How to choose adhesive?China Industrial Adhesive Wholesale
1. The principle of selecting adhesive: (1) Consider the type, properties, size, and hardness of the adhesive material; (2) Consider the shape, structure, and process conditions of the adhesive material; (3) Consider the load and form (tension, shear force, peel force, etc.) that the bonding area is subjected to; (4) Consider the special requirements of materials such as flame retardancy, waterproofing, thermal conductivity, high temperature resistance, and low temperature resistance.
How to choose adhesive?
2. Types of bonding materials: (1) Metal: After surface treatment, the oxide film on the metal surface is easy to bond; Due to the significant difference in the coefficient of expansion between the two phases of the adhesive bonding metal, the adhesive layer is prone to internal stress; In addition, the metal bonding area is prone to electrochemical corrosion due to water action.
(2) Rubber: The greater the polarity of rubber, the better the bonding effect. Among them, nitrile chloroprene rubber has high polarity and strong bonding strength; Natural rubber, silicone rubber, and isobutylene rubber have low polarity and weak adhesion. In addition, there are often release agents or other free additives on the surface of rubber, which hinder the bonding effect.
(3) Wood: It is a porous material that is prone to moisture absorption, causing dimensional changes and potentially leading to stress concentration. In addition, polished materials have better bonding performance than rough surface wood.
(4) Plastic: Polarized plastics have good bonding properties.
(5) Glass: From a microscopic perspective, the surface of glass is composed of countless uniformly uneven parts. Using a moist adhesive can prevent the possible influence of bubbles in the uneven areas. In addition, glass is mainly composed of Si-O -, and its surface layer is prone to absorb water. Due to the strong polarity of glass, polar adhesives are prone to hydrogen bonding with the surface, forming a strong bond. Glass is brittle and transparent, so when choosing an adhesive, these factors should be considered. How to choose an adhesive?
Our company is a technology-based company that mainly produces semiconductor packaging materials and electronic adhesives, optical grade and electronic grade resins. We focus on providing resin and adhesive, packaging application material products and solutions for semiconductor packaging and testing enterprises, consumer electronics enterprises, and communication equipment terminal enterprises, to solve customers’ key material domestic substitution needs in precision packaging, process protection, high-precision bonding, electrical performance protection, optical applications, etc