Non-woven fabric is a textile made by bonding fibres or filaments directly into a sheet, without spinning yarn and without weaving or knitting. The bond is formed thermally, chemically or mechanically, and the choice of method determines the strength, feel and price of the fabric. Most non-wovens bought from India are polypropylene or polyester, because both polymers are produced locally and run well on the common lines.
The attraction for a buyer is speed and cost. A non-woven line converts resin or staple fibre into finished fabric in one continuous pass, so the fabric is usually cheaper per square metre than a woven of the same weight, and it can be made in very light weights that a loom cannot manage.
The three bonding routes
- Thermal bonding: heated calender rolls press the web and melt the fibres together at the contact points. This is the route used for spunbond polypropylene, and it leaves a visible dot or pattern on the fabric.
- Chemical bonding: a binder, typically an acrylic or latex emulsion, is sprayed or saturated into the web and then dried. The result is usually a stiffer, paper-like fabric used in interlinings, wipes and some filtration media.
- Mechanical bonding: barbed needles or fine water jets entangle the fibres so they hold together without heat or binder. Needle-punching is the common form for heavy fabrics such as geotextiles and felts, and spunlace or hydroentangling gives soft fabrics for wipes and medical use.
Filament or staple
The web itself is formed in one of two ways. Spunbond and meltblown lines extrude continuous filaments straight from molten polymer and lay them on a belt, so the raw material is resin granules. Carded or airlaid lines start with staple fibre, which is polyester or polypropylene cut to a few centimetres, opened and combed into a web before bonding. Filament processes are faster and give more uniform fabric, while staple processes allow blends, recycled content and much higher weights.
What to specify when buying
GSM, or grams per square metre, is the first number in any non-woven enquiry, and the tolerance matters as much as the nominal figure, since lines drift and a plant that runs slightly light saves resin on every roll. Width, roll length, core size, colour, UV stabilisation and any treatment such as a hydrophilic or antistatic finish should all be in writing. For hygiene or medical uses, ask for the polymer grade and whether the plant runs food-contact or medical-grade resin.
A sealed sample tested at an independent lab for GSM, tensile strength and elongation gives a baseline the bulk can be checked against. Without that baseline, a disagreement about quality becomes an argument about opinion, and the buyer is usually the one who loses it.
How we help
We visit non-woven plants in and around Ahmedabad and Surat, audit the ones that match your product, and send sealed samples to an NABL-accredited lab so the baseline is independent. Before shipment we inspect the rolls, supervise loading and send you a weekly update, with one approved supplier and one backup. A free 20-minute sourcing review is the easiest way to start.