Thermal bonding



When producing thermal bonded nonwovens variety of fibers or blends can be used, including natural fibers. Thermal bonding process uses the thermoplastic properties of certain synthetic fibers to form bonds under controlled heating. A low melt fiber or bicomponent fiber is introduced at the web formation stage to perform the binding function later in the process.

Through-air thermal bonding makes bulkier products by the overall bonding of a web containing low melting fibers. This takes place in a carefully controlled hot air stream. 

The nonwoven material can be calandered with two or more calender rolls, which are heated with oil or electrically to a defined surface temperature. As a result of the pressure between the rolls, thin and well-bonded nonwovens are formed.