Duffle Top / Flat Bottom FIBC Bags
A 1-ton bulk bag with a closeable top opening for materials that benefit from covered transport or post-fill containment.
FIBC Bulk Bags
Open Top / Flat Bottom FIBC Bags
Open top flat bottom FIBC bags are the most common starting point for buyers sourcing bulk bags for the first time - and the most frequently reordered format for operations that have already worked through their configuration requirements. The open top allows unrestricted hopper, chute, or conveyor filling. The flat bottom sits square on a pallet and stacks predictably in warehouse and transport environments.
Product Overview
About this bag configuration.
The open top / flat bottom bulk bag is a woven polypropylene FIBC designed around filling simplicity and structural stability. It has no spout at the top or bottom - the full top opening allows fast, unrestricted fill access, and the flat sewn bottom provides a stable base for forklift handling, pallet stacking, and freight. This configuration is well-suited to buyers who fill by gravity feed, conveyor drop, or overhead hopper, and who unload by cutting or tipping rather than through a controlled spout. Available in coated or uncoated woven polypropylene, with optional liner configurations, loop style choices, and print options depending on project requirements.
Typical Applications
Common uses for this bag format.
- Dry granular materials - sand, salt, mineral blends, and granulated inputs that fill cleanly and do not require barrier packaging
- Agricultural inputs - feed ingredients, grain-related materials, and dry crop inputs for seasonal volume programs
- Industrial powders - where a coated body and optional liner provide sufficient containment without requiring spout-based configuration
- Plastic regrind and recycled material - plant-to-plant or plant-to-end-user transfer of regrind, pellet blends, or recovered plastic
- Construction-related dry materials - dry mixes, packaged sands, and cementitious powders for depot or site supply chains
- Mineral and aggregate products - stone powders, mineral fillers, and bulk products where density and fill rate are primary concerns
Industries
Who typically buys this bag type.
Agriculture
Feed ingredients, dry grain inputs, seasonal bulk programs
Construction Materials
Packaged sands, dry mixes, powdered construction inputs
Minerals and Aggregates
Stone powders, mineral fillers, bulk aggregate products
Industrial Manufacturing
Plant-level input handling, regrind, dry compound transfer
Recycling
Regrind, recovered materials, processed plastic streams
Landscaping Materials
Soil blends, decorative aggregates, mulch-related products
Standard Features
What this bag includes.
- Open top fill access - full-width top opening for hopper, chute, or conveyor systems
- Flat sewn bottom - stable pallet-ready base with consistent footprint under load
- Four-loop lift design - standard cross-corner loops for forklift and crane handling
- Woven polypropylene body - coated or uncoated depending on material and handling requirements
- 1-ton class construction - SWL and safety factor confirmed at project review
- Optional liner compatibility - form-fit or loose PE liner available on request
- Optional print - single-colour or multi-panel for identification, branding, or handling instructions
Customization Options
Configure to your requirements.
- Loop style and placement - cross-corner, stevedore, or tunnel loops depending on handling equipment
- Fabric weight and weave density - confirmed against material density, fill method, and load requirements
- Coated vs. uncoated body - coating adds moisture resistance and containment for fine powders
- Liner type and configuration - PE liner options for moisture or contamination control; form-fit or loose
- Print layout - logo, product identification, handling marks, or regulatory language
- Bag dimensions - confirmed against pallet size, fill volume, and stacking height
- Food-grade or clean-fill requirements - available on request; confirmed at specification review
Specification Snapshot
Technical reference for quoting discussions.
Specifications below reflect common commercial ranges and standard options for this bag style.
| Configuration | Open top / flat bottom |
|---|---|
| Typical capacity | 500 kg to 2,000 kg |
| Safe working load (SWL) | 500 kg to 2,000 kg standard |
| Safety factor | 5:1 standard; 6:1 available on request |
| Body fabric | Woven polypropylene - coated or uncoated |
| Liner option | Available on request |
| Loop style | Cross-corner standard; alternatives available |
| Bag dimensions | 35 x 35 x 40 in to 42 x 42 x 72 in common range |
| Print options | Single-colour or multi-panel |
| Discharge method | Open base / tipping - no bottom spout |
* All FIBC bags are fully customizable for dimensions, fabric weight, loop style, liner setup, top and bottom construction, and print requirements.
Standard Variants
Most inquired configurations for this bag type.
Compare common sizes and build-specific options below, then open a variant page for full technical details and a quick inquiry form.
| Variant | Size | SWL | Build | Liner | Common Use | Action |
|---|---|---|---|---|---|---|
| 35x35x45 standard | 35 x 35 x 45 in | 1000 kg | Standard coated woven polypropylene | No | Dry granular materials, regrind, feed ingredients, and standard industrial bulk handling. | Open |
| 35x35x53 standard | 35 x 35 x 53 in | 1000 kg | Standard coated woven polypropylene | No | Lighter-density products needing more vertical fill volume at 1000 kg SWL. | Open |
| 35x35x60 standard | 35 x 35 x 60 in | 1000 kg | Standard coated woven polypropylene | No | Lower-density dry products and operations that need added vertical capacity. | Open |
| 42x42x48 heavy-duty | 42 x 42 x 48 in | 1500 kg | Heavy-duty coated woven polypropylene | Optional | Dense minerals, aggregates, and heavier industrial dry materials. | Open |
| 42x42x60 heavy-duty | 42 x 42 x 60 in | 1500 kg | Heavy-duty coated woven polypropylene | Optional | High-volume, heavier-duty dry materials needing more cubic capacity. | Open |
| 35x35x45 with liner | 35 x 35 x 45 in | 1000 kg | Coated woven polypropylene with PE liner | Yes | Fine powders, moisture-sensitive products, and cleaner-contact bulk handling. | Open |
| 35x35x45 food grade | 35 x 35 x 45 in | 1000 kg | Food-grade reviewed woven PP construction | Optional | Dry ingredient programs where food-grade suitability is part of the quote review. | Open |
| 35x35x45 UV-stabilized | 35 x 35 x 45 in | 1000 kg | UV-stabilized coated woven polypropylene | No | Outdoor or semi-outdoor storage where added UV resistance matters. | Open |
| 35x35x45 anti-sift | 35 x 35 x 45 in | 1000 kg | Anti-sift coated woven polypropylene | Optional | Fine powders and dusty dry products where seam leakage needs to be reduced. | Open |
| 35x35x45 stevedore loops | 35 x 35 x 45 in | 1000 kg | Coated woven polypropylene with stevedore lifting loop | No | Handling workflows that need a central stevedore lifting option in addition to standard loops. | Open |
| 35x35x45 tunnel loops | 35 x 35 x 45 in | 1000 kg | Coated woven polypropylene with tunnel loops | No | Forklift-focused handling programs that prefer tunnel-loop bag pickup. | Open |
Why This Format
Why choose this bag style.
The open top flat bottom format earns its position as the most commonly sourced FIBC configuration because it solves the most common bulk packaging problem: moving a dry material from a fill point to a destination cleanly, efficiently, and without a complicated bag specification. There is no bottom spout to manage at fill. No discharge inlet to align with plant equipment. No added cost for features the application does not require. For buyers filling by gravity, conveyor, or hopper - and unloading by tipping, cutting, or crane lift - this bag removes unnecessary variables from the procurement and operations conversation. It is also the most transferable format: when suppliers change, dimensions can be matched; when plant equipment changes, the bag format is rarely the constraint.
Request a QuoteRelated Bag Types
Compare nearby configurations.
These formats are worth reviewing if your application has requirements this configuration does not fully address.
Full Open Top / Flat Bottom FIBC Bags with Liner
Maximum top fill access with built-in liner compatibility - for materials that need a barrier layer and a wide-mouth loading format.
Spout Top / Spout Bottom FIBC Bags
A controlled-fill and controlled-discharge bulk bag format for operations where material containment and measured emptying are process requirements.
Product FAQ
Questions that come up during specification review.
What materials work best in open top flat bottom FIBC bags?
Open top flat bottom bags are suited to dry, free-flowing materials including granulated inputs, mineral powders, sands, agricultural feed ingredients, plastic regrind, and industrial dry compounds. The material should not require a controlled discharge outlet. Wet, corrosive, or extremely fine materials may need a coated body or liner - both are available on request.
What safe working load is available for open top flat bottom bags?
Safe working load and safety factor are confirmed at project review based on your material density, handling method, and order requirements. Standard 1-ton class bulk bags are the most common format. Exact SWL targets and safety factors are not assumed from a standard range - they are finalized before production.
What lifting loop options are available?
Cross-corner loops are standard. Stevedore loops and tunnel loops are available depending on your forklift or crane handling setup. Loop placement, length, and attachment method are confirmed during specification review.
When should I choose open top over a duffle top bag?
If your material does not need to be closed or covered after filling - and your filling system works with an unobstructed top - the open top format is simpler and removes unnecessary hardware from the specification. The duffle top adds value when post-fill closure, dust containment, or covered transport is a process requirement.
Do you offer liner options?
Liner options can be discussed during the RFQ process when the application, material characteristics, and handling requirements call for additional containment or barrier support.
How do I request a quote?
Use the RFQ form to provide company details, product interest, estimated quantity, bag dimensions, fill material, delivery destination, and timeline. That structure helps qualify requests and speeds up next-step conversations.
Do you supply customers across Canada?
XTRX is positioned as a Canada-wide supply partner for qualified buyers. Coverage messaging is national, with support for quote discussions involving Ontario, Quebec, Alberta, British Columbia, and other provinces.
Ready for a Quote?
Share your dimensions, material, and estimated volume.
The RFQ form is designed to capture the details procurement and operations teams usually want to align on early. The faster you provide them, the faster the quote conversation moves.