CN110817113B - 拉片式密封部件 - Google Patents
拉片式密封部件 Download PDFInfo
- Publication number
- CN110817113B CN110817113B CN201911077744.2A CN201911077744A CN110817113B CN 110817113 B CN110817113 B CN 110817113B CN 201911077744 A CN201911077744 A CN 201911077744A CN 110817113 B CN110817113 B CN 110817113B
- Authority
- CN
- China
- Prior art keywords
- layer
- sealing member
- polymer
- polymer layer
- tabbed sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
具有结实的拉片结构的拉片式密封部件,其在所述拉片下以及拉片枢转处或转折接合处具有额外的支撑物。
Description
本申请是以下申请的分案申请:申请日:2016年3月3日;申请号:201680002581.X;发明名称“拉片式密封部件”。
相关申请的交叉引用
本发明要求2015年3月3日提交的第62/127,545号美国临时专利申请的权益,其全部内容通过引用并入本文。
技术领域
本发明涉及用于容器的拉片式密封件、制作这种拉片式密封件的方法,以及特别地涉及用于在容器的密封叠层体上形成拉片的改进。
背景技术
常常需要使用密封部件或内密封件来密封瓶子、罐子或其它容器的开口。通常将盖子或其它封闭件拧到或放置到颈部或其它容器开口上。在使用中,消费者通常移除盖子或其它封闭件来接触密封件,并从容器上移除密封件或以其它方式分离密封件,以使用或获取其中所含之物。
对于密封容器开口的最初尝试包括一种感应式或传导式内密封件,其覆盖容器的开口,在开口处密封件通常符合该开口的形状,使得圆形容器开口被与该开口及其环边或上表面大致相同尺寸的圆盘密封。这些现有密封件通常具有热活化密封材料的下层来将密封件的周缘固定至围绕容器开口的环边或上表面。当密封件暴露在高温中时,下层粘结到容器环边。在许多情况下,这些密封件包括箔层,以提供感应加热以活化下热密封层。这些现有的密封件意在提供良好的密封,但是因为没有什么东西可以让消费者抓住以便移除密封件,所以由消费者移除是困难的。通常,消费者需要用指甲挑起密封的边缘,因为只有很少的或没有密封材料可供抓持。
用于容器的密封件的其他类型包括侧拉片或从所述密封件的外周边缘向外延伸的其他凸缘。这些侧拉片一般不固定到容器环边,其提供了抓持面供用户捏住并分离密封件。但是,这些侧拉片延伸过容器环边的侧面,并经常伸出到封闭件的螺纹部分中。如果侧拉片过大,该构造可能负面地影响密封件形成良好密封的能力。当封闭件或其它盖子位于容器上时,侧拉片(且通常是未密封衬垫本身)会由于封闭件和密封件的拉片式部分之间的接触而变形或起皱。为了尽量减少这些问题,侧拉片通常很小;因此,提供了非常小的表面积或材料以供消费者抓持来移除密封件。
而密封件的其他类型包括具有限定在密封件顶部的拉片的密封部件。这些现有的密封件的一种方式包括涂覆压敏粘合剂的局部层,以将拉片固定至箔层。这种类型的顶拉片式密封件提供了较大拉片的优点,这对于消费者握持并分离密封件提供了更多的握持区域。在这种方式中,拉片由延伸横跨密封部件的整个表面的一整层形成,但是该一整层仅粘结至一半的密封件上,以形成拉片。在其他方式中,密封件可以包括由额外的一整层薄膜利用部分纸或部分聚合物层(称为分离层或拉片座)与额外的一整层粘合剂结合而构成的拉片,以形成拉片。该部分层也可以插入在额外的一整层粘合剂和下密封件部分之间,以防止拉片粘在下方的形成该拉片的层上。
发明内容
附图说明
图1是示例性拉片式密封部件的立体图;
图2是一种拉片式密封部件的横截面图,该拉片式密封部件包括分离层,分离层由折叠的、缠绕的或圆柱形的分离膜、纸或泡沫层形成,该分离层可以是单个的或多个的层或者可以是共挤出层;
图2a是具有两部分分离层的另一种拉片式密封部件的横截面图;
图3a是具有死折的示例性折叠分离层的横截面图;
图3b是由两个单独层粘结或焊接在一起形成的示例性折叠分离层的横截面图;
图4a是示例性圆柱形分离层的横截面图;
图4b是示例性缠绕的分离层的横截面图,其不是管,当端部向后彼此缠绕在一起时,在其中形成裂隙;
图4c是示例性圆柱形分离层的横截面图,经由两个独立的层形成(从而圆柱体不是一个整体的或连续的管状材料)并且在其相对的端部被热粘结或焊接;
图5是叠层体片材的横截面图,叠层体片材配置成使拉片式密封部件从叠层体片材被冲切开,示例性间隔开的分离层放置在其中;
图6是制作本发明的叠层体片材的示例性方法;
图7是一种拉片式密封部件的横截面图,该拉片式密封部件包括非对称折叠分离层,其中分离层的顶部分比分离层的底部分长;
图8是一种包括顶泡沫层的拉片式密封部件的横截面图;
图9是一种包括放置在箔层底下的发泡或非发泡隔离层的拉片式密封部件的横截面图;
图10是一种包括隔离层的拉片式密封部件的横截面图,隔离层可以是发泡或非发泡的,位于箔上方但位于本文中所描述的各种分离层的下方;
图11是一种包括分段层的拉片式密封部件的横截面图,分段层邻近本文中的各种分离层,以平均所述密封件的拉片式侧和非拉片式侧之间的压力和/或厚度;
图12是一种包括箔层的拉片式密封部件,箔层被移至本文中的各种分离层的上方,从而箔被靠上放置在拉片中;
图13是一种包括本文中的各种分离层的拉片式密封部件,各种分离层直接地粘结至顶聚合物支撑层;
图14是另一种拉片式密封部件,不包括分离层,但包括可熔材料的部分层,可熔材料被吸收入吸收层以形成拉片;
图15是另一种拉片式密封部件,包括具有分段的脱粘剂或滑脱剂的层,脱粘剂或滑脱剂仅在被配置形成拉片的层的部分中;
图16是示例性拉片式密封部件的横截面图,拉片式密封部件构造成两件式的组合件,具有涂覆在其上的蜡粘结衬垫;
图17是另一种两件式组合件的横截面图,该两片式组合件包括拉片式密封部件,该拉片式密封部件具有涂覆在其上的蜡粘结衬垫,该拉片式密封部件包括形成拉片的折叠的、缠绕的或圆柱形的分离层,且在上叠层体中没有其他层;
图17a是图17的拉片式密封部件的横截面图,且附加了发泡聚合物层或非发泡热分配层;
图18a是挤出膜,具有在其中挤出的间隔的袋状部;
图18b是一种包括图18a的挤出膜的拉片式密封部件的横截面图,利用其袋状部以形成拉片;以及
图19是包括EVA层的膜叠层体的横截面图,EVA层粘结至PET膜,利用了在其之间的部分聚合物层。
具体实施方式
如上所述,拉片式密封部件通常与容器上的盖或其它封闭件使用。盖或其它封闭件典型地是旋拧或以其他方式固定到容器的口部或颈部,将拉片式密封部件捕捉在盖的顶部和容器环边之间。在许多情况下,盖在其顶部内表面的下侧具有环形卷边或向下突出的环(有时称为珠线)。当盖被固定到容器时,这个环形卷边的大小和位置被设定以大致与容器环边的上合模面对应。这个环形卷边有助于提供压力以将密封部件固定到环边合模面。然而,许多现有的密封件包括泡沫层或其他低熔点聚合物层,以提供对来自在热密封工艺中产生的热的支持和/或隔离。在某些情况下,在盖密封过程中,泡沫层或聚合物层在与盖的环形卷边相互作用中会存在问题。来自盖密封工艺的热量与来自泡沫层上的环形卷边或密封部件中的其他低熔点聚合物层的聚焦的向下的压力结合,会对容器环边上方区域中的泡沫层或其他聚合物层造成损坏或导致劣化。在极端的情况下,聚合物层可能会熔化、降解,或者泡沫中的空气囊可能会崩塌。当盖密封工艺过密封时(即,当在盖密封过程中,过多的热量被施加或热量施加时间过长),这个缺点更普遍。
这种熔化和/或气囊崩塌会导致叠层体中和/或在密封部件的周缘区域的金属箔或其他聚合物层的暴露。在某些情况下,当消费者抬起拉片以除去密封件,呈现给消费者的是在有完好中心部分和熔化的或损坏的边缘部的拉片下,具有不均匀的顶层的难看的密封件。在极端情况下,拉片下的叠层体的外周部可以完全熔化,这暴露了拉片下的金属箔或其它层。
现有的包括优选完全限定在密封部件的周界内并且由部分分离层形成的拉片的密封部件在该拉片被拉动时,会易于在拉片向上枢转的连接处或转折接合处产生应力焦点。通常,在拉片被拉动时,其应力向下辐射并远离此转折接合,进入拉片下方的层中,并且在一些情况下,导致在紧接拉片下方的该层在转折接合处撕裂或拉片在转折接合处撕裂。在一些情况下,这些失败往往在现有的拉片式密封件设计中更成问题,当紧接在拉片下的层是发泡聚合物时,不过根据这些下层的厚度、组成和/或密度,也可能发生在其他类型层中。
本文所描述的各种拉片式密封部件通过在叠层体周围的拉片下并且在上部件或上叠层体和下部件或下叠层体之间的拉片枢转或转折接合处提供额外的支撑物来提供更结实的拉片结构。这种结实结构给拉片式密封部件提供了同心稳定性,以使拉片式密封件在其绕容器环边合模面的外周边缘处保持与在离开该边缘的径向内部部分的结构完整性相一致的一致完整性。本文中的结构还通过在拉片的转折或枢转接合处的额外的支撑物提供转折稳定性,来提供进一步的强度并在用户拉动枢转拉片的时候有助于消散拉应力。因此,本文的密封部件在热密封工艺以及消费者拉动拉片移除密封时易于在外周边缘以及拉片转折接合处保持拉片下方的层的整体性。
例如,本文的结构可以提供在拉片枢转或转折接合处的更刚性的、非泡沫层,并且还提供在拉片拉应力的焦点下方的更刚性的、非泡沫层,以当拉动拉片时提供更结实的叠层体结构。在本发明的方式中,拉应力通过更刚性的枢轴或转折接合消散,其中该转折在某些方式中通过支撑该拉片的其他部分的同样材料的活动转折接合来支撑。在某些方式中,该转折和转折接合也都配置成通过在拉片转折接合下方的更致密的、更刚性的层来向下消散应力,由此给容器提供能够承受更强的热密封粘结的更结实的拉片。
总体上,本文的构思描述了一种用于容器的拉动拉片的密封部件(或用于形成这种拉动拉片的密封部件的叠层体片材),其包括具有拉动拉片的上部件或上叠层体,该拉动拉片粘结至能够被热密封至容器口部或开口的下部件或下叠层体。在一个方面中,本文的密封部件包括拉动或抓持拉片,其被限定在完全在密封部件的周界之内的上叠层体部中。本文中的各种密封部件和叠层体包括改进的结构以形成如上所述的更结实且更强的拉片。
现在转至本文附图中总体所示的更多细节,图中示出了加强的自由拉片的拉片式密封部件。图1中,以叠层体12的形式提供了一种通用的拉片式密封部件10,叠层体12由柔性片材和/或挤出的薄膜材料形成,下部件或下叠层体部14用于粘结至容器环边16和上部件或上叠层体18,上部件或上叠层体18部分地粘结至下部件,以形成自由部或抓持拉片20(在转折接合21处),自由部或抓持拉片20优选完全限定在拉片式密封部件10的周界22之内。在使用中,通过拉起拉片20,用户可以如图1所示使拉片在转折接合21处向上枢转并使用拉片将密封部件从容器环边或其他容器部16上移除。在一种方式中,通过拉起拉片20,从容器环边上一整片地移除密封部件。
图2示出了关于一个示例性拉片20是如何在本发明的情形中被形成的更多的细节。在图2的方式中,拉片由折叠的、缠绕的或圆柱形的且在其中包括死折101的分离层100或片材形成。折叠分离层100形成顶折叠部分102和下折叠部分104,顶折叠部分102粘结至在其上方的层,下折叠部分104粘结至在其下方的层。死折101在顶和下折叠部分102和104之间。优选地,折叠分离层100不是管或由管或任何管状材料获得的。分离层100的顶和下折叠部分102和104的内侧表面互相不粘结,并且允许拉片20在死折或转折线处形成,因为顶折叠部分和在其上方的任何层都不粘结或固定至其下方的层,形成了可以自由向上枢转的自由部。
在图2的方式中,密封件10包括至少具有支撑聚合物层108和粘结层110的上叠层体106。该密封件还可以包括具有箔114的下叠层体112、可选的聚合物层116,以及下密封剂或热密封层118。图2的密封件包括各种层,它们只是可以被包括在折叠分离层100中以形成具有加强的拉片的拉片式密封部件的示例性层。也可以按需包括其他层。例如,图2的密封件还可以包括如本文中进一步讨论的在箔上方和拉片下面的发泡或非发泡聚合物层。
在如图2a中所示的另一种方式中,示出了另一种分离层100a,其中分离层100a不是具有死折的连续的折叠片材、缠绕或圆柱体,而是彼此不结合或为一体的两个独立的层102a和104a(并且因此不包括死折)。就是说,顶部分102a可以是与底部分104a独立的层,各自与邻接它们的层结合,但不是彼此结合。更特别地,层102a可以与其上方的层结合,层104a可以与其下面的层结合,但层102a和104a彼此不结合或粘附。
图3a、3b、4a、4b和4c提供进一步的示例性折叠分离层或片材的例子。这些分离层可以与本发明的任一拉片式密封部件一起使用。图3a更详细地示出了一种类型的示例性折叠分离层100,其可以是单个层(未示出),或如图3a中更具体地示出的,具有多于一个层的多层叠层体或共挤出膜。折叠分离层不是以一个管的形式形成,而是由折叠在一起的扁平片材形成。图中示出两个层,其形成折叠分离层结构,但是叠层体或共挤出膜可以按需地包括其它层,以用于特定的应用。在图3a的示例结构中,折叠分离层100可包括内层130,比如内部支撑聚合物层,如聚酯(例如,聚对苯二甲酸乙二醇酯(PET))或内纸层。折叠分离层100就可以具有外层132,而外层132可以是具有内层的叠层体或共挤出物。外层132可以是可热粘结聚合物(比如乙烯乙酸乙烯酯(EVA)、乙烯丙烯酸甲酯(EMA)、聚丙烯、聚乙烯、聚氨酯、它们的共聚物以及类似物)、发泡聚合物层(比如发泡聚烯烃)、具有熔点比内侧层低的另一个聚合物层,和/或粘合剂层。内层130也可以是发泡聚合物层。折叠分离层100也可以包括两个以上的层,并包括上述建议的层(聚合物、泡沫、纸、粘合剂等)的任意组合。在两个层之间可以有薄的粘合剂联结层,或甚至是在内层和外层之间具有粘合剂粘结层的3层式叠层体。在一些方式中,如图2总体示出的,外层132允许折叠分离层100能够通过热粘结或粘合剂粘结,来粘结到上叠层体和下叠层体。
在另一种方式中,折叠分离层100可以包括发泡聚合物层作为与外层组合的内层,它是与粘合剂或可热粘结聚合物(例如,EVA)组合的聚合物支撑物(例如,PET、PEN、尼龙等)。替代地,折叠分离层100还可以是单个的泡沫层或在其外表面上具有粘合剂薄层的单个的泡沫层。
在又一种方式中,折叠分离层100可以是纸层,其外表面上有粘合剂或可热粘结材料(例如,EVA等),或者是淋膜纸,其外表面上有粘合剂或任何可热粘结材料。如下面进一步解释的,分离层100(在任何上述方式中)也可以根据需求穿有孔、狭缝、微孔等,以使得易于折叠和从折叠组合件的内部除去空气。
图3b示出了折叠分离层100的另一种方式。在这种方式中,上折叠部分102是与底折叠部分104独立的层,使得折叠分离层不是连续的,并且每个折叠部分彼此不是一体的。在这种方式中,两个部分102和104可以通过热、粘合剂、冷密封或其它粘结来与各折叠部的一端在焊接接点134处结合。此处,如前面图3a所描述的,层100可以是任何的单层或多层薄膜和材料。
在图3a和3b的方式中,折叠分离层100优选不是管,并且不经由任何管状材料或薄膜形成,而是通过薄膜的扁平片材(或根据情况可以是多层的叠层体)形成,然后被折叠以形成死折101或被结合以在插入到所要的叠层体中之前形成焊接接点136b,比如在图2中或任何本文的其它结构所示的。
在另一种方式中,如图4a所示,分离层100可以通过圆柱形材料、片材或薄膜来形成,或者通过在插进叠层体(比如图2的叠层体)之前,撕裂、切割和/或折叠圆柱形材料、片材或薄膜来形成,或者在冲切期间以折叠圆柱体形式插入到叠层体中并切割,以形成最终的拉片式密封部件,其中该圆柱体随后被切割以形成分离层。如图4a所示,分离层100还可以是包括两个相对的死折136a的折叠圆柱体。如所示的,圆柱体还可以包括类似于之前以上描述的多个层,并且为了一致而重复使用参考编号。该圆柱体还可以是单个层,或者如所示的,是多层叠层体。
在分离层100的圆柱形方式(或甚至是折叠片材方式)中,当折叠圆柱体以产生死折时容易产生圆柱体内空气滞留的问题,而且经由叠层工艺将这种折叠圆柱体插入也易于产生问题。因此,在一些方式中,圆柱体可以由穿孔材料或薄膜构成,以有助于释放任何滞留的空气。如所示的,图4a中仅示出少数几个穿孔138,但应该理解,穿孔可以是一个或多个,或者,在一些情况下,根据需要,可以是多个切割线、针孔、微孔、缺口、开口等,以及它们的任何组合,其允许足够的空气穿过薄膜,以使圆柱体可以折叠扁平而没有显著的会妨碍叠层和圆柱体折叠保持扁平的空气滞留。如果圆柱体包括多个层,穿孔138可以延伸穿过所有层。
在一种方式中,本文中的折叠的或圆柱形的分离层包括有微孔的聚合物薄膜,或由有微孔的聚合物薄膜形成。该层可以具有多个微孔或微腔138,其形成在至少一个表面142处或至少一个表面142中,并且从其至少一个表面142延伸进入该层的本体中。微孔可以延伸穿过薄膜和/或延伸穿过多个层或者可以是与内和外空气可渗透层(比如泡沫层)组合的单个穿孔层。穿孔138可以是在整个圆柱形层100以及其表面142上随机地间隔开的或者分配的,并且延伸进入并且在一些情况下穿过形成圆柱形分离层100(或者任何其他与层100组合的层,或本文所描述的任何类型的分离层)的层或多层。应该理解的是,图4a中(和其他图中)所示的微孔为了示意的目的而被夸大。这些穿孔可以具有适用于特定应用的不同的形状、尺寸、结构,以及间距。如所示,穿孔总体从外表面142向内延伸至层100的主体,但是穿孔也可以从相对侧向内延伸,或者可以从两侧向内延伸。一些穿孔优选一直延伸穿过形成分离层100的层或多层。其他穿孔可仅部分地延伸到该层的主体中。合适的薄膜的一个例子可以是来自日本纸浆和造纸(杜塞尔多夫,德国)。在一些方式中,层100可以具有由ISO 15105-2/DIN 53380-3测量的约5,000厘米3/(米2×天×1巴)或更高(约23℃,约0%相对湿度)的氧气传输速率(OTR)。在其他情况下,OTR为约12,000至约15,000厘米3/(米2×天×1巴),并且在其他情况下,约12,500厘米3/(米2×天×1巴)或更高。层100也可以具有由ISO 15106-3在约38℃和约90%/0%的相对湿度下测定的约150至约250克/(米2×天)的水蒸气透过率(WVTR),而在其他方式中,约200至约250克/(米2×天),而在另一些方式中,约226至约227克/(米2×天)。
在一种方式中,有微孔的聚合物薄膜是聚酯层,比如PET,它提供了一个合适的刚度以及通过各个穿孔的空气通道。在一种方式中,聚酯层可为约5至约23微米厚,而在其它方式中,约10至约20微米厚,在又一其他方式中,约10至约12微米厚。用于本文中的分离层的聚合物层在纵向方向和/或横向方向上可具有约10至约20千克/毫米2的拉伸强度,并在一些方式中具有的纵向方向拉伸强度大于横向方向的拉伸强度。在一些方式中,该层还可以具有约20%至约25%的断裂伸长率,在其他方式中,约10%至约21%,而在另外的方式中,约14%至约21%。在一些情况下,断裂伸长率在纵向方向上可以大于在横向方向上。
在图4b中,分离层或片材100可以近似圆柱形材料,但可以不被结合到圆柱体中,而是被缠绕或折叠在其自身上,使得材料片材的端部可以彼此邻接,而不是被结合成一个连续的或整体的管。在这种方式中,缠绕膜的相邻端部形成间隙139或其他也允许滞留空气从在折叠或叠层时从缠绕的分离层100内释放的间隔。再次,图4b的所述缠绕的(但不是管状的)分离层100可以包括任何如先前所讨论的单个层或多个层,并且还可以包括孔洞、针孔、狭缝,穿孔、微孔等。
图4C示出了适合于本文所描述的各种拉片式密封件的分离层或片材100的另一种方式。在这种方式中,分离层100是由被焊接、热密封或粘结在相对端部136b处的两个单独的片材或薄膜形成的非连续(或非一体的)圆柱形分离层。这种方式可以包括任何先前描述的单层或多层薄膜或本文描述的用于分离层的材料,或者由其构成。
暂时转向图5和图6,提供了示例性叠层体片材1000和制作这种叠层体1000的方法,使用先前讨论的图中示出的折叠的、缠绕的或圆柱形的分离层100。在图5中,各种分离层100被示出,插入在被设计以形成拉片式密封部件10(即,典型地来自图1和本文的其它附图)的层的叠层体中。此处,分离层100被一般性地示出,但为了示例性目的,来自图2,3和4的三个不同类型的分离层被示出在相同的叠层体中(从图3b在左侧被折叠和焊接,图4a,b或c中在中间的圆柱形和图3a在右边的折叠),但是应该理解,这样类型的分离层通常不会被混合在同一叠层体1000内。通常同一时间只有一个单一类型的分离层会被使用。图5是为了说明各种类型的分离层100插入在叠层体1000之内,以及图5和6中的分离层100可以是任何先前描述的折叠的、缠绕的或圆柱形的层。拉片式密封部件可以是使用常规技术如冲切虚线所示从片材1000冲切而成的。应当理解,任何本文中的拉片式密封部件可以图5的片材1000和图6的工艺通过改变叠层体片材内的层的结构来形成。
图6示出在折叠的、撕裂的或缠绕的以及被引导进入辊隙1002中的各种分离层100,其中上叠层体106和下叠层体112的各种层都被合在一起以形成组合的叠层体片材1000。在一些方式中,各种不同的分离层100可以通过以上提到的穿孔的、撕裂的、打洞的、裂口的或有微孔的薄膜形成;因此,当层100进入辊隙1002,夹带的空气的分离层的上部和下部之间滞留的空气可以通过薄膜逸出,以使得易于使分离层100保持扁平、折叠并且在辊隙处基本上没有皱褶。由于形成分离层100的各种材料可以在外表面上包括粘合剂或可热粘结材料,当该分离层100与其他层106和112进入辊隙1002,分离层随后在施加热时将会被粘结至其上方的层和其下方的层。如果使用可热粘结材料,辊隙可以被加热。在分离层100的内表面上可以有分离涂层,以使顶部分102的分离层内表面不粘附于底部分104的分离层内表面。
转向图7,示出了另一示例性拉片式密封件10。在这种方式中,分离层包括如先前所描述的那些类似的折叠层100,但在这种方式中,上折叠层部分102比下折叠层部分104更长,以形成一个非对称的分离层。在这种方式中,下折叠层部分104不具有与下叠层体部分112的外边缘或周缘汇合并终止于此的外边缘。即,下分离层部分104的外边缘和叠层体112的边缘或周缘之间存在间隙或空间105,下叠层体112的上表面被暴露并可见。该间隙105可以创建一个小的空间或其它指甲间隙,使得用户可以更容易地在使用中枢转拉片。此处,非对称的分离层100(即,顶部分比底部分更长)也可以是任何先前讨论的材料,其被描述为适用于分离层,并且可以是单层或多层膜或叠层体,并且可以由折叠的、缠绕的,或有狭缝的圆柱形分离层形成。另外,在图7所示的叠层体中的其余的层没有特别的限制,并且非对称分离层可以被并入任何本发明中所描述的拉片式密封部件中。应该理解的是,非对称的分离层100还可以具有更短的上部102和一个更长的下部104。
图8-10示出具有任意前述分离层100的示例性拉片式密封部件,并且示出拉片式密封件的不同实施例或版本。本领域普通技术人员应当理解,这些附图中的具体结构不是相互排斥的,且这些附图中的任何层都可以与其他实施例中的其他层使用或互换。还应当理解,在单个附图中包含特定的分离层100或片材并不意味着该附图的拉片式密封部件的特别构造受限于这种分离层。本文中的任何分离层能够与本发明的任何叠层体结构一起使用。在这些方式中,组合件中的层都可以根据需要为特别的应用而变化。例如,可以在叠层体内的不同位置提供发泡聚合物或非发泡聚烯烃隔离层109(比如在美国专利8,057,896中描述的,其通过引用并入本文),以提供所需的隔离和特定应用所需的热重定向。如下面所讨论的,聚合物泡沫在实施例中为了简单而被使用,但是这种层也可以是如在上述'896专利中描述的非发泡热再分配聚烯烃层。
更具体地并且在图8的方式中,拉片式密封件的顶层可以是发泡的或非发泡的隔离层109。例如,层109可以是顶泡沫层,层110可以是可热粘结或粘合剂层(例如EVA或类似物),层100可以是任何上述的分离层,层114可以是箔,层116是可选的,并且可以是聚合物支撑层,例如,但不限于,PET、PEN、尼龙等,层118可以是热密封件或压敏粘合剂层。密封件10粘结到容器环边16。
图9是隔离层109(发泡或非发泡)在箔层114下面的拉片式密封件10的另一种方式。在这种方式中,密封件的顶层是聚合物支撑层116。其它层类似于前面的图。
图10示出了另一种方式或实施例,发泡或非发泡的聚合物隔离层109在箔114的上方和分离层100的下面,使得分离层的底部分104不直接粘结到箔层114,而是直接粘结到隔离层109。该方式的其余层可类似于先前描述的那些层。
图11示出了使用分段构造的又另一种方式或实施例。在这种方式中,包括了邻近或邻接分离层100(当拉片被向下折叠时任何优选在同一叠层体平面内)的分段层200,以帮助在密封件的拉片式和非拉片式侧面之间提供更均匀和一致的压力和厚度。由于各种折叠的、缠绕的以及圆柱形的分离层100往往因顶部分和底部分102和104(当折叠在一起时)而较厚,因而在密封件的左侧和右侧之间容易有厚度变化。为了帮助解决这个厚度不均的问题,密封件10可包括在下叠层体112的顶层上方的分段层200,其可以是层109、114或116(视情况而定可以是箔、泡沫、聚合物),以帮助使厚度均匀。分段层200可以是聚合物层,如PET、聚烯烃、尼龙以及它们的组合物,延伸横跨部分的密封件并覆盖分离层100没有覆盖的区域。因此,分段层200和分离层100的组合物能将整个密封件覆盖,而且当组合在叠层体中时,分段层和分离层100的厚度将会是一致的和/或相同的。分段层200可以具有与分离层100的上部分102和下部分104相同或一致的厚度。如本文中所使用的,一致是指在约+/-5%到10%的范围内。
在又一方式中,拉片式密封部件可以是任何先前讨论的构造,但没有任何箔层或其他感应加热层。这种类型的密封件可以使用传导热或者直接加热容器表面而不是经由感应加热构造和/或密封至容器。
图12示出另一种拉片式密封部件10,其中箔层114根据需要被移至另一位置以用于特定的应用。例如,箔或任何可感应加热层114可以从下叠层体112(如总体在先前的构造中示出的)向上移动进入上叠层体106。在这种形式下,折叠的、缠绕的或撕裂的圆柱形分离层100可以在最终的叠层体结构内的箔下方。更具体地,图12示出了这种结构的一个例子,可选的箔层114在分离层100之上并定位在上叠层体106内部中和在形成的拉片的内部中。可替代地,分离层100也可以根据需要被包括在下叠层体112中的任何层下方以用于特别的应用。例如,分离层100可以在图12所示的叠层体之内的隔离层109下方或支撑层116下方。如果需要的话,图12的下叠层体112也可包括在下叠层体(未示出)中的第二箔层,使得该构造包括双箔组合件,一个箔在上叠层体106中,另一个箔在下叠层体112中。如果使用的话,此第二箔层可以在下叠层体112中的任何层之间,或形成下叠层体112的顶表面。
折叠的、缠绕的或圆柱形的分离层100也可直接粘结到上叠层体106的顶层(如层108)。这在图13中用举例说明了,其中折叠的、缠绕的或圆柱形的分离层100的顶折叠部分102直接粘结到上聚合物支撑层108。此处,层108也可根据需要通过粘合剂或其它粘结方式直接粘结至下叠层体112,例如,在层108处于未折叠状态时,通过使用如图3和4中所示的任何多层结构,可以实现层108被直接粘结至其下方的层。在这种形式中,层108可以是PET/EVA组合,或者,分离层可以是EVA/PET折叠的、缠绕的或圆柱形的材料。
现在转到形成拉片式密封部件的各种替代方案,图14-15的构造提供不具有任何前述的分离层的拉片式密封部件。在这些方式中,不同类型的可变形分离材料,如蜡、滑石、碳酸钙、滑爽剂、聚乙二醇(PEG)或聚丙二醇(PPG)等也可被用于阻碍或防止顶叠层体1118或2118粘结至下叠层体1114或2114,以形成抓持片1120或2120,甚至不使用先前描述的分离层。
在图14中,拉片1120可经由一个最初被示为层1152的部分层来形成,但是这个部分层1152在感应加热过程中熔化或流动,被它下方或上方的层吸收。例如,层1152可以是蜡、PEG或PPG,而它正下方的层1142(或者正上方的层)可以是被构造成在感应加热后吸收熔化的或可流动的层1152的任何吸收层或材料。因此,层1142可以是纸层、泡沫层或任何吸收性聚合物层。层1142也可以是或包括对齐或交织在一起的合成纤维。一个例子是SynthaSealTM材料。因此,在热密封后的最终所得密封件中没形成被限定的分离层,但在初始密封处理和形成过程中存在形成层1152的材料,并且该层在感应密封期间熔化并被在它下方的(或在它上方)的层吸收,以形成拉片,在此以层1120示出。在此方式中,应当理解,以粘结1158示出的密封件的各部,被粘结或固定在一起,而1152上方的层被粘结在一起并形成拉片1120(即,层1152上方的叠层体1118的各部不被粘结到其下方的叠层体1114的各部,以形成拉片)。拉片1120能够类似于图1中所描绘的向上枢转。
图14的方式中的其他示例性层可以是上聚合物支撑物1150(PET、PEN、尼龙、聚烯烃以及它们的共聚物)和可选的聚合物层1148和1146(或者根据需要也可以是发泡或不发泡聚合物层以提供隔离、支撑和/或重定向热;或者可以是以上讨论的任意的发泡聚合物或非发泡聚合物热再分配层)。层1144可以是可热粘结层,如EVA或EMA。层1134可以是箔,而层132可以是热密封件或PSA。根据需要,该结构也可以包括阻挡层。
蜡、PEG或PPG材料1152可以是涂覆在下叠层体1114的上表面或上叠层体1118的下表面上的材料的道或条。使用图6作为参照,现有方式中的分离层100可以用涂覆蜡、PEG或PPG的道代替,在敷至叠层体工位1002之前先被敷至网状件108或者网状件112。
应该理解的是,图14中示出蜡、PEG或PPG被敷至上叠层体1118,吸收层1142在下叠层体1114中。可以反过来,在上叠层体中具有吸收叠层体1142,而蜡、PEG或PPG敷至下叠层体。
可替代地,图14中材料的部分层以元件1152表示,它可以是敷至上叠层体或下叠层体的滑石或碳酸钙,防止上叠层体的拉片部1120粘结至它下方的层。类似于蜡型的应用,滑石或碳酸钙可以以道或带的形式敷至对应于最终产品中的拉片的上叠层体或条状的下叠层体或部分层。滑石或碳酸钙被定位在所设计的拉片形成的位置,并且仅敷至密封件的一部分上,如对应于例如图14中的区域1152的部分。滑石或碳酸钙防止或阻碍上叠层体1118中的拉片部分粘结至拉片底下的下叠层体部分1114。
图15示出了形成不具有分离层的拉片式密封部件的另一个替代方式。在这种方式中,上叠层体2118中的下层2144是具有混合在其中的改性的或分段的脱粘剂(比如改性的滑脱剂)的薄膜层,如由在图中的区域2152所示。脱粘剂或滑脱剂2152仅部分地在对应于拉片的区域2152的薄膜2144中提供。在一个示例性使用中,脱粘剂或滑脱剂大量散开在表面(如顶叠层体2118的下表面)上,并基本上防止薄膜表面2144粘结至它下面的层,然后形成拉片2120。在一种方式中,脱粘剂或滑脱剂是脂肪酸酰胺、二氧化硅、滑石、碳酸钙、芥酰胺和/或油酰胺,以及它们的组合。
图15的拉片密封部件还可以包括其它层。那些在图15示出的仅是示例性的并且可以变化。例如,密封件可包括上聚合物支撑物2150(PET、PEN、尼龙、聚烯烃)和任选的聚合物层2148和2146(或者根据需要也可以是发泡的或非发泡的聚合物层以提供隔离、支撑或重定向热;或者可以是如前面讨论的任意的发泡聚合物或非发泡热再分配层)。层2144可以是具有如上述的分段的脱粘剂或滑脱剂2152的可热粘结聚合物薄膜(EVA、EMA、聚烯烃等)。在示范性的下叠层体中,层2142是如前所述的可选的聚合物薄膜(PET、PEN、尼龙、聚烯烃等)、聚合物泡沫或非发泡热再分配层。层2134可以是箔,而层2132可以是热密封层或压敏粘合剂(PSA)。
在某些情况下,可以理解,本文所描述的密封部件以单件或两件式的密封部件构造来起作用。单件的密封部件通常仅包括粘结至容器环边的密封部件。盖子或封闭件也可以与其使用。两件式密封部件包括本文所讨论的暂时粘结到衬垫的密封部件。在此构造中,密封部件被粘结到容器的环边,并且衬垫被配置成在加热期间与密封部件分开,以被保留在容器上使用的盖子或其他封闭件中。在两件式构造中,例如,蜡层可用于暂时将密封部件的上表面粘结至衬垫。在感应加热期间,蜡层熔化,并且通常吸收到衬垫中。因此,该衬垫与密封部件分离。然后该衬垫通常保持留在盖子中,而密封部件通常保持粘附到容器环边。其它类型的可分离层(除蜡之外)也可以被用来提供在密封件和衬垫之间的临时粘结。本发明的任何示例性拉片式密封部件还可以与用蜡粘结至拉片式密封部件的顶表面的衬垫组合。在某些情况下,可以有纸层作为下叠层体中的顶层,并且它吸收蜡,并且该衬垫是泡沫。
这种两件式的组合件的例子在图16和17中示出,其中示出了两件式拉片式密封部件10,蜡层90粘结至吸收衬垫92。应当理解,本文中的任何拉片式密封部件都可以以这种方式进行构造,而且图16中的结构不是限制性的而仅是示例性的。图17还示出了另一种形式的拉片式密封部件,使用了前述折叠的、缠绕的或圆柱形的分离层100且没有其他上叠层体(除了本文中的分离层100中的一种之外),从而分离层100的上部分102形成不具有其他结构的拉片20。在图17的方式中,它被示为两件式密封件和衬垫,但可以理解的是,图17的拉片式密封件也可以不使用衬垫和蜡粘结。在这种方式中,分离层100可以包括任何先前在图2、3、4、5和7中讨论的特征。
图17的拉片式密封件还可以包括在分离层100底下和箔114上方的发泡聚合物或非发泡热分配层。该替代结构示于图17a中。在图16、图17和图17a中,其它层都与前面描述的那些层一致,因此,不在这里进一步讨论。
图18a示出了用于形成适用于任何本发明的拉片式密封部件构造的分离件或层100的又一示例性的方式。此处,薄膜2000被形成,其包括在挤出薄膜内的挤出的并且整体限定的空腔2001。空腔2001可以是绕聚合物薄膜间隔开的气泡、空气袋、空隙等。袋状件2001以道或带的形式,横向或纵向跨过薄膜延伸。图18a的薄膜2000随后可以被插入到叠层体片材中,比如取代分离层100的片材1000,而且当冲切时,形成图18b的拉片式密封部件。当拉片式密封部件被冲切时,会产生该示例性的拉片式密封部件或叠层体。图18b的叠层体可以包括聚合物支撑物2108(PET、PEN、尼龙或聚烯烃)、箔2114、可选的聚合物层2116和热密封件或PSA 2118。然而,应当理解,在本文中描述的任何拉片式密封部件都可以使用空腔分离层薄膜2000来取代先前讨论的分离层100。
图19示出了另一个包括粘结至EVA 3001的PET 3000的叠层体,间隔层3002被定位在EVA 3001和PET 3000之间。在这种方式中,PET和EVA在间隔层的相对侧面上被粘结在一起。间隔层没有被粘结到PET或EVA中的一个。
现在更详细描述在上面例子中阐述的各种层,任何所提到的结构性聚合物层(如108、116、130、1150、1148、1146、2146、2150、2148、2142)可以是聚对苯二甲酸乙二醇酯(PET)、聚萘二甲酸(PEN)、尼龙或其它结构性聚合物层,并且在一些方式中,可以为约0.5至约5密耳厚,而在其它方式中,约1至约3密耳厚。在其它方式中,这些层可以是非发泡的聚烯烃聚合物。聚合物支撑层可以从多个合适的非发泡材料中选取,其能够在相对薄的厚度上提供结构支撑。例如,该聚合物材料可以是单轴取向聚合物或双轴取向聚合物,例如单轴取向聚丙烯和双轴取向的聚丙烯。支撑层还可以是共聚物和/或吹塑薄膜层。在一种方式中,该支撑层可以只在横向方向定向。在一些方式中,这些轴向定向的聚合物可以具有的纵向方向的弹性模量在大于约2,000牛/毫米2。在其他情况下,该薄膜可具有的横向方向的弹性模量在约4,000牛/毫米2或更大。一些薄膜可以是双轴取向的,并有以上提到的两个纵向和横向弹性模量。
还可以有将各层粘结在一起的粘合剂层(图中未示出)。例如,薄的粘合剂层(未示出)也可以根据需要被用来将层固定在一起,以用于特定应用,并且可以是,例如,约0.2至约0.5密耳(或更小)粘合剂,诸如被涂覆的乙烯醋酸乙烯酯(EVA)、聚烯烃、2-组分聚氨酯、乙烯丙烯酸共聚物、可固化的两部分氨基甲酸乙酯粘合剂、环氧树脂粘合剂、乙烯甲基丙烯酸酯共聚物以及类似的粘结材料。
叠层体还可以包括聚合物泡沫层,例如层109、1148、1146、2148或2146。例如,聚合物泡沫可以是聚乙烯泡沫层。其它合适的聚合物泡沫材料包括聚丙烯或丙烯-乙烯共聚物。聚乙烯泡沫是优选的,因为其具有所需的对箔层的粘结性能和粘结强度。任何泡沫层的厚度都可以为至少约0.003英寸,更优选至少约0.005英寸,并且在一些方式中,约0.003至约0.010英寸。如果厚度过薄,感应密封过程的热会熔化泡沫。另外,所希望的粘结强度也可能无法实现。此外,如果泡沫太薄,它会提供较少的压缩,且通过感应加热获得的粘结会变得更不可靠。当泡沫的厚度为大于约0.010,或甚至0.008英寸时,益处开始停止,而且材料的成本和膨松会在感应粘结工艺的情形中产生问题。在一些形式中,聚合物泡沫层可具有约2000至约3500克/英寸的内部破裂强度。在一些方式中,泡沫聚合物层也可以具有小于0.6克/毫升的密度,在一些情况下,约0.4至小于约0.6克/毫升。在其他方式中,密度可为从约0.4克/毫升至约0.9克/毫升。在其它方式中,泡沫聚合物层可为约1至约5密耳厚。
拉片式密封部件还可以包括非发泡的热再分配或热分配层,其可以是层109、1148、1146、2148或2146。非发泡的热分配层可以是非泡沫热分配聚烯烃薄膜层。在一种方式中,该非发泡热分配聚烯烃薄膜层是聚烯烃材料的共混物,例如一个或多个高密度聚烯烃组分与一个或多个更低密度的聚烯烃组分组合的共混物。合适的聚合物包括但不限于,聚乙烯、聚丙烯、乙烯-丙烯共聚物、其共混物以及具有高级α-烯烃的共聚物或共混物。在一种方式中,该非发泡热分配聚烯烃薄膜层是一个或多个高密度聚烯烃材料的约50%到约70%的共混物,其余的是一个或多个低密度聚烯烃材料。共混物被选择以获得有效的密度,以提供对容器的热密封以及将衬垫以一整片从密封件分离。
在一种方式中,非发泡热分配聚烯烃层的有效密度可以是约0.96克/毫升至0.99克/毫升之间。高于或低于这个密度范围会获得不可接受的结果,因为该层提供了太多隔离或者不能有效地分配热量。通过另一种方式,非发泡热分配层是一种约50%至约70%高密度聚乙烯与低到中等密度聚乙烯组合的共混物,能有效地得到上述密度范围。
另外,非发泡热分配层的有效厚度被选择以实现与密度结合的这种性能。一个有效厚度的方式可为约2至约10密耳。在其它方式中,这样的层可以是约2至约5密耳厚,在其他方式中,约2至约4密耳厚,并且在另外的其它方式中,约2至约3密耳厚。此范围之外的厚度为不可接受的,因为该层不能提供足够的隔离,或不能根据需要有效地分配热量以获得衬垫分离和密封件粘结的双重性能特征。
用于最下层的可热密封层的合适的粘合剂、热熔粘合剂,或密封剂(如,层118、1132、2118、2132)可包括,但不限于,聚酯、聚烯烃、乙烯-乙酸乙烯酯、乙烯-丙烯酸共聚物、沙林树脂和其它合适的材料。在一种方式中,最下层的可热密封层可以是单层或多层结构的约0.2至约3密耳厚的这些材料。在一些方式中,热密封层被选择以具有与容器的成分相似的成分,和/或包括与容器的成分相同的聚合物类型。例如,如果容器包含聚乙烯,那么热密封层也将包含聚乙烯。如果容器包含聚丙烯,那么热密封层将包含聚丙烯。其他类似的材料的组合也是可能的。
在一种方式中,任何膜或箔层(如层114、1134、2114或2134)可以是被配置为提供感应加热和阻挡特性到密封件的一个或多个层。被构造以提供感应加热的一个层是能够在暴露于感应电流时,产生热量的任何层,其中在层中的涡电流产生热量。在一种方式中,该薄膜层或箔层可以是金属层,例如,铝箔、锡和类似物。在其它方式中,薄膜层可以是与感应加热层组合的聚合物层。薄膜层也可以是或包括大气阻挡层,其能够延缓气体和水分至少从密封容器外至内的迁移,并且在某些情况下,还同时提供感应加热。因此,薄膜层可以是被配置为提供这样的功能的一个或多个层。在一种方式中,箔或薄膜层为约0.3至约2密耳的金属箔,如铝箔,其能够提供感应加热,并作为大气屏障起作用。
粘结层或热活化粘结层(例如,110、1144、2144和3001)可以包括被热活化或加热来实现粘合特性的任何聚合物材料。在一种方式中,该热活化粘结层可以具有约0.9至约1.0克/毫升的密度和大约145°F至约155°F的峰值熔点。粘结层的熔融指数可为约20至约30克/10分钟(ASTM D1238)。合适的例子包括乙烯醋酸乙烯酯(EVA)、乙烯丙烯酸甲酯(EMA)、聚烯烃、2-组分聚氨酯、乙烯丙烯酸共聚物、可固化的两部分氨基甲酸乙酯粘合剂、环氧树脂粘合剂、乙烯甲基丙烯酸酯共聚物、它们的组合以及类似的粘结材料。
在一种方式中,热活化粘结层是EVA。在一般情况下,因为它的热粘结特性,EVA对于热活化的粘结层是有效的,使得其容易地粘结到层并且形成比上面提到的内部断裂强度更强到层的粘结。在一种方式中,该热活化粘结层可具有含量为约20%至约28%的乙酸乙烯酯,而剩余的单体是乙烯,以便实现粘结强度,并且,在一些情况下,实现内部断裂强度以提供本文中改进的密封件。低于20%的乙酸乙烯酯含量不足以形成本文描述的结实结构。如上所述,热活化粘结层可以相对于上叠层体的总厚度具有选定的厚度,以帮助实现密封的功能。如果当发泡聚合物层位于其上方时,热活化粘结层过厚,则难以达到满意的粘结,而且有太多量体积或质量的热活化粘结层,其易于在后来的感应或传导加热时从密封件中渗出。如果该热活化粘结层太薄,则对下叠层体的粘结强度不足,造成在移除密封件时拉片被从下叠层体上剥离。如果粘结层太薄,则拉片也不具有足够的内部强度以防止撕裂。在一种方式中,粘结层可以是约0.5至约2密耳厚,在其他方式中,约0.5至约1.5密耳,并且在其他方式中,约0.5至约1.0密耳。然而,根据需要,对于特定应用,厚度可以变化以实现期望的粘结和内部强度。
密封部件的各层经由热叠层工艺形成所描述的层的片材来被组装。也可以使用粘结剂涂层和/或挤出叠层。叠层期间,热量被施加到网状件,以活化在叠层体结构中的各种热活化层,以便形成密封部件。密封部件的最终叠层体片材可根据需要被切割成适当尺寸的盘或其他形状,以形成容器封闭组件或拉片式密封部件。冲切一般会切穿各分离层100,使得分离层形成抓握拉片。被切割的密封部件被插入盖子或其他封闭件,其反过来被施加到容器的颈部用以密封。螺盖可以拧到容器的敞开颈部上,从而夹住容器的敞开颈部和盖的顶部之间的密封部件。然后加热或感应电流或其他密封法被施加以密封形成容器的颈部的密封部的层的底部子组件。
应当理解的是,细节、材料和工艺的安排、叠层体、叠层体/基板组件,以及它们的组合在本文中为了解释本产品的特质和方法而描述和图示,本领域的技术人员可以做出的各种变化都在如所附权利要求所表达的具体化的产品和方法的原则和范围内。例如,叠层体和组装件可以根据需要为了特定应用而在所示的和所描述的叠层体中和各种层中包括其他层。如果需要的话,在图中未示出的粘合剂层也可以使用,以将各种层固定在一起。除非本文另有说明,所有的份数和百分数均以重量计。
Claims (26)
1.一种用于粘结至围绕容器开口的环边的拉片式密封部件,所述拉片式密封部件包括:
下部件,所述下部件至少包括用于粘结至容器环边的密封层;
上部件,所述上部件包括一个或多个层并且部分粘结至所述下部件,并且包括不粘结至所述下部件的所述上部件的自由部;
转折接合,所述转折接合由所述上部件和所述下部件之间的部分粘结形成,所述转折接合允许所述上部件的所述自由部从所述下部件枢转离开,以形成抓持拉片;
折叠片材,所述折叠片材具有第一折叠部、第二折叠部和死折,所述第一折叠部粘结至所述上部件的所述自由部,所述第二折叠部粘结至所述下部件在所述自由部下面的部分,所述死折与所述转折接合对齐,所述第一折叠部的内表面不粘结至面对的所述第二折叠部的内表面;及
在所述上部件和所述下部件之间的部分层,形成在所述上部件和所述下部件之间的部分粘结,其中,所述部分层的厚度与所述折叠片材被折叠时的厚度一致。
2.如权利要求1所述的拉片式密封部件,其中所述折叠片材是包括一个或多个聚合物层的聚合物薄膜。
3.如前述任一权利要求所述的拉片式密封部件,其中所述折叠片材是非管状的。
4.如权利要求3所述的拉片式密封部件,其中所述折叠片材包括内聚合物层和外聚合物层,所述外聚合物层是热活化聚合物,并形成所述第一折叠部与所述上部件的所述自由部之间的粘结,以及形成所述第二折叠部与所述下部件在所述自由部下面的所述部分之间的粘结。
5.如权利要求4所述的拉片式密封部件,其中所述内聚合物层是聚对苯二甲酸乙二醇酯,所述外聚合物层是以下各项中的一个:乙烯乙酸乙烯酯、乙烯丙烯酸甲酯、聚丙烯、聚乙烯、聚氨酯和它们的共聚物。
6.如权利要求4所述的拉片式密封部件,其中所述内聚合物层是具有熔点的聚合物,所述外聚合物层是具有比所述内聚合物层的所述熔点低的熔点的聚合物。
7.如权利要求5所述的拉片式密封部件,其中所述内聚合物层是具有熔点的聚合物,所述外聚合物层是具有比所述内聚合物层的所述熔点低的熔点的聚合物。
8.如权利要求4所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
9.如权利要求5所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
10.如权利要求6所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
11.如权利要求7所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
12.如权利要求1或2所述的拉片式密封部件,其中所述折叠片材包括内聚合物层和外聚合物层,所述外聚合物层是热活化聚合物,并形成所述第一折叠部与所述上部件的所述自由部之间的粘结,以及形成所述第二折叠部与所述下部件在所述自由部下面的所述部分之间的粘结。
13.如权利要求12所述的拉片式密封部件,其中所述内聚合物层是聚对苯二甲酸乙二醇酯,所述外聚合物层是以下各项中的一个:乙烯乙酸乙烯酯、乙烯丙烯酸甲酯、聚丙烯、聚乙烯、聚氨酯和它们的共聚物。
14.如权利要求12所述的拉片式密封部件,其中所述内聚合物层是具有熔点的聚合物,所述外聚合物层是具有比所述内聚合物层的所述熔点低的熔点的聚合物。
15.如权利要求13所述的拉片式密封部件,其中所述内聚合物层是具有熔点的聚合物,所述外聚合物层是具有比所述内聚合物层的所述熔点低的熔点的聚合物。
16.如权利要求12所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
17.如权利要求13所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
18.如权利要求14所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
19.如权利要求15所述的拉片式密封部件,其中所述内聚合物层或所述外聚合物层中的一个是发泡聚合物。
20.如权利要求1或2所述的拉片式密封部件,其中所述折叠片材包括多孔聚合物膜。
21.如权利要求1或2所述的拉片式密封部件,其中所述第一折叠部被热焊接到所述第二折叠部。
22.如权利要求1或2所述的拉片式密封部件,其中所述下部件包括以下各项中的一个或多个:箔层、聚合物支撑层、发泡聚合物层、非发泡热分配层、或它们的组合。
23.如权利要求1或2所述的拉片式密封部件,其中所述上部件包括以下各种中的一个或多个:箔层、聚合物支撑层、发泡聚合物层、非发泡热分配层、热粘结聚合物层、或它们的组合。
24.如权利要求1或2所述的拉片式密封部件,其中所述上部件的顶表面是粘结至衬垫的蜡。
25.如权利要求1所述的拉片式密封部件,其中所述折叠片材用圆柱形聚合物片材做成,其中所述圆柱形聚合物片材包括多个微孔,所述多个微孔的尺寸使得空气能够从所述圆柱形聚合物片材的内侧穿至所述圆柱形聚合物片材的外侧。
26.一种配置成形成如前述任一权利要求所述的拉片式密封部件的叠层体片材。
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-
2016
- 2016-03-03 EP EP20198176.8A patent/EP3786082B1/en active Active
- 2016-03-03 EP EP19206791.6A patent/EP3623312B1/en active Active
- 2016-03-03 ES ES16759486T patent/ES2773855T3/es active Active
- 2016-03-03 CN CN201680002581.XA patent/CN106687386B/zh active Active
- 2016-03-03 AU AU2016226216A patent/AU2016226216B2/en active Active
- 2016-03-03 MX MX2017011161A patent/MX2017011161A/es unknown
- 2016-03-03 US US15/554,240 patent/US10556732B2/en active Active
- 2016-03-03 CN CN201911077744.2A patent/CN110817113B/zh active Active
- 2016-03-03 WO PCT/US2016/020666 patent/WO2016141175A1/en active Application Filing
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EP3265397A4 (en) | 2018-10-31 |
ES2773855T3 (es) | 2020-07-15 |
CN106687386A (zh) | 2017-05-17 |
EP3265397A1 (en) | 2018-01-10 |
US10556732B2 (en) | 2020-02-11 |
EP3265397B1 (en) | 2020-01-15 |
CN110817113A (zh) | 2020-02-21 |
EP3786082A1 (en) | 2021-03-03 |
US11059644B2 (en) | 2021-07-13 |
MX2017011161A (es) | 2019-02-14 |
US20200140176A1 (en) | 2020-05-07 |
EP3623312A1 (en) | 2020-03-18 |
WO2016141175A1 (en) | 2016-09-09 |
CO2017009078A2 (es) | 2017-11-30 |
EP3623312B1 (en) | 2020-12-30 |
EP3786082B1 (en) | 2021-12-22 |
AU2016226216B2 (en) | 2020-09-24 |
KR20170127518A (ko) | 2017-11-21 |
AU2016226216A1 (en) | 2017-09-07 |
KR102638255B1 (ko) | 2024-02-19 |
CN106687386B (zh) | 2019-12-03 |
US20180079576A1 (en) | 2018-03-22 |
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