Spunbond And Meltblown Processes

Spunbond Process

Spunbond non woven fabrics continue the synthetic fiber filament spinning process to a certain extent, which combines the spinning technology of synthetic fibers with the Nonwoven Fabric forming and consolidation technology. The dried polymer is melted and pressurized by a screw extruder and then ejected from a spinneret assembly to form filaments of a certain fineness. After air cooling, a fiber web is formed on the web - forming curtain, and the fiber web is reinforced to bond the fibers into a nonwoven fabric with certain mechanical properties. Spunbond nonwovens can be used to increase the overall mechanical properties of the material and increase the service life of the material. But on the other hand, due to the problem of process conditions, the fineness of the filament cannot be very small, which makes the Spunbond Nonwoven fabric unsuitable as a filter material alone.

Meltblown process
The melt blowing method is mainly that after the screw extruder melts the polymer, then the high temperature airflow with a certain speed is used to make the melt stream stretched to form ultra - fine fibers, which are collected on the web forming curtain or web forming drum. A processing technology that forms a web of fibers and then self - bonds into a Non Woven Fabric Roll. The advantages of Meltblown Nonwoven are that the fiber diameter is small and the specific surface area is small, which is beneficial to improve the filtration efficiency.