活化油剂及活化条件对涤纶工业丝/橡胶界面粘合强度的影响

现代纺织技术 ›› 2023, Vol. 31 ›› Issue (3): 163-171.

活化油剂及活化条件对涤纶工业丝/橡胶界面粘合强度的影响

1.浙江理工大学材料科学与工程学院，杭州310018； 2.绍兴市科技创新创业服务中心，浙江绍兴312000； 3.浙江古纤道绿色纤维有限公司，浙江绍兴312000

收稿日期:2022-09-08 出版日期:2023-05-10 网络出版日期:2023-05-25
作者简介:施强(1997—)，男，安徽池州人，硕士研究生，主要从事涤纶工业丝的改性与应用方面的研究。
基金资助:
绍兴市“揭榜挂帅”制科技项目(2021B41002)

Effects of activating oil and activating conditions on the interfacial adhesion of polyester industrial yarn /rubber

1. College of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; 2. Shaoxing Science and Technology Innovation and Entrepreneurship Service Center, Shaoxing 312000, China;3. Zhejiang Guxiandao Polyester Dope Dyed Yarn Co., Ltd., Shaoxing 312000, China

Received:2022-09-08 Published:2023-05-10 Online:2023-05-25

摘要/Abstract

摘要： 为实现一次浸胶涤纶工业丝与橡胶间界面粘合强度的可控增强，在活化油剂中添加封端异氰酸酯，在橡胶的硫化过程中同步完成活化粘合。研究了活化油剂乳液质量分数、封端异氰酸酯添加量和活化工艺对涤纶工业丝/橡胶粘合性能的影响。结果表明：当活化油剂乳液质量分数为5%、封端异氰酸酯质量分数为2%时，涤纶工业丝表面间苯二酚-甲醛-胶乳（RFL）附着牢度、复合橡胶的H-抽出力与剥离强度达到最高；而随活化温度和活化时间的增加，H-抽出力先增大后减小。本文涤纶工业丝/橡胶的H-抽出力达21.1 N，接近常规一次浸胶样品的2倍，显著缩小了与二次浸胶样品（H-抽出力27 N）的差距。相较于市场同类产品，含异氰酸酯活化油剂处理后涤纶工业丝/橡胶的H-抽出力和涤纶帘子线尺寸稳定性明显改善。

关键词: 涤纶工业丝, 活化油剂, 封端异氰酸酯, H-抽出力, 剥离强度

Abstract: In recent years, the demand for tires in China is increasing rapidly, in which radial tires are the main product. HMLS polyester industrial yarns have obvious advantages as the frame material of tire due to low cost, small elongation deformation, good dimensional stability, high modulus and low thermal shrinkage. However, the modulus and polarity of the HMLS polyester industrial yarn and rubber have great difference, leading to low interface adhesion, and a peeling failure. Therefore, it becomes an important research direction to enhance the bonding performance of the interface between the polyester industrial yarn and rubber.
In this paper, based on the existing conventional methods of preparing polyester cords by dipping polyester industrial yarns, the one-step dipping method is improved to make its performance close to that of the product by two-step dipping. In the two-step dipping method, resorcinol formaldehyde latex (RFL) is used to pretreat polyester industrial yarns and then compounded with rubber to achieve a high interface adhesion. While in the one-dip method, the yarn can be oiled with an activated oil agent during spinning, and RFL and rubber matrix compounding can be carried out without pre-treatment of polyester industrial yarns. Compared with the two-dip method, the one-dip method has the advantages of short process, energy saving and consumption reduction, but the bonding strength between the polyester industrial yarn and rubber is lower. In this paper, the blocked isocyanate is added to the activated oil agent and then oil is applied during spinning. The polyester industrial yarn is dipped in the one-dip method, and then compounded with rubber. During the subsequent vulcanization of rubber, the blocked isocyanate component is simultaneously activated by thermal effect to realize the interface reinforcement between the fiber and rubber. The effect of emulsion mass fraction of activating oil, amount of blocked isocyanate and activation technology on the interfacial adhesion between the polyester industrial yarn and rubber were systematically studied. The results show that, the adhesion fastness of RFL on the surface of the polyester industrial yarn increases at first and then decreases with the increase of emulsion mass fraction of activating oil. The maximum H-pull force of the polyester industrial yarn/rubber reaches its maximum value at an emulsion mass fraction of activating oil of 5%. With the increase of the blocked isocyanate content, the adhesion fastness of RFL on the surface of the polyester industrial yarn, the H-pull force and peeling strength of polyester industrial yarn/rubber increase at first and then decrease, and the maximum values are recorded at a blocked isocyanate content of 2%. With the increase of activation temperature or activation time, the H-pull force of polyester industrial yarn/rubber firstly increases and then decreases, and reaches the peak value at 140 ℃ or 2 h. The H-pull force of polyester industrial yarn/rubber treated with activating oil (containing isocyanate) is 21.1N, almost twice of the force for the similar samples obtained via the general one-dip method, and significantly reducing the difference with that of the two-dip treated samples (H-pull force 27 N). Compared with the similar commercial products, the H-pull force of polyester industrial yarn/rubber and the dimensional stability of polyester cord treated with activating oil containing isocyanates are significantly improved.
Based on the one-dip method, the polyester industrial yarn is modified with activating oil (containing isocyanate) and contributes the adhesion between the polyester industrial yarn and rubber without affecting its dimensional stability. This study provides a new idea for the modification of polyester industrial yarns for cords, and also provides a reference for the modification of other tire frame materials.

Key words: polyester industrial yarn, activating oil agent, blocked isocyanate, H-extraction force, peel strength, dimensional stability

中图分类号:

TQ330.6+8

施强, 任春颖, 石教学, 郑雄, 张须臻. 活化油剂及活化条件对涤纶工业丝/橡胶界面粘合强度的影响[J]. 现代纺织技术, 2023, 31(3): 163-171.

SHI Qiang, REN Chunying, SHI Jiaoxue, ZHENG Xiong, ZHANG Xuzhen. Effects of activating oil and activating conditions on the interfacial adhesion of polyester industrial yarn /rubber[J]. Advanced Textile Technology, 2023, 31(3): 163-171.

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