Лако-красочные материалы — производство

In this range of applications, adhesives are used for fastener locking, formed-in-place gaskets, and bonding of mechanical parts. Mainly cyanoacrylates, anaerobic and encap­sulated adhesives, modified acrylates, and elastomer or resin-based compounds are applied. Examples of applications are listed in Table 1. To choose a suitable adhesive, the required strength and mechanical properties as well as the chemical conditions for the specific application should be well known. For example, for the curing of dimetha­crylates, the catalytic effect of the glued surface, the absence of oxygen, the temperature, the mold of the bond line, and the type of material to be bonded are important. Depending on the type of bonding, the requirements differ. The bond strength, temperature and aging stability, and the resistance to chemical reagents must fit the application load. The specific conditions of the joint performance have to be taken into consideration.

For adhesive bonding of plastics to plastics and plastics to metal the cyanoacrylates are usually better than anaerobic compounds, which are more suitable for metal-to-metal bonding because of their greater resistance to mechanical vibrations and impacts. Encapsulated adhesives can be used to coat the fastener by the supplier. The curing takes place after fastening and locking are done. Figure 2 shows the great variety of available coated fasteners. Formed-in-place gaskets and adhesive sealants are used in various mechanical applications to seal and bond surfaces. There are cyanoacrylates, anaerobic adhesives, and modified acrylates and solvent-based rubber or resin compounds as well as silicones. The products are applied manually or automatically on the surfaces just prior to assembly. Figure 3 shows a sealant application extruded automatically onto an oil pan flange.