Hot-Melt Adhesives: Fundamentals, Formulations, and Applications: A Critical Review

IF 3.5 Q2 Materials Science

Reviews of Adhesion and Adhesives Pub Date : 2020-03-01 DOI:10.7569/raa.2020.097301

Swaroop Gharde, G. Sharma, B. Kandasubramanian

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引用次数: 6

Abstract

Hot-Melt Adhesives (HMAs) are typically used in applications where instant sealing is critically required. HMAs are generally preferred for those applications where processing speed is critical. These materials are widely used in various engineering applications, mainly as sealants in leakages and crack filling of walls and roofs. The industrial use of HMAs is most common in glassware and automobiles for gluing glasses in buildings and bonding heavy motor parts. The formulation of HMAs contains a polymer of suitable nature that makes the base for a strong adhesive, and waxes are added to increase the settling time of adhesive. The tackifiers are used to dilute the polymer to adjust the Glass Transition Temperature (Tg) and to reduce the viscosity for proper flow of hot-melt. This review intends to comprehensively discuss the preparation and formulations of HMAs using various polymer matrices, along with their applications and mechanics. The designing of green HMAs has been discussed in the literature and have been promoted over conventional solvent-based HMAs due to their functionality without Volatile Organic Compounds (VOCs). Various measures, challenges, and resolutions for making hazard-free HMAs have been discussed in the present review.

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热熔粘合剂：基本原理、配方和应用：综述

热熔粘合剂（HMA）通常用于急需即时密封的应用中。HMA通常优选用于处理速度至关重要的那些应用。这些材料广泛应用于各种工程应用中，主要用作墙壁和屋顶渗漏和裂缝填充的密封剂。HMA的工业用途最常见于玻璃器皿和汽车中，用于粘合建筑物中的玻璃和粘合重型电机零件。HMA的配方含有一种性质合适的聚合物，它是强力粘合剂的基础，并添加蜡以增加粘合剂的沉淀时间。增粘剂用于稀释聚合物以调节玻璃化转变温度（Tg）并降低粘度以使热熔物适当流动。这篇综述旨在全面讨论使用各种聚合物基质的HMA的制备和配方，以及它们的应用和力学。绿色HMA的设计已经在文献中进行了讨论，并且由于其在不含挥发性有机化合物（VOC）的情况下的功能性，已经比传统的基于溶剂的HMA得到了推广。本综述讨论了制造无危害HMA的各种措施、挑战和解决方案。

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来源期刊

Reviews of Adhesion and Adhesives MATERIALS SCIENCE, MULTIDISCIPLINARY-

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期刊介绍： With the explosion of research activity and reports, the need for concise and critical reviews of topics of contemporary research interest is manifest. Reviews of Adhesion and Adhesives (RAA) provides in-depth, incisive, illuminating and thought-provoking reviews written by subject matter experts covering all aspects of adhesion science and adhesive technology. Each review will be imbued with the author’s experience so that the reader will be able to assimilate the research in the area discussed easily and will be able to apply it in practice.The journal has relevance to a myriad of industries including textiles, printing, coatings, aerospace, medical, nanotechnology, biotechnology, building and construction, and microelectronics. The topics to be covered include, but not limited to, basic and theoretical aspects of adhesion; modeling of adhesion phenomena; mecha¬nisms of adhesion; surface and interfacial analysis and characterization; unraveling of events at interfaces; characterization of interphases; adhesion of thin films and coatings; adhesion aspects in reinforced composites; formation, characterization and durability of adhesive joints; surface preparation methods; polymer surface modification; biological adhesion; particle adhesion; adhesion of metallized plastics; adhesion of diamond-like films; adhesion pro¬moters; contact angle, wettability· and adhesion; superhydrophobicity and superhydrophilicity. With regard to adhesives, RAA will include, but not limited to, green adhesives; novel and high-performance adhesives; and medical adhesive applications.