Hydroentanglement Bonding Process for Production of Nonwoven Fabric (Part-4)

Hydro-entanglement Bonding Process for Production of Nonwoven Fabric (Part-4)
Eng Mohamed Elsharkawy
Dept. of Textile Engineering
Alexandria University
Alexandria, Egypt
Email: m.elsharkawy.tex@gmail.com

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2.9. Characteristics of geo-textiles
There are three main properties which are required and specified for a geo-textile are its mechanical responses, filtration ability and chemical resistance. These are the properties that produce the required working effect. They are all developed from the combination of the physical form of the polymer fibers, their textile construction and the polymer chemical characteristics.

For example, the mechanical response of a geo-textile will depend upon the orientation and regularity of the fibers as well as the type of polymer from which it is made.
 geo-textile
Geo-textile
Also, the chemical resistance of a geo-textile will depend upon the size of the individual component fibers in the fabric, as well as their chemical composition – fine fibers with a large specific surface area are subject to more rapid chemical attack than coarse fibers of the same polymer. The Characteristics of Geo-textiles are broadly classified as: 
1. Physical properties:
  • Weight - thickness
  • Stiffness - density
2. Mechanical properties:
  • Tenacity - tensile strength
  • Drapability - compatibility
  • Flexibility - tearing strength
3.Hydraulic properties: 
  • Porosity - permeability - Permittivity
2.10. Features and benefits of hydro-entanglement
The hydro-entanglement process yields the most textile-like product of any of the current processes for producing nonwoven fabrics. Hydro-entanglement holds the promise of delivering a soft feel and comfort with a hand similar to those of woven and knits at the economics of nonwovens. Hydro-entangled fabrics have the following characteristics:
  • Soft, limp, flexible hand 
  • High absorbency
  • High drape 
  • High bulk
  • Comfortable and moldable 
  • Low linting
  • Stretchable without loss in thickness  
  • High strength without binders
  • De-lamination resistance
Hydro-entanglement is a highly versatile process [14] because it can be used to produce nonwovens with a broad range of end-use properties.

These differences are achieved because of a wide range of fibers that are available and because of the broad range of possible parameter adjustments.

The versatility of the hydro-entanglement processes is seen as an advantage because this process can be used to combine conventionally formed webs with melt blown, spun-bond webs, paper, other textiles and scrims in order to get a combination of properties that cannot be achieved by the use of a single web.

Spun-lace fabrics can be further finished, usually dyed and/or printed, treated with binders to allow for wash durability, or fire retardants can be applied to resist burning. The fabric can be treated by antimicrobial agents to enhance resistance against microorganisms.

Hydro-entangled non-woven, depending upon the fibers processed, are strong, soft and pliable and can be dense or open and are typically absorbent. So they are mostly used for fine fiber webs intended for the medical, personal care, baby care and consumer and hygiene markets.

CHAPTER (3)

THE AIM OF THE WORK

In this study, we aim to give an idea about one of most important methods for producing non-woven fabrics which is hydro-entanglement process.

A prototype machine will be designed and manufactured to represent the process of hydro-entanglement.

As well as, some important tests has been carried out to show the properties of textiles used in geo-textile application of non-woven which can be produced on hydro-entanglement machine.

The important properties to be investigated are; Tensile strength, puncture strength, water permeability, equivalent opening size and tearing strength.

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