Spunbond and spunmelt are related processes, but they are not exactly the same. The term "spunmelt" is often used to describe a combination of both the spunbond and meltblown processes in the production of nonwoven fabrics. Let's break down the differences:
Spunbond:
Process: Spunbond is a nonwoven fabric production process where continuous filaments of synthetic polymers, such as polypropylene or polyester, are extruded, laid down onto a moving conveyor belt, and then bonded together using heat and pressure.
Characteristics: Spunbond fabrics are known for their strength, durability, and breathability. They have a web-like structure with randomly laid filaments that are bonded together.
Spunmelt:
Combination: The term "spunmelt" typically refers to a process that combines both spunbond and meltblown technologies in the same production line.
Integrated Process: In a spunmelt line, the production starts with the extrusion of filaments using a spunbond process. These filaments are then combined with meltblown fibers, which are created simultaneously in the same line. The combination of the two processes results in a fabric that incorporates characteristics of both spunbond and meltblown.
Meltblown:
Process: Meltblown is another nonwoven fabric production process where polymer granules are melted, extruded through tiny nozzles, and blown by high-speed air onto a collector. The result is a fine fiber web with excellent filtration properties.
Characteristics: Meltblown fabrics are known for their fine fibers and are commonly used in applications where fine particle filtration is crucial, such as in medical face masks.
In summary, spunmelt refers to a combined process where both spunbond and meltblown technologies are integrated into a single production line. The term highlights the synergy of these processes in creating nonwoven fabrics with specific properties. The combination allows for the production of fabrics with a range of characteristics, making spunmelt fabrics suitable for various applications, including hygiene products and protective apparel.
