CN109070562A - 容器用聚酯层压管 - Google Patents
容器用聚酯层压管 Download PDFInfo
- Publication number
- CN109070562A CN109070562A CN201780028243.8A CN201780028243A CN109070562A CN 109070562 A CN109070562 A CN 109070562A CN 201780028243 A CN201780028243 A CN 201780028243A CN 109070562 A CN109070562 A CN 109070562A
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- CN
- China
- Prior art keywords
- layer
- film
- microns
- polyethylene
- layered product
- Prior art date
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- Granted
Links
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Abstract
聚酯膜与其它聚合物层压而形成板。由所述板可以制造用于诸如牙膏等液体和糊体产品的层压管等。层压体包括外聚乙烯膜、粘合剂层、聚酯膜和复合聚乙烯膜,该复合聚乙烯膜包含夹在至少一个聚乙烯膜与内聚乙烯膜之间的至少一个共挤出的聚乙烯层。
Description
技术领域
本发明属材料科学领域并且涉及包装用聚酯层压管。
背景技术
聚酯膜、特别是由聚对苯二甲酸乙二酯构成的双轴取向膜已被广泛用作包装材料或者作为复印膜的基材等。PET膜的常规用途是用于与其它聚合物、纸或箔层压。PET膜通常用聚乙烯或乙烯共聚物通过挤出涂布来涂布,以便获得热密封性能、与诸如铝箔等另一种材料的粘附力、额外的体积(厚度)或刚度,或者以便于实现仅采用PET膜所无法获得的性质。令人失望的是,PET膜的表面对于采用其它聚合物的挤出涂布的接受性不好。基于溶剂的聚氨酯粘合剂和聚乙烯亚胺底漆常常用来解决这个问题。经过针对挤出涂布的处理或涂底而没有进行额外的涂底或电晕处理的PET膜对于转换器是优选的,以便与其它聚合物层压。
板材主要用于制造在管体中由塑料膜构成的层压管容器,以便防止内容物因来自层压管容器外部的氧气引起的氧化所致的劣化。可以例举出具有优异氧阻挡性、水蒸气阻挡性等的材料作为与聚乙烯层或另一密封剂层一起层压的阻挡膜。由于铝箔的极高气体阻挡性,铝箔是最为广泛使用的材料。然而,铝箔不可避免地是不透明的,从而无法透过铝阻挡层压管直接看到内部的内容物。因此,对于具有高透明度的层压管容器有着越来越大的需求。
已发现各种各样的PET层压体可用于制造各种设计的包装,以下专利描述了已成功用在消费品包装中的层压体组合物的类型。
美国专利5,612,106号公开了具有包含基板、二氧化硅沉积层、热缓冲层和热粘合树脂的挤出涂布层的主体的层压管容器。如PET等热缓冲层防止在二氧化硅沉积层中由热粘合树脂的挤出涂布层在层压时的热量而产生裂纹。热缓冲层优选通过不要求加热的干层压或无溶剂层压来形成。可以在热缓冲层和热粘合树脂的挤出涂布层之间可选地设置锚定涂层,从而能够改善这些层之间的粘合强度。
美国专利5,942,320号公开了包含基底膜、含有硅烷偶联剂的锚定涂层和诸如偏二氯乙烯系列共聚物、乙烯-乙烯醇共聚物等阻挡树脂的阻挡复合膜,其中所述层以参照顺序形成于基底膜的至少一侧上。锚定涂层可以由含氯树脂、聚异氰酸酯化合物以及具有-10℃至20℃的玻璃转变温度的饱和聚酯树脂制成。热密封层可以形成于涂布层的表面或基底膜的另一侧上。设置有无机层的这种复合膜即使在诸如扭曲处理等苛刻条件下也避免了其粘合性质和阻挡性质的损失。
PCT专利申请PCT/DK01/00289号公开了由至少一个塑料网和安置于该塑料网的每一侧上且优选与网带(web bond)连接的至少两个塑料膜组成的塑料层压体,其中所述层压体可弯曲,且其中塑料膜的对应熔点基本相同。
美国专利10/493,088号公开了包含六层膜的复合膜结构。外层是诸如取向聚酯等不熔层。第二层是线性低密度聚乙烯(LLDPE)。第四层是由粘合(第三)层夹持的EVOH层。第五层是密封剂层。该复合膜可用于制造使用旋转热密封的袋。
美国专利6,896,754 B2号公开了包含至少两个热塑性树脂膜层的包裹洁膜。所述包裹洁膜通过在耐热性基板的前表面和后表面上干层压由至少两个热塑性膜层组成的共挤出膜而形成。
发明内容
本发明涉及与其它聚合物层压而形成板的聚酯膜。可以由所述板制造用于诸如牙膏和洗液等液体和糊体产品的层压管。本发明还涉及具有由包含外聚乙烯膜、聚酯膜和内聚乙烯膜的板材制成的主体(其被形成为层压管)的层压管容器。该层压管可用于储存诸如洗液、乳膏和牙膏等糊体产品。
具体实施方式
本发明致力于提供具有气体阻挡性以及耐刮擦性的层压管容器。用于包装的层压管常常通过如凸版印刷、柔版印刷、紫外胶版印刷等表面印刷进行装饰。对于层压管也可以在PET上直接或背面印刷。印刷的PET膜进一步与其它塑料膜层压以便形成层压板。该方法用于提高对印刷油墨的保护。然而,本发明采用在PET膜的直接/背面印刷和在PET层压板上的抗刮擦清漆的表面印刷。
在本发明的一个实施方式中,其涉及具有包含以下的层压体:
作为外聚乙烯膜的第一层;
作为粘合剂层的第二层;
作为聚酯膜的第三层;
作为粘合剂层的第四层;和
作为复合聚乙烯膜的第五层,
其中,所述复合聚乙烯膜包含至少一个共挤出的聚乙烯层,所述至少一个共挤出的聚乙烯层夹在粘附于所述粘合剂层的至少一个聚乙烯膜与内聚乙烯膜之间。
在本发明中,通过在聚酯膜的顶部和/或底部使用粘合剂而将聚酯膜层粘合层压。用在该工序中的粘合剂的类型通常由双组分聚氨酯制成。
用在粘合-层压中的粘合剂可以为聚酯类或聚醚类聚氨酯树脂。涂布的粘合剂的量为2g/m2至10g/m2,优选为1g/m2至8g/m2。合适的溶剂包括芳香烃、醇、乙酸酯、酯和含卤素烃。
在本发明中,借助共挤出层压利用熔融LLDPE将这种粘合-层压PET多层膜进一步与聚乙烯膜层压。
内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜可以是单层膜、三层膜或多层膜。
内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜可以选自由LDPE、LLDPE、HDPE及其混合物组成的组。
内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜的厚度可以分别为90微米至165微米、120微米至140微米和45微米至65微米。
所述聚酯膜是聚对苯二甲酸乙二酯(PET)膜,优选为印刷的非晶聚酯(APET)膜或取向聚酯(BOPET)膜,且厚度可以为12微米至20微米。
所述共挤出的聚乙烯层可以选自由挤出的LLDPE层、挤出的LDPE层及其混合物组成的组,且厚度可以为15微米至80微米。
在本发明的另一个实施方式中,其涉及具有包含以下的结构的层压体:
作为外聚乙烯膜的第一层;
作为粘合剂层的第二层;
作为聚酯膜的第三层;
作为粘合剂层的第四层;和
作为复合聚乙烯膜的第五层。
所述复合聚乙烯膜包含至少一个共挤出的聚乙烯层,所述至少一个共挤出的聚乙烯层夹在粘附于所述粘合剂层的至少一个聚乙烯膜与内聚乙烯膜之间。
所述复合聚乙烯膜可以进一步包括至少一个复合EVOH层,其中所述复合EVOH层包含夹在粘合树脂(tie)层间的EVOH。所述复合聚乙烯膜具有如下的结构:其使得所述复合EVOH层在两侧的所述粘合树脂层上被各自为至少一个共挤出的聚乙烯层的层夹持,并且所述复合EVOH层在两侧的所述共挤出的聚乙烯层上进一步被粘附于所述粘合剂层的至少一个聚乙烯膜与内聚乙烯膜夹持。
作为另选,可以进一步借助共挤出层压利用乙烯和乙烯醇的熔融共聚物(EVOH)、粘合树脂、LLDPE将粘合-层压的PET多层膜与聚乙烯膜进一步层压。该步骤中的共挤出层压以以下顺序进行:LLDPE/粘合树脂/EVOH/粘合树脂/LLDPE。虽然LLDPE可以用低密度聚乙烯(LDPE)或者LLDPE和LDPE的混合物代替,就可恢复性而言存在五层共挤出层压。两侧的粘合树脂层和LLDPE层的厚度可以相同或不同,但作为优选例,LLDPE层和粘合树脂层的厚度分别为15微米和10微米。
复合EVOH层包含夹在粘合树脂层间的EVOH,其中所述复合EVOH层在两侧的所述粘合树脂层上被各自为至少一个共挤出的聚乙烯层的层夹持。每一侧的共挤出的聚乙烯层的厚度可以为15微米至30微米,EVOH的厚度可以为10微米至30微米,且每一侧的粘合树脂层的厚度可以为10微米至20微米。
本发明中的粘合树脂层利用酸酐改性聚乙烯树脂、低密度聚乙烯树脂或含酸酐的线性低密度聚乙烯树脂。
挤出的LLDPE层可以由密度为0.85g/cc至0.92g/cc的聚乙烯树脂制成。
外聚乙烯膜或内聚乙烯膜可以是具有1至3层或更多层的吹塑膜。
外聚乙烯膜或内聚乙烯膜可以具柔性且包含注入高密度聚乙烯(HDPE)、线性低密度聚乙烯(LLDPE)或低密度聚乙烯(LDPE)等聚乙烯的混合物。
优选在约90微米至165微米范围内的内PE膜的厚度和在约45微米至70微米范围内的外PE膜的厚度。外膜和内膜通常是如三层膜等多层吹塑膜,以便获得如半透明、韧性、刚性和密封能力等多层膜性能。具有多层吹塑膜的内膜通常用于获得诸如韧性、热密封性能等各种特性。
聚对苯二甲酸乙二酯(PET)膜通常可为非晶聚酯(APET)膜或取向聚酯(BOPET)膜。基底膜的厚度可以为10微米至25微米。
本发明中的EVOH利用了具有27%至48%的乙烯含量的乙烯-乙二醇共聚物。挤出的EVOH层的厚度可以为5微米至30微米。
共挤出的聚乙烯层可以选自由挤出的LLDPE层、挤出的LDPE层及其混合物组成的组,且厚度可以为15微米至30微米。
在本发明的另一个实施方式中,其涉及具有包含以下的结构的层压体:
作为外聚乙烯膜的第一层;
作为粘合剂层的第二层;
作为聚酯膜的第三层;
作为粘合剂层的第四层;和
作为复合聚乙烯膜的第五层,
其中,如上所述的层压体可以进一步包含具有如下结构的复合聚酯膜:
作为聚乙烯膜的层I;
作为共挤出的聚乙烯层的层II;
作为金属化聚酯膜的层III;和
作为粘合剂层的层IV,
其中,所述复合聚酯膜安置在所述第四层和所述第五层之间,从而层I粘附于所述第四层的粘合剂层。
所述复合聚乙烯膜包含至少一个共挤出的聚乙烯层,所述至少一个共挤出的聚乙烯层夹在粘附于粘合剂层的至少一个聚乙烯膜与内聚乙烯膜之间,其中,内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜的厚度分别为90微米至165微米、120微米至140微米和45微米至65微米。
所述金属化聚酯膜的厚度为10微米至25微米。所述共挤出的聚酯层的厚度为15微米至80微米。
所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜可以是单层膜、三层膜或多层膜。
所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜可以选自由LDPE、LLDPE、HDPE及其混合物组成的组。
所述粘合剂可以为双组分聚氨酯。所述聚酯膜可以为聚对苯二甲酸乙二酯(PET)膜,优选为非晶聚酯(APET)膜或取向聚酯(BOPET)膜。作为聚酯膜的所述第三层可以是印刷的。所述共挤出的聚乙烯层可以选自由挤出的LLDPE层、挤出的LDPE层及其混合物组成的组,且厚度可以为12微米至20微米。
在本发明的另一个实施方式中,其涉及具有包含以下的结构的层压体:
作为外聚乙烯膜的第一层;
作为粘合剂层的第二层;
作为聚酯膜的第三层;
作为粘合剂层的第四层;和
作为复合聚乙烯膜的第五层。
所述复合聚乙烯膜包含至少一个共挤出的聚乙烯层,所述至少一个共挤出的聚乙烯层夹在粘附于粘合剂层的至少一个聚乙烯膜与内聚乙烯膜之间。
所述复合聚乙烯膜可以进一步包含至少一个复合EVOH层,其中所述复合EVOH层包含夹在粘合树脂层间的EVOH。所述复合聚乙烯膜具有如下的结构:其使得所述复合EVOH层在两侧的所述粘合树脂层上被各自为至少一个共挤出的聚乙烯层的层夹持,并且所述复合EVOH层在两侧的所述共挤出的聚乙烯层上进一步被粘附于粘合剂层的至少一个聚乙烯膜与内聚乙烯膜夹持。
如上所述的层压体可以进一步包含具有如下结构的复合聚酯膜:
作为聚乙烯膜的层I;
作为共挤出的聚乙烯层的层II;
作为金属化聚酯膜的层III;和
作为粘合剂层的层IV,
其中,所述复合聚酯膜安置在所述第四层和所述第五层之间,从而层I粘附于所述第四层的粘合剂层。
所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜的厚度可以分别为90微米至120微米、40微米至60微米和40微米至60微米。
复合EVOH层包含厚度为10微米至30微米的EVOH,且每一侧的粘合树脂层的厚度为10微米至20微米。
粘合树脂层选自由酸酐改性聚乙烯树脂、低密度聚乙烯树脂和含有酸酐的线性低密度聚乙烯树脂组成的组。
金属化聚酯膜的厚度为10微米至25微米。共挤出的聚乙烯层的厚度为15微米至80微米。内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜是单层膜、三层膜或多层膜。
内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及外聚乙烯膜选自由LDPE、LLDPE、HDPE及其混合物组成的组。
粘合剂是双组分聚氨酯。聚酯膜是聚对苯二甲酸乙二酯(PET)膜,优选为非晶聚酯(APET)膜或取向聚酯(BOPET)膜。作为聚酯膜的所述第三层是印刷的。共挤出的聚乙烯层选自由挤出的LLDPE层、挤出的LDPE层及其混合物组成的组,且厚度为12微米至20微米。
金属化聚酯膜可以通过在厚度为10微米至25微米的由聚对苯二甲酸乙二酯(PET)制成的基底膜上蒸发金属、金属氧化物或无机物质来获得。此外,采用铝、铬或氧化铝作为用于蒸发涂布的金属、金属氧化物或无机物质。其可经由任何可利用的已知方法(例如,真空沉积、离子镀、溅射和等离子体沉积等)气相沉积在基底膜上。可以提供在金属化前的化学处理,以改善金属和PET之间的键合或所谓的“金属粘合”。
以下部分通过实施例的方式详细地说明本发明,然而不应认为本发明受这些说明性实施例的限制。
实施例1.KPL-PET-01:
外PE膜70/干/印刷PET 12/Dry/PE膜140/LLex.65/内PE膜110
采用厚度为12微米的直接/背面印刷的聚酯膜(BOPET)作为基板以形成多层塑料板。该PET膜在一侧上与聚乙烯膜(140微米)干层压,然后在另一侧上与外聚乙烯膜(70微米)进一步干层压。该工艺中使用的粘合剂为氨基甲酸酯类粘合剂。粘合剂的涂布重量为约4g/m2至5g/m2。其后,将该层压膜用热熔融LLDPE树脂通过挤出层压而与内聚乙烯膜(110微米)进一步层压。最后,在层压板顶部涂布常规抗刮擦清漆。
实施例2.KPL-PET-02:
外PE膜70/干印刷PET 12/干/PE膜140/LLex.15/粘合树脂10/EV 15/粘合树脂10/LLex.15/内PE膜110
采用厚度为12微米的直接/背面印刷的聚酯膜(BOPET)作为基板以形成多层塑料板。该PET膜在一侧上与聚乙烯膜(140微米)干层压,然后在另一侧上与外聚乙烯膜(70微米)进一步干层压。该工艺中使用的粘合剂为氨基甲酸酯类粘合剂。粘合剂的涂布重量为约4g/m2至5g/m2。其后,将该层压膜用热熔融LLDPE树脂、粘合树脂和EVOH通过挤出层压而与内聚乙烯膜(110微米)进一步层压。最后,在层压板顶部涂布常规抗刮擦清漆。
实施例3.KPL-PET-03:
外PE膜55/干PET膜12/印刷/干/PE膜40/LLex.65/mPET膜12/干/PE膜40/LLex.15/粘合树脂10/EVOH 15/粘合树脂10/LLex.15/内PE膜90
采用厚度为12微米的直接/背面印刷的聚酯膜(BOPET)作为基板以形成多层塑料板。该PET膜在一侧上与聚乙烯膜(40微米)干层压,然后在另一侧上与外聚乙烯膜(55微米)进一步干层压。该工艺中使用的粘合剂为氨基甲酸酯类粘合剂。粘合剂的涂布重量为约4g/m2至5g/m2。使用金属化聚酯膜(mPET,12微米)以便增强印刷装饰的光泽效果。
该金属化聚酯膜与聚乙烯膜(40微米)干层压。其后,将该金属化聚酯膜用热熔融LLDPE树脂、粘合树脂和EVOH通过挤出层压而与内聚乙烯膜(90微米)进一步层压,然后采用热熔融LLDPE树脂通过挤出层压将金属化聚酯层压体部分与聚酯层压体部分进一步层压。最后,在层压板顶部涂布常规抗刮擦清漆。
表1
根据表1,分别根据ASTM D3985和ASTM F1249评估氧透过率(OTR)和水气透过率(WVTR)。KPL-PET-01具有比PET/EVOH层压板更高的氧透过率(更低的阻挡)。该特征通过PET膜自身的阻挡性质可能正变得广为人知。KPL-PET-01可以用于制造半透明层压管的主体。具有与EVOH挤出层压的KPL-PET-02展示出比KPL-PET-01高得多的阻挡性(更低的OTR值)。KPL-PET-02可能适于增加阻挡以便用于敏感性糊体产品。在KPL-PET-03的情形中,OTR和WVTR与KPL-PET-02几乎相当。添加金属化PET膜是为了增强层压板的光泽效果。所述层压管理想地配用于液体或糊体产品的低氧敏感性包装。
Claims (30)
1.一种具有下述层结构的层压体:
作为外聚乙烯膜的第一层;
作为粘合剂层的第二层;
作为聚酯膜的第三层;
作为粘合剂层的第四层;和
作为复合聚乙烯膜的第五层,
其中,所述复合聚乙烯膜包含至少一个共挤出的聚乙烯层,所述至少一个共挤出的聚乙烯层夹在粘附于所述粘合剂层的至少一个聚乙烯膜与内聚乙烯膜之间。
2.如权利要求1所述的层压体,其中,所述复合聚乙烯膜进一步包含至少一个复合EVOH层,其中:所述复合EVOH层包含夹在粘合树脂层间的EVOH;并且所述复合聚乙烯膜具有如下的结构:其使得所述复合EVOH层在两侧的所述粘合树脂层上被各自为至少一个共挤出的聚乙烯层的层夹持,并且所述复合EVOH层在两侧的所述共挤出的聚乙烯层上进一步被粘附于所述粘合剂层的至少一个聚乙烯膜与内聚乙烯膜夹持。
3.如权利要求1或2所述的层压体,其中,所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及所述外聚乙烯膜是单层膜、三层膜或多层膜。
4.如权利要求1至3中任一项所述的层压体,其中,所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及所述外聚乙烯膜选自由LDPE、LLDPE、HDPE及其混合物组成的组。
5.如权利要求1至4中任一项所述的层压体,其中,所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及所述外聚乙烯膜的厚度分别为90微米至165微米、120微米至140微米和45微米至65微米。
6.如前述权利要求中任一项所述的层压体,其中,所述粘合剂是双组分聚氨酯。
7.如前述权利要求中任一项所述的层压体,其中,所述聚酯膜是聚对苯二甲酸乙二酯(PET)膜,优选为非晶聚酯(APET)膜或取向聚酯(BOPET)膜。
8.如前述权利要求中任一项所述的层压体,其中,所述聚酯膜的厚度为12微米至20微米。
9.如前述权利要求中任一项所述的层压体,其中,所述聚酯膜是印刷的。
10.如前述权利要求中任一项所述的层压体,其中,所述共挤出的聚乙烯层选自由挤出的LLDPE层、挤出的LDPE层及其混合物组成的组。
11.如权利要求1所述的层压体,其中,所述共挤出的聚乙烯层的厚度为15微米至80微米。
12.如权利要求2所述的层压体,其中,每一侧的所述共挤出的聚乙烯层的厚度为15微米至30微米。
13.如权利要求12所述的层压体,其中,所述复合EVOH层包含厚度为10微米至30微米的EVOH,且每一侧的所述粘合树脂层的厚度为10微米至20微米。
14.如权利要求2或13所述的层压体,其中,所述粘合树脂选自由酸酐改性聚乙烯树脂、低密度聚乙烯树脂和含有酸酐的线性低密度聚乙烯树脂组成的组。
15.如权利要求1所述的层压体,所述层压体进一步包含具有以下结构的复合聚酯膜:
作为聚乙烯膜的层I;
作为共挤出的聚乙烯层的层II;
作为金属化聚酯膜的层III;和
作为粘合剂层的层IV,
其中,所述复合聚酯膜安置在所述第四层和所述第五层之间,从而层I粘附于所述第四层的粘合剂层。
16.如权利要求2所述的层压体,所述层压体进一步包含具有以下结构的复合聚酯膜:
作为聚乙烯膜的层I;
作为共挤出的聚乙烯层的层II;
作为金属化聚酯膜的层III;和
作为粘合剂层的层IV,
其中,所述复合聚酯膜安置在所述第四层和所述第五层之间,从而层I粘附于所述第四层的粘合剂层。
17.如权利要求15所述的层压体,其中,所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及所述外聚乙烯膜的厚度分别为90微米至165微米、120微米至140微米和45微米至65微米。
18.如权利要求16所述的层压体,其中,所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及所述外聚乙烯膜的厚度分别为90微米至120微米、40微米至60微米和40微米至60微米。
19.如权利要求16或18所述的层压体,其中,所述复合EVOH层包含厚度为10微米至30微米的EVOH,且每一侧的所述粘合树脂层的厚度为10微米至20微米。
20.如权利要求16、18和19中任一项所述的层压体,其中,所述粘合树脂选自由酸酐改性聚乙烯树脂、低密度聚乙烯树脂和含有酸酐的线性低密度聚乙烯树脂组成的组。
21.如权利要求15至20中任一项所述的层压体,其中,所述金属化聚酯膜的厚度为10微米至25微米。
22.如权利要求15至21中任一项所述的层压体,其中,所述共挤出的聚乙烯层的厚度为15微米至80微米。
23.如权利要求15至22中任一项所述的层压体,其中,所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及所述外聚乙烯膜是单层膜、三层膜或多层膜。
24.如权利要求15至23中任一项所述的层压体,其中,所述内聚乙烯膜、粘附于所述粘合剂层的聚乙烯膜以及所述外聚乙烯膜选自由LDPE、LLDPE、HDPE及其混合物组成的组。
25.如权利要求15至24中任一项所述的层压体,其中,所述粘合剂是双组分聚氨酯。
26.如权利要求15至25中任一项所述的层压体,其中,所述聚酯膜是聚对苯二甲酸乙二酯(PET)膜,优选为非晶聚酯(APET)膜或取向聚酯(BOPET)膜。
27.如权利要求15至26中任一项所述的层压体,其中,作为聚酯膜的所述第三层是印刷的。
28.如权利要求15至27中任一项所述的层压体,其中,所述共挤出的聚乙烯层选自由挤出的LLDPE层、挤出的LDPE层及其混合物组成的组。
29.如权利要求15至28中任一项所述的层压体,其中,所述聚酯膜的厚度为12微米至20微米。
30.一种管容器,其由权利要求1至29中任一项所述的层压体制造。
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WO2022216239A1 (en) * | 2021-04-05 | 2022-10-13 | Kim Pack Co., Ltd. | Recycled and recyclable barrier laminate tube |
CN115179628A (zh) * | 2022-05-31 | 2022-10-14 | 江阴宝柏新型包装材料有限公司 | 一种高强度耐腐蚀铝塑片材及其制备方法 |
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