CN112521874A - 一种耐寒型车身贴 - Google Patents
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Abstract
本发明公开了一种耐寒型车身贴,从上至下包括了PVC膜、压敏胶水、离型纸,所述PVC膜是由压延工艺制造而成的耐寒型压延膜,所述PVC膜包括了以下重量份的物质:PVC树脂粉60‑80份,DINP增塑剂13‑20份,耐寒型增塑剂0.65‑4份,钡锌稳定剂2‑4份,超细碳酸钙0‑20份,超细钛白粉4‑8份,低温改性剂0.4‑1.2份,色料0.01‑0.07份;所述压敏胶水为耐寒型丙烯酸压敏胶水,所述耐寒型丙烯酸压敏胶水的玻璃化转变温度为‑80‑ ‑50℃,本发明提供的耐寒型车身贴在低温环境下,PVC膜依然保持良好的柔软性和韧性,压敏胶层依然保持良好的润湿粘附性,可长期使用粘贴。
Description
技术领域
本发明涉及车身贴领域,具体涉及一种耐寒型车身贴。
背景技术
车身贴是由离型纸的离型面涂布了压敏胶水,再与PVC膜贴合而成,其中,PVC膜通常为由压延工艺制造而成的PVC半硬质膜,具有良好的印刷喷绘、吸墨显色性能,因此,车身贴常被用作数码广告材料,广泛地使用在商场、地铁站厅、公交车、出租车等公共区域或者交通设施上,发挥广告宣传作用。
目前在全世界范围内,PVC类车身贴具有非常突出的流通性,然而在低纬度寒冷地区,普通PVC膜缺乏耐寒性,膜易变脆而发生龟裂,影响车身贴的使用寿命,普通压敏胶在零下十几度的情形下丧失流动性,从而丧失润湿粘附性,无法良好地粘贴,而从原来粘贴的区域脱落。
发明内容
针对现有技术存在的问题,本发明的目的是提供一种耐寒型车身贴,为达到上述目的,本发明是通过以下技术方案实现的:
提供一种耐寒型车身贴,从上至下包括了PVC膜、压敏胶水、离型纸。
所述PVC膜是由压延工艺制造而成的耐寒型压延膜,所述PVC膜包括了以下重量份的物质:
PVC树脂粉 60-80份;
DINP增塑剂 13-20份;
耐寒型增塑剂 0.65-4份;
钡锌稳定剂 2-4份;
超细碳酸钙 0-20份;
超细钛白粉 4-8份;
低温改性剂 0.4-1.2份;
色料 0.01-0.07份。
进一步的,PVC树脂粉的K值(聚合度)为160-2000。
进一步的,耐寒型增塑剂为脂肪酸二元酸酯,其中,脂肪酸二元酸主链上的碳原子个数≥6,脂肪酸二元酸酯主链上的碳原子个数≥20。
所述的耐寒型增塑剂也可以为二元醇脂肪酸酯,其中,二元醇主链上的碳原子个数≥5,二元醇脂肪酸酯主链上的碳原子个数≥12。
所述的耐寒型增塑剂也可以为脂肪酸单酯,其中,脂肪酸主链上的碳原子个数≥15。
所述的耐寒型增塑剂也可以为环氧脂肪酸单酯或者环烷脂肪酸酯。
所述的耐寒型增塑剂也可以为脂肪酸酰胺、N-一取代脂肪酸酰胺、N,N-二取代脂肪酸酰胺中的一种。
进一步的,超细碳酸钙的粒径为0.02-0.1μm。
进一步的,超细钛白粉的粒径为10nm-50nm。
进一步的,低温改性剂为具有低玻璃化转变温度的聚合物,进一步的,所述的低温改性剂为ACR、MBS、CPE、ABS、NBR、SBS、EVA中的一种或几种。
进一步的,所述色料为群青色料、紫色色砂和增白剂的混合物。
所述压敏胶水为耐寒型丙烯酸压敏胶水,所述耐寒型丙烯酸压敏胶水由丙烯酸单体、甲基丙烯酸甲酯单体、丙烯酸丁酯单体和其他丙烯酸类单体共聚而成,其他丙烯酸类单体指丙烯酸正烷基酯、甲基丙烯酸正烷基酯、丙烯酸异烷基酯、甲基丙烯酸异烷基酯中的一种或几种,进一步的,所述的正烷基及所述的异烷基为碳原子个数≥10的饱和烷基。
进一步的,所述耐寒型丙烯酸压敏胶水的玻璃化转变温度为-80 - -50℃。
按照FTM 9测试方法对所述耐寒型车身贴的初粘力进行测试,所述耐寒型车身的初粘力≥15N/25mm。
与现有技术相比,本发明的有益效果是:
1、普通车身贴采用K值在70左右的PVC树脂粉作为原料,本发明采用K值较高的PVC树脂粉作为原料,K值高,则PVC的分子链越长,PVC膜的弹性越好,在零下十几摄氏度的情形下依然保持良好的柔弹性;
2、PVC膜中含有耐寒型增塑剂,所选耐寒型增塑剂为碳链较长的脂肪二元酸二元醇酯、脂肪酸单酯,或者环氧脂肪酸单酯、环烷脂肪酸酯、脂肪酸酰胺、N-一取代脂肪酸酰胺、N,N-二取代脂肪酸酰胺,这类增塑剂相比于一般增塑剂具有更低的凝固点,低温下仍然具有良好的塑化能力,能够保持PVC膜的柔软性;
3、无机填料的添加提高了PVC压延膜的硬度,降低拉伸强度,在低温情形下膜越容易发脆和龟裂,而超细碳酸钙和超细钛白粉相比于普通重质碳酸钙、纳米碳酸钙和钛白粉,粒径非常小,对PVC分子链之间的作用力的影响越小,降低无机填料对PVC膜的低温冲击性能的影响;
4、低温改性剂具有低的玻璃化转变温度,保证PVC膜在低温情形下依然具有柔顺性和韧性;
5、普通丙烯酸压敏胶的玻璃化转变温度在-20℃左右,本发明使用了具有更低玻璃化转变温度的丙烯酸压敏胶,保证耐寒型车身贴在零下十几摄氏度的低温情形下,压敏胶依然具有良好的润湿粘附性能,(甲基)丙烯酸烷基酯单体的烷基链段上的碳原子个数越多,则共聚形成的压敏胶的玻璃化转变温度越低。
具体实施方式
下面结合具体实施例对本发明做进一步的阐述。
实施例一
一种耐寒型车身贴,从上至下包括了PVC膜、压敏胶水、离型纸,所述PVC膜为由压延工艺制造而成的耐寒型压延膜,所述PVC膜包括了以下重量份的物质:
PVC树脂粉 80份;
DINP增塑剂 19份;
耐寒型增塑剂 1.8份;
钡锌稳定剂 3份;
超细碳酸钙 2.4份;
超细钛白粉 6.5份;
低温改性剂 1.2份;
色料 0.012份。
进一步的,PVC树脂粉的K值(聚合度)为800。
进一步的,耐寒型增塑剂为己二酸二辛酯。
进一步的,超细碳酸钙的粒径为0.08μm。
进一步的,超细钛白粉的粒径为35nm。
进一步的,低温改性剂为具有低玻璃化转变温度的聚合物,进一步的,所述的低温改性剂为ACR和MBS的混合物,其中ACR为0.4份,MBS为0.8份。
进一步的,所述色料为群青色料、紫色色砂与增白剂的混合物。
所述压敏胶水为耐寒型丙烯酸压敏胶水,所述耐寒型丙烯酸压敏胶水由丙烯酸单体、甲基丙烯酸甲酯单体、丙烯酸丁酯单体、丙烯酸异辛酯单体、甲基丙烯酸正十二烷酯单体共聚而成。
进一步的,所述耐寒型丙烯酸压敏胶水的玻璃化转变温度为-65℃。
按照FTM9测试方法对所述耐寒型车身贴的初粘力进行测试,所述耐寒型车身贴的初粘力为18N/25mm。
实施例二
提供一种耐寒型车身贴,从上至下包括了PVC膜、压敏胶水、离型纸,所述PVC膜是由压延工艺制造而成的耐寒型压延膜,所述PVC膜包括了以下重量份的物质:
PVC树脂粉60份;
DINP增塑剂 13.4份;
耐寒型增塑剂 3份;
钡锌稳定剂 2.6份;
超细碳酸钙 20份;
超细钛白粉 5.5份;
低温改性剂 0.85份;
色料 0.069份。
进一步的,PVC树脂粉的K值(聚合度)为1000。
进一步的,耐寒型增塑剂为己二酸二异癸酯。
进一步的,超细碳酸钙的粒径为0.02μm。
进一步的,超细钛白粉的粒径为50nm。
进一步的,低温改性剂为具有低玻璃化转变温度的聚合物,进一步的,所述的低温改性剂为ACR和MBS的混合物,其中ACR为0.8份,MBS为0.05份。
进一步的,所述色料为群青色料、紫色色砂和增白剂的混合物。
所述压敏胶水为耐寒型丙烯酸压敏胶水,所述耐寒型丙烯酸压敏胶水由丙烯酸单体、甲基丙烯酸甲酯单体、丙烯酸丁酯单体、甲基丙烯酸异十五烷基酯共聚而成。
进一步的,所述耐寒型丙烯酸压敏胶水的玻璃化转变温度为-75℃。
按照FTM 9测试方法对所述耐寒型车身贴的初粘力进行测试,所述耐寒型车身的初粘力21N/25mm。
Claims (8)
1.一种耐寒型车身贴,从上至下包括了PVC膜、压敏胶水、离型纸,其特征在于,所述PVC膜是由压延工艺制造而成的耐寒型压延膜,所述PVC膜包括了以下重量份的物质:PVC树脂粉60-80份,DINP增塑剂13-20份,耐寒型增塑剂 0.65-4份,钡锌稳定剂2-4份,超细碳酸钙0-20份,超细钛白粉4-8份,低温改性剂0.4-1.2份,色料0.01-0.07份;所述压敏胶水为耐寒型丙烯酸压敏胶水,所述耐寒型丙烯酸压敏胶水的玻璃化转变温度为-80 - -50℃。
2.根据权利要求1所述的一种耐寒型车身贴,其特征在于,所述PVC树脂粉的K值(聚合度)为160-2000。
3.根据权利要求1所述的一种耐寒型车身贴,其特征在于,所述耐寒型增塑剂为脂肪酸二元酸酯、二元醇脂肪酸酯、脂肪酸单酯、环氧脂肪酸单酯、环烷脂肪酸酯、脂肪酸酰胺、N-一取代脂肪酸酰胺、N,N-二取代脂肪酸酰胺中的一种或几种。
4.根据权利要求1所述的一种耐寒型车身贴,其特征在于,所述低温改性剂为具有低玻璃化转变温度的聚合物。
5.根据权利要求5所述的一种耐寒型车身贴,其特征在于,所述低温改性剂为ACR、MBS、CPE、ABS、NBR、SBS、EVA中的一种或几种。
6.根据权利要求1所述的一种耐寒型车身贴,其特征在于,所述耐寒型丙烯酸压敏胶水由丙烯酸单体、甲基丙烯酸甲酯单体、丙烯酸丁酯单体和其他丙烯酸类单体共聚而成,所述其他丙烯酸类单体为丙烯酸正烷基酯、甲基丙烯酸正烷基酯、丙烯酸异烷基酯、甲基丙烯酸异烷基酯中的一种或几种。
7.根据权利要求6所述的一种耐寒型车身贴,其特征在于,所述正烷基为碳原子个数≥10的饱和烷基。
8.根据权利要求6所述的一种耐寒型车身贴,其特征在于,所述异烷基为碳原子个数≥10的饱和烷基。
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