Minimum Order Quantity (MOQ): New Bulk Bags – 2,000 bags | Used Bulk Bags – 1 pallet minimum
Here’s a problem that can quietly eat into a plastic recycling company’s profits: your regrind might be worth thousands of dollars per truckload, but the wrong bulk bag can turn that valuable material into spilled plastic, clogged discharge equipment, damaged packaging, and hours of unnecessary labor. And the worst part? Most of these problems aren’t caused by defective bags. They’re caused by using the wrong bag specifications for the material being handled. A bag designed for smooth, uniform pellets may perform poorly with sharp plastic flakes, lightweight shredded material, or regrind containing significant fines. Get the specifications wrong, and you’re paying for it every time that bag gets filled, moved, or emptied.
Manufacturers grind plastic scrap into smaller particles that can be reused, sold, or introduced into new production processes.
Depending on the operation, the material might be polypropylene, polyethylene, PET, ABS, PVC, or another thermoplastic.
Some regrind is clean and uniform.
Other material contains irregular flakes, sharp edges, fines, or dust.
And because these materials behave differently, they can create very different packaging problems.
A bulk bag that works perfectly for virgin polypropylene pellets might be completely unsuitable for irregular PET flakes.
A bag that holds 2,000 pounds of dense regrind might only accommodate 900 pounds of lightweight shredded material before running out of space.
And a discharge spout that works beautifully for uniform pellets might clog repeatedly when handling larger plastic chips.
That’s why bulk bag problems should be evaluated based on the actual material.
In this guide, we’ll cover the most common bulk bag problems when handling plastic regrind, what causes them, and how to prevent them.
Plastic regrind isn’t one uniform material.
Its characteristics depend on the polymer, grinding process, particle size, and handling conditions.
For example, polypropylene regrind may behave differently from polyethylene regrind.
PET flakes may have different flow characteristics from ABS chips.
And mixed plastic regrind may contain a wide range of particle sizes.
These differences affect how material fills, settles, moves, and discharges from a bulk bag.
The most common problems involve leakage, fabric damage, poor discharge, insufficient bag volume, contamination, and inefficient handling.
Fortunately, most can be reduced with better specifications and operating procedures.
| Problem | Common Cause | Practical Solution |
|---|---|---|
| Regrind leaking through fabric | Significant fines | Coated fabric or suitable liner |
| Bulk bag tearing | Sharp or abrasive particles | More durable construction |
| Discharge spout clogging | Irregular particles | Wider or alternative discharge opening |
| Bag filling before target weight | Low bulk density | Larger usable bag volume |
| Excessive bag bulging | Material distribution and bag geometry | Evaluate baffled construction |
| Liner twisting during discharge | Poor liner fit or attachment | Compatible liner design |
| Material contamination | Dirty bags or filling equipment | Improved cleanliness controls |
| Filling spout leakage | Poor equipment compatibility | Correct spout dimensions |
| Unstable pallet loads | Poor bag shape or pallet fit | Improve bag and pallet compatibility |
| Excessive dust | Fines and handling conditions | Containment and dust-control measures |
| Bag damage during handling | Sharp contact surfaces or improper lifting | Equipment inspection and handling procedures |
| Unnecessary packaging costs | Over- or under-specification | Evaluate total operating cost |
These are general troubleshooting guidelines.
The correct solution depends on the actual regrind material and operating conditions.
One of the most common problems is fine-particle leakage.
Plastic regrind may contain fines generated during grinding, conveying, or handling.
These particles can sometimes escape through openings in uncoated woven polypropylene fabric.
For facilities processing large quantities of material, even small amounts of leakage can create housekeeping problems.
Uncoated woven polypropylene fabric contains small openings between the woven tapes.
Larger particles are generally contained.
However, sufficiently small fines may escape.
Evaluate the material’s particle-size distribution.
Determine whether fines are escaping through the weave.
Consider coated fabric when additional containment is necessary.
An appropriate internal liner may also help.
However, coating or liners won’t solve leakage caused by damaged seams or improperly secured closures.
Some regrind materials contain sharp or abrasive particles.
These can increase wear during filling, storage, and discharge.
For example, irregular flakes may place additional stress on fabric surfaces.
The fabric may not be suitable for the material.
Sharp particles may rub against the bag during handling.
And improper filling or transportation may increase abrasion.
Evaluate fabric durability.
Avoid unnecessary dragging or rough handling.
Protect bags from sharp equipment surfaces.
And conduct trials with the actual regrind.
For demanding applications, stronger construction may be necessary.
However, thicker fabric alone doesn’t guarantee better performance.
The complete bag design must be suitable.
This is one of the most frustrating problems in high-volume recycling operations.
The bag fills without issue.
It gets transported to the next facility.
And then the discharge spout clogs.
Now employees are spending time trying to get material flowing.
Regrind particles may be irregular.
Large flakes may bridge over narrow openings.
Certain materials may interlock.
And the discharge spout may simply be too small.
Evaluate particle size and shape.
Select a discharge opening appropriate for the material.
Review the receiving equipment.
And conduct discharge trials when practical.
For difficult-flowing regrind, alternative discharge configurations may be necessary.
Never reach beneath or into an unsupported suspended bag to clear a blockage.
Here’s a common purchasing mistake.
A facility orders a bag rated for 2,000 pounds.
Then discovers it can only fit 1,200 pounds of its regrind.
The bag isn’t necessarily defective.
The material may simply have a low bulk density.
Bulk density determines how much material fits inside a given volume.
Lightweight flakes can occupy substantial space.
Suppose the regrind has a measured bulk density of 20 pounds per cubic foot.
And the bag provides 60 cubic feet of usable volume.
60 × 20 = 1,200 pounds.
Even if the bag has a 2,000-pound safe working load, its usable volume limits the fill weight.
Measure the material’s bulk density.
Calculate the required usable volume.
And verify the bag’s actual filled capacity through trials.
Bulk bags can bulge as they’re filled.
Some bulging is normal.
However, excessive bulging may create storage and transportation problems.
The material pushes against the fabric.
The bag’s geometry affects its filled shape.
And uneven filling may contribute to inconsistent dimensions.
Evaluate the bag’s dimensions.
Confirm that the material is distributed appropriately.
Consider baffled construction when improved shape retention is necessary.
However, baffled bags aren’t always ideal for irregular regrind.
Their internal panels may affect material movement.
Internal liners can provide additional containment.
However, poorly specified liners may create problems.
A loose liner may twist during filling.
It may fold as the bag empties.
Or it may interfere with the discharge opening.
Select a liner compatible with the bag and equipment.
Evaluate attachment methods.
Use appropriate filling procedures.
And conduct discharge trials.
For many standard regrind applications, a liner may not be necessary.
Avoid adding one unless it provides a clear benefit.
Contamination can create expensive problems.
Foreign material may interfere with downstream processing.
And certain customers have strict cleanliness requirements.
Dirty bulk bags.
Residues from previous contents.
Contaminated filling equipment.
Improper warehouse storage.
And damaged or unsecured closures.
Establish cleanliness requirements.
Use suitable new bags when necessary.
Inspect packaging before filling.
Keep equipment clean.
And secure closures properly.
For contamination-sensitive regrind, an internal liner may provide additional protection.
However, it doesn’t replace proper cleanliness procedures.
Filling spouts help control material entering the bag.
However, poor equipment compatibility can create leakage.
The spout may not fit the filling equipment.
The connection may not be secured.
Or the material may flow faster than the system can handle.
Match spout dimensions to the filling equipment.
Verify closure compatibility.
Review filling rates.
And conduct filling trials.
For automated operations, consistent spout dimensions are especially important.
Poorly shaped or improperly positioned bags can create handling problems.
The filled bag may overhang the pallet.
The load may shift.
Or the bag may not remain stable during transportation.
Select appropriate bag dimensions.
Use suitable pallets.
Prevent excessive overhang.
And secure loads using appropriate transportation restraints.
Do not assume that a heavy-duty bag is automatically suitable for stacking.
Stacking suitability depends on the bag design and operating conditions.
Some regrind contains significant fines.
These particles may become airborne during handling.
For certain facilities, this creates housekeeping and occupational exposure concerns.
Evaluate dust generation.
Use appropriate containment.
Consider coated fabric or liners when suitable.
Review filling and discharge equipment.
And implement dust-control measures appropriate to the material.
Where combustible dust hazards may exist, a qualified hazard assessment is necessary.
Call or Text us at 832.400.1394
Forklift handling is a common source of packaging damage.
Forklift tines may contact the fabric.
Sharp edges may damage lifting loops.
And improper lifting can place excessive stress on the bag.
Inspect handling equipment.
Use appropriate lifting methods.
Avoid sharp contact surfaces.
Verify the bag’s safe working load.
And train employees on proper FIBC handling.
Damaged bags should be removed from service according to facility procedures.
Some regrind doesn’t discharge cleanly.
Material may remain in corners.
Irregular particles may interlock.
And certain bag designs may create areas where material accumulates.
Evaluate the material’s flow characteristics.
Select an appropriate discharge design.
Review whether internal baffles affect flow.
And conduct discharge trials.
For difficult-flowing materials, specialized discharge equipment may be necessary.
Filling efficiency affects operating costs.
A bag that doesn’t fit the equipment correctly may require unnecessary manual adjustments.
A narrow filling spout may restrict flow.
And certain materials may need additional settling time.
Match the bag to the filling equipment.
Evaluate filling spout dimensions.
Review material flow.
And verify that the bag has sufficient usable volume.
For high-volume operations, small improvements in filling time can create meaningful labor savings.
Discharge problems can slow production.
Irregular regrind may bridge.
A narrow outlet may restrict flow.
And poorly secured liners may interfere with unloading.
Evaluate the material’s particle characteristics.
Select a compatible discharge opening.
Review the receiving equipment.
And test the complete system.
For high-volume operations, reliable discharge performance should be part of the purchasing specification.
Bulk bags may be exposed to humidity, condensation, or water during storage and transportation.
Although many plastic polymers are relatively resistant to moisture, certain regrind applications may have specific moisture-control requirements.
Store bags in clean, dry conditions.
Avoid direct contact with standing water.
Protect packaging from unnecessary environmental exposure.
And evaluate whether additional barrier protection is necessary.
Coated fabric may reduce moisture movement through the weave.
However, it doesn’t automatically make the entire bag waterproof.
Woven polypropylene can degrade with prolonged ultraviolet exposure.
This can reduce packaging performance over time.
Avoid unnecessary outdoor storage.
Protect bags from direct sunlight.
Follow the manufacturer’s storage recommendations.
And evaluate UV-stabilized fabric when appropriate.
However, UV stabilization doesn’t make indefinite outdoor storage safe.
Packaging dimensions affect transportation efficiency.
A bag that’s too large may waste trailer space.
A bag that’s too small may increase the number of packages required.
And excessive bulging may reduce pallet utilization.
Evaluate filled bag dimensions.
Match bag size to the material’s bulk density.
Review pallet compatibility.
And consider baffled construction when improved shape retention provides value.
For high-volume operations, freight efficiency can be an important part of packaging economics.
Used bulk bags may provide cost savings for certain recycling applications.
However, they also introduce additional considerations.
Previous contents may leave residues.
The fabric may have experienced wear.
And lifting components may be damaged.
Verify previous contents where possible.
Inspect bags thoroughly.
Evaluate cleanliness requirements.
And confirm that the bag is suitable and authorized for the intended use.
A single-trip bag should not automatically be reused simply because it appears intact.
For contamination-sensitive applications, new bags may be preferable.
Plastic regrind handling can generate static electricity.
However, not every application requires specialized electrostatic bulk bags.
The correct classification depends on the operating environment.
Where flammable gases, vapors, or combustible dust hazards exist, electrostatic discharge can become a safety concern.
Bulk bags are commonly classified as Type A, Type B, Type C, or Type D.
Type C bags require proper grounding.
Type D bags have specialized static-dissipative characteristics and specific operating requirements.
The correct bag should be selected through a qualified hazard assessment.
This problem is less dramatic than a torn bag.
But it can be just as expensive.
Some facilities purchase coated bags when uncoated fabric would work.
Others use liners without a clear requirement.
And some buy unnecessarily heavy construction.
Evaluate the actual material.
Determine which features are necessary.
Compare total operating costs.
And avoid paying for specifications that don’t provide measurable value.
However, don’t eliminate features that protect the material or improve handling performance.
The goal is optimization—not simply buying the cheapest bag.
Small packaging problems become expensive when repeated thousands of times.
Suppose a recycling facility fills 20,000 bulk bags annually.
And suppose inefficient discharge adds three minutes of labor per bag.
That’s:
20,000 × 3 minutes = 60,000 minutes.
60,000 ÷ 60 = 1,000 labor hours.
At an illustrative labor cost of $25 per hour, that represents $25,000 annually.
These are hypothetical numbers, not industry averages.
But they demonstrate why discharge performance matters.
A better bag configuration may cost slightly more per unit while reducing total operating expenses.
When a recurring problem appears, start by identifying the actual cause.
Don’t immediately assume the bag is defective.
Ask whether the material has changed.
Review particle size and fines content.
Evaluate filling and discharge equipment.
Inspect the bag’s fabric and closures.
And determine whether handling procedures are contributing to the problem.
Then test a targeted solution.
For example, if fines are escaping through the weave, coated fabric may help.
If the discharge spout is clogging, a wider outlet may be necessary.
And if the bag fills before reaching the target weight, additional usable volume may be required.
Before ordering replacement bags, review the following:
Identify the exact plastic type.
Evaluate particle size and shape.
Measure bulk density.
Determine fines content.
Inspect fabric for damage.
Check seams and closures.
Verify filling spout compatibility.
Evaluate discharge performance.
Confirm the bag’s safe working load.
Review liner fit and attachment.
Assess contamination risks.
Inspect forklift handling procedures.
Evaluate pallet stability.
Review warehouse storage conditions.
Assess electrostatic hazards where applicable.
Compare total packaging costs.
Conduct filling and discharge trials when practical.
For facilities purchasing thousands of bags, these steps can help prevent recurring packaging problems.
Call or Text us at 832.400.1394
Common causes include fines escaping through uncoated fabric, damaged seams, loose closures, and improper handling.
Sharp or abrasive particles may increase fabric wear.
Improper handling and unsuitable construction can also contribute.
Irregular particles may bridge over narrow openings.
The discharge configuration should match the material’s flow characteristics.
The material may have a low bulk density.
The bag may reach its usable volume limit before reaching its safe working load.
Coated fabric can reduce leakage through the weave.
However, it doesn’t prevent leakage from damaged seams or poorly secured closures.
Not always.
Liners may be useful when additional contamination protection or fines containment is required.
They may be suitable for certain applications when their condition, previous contents, and intended use have been properly evaluated.
Use suitable packaging, maintain clean filling equipment, inspect bags, and secure closures properly.
They may improve shape retention and pallet utilization.
However, they’re not necessary for every application.
Optimize bag construction, fill weight, filling efficiency, discharge performance, and transportation compatibility.
Evaluate total packaging cost rather than unit price alone.
Plastic regrind creates unique packaging challenges.
It can contain irregular particles, sharp edges, fines, and inconsistent bulk densities.
And these characteristics affect how material fills, settles, moves, and discharges from bulk bags.
Fortunately, many recurring problems can be prevented through better specifications.
Start by understanding the actual material.
Measure bulk density.
Evaluate particle size and fines content.
Then review fabric construction, bag volume, filling and discharge configurations, liners, and handling requirements.
Don’t overlook warehouse storage and transportation.
And don’t assume that the cheapest bag will produce the lowest total packaging cost.
For purchasing managers, recycling operators, and supply chain teams, the objective is straightforward.
Select packaging that contains the material, works with existing equipment, and supports efficient handling from filling through final discharge.
Because the best bulk bag isn’t necessarily the biggest, strongest, or most expensive one.
It’s the one that prevents expensive problems before they happen.
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