CN111331932B - 一种高强度复合型瓦楞纸板及其生产工艺 - Google Patents

一种高强度复合型瓦楞纸板及其生产工艺 Download PDF

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CN111331932B
CN111331932B CN202010262185.9A CN202010262185A CN111331932B CN 111331932 B CN111331932 B CN 111331932B CN 202010262185 A CN202010262185 A CN 202010262185A CN 111331932 B CN111331932 B CN 111331932B
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赵江鑫
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Zhejiang Yiming Packaging Printing Co ltd
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Abstract

本发明公开一种高强度复合型瓦楞纸板，将改性淀粉基膜通过环保胶粘剂粘附在面纸表面，控制环保胶粘剂在面纸表面的涂布量为5g/m2，之后将面纸和内纸分别粘接在硬质瓦楞纸层上下表面，制得复合瓦楞纸半成品；将复合瓦楞纸半成品放入烘缸中，控制温度为115℃，水份为3％，静置24小时制得所述高强度复合型瓦楞纸板；本发明还公开了一种高强度复合型瓦楞纸板的生产工艺；复合型瓦楞纸板具有高强度，将改性淀粉和聚乙烯醇交联制得复合膜，改性淀粉和聚乙烯醇分子链中都含有大量的羟基，所以改性淀粉与聚乙烯醇交联制得的复合膜具有较强的亲水性能，而且淀粉分子中羟基的缔合作用减弱使得其加工耐热性增强。

Description

一种高强度复合型瓦楞纸板及其生产工艺
技术领域
本发明属于瓦楞纸制备技术领域，具体为一种高强度复合型瓦楞纸板及其生产工艺。
背景技术
由于瓦楞纸板箱与其他材料的包装容器相比，具有防震好、易制造、可印刷、重量轻、强度高、可回收再生的优点，在包装领域中得到广泛的应用，如冰箱、空调器、电视机等较重物品和玻璃、瓷器、工艺品等易碎物品的包装运输。常用的瓦楞纸板箱是由普通瓦楞纸板制成，这种普通瓦楞纸板由至少两层平面纸板和夹在两个平面纸板之间的瓦楞芯纸组成。由于瓦楞芯纸是由质软瓦楞原纸制成，而纸板的抗压强度主要由瓦楞芯纸决定，因此普通的瓦楞纸板抗压强度欠佳，竖直立放受压时，瓦楞纸板容易弯折变形。若采用牛皮纸制作瓦楞芯纸，则成本太高，而强度仍然不够。由于瓦楞纸板强度和瓦楞纸板厚度成正比，为增加强度，现有的办法就是加厚纸板，这样，势必会使箱体体积增大，减少了可利用空间，同时也增加了生产成本。
SBS作为一种热塑性弹性体材料，具有其特征的微相分离结构，即同时包含聚苯乙烯的塑料结构，拥有很好的刚性，又含有聚丁二烯相的橡胶结构，使其具有良好的弹性和可塑性；
中国发明专利CN101705642B一种高缓冲高强度瓦楞纸板，其包括外层面纸、瓦楞芯纸、里层面纸，其特征在于：瓦楞芯纸至少为两层，其中一层瓦楞芯纸为V形瓦楞芯纸，另一层瓦楞芯纸为圆筒状瓦楞芯纸，两层瓦楞芯纸之间为夹芯纸。本发明与普通多层瓦楞纸板相比，具有缓冲性能好、强度高、粘合强度好、成本低等优点，可以代替部分七层瓦楞纸板制作大型包装运输瓦楞纸箱。
发明内容
为了克服上述的技术问题，本发明提供一种高强度复合型瓦楞纸板及其生产工艺。
本发明所要解决的技术问题：
(1)现有技术中对淀粉进行交联改性，在化学交联改性过程中会出现糊化等现象，影响改性淀粉与聚乙烯醇的复合；
(2)SBS作为胶粘剂使用时，由于其分子链低，所以在使用时存在初粘力低，粘结强度低的问题；而且甲苯具有一定的毒性，所以无法单独作为有机溶剂进行使用。
本发明的目的可以通过以下技术方案实现：
一种高强度复合型瓦楞纸板，从上往下依次为改性淀粉基膜、面纸、硬质瓦楞纸层和内纸；所述改性淀粉基膜通过环保胶粘剂粘附在面纸表面；
所述改性淀粉基膜由如下方法制成：
(1)将淀粉、碳酸钠和硝酸钠按照100∶2-3∶1-1.5的重量比加入烧杯中混合，加入去离子水，控制淀粉和去离子水的重量比为1∶8-10，磁力搅拌15-30min后转移至微波炉中，控制微波炉的功率为500W，每加热2min，冷却5min，循环3次，之后调节pH，直至pH＝7，抽滤、洗涤、干燥，制得改性淀粉；
(2)将聚乙烯醇加入去离子水中，加热至85-90℃并磁力搅拌，加入步骤(1)制备的改性淀粉，以240r/min的转速搅拌30min，之后依次加入丙三醇和单硬脂酸甘油酯，继续搅拌，直至形成均一的成膜液，之后倒在玻璃模具中，在45-50℃下干燥20-24h，揭膜，制得改性淀粉基膜，控制聚乙烯醇、去离子水、改性淀粉、丙三醇和单硬脂酸甘油酯的重量比为1∶10∶1∶0.5∶0.3。
步骤(1)将淀粉进行改性，所以为了防止淀粉在化学交联改性过程中出现糊化等现象，之后将淀粉、碳酸钠和硝酸钠按照100∶2-3∶1-1.5的重量比进行混合，之后通过间歇式微波进行交联改性，而且微波交联后淀粉的颗粒结构不会被破坏，改性后淀粉附着性升高，而且淀粉改性后能够削弱淀粉分子中羟基的缔合作用，之后步骤(2)将改性淀粉和聚乙烯醇交联制得复合膜，改性淀粉和聚乙烯醇分子链中都含有大量的羟基，所以改性淀粉与聚乙烯醇交联制得的复合膜具有较强的亲水性能，而且淀粉分子中羟基的缔合作用减弱使得其加工耐热性增强，而且改性后淀粉附着性升高，所以当其与聚乙烯醇交联制得复合膜的整体性升高，防止出现分层脱落等现象，淀粉作为生物质原料，具有优异的生物降解性能，所以能够赋予该复合膜优异的环保降解性能。
进一步地，所述环保胶粘剂由如下重量份原料制成：150-180份SBS树脂，20-45份甲苯，15-30份十二硫醇，250-300份乙酸乙酯，300-350份汽油，0.5-3份引发剂，3.5-5.0份马来酸酐，2-3份对苯二酚，1-3份松香。
进一步地，所述环保胶粘剂由如下方法制成：
(1)将SBS粉碎加入三口烧瓶中，通入氮气，升温至75℃进行预热，之后将甲苯、十二硫醇、乙酸乙酯和汽油混合加入烧杯中，40-45℃水浴加热并磁力搅拌，之后加入引发剂，升温至55-60℃，并以120-140r/min的转速搅拌20-30min，之后升温至75-80℃，在此温度下反应1h，制得混合物A；
(2)将混合物A通过蠕动泵滴加至三口烧瓶中，控制滴加时间为2h，滴加结束后加入马来酸酐并在75℃下保温5-6h，磁力搅拌直至粘度为4000-5000cp，之后加入对苯二酚，5-10min后加入松香，继续保温30min，降温出料，制得环保胶粘剂。
SBS作为胶粘剂使用时，由于其分子链低，所以在使用时存在初粘力低，粘结强度低的问题；甲苯具有一定的毒性所以步骤(1)中通过将甲苯、十二硫醇、乙酸乙酯和汽油混合制备出一种混合溶剂，一方面该溶剂具有一定的粘度有着良好的施工性能，另一方面防止以甲苯作为纯溶剂导致毒性过强，而且苯含量远低于国家标准，也不含卤代烃成分，所以更加环保；步骤(2)中通过加入马来酸酐对其进行改性，SBS上含有大量双键，所以通过将马来酸酐接枝在SBS上，能够改善其极性和分子结构，进而提高其粘结和耐水性能，而且双键断裂也能够提高该胶粘剂的耐热耐氧化性能，所以本发明制备出的环保胶粘剂既具有优异的环保性能，又具有良好的粘结和耐水性能以及耐热耐氧化性能。
进一步地，所述引发剂为过氧化苯甲酰、异丙苯过氧化氢和过氧化环己酮中的一种或两种。
进一步地，所述硬质瓦楞纸层由如下方法制成：将瓦楞纸浸泡在固体石蜡、二氧化硅和液体石蜡按照5∶2∶1的重量比混合而成的硬化液中，浸泡30min后取出烘干，制得硬质瓦楞纸层。
一种高强度复合型瓦楞纸板的生产工艺，包括如下步骤：
第一步、将改性淀粉基膜通过环保胶粘剂粘附在面纸表面，控制环保胶粘剂在面纸表面的涂布量为5-8g/m2，之后将面纸和内纸分别粘接在硬质瓦楞纸层上下表面，制得复合瓦楞纸半成品；
第二步、将复合瓦楞纸半成品放入烘缸中，控制温度为115-120℃，水份为3-5％，静置24小时制得所述高强度复合型瓦楞纸板。
本发明的有益效果：
(1)本发明高强度复合型瓦楞纸板从上往下依次为改性淀粉基膜、面纸、硬质瓦楞纸层和内纸，硬质瓦楞纸层通过将瓦楞纸浸泡在固体石蜡、二氧化硅和液体石蜡按照5∶2∶1的重量比混合而成的硬化液中，浸泡30min后取出烘干，制得硬质瓦楞纸层，所以通过其制备出的复合型瓦楞纸板具有高强度，将改性淀粉和聚乙烯醇交联制得复合膜，改性淀粉和聚乙烯醇分子链中都含有大量的羟基，所以改性淀粉与聚乙烯醇交联制得的复合膜具有较强的亲水性能，而且淀粉分子中羟基的缔合作用减弱使得其加工耐热性增强，而且改性后淀粉附着性升高，所以当其与聚乙烯醇交联制得复合膜的整体性升高，防止出现分层脱落等现象，淀粉作为生物质原料，具有优异的生物降解性能，所以能够赋予该复合膜优异的环保降解性能；解决了现有技术中对淀粉进行交联改性，在化学交联改性过程中会出现糊化等现象，影响改性淀粉与聚乙烯醇的复合的技术问题；
(2)本发明制备出一种环保胶粘剂，制备过程中步骤(1)中通过将甲苯、十二硫醇、乙酸乙酯和汽油混合制备出一种混合溶剂，一方面该溶剂具有一定的粘度有着良好的施工性能，另一方面防止以甲苯作为纯溶剂导致毒性过强，而且苯含量远低于国家标准，也不含卤代烃成分，所以更加环保；步骤(2)中通过加入马来酸酐对其进行改性，SBS上含有大量双键，所以通过将马来酸酐接枝在SBS上，能够改善其极性和分子结构，进而提高其粘结和耐水性能，而且双键断裂也能够提高该胶粘剂的耐热耐氧化性能，所以本发明制备出的环保胶粘剂既具有优异的环保性能，又具有良好的粘结和耐水性能以及耐热耐氧化性能，解决了SBS作为胶粘剂使用时，由于其分子链低，所以在使用时存在初粘力低，粘结强度低的问题；而且甲苯具有一定的毒性，所以无法单独作为有机溶剂进行使用的技术问题。
具体实施方式
下面将结合本发明实施例，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
实施例1
一种高强度复合型瓦楞纸板的生产工艺，包括如下步骤：
第一步、将改性淀粉基膜通过环保胶粘剂粘附在面纸表面，控制环保胶粘剂在面纸表面的涂布量为5g/m2，之后将面纸和内纸分别粘接在硬质瓦楞纸层上下表面，制得复合瓦楞纸半成品；
第二步、将复合瓦楞纸半成品放入烘缸中，控制温度为115℃，水份为3％，静置24小时制得所述高强度复合型瓦楞纸板。
所述改性淀粉基膜由如下方法制成：
(1)将淀粉、碳酸钠和硝酸钠按照100∶2∶1的重量比加入烧杯中混合，加入去离子水，控制淀粉和去离子水的重量比为1∶8，磁力搅拌15min后转移至微波炉中，控制微波炉的功率为500W，每加热2min，冷却5min，循环3次，之后调节pH，直至pH＝7，抽滤、洗涤、干燥，制得改性淀粉；
(2)将聚乙烯醇加入去离子水中，加热至85℃并磁力搅拌，加入步骤(1)制备的改性淀粉，以240r/min的转速搅拌30min，之后依次加入丙三醇和单硬脂酸甘油酯，继续搅拌，直至形成均一的成膜液，之后倒在玻璃模具中，在45℃下干燥20h，揭膜，制得改性淀粉基膜，控制聚乙烯醇、去离子水、改性淀粉、丙三醇和单硬脂酸甘油酯的重量比为1∶10∶1∶0.5∶0.3。
环保胶粘剂由如下重量份原料制成：150份SBS树脂，20份甲苯，15份十二硫醇，250份乙酸乙酯，300份汽油，0.5份过氧化苯甲酰，3.5份马来酸酐，2份对苯二酚，1份松香。
环保胶粘剂由如下方法制成：
(1)将SBS粉碎加入三口烧瓶中，通入氮气，升温至75℃进行预热，之后将甲苯、十二硫醇、乙酸乙酯和汽油混合加入烧杯中，40℃水浴加热并磁力搅拌，之后加入过氧化苯甲酰，升温至55℃，并以120r/min的转速搅拌20min，之后升温至75℃，在此温度下反应1h，制得混合物A；
(2)将混合物A通过蠕动泵滴加至三口烧瓶中，控制滴加时间为2h，滴加结束后加入马来酸酐并在75℃下保温5h，磁力搅拌直至粘度为4000cp，之后加入对苯二酚，5min后加入松香，继续保温30min，降温出料，制得环保胶粘剂。
实施例2
环保胶粘剂由如下重量份原料制成：160份SBS树脂，25份甲苯，20份十二硫醇，280份乙酸乙酯，320份汽油，1份引发剂，4份马来酸酐，2份对苯二酚，2份松香。
所述环保胶粘剂由如下方法制成：
(1)将SBS粉碎加入三口烧瓶中，通入氮气，升温至75℃进行预热，之后将甲苯、十二硫醇、乙酸乙酯和汽油混合加入烧杯中，40℃水浴加热并磁力搅拌，之后加入过氧化苯甲酰，升温至55℃，并以120r/min的转速搅拌20min，之后升温至75℃，在此温度下反应1h，制得混合物A；
(2)将混合物A通过蠕动泵滴加至三口烧瓶中，控制滴加时间为2h，滴加结束后加入马来酸酐并在75℃下保温5h，磁力搅拌直至粘度为4000cp，之后加入对苯二酚，5min后加入松香，继续保温30min，降温出料，制得环保胶粘剂。
其余同实施例1。
实施例3
环保胶粘剂由如下重量份原料制成：170份SBS树脂，40份甲苯，25份十二硫醇，280份乙酸乙酯，340份汽油，2份引发剂，4.5份马来酸酐，3份对苯二酚，2份松香。
所述环保胶粘剂由如下方法制成：
(1)将SBS粉碎加入三口烧瓶中，通入氮气，升温至75℃进行预热，之后将甲苯、十二硫醇、乙酸乙酯和汽油混合加入烧杯中，40℃水浴加热并磁力搅拌，之后加入过氧化苯甲酰，升温至55℃，并以120r/min的转速搅拌20min，之后升温至75℃，在此温度下反应1h，制得混合物A；
(2)将混合物A通过蠕动泵滴加至三口烧瓶中，控制滴加时间为2h，滴加结束后加入马来酸酐并在75℃下保温5h，磁力搅拌直至粘度为4000cp，之后加入对苯二酚，5min后加入松香，继续保温30min，降温出料，制得环保胶粘剂。
其余同实施例1。
实施例4
环保胶粘剂由如下重量份原料制成：180份SBS树脂，45份甲苯，30份十二硫醇，300份乙酸乙酯，350份汽油，3份引发剂，5.0份马来酸酐，3份对苯二酚，3份松香。
所述环保胶粘剂由如下方法制成：
(1)将SBS粉碎加入三口烧瓶中，通入氮气，升温至75℃进行预热，之后将甲苯、十二硫醇、乙酸乙酯和汽油混合加入烧杯中，40℃水浴加热并磁力搅拌，之后加入过氧化苯甲酰，升温至55℃，并以120r/min的转速搅拌20min，之后升温至75℃，在此温度下反应1h，制得混合物A；
(2)将混合物A通过蠕动泵滴加至三口烧瓶中，控制滴加时间为2h，滴加结束后加入马来酸酐并在75℃下保温5h，磁力搅拌直至粘度为4000cp，之后加入对苯二酚，5min后加入松香，继续保温30min，降温出料，制得环保胶粘剂。
其余同实施例1。
对比例1
本对比例与实施例1相比，未对淀粉进行改性，制备方法如下所示：
所述淀粉基膜由如下方法制成：
将聚乙烯醇加入去离子水中，加热至85℃并磁力搅拌，加入淀粉，以240r/min的转速搅拌30min，之后依次加入丙三醇和单硬脂酸甘油酯，继续搅拌，直至形成均一的成膜液，之后倒在玻璃模具中，在45℃下干燥20h，揭膜，制得改性淀粉基膜，控制聚乙烯醇、去离子水、淀粉、丙三醇和单硬脂酸甘油酯的重量比为1∶10∶1∶0.5∶0.3。
一种高强度复合型瓦楞纸板的生产工艺，包括如下步骤：
第一步、将淀粉基膜通过环保胶粘剂粘附在面纸表面，控制环保胶粘剂在面纸表面的涂布量为5g/m2，之后将面纸和内纸分别粘接在硬质瓦楞纸层上下表面，制得复合瓦楞纸半成品；
第二步、将复合瓦楞纸半成品放入烘缸中，控制温度为115℃，水份为3％，静置24小时制得所述高强度复合型瓦楞纸板。
对比例2
本对比例与实施例1相比，用SBS胶代替环保胶粘剂，制备方法如下所示：
第一步、将改性淀粉基膜通过SBS胶粘附在面纸表面，控制SBS胶在面纸表面的涂布量为5g/m2，之后将面纸和内纸分别粘接在硬质瓦楞纸层上下表面，制得复合瓦楞纸半成品；
第二步、将复合瓦楞纸半成品放入烘缸中，控制温度为115℃，水份为3％，静置24小时制得所述高强度复合型瓦楞纸板。
对比例3
本对比例为市场中一种高强度瓦楞纸板。
对实施例1-4和对比例1-3的边压强度、环压指数和降解性进行检测，结果如下表1所示；
表1
边压强度(N/cm) 环压指数(N·m/g) 60天降解率(％)
实施例1 155 9.2 58.3
实施例2 156 9.2 58.5
实施例3 155 9.3 58.8
实施例4 158 9.3 58.8
对比例1 150 9.0 26.8
对比例2 128 8.2 55.6
对比例3 120 7.6 32
从上表1中能够看出实施例1-4的边压强度为155-158(N/cm)，环压指数为9.2-9.3(N·m/g)，60天降解率为58.3-58.8，对比例1-3的边压强度为120-150(N/cm)，环压指数为9.6-9.0(N·m/g)，60天降解率为26.8-55.6；所以所以通过其制备出的复合型瓦楞纸板具有高强度，将改性淀粉和聚乙烯醇交联制得复合膜，改性淀粉和聚乙烯醇分子链中都含有大量的羟基，所以改性淀粉与聚乙烯醇交联制得的复合膜具有较强的亲水性能，而且淀粉分子中羟基的缔合作用减弱使得其加工耐热性增强，而且改性后淀粉附着性升高，所以当其与聚乙烯醇交联制得复合膜的整体性升高。
在本说明书的描述中，参考术语“一个实施例”、“示例”、“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上内容仅仅是对本发明所作的举例和说明，所属本技术领域的技术人员对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，只要不偏离发明或者超越本权利要求书所定义的范围，均应属于本发明的保护范围。

Claims (2)

1.一种高强度复合型瓦楞纸板，其特征在于，从上往下依次为改性淀粉基膜、面纸、硬质瓦楞纸层和内纸；所述改性淀粉基膜通过环保胶粘剂粘附在面纸表面；
所述改性淀粉基膜由如下方法制成：
（1）将淀粉、碳酸钠和硝酸钠按照100∶2-3∶1-1.5的重量比加入烧杯中混合，加入去离子水，控制淀粉和去离子水的重量比为1∶8-10，磁力搅拌15-30min后转移至微波炉中，控制微波炉的功率为500W，每加热2min，冷却5min，循环3次，之后调节pH，直至pH=7，抽滤、洗涤、干燥，制得改性淀粉；
（2）将聚乙烯醇加入去离子水中，加热至85-90℃并磁力搅拌，加入步骤（1）制备的改性淀粉，以240r/min的转速搅拌30min，之后依次加入丙三醇和单硬脂酸甘油酯，继续搅拌，直至形成均一的成膜液，之后倒在玻璃模具中，在45-50℃下干燥20-24h，揭膜，制得改性淀粉基膜，控制聚乙烯醇、去离子水、改性淀粉、丙三醇和单硬脂酸甘油酯的重量比为1∶10∶1∶0.5∶0.3；
所述环保胶粘剂由如下重量份原料制成：150-180份SBS树脂，20-45份甲苯，15-30份十二硫醇，250-300份乙酸乙酯，300-350份汽油，0.5-3份引发剂，3.5-5.0份马来酸酐，2-3份对苯二酚，1-3份松香；
所述环保胶粘剂由如下方法制成：
（1）将SBS粉碎加入三口烧瓶中，通入氮气，升温至75℃进行预热，之后将甲苯、十二硫醇、乙酸乙酯和汽油混合加入烧杯中，40-45℃水浴加热并磁力搅拌，之后加入引发剂，升温至55-60℃，并以120-140r/min的转速搅拌20-30min，之后升温至75-80℃，在此温度下反应1h，制得混合物A;
(2）将混合物A通过蠕动泵滴加至三口烧瓶中，控制滴加时间为2h，滴加结束后加入马来酸酐并在75℃下保温5-6h，磁力搅拌直至粘度为4000-5000cp，之后加入对苯二酚，5-10min后加入松香，继续保温30min，降温出料，制得环保胶粘剂；
所述引发剂为过氧化苯甲酰、异丙苯过氧化氢和过氧化环己酮中的一种或两种；
所述硬质瓦楞纸层由如下方法制成：将瓦楞纸浸泡在固体石蜡、二氧化硅和液体石蜡按照5∶2∶1的重量比混合而成的硬化液中，浸泡30min后取出烘干，制得硬质瓦楞纸层。
2.根据权利要求1所述的一种高强度复合型瓦楞纸板的生产工艺，其特征在于，包括如下步骤：
第一步、将改性淀粉基膜通过环保胶粘剂粘附在面纸表面，控制环保胶粘剂在面纸表面的涂布量为5-8g/m2，之后将面纸和内纸分别粘接在硬质瓦楞纸层上下表面，制得复合瓦楞纸半成品；
第二步、将复合瓦楞纸半成品放入烘缸中，控制温度为115-120℃，水份为3-5%，静置24小时制得所述高强度复合型瓦楞纸板。
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