CN115029951B - 一种压纹离型纸的制备方法 - Google Patents
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Abstract
本发明属于离型纸技术领域,具体涉及一种新型压纹离型纸的制备方法,利用聚丙烯、聚乙烯具有类似的主链结构,具有类同性,在长链结构上形成交错式连接,且基于甲基的存在,能够形成稳定的间距性,达到均一的交错式共链结构,配合硅油和偶联剂的空间穿插,达到内聚式连接结构;加之硅树脂预聚体的多维活性连接,提高了整体的稳定性和防水防静电性能。本发明解决了现有压纹离型纸的缺陷,利用硅树脂预聚体配合同链化的聚丙烯和聚乙烯,形成稳定的粘接性,并达到提升机械性能的效果。
Description
技术领域
本发明属于离型纸技术领域,具体涉及一种压纹离型纸的制备方法。
背景技术
离型纸又称隔离纸、防粘纸,主要用于贴覆在胶带的表面用于保护胶带表面的胶粘剂层。压纹离型纸相较于普通离型纸,具有良好的排气泡效果,但是压纹离型纸依然存在容易吸水、抗撕裂强度不高的问题,造成其应用受限。
发明内容
针对现有技术中的问题,本发明提供一种压纹离型纸的制备方法,解决了现有压纹离型纸的缺陷,利用硅树脂预聚体配合同链化的聚丙烯和聚乙烯,形成稳定的粘接性,并达到提升机械性能的效果。
为实现以上技术目的,本发明的技术方案是:
一种压纹离型纸的制备方法,包括如下步骤:
步骤1,将涂覆层原材料进行熔融搅拌,得到混合物;所述熔融搅拌的温度为170-200℃,搅拌速度为300-500r/min,时间为30-40min;所述涂覆层原材料的质量配比为聚丙烯70-100份、高密度聚乙烯40-50份、低密度聚乙烯60-80份、硅油5-8份、偶联剂0.1-0.2份、硅树脂预聚体2-4份;
步骤2,将上述混合物加压熔融处理30-50min,然后加入挤出机挤出;所述加压熔融处理的压力为10-15MPa,温度为230-250℃;所述挤出的温度为290-300℃;
步骤3,将混合后的涂覆层材料淋膜至处理好的原纸表面,并采用压花辊压花处理,得到预制复合纸,所述压花处理的温度为220-230℃,且压花辊的线压力为30-50kg/cm;
步骤4,将预制复合纸冷却处理,然后进行低温冷却轮二次冷却处理,得到压纹离型纸粗品;经卷纸、分切得到压纹离型纸。所述冷却处理的温度为30-40℃;二次冷却处理的温度为10-15℃。
进一步的,所述硅油采用硅羟基封端的硅油,硅油以硅羟基封端,能够在端口形成活性羟基结构,能够与树脂材料形成稳定的连接效果,且自身链长基于端口的连接固定,形成稳定的拉伸结构。
所述硅树脂预聚体以三氯甲基硅烷为原料,经控制水解得到,硅树脂预聚体自身富含大量羟基,在整个淋膜层内形成单独据点,并利用羟基形成原位连接结构,配合三氯甲基硅烷转化为的三羟基结构,形成稳定的三维空间结构,大幅度提升了淋膜层的机械性能。所述硅树脂预聚体的制备方法包括:a1,将三氯甲基硅烷加入至无水乙醚中搅拌均匀,形成溶解液,所述三氯甲基硅烷在无水乙醚中的浓度为400g/L;a2,将蒸馏水喷雾至溶解液中,并均速搅拌,得到预制溶液;所述蒸馏水与三氯甲基硅烷的摩尔比为2:1,均速搅拌的搅拌速度为300-500r/min,a3,将预制溶液低温静置2h,得到硅树脂预聚体,所述低温静置的温度为10-20℃,压力为0.2-0.3MPa。利用无水乙醚对水的微溶性,有效的控制三氯甲基硅烷的水解,并利用压力条件下形成低温蒸发,去除氯化氢与乙醚,形成稳定的硅树脂预聚体。
所述偶联剂采用硅烷偶联剂,该硅烷偶联剂与硅油和硅树脂预聚体形成树脂内分散广泛的硅氧结构,将良好的机械性能延续至整个离型纸,提升了离型纸的机械性能。
所述原纸的前处理包括电晕处理,即,原纸在0.6-0.8kW功率下进行电晕处理。
在本技术方案中,聚丙烯、聚乙烯具有类似的主链结构,具有类同性,在长链结构上形成交错式连接,且基于甲基的存在,能够形成稳定的间距性,达到均一的交错式共链结构,配合硅油和偶联剂的空间穿插,达到内聚式连接结构;加之硅树脂预聚体的多维活性连接,提高了整体的稳定性和防水防静电性能。
从以上描述可以看出,本发明具备以下优点:
1.本发明解决了现有压纹离型纸的缺陷,利用硅树脂预聚体配合同链化的聚丙烯和聚乙烯,形成稳定的粘接性,并达到提升机械性能的效果。
2.本发明利用聚丙烯、高密度聚乙烯和低密度聚乙烯形成交错式同链结构,达到提升了树脂材料的交错连接性,提升该材料的稳定性与粘合性。
3.本发明利用硅树脂预聚体的活性提升粘结性,改善残余接着率,离型层不易脱落。
实施方式
结合实施例详细说明本发明,但不对本发明的权利要求做任何限定。
实施例
一种压纹离型纸的制备方法,包括如下步骤:
步骤1,将涂覆层原材料进行熔融搅拌,得到混合物;所述熔融搅拌的温度为170℃,搅拌速度为300r/min,时间为30min;所述涂覆层原材料的质量配比为聚丙烯70份、高密度聚乙烯40份、低密度聚乙烯60份、硅油5份、偶联剂0.1份、硅树脂预聚体2份;所述硅树脂预聚体的制备方法包括:a1,将三氯甲基硅烷加入至无水乙醚中搅拌均匀,形成溶解液,所述三氯甲基硅烷在无水乙醚中的浓度为400g/L;a2,将蒸馏水喷雾至溶解液中,并均速搅拌,得到预制溶液;所述蒸馏水与三氯甲基硅烷的摩尔比为2:1,均速搅拌的搅拌速度为300r/min,a3,将预制溶液低温静置2h,得到硅树脂预聚体,所述低温静置的温度为10℃,压力为0.2MPa;
所述硅油采用硅羟基封端的硅油;所述偶联剂采用KH550;
步骤2,将上述混合物加压熔融处理30min,然后加入挤出机挤出;所述加压熔融处理的压力为10MPa,温度为230℃;所述挤出的温度为290℃;
步骤3,将混合后的涂覆层材料淋膜至处理好的原纸表面,并采用压花辊压花处理,得到预制复合纸,所述压花处理的温度为220℃,且压花辊的线压力为30kg/cm;所述原纸的前处理是原纸在0.6kW功率下进行电晕处理;
步骤4,将预制复合纸冷却处理,然后进行低温冷却轮二次冷却处理,得到压纹离型纸粗品;经卷纸、分切得到压纹离型纸。所述冷却处理的温度为30℃;二次冷却处理的温度为10℃。
实施例
一种压纹离型纸的制备方法,包括如下步骤:
步骤1,将涂覆层原材料进行熔融搅拌,得到混合物;所述熔融搅拌的温度为200℃,搅拌速度为500r/min,时间为40min;所述涂覆层原材料的质量配比为聚丙烯100份、高密度聚乙烯50份、低密度聚乙烯80份、硅油8份、偶联剂0.2份、硅树脂预聚体4份;所述硅树脂预聚体的制备方法包括:a1,将三氯甲基硅烷加入至无水乙醚中搅拌均匀,形成溶解液,所述三氯甲基硅烷在无水乙醚中的浓度为400g/L;a2,将蒸馏水喷雾至溶解液中,并均速搅拌,得到预制溶液;所述蒸馏水与三氯甲基硅烷的摩尔比为2:1,均速搅拌的搅拌速度为500r/min,a3,将预制溶液低温静置2h,得到硅树脂预聚体,所述低温静置的温度为20℃,压力为0.3MPa;
所述硅油采用硅羟基封端的硅油;所述偶联剂采用KH560;
步骤2,将上述混合物加压熔融处理50min,然后加入挤出机挤出;所述加压熔融处理的压力为15MPa,温度为250℃;所述挤出的温度为300℃;
步骤3,将混合后的涂覆层材料淋膜至处理好的原纸表面,并采用压花辊压花处理,得到预制复合纸,所述压花处理的温度为230℃,且压花辊的线压力为50kg/cm;所述原纸的前处理是原纸在0.8kW功率下进行电晕处理;
步骤4,将预制复合纸冷却处理,然后进行低温冷却轮二次冷却处理,得到压纹离型纸粗品;经卷纸、分切得到压纹离型纸。所述冷却处理的温度为40℃;二次冷却处理的温度为15℃。
实施例
一种压纹离型纸的制备方法,包括如下步骤:
步骤1,将涂覆层原材料进行熔融搅拌,得到混合物;所述熔融搅拌的温度为190℃,搅拌速度为400r/min,时间为35min;所述涂覆层原材料的质量配比为聚丙烯80份、高密度聚乙烯45份、低密度聚乙烯70份、硅油7份、偶联剂0.2份、硅树脂预聚体3份;所述硅树脂预聚体的制备方法包括:a1,将三氯甲基硅烷加入至无水乙醚中搅拌均匀,形成溶解液,所述三氯甲基硅烷在无水乙醚中的浓度为400g/L;a2,将蒸馏水喷雾至溶解液中,并均速搅拌,得到预制溶液;所述蒸馏水与三氯甲基硅烷的摩尔比为2:1,均速搅拌的搅拌速度为400r/min,a3,将预制溶液低温静置2h,得到硅树脂预聚体,所述低温静置的温度为15℃,压力为0.3MPa;
所述硅油采用硅羟基封端的硅油;所述偶联剂采用KH570;
步骤2,将上述混合物加压熔融处理40min,然后加入挤出机挤出;所述加压熔融处理的压力为13MPa,温度为240℃;所述挤出的温度为300℃;
步骤3,将混合后的涂覆层材料淋膜至处理好的原纸表面,并采用压花辊压花处理,得到预制复合纸,所述压花处理的温度为230℃,且压花辊的线压力为40kg/cm;所述原纸的前处理是原纸在0.7kW功率下进行电晕处理;
步骤4,将预制复合纸冷却处理,然后进行低温冷却轮二次冷却处理,得到压纹离型纸粗品;经卷纸、分切得到压纹离型纸。所述冷却处理的温度为35℃;二次冷却处理的温度为13℃。
性能检测
可以理解的是,以上关于本发明的具体描述,仅用于说明本发明而并非受限于本发明实施例所描述的技术方案。本领域的普通技术人员应当理解,仍然可以对本发明进行修改或等同替换,以达到相同的技术效果;只要满足使用需要,都在本发明的保护范围之内。
Claims (5)
1.一种压纹离型纸的制备方法,其特征在于:包括如下步骤:
步骤1,将涂覆层原材料进行熔融搅拌,得到混合物;
步骤2,将上述混合物加压熔融处理30-50min,然后加入挤出机挤出;
步骤3,将混合后的涂覆层材料淋膜至处理好的原纸表面,并采用压花辊压花处理,得到预制复合纸;
步骤4,将预制复合纸冷却处理,然后进行低温冷却轮二次冷却处理,得到压纹离型纸粗品;经卷纸、分切得到压纹离型纸;
所述步骤1中的熔融搅拌的温度为170-200℃,搅拌速度为300-500r/min,时间为30-40min;所述涂覆层原材料的质量配比为聚丙烯70-100份、高密度聚乙烯40-50份、低密度聚乙烯60-80份、硅油5-8份、偶联剂0.1-0.2份、硅树脂预聚体2-4份;所述硅油采用硅羟基封端的硅油;所述硅树脂预聚体以三氯甲基硅烷为原料,经控制水解得到;所述硅树脂预聚体的制备方法包括:a1,将三氯甲基硅烷加入至无水乙醚中搅拌均匀,形成溶解液,所述三氯甲基硅烷在无水乙醚中的浓度为400g/L;a2,将蒸馏水喷雾至溶解液中,并均速搅拌,得到预制溶液;所述蒸馏水与三氯甲基硅烷的摩尔比为2:1,均速搅拌的搅拌速度为300-500r/min,a3,将预制溶液低温静置2h,得到硅树脂预聚体,所述低温静置的温度为10-20℃,压力为0.2-0.3MPa。
2.根据权利要求1所述的压纹离型纸的制备方法,其特征在于:所述步骤2中的加压熔融处理的压力为10-15MPa,温度为230-250℃;所述挤出的温度为290-300℃。
3.根据权利要求1所述的压纹离型纸的制备方法,其特征在于:所述步骤3中的原纸的前处理包括电晕处理,即,原纸在0.6-0.8kW功率下进行电晕处理。
4.根据权利要求1所述的压纹离型纸的制备方法,其特征在于:所述步骤3中的压花处理的温度为220-230℃,且压花辊的线压力为30-50kg/cm。
5.根据权利要求1所述的压纹离型纸的制备方法,其特征在于:所述步骤4中的冷却处理的温度为30-40℃;二次冷却处理的温度为10-15℃。
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