CN110305601B - 一种超粘触感预涂膜及其制备方法 - Google Patents
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Abstract
本发明提供了一种超粘触感预涂膜,包含顺次设置的触感油涂层、BOPP薄膜层、EVA热熔胶层和增粘剂涂层,其中触感油涂层的厚度为1~3μm,BOPP薄膜层的厚度为13~20μm,EVA热熔胶层的厚度为10~15μm,增粘剂涂层的厚度为0.3~1μm。本发明所述的预涂膜与常用的纸张印刷品复合后,具有较强的粘性,大大延长了纸张印刷品的使用寿命,由实施例结果可知,本申请所述的预涂膜覆于印刷品纸张上后,测得预涂膜与印刷品纸张的粘合强度≥5.0N/m,将其置于室外,经历折叠、风吹、日晒、雨淋等测试,一年内不会产生气泡,且预涂膜和印刷品不会出现脱离的现象。
Description
技术领域
本发明涉及一种预涂膜,特别是涉及一种超粘触感预涂膜。
背景技术
随着社会的发展,人们对于产品包装的工艺效果要求越来越高,触感预涂膜因表面有丝绒光滑、细腻的特殊触感,与印刷品复合后,能够使印刷质感更加厚实丰满,色彩更加鲜艳柔和,提高印刷品的光泽和艺术效果,起到美化的作用,使产品更具有吸引力,被广泛应用于各类包装盒、包装袋、图书封面等纸张印刷品。
然而,对于传统的触感预涂膜,触感油涂布在BOPP薄膜上烘干,收卷后,其主要成份水性聚氨酯在常温下其内部反应基团会再进行反应,并与交联剂充分交联,大大提高了触感油在BOPP薄膜上的附着力,但同时也会影响预涂膜背面EVA热熔胶的粘力,导致EVA热熔胶的表面张力下降,与稍厚的印刷品复合时,粘合效果较差,严重缩短了印刷品的寿命。
发明内容
本发明的目的是提供一种超粘触感预涂膜,该预涂膜克服了上述现有技术中存在的缺陷,在与市场上出售的印刷品复合后,与其有较强的粘性,粘合强度≥5.0N/m,将其置于室外,经历折叠、风吹、日晒、雨淋等测试,一年内不会产生气泡,且预涂膜和印刷品不会出现脱离的现象,大大延长了印刷制品的寿命。
为实现上述目的,本发明提供了以下技术方案:
本发明提供了一种超粘触感预涂膜,包含顺次设置的触感油涂层、BOPP薄膜层、EVA热熔胶层和增粘剂涂层。
优选的,所述触感油涂层的厚度为1~3μm。
优选的,所述BOPP薄膜层的厚度为13~20μm。
优选的,所述EVA热熔胶层的厚度为10~15μm。
优选的,所述增粘剂涂层的厚度为0.3~1μm。
本发明还提供了一种上述超粘触感预涂膜的制备方法,包括如下步骤:
(1)将触感油涂布到BOPP薄膜的一侧,烘干,得到第一复合层;
(2)将EVA热熔胶颗粒熔化并复合在第一复合层的BOPP薄膜层一侧,烘干,得到第二复合层;
(3)在第二复合层的EVA热熔胶层一侧涂布增粘剂,烘干,得到预涂膜。
优选的,所述触感油的主要成分含有水性聚氨酯和二氧化硅。
优选的,所述增粘剂为硅烷偶联剂与甲醇的混合物。
本发明的有益技术效果:
本发明提供了一种超粘触感预涂膜,包含顺次设置的触感油涂层、BOPP薄膜层、EVA热熔胶层和增粘剂涂层,其中触感油涂层的厚度为1~3μm,BOPP薄膜层的厚度为13~20μm,EVA热熔胶层的厚度为10~15μm,增粘剂涂层的厚度为0.3~1μm。本发明所述的预涂膜与常用的纸张印刷品复合后,具有较强的粘性,大大延长了纸张印刷品的使用寿命,由实施例结果可知,本申请所述的预涂膜覆于印刷品纸张上后,测得预涂膜与印刷品纸张的粘合强度≥5.0N/m,将其置于室外,经历折叠、风吹、日晒、雨淋等测试,一年内不会产生气泡,且预涂膜和印刷品不会出现脱离的现象。
本发明还提供了上述超粘触感预涂膜的制备方法,将触感油涂布到BOPP薄膜的一侧,烘干,得到第一复合层;将EVA热熔胶颗粒熔化并复合在第一复合层的BOPP薄膜层一侧,烘干,得到第二复合层;在第二复合层的EVA热熔胶层一侧涂布增粘剂,烘干,得到预涂膜。本发明提供的超粘触感预涂膜的制备方法操作简单,易于实施。
具体实施方式
本发明提供了一种超粘触感预涂膜,包含顺次设置的触感油涂层、BOPP薄膜层、EVA热熔胶层和增粘剂涂层。
在本发明中,触感油涂层的厚度优选为1~3μm,更优选1~2μm;BOPP薄膜层的厚度优选为13~20μm,更优选为15~18μm;EVA热熔胶层的厚度优选为10~15μm,更优选为10~13μm;增粘剂涂层的厚度优选为0.3~1μm,更优选为0.5~0.8μm。
本发明还提供了一种上述超粘触感预涂膜的制备方法,包括如下步骤:
(1)将触感油涂布到BOPP薄膜的一侧,烘干,得到第一复合层;
(2)将EVA热熔胶颗粒熔化并复合在第一复合层的BOPP薄膜层一侧,烘干,得到第二复合层;
(3)在第二复合层的EVA热熔胶层一侧涂布增粘剂,烘干,得到预涂膜。
在本发明中,所述触感油的主要成分含有水性聚氨酯和二氧化硅,其中水性聚氨酯的质量含量优选为45~50%,二氧化硅的质量含量优选20~30%,本发明对所述触感油的来源没有特殊要求,选用市场上常规出售的触感油即可;本发明采用网纹辊转移刮刀式涂布技术,在常温下将触感油涂布到BOPP薄膜的一侧,网纹辊优选120线,所采用的的涂布机购买于汕头新中阳机械有限公司,当触感油涂层的厚度符合要求时,涂布结束,再将其置于60~70℃的温度下烘干1~1.5s,烘干后收卷,常温下放置熟化1~2h,使触感油充分固化,提高与BOPP薄膜的附着力,熟化结束后得到第一复合层。
得到第一复合层后,将EVA热熔胶颗粒通过挤出复合机的吸料机送至其机筒内进行熔化,熔化的温度优选为220~230℃,熔化的时间为1~2min,直至EVA热熔胶全部融熔为液态且具有较好的流动性;将熔化好的液态EVA热熔胶通过设定好厚度的模头挤出复合到第一复合层的BOPP薄膜层一侧,直至得到厚度符合要求的EVA热熔胶层,挤出复合时的温度优选为220~230℃,更优选为225℃;复合完成EVA热熔胶层后,再通过成型辊压合成卷得到第二复合层。
得到第二复合层后,采用网纹辊转移刮刀式涂布方式,在EVA热熔胶层上均匀涂布增粘剂,直至得到厚度符合要求的增粘剂涂层,所采用的涂布机购买于汕头新中阳机械有限公司,网纹辊优选为170线;在本发明中,所述增粘剂优选为硅烷偶联剂和甲醇的混合物,其中硅烷偶联剂的质量分数优选为1~10%;将增粘剂涂布到EVA热熔胶层的一侧后,优选在50~60℃的温度下烘干1~2s,烘干后通过成型辊压合成卷,放置1~2h熟化,以提高增粘剂与EVA热熔胶涂层的结合力,熟化结束后得到本申请所述的超粘触感预涂膜。
下面结合实施例对本发明提供的超粘触感预涂膜及其制备方法进行详细的说明,但是不能把它们理解为对本发明保护范围的限定。
实施例1:
选取厚度为14μm的BOPP薄膜,并称取适量的外购触感油(水性聚氨酯的质量含量为46%,二氧化硅的质量含量为25%,余量为水),通过购买于汕头新中阳机械有限公司的涂布机,将触感油涂布在BOPP薄膜一侧,涂布机的网纹辊为120线,当触感油涂层的厚度达到1.5μm时,停止涂布机涂布,并在60℃的温度下烘干1s,烘干后,通过成型辊压合成卷,常温下放置1h,得到包含BOPP薄膜层和触感油涂层的第一复合层;
得到第一复合层后,将粒径为4mm的EVA热熔胶颗粒通过挤出复合机的吸料机送至机筒内,将其在222℃的温度下加热熔化,熔化1min使EVA热熔胶全部熔化成液态,且直至流动性较好为止;将熔化的EVA热熔胶通过挤出复合机(由江门市辉隆塑料机械有限公司制造)的模头挤出涂布到第一复合层的BOPP薄膜一侧,挤出涂布的温度为222℃,直至EVA热熔胶的厚度为11μm时停止挤出,冷却至EVA热熔胶层成固态,最后通过成型辊进行压合成卷得到第二复合层。
得到第二复合层后,采用购买于汕头新中阳机械有限公司的涂布机,以网纹辊转移刮刀式涂布方式,在EVA热熔胶层表面均匀涂布增粘剂,增粘剂为硅烷偶联剂与甲醇的混合物(其中硅烷偶联剂的质量分数为2%),当增粘剂涂层的厚度达到0.4μm时,停止涂布,在52℃的温度下烘干1s,烘干结束后通过成型辊压合成卷,在常温下放置1h,得到本申请所述的超粘触感预涂膜。
将实施例1制备的预涂膜覆于印刷品纸张上后,测得预涂膜与印刷品纸张的粘合强度≥5.0N/m,将其置于室外,经历折叠、风吹、日晒、雨淋等测试,一年内不会产生气泡,且预涂膜和印刷品不会出现脱离的现象。
实施例2:
选取厚度为17μm的BOPP薄膜,并称取适量的外购触感油(水性聚氨酯的质量含量为48%,二氧化硅的质量含量为22%,余量为水),通过购买于汕头新中阳机械有限公司的涂布机,将触感油涂布在BOPP薄膜一侧,涂布机的网纹辊为120线,当触感油涂层的厚度达到2μm时,停止涂布机涂布,并在65℃的温度下烘干1.5s,烘干后,通过成型辊压合成卷,常温下放置1.5h,得到包含BOPP薄膜层和触感油涂层的第一复合层;
得到第一复合层后,将粒径为8mm的EVA热熔胶颗粒通过挤出复合机的吸料机送至机筒内,将其在228℃的温度下加热熔化,熔化2min使EVA热熔胶全部熔化成液态,且流动性较好为止;将熔化的EVA热熔胶通过挤出复合机(由江门市辉隆塑料机械有限公司制造)的模头挤出涂布到第一复合层的BOPP薄膜一侧,挤出涂布的温度为228℃,直至EVA热熔胶的厚度为13μm时停止挤出,冷却至EVA热熔胶层成固态,最后通过成型辊进行压合成卷得到第二复合层。
得到第二复合层后,采用购买于汕头新中阳机械有限公司的涂布机,以网纹辊转移刮刀式涂布方式,在EVA热熔胶层表面均匀涂布增粘剂,增粘剂为硅烷偶联剂与甲醇的混合物(其中硅烷偶联剂的质量分数为5%),当增粘剂涂层的厚度达到0.6μm时,停止涂布,在55℃的温度下烘干2s,烘干结束后通过成型辊压合成卷,在常温下放置2h,得到本申请所述的超粘触感预涂膜。
将实施例2制备的预涂膜覆于印刷品纸张上后,测得预涂膜与印刷品纸张的粘合强度≥5.0N/m,将其置于室外,经历折叠、风吹、日晒、雨淋等测试,一年内不会产生气泡,且预涂膜和印刷品不会出现脱离的现象。
实施例3:
选取厚度为14μm的BOPP薄膜,并称取适量的外购触感油(水性聚氨酯的质量含量为50%,二氧化硅的质量含量为28%,余量为水),通过购买于汕头新中阳机械有限公司的涂布机,将触感油涂布在BOPP薄膜一侧,涂布机的网纹辊为120线,当触感油涂层的厚度达到3μm时,停止涂布机涂布,并在68℃的温度下烘干1.5s,烘干后,通过成型辊压合成卷,常温下放置1.5h,得到包含BOPP薄膜层和触感油涂层的第一复合层;
得到第一复合层后,将粒径为5mm的EVA热熔胶颗粒通过挤出复合机的吸料机送至机筒内,将其在225℃的温度下加热熔化,熔化2min使EVA热熔胶全部熔化成液态,且流动性较好为止;将熔化的EVA热熔胶通过挤出复合机(由江门市辉隆塑料机械有限公司制造)的模头挤出涂布到第一复合层的BOPP薄膜一侧,挤出涂布的温度为225℃,直至EVA热熔胶的厚度为14μm时停止挤出,冷却至EVA热熔胶层成固态,最后通过成型辊进行压合成卷得到第二复合层。
得到第二复合层后,采用购买于汕头新中阳机械有限公司的涂布机,以网纹辊转移刮刀式涂布方式,在EVA热熔胶层表面均匀涂布增粘剂,增粘剂为硅烷偶联剂与甲醇的混合物(其中硅烷偶联剂的质量分数为9%),当增粘剂涂层的厚度达到1μm时,停止涂布,在59℃的温度下烘干2s,烘干结束后通过成型辊压合成卷,在常温下放置2h,得到本申请所述的超粘触感预涂膜。
将实施例3制备的预涂膜覆于印刷品纸张上后,测得预涂膜与印刷品纸张的粘合强度≥5.0N/m,将其置于室外,经历折叠、风吹、日晒、雨淋等测试,一年内不会产生气泡,且预涂膜和印刷品不会出现脱离的现象。
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 (4)
1.一种超粘触感预涂膜,包含顺次设置的触感油涂层、BOPP薄膜层、EVA热熔胶层和增粘剂涂层;
所述触感油的主要成分含有水性聚氨酯和二氧化硅,其中水性聚氨酯的质量含量为45~50%,二氧化硅的质量含量为20~30%;所述触感油涂层的厚度为1~3μm;
所述增粘剂为硅烷偶联剂和甲醇的混合物,其中硅烷偶联剂的质量分数为1~10%,所述增粘剂涂层的厚度为0.3~1μm;
所述BOPP薄膜层的厚度为13~20μm;
所述EVA热熔胶层的厚度为10~15μm;
所述超粘触感预涂膜的制备方法,包括如下步骤:
(1)将触感油涂布到BOPP薄膜的一侧,烘干,得到第一复合层;
(2)将EVA热熔胶颗粒熔化并复合在第一复合层的BOPP薄膜层一侧,烘干,得到第二复合层;
(3)在第二复合层的EVA热熔胶层一侧涂布增粘剂,烘干,得到预涂膜;
所述步骤(1)采用网纹辊转移刮刀式涂布技术,在常温下将触感油涂布到BOPP薄膜的一侧,网纹辊为120线,当触感油涂层的厚度符合要求时,涂布结束,再将其置于60~70℃的温度下烘干1~1.5s,烘干后收卷,常温下放置熟化1~2h。
2.一种如权利要求1所述的超粘触感预涂膜的制备方法,包括如下步骤:
(1)将触感油涂布到BOPP薄膜的一侧,烘干,得到第一复合层;
(2)将EVA热熔胶颗粒熔化并复合在第一复合层的BOPP薄膜层一侧,烘干,得到第二复合层;
(3)在第二复合层的EVA热熔胶层一侧涂布增粘剂,烘干,得到预涂膜。
3.根据权利要求2所述的超粘触感预涂膜的制备方法,其特征在于,所述触感油的主要成分含有水性聚氨酯和二氧化硅。
4.根据权利要求2所述的超粘触感预涂膜的制备方法,其特征在于,其特征在于,所述增粘剂为硅烷偶联剂与甲醇的混合物。
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