Starch, flour and corn powder are the hardest powders to keep inside a bag: fine enough to pass a normal weave, heavy enough to hang in the seams after a month at sea. This build pairs high-density PP fabric with a food-grade PE liner so the liner carries the product and the bag carries the load.
The table below is the configuration we ship most often to starch and flour producers. Anything in it can be changed — the point is that you can compare it line by line with another supplier's offer.
| Parameter | Typical value | Note |
|---|---|---|
| Product Name | Starch FIBC Bulk Bag | Type A jumbo bag special for starch |
| Bag Construction | Circular (tubular) | Seam-free body reduces leak paths |
| Material | 100% virgin high-density PP | No recycled content in food-contact builds |
| Dimensions | 900 × 900 × 1100 mm | Other sizes to fit your pallet |
| SWL | 1000 kg | 500–1200 kg on request |
| Safety Factor | 5:1 | 6:1 for repeat lifting or rail transport |
| Top Options | Open top / filling spout + tie | Spout reduces dust at the fill point |
| Bottom Options | Flat / discharge spout | Spout for controlled emptying |
| Lifting Loops | 4 corner loops | Cross-corner for low headroom |
| Fabric Weight | 90–110 g/m² (body) | Higher for humid or long-sea-freight routes |
| Coating / Lamination | Optional | Adds a second barrier behind the liner |
| Inner Liner | Food-grade PE 0.06–0.08 mm | Loose or form-fit, taped or sewn in |
| Printing | 1–4 colours, food-grade ink | Kept out of the direct-contact zone |
| Colour | White (standard) | Custom colours from 2,000 pcs |
| Electrostatic Type | Type A | Type B for combustible dust; see Type B |
| Stitching | Double chain stitch + filler cord | Dust-proof seam is the default here |
| Packaging | Bale 5 pcs / 10 pcs or pallet | Wrapped to keep the liner clean |
| Compliance | Food-contact · EU 10/2011 · GB 4806 | Migration report on request |
Starch plants differ more than they look: pneumatic fill vs gravity fill, silo discharge vs tipping, dry climate vs monsoon. These are the fields we set per order.
Food-grade, odour-free. Thicker film for humid destinations and long transit.
Filler cord in the seam plus taped closure — the usual fix for powder bleeding at the bottom seam.
Ø350–500 mm spout with tie cord for pneumatic or gravity filling.
Ø300–400 mm for controlled emptying into a hopper or mixer.
Same bag, low-breakdown-voltage fabric, if your fill area is a classified dust zone.
Higher gsm on the body and base for 1200 kg loads.
Food-grade ink, batch and lot marking for traceability.
Clear pocket for the batch certificate; UV treatment for outdoor storage.
Most complaints on starch bags are not about strength — they are about powder escaping, moisture getting in, and the bag going soft in a stack.
The same 900×900×1100 body is used across the grain-powder family; the liner and seam change with the material.
Corn, wheat, potato and cassava starch; wheat and rice flour.
Ground grain, bran, feed premixes — higher gsm where abrasion is heavy.
Baled 5 or 10 per unit, or palletised for automated depalletising lines.
What you choose here decides how fast the line runs and how much dust the operator breathes.
Selected steps from our woven-PP line. For the full process, see the factory page.
High-density PP tape woven on circular looms.
Optional coating for a second moisture barrier.
Cut to 900×900×1100; food-grade ink.
Dust-proof seam, PE liner inserted and fixed.
Weight, size, seam and liner check; baled clean.
ZONGYE runs weaving, lamination, cutting, sewing and liner insertion under one roof in Luannan County, Tangshan, Hebei, China. That matters on food-grade work: the liner is inserted and the bag is baled in the same controlled area instead of travelling between subcontractors.
See factory & capacity
Our ISO 9001 / 14001 / 45001 system covers the factory. Food-contact documents are issued per product and per order — we do not present a general certificate as proof that every bag passed a migration test.
Material, bag size, SWL, monthly volume and destination port.
Liner, seam, spout, static type, printing and documents confirmed in writing.
3–5 days for a standard sample; 7–10 days with custom print.
15–25 days standard; FOB Tianjin, CIF or DDP.
500 pcs (standard)
Custom 1,000–2,000 pcs; trial orders special-approved.3–5 working days
Standard sample free (freight collect); custom 7–10 days. Test report on request.15–25 days (standard)
Custom 20–35 days from order confirmation & deposit.FOB Tianjin / CIF / DDP
T/T 30% + 70% before shipment or against B/L copy; L/C at sight with guarantee; Sinosure accepted.Send the bag size, load, filling method and destination. We will come back with a spec sheet and a price within 24 hours.
