破壞、與A層及其鄰接之B層間之層間剝離無規則發生，而有使開封面不安定之情形。因此，會因有散亂之凝集破壞之痕跡如細毛等殘留於密封面 J叫’而有其混入包裝體之一部分’使開封時之感覺變差之情形。 143812.doc 201026501 又，構成A層之原料中係使用低嫁點者。因此，執成形時之加熱區域為加熱板之接觸加熱之情形，有於加熱板附著片材，阻礙安定之容器成形之情 H ^ 又，在内容物之填充·殺菌·保存步驟中將其置於离、'田於同，皿虱圍時，會有A層熔化、易破裂之情形。再者，較高設定熱封條件時，A層會容易被排斥’有成為阻礙密封性之原因的情形。又，文獻2所記載者係藉由層間剝離而開封者，片材成形時’根據容器熱成形時之加熱條件等之變化，使剝離強度易變化而有開封觸感變差之情形。又，於包裝體填充内容物而密封時，為預防内容物茂漏而有較高設定熱封條件之情形。然而該情形會因提高密封性而有犧牲開封後之外觀或開封感之情形。【發明内容】本發月之目的在於提供—種易開封性及開封觸感安定、耐熱性及開封面之外觀良好的容器、具備該容器之包裝體、及構成該等容器及包裝體之多層片材。本發明之多層片材其特徵在於：其係含有表面層、及鄰接於該表面層而積層之表下層而構成者，且，上述表面層之厚度尺寸係1㈣〜200 μηι ’上述表面層之構成係包含聚丙烯：聚丙烯系樹脂、聚乙烯系樹脂、及苯乙烯系聚合 =等聚丙烯、聚丙烯系樹脂、聚乙烯系樹脂及笨乙烯 ’、物之a有率分別係60質量°/。以上80質量％以下、i質量乂上1〇質量％以下、8質量％以上28質量％以下及4質量％以上14暫县。/ v. 量/°以下’上述表下層係含有聚乙烯系樹 143812.doc 201026501 月曰’該聚乙烯系樹脂之含有率係5質量％以上50質量％以下。又’本發明之多層片材其特徵在於：其係含有表面層、及鄰接於該表面層而積層之基材層所構成者，且，上述表面層之厚度尺寸係1 μιη，上述表面層之構成係包含聚丙烯、聚丙烯系樹脂、聚乙烯系樹脂、及苯乙烯系聚 Q物，忒等聚丙烯、聚丙烯系樹脂、聚乙烯系樹脂及笨乙201026501 SUMMARY OF THE INVENTION [Technical Field] The present invention relates to a multilayer sheet, a thermoformed container, and an easy-open package having the container. For example, an easy-opening package in a package form in which a lid member and a container are sealed by heat sealing is used, and a food, a medicine, a cosmetic, or the like is packaged. [Prior Art] In recent years, with the enhancement of the safety awareness of foods, the easy-opening container, the cover material, and the package having the grain and the cover material which can improve the sealing property of the contents and can take out the contents The body is known (refer to Japanese Laid-Open Patent Publication No. Hei. No. 2003-231226, Japanese Patent Application Laid-Open No. Hei No. Hei No. Hei 7-223299). Document 1 discloses a multilayer sheet comprising a enamel layer comprising a polyolefin resin, an ethylene acrylate-maleic anhydride copolymer resin, and a B layer comprising a olefinic resin. Also, a thermoformed container obtained by thermoforming a multilayer sheet is disclosed. Document 2 discloses an easily peelable composite sheet for a cover material comprising a surface layer containing a polyolefin resin and a styrenic block polymer, and a polymerization layer comprising the present ethylene tree and the ethylene Two layers of the substrate layer of the material However, the container described in Document 1 has irregular occurrence due to aggregation failure occurring in the A layer as the sealing layer and interlayer peeling between the A layer and the adjacent B layer. Open the cover is not stable. Therefore, there is a case where there is a disorder of agglomerated damage such as fine hair remaining on the sealing surface J and there is a portion which is mixed into the package body to deteriorate the feeling at the time of opening. 143812.doc 201026501 Also, among the raw materials constituting the A layer, low-margin points are used. Therefore, the heating zone at the time of forming is heated by the contact of the heating plate, and the sheet is attached to the heating plate to hinder the formation of the stable container, and is placed in the filling, sterilizing and storing steps of the contents. When leaving, 'Tian Yutong, when the dish is around, there will be a case where the A layer melts and is easily broken. Further, when the heat sealing condition is set higher, the layer A is easily repelled, and there is a case where the sealing property is hindered. Further, in the case of the document 2, when the sheet is formed by the delamination, when the sheet is formed, the peeling strength is easily changed depending on the heating conditions at the time of thermoforming of the container, and the feeling of opening the lid is deteriorated. Further, when the package is filled with the contents and sealed, there is a case where the heat sealing condition is set to a high level in order to prevent leakage of the contents. However, this situation may result in a situation in which the appearance or the feeling of opening after opening is sacrificed due to the improvement of the sealing property. SUMMARY OF THE INVENTION The purpose of this month is to provide a container which is easy to open and has a good touch, a heat resistance and a good appearance, a package having the container, and a plurality of layers constituting the container and the package. Sheet. The multilayer sheet of the present invention is characterized in that it comprises a surface layer and a surface layer laminated adjacent to the surface layer, and the thickness of the surface layer is 1 (four) to 200 μηι 'the composition of the surface layer. It is composed of polypropylene: polypropylene resin, polyethylene resin, and styrene polymerization = polypropylene, polypropylene resin, polyethylene resin, and stupid ethylene, and the yield of each is 60 mass ° / . The above 80% by mass or less, the i mass amount is 1% by mass or less, 8% by mass or more and 28% by mass or less, and 4% by mass or more. / v. Amount / ° or less The lower layer of the above-mentioned table contains a polyethylene tree 143812.doc 201026501. The content of the polyethylene resin is 5% by mass or more and 50% by mass or less. Further, the multilayer sheet of the present invention is characterized in that it comprises a surface layer and a base material layer laminated adjacent to the surface layer, and the surface layer has a thickness of 1 μm, and the surface layer is The structure includes polypropylene, a polypropylene resin, a polyethylene resin, a styrene-based poly Q material, a polypropylene such as ruthenium, a polypropylene resin, a polyethylene resin, and a stupid B.

φ 稀系聚0物之含有率分別係60質量％以上80質量％以下、J 質量％以上10質量％以下、8質量％以上28質量％以下、及4 1量％以上14質量％以下’上述基材層係含有聚乙稀系樹月曰°亥聚乙烯系樹脂之含有率係5質量％以上5〇質量％以下。此處，較好的是，本發明之多層片㈣於上述表面有分散劑。又本發明中，使用於上述表面層之聚丙烯系樹脂宜係 ❹㈣乙烯-丁烯]-三聚物。且，苯乙稀系聚合物宜係苯乙烯-乙烯丁烯苯乙烯嵌段共聚物。本發明之熱成形容ϋ之特徵為：㈣藉由將上述之本發明之多層片材予以熱成形而獲得，且具有開口部者，且，上述開口部之周邊係形成有凸緣部。之包裝體之特徵為：具備上述之本發明材。豸谷器之開口部以封閉之狀態熔著之蓋此處，較好的是，本發明之易開封性包裝體係於上述凸 I43812.doc 201026501 料mΠ部側附近形成樹脂積存部。根據本發明’可提供—種易開封性及開封觸感安定、耐熱性及開封面之外觀良好的容器、具備該容器之包裝體、及構成該等容器及包裝體之多層片材。【實施方式】以下，茲根據圖式說明本發明之實施形態。圖1係顯示本發明之實施形態之多層片材的剖面圖。本發明之多層片材20係具備：基材層23;鄰接於基材層 23而積層之表下層22;及鄰接於該表下層而積層之凝集破壞性之表面層21。基材層23之構成係依次積層有第1基材層23Ε、第1接著層23D、氣體阻隔層23C、第2接著層23Β、及第2基材層 23Α。第1及第2基材層23Ε、23Α係可使用如聚丙烯系樹脂、聚乙烯系樹脂、聚醯胺系樹脂、及聚對苯二甲酸乙二醇酯系樹脂等’但不限於此。各基材層23Ε、23Α之厚度係 100〜2000 μιη，較好之為 200〜1〇〇〇 μιη。第1及第2接著層23D、23Β係可使用如聚偏二氯乙烯系樹脂’但亦可使用不飽和羧酸或其衍生物改質聚烯烴樹脂。作為耽體阻隔層23C ’較好的是使用聚醯胺系樹脂、聚對苯二甲酸乙二醇酯系樹脂、乙烯-乙烯醇系樹脂、及聚偏二氣乙烯等之材料，其中使用乙烯-乙烯醇系樹脂較佳0 143812.doc 201026501 表下層22係含有聚乙烯系樹脂，其含有量係5質量％以上、50質量％以下，較好之為1〇質量％以上、％質量％以下。 “ 又，表下層22亦可含有聚丙烯系樹脂，例如均聚丙烯、無規聚丙稀。表面層21係至少含有聚丙烯、聚丙烯系樹脂、聚乙烯系樹脂及苯乙烯系聚合物。參聚丙烯之含有量係6〇質量％以上、8〇質量％以下較好之為65質量％以上、75質量％以下。聚丙烯系樹脂之含有量係1質量％以上、1〇質量％以下，較好之為2質量％以上、5質量％以下。作為聚丙烯系樹月曰’例如可使用丙烯-乙烯-丁烯_丨_三聚物。又表面層21之聚乙婦系樹脂之含有量係§質量。/〇以上、28質量％以下，較好之為13質量％以上、23質量％以下。 φ 苯乙烯系聚合物之含有量係4質量❹/〇以上、14質量％以下’較好之為6質量％以上、12質量。/。以下。本實施形態所使用之笨乙烯系聚合物係苯乙烯、或鄰甲基苯乙烯、間甲基苯乙烯、對曱基苯乙烯、乙基苯乙烯、一甲基苯乙烯等之芳香族乙烯基烴、與丁二烯、異戊二稀、戊二烯等之二烯化合物的嵌段共聚物。作為其結構，其係聚苯乙烯-聚丁二烯（SB)及聚苯乙烯·聚異戊二烯（si) 等之2元系嵌段共聚物、聚苯乙烯-聚丁二烯-聚苯乙烯 (SBS)及聚苯乙烯聚異戊二烯聚苯乙烯（sis)等之3元系嵌 143812.doc 201026501 段共聚物。又可舉例有將該等嵌段共聚物氫化之苯乙烯-乙烯丁烯-苯乙烯（SEBS)、苯乙烯-乙烯丙烯-苯乙烯（SEPS) 等之飽和型PS系BP。SB系BP較好之為使用苯乙烯-乙烯丁烯苯乙烯嵌段共聚物。該苯乙烯系聚合物中之苯乙烯含有量並無特別限定，但可使用苯乙烯等之芳香族乙烯基烴在1〇質量％至80質量％之範圍的市售品，具體之有電氣化學工業（股）製之電化 STR、電化-KURIARENN、日本合成橡膠（股）製JSR-TR、旭化成工業（股）製 TAFUPURENN、SORUPURENN、 ASAFUREKKUSU、TAFUTEKKU、飛利浦製 SORUPURENN 、K樹脂、SIERU化學（股）製 KARIFUREKKUSU TR、 KUREITONN G、KURARE(股）製 SEPUTONN等。又，表面層21亦可進一步含有分散劑。該情形，分散劑之含有量係1質量％以上、8質量％以下，較好之為2質量％以上、5質量％以下。表面層21之厚度係1 μπι以上、200 μηι以下，較好之為10 μηι以上、100 μπι以下。如此之多層片材20係藉由使用Τ模頭之多層押出成形法而成形。即，係使用對應各層2 1~23之押出機，使從各押出機押出之各層21〜23於進入Τ模頭之前所設之特殊區塊合流、積層而成形。其後，參照圖2Α、圖2Β、及圖3說明本發明之一實施形態之具備容器及蓋材的易開封性包裝體（以下簡稱為「包裝體」）。本實施形態之包裝體可適合利用作為點心類、 143812.doc 201026501 微波用食品、某考用冷· 口楚々A rj r〇 , .，、、方、用喂00等之食品用包裝體。 [第1實施形態] ⑴包裝體1之構成：The content ratio of the φ rare poly-material is 60% by mass or more and 80% by mass or less, J% by mass or more and 10% by mass or less, 8% by mass or more and 28% by mass or less, and 41% by mass or more and 14% by mass or less. The content of the base material layer is 5% by mass or more and 5% by mass or less of the polyethylene-based resin. Here, it is preferred that the multilayer sheet (4) of the present invention has a dispersing agent on the surface. Further, in the present invention, the polypropylene-based resin used in the surface layer is preferably a ruthenium (tetra)ethylene-butene]-trimer. Further, the styrene-based polymer is preferably a styrene-ethylene butylene styrene block copolymer. The hot-formed container of the present invention is characterized in that: (4) the multilayer sheet of the present invention is obtained by thermoforming, and has an opening, and a flange portion is formed around the opening. The package is characterized in that it has the above-described invention. Here, it is preferable that the opening portion of the masher is fused in a closed state. Here, it is preferable that the easy-opening packaging system of the present invention forms a resin reservoir in the vicinity of the side of the ridge portion of the above-mentioned convex I43812.doc 201026501. According to the present invention, it is possible to provide a container which is easy to open and has a good touch, a heat resistance and an open cover, a package having the container, and a multilayer sheet constituting the container and the package. [Embodiment] Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 1 is a cross-sectional view showing a multilayer sheet according to an embodiment of the present invention. The multilayer sheet 20 of the present invention comprises a base material layer 23, a surface layer 22 which is laminated adjacent to the base material layer 23, and a surface layer 21 which is agglomerated and agglomerated adjacent to the surface layer. The base material layer 23 is formed by laminating a first base material layer 23, a first back layer 23D, a gas barrier layer 23C, a second back layer 23, and a second base material layer 23 in this order. For the first and second base material layers 23, 23, for example, a polypropylene resin, a polyethylene resin, a polyamide resin, and a polyethylene terephthalate resin can be used, but it is not limited thereto. The thickness of each of the substrate layers 23 Ε and 23 系 is 100 to 2000 μm, preferably 200 to 1 μm. For the first and second subsequent layers 23D and 23, for example, a polyvinylidene chloride-based resin can be used, but an unsaturated carboxylic acid or a derivative thereof can be used to modify the polyolefin resin. As the steroid blocking layer 23C', a material such as a polyamide resin, a polyethylene terephthalate resin, an ethylene-vinyl alcohol resin, or a polyvinylidene chloride is preferably used, and ethylene is used. - The vinyl alcohol-based resin is preferably 0 143812.doc 201026501 The lower surface layer 22 contains a polyethylene-based resin, and the content thereof is 5% by mass or more and 50% by mass or less, preferably 1% by mass or more and 1% by mass or less. . Further, the surface layer 22 may contain a polypropylene resin such as a homopolypropylene or a random polypropylene. The surface layer 21 contains at least polypropylene, a polypropylene resin, a polyethylene resin, and a styrene polymer. The content of the polypropylene is preferably 6 mass% or more and 8 mass% or less, and is preferably 65 mass% or more and 75 mass% or less. The content of the polypropylene resin is 1% by mass or more and 1% by mass or less. It is preferably 2% by mass or more and 5% by mass or less. For example, a propylene-ethylene-butylene-ruthenium terpolymer can be used as the polypropylene-based tree 曰. The content of the polyethylene-based resin of the surface layer 21 is further contained. The amount is § mass / 〇 or more, 28% by mass or less, preferably 13% by mass or more and 23% by mass or less. φ The content of the styrene-based polymer is 4 mass ❹ / 〇 or more and 14 mass % or less ' It is preferably 6 mass% or more and 12 mass% or less. The stupid vinyl polymer used in the present embodiment is styrene, o-methyl styrene, m-methyl styrene, p-nonyl styrene, Aromatic styrene, monomethyl styrene, etc. a block copolymer of a vinyl hydrocarbon, a diene compound such as butadiene, isoprene, pentadiene or the like. As a structure thereof, it is a polystyrene-polybutadiene (SB) and a polystyrene. a 2-membered block copolymer such as polyisoprene (si), polystyrene-polybutadiene-polystyrene (SBS), and polystyrene polyisoprene polystyrene (sis) The ternary system is embedded in 143812.doc 201026501. The copolymer of styrene-ethylene butylene-styrene (SEBS), styrene-ethylene propylene-styrene (SEPS), etc. The saturated PS type BP is preferably a styrene-ethylene butylene styrene block copolymer. The styrene content in the styrene polymer is not particularly limited, but styrene may be used. A commercially available product of an aromatic vinyl hydrocarbon in the range of 1% by mass to 80% by mass, specifically, an electrochemical STR manufactured by the Electrochemical Industry Co., Ltd., an electro-chemical-KURIARENN, and a JSR-made by Japan Synthetic Rubber Co., Ltd. TR, Asahi Kasei Industrial Co., Ltd. TAFUPURENN, SORUPURENN, ASAFUREKKUSU, TAFUTEKKU, Philips SORUPURENN K resin, SARIU Chemical Co., Ltd. KARIFUREKKUSU TR, KUREITONN G, KURARE (s) SEPUTONN, etc. Further, the surface layer 21 may further contain a dispersing agent. In this case, the content of the dispersing agent is 1% by mass or more. 8 mass% or less, preferably 2 mass% or more and 5 mass% or less. The thickness of the surface layer 21 is 1 μπι or more and 200 μηι or less, preferably 10 μηι or more and 100 μπι or less. The 20 series was formed by a multilayer extrusion molding method using a boring die. That is, the extruders corresponding to the respective layers 2 1 to 23 are used, and the respective layers 21 to 23 which are ejected from the respective extruders are joined and formed by laminating and laminating the special blocks provided before entering the die. Then, an easy-opening package (hereinafter simply referred to as "package") provided with a container and a lid member according to an embodiment of the present invention will be described with reference to Fig. 2A, Fig. 2A, and Fig. 3. The package of the present embodiment can be suitably used as a package for foods such as a snack, a food for microwaves of 143812.doc 201026501, a cold, a mouthpiece, a garnish, and the like. [First Embodiment] (1) Configuration of package 1:

❿ 圖2A及圖2B係顯示本發明之包裝體}之一態樣⑷實施形態）的概略圖，圖2A係顯终蓋材3密封之狀態，圖㈣顯示從開封開始部4將蓋材3開封之狀態。且，圖3係圖2A 及圖2 B之開封開始部4之剖面圖。 ,、包裝體1係具備熱成形容器2(以下簡稱為「容器」）與蓋材3。蓋材3係對於容器2之開口部24而載置，且熱封於；開口部24之周緣所配設之凸緣部乃，藉此如圖2八所示，使包裝體1之内部為密封狀態。當蓋材3熱封於凸緣部乃時，形成有環狀之密封部26,其係包含由圖3所示之環狀密封盤7 形成之密封部262與環狀密封盤7a形成之密封部％ i。另一方面，開封密封狀態之包裝體i，如圖2B所示（及如後述之圖7及圖8所示），係藉由於包裝體丨之角部所設之開封開始部4將蓋材3朝上部（圖2B之箭頭方向）拉起，而將包裝體1簡單開封。 (1-1)容器2之構成：谷器2係包含表面層21、表下層22、基材層23之3層的積層體。且’ δ玄谷盗2係具有特定深度之大致長方形的托盤形狀，且具有大致長方形狀之開口部24。於該開口部24之周緣’以突出於外側之方式配設有凸緣部25。此處，本實施形態係顯示於後述之圖7，係藉由將容器2 143812.doc 201026501 之表面層21凝集破壞之凝集剝離而開封包裝體1〇 (1-2)蓋材3之構成：蓋材3在本實施形態中係積層體，其係包含顯現於包裝體1之外部之外層33、與容器2之表面層21熱封之密封層 31、及介於該等密封層31及外層33間之中間層32。與谷益2之表面層21熱封之蓋材3之密封層31係將容写2 之表面層21凝集破壞而剝離的開封狀態。又’構成蓋材3之中間層32使用聚醯胺系樹脂較佳，外層33使用聚對苯二甲酸乙二醇酯系樹脂較佳。例如可使用聚對苯二甲酸乙二醇酯（PET)薄膜、雙轴延伸尼龍薄膜（〇_ Ny)等。另，在將如此之表面層21用於容器2,且將密封層31用於蓋材3而將兩者熱封之情形下，兩層21、31係熔著，而另一方面，在開封包裝體丨時，係對於應力較弱的容器2之表面層21凝集剥離，而良好地進行開封。 (1-3)樹脂積存部6之形成：本實施开^心之包裝體1，如圖3所示，係於位於凸緣部2 5 上面之環狀之密封部262的内周緣附近（圖3之X位置），以將容器2之表下層22、表面層21及蓋材3之密封層31朝容器 2之開口。卩24方向推出之方式，而形成瘤狀之樹脂積存部 6 〇如圖3所不，樹脂積存部6係集合容器2之表面層Μ之樹月曰積存61表下層22之樹脂積存62、及蓋材3之密封層31 之樹月曰積存63而形成。藉由於將容器2之表面層21凝集剝 143812.doc 201026501 離之開封形態之包裝體！形成如此之樹脂積存心，可使本實施形態之包裝體1不僅作為包裝容器具備高密封性，亦可在良好的狀態下維持易開封性。且，藉由簡單進行該樹脂積存部6之蓋材3與容器2之凸緣部乃之切斷，使内壓之應力所施加之方向與凝集破壞之易開封方向相#，可使本實施形態之包裝體i不僅作為包裝容器而於良好之狀態下維持易開封性，亦可實現密封性之提高。2A and 2B are schematic views showing an embodiment (4) of the package of the present invention, wherein Fig. 2A shows a state in which the final cover member 3 is sealed, and Fig. 4 shows a cover member 3 from the opening start portion 4. The state of Kaifeng. 3 is a cross-sectional view of the opening start portion 4 of FIGS. 2A and 2B. The package 1 includes a thermoformed container 2 (hereinafter simply referred to as "container") and a cover member 3. The lid member 3 is placed on the opening portion 24 of the container 2, and is heat-sealed to the flange portion of the periphery of the opening portion 24, whereby the inside of the package body 1 is made as shown in Fig. 2 Sealed state. When the lid member 3 is heat-sealed to the flange portion, an annular seal portion 26 is formed which includes a seal formed by the seal portion 262 formed by the annular seal disk 7 shown in Fig. 3 and the annular seal disk 7a. % i. On the other hand, the package i in the unsealed sealed state is as shown in FIG. 2B (and as shown in FIGS. 7 and 8 to be described later), and the cover member is opened by the opening start portion 4 provided at the corner of the package body. 3 Pull up toward the upper portion (in the direction of the arrow of Fig. 2B), and simply unpack the package 1. (1-1) Configuration of Container 2: The granulator 2 is a laminate including three layers of the surface layer 21, the surface layer 22, and the base layer 23. Further, the δ 玄谷盗 2 has a substantially rectangular tray shape having a specific depth and has an opening portion 24 having a substantially rectangular shape. The flange portion 25 is disposed so as to protrude beyond the outer periphery of the opening portion 24. Here, the present embodiment is shown in FIG. 7 which will be described later, and is configured by unsealing and peeling the surface layer 21 of the container 2 143812.doc 201026501 by agglutination and peeling, thereby unsealing the package 1 (1-2) cover material 3: In the present embodiment, the cover member 3 is a laminated body comprising a sealing layer 31 which is formed on the outer layer 33 of the package 1, and which is heat-sealed to the surface layer 21 of the container 2, and the sealing layer 31 and the outer layer. 33 intermediate layers 32. The sealing layer 31 of the lid member 3 which is heat-sealed with the surface layer 21 of the Guyi 2 is an unsealed state in which the surface layer 21 of the container 2 is agglomerated and broken. Further, the intermediate layer 32 constituting the cover member 3 is preferably a polyimide resin, and the outer layer 33 is preferably a polyethylene terephthalate resin. For example, a polyethylene terephthalate (PET) film, a biaxially stretched nylon film (〇_Ny), or the like can be used. Further, in the case where such a surface layer 21 is used for the container 2, and the sealing layer 31 is used for the cover member 3 to heat seal the two, the two layers 21, 31 are fused, and on the other hand, at the opening In the case of the package, the surface layer 21 of the container 2 having weak stress is agglomerated and peeled off, and the sealing is performed well. (1-3) Formation of the resin reservoir portion 6: The package body 1 of the present embodiment is attached to the inner peripheral edge of the annular seal portion 262 located above the flange portion 25 as shown in Fig. 3 (Fig. 3) The X position of 3) is such that the lower layer 22 of the container 2, the surface layer 21, and the sealing layer 31 of the lid member 3 are directed toward the opening of the container 2. In the direction of the 卩24 direction, the resin-like resin reservoir 6 is formed, as shown in FIG. 3, and the resin reservoir 6 is the surface layer of the container 2, and the resin reservoir 62 of the lower layer 22 of the table. The sealing layer 31 of the cover member 3 is formed by the accumulation of 63. By agglomerating the surface layer 21 of the container 2, the package of the unsealed form is separated from the 143812.doc 201026501! By forming such a resin reservoir, the package 1 of the present embodiment can maintain not only a high sealing property as a packaging container but also an easy-opening property in a good state. Further, by simply cutting the lid member 3 of the resin reservoir portion 6 and the flange portion of the container 2, the direction in which the stress of the internal pressure is applied and the easy-to-open direction of the aggregation failure can be achieved. The package i of the form not only maintains the easy-opening property in a good state as a packaging container, but also improves the sealing property.

又’本發明係於位於容器2之凸緣部。上面之環狀之密封部262的内周緣附近（圖位置）的全周形成上述樹脂積存部6 ’另一方面，位於容器2之開封開始部4之環狀之密封》P 262的外周緣係、形成平坦或小於位於内周緣附近X之樹月旨積存部6的樹脂積存。對應於容器2之開封開始部4以卜之。卩刀的環狀密封部262的外周緣，較好的是形成與位於内周緣附近X之上述樹脂積存部6大致相同大小之未圖示的樹月曰積存部。如此之包裝體【係具備高密封性、易開封性、及來自開封開始部4以外之蓋材3的開封防止性。、此處，右谷器2之表下層22之聚乙烯系樹脂的含有量小質量/〇，則有於表面層21與表下層22之層間因凝集破壞面而起毛之情形。另一方面，若聚乙烯系樹脂之含有量大於5〇質量％ ’則於表下層22與基材層23之間有層間剝離之情形。又’右谷器2之表面層21之聚丙烯之含有量小於6〇質量Further, the present invention is applied to the flange portion of the container 2. The resin reservoir 6' is formed over the entire circumference of the inner circumferential edge of the annular seal portion 262 (the figure position). On the other hand, the outer circumference of the annular seal "P 262" located at the opening start portion 4 of the container 2 is The resin is formed to be flat or smaller than the resin of the tree-shaped reservoir 6 located near the inner periphery. Corresponding to the opening start portion 4 of the container 2 is used. It is preferable that the outer peripheral edge of the annular seal portion 262 of the trowel is formed with a tree stagnation reservoir (not shown) having substantially the same size as the resin reservoir 6 located in the vicinity of the inner peripheral edge X. Such a package has a high sealing property, an easy-opening property, and an opening prevention property of the lid member 3 other than the opening start portion 4. Here, the content of the polyethylene resin in the lower layer 22 of the right barn 2 is small, and the amount of the polyethylene resin is raised between the surface layer 21 and the surface layer 22 due to the agglomerated broken surface. On the other hand, when the content of the polyethylene-based resin is more than 5% by mass, there is a case where the interlayer between the lower surface layer 22 and the base material layer 23 is peeled off. Further, the content of polypropylene in the surface layer 21 of the right grainer 2 is less than 6 〇 mass.

〇〇則有與蓋材3之接著變弱、密著性惡化、及耐熱性惡 4匕之^情开各。SL 另—方面，若聚丙烯之含有量大於80質量％， 1438l2.doc -11- 201026501 則有後著性過強，而使開封性惡化之情形。又，若容器2之表面層21之聚丙烯系樹脂之含有量小質量％，則有與蓋材3之接著變弱、密著性惡化、及耐熱性亦惡化之情形。另一方面，若聚丙稀系樹脂之含有量大於10質量。/。，則有與蓋材3之密著性過強、開封性惡化、製造成本升高之情形。且，若表面層21之聚乙烯系樹脂之含有量小於8質量 %，則有與蓋材3之密著性過強、開封性惡化之情形。另方面，：¾聚乙烯系樹脂之含有量大於28質量％，則有製❿ 造成本升高之情形。再者右表面層21之本乙稀系聚合物之含有量小於4質量％，則有分散性惡化之情形。另一方面，若苯乙埽系聚合物之含有量大於14質量％，則有耐熱性惡化，且製造成本升高之情形。則有難以若表面層21之厚度為小於1 μηι或大於200 μηι 引起凝集破壞之情形。In addition, there is a weakening of the cover material 3, deterioration of adhesion, and heat resistance. SL On the other hand, if the content of polypropylene is more than 80% by mass, 1438l2.doc -11- 201026501 has a tendency to be too strong, and the opening property is deteriorated. In addition, when the content of the polypropylene resin in the surface layer 21 of the container 2 is small by mass, the lid member 3 may be weakened, the adhesion may be deteriorated, and the heat resistance may be deteriorated. On the other hand, if the content of the polypropylene resin is more than 10%. /. In addition, there is a case where the adhesion to the lid member 3 is too strong, the opening property is deteriorated, and the manufacturing cost is increased. In addition, when the content of the polyethylene resin in the surface layer 21 is less than 8% by mass, the adhesion to the lid member 3 may be too strong, and the opening property may be deteriorated. On the other hand, when the content of the 3⁄4 polyethylene-based resin is more than 28% by mass, there is a case where the crucible causes an increase. Further, when the content of the ethylenic polymer in the right surface layer 21 is less than 4% by mass, the dispersibility may be deteriorated. On the other hand, when the content of the styrene-based polymer is more than 14% by mass, the heat resistance is deteriorated and the production cost is increased. It is difficult to cause the agglomeration damage if the thickness of the surface layer 21 is less than 1 μηι or more than 200 μηι.

製造包裝體i之情形下’將容器2之凸緣部25與蓋材3熔著而使包裝體1為密封狀態，係藉由使蓋材3重合於容器2 之凸緣部25 ’且從該蓋材3之上面按壓加熱狀態之環狀密封盤7而實施熱封。於開封開始部4之環狀之密封部加的内周緣附近X形成如上述之瘤狀之樹脂積存部6，例如可如下之方法。始圖4係顯示製造本實施形態之包裝^之情形之開部4的密封步驟的模式圖。幵 143812.doc -12- 201026501 容器2之凸緣部25與蓋材3之熱封，如圖4所示，係藉由將蓋材3重合於容器2之凸緣部25，且從該蓋材3之上部將加熱狀態之環狀密封盤7按壓於圖4之箭頭方向而實施，藉此熔著容器2之凸緣部25之表面層21與蓋材3之密封層31。又，圖5係顯示熱封時之環狀密封盤7與凸緣部乃之狀態的局部剖面圖，且，圖6係環狀密封盤7之局部放大剖面圖。用以製造本實施形態之包裝體丨而使用之環狀密封盤7，係對於凸緣部上面，於内周緣施加尺加工，而外周緣係成為比環狀密封盤7之前端（圖6之前端73)遲接觸於蓋材3的形狀。具體之為，以邊界A(亦為環狀密封盤7之前端73)為中介’於外周緣侧連續形成剖面為傾斜狀之傾斜面部”，而於内周緣侧實施R加工而連續形成剖面為曲面狀之曲 Ί1。其中，形成於環狀密封盤7之外周緣側之傾斜面部Η， • #圖6所示’其相對於凸緣部25由内周,緣側向外周緣側形成之角度（Θ)係根據環狀密封盤7之寬H而不同，可設定為 2〜20°，更好之為3〜15。。若該傾斜面部71之角度小於2。，則即使熱封時予以按壓之情形，上述之如圖3所示之樹脂積存部6亦容易形成於密 ^部26之外周緣附近。因此’在開封所得之包裝體】時，後封部26外侧之阻力舍辦士 .. 〜且力會增大’使得難以順利進行包裝體i 之開封。另一方面，若傾斜面部71之角度大於加。，則邊界A之周 143812.doc -13- 201026501 可能切斷蓋材邊會不平緩而尖銳，在密封時或開封時有 3，有損及易開封性之虞。又，於環狀密封盤7之内周緣側形成之曲面部72所實施之反加工，係根據環狀密封盤7之寬H而不同，將r設定為 0.2 mm〜〇.5 HmmR左右較佳，〇 5職〜〇 4 HmmR左右更佳。若R小於0.2 mmR，則邊|八夕Η、惠a τ τ J運界Α之周邊會不平緩而尖銳，在密封時或開封時有可能切斷蓋材3等。另方面若R大於〇.5 HmmR，則即使熱封時予以按壓❹ 之情形’亦不易於位於凸緣部25上面之環狀密封部M2之内周緣附近X形成樹脂積存部6。此處較好的疋’該等傾斜面部7 i及曲面部係以邊界 A相對環狀密封盤7之剖面寬方向靠内側（靠内周緣）之方式而形成》若邊界A係相對環狀密封盤7之剖面寬方向靠内側，且於環狀密封盤7之内周緣側形成曲面部Μ，於該密封盤7之外周緣侧形成傾斜面部71 ’二者相輔，熱封時前端7 3將確實地比環狀密封盤7之外周緣侧先接觸於蓋材© (裒狀欲封盤7之外周緣比前端73晚接觸於蓋材3)，且對於 %狀密封盤7之内周緣側之開口部24側選擇性地形成樹脂積存部6。又’本發明係於對應於包裝體1之開封開始部4以外之部位的、環狀密封盤7之内周緣及外周緣之兩緣全周，實施上述R加工而形成剖面為曲面狀之曲面部72。且，對應於包裝體1之開封開始部4之環狀密封盤7的部位，係於内周 143812.doc •14- 201026501 緣實施上述R加工而形成剖面為曲面狀之曲面部72,另一方面，由於外周緣形成有傾斜面部71，因此環狀密封盤7 之外周緣係比前端73遲接觸於蓋材3。藉由用具有如此形 . &之環狀密封盤，可製造高密封性、易開封性、及開封開始部4以外之蓋材3的開封防止性優異的容器。另，如圖2A及圖2B所示，環狀密封盤7於熱封時，由於係將環狀之密封部262 一體形成，因此亦可為將上述傾斜 φ ㈣71與曲面部72以環狀連續形成之環狀密封盤（密封環）。又，亦可為僅對於包裝體1之開封開始部4所對應之部位形成該傾斜面部71與曲面部72之環狀密封盤（密封環）。用圖5及圖6所示之形狀之環狀密封盤7將容器2之凸緣部 25與蓋材3予以熱封時，如圖5所示，首先係將環狀密封盤 7之傾斜面部71與曲面部72之邊界A所對應之前端73接觸於蓋材3，其後，將該邊界A之内周緣侧形成之曲面部72朝蓋 • 材3之内側按壓，且將邊界A之外周緣侧形成之傾斜面部71 朝蓋材3之外側按壓。藉此，容器2之表面層21及與該表面層21鄰接之表下層22的樹脂成分將由邊界a之下部押出於容器2之内側，而於凸緣部25之接觸環狀密封盤7之内周緣之位置附近’即容器2之密封部262之内周緣附近x形成鼓起之瘤狀的樹脂積存61、62。且，亦追隨蓋材3之密封層 31而形成樹脂積存63。在該等樹脂積存61、62、63形成樹脂積存部6之狀態下，對容器2之凸緣部25之表面層21與蓋材3之密封層31予以熱封，將兩者熔著。 143812.doc •15· 201026501 種=予封條件’可將密封溫度根據熱封之材料之 :類等予以適宜決定，但一般而言可右。密㈣力可為10〜50kg/cm2(100〜5〇〇kPa)左右。另’僅藉由環狀密封盤7之埶刼夾雜物之虚或f盤之熱封係有易從外周緣側進入之虞。為防止來自外周緣側之夾雜物混入，可一面藉由壤狀密封盤7形成上述瘤狀之樹脂積存部6，—面將蓋材之密封層31熱封於容器2之表面層川麦，用另—環狀密封盤（圖3之環狀_#7a)對容器2之表面㈣與蓋材3之密、層予以熱封。另’此時，以不使環狀密封盤〜接觸於樹脂積存部6,且接觸於蓋材3之密封層以之藉由環狀密封盤7熱封之部分的外周緣側的方式’按壓蓋材3。環狀密封盤7a’其按壓蓋材3之面可為平滑之面，但為不損害易開封性，亦可為能接著滾花等部分之面。 (1-4)包裝體1之開封：圖7係顯示初期開封本實施形態之包裝體ι之狀態的剖面圖，圖8係顯示完全開封該包裝體1之狀態的剖面圖。另此處所述之「初期開封之狀態」係指凝集剝離之剝離面未到達樹脂積存部6之狀態。如上述，為從開封開始部4開封將容器2之凸緣部25與蓋材3熱封所得之本實施形態的包裝體丨，如圖7所示，係對蓋材3於圖7之箭頭方向施加力F。如此藉由對蓋材3所施之力F ’於谷器2之表面層21進行凝集剝離。又，該凝集剝離到達樹脂積存部6時，表面層21之凝集剝離將沿與該表面層2 i鄰接之表下層2 2上形成之樹脂積存 143812.doc -16· 201026501 62的形狀而進行。其後，若表面層21之凝集剝離到達至密封部262之内周緣附近X(亦為切斷位置），則以追隨形成於蓋材3之密封層 31之樹脂積存63的形狀，而切斷容器2之表面層21之樹脂積存61。藉此使得包裝體！之容器2與蓋材3之開封容易進行。 [實施形態之效果] φ 如上述，已特定構成本實施形態之容器2之多層片材20 之表面層21的厚度，與表面層21所含有之聚丙烯、聚丙烯系樹脂、聚乙烯系樹脂、及苯乙烯系聚合物分別之含有率。且亦特定了表下層22之聚乙烯系樹脂之含有率。. 因此，可使表面層21内部之凝集破壞之剝離面安定化’ 確保易開封性與開封觸感。且，由於凝集剝離位置未偏離，故可防止凝集部分之混入，達成美觀的開封外觀。又，可提高高溫氛圍下之耐熱性，防止熱成形時之加熱 ❹ 板接觸時片材附著於加熱板。因此可實現由不選擇熱成形機之加熱方法之耐熱性獲得之穩定的生產率。再者，可防止油分多的内容物或高溫下之填充、再加熱時之片材熔解，可不選擇内容物或保存方法、調理方法地使用容器2。另，在多層片材20不包含表下層22而僅有表面層層的If形下，若於多層片材2〇熱封蓋材3，則有開封時發生外觀不良、開封感不安定之情形。i，藉由於表面層21 含有分散劑，可由於笨乙烯系聚合物之分散性提高，而消 143812.doc -17- 201026501 除表面層21易產生之凹凸，使容器2之外觀更加提高。本實施形態之包裝體1係於容器2之凸緣部25熱封蓋材3 而形成。該包裝體1之易開封性及開封觸感穩定，且耐熱性及開封面之外觀亦良好。又，於包裝體1之開口部24側附近形成樹脂積存部6。因此，若凝集剝離進行至介存有樹脂積存部6之處則根據樹脂積存部6之介有，剝離之應力係作用於將蓋材3從容器2剝離之方向。因此，可良好地進行蓋材3與容器2之凸緣部25之切斷，成為具備良好開封性之包裝體1。 [第2實施形態] 上述第1實施形態之包裝體丨係顯示開封容器2與蓋材3 時’將谷器2之表面層21凝集剝離而開封之態樣。與此相對，第2實施形態之包裝體la，如圖9及圖忉所示，其於開封容器2與蓋材3時，將蓋材3之密封層31凝集剝離之點係與第1實施形態不同。另，本實施形態中與上述第1實施形態相同之結構及相同之構件係賦與其相同符號，且其說明省略或簡化。圖9係顯示初期開封本實施形態之包裝體u之狀態的剖面圖’圖10係顯示完全開封該包裝體la之狀態的剖面圖。如圖9及圖1〇所示，將構成包裝體13之蓋材3之密封層^ 凝集破壞而剝離蓋材3時，作為構成密封層3丨之材料’係採用與上述表面層21相同之構成，且作為中間層32係採用與上述表下層22相同之構成。 143812.doc -18 - 201026501 該情形’作為容器2之表面層21，可使用聚丙烯系樹脂、聚乙稀系樹脂等之聚烯烴系樹脂或該等摻合系樹脂。在將如此之密封層31用於蓋材3,將表面層21用於容器2 而將兩者熱封之情形下，可將兩層21、31熔著，另一方面，開封時將對於應力較弱之蓋材3的密封層31凝集破壞’可良好地進行開封。In the case of manufacturing the package i, the flange portion 25 of the container 2 and the lid member 3 are fused, and the package 1 is sealed, by overlapping the lid member 3 with the flange portion 25' of the container 2 and The upper surface of the lid member 3 is pressed against the annular sealing disk 7 in a heated state to perform heat sealing. The resin-like resin portion 6 having the above-described shape is formed in the vicinity of the inner periphery of the annular seal portion of the opening start portion 4, and for example, the following method can be employed. Fig. 4 is a schematic view showing a sealing step of the opening portion 4 in the case where the package of the embodiment is manufactured.幵143812.doc -12- 201026501 Heat sealing of the flange portion 25 of the container 2 and the lid member 3, as shown in Fig. 4, by overlapping the lid member 3 with the flange portion 25 of the container 2, and from the lid The upper portion of the material 3 is pressed in the direction of the arrow in FIG. 4 by pressing the annular sealing disk 7 in a heated state, thereby melting the surface layer 21 of the flange portion 25 of the container 2 and the sealing layer 31 of the lid member 3. Further, Fig. 5 is a partial cross-sectional view showing a state in which the annular sealing disk 7 and the flange portion are formed during heat sealing, and Fig. 6 is a partially enlarged cross-sectional view showing the annular sealing disk 7. The annular sealing disk 7 used for manufacturing the package body of the present embodiment is formed with a ruler on the inner peripheral edge of the flange portion, and the outer peripheral edge is formed at the front end of the annular sealing disk 7 (Fig. 6 The front end 73) is in late contact with the shape of the cover member 3. Specifically, the boundary A (also referred to as the front end 73 of the annular sealing disk 7) is used as an intermediary to continuously form an inclined surface portion having an inclined cross section on the outer peripheral side, and R is formed on the inner peripheral side to continuously form a cross section. The curved curved shape 1. The inclined surface portion formed on the outer peripheral side of the annular sealing disk 7 is formed by the inner circumference, the edge side and the outer peripheral side with respect to the flange portion 25 as shown in Fig. 6 The angle (Θ) differs depending on the width H of the annular sealing disk 7, and can be set to 2 to 20°, more preferably 3 to 15. If the angle of the inclined surface portion 71 is less than 2, even when heat-sealed In the case of pressing, the resin reservoir 6 shown in Fig. 3 is also easily formed in the vicinity of the outer periphery of the sealing portion 26. Therefore, when the package is obtained by opening the package, the resistance outside the rear sealing portion 26 is arranged.士.. and the force will increase 'to make it difficult to smoothly open the package i. On the other hand, if the angle of the inclined face 71 is greater than plus, the perimeter of the boundary A 143812.doc -13- 201026501 may cut off the cover The edge of the material will not be smooth and sharp, and there will be 3 when it is sealed or opened, which is detrimental and easy to open. Further, the reverse machining performed on the curved surface portion 72 formed on the inner peripheral side of the annular seal disk 7 differs depending on the width H of the annular seal disk 7, and r is set to 0.2 mm to 〇.5 HmmR. It is better to be left and right, 〇5 jobs ~ 〇4 HmmR is better. If R is less than 0.2 mmR, then the edge of the 八八 Η, 惠 a τ τ J will be uneven and sharp, when sealing or opening It is possible to cut the lid member 3, etc. On the other hand, if R is larger than 〇.5 HmmR, the case where it is pressed even when heat-sealed is not easily located near the inner periphery of the annular seal portion M2 on the flange portion 25. The resin reservoir 6 is formed. Here, the inclined surface portion 7 i and the curved surface portion are formed such that the boundary A faces the inner side (the inner peripheral edge) in the cross-sectional width direction of the annular sealing disk 7 A is formed on the inner side in the cross-sectional width direction of the annular seal disk 7, and a curved surface portion is formed on the inner peripheral side of the annular seal disk 7, and an inclined surface portion 71' is formed on the outer peripheral side of the seal disk 7, When heat sealing, the front end 7 3 will surely contact the cover material first than the outer peripheral side of the annular sealing disk 7 (裒The outer peripheral edge of the disk 7 is in contact with the lid member 3) later than the front end 73, and the resin reservoir portion 6 is selectively formed on the inner peripheral edge side opening portion 24 side of the %-shaped sealing disk 7. The present invention is corresponding to the package. The R portion is formed on the inner circumference and the outer circumference of the annular seal disk 7 at a portion other than the opening start portion 4 of the body 1 to form a curved surface portion 72 having a curved cross section, and corresponds to the package. The portion of the annular sealing disk 7 of the opening start portion 4 is formed on the inner circumference 143812.doc • 14 - 201026501. The edge R is formed by the R process described above, and the outer peripheral edge is formed by the outer peripheral edge. Since the inclined surface portion 71 is provided, the outer peripheral edge of the annular sealing disk 7 is later in contact with the cover member 3 than the front end 73. By using the annular sealing disk having such a shape, it is possible to produce a container having high sealing property, easy opening property, and excellent sealing prevention property of the lid member 3 other than the opening start portion 4. Further, as shown in FIG. 2A and FIG. 2B, when the annular sealing disk 7 is heat-sealed, since the annular sealing portion 262 is integrally formed, the inclination φ (four) 71 and the curved surface portion 72 may be continuous in a ring shape. An annular sealing disk (seal ring) is formed. Further, an annular sealing disk (seal ring) of the inclined surface portion 71 and the curved surface portion 72 may be formed only for the portion corresponding to the opening start portion 4 of the package 1. When the flange portion 25 of the container 2 and the lid member 3 are heat-sealed by the annular sealing disk 7 having the shape shown in Figs. 5 and 6, as shown in Fig. 5, the inclined face portion of the annular sealing disk 7 is firstly fixed. The front end 73 corresponding to the boundary A of the curved surface portion 72 is in contact with the cover 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 cover member 3, and the outer periphery of the boundary A is pressed. The inclined surface portion 71 formed on the rim side is pressed toward the outer side of the lid member 3. Thereby, the surface layer 21 of the container 2 and the resin component of the surface layer 22 adjacent to the surface layer 21 will be pressed from the lower portion of the boundary a to the inside of the container 2, and within the contact of the flange portion 25 with the annular sealing disk 7. The vicinity of the position of the periphery, that is, the vicinity of the inner periphery of the seal portion 262 of the container 2, forms a swollen tumor-like resin reservoir 61, 62. Further, the resin layer 63 is formed in conformity with the sealing layer 31 of the cover member 3. In the state where the resin reservoirs 61, 62, and 63 are formed into the resin reservoir 6, the surface layer 21 of the flange portion 25 of the container 2 and the sealing layer 31 of the lid member 3 are heat-sealed, and the both are fused. 143812.doc •15· 201026501 Type = pre-sealing condition 'The sealing temperature can be appropriately determined according to the type of heat-sealing material, etc., but generally it can be right. The dense (four) force can be about 10 to 50 kg/cm 2 (100 to 5 kPa). Further, the heat seal of the inclusions or the f-disk by the enthalpy of the annular seal disk 7 alone is easy to enter from the outer peripheral side. In order to prevent the inclusion of inclusions from the outer peripheral side, the above-mentioned nodular resin reservoir 6 may be formed by the water-tight sealing disk 7, and the sealing layer 31 of the cover material may be heat-sealed to the surface layer of the container 2, The surface (4) of the container 2 and the cover material 3 are sealed and heat-sealed by a double-sealed sealing disk (ring _#7a of Fig. 3). In other words, in this case, the outer peripheral side of the portion where the annular sealing disk is not in contact with the resin reservoir 6 and is in contact with the sealing layer of the cover member 3 by the annular sealing disk 7 is pressed. Cover material 3. The annular sealing disk 7a' may have a smooth surface on the surface of the lid member 3, but may be a surface which can be knurled or the like so as not to impair the easy-opening property. (1-4) Opening of the package 1 Fig. 7 is a cross-sectional view showing a state in which the package ι of the embodiment is initially opened, and Fig. 8 is a cross-sectional view showing a state in which the package 1 is completely opened. The "initial opening state" as used herein means a state in which the peeling surface of the agglomerated peeling does not reach the resin reservoir 6. As described above, the package body of the present embodiment obtained by heat-sealing the flange portion 25 of the container 2 and the lid member 3 from the opening start portion 4 is as shown in Fig. 7, and the lid member 3 is attached to the arrow of Fig. 7. The force F is applied in the direction. Thus, the surface layer 21 of the grainer 2 is agglomerated and peeled off by the force F' applied to the lid member 3. Further, when the cohesive peeling reaches the resin reservoir 6, the agglomeration of the surface layer 21 is carried out along the shape of the resin 143812.doc -16·201026501 62 formed on the surface layer 2 2 adjacent to the surface layer 2 i. Then, when the aggregation and peeling of the surface layer 21 reaches the vicinity X (also the cutting position) of the inner periphery of the sealing portion 262, the shape of the resin reservoir 63 formed in the sealing layer 31 of the lid member 3 is cut off. The resin of the surface layer 21 of the container 2 is 61. This makes the package! The opening of the container 2 and the lid member 3 is easy. [Effect of the embodiment] φ As described above, the thickness of the surface layer 21 of the multilayer sheet 20 constituting the container 2 of the present embodiment, and the polypropylene, the polypropylene resin, and the polyethylene resin contained in the surface layer 21 are specified. And the content ratio of the styrene-based polymer. The content of the polyethylene resin in the lower layer 22 is also specified. Therefore, the peeling surface which can be agglomerated and destroyed inside the surface layer 21 can be stabilized' to ensure easy opening and opening feeling. Further, since the agglutination peeling position is not deviated, the incorporation of the agglomerated portion can be prevented, and an aesthetically unsealed appearance can be achieved. Further, the heat resistance in a high temperature atmosphere can be improved, and the sheet can be prevented from adhering to the heating plate when the ruthenium plate is brought into contact during the hot forming. Therefore, stable productivity obtained by heat resistance without selecting a heating method of the thermoforming machine can be achieved. Further, it is possible to prevent the content of a large amount of oil, the filling at a high temperature, and the sheet at the time of reheating from melting, and the container 2 can be used without selecting a content, a storage method, or a conditioning method. Further, in the If shape in which the multilayer sheet 20 does not include the surface layer 22 and only the surface layer, if the lid sheet 3 is heat-sealed in the multilayer sheet 2, there is a case where the appearance is poor and the opening feeling is unsettled when the lid is opened. . i, since the surface layer 21 contains a dispersing agent, the dispersibility of the stupid vinyl polymer can be improved, and the appearance of the container 2 can be further improved by the unevenness of the surface layer 21 which is easily generated by the 143812.doc -17-201026501. The package 1 of the present embodiment is formed by heat-sealing the lid member 3 to the flange portion 25 of the container 2. The package 1 has an easy-opening property and a stable opening feeling, and the heat resistance and the appearance of the open cover are also good. Moreover, the resin reservoir 6 is formed in the vicinity of the opening 24 side of the package 1. Therefore, when the agglutination is carried out until the resin reservoir 6 is interposed, the stress of the peeling acts on the direction in which the lid member 3 is peeled off from the container 2, depending on the resin reservoir 6. Therefore, the lid member 3 and the flange portion 25 of the container 2 can be cut well, and the package 1 having good opening properties can be obtained. [Second Embodiment] The package body of the first embodiment described above is a case where the surface layer 21 of the barrage 2 is agglomerated and peeled off when the container 2 and the lid member 3 are opened. On the other hand, as shown in FIG. 9 and FIG. 2, the package body 1a of the second embodiment is a first embodiment in which the sealing layer 31 of the lid member 3 is agglomerated and peeled off when the container 2 and the lid member 3 are opened. Different forms. In the present embodiment, the same configurations and the same reference numerals are given to the same components as those in the first embodiment, and the description thereof is omitted or simplified. Fig. 9 is a cross-sectional view showing a state in which the package u of the present embodiment is initially opened. Fig. 10 is a cross-sectional view showing a state in which the package la is completely unsealed. As shown in FIG. 9 and FIG. 1A, when the sealing layer of the lid member 3 constituting the package 13 is agglomerated and the lid member 3 is peeled off, the material constituting the sealing layer 3 is the same as the surface layer 21 described above. The configuration is the same as the intermediate layer 32 described above. 143812.doc -18 - 201026501 In this case, as the surface layer 21 of the container 2, a polyolefin resin such as a polypropylene resin or a polyethylene resin or a blended resin can be used. In the case where such a sealing layer 31 is used for the cover member 3, and the surface layer 21 is used for the container 2 to heat seal the two, the two layers 21, 31 may be fused, and on the other hand, the stress will be applied when unsealing. The sealing layer 31 of the weaker cover member 3 is agglomerated and broken, and the sealing can be performed well.

將本實施形態之包裝體la從開封開始部4開封時，如圖9 所不’係對蓋材3於圖9之箭頭方向施加力ρ。如此，藉由對蓋材3施加之力F，進行蓋材3之密封層31之凝集剝離。且，該凝集剝離到達樹脂積存部6時，該密封層3丨之凝集剝離係沿與該密封層3 1熱封之容器2之表面層21上所形成之樹脂積存61的形狀而進行。蓋材3之密封層3 1之凝集剝離到達至密封部262之内周緣附近X(亦為切斷位置）後，將密封層3丨之樹脂積存63切斷。藉此可容易地進行包裝體1之容器2與蓋材3之開封。 [實施形態之變形] 另’以上說明之態樣僅係本發明之一態樣，本發明並非限定於上述實施形態’當然’具備本發明之構成、可達成目的及效果之範圍内之變形或改良，皆視為包含於本發明之内容。又，實施本發明時之具體結構及形狀等，在可達成本發明之目的及效果之範圍内’亦可為其他結構或形狀等。 ^ 本實施形態之多層片材20及容器2係具備表面層21、表下層22及基材層23之構成，但不限於此。 143812.doc •19· 201026501 例如，亦可不設置基材層，而由表面層21、表下層22之兩層構成。即，表下層22可為基材層而構成。又’本實施形態之多層片材20及容器2之基材層23係顯示具備第1基材層23E、第1接著層23D、氣體阻隔層23C、第2接著層23B、第2基材層23A之構成，但不限於此。例如，如圖11所示’基材層23亦可僅由第1基材層23E構成。即，多層片材20及容器2亦可為至少包含表面層21及表下層22之兩層以上的多層構成。且，本實施形態中，分別顯示有容器2之表面層21凝集剝離之態樣及蓋材3之密封層3 1凝集剝離之態樣，然而本發明亦包含在開封時將容器2之表面層21與蓋材3之密封層 3 1兩層凝集破壞而開封之情形。另’在實施本發明之易開封性容器之製造方法而製造圖 2A、圖2B及圖3所示之構成的易開封性容器的情形下，根據情形’除了於環狀密封盤7之内周緣所接觸之位置對應之部分所形成之樹脂積存部6以外，亦可於該密封盤7之外周緣所接觸之位置對應之部分形成樹脂積存。由於内周緣形成之樹脂積存大於外周緣形成之樹脂積存，故可維持良好的易開封性與高密封性。另外，本發明之實施中之具體結構及形狀等只要在可達成本發明之目的之範圍内亦可為其他結構等。 [實施例] 其後舉出實把例及比較例進一步詳細說明本發明，但本 143812.doc -20- 201026501 發明並未絲毫制約於該等實施例等之記載内容。 [實施例1 -1 ~實施例5、比較例1 _ 1〜比較例5-2] 圖12A及圖1 2B係顯示在實施例及比較例中實施之開封強度及密封強度之測定位置的模式圖。 (1)容器之製造： — 藉由共押出成形，將包含其後之表面層/表面下層/基材層之厚度為600 μιη的積層體成形。When the package body 1a of the present embodiment is unsealed from the unsealing start portion 4, the force ρ is applied to the lid member 3 in the direction of the arrow in Fig. 9 as shown in Fig. 9 . Thus, the adhesion layer F of the lid member 3 is agglomerated and peeled off by the force F applied to the lid member 3. Further, when the agglutination peeling reaches the resin reservoir 6, the agglomerating and peeling of the sealing layer 3 is performed along the shape of the resin reservoir 61 formed on the surface layer 21 of the container 2 which is heat-sealed to the sealing layer 31. When the agglomerated peeling of the sealing layer 3 1 of the lid member 3 reaches the vicinity of the inner periphery of the sealing portion 262 (also the cutting position), the resin reservoir 63 of the sealing layer 3 is cut. Thereby, the opening of the container 2 and the lid member 3 of the package 1 can be easily performed. [Modifications of the Embodiments] The above description is merely an aspect of the present invention, and the present invention is not limited to the above-described embodiments, and of course, the configuration of the present invention, the deformation within the scope of the object and the effects, or Improvements are considered to be included in the present invention. Further, the specific structure, shape, and the like of the present invention may be other structures or shapes within the scope of the purpose and effect of the invention. The multilayer sheet 20 and the container 2 of the present embodiment include the surface layer 21, the surface layer 22, and the base layer 23, but are not limited thereto. 143812.doc •19· 201026501 For example, the base layer 21 and the lower surface layer 22 may be formed without providing a base material layer. That is, the under-surface layer 22 can be comprised as a base material layer. Further, the multilayer sheet 20 of the present embodiment and the base layer 23 of the container 2 are provided with the first base material layer 23E, the first adhesive layer 23D, the gas barrier layer 23C, the second adhesive layer 23B, and the second base material layer. The composition of 23A, but is not limited to this. For example, as shown in Fig. 11, the base material layer 23 may be composed only of the first base material layer 23E. That is, the multilayer sheet 20 and the container 2 may be formed of a plurality of layers including at least two of the surface layer 21 and the front and back layers 22. Further, in the present embodiment, the surface layer 21 of the container 2 is shown to be agglomerated and peeled off, and the sealing layer 31 of the lid member 3 is agglomerated and peeled off. However, the present invention also includes the surface layer of the container 2 at the time of opening. 21 and the sealing layer 3 1 of the cover material 3 are two layers of agglomerated damage and opened. Further, in the case where the easy-opening container of the configuration shown in Figs. 2A, 2B and 3 is produced by carrying out the method for producing the easy-opening container of the present invention, the inner circumference of the annular sealing disk 7 is excluded depending on the situation. In addition to the resin reservoir 6 formed by the portion corresponding to the contact position, resin may be deposited in a portion corresponding to the position at which the outer periphery of the sealing disk 7 contacts. Since the resin formed on the inner periphery is accumulated more than the resin formed on the outer periphery, good easy-opening property and high sealing property can be maintained. Further, the specific structure, shape, and the like in the practice of the present invention may be other structures or the like as long as the object of the invention can be achieved. [Examples] Hereinafter, the present invention will be described in more detail by way of examples and comparative examples. However, the invention is not limited to the description of the examples and the like. [Example 1-1 to Example 5, Comparative Example 1 _ 1 to Comparative Example 5-2] Fig. 12A and Fig. 1B show patterns of measurement positions of the unsealing strength and the sealing strength which were carried out in the examples and the comparative examples. Figure. (1) Manufacture of container: - A laminate comprising a surface layer/subsurface layer/substrate layer having a thickness of 600 μm was formed by co-extrusion molding.

(容器之構成）表面層及表下層係使用表i、2記載物。第2基材層（厚度）：聚丙烯（15〇μιη) 第2接著層（厚度）：接著性樹脂（5 氣體阻隔層（厚度）：乙烯_乙烯醇共聚物（ev〇h)(3〇第1接著層（厚度）：接著性樹脂（5 μιη) 第1基材層（厚度）：聚丙烯（300 μιη) 其後，藉由用該積層體實施模塞助壓真空成形法而將 13〇 mmx15〇 mmx3〇 _之附有凸緣的容器成形。另，古亥容器係以對於開口部具有寬15贿之凸緣部、且為大方形之托盤狀而形成。對於如此所得之容器之開口部周緣的凸緣部將包述構成之多層薄膜作為蓋材而載置，再用下述之密封停 =為密封盤而使用圖4所示之全周形成有傾二與曲面部之環狀密封盤(密封環)，將蓋材對著：部進行熱封，製造成本發明之包裝體。凸緣另’使用該構成之Μ與蓋材時，開封時可進行藉由办 143812.doc 21. 201026501 益之表面層之凝集破壞而進行剝離之凝集剝離。 (蓋材之構成）外層：聚對苯二甲酸乙二醇酯（ρΕΤ)(! 2 μπι) 中間層.聚醯胺（尼龍、Ny)( 1 5 μιη) 雄、封層· 5^乙稀（ΡΕ)(6〇 μπι)或聚丙婦（ΡΡ)(60 μπι) 外層、中間層、密封層之順序為PET/Ny/PE或PET/Ny/PP。 [實施例1-1〜4、比較例144-2之製造條件] (密封條件）密封溫度：200°C 密封壓力：100 kg/個時間：1.0秒熱封之次數：1次 (環狀密封盤之規格）费封寬：3 mm 傾斜角度Θ(傾斜面部71) : 6。 R加工（曲面部72): l.OmmR [實施例5 '比較例5-1、5-2之製造條件] (密封條件）密封溫度：200°C 密封壓力：200 kg/個時間：2.0秒熱封之次數：1次 (環狀密封盤之規格） mm 密封寬：3 143812.doc • 22- 201026501 傾斜角度Θ(傾斜面部71) : 6。 R加工（曲面部72) : 1.0 mmR [評價結果] 對如上所述而獲得之實施例〜5及比較例1-；1〜5_2之接著（密封）性、剝離強度' 開封感、外觀、耐熱性藉由下述之基準予以比較·評價。結果顯示於表1、2。 (密封強度） φ 如圖12B所示，將包裝體1之側邊部以15 mm寬切斷作為 '"式驗樣本，且將該樣本從凸緣部之内侧（容器本體之開口部側）朝外侧（凸緣部之外周緣側）（圖12B之箭頭方向）用自動繪圖拉伸試驗機，以18〇。剝離在3〇〇之條件下測疋。成驗係以n=8之條件進行。 (剝離強度）如圖12A所示，將包裝體i之角部（開封開始部）以15 _ ^切斷作為試驗樣本，且將該樣本從凸緣部之外側（凸緣 • 部之外周緣側）朝内側（容器本體之開口部側）（圖12A之箭頭方向）用自動繪圖拉伸試驗機，以l35。剝離在儿❹ 條件下測定。試驗係以n=6之條件進行。 (開封外觀）平7内谷係將開封後未發生明顯起毛或蓋材破損之情形「為A」 '將開封後發生起毛或蓋材之破損之情形作為 C」，而以2階段予以評價。 (耐熱性）、價内今係將未附著於設想容器成形時之熱板接觸加熱 >438l2.d〇c -23- 201026501 方式之170°C之加熱板的情形作為「A」、將未附著於 155°C之加熱板而附著於170°C之加熱板的情形作為「B」、將附著於155°C之加熱板之情形作為「C」，而以 3階段予以評價。 [表1] 實施例實施例實施例實施例實施例實施例實施例實施例 1-1 1-2 2-1 2-2 3-1 3-2 4 5 表面層添加(質量％) PP 70 75 62 70 70 PP系樹脂 3 5 3 3 3 PE系樹脂 18 11 26 18 18 苯乙烯系聚合物 9 9 9 9 9 表下層添加(質量％) PP 80 90 90 80 80 PE 20 10 10 20 20 表面層厚度（μπι) 50 100 100 50 50 蓋材密封層 PP PE PP PE PP PE 易剝離 PE 密封強度(Kg/15mm) 1.8 1.5 2.1 1.5 1.8 1.6 2.0 3.2 剝離強度(Kg/15mm) 1.0 0.6 12 0.7 0.9 0.6 1.1 0.6 外觀 A A A A A A A A 对熱性 A A A A B B A A 結果良好良好良好良好良好良好良好良好 [表2] 比較比較比較比較比較比較比較比較比較比較例例例例例例例例例例 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 5-1 5-2 PP 80 50 70 70 65 表面層添加 PP系樹脂 5 5 3 3 3 (質量％) PE系樹脂 6 36 18 18 14 苯乙烯系聚合物 9 9 9 9 18 表下層添加 PP 80 80 80 100 80 (質量％) PE 20 20 20 0 20 表面層厚度（μη) 50 50 250 50 50 蓋材密封層 PP PE PP PE PP PE PP PE PP PE 密封強度(Kg/15mm) 3.2 0.7 0.6 1.1 2.0 1.3 2.0 1.5 1.9 1.4 剝離強度(Kg/15mm) 2.0 0.3 0.3 0.5 1.3 0.6 1.2 0.7 1.0 0.6 開封外觀 C A A A C C C C A A 耐熱性 A A C C A A A A C C 結果木1 氺2 氺3 氺4 木5 氺6 氺7 *1 :與蓋材強接著，破壞蓋材而不剝離。 *2 :與蓋材之接著較弱，無密封性。 -24- 143812.doc 201026501 *3 .與蓋材之接著較弱，無密封性。耐熱性惡化。 *4 :性能良好，但耐熱性惡化。 *5 .開封面不安定，凝集破壞面散亂而發生起毛。 *6:表面層及表下層之層間與凝集破壞面發生起毛。打：性能良好，但耐熱性惡化。如表1、2所示，實施例^〜5中，综合判斷密封強度、剝離強度、開封外觀、耐熱性為良好。(Construction of Container) The surface layer and the subsurface layer are the materials described in Tables i and 2. Second base material layer (thickness): polypropylene (15 μm η) second adhesive layer (thickness): adhesive resin (5 gas barrier layer (thickness): ethylene _ vinyl alcohol copolymer (ev 〇 h) (3 〇 First adhesive layer (thickness): adhesive resin (5 μm) First base material layer (thickness): polypropylene (300 μm) Thereafter, by performing plug-assisted vacuum forming method using the laminated body, 13 The container having the flange attached to 〇mmx15〇mmx3〇_ is formed. The kobe container is formed in a tray shape having a wide flange portion for the opening portion and having a large square shape. The flange portion of the periphery of the opening portion is placed as a lid member in a multilayer film having a configuration as described above, and a ring of the second and the curved portion is formed over the entire circumference shown in FIG. Sealing disc (seal ring), the cover material is facing: the part is heat-sealed, and the package of the invention is manufactured. The flange can be used for the opening and closing of the lid when the lid is used. 21. 201026501 Agglutination and stripping of the surface layer due to agglomeration damage of the surface layer. Composition) Outer layer: Polyethylene terephthalate (ρΕΤ) (! 2 μπι) Intermediate layer. Polyamide (nylon, Ny) (1 5 μιη) Male, sealing layer 5^Ethyl (ΡΕ) 6〇μπι) or Polypropylene (ΡΡ) (60 μπι) The order of the outer layer, the intermediate layer, and the sealing layer is PET/Ny/PE or PET/Ny/PP. [Examples 1-1 to 4, Comparative Example 144-2 Manufacturing conditions] (sealing conditions) Sealing temperature: 200 ° C Sealing pressure: 100 kg / time: 1.0 seconds Number of heat seals: 1 time (specification of annular sealing disc) Fee width: 3 mm Tilt angle Θ ( Inclined surface portion 71): 6. R machining (curved surface portion 72): l.OmmR [Example 5 'Production conditions of Comparative Examples 5-1 and 5-2] (Sealing condition) Sealing temperature: 200 ° C Sealing pressure: 200 Kg / time: 2.0 seconds heat seal times: 1 time (annular seal plate specifications) mm seal width: 3 143812.doc • 22- 201026501 tilt angle Θ (inclined face 71): 6. R machining (surface part 72) : 1.0 mmR [Evaluation results] The following examples (Examples 5 to 5 and Comparative Examples 1 to 1 2) obtained by the above (sealing), peel strength, opening feeling, appearance, and heat resistance were as follows. It The results were compared and evaluated. The results are shown in Tables 1 and 2. (Sealing strength) φ As shown in Fig. 12B, the side portion of the package 1 was cut at a width of 15 mm as a '" test sample, and The sample was applied from the inner side of the flange portion (the opening side of the container body) to the outer side (the outer peripheral side of the flange portion) (the direction of the arrow in Fig. 12B) by an automatic drawing tensile tester at 18 inches. Peeling was measured under conditions of 3 Torr. The inspection system was carried out under the condition of n=8. (Peel Strength) As shown in Fig. 12A, the corner portion (opening start portion) of the package i was cut at 15 _ ^ as a test sample, and the sample was taken out from the outer side of the flange portion (the outer periphery of the flange portion) The side is directed to the inner side (the opening side of the container body) (the direction of the arrow in Fig. 12A) by an automatic drawing tensile tester at 1,35. Peeling was measured under conditions of daughter-in-law. The test was carried out under the conditions of n=6. (Opening Appearance) The case where the flat grain is not significantly fluffed or the cover material is broken after opening the seal. "A" "The case where the fluffing or the cover material is broken after the opening is taken as C" is evaluated in two stages. (heat resistance), the inside of the price is not attached to the hot plate at the time of molding the container, and the heating plate of 170 °C in the manner of heating = 438l2.d〇c -23- 201026501 is used as "A", and will not be The case where the hot plate attached to the hot plate of 155 ° C was adhered to the hot plate of 170 ° C was referred to as "B", and the case of the hot plate attached to 155 ° C was referred to as "C", and was evaluated in three stages. [Table 1] EXAMPLES EXAMPLES EXAMPLES EXAMPLES EXAMPLES EXAMPLES Examples 1-1 1-2 2-1 2-2 3-1 3-2 4 5 Surface layer addition (% by mass) PP 70 75 62 70 70 PP resin 3 5 3 3 3 PE resin 18 11 26 18 18 Styrene polymer 9 9 9 9 9 Subsurface addition (% by mass) PP 80 90 90 80 80 PE 20 10 10 20 20 Surface layer Thickness (μπι) 50 100 100 50 50 Cover material sealing layer PP PE PP PE PP PE Easy peeling PE Sealing strength (Kg/15mm) 1.8 1.5 2.1 1.5 1.8 1.6 2.0 3.2 Peel strength (Kg/15mm) 1.0 0.6 12 0.7 0.9 0.6 1.1 0.6 Appearance AAAAAAAA The results of the thermal AAAABBAA are good, good, good, good, good, good, good and good [Table 2] Comparison, comparison, comparison, comparison, comparison, example, example, example, example 1-1 1-2 2-1 2 -2 3-1 3-2 4-1 4-2 5-1 5-2 PP 80 50 70 70 65 Adding PP resin to the surface layer 5 5 3 3 3 (% by mass) PE resin 6 36 18 18 14 Benzene Vinyl polymer 9 9 9 9 18 Addition of the lower layer PP 80 80 80 100 80 (% by mass) PE 20 20 20 0 20 Surface Thickness (μη) 50 50 250 50 50 Cover material sealing layer PP PE PP PE PP PE PP PE PP PE Sealing strength (Kg/15mm) 3.2 0.7 0.6 1.1 2.0 1.3 2.0 1.5 1.9 1.4 Peel strength (Kg/15mm) 2.0 0.3 0.3 0.5 1.3 0.6 1.2 0.7 1.0 0.6 Unsealing appearance CAAACCCCAA Heat resistance AACCAAAACC Result wood 1 氺2 氺3 氺4 Wood 5 氺6 氺7 *1 : Strongly with the cover material, destroy the cover material without peeling off. *2 : It is weaker with the cover material and has no sealing. -24- 143812.doc 201026501 *3 . It is weaker with the cover material and has no sealing. The heat resistance is deteriorated. *4 : Performance is good, but heat resistance is deteriorated. *5. The open cover is not stable, and the agglutination damage surface is scattered and fluffing occurs. *6: Fringing occurs between the layers of the surface layer and the lower layer and the agglomerated failure surface. Hit: Performance is good, but heat resistance is deteriorated. As shown in Tables 1 and 2, in Examples 2 to 5, the sealing strength, the peel strength, the appearance of opening, and the heat resistance were comprehensively judged to be good.

另一方面，比較例1_1〜5-2中，如表2所示，其密封強度、剝離強度、開封外觀、耐熱性中至少任一項其評價為「C」。因此可知’藉由將表面層含有之ΡΡ、ρρ系樹脂、ρΕ系樹脂及笨乙烯系聚合物之含有量予以特定，且特定表下層之ΡΕ之含有量，再特定表面層之厚度，可使接著（密封）性、剝離強度、開封感、外觀、耐熱性變得良好。【圖式簡單說明】圖1係顯示本實施形態之多層片材之剖面圖；圖2 Α係顯示本發明之第1實施形態之易開封办。。丨土谷窃的圖’且係用蓋材密封之狀態；圖2B係顯示本發明之第1實施形態之易開封 ^ 器的圖’且係顯示從開封開始部將蓋材開封之狀態的概略圖. 圖3係第1實施形態之易開封性容器之開封開始部剖面圖；之密封步驟的模圖4係顯示第1實施形態之易開封性容器式圖； 143812.doc •25- 201026501 圖5係顯示第1實施形態之熱封時之密封盤與凸緣部之狀態的局部剖面圖；圖6係第1實施形態之環狀密封盤之局部放大圖；圖7係顯示將第1實施形態之易開封性容器初期開封之狀態的局部剖面圖；圖8係顯示將第1實施形態之易開封性容器完全開封之狀態的局部剖面圖；圖9係顯示將本發明之第2實施形態之易開封性容器初期開封之狀態的局部剖面圖；圖10係顯示將第2實施形態之易開封性容器完全開封之狀態的局部剖面圖；圖11係顯示另一實施形態之多層片材之剖面圖；圖12A係顯示實施例中所實施之開封強度之測定位置的模式圖；及 ^ 圖12B係顯示實施例中所實施之密封強度之測定位置的模式圖。 ' 【主要元件符號說明】 1 包裝體 la 包裝體 2 容器 3 蓋材 4 開封開始部 6 樹脂積存部 7 環狀密封盤 143812.doc 201026501On the other hand, in Comparative Examples 1_1 to 5-2, as shown in Table 2, at least one of the sealing strength, the peel strength, the opening appearance, and the heat resistance was evaluated as "C". Therefore, it is understood that the content of the ruthenium, the ρρ-based resin, the ρ-based resin, and the styrene-based polymer contained in the surface layer can be specified, and the content of the ruthenium of the specific surface layer can be specified, and the thickness of the surface layer can be specified. Then, (sealing property), peeling strength, opening feeling, appearance, and heat resistance were good. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a multilayer sheet of the present embodiment. Fig. 2 shows an easy opening and closing of the first embodiment of the present invention. . Fig. 2B is a view showing a state in which the lid member is sealed by the lid member. Fig. 2B is a view showing a state in which the lid member is opened from the opening start portion. Fig. 3 is a cross-sectional view showing the opening start portion of the easy-opening container of the first embodiment; and Fig. 4 of the sealing step is a view showing the easy-opening container of the first embodiment; 143812.doc • 25- 201026501 Fig. 5 FIG. 6 is a partial enlarged view showing the state of the sealing disk and the flange portion in the heat sealing of the first embodiment; FIG. 6 is a partial enlarged view of the annular sealing disk according to the first embodiment; A partial cross-sectional view showing a state in which the easy-opening container is initially opened; FIG. 8 is a partial cross-sectional view showing a state in which the easy-opening container of the first embodiment is completely opened; and FIG. 9 is a view showing a second embodiment of the present invention. FIG. 10 is a partial cross-sectional view showing a state in which the easy-opening container of the second embodiment is completely opened; FIG. 10 is a partial cross-sectional view showing a state in which the easy-opening container of the second embodiment is completely opened; and FIG. 11 is a cross-sectional view showing the multilayer sheet of another embodiment. ; FIG. 12A FIG display mode based measurement positions of the opening strength of embodiment examples of the embodiment; ^ FIG. 12B and FIG display mode based assay seal in the examples of embodiments intensity position. ' [Main component symbol description] 1 Package la package 2 Container 3 Cover material 4 Unpacking start part 6 Resin storage part 7 Ring sealing disk 143812.doc 201026501

7a 環狀密封盤 20 多層片材 21 表面層 22 表下層 23 基材層 23A 第2基材層 23B 第2接著層 23C 氣體阻隔層 23D 第1接著層 23E 第1基材層 24 開口部 25 凸緣部 26 密封部 31 密封層 32 中間層 33 外層 61 樹脂積存 62 樹脂積存 63 樹脂積存 71 傾斜面部 72 曲面部 73 前端 261 密封部 262 密封部 143812.doc •277a annular sealing disk 20 multilayer sheet 21 surface layer 22 surface lower layer 23 base material layer 23A second base material layer 23B second second layer 23C gas barrier layer 23D first back layer 23E first base material layer 24 opening portion 25 convex Edge portion 26 sealing portion 31 sealing layer 32 intermediate layer 33 outer layer 61 resin accumulation 62 resin accumulation 63 resin accumulation 71 inclined surface portion 72 curved surface portion 73 front end 261 sealing portion 262 sealing portion 143812.doc • 27

Claims

201026501 七、申請專利範圍： 1. 一種多層片材，其特徵為：其係含有表面層、及鄰接於該表面層而積層之表下層而構成者，且，上述表面層之厚度尺寸係 1 μιη〜200 μηι ; 上述表面層之構成係包含聚丙烯、聚丙烯系樹脂、聚乙稀系樹脂、及苯乙烯系聚合物； ❼ 該等聚丙烯、聚丙烯系樹脂、聚乙烯系樹脂及苯乙烯系聚合物之含有率分別係6〇質量％以上8〇質量％以下、1 質量°/。以上1 0質量％以下、8質量％以上28質量❶/。以下、及4質量。/。以上14質量％以下；又，上述表下層係含有聚乙烯系樹脂，該聚乙烯系樹脂之 *含有率係5質量％以上50質量％以下。 2. —種多層片材’其特徵為：其係含有表面層、及鄰接於該表面層而積層之基材層 Α 而構成者，且，上述表面層之厚度尺寸係1 μιη〜2〇〇 μηι ; 上述表面層之構成係包含聚丙烯、聚丙烯系樹脂、聚 • 乙烯系樹脂、及苯乙稀系聚合物；該等聚丙烯、聚丙烯系樹脂、聚乙烯系樹脂及苯乙烯系聚合物之含有率分別係60質量％以上80質量％以下、i 質量％以上1 0質量％以下、8質量％以上28質量％以下、及4質量％以上14質量％以下；又，上述基材層係含有聚乙烯系樹脂，該聚乙烯系樹脂之 143812.doc 201026501 含有率係5質量％以上5 0質量％以下。 3. 如請求項1之多層片材，其中於上述表面層含有分散劑。 4. 如請求項2之多層片材，其中於上述表面層含有分散劑。 5. 如請求項1之多層片材，其中上述苯乙烯系聚合物係笨乙烯-乙烯丁烯苯乙烯嵌段共聚物。 6. 如請求項2之多層片材，其中上述苯乙烯系聚合物係笨乙稀-乙烯丁烯苯乙烯嵌段共聚物。 7. 如請求項3之多層片材，其中上述苯乙締系聚合物係笨乙稀-乙烯丁烯苯乙烯嵌段共聚物。 8. 如請求項4之多層#材，其中上述笨乙稀系聚合物係笨乙烯-乙烯丁烯苯乙烯嵌段共聚物。 9. 一種熱成形容器，其特徵為：其係藉由將睛求項1至請求項8中任一項之多層片材予以熱成形而獲得，且具有開口部者，且，於上述開口部之周邊形成有凸緣部。 10. 一種易開封性包裝體，其特徵為具備：請求項9之容器；及將上述容器之開口部以封閉之狀態熔著之蓋材。 11. 如請求項H)之易開封性包震體，其中於上述凸緣部之開口部側附近形成樹脂積存部。 143812.doc201026501 VII. Patent application scope: 1. A multi-layer sheet characterized in that it comprises a surface layer and a surface layer adjacent to the surface layer, and the thickness of the surface layer is 1 μm. ～200 μηι ; The surface layer is composed of polypropylene, a polypropylene resin, a polyethylene resin, and a styrene polymer; ❼ these polypropylene, polypropylene resin, polyethylene resin, and styrene The content of the polymer is 6% by mass or more and 8% by mass or less, and 1% by mass. The above 10% by mass or less, 8% by mass or more and 28% by mass. The following, and 4 quality. /. The above-mentioned surface lower layer contains a polyethylene-based resin, and the content of the polyethylene-based resin is 5% by mass or more and 50% by mass or less. 2. A multilayer sheet characterized in that it comprises a surface layer and a base layer layer laminated adjacent to the surface layer, and the thickness of the surface layer is 1 μm 2 to 2 〇〇. The structure of the surface layer includes polypropylene, a polypropylene resin, a poly-vinyl resin, and a styrene-based polymer; the polypropylene, the polypropylene resin, the polyethylene resin, and the styrene polymerization. The content of the material is 60% by mass or more and 80% by mass or less, i% by mass or more and 10% by mass or less, 8% by mass or more and 28% by mass or less, and 4% by mass or more and 14% by mass or less. A polyethylene-based resin is contained, and the content of the polyethylene resin 143812.doc 201026501 is 5% by mass or more and 50% by mass or less. 3. The multilayer sheet of claim 1, wherein the surface layer contains a dispersing agent. 4. The multilayer sheet of claim 2, wherein the surface layer contains a dispersing agent. 5. The multilayer sheet according to claim 1, wherein the styrenic polymer is a stupid ethylene-ethylene butylene styrene block copolymer. 6. The multilayer sheet according to claim 2, wherein the styrenic polymer is a stearky-ethylene butylene styrene block copolymer. 7. The multilayer sheet according to claim 3, wherein the styrene-based polymer is a stearky-ethylene butylene styrene block copolymer. 8. The multilayer material of claim 4, wherein the above-mentioned stupid ethylene polymer is a stupid ethylene-ethylene butylene styrene block copolymer. A thermoformed container obtained by thermoforming a multilayer sheet according to any one of Claims 1 to 8, and having an opening, and in the opening A flange portion is formed around the periphery. An easy-opening package comprising: a container of claim 9; and a lid member that fused the opening of the container in a closed state. 11. The easy-opening shock absorber according to claim H), wherein a resin reservoir is formed in the vicinity of the opening portion side of the flange portion. 143812.doc