Лако-красочные материалы — производство

The most notable properties of PBT are its chemical resistance and mechanical properties. It is also noted for its high stiffness and strength, low water absorption and high dimensional stability.

There are a number of different grades and types of PBT, including glass reinforced grades. It can be used for single-use medical devices but not for devices that might be subjected to repeated autoclaving as it does not have sufficient temperature resistance.

PBT polymer blends combine the properties of partially crystalline PBT with those of amorphous thermoplastics such as polycarbonate or ABS. The amorphous partner improves the impact strength and warpage behaviour, while the PBT ensures the chemical resistance of the blend.

PBT is used in the electrical lighting industry for its electrical insulation properties, dimensional stability and colour stability. It is also used in this industry for printed — circuit-board connectors and sockets, junction boxes and housings for switches and capacitors.

PBT would typically be used for car interior or exterior components rather than under­bonnet applications, including ash trays, windscreen wiper arms and door handles, or where a high-quality, weather-resistant surface is a key requirement.

In these trials [2], (Table 2.5) the cyanoacrylate with a primer showed excellent results but bonding PBT with engineering adhesives is often variable as it can depend on the

particular grade and in some applications a surface pre-treatment may be necessary. Roughening of the surface generally shows an improvement in bond strength.