CN113403879A - 一种无膜金属型包装纸及其制备方法 - Google Patents

一种无膜金属型包装纸及其制备方法 Download PDF

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CN113403879A
CN113403879A CN202110574392.2A CN202110574392A CN113403879A CN 113403879 A CN113403879 A CN 113403879A CN 202110574392 A CN202110574392 A CN 202110574392A CN 113403879 A CN113403879 A CN 113403879A
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CN113403879B (zh
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李哲
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Yuyao Kangle Colorful Printed Package Co ltd
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Abstract

本申请涉及包装纸的领域,更具体地说,它涉及一种无膜金属型包装纸及其制备方法。无膜金属型包装纸,由上至下依次包括基纸层、粘结层、防水铜版纸层、镀铝承载层涂料、镀铝层、适印保护层;所述镀铝承载层涂料,按质量分数计,由包括以下重量份的原料制成:丙烯酸乳液50‑60份、丙烯酸树脂16‑20份、增塑剂1‑2份、氨水1‑3份、溶剂24‑36份。其制备方法为:S1、制备镀铝承载层涂料;S2、涂布镀铝承载层涂料;S3、镀铝;S4:涂布水性涂料;S5:回潮烫平;S6:粘合。本申请具有提高金银卡纸的抗裂性的效果。

Description

一种无膜金属型包装纸及其制备方法
技术领域
本申请涉及包装纸的领域,更具体地说,它涉及一种无膜金属型包装纸及其制备方法。
背景技术
在娱乐场所、广告行业、酒店及工艺品业广泛使用的五颜六色、闪闪发光的卡纸,这种卡纸是因为色层与纸之间镀有一层200~400A的铝分子层,在光的照射下,经光的反射、折射而形成的视觉效果。
传统的金银卡纸表面通常具有PET膜,从而丢弃后容易造成环境污染,且回收再造时需要将膜去除。
因此,现通过转移法制得金银卡纸,使镀铝层通过转移膜镀至纸面上,从而无需在金银卡纸表面贴合PET膜,可直接回收造纸,其制备过程为:(1)转移膜的制作:在塑料薄膜上涂布离型模压涂料,形成转移膜;(2)镀铝:在上述转移膜上镀上铝层;(3)贴合转移:将成卷的镀有铝层的转移膜放在放卷装置上,转移膜通过贴合装置时与预先涂布有胶粘剂的承印物(如纸张)贴合,其铝层与胶粘剂粘结,接着使胶粘剂固化,然后由剥离装置将塑料薄膜剥离,剥离下来的塑料薄膜由收卷装置收卷,这样,铝层及便转移到承印物上,得到转移镀铝纸。
但是,现有的通过转移法制得的金银卡纸,在实际使用过程中发现其表面质地较硬,容易爆裂。
发明内容
为了提高金银卡纸的抗裂性,本发明提供一种无膜金属型包装纸及其制备方法,其具有卡纸抗裂性好的特点。
第一方面,本申请提供的一种无膜金属型包装纸,采用如下的技术方案:
一种无膜金属型包装纸,由上至下依次包括基纸层、粘结层、防水铜版纸层、镀铝承载层涂料、镀铝层、适印保护层;
所述镀铝承载层涂料,按质量分数计,由包括以下重量份的原料制成:丙烯酸乳液50-60份、丙烯酸树脂16-20份、增塑剂1-2份、氨水1-3份、溶剂25-30份。
通过采用上述技术方案,丙烯酸乳液和丙烯酸树脂形成的基料可作为较好镀铝承载涂料,进一步加入氨水可调节丙烯酸乳液的pH,同时使丙烯酸涂料在固化后仍具有良好的韧性,使包装纸不易爆裂,从而提升包装纸的抗裂性;
在配方中增加增塑剂可提升丙烯酸乳液和丙烯酸树的延展性和柔韧性,从而使涂料固化后保持一定的柔软性,使包装纸不易爆裂,从而提升包装纸的抗裂性。
优选的,所述溶剂由无水乙醇、水、醋酸乙酯、醋酸丁酯按照(1-2):(1-1.5):(1-1.5):(0.8-1)的重量比组成。
通过采用上述技术方案,采用无水乙醇、水、醋酸乙酯、醋酸丁酯的组合溶剂,使配方中的各原料具有较好相容性。
优选的,所述溶剂由无水乙醇、水、醋酸乙酯、醋酸丁酯按照1:1:1:0.8的重量比组成。
通过采用上述技术方案,采用无水乙醇、水、醋酸乙酯、醋酸丁酯的组合溶剂,使配方中的各原料具有较好相容性。
优选的,无水乙醇15-17份、蒸馏水10-13份、所述增塑剂为邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二辛酯中的一种或多种的组合。
优选的,还包括丙三醇三缩水甘油醚5-8份。
通过采用上述技术方案,丙三醇三缩水甘油醚可作为稀释剂,一方面与丙烯酸乳液和丙烯酸树脂形成的基料作用,可提升一定阻燃性,从而提升耐热性,同时还具有降粘、流平和增韧作用,从而使丙烯酸涂料在固化后仍具有良好的韧性,使包装纸不易爆裂,从而提升包装纸的抗裂性。
优选的,所述镀铝层的厚度为
Figure BDA0003083787890000021
第二方面,本申请提供一种无膜金属型包装纸的制备方法,采用如下的技术方案:一种无膜金属型包装纸的制备方法,包括以下步骤:
S1、制备镀铝承载层涂料
按配比将丙烯酸乳液、丙烯酸树脂、溶剂、增塑剂、氨水、丙三醇三缩水甘油醚均匀混合,得到镀铝承载层涂料;
S2、涂布镀铝承载层涂料
在防水铜版纸表面涂布镀铝承载涂料,在防水铜版纸上形成镀铝承载层,并烘干收卷,制得承载铜版纸;
S3、镀铝
在承载铜版纸的镀铝承载层表面镀铝,在镀铝承载层上形成镀铝层,制得镀铝铜版纸;
S4:涂布水性涂料
用涂布机在S3中制得的镀铝铜版纸的镀铝层表面涂布水性涂料,在镀铝层上形成适印保护层,并烘干,制得适印铜版纸;
S5:回潮烫平
对适印铜版纸进行蒸汽回潮烫平,制得复合铜版纸;
S6:粘合
在复合铜版纸背面涂胶,并与基纸复合、烘干、冷却,得到无膜金属型包装纸。
通过采用上述技术方案,具有工序简单、便于操作,能够实现无膜金属型包装纸的量化生产。
优选的,S4中,在镀铝层上形成适印保护层,并烘干后,对适印铜版纸进行蒸汽回潮烫平,制得复合铜版纸。
优选的,回潮烫平的复合铜版纸的含水率为7%±0.5%。
通过采用上述技术方案,控制含水率使无膜金属型包装纸在确保强度的同时具有一定的韧性,从而提升包装纸的抗裂性。
综上所述,本申请具有以下有益效果:
1、由于丙烯酸乳液和丙烯酸树脂形成的基料可作为较好镀铝承载涂料,进一步加入氨水可调节丙烯酸乳液的pH,同时使丙烯酸涂料在固化后仍具有良好的韧性,使包装纸不易爆裂,从而提升包装纸的抗裂性。
2、本申请中在配方中增加增塑剂可提升丙烯酸乳液和丙烯酸树的延展性和柔韧性,从而使涂料固化后保持一定的柔软性,使包装纸不易爆裂,从而提升包装纸的抗裂性。
3、丙三醇三缩水甘油醚可作为稀释剂,一方面与丙烯酸乳液和丙烯酸树脂形成的基料作用,可提升一定阻燃性,从而提升耐热性,同时还具有降粘、流平和增韧作用,从而使丙烯酸涂料在固化后仍具有良好的韧性,使包装纸不易爆裂,从而提升包装纸的抗裂性。
具体实施方式
制备例和实施例中所使用的原料均可通过市售获得。其中:
丙烯酸乳液采购自北京华威锐科化工有限公司,牌号为HWG21548;
丙烯酸树脂采购自佰一,牌号为丙烯酸树脂AR-626W;
氨水采购自初鑫,牌号为cx185。
镀铝承载层涂料的制备例
制备例1-18
如表1所示,制备例1-18的主要区别在于原料的配比不同,
以下以制备例1为例进行说明,其中增塑剂为邻苯二甲酸二辛酯,各原料添加量的单位均为kg。另外,制备例6中的增塑剂为邻苯二甲酸二甲酯。
制备例1提供的镀铝承载层涂料的制备方法为:按配比将丙烯酸乳液、丙烯酸树脂、溶剂、邻苯二甲酸二乙酯、氨水均匀混合,得到镀铝承载层涂料。
表1原料成分和配比表
Figure BDA0003083787890000051
Figure BDA0003083787890000061
实施例
实施例1
一种无膜金属型包装纸,由上至下依次包括基纸层、粘结层、防水铜版纸层、镀铝承载层涂料、镀铝层、适印保护层。
实施例1提供的无膜金属型包装纸的制备方法如下:
S1、制备镀铝承载层涂料
取制备例1所制得的镀铝承载层涂料;
S2、涂布镀铝承载层涂料
用涂布机在防水铜版纸表面涂布镀铝承载涂料,在防水铜版纸上形成镀铝承载层,并烘干收卷,制得承载铜版纸;
涂布机的涂布速度为140m/min;涂布机的烘箱温度为120℃,烘干时间为4h;涂布机的收卷冷却温度为14℃;
S3、镀铝
用真空镀铝机在承载铜版纸的镀铝承载层表面镀铝,在镀铝承载层上形成镀铝层,制得镀铝铜版纸;真空镀铝机的真空度为5×10-4pa,镀铝层的厚度为
Figure BDA0003083787890000062
S4:涂布水性涂料
用涂布机在镀铝铜版纸的镀铝层表面涂布丙烯酸乳液,在镀铝层上形成适印保护层,并烘干,制得适印铜版纸;
涂布机的涂布速度为150m/min、涂布机的烘箱温度为120℃,烘干时间为3h;
S5:回潮烫平
用回潮烫平机对复合铜版纸进行蒸汽回潮烫平,控制适印铜版纸的含水率于7%±0.5%、每平方米的曲翘小于1mm,制得复合铜版纸;
S6:粘合
用湿式复合机在S5中制得的复合铜版纸背面涂胶,并与基纸复合、烘干、冷却,得到无膜金属型包装纸;
湿式复合机的复合速度为110m/min;湿式复合机的烘箱温度为110℃,烘干时间为4h;湿式复合机的冷却温度为20℃。
实施例2
实施例2与实施例1的区别在于,采用制备例2所制得的镀铝承载层涂料。
实施例3
实施例3与实施例1的区别在于,采用制备例3所制得的镀铝承载层涂料。
实施例4
实施例4与实施例1的区别在于,采用制备例4所制得的镀铝承载层涂料。
实施例5
实施例5与实施例1的区别在于,采用制备例5所制得的镀铝承载层涂料。
实施例6
实施例6与实施例1的区别在于,采用制备例6所制得的镀铝承载层涂料。
实施例7
实施例7与实施例1的区别在于,采用制备例7所制得的镀铝承载层涂料。
实施例8
实施例8与实施例1的区别在于,采用制备例8所制得的镀铝承载层涂料。
实施例9
实施例9与实施例1的区别在于,采用制备例9所制得的镀铝承载层涂料。
实施例10
实施例10与实施例1的区别在于,采用制备例10所制得的镀铝承载层涂料。
实施例11
实施例11与实施例1的区别在于,采用制备例11所制得的镀铝承载层涂料。
实施例12
实施例12与实施例1的区别在于,采用制备例12所制得的镀铝承载层涂料。
实施例13
实施例13与实施例1的区别在于,采用制备例13所制得的镀铝承载层涂料。
实施例14
实施例14与实施例1的区别在于,采用制备例14所制得的镀铝承载层涂料。
实施例15
实施例15与实施例1的区别在于,采用制备例15所制得的镀铝承载层涂料。
实施例16
实施例16与实施例1的区别在于,采用制备例16所制得的镀铝承载层涂料。
对比例
对比例1
与实施例1的区别在于制备方法不同,S3、镀铝中采用转移蒸镀法镀铝。
对比例2
与实施例1的区别在于,采用制备例17所制得的镀铝承载层涂料。
对比例3
与实施例1的区别在于,采用制备例18所制得的镀铝承载层涂料。
性能检测试验
一、抗裂性
参照BB/T0054-2010《中华人民共和国包装行业标准:真空镀铝纸》5.4.6中的方法进行测试,以抗裂指数(横向)表征,单位:mN·m2/g,检测结果见表2。
二、耐热性
参照BB/T0054-2010《中华人民共和国包装行业标准:真空镀铝纸》5.4.11中的方法进行测试,以耐热温度表征,单位:℃,检测结果见表2。
表2性能检测结果表
Figure BDA0003083787890000091
Figure BDA0003083787890000101
本具体实施例仅仅是对本申请的解释,其并不是对本申请的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改,但只要在本申请的权利要求范围内都受到专利法的保护。

Claims (9)

1.一种无膜金属型包装纸,其特征在于,由上至下依次包括基纸层、粘结层、防水铜版纸层、镀铝承载层涂料、镀铝层、适印保护层;
所述镀铝承载层涂料,按质量分数计, 由包括以下重量份的原料制成:丙烯酸乳液50-60份、丙烯酸树脂16-20份、增塑剂1-2份、氨水1-3份、溶剂24-36份。
2.根据权利要求1所述的无膜金属型包装纸,其特征在于,所述溶剂由无水乙醇、水、醋酸乙酯、醋酸丁酯按照(1-2):(1-1.5):(1-1.5):(0.8-1)的重量比组成。
3.根据权利要求2所述的无膜金属型包装纸,其特征在于,所述溶剂由无水乙醇、水、醋酸乙酯、醋酸丁酯按照1:1:1:0.8的重量比组成。
4.根据权利要求1所述的无膜金属型包装纸,其特征在于,无水乙醇15-17份、蒸馏水10-13份、所述增塑剂为邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二辛酯中的一种或多种的组合。
5.根据权利要求1所述的无膜金属型包装纸,其特征在于,还包括丙三醇三缩水甘油醚5-8份。
6.根据权利要求1所述的无膜金属型包装纸,其特征在于,所述镀铝层的厚度为315 Å-385 Å。
7.一种权利要求1-6任一项所述的无膜金属型包装纸的制备方法,其特征在于,包括以下步骤:
S1、制备镀铝承载层涂料
按配比将丙烯酸乳液、丙烯酸树脂、溶剂、增塑剂、氨水、丙三醇三缩水甘油醚均匀混合,得到镀铝承载层涂料;
S2、涂布镀铝承载层涂料
在防水铜版纸表面涂布镀铝承载涂料,在防水铜版纸上形成镀铝承载层,并烘干收卷,制得承载铜版纸;
S3、镀铝
在承载铜版纸的镀铝承载层表面镀铝,在镀铝承载层上形成镀铝层,制得镀铝铜版纸;
S4:涂布水性涂料
用涂布机在S3中制得的镀铝铜版纸的镀铝层表面涂布水性涂料,在镀铝层上形成适印保护层,并烘干,制得适印铜版纸;
S5:回潮烫平
对适印铜版纸进行蒸汽回潮烫平,制得复合铜版纸;
S6:粘合
在复合铜版纸背面涂胶,并与基纸复合、烘干、冷却,得到无膜金属型包装纸。
8.根据权利要求7所述的制备方法,其特征在于,S4中,在镀铝层上形成适印保护层,并烘干后,对适印铜版纸进行蒸汽回潮烫平,制得复合铜版纸。
9.根据权利要求8所述的制备方法,其特征在于,回潮烫平的复合铜版纸的含水率为7%±0.5%。
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