By static type
Type D
Dissipative, no grounding
Static-dissipative fabric that bleeds charge safely into the air, with no ground connection required.
Product description
Type D fabric contains additives or engineered yarns that dissipate electrostatic charge continuously and safely into the surrounding air. It reaches the same hazard envelope as Type C, flammable powders, vapors and gases, without any grounding connection.
The reason buyers pay the premium is that it takes a human step out of the safety chain. Where a Type C bag is only as safe as the operator who grounds it, a Type D bag protects whether anyone remembers or not. In operations with many filling points, mobile equipment or high staff turnover, that is usually the whole argument.
Uses
- Flammable powders, gases and vapors
- Mobile or multiple filling points with no fixed ground
- Operations with high staff turnover, where procedure compliance varies
- Sites removing operator error from the safety case
Industries we supply this for: Chemical, Oil & Gas, Pharmaceutical, Food Service
Do not use
- Applications where the fabric surface will be contaminated in use, see the caution below
Important
Dissipative performance depends on the fabric surface. Grease, heavy dust build-up or a water film can defeat the mechanism. Where the bag surface will be contaminated in normal use, tell us. It changes the recommendation.
Configurable options
Everything below is specified per order. Nothing here is a fixed catalogue number.
| Construction | U-panel, four-panel, circular, baffle |
|---|---|
| Top | Open, duffle, flap, spout, conical spout |
| Bottom | Flat, spout, conical spout, full bottom discharge |
| Loops | Corner (four-point), cross corner, tunnel |
| Liner | Antistatic or foil where required |
| Grade | Pharmaceutical, food, non-food |
| Add-ons | Document pouch, sift-proof seams, safety bands, custom print |
Customizable options
Every option below is available on this product. They change how the bag fills, lifts and empties.
Lift loops
Corner loops
One loop sewn into each corner seam. The standard build, and the most affordable way to lift a bag.
Cross corner
Sewn into eight points across opposite corners, so the loops stand upright and the forklift operator is not fishing for four floppy straps.
Tunnel loops
A sleeve of body fabric spanning each side, corner to corner. The forks go straight through: the easiest pick where headroom is tight.
Stevedore straps
Double-layer straps across the corner loops, so the bag can be taken on one or two points instead of all four.
Double loops
Two lifting points instead of four, where that suits the load and the lift better.
Top
Spout top
A cylindrical spout sewn into the top panel. 14 in diameter by 18 in long as standard, sized to your filling head.
Spout top with flap
A spout top with a flap panel over it, tied down so the spout stays covered in transit.
Duffle top
A skirt the full width and depth of the bag, so the top opens completely and ties closed.
Flap top
A closed panel with a flap sewn along one seam, tied down over the mouth.
Open top
No panel at all. Fastest to fill where dust and weather are not a concern.
Conical spout top
A top panel that tapers up into the spout. Double spout tops are available too, specified to your filling equipment.
Bottom
Discharge spout
The standard 14 by 18 in spout, tied off. A wider spout is worth specifying for material that bridges.
Flat bottom
Closed base for product that is emptied by tipping or cutting.
Full bottom discharge
The whole base opens, for material that will not flow through a spout.
Spout protection
A flap, or a petal or iris closure, over the discharge, for when the spout must stay clean in transit.
Conical discharge spout
The base narrows into the spout, which helps product that is slow to flow empty completely. Specified to your equipment.
Add-ons
Baffles
Corner panels that hold a cube instead of a bulge: roughly 25 to 30% more volume in the same footprint, and it stacks safely.
Sift-proof seams
Filler cord sewn into the seam, for product fine enough to work through the stitching.
Document pouch
A sealed pouch for the paperwork which needs to travel with the bag.
Safety bands
A reinforcing band around the top, for added strength at the lift.
Custom print
Up to four sides, for branding and traceability on the line.
Liner
No liner
Fabric alone, where the product needs no barrier. The cleanest liner is the one you never have to specify.
Loose liner
Dropped in, not attached. Affordable insurance against fine powder finding the seams.
Glued-in liner
Bonded to the bag so it stays in place through filling and discharge, which is what a food or pharmaceutical audit expects to see.
Antistatic liner
Specify this inside a Type C or Type D bag, so the liner carries the same static classification as the fabric.
Foil liner
Designed for product that is filled hot, the foil laminate holds temperatures that would deform a polyethylene liner.
Fabric
Uncoated
Breathable, and the default build.
Coated
A thin polypropylene coat over the weave, for fine powder and moisture resistance.
Frequently Asked Questions
Does a Type D bag really need no ground?
Correct. The fabric dissipates charge into the air continuously, so there is no ground connection and no operator step. That is the entire point of the type.
Is Type D safer than Type C?
Properly grounded, Type C is safe. In practice Type D is safer in most real operations, because it does not depend on a person completing a procedure correctly every single time.
What can degrade the protection?
Surface contamination. Grease, a heavy dust film or standing water on the fabric can interfere with dissipation. Clean handling matters; if your process coats the outside of the bag, say so.
Can I use a standard liner?
Not usually. An insulating polyethylene liner can undo the fabric's work. Specify an antistatic or foil liner and we will match it to the fabric.
Related products
Type C
Conductive threads woven into an interconnected grid, terminating in a grounding tab. Must be grounded in use.
Type B
Low breakdown voltage fabric that prevents propagating brush discharges, the most energetic discharge type.
FIBC Liners
Polyethylene liners fitted inside a bulk bag for moisture and contamination protection.
Send us the load, not a part number.
Material, fill weight, how you fill and how you discharge. That is enough for us to come back with a specification.