The principle of choosing an adhesive: Printing Fabric,Custom Fabric Printing,Single Jersey Fabric,Knit Print Fabric Shaoxing Ruby Textile Co., Ltd , https://www.sxrubytex.com
1. Consider the type, size and hardness of the bonding material;
2. Consider the shape and structure of the bonding material and the process conditions;
3. Consider the load and form (tension, shear force, peeling force, etc.) of the bonded part;
4, consider the special requirements of materials such as electrical and thermal resistance to high temperature and low temperature.
The properties of the adhesive joint material:
1. Metal: After the surface treatment of the oxide film on the metal surface, it is easy to bond; because the two-phase linear expansion coefficient of the adhesive bonding metal is too different, the adhesive layer is prone to internal stress; in addition, the metal bonding site is easy to produce due to water action. Electrochemical corrosion.
2. Rubber: The greater the polarity of the rubber, the better the bonding effect. Among them, nitrile butadiene rubber has high polarity and strong bonding strength; natural rubber, silicone rubber and butyl rubber have low polarity and weak adhesion. In addition, the rubber surface often has a release agent or other free auxiliaries, which hinders the bonding effect.
3, wood: is a porous material, easy to absorb moisture, causing dimensional changes, which may result in stress concentration. In addition, the polished material has better bonding properties than the rough surface wood.
4. Plastic: The plastic with high polarity has good bonding performance.
5, glass: the surface of the glass from the microscopic angle is composed of a number of evenly uneven parts. Use a good wettability adhesive to prevent the presence of bubbles in the unevenness. In addition, the glass is based on si-o-. The surface layer is easy to adsorb water. Due to the strong polarity of the glass, the polar adhesive is easy to hydrogen bond with the surface to form a strong bond. The glass is brittle and transparent, and these should be considered when selecting the adhesive.
Adhesive features and options:
1. Connecting materials with different elastic modulus and thickness, especially thin materials;
2. The bonding surface is smooth and the aerodynamics are good;
3. Good sealing performance and good corrosion performance;
4. Extend the service life of the glue parts and reduce the weight of the glue parts;
5. Low labor intensity, low cost and high production efficiency;
6, non-conductive rubber heat-resistant seismic insulation
December 29, 2020