CN113583285A - 一种超强耐磨烟用包装薄膜及其制备方法 - Google Patents

一种超强耐磨烟用包装薄膜及其制备方法 Download PDF

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CN113583285A
CN113583285A CN202110891372.8A CN202110891372A CN113583285A CN 113583285 A CN113583285 A CN 113583285A CN 202110891372 A CN202110891372 A CN 202110891372A CN 113583285 A CN113583285 A CN 113583285A
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bopp
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黎坛
王俊峰
王恩飞
黎海鸥
符旺妙
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Hainan Shiner Industrial Co Ltd
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Abstract

本发明提供一种超强耐磨烟用包装薄膜及其制备方法,包装薄膜包括BOPP单面热封膜;依次设置在所述BOPP单面热封膜的热封面的溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层;所述聚偏二氯乙烯层的制备原料包括质量比为100:(2~10):(0.1~1)的固含量30~50%的聚偏二氯乙烯、固含量25%的蜡乳液和二氧化硅;和依次设置在所述BOPP单面热封膜的非热封面的水性聚氨酯粘合剂层和丙烯酸层;所述丙烯酸层的制备原料包括质量比100:(2~10):(0.1~1)的固含量15~30%的丙烯酸、固含量25%的蜡乳液和二氧化硅。包装薄膜具有高耐磨性和热封强度;还具有较高光泽度。

Description

一种超强耐磨烟用包装薄膜及其制备方法
技术领域
本发明属于香烟包装膜技术领域,尤其涉及一种超强耐磨烟用包装薄膜及其制备方法。
背景技术
传统的BOPP香烟包装膜主要为三层共挤工艺,其滑爽面的主要材料为共聚聚丙烯,共聚聚丙烯为非结晶型材料,不耐摩擦,比较容易刮花。
传统的BOPP香烟包装膜在香烟包装、物流及销售环节会因为跟烟包机械的摩擦及香烟之间的相互摩擦及跟其它物体的摩擦会出现被刮花及发雾现象,从而降低香烟的档次,影响消费者的购买欲望。
发明内容
有鉴于此,本发明的目的在于提供一种超强耐磨烟用包装薄膜及其制备方法,该薄膜具有较高的热封强度和较好的耐磨性。
本发明提供了一种超强耐磨烟用包装薄膜,包括BOPP单面热封膜;
依次设置在所述BOPP单面热封膜的热封面的溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层;所述聚偏二氯乙烯层的制备原料包括质量比为100:(2~10):(0.1~1)的固含量30~50%的聚偏二氯乙烯、固含量25%的蜡乳液和二氧化硅;
和依次设置在所述BOPP单面热封膜的非热封面的水性聚氨酯粘合剂层和丙烯酸层;所述丙烯酸层的制备原料包括质量比100:(2~10):(0.1~1)的固含量15~30%的丙烯酸、固含量25%的蜡乳液和二氧化硅。
在本发明中,所述溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层作为包装薄膜的滑爽面,即在包装过程中薄膜与制备时采用的设备的直接接触面。所述水性聚氨酯粘合剂层和丙烯酸层作为包装薄膜的烟包面,即在包装过程中薄膜和香烟的直接接触面。滑爽面对烟包面的热封强度达到2.5N/15mm以上。
在本发明中,所述溶剂型聚氨酯粘合剂层由溶剂型聚氨酯涂布制得,固含量为45~75%,载体为乙酸乙酯;
所述水性聚氨酯粘合剂由固含量20~40%的聚氨酯涂布制得。
本发明在热封面上先涂布溶剂型聚氨酯粘合剂层后再涂聚偏二氯乙烯乳液,烘干后使得聚偏二氯乙烯乳液的结晶度提高,从而提高耐磨性。
在本发明中,所述固含量25%的蜡乳液中包括棕榈蜡和水。
在本发明中,所述二氧化硅为粒度3~5微米的天然二氧化硅。
在本发明中,所述溶剂型聚氨酯粘合剂层的厚度为0.1~1微米,所述聚偏二氯乙烯层的厚度为0.5~3微米;
所述水性聚氨酯粘合剂层的厚度为0.1~1微米,所述丙烯酸层的厚度为0.5~2微米。
在本发明中,所述BOPP单面热封膜的厚度为18~30微米,收缩率为2~10%,热封面的表面张力≥35达因,非热封面的表面张力≥36达因。所述BOPP单面热封膜的热封面对热封面的热封强度≥2N/15mm(1秒,120℃,压力0.18mPa)。
本发明提供了一种上述技术方案所述超强耐磨烟用包装薄膜的制备方法,包括以下步骤:
将BOPP单面热封膜的热封面先后涂布底涂溶剂型聚氨酯粘合剂及面涂聚偏二氯乙烯乳液,烘干;
再继续在BOPP单面热封膜的非热封面先后涂布底涂水性聚氨酯粘合剂及面涂丙烯酸涂料,烘干,得到超强耐磨烟用包装薄膜。
在本发明中,所述烘干的温度为70~120℃;
涂布的速度为80~200m/min。
本发明提供了一种超强耐磨烟用包装薄膜,包括BOPP单面热封膜;依次设置在所述BOPP单面热封膜的热封面的溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层;所述聚偏二氯乙烯层的制备原料包括质量比为100:(2~10):(0.1~1)的固含量30~50%的聚偏二氯乙烯、固含量25%的蜡乳液和二氧化硅;和依次设置在所述BOPP单面热封膜的非热封面的水性聚氨酯粘合剂层和丙烯酸层;所述丙烯酸层的制备原料包括质量比100:(2~10):(0.1~1)的固含量15~30%的丙烯酸、固含量25%的蜡乳液和二氧化硅。本发明通过采用溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层作为包装薄膜的滑爽面,水性聚氨酯粘合剂层和丙烯酸层作为烟包面,共同作用,使得包装薄膜具有高耐磨性和热封强度;还具有较高光泽度。实验结果表明:超强耐磨烟用包装薄膜的耐磨性为HO级,热封强度为2.85~3.23N/15mm,雾度为1.9%~2.3%。
具体实施方式
为了进一步说明本发明,下面结合实施例对本发明提供的一种超强耐磨烟用包装薄膜及其制备方法进行详细地描述,但不能将它们理解为对本发明保护范围的限定。
实施例1
将25微米的BOPP单面热封膜进行涂布,烟包面涂层底涂厚度0.1微米,面涂厚度0.7微米。面涂配料,100公斤20%含量的丙烯酸中,加入25%含量的蜡乳液4公斤,再加入稀释成10%含量的二氧化硅0.4公斤,充分搅拌。底涂配方,10公斤33%含量的水性聚氨酯加入56公斤软水稀释成5%。
滑爽面涂层底涂厚度0.3微米,面涂厚度1.2微米。面涂配料:100公斤50%含量的PVDC乳液中,加入25%含量的蜡乳液8公斤,再加入稀释成10%含量的二氧化硅1公斤,充分搅拌。底涂配方:10公斤55%含量的聚氨酯加入35.8公斤乙酸乙酯稀释成12%。
涂布机生产速度200m/min;底涂烘干温度100~70℃,面涂烘干温度110~70℃,涂布后时效条件:40℃,48小时。
表1实施例1制备的超强耐磨烟用包装薄膜的性能测试结果
测试方法 测试结果
耐磨性 GB/T31727-2015 HO
热封强度 ASTM D 1003 2.95N/15mm
雾度 ASTM F88 2.1%
实施例2
将28微米的BOPP单面热封膜进行涂层,烟包面涂层底涂厚度0.15微米,面涂厚度0.8微米。面涂配料,200公斤20%含量的丙烯酸中,加入25%含量的蜡乳液10公斤,再加入稀释成10%含量的二氧化硅0.9公斤,充分搅拌。底涂配方,20公斤33%含量的水性聚氨酯加入60公斤软水稀释成8.3%。
滑爽面涂层底涂厚度0.4微米:面涂厚度1.3微米。面涂配料,200公斤50%含量的PVDC乳液中,加入25%含量的蜡乳液20公斤,再加入稀释成10%含量的二氧化硅2.2公斤,充分搅拌。底涂配方,20公斤55%含量的聚氨酯加入65公斤乙酸乙酯稀释成12.9%。
涂布机生产速度180m/min;底涂烘干温度90~70℃,面涂烘干温度100~70℃,涂布后时效条件:45℃,45小时。
表2实施例2制备的超强耐磨烟用包装薄膜的性能测试结果
测试方法 测试结果
耐磨性 GB/T31727-2015 HO
热封强度 ASTM D 1003 3.23N/15mm
雾度 ASTM F88 2.3%
实施例3
将22微米的BOPP单面热封膜进行涂层,烟包面涂层底涂厚度0.1微米,面涂厚度0.9微米。面涂配料,100公斤25%含量的丙烯酸中,加入25%含量的蜡乳液5公斤,再加入稀释成10%含量的二氧化硅0.5公斤,充分搅拌。底涂配方,10公斤33%含量的水性聚氨酯加入56公斤软水稀释成5%。
滑爽面涂层底涂厚度0.4微米:面涂厚度1.3微米。面涂配料,100公斤50%含量的PVDC乳液中,加入25%含量的蜡乳液10公斤,再加入稀释成10%含量的二氧化硅0.9公斤,充分搅拌。底涂配方,15公斤55%含量的聚氨酯加入50公斤乙酸乙酯稀释成12.7%。
涂布机生产速度190m/min;底涂烘干温度95~70℃,面涂烘干温度105~70℃,涂布后时效条件:38℃,50小时。
表3实施例3制备的超强耐磨烟用包装薄膜的性能测试结果
测试方法 测试结果
耐磨性 GB/T31727-2015 HO
热封强度 ASTM D 1003 2.85N/15mm
雾度 ASTM F88 1.9%
对比例1
在实施例1基础上,采用BOPP光膜取代BOPP单面热封膜制得涂布膜。
涂布膜的热封强度只有1.02N/15mm,达不到包装要求。
对比例2
在实施例1基础上,采用水性聚氨酯完全取代溶剂型聚氨酯,则制得的涂布膜的雾度为4.8%,达不到包装要求。
由以上实施例可知,超强耐磨烟用包装薄膜,包括BOPP单面热封膜;依次设置在所述BOPP单面热封膜的热封面的溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层;所述聚偏二氯乙烯层的制备原料包括质量比为100:(2~10):(0.1~1)的固含量30~50%的聚偏二氯乙烯、固含量25%的蜡乳液和二氧化硅;和依次设置在所述BOPP单面热封膜的非热封面的水性聚氨酯粘合剂层和丙烯酸层;所述丙烯酸层的制备原料包括质量比100:(2~10):(0.1~1)的固含量15~30%的丙烯酸、固含量25%的蜡乳液和二氧化硅。本发明通过采用溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层作为包装薄膜的滑爽面,水性聚氨酯粘合剂层和丙烯酸层作为烟包面,共同作用,使得包装薄膜具有高耐磨性和热封强度;还具有较高光泽度。实验结果表明:超强耐磨烟用包装薄膜的耐磨性为HO级,热封强度为2.85~3.23N/15mm,雾度为1.9%~2.3%。
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 (8)

1.一种超强耐磨烟用包装薄膜,包括BOPP单面热封膜;
依次设置在所述BOPP单面热封膜的热封面的溶剂型聚氨酯粘合剂层和聚偏二氯乙烯层;所述聚偏二氯乙烯层的制备原料包括质量比为100:(2~10):(0.1~1)的固含量30~50%的聚偏二氯乙烯、固含量25%的蜡乳液和二氧化硅;
和依次设置在所述BOPP单面热封膜的非热封面的水性聚氨酯粘合剂层和丙烯酸层;所述丙烯酸层的制备原料包括质量比100:(2~10):(0.1~1)的固含量15~30%的丙烯酸、固含量25%的蜡乳液和二氧化硅。
2.根据权利要求1所述的超强耐磨烟用包装薄膜,其特征在于,溶剂型聚氨酯粘合剂层由溶剂型聚氨酯涂布制得,固含量为45~75%,载体为乙酸乙酯;
所述水性聚氨酯粘合剂由固含量20~40%的聚氨酯涂布制得。
3.根据权利要求1所述的超强耐磨烟用包装薄膜,其特征在于,所述固含量25%的蜡乳液中包括棕榈蜡和水。
4.根据权利要求1所述的超强耐磨烟用包装薄膜,其特征在于,所述二氧化硅为粒度3~5微米的天然二氧化硅。
5.根据权利要求1所述的超强耐磨烟用包装薄膜,其特征在于,所述溶剂型聚氨酯粘合剂层的厚度为0.1~1微米,所述聚偏二氯乙烯层的厚度为0.5~3微米;
所述水性聚氨酯粘合剂层的厚度为0.1~1微米,所述丙烯酸层的厚度为0.5~2微米。
6.根据权利要求1所述的超强耐磨烟用包装薄膜,其特征在于,所述BOPP单面热封膜的厚度为18~30微米,收缩率为2~10%,热封面的表面张力≥35达因,非热封面的表面张力≥36达因。
7.一种权利要求1~6任一项所述超强耐磨烟用包装薄膜的制备方法,包括以下步骤:
将BOPP单面热封膜的热封面先后涂布底涂溶剂型聚氨酯粘合剂及面涂聚偏二氯乙烯乳液,烘干;
再继续在BOPP单面热封膜的非热封面先后涂布底涂水性聚氨酯粘合剂及面涂丙烯酸涂料,烘干,得到超强耐磨烟用包装薄膜。
8.根据权利要求7所述的制备方法,其特征在于,所述烘干的温度为70~120℃;
涂布的速度为80~200m/min。
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