【作者】 何琴玲；

【导师】 林中祥；

【作者基本信息】 南京林业大学 ， 化学工艺， 2010， 硕士

【摘要】 热熔压敏胶(HMPSA)在标签应用中会出现质量不稳定、渗油等问题,使得标签产生起皱、翘边、脱落等现象,因此其产品质量保障尤为突出。本文进行了最佳增粘树脂的选择及热熔压敏胶性能影响因素分析,并获得标签热熔压敏胶的最佳配方。结果表明:标签用HMPSA的最佳增粘树脂为软化点在100℃左右的萜烯树脂和松香季戊四醇酯;环烷油对标签HMPSA的初粘力和渗油性影响最大;获得正交最优配方为SIS-A:环烷油4010:增粘树脂= 30:25:50(质量比)。本文还研究了苯乙烯系热塑性弹性体(SIS)结构变量对HMPSA性能影响。研究表明:苯乙烯含量由14%上升至30%,软化点由75℃上升至89℃,180°剥离强度由5.6 N·cm-1升高至8.4 N·cm-1,初粘力由2.2 cm降低至5.4 cm;双嵌段SI含量由7%升高至38%,180°剥离强度由4.2 N·cm-1上升至10.1 N·cm-1;熔融流动指数(MI)由8 g/10min升高至25 g/10min,175℃熔融黏度由9200 mPa·s下降至2200 mPa·s。本文最后利用差式扫描量热分析法(DSC)研究各种增粘树脂与弹性体相容性。研究发现:弹性体的DSC曲线充分体现其典型的微观两相分离结构;不同类型增粘树脂软化点与其Tg间线性关系不同;融入SIS不同相的增粘树脂对其两相Tg影响不同。更多还原

【Abstract】 Hot melt pressure sensitive adhesive (HMPSA) used in label had many quality problems such as unstable quality or permeability in applications, to cause the label wrinkling, sticking out or falling off. So the quality guarantee of HMPSA has been particularly outstanding.The selection of optimum tackifying resin and the analysis of influencing factors of HMPSA were firstly researched in this paper. And the optimum formula of label HMPSA was obtained. The results indicate that the optimum tackifying resin for label HMPSA was rosin pentaerythritol ester or terpene resin with softening point of 100℃. The existence of naphthenic oil has affected the initial adhesion and oil penetration of label HMPSA the most. The optimum formula of label HMPSA was SIS-A: naphthenic oil 4010: tackifier resins = 30:25:50(mass ratio).Influences of the structure variable of styrene series thermoplastic elastomer on the properties of HMPSA were also studied. The research demonstrates that when the styrene content was increased from 14% to 30%, the softening point of HMPSA was increased from 75℃to 89℃,and 180opeel strength was increased from 5.6 N·cm-1 to 8.4 N·cm-1,and the initial adhesion was decreased from 2.2 cm to 5.4 cm; when the diblock copolymer content was increased from 7% to 38%,180opeel strength was increased from 4.2 N·cm-1 to 10.1 N·cm-1; when the melt flow index was decreased from 8 g/10min to 25 g/10min, melt viscosity of 175℃was decreased from 9200 mPa·s to 2200 mPa·s.At last, differential scanning calorimetry (DSC) analysis was used to research the compatibility of various kinds of tackifying resin and styrene series thermoplastic elastomer. Through the study we found that the DSC curve of styrene type-thermoplastic elastomer presented typical micro-structure of two-phase separation.The quantitative relationship between Tg and the softening point of different tackifier resins was diverse. The tackifying resins which were dissolved in different phases of SIS had different effects on the two phases′Tg.更多还原