Question 1

What is the difference between an FIBC and a bulk bag?

Accepted Answer

None, they're the same product. FIBC (Flexible Intermediate Bulk Container) is the formal industry and shipping term, and bulk bag is the everyday name most buyers use. Bulk sack means the same thing too. Super Sack is a registered trademark of United Bags, Inc., not a generic term, though some buyers use it informally to mean any bulk bag.

Question 2

How much weight can a bulk bag hold?

Accepted Answer

Most standard bulk bags are rated to carry between 1,000 and 4,000 pounds (roughly 500 to 2,000 kg), with 2,000 lbs being the most common size ordered. The number that actually matters is the Safe Working Load (SWL) printed on the bag, not its physical size, since two bags the same size can be rated for very different weights depending on the fabric and construction.

Question 3

Do I need a liner in my bulk bag?

Accepted Answer

It depends on what’s going inside. Fine powders like flour or cement typically need a liner because they sift through the small gaps in any woven fabric. Coarse granules and pellets usually don’t. If moisture or oxygen exposure is a concern for the product, a liner is worth it even for coarser material.

Question 4

What's the difference between a U-panel and a circular woven bulk bag?

Accepted Answer

A circular woven bag is made on a circular loom as one continuous tube of fabric, which means it has almost no vertical seams, useful for fine or powdery products where seams are a leak risk. A U-panel bag is built from one U-shaped piece of fabric plus two side panels, which costs less to produce and works fine for general-purpose material.

Question 5

Can a bulk bag be reused?

Accepted Answer

Standard bags carry a 5:1 safety factor and are built and tested for a single use. Multi-trip bags carry a 6:1 safety factor and are specifically designed, tested, and rated for reuse, with inspection required between trips. Reusing a standard 5:1 bag for a second load is not a recommended practice, since the bag was never tested or rated for it.

Question 6

How long can a bulk bag sit in storage before it's filled?

Accepted Answer

Standard woven polypropylene holds up fine for normal short-term storage, but plastic degrades under UV exposure over time. If bags will sit outside in direct sun for more than a few weeks before use, ask your supplier whether the fabric is UV-stabilized, since unstabilized fabric left outdoors for months can lose strength before it’s ever filled.

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