CN110305618B - 一种玻璃瓶装饮品加工用耐水性标签胶的制备方法 - Google Patents
一种玻璃瓶装饮品加工用耐水性标签胶的制备方法 Download PDFInfo
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Abstract
本发明公开了一种玻璃瓶装饮品加工用耐水性标签胶的制备方法,涉及标签胶加工技术领域,包括以下步骤:(1)多聚谷氨酸的改性,(2)纳米填料的制备,(3)标签胶的制备;本发明所制标签胶适用于玻璃瓶装饮品的标签粘贴,干燥速度快(初干时间<5min),粘接强度高,并且耐水性好,能有效避免标签在潮湿环境下或者遇水后出现剥离现象,从而保证标签标识作用的正常发挥。
Description
技术领域:
本发明涉及标签胶加工技术领域,具体涉及一种玻璃瓶装饮品加工用耐水性标签胶的制备方法。
背景技术:
标签胶,又称商标胶,是指用来粘贴标签的粘合剂。大部分标签在印刷时都是无胶的,是通过刷粘合剂才赋予标签粘贴性,从而将标签粘贴到产品包装上。
最初的粘合剂以天然胶、动物胶为主,例如淀粉胶、酪素胶、鱼胶、骨胶等,其缺点是干燥慢,初粘力差,耐水性低,运输和贮存过程中标签易脱落。为了解决这一问题,人们对天然胶和动物胶进行了改性处理。
干酪素类标签胶虽然综合性能很好,但其成本较高。淀粉类标签胶虽然价格低廉,但粘结性补强,耐水性差。近年来开发出的化学胶虽然粘结性和耐水性强,但多以有机溶剂作为稀释剂,存在使用安全隐患的问题。
发明内容:
本发明所要解决的技术问题在于提供一种玻璃瓶装饮品加工用耐水性标签胶的制备方法,操作简单易行,所制标签胶的粘结性强且耐水性好。
本发明所要解决的技术问题采用以下的技术方案来实现:
一种玻璃瓶装饮品加工用耐水性标签胶的制备方法,包括以下步骤:
(1)多聚谷氨酸的改性:向多聚谷氨酸中加水搅拌至完全溶解,再加入N-羟甲基丙烯酰胺和浓硫酸,并加热至75-85℃进行酯化反应,反应结束后加入稀碱溶液调节溶液pH值至7-8,然后加入引发剂,加热至70-80℃进行聚合反应,反应结束后减压浓缩制成膏体,膏体经自然冷却至30℃以下时送入冷冻干燥机中,干燥所得固体经粉碎机制成微粉,即得改性多聚谷氨酸;
(2)纳米填料的制备:将纳米碳酸钙加热至100-110℃脱水至恒重,再于500-550℃下焙烧1-3h,即得纳米填料;
(3)标签胶的制备:向水中加入改性多聚谷氨酸、纳米填料、聚合硫酸铝和水性消泡剂,充分混合均匀,即得标签胶。
为了增强标签胶的耐水性能,本发明还对纳米填料进行了改性处理,具体技术方案如下:
一种玻璃瓶装饮品加工用耐水性标签胶的制备方法,包括以下步骤:
(1)多聚谷氨酸的改性:向多聚谷氨酸中加水搅拌至完全溶解,再加入N-羟甲基丙烯酰胺和浓硫酸,并加热至75-85℃进行酯化反应,反应结束后加入稀碱溶液调节溶液pH值至7-8,然后加入引发剂,加热至70-80℃进行聚合反应,反应结束后减压浓缩制成膏体,膏体经自然冷却至30℃以下时送入冷冻干燥机中,干燥所得固体经粉碎机制成微粉,即得改性多聚谷氨酸;
(2)纳米填料的制备:将纳米碳酸钙加热至100-110℃脱水至恒重,再于500-550℃下焙烧1-3h,待自然冷却至140℃以下时加入月桂酸单甘油酯,于125-135℃下保温混合,即得纳米填料;
(3)标签胶的制备:向水中加入改性多聚谷氨酸、纳米填料、聚合硫酸铝和水性消泡剂,充分混合均匀,即得标签胶。
所述稀碱溶液选用质量浓度5-10%的氢氧化钠水溶液。
所述引发剂选自过硫酸铵、过硫酸钾中的一种。
所述膏体的固含量为75-85%。
所述水性消泡剂选自有机硅消泡剂。
所述改性多聚谷氨酸中加入纳米填料、聚合硫酸铝、水性消泡剂的质量比为100:1-10:1-10:0.5-5。
所述纳米碳酸钙、月桂酸单甘油酯的质量比为10:0.5-5。
本发明的有益效果是:
(1)本发明利用多聚谷氨酸(多聚谷氨酸常规作为水处理用絮凝剂、保水剂使用)结构中所含羧基与N-羟甲基丙烯酰胺结构中所含羟基发生酯化反应,并在多聚谷氨酸结构中引入双键,再在引发剂存在下引发丙烯酰胺单体聚合得到丙烯酰胺改性多聚谷氨酸,从而改善多聚谷氨酸的胶粘性能。
(2)本发明利用月桂酸单甘油酯在熔融状态下渗入纳米碳酸钙的空间结构中,通过物理改性方式来增强纳米填料的填充性能,进而改善所制标签胶的使用性能。
(3)本发明以聚合硫酸铝作为助剂,聚合硫酸铝常规作为水处理用絮凝剂使用,而在本发明中聚合硫酸铝的添加是为了提高所制标签胶的使用性能。
(4)本发明所制标签胶适用于玻璃瓶装饮品的标签粘贴,干燥速度快(初干时间<5min),粘接强度高,并且耐水性好,能有效避免标签在潮湿环境下或者遇水后出现剥离现象,从而保证标签标识作用的正常发挥。
具体实施方式:
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体实施例,进一步阐述本发明。
以下实施例与对照例中的多聚谷氨酸选用南京轩凯生物技术有限公司的化妆品级多聚谷氨酸,纳米碳酸钙选用青州宇信钙业股份有限公司的平均粒径30nm、CaCO3含量≥95%的纳米碳酸钙,聚合硫酸铝选用沁阳市乐邦水处理材料有限公司的优质聚合硫酸铝,有机硅消泡剂选用南京全希化工有限公司的有机硅消泡剂QX-50。
实施例1
(1)多聚谷氨酸的改性:向28g多聚谷氨酸中加水搅拌至完全溶解,再加入21g N-羟甲基丙烯酰胺和0.5g浓硫酸,并加热至78℃进行酯化反应3h,反应结束后加入10%氢氧化钠水溶液调节溶液pH值至7,然后加入0.5g过硫酸钾,加热至75℃进行聚合反应2h,反应结束后减压浓缩制成固含量为82%的膏体,膏体经自然冷却至30℃以下时送入冷冻干燥机中,干燥所得固体经粉碎机制成微粉,即得改性多聚谷氨酸;
(2)纳米填料的制备:将纳米碳酸钙加热至100-110℃脱水至恒重,再于500-550℃下焙烧1-3h,即得纳米填料;
(3)标签胶的制备:向12g水中加入50g改性多聚谷氨酸、4g纳米填料、2g聚合硫酸铝和0.4g有机硅消泡剂,充分混合均匀,即得标签胶。
实施例2
(1)多聚谷氨酸的改性:向28g多聚谷氨酸中加水搅拌至完全溶解,再加入21g N-羟甲基丙烯酰胺和0.5g浓硫酸,并加热至78℃进行酯化反应3h,反应结束后加入10%氢氧化钠水溶液调节溶液pH值至7,然后加入0.5g过硫酸钾,加热至75℃进行聚合反应2h,反应结束后减压浓缩制成固含量为82%的膏体,膏体经自然冷却至30℃以下时送入冷冻干燥机中,干燥所得固体经粉碎机制成微粉,即得改性多聚谷氨酸;
(2)纳米填料的制备:将纳米碳酸钙加热至100-110℃脱水至恒重,再于500-550℃下焙烧1-3h,即得纳米填料;
(3)标签胶的制备:向12g水中加入50g改性多聚谷氨酸、5g纳米填料、2g聚合硫酸铝和0.4g有机硅消泡剂,充分混合均匀,即得标签胶。
实施例3
(1)多聚谷氨酸的改性:向28g多聚谷氨酸中加水搅拌至完全溶解,再加入21g N-羟甲基丙烯酰胺和0.5g浓硫酸,并加热至78℃进行酯化反应3h,反应结束后加入10%氢氧化钠水溶液调节溶液pH值至7,然后加入0.5g过硫酸钾,加热至75℃进行聚合反应2h,反应结束后减压浓缩制成固含量为82%的膏体,膏体经自然冷却至30℃以下时送入冷冻干燥机中,干燥所得固体经粉碎机制成微粉,即得改性多聚谷氨酸;
(2)纳米填料的制备:将4g纳米碳酸钙加热至105℃脱水至恒重,再于534℃下焙烧2h,待自然冷却至140℃以下时加入1.2g月桂酸单甘油酯,于128℃下保温混合15min,即得纳米填料;
(3)标签胶的制备:向12g水中加入50g改性多聚谷氨酸、4g纳米填料、2g聚合硫酸铝和0.4g有机硅消泡剂,充分混合均匀,即得标签胶。
对照例1
以实施例1为对照,设置不添加聚合硫酸铝的对照例1,其余操作与实施例1完全相同。
对照例2
以实施例1为对照,设置以等量多聚谷氨酸替代改性多聚谷氨酸的对照例2,其余操作与实施例1完全相同。
分别利用实施例1-3、对照例1-2制备标签胶,以专利CN201810827610.7实施例1所制标签胶作为对照例3。选用温州劲嘉彩印有限公司制作的同批啤酒标签纸,将标签纸裁成5cm×5cm,并将0.5g标签胶均匀涂布在标签纸上,然后将标签纸粘贴到同规格的啤酒瓶上。
粘结强度测试:使用ETM503A电子万能试验机测试粘结强度。
耐水性测试:将啤酒瓶于温度20℃、相对湿度70%的环境中放置24h,再分别放入温度5℃的冷水、45℃的热水中,每2h旋转玻璃瓶一次,观察有无标签纸脱落现象,并记录标签纸的脱落时间。
表1标签胶的使用情况
组别 | 粘结强度/N | 5℃耐水性/h | 45℃耐水性/h |
实施例1 | 247 | 164 | 92 |
实施例2 | 261 | 168 | 96 |
实施例3 | 295 | 186 | 110 |
对照例1 | 218 | 132 | 74 |
对照例2 | 143 | 34 | 8 |
对照例3 | 162 | 100 | 46 |
由表1可知,标签胶制备时聚合硫酸铝的添加、纳米碳酸钙的物理改性和多聚谷氨酸的化学改性均能相应增强标签胶的粘结强度和耐水性。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。
Claims (6)
1.一种玻璃瓶装饮品加工用耐水性标签胶的制备方法,其特征在于:包括以下步骤:
(1)多聚谷氨酸的改性:向多聚谷氨酸中加水搅拌至完全溶解,再加入N-羟甲基丙烯酰胺和浓硫酸,并加热至75-85℃进行酯化反应,反应结束后加入稀碱溶液调节溶液pH值至7-8,然后加入引发剂,加热至70-80℃进行聚合反应,反应结束后减压浓缩制成膏体,膏体经自然冷却至30℃以下时送入冷冻干燥机中,干燥所得固体经粉碎机制成微粉,即得改性多聚谷氨酸;
(2)纳米填料的制备:将纳米碳酸钙加热至100-110℃脱水至恒重,再于500-550℃下焙烧1-3h,待自然冷却至140℃以下时加入月桂酸单甘油酯,于125-135℃下保温混合,即得纳米填料;
(3)标签胶的制备:向水中加入改性多聚谷氨酸、纳米填料、聚合硫酸铝和水性消泡剂,充分混合均匀,即得标签胶。
2.根据权利要求1所述的玻璃瓶装饮品加工用耐水性标签胶的制备方法,其特征在于:所述稀碱溶液选用质量浓度5-10%的氢氧化钠水溶液。
3.根据权利要求1所述的玻璃瓶装饮品加工用耐水性标签胶的制备方法,其特征在于:所述引发剂选自过硫酸铵、过硫酸钾中的一种。
4.根据权利要求1所述的玻璃瓶装饮品加工用耐水性标签胶的制备方法,其特征在于:所述膏体的固含量为75-85%。
5.根据权利要求1所述的玻璃瓶装饮品加工用耐水性标签胶的制备方法,其特征在于:所述水性消泡剂选自有机硅消泡剂。
6.根据权利要求1所述的玻璃瓶装饮品加工用耐水性标签胶的制备方法,其特征在于:所述改性多聚谷氨酸中加入纳米填料、聚合硫酸铝、水性消泡剂的质量比为100:1-10:1-10:0.5-5。
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