CN108867196A - 一种环保型防水纸及其制备方法 - Google Patents
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Abstract
本发明提供一种环保型防水纸及其制备方法,由以下成分制备而成:秸秆、枯树叶、竹子、改性丙烯酸树脂、氧化镁颗粒、果胶、聚酯纤维、淀粉、稀硫酸、甘油、木质纤维素、表面活性剂、助剂和聚乙烯醇。本发明制备的防水纸环保防水,具有良好的可书写性和可印刷性,能有效防止水分对纸张的伤害,在保证纸张疏水性的同时,不影响纸张的书写、印刷难度和效果,另外纸张中加入的多种植物成分能够使纸张快速的被生物降解,更加的环保安全,达到真正意义上的绿色环保。
Description
技术领域
本发明属于纸制品技术领域,具体涉及一种环保型防水纸及其制备方法。
背景技术
纸包装行业是包装业中发展最为迅速的领域之一,有着较大的发展空间,被认定为最有前途的绿色包装材料之一。而纸张的主要化学成分是纤维素和半纤维素,属于大分子多糖,其分子结构亲水性强,比较容易从周围的环境中吸收水分,从而导致纸板的强度下降。已有许多研究表明,纸制包装材料在吸水受潮后其强度会降到原来的10-20%。因此纸制包装材料在运输、储存过程中,防水性能非常重要。
材料表面的自由能决定了这种材料是亲水还是疏水,自由能越低,疏水性越强;表面微观的粗糙度则决定了亲疏水的强度,表面粗糙,疏水性越强。按照热力学的规律,表面能高的物质无法在表面能低的表面铺展开。水是表面能比较高的物质,因此水在表面能比水低的物质表面无法铺开渗入,因此改善纸质包装材料防水性能的手段主要有表面涂布和复合防水层两种,都是运用了这样的原理。
复合防水层是在原先纯纸浆的纸质材料上,复合上防水的材料,使得达到具有防水性的效果。一种是在普通纸质材料表面贴合防水材料,如塑料树脂薄膜等防水的片状结构;一种是在纸浆中加入防水材料,从而使得制成的材料具有防水性能。单独增贴防水材料的方法,表面防水性能良好,但是一旦水从接缝处渗入纸质包装,就会造成包装的软化变形,失去了防水的功能。而且增加复合层一般成本比表面涂布处理高,而且对于纸质包装材料后续的回收也会增加工序。而采用防水混合纸浆制造来获取防水性能往往为了权衡包装要求,防水性能较差,在长期高湿度情况下,防水性能难以保障。
表面涂布只需要在普通纸质包装材料表面通过涂布设备增加一层防水的表层,因此工艺简单,而且防水表层可以在印刷等工艺结束后进行,对于包装的其中通过表面涂布来增加包装材料的防水性能,是厂家普遍使用的方法。常见的手段包括施胶、光油涂布等。施胶多用松香胶,纸张获得的防水性能有限,施胶剂的疏水性不强,涂布不均匀厚度不一会造成防水性能的不稳定;通过光油涂布也只能部分提高防水性能,很难满足日益提高的防水要求。
公开号为CN106592332A,公开了一种含氟防水纸质包装材料的制备方法,以含氟丙烯酸酯单体、丙烯酸酯混合单体和环氧功能单体为原料,制备氟改性丙烯酸酯树脂;加入疏水性二氧化硅微粒对所述氟改性丙烯酸酯树脂进行改性,制备防水剂;将所述防水剂涂布在纸质包装材料表面。该方法制备的防水纸的疏水性高,但是其原材料不易获取、成本较高,并且原材料均具有一定的化学污染性,不环保,制备的纸张不易降解。
公开号为CN105603810A,公开了一种阻燃防水纸板的水性涂料及制备方法,水性涂料成分包括水性树脂、水性消泡剂、水性流平剂、水性增稠剂、水性异氰酸酯交联剂、改性氯化石蜡、改性二氧化硅、磷酸氢钠、磷酸二氢钠、无卤阻燃剂。按各物质相应的比例,将水性树脂与水性消泡剂、无卤阻燃剂、磷酸氢钠、磷酸二氢钠、改性氯化石蜡、改性二氧化硅、水性流平剂混合在一起后进行搅拌,再填加水性增稠剂,然后再填加水性异氰酸酯交联剂搅拌10-20分钟,得到阻燃防水纸板的水性涂料。该方法主要为制备的水性涂料涂覆于纸张上,以达到防水效果,该方式复杂、繁琐,并且防水效果有限,当纸张废弃是,其降解性能差,防水的涂料还具有一定的环境污染性。
综上所述,需要一种更好的防水纸,来改善现有技术的不足。
发明内容
本发明的目的是提供一种环保型防水纸及其制备方法,本发明制备的防水纸环保防水,具有良好的可书写性和可印刷性,能有效防止水分对纸张的伤害,在保证纸张疏水性的同时,不影响纸张的书写、印刷难度和效果,另外纸张中加入的多种植物成分能够使纸张快速的被生物降解,更加的环保安全,达到真正意义上的绿色环保。
本发明提供了如下的技术方案:
一种环保型防水纸,包括以下重量份的原料:秸秆30-45份、枯树叶42-55份、竹子24-32份、改性丙烯酸树脂18-24份、氧化镁颗粒11-17份、果胶17-22份、聚酯纤维23-28份、淀粉18-25份、稀硫酸7-11份、甘油14-19份、木质纤维素25-36份、表面活性剂12-16份、助剂12-15份和聚乙烯醇10-14份。
优选的,所述防水纸包括以下重量份的原料:秸秆30-43份、枯树叶46-55份、竹子24-30份、改性丙烯酸树脂20-24份、氧化镁颗粒11-16份、果胶18-22份、聚酯纤维23-27份、淀粉19-25份、稀硫酸7-10份、甘油16-19份、木质纤维素25-34份、表面活性剂13-16份、助剂12-14份和聚乙烯醇10-13份。
优选的,所述防水纸包括以下重量份的原料:秸秆41份、枯树叶50份、竹子30份、改性丙烯酸树脂22份、氧化镁颗粒15份、果胶22份、聚酯纤维25份、淀粉23份、稀硫酸10份、甘油16份、木质纤维素33份、表面活性剂14份、助剂12份和聚乙烯醇12份。
一种环保型防水纸的制备方法,包括以下制备步骤:
a、将秸秆、枯树叶、竹子和助剂混合,导入搅拌机中,在300-400r/min的转速下进行打浆处理,制成浓度在60-75%的浆料;
b、将淀粉与稀硫酸混合进行糊化处理,糊化温度为40-45℃,糊化时间为35-40min,得到淀粉溶液;
c、将改性丙烯酸树脂导入反应釜中,在120-145℃下加热,直至完全熔化,再加入氧化镁颗粒、聚酯纤维,降温至75-80℃,以200-250r/min的转速搅拌分散30-40min,保温得到混合物一;
d、向混合物一中加入聚乙烯醇,搅拌反应20-25min,再加入果胶、甘油和木质纤维素,在80-85℃下蒸煮10-15min,混合均匀后,得到混合物二;
e、将混合物二、浆料、淀粉溶液和表面活性剂一同导入混料机中,再次进行搅拌、打浆处理,浆液浓度在55-60%,再导入造纸机中脱水、压制成型,经干燥、压光热压,即可得到成品。
优选的,所述步骤a的助剂为丙二醇丁醚、丙二醇甲醚醋酸酯和去离子水混合在55℃下加热、搅拌反应25min所得。
优选的,所述步骤a的浆料浓度为72%。
优选的,所述步骤b的糊化温度为45℃,糊化时间为35min。
优选的,所述步骤c的改性丙烯酸树脂的制备方法为:将丙烯酸树脂、环氧树脂、乙酸丁酯和偶氮二异丁腈混合导入反应釜中,在85-90℃下保温反应1-2h,然后加入乙二胺进行开环反应,再加入有机酸搅拌,调节pH为5-6,降温后,即可得到改性丙烯酸树脂。
优选的,所述有机酸为乙酸、乳酸和氨基磺酸按质量比1:2:1混合而成。
优选的,所述步骤e的表面活性剂为十二烷基苯磺酸盐和硬脂酸按质量比3:2混合而成。
本发明的有益效果是:
本发明制备的防水纸环保防水,具有良好的可书写性和可印刷性,能有效防止水分对纸张的伤害,在保证纸张疏水性的同时,不影响纸张的书写、印刷难度和效果,另外纸张中加入的多种植物成分能够使纸张快速的被生物降解,更加的环保安全,达到真正意义上的绿色环保。
本发明中步骤a的助剂,采用的丙二醇丁醚、丙二醇甲醚醋酸酯和去离子水,形成的产物具有一定的成膜性能,使得步骤a的的浆料具有很好的分散性和粘稠度,从而提高制成的纸张具有良好的抗张强度。
本发明中步骤a的浆料浓度采用72%的优选,该浓度下,制成的纸张的韧性更好。
本发明中步骤b的糊化温度为45℃,糊化时间为35min的优选,有利于使得糊化后的淀粉的粘性最佳,从而使得制成的纸张韧性更好,并且在该粘性下,其他成分与之复配的相容性更好,易分散均匀。
本发明步骤c的改性丙烯酸树,将丙烯酸酯树脂与环氧树脂结合,可以弥补了环氧树脂和丙烯酸酯树脂的各自不足,提高疏水性和耐候性能,而加入的有机酸,可将混合树脂改性,增强其水溶性能,使其在混合浆料中分散均匀,从而提高制成的纸张的光亮度,使纸张色泽均匀。
本发明中的有机酸采用乙酸、乳酸和氨基磺酸的复配,以乳酸为主要原料,减少其它成分的用量,有利于提高降解性能和环保性能,降低纸张废弃后对环境的污染性。
本发明中的表面活性剂采用十二烷基苯磺酸盐和硬脂酸的复配,可以更好的将本发明中的疏水、疏油基团定向排列,从而提高成品的疏水、疏油性能。
具体实施方式
实施例1
一种环保型防水纸,包括以下重量份的原料:秸秆45份、枯树叶42份、竹子24份、改性丙烯酸树脂18份、氧化镁颗粒11份、果胶22份、聚酯纤维28份、淀粉25份、稀硫酸7份、甘油19份、木质纤维素25份、表面活性剂16份、助剂15份和聚乙烯醇10份。
一种环保型防水纸的制备方法,包括以下制备步骤:
a、将秸秆、枯树叶、竹子和助剂混合,导入搅拌机中,在400r/min的转速下进行打浆处理,制成浓度在60%的浆料;
b、将淀粉与稀硫酸混合进行糊化处理,糊化温度为45℃,糊化时间为35min,得到淀粉溶液;
c、将改性丙烯酸树脂导入反应釜中,在120℃下加热,直至完全熔化,再加入氧化镁颗粒、聚酯纤维,降温至75℃,以250r/min的转速搅拌分散40min,保温得到混合物一;
d、向混合物一中加入聚乙烯醇,搅拌反应20min,再加入果胶、甘油和木质纤维素,在85℃下蒸煮10min,混合均匀后,得到混合物二;
e、将混合物二、浆料、淀粉溶液和表面活性剂一同导入混料机中,再次进行搅拌、打浆处理,浆液浓度在60%,再导入造纸机中脱水、压制成型,经干燥、压光热压,即可得到成品。
步骤a的助剂为丙二醇丁醚、丙二醇甲醚醋酸酯和去离子水混合在55℃下加热、搅拌反应25min所得。
步骤c的改性丙烯酸树脂的制备方法为:将丙烯酸树脂、环氧树脂、乙酸丁酯和偶氮二异丁腈混合导入反应釜中,在85℃下保温反应2h,然后加入乙二胺进行开环反应,再加入有机酸搅拌,调节pH为6,降温后,即可得到改性丙烯酸树脂。
有机酸为乙酸、乳酸和氨基磺酸按质量比1:2:1混合而成。
步骤e的表面活性剂为十二烷基苯磺酸盐和硬脂酸按质量比3:2混合而成。
实施例2
一种环保型防水纸,包括以下重量份的原料:秸秆30份、枯树叶46份、竹子24份、改性丙烯酸树脂20份、氧化镁颗粒11份、果胶18份、聚酯纤维23份、淀粉19份、稀硫酸7份、甘油16份、木质纤维素25份、表面活性剂13份、助剂12份和聚乙烯醇10份。
一种环保型防水纸的制备方法,包括以下制备步骤:
a、将秸秆、枯树叶、竹子和助剂混合,导入搅拌机中,在300r/min的转速下进行打浆处理,制成浓度在60%的浆料;
b、将淀粉与稀硫酸混合进行糊化处理,糊化温度为40℃,糊化时间为35min,得到淀粉溶液;
c、将改性丙烯酸树脂导入反应釜中,在125℃下加热,直至完全熔化,再加入氧化镁颗粒、聚酯纤维,降温至75℃,以200r/min的转速搅拌分散30min,保温得到混合物一;
d、向混合物一中加入聚乙烯醇,搅拌反应20min,再加入果胶、甘油和木质纤维素,在80℃下蒸煮15min,混合均匀后,得到混合物二;
e、将混合物二、浆料、淀粉溶液和表面活性剂一同导入混料机中,再次进行搅拌、打浆处理,浆液浓度在55%,再导入造纸机中脱水、压制成型,经干燥、压光热压,即可得到成品。
步骤a的助剂为丙二醇丁醚、丙二醇甲醚醋酸酯和去离子水混合在55℃下加热、搅拌反应25min所得。
步骤c的改性丙烯酸树脂的制备方法为:将丙烯酸树脂、环氧树脂、乙酸丁酯和偶氮二异丁腈混合导入反应釜中,在85℃下保温反应1h,然后加入乙二胺进行开环反应,再加入有机酸搅拌,调节pH为5,降温后,即可得到改性丙烯酸树脂。
有机酸为乙酸、乳酸和氨基磺酸按质量比1:2:1混合而成。
步骤e的表面活性剂为十二烷基苯磺酸盐和硬脂酸按质量比3:2混合而成。
实施例3
一种环保型防水纸,包括以下重量份的原料:秸秆41份、枯树叶50份、竹子30份、改性丙烯酸树脂22份、氧化镁颗粒15份、果胶22份、聚酯纤维25份、淀粉23份、稀硫酸10份、甘油16份、木质纤维素33份、表面活性剂14份、助剂12份和聚乙烯醇12份。
一种环保型防水纸的制备方法,包括以下制备步骤:
a、将秸秆、枯树叶、竹子和助剂混合,导入搅拌机中,在400r/min的转速下进行打浆处理,制成浓度在72%的浆料;
b、将淀粉与稀硫酸混合进行糊化处理,糊化温度为45℃,糊化时间为35min,得到淀粉溶液;
c、将改性丙烯酸树脂导入反应釜中,在145℃下加热,直至完全熔化,再加入氧化镁颗粒、聚酯纤维,降温至80℃,以250r/min的转速搅拌分散40min,保温得到混合物一;
d、向混合物一中加入聚乙烯醇,搅拌反应25min,再加入果胶、甘油和木质纤维素,在85℃下蒸煮15min,混合均匀后,得到混合物二;
e、将混合物二、浆料、淀粉溶液和表面活性剂一同导入混料机中,再次进行搅拌、打浆处理,浆液浓度在60%,再导入造纸机中脱水、压制成型,经干燥、压光热压,即可得到成品。
步骤a的助剂为丙二醇丁醚、丙二醇甲醚醋酸酯和去离子水混合在55℃下加热、搅拌反应25min所得。
步骤c的改性丙烯酸树脂的制备方法为:将丙烯酸树脂、环氧树脂、乙酸丁酯和偶氮二异丁腈混合导入反应釜中,在90℃下保温反应2h,然后加入乙二胺进行开环反应,再加入有机酸搅拌,调节pH为6,降温后,即可得到改性丙烯酸树脂。
有机酸为乙酸、乳酸和氨基磺酸按质量比1:2:1混合而成。
步骤e的表面活性剂为十二烷基苯磺酸盐和硬脂酸按质量比3:2混合而成。
对比例1
与实施例1中的步骤a的浆料浓度不同,其余全部相同,浓度为75%。
对比例2
与实施例2中的步骤a的浆料浓度不同,其余全部相同,浓度为75%。
对比例3
与实施例3中的步骤a的浆料浓度不同,其余全部相同,浓度为65%。
检测以上实施例和对比例制备的成品,得到以下检测数据:
表一:
项目 | 抗张强度(MPa) | 断裂伸长率(%) | 降解时间(天) |
实施例1 | 15 | 112 | 75 |
实施例2 | 17 | 118 | 75 |
实施例3 | 20 | 125 | 64 |
对比例1 | 17 | 114 | 72 |
对比例2 | 18 | 120 | 72 |
对比例3 | 18 | 120 | 70 |
表二:
项目 | 制成100张纸的防水率(%) |
实施例1 | 98 |
实施例2 | 98 |
实施例3 | 100 |
对比例1 | 99 |
对比例2 | 99 |
对比例3 | 99 |
由表一、表二结果可得,本发明的最优选的方案,实施例3中,得到的数据显示,成品的韧性、防水率,均显著高于其它实施例和对比例,根据实施例和对比例显示,在步骤a的浆料浓度达到72%时,制备出的纸张的韧性和防水性能最佳。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种环保型防水纸,其特征在于,包括以下重量份的原料:秸秆30-45份、枯树叶42-55份、竹子24-32份、改性丙烯酸树脂18-24份、氧化镁颗粒11-17份、果胶17-22份、聚酯纤维23-28份、淀粉18-25份、稀硫酸7-11份、甘油14-19份、木质纤维素25-36份、表面活性剂12-16份、助剂12-15份和聚乙烯醇10-14份。
2.根据权利要求1所述的一种环保型防水纸,其特征在于,所述防水纸包括以下重量份的原料:秸秆30-43份、枯树叶46-55份、竹子24-30份、改性丙烯酸树脂20-24份、氧化镁颗粒11-16份、果胶18-22份、聚酯纤维23-27份、淀粉19-25份、稀硫酸7-10份、甘油16-19份、木质纤维素25-34份、表面活性剂13-16份、助剂12-14份和聚乙烯醇10-13份。
3.根据权利要求1所述的一种环保型防水纸,其特征在于,所述防水纸包括以下重量份的原料:秸秆41份、枯树叶50份、竹子30份、改性丙烯酸树脂22份、氧化镁颗粒15份、果胶22份、聚酯纤维25份、淀粉23份、稀硫酸10份、甘油16份、木质纤维素33份、表面活性剂14份、助剂12份和聚乙烯醇12份。
4.权利要求1-3任一项所述的一种环保型防水纸的制备方法,其特征在于,包括以下制备步骤:
a、将秸秆、枯树叶、竹子和助剂混合,导入搅拌机中,在300-400r/min的转速下进行打浆处理,制成浓度在60-75%的浆料;
b、将淀粉与稀硫酸混合进行糊化处理,糊化温度为40-45℃,糊化时间为35-40min,得到淀粉溶液;
c、将改性丙烯酸树脂导入反应釜中,在120-145℃下加热,直至完全熔化,再加入氧化镁颗粒、聚酯纤维,降温至75-80℃,以200-250r/min的转速搅拌分散30-40min,保温得到混合物一;
d、向混合物一中加入聚乙烯醇,搅拌反应20-25min,再加入果胶、甘油和木质纤维素,在80-85℃下蒸煮10-15min,混合均匀后,得到混合物二;
e、将混合物二、浆料、淀粉溶液和表面活性剂一同导入混料机中,再次进行搅拌、打浆处理,浆液浓度在55-60%,再导入造纸机中脱水、压制成型,经干燥、压光热压,即可得到成品。
5.根据权利要求4所述的一种环保型防水纸的制备方法,其特征在于,所述步骤a的助剂为丙二醇丁醚、丙二醇甲醚醋酸酯和去离子水混合在55℃下加热、搅拌反应25min所得。
6.根据权利要求4所述的一种环保型防水纸的制备方法,其特征在于,所述步骤a的浆料浓度为72%。
7.根据权利要求4所述的一种环保型防水纸的制备方法,其特征在于,所述步骤b的糊化温度为45℃,糊化时间为35min。
8.根据权利要求4所述的一种环保型防水纸的制备方法,其特征在于,所述步骤c的改性丙烯酸树脂的制备方法为:将丙烯酸树脂、环氧树脂、乙酸丁酯和偶氮二异丁腈混合导入反应釜中,在85-90℃下保温反应1-2h,然后加入乙二胺进行开环反应,再加入有机酸搅拌,调节pH为5-6,降温后,即可得到改性丙烯酸树脂。
9.根据权利要求8所述的一种环保型防水纸的制备方法,其特征在于,所述有机酸为乙酸、乳酸和氨基磺酸按质量比1:2:1混合而成。
10.根据权利要求4所述的一种环保型防水纸的制备方法,其特征在于,所述步骤e的表面活性剂为十二烷基苯磺酸盐和硬脂酸按质量比3:2混合而成。
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