CN109206785A - 一种高光泽高精度车身贴膜的生产配方及工艺 - Google Patents
一种高光泽高精度车身贴膜的生产配方及工艺 Download PDFInfo
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Abstract
本发明涉及一种车身贴膜的生产配方及其工艺。实际生产中为了制造高光泽的车贴膜，压延机一般用高温生产。但是高温生产让聚合物物料粘性系数下降，物料内应力得到缓和，蠕变容易发生，这样会造成车贴薄膜表面和透光形成较重的流纹，降低了成品的档次和喷绘效果。本发明其特征在于每100份PVC树脂中投入以下重量比的原料制成；18‑35份增塑剂、2‑4份稳定剂、0‑5份填充剂、0.3‑0.8份紫外光吸收剂、0.3‑0.5份抗氧剂、2‑10份阻燃剂、1‑3份加工助剂、1‑15份钛白粉0.5‑1份色料。本发明的薄膜从主机剥离后，通过水冷急速冷却，阻止蠕变的发生。同时生产只需要极少的拉伸率，减少了流纹的产生，提高了车贴膜的品质和喷绘性。
Description
技术领域
本发明涉及车身贴膜生产技术领域，尤其涉及到一种车身贴膜的生产配方及其工艺。
背景技术
现代社会日益更新，数字广告运用越来越广泛。车贴广告喷绘制品作为数码喷绘的一个重要成员，逐渐被人们所关注。如何生产一种，高清晰度、高光泽的高品质车贴膜是各种生产厂家重点关注的。如图1所示，传统这类车贴广告喷绘制品的生产工艺是：配料、混合、行星机塑化、A开炼机塑化、过滤、B开炼机保温喂料、压延成型、冷却、切边、卷取、包装。
常规的工艺在压延生产中，不可避免的是引取轮的析出。这些析出物一般是润滑剂、稳定剂、增塑剂等低熔点油脂物质。如果积少成多，就会带到薄膜的表面，很大的影响薄膜的喷绘印刷性。一般的处理方式是后面冷却轮采取包布或者包纸，但是效果有限。实际生产中为了制造高光泽的车贴膜，压延机一般用高温生产。但是高温生产让聚合物物料粘性系数下降，物料内应力得到缓和，蠕变容易发生，这样会造成车贴薄膜表面和透光形成较重的流纹，降低了成品的档次和喷绘效果。
发明内容
针对现有技术的不足，本发明旨在提供一种高光泽高精度车身贴膜的生产配方及工艺，具有高光泽度、高清晰度、高阻燃和高耐候性。
为实现上述目的，本发明采取的技术方案如下：一种高光泽高精度车身贴膜的生产配方，其特征在于每100份PVC树脂中投入以下重量比的原料制成；18-35份增塑剂、2-4份稳定剂、0-5份填充剂、0.3-0.8份紫外光吸收剂、0.3-0.5份抗氧剂、2-10份阻燃剂、1-3份加工助剂、1-15份钛白粉0.5-1份色料。
每100份PVC树脂中投入以下重量比的原料制成；26份增塑剂、3份稳定剂、5份填充剂、0.5份紫外光吸收剂、0.5份抗氧剂、8份阻燃剂、2份加工助剂、12份钛白粉0.6份色料。
所述的PVC为聚合度800-1000的乙烯法PVC树脂；所述的增塑剂为己二酸聚酯型增塑剂和偏苯三酸三辛酯(TOTM)；所述稳定剂为钙锌复合稳定剂；所述填充剂为纳米级活性碳酸钙；所述紫外线吸收剂为UV-P；所述抗氧剂为1010；所述阻燃剂为三氧化二锑；所述加工助剂为ACR型PVC加工助剂；所述钛白粉为金红石钛白粉；所述色料为高耐候级色料。
聚合度800-1000的乙烯法PVC树脂容易加工，减少鱼眼、黑点等改色膜瑕疵；己二酸聚酯型增塑剂和偏苯三酸三辛酯(TOTM)为高分子型增塑剂相比常规的低分子增塑剂邻苯二甲酸二辛酯(DOP)拥有卓越的抗迁移、耐高温性，能够加大改色膜的使用寿命；钙锌复合稳定剂相比普通复合稳定剂有低气味、环保的优点；少量的纳米活性钙能够提高改色膜的韧性同时不影响光泽度；紫外线吸收剂为UV-P、抗氧剂为1010、阻燃剂三氧化二锑在PVC中具有优异的阻燃性。金红石钛白粉具有优异的遮光性、高耐候级色料能够使改色膜在户外的恶劣环境长时间保持颜色鲜艳和自然光泽。
一种高光泽高精度车身贴膜的生产工艺，其特征在于所述步骤如下：配料、混合、行星机塑化、A开炼机塑化、过滤、B开炼机保温喂料、压延成型、软水冷却、烘干回温、冷却、切边、卷取、包装，所述的软水冷却是采取溢流的方式不断的用循环水将薄膜表面的油渍清理干净。
所述的混合是将配好的配方投入到高速搅拌机内进行混合，搅拌时间为200S-400S,搅拌温度为100℃-120℃；高速混合后放入低速冷搅拌机冷却温度为60℃-80℃。
所述的行星机塑化为封闭式塑化，塑化温度主螺杆控制在160℃-190℃，M1控制在165℃-195℃。
所述的A开炼机塑化为开放式塑化，控制开炼机温度为180℃-210℃。
所述的过滤网目数设置在120目-200目，过滤机温度设置在140℃-180℃。
所述的B开炼机温度控制在160℃-190℃，经B开炼机喂料进行5辊压延，压延温度设置在150℃-200℃。
所述的软水水槽过水处理，水温40-60℃，通过烘干回温冷却轮将表面水分烘干，分为3组，第一组120-140℃，第二组100-115℃，第三组60-75℃，后面经过冷却轮冷却至常温。
在常规的聚合物加工工艺条件下，一般是先形成不完善的微晶(晶片)，形成成球晶、纤维状晶、串晶等，其中一般是球晶占主体，纤维状晶、串晶相对较少。由于球晶是由微晶成束并弯曲而成，不会出现单方向的折射，表现为散射，并其尺寸可达几微米甚至几毫米，已完全可影响可见光区，因此，球晶的多少与大小直接影响光泽度。以球晶数量少，尺度(粒径)小的材料光泽度高。与传统生产工艺对比，本发明改良后的新工艺并没有采取的将聚合物从熔融状态缓慢下降到某一温度并保温一段时间，而是通过水冷将聚合物从熔融状态急速冷却到Tg以下，使分子链迅速冻结，形成无定型聚合物。由于结晶的状态与聚合物的受热过程密切相关。若缓慢冷却，可获得大尺度(粒径)的晶体及较大的结晶率，同时晶核不稳定，晶体数目增加，若急速冷却，结晶率下降，晶体粒径急剧下降，晶体数目减少。所以选用软水冷却的新工艺比常规工艺生产的光泽度更加高。
本发明的新工艺中水冷却是采取溢流的方式不断的用循环水将薄膜表面的油渍清理干净。同时水冷选用的是软水，具有优异的洗涤性，同时不容易产生水垢。通过这种方式生产出来的薄膜表面光洁度高，喷绘印刷后精度高。
本发明中薄膜从主机剥离后，通过水冷急速冷却，阻止蠕变的发生。同时生产只需要极少的拉伸率，减少了流纹的产生，提高了车贴膜的品质和喷绘性。
附图说明
图1为现有工艺的结构示意图。
图2为本发明工艺的结构示意图。
具体实施方式
下面结合附图对本发明作进一步详细描述。
如图2所示，实施例1：一种高光泽高精度车贴膜的生产配方，以重量份计：
本发明的生产工艺是将实施例1的配方的原料以重量份计放入高速搅拌机中搅拌，搅拌时间260S,控制温度110℃；随后放入低速冷搅拌机中搅拌至温度50℃，然后投入行星机进行封闭式塑化，主螺杆温度控制在170℃，M1温度控制在175℃；紧接着物料移至双辊扎轮机A进一步塑化，并控制温度在185℃，再经过过滤机过滤杂质，过滤目数为150目，过滤机温度175℃。过滤后物料放入双辊扎轮机B保温储料并给压延主机喂料，温度控制在170℃，物料进入五辊压延主机压延成型，各主控制温度为1#轮195℃、2#轮195℃、3#轮198℃、4#轮202℃、5#轮180℃，成型高温的聚氯乙烯进入软水水槽冷却，水温45-55℃。离开水槽后进行烘干回温第一组125℃，第二组100℃，第三组70℃，后面经过冷却轮冷却至常温。然后切边、卷取、包装，制得成品。
上述内容仅为本发明的较佳实施举例，并不用于限制本发明。凡在本发明精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
Claims (10)
1.一种高光泽高精度车身贴膜的生产配方，其特征在于每100份PVC树脂中投入以下重量比的原料制成；18-35份增塑剂、2-4份稳定剂、0-5份填充剂、0.3-0.8份紫外光吸收剂、0.3-0.5份抗氧剂、2-10份阻燃剂、1-3份加工助剂、1-15份钛白粉0.5-1份色料。
2.根据权利要求1所述的一种高光泽高精度车身贴膜的生产配方，其特征在于每100份PVC树脂中投入以下重量比的原料制成；26份增塑剂、3份稳定剂、5份填充剂、0.5份紫外光吸收剂、0.5份抗氧剂、8份阻燃剂、2份加工助剂、12份钛白粉0.6份色料。
3.根据权利要求1所述的一种高光泽高精度车身贴膜的生产配方，其特征在于所述的PVC为聚合度800-1000的乙烯法PVC树脂；所述的增塑剂为己二酸聚酯型增塑剂和偏苯三酸三辛酯(TOTM)；所述稳定剂为钙锌复合稳定剂；所述填充剂为纳米级活性碳酸钙；所述紫外线吸收剂为UV-P；所述抗氧剂为1010；所述阻燃剂为三氧化二锑；所述加工助剂为ACR型PVC加工助剂；所述钛白粉为金红石钛白粉；所述色料为高耐候级色料。
4.一种高光泽高精度车身贴膜的生产工艺，其特征在于所述步骤如下：配料、混合、行星机塑化、A开炼机塑化、过滤、B开炼机保温喂料、压延成型、软水冷却、烘干回温、冷却、切边、卷取、包装，所述的软水冷却是采取溢流的方式不断的用循环水将薄膜表面的油渍清理干净。
5.根据权利要求4所述的一种高光泽高精度车身贴膜的生产工艺，其特征在于所述的混合是将配好的配方投入到高速搅拌机内进行混合，搅拌时间为200S-400S,搅拌温度为100℃-120℃；高速混合后放入低速冷搅拌机冷却温度为60℃-80℃。
6.根据权利要求5所述的一种高光泽高精度车身贴膜的生产工艺，其特征在于所述的行星机塑化为封闭式塑化，塑化温度主螺杆控制在160℃-190℃，M1控制在165℃-195℃。
7.根据权利要求6所述的一种高光泽高精度车身贴膜的生产工艺，其特征在于所述的A开炼机塑化为开放式塑化，控制开炼机温度为180℃-210℃。
8.根据权利要求7所述的一种高光泽高精度车身贴膜的生产工艺，其特征在于所述的过滤网目数设置在120目-200目，过滤机温度设置在140℃-180℃。
9.根据权利要求8所述的一种高光泽高精度车身贴膜的生产工艺，其特征在于所述的B开炼机温度控制在160℃-190℃，经B开炼机喂料进行5辊压延，压延温度设置在150℃-200℃。
10.根据权利要求9所述的一种高光泽高精度车身贴膜的生产工艺，其特征在于所述的软水水槽过水处理，水温40-60℃，通过烘干回温冷却轮将表面水分烘干，分为3组，第一组120-140℃，第二组100-115℃，第三组60-75℃，后面经过冷却轮冷却至常温。
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