Custom Type C Bulk Bags

Minimum Order Quantity (MOQ): Full Truckload
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Custom Type C Bulk Bags are for one very specific situation: when static electricity can turn your operation into a headline. If you’re filling or discharging powders, chemicals, or anything that creates static… and you’ve got flammable vapors, gases, or combustible dust anywhere in the area… you don’t “hope” it’s fine. You spec the right bag and you run a real safety process. Type C bags are built to dissipate static by grounding—but only if you actually ground them.

Here’s the straight-talk guide to Custom Type C Bulk Bags (also called conductive/groundable FIBCs): what they are, when they’re the right choice, what “grounding” really means in the real world, what to customize, and how to avoid the single dumbest mistake people make with Type C (and yes… it’s exactly what you think).

Call or Text us at 832.400.1394 for a Quote!

What Is a Type C Bulk Bag (Plain English)

A Type C FIBC is a bulk bag designed to control static electricity by providing a conductive path to ground. Most Type C bags are made from non-conductive polypropylene fabric that’s interwoven with conductive threads/yarns (often in a grid pattern), plus a grounding tab/point that connects the conductive network to earth ground.

That last part is the whole game:

Type C is only “safe” when it is properly grounded during filling and discharge.

No ground? You’re basically driving without brakes and telling everyone “it’s fine because the car is expensive.”

Why Type C Exists

When product moves inside a bag (especially powders), static charge can build up. In the wrong environment, a discharge can ignite flammable vapors, gases, or combustible dust. That’s why Type C bags are used for flammable powders and in areas where flammable atmospheres may be present—as long as they’re grounded.

Type A / B / C / D — The 30-Second “Don’t Get Fired” Version

Here’s the simplest way to think about the four FIBC electrostatic “types”:

That’s the core: Type C = groundable conductive bag.

The #1 Mistake With Type C Bags

Buying the bag… and then not grounding it every single time.

Type C bags are explicitly described as requiring grounding during filling and emptying/discharge.

So if your facility can’t reliably enforce grounding—if people “forget,” if clamps are missing, if the ground point is damaged, if nobody owns the SOP—then Type C may not be the best move for you (and you should be looking at alternatives, equipment changes, or stricter process control).

Some suppliers even spell it out bluntly: don’t use Type C when the ground connection isn’t present or becomes damaged.

What “Grounding” Actually Means in the Real World

Grounding isn’t “touching metal.”

Grounding means:

• the bag’s conductive network is electrically bonded to a grounding point/tab

• and that grounding point is connected to earth ground

• before filling/discharge starts

• and it stays connected the whole time

Practical reality: serious plants often use ground verification/monitoring systems to ensure the bag is actually connected to ground before operations begin.

If you’re doing flammable powders, this is not a “nice to have.” It’s the difference between a controlled process and “we’ll find out what happens.”

What Type C Bags Are Made Of

Most Type C designs are built from:

• woven polypropylene base fabric

• conductive threads/yarns interwoven in a connected pattern (often grid-like)

• a grounding tab/point that ties the conductive elements together and provides the connection to earth ground

In standards discussions, you’ll sometimes see resistance-to-ground targets referenced (for example, some technical guides reference very low resistance to ground for Type C). 
(We’ll keep it simple: the bag must be designed for safe charge transfer and your grounding process must be real.)

Call or Text us at 832.400.1394 for a Quote!

When Type C Bags Are the Right Choice

Type C FIBCs are commonly selected when:

• you’re handling flammable powders

• flammable vapors/gases might be present outside the bag

• combustible dust is present in the environment

• you can reliably ground the bag during filling and discharge

If your operation is disciplined and you can enforce grounding, Type C is a proven, widely used solution.

When Type C Bags Are a Bad Choice

Type C bags are a bad fit when:

• grounding can’t be guaranteed

• your team doesn’t have an SOP and training around grounding

• your equipment can’t ground consistently

• the bag’s grounding point can be ignored or damaged without anyone noticing

Because the bag doesn’t “magically” dissipate charge by itself.

It dissipates charge through the ground path.

Custom Options for Type C Bulk Bags

Now the fun part. “Type C” describes the electrostatic protection approach. You can still customize the bag around your workflow.

1) Bag size + capacity

We’ll size it around:

• your target filled weight

• your material bulk density

• your pallet footprint and stacking pattern

• how you handle bags (forklift, hoist, frames)

2) Top configuration

Choose based on your filling method:

• Fill spout (best for dust control and controlled filling)

• Duffle top (fast fill + close)

• Open top (simple, but less controlled)

3) Bottom configuration

Choose based on how you empty:

• Discharge spout (controlled emptying into hopper/process line)

• Flat bottom (dump-style discharge)

4) Liner options

If your material is:

• moisture sensitive

• very fine/dusty (sifting control)

• contamination sensitive
  …you may need a liner strategy. Just remember: liners and material behavior can affect flow and handling, so we spec it intentionally.

5) Loop style

• 4 corner loops

• cross-corner loops

• stevedore straps
  (Whatever matches your handling equipment and how your team actually moves bags.)

6) Printing

This is underrated. For Type C, many operations print BIG, obvious reminders like “GROUND BEFORE FILLING / EMPTYING” because humans are humans. (And the reminder helps prevent expensive mistakes.)

Type C vs Type D (The Decision Most Buyers Actually Face)

Type C: requires grounding, typically lower cost than Type D, excellent protection when grounded. 
Type D: designed to reduce static issues without grounding equipment (different design approach and selection criteria).

If your facility can’t guarantee grounding, that’s where the conversation usually shifts.

But if you can guarantee grounding, Type C can be a strong, cost-effective solution.

The “Badass” Checklist: Are You a Type C Facility?

Answer these honestly:

• ✅ Can every fill/discharge station connect a grounding clamp easily?

• ✅ Do you have a documented grounding SOP?

• ✅ Do operators actually follow it?

• ✅ Do you inspect ground points/clamps routinely?

• ✅ Do you prevent operation if grounding isn’t confirmed? (monitoring helps here)

• ✅ Are you willing to standardize bags so the grounding point is always where it should be?

If yes across the board, Type C is in play.

If not, you’re gambling.

The 18 Mistakes That Get Type C Programs People Into Trouble

1. “We grounded it once” thinking

2. Ground clamp is there but not actually connected to earth

3. Damaged ground point on the bag (nobody checks)

4. Operators rushing and skipping the step

5. No signage or print reminders

6. Buying Type C but not training anyone

7. Multiple bag styles floating around (inconsistent practice)

8. Letting purchasing substitute “close enough” bags

9. Choosing the wrong top/bottom for the fill/discharge station

10. Ignoring dust control and creating airborne mess

11. Ignoring moisture control and creating clumping/bridging

12. Overfilling and stressing the bag

13. Underfilling and creating unstable geometry

14. Bad palletization (leaning loads)

15. No preventive maintenance on stations

16. Not documenting traceability for safety audits

17. Treating static risk like it’s theoretical

18. Assuming “Type C” means “safe in all situations” (it means safe when grounded)

What We Need to Quote Custom Type C Bulk Bags Fast

Copy/paste this and fill the blanks:

1. Material being packed: ______

2. Target filled weight per bag: ______

3. Filling method (spout / open / duffle / equipment details): ______

4. Discharge method (spout / flat / hopper/process line details): ______

5. Environment concerns (combustible dust / flammable vapors / both): ______

6. Need liners? (moisture / dust / contamination): ______

7. Preferred pallet size + stacking goals: ______

8. Any printing needed (logo, handling, grounding warning): ______

9. Quantity cadence: Full Truckload MOQ + reorder frequency: ______

The faster you give us those details, the faster we can dial in the right spec.

Bottom Line

Custom Type C Bulk Bags are about controlled static risk—and they work by grounding a conductive network so charge doesn’t build into a dangerous discharge.

If you’ve got flammables in the environment and you can enforce grounding every time, Type C is a smart, proven solution.

If you can’t enforce grounding, don’t pretend you can. Choose a different path.

Call or Text us at 832.400.1394 for a Quote!