Spun bond

Spun bond fabrics are produced by depositing extruded, spun filaments onto a collecting belt in a uniform random manner followed by bonding the fibers. The fibers are separated during the web laying process by air jets or electrostatic charges. The collecting surface is completely perforated to prevent the air stream from deflecting and carrying the fibers in an uncontrolled manner. Bonding imparts strength and integrity to the web by applying heated rolls to partially melt the polymer and fuse the fibers together.

The Spun bond process system is based on the melt spinning technique. The melt is forced by spin pumps through special spinnerets having a large number of holes. The primary blow ducts, located below the spinneret block, continuously cool the filaments with conditioned air. The secondary blow ducts, located below the primary blow ducts, continuously supply the auxiliary room temperature air. Over the line's entire working width, ventilator-generated under pressure sucks filaments and mixed air down from the spinnerets and cooling chambers. The continuous filaments are sucked through a venture (high velocity, low pressure zone) to a distributing chamber, which affects fanning and entanglement of the filaments. Finally, the entangled filaments are deposited as a random web on a moving sieve belt.

Carded Thermo bonded

Carded thermo bonded is considered as the older technology of nonwovens processes, which is basically a mechanical process that starts with the opening of bales of fibers which are blended and conveyed to the next stage by air transport. They are then combed into a web by a carding machine, which is a rotating drum or series of drums covered in fine wires or teeth. Although many customers are shifting to the Spun bond nonwovens, still the carded thermo bonded nonwovens have some favorable coverage and softness characteristics.

High loft Acquisition Distribution Layer (ADL)

The high loft process has the same steps of the carded thermo bonded except for the final stage where the web is passed through air-through bonding ovens instead of drums. This allows the bi-com fibers to melt and bond together in lofty shape without pressing the fabric.

The ADL nonwovens are usually used as a layer between the top sheet and the absorbent core in a diaper. This sub layer is specially needed when the absorbent core is very thin, in order to quickly move liquids into the absorbent core.

Machines Technical Ranges

• Slitting range:
  60-3200 mm
• Weight Range
  11-70 gsm
• Max Roll Diameter:
  1500mm
• Core Diameter:
  3 & 6 inches
• Filament thickness:
  1.7-3.2 din