How to Specify PP Non Woven Fabric for Converting
Buying spunbond polypropylene fabric in bulk comes down to four specifications: gsm, width, surface quality, and treatments. Get these right and the fabric runs through ultrasonic sealing, printing, and pleating without adjustment; get them wrong and the cost shows up as downtime, scrap, and ink waste.
One Base Material, Many Functions
Base polypropylene is naturally water-repellent, which makes it the standard barrier material for medical isolation gowns and protective covers. The same base fabric can be modified during extrusion: anti-static additives serve electronics packaging, UV stabilizers extend outdoor life for agricultural shade fabric, and masterbatch color goes in at the same stage for consistent dyeing. Because the additives go into the melt, they do not wash or wear off.
Fabric Weight Sets Strength, Drape, and Converting Behavior
Bulk orders are usually quoted across these gsm bands:
| Fabric Weight | Characteristics | Recommended Use |
| 10–30 gsm | Very light, porous, easy to pleat | Medical mask layers, light frost covers |
| 40–70 gsm | Balanced strength and foldability | T-shirt bags, automated packaging |
| 80–150 gsm | Stiff drape, maximum tear resistance | Heavy retail totes, furniture backing, mattress pocketing |
What to Verify Before Ordering
Ask for three numbers, not marketing claims: MD/CD tensile values, thickness deviation across the roll, and surface tension figures for ink adhesion. A fabric roll that passes all three will weld, print, and fold without tuning your line. We provide per-batch test data and slit rolls to exact width, which removes the trimming step and reduces roll-changeover downtime on your equipment.