PET片材印刷UV墨耐紫外老化性研究  

Fluorescence UV Aging Resistance of PET Sheet Printed with UV Curing Ink

作　　者：梁盛华 刘坤宏 LIANG Sheng-hua;LIU Kun-hong(Yibin Wuliangye Co.,Ltd.,Yibin 644007,China)

机构地区：[1]宜宾五粮液股份有限公司,四川宜宾644007

出　　处：《包装工程》2020年第21期103-108,共6页Packaging Engineering

摘　　要：目的研究PET料的加工流变性,以及片材印刷油墨的UV吸收性能。方法以PET为原料,经添加紫外屏蔽剂(UVSA)挤出为PET光栅,再经UV固化油墨(UVCI)印刷等工艺成为户外使用制品,对添加不同配比UVSA的PET光栅片材和UVCI印刷的片材进行荧光紫外老化试验(FUA)。结果在同等条件下,PET光栅片材中添加1%(质量分数)的UVSA,吸收UV波长从330 nm上升到380 nm,吸收度随着UVSA含量的增加而增加。PET片材老化32h后,青色(C)、洋红色(M)、黄色(Y)、黑色(K)印刷的色差△E均在2.0左右,老化168 h时后?E均保持在3.0左右。UVCI随FUA时间的增加色差值逐渐变大,PET光栅制品的颜色差异也会越大。结论添加UVSA有利于提高户外透明PET片材印刷制品的抗老化性能,是延缓老化速率、提高UVCI耐候性的有效方法。The work aims to study the processing rheology of PET materials and the UV absorption of PET sheets printed with curing ink.PET was compounded with different ratio of UV shielding agent(UVSA),then extruded into lenticular sheet for outdoor purpose,and printed with UV curing ink(UVCI).Then,FUA test was conducted on the PET lenticular sheet of different UVSA and sheet printed with UVCI.Under the same conditions,the addition of 1%UVSA(mass fraction)to the PET sheet increased the UV absorption wavelength from 330 nm to 380 nm,and the shielding effect of UV increased with the increase of UVSA content.The color difference△E of the sheet printed respectively with UVCI of cyan(C),magenta(M),yellow(Y),black(K)was all around 2.0 after aging for 32 h,and kept at around 3.0 after ageing for 168 h.With the increase of FUA time,the color difference of UVCI gradually increased,and the color difference of PET grating products also increased.In conclusion,the addition of UVSA is beneficial to improve the anti-aging performance of outdoor transparent PET sheets,and is an effective method to delay the aging rate and improve the weather resistance of UVCI.

关 键 词：紫外光屏蔽剂 UV墨 色差 紫外老化 

分 类 号：TS803[轻工技术与工程]