CN110621490A - 用于密封胶囊的包括阻氧层的可堆肥盖以及由该盖密封的胶囊 - Google Patents
用于密封胶囊的包括阻氧层的可堆肥盖以及由该盖密封的胶囊 Download PDFInfo
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Abstract
一种可堆肥盖,其用于密封特别是含有咖啡的胶囊,所述盖由多层制品组成,所述多层制品至少包括:非织物,所述非织物的纤维含有至少50重量%的可生物降解纤维;支承物,所述支承物由植物羊皮纸组成;至少一层阻氧层。
Description
技术领域
本发明涉及一种盖(lid),其包括阻氧层,所述盖用于密封胶囊,特别是咖啡胶囊。用所述盖密封的胶囊也是本发明的主题。最后,本发明涉及密封含有食品、特别是研磨咖啡的胶囊的盖的用途。
在下面的描述中,关于咖啡胶囊描述了本发明。然而,本发明可以被应用于所有领域中,其中盖可能密封食物物质,且必须是抗水、抗压、抗撕裂、且可以有利地热封在胶囊或任何其他食物容器上的阻氧物。
现有技术
目前,市场上提供两种类型的咖啡包,即:
-柔性包(pod),基本上由含有咖啡的非织物袋组成,
-刚性包或胶囊,严格上来说通过盖封闭的胶囊组成。
本发明具体涉及胶囊。
在欧洲市场上广泛已知的是奈斯派索型胶囊,型胶囊的实际的胶囊部分和覆盖物基本上由铝制成。也存在其覆盖物由塑料材料制成的胶囊。
然而,将这些不可堆肥(non-compostable)胶囊转化为可堆肥(compostable)胶囊的需求很高。
关于实际胶囊部分,已经提出了一些稀有的解决方案。因此,已经开发了由聚乳酸类塑料(PLA)材料或所谓的“PLA相容的(compatible)”塑料材料制成的胶囊。所谓的“PLA相容的”材料对应于PLA和植物纤维(vegetable fibers)的混合物。它们是可生物降解的并且是可堆肥的。因此,这些胶囊符合标准EN 13432规定的可堆肥性条件。
另一方面,获得可堆肥盖(compostable lid)更为复杂,因为存在与覆盖物或盖相关联的众多约束。事实上,这些胶囊可能被用于具有胶囊必须机械抵抗的压力和温度的咖啡机中。
基本上,根据以下过程,将胶囊用在具有单独的包或胶囊的咖啡机中。一旦胶囊被放置在其位置上,胶囊的底部就会被压紧。形成的孔可以在10到12巴之间的压力下将加热到96℃的温度的水引入到胶囊的主体中。填充胶囊的水向盖上逐渐施加压力,该盖与设置在机器中的尖刺型刺穿元件接触。根据咖啡的粒度,穿孔盖时以及渗滤期间的压力通常处于5和15巴之间。一旦以尖刺的形式刺穿盖,咖啡就会流入杯中。制造商在咖啡流动方面施加了一定数量的条件。特别是,杯中不得有任何粉末。此外,约30mL的包必须在约30秒内流动。此外,正在流动的液体必须具有类似于泡沫的颜色和密度。一旦咖啡流动,但胶囊还未被弹出(ejected)时,也存在一定数量的约束。事实上,在用户仅在咖啡流动后几小时弹出胶囊的假设情况下,即一旦胶囊的温度回到环境温度,则胶囊不得变形。否则,当新的胶囊被引入时,它将不会落入为此目的提供的容器中。盖也不得分层。
换句话说,需要具有抗潮湿和抗压的可堆肥盖,使得它不会在刺穿之前或刺穿时撕裂。还需要提供当咖啡流动时不允许粉末经过的盖。
文献FR 2 991 230 Al描述了一种多层制品,该多层制品结合了基于可生物降解聚合物的非织物、适于与食物接触的粘合剂层和用于模具生产的纤维素纤维类的支承物。以这种方式获得的模具具有抵抗来自食物的水分的特性,使得将它放置在模具中时,这些模具的边缘不会塌陷。当然,没有提到压力条件,因为压力不是该申请必须要考虑的参数。
以本申请人的名义的申请FR16/53909描述了一种用于密封特别是含有咖啡的胶囊的可堆肥盖,该盖由多层制品制成,该多层制品结合了基于聚乳酸纤维的非织物和由植物羊皮纸制成的支承物。
因此,本发明提出解决的问题是如何设计一种用于密封胶囊、特别是含有咖啡的胶囊的可堆肥盖,该盖满足这种类型的盖在咖啡机中、特别是具有单独的包或胶囊的咖啡机中的使用条件,特别是抗潮湿、在穿孔(perforating)盖时以及渗滤期间抵抗由约5至15巴的粉末和水的混合物施加的压力、不分层、防止渗滤时咖啡进入杯中的过滤特性,此外,该盖是阻氧物。
本发明提出解决的另一问题也是设计一种盖,该盖可以集成到目前的胶囊生产线中,而无需对所述生产线进行任何实质性修改。
发明概述
为了做到这一点,申请人已经设计了一种可堆肥制品,其有利地结合了PLA纤维类的非织物、阻氧层和植物羊皮纸支承物。因此,所获得的盖是阻氧物,该阻氧物对5和15巴之间的所需压力、对潮湿具有抵抗,且该阻氧物是易于集成到现有的胶囊生产线中的阻氧物。
此外,非织物防止了在咖啡流入到杯中时粉末穿过盖,并且阻氧物限制了使用胶囊前氧气通入到咖啡。
更准确地,本发明的主题是一种可堆肥盖,其用于密封特别是含有咖啡的胶囊,所述可堆肥盖由多层制品组成,所述多层制品至少包括:
-含有纤维的非织物,所述纤维中至少50%重量是可生物降解纤维;
-支承物,所述支承物由植物羊皮纸组成;
-至少一层阻氧层。
在下面的说明书中以及权利要求书中,“可堆肥盖”指的是包括总比例最大5重量%的没有确定可生物降解能力的有机成分(例如,来自粘结剂或不可堆肥纤维)的盖,因此符合标准EN 13432。
同样地,“可堆肥胶囊或胶囊主体”指的是包括总比例最大5重量%的没有确定可生物降解能力的有机成分(例如,来自粘结剂或不可堆肥纤维)的胶囊或胶囊主体,因此符合标准EN 13432。
如本文所用,术语“可生物降解纤维”表示纤维可以被生物体、例如微生物分解为有机物质。可生物降解纤维可以包括以下材料中的一种或多种:聚羟基烷酸酯(polyhydroxyalkanoates,PHAs),包括聚乳酸或聚交酯(polylactide,PLA)纤维以及由PLA和PHA的共聚物而非PLA制成的纤维;可生物降解的聚乙烯(PE);可生物降解的聚丙烯(PP);可生物降解的聚丁二烯(polybutane,PB);淀粉类聚合物;纤维素类聚合物;乙烯-乙烯醇(EVOH)聚合物;其他可生物降解聚合物如聚丁二醇丁二酸(polybutanediol succinicacid,PBS)等。
在优选实施方案中,含有本文描述的可生物降解纤维的非织物满足标准EN 13432的可堆肥性和可生物降解性。
有利地,至少40重量%的可生物降解纤维是可热封纤维(thermosealablefiber),有利地是聚乳酸(PLA)纤维。
在下面的说明书中以及权利要求书中,措辞“可热封纤维”指的是能够确保通过加热密封胶囊上非织物的可生物降解纤维。这些纤维有利地是PLA纤维,该PLA纤维能够将非织物热封在可堆肥PLA胶囊上。
在本发明的框架内,如果根据标准ASTM D 3985和ASTM F 1927测量的氧气通过盖的传递速率小于或等于1.5cm3/m2/天,则认为盖在阻氧性能方面是令人满意的。
同样地,当在穿孔盖时以及渗滤期间盖受到5和15巴之间的粉末和水的混合物施加的压力时,如果盖不撕裂,则认为盖在抗压方面令人满意。穿孔前,盖不得因胶囊中增加的水压的作用而撕裂。穿孔后,穿孔产生的孔不得因压力的作用而撕裂,同样尺寸不得增大,从而一方面不允许粉末漏出,另一方面尤其保留咖啡的泡沫特征。
存在几种类型的咖啡胶囊,且目前正在开发其他胶囊,并且将在后续阶段开发其他胶囊。根据本发明的盖提供了以下优点:根据本发明的盖可以容易地适用于所有类型的胶囊,无论是已知的还是仍待出现的。
例如,一种胶囊可以引用专利US 7 658 141和US 7 153 530中描述的截锥(truncated cone)形式的半刚性胶囊。一种胶囊还可以引用专利US 8 956 672,其公开了倒置杯(inverted cup)形式的胶囊。专利EP 2 690 035公开了截锥形式的胶囊,该胶囊的基部被穿孔。专利EP 2 648 579的部分描述了截锥形式的胶囊,从外部观察时,该胶囊最小的基部是凹形的。一种胶囊还可以引用专利EP1 344 722和US 7 543 527,其公开了特别是包括分配盘(distribution disc)的胶囊。一种胶囊可以引用文献EP 1659909Al,其描述了包括集成注射喷嘴的胶囊。一种胶囊还可以参考文献US 8 361 527、EP 1 529 739和US 5325 765中描述的胶囊。
根据第一特征,本发明的盖含有非织物,非织物的纤维包括至少50重量%的可生物降解纤维。
可生物降解纤维优选地选自包括如棉、亚麻、木纤维的纤维素纤维或者PLA(聚乳酸(polyactic acid))、PHA(聚羟基烷酸酯(polyhydroxyalkanoate))、PHB(聚羟基丁酸酯(poly(hydroxybutyrate))、PHB(V)(聚羟基丁酸酯-羟基戊酸共聚酯(poly(hydroxybutyrate-co-hydroxyvalerate))、PBS(聚丁二酸丁二醇酯(poly(butylenesuccinate)))、生物聚酯纤维的组。
聚乳酸(PLA)提供了特别是生物来源的(biosourced)、可生物降解的以及可堆肥的优点。“PLA”指的是聚乳酸、其衍生物(L型和D型或共聚物)及其混合物。PLA纤维有利地具有处于10和15微米的直径。
有利地,至少40重量%的可生物降解纤维是可热封纤维。
优选地,可热封纤维选自包括PLA、PHA(聚羟基烷酸酯)、PHB(聚羟基丁酸酯)、PHB(V)(聚羟基丁酸酯-羟基戊酸共聚酯)、PBS(聚丁二酸丁二醇酯)、生物聚酯的组。
可热封纤维优选地具有至少100℃、实际上处于100和250℃、优选100和200℃之间的熔点。
通常,非织物是通过交错的单根纤维(individual fibers)的随机排列而获得的材料。例如可以通过粘合剂(adhesive)或粘结剂(binders)(乳胶、聚乙烯醇、淀粉等)、通过加热、通过压力、或通过针刺(needling),确保纤维彼此的结合。制备非织物的众多方法构成本领域技术人员知识的部分。这些方法包括例如熔喷纺丝(meltblowing spinning)工艺、直接纺丝或纺丝成网(spin laying)或纺粘(spunbond)工艺、梳理、气流成网(airlaying)或湿法成网(wet laying)。
除了纤维外,非织物还可包括添加剂和矿物填料。掺入添加剂、填料或除PLA纤维以外的纤维可以调节PLA的基层的熔点。
实际上,构成非织物的纤维包括至少20重量%、优选地至少50重量%、有利地至少85重量%、更优选地至少90重量%的PLA纤维,使构成所述非织物的所述纤维达到100%的添加物由可生物降解纤维、有利地纤维素纤维形成。除了PLA纤维之外,非织物可包括其他可生物降解纤维,优选纤维素纤维。在一优选实施方案中,非织物由仅选自可生物降解纤维的纤维形成。有利地,在本实施方案中,通过湿法成网生产非织物。
在一具体实施方案中,100%的非织物的纤维由可热封纤维制成,有利地由PLA纤维制成。在这种情况下,在没有任何粘合剂或粘结剂的情况下,通过纺粘生产工艺获得纤维的结合,从而获得非织物的结合。
当非织物含有100重量%的PLA时,非织物可以是单层的。有利地,其可以是双层非织物。双层可以是单组分的、即仅含有一种类型的PLA;或者是双组分的、即含有具有不同熔点的两种类型的PLA。
根据其他特征,根据标准DIN 53.887测量的非织物的孔隙率(porosity)处于3000和5000l/m2/s之间。
最后、且实际上,非织物的克重处于5和100g/m2之间,有利地处于10和30g/m2之间,更有利地处于15和20g/m2之间,优选地为约18g/m2。
根据本发明的一个基本特征,支承物由植物羊皮纸制成,该植物羊皮纸在法语中被称为“真实的(véritable)”(“真正的(genuine)”)。Mayer,Ferdinand F(May 1860)的著作"Technical Intelligence-Vegetable Parchment-Papyrene",The American Journalof Science and Arts,XXIX(LXXXVI):278中给出了植物羊皮纸的详细描述。本质上,植物羊皮纸是大部分时间都用硫酸处理的纸。很少地,可以用氯化锌。纤维是通常选自桉树纤维和树脂纤维的纤维素纤维。实际上,硫酸分解了纤维周围的纤维素。纤维素凝胶形成,然后将其沉淀。在最后的步骤中,冲洗支承物。所应用的处理形成了交联硫化的片材,其具有高密度、高稳定性、高抗热性以及低表面能,这些为其提供了令人满意的抗粘性能。
因此,支承物既不是高密度防油纸,也不是化学处理的防油纸(例如,用氟化树脂处理的)。支承物也不含任何树脂,从而在湿状态下产生机械强度。
为了提高其抗压性,植物羊皮纸的具有处于50和70%之间的、根据标准ISO 3689/1994测量的湿耐破强度/根据标准ISO 2758:2001测量的干耐破强度的比值,该比值优选地处于55和65%之间。
实际上,植物羊皮纸的克重处于30和120g/m2之间,有利地处于70和110g/m2之间。
同样地,其厚度实际上处于60和130微米之间。
根据另一基本特征,盖含有至少一层阻氧层。特别地,阻氧物可以将包含在胶囊中的咖啡保持更长时间。
根据第一实施方案,阻氧层放置在非织物和支承物之间。因此,盖在胶囊的方向上依序含有支承物、阻氧层和非织物。
根据第二实施方案,非织物放置在支承物下方,且阻氧层放置在支承物上方。因此,盖在胶囊的方向上依序含有阻氧层、支承物和非织物。各阻隔层其自身可以由多层组成。
根据第三实施方案,根据本发明的盖包括两层阻氧层。
在第一种具体情况下,两层阻隔层并排放置,且有利地放置在非织物和支承物之间。
因此,盖在胶囊的方向上依序含有支承物、两层阻氧层和非织物。
在第二种具体情况下,两层阻隔层是分开的,且放置在支承物的两侧(或任一侧,either side)。因此,盖在胶囊的方向上依序含有阻氧层、支承物、第二阻氧层和非织物。
根据另一特征,阻氧层可具有不同组分。
实际上,阻氧层基于聚乙烯醇(PVA)。
在第一实施方案中,阻隔层含有聚乙烯醇与聚酰胺表氯醇类树脂的混合物。优选地,聚酰胺表氯醇类树脂为卡墨涅(碱性熟化阳离子树脂,kymene)。在这种情况下,阻氧层含有干重80%和95%之间、优选地85%和90%之间的PVA,使构成所述非织物的所述纤维达到100%的添加物由聚酰胺表氯醇类树脂组成。
在第二实施方案中,阻氧层基于聚乙烯醇,聚乙烯醇的水解度处于98%和99%之间。如上所述,阻隔层还可含有与以上给出的比例相同比例的聚酰胺表氯醇类树脂。
在第三实施方案中,阻氧层基于高度无定形聚乙烯醇。一个实施例是麦可门(MICHELMAN)销售的 Flex Barrier 3510。
在第四实施方案中,阻隔层基于乙烯乙烯醇共聚物(EVOH)。
实际上,阻氧层的总克重(即,当其由一层或两层或更多层组成时)处于0.5g/m2和8g/m2之间,有利地从2至5g/m2。
实际上,阻氧层通过涂覆施加到支承物上。当用两层阻隔层处理支承物时,支承物依次被两个不同的层涂覆。
有利地,盖还含有至少一层粘合剂层,优选地适于与食物接触。
根据以上呈现的实施方案,粘合剂层被施加到阻氧层和非织物之间,或者支承物和非织物之间。
特别地,在胶囊上的盖的热封期间,粘合剂可以在多层制品暴露于接近或高于PLA熔融温度的温度时确保多层制品的结合。当渗滤期间多层制品与热水接触时,以及之后的冷却期间,如果适用,则粘结剂还可以将硫化支承物或硫化支承物制品/阻氧层保持在焊接至胶囊的PLA层上。
术语“适于与食物接触的粘合剂”指的是通常在农业食品工业中使用的任何类型的粘合剂。然而,有利地,粘合剂可选自包括丙烯酸粘合剂、聚氨酯粘合剂、乙烯乙酸乙烯酯及其混合物的组。
在一优选实施方案中,适于与食物接触的粘结剂选自路博润(Lubrizol)销售的和系列的丙烯酸粘合剂,可单独使用或混合使用。
相对于多层制品的表面,粘合剂的量实际上表示为干燥时处于1和5g/m2之间,有利地在干燥时处于2和4g/m2之间,优选地在干燥时为约3g/m2。
施用阻氧层和粘合剂,使得多层制品包括总比例最大5重量%的没有确定可生物降解能力的有机成分,因此符合标准EN 13432。
本发明主题的多层制品的厚度有利地处于60和150微米之间、优选地处于90和110微米之间。
根据又一特征,本发明的盖可以被穿孔。
本发明的主题还是一种特别是包括咖啡的胶囊,其包括也称为“胶囊主体”的实际的胶囊,该“胶囊主体”含有研磨咖啡且用如上所述的盖封闭,盖优选地定位成使得非织物面对胶囊的边缘。
实际上,胶囊含有5至20克的研磨咖啡。咖啡粉床(bed of coffee)的厚度处于10和40mm之间,且胶囊的直径处于2.5和6cm之间。
在一优选实施方案中,胶囊主体由PLA制成或由PLA相容的材料制成。这提供了以下优点:只要材料是相容的(PLA或PLA相容的),就能够通过密封、热封、胶合等将盖结合至胶囊主体。
根据前述标准EN 13432,胶囊和/或胶囊主体有利地是可堆肥的。
作为参考,本文所附的NF EN 13432:2000-11“通过堆肥和生物降解评定包装可回收性的要求(Requirements for packaging recoverable throughcomposting andbiodegradation)”中描述了测试标准的全部细节和满足标准的要求。
根据标准,如EN 13432所规定的,当前发明的可堆肥盖和/或可堆肥胶囊也优选地在生物废物处理工艺中分解,使得不超过10%原始干重的测试材料无法通过大于2mm的碎片套筒(sleeve)。
在优选实施方案中,根据前述标准EN 13432,可堆肥盖自身有利地是可堆肥的。
包括胶囊主体和盖的胶囊优选地用在具有包或独立胶囊的咖啡机中。
本发明还涉及上述用于密封胶囊、特别是咖啡胶囊的盖的用途,盖定位成使得非织物面对胶囊的边缘。
从以非限制性的方式提供用以说明本发明的附图和以下实施例中,本发明及其产生的优点将变得更加清楚。
附图说明
图1示出了本发明主题的盖的第一实施方案。
图2示出了本发明主题的盖的第二实施方案。
图3示出了本发明主题的盖的第三实施方案。
图4示出了本发明主题的盖的第四实施方案。
具体实施方式
根据本发明的结构的实施例
图1示出了多层制品形式的盖,其依序包括:
-支承物(1),其由植物羊皮纸制成;
-阻氧层(2);
-非织物(3),其包括100重量%的由PLA制成的纤维。
图2中,盖是多层制品形式,其依序包括:
-阻氧层(2);
-支承物(1);
-非织物(3)。
图3中,盖是多层制品形式,其依序包括:
-阻氧层(2);
-支承物(1);
-第二阻氧层(2);
-非织物(3)。
图4中,盖是多层制品形式,其依序包括:
-支承物(1);
-阻氧层(2);
-第二阻氧层(2);
-非织物(3)。
根据本发明的盖的实施例
实施例1至7示出了根据本发明的盖的几种配置。
在所有实施例中,非织物是仅由PLA纤维形成的双层。这是克重为18g/m2的单组分双层。
同样地,在所有实施例中,非织物通过粘合剂层(未示出)与其上方的层是分开的,即与阻氧物是分开的(图1、3或4)或与支承物是分开的,该粘合剂层(未示出)在干燥时以多达3g/m2的比例(rate)施加。粘合剂选自路博润(Lubrizol)销售的和系列的丙烯酸粘结剂,可单独使用或混合使用。
支承物(1)是申请人销售的名为的植物羊皮纸,克重为70g/m2或110g/m2。
测试了三种类型的阻氧层:
-干燥时比例为2g/m2的含有极度无定形PVA(HAVOH)的100重量%水性原液:由麦可门以参照 Flex Barrier 3510下所销售的;
-90干重%的PVA和10%的聚酰胺表氯醇类树脂干燥时,以2.5g/m2的比例施加该层;
-90干重%的部分水解的PVA和10%的聚酰胺表氯醇类树脂干燥时,以2.5g/m2的比例施加该层。
施加阻氧层和粘合剂层,使得实施例1-7包括总比例的最大5重量%没有确定可生物降解能力的有机成分。
根据标准ASTM D 3985和ASTM F 1927,在相对湿度50%、温度23℃、大气压(1.013巴)下,测量了氧气传递速率。实施例1-7所获得的结果在下面显示的表中列出。具有阻氧层的所有实施例显示出了令人满意的阻氧性能,氧气传递速率小于1.5cm3/m2/天。
在没有阻氧层的情况下,以上样品显示出非常高的氧气传递速率,不令人满意。
然后检查盖的抗压性。为了做到这一点,将胶囊放置在小精灵(Pixie)机器中,并在整个渗滤期间压力都会随之升高。根据包含在胶囊中的咖啡的粒度测定,压力处于5和15巴之间。所测试的盖无一因压力的作用而撕裂。
Claims (20)
1.一种可堆肥盖,其用于密封特别是含有咖啡的胶囊,所述盖由多层制品组成,所述多层制品至少包括:
-非织物,所述非织物的纤维含有至少50重量%的可生物降解纤维;
-支承物,所述支承物由植物羊皮纸组成;
-至少一层阻氧层。
2.根据权利要求1所述的盖,其特征在于,至少40重量%的所述可生物降解纤维是可热封纤维。
3.根据前述任一项权利要求所述的盖,其特征在于,所述可生物降解纤维选自包括诸如棉、亚麻、木纤维的纤维素纤维或者PLA、PHA(聚羟基烷酸酯)、PHB(聚羟基丁酸酯)、PHB(V)(聚羟基丁酸酯-羟基戊酸共聚酯)、PBS(聚丁二酸丁二醇酯)、生物聚酯纤维的组。
4.根据前述任一项权利要求所述的盖,其特征在于,所述可热封纤维选自包括PLA、PHA(聚羟基烷酸酯)、PHB(聚羟基丁酸酯)、PHB(V)(聚羟基丁酸酯-羟基戊酸共聚酯)、PBS(聚丁二酸丁二醇酯)、生物聚酯的组。
5.根据前述任一项权利要求所述的盖,其特征在于,构成所述非织物的所述纤维包括至少50%、有利地至少85%、更有利地至少90重量%的PLA纤维,使构成所述非织物的所述纤维达到100%的添加物由可生物降解纤维构成。
6.根据权利要求1至4中任一项所述的盖,其特征在于,构成所述非织物的所述纤维包括100%重量的PLA纤维。
7.根据前述任一项权利要求所述的盖,其特征在于,所述植物羊皮纸具有处于50%和70%之间的、根据ISO标准3689/1994测量的湿耐破强度/根据ISO标准2758:2001测量的干耐破强度的比值。
8.根据前述任一项权利要求所述的盖,其特征在于,所述植物羊皮纸的克重处于30和120g/m2之间,有利地处于70和110g/m2之间。
9.根据前述任一项权利要求所述的盖,其特征在于,所述阻氧层放置于所述非织物和所述支承物之间。
10.根据权利要求1至9中任一项所述的盖,其特征在于,所述非织物放置在所述支承物下方,且所述阻氧层放置在所述支承物上方。
11.根据前述任一项权利要求所述的盖,其特征在于,所述盖包括两层阻氧层。
12.根据权利要求11所述的盖,其特征在于,所述两层阻氧层并排放置在所述非织物和所述支承物之间。
13.根据权利要求11所述的盖,其特征在于,所述两层阻氧层是分开的、且放置在所述支承物的两侧上。
14.根据前述任一项权利要求所述的盖,其特征在于,所述阻氧层基于聚乙烯醇,或者包括聚乙烯醇与聚酰胺表氯醇类树脂的混合物。
15.根据前述任一项权利要求所述的盖,其特征在于,所述阻氧层的总克重处于0.5g/m2和8g/m2之间,有利地处于2和5g/m2之间。
16.根据前述任一项权利要求所述的盖,其特征在于,所述盖还包括施加在所述阻氧层和所述非织物之间的粘合剂层。
17.根据前述任一项权利要求所述的盖,其特征在于,所述盖具有5和15巴之间的抗压性。
18.一种咖啡胶囊,其尤其包括胶囊主体,所述胶囊用根据权利要求1至17中任一项所述的盖封闭,所述盖定位成使得所述非织物面对所述胶囊主体的边缘。
19.根据权利要求18所述的胶囊,其特征在于,所述胶囊含有5至20克的研磨咖啡,具有10和40mm之间的咖啡粉床厚度以及2.5和6cm之间的直径。
20.根据权利要求1至19中任一项所述的盖用于密封胶囊的用途,所述盖定位成使得所述非织物面对所述胶囊主体的边缘。
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FR1753723 | 2017-04-28 | ||
PCT/EP2018/060888 WO2018197676A1 (en) | 2017-04-28 | 2018-04-27 | Compostable lid comprising an oxygen barrier layer for sealing a capsule and capsule sealed by the lid |
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BR112019022277B1 (pt) | 2024-04-30 |
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WO2018197676A1 (en) | 2018-11-01 |
BR112019022277A2 (pt) | 2020-05-19 |
US20200140187A1 (en) | 2020-05-07 |
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