软包铝塑膜热封聚丙烯层的硬度对摩擦系数稳定性的影响研究

Effect of Hardness of Polypropylene Layer on Friction Coefficient Stability of Soft-pack Aluminum-plastic Film

摘要

通过多层共挤淋膜工艺制备含有不同热封聚丙烯层的铝塑膜，热封聚丙烯层中添加固定比例的爽滑剂，以保证所制备得的铝塑膜具有良好的成型能力与加工性。利用纳米压痕仪测试铝塑膜的热封聚丙烯层的硬度，利用摩擦系数仪测试铝塑膜热封聚丙烯层表面的摩擦系数，以考察硬度对初始摩擦系数的影响。同时将所制备得的铝塑膜卷样置于-5℃、25℃、40℃、60℃四个不同温度试验箱中保管，利用摩擦系数仪测试保管后的铝塑膜热封聚丙烯层表面的摩擦系数，考察硬度对摩擦系数稳定性的影响。结果表示，热封聚丙烯层的硬度越高，初始摩擦系数越低，摩擦系数的稳定性越好。

Abstract

Aluminum-plastic films containing different hot-sealed polypropylene layers were prepared through multi-layer co-extrusion and film-coating processes. A fixed proportion of slip agents was added to the hot-sealed polypropylene layer to ensure the prepared aluminum-plastic films possess excellent formability and processability. The hardness of the hot-sealed polypropylene layer was tested using a nanoindentation instrument, while the friction coefficient of the surface of the hot-sealed polypropylene layer was measured with a friction coefficient tester to investigate the impact of hardness on initial friction coefficient. Simultaneously, the prepared aluminum-plastic film rolls were stored in four different temperature test chambers at -5°C, 25°C, 40°C, and 60°C. The friction coefficient of the surface of the hot-sealed polypropylene layer after storage was tested using a friction coefficient tester to examine the effect of hardness on friction coefficient stability. The results indicate that the higher the hardness of the hot-sealed polypropylene layer, the lower the initial friction coefficient, and the better the stability of the friction coefficient.

关键词

热封聚乙烯 / 爽滑剂 / 摩擦系数 / 硬度

Key words

Heat-sealed polyethylene / Slip agent / Friction coefficient / Hardness

参考文献

[1] 聂海平, 吴剑, 吴国岚. 爽滑剂和纺粘开口剂在塑料薄膜中的应用[J]. 塑料助剂, 2017(3):19-22.

[2] ZILLES J U. Anti-Block Additives[J]. Food Hydrocolloids, 2014, 23(9): 1-11.

[3] 任晓兵. 开口爽滑剂在低密度聚乙烯薄膜中的应用[J]. 当代化工, 2017, 46(1):173-176.

[4] 赵世亮, 高盟新材. 爽滑剂对复合制品表面摩擦因数的影响[J], 广东包装, 2012, 45(12):49-51.

[5] ZILLES J U. Anti-Block Additives[J]. Food Hydrocolloids, 2014, 23(9): 1-11.

[6] LUYIMA A, CUI W, HECKMAN C, et al. Examination of copper electrowinning smoothing agents. Part IV: Nucleation and growth of copper on stainless steel[J]. Minerals Metallurgical Processing, 2016, 33(1): 39-46.

[7] CHEN J C, LI J S, HU T, et al. Fundamental study of erucamide used as a slip agent[J], Journal of Vacuum Science & Technology A, 2007, 25(4): 886-892.

[8] DULAL N, SHANKS R, GENGENBACH T, et al. Slip-additive migration, surface morphology, and performance on injection moulded high-density polyethylene closures[J]. Journal of Colloid and Interface Sciences, 2017, 507: 537-545.

[9] DULAL N, SHANKS R, GENGENBACH T, et al. Migration and performance of erucamide slip additive in highdensity polyethylene bottle caps[J]. Journal of Applied Polymer Science, 2018, 135(43): 46822.