CN106079784A - 一种浅网印刷效果好的复合树脂薄膜及其制备方法 - Google Patents
一种浅网印刷效果好的复合树脂薄膜及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种浅网印刷效果好的复合树脂薄膜及其制备方法,薄膜包括浅网印刷层、芯层、热封层;浅网印刷层的原料为:等规聚丙烯,脂肪族聚酰亚胺,聚氨酯,聚芳砜,聚己内酰胺;芯层的原料为:等规聚丙烯,聚苯醚,聚萘二甲酸乙二醇酯,抗静电剂;热封层的原料为:聚碳酸酯,氨基树脂,聚羟基丁酸‑戊酸酯,聚氯乙烯,爽滑剂。制备工艺:采用三层共挤法,控制生产速度和螺杆转速,浅网印刷层从辅1挤出机挤出,挤出温度为225℃,芯层从主挤出机挤出,挤出温度为250℃,热封层从辅2挤出机挤出,挤出温度为225℃。本发明制备的浅网印刷薄膜的极性增强,抗静电性能增强,印刷时具有更好的浅网印刷效果。
Description
技术领域
本发明涉及层状产品领域,具体涉及一种浅网印刷效果好的复合树脂薄膜及其制备方法。
背景技术
浅网印刷技术具有成形性佳、色彩丰富、组合精度高等突出优点,特别适合于在质量要求严、控制水平高的精美印刷制品中应用。浅网印刷技术克服平膜印刷技术所制印刷品容易出现褪色、模糊等问题,将印刷制品的质量向更高层次推进。尽管如此,浅网印刷技术在实际操作过程中往往由于着色不匀、堵板、干板等问题而使印刷制品质量下降。因此,需要对浅网印刷中使用的基体薄膜性能进行优化改良。
目前在市场上普遍使用各种印刷精美的薄膜材料来包装产品。从生产技术和工艺角度来看,薄膜在制备过程中往往添加了比例很高的爽滑剂。添加爽滑剂有助于大规模连续化生产制备薄膜。而由于爽滑剂一般具有较高的化学极性,与非极性的基体薄膜的相容性较差,容易在制备过程中迁移到薄膜表面层,将不利于非极性碳烃类油墨的有效延展铺开,使得薄膜的浅网印刷性能下降。因此在综合考虑薄膜爽滑性能和浅网印刷性能的基础上,通过添加部分含有极性官能团树脂,能够改善基体薄膜的极性,提高爽滑剂与基体薄膜的相容性,达到改善薄膜浅网印刷性能的目标。
在浅网印刷薄膜实际生产及加工过程中,由于产品原料与加工设备之间存在各种机械摩擦,导致浅网印刷薄膜表面富集感应电荷,由于浅网印刷薄膜表面普遍是非极性材料,导电性差,感应电荷无法有效释放或中和,导致存在较高的静电场电势,存在发生火灾等事故的安全隐患。另一方面,由于生产温度及压力的影响,浅网印刷薄膜存放时间长会变软发粘,薄膜之间的阻碍作用力下降,导致薄膜很容易粘连,并且由于强静电场产生的引力作用,使数层薄膜容易附着在一起而难以分开。因此为了提高浅网印刷薄膜的印刷性能,必须降低薄膜印刷层的表面电阻,提高其导电性能,增强薄膜在浅网印刷技术层面上的适用性。
中国专利CN200910116318.5公开了一种用于浅网印刷的BOPP薄膜,使用双向拉伸级聚丙烯树脂经过共挤出和双向拉伸后形成三层构造的薄膜。浅网印刷层按重量百分比含有抗粘连剂2%~4%;防粘连层按重量百分比含有抗粘连剂3%~5%;芯层按重量百分比含有抗静电剂0.8%~1.0%。抗粘连剂为合成硅石,合成硅石的粒径范围在浅网印刷层中有两种,分别为1μm~2μm与2μm~4μm,两者以0.5-1.5∶3.5-4.5配比;在防粘连层中合成硅石粒径为3μm~5μm。但是该专利所制薄膜仅采用聚丙烯原料,没有改善聚丙烯薄膜存在的极性差的问题,而且没有公开所用抗静电剂的具体物质,难以保证产品的抗静电性能。
中国专利CN201510693064.9公开了一种高透明浅网印刷膜及其制备方法,包括位于电晕面印刷表层和复合层之间的芯层;将芯层、电晕面印刷表层、复合层对应组成的原料分别加入对应的高速混合机中混合,混合均匀后芯层原料进入主挤出机,电晕面印刷表层、复合层原料分别进入对应的辅挤出机,主挤出机和辅挤出机的加热区均加热,再经螺杆挤出机融入、纵向拉伸、横向拉伸后,得到产品。但是该专利没有对聚丙烯薄膜进行改性,仍然存在基体薄膜极性差的问题,浅网印刷效果差。
因此,需要提供一种增强浅网印刷薄膜基体的极性,提高浅网印刷薄膜抗静电性能的浅网印刷复合树脂薄膜及其制备方法。
发明内容
本发明针对上述问题,提供一种浅网印刷效果好的复合树脂薄膜及其制备方法。
本发明解决上述问题所采用的技术方案是:
一种浅网印刷效果好的复合树脂薄膜,包括浅网印刷层、芯层、热封层三层结构;
其中形成所述浅网印刷层的原料按重量百分比计包括:等规聚丙烯60%~80%,脂肪族聚酰亚胺5%~10%,聚氨酯5%~10%,聚芳砜3%~10%,聚己内酰胺5%~10%;
其中形成所述芯层的原料按重量百分比计包括:等规聚丙烯65%~85%,聚苯醚5%~10%,聚萘二甲酸乙二醇酯5%~15%,抗静电剂2%~10%;
其中形成所述热封层的原料按重量百分比计包括:聚碳酸酯40%~60%,氨基树脂20%~30%,聚羟基丁酸-戊酸酯10%~15%,聚氯乙烯5%~10%,爽滑剂2%~6%。
进一步地,抗静电剂为:十二烷基聚氧乙烯醚硫酸钠、十四烷基三甲基溴化铵、十四烷基磺丙基甜菜碱、十二烷基苯磺酸钠中的一种或多种。
进一步地,爽滑剂为:邻苯二甲酰亚胺、双三氟甲烷磺酰亚胺、亚甲基丁二酸酐、己二酸酐中的一种或多种。
进一步地,所述浅网印刷层、芯层、热封层的比重分别为:10%~20%,60%~80%,15%~25%。
进一步地,浅网印刷层的厚度为:0.1μm~0.7μm。
进一步地,芯层的厚度为:16μm~20μm。
进一步地,热封层的厚度为:0.1μm~0.7μm。
根据本发明另一发明目的,在于提供一种上述浅网印刷效果好的复合树脂薄膜的制备工艺,采用三层共挤法制备而成,其特征在于,采用三层共挤时,控制生产速度为370m/min~400m/min,控制螺杆转速,原料在主挤出机和辅挤出机的加热区的加热温度为245℃,浅网印刷层从辅1挤出机挤出,挤出温度为225℃,芯层从主挤出机挤出,挤出温度为250℃,热封层从辅2挤出机挤出,挤出温度为225℃。
进一步地,螺杆转速为55r/min~70r/min。
进一步地,浅网印刷层成膜后进行电晕处理。
本发明的优点是:
1.本发明采用极性树脂包括脂肪族聚酰亚胺、聚氨酯、聚芳砜、聚己内酰胺对等规聚丙烯树脂进行改性,制备浅网印刷层,制得的印刷层因为材料表面极性的增强,极大地提高了材料表面的亲水性,有效消除材料表面的感应电荷,以达到消除静电的效果,从而提高薄膜表面的印刷能力,达到浅网印刷的效果;
2.本发明采用聚苯醚、聚萘二甲酸乙二醇酯对等规聚丙烯进行改性,增加了等规聚丙烯薄膜的抗拉伸强度,提高了聚丙烯薄膜的耐低温性能,增强了薄膜的耐腐蚀性,添加抗静电剂能够有效引导等规聚丙烯薄膜因摩擦和放电而积聚的高能静电电荷,可以起到减少薄膜发生卷曲折皱现象的作用,对于改善芯层等规聚丙烯薄膜的弹性性能、理化稳定性及介电性能有十分积极的效果;
3.本发明通过聚碳酸酯、氨基树脂、聚羟基丁酸-戊酸酯和聚氯乙烯高分子材料共聚制备热封层,既能够在常温使用条件下保持有足够的化学稳定性,又能够在适度加热升温的条件下达到良好密封的效果,具有非常适中的热敏度,并且密封程度紧密,无气泡残留,耐受压力作用时亦能保证可靠密封,同时具有良好的环境生物降解特性,无废品残留,可循环利用率高,能够稳定准确的实现热封层薄膜的目标功效。
具体实施方式
以下对本发明的实施例进行详细说明,但是本发明可以由权利要求限定和覆盖的多种不同方式实施。
实施例1
一种浅网印刷效果好的复合树脂薄膜,包括浅网印刷层、芯层、热封层三层结构;
其中形成所述浅网印刷层的原料按重量百分比计包括:等规聚丙烯60%,脂肪族聚酰亚胺10%,聚氨酯10%,聚芳砜10%,聚己内酰胺10%。浅网印刷层的厚度为:0.1μm。
其中形成所述芯层的原料按重量百分比计包括:等规聚丙烯65%,聚苯醚10%,聚萘二甲酸乙二醇酯15%,十二烷基聚氧乙烯醚硫酸钠6%、十四烷基三甲基溴化铵4%。芯层的厚度为:16μm。
其中形成所述热封层的原料按重量百分比计包括:聚碳酸酯40%,氨基树脂30%,聚羟基丁酸-戊酸酯15%,聚氯乙烯10%,邻苯二甲酰亚胺2%、双三氟甲烷磺酰亚胺3%。热封层的厚度为:0.1μm。
浅网印刷层、芯层、热封层的比重分别为:10%,75%,15%。
实施例2
一种浅网印刷效果好的复合树脂薄膜,包括浅网印刷层、芯层、热封层三层结构;
其中形成所述浅网印刷层的原料按重量百分比计包括:等规聚丙烯80%,脂肪族聚酰亚胺5%,聚氨酯5%,聚芳砜5%,聚己内酰胺5%。浅网印刷层的厚度为:0.7μm。
其中形成所述芯层的原料按重量百分比计包括:等规聚丙烯85%,聚苯醚5%,聚萘二甲酸乙二醇酯8%,十四烷基磺丙基甜菜碱1%、十二烷基苯磺酸钠1%。芯层的厚度为:20μm。
其中形成所述热封层的原料按重量百分比计包括:聚碳酸酯60%,氨基树脂20%,聚羟基丁酸-戊酸酯10%,聚氯乙烯8%,亚甲基丁二酸酐0.5%、己二酸酐1.5%。热封层的厚度为:0.7μm。
浅网印刷层、芯层、热封层的比重分别为:20%,55%,25%。
实施例3
一种浅网印刷效果好的复合树脂薄膜,包括浅网印刷层、芯层、热封层三层结构;
其中形成所述浅网印刷层的原料按重量百分比计包括:等规聚丙烯70%,脂肪族聚酰亚胺7%,聚氨酯8%,聚芳砜7%,聚己内酰胺8%。浅网印刷层的厚度为:0.4μm。
其中形成所述芯层的原料按重量百分比计包括:等规聚丙烯75%,聚苯醚8%,聚萘二甲酸乙二醇酯11%,十四烷基磺丙基甜菜碱6%。芯层的厚度为:18μm。
其中形成所述热封层的原料按重量百分比计包括:聚碳酸酯50%,氨基树脂25%,聚羟基丁酸-戊酸酯13%,聚氯乙烯8%,邻苯二甲酰亚胺4%。热封层的厚度为:0.4μm。
浅网印刷层、芯层、热封层的比重分别为:15%,65%,20%。
实施例4
一种浅网印刷效果好的复合树脂薄膜的制备工艺
采用三层共挤法制备而成,采用三层共挤时,控制生产速度为370m/min,控制螺杆转速为55r/min,原料在主挤出机和辅挤出机的加热区的加热温度为245℃,浅网印刷层从辅1挤出机挤出,挤出温度为225℃,芯层从主挤出机挤出,挤出温度为250℃,热封层从辅2挤出机挤出,挤出温度为225℃。浅网印刷层成膜后进行电晕处理。
实施例5
一种浅网印刷效果好的复合树脂薄膜的制备工艺
采用三层共挤法制备而成,采用三层共挤时,控制生产速度为400m/min,控制螺杆转速为70r/min,原料在主挤出机和辅挤出机的加热区的加热温度为245℃,浅网印刷层从辅1挤出机挤出,挤出温度为225℃,芯层从主挤出机挤出,挤出温度为250℃,热封层从辅2挤出机挤出,挤出温度为225℃。浅网印刷层成膜后进行电晕处理。
实施例6
一种浅网印刷效果好的复合树脂薄膜的制备工艺
采用三层共挤法制备而成,采用三层共挤时,控制生产速度为385m/min,控制螺杆转速为63r/min,原料在主挤出机和辅挤出机的加热区的加热温度为245℃,浅网印刷层从辅1挤出机挤出,挤出温度为225℃,芯层从主挤出机挤出,挤出温度为250℃,热封层从辅2挤出机挤出,挤出温度为225℃。浅网印刷层成膜后进行电晕处理。
实验例1
对实施例1~6所制的复合树脂薄膜与普通市售浅网印刷薄膜的薄膜性能进行测试,测试结果如表1所示。
表1 浅网印刷薄膜性能测试结果
结果:与普通市售浅网印刷薄膜相比,本申请实施例1~6所制的浅网印刷复合树脂薄膜具有低雾度,低表面电阻,短电荷衰减半衰期,说明本申请制得的浅网印刷复合树脂薄膜的透明度好,抗静电性能好。并且本申请实施例1~6所制的浅网印刷复合树脂薄膜具有高抗拉强度,低断裂伸长率,高弹性模量,低脆化温度,说明本申请制得的浅网印刷复合树脂薄膜的薄膜质量好,使用寿命长。
结论:本申请制得的浅网印刷复合树脂薄膜根据薄膜层结构与性能的不同,添加不同的树脂原料,对薄膜材料进行改进,并控制薄膜制备过程中的生产参数,使得制得的浅网印刷复合树脂薄膜具有增加极性、增强导电性、增强抗静电性能、增强浅网印刷效果的优点。
以上仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。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)
1.一种浅网印刷效果好的复合树脂薄膜,其特征在于,包括浅网印刷层、芯层、热封层三层结构;
其中形成所述浅网印刷层的原料按重量百分比计包括:等规聚丙烯60%~80%,脂肪族聚酰亚胺5%~10%,聚氨酯5%~10%,聚芳砜3%~10%,聚己内酰胺5%~10%;
其中形成所述芯层的原料按重量百分比计包括:等规聚丙烯65%~85%,聚苯醚5%~10%,聚萘二甲酸乙二醇酯5%~15%,抗静电剂2%~10%;
其中形成所述热封层的原料按重量百分比计包括:聚碳酸酯40%~60%,氨基树脂20%~30%,聚羟基丁酸-戊酸酯10%~15%,聚氯乙烯5%~10%,爽滑剂2%~6%。
2.根据权利要求1所述的复合树脂薄膜,其特征在于,所述抗静电剂为:十二烷基聚氧乙烯醚硫酸钠、十四烷基三甲基溴化铵、十四烷基磺丙基甜菜碱、十二烷基苯磺酸钠中的一种或多种。
3.根据权利要求1所述的复合树脂薄膜,其特征在于,所述爽滑剂为:邻苯二甲酰亚胺、双三氟甲烷磺酰亚胺、亚甲基丁二酸酐、己二酸酐中的一种或多种。
4.根据权利要求1所述的复合树脂薄膜,其特征在于,所述浅网印刷层、芯层、热封层的比重分别为:10%~20%,60%~80%,15%~25%。
5.根据权利要求1所述的复合树脂薄膜,其特征在于,所述浅网印刷层的厚度为:0.1μm~0.7μm。
6.根据权利要求1所述的复合树脂薄膜,其特征在于,所述芯层的厚度为:16μm~20μm。
7.根据权利要求1所述的复合树脂薄膜,其特征在于,所述热封层的厚度为:0.1μm~0.7μm。
8.一种如权利要求1~7中任一项所述的复合树脂薄膜的制备工艺,采用三层共挤法制备而成,其特征在于,采用三层共挤时,控制生产速度为370m/min~400m/min,控制螺杆转速,原料在主挤出机和辅挤出机的加热区的加热温度为245℃,浅网印刷层从辅1挤出机挤出,挤出温度为225℃,芯层从主挤出机挤出,挤出温度为250℃,热封层从辅2挤出机挤出,挤出温度为225℃。
9.根据权利要求8所述的制备工艺,其特征在于,所述螺杆转速为55r/min~70r/min。
10.根据权利要求8所述的制备工艺,其特征在于,所述浅网印刷层成膜后进行电晕处理。
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CN112606504A (zh) * | 2020-11-24 | 2021-04-06 | 苏州奥美材料科技有限公司 | 一种高cti值高阻燃复合薄膜及其制备方法 |
CN112795249A (zh) * | 2021-01-04 | 2021-05-14 | 浙江海顺新材料有限公司 | 一种耐介质低析出高阻隔涂布膜、制备方法 |
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