CN113047082A - 一种无塑牛皮离型纸及其制备工艺 - Google Patents
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Abstract
本发明公开了一种无塑牛皮离型纸及其制备工艺,包括牛皮原纸,所述牛皮原纸正面涂覆有抗水层,且所述抗水层的上方涂覆有离型层,所述牛皮原纸定量60‑100 g/m2,纵向抗张强度4‑7KN/m,强度高,做成胶带使用时不易被拉断;吸水性15‑35g/m2,较低的吸水性,涂覆抗水剂时能更好的附着在牛皮原纸的正面,不会大量被吸收到牛皮原纸内部,节省成本,在所述牛皮原纸单面涂覆抗水剂,取代PE淋膜工艺或含浸工艺,所述抗水层克重2‑8g/m2,做到无塑化的同时节省成本,在所述抗水层上涂布离型液,所述离型层克重0.3‑3 g/m2,离型力100‑300Gf/2.5cm,离型量少,离型力低,节省成本,本发明的无塑牛皮离型纸,可以轻松的书写,不含塑料成分容易降解,节省成本。
Description
技术领域
本发明涉及造纸和纸加工领域,尤其涉及一种无塑牛皮离型纸及其制备工艺。
背景技术
牛皮纸是坚韧耐水的包装用纸,呈棕黄色,用途很广,常用于制作纸袋、信封、作业本、唱片套、卷宗和砂纸等。定量范围为80克/平方米至120克/平方米,有卷筒纸和平板纸中、又有单面光、双面光和带条纹的区别。主要的质量要求是柔韧结实,耐破度高,能承受较大拉力和压力不破裂。牛皮纸具有很高的拉力,有单光、双光、条纹、无纹等。主要用于包装纸、信封、纸袋等和印刷机滚筒包衬等。
而牛皮纸离型纸就是制作牛皮纸胶带的基材,现有牛皮纸胶带基材通过在原纸一面涂覆一层PE膜后再涂覆有机硅离型剂制成,由于PE属于塑料材质是不可降解的高分子材料,随着限塑令和禁塑令的推行,用PE淋膜的牛皮离型纸会逐渐被淘汰,同时通过含浸的方式来替代淋膜生产牛皮离型纸,含浸成本太高,市场也难以接受。目前市场上急需一款低成本的无塑牛皮离型纸。
发明内容
本发明要解决的技术问题,提供一种无塑牛皮离型纸及其制备工艺,从而解决上述问题。
为实现上述目的,本发明提供如下技术方案:一种无塑牛皮离型纸,包括牛皮原纸,所述牛皮原纸正面涂覆有抗水层,且所述抗水层的上方涂覆有离型层。
作为优选的,所述牛皮原纸定量60-100 g/m2,纵向抗张强度4-7KN/m,强度高,做成胶带使用时不易被拉断;吸水性15-35g/m2,较低的吸水性,涂覆抗水剂时能更好的附着在牛皮原纸的正面,不会大量被吸收到牛皮原纸内部,节省成本。
作为优选的,在所述牛皮原纸单面涂覆抗水剂,取代PE淋膜工艺或含浸工艺,所述抗水层克重2-8g/m2,做到无塑化的同时节省成本。
作为优选的,在所述抗水层上涂布离型液,所述离型层克重0.3-3 g/m2,离型力100-300Gf/2.5cm,离型量少,离型力低,节省成本。
一种无塑牛皮离型纸的制备工艺,包括以下步骤:
a、先对牛皮原纸进行单面涂覆抗水剂,所述牛皮原纸吸水性较低,大量抗水剂附着在牛皮原纸的表面,用刮刀涂布的方式将多余的抗水剂刮除,准确控制抗水层的克重;
b、涂覆抗水层后的牛皮纸先进入烘箱干燥,再进行烘缸干燥整饰,烘箱干燥温度60-100℃;出烘箱后纸张保持10-15%的水分,再进入上下组缸干燥,烘缸干燥温度120-140℃;整饰纸面使抗水层更平整,可减少离型液的用量,同时避免单面受热造成纸张卷边的问题;
c、烘缸干燥完成后在所述牛皮纸的抗水层上涂覆离型液,进入烘箱干燥 ,采用低风量高风温的方式干燥,使离型液快速固化,避免风量过大使离型液在纸面上分布不均;烘箱热风采用导热油加热温度达到180-200℃,风量在100-200m3/h,干燥时间10S-20S;
d、出烘箱后的牛皮离型纸,在纸张两面进行喷雾处理,收卷时纸张水分达到2-6%,避免纸张高温干燥后,纸页中水分含量过低,出现纸张易脆易断的问题。
作为优选的,所述抗水剂主要成分为机硅改性的丙烯酸树脂。保证纸张具有良好的防渗透性能,又不导致纸张表面出现滚水现象,可以与离型层很好的结合在一起。
作为优选的,所述离型液为丙烯酸酯类聚合物与醋酸乙烯类(含硅类)化合物混合而成;添加少量含硅类的离型剂可有效降低离型力,实现轻离型并节省成本。
与现有技术相比,本发明的有益效果如下:
本发明的无塑牛皮离型纸,可以轻松的书写,不含塑料成分容易降解,节省成本。
具体实施方式
下面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做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
一种无塑牛皮离型纸,包括牛皮原纸,牛皮原纸正面涂覆有抗水层,且抗水层的上方涂覆有离型层。
牛皮原纸定量60-100 g/m2,纵向抗张强度4-7KN/m,强度高,做成胶带使用时不易被拉断;吸水性15-35g/m2,较低的吸水性,涂覆抗水剂时能更好的附着在牛皮原纸的正面,不会大量被吸收到牛皮原纸内部,节省成本。
在牛皮原纸单面涂覆抗水剂,取代PE淋膜工艺或含浸工艺,抗水层克重2-8g/m2,做到无塑化的同时节省成本。
在抗水层上涂布离型液,离型层克重0.3-3 g/m2,离型力100-300Gf/2.5cm,离型量少,离型力低,节省成本。
一种无塑牛皮离型纸的制备工艺,包括以下步骤:
a、先对牛皮原纸进行单面涂覆抗水剂,牛皮原纸吸水性较低,大量抗水剂附着在牛皮原纸的表面,用刮刀涂布的方式将多余的抗水剂刮除,准确控制抗水层的克重;
b、涂覆抗水层后的牛皮纸先进入烘箱干燥,再进行烘缸干燥整饰,烘箱干燥温度60-100℃;出烘箱后纸张保持10-15%的水分,再进入上下组缸干燥,烘缸干燥温度120-140℃;整饰纸面使抗水层更平整,可减少离型液的用量,同时避免单面受热造成纸张卷边的问题;
c、烘缸干燥完成后在牛皮纸的抗水层上涂覆离型液,进入烘箱干燥 ,采用低风量高风温的方式干燥,使离型液快速固化,避免风量过大使离型液在纸面上分布不均;烘箱热风采用导热油加热温度达到180-200℃,风量在100-200m3/h,干燥时间10S-20S;
d、出烘箱后的牛皮离型纸,在纸张两面进行喷雾处理,收卷时纸张水分达到2-6%,避免纸张高温干燥后,纸页中水分含量过低,出现纸张易脆易断的问题。
抗水剂主要成分为机硅改性的丙烯酸树脂。保证纸张具有良好的防渗透性能,又不导致纸张表面出现滚水现象,可以与离型层很好的结合在一起。
离型液为丙烯酸酯类聚合物与醋酸乙烯类(含硅类)化合物混合而成;添加少量含硅类的离型剂可有效降低离型力,实现轻离型并节省成本
具体的,通过本实施方式制备而得到的无塑牛皮离型纸 ,可以轻松的书写,不含塑料成分容易降解,节省成本。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (7)
1.一种无塑牛皮离型纸,其特征在于,包括牛皮原纸,所述牛皮原纸正面涂覆有抗水层,且所述抗水层的上方涂覆有离型层。
2.根据权利要求1所述的一种无塑牛皮离型纸,其特征在于:所述牛皮原纸定量60-100g/m2,纵向抗张强度4-7KN/m,强度高,做成胶带使用时不易被拉断;吸水性15-35g/m2,较低的吸水性,涂覆抗水剂时能更好的附着在牛皮原纸的正面,不会大量被吸收到牛皮原纸内部,节省成本。
3.根据权利要求 所述的一种无塑牛皮离型纸,其特征在于:在所述牛皮原纸单面涂覆抗水剂,取代PE淋膜工艺或含浸工艺,所述抗水层克重2-8g/m2,做到无塑化的同时节省成本。
4.根据权利要求1所述的一种无塑牛皮离型纸,其特征在于:在所述抗水层上涂布离型液,所述离型层克重0.3-3 g/m2,离型力100-300Gf/2.5cm,离型量少,离型力低,节省成本。
5.一种如权利要求1-4任一项所述的无塑牛皮离型纸的制备工艺,其特征在于:包括以下步骤:
a、先对牛皮原纸进行单面涂覆抗水剂,所述牛皮原纸吸水性较低,大量抗水剂附着在牛皮原纸的表面,用刮刀涂布的方式将多余的抗水剂刮除,准确控制抗水层的克重;
b、涂覆抗水层后的牛皮纸先进入烘箱干燥,再进行烘缸干燥整饰,烘箱干燥温度60-100℃;出烘箱后纸张保持10-15%的水分,再进入上下组缸干燥,烘缸干燥温度120-140℃;整饰纸面使抗水层更平整,可减少离型液的用量,同时避免单面受热造成纸张卷边的问题;
c、烘缸干燥完成后在所述牛皮纸的抗水层上涂覆离型液,进入烘箱干燥 ,采用低风量高风温的方式干燥,使离型液快速固化,避免风量过大使离型液在纸面上分布不均;烘箱热风采用导热油加热温度达到180-200℃,风量在100-200m3/h,干燥时间10S-20S;
d、出烘箱后的牛皮离型纸,在纸张两面进行喷雾处理,收卷时纸张水分达到2-6%,避免纸张高温干燥后,纸页中水分含量过低,出现纸张易脆易断的问题。
6.根据权利要求5所述的无塑牛皮离型纸的制备工艺,其特征在于:所述抗水剂主要成分为机硅改性的丙烯酸树脂,保证纸张具有良好的防渗透性能,又不导致纸张表面出现滚水现象,可以与离型层很好的结合在一起。
7.根据权利要求5所述的无塑牛皮离型纸的制备工艺,其特征在于:所述离型液为丙烯酸酯类聚合物与醋酸乙烯类(含硅类)化合物混合而成;添加少量含硅类的离型剂可有效降低离型力,实现轻离型并节省成本。
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CN114351500B (zh) * | 2021-12-20 | 2023-08-15 | 山东东岳高分子材料有限公司 | 一种可重复使用的全氟离子交换膜用离型纸 |
CN114716925A (zh) * | 2022-03-24 | 2022-07-08 | 江苏日邦节能科技有限公司 | 一种一次成型的水性胶牛皮纸胶带制作方法 |
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