CN101166676A - 薄膜包装,特别是流动覆盖包装 - Google Patents
薄膜包装,特别是流动覆盖包装 Download PDFInfo
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Abstract
一种具有纵向密封接缝(13)和两个横向密封接缝(14)的流动覆盖包装(10),至少纵向密封接缝(13)与所述包装(10)的相应纵向边缘(15,16)间隔开,其中,在所述纵向密封接缝(13)和纵向边缘(15,16)之间的至少一点上,也就是在由所述纵向密封接缝(13)和所述纵向边缘(15,16)限定的包装(10)的纵向边缘带(17,18)上的至少一点上设置有用于指示所述包装(10)是否被开启(密封保证)的装置(19,20)。
Description
本发明涉及一种薄膜包装,尤其是具有纵向密封接缝和两个横向密封接缝的流动覆盖包装(flow wrap packaging),其中,至少纵向密封接缝与所述包装相应的纵向边缘间隔开。
这种包装通常用于固体物品的包装,但是也用于软的,尤其是可流动的物质。它们被包装在方形或矩形薄膜片中,因此形成了相对于包装边缘的纵向边缘和两个在所述边缘和包装边缘之间延伸的横向边缘。后者和所述纵向边缘被彼此密封以便形成一个纵向的和两个横向的密封接缝,所以所述物品被安全地包装并且不受外部环境的影响。所述横向密封接缝通常直接沿着横向边缘延伸,也就是说所述包装的横向边界,而所述纵向密封接缝与相应纵向边缘间隔开。因此可以相对方便地从纵向边缘一侧打开所述包装。这只需要借助于两个拇指或两个手指并且随后在拇指和手指之间有力地捏住每个边缘将两条纵向边缘带分离开,每个所述纵向边缘带由所述纵向密封接缝和所述纵向边缘限定并且它们彼此直接接触。然后可以将所述两个纵向边缘带撕开以便打开所述纵向密封接缝。为了方便两个纵向密封带的分离,其中一个纵向边缘带比另一个纵向边缘带略宽,因此其中一个纵向边缘带越过另一个纵向边缘带向外略微伸出,优选向外伸出约1至2mm。
然而,这种已知的包装的缺点是使用者不容易看到所述包装是否已经被自己或第三者打开过。这种情况尤其在所述包装为可重新密封的包装时,特别是至少部分纵向密封接缝,特别是纵向密封接缝和两个横向密封接缝,由彼此互相接触并且可被重新粘合数次的冷封粘合剂带形成的包装。这种包装很容易被打开和重新密封,而对于随后的购买者来说并不明显。
因此,本发明基于该问题生产了一种提供了对于第一次开启的可靠证据的包装。
通过权利要求1的特征解决了这个问题,从属权利要求中描述了其特定的结构细节和实施例。
因此本发明的主要特点是在纵向密封接缝和纵向边缘之间的至少一点处设置有用于指示所述包装是否已经被开启过的装置,也就是所谓的“密封保证”。应该理解,这种保质密封件也可以设置在横向密封接缝的区域中,尤其当它们也能够被重新密封的时候。
用于指示所述包装是否已经被开启过的装置的特别简单的实施例,尤其是从生产工艺的立场看也非常简单的装置,其特征在于,在所述两个纵向边缘带之一的内侧设置有所谓的粘合标签(环形,椭圆形,矩形或类似形状),所述粘合标签与在另一个或相对纵向边缘带内侧上的颜色标记结合,当粘合标签与颜色标记分离时,着色剂清晰可见地附着在粘合标签上。因此,如果两个纵向边缘带被打开时,这对于该包装的购买者来说将是清晰可见的。我们仅仅需要检查粘合标签上是否已经被染色。这种粘合标签最好不能够重新粘合。
当包装被打开时,用于标记所述粘合标签的着色剂最好直接应用在形成薄膜包装的薄膜上和/或应用到位于所述薄膜或层压薄膜的粘合剂侧的适合的层合薄膜上,例如,通过照相凹版印刷。
与在这里应用的冷封粘合剂相关,我们应该注意到所述冷封粘合剂最好包括丙烯酸基的材料,并且至少在纵向密封接缝区域,所述粘合剂能够重新粘合至少三次,尤其是直到10至15次,而闭合强度不受到明显的影响。
所述冷封粘合剂最好在水基苯乙烯-丙烯酸酯分散剂的基础上生产,这样,在每次闭合或重新粘合时,其至少具有50%-80%的初始闭合力。
根据本发明,所述冷封粘合剂的初始闭合力在3.2N/15mm至2.5N/15mm的范围内,优选在3.0N/15mm至2.65N/15mm的范围内,最优选在2.75N/15mm至2.85N/15mm的范围内。
在这样的初始闭合力的基础上,在密封后,通过其能够使包装牢固闭合的多次重新粘合以一种简单的方式方便地实现了。
根据本发明,所述冷封粘合剂的固体含量范围为40%-65%,优选45%-60%,特别优选50%-53%。所述冷封粘合剂在25摄氏度下的粘度为350cp-650cp,优选400cp-580cp,最优选480cp-520cp,所述粘度根据Brookfield ASTM D3236标准确定。
另外,所述冷封粘合剂的应用重量范围为3.8g/m2-5.2g/m2,优选4.2g/m2-4.8g/m2,特别优选4.35g/m2-4.55g/m2。
所述用于标记粘合标签的着色剂为水基的并且固体含量范围为28%-42%,优选32%-38%,特别优选33%-34.5%,所述着色剂在20摄氏度的粘度范围为75”±10”B6 cup,优选75”±5”B6 cup(根据Brookfield ASTM D3236标准对应于805cp±53.13cp)。
所述着色剂的应用干重范围为0.25g/m2-2.8g/m2,优选0.8g/m2-1.8g/m2,特别优选1.0g/m2-1.5g/m2。
当遵守上述参数时,根据本发明的借助于粘合标签和与之相关的颜色标记的密封保证可被生产,而不会有任何问题。因此,这种密封保证可以一种极为简单的方式生产,由于无论是上面限定的着色剂还是冷封粘合剂都适合于橡皮版印刷和/或照相凹版印刷,因此可以使用橡皮版印刷和/或照相凹版印刷所适用的很宽范围的印刷技术和特别选择。
与实际实施例一致,所采用的着色剂通过印刷装置被直接施加到薄膜的丙烯酸一侧,该薄膜为例如取向聚丙烯薄膜,所述薄膜和施加在那里的粘合剂之间的粘合力相对较小并且趋向于0N/15mm,但是仍然足够高以至于着色剂对于磨损和破坏具有足够的抵抗力并且牢固地保留在所述薄膜上,直到所述包装被粘合在一起,例如封闭。
随着所述着色剂应用到薄膜上,包含着色剂的薄膜与冷封粘合剂被套印在一起,所述薄膜和冷封粘合剂之间的粘合力大于位于冷封粘合剂下面的着色剂层与薄膜之间的粘合力。
密封保证或粘合标签的功能是,为了密封所述包装,该包装的涂有冷封粘合剂的纵向密封接缝被挤压在一起,这样两个冷封粘合剂层或一个冷封粘合剂层与薄膜层开始接触,由此所述包装通过四周的粘合力被封闭,即从包装边缘到包装边缘。
因此,所产生的层状结构如下:薄膜/冷封粘合剂=冷封粘合剂/着色剂/薄膜或者可选择的是薄膜=冷封粘合剂/着色剂/薄膜。所以“=”反映了用于密封所述薄膜包装的层状结构中的点,即两个纵向边缘带之间的粘合层。
由于在前所述的着色剂层与薄膜之间的粘合力比冷封粘合剂与薄膜之间的粘合力弱,因此,当所述密封被打开时,着色剂层粘附在粘合标签区域的粘合剂上并且至少部分被撕离或脱离所述薄膜,这样在包装被打开过后,所述粘合标签借助于着色剂被染色。所以,当包装被打开时,所述粘合标签区域的密封被破坏了,而不是与密封所述包装相反的步骤,其中两个冷封粘合剂层或一个冷封粘合剂层与薄膜相互接触,但是在由着色剂和薄膜之间的粘合形成的或限定的层状结构的最弱点处被破坏。
在这一点上应该提到,为了生产根据本发明的薄膜包装产品,所述薄膜可为标准的薄膜形式或者为薄膜层压件的形式。如果需要,所述薄膜层压件最好具有金属层并且最好为铝层压件的形式,其具有至少一个密封层和任意地,隔离层,例如二氧化硅,乙基乙烯醇(EVOH)或者取向聚烯烃,尤其是聚丙烯(OPP)。另外,取向聚烯烃最好为单向拉伸的。
作为用于指示所述包装是否已经被开启过的上述装置的替换,该装置可以由粘合点或密封点限定,所述密封点由至少在两个纵向边缘带之一上的撕开线界定,这样当所述包装被第一次开启时,相应界定的边缘带部分与密封点一起被清晰可见地分开了。在包装被第一次打开后,所述纵向边缘带就被清晰可见地破坏了。这样,使用者就被提供了与矿泉水瓶旋塞上的保质环一样的密封保证。
优选的是,多个用于指示所述包装是否已经被打开过的装置彼此间隔地设置在彼此接触的纵向边缘带区域,所述装置之间的间隔被如此设置以至于如果被打开,那么它们之间具有足够小的间隙从而不能够接近包装内部。
本发明的进一步的实施例将在从属权利要求中阐述。
下文将参考根据附图标记对详细细节进行说明的实施例对本发明进行描述。
图1以俯视图的方式说明了根据本发明的用于流动覆盖包装的矩形坯料,其中在侧边已经应用了用于形成纵向和横向密封接缝的冷封粘合剂带。
图2为由根据图1的胶坯片形成的包装的透视图,其一角被撕开。
图3说明了根据图1的不同的矩形胶坯片。
图4为粘合剂添加区域的薄膜、着色剂、冷封粘合剂的层状结构剖面示意图。
如在本申请开始已经提到的,流动覆盖包装10由方形或矩形(如根据图1和图3所示的)薄膜片12形成。根据图1,所述薄膜片12在一侧具有冷封的粘合剂。所述冷封粘合剂以矩形框11的形式被使用,其中两个相对的冷封粘合剂带14直接沿着包装的薄膜片12的相对边缘设置,另外两个相对的冷封粘合剂带13与包装薄膜片12的相应边缘15,16以不同的距离间隔开。这两个最后提及的边缘15,16形成了所述包装的纵向边缘,而所述两个第一次提及的边缘限定了所述包装的横向边缘。
因此,所述冷封粘合剂带13形成了所述包装10的纵向密封接缝,而冷封粘合剂带14限定了两个横向密封接缝。所述纵向密封接缝13与所述包装10的纵向边缘15,16间隔开,所述纵向边缘16比纵向边缘15稍微远离所述纵向密封接缝。因此,所述纵向边缘16超过纵向边缘15向外伸出,尤其是,大约为1.0mm至2.0mm。因此,所述两个纵向边缘和相应的纵向边缘带可以更容易地舒展开以便打开所述包装10。与纵向边缘15,16相关的所述纵向边缘带用附图标记17,18标记。
在所述纵向密封接缝13和所述纵向边缘15,16之间的至少一点处,也就是在由所述纵向密封接缝和所述纵向边缘限定的纵向边缘带17,18上的至少一点处,根据图1设置有一个用于指示所述包装10是否已经被打开的装置,图3中具有5个这样的装置,这些装置沿着纵向密封接缝彼此间隔设置,所述接缝不允许接近包装的内容物而不损害至少一个密封保证装置。在所述实施例中,这种装置由在两个纵向边缘带之一(这里指纵向边缘带17)的内侧上的不能重新粘合(冷封)的粘合标签19和,与之相关的,位于另一个或者相对的纵向边缘带18的内侧上的颜色标记20形成,其中,在粘合标签19从颜色标记20上分离时,着色剂清晰可见地附着在粘合标签19上(如图2所示)。当两个纵向边缘带17,18被展开时,使用者可以快速地识别粘合标签19上的着色剂,这将证明是否已经尝试过打开所述包装。只有当在粘合标签19点处的纵向边缘带17,18仍然彼此牢固地粘和在一起时,用户才能确切知道所述包装仍然没有被打开。然而,如果所述纵向边缘带17,18能够在整个长度上毫无困难地完全展开,那么用户就会在粘合标签19的区域中看到颜色标记,这是所述包装已经被打开过的标记,或者,在之前至少已经作出过试图打开所述包装的尝试。当然,这个特征只有当至少部分纵向密封接缝13由彼此接触并且能够重新粘合数次,也就是说能够多次重新密封的冷封粘合剂带形成时才有用。此外,所述密封接缝自身是质量的保证。当然,也就是说,具有无法重新密封的接缝的包装不需要第一次打开的保质密封件。
图4中显示了根据本发明的层状结构的排列,其中在粘合标签19区域,在粘合标签19的下面具有颜色标记20,所述标记依次直接应用到薄膜片12上。在粘合标签19旁边,冷封粘合剂带13直接设置在所述薄膜片12上。在这里应该指出,当粘合剂直接在薄膜片12上和颜色标记20上都应用相同的高度时,在密封所述包装时候,通过在粘合剂片的区域施加增大的压力使颜色标记20上部的高度略微增加,这样粘合标签19就牢固地粘接在颜色标记20上,因此当打开所述包装时,能够保证颜色标记20粘接在粘合标签19上。
可选择的是,同样能够通过粘着点或密封点来限定用于指示所述包装是否打开过的装置,所述密封点由至少在所述两个纵向边缘带之一上的撕开线界定,因此,当包装被第一次打开时,相应界定的边缘带部分和密封点被明显可见地分开了。在该实施例中,当所述包装被打开后,两个纵向边缘带中的一个被可见地破坏了。
在两个纵向边缘带17,18之间的区域,最好在它们的整个长度上设置多个指示所述包装被第一次开启的装置,所述装置彼此间隔设置,所述装置之间的间隔被如此设置以至于在它们之间不可能进入所述包装。当然,对于指示所述包装被第一次开启的装置来说,同样可以设置在横向密封接缝的区域。这主要依赖于包装的特殊形式以及纵向和横向密封接缝的结构。
由于对于本发明至关重要,所以本申请文件中公开的所有特征都已经被写在权利要求中,这些特征无论是单独的还是相互之间的结合都相对于现有技术具备新颖性。
附图标记:
10 流动覆盖包装
11 冷封粘合剂框
12 薄膜片
13 冷封粘合剂带(用于形成纵向密封接缝)
14 冷封粘合剂带(用于形成纵向密封接缝)
15 边缘(包装的纵向边缘)
16 边缘(包装的纵向边缘)
17 纵向边缘带
18 纵向边缘带
19 粘合标签(保质密封)
20 颜色标记
Claims (19)
1.一种选自由薄膜包装和流动覆盖薄膜包装组成的组中的包装,所述包装具有纵向密封接缝和两个横向密封接缝,至少所述纵向密封接缝与所述包装的相关纵向边缘间隔开,其中:
在所述纵向密封接缝和所述纵向边缘之间的至少一点上,也就是说在由所述纵向密封接缝和所述纵向边缘限定的包装的纵向边缘带上的至少一点上,设置有用于指示所述包装是否已被开启的装置。
2.根据权利要求1所述的包装,其特征在于,至少一部分所述纵向密封接缝可操作以再次粘接。
3.根据权利要求2所述的包装,其特征在于,可操作以再次粘接的所述部分由冷封粘合剂带形成,所述冷封粘合剂带彼此接触并且可操作以再次粘接多次。
4.根据权利要求1所述的包装,其特征在于,所述用于指示包装是否已被开启的装置由选自包括位于所述两个纵向边缘带之一的内侧上的不能重新粘接的粘合标签和不能重新粘接的冷封粘合标签的组中的标签和,与之相关的,位于另一个或者相对的纵向边缘带的内侧上的颜色标记形成,其中,当所述粘合标签与所述颜色标记分离时,着色剂可见地保留粘附在所述粘合标签上。
5.根据权利要求4所述的包装,其特征在于,所述着色剂施加于形成薄膜包装的薄膜和/或层合薄膜的粘合侧上。
6.根据权利要求5所述的包装,其特征在于,所述着色剂由凹版印刷来施加。
7.根据权利要求1所述的包装,其特征在于,所述包装包括方形或矩形薄膜片,在该薄膜片的一侧上施加有方形或矩形框架形式的冷封粘合剂,其中两个相对的冷封粘合剂带直接沿着所述包装薄膜片的相应边缘设置,另外两个相对的冷封粘合剂带以一定间隔与包装薄膜片的相应边缘间隔开,所述一定间隔选自包括相同间隔和不同间隔的组。
8.根据权利要求1所述的包装,其特征在于,所述用于指示包装是否已被开启的装置由粘接点或密封点限定,所述密封点由至少在所述两个纵向边缘带之一上的撕开线界定,这样当所述包装被第一次开启时,相应的界定边缘带部分与密封点一起被可视地分离。
9.根据权利要求3所述的包装,其特征在于,所述冷封粘合剂为至少在纵向密封接缝区域以水基苯乙烯-丙烯酸酯分散剂为基础形成的粘合剂,所述冷封粘合剂能够被粘接多次,而闭合强度不会受到明显的影响(也就是说,仍然具有至少50%-80%的初始闭合力),所述多次选自包括至少3次,一直到10至15次的组中。
10.根据权利要求3所述的包装,其特征在于,所述冷封粘合剂的初始闭合力位于选自包括下列范围的组中的范围中:3.2N/15mm至2.5N/15mm,3.0N/15mm至2.65N/15mm,以及2.75N/15mm至2.85N/15mm。
11.根据权利要求3所述的包装,其特征在于,所述冷封粘合剂具有选自包括下列范围的组中的固体含量:40%-65%,45%-60%,以及50%-53%,其粘度(在25摄氏度)范围选自包括下列范围的组中:350cp-650cp,400cp-580cp,480cp-520cp,根据BrookfieldASTM D3236标准。
12.根据权利要求3所述的包装,其特征在于,所述冷封粘合剂的使用重量范围选自包括下列范围的组中:3.8g/m2-5.2g/m2,4.2g/m2-4.8g/m2,以及4.35g/m2-4.55g/m2。
13.根据权利要求3所述的包装,其特征在于,所述着色剂和/或冷封粘合剂适于胶板和/或凹版印刷。
14.根据权利要求4所述的包装,其特征在于,所述着色剂具有选自包括下列范围的组中的固体含量:28%-42%,32%-38%,以及33%-34.5%,着色剂的粘度(在20摄氏度)范围选自包括下列范围的组中:75”±10”B6 cup,优选75”±5”B6 cup(对应于根据Brookfield ASTM D3236标准的805cp±53.13cp)。
15.根据权利要求4所述的包装,其特征在于,所述着色剂为水基墨。
16.根据权利要求4所述的包装,其特征在于,所述着色剂的应用干重范围选自包括下列范围的组中:0.25g/m2-2.8g/m2,0.8g/m2-1.8g/m2,以及1.0g/m2-1.5g/m2。
17.根据权利要求4所述的包装,其特征在于,所述着色剂与薄膜的粘合力小于所述着色剂与所述冷封粘合剂的粘合力,所述着色剂与所述薄膜的粘合强度趋向于0N/15mm。
18.根据权利要求4所述的包装,其特征在于,所述包装如此设置以至于当包装被开启时,在粘合标签区域内冷封粘合剂/着色剂的结合被破坏,并且所述包装的其余区域中冷封粘合剂/冷封粘合剂的结合被破坏。
19.根据权利要求1所述的包装,其特征在于,所述薄膜包括一种或多种选自包括下列材料的组中的材料:层压材料,铝层压材料,至少一个密封层,至少一个隔离层,二氧化硅,乙基乙烯醇(EVOH),取向聚烯烃,取向聚丙烯(OPP),单向拉伸的聚丙烯,和至少一个金属箔。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2005/004118 WO2006111177A1 (en) | 2005-04-18 | 2005-04-18 | Film packaging having tamper-evident means |
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| CN101166676A true CN101166676A (zh) | 2008-04-23 |
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| US (2) | US8240546B2 (zh) |
| EP (1) | EP1871682B1 (zh) |
| CN (1) | CN101166676A (zh) |
| DE (1) | DE202004021343U1 (zh) |
| WO (1) | WO2006111177A1 (zh) |
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- 2005-04-18 WO PCT/EP2005/004118 patent/WO2006111177A1/en not_active Ceased
- 2005-04-18 CN CNA2005800495183A patent/CN101166676A/zh active Pending
- 2005-04-18 US US11/911,812 patent/US8240546B2/en not_active Expired - Fee Related
- 2005-04-18 EP EP05742845A patent/EP1871682B1/en not_active Expired - Lifetime
-
2012
- 2012-04-30 US US13/460,658 patent/US20120211551A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105026275A (zh) * | 2013-03-15 | 2015-11-04 | 洲际大品牌有限责任公司 | 具有视觉指示的粘合性可再闭合紧固件 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120211551A1 (en) | 2012-08-23 |
| US8240546B2 (en) | 2012-08-14 |
| US20080203141A1 (en) | 2008-08-28 |
| EP1871682B1 (en) | 2012-09-12 |
| EP1871682A1 (en) | 2008-01-02 |
| WO2006111177A1 (en) | 2006-10-26 |
| DE202004021343U1 (de) | 2007-10-25 |
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Application publication date: 20080423 |