Knowledge of adhesive terminology

Adhesive is a substance that can bind two surfaces of objects together through chemical or physical interactions. It has a wide range of applications in industry, construction, and daily life. However, there are many types of adhesives, each with its unique characteristics, so it is necessary to understand and apply some professional terms and concepts. The following are some key terms and their explanations about adhesives: viscosity: refers to the property of a liquid that resists flow, usually expressed in Pa · s units. The higher the viscosity, the thicker the liquid, and the poorer its fluidity; On the contrary, the better the liquidity. For glue, a suitable viscosity helps to apply evenly and prevent dripping. Shear Strength: The amount of stress required to separate the coating from the substrate by applying a force perpendicular to the coating plane. Higher shear strength means that the adhesive is more difficult to tear. Peel Strength: The force required to separate two materials in a straight line. It depends on the type of material, the size of the bonding area, and the speed of peeling. Impact Resistance: describes the ability of a glue to resist sudden external forces. If the adhesive has good impact resistance, it is not easy to peel off or crack even under heavy impact. Heat resistance: refers to the ability of a glue to maintain its characteristics and strength at high temperatures. This is particularly important for products that need to work under extreme temperature conditions. Curing Time: The period from the beginning of application to complete curing. Different types of adhesives have different curing times, ranging from a few seconds to a few days. Open Time: refers to the time allowed to adjust the position after coating without affecting the final adhesion. During this period, the glue remains in a liquid state and can be corrected. Dry to Touch Time: This refers to the point at which the adhesive becomes non stick to the hand, but it does not necessarily mean that it has completely cured. Compatibility: Ensure that the adhesive and the material to be bonded do not experience adverse reactions such as corrosion or degradation. Choosing the appropriate glue is crucial for extending the service life of the product. Environmental stability: refers to the ability of a glue to maintain its performance in various environments, including humidity, dryness, UV radiation, and other conditions. Transparency: For applications that require visibility, such as optical components or decorations, the transparency of the adhesive is an important consideration. Tunability: Some new adhesives can be customized according to specific needs to optimize their performance, such as increasing toughness, changing color, or improving wear resistance. These are just a small part of the many professional terms in the field of adhesives. With the development of technology and the continuous emergence of new materials, the vocabulary in this field is also constantly being updated and expanded. Therefore, whether as an engineer, manufacturer, or consumer, it is necessary to understand and master these basic professional knowledge.