CN111019556B - 一种含矿物漂白胶剂及其制备工艺 - Google Patents
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Abstract
本发明针对现有技术中，胶水以高岭土为填充剂，存在颜色深的问题，提供一种含矿物漂白胶剂及其制备工艺，包括以下步骤：（1）在室温下，将烧碱加入水中溶解，然后在不断搅拌的条件下加入胶原料，搅拌均匀后，加热至80‑95℃，搅拌15‑20min；（2）在保持80‑95℃的条件下，加入高岭土，并搅拌均匀，然后加入二氧化硫脲，继续搅拌10‑30min，即可得到含矿物漂白胶剂；本发明采用二氧化硫脲利用制胶水时的加热和烧碱，将高岭土中的三价铁还原成二价铁，实现高岭土的漂白。
Description
技术领域
本发明属于纸管胶、瓦楞纸胶水制备技术领域，具体涉及一种含矿物漂白胶剂及其制备工艺。
背景技术
二氧化硫脲是一种室温下稳定的化合物，需要在碱性60℃以上才能释放出次硫酸，起到还原、漂白的作用。在制作纸管胶、瓦楞纸胶水时需要使用矿物比如高岭土作为填充剂，但普通没有漂白过的高岭土颜色较深，影响使用后的效果，比如会造成白板纸的白度下降等。而二氧化硫脲在进行矿物漂白时需要进行加热，以将铁从高岭土中去除。中国发明专利CN201610603695公开了一种去除高岭土中铁的方法，包括以下步骤：①选用铁含量在0.8%以下的高岭土，制浆，浆液浓度为15-25%；②向步骤①制备的浆液中加入二氧化硫脲，并调节浆液pH值为7.5-8.0，不断搅拌，并在45-100℃下保持25-30min；③将步骤②处理得到的浆液用硫酸调节pH值为2.0-3.0，然后加入草酸，不断搅拌，并在45-100℃下保持25-30min；④将步骤③得到的浆液压滤即得漂白后的高岭土。该专利虽然能够漂白高岭土，但是需要加热搅拌、中和、压滤等工序，操作复杂，成本较高。
发明内容
本发明针对现有技术中，胶水以高岭土为填充剂，存在颜色深的问题，提供一种含矿物漂白胶剂及其制备工艺，二氧化硫脲利用制胶水时的加热和烧碱，将高岭土中的三价铁还原成二价铁，实现高岭土的漂白。
本发明采用如下技术方案：
一种含矿物漂白胶剂的制备工艺，包括以下步骤：
（1）在室温下，将烧碱加入水中溶解，然后在不断搅拌的条件下加入胶原料，搅拌均匀后，加热至80-95℃，搅拌15-20min；
其中，所述烧碱占水的质量比为2%-4%；
所述胶原料占水的质量比为10%-30%；
（2）在保持80-95℃的条件下，加入高岭土，并搅拌均匀，然后加入二氧化硫脲，继续搅拌10-30min，即可得到含矿物漂白胶剂；
其中，所述高岭土占水的质量比为3%-15%；
所述二氧化硫脲占水的质量比为0.2%-0.5%。
优选地，所述胶原料为淀粉和聚乙烯醇一种或两种的混和物。
优选地，所述胶原料占水的质量比为20%。
优选地，所述高岭土占水的质量比为7%。
优选地，所述所述二氧化硫脲占水的质量比为0.4%。
本发明的有益效果如下：
在制作胶水时，需要将淀粉、聚乙烯醇等与各种原料与烧碱混合加热一段时间，本发明在制作胶水的过程中，加入高岭土和二氧化硫脲，将漂白和熬制过程中合二为一，在制取胶水的同时漂白高岭土，降低生产成本。此外，本发明还可以对白度不高的淀粉或聚乙烯醇这些成胶原料进行漂白，此外因为有过量的二氧化硫脲及其分解还原性物质的存在，也可以防止已经制备完成的胶水在使用其粘合纸管、白板纸或瓦楞纸等过程中氧化返黄。
具体实施方式
为了使本发明的技术目的、技术方案和有益效果更加清楚，下面结合具体实施例对本发明的技术方案作出进一步的说明。
实施例1
一种含矿物漂白胶剂的制备工艺，包括以下步骤：
（1）在室温下，将10g烧碱加入500mL水中溶解，然后在不断搅拌的条件下加入50g淀粉，搅拌均匀后，加热至80℃，搅拌15min；
（2）在保持80℃的条件下，加入15g高岭土，并搅拌均匀，然后加入1g二氧化硫脲，继续搅拌10min，即可得到含矿物漂白胶剂。
实施例2
一种含矿物漂白胶剂的制备工艺，包括以下步骤：
（1）在室温下，将15g烧碱加入500mL水中溶解，然后在不断搅拌的条件下加入100g聚乙烯醇（根据所需粘度，选择不同分子量的聚乙烯醇，例如可选择平均分子量110000-130000），搅拌均匀后，加热至85℃，搅拌20min；
（2）在保持85℃的条件下，加入35g高岭土，并搅拌均匀，然后加入2g二氧化硫脲，继续搅拌20min，即可得到含矿物漂白胶剂。
实施例3
一种含矿物漂白胶剂的制备工艺，包括以下步骤：
（1）在室温下，将20g烧碱加入500mL水中溶解，然后在不断搅拌的条件下加入淀粉和聚乙烯醇的混和物，其中，淀粉用量为50g，聚乙烯醇用量为100g，搅拌均匀后，加热至95℃，搅拌20min；
（2）在保持95℃的条件下，加入75g高岭土，并搅拌均匀，然后加入2.5g二氧化硫脲，继续搅拌30min，即可得到含矿物漂白胶剂。
与使用没有漂白的高岭土的胶剂相比，本发明实施例1至3所得胶剂的蓝光白度由66提高到85~89，使用常规工艺漂白高岭土的胶剂的白度为82~84，且本发明实施例1至3的胶剂放置两天后，白度仍维持在83以上，而使用常规工艺漂白高岭土的胶剂，白度下降至79.
粘合后的白板纸，白板纸的初始白度都为为89，使用常规工艺漂白的高岭土的胶剂的白板纸白度两天后下降至85，使用该漂白工艺，白板纸白度只下降至88。
最后所应说明的是：上述实施例仅用于说明而非限制本发明的技术方案，任何对本发明进行的等同替换及不脱离本发明精神和范围的修改或局部替换，其均应涵盖在本发明权利要求保护的范围之内。
Claims (4)
1.一种含矿物漂白胶剂在防止制备完成的胶水粘合纸管、白板纸或瓦楞纸过程中氧化返黄的应用，其特征在于，所述矿物为高岭土；
所述含矿物漂白胶剂通过如下步骤制备得到：
（1）在室温下，将烧碱加入水中溶解，然后在不断搅拌的条件下加入胶原料，搅拌均匀后，加热至80-95℃，搅拌15-20min；
其中，所述烧碱占水的质量比为2%-4%；
所述胶原料占水的质量比为10%-30%；
（2）在保持80-95℃的条件下，加入高岭土，并搅拌均匀，然后加入二氧化硫脲，继续搅拌10-30min，即可得到含矿物漂白胶剂；
其中，所述高岭土占水的质量比为3%-15%；
所述二氧化硫脲占水的质量比为0.2%-0.5%；
所述胶原料为淀粉和聚乙烯醇中的一种或者两者的混和物。
2.根据权利要求1所述的应用，其特征在于，所述胶原料为淀粉；所述胶原料占水的质量比为10%；所述高岭土占水的质量比为3%；所述二氧化硫脲占水的质量比为0.2%。
3.根据权利要求1所述的应用，其特征在于，所述胶原料为平均分子量110000-130000的聚乙烯醇；所述胶原料占水的质量比为20%；所述高岭土占水的质量比为7%；所述二氧化硫脲占水的质量比为0.4%。
4.根据权利要求1所述的应用，其特征在于，所述胶原料为淀粉和聚乙烯醇的混和物；所述胶原料占水的质量比为30%；所述高岭土占水的质量比为15%；所述二氧化硫脲占水的质量比为0.5%。
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Effective date of registration: 20230918 Address after: 457400 East Road, 600m north of the intersection of national highway 106 and Minsheng Road, Nanle County, Puyang City, Henan Province Patentee after: Puyang Shengkai environmental protection new material technology Co.,Ltd. Address before: 457400 East Road, 600m north of the intersection of national highway 106 and Minsheng Road, Nanle County, Puyang City, Henan Province Patentee before: Puyang Shengkai environmental protection new material technology Co.,Ltd. Patentee before: Puyang lvjie New Material Technology Co.,Ltd. |
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