CN106928785A - 一种pet薄膜底层用抗静电涂布液及其制备方法和应用 - Google Patents
一种pet薄膜底层用抗静电涂布液及其制备方法和应用 Download PDFInfo
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Abstract
本发明涉及一种PET薄膜底层用抗静电涂布液及其制备方法和应用,PET薄膜底层用抗静电涂布液由如下质量百分比原料制成:成膜物质7-9%、导电型聚噻吩分散液PT2 2.5-3.5%、防粘连剂2.0-3.0%、消泡剂10-20%、表面活性剂1.0-3.0%、溶胀剂4-5%,粘合剂0.3-0.4%,脱盐水60-63%,余量为其他添加剂。使用本发明方法配制出的涂布液不需要电晕辅助,利用化学涂层处理法,成功将高聚物防静电剂导电型聚噻吩PT2引入到底层配方中,一次上车涂布成型,不但很好地解决了底层表面电阻高的难题,使PET底层表面电阻大幅降低,同时不影响涂布液的化学粘附性能和其他性能,且涂布液体系稳定,可以满足工业化连续生产需求。
Description
技术领域
本发明属于印刷用品技术领域,具体涉及一种PET薄膜底层用抗静电涂布液及其制备方法和应用。
背景技术
随着科技的不断进步发展,直接由高分子聚合物所制成的薄膜种类繁多,性能各异,如聚乙烯膜(PE)、聚丙烯膜(PP)、聚氯乙烯膜(PVC)、聚酯膜(PET)、聚苯乙烯膜(PS)、聚偏二氯乙烯膜(PVDC)、乙烯—醋酸乙烯共聚物膜(EVA)等,根据不同市场开发的产品已达上百种之多。其中聚酯薄膜(PET)以其独特的性能,尤其在透明性,防潮性、抗老化性、机械性能等方面具有明显的优势,其抗张强度和抗冲击强度比一般薄膜高得多;且挺度好,尺寸稳定,广泛应用于包装、印刷、制图、办公、广告及医疗影像等领域。但由于PET薄膜表面独特的化学性质,往往不能直接满足各种产品的使用要求,如粘附性能、防静电性能等均表现不尽人意,尤其在印刷胶片领域,以上问题更显得尤为突出。本文重点介绍一种通过化学涂层(底层)方法,对PET薄膜表面进行处理,以改善其表面化学惰性,使其表面具有稳定的化学粘附性能和抗静电性能。由于印刷胶片通常较其他产品在这两方面要求较高,因此此发明也往往适合于其他产品要求。
通常的PET薄膜表面处理技术有电晕法、火焰烧蚀法和化学涂层法几种,由于电晕法和火焰烧蚀法处理效果存在不稳定、易衰退、且操作复杂、效率低等弊病,目前已经逐渐退出主流市场,只适用于一些要求较低的产品,因此,化学涂层处理法已成为当前PET薄膜表面处理的主要手段。
化学涂层法按涂布液一般分为溶剂型和水溶型两大类,由于目前各国对环保要求日益提高,加上溶剂型涂布液通常具有易挥发、易燃易爆、有毒等缺点,且对设备要求较高,所以现在国内一般以水溶型涂布液为主。水溶型底层涂布液一般按组分一般分为聚氨酯类和偏二氯乙烯—甲基丙烯酸—丙烯酸甲酯三元共聚类。此两类涂布液在PET表面涂布后,均具有较好的化学粘附性能,偏二氯乙烯—甲基丙烯酸—丙烯酸甲酯三元共聚类较聚氨酯类更显得突出一些。两种技术无论在配方还是工艺上也均较为成熟,但都存在着涂布后表面电阻过大(T=25℃ RH=60%-65%时,RS>1012欧姆)的缺点,给后序产品的加工和使用都带来致命的伤害。
发明内容
本发明提供一种PET薄膜底层用抗静电涂布液及其制备方法和应用,该制备方法简单易操作,生产条件要求极低;使用该方法配制出的涂布液不需要电晕辅助,利用化学涂层处理法,成功将高聚物防静电剂导电型聚噻吩PT2引入到底层配方中,一次上车涂布成型,不但很好地解决了底层表面电阻高的难题,使PET底层表面电阻大幅降低,同时不影响涂布液的化学粘附性能和其他性能,且涂布液体系稳定,可以满足工业化连续生产需求。
为实现上述目的,本发明采用的技术方案如下:
本发明提供了一种PET薄膜底层用抗静电涂布液,由如下质量百分比原料制成:成膜物质7-9%、导电型聚噻吩分散液PT2 2.5-3.5%、防粘连剂2.0-3.0%、消泡剂10-20%、表面活性剂1.0-3.0%、溶胀剂4-5%,粘合剂0.3-0.4%,脱盐水60-63%,余量为其他添加剂。
根据上述的PET薄膜底层用抗静电涂布液,由如下质量百分比原料制成:成膜物质8.40-8.80%、导电型聚噻吩分散液PT2 2.90-3.15%、防粘连剂2.50-2.85%、消泡剂15.0-18.0%、表面活性剂1.50-2.10%、溶胀剂4.50-4.90%、粘合剂0.33-0.36%、脱盐水60.00-62.00%,余量为其他添加剂。
根据上述的PET薄膜底层用抗静电涂布液,由如下质量百分比原料制成:成膜物质8.77%、导电型聚噻吩分散液PT2 3.07%、防粘连剂2.63%、消泡剂17.5%、表面活性剂1.84%、溶胀剂4.83%、粘合剂0.35%、脱盐水60.91,余量为其他添加剂。
所述成膜物质为含固量为10-16wt%的偏二氯乙烯-甲基丙烯酸-丙烯酸甲酯三元共聚胶乳或含固量为10-16wt%的甲基丙烯酸—甲基丙烯酸丁酯—苯乙烯三元共聚胶乳。
所述防粘连剂为25wt%-30wt%二氧化硅分散液或25wt%-30wt%二氧化钛分散液,分散液中微粒粒径为2-4μm。
所述消泡剂为体积分数90-99%乙醇或体积分数90-99%正丁醇。
所述表面活性剂为十缩聚氧乙烯基辛烷基酚醚或4wt%-10wt%十二烷基硫酸钠水溶液。
所述溶胀剂为15wt%-25wt%间苯二酚水溶液或15wt%-25wt%苯酚水溶液。
所述粘合剂为2wt%-5wt%明胶水溶液。
所述其他添加剂为5wt%-15wt%氢氧化钠水溶液或5wt%-15wt%氢氧化钾水溶液。
所述的PET薄膜底层用抗静电涂布液的制备方法,具体步骤如下:于搅拌速度为100-700r/min条件下称取配方量的成膜物质、导电型聚噻吩分散液PT2、防粘连剂、消泡剂、表面活性剂、溶胀剂、粘合剂、脱盐水和其他添加剂依次加入反应器中,每加入一种物质后应连续搅拌10-30min后方可加入下一种物质,全部加入完成后,连续搅拌30-60min。
一种PET薄膜底层用抗静电涂布液在制作胶片上的应用,具体制作步骤如下:将PET薄膜底层用抗静电涂布液涂布均匀涂布在PET薄膜表面,于温度110~135℃下干燥90~150s,干燥后按胶片的正常生产配方及生产工艺制作。
与现有技术相比,本发明的优点在于:
本发明的独特之处在于不需要电晕辅助,利用化学涂层处理法,成功将高聚物防静电剂导电型聚噻吩PT2引入到底层配方中,一次上车涂布成型,不但很好地解决了底层表面电阻高的难题如涂布后T=25℃ RH=60%—65%时,Rs=106—108欧姆,使PET底层表面电阻大幅降低,同时不影响涂布液的化学粘附性能和其他性能,且涂布液体系稳定,T=25℃时,存放72小时性能稳定,可以满足工业化连续生产需求,投入生产后,经各项性能检测:透光率T=88%—91%、雾度H=10%—14%、表面涂覆感光照相乳剂后各项照相性能合格,达到预期效果。
将印刷用感光乳剂和防光晕料液分别涂布于处理后薄膜表面,经风温40℃、时间2min干燥后,分别用百格法依次在显影、水洗、定影液中测试化学粘附性合格。
具体实施方式
用以下实施例对本发明进一步的描述,但是并不限制本发明的内容。
以下涉及的化学试剂:
所述导电型聚噻吩分散液PT2购买于德国拜耳公司
所述成膜物质:申请人自产
所述防粘连剂:申请人自产
其余明胶、间苯二酚、乙醇等均为国内市场,工业级。
实施例1
成膜物质含固量为10wt%的偏二氯乙烯-甲基丙烯酸-丙烯酸甲酯三元共聚胶乳8.77%、
脱盐水 60.91%
10wt%氢氧化钠溶液 0.1%
导电型聚噻吩分散液PT2 3.07%
25wt%二氧化硅分散液 2.63%
20wt%间苯二酚水溶液 4.83%
4wt%十二烷基硫酸钠水溶液 1.84%
2wt%明胶水溶液 0.35%
体积分数95%乙醇 17.5%
于搅拌速度为100-700r/min条件下称取所述配方按照上述物料罗列顺序依次加入反应器中,每加入一种物质后应连续搅拌10-30min后方可加入下一种物质,全部加入完成后,连续搅拌30-60min,过滤,涂布于PET薄膜表面,在风温115℃,干燥时间120s条件下干燥。
实施例2
成膜物质含固量为10wt%的偏二氯乙烯-甲基丙烯酸-丙烯酸甲酯三元共聚胶乳8.77%、
脱盐水 60.91%
10wt%氢氧化钾溶液 0.1%
导电型聚噻吩分散液PT2 3.07%
30wt%二氧化钛分散液 2.63%
20wt%间苯二酚水溶液 4.83%
十缩聚氧乙烯基辛烷基酚醚 1.84%
2wt%明胶水溶液 0.35%
体积分数99.5%正丁醇 17.5%
于搅拌速度为100-700r/min条件下称取所述配方按照上述物料罗列顺序依次加入反应器中,每加入一种物质后应连续搅拌10-30min后方可加入下一种物质,全部加入完成后,连续搅拌30-60min,过滤,涂布于PET薄膜表面,在风温115℃,干燥时间120s条件下干燥。
实施例3
成膜物质含固量为10wt%的甲基丙烯酸—甲基丙烯酸丁酯—苯乙烯三元共聚胶乳8.77%、
脱盐水 60.91%
10wt%氢氧化钠溶液 0.1%
导电型聚噻吩分散液PT2 3.07%
30wt%二氧化硅分散液 2.63%
20wt%苯酚水溶液水溶液 4.83%
十缩聚氧乙烯基辛烷基酚醚 1.84%
2wt%明胶水溶液 0.35%
体积分数95%乙醇 17.5%
于搅拌速度为100-700r/min条件下称取所述配方按照上述物料罗列顺序依次加入反应器中,每加入一种物质后应连续搅拌10-30min后方可加入下一种物质,全部加入完成后,连续搅拌30-60min,过滤,涂布于PET薄膜表面,在风温115℃,干燥时间120s条件下干燥。
将实施例1-3得到的涂布液涂布后PET薄膜,置于相同环境下T=23℃ RH=62%,平衡30-60min,测试各项性能如下:
结论:比较以上数据,实施例1相比实施例2和实施例3不但配方体系稳定,在性能方面,尤其是抗静电效果优异,完全达到了使用要求。
实施例2由于加料顺序的改变,造成料液体系平衡打破,因此配方的加料顺序也至关重要。
实施例3由于没有放粘连剂的加入,因此雾度较低。
Claims (11)
1.一种PET薄膜底层用抗静电涂布液,其特征在于由如下质量百分比原料制成:成膜物质7-9%、导电型聚噻吩分散液PT2 2.5-3.5%、防粘连剂2.0-3.0%、消泡剂10-20%、表面活性剂1.0-3.0%、溶胀剂4-5%,粘合剂0.3-0.4%,脱盐水60-63%,余量为其他添加剂。
2.根据权利要求1所述PET薄膜底层用抗静电涂布液,其特征在于由如下质量百分比原料制成:成膜物质8.40-8.80%、导电型聚噻吩分散液PT2 2.90-3.15%、防粘连剂2.50-2.85%、消泡剂15.0-18.0%、表面活性剂1.50-2.10%、溶胀剂4.50-4.90%、粘合剂0.33-0.36%、脱盐水60.00-62.00%,余量为其他添加剂。
3.根据权利要求1所述的PET薄膜底层用抗静电涂布液,其特征在于:所述成膜物质为含固量为10-16wt%的偏二氯乙烯-甲基丙烯酸-丙烯酸甲酯三元共聚胶乳或含固量为10-16wt%的甲基丙烯酸—甲基丙烯酸丁酯—苯乙烯三元共聚胶乳。
4.根据权利要求1所述的PET薄膜底层用抗静电涂布液,其特征在于:所述防粘连剂为25wt%-30wt%二氧化硅分散液或25wt%-30wt%二氧化钛分散液,分散液中微粒粒径为2-4μm。
5.根据权利要求1所述的PET薄膜底层用抗静电涂布液,其特征在于:所述消泡剂为体积分数90-99%乙醇或体积分数90-99%正丁醇。
6.根据权利要求1所述的PET薄膜底层用抗静电涂布液,其特征在于:所述表面活性剂为十缩聚氧乙烯基辛烷基酚醚或4-10wt%十二烷基硫酸钠水溶液。
7.根据权利要求1所述的PET薄膜底层用抗静电涂布液,其特征在于:所述溶胀剂为15wt%-25wt%间苯二酚水溶液或15wt%-25wt%苯酚水溶液。
8.根据权利要求1所述的PET薄膜底层用抗静电涂布液,其特征在于:所述粘合剂为2wt%-5wt%明胶水溶液。
9.根据权利要求1所述的PET薄膜底层用抗静电涂布液,其特征在于:所述其他添加剂为5wt%-15wt%氢氧化钠水溶液或5wt%-15wt%氢氧化钾水溶液。
10.一种如权利要求1所述的PET薄膜底层用抗静电涂布液的制备方法,其特征在于具体步骤如下:于搅拌速度为100-700r/min条件下称取配方量的成膜物质、导电型聚噻吩分散液PT2、防粘连剂、消泡剂、表面活性剂、溶胀剂、粘合剂、脱盐水和其他添加剂依次加入反应器中,每加入一种物质后应连续搅拌10-30min后方可加入下一种物质,全部加入完成后,连续搅拌30-60min。
11.一种如权利要求1所述PET薄膜底层用抗静电涂布液在制作胶片上的应用,其特征在于具体制作步骤如下:将PET薄膜底层用抗静电涂布液均匀涂布在PET薄膜表面,于温度110~135℃下干燥90~150s,干燥后按胶片的正常生产配方及生产工艺制作。
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