CN109863093A - 单铝显窃启指示拉片式密封构件 - Google Patents

单铝显窃启指示拉片式密封构件 Download PDF

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CN109863093A
CN109863093A CN201780065544.8A CN201780065544A CN109863093A CN 109863093 A CN109863093 A CN 109863093A CN 201780065544 A CN201780065544 A CN 201780065544A CN 109863093 A CN109863093 A CN 109863093A
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罗伯特·威廉·托尔斯滕森-沃尔
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Abstract

一种用于密封到围绕容器开口的边缘的显窃启拉片式密封构件，该密封构件包括多层层压件，该多层层压件被配置为在移除密封件时隔离保留在容器平台区域上的残余材料环。

Description

单铝显窃启指示拉片式密封构件
相关申请的交叉参考
本申请要求2016年10月28日提交的美国临时申请No.62/414,547的优先权。
技术领域
本公开涉及用作容器上的二级封闭件的密封构件，更具体地，涉及显窃启指示拉片式密封构件。
背景技术
通常期望使用可移除或可剥离的密封件、密封构件或内部密封件以密封容器的开口。然后通常将盖子或其他封闭件拧紧或放置在容器开口上，从而将密封构件捕获在其中。在使用中，使用者通常移除盖子或其他封闭件以接近密封构件，然后从容器中移除或以其他方式剥离密封件以便分配或获得其内容物。
在一些情况下，内部密封件提供显窃启证据，由此密封件的一部分保留在容器上作为密封构件已移除或篡改的证据。例如，在从容器移除密封构件时，形成密封构件的层压件被设计为破裂并在容器口部上留下碎片以指示封装已打开。此类显窃启拉片式衬垫的先前示例导致层压件直接在容器上留下碎片，这取决于拉片的放置。例如，如果拉片在密封构件的顶部并且完全限定在其周边内并且覆盖约50％的密封件，那么先前密封件通常在容器平台区域上留下碎片并且还覆盖约50％的容器开口。然后使用者将需要移除该剩余的密封部分以便有效地使用容器，移除该剩余的密封部分倾向于对某些使用者和在某些应用程序中造成麻烦。
附图说明
图1是本公开的示例性拉片式密封构件的分解截面图；
图2是本公开的拉片式密封构件的分解截面图，该图具有将留在容器边缘平台区域上的残余材料的相对位置；
图3是本公开的示例性拉片式密封构件的分解截面图；
图4是本公开的拉片式密封构件的分解截面图，该图具有将留在容器边缘平台区域上的残余材料的相对位置；
图5是示出从容器移除的拉片式密封构件的图像，其中残余材料留在容器边缘平台区域上；
图6是本公开的另一个示例性拉片式密封构件的分解截面图；
图7是本公开的另一个示例性拉片式密封构件的分解截面图；以及
图8是示出从容器移除的另一个拉片式密封构件的图像，其中残余材料留在容器边缘平台区域上。
具体实施方式
本公开通常涉及具有完全限定在密封件周边内的握持拉片的拉片式密封构件，该握持拉片还被配置为提供显窃启证据。本文的密封构件消除由先前的显窃启顶部拉片式内部密封件留下的过多碎片。在一个方面，本文的密封构件被布置和配置为在由拉片将密封构件经从容器移除之后将残余的碎片隔离到容器边缘的平台区域，而不依赖于在密封构件顶表面上的拉片的尺寸或位置。在另一个方面，本文的拉片式密封构件利用独特的分层组件以帮助实现在容器边缘上留为密封剂和铝层的环的隔离碎片。
在优选的方法中，层压件被配置为在从容器中移除时留下隔离到容器口部的密封剂残余物和铝残留物，该容器口部控制打开后剩余在容器上的残余衬垫的量。优选地，隔离的残留物是密封剂和铝层的薄环形圈。减小平台区域以及在容器口部中形成阶状件有助于减小该设计的移除力。也就是说，可减小容器边缘平台区域的顶表面积。分离功能由基层中铝的规格和层之间的粘合剂的选择控制。
通过一种方法，拉片式密封构件包括基础箔层和密封剂部件的层压，该密封剂部件粘结到支撑件以形成显窃启子结构。粘结可通过挤出层压或热层压进行。然后可将任选的层施加到显窃启子结构，诸如泡沫层、非泡沫聚合物层和各种拉片部件以形成显窃启密封构件，该密封构件被配置为将残余碎片隔离到容器边缘。
为简单起见，本公开通常可指容器或瓶子，但是本文中的密封构件可施加于任何类型的容器、瓶子、封装件或具有围绕通向内腔的通路的边缘或口的其他装置。在本公开中，对密封构件的部件的上表面和下表面以及层的参考指的是如图中通常所示的部件的取向，并且当密封构件在使用中时，容器处于直立位置并且具有在容器顶部的开口。首先将总体描述密封构件的不同方法，然后将解释各种构造和材料的更多细节。应当理解，在一些情况下，本文所述的密封构件在单件式或两件式密封构件配置中都起作用。单件式密封构件通常仅包括粘结到容器边缘的密封构件。也可使用盖子或封闭件。两件式密封构件包括临时粘结到衬垫的密封构件。在这种构造中，密封构件粘结到容器的边缘，并且衬垫被配置为在加热期间与密封构件隔离以保留在盖子或在容器上使用的其他封闭件中。例如，在两件式构造中，例如蜡层可用于将密封构件临时粘结到衬垫。其他类型的可释放层也可用于在密封件和衬垫之间提供临时粘结，但可释放层通常是热活化的。
转到图1，示出显窃启拉片式密封构件10的一个示例。密封件10包括上部层压件12，上部层压件12经由部分粘结部16粘结到下部层压件14以形成完全限定在密封件周边内的握持拉片17。在这种方法中，密封件还包括部分层或拉片料18以帮助形成拉片17。拉片料18粘结到上部层压件12中的层但不粘结到下部层压件14中的层。此外，如图1所示，在一种方法中，拉片式密封构件10还可包括纸浆背衬19和蜡层21。一旦安装在容器上，纸浆背衬19和/或蜡层21可与密封构件10的其余部分隔离以允许用户接近拉片17。
上部层压件12还可包括聚合物膜支撑层20以提供结构支撑，以及共聚物层或粘合层22以将聚合物膜20粘结到下部层压件14。在此，膜20经由粘结层22部分地粘结到拉片料18并且部分粘合到下部层压件。
支撑膜层20可为聚对苯二甲酸乙二醇酯(PET)、尼龙、聚烯烃或其他结构聚合物层，并且在一些方法中，可为约0.5密耳至约2.5密耳厚。
当使用拉片料18时，拉片料17经由拉片料18限定或形成，拉片料18仅在上部层压件12的一部分上延伸。更具体地，拉片料18形成拉片17，因为拉片料18粘结到粘结层22并且通常防止层20(和上面的任何层)在其至少一部分上粘附到下部密封层压件14(或其间的任何层)的上表面。拉片料18的底表面与下部层压件14的上表面相邻但不粘结，以形成拉片17。
在一个方面，拉片料18由聚酯诸如聚对苯二甲酸乙二醇酯(PET)或纸形成。通过一种可选的方法，拉片料18的下表面可涂覆有释放材料，例如硅酮。任选的释放涂层使得在热密封或感应热密封过程期间拉片料18将粘附到下部层压件14的上表面的可能性最小化。拉片料18允许拉片结构17沿边界线枢转或向上铰接以形成拉片17。通过这种方法，拉片料18和成形拉片17完全限定在密封件的圆周或周边内。
粘结层22可包括可粘附地粘结、热活化或加热以实现其粘结特性或施加于密封件的任何聚合物材料。通过一种方法，粘结层22可选自乙烯-乙酸乙烯酯(EVA)、聚烯烃、双组分聚氨酯、乙烯丙烯酸共聚物、可固化的双组分聚氨酯粘合剂、环氧粘合剂、乙烯-甲基丙烯酸酯共聚物等粘结材料。如图所示，活化的粘结层22在层压件节段12的整个宽度上延伸。在其他方法中，层压件12可仅包括部分粘合剂层，因此不使用上面论述的拉片料层18。
通过一种方法，粘结层22是乙酸乙烯酯含量为约20％至约28％的EVA，其中残余单体为乙烯以便实现粘结强度以将上部层压件牢固地保持到下部层压件。在一些情况下，乙酸乙烯酯含量低于20％不足以形成本文所述的坚固结构。通过一种方法，粘结层22可为约0.5密耳至约3.5密耳的EVA，在其他方法中约0.5密耳至约2.5密耳的EVA，在其他方法中，约0.5密耳至约1.5密耳的EVA，并且在其他方法中，约0.5密耳至约1.0密耳的EVA；然而，厚度可根据特定施加的需要而变化，以实现期望的粘结和内部强度。
下部层压件14形成独特的显窃启密封构件10的显窃启子结构。该子结构包括下密封剂或热密封层30，该下密封剂或热密封层30可由适于粘结到容器边缘的任何材料构成，诸如但不限于感应、传导或直接粘结的方法。用于热可密封层30的合适的粘合剂、热熔粘合剂或密封剂包括但不限于聚酯、聚烯烃、乙烯-乙酸乙烯酯，乙烯-丙烯酸共聚物、surlyn、离聚物和其他合适的材料。通过一种方法，热可密封层可为厚度约0.2密耳至约3密耳的此类材料的单层或多层结构。通过一些方法，选择热可密封层以具有与容器的组合物类似和/或包括与容器的组合物相同的聚合物类型的组成。例如，如果容器包含聚乙烯，则热密封层也将含有聚乙烯。如果容器包含聚丙烯，则热密封层也将含有聚丙烯。其他类似的材料组合也是可能的。通过一种方法，密封层30为约1密耳至约2密耳厚，或者在一些方法中，为约1.5密耳厚的中密度聚乙烯薄膜(在一些情况下约0.92g/cm至约0.94g/cm，但可根据需要为其他密度)。
接下来，密封构件包括粘结层36(或热熔粘合剂)。通过选择该粘结层36可影响密封构件的正确分离以将残余物隔离到容器平台区域。该层的厚度也有助于实现本文密封件的独特功能。热熔层可具有约1密耳至约3密耳的厚度。层36有助于维持层压完整性以将密封部件保持在一起。用于粘结层36的材料的合适示例包括具有高乙酸乙烯酯组合物(诸如约20％至约40％)的共挤出聚乙烯/EVA密封剂。用于粘结层36的其他合适材料可包括EVA热熔体、EAA涂层或PET热密封膜。在一种特定形式中，粘结层36是基于EVA的热熔物。
在粘结层36上方存在箔部件或膜层38和上部聚合物支撑部件40。膜层38可为被配置为向密封件10提供感应加热和/或阻挡特性的一个或多个层。被配置为提供感应加热的层是能够在暴露于感应电流时产生热的任何层，其中在层中的涡电流产生热。通过一种方法，膜38可为金属层，诸如铝箔、锡等。在其他方法中，膜层可为与感应加热层组合的聚合物层。膜层38还可为或包括大气阻挡层，该大气阻挡层能够至少从密封容器的外部到内部延缓气体和水分的迁移，并且在一些情况下，还同时提供感应加热。因此，膜层38可为被配置为提供此类功能的一个或更多个层。通过一种方法，膜层38为约0.3密耳至约2密耳的金属箔，诸如铝箔，该金属箔能够提供感应加热并用作大气屏障。在一种特定方法中，构件层38是1密耳厚的铝箔。在降低基础箔层压件或子结构中的铝部件的规格方面存在一些优点。较薄的铝箔更容易破裂并且使用较薄的箔减小使用者从容器上剥离衬垫所需的力。在一些方法中，膜层38比下部热密封层薄。
上部聚合物支撑部件40可为膜、泡沫或其他支撑材料。例如，部件40可为聚合物泡沫或非发泡聚合物膜，诸如聚烯烃，或聚酯膜或泡沫。在一种形式中，聚合物支撑部件40可包括多个层，诸如例如PET层和粘合剂层，诸如EVA。根据一种形式，聚合物支撑层40包括具有无定形PET部分和结晶PET部分的共挤出PET层。此外，该形式还可包括与共挤出的PET层组合的EVA层。
在又一种形式中，部件40可为绝缘层或热再分配层。在一种形式中，部件40可包括发泡聚合物层。合适的发泡聚合物包括发泡聚烯烃、发泡聚丙烯、发泡聚乙烯和聚酯泡沫。在一些形式中，这些泡沫通常具有约2000g/in至约3500g/in的内部破裂强度。在一些方法中，发泡聚合物层106还可具有小于0.6g/cc的密度，并且在一些情况下，具有约0.4g/cc至小于约0.6g/cc的密度。在其他方法中，密度可为约0.4g/cc至约0.9g/cc。发泡聚合物层的厚度可为约1密耳至约5密耳。
在一些方法中，保留在容器上的密封层的破坏或破裂力与容器的容器平台区域上可用的密封剂区域成比例。
图2示出本文的拉片式密封构件的替代实施例。图2中的各个层与图1类似，并且不再进一步描述。图2中的层中的一些的厚度可以不同，诸如0.5密耳或更小的箔层，但可与上述相同。
图2还示出在移除密封构件以隔离容器平台区域上的残余物时层压件破裂的位置。层压件在50处分离，其中支撑部件40从容器边缘平台区域(通常显示为51)上方的膜层38剥离。然后，膜层38、粘结层36和下部密封剂30沿容器边缘的内边沿围绕边缘在内部54破裂。如图5的图像中最佳所示，该分离将密封构件残余物60隔离为容器边缘上的材料环。
应当理解，可选择各层之间的粘结强度以及层的撕裂强度，使得下部层压件的一部分破裂以在容器边缘上提供残余的材料环。在这种形式中，显窃启下部层压件子子结构中各层之间的粘结强度大于显窃启下部层压件子结构中除上部聚合物支撑层之外的层的撕裂强度，使得在从容器移除密封构件时，上部聚合物支撑层与主金属层的至少一部分分离，以隔离包括最下面的热密封层、粘结层和主金属层的容器平台区域上的残留材料环。
此外，如图2所示，上部聚合物支撑件40之间的粘结强度小于膜层38、粘结层36和热密封件30之间的粘结。在这种形式中，膜层38、粘结层36和热密封件30的最外部分维持粘结到容器，同时聚合物支撑件40在最外边沿处与箔38分离，同时维持从最外边沿向内到箔层38的粘结。在这种形式中，来自从最外边沿向内定位的膜层38、粘结层36和热密封件30的破裂材料将维持粘结到上部聚合物支撑件40。
在一些方法中，当密封到容器边缘时，密封构件的小突出部或环形凸缘延伸超过容器边缘。在一些方法中，该突出部可为约1mm至约3mm。在其他方法中，容器口部可向内成阶梯状，使得上部平台面积减小，从而形成材料的突出部。该材料突出部通常在图5中示出。
在一些方法中，以下特征限定本文中的密封构件。上面在附图中描述并在下面论述的密封构件的各种特征和限制不是所提到的密封构件所独有的，而是可包括在其任何组合中。本文提到的密封件或容器的方面或实施例并非旨在暗示此类方面或实施例与所有其他方面或实施例互相排斥。换句话说，如本文所述的各种特征可根据特定施加的需要以各种组合联合，并且在一个段落中的特征可根据需要与其他段落中的特征组合。
图3和图4中示出另外的实施例。图3中所示的实施例与图1中所示的实施例的不同之处在于，图3中的实施例不包括纸浆层或蜡层。应当理解，图3中的各种层与图1类似并且将不再进一步描述。
图6中示出又一个实施例，该实施例具有超出图3中的实施例中所示的附加特征的附加特征。例如，图6中的实施例包括有色聚合物层32。当拉片式密封件移除时，该有色聚合物层32可提供进一步的显窃启指示。
有色聚合物层32可采用各种形式，诸如中密度聚乙烯层。有色聚合物层32也可与一个或多个层共挤出和/或可以其他方式粘附到下部层压件14中的一个或多个层。例如，在一种形式中，有色聚合物层32可诸如在34处粘附到热密封件。此外，有色聚合物层32可位于下部层压件14中的其他位置，只要有色聚合物层撕裂以提供进一步的显窃启指示。例如，如图8所示，当移除密封件时，有色聚合物层32的一部分在平台区域上可见，诸如在62处，并且在密封件的移除部分上可见，诸如在64处。有色聚合物层32可包括与层压件中的其他层中的至少一些的颜色形成对比的颜色。
图7中示出又一个实施例。该实施例类似于图1的实施例，其中包括纸浆层19和蜡层21。该实施例还包括有色聚合物层32并且提供与图6和图8中所述类似的功能。应当理解，图7中的各种层类似于图1和图6并且将不再进一步描述。
在一种形式、实施例或版本中，提供用于密封到围绕容器开口的边缘的显窃启拉片式密封构件，该密封构件包括一个或多个箔层。该密封构件可包括多层层压件，该层压件具有部分地粘结到显窃启下部层压件子结构的上部层压件，以在上部层压件部分中形成完全限定在密封构件的周边内的握持拉片。握持拉片被配置为用于从容器开口移除密封构件。在握持拉片下方的显窃启下部层压件子结构至少包括用于粘结到容器边缘的热密封层、被定位成用于加热热密封层的主金属层、粘结层和上部聚合物支撑层；并且当密封构件从容器移除时，金属层和热密封层与聚合物支撑层分离以隔离保留在容器平台区域上的残余材料环。
上面的显窃启拉片式密封构件还可包括与拉片的尺寸或位置无关的隔离的残余材料环，其中上部聚合物支撑层是聚烯烃膜或聚烯烃泡沫层或包括膜和泡沫部件的多层层压件，其中热密封层是聚酯、聚烯烃、乙烯-乙酸乙烯酯、乙烯-丙烯酸共聚物、离聚物、中密度聚乙烯及其组合，其中下部热密封层的厚度为约0.2密耳至约3密耳，其中主金属层比热密封层薄，其中主金属层的厚度为约0.3密耳至约2密耳，其中聚合物支撑部件与金属层的粘结至少在容器边缘平台区域上方的部分中小于聚合物支撑部件与上部层压件粘结层的粘结，进一步包括由于拉片料粘结到上部层压件但不粘结到在拉片料下方的显窃启下部层压件子结构，和/或上述特征的任何组合。
在形式、实施例或版本中，描述具有箔层显窃启拉片式密封构件的密封容器。该密封容器可包括由壁限定的容器，并且该容器具有向内阶梯状的口部，该口部具有围绕容器开口的上部平台区域，向内阶梯状的口部的上部平台区域比容器壁薄。容器还可以包括密封到上部平台区域边缘的显窃启拉片式密封构件，该显窃启拉片式密封构件包括多层层压件，该多层层压件包括部分地粘结到显窃启下部层压件子结构的上部层压件部分以在上部层压件部分中形成完全限定在密封构件周边内的握持拉片，握持拉片用于从容器开口移除密封构件；并且握持拉片下方的显窃启下部层压件子结构至少包括用于粘结到容器边缘的热密封层、被定位成用于加热热密封层的金属层、主金属层上方的粘结层和上部聚合物支撑层。在密封构件从容器移除时，主金属层和粘结层的一部分与聚合物支撑部件分离以隔离保留在容器平台区域上的残余材料环。
容器还可包括与拉片的尺寸或位置无关的隔离的残余材料环，其中上部聚合物支撑层是聚烯烃膜或聚烯烃泡沫层或包括薄膜和泡沫部件的多层层压件，其中热密封层为聚酯、聚烯烃、乙烯-乙酸乙烯酯、乙烯-丙烯酸共聚物、离聚物、中密度聚乙烯及其组合，其中下部热密封层厚度为约0.2密耳至约3密耳，其中金属层比热密封层薄，其中金属层的厚度为约0.3密耳至约2密耳，其中聚合物支撑部件与金属层的粘结至少在容器边缘平台区域上方的部分中小于聚合物支撑部件与上部层压粘结层的粘结。密封容器还可包括如上所述的拉片料。
应当理解，为解释产品和方法的性质，本文已经描述和说明过程、衬垫、密封件及其组合的细节、材料和布置的各种变化，这些变化由本领域技术人员在所附权利要求中表达的实施产品的原理和范围内进行。例如，密封件可包括层压件内的以及针对特定应用根据需要示出和描述的各层之间的其他层。如果需要，也可使用附图中未示出的粘合剂层以将各层固定在一起。除非本文另有说明，否则所有部分和百分比按重量计。

Claims (20)

1.一种显窃启拉片式密封构件，所述密封构件用于密封到围绕容器开口的边缘，所述密封构件包括：
多层层压件，所述多层层压件包括部分粘结到显窃启下部层压件子结构的上部层压件部分，以经由所述上部层压件部分和所述下部层压件子结构之间的未粘结部分形成握持拉片，所述拉片完全限定在所述密封构件的周边内，所述握持拉片用于从容器开口移除所述密封构件；
所述显窃启下部层压件子结构位于所述握持拉片下方并且至少包括用于粘结到所述容器边缘的热密封层、被定位成用于加热所述热密封层的主金属层、在所述主金属层下面的粘结层和上部聚合物支撑层；以及
在从容器移除所述密封构件时，所述上部聚合物支撑层与所述主金属层的至少一部分分离以隔离包含来自所述主金属层、所述热密封层，以及所述粘结层的材料的所述容器平台区域上的残余材料环。
2.根据权利要求1所述的显窃启拉片式密封构件，其中所述隔离的残余材料环与所述拉片的所述尺寸或位置无关。
3.根据任一前述权利要求所述的显窃启拉片式密封构件，其中所述上部聚合物支撑层是聚烯烃膜或聚烯烃泡沫层或包括膜和泡沫组分的多层层压件。
4.根据任一前述权利要求所述的显窃启拉片式密封构件，其中所述热密封层是聚酯、聚烯烃、乙烯-乙酸乙烯酯、乙烯-丙烯酸共聚物、离聚物、中密度聚乙烯，以及它们的组合。
5.根据任一前述权利要求所述的显窃启拉片式密封构件，其中所述下部热密封层的厚度为约0.2密耳至约3密耳。
6.根据任一前述权利要求所述的显窃启拉片式密封构件，其中所述主金属层比所述热密封层薄。
7.根据任一前述权利要求所述的显窃启拉片式密封构件，其中所述主金属层的厚度为约0.3密耳至约2密耳。
8.根据任一前述权利要求所述的显窃启拉片式密封构件，其中所述聚合物支撑层与所述主金属层的粘结强度在所述容器边缘平台区域上方的部分中小于所述聚合物支撑层与所述上部层压件部分的粘合强度。
9.根据任一前述权利要求所述的显窃启拉片式密封构件，进一步包括形成所述拉片的一部分的部分层拉片料，其中所述拉片料粘结到所述上部层压件但不粘结到所述拉片料下方的所述显窃启下部层压件子结构。
10.根据任一前述权利要求所述的显窃启拉片式密封构件，进一步包括在所述显窃启下部层压件子结构中的有色聚合物层，所述有色聚合物层具有与所述显窃启下部层压件子结构中的至少一些其他层形成对比的颜色。
11.一种密封容器，所述密封容器包括：
容器，所述容器由壁限定并且具有向内阶梯状的口部，所述口部具有围绕容器开口的上部平台区域，所述向内阶梯状的口部的所述上部平台区域比所述容器壁薄；以及
显窃启拉片式密封构件，所述显窃启拉片式密封构件密封到所述上部平台区域边缘，所述显窃启拉片式密封构件包括多层层压件，所述多层层压件包括部分粘结到显窃启下部层压件子结构的上部层压件部分，以经由所述上部层压件部分和所述显窃启下部层压件子结构之间的未粘结部分形成握持拉片，所述握持拉片完全限定在所述密封构件的周边内，所述握持拉片用于从容器开口移除所述密封构件，
所述握持拉片下方的所述显窃启下部层压件子结构包括至少用于粘结到所述容器边缘的热密封层、被定位成用于加热所述热密封层的主金属层、所述主金属层下面的粘结层和上部聚合物支撑层，以及
其中在从容器移除所述密封构件时，所述上部聚合物支撑层与所述主金属层的至少一部分分离，以隔离在所述容器平台区域上的包含来自所述主金属层、所述热密封层和所述粘结层的材料的残余材料环。
12.根据权利要求11所述的容器，其中所述隔离的残余材料环与所述拉片的所述尺寸或位置无关。
13.根据权利要求11或12所述的容器，其中所述上部聚合物支撑层是聚烯烃膜或聚烯烃泡沫层或包括膜和泡沫组分的多层层压件。
14.根据权利要求11至13中任一项所述的容器，其中所述热密封层是聚酯、聚烯烃、乙烯-乙酸乙烯酯、乙烯-丙烯酸共聚物、离聚物、中密度聚乙烯，以及它们的组合。
15.根据权利要求11至14中任一项所述的容器，其中所述下部热密封层的厚度为约0.2密耳至约3密耳。
16.根据权利要求11至15中任一项所述的容器，其中所述主金属层比所述热密封层薄。
17.根据权利要求11至16中任一项所述的容器，其中所述主金属层的厚度为约0.3密耳至约2密耳。
18.根据权利要求11至17中任一项所述的容器，其中所述聚合物支撑层与所述主金属层的粘结至少在所述容器边缘平台区域上方的部分中小于所述聚合物支撑层与所述层压件部分的粘结。
19.根据权利要求11至18中任一项所述的容器，进一步包括在所述显窃启下部层压件子结构中的有色聚合物层，所述有色聚合物层具有与所述显窃启下部层压件子子结构中的至少一些其他层形成对比的颜色。
20.一种用于形成显窃启拉片密封构件的层压件，所述密封构件用于密封到围绕容器开口的边缘，所述层压件包括：
显窃启下部层压件子结构，
所述显窃启下部层压件子结构至少包括最下部热密封层、位于所述热密封层上方的主金属层、所述主金属层和所述最下部热密封层之间的粘结层，以及上部聚合物支撑层；以及
上部层压件部分，所述上部层压件部分部分地粘结到所述显窃启下部层压件子子结构以使用所述上部层压件部分的未粘结部分形成握持拉片，当所述层压件形成密封构件时，所述握持拉片完全限定在所述密封构件的周边内，
除所述上部聚合物支撑层之外，所述显窃启下部层压件子结构中的所述层之间的所述粘结强度大于所述显窃启下部层压件子结构中的所述层的撕裂强度，使得在从容器移除所述密封构件时，所述上部聚合物支撑层与所述主金属层的至少一部分分离，以隔离在所述容器平台区域上的包括所述最下部热密封层、所述粘结层和所述主金属层的残余材料环。
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