CN102015284A - 用于压出式泡罩包装的挤出包覆的罩箔 - Google Patents
用于压出式泡罩包装的挤出包覆的罩箔 Download PDFInfo
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- CN102015284A CN102015284A CN2008801288517A CN200880128851A CN102015284A CN 102015284 A CN102015284 A CN 102015284A CN 2008801288517 A CN2008801288517 A CN 2008801288517A CN 200880128851 A CN200880128851 A CN 200880128851A CN 102015284 A CN102015284 A CN 102015284A
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Abstract
一种用于泡罩包装,尤其适合用于压出式药物和食品泡罩包装的挤出包覆的罩箔。罩箔包括箔层,箔层上挤出包覆了一个或多个粘结层和一个或多个密封剂层,以使得罩箔具有压出能力,所述一个或多个粘结层和一个或多个密封剂层中的一种或二种包含混合其中的脆化剂。罩箔的所述压出能力的特征是约10psi至约30psi的Mullen脆裂强度及约30克力至约100克力的MD撕裂强度。
Description
发明领域
本发明涉及具有罩箔(lidding foil)的包装。本发明特别用于压出式(push through)泡罩包装,并涉及可用于这种包装的挤出包覆的罩箔。
发明背景
“泡罩包装”是用于具有通常被称作“罩膜”的底部的包装的普通术语,其中形成多个凹部(例如,通过真空形成或压力形成),其中各个产品块(如,可消耗片剂或丸剂)被放置并保持其中。覆盖层,通常被称作“罩箔”,被放置罩膜上,并密封于罩膜每个凹部周边周围上。
主要有三种不同类型的泡罩包装:压出型、剥压型(peel-push)和锁型,其与消费者打算如何从密封包装内的它相应凹部取出消耗品有关。在泡罩包装的“压出”型中,消费者必须使用手指推向位于凹部位置的可延展罩膜并继续推压,直至凹部中的消耗品被压向并冲破覆盖的罩箔。在泡罩包装的“剥压”型中,消费者必须首先剥离两层罩块物(lid stock)的上层以暴露下层,并之后推向位于凹部位置的可延展罩膜并继续推压,直至凹部中的消耗品压向并冲破罩箔的下层。由于额外的罩箔层,“剥压”型包装被认为比严格的压出型对儿童更安全。在泡罩包装的“锁型”中,消费者只能通过使用如剪子、刀、指甲等工具破坏罩物质,获得凹部内容物。本发明主要涉及压出式或剥压式泡罩包装,虽然应注意,压出式被认为是剥压包装的完整部分。泡罩包装的压出型是用于丸剂或片剂形式的消耗品如口香糖或药物中最常见的包装类型。
目前,用使用凹版包覆工艺应用热封漆的罩箔(通常是铝箔)制造压出式泡罩包装。在凹版包覆工艺中,将漆粘合剂(例如,乙烯丙烯酸漆)溶于溶剂中并应用于以微窝或“隔室”方式刻纹的钢滚轴。当钢滚轴旋转时,表面的隔室通过穿过漆浴或通过把漆直接应用于钢滚轴而获得漆。一卷铝箔滚过旋转的钢滚轴和橡胶滚轴之间的箔片,借此薄层漆由钢滚轴转移至箔。因此,凹版包覆方法的使用允许将相对薄的漆层应用于罩箔。因此,这种工艺在压出式泡罩包装的罩箔上的使用已经是许多年来工业的标准,如果箔片和/或漆层太厚,消费者将不能轻易推动并完整地打开罩箔。
在挤出包覆工艺中,将粘合剂以应用于连续移动铝箔的熔化的聚合物帘的形式挤压通过模具。如果挤压太薄,帘内的中断可导致空隙,该空隙可导致包装密封中的裂口。目前,可剥离的罩块物(例如,如单独使用的具有剥离罩箔的食物容器中所使用的那样)的生产通常使用挤出包覆工艺、挤出层压工艺或凹版包覆工艺制造。挤出包覆/层压使用与凹版包覆工艺中所使用的不同的粘合剂,而且罩箔的剥离型足够地厚以防止打开容器前盖的不慎刺破。因此密封剂的较厚的层(当使用挤出包覆工艺时得到的层与凹版包覆相比)可用于剥离罩箔以确保完整密封,但不足以用于压出式泡罩包装应用。
在目前的压出式泡罩包装中,罩膜通常由聚合材料,例如聚氯乙烯(PVC)、聚二氯乙烯(PVdC)、PVC/PVdC组合、PVC/PCTFE组合或聚苯乙烯(PS)形成。在包装过程期间,将消耗品放置于罩膜中的它们各自的凹部中并将罩箔放置其上。然后应用热压密封罩箔到罩膜每个凹部周边的周围,藉此密封消耗品于包装中。
目前用于包装的罩膜的聚合物既不产生对湿气和空气的完全屏障,而且/还它们可能含有经受喷霜并可以污染消耗品的增塑剂。不足的屏障性质允许湿气和空气随时间推移渗入包装中,这缩短包装保质期。而且,由添加的喷霜对消耗品的污染可能对人健康是有害的。一些州,例如California,已经认识到PVC在消耗品的包装中的潜在地有害效应并正在考虑立法禁止PVC在食品和药品包装中的使用。因此,目前在制药工业中有如下趋势:由有更好湿气和空气屏障性能并比目前使用的聚合物罩膜更不活泼的材料制造的罩膜的使用。由Honeywell以商标Aclar提供的聚三氟氯乙烯(PCTFE)是具有这些期望性质的材料的一个实例。可从Topas AdvancedPolymers得到的环烯共聚物(COC)代表另一类类似地适当材料。
不幸地是,对于压出型罩箔,目前用于压出式泡罩罩箔的热封漆存在有效地直接地粘合至PCTFE(Aclar)、COC和具有以上有益性能的其它类似材料的困难。照此,当制造压出式泡罩包装时,工业中已实践层压更有益的PCTFE(Aclar)、COC等至益处较少(且更廉价)的PVC或一些其它聚合物,例如聚丙烯(PP)、高密度聚乙烯(HDPE)、线性低密度聚乙烯(LLDPE),及聚苯乙烯(PS),例如以形成罩膜。然后,一个目前的工业制造方法采用用热封漆的常规制造的压出式罩箔,并将它密封到热封漆能够有效粘合上的罩膜的PVC侧。这个过程意味着罩膜的PVC侧必须面向罩箔并因此与消耗品接触。虽然这种实践提供PCTFE(Aclar)、COC等的屏障性质的益处,但是由于PVC层接触包装中的消耗品,所以添加的喷霜的可能性是仍然存在的。因此,直接地密封压出式罩箔至PCTFE(Aclar)、COC等或类似有益材料的能力将不仅提供改进的屏障,也提供惰性材料与消耗品的接触。
可用于剥离罩块物的密封剂材料在美国专利申请序列号2005/0159549、2005/0249903和2006/00104022中描述,其公开内容以引用方式并入本文,这样的材料包括主要由以下组成的聚合物组合物:约10重量%至约80重量%的至少一种乙烯/烷基(甲基)丙烯酸酯/烷基酯共聚物、约5重量%至约60重量%的至少一种聚烯烃、0至约35重量%的至少一种增粘树脂(tackifying resin)、及0至约35重量%的填充物,例如滑石。
引用的专利申请中描述的密封剂材料宣称可用于制药工业的用于丸剂、片剂、胶囊及类似物的形式的药物的使用者友好的泡罩包装中,而且也可用于非药物如毒物、催化剂、清洁组合物、电池和其它产品。它们还可以被用于密封盛有诸如酸乳、布丁、奶油冻、明胶、果酱、软干酪和奶酪酱、肉、冷冻或冷藏餐、及干品食物例如面条和点心的产品的带盖容器。多种包装应用中采用的描述的密封剂材料也宣称提供良好的可被轻易剥开的热封。
其公开内容以引用方式并入本文的美国专利第4,211,326号描述包含金属箔以及以提供热成型袋的薄片的压出式泡罩包装,所述热成型袋在热成型前,包含具有聚氯乙烯(PVC)的外层和液压滚轴的、部分定向的聚合材料(例如,高密度聚乙烯(HDPE))的中间层的层压物结构。
其公开内容以引用方式并入本文的美国专利申请序列号2007/0224379描述用于剥压泡罩包装的对儿童安全的可剥开的药物泡罩罩块物,其包含白色聚酯的第一层、粘合剂的第二层、箔的第三层及热密封剂例如乙烯基丙烯酸的涂层的第四层。
其公开内容以引用方式并入本文的美国专利申请序列号2002/0193031描述用于包含金属箔的泡罩和小袋(pouches)的层压物,所述金属箔具有已经通过聚合基料的外表面直接热封于聚合基料表面的未包覆表面,其中所述外表面包含EVA共聚物及在室温脆化共聚物的添加剂的共混物。聚合基料可以是包括聚烯烃核和可以是聚三氟氯乙烯的第二外表面的层压物。宣称所述层压物可用于生产压穿(press-through)包装,此处当推挤片剂穿过包装时其不会剥开,并且也可用于生产小袋,此处会剥开。
其公开内容以引用方式并入本文的美国专利申请序列号2005/0058793描述共挤出多层热密封剂结构,其包含热塑性聚合材料的第一层、低密度聚乙烯的第二层及用作热密封剂层的单个位置催化的(site catalyzed)聚乙烯的第三层,所述热密封剂结构被层压至诸如铝箔的基材。
其公开内容以引用方式并入本文的美国专利第7,316,317号描述包含聚合基质薄片(例如PVC)和密封基料的包装,所述聚合基质薄片含有凹部并且所述密封基料包括粘合于聚合物基料(如,聚对苯二甲酸乙二酯(PET))的金属箔。密封基料具有足够的强度以阻止凹部中包装的物品被施加于凹部的压力推出。基础基料被密封到密封基料处的包装部分包括允许将包装物品挤推穿过密封基料的虚线。
其公开内容以引用方式并入本文的美国专利第2006/0199022号描述的泡罩包,其包括由在暴露于水时可被软化的粘合剂粘合于透水层的金属箔的层压物。粘合剂被水软化,藉此允许透水层从箔的移走后,才可将包装的物品挤推穿过箔。
虽然以上专利和申请描述用于泡罩包装的多种罩箔、罩膜及密封剂,但工业及以现有专利公开都并未曾提供用于压出式泡罩包装的挤出包覆的罩箔。而且,现有技术未能公开或教导用于压出式泡罩包装的可直接密封于具有提高的屏障及惰性性能的PCTFE(Aclar)、COC或类似地有益材料的挤出包覆的罩箔。
发明概述
本发明通过提供用于泡罩包装尤其适合于压出式药物和食物泡罩包装的挤出包覆的罩箔成功处理现有技术的以上不足。罩箔包括箔层,箔层上挤出包覆了一个或多个粘结层和一个或多个密封剂层,以使得罩箔具有压出式能力,所述一个或多个粘结层和一个或多个密封剂层中的一种或二种包含混合其中的脆化剂。罩箔的压出式能力的特征是约10psi至约30psi的Mullen脆裂强度及约30克力至约100克力的MD撕裂强度。本发明的罩箔可被热封于聚合物底部罩膜,以形成压出式泡罩包,虽然罩箔当然可以用于期望的泡罩包装的其它类型(例如剥压型或锁型)中。
附图简述
图1为现有技术热封涂漆的罩箔的示意图(结构类型1);
图2为含有现有技术密封剂树脂(C)的现有技术挤出包覆的罩箔的示意图(结构类型2);
图3为含有具有本发明脆化剂(I)的密封剂树脂的挤出包覆的罩箔的示意图(结构类型3);
图4为含有本发明密封剂树脂(I)的挤出包覆的罩箔的示意图,其中添加的脆化剂仅掺入密封剂层的一部分(结构类型4);
图5为Mullen脆裂试验后三个箔罩样品(G、H和I)的照片;
图6A-H为描绘样品G、H、I、J、K及L的落镖穿孔试验(dart puncture)的结果的曲线;
图8描绘包括密封于底部罩膜的本发明罩箔的泡罩包;以及
图9为根据本发明的实施方案的泡罩包装的照片。
发明详述
本发明提供尤其适合用于压出型药物和食物泡罩包装的罩箔,尽管预想所述罩箔可用于其它包装应用。
在一个实施方案中,罩箔包含铝箔、挤出包覆于铝箔的粘结层及挤出包覆于粘结层的密封剂层。箔具有约20μm至约25μm的厚度并可以是软回火的(即退火的)或硬回火的(即未退火的)。粘结层和密封剂层同时或相继挤出包覆于铝箔。脆化剂以按重量计约5%至约50%的量并更优选按重量计约10%至约30%的量混合于粘结层和密封剂层中的一种或两种。脆化剂优选地为矿物并且可以是例如碳酸钙、硫酸钙、玻璃纤维、高岭土、云母、硅石、滑石及硅灰石中的一种或多种。脆化剂可均匀地或不均匀地分布于粘结层和密封剂层中的一种或两种。例如,脆化剂可在密封剂层内不均匀地分布,在靠近粘结层的密封剂层中具有较高浓度。
在优选的实施方案中,粘结层被挤出包覆为每令约2磅至约5磅的包覆重量(coatweight),并且密封剂层被挤出包覆为每令约4磅至约10磅的包覆重量。
所得到的罩箔的特征为约10psi至约30psi的Mullen脆裂强度及约30克力至约100克力的MD撕裂强度。
粘结层可以是选自由以下组成的组的聚合物:
a)聚乙烯;
b)乙烯酸共聚物;
c)乙二醇二乙酸酯共聚物;
d)乙烯丙烯酸酯共聚物
e)乙烯酐共聚物(ethylene anhydride copolymer)
f)改性的乙烯丙烯酸酯共聚物;
g)离聚物;
h)聚丙烯;
i)酸酐接枝聚丙烯;以及
j)a至i中两种或更多种的混合物。
密封剂层可以是选自由以下组成的组的聚烯烃:
a)聚乙烯;
b)聚丙烯;
c)乙烯丙烯酸酯共聚物;
d)乙二醇二乙酸酯共聚物;
e)改性的乙烯丙烯酸酯共聚物;
f)改性的乙二醇二乙酸酯共聚物;
g)离聚物;以及
h)a至g中两种或更多种的混合物。
图1描绘包括施用于铝箔的热封漆薄层的现有技术罩箔结构(结构型1)。
图2描绘期望用于剥离式的盖(例如,如酸乳、果酱、汁、布丁……的独立使用包装所使用的)的现有技术可模切的罩箔结构(结构型2),其包括施用于铝箔的粘结树脂和密封剂树脂的相对较厚的层。
图3描绘根据本发明的压出式罩箔结构(结构型3),所述罩箔结构包括明显比现有技术结构的粘结层和密封剂层薄的粘结层和密封剂层,并且密封剂层含有脆化剂。
图4描绘根据本发明的压出式罩箔结构(结构型4),其中密封剂层的邻近粘结层的部分含有较高脆化剂浓度。
图1-4中描绘的印刷底漆(print primer)层可用于促进墨水与铝箔外表面的粘附。
按下述制备与根据本发明的罩箔比较的现有技术罩箔的样品:
表1-样品A至N的罩箔描述:
Appeel20D828,可从DuPont获得,用于样品H、I及K-N的密封剂层中。
防结块母料10012-089(Antiblock masterbatch 10012-089),可从Colortech Inc.获得,被用于样品L-N的密封剂层中。
样品A-F使用具有37μm的厚度的箔,该厚度对于压出式能力来说太厚。但是,测试仅为了阐述脆化剂对机械性能的影响,如下表2中所示。
表2
测试条件 | 样品A | 样品B | 样品C | 样品D | 样品E | 样品F |
箔厚度(μm) | 37 | 37 | 37 | 37 | 37 | 37 |
粘结层和密封剂层包覆重量(lb/令) | 3.25 | 9.2 | 14.2 | 9.2 | 14.2 | 18 |
挤出包覆组合物中的脆化剂 | 不可用 | 无 | 无 | 无 | 无 | 有 |
Mullen脆裂强度(psi) | 42.13 | 50.33 | 50.83 | 48.17 | 50.50 | 46.67 |
MD撕裂强度(克力) | 32.9 | 111.3 | 135.4 | 123.5 | 166.9 | 58.5 |
如所见,样品F说明尽管具有较厚的粘结包覆重量和密封剂包覆重量,但是为增加挤出包覆的罩箔的脆度来使其更适合用于压出式泡罩包装应用,脆化剂的使用是重要的。脆化剂可经由使用矿物负载的母料加入制品中,或原位地加入所选密封剂树脂的组合物中。充足的脆化剂含量是按重量计密封剂层组合物的5%至50%之间,并优选10%和30%之间。
以下表3为与25μm软回火的箔关于机械性能的比较。
表3:
测定条件 | 样品G | 样品H | 样品I |
箔厚度(μm) | 25 | 25 | 25 |
回火箔类型 | 软(“’O”) | 软(“O”) | 软(“O”) |
粘结层和密封剂层包覆重量(lb/令) | 3.25 | 15.6 | 9 |
挤出包覆组合物中的脆化剂 | 不可用 | 有 | 有 |
Mullen脆裂强度(psi) | 25.67 | 16.50 | 13.33 |
MD撕裂强度(克力) | 16.7 | 132.4 | 64.2 |
热封涂漆的结构(样品G)显示出比挤出包覆结构稍高的Mullen脆裂强度但更低的撕裂强度。然而,如图5中所示,热封涂漆的罩箔(样品G)在Mullen脆裂测定中显示比挤出包覆结构H和I更脆的断裂模式(即,它的延性更低)。因此,人们可假设用于压出式泡罩包装的良好罩箔将是不显示出太高穿孔强度或脆裂强度并伴有可能的最低撕裂强度的结构。因此,改良的挤出包覆结构型3(样品I)显示这些改进的特性,因为撕裂强度和脆裂强度显著性低于常规的挤出包覆结构(样品H)。
如图5中所示,具有降低的树脂包覆重量的样品I显示出比常规的挤出包覆的结构样品H更脆的断裂模式。如在样品G的常规热涂漆的结构中所见,泡罩包装应用优选较脆的断裂模式。
为全面地理解箔断裂机理,实施额外的罩箔穿孔试验。以5英寸/分钟穿孔速度实施对样品G、H和I的三个样品的球落镖穿孔试验(Spherical dart puncture test),并且把图示结果显示于图6A-C中。图6D为这三个样品的比较图。能量对应于功,即力乘位移,或对应于曲线下的面积。总能量与峰值能量越近,所测定的结构就越脆。样品G、H和I的峰值能量及总能量在下述表4中阐述。
表4:
结构 | 峰值能量(lb.in) | 总能量(lb.in) |
G | 1.542 | 1.745 |
H | 0.932 | 2.107 |
I | 0.712 | 1.293 |
与Mullen脆裂测试相反,落镖穿孔试验不仅提供破坏整个罩箔结构的峰值能量,也提供破坏整个罩箔结构的总能量。Mullen脆裂强度与峰值能量相关性良好。然而,事实上,总能量代表了更加容易地破裂整个罩箔结构,即模拟物质由泡罩包装内的压出和释放。因此,尽管样品I更易延展,但样品I比常规热封漆罩箔需要较少的能量来破坏结构。这是完全未预期的结果,而且如图9中所示,这种特性是使这种结构变得适合用于压出式泡罩应用的原因。相反,样品H由于当压出式时过度的可塑延展性(意味着它太易延展)而不足以用于压出式应用。
至于罩箔对罩膜材料的可密封性,作为参考,泡罩包装应用需要的通常的最小密封力为大约2.0lbs/in。但是,2.5lbs/in以上的密封力是目前优选的,以确保整体包装的良好的不透性和完整性。
本发明的改进的挤出包覆的罩箔的中使用的来自Dupont的Appeel20D828(参考上表1),是在其组合物中原位含有滑石的改性的乙烯丙烯酸酯共聚物。这种树脂在绝大多数聚合材料(包括,例如,PCTFE(Aclar))上提供特别良好的密封性能。
表5提供了样品I(结构型3)在几个温度下对含有多个外层的基于COC的罩膜的密封结果,
表5:
*40psi下密封0.7秒的1″带
如由表5中的数据所示,无论罩膜表层的聚合的性质或密封温度如何,均观察到样品I的优良的密封性。
因此,本发明的挤出包覆的结构不仅足以用于压出式泡罩包装应用,而且与热封涂漆的结构相比,由于本发明的挤出包覆的结构密封于由诸如PVC、PVdC、PS、PCTFE(Aclar)、HDPE、LLDPE、LDPE、PP、PETG、SBC或甚至COC制成的典型商品罩膜的绝大多数,也可表现极其普遍的密封特性。
下述为与20μm硬回火箔关于机械性能的另一个比较表。
表6:
额外的脆化剂掺入样品L、M和N的密封剂层(或密封剂层的一部分)中与样品K相比导致Mullen脆裂强度的极少量增加,并且对撕裂强度无可评估的影响。因此合理地推论出掺入密封剂层(或密封剂层的一部分)的组合物中的额外的矿物的脆化效应到达平台期,但对最终使用的泡罩包装应用未必有害,并且可看作本发明用于提高密封性能的另一个实施方案。
图6E-G显示样品J、K和L的三个样品的图,其中它们的峰值能量和总能量在下述表7中提供。图6H为这三个样品的比较图。
表7:
结构 | 峰值能量(lb.in) | 总能量(lb.in) |
J | 0.704 | 0.724 |
K | 0.411 | 0.45 |
L | 0.46 | 0.494 |
如样品J、K和L中的数据,该数据再次显示本发明的创新的挤出包覆的罩箔比常规热封涂漆的罩箔更易于压出的意外结果。实施额外的试验,以用样品I罩箔和PVC/PCTFE(Aclar)罩膜在Ulhmann机器上制造压出式泡罩包装以评价它的加工性及它的丸剂释放的容易性。在不同密封温度下制备十腔(ten-cavity)泡罩包。图8显示填充smarties的总体泡罩包的照片。
在泡罩包上直接测试样品I的密封性能。图7显示创新的结构样品I在PCTFE(Aclar)/PVC罩膜上的密封曲线的图。数据再次显示样品I在PCTFE(Aclar)罩膜上优良的密封能力。如图7中所示,密封温度窗(temperature window)是非常宽的。当用于基于COC的罩膜时,最优密封温度将在160-180℃的范围内。在这个加工窗(processing window)中,密封力为约550-600g/0.375″,其相当于约3.25lbf/in。
之后将样品泡罩包呈送至漏出检测,其包括在着色水中,15″Hg真空下浸没泡罩包3分钟。在由120℃至190℃变化的任何密封温度下完全未观察到漏出。
丸剂从它各自的泡罩腔中的释放非常良好。与诸如样品H中较重的包覆重量不同,在样品I的丸剂的释放过程期间中无密封剂层伸长发生。而且如图9中描绘,尽管样品I与热封漆相比有较重的包覆重量,样品I释放的容易性与热封涂漆的罩箔产品十分相近。
因而,本发明提供创新性的适合用于压出式泡罩包装应用的挤出包覆的罩箔。进一步的益处是本发明的罩箔普遍密封于绝大多数罩膜,包括由PCTFE(Aclar)或COC制得的那些。当然,该技术平台不仅可应用于压出式泡罩包装,而且也可用于其它具有罩箔的包装,诸如剥压型及需要切断的锁型。
虽然已经通过参照各种具体的实施方案描述了本发明,但应理解,在所描述的创新的概念的精神和范围内可做很多改良。因此,期望本发明不限于所描述的实施方案,但将具有由下列权利要求书的语言所限定的全部范围。
权利要求书(按照条约第19条的修改)
1.一种压出式泡罩包装,其包含:
a.罩箔,其包含:
i.铝箔;以及
ii.挤出包覆于所述铝箔的包含乙烯酸共聚物的一个或多个粘结层和挤出包覆于所述粘结层的包含改性的乙烯丙烯酸酯共聚物的一个或多个密封剂层,所述粘结层和所述密封剂层中的一种或二种具有混合其中的按重量计约5%至约50%的量的脆化剂;
其中所述罩箔的特征是约50kPa至约250kPa的Mullen脆裂强度及约2.5N至约1.0N的MD撕裂强度。
b.聚合性泡罩膜,
其中所述罩箔被热封于所述泡罩膜,以形成容纳物质的所述压出式泡罩包装,所述物质可通过将物质推向所述罩箔并破开所述罩箔而从所述包装取回。
2.如权利要求1所述的罩箔,其中所述脆化剂被以按重量计约10%至约30%的量混合于所述粘结层和所述密封剂层中的一种或二种中。
3.如权利要求1所述的罩箔,其中所述脆化剂是矿物。
4.如权利要求3所述的罩箔,其中所述脆化剂是以下中的一种或多种:
a)碳酸钙;
b)硫酸钙;
c)玻璃纤维;
d)高岭土;
e)云母;
f)硅石
g)滑石
h)硅灰石;以及
i)a至h中两种或更多种的混合物。
5.如权利要求1所述的罩箔,其中所述脆化剂在所述密封剂层内均匀地分布。
6.如权利要求1所述的罩箔,其中所述脆化剂在所述密封剂层内不均匀地分布,所述脆化剂在所述密封剂层的邻近所述粘结层的部分内浓度较高。
7.如权利要求1所述的罩箔,其中所述铝箔具有约20μm至约25μm的厚度。
8.如权利要求1所述的罩箔,其中所述铝箔是硬回火的(未退火的)。
9.如权利要求1所述的罩箔,其中所述铝箔是软回火的(退火的)。
10.如权利要求1所述的罩箔,其中所述一个或多个粘结层以约3g/m2至约8g/m2的量包覆于所述箔上,并且所述一个或多个密封剂层以约6g/m2至16g/m2的量包覆于所述粘结层上。
11.一种压出式泡罩包装,其包含:
a.罩箔,其包含:
i.铝箔;以及
ii.挤出包覆于所述铝箔的包含乙烯酸共聚物的一个或多个粘结层和挤出包覆于所述粘结层的包含改性的乙烯丙烯酸酯共聚物的一个或多个密封剂层,所述粘结层和所述密封剂层中的一种或二种具有混合其中的按重量计约5%至约50%的量的脆化剂;
其中所述粘结层被以约3g/m2至约8g/m2的包覆重量挤出包覆,并且所述密封剂层被以约6g/m2至约16g/m2的包覆重量挤出包覆。
b.聚合性泡罩膜,
其中所述罩箔被热封于所述泡罩膜,以形成容纳物质的所述压出式泡罩包装,所述物质可通过将物质推向所述罩箔并破开所述罩箔而从所述包装取回。
12.如权利要求11所述的罩箔,其中所述罩箔的特征是约50kPa至约250kPa的Mullen脆裂强度及约0.25N至约1.0N的MD撕裂强度。
13.如权利要求11所述的罩箔,其中所述脆化剂被以按重量计约10%至约30%的量混合于所述粘结层和所述密封剂层中的一种或二种。
14.如权利要求11所述的罩箔,其中所述脆化剂是矿物。
15.如权利要求14所述的罩箔,其中所述脆化剂是以下中的一种或多种:
a)碳酸钙;
b)硫酸钙;
c)玻璃纤维;
d)高岭土;
e)云母;
f)硅石
g)滑石
h)硅灰石;以及
i)a至h中两种或更多种的混合物。
16.如权利要求11所述的罩箔,其中所述脆化剂在所述密封剂层内均匀地分布。
17.如权利要求11所述的罩箔,其中所述脆化剂在所述密封剂层内不均匀地分布,所述脆化剂在所述密封剂层的邻近所述粘结层的部分内浓度较高。
18.如权利要求11所述的罩箔,其中所述铝箔具有约20μm至约25μm的厚度。
19.如权利要求11所述的罩箔,其中所述铝箔是硬回火的(即未退火的)。
20.如权利要求11所述的罩箔,其中所述铝箔是软回火的(即退火的)。
21.一种制造压出式泡罩包装的方法,其包括以下步骤:
a.制造罩箔,包括以下步骤:
i)提供挤出包覆机;
ii)在挤出包覆机上提供一卷铝箔;
iii)挤出包覆具有约3g/m2至约8g/m2的包覆重量的包含乙烯酸共聚物的粘结层于所述铝箔上;以及
iv)挤出包覆具有约6g/m2至约16g/m2的包覆重量的包含改性的乙烯丙烯酸酯共聚物的密封剂层于所述粘结树脂上,所述粘结层和所述密封剂层中的一种或两种具有混合其中的按重量计约5%至约50%的量的脆化剂;
b.提供聚合性泡罩膜;并且
c.把所述罩箔密封至容纳可消费物质的所述泡罩膜,并且从而形成所述压出式泡罩包装。
由此可通过将所述可消费物质推向所述罩箔并破开所述罩箔从所述泡罩包装取回所述可消费物质。
22.如权利要求21所述的方法,其中所述泡罩膜包含选自由PVC、PVdC、PS、HIPS、PCTFE、HDPE、LLDPE、LDPE、PP、PETG、SBC、COC及其组合组成的组的聚合物。
23.如权利要求22所述的方法,其中所述泡罩膜包含聚三氟氯乙烯(PCTFE)。
24.如权利要求22所述的方法,其中所述泡罩膜包含环烯共聚物(COC)。
25.如权利要求21所述的方法,还包括以按重量计约5%至约50%的量加入混合于所述粘结层和密封剂层中的一种或二种中的脆化剂的步骤。
26.如权利要求25所述的方法,其中所述脆化剂是以下中的一种或多种:
a)碳酸钙;
b)硫酸钙;
c)玻璃纤维;
d)高岭土;
e)云母;
f)硅石
g)滑石
h)硅灰石;以及
i)a至h中两种或更多种的混合物。
27.如权利要求25所述的方法,其中所述脆化剂在所述密封剂层内均匀地分布。
28.如权利要求25所述的方法,其中所述脆化剂在所述密封剂层内不均匀地分布,所述脆化剂在所述密封剂层的邻近所述粘结层的部分内浓度较高。
29.如权利要求21所述的方法,其中所述粘结层和所述密封剂层被同时地共挤压于所述铝箔上。
30.如权利要求21所述的方法,其中所述粘结层和所述密封剂层被相继地挤出包覆于所述铝箔上。
31.如权利要求21所述的方法,其中所述铝箔具有约20μm至约25μm的厚度。
说明或声明(按照条约第19条的修改)
根据第19(1)条修改声明
请用显示页码23-29的替换页替代第23-33页。替换页附于本文并且与本声明同时提交。
权利要求1已被修改。
权利要求2-9保持不变。
权利要求10已被修改。
权利要求13已被修改并重新编号为权利要求11。
权利要求14已被修改并重新编号为权利要求12。
权利要求15已被修改并重新编号为权利要求13。
权利要求16已被修改并重新编号为权利要求14。
权利要求17已被修改并重新编号为权利要求15。
权利要求18已被修改并重新编号为权利要求16。
权利要求19已被修改并重新编号为权利要求17。
权利要求20已被修改并重新编号为权利要求18。
权利要求21已被修改并重新编号为权利要求19。
权利要求22已被修改并重新编号为权利要求20。
权利要求25已被修改并重新编号为权利要求21。
权利要求29已被修改并重新编号为权利要求22。
权利要求30已被修改并重新编号为权利要求23。
权利要求31已被修改并重新编号为权利要求24。
权利要求32已被修改并重新编号为权利要求25。
权利要求33已被修改并重新编号为权利要求26。
权利要求34已被修改并重新编号为权利要求27。
权利要求35已被修改并重新编号为权利要求28。
权利要求36已被修改并重新编号为权利要求29。
权利要求37已被修改并重新编号为权利要求30。
权利要求38已被修改并重新编号为权利要求31。
权利要求11、12、23、24、26-28和39-43已被删除。
备注
按照提交的要求,修改了VII框中注明的缺陷。
VII框中注明的意见已全部由本修改解决。特别地,根据意见1,已将原权利要求书修改,将令单位引用为同等的克每平方米。同样地,也按照要求提交修改说明书。对于意见2,原权利要求25(新权利要求21)现已被修改以引用脆化剂。对于意见3,原权利要求29中的商标Aclar已由等效的PCTFE代替。本修改也解决了意见4。对于意见5,已将原权利要求42和43删除,从而呈递本意见答复。
由于至少以下理由,由修改的权利要求所限定的本发明与引用的文献显著不同:
对于V框中所提供的引用和说明,新权利要求1-31中所限定的本发明现在完整引用具有聚合性泡罩膜的压入式泡罩包装,盖密封于所述聚合性泡罩膜,所述盖具有包含乙烯酸共聚物的粘结层和包含改性的乙烯丙烯酸酯共聚物的密封剂层,其中脆化剂混合于粘结层和密封剂层中的一种或两种中。在权利要求1中,盖依据它的Mullen脆裂强度和撕裂强度被限定;在修改的权利要求13(新权利要求11)及修改的权利要求15(新权利要求21)中,所述盖依据它的包覆重量被限定。
文件D1(USP 6224973)—该专利特别地涉及意图在容器的边缘被热密封的剥封层。(见第1列第7-8行)。仅有的提及与剥开相对的开盖的实施例是其实施例6-8,然而这些实施例中的任何一个或其它实施例的任何一个都不具有包含乙烯酸共聚物的粘结层或包含改性的乙烯丙烯酸酯共聚物的密封剂层,也没有任何脆化剂混合于这些实施例的粘结层和密封剂层中的一种或两种中。
文件D2(USP5145737)—该专利也涉及可剥的罩块物(lidstock):
“盖子和容器通过深焊连接,使得将盖子拉离容器的动作导致含惰性充填物的材料的内部断裂,”(见摘要);而且“当通过在盖子的外边缘上施用垂直拉力打开容器时,材料6将经历内部断裂并且将出现如图2中所示的分离,下部材料6的一部分已经保持附接于盖子而另一部分已经保持附接于容器的边缘。”(见第2列第40-47行)。并未提及含乙烯酸共聚物的粘结层或含改性的乙烯丙烯酸酯共聚物的密封剂层来形成具有该本申请的新独立权利要求1、11和21中引用的性质的压入式泡罩包装。
文件D3(USPA US2005/0077202)—审查员已应用该参考文献来表明与上文已经讨论的与现在要求保护的盖不同的D1的盖相结合的PCTFE或COC的泡罩膜。
本文附有一个附录,表明权利要求的修改。特别地,该附录包括权利要求的修改标记版本,以及显示修改的权利要求的已接受标记版本的替换页23-29,替换原23-33页。
Claims (43)
1.一种用于压出式泡罩包装的罩箔,所述罩箔包含:
铝箔;以及
挤出包覆于所述铝箔的一个或多个粘结层和挤出包覆于所述粘结层的一个或多个密封剂层,所述粘结层和所述密封剂层中的一种或二种具有混合其中的按重量计约5%至约50%的量的脆化剂;
其中所述罩箔的特征是约10psi至约30psi的Mullen脆裂强度及约30克力至约100克力的MD撕裂强度。
2.如权利要求1所述的罩箔,其中所述脆化剂被以按重量计约10%至约30%的量混合于所述粘结层和所述密封剂层中的一种或二种中。
3.如权利要求1所述的罩箔,其中所述脆化剂是矿物。
4.如权利要求3所述的罩箔,其中所述脆化剂是以下中的一种或多种:
a)碳酸钙;
b)硫酸钙;
c)玻璃纤维;
d)高岭土;
e)云母;
f)硅石
g)滑石
h)硅灰石;以及
i)a至h中两种或更多种的混合物。
5.如权利要求1所述的罩箔,其中所述脆化剂在所述密封剂层内均匀地分布。
6.如权利要求1所述的罩箔,其中所述脆化剂在所述密封剂层内不均匀地分布,所述脆化剂在所述密封剂层的邻近所述粘结层的部分内浓度较高。
7.如权利要求1所述的罩箔,其中所述铝箔具有约20μm至约25μm的厚度。
8.如权利要求1所述的罩箔,其中所述铝箔是硬回火的(未退火的)。
9.如权利要求1所述的罩箔,其中所述铝箔是软回火的(退火的)。
10.如权利要求1所述的罩箔,其中所述一个或多个粘结层以约每令2磅至约每令5磅的量包覆于所述箔上,并且所述一个或多个密封剂层以约每令4磅至约每令10磅的量包覆于所述粘结层上。
11.如权利要求1所述的罩箔,其中所述粘结层选自由以下组成的组:
a)聚乙烯;
b)乙烯酸共聚物;
c)乙二醇二乙酸酯共聚物;
d)乙烯丙烯酸酯共聚物
e)乙烯酐共聚物
f)改性的乙烯丙烯酸酯共聚物;
g)离聚物;
h)聚丙烯;
i)酸酐接枝聚丙烯;以及
j)a至i中两种或更多种的混合物。
12.如权利要求1所述的罩箔,其中所述密封剂层是选自由以下组成的组的聚烯烃:
a)聚乙烯;
b)聚丙烯;
c)乙烯丙烯酸酯共聚物;
d)乙二醇二乙酸酯共聚物;
e)改性的乙烯丙烯酸酯共聚物;
f)改性的乙二醇二乙酸酯共聚物;
g)离聚物;以及
h)a至g中两种或更多种的混合物。
13.一种用于压出式泡罩包装的罩箔,所述罩箔包含:
铝箔;以及
挤出包覆于所述铝箔的一个或多个粘结层和挤出包覆于所述粘结层的一个或多个密封剂层,所述粘结层和所述密封剂层中的一种或二种具有混合其中的按重量计约5%至约50%的量的脆化剂;
其中所述粘结层被以每令约2磅至约5磅的包覆重量挤出包覆,并且所述密封剂层被以每令约4磅至约10磅的包覆重量挤出包覆。
14.如权利要求13所述的罩箔,其中所述罩箔的特征是约10psi至约30psi的Mullen脆裂强度及约30克力至约100克力的MD撕裂强度。
15.如权利要求13所述的罩箔,其中所述脆化剂被以按重量计约10%至约30%的量混合于所述粘结层和所述密封剂层中的一种或二种。
16.如权利要求13所述的罩箔,其中所述脆化剂是矿物。
17.如权利要求16所述的罩箔,其中所述脆化剂是以下中的一种或多种:
a)碳酸钙;
b)硫酸钙;
c)玻璃纤维;
d)高岭土;
e)云母;
f)硅石
g)滑石
h)硅灰石;以及
i)a至h中两种或更多种的混合物。
18.如权利要求13所述的罩箔,其中所述脆化剂在所述密封剂层内均匀地分布。
19.如权利要求13所述的罩箔,其中所述脆化剂在所述密封剂层内不均匀地分布,所述脆化剂在所述密封剂层的邻近所述粘结层的部分内浓度较高。
20.如权利要求13所述的罩箔,其中所述铝箔具有约20μm至约25μm的厚度。
21.如权利要求13所述的罩箔,其中所述铝箔是硬回火的(即未退火的)。
22.如权利要求13所述的罩箔,其中所述铝箔是软回火的(即退火的)。
23.如权利要求13所述的罩箔,其中所述粘结层选自由以下组成的组:
a)聚乙烯;
b)乙烯酸共聚物;
c)乙二醇二乙酸酯共聚物;
d)乙烯丙烯酸酯共聚物
e)乙烯酐共聚物
f)改性的乙烯丙烯酸酯共聚物;
g)离聚物;
h)聚丙烯;
i)酸酐接枝聚丙烯;以及
j)a至i中两种或更多种的混合物。
24.如权利要求13所述的罩箔,其中所述密封剂层是选自由以下组成的组的聚烯烃:
a)聚乙烯;
b)聚丙烯;
c)乙烯丙烯酸酯共聚物;
d)乙二醇二乙酸酯共聚物;
e)改性的乙烯丙烯酸酯共聚物;
f)改性的乙二醇二乙酸酯共聚物;
g)离聚物;以及
h)a至g中两种或更多种的混合物。
25.一种制造用于压出式泡罩包装的罩箔的方法,其包括以下步骤:
a)提供挤出包覆机;
b)在挤出包覆机上提供一卷铝箔;
c)挤出包覆具有约2lbs/令至约5lbs/令的包覆重量的粘结层于所述铝箔上;以及
d)挤出包覆具有约4lbs/令至约10lbs/令的包覆重量的密封剂层于粘结树脂上。
26.如权利要求25所述的方法,其中所述粘结层选自由以下组成的组:
a)聚乙烯;
b)乙烯酸共聚物;
c)乙二醇二乙酸酯共聚物;
d)乙烯丙烯酸酯共聚物
e)乙烯酐共聚物
f)改性的乙烯丙烯酸酯共聚物;
g)离聚物;
h)聚丙烯;
i)酸酐接枝聚丙烯;以及
j)a至i中两种或更多种的混合物。
27.如权利要求25所述的方法,其中所述密封剂层是选自由以下组成的组的聚合物:
a)聚乙烯;
b)聚丙烯;
c)乙烯丙烯酸酯共聚物;
d)乙二醇二乙酸酯共聚物;
e)改性的乙烯丙烯酸酯共聚物;
f)改性的乙二醇二乙酸酯共聚物;
g)离聚物;以及
h)a至g中两种或更多种的混合物。
28.如权利要求25所述的方法,其中所述方法还包括密封所述罩箔于含可消耗物质的泡罩膜。
30.如权利要求29所述的方法,其中所述泡罩膜包含聚三氟氯乙烯(PCTFE)。
31.如权利要求29所述的方法,其中所述泡罩膜包含环烯共聚物(COC)。
32.如权利要求25所述的方法,还包括以按重量计约5%至约50%的量加入混合于所述粘结层和密封剂层中的一种或二种中的脆化剂的步骤。
33.如权利要求32所述的方法,其中所述脆化剂是以下中的一种或多种:
a)碳酸钙;
b)硫酸钙;
c)玻璃纤维;
d)高岭土;
e)云母;
f)硅石
g)滑石
h)硅灰石;以及
i)a至h中两种或更多种的混合物。
34.如权利要求32所述的方法,其中所述脆化剂在所述密封剂层内均匀地分布。
35.如权利要求32所述的方法,其中所述脆化剂在所述密封剂层内不均匀地分布,所述脆化剂在所述密封剂层的邻近所述粘结层的部分内浓度较高。
36.如权利要求25所述的方法,其中所述粘结层和所述密封剂层被同时地共挤压于所述铝箔上。
37.如权利要求25所述的方法,其中所述粘结层和所述密封剂层被相继地挤出包覆于所述铝箔上。
38.如权利要求25所述的方法,其中所述铝箔具有约20μm至约25μm的厚度。
39.一种包含热封于权利要求1所述的罩箔的泡罩膜压出式泡罩包装。
40.一种包含热封于权利要求13所述的罩箔的泡罩膜压出式泡罩包装。
41.如权利要求28所述的方法,其中所述泡罩膜包含选自由PVC、PVdC、PS、PCTFE、HDPE、LLDPE、LDPE、PP、PETG、SBC、COC及其组合组成的组的聚合物。
42.如权利要求40所述的方法,其中所述泡罩膜包含聚三氟氯乙烯(PCTFE)。
43.如权利要求40所述的方法,其中所述泡罩膜包含环烯共聚物(COC)。
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-
2008
- 2008-02-28 CN CN2008801288517A patent/CN102015284A/zh active Pending
- 2008-02-28 WO PCT/CA2008/000429 patent/WO2009105858A1/en active Application Filing
- 2008-02-28 EP EP08714748A patent/EP2254751A4/en not_active Withdrawn
- 2008-02-28 MX MX2010009484A patent/MX2010009484A/es not_active Application Discontinuation
- 2008-02-28 US US12/920,233 patent/US20110005961A1/en not_active Abandoned
- 2008-02-28 CA CA2716988A patent/CA2716988A1/en not_active Abandoned
-
2009
- 2009-03-16 US US12/404,738 patent/US8329309B2/en active Active
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CN103587165A (zh) * | 2013-10-31 | 2014-02-19 | 佛山佛塑科技集团股份有限公司 | 一种冷冲成型用高密封柔性复合薄膜材料及其制造方法 |
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US20100170820A1 (en) | 2010-07-08 |
US20110005961A1 (en) | 2011-01-13 |
US8329309B2 (en) | 2012-12-11 |
WO2009105858A8 (en) | 2010-12-23 |
EP2254751A1 (en) | 2010-12-01 |
CA2716988A1 (en) | 2009-09-03 |
MX2010009484A (es) | 2010-12-21 |
EP2254751A4 (en) | 2013-01-02 |
WO2009105858A1 (en) | 2009-09-03 |
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