CN116160742A - 一种pp材质奶酪复合片材及其制备方法 - Google Patents
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Abstract
本发明属于奶酪包装复合材料技术领域,且公开了一种PP材质奶酪复合片材及其制备方法,包括印刷层、复合胶水和结构层,所述复合胶水位于印刷层和结构层之间;所述结构层包括复合层,所述复合层的底部由上至下依次设置有白色反光层、第一粘接层。本发明通过制作的复合片材满足现有奶酪复合片材的使用性能,且工序上通过两层复合的方法降低了一层材料的生产和一次复合过程,大大降低了材料的加工成本和复合造成的成品缺陷率,操作起来更加方便,特别是复合片材使用了安全性高和加工技术成熟的聚烯烃PP材质,复合片材的废料可以直接回收后进行加工处理再利用,提高了材料的利用率,减少了工业废料的产生比率。
Description
技术领域
本发明属于奶酪包装复合材料技术领域,具体为一种PP材质奶酪复合片材及其制备方法。
背景技术
奶酪是一种将奶放酸之后增加酵素或细菌制作的呈乳白色或金黄色的食品,而奶酪食品在制成后需要用到奶酪包装片材进行包装,现有的奶酪包装片材基本由三种不同的材料复合而成,三种材料各有不同的功能,包括第一层印刷、第二层支撑、第三层阻隔加易揭,且三种材料需要单独生产后两次复合形成复合片材,每增加一层材料,会增加一次层材料生产成本和增加一次复合工艺,从而会增加最终产品的成本和增加复合工艺中带来的损耗和不良几率,如复合后层间气泡等不良。
发明内容
本发明的目的在于提供一种PP材质奶酪复合片材及其制备方法,以解决上述背景技术中提出的问题。
为了实现上述目的,本发明提供如下技术方案:一种PP材质奶酪复合片材及其制备方法,包括印刷层、复合胶水和结构层,所述复合胶水位于印刷层和结构层之间;
所述结构层包括复合层,所述复合层的底部由上至下依次设置有白色反光层、第一粘接层、阻氧层、第二粘接层、黑色阻光层和热封易揭层。
优选地,所述印刷层为流延聚丙烯膜CPP或双向拉伸聚丙烯薄膜BOPP的其中一种,且厚度在20um~50um之间。
优选地,所述结构层为PP多层共挤的高阻隔片材,且厚度在230um~300um之间。
优选地,所述复合层为透明PP材料且厚度为65um,所述白色反光层为PP树脂加入钛白粉母粒、碳酸钙母粒和滑石粉母粒的混合材料且厚度50um,所述第一粘接层和第二粘接层均为粘接树脂材料且厚度为10um,所述阻氧层为乙烯-乙烯醇共聚物EVOH,且厚度5um,所述黑色阻光层为PP树脂加入阻光母粒的混合材料且厚度50um。
优选地,所述热封易揭层为PP树脂加入易揭母粒的混合材料且厚度60um,所述热封易揭层的表面进行了微观意义上蜂窝状或海岛状的凹凸结构设置。
一种PP材质奶酪复合片材的制备方法,其特征在于,包括如下步骤:
S1、将复合层、白色反光层、第一粘接层、阻氧层、第二粘接层、黑色阻光层、热封易揭层七层材料通过多层流延机挤出,挤出温度为170~200℃,冷却成型温度为80℃;
S2、将挤出的片材收卷后放烘箱熟化室,在50℃的温度下处理48h后取出备用;
S3、印刷膜预处理,将流延聚丙烯膜CPP薄膜内表面电晕处理后在高速凹版印刷机上进行图案印刷;
S4、印刷层和结构层复合,将S3和S2中处理好的印刷膜和结构层片材在无溶剂复合机上进行复合,无溶剂使用双组分聚氨酯胶水;
S5、将复合好的片材放入熟化室进行分阶梯熟化处理,刚开始温度为30~35℃,后面逐渐升高到40~45℃,整个熟化时间为48h;
S6、将S5中熟化好的复合片材在分切机上按一定尺寸分切成所需规格的包装片材即可。
本发明的有益效果如下:
本发明在保持材料使用功能的条件下采用两层复合的工艺,减少了一层材料的制备和一次复合过程,可以有效第降低材料加工成本和生产过程的良品率,降低了不良风险。特别是复合片材使用了安全性高和加工技术成熟的聚丙烯PP材质,复合片材的废料可以直接回收后进行加工处理再利用,减少了对环境的污染,提高了材料的利用率,降低了成本。
附图说明
图1为本发明PP材质奶酪复合片材结构示意图;
图2为本发明结构层结构展示示意图。
附图标记:1、印刷层;2、复合胶水;3、结构层;31、复合层;32、白色反光层;33、第一粘接层;34、阻氧层;35、第二粘接层;36、黑色阻光层;37、热封易揭层。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
如图1至图2所示,本发明实施例提供了一种PP材质奶酪复合片材及其制备方法,包括印刷层1、复合胶水2和结构层3,复合胶水2位于印刷层1和结构层3之间;
结构层3包括复合层31,复合层31的底部由上至下依次设置有白色反光层32、第一粘接层33、阻氧层34、第二粘接层35、黑色阻光层36和热封易揭层37。
在一个实施例中印刷层1为流延聚丙烯膜CPP或双向拉伸聚丙烯薄膜BOPP的其中一种,且厚度在20um~50um之间。
在一个实施例中结构层3为PP多层共挤的高阻隔片材,且厚度在230um~300um之间。
在一个实施例中复合层31为透明PP材料且厚度为65um,白色反光层32为PP树脂加入钛白粉母粒、碳酸钙母粒和滑石粉母粒的混合材料且厚度50um,第一粘接层33和第二粘接层35均为粘接树脂材料且厚度为10um,阻氧层34为乙烯-乙烯醇共聚物EVOH,且厚度5um,黑色阻光层36为PP树脂加入阻光母粒的混合材料且厚度50um。
在一个实施例中热封易揭层37为PP树脂加入易揭母粒的混合材料且厚度60um,热封易揭层37的表面进行了微观意义上蜂窝状或海岛状的凹凸结构设置。
一种PP材质奶酪复合片材的制备方法,其特征在于,包括如下步骤:
S1、将复合层31、白色反光层32、第一粘接层33、阻氧层34、第二粘接层35、黑色阻光层36、热封易揭层37七层材料通过多层流延机挤出,挤出温度为170~200℃,冷却成型温度为80℃;
S2、将挤出的片材收卷后放烘箱熟化室,在50℃的温度下处理48h后取出备用;
S3、印刷膜预处理,将流延聚丙烯膜CPP薄膜内表面电晕处理后在高速凹版印刷机上进行图案印刷;
S4、印刷层1和结构层3复合,将S3和S2中处理好的印刷膜和结构层片材在无溶剂复合机上进行复合,无溶剂使用双组分聚氨酯胶水(这里无溶剂指的是复合胶水2);
S5、将复合好的片材放入熟化室进行分阶梯熟化处理,刚开始温度为30~35℃,后面逐渐升高到40~45℃,整个熟化时间为48h;
S6、将S5中熟化好的复合片材在分切机上按一定尺寸分切成所需规格的包装片材即可。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (6)
1.一种PP材质奶酪复合片材,包括印刷层(1)、复合胶水(2)和结构层(3),其特征在于:所述复合胶水(2)位于印刷层(1)和结构层(3)之间;
所述结构层(3)包括复合层(31),所述复合层(31)的底部由上至下依次设置有白色反光层(32)、第一粘接层(33)、阻氧层(34)、第二粘接层(35)、黑色阻光层(36)和热封易揭层(37)。
2.根据权利要求1所述的一种PP材质奶酪复合片材,其特征在于:所述印刷层(1)为流延聚丙烯膜CPP或双向拉伸聚丙烯薄膜BOPP的其中一种,且厚度在20um~50um之间。
3.根据权利要求1所述的一种PP材质奶酪复合片材,其特征在于:所述结构层(3)为PP多层共挤的高阻隔片材,且厚度在230um~300um之间。
4.根据权利要求1所述的一种PP材质奶酪复合片材,其特征在于:所述复合层(31)为透明PP材料且厚度为65um,所述白色反光层(32)为PP树脂加入钛白粉母粒、碳酸钙母粒和滑石粉母粒的混合材料且厚度50um,所述第一粘接层(33)和第二粘接层(35)均为粘接树脂材料且厚度为10um,所述阻氧层(34)为乙烯-乙烯醇共聚物EVOH,且厚度5um,所述黑色阻光层(36)为PP树脂加入阻光母粒的混合材料且厚度50um。
5.根据权利要求1所述的一种PP材质奶酪复合片材,其特征在于:所述热封易揭层(37)为PP树脂加入易揭母粒的混合材料且厚度60um,所述热封易揭层(37)的表面进行了微观意义上蜂窝状或海岛状的凹凸结构设置。
6.根据权利要求1所述的一种PP材质奶酪复合片材的制备方法,其特征在于,包括如下步骤:
S1、将复合层(31)、白色反光层(32)、第一粘接层(33)、阻氧层(34)、第二粘接层(35)、黑色阻光层(36)、热封易揭层(37)七层材料通过多层流延机挤出,挤出温度为170~200℃,冷却成型温度为80℃;
S2、将挤出的片材收卷后放烘箱熟化室,在50℃的温度下处理48h后取出备用;
S3、印刷膜预处理,将流延聚丙烯膜CPP薄膜内表面电晕处理后在高速凹版印刷机上进行图案印刷;
S4、印刷层(1)和结构层(3)复合,将S3和S2中处理好的印刷膜和结构层片材在无溶剂复合机上进行复合,无溶剂使用双组分聚氨酯胶水;
S5、将复合好的片材放入熟化室进行分阶梯熟化处理,刚开始温度为30~35℃,后面逐渐升高到40~45℃,整个熟化时间为48h;
S6、将S5中熟化好的复合片材在分切机上按一定尺寸分切成所需规格的包装片材即可。
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