PP spunbonded nonwoven fabric is made using specialized nonwoven equipment that extrudes and spinstretch polypropylene fibers to create a bonded web. The process involves extruding polypropylene through spinnerets to form continuous filaments, which are then drawn, collected and bonded to form the nonwoven fabric.
PP Spunbond Nonwoven Fabric Making Machine
What is pp spunbonded?
In the spunbonded process, the molten polypropylene is extruded through the spinneret holes to form many continuous filaments. Hot air draws and stretches the filaments to diameters between 5 to 30 microns. The fine filaments are randomly deposited on the collecting belt to form a web.
The calender stack applies heat and pressure to thermally bond the points of filament intersection, giving the web adequate tensile strength and integrity. This bonded nonwoven fabric is then wound onto a core.
Spunbond nonwoven fabric machines
Spunbond nonwoven fabric making machines can produce fabrics with basis weights ranging from 5 to 150 gsm. It depends on the line speed, polymer throughput and number of spinneret holes. The properties of the PP spunbonded fabric like tensile strength, elongation and pore size are determined by factors like:
Draw ratio and air flow
Calender temperature and pressure
PP spunbonded nonwoven fabrics are widely used in applications like filtration, hygiene products, geotextiles and wipes due to their good strength, spinnability and cost effectiveness.
What Do You Need To Consider For PP Spunbonded Nonwoven?
PP stands for polypropylene, the most common polymer used for spunbonded nonwovens due to its properties and cost.
Spunbonded refers to the process of spinning continuous filaments and bonding them into a fabric. This contrasts with meltblown and needlepunching.
The continuous filaments produced by spunbonding are typically 5 to 30 microns in diameter. This is larger than meltblown fibers but provides good strength.
Compared with the ordered structure of woven or knitted fabrics, spunbond PP nonwovens have a random, entangled network structure.