Spunbond, meltblown and needle-punched fabrics are the three non-woven types a buyer will meet most often from India, and they differ in how the web is formed and bonded. Spunbond extrudes continuous polypropylene filaments and thermally bonds them, meltblown blows very fine fibres for filtration, and needle-punched entangles staple fibres mechanically for heavy fabrics such as geotextiles and felts. Each suits a different job, and choosing the wrong one costs more than any price difference between them.
The names describe the process, not the polymer. Spunbond is usually polypropylene, but polyester spunbond exists for roofing and automotive use. Needle-punched fabric may be polyester, polypropylene or a blend, and the fibre choice changes the chemical and UV resistance of the finished roll.
How each one is made
Spunbond lines melt resin, extrude it through thousands of fine holes, draw the filaments with air and lay them in a random web on a moving belt. A heated calender then bonds the web at a pattern of points. The fabric is strong for its weight, uniform and fast to produce, and typical weights run from about 10 to 150 GSM. Uses include carrier bags, crop covers, furniture and mattress backing, hygiene components and disposable medical garments.
Meltblown uses hot, high-velocity air to stretch molten polymer into fibres far finer than spunbond filaments, often around a micron in diameter. The web is weak on its own but has a very fine pore structure, which is exactly what filtration needs. Meltblown is the working layer in face masks, air filters and liquid filter media, usually in low weights of roughly 15 to 50 GSM. If the material is for respiratory filtration, ask about electrostatic charging, since the charge does much of the filtering and fades with poor storage.
Needle-punched fabric starts with staple fibre that is opened, carded into a web, cross-lapped to build thickness and then passed through a bed of barbed needles that push fibres through the web and lock them together. No heat or binder is required, though some plants add a thermal pass afterwards. Weights typically run from around 100 to 800 GSM or more, and the fabric is thick, porous and drapes well. It is the standard construction for non-woven geotextiles, drainage fabrics, automotive felts, filter bags and industrial padding.
How to tell them apart
- Spunbond: smooth, thin, with a visible bond pattern of dots or diamonds; tears cleanly and is used for packaging, agriculture and hygiene.
- Meltblown: soft, slightly cloudy and very weak in the hand; used almost entirely for filtration and rarely sold on its own for other purposes.
- Needle-punched: thick and felt-like, with a fibrous surface and needle marks visible against the light; used for geotextiles, felts, filter bags and padding.
SMS and other laminates
Many products combine the types. SMS fabric is a spunbond, meltblown, spunbond sandwich, bonded in one pass, that pairs the strength of the outer layers with the barrier of the middle, and it is the usual fabric for surgical gowns and drapes. Needle-punched fabric may also be laminated to a woven scrim where a geotextile needs both high strength and good filtration. When a quotation says SMS, ask for the weight of each layer, because a thin meltblown layer gives a very different barrier from a thick one at the same total GSM.
How we help
We visit spunbond and needle-punching plants, check which lines they actually run rather than what the brochure says, and send sealed samples to an NABL-accredited lab for GSM and tensile testing. We inspect before shipment, supervise loading and keep you updated weekly, with one approved supplier and one backup. A free 20-minute sourcing review will usually settle which type you need.