CN112895613A - 一种耐用性高的可微波用pp淋膜纸 - Google Patents
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Abstract
本申请涉及一种耐用性高的可微波用PP淋膜纸,其包括增强复合纸芯,增强复合纸芯的两侧外层分别设有淋膜层,淋膜层为PP淋膜层,PP淋膜层由包含以下重量份的原料制备而成:聚丙烯120‑150份、疏水性气相二氧化硅8‑12份、马来酸酐接枝聚丙烯0.1‑0.15份、抗热氧化剂0.4‑0.6份、抗紫外线剂0.1‑0.3份。增强复合纸芯包括第一芯层和第二芯层,第一芯层包括第一基材层、固定连接于第一基材层内侧面的第一内撑层,第二芯层包括第二基材层、固定连接于第二基材层靠近第一基材层一侧面的第二内撑层,第一内撑层与第二内撑层粘接压合连接。本申请的淋膜纸具有微波耐热性高、纸品强度大、耐久性好的优点。
Description
技术领域
本申请涉及淋膜纸技术领域,尤其是涉及一种耐用性高的可微波用PP淋膜纸。
背景技术
淋膜纸是指将塑料粒子通过流延机涂覆在纸张表面形成的复合用纸,其主要特点是具备一定的防油、防水性能,可以热合。目前市售的一次性纸杯、纸碗、纸餐盒等纸质容器也都采用淋膜纸制成,主要为低密度聚乙烯淋膜纸。
一方面,低密度聚乙烯淋膜纸虽然也具备较好的防油、防水性能,能够用于包装、储存食品等。但当需要对食品进行微波加热时,该类纸质容器的聚乙烯涂层容易出现热熔现象,导致纸容器渗漏;另一方面,目前的淋膜纸大多是通过在单层的基材或者原纸层外侧设置高分子淋膜层,然后压合形成淋膜纸成品用纸。
针对上述中的相关技术,发明人认为目前的淋膜纸产品的淋膜层耐热熔性较差,且单层基材或原纸的设计结构容易导致成品纸的强度降低、耐用性较差,有待进一步改进。
发明内容
为了提高可用于微波加热淋膜纸的耐热熔性、纸品强度,延长淋膜纸的耐用性,本申请提供一种耐用性高的可微波用PP淋膜纸。
本申请提供的一种耐用性高的可微波用PP淋膜纸采用如下的技术方案:
一种耐用性高的可微波用PP淋膜纸,包括增强复合纸芯,所述增强复合纸芯的两侧外层分别设置有淋膜层,所述淋膜层为PP淋膜层;所述增强复合纸芯包括相互配合的第一芯层和第二芯层,所述第一芯层包括第一基材层、固定连接于第一基材层内侧面的第一内撑层,所述第二芯层包括第二基材层、固定连接于第二基材层靠近第一基材层一侧面的第二内撑层,所述第一内撑层与第二内撑层粘接压合连接。
通过采用上述技术方案,第一内撑层与第一基材层结合,提高了第一芯层的强度和耐久性,第二内撑层与第二基材层结合,提高了第二芯层的强度和耐久性,再通过粘接压合将第一芯层与第二芯层配合连接,形成增强复合纸芯,从而有效提高成品淋膜纸的综合强度和耐用性;采用PP(聚丙烯)膜层作为淋膜层,充分利用了聚丙烯良好耐热性,有效提高了淋膜层微波加热时的耐热熔性,同时聚丙烯具有高化学稳定性,防水性好,耐酸碱,进一步提高了淋膜纸的使用寿命。
可选的,所述第一内撑层与第二内撑层均设置为波纹纸层,所述第一内撑层包括若干连续的第一波峰和第一波谷,所述第二内撑层包括若干连续的第二波峰和第二波谷,所述第一波峰与第二波谷粘接、第一波谷与第二波峰粘接。
通过采用上述技术方案,将第一内撑层、第二内撑层设置为波纹纸层,并通过第一波峰与第二波谷粘接、第一波谷与第二波峰粘接,使得第一内撑层与第二内撑层之间形成多个相互抵接的拱形支撑结构,从而显著增加第一芯层与第二芯层之间的连接和支撑强度。
可选的,所述第一内撑层与第二内撑层对称设置,且所述第一波峰与第二波峰的高度相同。
通过采用上述技术方案,将第一内撑层与第二内撑层对称设置,使得第一内撑层与第二内撑层粘接压合时接触结构受力均匀,有助于提高增强复合纸芯的结构稳定性。将第一波峰与第二波峰的高度设置相同,可以使得第一内撑层与第二内撑层之间形成的拱形支撑结构保持一致,进一步提高支撑稳定性和支撑强度。
可选的,所述第一内撑层、第二内撑层的表面分别开设有增强连接微孔。
通过采用上述技术方案,开设增强连接微孔,可以增大胶水分别与第一内撑层、第二内撑层粘接时的接触面积,同时也有助于提高第一内撑层、第二内撑层之间的接触摩擦系数,从而进一步提高第一内撑层、第二内撑层之间的粘接牢度。
可选的,所述第一内撑层与第一基材层之间设置有环保纸浆填充层,所述第二内撑层与第二基材层之间也设置有环保纸浆填充层。
通过采用上述技术方案,分别在第一内撑层与第一基材层之间、第二内撑层与第二基材层之间填充环保纸浆填充层,可以进一步提高第一内撑层、第二内撑层的内撑强度,同时通过环保纸浆填充层也能够进一步提高第一芯层、第二芯层的使用强度,从而进一步提升成品淋膜纸的耐用性能。
可选的,所述增强复合纸芯的内侧淋膜层外表面涂设有环保型拒水防油层。
通过采用上述技术方案,增强复合纸芯的内侧淋膜层是靠近承载空间的一侧,有更高的防水防油的需求,通过在内侧淋膜层外表面涂设环保型拒水防油层,可以进一步提高淋膜纸的防水防油效果,从而进一步提升淋膜纸产品在微波加热使用场景下的适应性和耐久性。
可选的,所述环保型拒水防油层为聚四氟乙烯涂层。
通过采用上述技术方案,聚四氟乙烯具有优异的化学稳定性、耐高温、耐腐蚀,高润滑不粘性和抗老化性,且无毒、无味,作为环保型拒水防油层使用可以有效提高淋膜纸的防水防油性能。
可选的,所述增强复合纸芯的外侧淋膜层外表面涂设有抗热老化涂层。
通过采用上述技术方案,长时间对淋膜纸制品进行微波加热,会导致淋膜纸的热老化加速,缩短产品只用寿命,通过涂设抗热老化涂层,可以进一步提升淋膜纸的耐热老化性能,延长其使用寿命。
可选的,所述抗热老化涂层为纳米陶瓷涂层。
通过采用上述技术方案,纳米陶瓷涂层具有高耐热性、高抗氧化性,且具有更优的涂覆韧性,作为抗热老化涂层能够显著提高淋膜纸的抗热老化性能,提升淋膜纸的耐用性。
可选的,所述PP淋膜层由包含以下重量份的原料制备而成:聚丙烯120-150份、疏水性气相二氧化硅8-12份、马来酸酐接枝聚丙烯0.1-0.15份、抗热氧化剂0.4-0.6份、抗紫外线剂0.1-0.3份。
通过采用上述技术方案,疏水性气相二氧化硅具有良好的疏水性,将其加入聚丙烯中能够起到改性作用,显著提高聚丙烯膜层的强度、延伸性以及耐磨性,并且有助于提高聚丙烯膜层的透明度;添加马来酸酐接枝聚丙烯,可以有效改善疏水性气相二氧化硅再聚丙烯中的分散性能,提高聚丙烯的改性均匀性和改性品质;抗热氧化剂有助于进一步提升聚丙烯膜层的耐热氧化性,进而提升淋膜纸的耐久性;抗紫外线剂有助于提高聚丙烯淋膜层的耐紫外线老化性能,进一步提升聚丙烯淋膜层的耐久性。
综上所述,本申请包括以下至少一种有益技术效果:
1.通过设置由第一芯层、第二芯层相互粘接压合形成的增强复合纸芯,从而有效提高成品淋膜纸的综合强度和耐用性;采用PP(聚丙烯)膜层作为淋膜层,充分利用了聚丙烯良好耐热性,有效提高了淋膜层微波加热时的耐热熔性,同时聚丙烯具有高化学稳定性,防水性好,耐酸碱,进一步提高了淋膜纸的使用寿命;
2.将第一内撑层、第二内撑层设置为波纹纸层,并通过第一波峰与第二波谷粘接、第一波谷与第二波峰粘接,使得第一内撑层与第二内撑层之间形成多个相互抵接的拱形支撑结构,从而显著增加第一芯层与第二芯层之间的连接和支撑强度;
3.分别在第一内撑层与第一基材层之间、第二内撑层与第二基材层之间填充环保纸浆填充层,可以进一步提高第一内撑层、第二内撑层的内撑强度,同时通过环保纸浆填充层也能够进一步提高第一芯层、第二芯层的使用强度,从而进一步提升成品淋膜纸的耐用性能;
4.疏水性气相二氧化硅具有良好的疏水性,将其加入聚丙烯中能够起到改性作用,显著提高聚丙烯膜层的强度、延伸性以及耐磨性,并且有助于提高聚丙烯膜层的透明度;添加马来酸酐接枝聚丙烯,可以有效改善疏水性气相二氧化硅再聚丙烯中的分散性能,提高聚丙烯的改性均匀性和改性品质;抗热氧化剂有助于进一步提升聚丙烯膜层的耐热氧化性,进而提升淋膜纸的耐久性。
附图说明
图1是本申请实施例1-7中一种耐用性高的可微波用PP淋膜纸的整体示意图。
图2是图1中A部分的局部放大图。
图3是本申请实施例1-7中一种耐用性高的可微波用PP淋膜纸的***图。
图4是图3中B部分的局部放大图。
附图标记说明:1、增强复合纸芯;10、PP淋膜层;11、第一芯层;111、第一基材层;112、第一内撑层;1121、第一波峰;1122、第一波谷;12、第二芯层;121、第二基材层;122、第二内撑层;1221、第二波峰;1222、第二波谷;13、增强连接微孔;14、环保纸浆填充层;15、环保型拒水防油层;16、抗热老化涂层。
具体实施方式
以下结合附图1-4对本申请作进一步详细说明。
实施例
本申请实施例公开一种耐用性高的可微波用PP淋膜纸。
实施例1
参照图1,一种耐用性高的可微波用PP淋膜纸,包括增强复合纸芯1,在增强复合纸芯1的两侧外层分别淋膜有PP淋膜层10。PP淋膜层10由包含以下重量份的原料制备而成:聚丙烯120份、疏水性气相二氧化硅8份、马来酸酐接枝聚丙烯0.1份、抗热氧化剂0.4份、抗紫外线剂0.1份。本申请实施例中的抗热氧化剂优选食品级抗氧剂BHT,抗紫外线剂优选二氧化钛。
参照图1和2,增强复合纸芯1包括第一芯层11和第二芯层12。第一芯层11包括第一基材层111,在第一基材层111靠近第二芯层12的一侧粘接固定有第一内撑层112;第二芯层12包括第二基材层121,在第二基材层121靠近第一芯层11方向的一侧粘接固定有第二内撑层122。
参照图3和4,在第一内撑层112与第二内撑层122的表面分别开设有若干增强连接微孔13,第一内撑层112与第二内撑层122通过粘接压合固定连接,开设增强连接微孔13,可以增加黏胶与第一内撑层112、第二内撑层122粘接时的接触面积,同时有助于提高第一内撑层112、第二内撑层122之间的接触摩擦系数,从而进一步提高第一内撑层112、第二内撑层122之间的粘接牢度。
参照图2和4,第一内撑层112与第二内撑层122呈对称设置,且第一内撑层112与第二内撑层122均设置为波纹纸层,第一内撑层112包括若干连续成型的第一波峰1121和第一波谷1122,第二内撑层122包括若干连续成型的第二波峰1221和第二波谷1222,第一波峰1121与第二波峰1221的高度相同。粘接压合时,第一波峰1121与第二波谷1222粘接、第一波谷1122与第二波峰1221粘接,从而实现第一内撑层112与第二内撑层122的粘接固定。
参照图2和4,第一内撑层112与第一基材层111之间填充有环保纸浆填充层14,第二内撑层122与第二基材层121之间也填充有环保纸浆填充层14,可以进一步提高第一内撑层112、第二内撑层122的内撑强度;同时通过环保纸浆填充层14也能够进一步提高第一芯层11、第二芯层12的使用强度,从而进一步提升成品淋膜纸的耐用性能。
参照图2,在增强复合纸芯1的内侧淋膜层外表面均匀涂覆有环保型拒水防油层15,本申请实施例中的环保型拒水防油层15优选聚四氟乙烯涂层。在增强复合纸芯1的外侧淋膜层外表面均匀涂覆有抗热老化涂层16,本申请实施例中的抗热老化涂层16优选纳米陶瓷涂层。
实施例2
一种耐用性高的可微波用PP淋膜纸,与实施例1的区别在于,PP淋膜层10由包含以下重量份的原料制备而成:聚丙烯120份、疏水性气相二氧化硅9份、马来酸酐接枝聚丙烯0.1份、抗热氧化剂0.45份、抗紫外线剂0.1份。
实施例3
一种耐用性高的可微波用PP淋膜纸,与实施例1的区别在于,PP淋膜层10由包含以下重量份的原料制备而成:聚丙烯125份、疏水性气相二氧化硅9份、马来酸酐接枝聚丙烯0.12份、抗热氧化剂0.5份、抗紫外线剂0.15份。
实施例4
一种耐用性高的可微波用PP淋膜纸,与实施例1的区别在于,PP淋膜层10由包含以下重量份的原料制备而成:聚丙烯135份、疏水性气相二氧化硅10份、马来酸酐接枝聚丙烯0.12份、抗热氧化剂0.5份、抗紫外线剂0.15份。
实施例5
一种耐用性高的可微波用PP淋膜纸,与实施例1的区别在于,PP淋膜层10由包含以下重量份的原料制备而成:聚丙烯140份、疏水性气相二氧化硅10份、马来酸酐接枝聚丙烯0.13份、抗热氧化剂0.5份、抗紫外线剂0.2份。
实施例6
一种耐用性高的可微波用PP淋膜纸,与实施例1的区别在于,PP淋膜层10由包含以下重量份的原料制备而成:聚丙烯145份、疏水性气相二氧化硅11份、马来酸酐接枝聚丙烯0.14份、抗热氧化剂0.6份、抗紫外线剂0.25份。
实施例7
一种耐用性高的可微波用PP淋膜纸,与实施例1的区别在于,PP淋膜层10由包含以下重量份的原料制备而成:聚丙烯150份、疏水性气相二氧化硅12份、马来酸酐接枝聚丙烯0.15份、抗热氧化剂0.6份、抗紫外线剂0.3份。
对比例
对比例1
一种耐用性高的可微波用PP淋膜纸,与实施例4的区别在于,PP淋膜层10的制备原料中:疏水性气相二氧化硅7份。
对比例2
一种耐用性高的可微波用PP淋膜纸,与实施例4的区别在于,PP淋膜层10的制备原料中:疏水性气相二氧化硅15份。
对比例3
一种耐用性高的可微波用PP淋膜纸,与实施例4的区别在于,PP淋膜层10的制备原料中:不添加疏水性气相二氧化硅。
对比例4,与实施例1的区别在于,淋膜层为低密度聚乙烯膜层。
性能检测试验
对实施例1-7、对比例1-4的淋膜纸成品进行以下性能测试,具体测试结果如表1所示:
表1各淋膜纸成品检测结果
由表1的评测结果可知,本申请实施例1-7的抗张强度、拉断临界力、撕裂度剂和耐折度的检测数据与对比例1-4的检测指标相当,且数据一致性较好,处于较高水平,说明本申请的淋膜纸设计结构具有较好的力学性能和使用耐久性。
由表1可知,本申请实施例1-7的耐热熔温度检测值要高于对比例1-3的检测值,说明本申请实施例中在PP淋膜层10中添加特定比例的疏水性气相二氧化硅能够显著改善PP淋膜层10的耐热温度,从而有助于提升淋膜纸的耐热性能。由表1还可知,对比例4的耐热熔温度明显低于实施例1-7和对比例1-3的检测数据,说明低密度聚乙烯淋膜层的耐热性能要低于本申请实施例的改性PP淋膜层10的耐热性能。
以上均为本申请的较佳实施例,并非依此限制本申请的保护范围,故:凡依本申请的结构、形状、原理所做的等效变化,均应涵盖于本申请的保护范围之内。
Claims (10)
1.一种耐用性高的可微波用PP淋膜纸,其特征在于,包括增强复合纸芯(1),所述增强复合纸芯(1)的两侧外层分别设置有淋膜层,所述淋膜层为PP淋膜层(10);所述增强复合纸芯(1)包括相互配合的第一芯层(11)和第二芯层(12),所述第一芯层(11)包括第一基材层(111)、固定连接于第一基材层(111)内侧面的第一内撑层(112),所述第二芯层(12)包括第二基材层(121)、固定连接于第二基材层(121)靠近第一基材层(111)一侧面的第二内撑层(122),所述第一内撑层(112)与第二内撑层(122)粘接压合连接。
2.根据权利要求1所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述第一内撑层(112)与第二内撑层(122)均设置为波纹纸层,所述第一内撑层(112)包括若干连续的第一波峰(1121)和第一波谷(1122),所述第二内撑层(122)包括若干连续的第二波峰(1221)和第二波谷(1222),所述第一波峰(1121)与第二波谷(1222)粘接、第一波谷(1122)与第二波峰(1221)粘接。
3.根据权利要求2所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述第一内撑层(112)与第二内撑层(122)对称设置,且所述第一波峰(1121)与第二波峰(1221)的高度相同。
4.根据权利要求2所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述第一内撑层(112)、第二内撑层(122)的表面分别开设有增强连接微孔(13)。
5.根据权利要求4所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述第一内撑层(112)与第一基材层(111)之间设置有环保纸浆填充层(14),所述第二内撑层(122)与第二基材层(121)之间也设置有环保纸浆填充层(14)。
6.根据权利要求1所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述增强复合纸芯(1)的内侧淋膜层外表面涂设有环保型拒水防油层(15)。
7.根据权利要求6所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述环保型拒水防油层(15)为聚四氟乙烯涂层。
8.根据权利要求1所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述增强复合纸芯(1)的外侧淋膜层外表面涂设有抗热老化涂层(16)。
9.根据权利要求8所述的一种耐用性高的可微波用PP淋膜纸,其特征在于:所述抗热老化涂层(16)为纳米陶瓷涂层。
10.根据权利要求1-9任一项所述的一种耐用性高的可微波用PP淋膜纸,其特征在于,所述PP淋膜层(10)由包含以下重量份的原料制备而成:聚丙烯120-150份、疏水性气相二氧化硅8-12份、马来酸酐接枝聚丙烯0.1-0.15份、抗热氧化剂0.4-0.6份、抗紫外线剂0.1-0.3份。
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CN208646223U (zh) * | 2018-07-10 | 2019-03-26 | 上海大汇塑业有限公司 | 一种流延聚丙烯cpp阻隔膜 |
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CN116100909A (zh) * | 2022-08-17 | 2023-05-12 | 上海新晓环保科技有限公司 | 一种环保型复合淋膜纸及其制备方法 |
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