CN114734654A - 一种高阻隔包装材料的制备方法 - Google Patents
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Abstract
本发明提供了一种高阻隔包装材料的制备方法,由铝箔与LDPE薄膜或PP薄膜复合制成,其中LDPE薄膜为多层共挤聚乙烯薄膜,PP薄膜为多层共挤聚丙烯薄膜。本发明简洁的材料结构方式,赋予了软包装的包装功能、展示功能、高阻隔功能、低成本方便回收、回收利用价值高等特点,解决现有软包装在高阻隔和材料结构复杂的矛盾、解决回收分解成本高、回收再利用价值低的痛点;该材料结构还可以制成半成品,在终端客户的产线附近或园区内布置印刷工序,完成印刷作业,可以实现订单小型化、快速响应;选用水性等环保型油墨及印刷方式,更能符合环保要求。
Description
技术领域
本发明公开了一种高阻隔包装材料的制备方法,属于包装材料技术领域。
背景技术
近几年来,软包装市场追求材料单一化、循环可利用、可降解、材料去铝化,但是,实际生产的产品却不能满足包装的基本功能要求。产品的真实需求:①完成包装的基本功能;②提供对水、空气、光线的高阻隔要求;③利用材料的较大的熔点差异,后期通过高温熔融法就可以简便将材料进行分解,从而回收使用。而满足上述3点真实需要的技术才能提供安全可靠、资源可再生利用的软包装材料。但是,现有技术中,没有发现这种产品和技术的公开。
发明内容
为了克服上述现有技术的不足,本发明提供了一种高阻隔包装材料的制备方法。
本发明的技术方案如下:一种高阻隔包装材料的制备方法,由铝箔与LDPE薄膜或PP薄膜复合制成,其中LDPE薄膜为多层共挤聚乙烯薄膜,PP薄膜为多层共挤聚丙烯薄膜。
进一步的,所述复合方式为淋膜复合,确保材料的纯净度,提高后期回收循环的价值。
进一步的,所述LDPE薄膜制备中,在多层共挤聚乙烯薄膜的内层热封层,添加10~60%的聚乙烯弹性体材料,添加20~40%的SP2000B聚丁烯材料,10~60%的BP-1聚丁烯材料,与基础材料进行充分混合后共挤成膜;
PP薄膜制备中,在多层共挤聚丙烯薄膜的内层热封层,添加10~15%的聚乙烯弹性体材料,添加20~40%的SP2000B聚丁烯材料,10~60%的BP-1聚丁烯材料,与基础材料进行充分混合后共挤成膜;
根据装填内容物及加工参数选取所述LDPE薄膜或PP薄膜材料,并确定其厚度。
进一步的,所述复合后充分熟化,熟化时间在12小时以上,释放复合作业时产生的热应力,让薄膜平顺;在此基础上按需要的图案进行印刷,印刷在铝箔层外表面,印刷完成后在线或者离线进行分切,根据要求分切成不同宽度的规格产品,或根据产品和包装所需要的厚度和宽度,对完成熟化的半制成品释放热应力后进行分切,将符合厚度要求的半制成品裁切成相应宽度的半成品,在终端客户的产线附近或园区内布置印刷工序,完成印刷作业。
进一步的,所述铝箔的厚度根据内容物的阻隔要求和内容物的装填方式设定,并最终设定包装膜材料的总厚度。
更进一步的,所述铝箔厚度在阻隔要求极高时大于9μm,对于包装的最终外观形式为包围式、在封装前需要对包装膜材料进行预冲压拉伸成型的,铝箔厚度在25μm以上,包装膜材料总厚度在100μm以上。
更进一步的,所述印刷采用水性油墨,适应高速包装机械对表面摩擦系数和热封耐温要求,在油墨的最表面一层选用耐温性较高的耐高温光油进行全表面覆盖。
本发明的有益技术效果是:简洁的材料结构方式,赋予了软包装的包装功能、展示功能、高阻隔功能、低成本方便回收、回收利用价值高等特点,解决现有软包装在高阻隔和材料结构复杂的矛盾、解决回收分解成本高、回收再利用价值低的痛点;该材料结构还可以制成半成品,在终端客户的产线附近或园区内布置印刷工序,完成印刷作业,可以实现订单小型化、快速响应;选用水性等环保型油墨及印刷方式,更能符合环保要求。
附图说明
下面结合附图对本发明进一步说明。
图1为本发明的工艺流程图。
具体实施方式
实施例1
一种高阻隔包装材料的制备方法,由铝箔与LDPE薄膜或PP薄膜复合制成,其中LDPE薄膜为多层共挤聚乙烯薄膜,PP薄膜为多层共挤聚丙烯薄膜。
本发明给出了一种特有的、简洁的材料结构方式,赋予了软包装的包装功能;展示功能:蚌式包装或预拉伸包装的立体效果强,且可以根据预拉伸模具的形状变化的多样性和方便性,来提供变化多样的外形效果;
低成本方便回收:制程中的边角料、尾料以及使用后的废弃物均可以进行简单的粉碎后,进行高温加热的方式,利用铝和聚乙烯(或聚丙烯)之间较大的熔点差异,可以很方便地将2种材料进行分解和回收。当然使用后的废弃物在粉碎后需要进行清洗,以清除粘附在上面的其他垃圾灰尘等,以提高回收物的纯净度,降低能源消耗和有害物的产生。
回收利用价值高:分解后材料的纯度高、杂质少、符合循环使用的卫生标准是衡量回收价值的标准,解决现有软包装在高阻隔和材料结构复杂的矛盾、解决回收分解成本高、回收再利用价值低的痛点。
实施例2
如图1所示,作为具体设计,LDPE薄膜和PP薄膜均需要根据客户的在最终要求选定不同的厚度或配方要求;LDPE薄膜和PP薄膜均需满足封装后的热封剥离强度处容易打开。因此,本实施例中,LDPE薄膜配方:①在多层共挤聚乙烯薄膜的内层热封层,需要添加10-60%的EVA聚乙烯弹性体材料,与基础材料进行充分混合后共计成膜;②在多层共挤聚乙烯薄膜的内层热封层,需要添加20-40%的SP2000B聚丁烯材料,与基础材料进行充分混合后共挤成膜;③在多层共挤聚乙烯薄膜的内层热封层,需要添加10-60%的BP-1聚丁烯材料,与基础材料进行充分混合后共挤成膜;PP薄膜配方:①在多层共挤聚丙烯薄膜的内层热封层,需要添加10-15%的EVA聚乙烯弹性体材料,与基础材料进行充分混合后共挤成膜;②在多层共挤聚乙烯薄膜的内层热封层,需要添加20-40%的SP2000B聚丁烯材料,与基础材料进行充分混合后共挤成膜;③在多层共挤聚乙烯薄膜的内层(热封层),需要添加10-60%的BP-1聚丁烯材料,与基础材料进行充分混合后共挤成膜;根据装填内容物及加工参数选取所述LDPE薄膜或PP薄膜材料,并确定其厚度;印刷在铝箔层外表面。
复合方式为淋膜复合,确保材料的纯净度,提高后期回收循环的价值。复合后充分熟化,熟化时间在12小时以上,释放复合作业时产生的热应力,让薄膜平顺;在此基础上按需要的图案进行印刷,印刷在铝箔层外表面,印刷完成后在线或者离线进行分切,根据要求分切成不同宽度的规格产品,或根据产品和包装所需要的厚度和宽度,对完成熟化的半制成品释放热应力后进行分切,将符合厚度要求的半制成品裁切成相应宽度的半成品,在终端客户的产线附近或园区内布置印刷工序,完成印刷作业。
铝箔根据内容物的阻隔要求和内容物的装填方式设定铝箔的厚度和包装膜材料的总厚度。印刷采用水性油墨,适应高速包装机械对表面摩擦系数和热封耐温要求,在油墨的最表面一层选用耐温性较高的耐高温光油进行全表面覆盖。对于阻隔要求极高时铝箔厚度大于9μm,对于包装的最终外观形式为包围式(也称蚌式)、在封装前需要对包装膜材料进行预冲压拉伸成型的,铝箔厚度在25μm以上。包装膜材料总厚度原则上在100μm以上。高阻隔功能:选择最薄9μm以上的铝箔厚度,对于各种气体的阻隔率和水分的阻隔率均默认为0克或0毫升,对于各类产品的具备极好的保护作用;该材料结构还可以制成半成品,在终端客户的产线附近或园区内布置印刷工序,完成印刷作业,可以实现订单小型化、快速响应;选用水性等环保型油墨及印刷方式,更能符合环保要求。
本发明上述实施例给出了简洁的材料结构方式,赋予了软包装的包装功能、展示功能、高阻隔功能、低成本方便回收、回收利用价值高等特点,解决现有软包装在高阻隔和材料结构复杂的矛盾、解决回收分解成本高、回收再利用价值低的痛点;该材料结构还可以制成半成品,在终端客户的产线附近或园区内布置印刷工序,完成印刷作业,可以实现订单小型化、快速响应;选用水性等环保型油墨及印刷方式,更能符合环保要求。
上述实施例是对本发明技术方案的说明,不能作为对本发明技术方案的限定,凡是以本发明基础上的简单改进或变形,都是本发明保护的范围。
Claims (7)
1.一种高阻隔包装材料的制备方法,其特征在于:由铝箔与LDPE薄膜或PP薄膜复合制成,其中LDPE薄膜为多层共挤聚乙烯薄膜,PP薄膜为多层共挤聚丙烯薄膜。
2.根据权利要求1所述的高阻隔包装材料的制备方法,其特征在于:所述复合方式为淋膜复合,确保材料的纯净度。
3.根据权利要求1所述的高阻隔包装材料的制备方法,其特征在于:所述LDPE薄膜制备中,在多层共挤聚乙烯薄膜的内层热封层,添加10~60%的聚乙烯弹性体材料,添加20~40%的SP2000B聚丁烯材料,10~60%的BP-1聚丁烯材料,与基础材料进行充分混合后共挤成膜;PP薄膜制备中,在多层共挤聚丙烯薄膜的内层热封层,添加10~15%的聚乙烯弹性体材料,添加20~40%的SP2000B聚丁烯材料,10~60%的BP-1聚丁烯材料,与基础材料进行充分混合后共挤成膜;根据装填内容物及加工参数选取所述LDPE薄膜或PP薄膜材料,并确定其厚度。
4.根据权利要求1所述的高阻隔包装材料的制备方法,其特征在于:所述复合后充分熟化,熟化时间在12小时以上,释放复合作业时产生的热应力,让薄膜平顺;在此基础上按需要的图案进行印刷,印刷在铝箔层外表面,印刷完成后在线或者离线进行分切,根据要求分切成不同宽度的规格产品,或根据产品和包装所需要的厚度和宽度,对完成熟化的半制成品释放热应力后进行分切,将符合厚度要求的半制成品裁切成相应宽度的半成品,在终端客户的产线附近或园区内布置印刷工序,完成印刷作业。
5.根据权利要求1所述的高阻隔包装材料的制备方法,其特征在于:所述铝箔的厚度根据内容物的阻隔要求和内容物的装填方式设定,并最终设定包装膜材料的总厚度。
6.根据权利要求5所述的高阻隔包装材料的制备方法,其特征在于:所述铝箔厚度在阻隔要求极高时大于9μm,对于包装的最终外观形式为包围式、在封装前需要对包装膜材料进行预冲压拉伸成型的,铝箔厚度在25μm以上,包装膜材料总厚度在100μm以上。
7.根据权利要求4所述的高阻隔包装材料的制备方法,其特征在于:所述印刷采用水性油墨,适应高速包装机械对表面摩擦系数和热封耐温要求,在油墨的最表面一层选用耐温性较高的耐高温光油进行全表面覆盖。
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