CN112941952A - 一种高强度环保型纸箱及其制备方法 - Google Patents
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Abstract
本发明公开了一种高强度环保型纸箱及其制备方法，经过打浆、抄造、热压成型最终得到高强度环保纸箱。本发明采用两种环保型纤维协同作用对纸基进行加固，增强了纸箱的机械强度，采用的聚乳酸/聚己内酯复合纤维具有生物降解性，聚乳酸和聚己内酯混合，使得聚乳酸脆性减小韧性增强，经过氧化镁改性的椰壳纤维共同作用，使得本发明的高强度环保型纸箱具有优秀的机械强度。
Description
技术领域
本发明属于纸箱加工技术领域，具体涉及一种高强度环保型纸箱及其制备方法。
背景技术
随着互联网经济的快速发展，越来越多的人选择网上购物作为购买物品的渠道，这些网络商品通过快递的方式寄送到消费者的手中，这些商品在寄送的过程中需要经过打包处理，商品打包处理过程常常会用到纸箱，一种高强度、抗耐磨的纸箱就能够很好的保护这些商品在运输的过程中不会因为各种因素而受到损坏。此外，这些纸箱在使用过后，在回收的过程中由于回收工艺的缘故，或多或少会对环境造成不必要的污染。
发明内容
为了应对上述背景中所提到的问题，本发明提供了一种高强度环保型纸箱。
一种高强度环保型纸箱的制备方法，具体步骤如下:
(1)将玉米秸秆、干稻草粉碎后放入水煎煮6h，过滤得到纸浆；
(2)使用打浆机对纸浆进行打浆，叩解度为40-50°SR；
(3)向纸浆中加入聚乳酸/聚己内酯复合纤维和改性椰壳纤维继续打浆2-4h；
(4)将混合纸浆注入抄纸机中进行抄造，抄造所得纸页进行烘干处理，烘干温度为70-80℃，烘干时间为4-6h；
(5)将烘干后的纸经热压工艺制得高强度环保型纸箱。
进一步的，纸浆、聚乳酸/聚己内酯复合纤维和改性椰壳纤维质量比为100:16-20:8-15。
进一步的，所述聚乳酸/聚己内酯复合纤维的制备方法为：将聚乳酸和聚己内酯在烘箱中烘干后按照质量比1:1放入共混仪中进行熔融共混5min，共混温度170-190℃。熔融共混结束后将所得聚乳酸/聚己内酯初生纤维在纤维拉伸机上拉伸，拉伸温度为60-95℃。
优选的，聚乳酸和聚己内酯熔融共混温度为185℃。
优选的，聚乳酸/聚己内酯复合纤维的热拉伸温度为85℃。
进一步的，改性椰壳纤维的制备方法为：将椰壳纤维分散于10％的NaOH溶液中超声30min，随后加热搅拌4-8h，用去离子水洗涤收集并在60℃烘箱中干燥8h。将干燥好的椰壳纤维分散在乙醇溶液中，加入硅烷偶联剂和纳米氧化镁恒温搅拌1-2h，保温1h后过滤干燥，制得改性椰壳纤维。
进一步的，椰壳纤维、硅烷偶联剂和纳米氧化镁的质量比为100:3-6:0.5-1。
优选的，所述硅烷偶联剂为KH550。
进一步的，恒温搅拌温度为50-80℃。
优选的，恒温搅拌温度为60℃。
本发明的有益效果为：
本发明的一种高强度环保型纸箱，其纸浆原料来源主要为玉米秸秆、干稻草，具有易获取、无污染的特点，纸浆在打浆过程中加入聚乳酸/聚己内酯复合纤维，聚乳酸纤维是一种以乳酸为原料聚合得到的聚合物纤维，具有良好的生物降解性，能在微生物的作用下代谢的最终产物为二氧化碳和水，对环境无污染。但是聚乳酸也具有脆性大韧性不足的缺点，采用聚己内酯与聚乳酸共混对聚己内酯进行加固获得聚乳酸/聚己内酯复合纤维，改善了聚乳酸纤维的力学性能，增强了所得纸箱的机械强度。
具体实施方式
下面结合实施例对本发明的具体实施方式作进一步描述，以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
实施例1：
一种高强度环保型纸箱的制备方法，具体步骤如下:
(1)将玉米秸秆、干稻草粉碎后放入水煎煮6h，过滤得到纸浆；
(2)使用打浆机对纸浆进行打浆，叩解度为45°SR；
(3)向纸浆中加入聚乳酸/聚己内酯复合纤维和改性椰壳纤维继续打浆4h；纸浆、聚乳酸/聚己内酯复合纤维和改性椰壳纤维质量比为100:18:8。
(4)将混合纸浆注入抄纸机中进行抄造，抄造所得纸页进行烘干处理，烘干温度为80℃，烘干时间为6h；
(5)将烘干后的纸经热压工艺制得高强度环保型纸箱。
聚乳酸/聚己内酯复合纤维的制备方法为：将聚乳酸和聚己内酯在烘箱中烘干后按照质量比1:1放入共混仪中进行熔融共混5min，共混温度185℃。熔融共混结束后将所得聚乳酸/聚己内酯初生纤维在纤维拉伸机上拉伸，拉伸温度为85℃。
改性椰壳纤维的制备方法为：将椰壳纤维分散于10％的NaOH溶液中超声30min，随后加热搅拌5h，搅拌温度为60℃，用去离子水洗涤收集并在60℃烘箱中干燥8h。将干燥好的椰壳纤维分散在乙醇溶液中，加入KH550硅烷偶联剂和纳米氧化镁恒温搅拌2h，保温1h后过滤干燥，制得改性椰壳纤维。
优选的椰壳纤维、硅烷偶联剂和纳米氧化镁的质量比为100:4:0.8。
实施例2：
一种高强度环保型纸箱的制备方法，具体步骤如下:
(1)将玉米秸秆、干稻草粉碎后放入水煎煮6h，过滤得到纸浆；
(2)使用打浆机对纸浆进行打浆，叩解度为50°SR；
(3)向纸浆中加入聚乳酸/聚己内酯复合纤维和改性椰壳纤维继续打浆4h；纸浆、聚乳酸/聚己内酯复合纤维和改性椰壳纤维质量比为100:20:14。
(4)将混合纸浆注入抄纸机中进行抄造，抄造所得纸页进行烘干处理，烘干温度为70℃，烘干时间为6h；
(5)将烘干后的纸经热压工艺制得高强度环保型纸箱。
聚乳酸/聚己内酯复合纤维的制备方法为：将聚乳酸和聚己内酯在烘箱中烘干后按照质量比1:1放入共混仪中进行熔融共混5min，共混温度170。熔融共混结束后将所得聚乳酸/聚己内酯初生纤维在纤维拉伸机上拉伸，拉伸温度为80℃)。
改性椰壳纤维的制备方法为：将椰壳纤维分散于10％的NaOH溶液中超声30min，随后加热搅拌7h，搅拌温度为70℃)，用去离子水洗涤收集并在60℃烘箱中干燥8h。将干燥好的椰壳纤维分散在乙醇溶液中，加入KH550硅烷偶联剂和纳米氧化镁恒温搅拌1.5h，保温1h后过滤干燥，制得改性椰壳纤维。
优选的椰壳纤维、硅烷偶联剂和纳米氧化镁的质量比为100:4:0.6。
实施例3：
一种高强度环保型纸箱的制备方法，具体步骤如下:
(1)将玉米秸秆、干稻草粉碎后放入水煎煮6h，过滤得到纸浆；
(2)使用打浆机对纸浆进行打浆，叩解度为40°SR；
(3)向纸浆中加入聚乳酸/聚己内酯复合纤维和改性椰壳纤维继续打浆3h；纸浆、聚乳酸/聚己内酯复合纤维和改性椰壳纤维质量比为100:20:13。
(4)将混合纸浆注入抄纸机中进行抄造，抄造所得纸页进行烘干处理，烘干温度为80℃，烘干时间为4h；
(5)将烘干后的纸经热压工艺制得高强度环保型纸箱。
聚乳酸/聚己内酯复合纤维的制备方法为：将聚乳酸和聚己内酯在烘箱中烘干后按照质量比1:1放入共混仪中进行熔融共混5min，共混温度175℃)。熔融共混结束后将所得聚乳酸/聚己内酯初生纤维在纤维拉伸机上拉伸，拉伸温度为70℃)。
改性椰壳纤维的制备方法为：将椰壳纤维分散于10％的NaOH溶液中超声30min，随后加热搅拌4-8h，搅拌温度为70℃)，用去离子水洗涤收集并在60℃烘箱中干燥8h。将干燥好的椰壳纤维分散在乙醇溶液中，加入KH550硅烷偶联剂和纳米氧化镁恒温搅拌1h，保温1h后过滤干燥，制得改性椰壳纤维。
优选的椰壳纤维、硅烷偶联剂和纳米氧化镁的质量比为100:3:0.6。
实施例4：
一种高强度环保型纸箱的制备方法，具体步骤如下:
(1)将玉米秸秆、干稻草粉碎后放入水煎煮6h，过滤得到纸浆；
(2)使用打浆机对纸浆进行打浆，叩解度为50°SR；
(3)向纸浆中加入聚乳酸/聚己内酯复合纤维和改性椰壳纤维继续打浆4h；纸浆、聚乳酸/聚己内酯复合纤维和改性椰壳纤维质量比为100:19:15。
(4)将混合纸浆注入抄纸机中进行抄造，抄造所得纸页进行烘干处理，烘干温度为80℃，烘干时间为6h；
(5)将烘干后的纸经热压工艺制得高强度环保型纸箱。
聚乳酸/聚己内酯复合纤维的制备方法为：将聚乳酸和聚己内酯在烘箱中烘干后按照质量比1:1放入共混仪中进行熔融共混5min，共混温度170℃)。熔融共混结束后将所得聚乳酸/聚己内酯初生纤维在纤维拉伸机上拉伸，拉伸温度为90℃)。
改性椰壳纤维的制备方法为：将椰壳纤维分散于10％的NaOH溶液中超声30min，随后加热搅拌6h，搅拌温度为75℃)，用去离子水洗涤收集并在60℃烘箱中干燥8h。将干燥好的椰壳纤维分散在乙醇溶液中，加入KH550硅烷偶联剂和纳米氧化镁恒温搅拌2h，保温1h后过滤干燥，制得改性椰壳纤维。
优选的椰壳纤维、硅烷偶联剂和纳米氧化镁的质量比为100:6:1。
对实施例1-4所得产品分别采用纸板平压仪、纸板边压仪和纸箱耐破仪进行平压强度、边压强度和纸箱耐破度测试。平压强度依据GB/T2679.6测试方法，边压强度依据GB/T6546测试方法，耐破度依据GB/T454-2002测试方法，测试结果见表1。实施例1-4所得产品平压强度>800N/m2，边压强度>3KN/m，耐破度>2kpa·m2/g，满足日常使用需求。
表1实施例1-4纸箱性能测试结果
Claims (6)
1.一种高强度环保型纸箱的制备方法，其特征在于，包括以下步骤：
(1)将玉米秸秆、干稻草粉碎后放入水煎煮6h，过滤得到纸浆；
(2)使用打浆机对纸浆进行打浆，叩解度为40-50°SR；
(3)向纸浆中加入聚乳酸/聚己内酯复合纤维和改性椰壳纤维继续打浆2-4h；
(4)将混合纸浆注入抄纸机中进行抄造，抄造所得纸页进行烘干处理，烘干温度为70-80℃，烘干时间为4-6h；
(5)将烘干后的纸经热压工艺制得高强度环保型纸箱。
2.根据权利要求1所述的一种高强度环保型纸箱的制备方法，其特征在于，步骤(3)中，纸浆、聚乳酸/聚己内酯复合纤维和改性椰壳纤维质量比为100:(16-20):(8-15)。
3.根据权利要求1所述的一种高强度环保型纸箱的制备方法，其特征在于，所述聚乳酸/聚己内酯复合纤维的制备方法为：将聚乳酸和聚己内酯在烘箱中烘干后按照质量比1:1放入共混仪中进行熔融共混5min，共混温度为170-190℃；熔融共混结束后将所得聚乳酸/聚己内酯初生纤维在纤维拉伸机上拉伸。
4.根据权利要求3所述的聚乳酸/聚己内酯复合纤维的制备方法，其特征在于，聚乳酸/聚己内酯复合纤维的热拉伸温度为60-95℃。
5.根据权利要求1所述的一种高强度环保型纸箱的制备方法，其特征在于，所述改性椰壳纤维的制备方法为：将椰壳纤维分散于10％的NaOH溶液中超声30min，随后加热搅拌4-8h，搅拌温度为50-80℃；用去离子水洗涤收集并在60℃烘箱中干燥8h；将干燥好的椰壳纤维分散在乙醇溶液中，加入KH550硅烷偶联剂和纳米氧化镁恒温搅拌1-2h，保温1h后过滤干燥，制得改性椰壳纤维。
6.根据权利要求1所述的改性椰壳纤维的制备方法，所述椰壳纤维、硅烷偶联剂和纳米氧化镁的质量比为100:(3-6):(0.5-1)。
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