CN102596567B - 用于热密封包装的可再密封层压材料 - Google Patents

用于热密封包装的可再密封层压材料 Download PDF

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Publication number
CN102596567B
CN102596567B CN201080051048.5A CN201080051048A CN102596567B CN 102596567 B CN102596567 B CN 102596567B CN 201080051048 A CN201080051048 A CN 201080051048A CN 102596567 B CN102596567 B CN 102596567B
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package lamina
cover plate
die
cut
sensitive adhesive
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CN201080051048.5A
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CN102596567A (zh
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X·段
M·达夫纳
B·哈拉克
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Avery Dennison Corp
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Avery Dennison Corp
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Wrappers (AREA)
  • Bag Frames (AREA)

Abstract

描述了可再密封的包装组件。该包装组件包括可选择性定位的盖片,该盖片覆盖口或者使得能够通过口进入包装。盖片和包装包括用于使盖片与包装可剥离地接合的构造,以密封包装内部。用于抓住突出物并指示拆启是否已经发生过的构造也被描述。

Description

用于热密封包装的可再密封层压材料
相关申请的交叉参考
本申请要求2009年9月11日提交的美国临时专利申请号61/241,416的优先权,其通过引用以其整体被并入本文。
发明领域
本发明涉及可热密封(heatrealable)的、具有柔韧壁的可弃的(一次性,disposable)包装,其也是可再密封的(resealable)。
发明背景
许多可再密封包装或容器是已知的。典型地,容器,如柔韧袋或硬壁箱(housing)形式的容器,装备有用于提供到容器内部的通道(access)的开口。盖子(lid)或覆盖物(cover)被安置在开口上并通常通过热密封与容器结合,以将容器内部及其内容物封闭和密封离开外部环境。对于袋式容器,袋的柔韧壁部分可以充当覆盖物并被折叠或另外安置在袋中的开口上。再密封特征使得盖子或覆盖物或其部分能被去掉或另外安置,以便允许进入容器内部。在进入容器内部之后,盖子或覆盖物可以适当地安置在开口上,并与容器接合,从而再密封容器。
针对盖子或覆盖物已设计了多种策略,以覆盖容器开口并接合容器,从而密封容器内部离开外部环境。密封策略的实例是在盖子或覆盖物的接触表面和/或围绕开口外周延伸的容器的相应区域上提供压敏粘合剂层。该后面的策略被广泛使用,尤其用于这样的可弃的包装,其用来储存或保存其中期望最小化暴露于空气的易腐烂物品如食物。
尽管在某些方面是满意的,但可再密封包装的生产相对昂贵。当前已知的可再密封有柔韧壁的可弃包装在包装的不同位置应用不同的粘合剂组合物。例如,永久性粘合剂可以沿着接缝或其它末端区域使用以进行密封,并且,压敏粘合剂可用于可再密封的盖子或覆盖物的区域。这增加了制造的复杂性和成本,而且也降低了包装的生产速度。因此,期望提供可以以高速和高产量环境制备的、新的可弃的包装容器或组件,尤其是可再密封包装容器或组件。而且,期望提供与当前已知可再密封包装相比相对便宜的可再密封包装结构。
发明概述
对于可再密封的包装组件,与以前的系统和方法有关的困难和缺点被本发明克服。在本发明的一个方面,提供可再密封的包装层压材料,其包括限定外面的外层。包装层压材料也包括接近外层的压敏粘合剂层。包装层压材料进一步包括内封层,该内密层限定内面。包装层压材料也包括接近内封层的膜层。并且,包装层压材料另外包括布置在压敏粘合剂层和膜层之间的剥离层。剥离层至少部分接触压敏粘合剂层。内面限定延伸通过密封层、膜层和剥离层的内冲切,从而限定内盖片(flap)部分。外面限定延伸通过外层和压敏粘合剂层的外冲切,从而限定外盖片部分。内盖片部分和外盖片部分相互固定,从而提供与包装层压材料部分连接的可定位盖片。外冲切和内冲切限定在外冲切和内冲切之间延伸的可再密封区域。盖片中的可再密封区域包括部分压敏粘合剂层,而包装层压材料中的可再密封区域包括部分剥离层。
在另一方面,本发明提供可再密封的袋容器。容器包括两个末端部分和在其间延伸的至少一个多层侧壁,从而限定中空内部。容器包括可选择性定位的盖片,该盖片至少部分地与一部分容器的侧壁连接,并且可定位在侧壁中限定的口上。盖片限定沿着盖片的内面延伸的第一密封区,该盖片包括在第一密封区中暴露的粘合层。侧壁限定围绕口延伸的第二密封区,所述侧壁包含在第二密封区中暴露的剥离层。盖片被配置成通过使暴露的盖片粘合层与暴露的侧壁剥离层接触而与侧壁可剥离地密封。容器的多层侧壁包括具有与盖片中的粘合层相同组成的粘合层。
而在另外的方面,本发明提供包括外部层压材料部分的可再密封包装层压材料,所述外部层压材料部分包含压敏粘合剂层。外部层压材料部分限定外冲切。外冲切延伸跨过外部层压材料区域,以限定外盖片部分。外盖片部分至少部分与包装层压材料连接。包装层压材料也包含内部层压材料部分,其包含与压敏粘合剂层至少部分接触的剥离层。内部层压材料部分限定内冲切。内冲切延伸跨过内部层压材料区域,以限定内盖片部分。内盖片部分至少部分与包装层压材料连接。外盖片部分在内盖片部分上方,并固定到其上,以形成与包装层压材料至少部分连接的盖片。外冲切和所述内冲切进一步限定(i)在外冲切和内冲切之间延伸的盖片中的盖片再密封区、选择性地暴露在盖片再密封区中的部分压敏粘合剂层,和(ii)在外冲切和内冲切之间延伸的包装层压材料中的盖片接收区、选择性地暴露在盖片接收区中的部分剥离层。盖片可以选择性地定位在以下两者之间(i)密封位置,其中,盖片的盖片再密封区中的压敏粘合剂层与包装层压材料的盖片接收区中的剥离层接触,和(ii)打开位置,其中,盖片与包装层压材料至少部分间隔开,从而使盖片的盖片再密封区中的至少部分压敏粘合剂层和包装层压材料的盖片接收区中的部分剥离层暴露。
如将被认识到的,本发明能够具有其它的和不同的实施方式,并且可以在各个方面对其若干细节进行修改,所有这些均未背离本发明。因此,附图和说明将被视为示例性的而非限制性的。
附图简介
图1是图解根据本发明的优选实施方式的可再密封包装层压材料和可定位盖片的示意图。
图2是横过图1中的线2-2获得的横截面图,其更详细地图解优选的盖片密封结构。
图3是用于本文所述的层压材料的优选组件的分解示意图。
图4是根据本发明优选实施方式的可再密封袋容器和可定位盖片的示意性透视图。
图5-10图解根据本发明的各种优选突出物结构和拆启标识(tamperidentifying)构造。
图11是图解图3的组件的详细示意图,所述组件形成为根据本发明的优选层压材料和可再密封可再密封盖片。
实施方式的详细描述
本发明提供可再密封可再密封包装组件,其任选地具有高的阻隔性能,在结构和制造上相对简单,而且,容易初次打开并安全地再密封。本发明也提供层压材料组件,其具有可用于多种包装应用的可再密封可再密封盖片(档板,flap)。本文所述的包装组件和层压材料在形成热密封的、具有柔韧壁的、可再密封可再密封可弃的袋或袋状容器中特别有用。
本发明的显著特征是将剥离层并入到多层层压材料中,并且优选紧邻压敏粘合剂层。如在本文中更详细地阐明的,剥离层在层压材料,尤其在相应的盖片构件中的应用显著地降低了初次打开密封容器另外需要的力的量。该特征促进使用利用优选层压材料和盖片结构的包装系统的容易性。如本文所述剥离层结合特定图例(剪切线,cutline)的并入也在初次打开密封包装或容器期间在层压材料部分之间提供指定的裂开或分离界面。这种分离界面的提供显著地减少层压材料撕裂或无意识切割的发生,从而保护包装的密封完整性。优选实施方式的层压材料、盖片结构和包装组件的这些和其它优势在本文中更详细地描述。
本文所述的包装层压材料通常包括多个层,如2到12层或更多,优选5到7层。通常,层压材料包括外层、任选的阻挡层、压敏粘合剂层、剥离层、膜层和密封层。也可以包括任选的覆盖物印刷层。所述层可以有各种不同的排列,然而,通常外层为包装层压材料提供外面而密封层提供用于接触和密封的内面。压敏层和剥离层优选相互紧邻,以提供如本文所述的再密封作用。任选的阻挡层通常邻近外层被布置,但本发明包括其中阻挡层位于其它位置的层压材料。类似地,膜层可以位于层压材料中的几乎任何位置,然而,其通常接近密封层定位。
根据本发明,提供了可选择性定位并可再密封可再密封盖片部件的独特结构及形成方法。如本文所使用的,在层压材料被用以形成容器或包装时,术语“盖片”指从层压材料的剩余部分被部分切断的一部分层压材料,如一部分侧壁,以便该部分相对于剩余部分是可选择性定位的。如在本文中更详细地描述的,盖片部分仍与剩余部分连接。
可以以快速且经济的方式容易地形成各种优选盖片。根据本发明,在层压材料的某些层中形成的切口(cut)、入口(incision)或类似物的独特组合使得能够廉价地制造包装的可再密封可再密封开口。
根据本发明的其它特征,针对盖片,提供了有助于打开并抓住盖片的各种突出物。本文所述的另外特征用于减小盖片和相应接收表面之间的粘合剂接合的范围。
本发明也提供各种拆启标识符。拆启标识符提供包装、盖片或层压材料已被初次打开的指示。在本文中更详细地描述所有这些和其它方面。
外层
优选的多层层压材料包括外部基底,以为盖片和包装侧壁,尤其为初次打开容器而产生的盖片的最外面部分提供支持,从而使盖片与侧壁至少部分分开。外部基底可由多种材料形成,如聚烯烃膜材料或纸、纸板或其它纸基材料。外部基底的代表性材料包括但不限于,定向的和非定向的以及与其共聚物共挤出(共挤压,co-extruded)的或不与其共聚物共挤出的聚乙烯(PE)、聚丙烯(PP)。取决于具体的最终应用,可能适于覆盖物外部基底的膜的另外的实例是聚氯乙烯(PVC)和其共聚物的层。另外的材料包括但不限于,聚对苯二甲酸乙二酯(polyethyleneterephthalate,PET)、定向聚丙烯(OPP)、聚氯乙烯(PVC)和邻苯二醛(ortho-phthalaldehyde,OPA)。对于许多应用,优选PET。
可以以各种厚度将外部基底或层应用于层压材料中。外部基底可以具有约12至约60微米的典型厚度,优选约12至约25微米的厚度。
因为外部基底的外面将有可能构成盖片或侧壁的最外表面,因此期望针对外部基底选择的材料至少沿该朝外的面显示引人注目的印刷适性特性。
印刷适性通常由图像的清晰度和亮度以及墨投锚力(inkanchorage)来限定。清晰度与印刷表面的表面张力密切相关。墨投锚力常常由胶带试验(Finat试验:FTM21)测试。通常,PVC可用各种意图与PVC一起使用的墨印刷。在大部分情况下,墨是水基的(尤其在美国)或被设计用于UV干燥(尤其在欧洲)。通常,所有聚烯烃膜在印刷机上(on-press)电晕处理之后可以用UV墨进行印刷,PE主要在墨粘附上较PP好。对于水基墨,优选额外的底漆和面漆,以达到良好的墨投锚力。
如本文中所阐释的,层压材料的盖片或侧壁可以包括布置在外部基底外面上的任选的印刷层。
阻挡层
优选的多层层压材料包括任选的阻隔材料层,以提高盖片和侧壁的密封特性并促进产生密封的盖片和侧壁组件。典型地,期望阻隔材料显示对氧和/或水汽通过该材料运输或扩散的抗性。这对于涉及某些食品的密封应用尤其是期望的。多种阻隔材料可用于阻隔材料层。阻隔材料(一种或多种)的选择主要由所需的密封程度来决定,并且因此,由密封组件要容纳的内容物来决定。用于阻隔材料层的代表性材料包括但不限于,聚乙烯醇(PVOH,PVA)和乙烯乙烯醇(EVOH)聚合物。熟知并且优选的阻隔材料是聚偏1,1-二氯乙烯(PVDC)。同样考虑可以使用本领域中已知的尼龙和各种尼龙基聚合物。可以使用例如利用铝的各种金属化层。还考虑可以使用这些材料的组合,尤其地,可以利用这些材料的多层膜。由本申请的受让人所拥有的美国专利公布2004/0033379中提供了对于阻隔材料及其特性的杰出论述。阻隔材料的优选材料包括PVDC、EVOH及其组合。阻隔材料的另外优选材料是金属化铝层。
阻隔材料通常以相对小的厚度应用于优选覆盖物层压材料中。例如,阻隔材料层的厚度优选约0.4至约6微米,更优选约1至约5微米,并且更优选约1至约3微米的厚度。
如所指出的,优选地,阻隔材料显示相对低的透氧量和/或透水量。最优选地,透氧量为零。优选最大透氧量约为50cc/m2/24小时。优选最大透水量约为50cc/m2/24小时。
对于某些应用,考虑本发明的层压材料可以不含阻挡层。然而,优选实施方式包括阻挡层。因此,阻挡层被描述为任选的。
在某些应用中,沿着膜层或外层的最外面利用阻隔材料,如PVDC或金属化铝可以是优选的。在没有这样的阻挡层的情况下,透氧率或透水率就层压材料中的一个或多个层的外面而言将相对高。如在本文中更详细地阐明的,在层压材料中形成至粘合层的切口或入口后,阻隔性能通常沿着切割区域下降。因此,阻隔材料并入层压材料可以提高切割层压材料的阻隔性能。
而且,如果本发明的层压材料和包装组件将用于需要控制环境的易腐烂产品中,优选在层压材料内的多个位置使用隔氧层。对于不易腐烂的产品,可能不需要这样的阻挡层。
压敏粘合剂层
优选的多层层压材料包括压敏粘合剂(PSA)层。压敏粘合剂提供粘性表面,其允许与另一接触表面结合。优选地,压敏粘合剂的性能使得结合也提供密封,以防止或至少有效地防止气体或其它剂跨过压敏粘合剂区域流动。
多种压敏粘合剂可用于该层,只要其性能和特性符合所得组件的包装要求。压敏粘合剂可以是热溶性压敏粘合剂,如例如橡胶基或丙烯酸基压敏粘合剂。压敏粘合剂可以是UV固化的热熔性粘合剂(热熔体,hotmelt)。压敏粘合剂可以基于橡胶基热溶性组合物、溶剂型橡胶类粘合剂、溶剂型丙烯酸粘合剂或溶剂型聚氨酯粘合剂。压敏粘合剂可以是乳液基的,如乳液型丙烯酸粘合剂。如所指出的,可以使用多种压敏粘合剂。由本申请的受让人所拥有的美国专利5,623,011;5,830,571;和6,147,165中公开了各种压敏粘合剂的广泛选择。
用于压敏粘合剂层的优选压敏粘合剂可以以名称S692N商购获得。S692N粘合剂是乳液基丙烯酸粘合剂。通常,该粘合剂是丙烯酸丁酯和丙烯酸2-乙基己酯单体与各种增黏剂和加工酸(processingacid)的聚合混合物(polymericblend)。其它优选压敏粘合剂包括但不限于,乳液型丙烯酸粘合剂和橡胶基热溶性粘合剂。
压敏粘合剂层的厚度通常在约12至约40微米的范围,优选约12至约20微米。然而,应该理解,本发明包括使用大于或小于这些厚度的层压材料,用于压敏粘合剂层。
剥离层
优选多层层压材料包括剥离层。优选地,剥离层紧邻层压材料中的压敏粘合剂层布置。最优选地,剥离层布置在压敏粘合剂层和内封层之间,并且优选在压敏粘合剂层和膜层之间。剥离层提供剥离表面,如之前所述的,该剥离表面紧邻压敏粘合剂层并与其接触。
各种剥离材料,如通常用于压敏胶带和标签的那些材料是已知的,其包括硅氧烷(silicones)、醇酸树脂(alkyds)、烯类聚合物(vinylpolymers)的硬脂酰衍生物(如聚乙烯硬脂酰氨基甲酸酯)、硬脂酸氯化铬、硬脂酰胺等等。碳氟聚合物涂覆的剥离衬垫也是已知的,但相对昂贵。在膜共挤出过程中,膜表层可以通过加入一种或多种增滑剂而被改性,所述增滑剂包括硅氧烷型增滑剂。剥离层可以由增滑剂改性的膜表层提供。更具体而言,剥离层的形式可以是有机硅增滑剂(siliconeslipagent)改性的共挤出的聚丙烯膜表层。对于大部分压敏粘合剂应用而言,硅氧烷是目前为止最频繁使用的材料。硅氧烷剥离涂层在高和低的剥离速度下均容易剥离,这使得它们适于多种生产方法和应用。
已知的硅氧烷剥离涂层系统由反应性硅氧烷聚合物(siliconepolymer),例如有机多分子硅醚(通常称为“聚硅氧烷(polysiloxane)”或简单地称为“硅氧烷(siloxane)”);交联剂;和催化剂组成。在应用于邻近的层或其它基底之后,涂层通常必需被固化以交联硅氧烷聚合物链,所述固化可以通过热或辐射进行(通过,例如紫外线或电子束照射)。
基于它们被应用的方式,已知有三种基本类型的硅氧烷剥离涂层用于压敏粘合剂工业:溶剂型、水性乳液型和不含溶剂型涂层。每种类型均有优势和劣势。溶剂型硅氧烷剥离涂层已经被广泛地使用,但由于它们使用烃类溶剂,因此,由于日益严格的空气污染条例、高能量要求和高成本,最近几年,它们的应用逐渐减少。事实上,溶剂回收或焚化的能量需求通常超过涂层操作本身的能量需求。
水性乳化硅油剥离系统与溶剂系统一样被熟知,并且已被用于各种压敏产品上,包括胶带、地砖和乙烯基壁覆盖材料(wallcovering)。然而,与将其施用于纸基底有关的问题已经限制了它们的用途。水使纸纤维膨胀,破坏剥离衬垫衬里(backing)的空间稳定性并引起薄片卷曲和随后的处理困难。
无溶剂硅氧烷剥离涂层近几年已有所增长,现在其代表硅氧烷剥离涂层市场的主要部分。向其它硅氧烷涂层一样,它们在施用于柔韧的衬垫基底之后必需被固化。固化产生抵抗压敏粘合剂渗透的交联膜。
美国专利5,728,469;6,486,267;和由本申请的受让人所拥有的美国公布的专利申请2005/0074549中提供了对各种剥离材料、其特性和并入到层压材料组件中的有教益的描述。还考虑本领域中已知的各种蜡可以用于剥离材料或用于剥离层。
优选层压材料利用相对薄的剥离层。例如,典型剥离层的厚度为约1至约4微米。优选地,剥离层的厚度为约1至约2微米。
膜层
优选的多层层压材料包括膜层或内部基底。内部基底为盖片和侧壁层压材料,尤其为邻近内部基底布置的层提供支持。用于内部基底的代表性材料包括本文所述的用于外部基底的那些材料。另外,优选利用共挤出的双轴定向的聚丙烯(BOPP)材料。这些材料由于相对便宜而提供成本节约,并且,它们具有足够硬挺度以很好地分配并支持外层再封。用于内部基底层的另外的优选材料是共挤出的双轴定向的聚对苯二甲酸乙二酯(BOPET)。考虑可以使用定向或非定向形式的膜。之前所述的PVC和OPA聚合材料也可适于用于该层。
内部基底厚度通常在约12至约60微米的范围,优选约12至约25微米。本发明包括应用大于或小于这些厚度的厚度。
密封层
优选的多层层压材料包括热密封层。优选地,热密封层沿着层压材料的下面或内面布置,所述层压材料在层压材料的一部分与该层压材料的另一部分热结合之后与容器的相应面接触。
热密封层是这样的层:其通过热被活化,以允许该层与塑料基底结合。用于热密封层的材料包括但不限于,单独或组合使用的以下成膜材料,如聚乙烯(polyethyelene)、金属茂催化的聚烯烃,如例如聚丙烯(Co-PP)共聚物或聚丙烯(Ter-PP)三元共聚物、间规聚苯乙烯、间规聚丙烯、环状聚烯烃、聚乙烯甲基丙烯酸、聚乙烯丙烯酸乙酯、聚乙烯丙烯酸甲酯、丙烯腈丁二烯苯乙烯聚合物、聚乙烯乙烯醇、聚乙烯乙烯基乙酸酯、尼龙、聚丁烯、聚苯乙烯、聚氨基甲酸酯、聚砜、聚偏1,1-二氯乙烯、聚丙烯、聚碳酸酯、聚甲基戊烯、苯乙烯马来酸酐聚合物、苯乙烯丙烯腈聚合物、基于乙烯/甲基丙烯酸的钠盐或锌盐的离子交联聚合物、聚甲基甲基丙烯酸酯、纤维素、氟塑料、聚丙烯腈和热塑性聚酯。其它考虑的用于热密封层的材料包括但不限于,乙二醇改性的聚对苯二甲酸乙二酯(PETG),其特别适于在一种或多种其它基底由聚对苯二甲酸乙二酯(PET)形成时应用。优选地,在热密层中使用PE,更优选地,PE和EVA的掺和物,如例如,PE和EVA与特别的防粘连添加剂和抗静电添加剂的掺和物。用于热密封层的优选材料是乙二醇改性的聚对苯二甲酸乙二酯(PETG)。用于热密封层的另外的优选材料包括Co-PP或Ter-PP。用于热密封层的最优选材料是线性低密度聚乙烯(LLDPE)。
热密封层的厚度可以根据包装组件的要求而变化。该层的典型厚度为约15至约90微米,优选约30至约60微米。当利用复合薄膜膜表层时,表层的厚度通常为约1.5微米。
热密封层被设计为在本领域技术人员已知的温度下进行活化。虽然热密封层可以在低于活化指定的那些温度下进行活化,但热密封层被设计为根据基底材料在某些温度下活化。优选地,热密封层在约90℃至约160℃之间的温度下活化,更优选在约100℃至约150℃的温度之间,更优选热密封层在约110℃至约140℃之间的温度下活化,并且最优选热密封层在约120℃至约130℃之间的温度下活化。接触时间相对快,如约0.1秒至约5秒,通常约2秒。优选地,在热密封期间也对各个表面施加压力。
覆盖物印刷层
任选的印刷层可以布置在前述外部基底上。印刷层用以接收并保持沉积在印刷层上的一种或多种墨。墨(一种或多种)构成覆盖物层压材料和包装组件的标识或其它标记。印刷层可由本领域技术人员通常已知的多种材料形成。例如,各种聚乙烯醇(PVA)和纤维素基材料可用于印刷层。
印刷层的厚度范围通常为约3至约20微米,优选地,厚度约3至约8微米。
盖片和层压材料主体或侧壁的优选方面
优选实施方式层压材料和所得容器与包装的另一明显特征是在某些层中提供一个或多个切口、刻痕(score)或狭缝。切口、刻痕或狭缝可以以各种方法形成在层压材料中,然而,优选方法是通过特定的层,如密封层、内部基底和剥离层冲切狭缝。在其它层中,优选通过外层和粘合层形成切口、刻痕或狭缝。优选地,这些切口通过冲切形成。这些方面更详细地描述在本文中。这种切口的组合形成独特的盖片和密封结构。
同样考虑,通过在覆盖物层压材料的选择区域不形成切口、刻痕或狭缝,可以为盖片提供铰接或桥接部分。因此,例如,一个或多个切口可以沿着矩形式样的四边中的三边提供在层压材料中。然后,没有切口的层压材料部分在初次和随后打开包装后可以用作所得盖片的铰接。
优选在覆盖物层压材料的所述层(一个或多个)中提供切口、刻痕或狭缝的另一个理由是这样的切口使得能够控制压敏粘合剂层和剥离层之间的接触表面积。容易控制接触面积的量、结构和形状的能力使得能够直接控制层压材料的外部可分离部分和层压材料的内部可分离部分之间的再密封强度。如将被理解地,对于其中期望更大再密封强度的应用,在设计和/或制造过程中可以容易地增大接触面积。而对于其中期望更小再密封强度的应用,在设计和/或制造过程中可以容易地减小接触面积。
优选实施方式覆盖物层压材料的另一优选方面是通过适当选择与压敏粘合剂接触的材料,即,紧邻覆盖物层压材料中的压敏粘合剂布置的材料层,可以使每个材料层的暴露面的表面能适于提供期望的密封特性,如特定的再密封强度。例如,如果期望低的再密封强度,具有相对低表面能的剥离材料,如硅氧烷剥离材料可以紧邻压敏粘合剂层使用。此外,用于紧邻压敏粘合剂的层的适当工程材料的选择和排列可用于获得不同的粘着性,以保证或至少促进——与另一个层相比——粘合剂与一个层的保持力。例如,通过适当选择和使用用于剥离层和布置在压敏粘合剂层相对面上的层的材料,可以实现粘合剂与外部可分离覆盖物部分的保持,与保留在与容器结合的内部覆盖物部分上相反。
具体地,根据本发明,压敏粘合剂与紧邻粘合剂的一个或多个层例如剥离层之间的粘附水平被控制。粘附水平优选通过以下被控制:(i)使用紧邻压敏粘合剂层布置的剥离层,最优选在粘合层和覆盖物层压材料的内部基底之间布置的剥离层;(ii)初次打开覆盖物后暴露的剥离层的结构和表面积;(iii)适当选择剥离材料和/或用于剥离层的、具有期望表面能的材料;(iv)适当选择覆盖物层压材料中的其它材料,即,压敏粘合剂材料和紧邻与剥离层的面相对的压敏粘合剂的面布置的层的材料;(v)初次打开覆盖物后暴露的压敏粘合剂材料的结构和表面积;和(vi)压敏粘合剂层的厚度。
通过控制粘附水平,优选由因素(i)–(vi)中的一个或多个或者所有进行控制,压敏粘合剂层可以更可靠地与覆盖物的外部可分离部分保持。
就压敏粘合剂和布置在压敏粘合剂层的相对侧面或面上的层而言,优选存在特定的粘着性和剥离特性。期望在压敏粘合剂层的相对面上的两个层之间在这些特性上存在差异。具体地,期望在与(i)压敏粘合剂和紧邻粘合剂的一个面的层,以及(ii)压敏粘合剂和紧邻粘合剂的相对面的层相关的粘着性和剥离特性之间存在特定的最小差异。
对于利用布置在共挤出的双轴定向聚丙烯(BOPP)内部基底和聚对苯二甲酸乙二酯(PET)外部基底之间的压敏粘合剂层的覆盖物层压材料,优选这两个基底和压敏粘合剂的各个面之间的粘着性和剥离特性的差异为至少1.5N/in,优选为至少3.0N/in。与内部基底和压敏粘合剂的相对面之间存在的粘合剂结合相比,更强的粘合剂结合优选存在于外部基底和压敏粘合剂的相应面之间。
压敏粘合剂和剥离层材料的适当选择主要控制初次打开密封容器所需的力以及初次打开后随后的打开操作所需要的力的量。该力——称为“打开力”——是用户必需施加于覆盖物上以将覆盖物层压材料分成其各个部分从而打开容器的力。典型地,为了使容器相对容易打开,打开力应该小于10N/in。同样期望,一些最小力是必要的,以便防止容器的无意识打开。因此,典型地,至少1N/in至约2N/in并优选大于3N/in的最小力被定为目标。对于许多应用,优选提供约1N/in至约2N/in的再密封力。
再另外的优选方面是提供一个或多个有助于抓住和/或打开盖片的突出物。突出物优选在外冲切形成期间形成,并延伸通过层压材料的若干外层,如外层和压敏粘合剂层。突出物可以有各种不同的形状,这取决于层压材料和/或包装组件的最终使用要求。
在突出物(tab)与盖片联合使用的情况下,优选在盖片和/或突出物的下面和朝向盖片和/或突出物的相应剥离层之间使用去粘(adhesivedeadening)材料。多种材料可用作去粘材料,如非挥发性的烃和非粘性聚合物。这种材料的一个实例是无毒漆或油性材料。
可再密封可再密封盖片和层压材料的进一步优选方面是提供一个或多个拆启标识符。这种构造提供盖片以前是否被打开过的视觉指示。拆启标识符的优选形式是在冲切中,尤其在本文中所阐释的外冲切中提供一个、两个或多个小的、非连续的、未切割的节段(segment)。在初次打开盖片得以进入包装后,一个或多个非连续的、未切割的节段被切断或撕裂,从而指示初次打开操作的发生。拆启标识符的另一优选形式是在盖片的再密封区内提供一个或多个切口形状。在初次打开盖片时,切口形状与包装主体保持在一起,并在盖片中产生相应数目的口。这些口以及随后的切口形状和口之间的未对准(mis-alignment)提供初次盖片打开已经发生的另外的指示。
通过利用本文所述的优选实施方式覆盖物层压材料的、可能具有其它特征的这些关键的方面,可以实现覆盖物层压材料的非常特定的粘合、再密封和打开特性。可以使用本文所述的层压材料和可再密封可再密封盖片,以形成不同的可再密封包装和容器的种类。
优选实施方式组件
图1图解根据本发明优选实施方式的可再密封包装层压材料10。可再密封包装层压材料10包含限定通常中空的内部(未显示)的层压材料主体20和提供到达其中的通道的口60。可再密封包装层压材料10也包括可定位盖片30,其限定近端区域34和远端区域36。近端区域通常在第一近端位置34a和第二近端位置34b之间延伸。可定位盖片30沿着至少部分其近端区域34与可再密封包装层压材料10的层压材料主体20连接或者以另外方式附着或固定于可再密封包装层压材料10的层压材料主体20。可定位盖片30是可定位的,以便可定位盖片30可以从如图1中所描述的打开位置移动到其中可定位盖片30覆盖口60的闭合位置,并且优选地密封地接合层压材料主体20。
优选地,可定位盖片30限定围绕可定位盖片30的外周延伸的第一可再密封区域32。即,优选第一可再密封区域32沿着可定位盖片30的下面从可定位盖片30的第一近端位置34a延伸到远端区域36,并到达第二近端位置34b。如在本文中更详细地阐明的,优选第一可再密封区域32包括暴露的压敏粘合剂。除了可定位盖片30的第一可再密封区域32以外的可定位盖片30的其余区域在本文中被称为盖片剩余区域38,并在本文中被更详细地描述。
层压材料主体20限定围绕口60延伸的第二可再密封区域62。如在本文中更详细地阐明的,优选地第二可再密封区域62包含暴露的剥离材料。第二可再密封区域62优选地成形并且被制成合适的大小,以便与可定位盖片30的第一可再密封区域32相符。同样优选层压材料主体20的第二可再密封区域62朝向可定位盖片30的第一可再密封区域32。因此,在闭合可定位盖片30并从而覆盖口60时,可定位盖片30的第一可再密封区域32与层压材料主体20的第二可再密封区域62接触。优选地,第一可再密封区域32和第二可再密封区域62之间接触的程度使得至少80%,更优选至少90%,更优选至少95%以及最优选至少98%的第一可再密封区域32和第二可再密封区域62两者的总表面积相互接触。该结构促进可定位盖片30和层压材料主体20之间的密封和固定接合。
各种构造和结构可用于可定位盖片30。优选地,可定位盖片30包括外盖片部分50和内盖片部分40,它们优选彼此固定或以另外方式相互附着,以形成单一的盖片或类似构件。如图1中所描述的,优选外盖片部分50较大,即,具有比内盖片部分40大的表面积。而且,优选内盖片部分40沿着外盖片部分50的下面在中心定位。围绕内盖片部分40延伸的外盖片部分50的剩余暴露的下面可以构成之前所述的可定位盖片30的第一可再密封区域32。该得到的结构提供这样的可定位盖片,所述可定位盖片在其外缘周围的厚度减小,而沿着内部区域的厚度增加。
对于包括外盖片部分50和内盖片部分40的可定位盖片,尤其是提供如所指出的具有不同厚度的区域的那些可定位盖片,优选在围绕口60延伸的层压材料主体20中形成厚度减小的区域。该厚度减小的区域可以构成层压材料主体20的第二可再密封区域62。优选地,第二可再密封区域62中层压材料的厚度与第一可再密封区域32中外盖片部分50的厚度之和等于剩余区域38中可定位盖片30的厚度。
图2是图1所示的可再密封包装层压材料10的部分横截面图。具体地,跨过图1的线2-2获取横截面,因而显示了外盖片部分50和内盖片部分40的横截面以及口60和围绕口60延伸的层压材料主体20的第二可再密封区域62的相应结构。图2也图解了在位置A的可定位盖片30和闭合可定位盖片30至位置B,从而覆盖口60。在将可定位盖片30安置到其闭合位置——被指定为图2中的位置B——之后,可以看出可定位盖片第一可再密封区域32与层压材料主体第二可再密封区域62接触。应该理解,图2中描述的可定位盖片30可以被打开的范围比图2中所示的范围大得多。此外,应该理解,可定位盖片30可以在打开之后由于层压材料的柔韧特性而显示弓形或曲线形。
图3是根据本发明的优选层压材料组件110的分解示意图。优选层压材料组件110包括多个层,所述多个层可以以多种不同的顺序和组合排列。然而,示例性优选排列显示在图3中。层压材料组件110包括限定外面122的外层120、粘合层130、剥离层140、膜层150和内封层160。内封层160限定内面162。优选地,粘合层130紧邻剥离层140布置。一个或多个阻挡层(未显示)可被并入到层压材料组件110中,与所示的任何层(一个或多个)并排或在其之间。
多个层外层120、粘合层130、剥离层140、膜层150和内封层160以及一个或多个另外的层优选形成到用于之前所述的可再密封包装层压材料10的柔韧层压材料中,尤其是结合图1和图2所述的可定位盖片30和层压材料主体20中。
根据本发明,在层中形成一个或多个切口、狭缝或其它入口,以产生可定位盖片部件。优选地,以这样的方式形成各个切口,所述方式产生具有第一可再密封或再密封区域的可定位盖片和具有相应的第二可再密封或再密封区域——用于使可定位盖片与其密封地结合——的层压材料主体。这样的切口的优选结构描述在图3中。优选地,切口、狭缝或入口——通常被称为“冲切”并在图3中被描述为170——形成在一个或多个外层,如外层120和粘合层130中。优选地,外层120和粘合层130的每一层中的冲切170尺寸相同、形状相同并且方向相同。冲切170在本文中通常称为外冲切。优选地,另外的切口、狭缝或入口在本文中也称为“冲切”并在图3中被描述为180,其形成在一个或多个内部层,如所示的剥离层140、膜层150和内封层160中。优选地,剥离层140、膜层150和内封层160的每一个层的冲切180形状相同、尺寸相同并且方向相同。冲切180在本文中通常称为内冲切。在组装层之后,外层120和粘合层130中的外冲切170形成外盖片部分,如图1和2中描述的外盖片部分50。并且,剥离层140、膜层150和内封层160中的内冲切180形成内盖片部分,如图1和2中描述的内盖片部分40。
应该理解,除了图3中描述的U-型结构之外,外冲切170和内冲切180各自还可以有各种不同的形式。例如,可以使用弓形形状的冲切。可选地,可将多边非矩形结构用于各种冲切。应该理解,为外冲切170选择的形状将决定所得盖片的形状。并且,为内冲切180选择的形状将决定层压材料中产生的口的形状。
图4图解根据本发明优选实施方式的容器210。可再密封袋容器210包括第一末端220、第二末端230和在第一末端220和第二末端230之间延伸的一个或多个侧壁240。第一末端220和第二末端230优选为被热密封,从而形成闭合和密封的包装或容器。侧壁240中限定的是口260。第二再密封区域262围绕口260外周延伸。可再密封袋容器210也包括可定位盖片250,可定位盖片250包括第一再密封区域252。如图4中所描述的,可定位盖片第一再密封区域252围绕可定位盖片250外周延伸。如本文之前所述的,优选第二再密封区域262和第一再密封区域252在尺寸、形状和结构上相似,以便在闭合可定位盖片250后相互密封地接触。
进一步参考图4,粘合剂区域,优选压敏粘合剂区域暴露在可定位盖片250的第一再密封区域252中是优选的。同样优选剥离材料区域暴露在侧壁240的第二再密封区域262中。该结构促进在闭合可定位盖片250和侧壁240之间在闭合可定位盖片250并且覆盖口260之后的密封接合。
图5-10图解本发明的另外特征,包括例如用于抓住可定位盖片的各种突出物和用于识别从其邻近侧壁或层压材料主体拆启或之前打开可定位盖片已经发生过的构造。图5-10各自图解外冲切370a、370b、370c、370d、370e和370f;和内冲切以虚线显示为380a、380b、380c、380d、380e和380f。如将被理解的,这些冲切形成如图5-10中分别示出的可定位盖片330a、330b、330c、330d、330e和330f。可以提供一个或多个突出物374、376和378,以有助于抓住可定位盖片。一个或多个突出物由于形成外冲切而形成。突出物优选位于可定位盖片的远末端或其附近。突出物可以有各种各样的形状,例如但不限于,如图5、7和8分别示出的弓形形状、三角形形状或矩形形状。还考虑可以提供并不延伸超出外冲切的突出物,如图6所示。
优选地,根据本发明的另一个方面,突出物的抓住可通过选择性沉积有效量的去粘材料来进一步促进。参考图5-10,应该理解,在外冲切和内冲切之间延伸的是再密封区域。并且,这些再密封区域对应于压敏粘合剂的暴露区域和剥离材料的暴露区域之间的接触面积。因此,通过将去粘材料区域选择性放置在再密封区域内,使其接近(紧邻,proximate)可定位盖片的突出物以及在粘合剂和剥离材料之间,突出物可以更容易地被抓住并较少附着于下面的表面上。图5图解去粘材料区域360a,该去粘材料沉积于在外冲切370a和内冲切380a之间延伸的第二再密封区域内的暴露的剥离材料上。去粘材料区域360a接近可定位盖片330a的弓形突出物374。并且,图6图解去粘材料区域360b,该去粘材料沉积于在外冲切370b和内冲切380b之间延伸的第二再密封区域内暴露的剥离材料上。去粘材料区域360b接近突出物,产生可定位盖片330b的外冲切370b的角落区域。类似地,图7图解去粘材料区域360c,该去粘材料沉积于在外冲切370c和内冲切380c之间延伸的第二再密封区域内暴露的剥离材料上。去粘材料区域360c接近可定位盖片330c的三角形突出物376。同样地,图8图解去粘材料区域360d,该去粘材料沉积于在外冲切370d和内冲切380d之间延伸的第二再密封区域内暴露的剥离材料上。去粘材料区域360d接近可定位盖片330d的矩形突出物378。
本发明也提供拆启标识构造,其指示可定位盖片是否已经被初次打开过。这些构造的形式为一个或多个非连续冲切节段。这些小的、非连续冲切节段在邻近冲切之间延伸,并且在有关层中最初的形式是未切割或另外的完整材料。在从其相应的体或侧壁初次打开可定位盖片后,小的、非连续冲切节段通常沿着在相邻冲切之间延伸的线撕裂、破裂或以其它方式分开。因此,撕裂或切断的、非连续冲切节段指示可定位盖片之前已经被初次打开过。
图5、7和8描述非连续冲切节段形式的代表性拆启标识符。参考图5,非连续冲切节段372a将形成突出物374的弓形冲切与外冲切370a的剩余部分分开。如将被理解的,在初次打开可定位盖片330a之后,由弓形节段产生的突出物374被抓住并拉动。该操作导致非连续冲切节段372a的破裂。图7描述非连续冲切节段372c,其分开形成突出物376的三角形冲切节段与外冲切370c。并且,图8图解非连续冲切节段372d,其分开形成突出物378的矩形冲切节段与外冲切370d。
本发明也提供拆启标识构造,其形式为位于在外冲切和内冲切之间延伸的再密封区域内的一个或多个冲切“岛”。岛通过可定位盖片的厚度,优选在可定位盖片再密封区域中厚度减小的区域被冲切。这些拆启冲切优选延伸通过外层和粘合层。拆启冲切也可以延伸通过剥离层。可以在再密封区域内提供任何数量、形状和面积的拆启标识岛。图6图解卵形形式的三个拆启标识符350a,其通常以与外冲切370b的一个或多个边成锐角而定向。图7图解位于再密封区域内的、矩形形式的两个拆启标识符350b。图9描述三个卵形拆启标识符350c。并且,图10图解位于再密封区域中的三个圆形拆启标识符350d。应该理解,岛型拆启标识符通过提供相应可定位盖片之前已经被打开过的视觉指示而起作用。当可定位盖片被打开时,冲切岛保留在体或侧壁的可定位盖片接收区。在闭合可定位盖片之后,使可定位盖片中产生的口与凸出的岛对齐几乎是不可能的,并且,将岛插入到可定位盖片中其相应口的每一个也几乎是不可能的。这些方面结合图11被更详细的描述。
图11示意性地图解图3中以分解方式显示的层压材料组件110——在形成为层压材料主体114和与其连接的可定位盖片190之后。参考图11,可定位盖片190包括外层120和粘合层130。部分粘合剂暴露在围绕可定位盖片190外周延伸的可定位盖片第一再密封区域192中。外层120和粘合层130通常对应于之前所述的外盖片部分。可定位盖片190进一步包括剥离层140、膜层150和密封层160。剥离层140、膜层150和密封层160优选沿着可定位盖片190的下面在中心定位。剥离层140、膜层150和密封层160通常对应于本文所述的内盖片部分。通过进一步参考图3,应该理解,外盖片部分的形状由外冲切170的形状规定;而内盖片部分的形状由内冲切180的形状规定。
可定位盖片190也可以被提供有弓形形状的突出物374。优选地,突出物位于可定位盖片190的远末端。可定位盖片190也可以限定一个或多个口352,该口352通过冲切相应的拆启标识岛350和打开可定位盖片190而产生。
层压材料主体114也包含外层120、粘合层130、剥离层140、膜层150和密封层160。口182被限定在层压材料主体114中,并且由在图3中最佳显示的内冲切180产生。第二再密封区域184围绕口182延伸,并通常在外冲切170和内冲切180之间延伸。部分剥离层140暴露在第二再密封区域184中。有效量的去粘材料360位于第二再密封区域184中,并且优选位于闭合可定位盖片190后对应于突出物374的位置。层压材料主体114也包括多个如本文之前所述的拆启标识符岛350。
本发明也提供用于打开和再密封之前被热密封的包装的方法。该方法包括将层压材料的第一部分——即,盖片——与层压材料的剩余第二部分分开。这导致压敏粘合剂层与剥离层在所述可再密封区域(一个或多个)中的分开,从而使压敏粘合剂区域和剥离层的相应区域暴露。因为层压材料分开并不在其它地方发生,所以包装易于被打开,并且可到达容器的内部。该方法也包括使压敏粘合剂的暴露区域与剥离层的暴露区域配合地接触,从而再密封包装。术语“配合地接触”指安置具有压敏粘合剂的暴露区域的盖片,以便该区域与剩余的层压材料部分中剥离层的相应暴露区域对齐。优选地,在使这些区域配合地接触另一区域之后,每个区域的整体与另一区域接触,或者非常接近这样。
通过使层压材料密封层的第一区域与层压材料的另一区域,优选与层压材料密封层的另一区域接触,层压材料的选择区域被相互地热粘附。该方法也包括将密封层加热到约120℃至约130℃的温度保持至少2秒的时间段。
通过适当的排列和对层进行期望的排序来形成优选的层压材料。通常,一个或多个外层的集合,如外层和压敏粘合剂层被施加于彼此。然后,外冲切形成在该层的集合中。如果一个或多个突出物和/或非连续的、未切割的拆启标识符待被提供,则如本文所述地适当设置外冲切式样,以提供这样的构造。另外,如果一个或多个岛型拆启标识符被使用,则这些被切割或以另外的方式形成在本文所述的外层中。一个或多个内部层的集合,如内封层、膜层和剥离层同时地或单独地被施加于彼此。然后,内冲切形成在该层的集合中。然后,将两组层一起施加,以便压敏层与剥离层接触,同时保证在相应的外冲切和内冲切之间发生正确的排列。在一定量的去粘材料待被使用的情况下,该材料被适当地沉积在外冲切和内冲切之间限定的再密封区域中。
可以通过形成之前所述的层压材料的相对长的和连续的管由本文所述的层压材料形成柔韧壁容器或包装。优选地,这通过将密封层的纵向边缘热密封到密封层的相对纵向边缘来完成。然后,所得袋的一端,即,“底部”被热密封。然后,加入袋的内容物,然后,袋的另一端,即,“顶部”被热密封。
本发明包括在单一的包装或容器中提供若干盖片。对于具有分区的内部的容器,该结构可以是优选的。
通过将来的应用和该技术的发展,许多其它益处将无疑变得显而易见。
本文所提到的所有专利、公布的申请、测试方法或标准以及文章均通过引用其整体被并入本文。
如本文上面所描述的,本发明解决了与以前的类型的装置有关许多问题。然而,应该理解,本领域技术人员可以对已经在本文被描述且图示以阐明本发明性质的细节、材料和部件排列进行各种变化而不背离如所附权利要求书所表示的本发明的原理和范围。

Claims (32)

1.可再密封包装层压材料,包含:
外层,所述外层限定外面;
接近所述外层的压敏粘合剂层;
内封层,所述内封层限定内面;
接近所述内封层的膜层;
布置在所述压敏粘合剂层和所述膜层之间的剥离层,所述剥离层至少部分地与所述压敏粘合剂层接触;
所述内面限定内冲切,所述内冲切延伸通过所述内封层、所述膜层和所述剥离层,从而限定内盖片部分;
所述外面限定外冲切,所述外冲切延伸通过所述外层和所述压敏粘合剂层,从而限定外盖片部分;
所述内盖片部分和所述外盖片部分相互固定,从而提供与所述包装层压材料部分连接的可定位盖片;
其中,所述外冲切和所述内冲切限定在所述外冲切和所述内冲切之间延伸的可再密封区域,所述可定位盖片中的所述可再密封区域包括部分所述压敏粘合剂层和所述包装层压材料中的所述可再密封区域包括部分所述剥离层,
其中所述膜层包含选自以下的材料:共挤出的定向聚丙烯(OPP)、共挤出的双轴定向聚对苯二甲酸乙二酯(BOPET)、聚氯乙烯(PVC)、邻苯二醛(OPA)、和其组合,
其中所述内封层包含选自以下的材料:线性低密度聚乙烯(LLDPE)、聚丙烯共聚物(Co-PP)、乙二醇改性的聚对苯二甲酸乙二酯(PETG)、和其组合,并且
其中所述可定位盖片选择性地可定位在以下两者之间:(i)打开位置,其中至少部分所述可定位盖片与所述包装层压材料间隔开,和(ii)闭合位置,其中所述可定位盖片密封地接触所述包装层压材料。
2.权利要求1所述的包装层压材料,其中所述聚丙烯共聚物(Co-PP)是聚丙烯三元共聚物(Ter-PP)。
3.权利要求1或2所述的包装层压材料,其中,所述压敏粘合剂层在所述层压材料中的所有位置处显示相对一致的组成。
4.权利要求1或2所述的包装层压材料,其中,在所述可定位盖片处于所述打开位置时,所述可定位盖片的所述可再密封区域中的至少部分所述压敏粘合剂层被暴露。
5.权利要求1或2所述的包装层压材料,其中,在所述可定位盖片处于所述打开位置时,所述包装层压材料的所述可再密封区域中的至少部分所述剥离层被暴露。
6.权利要求1或2所述的包装层压材料,进一步包括:
布置在所述膜层和所述内封层之间的阻挡层。
7.权利要求6所述的包装层压材料,其中,布置在所述膜层和所述内封层之间的阻挡层是第一阻挡层,所述层压材料进一步包括:
布置在所述外层和所述压敏粘合剂层之间的第二阻挡层。
8.权利要求6所述的包装层压材料,其中,所述内冲切延伸通过所述膜层和所述内封层之间的阻挡层。
9.权利要求1或2所述的可再密封包装层压材料,其中,所述内盖片部分和所述外盖片部分通过所述压敏粘合剂层和所述剥离层之间的接触相互固定。
10.权利要求1或2所述的可再密封包装层压材料,其中,所述内冲切限定延伸通过所述包装层压材料的口。
11.权利要求1或2所述的包装层压材料,其中,所述压敏粘合剂层包含丙烯酸丁酯和丙烯酸2-乙基己酯单体与各种增黏剂和加工酸的聚合混合物。
12.权利要求1或2所述的包装层压材料,其中,所述剥离层包含硅氧烷。
13.权利要求1或2所述的包装层压材料,其中,所述剥离层包含有机硅增滑剂改性的共挤出聚丙烯膜表层。
14.权利要求1或2所述的包装层压材料,其中,所述外层包含选自以下的材料:聚对苯二甲酸乙二酯(PET)、定向的聚丙烯(OPP)、聚氯乙烯(PVC)、邻苯二醛(OPA)、其共聚物、和组合。
15.权利要求6所述的包装层压材料,其中,所述阻挡层显示小于50cc/m2/24小时的透氧量。
16.权利要求6所述的包装层压材料,其中,所述阻挡层显示小于50cc/m2/24小时的透水量。
17.权利要求6所述的包装层压材料,其中,所述阻挡层包含选自以下的材料:聚偏1,1-二氯乙烯(PVDC)、乙烯乙烯醇聚合物(EVOH)、聚乙烯醇(PVA)、尼龙聚合物、和其组合。
18.权利要求6所述的包装层压材料,其中,所述阻挡层包含金属化铝层。
19.权利要求1或2所述的包装层压材料,其中,所述可定位盖片具有1N/in至10N/in的打开力。
20.权利要求1或2所述的包装层压材料,其中所述可定位盖片与所述包装层压材料密封地接合。
21.权利要求1或2所述的包装层压材料,进一步包含:
布置在所述外层上的印刷层,其中所述印刷层提供所述可定位盖片的所述外面。
22.权利要求1或2所述的包装层压材料,其中,所述外面进一步限定至少一个拆启标识符,所述拆启标识符限定在所述包装材料中的所述可再密封区域中。
23.权利要求22所述的包装层压材料,其中,所述拆启标识符包括延伸通过所述外层、所述压敏粘合剂层和所述剥离层的拆启冲切。
24.权利要求23所述的包装层压材料,其中所述拆启冲切延伸通过布置在所述外层和所述压敏粘合剂层之间的阻挡层。
25.权利要求22所述的包装层压材料,其中所述至少一个拆启标识符具有选自以下的形状:圆形、方形、矩形、卵形、三角形、和其组合。
26.权利要求1或2所述的包装层压材料,其中,所述内冲切是连续的。
27.权利要求1或2所述的包装层压材料,其中,所述外冲切包括至少一个非连续冲切区域,每一个非连续冲切区域适于在其中所述包装层压材料的所述可定位盖片被初次打开的初次打开操作之后切断。
28.权利要求1或2所述的包装层压材料,其中,所述外冲切包括两个非连续冲切区域,所述两个非连续冲切区域通过部分所述外冲切分开。
29.权利要求28所述的包装层压材料,其中分开所述两个非连续冲切区域的所述部分外冲切是弓形形状的。
30.权利要求1或2所述的包装层压材料,所述包装层压材料进一步包括布置在所述包装材料的所述可再密封区域内以及在所述压敏粘合剂层和所述剥离层之间的去粘材料区域。
31.权利要求27所述的包装层压材料,其中,所述包装层压材料进一步包括布置在所述包装材料的所述可再密封区域内以及在所述压敏粘合剂层和所述剥离层之间的去粘材料区域,其中所述去粘材料接近至少一个非连续冲切区域。
32.权利要求29所述的包装层压材料,其中,所述包装层压材料进一步包括布置在所述包装材料的所述可再密封区域内以及在所述压敏粘合剂层和所述剥离层之间的去粘材料区域,其中所述去粘材料接近分开两个非连续冲切区域的外冲切的弓形部分布置。
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