PP bags for rice and PP bags for fertiliser look alike, but they are specified differently. Rice bags are judged on print, appearance and breathability. Fertiliser bags are judged on moisture protection, strength and how the contents behave in storage.
Both are woven polypropylene, so the choices that matter are size, lamination, liner and UV treatment.
What size and weight should the bag be?
Rice is commonly packed in 5, 10, 25 and 50 kg bags, and fertiliser in 25 and 50 kg. Match the bag to the filling line and the pallet pattern, not just the weight. Bag length and width decide how neatly the filled bags stack and how well they hold on a pallet.
Our guide to standard PP woven sack sizes gives the usual dimensions. State the filled weight, the cut size and the tolerance on both in the order.
Weight tolerance matters commercially. Bags that arrive slightly short in length or width may not take the stated fill, and bags that are larger waste material and slip on pallets. Ask the maker for the cut size, the stitched size and the weight per thousand bags in the quote, and check a sample from each lot against them before the container is sealed.
Do rice bags need lamination?
Lamination bonds a thin film, usually BOPP, to the woven fabric. For rice, it gives a smooth surface that carries sharp, multi-colour print, which matters when the bag is also your shelf presence. It also adds some protection against dust and moisture.
Plain unlaminated bags are cheaper to make and breathe better, but print is limited. Some rice packers use laminated bags with small ventilation holes so the grain does not sweat. Decide this with your packer before you order. For print options, see PP woven bag printing and branding.
What does fertiliser need?
Many fertilisers take up moisture from the air, and wet fertiliser cakes into lumps. For these, a polyethylene liner inside the woven bag, or a laminated bag with a sealed closure, protects the contents. Fine or dusty products may also need tighter weave to stop sifting.
Fertiliser may be stored outdoors for long periods, so UV stabilisation is important. Without it, polypropylene tape degrades in sunlight and the bag loses strength. UV stabilisation in PP woven bags explains how it is specified and tested. Some fertilisers are also regulated or classified in transport, so check with your freight forwarder and the authority in the destination.
What to put in the order
The points that most often go wrong are the ones left unwritten. Specify:
- Fabric weight in GSM, tape denier and mesh count, with a tolerance.
- Laminated or unlaminated, film type and whether the bag has a liner.
- UV treatment level, stated as the hours or exposure it must survive if you require it.
- Stitching and closure style, and the strength of the bottom seam.
- Print colours, artwork approval and shade tolerance between lots.
Next step
Ask each bag maker for a retained sample and a load test on a finished, filled bag. We shortlist and audit PP bag makers in Gujarat, check samples and have lots tested. Book a free sourcing review with your product, size and quantity.