CN111519476B - 一种全降解防酒精纸浆模塑产品及其制备方法 - Google Patents
一种全降解防酒精纸浆模塑产品及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种新的全降解防酒精的纸浆模塑产品的成形方法,将纸浆原料疏解获得均匀的浆料后加入防水剂、湿强剂和干强剂等化学药品,制得混合浆料,然后运送至成型机,经真空抽滤脱水制得纸浆模塑产品湿胚,最后将制得的改性纳米纤维素喷涂在纸浆模塑湿胚上,进行脱水处理、热压定型、切边制成模塑制品。本发明可采用竹子和普通农作物废料为浆料原料,制备得到的产品为绿色环保全降解材料,做到从源头到成品均无环境压力。产品使用废弃后可直接丢弃并自然降解成种植用土壤;或经破碎还原成种植用土壤进行复用或丢弃。采用无氟食品级抗酒精剂,获得更好的抗酒精防渗透效果,并可有效保护使用者健康安全。
Description
技术领域
本发明属于纸浆模塑生产技术领域,尤其涉及一种环保型纸浆模塑生产技术领域。
背景技术
纸浆模塑是一种立体造纸技术。它以废纸、木浆或其它植物纤维为原料,在模塑机上采用特殊形状的模具塑造出具有一定结构特点的纸浆制品。它具有四大优势:1.原料为废纸、木浆或其它植物纤维,包括板纸、废纸箱纸、废白边纸、针叶木浆、阔叶木浆、竹浆、蔗渣浆等,来源广泛;2.其制作过程由制浆、吸附成型、干燥定型等工序完成,流程较短,能耗较低,对环境无污染;3.产品具有良好的自然降解性能,可以回收再生利用;4.体积比发泡塑料小,质量轻,可重叠,交通运输方便,运输成本低。目前纸浆模塑产品除用作餐盒、餐具外,也可用做工业缓冲包装,发展十分迅速。
但是常见的纸浆模塑产品,如普通包装盒或杯子等,抗酒精能力较弱,因此不能应用于含酒精类液体的盛装。为了赋予纸浆模塑产品防酒精功能,以满足各种生产生活和医疗需要,常见的是使用氟化氨基甲酸乙酯衍生物氟防酒精试剂,但它们在环境中很难被降解,同时具有生物累积性和多种毒性,是典型的持久性有机污染物,环境友好性差。
发明内容
针对现有技术存在的上述问题,本发明提供了一种新的全降解无氟防酒精的纸浆模塑产品的成形方法。
本发明是这样实现的,一种新的全降解防酒精的纸浆模塑产品的成形方法,包括以下步骤:
步骤1,将纸浆原料进行解包、除杂、称量,用水力碎浆机进行碎解获得浆料;
步骤2,将处理好的浆料用双功能疏解机进行疏解,经过疏解机的切断、分丝、细纤维化,获得均匀的浆料;
步骤3,将浆料与白水混合,加入防水剂、湿强剂和干强剂等化学药品,搅拌均匀,制得混合浆料;
步骤4,将混合浆料经管道运送至模塑成型机,经真空抽滤脱水制得纸浆模塑产品湿胚;
步骤5:将改性纳米纤维素溶液喷涂在纸浆模塑湿胚上,改性纳米纤维素绝干质量:纸浆绝干纤维质量=0.2~1.0:100;
步骤6,将纸浆模塑产品湿坯进行脱水处理、热压定型、切边制成模塑制品。
进一步,步骤1中,所述的原料由漂白竹浆和甘蔗浆混合浆料组成,其中竹浆重量占比15%~30%,甘蔗浆重量占比70%~85%。
进一步,所述的防水剂为不含氟树脂,湿强剂是聚酰胺聚环氧氯丙烷树脂,干强剂是淀粉及其改性物。
进一步,步骤5的改性纳米纤维素采用本专利制备方法得到:
将纳米纤维素与1wt%的聚二甲基硅氧烷(采用四氢呋喃溶解)均匀混合,110~120℃温度下干燥20~30分钟;将氨乙基氨丙基三甲氧基硅烷在1%体积浓度的甲醇溶液中预水解,加入前述过程处理后的纳米纤维素,搅拌0.5~1.0小时,90~100℃下加热0.5~1.0小时,然后采用甲醇溶液洗涤2~3次,最后喷涂在纸浆模塑湿胚上。改性纳米纤维素溶液浓度为0.1%~0.5%,改性纳米纤维素绝干质量:纸浆绝干纤维质量=0.2~1.0:100;
进一步,步骤6中,所述的纸浆模塑产品湿坯脱水处理,具体操作参数:真空度-0.03MPa~-0.035MPa,抽吸负压下脱水15~20s,至含水率为65~75%。所述的热压定型条件是:压强在40~70kg/cm2、温度为170~230℃、时间为20~40s。
进一步,步骤3中,所述的防水剂、干强剂和湿强剂用量化学药品对绝干浆的用量比为:0.5%~1.5%,1.0%~2.0%,0.2%~1.2%。防水剂、干强剂和湿强剂采用本领域常用的市售食品级产品即可。
本发明的另一目的提供了利用所述环保型纸浆模塑产品成形方法制备的纸浆制品。
本发明的有益效果:
本发明采用竹子和普通农作物废料为浆料原料,产品为绿色环保全降解材料,实现从源头到成品均无环境压力。产品使用完毕废弃后可直接自然降解成种植用土壤;或经破碎还原成种植用土壤进行复用或丢弃。采用无氟食品级改性纳米纤维素抗酒精剂,获得更好的抗酒精防渗透效果,并可有效保护使用者健康安全。
具体实施方式
下面结合实例对本发明的具体实施方法作详细举例说明。下述实施例中没有特别说明的技术参数和助剂,本领域技术人员可以根据本技术领域的知识进行常规和适应性选择。
实施例1:改性纳米纤维素的制备
将纳米纤维素与1wt%的聚二甲基硅氧烷(采用四氢呋喃溶解)均匀混合,110~120℃温度下干燥30分钟。将氨乙基氨丙基三甲氧基硅烷在1%体积浓度的甲醇溶液中预水解,加入前述过程处理后的纳米纤维素,搅拌1.0小时,90~100℃下加热0.5小时,然后采用甲醇溶液洗涤3次;纳米纤维素:聚二甲基硅氧烷:氨乙基氨丙基三甲氧基硅烷=30:30:40(均为重量比)。
实施例2:改性纳米纤维素的制备
将纳米纤维素与1wt%的聚二甲基硅氧烷(采用四氢呋喃溶解)均匀混合,110~120℃温度下干燥25分钟。将氨乙基氨丙基三甲氧基硅烷在1%体积浓度的甲醇溶液中预水解,加入前述过程处理后的纳米纤维素,搅拌0.5小时,90~100℃下加热1.0小时,然后采用甲醇溶液洗涤3次;纳米纤维素:聚二甲基硅氧烷:氨乙基氨丙基三甲氧基硅烷=40:30:30(均为重量比)。
实施例3:改性纳米纤维素的制备
将纳米纤维素与1wt%的聚二甲基硅氧烷(采用四氢呋喃溶解)均匀混合,110~120℃温度下干燥25分钟。将氨乙基氨丙基三甲氧基硅烷在1%体积浓度的甲醇溶液中预水解,加入前述过程处理后的纳米纤维素,搅拌0.5小时,90~100℃下加热1.0小时,然后采用甲醇溶液洗涤3次;纳米纤维素:聚二甲基硅氧烷:氨乙基氨丙基三甲氧基硅烷=25:25:50(均为重量比)。
本发明实例提供的环保型防酒精纸浆模塑成形方法包括以下步骤:
步骤1:将原料漂白竹浆和甘蔗浆进行解包、除杂,按比例竹浆重量占比15%~30%,甘蔗浆重量占比70%~85%称量,用水力碎浆机进行碎解获得粉碎料;
步骤2:将处理好的粉碎料用双功能疏解机进行疏解,经过疏解机的切断、分丝、细纤维化,获得均匀的浆料;
步骤3:将浆料与白水混合,加入防水剂、湿强剂和干强剂等化学药品,搅拌均匀,制得混合浆料;所述的防水剂、干强剂和湿强剂根据配浆量的多少按绝干浆比例来确认添加量,分别为0.5~1.5W%,1.0~2.0W%,0.2~1.2W%。采用的防水剂均为不含氟树脂,湿强剂是聚酰胺聚环氧氯丙烷树脂,干强剂是淀粉及其改性物。
步骤4:将混合浆料经管道运送至模塑成型机,经真空抽滤脱水制得纸浆模塑杯子湿胚。
步骤5,将制备得到的改性纳米纤维素溶液喷涂在纸浆模塑湿胚内壁和/或外壁上,以重量计的喷涂量:纸浆绝干纤维重量=0.5~1.0:2.0。
步骤6:将纸浆模塑制品湿坯进行脱水处理、热压定型、切边制成模塑制品。热压定型,压强在40~70kg/cm2、温度为170~230℃、时间为20~40s。纸浆模塑制品湿坯脱水处理条件:其真空度-0.03MPa~-0.035MPa抽吸负压下脱水15~20s,含水率为65~75%。
下面具体实施例4~6采用以上的生产方法,可热压定型成一次性环保杯子、包装盒等。
实施例4:采用杯子模塑成型机制备防酒精杯子
本实施例提供的原料按照质量份数由30%漂白竹浆和70%漂白甘蔗浆组成。
本实施例中,防水剂、干强剂和湿强剂按绝干浆质量比例添加量为:0.6W%、1.7W%和0.3W%。
本实施例采用的防水剂为不含氟树脂(nano-tex,NT-X018),湿强剂是聚酰胺聚环氧氯丙烷树脂(青州市鑫帝化工有限公司,SQ-2),干强剂是淀粉及其改性物(无锡巨旺塑化材料有限公司,YZ-151)。
本实施例采用实施例1的改性纳米纤维素,改性纳米纤维素溶液浓度为0.1%。改性纳米纤维素绝干重量:纸浆绝干纤维重量=0.2:100,产品拒酒精级别为7级。
实施例5:采用杯子模塑成型机制备防酒精杯子
本实施例提供的原料按照质量份数由25%的漂白竹浆和75%的甘蔗浆组成。
本实施例中,防水剂、湿强剂和干强剂按绝干浆质量比例添加量为:0.9W%、0.7W%和0.5W%。
本实施例采用的防水剂为不含氟树脂(美国3M,PM-3705),湿强剂是聚酰胺聚环氧氯丙烷树脂(淄博万科化工有限公司,PAE-01),干强剂是淀粉及其改性物(普洱永吉生物技术有限责任公司昆明分公司,yh-089)。
本实施例采用实施例2制备的改性纳米纤维素,改性纳米纤维素溶液浓度为0.2%。改性纳米纤维素绝干量:纸浆绝干纤维重量=0.5:100,产品拒酒精级别为9级。
实施例6:采用杯子模塑成型机制备防酒精杯子
本实施例提供的原料按照质量份数由15%的漂白竹浆和85%的漂白甘蔗浆组成。
本实施例中,防水剂、湿强剂和干强剂按绝干浆质量比例添加量为:1.2W%、0.5W%和0.5W%。
本实施例采用的防水剂为不含氟树脂(Schoeller Technologies,ecorepel),湿强剂是聚酰胺聚环氧氯丙烷树脂(英德市云超聚合材料有限公司,PAE),干强剂是淀粉及其改性物(大城县亦博化工有限公司,α-化淀粉)。
本实施例采用实施例3制备的改性纳米纤维素,改性纳米纤维素溶液浓度为0.5%,改性纳米纤维素绝干量:纸浆绝干纤维重量=0.9:100,产品拒酒精级别为10级。
注:拒酒精级别的测试方法参考GB/T 24120-2009纺织品抗乙醇水溶液性能的测定:建立由乙醇与水按不同比例混合的标准测试液体系,共分10级,1~10级的拒酒精测试标准液体的水/乙醇比分别为9:1、8:2、7:3、6:4、5:5、4:6、3:7、2:8、1:9、0:10。测试时,先吸取低浓度测试液,滴在样品上,如果10s内没有润湿,则继续吸取高一级浓度测试液,直到润湿为止,最后取未能使样品润湿的最高级浓度为拒酒精级别。
以上实施例得到的纸浆模塑杯子产品为绿色环保全降解材料,其废弃后可直接丢弃并自然降解成种植用土壤;或经破碎还原成种植用土壤进行复用或丢弃。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (8)
1.一种全降解防酒精纸浆模塑产品的制备方法,包括以下步骤:
步骤1:将纸浆原料计量,用水力碎浆机进行碎浆获得浆料;
步骤2:将处理好的浆料采用双功能疏解机进行疏解,经过疏解机的切断、分丝、细纤维化,获得质量均匀的浆料;
步骤3:将质量均匀的浆料与白水混合,加入防水剂、湿强剂和干强剂助剂,搅拌均匀后制得混合浆料;
步骤4:将混合浆料经管道运送至模塑成型机,经真空抽滤脱水制得纸浆模塑产品湿胚;
步骤5:将改性纳米纤维素溶液喷涂在纸浆模塑湿胚上,所述的改性纳米纤维素溶液浓度为0.1%~0.5%,改性纳米纤维素绝干重量:纸浆绝干纤维重量=0.2~1.0:100;
步骤6:将喷涂后的纸浆模塑湿胚进行脱水、热压定型、转移切边制成最终模塑产品;
步骤5所述的改性纳米纤维素溶液采用如下方法得到:将纳米纤维素与1 wt%的聚二甲基硅氧烷均匀混合,110~120℃温度下干燥20~30分钟;将氨乙基氨丙基三甲氧基硅烷在1%体积浓度的甲醇溶液中预水解,加入干燥后的纳米纤维素,搅拌0.5~1.0小时,90~100℃下加热0.5~1.0小时。
2.如权利要求1所述的全降解防酒精纸浆模塑产品的制备方法,其特征在于:步骤1中,所述的纸浆原料为漂白竹浆和甘蔗浆的混合浆料,其中竹浆重量占比15%~30%,甘蔗浆重量占比85%~70%。
3.如权利要求1所述的全降解防酒精纸浆模塑产品的制备方法,其特征在于:所述的步骤3中,配浆系统为DCS系统结合现场开关按钮控制,当系统启动时,浆料与白水混合,按照DCS配浆参数设定浆料浓度0.28%~0.31%。
4.如权利要求1所述的全降解防酒精纸浆模塑产品的制备方法,其特征在于:步骤6纸浆模塑湿坯脱水处理,具体操作参数:真空度-0.03MPa~-0.035MPa抽吸负压下脱水15~20s,至含水率为65~75%。
5.如权利要求1所述的全降解防酒精纸浆模塑产品的制备方法,其特征在于:所述的步骤5中采用的改性纳米纤维素直径为10~20nm,长度为50~100nm。
6.如权利要求1所述的全降解防酒精纸浆模塑产品的制备方法,其特征在于:所述的热压定型条件是:压强在40~70kg/cm2、温度为170~230℃、时间为20~40s。
7.如权利要求1所述的全降解防酒精纸浆模塑产品的制备方法,其特征在于:步骤3所述的防水剂、干强剂和湿强剂用量占绝干浆的重量百分比分别为:0.5%~1.5%,1.0%~2.0%,0.2%~1.2%。
8.采用权利要求1-7任一项所述的全降解防酒精纸浆模塑产品的制备方法得到的纸浆模塑产品。
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