CN107521160A - 一种用于灌装油类及芳香族化合物膏体的复合管材及工艺 - Google Patents
一种用于灌装油类及芳香族化合物膏体的复合管材及工艺 Download PDFInfo
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Abstract
本发明涉及复合管材技术领域，具体涉及一种用于灌装油类及芳香族化合物膏体的复合管材及工艺。用于灌装油类及芳香族化合物膏体的复合管材包括外层复合薄膜组、中间层铝箔、内层复合薄膜组，在所述外层复合薄膜组与中间层铝箔之间设有铝箔外粘合层，在所述中间层铝箔与内层复合薄膜组之间设有铝箔内粘合层；所述外层复合薄膜组为三层结构的复合膜，所述内层复合薄膜组为七层结构的复合膜。本发明的一种用于灌装油类及芳香族化合物膏体的复合管材，克服了传统金属管在卷管及尾封时设备维护成本高、传统复合管阻隔性差的弊端。
Description
技术领域
本发明涉及复合管材技术领域，具体涉及一种用于灌装油类及芳香族化合物膏体的复合管材及工艺。
背景技术
目前对于油类及芳香族化合物膏体的灌装，大多是使用挤出复合管、铁管、锡管或铝皮管进行灌装，通过内壁涂覆具有高阻隔性类的聚氨酯涂层，来高效保护内容物。
但是，采用现有技术的挤出复合管灌装油类及芳香族化合物等工业级别内容物时，由于内容物中的小分子物质出现迁移现象，导致粘结层材料易被侵蚀，导致复合管容易出现被侵蚀分层的弊端。而采用铁管、锡管或铝皮管等金属管进行灌装时，由于金属管的制作流程工艺繁琐复杂，工艺的稳定性较差，特别在膏体灌装尾封工艺上，需在金属外表面的管尾涂覆胶水，但实际生产过程中常出现堵胶、漏胶等严重影响生产稳定性。同时，金属管卷尾封尾装置对设备损伤大，需要维护人员高效率技术支持才可保证机器运转。因此，需要开发一种具有高阻隔性的多层复合型管材，以解决此类问题。
发明内容
针对上述现有技术中出现的问题，本发明提出一种用于灌装油类及芳香族化合物膏体的复合管材及工艺，以克服传统金属管在卷管及尾封时设备维护成本高，现场工艺及操作复杂性的现象。具体的技术方案如下：
一种用于灌装油类及芳香族化合物膏体的复合管材，包括外层复合薄膜组、中间层铝箔、内层复合薄膜组，在所述外层复合薄膜组与中间层铝箔之间设有铝箔外粘合层，在所述中间层铝箔与内层复合薄膜组之间设有铝箔内粘合层；所述外层复合薄膜组为三层结构的复合膜，所述三层结构的复合膜按照所述复合管材从外向内的方向包括WPE共混改性聚乙烯薄膜层、LDPE低密度聚乙烯薄膜层、PE改性聚乙烯薄膜层；所述内层复合薄膜组为七层结构的复合膜，所述七层结构的复合膜按照所述复合管材从外向内的方向包括LDPE低密度聚乙烯薄膜层、PE改性聚乙烯薄膜层、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层、PE聚乙烯基体的MHA马来酸酐粘结层、EVOH乙烯-乙烯醇共聚物薄膜层、PE聚乙烯基体的MHA马来酸酐粘结层、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层。
上述技术方案中，通过内层添加具有可分解出游离氢离子的高阻隔性能的EVOH乙烯-乙烯醇共聚物材质，提升材料的阻隔性能，以解决分层问题。由于EVOH中的聚乙烯醇基团的游离氢离子，可提供优异的色散力、极性力、氢键，在非晶型区域，通过分子键内自身的氢键链合结构，把非晶区和晶区络合成为完美的网状式交联结构，再通过错位式多层复合，极大提升材料的阻隔性能，防止芳胺类的小分子物质进入粘结层，达到有效保护工业级别内容物的目的。EVOH将乙烯聚合物的加工性和乙烯醇聚合物的阻隔作用相结合，EVOH乙烯‐乙烯醇共聚物不仅表现出极好的加工性能，而且也对气体、气味、香料、溶剂等呈现出优异的阻断作用。
另外，通过多层复合的效果，可彻底替代金属管材，解决金属管材在卷管、尾封等工艺常见漏胶、卡管、印刷不良等工艺问题。
本技术方案中，所述WPE共混改性聚乙烯薄膜层为添加了色母粒料的HDPE高密度聚乙烯与MLLDPE茂金属聚乙烯共混聚乙烯薄膜层。HDPE高密度聚乙烯与MLLDPE茂金属聚乙烯的共混增加了薄膜的强度。
所述SPE改性聚乙烯薄膜层为添加了丙烯酸AA的改性聚乙烯薄膜层，所述SPE改性聚乙烯薄膜层的复合材料中其聚烯烃的组份按照重量百分比其含量为64.2％的LDPE成分，29.9％的改性PE成分再加5.9％的AA成分。
上述技术方案中，内层改性聚乙烯薄膜层由多种材质共混而成，其中EVOH的加入能够增强内层PE的阻隔性能，特别是增强了对于挥发物质的阻隔作用。
为了使得外层复合薄膜组、中间层铝箔、内层复合薄膜组之间实现较好的粘结，所述铝箔外粘合层、铝箔内粘合层的材料为丙烯酸接枝聚乙烯类的改性树脂。
所述EVOH乙烯-乙烯醇共聚物薄膜层中按照重量百分比添加有20％聚乙烯醇改性的聚乙烯、其中内部具有阻抗作用的有效成份为14.3％的接枝聚乙烯醇的改性聚乙烯树脂。
上述技术方案中，在EVOH乙烯-乙烯醇共聚物薄膜层中添加接枝聚乙烯醇的改性聚乙烯树脂，提高了对于挥发性物质的阻隔作用。
一种制作上述用于灌装油类及芳香族化合物膏体的复合管材的工艺，包括如下工艺步骤：
步骤1、采用三层共挤吹塑设备制备具有双向拉伸取向的外层复合薄膜组，经切片分边后制得外层复合薄膜组的薄膜；
步骤2、采用七层共挤吹塑设备制备具有双向拉伸取向的内层复合薄膜组，经切片后制得内层复合薄膜组的薄膜；
步骤3、采用层压复合设备将外层复合薄膜组的薄膜、中间层铝箔、内层复合薄膜组的薄膜，通过在层间涂布丙烯酸接枝聚乙烯类的改性树脂并进行层压复合，制得用于灌装油类及芳香族化合物膏体的复合管材的片材；
步骤4、采用卷管设备，将制得的用于灌装油类及芳香族化合物膏体的复合管材的片材卷制成管材；
步骤5、采用超声波高频焊接设备，在卷制成管材的拼接处进行热融合，制得用于灌装油类及芳香族化合物膏体的复合管材。
上述制作工艺中，外层复合薄膜组、内层复合薄膜组采用多层共挤吹塑工艺制得，目的是提高薄膜的综合性能。薄膜原料经过多层共挤吹塑，后经过展平辊，橡胶辊，排气辊，切分边装置，获取拥有纵向和横向拉伸的吹塑薄膜，其结晶度大于常规挤出型管材。采用吹塑工艺的优点在于，在吹膜过程中，高分子原材料在取向条件下自身易结晶的材料特性，通过吹膜的纵横取向获取拉伸强度可获得高质量分数的结晶度，通过空间位阻特有的结构特性，建立起规整的晶区类型。由于EVOH中的聚乙烯醇基团的游离氢离子，可提供优异的色散力、极性力、氢键，在非晶型区域，通过分子键内自身的氢键链合结构，把非晶区和晶区络合成为完美的网状式交联结构，再通过错位式多层复合结构，极大提升材料的阻隔性能，防止芳胺类的小分子物质进入粘结层，有效保护工业级别内容物。
本发明的有益效果是：
第一、本发明的一种用于灌装油类及芳香族化合物膏体的复合管材，通过内层添加具有可分解出游离氢离子的高阻隔性能的EVOH材质，提升材料的阻隔性能，解决小分子物质易透过内层进入粘结层导致分层问题。
第二、本发明的一种用于灌装油类及芳香族化合物膏体的复合管材，内层材料使用含有20％聚乙烯醇改性的聚乙烯作为高效阻隔性层，有效阻挡小分子物质，大幅度提升整体材料的保香、保湿、气体阻隔性。SPE改性聚乙烯薄膜层由多种材质共混而成，特别是增强了对于铝层与薄膜组之间的层间的复合剥离强度
第三、本发明的一种用于灌装油类及芳香族化合物膏体的复合管材，通过内膜添加具有高阻隔性能的EVOH材质，大幅度提升材料对小分子迁移的阻隔作用，小分子类的迁移物质包括芳香族/胺族/脲族类的物质，能彻底的解决传统性复合级管材内层薄膜对此类物质的低阻隔能力，提高内容物的保存周期，防止因管材问题，出现分层现象，产品内容物性能散失。
第四、本发明的一种用于灌装油类及芳香族化合物膏体的复合管材，在阻水数量级方面，通过铝箔与EVOH薄膜的层片式叠加方法，大幅度的提升整体复合材料的阻水阻氧效果，显著延长工业级别内容物的保质期。
第五、外层复合薄膜组、内层复合薄膜组采用多层共挤吹塑工艺制得，薄膜具有双向拉伸取向，从而提高了提高薄膜的综合性能。
附图说明
图1是本发明的一种用于灌装油类及芳香族化合物膏体的复合管材的结构示意图；
图中：10、外层复合薄膜组，11、WPE共混改性聚乙烯薄膜层、12、LDPE低密度聚乙烯薄膜层、13、PE改性聚乙烯薄膜层
图中：20、铝箔外粘合层；
图中：30、中间层铝箔；
图中：40、铝箔内粘合层；
图中：50、内层复合薄膜组、51、LDPE低密度聚乙烯薄膜层、52、PE改性聚乙烯薄膜层、53、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层、54、PE聚乙烯基体的MHA马来酸酐粘结层、55、EVOH乙烯-乙烯醇共聚物薄膜层、56、PE聚乙烯基体的MHA马来酸酐粘结层、57、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
实施例1：
如图1为一种用于灌装油类及芳香族化合物膏体的复合管材，包括外层复合薄膜组10、中间层铝箔30、内层复合薄膜组50，在所述外层复合薄膜组10与中间层铝箔30之间设有铝箔外粘合层20，在所述中间层铝箔30与内层复合薄膜组50之间设有铝箔内粘合层40；所述外层复合薄膜组10为三层结构的复合膜，所述三层结构的复合膜按照所述复合管材从外向内的方向包括WPE共混改性聚乙烯薄膜层11、LDPE低密度聚乙烯薄膜层12、PE改性聚乙烯薄膜层13；所述内层复合薄膜组50为七层结构的复合膜，所述七层结构的复合膜按照所述复合管材从外向内的方向包括LDPE低密度聚乙烯薄膜层51、PE改性聚乙烯薄膜层52、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层53、PE聚乙烯基体的MHA马来酸酐粘结层54、EVOH乙烯-乙烯醇共聚物薄膜层55、PE聚乙烯基体的MHA马来酸酐粘结层56、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层57。
本实施例中，所述WPE共混改性聚乙烯薄膜层11为添加了色母粒料的HDPE高密度聚乙烯与MLLDPE茂金属聚乙烯共混聚乙烯薄膜层。
所述SPE改性聚乙烯薄膜层为添加了丙烯酸(AA)的改性聚乙烯薄膜层，所述SPE改性聚乙烯薄膜层的复合材料中其聚烯烃的组份按照重量百分比其含量为64.2％的LDPE成分，29.9％的改性PE成分再加5.9％的AA成分
本实施例中，所述铝箔外粘合层20、铝箔内粘合层40的材料为丙烯酸接枝聚乙烯类的改性树脂。
本实施例中，所述EVOH乙烯-乙烯醇共聚物薄膜层55中按照重量百分比添加有20％聚乙烯醇改性的聚乙烯、14.3％的接枝聚乙烯醇的改性聚乙烯树脂。
实施例2：
一种制作上述用于灌装油类及芳香族化合物膏体的复合管材的工艺，包括如下工艺步骤：
步骤1、采用三层共挤吹塑设备制备具有双向拉伸取向的外层复合薄膜组，经切片后制得外层复合薄膜组的薄膜；
步骤2、采用七层共挤吹塑设备制备具有双向拉伸取向的内层复合薄膜组，经切片后制得内层复合薄膜组的薄膜；
步骤3、采用层压复合设备将外层复合薄膜组的薄膜、中间层铝箔、内层复合薄膜组的薄膜，通过在层间涂布丙烯酸接枝聚乙烯类的改性树脂并进行层压复合，制得用于灌装油类及芳香族化合物膏体的复合管材的片材；
步骤4、采用卷管设备，将制得的用于灌装油类及芳香族化合物膏体的复合管材的片材卷制成管材；
步骤5、采用超声波高频焊接设备，在卷制成管材的拼接处进行热融合，制得用于灌装油类及芳香族化合物膏体的复合管材。
本实施例中，所述三层共挤吹塑设备、七层共挤吹塑设备中所使用的压缩机采用三螺杆挤出机，经过长径比为18:1的插销式的屏障螺杆装置，通过倾斜式的螺杆设计，窄的螺杆间隙，双向对流控温装置，熔炼热塑性熔体，后经过层叠式模头汇集至模头，经过展平辊，橡胶辊，排气辊，切分边装置，获取拥有纵向和横向拉伸的吹塑薄膜，其结晶度大于常规挤出型管材。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
Claims (6)
1.一种用于灌装油类及芳香族化合物膏体的复合管材，包括外层复合薄膜组、中间层铝箔、内层复合薄膜组，在所述外层复合薄膜组与中间层铝箔之间设有铝箔外粘合层，在所述中间层铝箔与内层复合薄膜组之间设有铝箔内粘合层；所述外层复合薄膜组为三层结构的复合膜，所述三层结构的复合膜按照所述复合管材从外向内的方向包括WPE共混改性聚乙烯薄膜层、LDPE低密度聚乙烯薄膜层、PE改性聚乙烯薄膜层；所述内层复合薄膜组为七层结构的复合膜，所述七层结构的复合膜按照所述复合管材从外向内的方向包括LDPE低密度聚乙烯薄膜层、PE改性聚乙烯薄膜层、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层、PE聚乙烯基体的MHA马来酸酐粘结层、EVOH乙烯-乙烯醇共聚物薄膜层、PE聚乙烯基体的MHA马来酸酐粘结层、LLDPE线性低密度聚乙烯与MLLDPE茂金属聚乙烯共混改性薄膜层。
2.根据权利要求1所述的一种用于灌装油类及芳香族化合物膏体的复合管材，其特征是：所述WPE共混改性聚乙烯薄膜层为添加了色母粒料的HDPE高密度聚乙烯与MLLDPE茂金属聚乙烯共混聚乙烯薄膜层。
3.根据权利要求1所述的一种用于灌装油类及芳香族化合物膏体的复合管材，其特征是：所述SPE改性聚乙烯薄膜层为添加了AA丙烯酸的改性聚乙烯薄膜层。
4.根据权利要求1所述的一种用于灌装油类及芳香族化合物膏体的复合管材，其特征是：所述铝箔外粘合层、铝箔内粘合层的材料为丙烯酸接枝聚乙烯类的改性树脂。
5.根据权利要求1所述的一种用于灌装油类及芳香族化合物膏体的复合管材，其特征是：所述EVOH乙烯-乙烯醇共聚物薄膜层中按照重量百分比添加有20％聚乙烯醇改性的聚乙烯、有效成份为14.3％的接枝聚乙烯醇的改性聚乙烯树脂。
6.一种制作如权利要求1至5中任一项所述的用于灌装油类及芳香族化合物膏体的复合管材的工艺，其特征是包括如下工艺步骤：
步骤1、采用三层共挤吹塑设备制备具有双向拉伸取向的外层复合薄膜组，经切片后制得外层复合薄膜组的薄膜；
步骤2、采用七层共挤吹塑设备制备具有双向拉伸取向的内层复合薄膜组，经切片后制得内层复合薄膜组的薄膜；
步骤3、采用层压复合设备将外层复合薄膜组的薄膜、中间层铝箔、内层复合薄膜组的薄膜，通过在层间涂覆丙烯酸接枝聚乙烯类的改性树脂并进行层压复合，制得用于灌装油类及芳香族化合物膏体的复合管材的片材；
步骤4、采用卷管设备，将制得的用于灌装油类及芳香族化合物膏体的复合片材卷制成管材；
步骤5、采用超声波高频焊接设备，在卷制成管材的拼接处进行热融合，制得用于灌装油类及芳香族化合物膏体的复合管材。
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| CN114347604A (zh) * | 2021-12-07 | 2022-04-15 | 江阴宝柏新型包装材料有限公司临港分公司 | 一种优异耐腐蚀片材及其制备方法 |
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