How to Prevent Strapping Damage on Cartons and Products
Strapping is commonly used to secure cartons, industrial products and palletised loads during storage and transportation.
It helps keep products together, reduce load movement and improve shipment stability.
However, strapping can also damage cartons and products when excessive pressure is concentrated on a small area.
Common problems include crushed carton corners, torn packaging, strap marks, scratched product surfaces and deformed edges.
Using the correct strapping method together with suitable edge protection can help businesses secure their shipments without damaging the products.
What Is Packaging Strapping?
Packaging strapping is a material wrapped around cartons, products or palletised loads to hold them securely together.
Strapping is commonly used for:
* Closing heavy cartons
* Securing palletised goods
* Bundling multiple products
* Preventing load movement
* Stabilising stacked cartons
* Securing industrial components
* Supporting export shipments
* Holding protective packaging in place
Different types of strapping may be used depending on the product weight, handling conditions and transportation requirements.
What Types of Strapping Are Used in Packaging?
Common packaging strapping materials include:
Polypropylene Strapping
Polypropylene strapping is lightweight and commonly used for cartons, bundles and lighter pallet loads.
It is suitable for applications that do not require extremely high tension.
Polyester Strapping
Polyester strapping provides higher strength and can maintain tension during transportation.
It is commonly used for heavier loads and industrial products.
Steel Strapping
Steel strapping is used for heavy-duty applications such as metal products, construction materials and industrial equipment.
It provides high tension but may cause serious product damage if suitable protection is not used.
Paper Strapping
Paper strapping may be used for selected packaging applications where a paper-based solution is preferred.
The correct strapping type should be selected according to load weight, product material and transportation conditions.
Why Does Strapping Damage Cartons?
Strapping creates tension around the shipment.
This tension is necessary to hold the products securely, but it also creates pressure on the areas where the strap contacts the packaging.
Carton corners and edges are especially vulnerable because the strap pressure is concentrated along a narrow line.
Strapping damage may occur because of:
* Excessive strap tension
* Weak carton materials
* Sharp product edges
* Incorrect strap positioning
* Movement during transportation
* Lack of corner protection
* Uneven load surfaces
* Moisture-weakened cartons
* Incorrect strapping material
* Poor weight distribution
When a carton corner becomes crushed, the strap may become loose and the entire load may lose stability.
Common Types of Strapping Damage
Crushed Carton Corners
Tight strapping can compress carton corners and weaken the overall structure of the box.
This may reduce stacking strength and cause the cartons to collapse.
Torn Outer Packaging
Straps may cut into corrugated cartons, wrapping or protective films.
Once the outer packaging is torn, the product becomes more exposed to dust, moisture and impact.
Product Surface Marks
Strapping placed directly against a product may leave marks, scratches or dents.
This is common for furniture, metal panels, doors, machinery components and finished products.
Deformed Product Edges
Products with soft or sensitive edges may become permanently deformed under strapping pressure.
Loose Strapping
When carton corners collapse, the strap loses tension.
This can allow products to shift or separate during transportation.
Broken Strapping
Strapping may break when it experiences excessive tension, sharp edges or repeated movement.
A broken strap may cause the entire shipment to become unstable.
How to Prevent Strapping Damage
1. Use Edgeboards Under the Straps
Edgeboards can be placed between the strapping and the carton or product.
They help distribute the strapping pressure across a wider area instead of concentrating it on one narrow edge.
Edgeboards can help:
* Protect carton corners
* Reduce strap marks
* Prevent cartons from being crushed
* Protect product surfaces
* Maintain strap tension
* Improve load stability
* Keep stacked cartons aligned
Vertical edgeboards may be placed along the full height of a palletised load.
Horizontal edgeboards may also be used along the top or bottom edges, depending on the packaging design.
2. Use the Correct Strap Tension
Strapping should be tight enough to secure the shipment but not so tight that it damages the packaging.
Excessive tension does not always create a safer load.
It may instead:
* Crush cartons
* Bend products
* Break packaging materials
* Damage corners
* Cause straps to snap
* Reduce load stability
The required tension should be based on the product weight, strapping material and load design.
3. Select the Correct Strapping Material
Different products require different levels of strapping strength.
A lightweight carton may not require heavy steel strapping.
Using strapping that is too strong may create unnecessary pressure on the packaging.
Businesses should consider:
* Product weight
* Carton strength
* Transportation distance
* Load height
* Product sensitivity
* Storage duration
* Handling frequency
* Environmental conditions
The strapping material should secure the load without creating excessive pressure.
4. Position Straps Correctly
Straps should be positioned over strong and supported areas of the packaging.
Avoid placing straps directly over:
* Unsupported carton sections
* Protruding product parts
* Fragile components
* Open carton gaps
* Soft product surfaces
* Sharp product edges
Internal supports may be required beneath the strapping position to prevent the packaging from collapsing.
5. Strengthen Carton Corners
Carton corners provide much of the vertical strength of a box.
Weak corners are more likely to collapse under strapping and stacking pressure.
Corner strength can be improved using:
* Edgeboards
* Paper profiles
* Reinforced carton designs
* Internal corner supports
* Honeycomb board
* Customised inserts
Stronger corners help the carton maintain its shape and keep the strapping secure.
6. Avoid Strapping Directly Against Products
Strapping should not be placed directly against sensitive product surfaces.
A protective layer should be placed between the strap and the product.
Suitable protective materials may include:
* Edgeboards
* Flatboards
* Paper pads
* Honeycomb board
* Protective profiles
* Corrugated sheets
* Customised paper components
This creates a barrier that reduces scratching, denting and concentrated pressure.
7. Protect Sharp Product Edges
Sharp metal or plastic edges can cut through strapping during transportation.
They may also cause the strap to weaken over time.
Protective profiles should be placed over sharp edges before the shipment is strapped.
This helps protect both the product and the strapping material.
8. Use a Stable Load Base
A damaged or uneven pallet may cause the shipment to move after strapping.
The load base should be:
* Strong enough for the product weight
* Flat and stable
* Suitable for forklift handling
* Free from major damage
* Compatible with the carton dimensions
Depending on the application, businesses may use wooden pallets, plastic pallets, paper pallets or slip sheets.
The load should remain within the dimensions of the pallet or load platform.
9. Stack Cartons Evenly
Uneven stacking creates gaps and pressure points.
When strapping is tightened around an uneven load, certain cartons may receive more pressure than others.
Cartons should be:
* Arranged in a consistent pattern
* Positioned within the pallet dimensions
* Stacked with heavier cartons at the bottom
* Kept close together
* Supported at the corners
* Aligned vertically
A consistent load shape makes strapping more effective and reduces packaging damage.
10. Combine Strapping with Stretch Film
Strapping and stretch film serve different purposes.
Strapping provides strong load restraint, while stretch film helps hold cartons together and protect the outer surface.
For some loads, combining both materials can improve stability.
A complete system may include:
* Vertical edgeboards
* Horizontal edgeboards
* Stretch film
* Strapping
* Anti-slip sheets
* Top protection
* A suitable pallet or slip sheet
Businesses should avoid relying on excessive strapping when the actual problem is poor stacking or weak packaging.
How Do Edgeboards Protect Cartons from Strapping?
Edgeboards are paper-based profiles designed to protect corners and edges.
When placed beneath strapping, they create a larger contact surface.
Instead of the strap pressing directly into one narrow carton edge, the pressure is distributed along the edgeboard.
This can help reduce:
* Crushed corners
* Strap cuts
* Torn cartons
* Deformed packaging
* Loose strapping
* Damaged product edges
Edgeboards also help create straighter and more consistent corners around the shipment.
This can improve wrapping, stacking and overall load appearance.
Where Should Edgeboards Be Placed?
Vertical Placement
Vertical edgeboards are installed along the upright corners of a palletised load.
They can help:
* Protect multiple carton layers
* Improve vertical alignment
* Distribute strapping pressure
* Support stacking
* Stabilise tall loads
Horizontal Placement
Horizontal edgeboards can be placed across the top or bottom edges of the shipment.
They may help protect areas where horizontal straps are applied.
Individual Product Protection
Shorter edgeboard sections can be used to protect individual products, boxes or bundles.
This may be suitable for:
* Furniture panels
* Metal sheets
* Doors
* Automotive components
* Building materials
* Machinery parts
* Flat-packed products
The edgeboard length and strength should match the product dimensions and strapping tension.
How to Choose the Correct Edgeboard
The correct edgeboard specification depends on the application.
Businesses should consider:
Product Weight
Heavier products may require thicker and stronger edgeboards.
Strap Tension
Higher strap tension creates greater pressure on the packaging corners.
Edgeboard Length
The edgeboard should cover the areas that require protection.
For palletised cartons, the edgeboard may need to extend across the full height of the load.
Leg Width
Wider edgeboard legs provide a larger surface for distributing pressure.
Thickness
The edgeboard must be strong enough to resist compression and bending.
Product Shape
Irregular products may require customised profiles or special shapes.
Transportation Conditions
Long-distance and export shipments may require stronger protection because of repeated handling and vibration.
Can Edgeboards Improve Load Stability?
Edgeboards can support load stability by keeping cartons aligned and creating a more consistent outer structure.
When used together with stretch film or strapping, they can help the individual cartons behave as one combined load.
This may reduce:
* Carton movement
* Load leaning
* Misaligned stacks
* Loose strapping
* Collapsed corners
* Load separation
However, edgeboards should be part of a complete packaging system.
Businesses must also consider the load base, carton strength, stacking pattern and internal product protection.
How to Prevent Strapping Damage on Metal Products
Metal products often require strong strapping because of their weight.
However, metal surfaces may be scratched, dented or marked by direct strap contact.
To prevent damage:
* Place paper profiles under the straps
* Protect sharp metal edges
* Separate individual components
* Use moisture protection when required
* Select suitable strapping tension
* Stabilise the product on a strong load base
* Avoid metal-to-metal contact
* Use internal blocks to prevent movement
Finished or painted metal surfaces may require additional surface protection.
How to Protect Furniture and Panels from Strapping
Furniture, doors and flat panels often have long exposed edges.
Direct strapping can cause:
* Dented corners
* Surface marks
* Broken edges
* Crushed packaging
* Scratched finishes
Edgeboards or customised protective profiles can be placed along the full edge of the product.
Flatboard or honeycomb board may also be used to protect wider surfaces.
The straps should be positioned over the protected areas.
How to Protect Cartons During Export Shipping
Export shipments may remain strapped for long periods.
Changes in humidity, stacking pressure and transportation movement can affect carton strength.
To protect strapped export cartons:
* Use cartons suitable for the product weight
* Keep packaging materials dry
* Use edgeboards beneath strapping
* Avoid excessive strap tension
* Prevent carton overhang
* Use a strong pallet or paper pallet
* Stabilise the load with stretch film
* Inspect the load before container loading
* Test the packaging before large shipments
The packaging system should remain stable throughout the entire shipping route.
Common Strapping Mistakes
Applying Too Much Tension
Excessive tension can crush cartons and damage products.
Not Using Corner Protection
Straps applied directly against corners may cut into the packaging.
Using the Wrong Strap Type
A strap that is too weak may break, while one that is too strong may damage the load.
Strapping an Unstable Load
Strapping cannot correct poor stacking or uneven weight distribution.
Placing Straps Over Empty Areas
Unsupported carton surfaces may collapse when tension is applied.
Ignoring Sharp Edges
Sharp edges can damage the straps and create a safety risk.
Using Damaged Edgeboards
Wet, bent or crushed edgeboards may not distribute pressure effectively.
Should More Straps Be Added for Better Stability?
Adding more straps does not always improve shipment stability.
Too many straps may:
* Increase packaging cost
* Damage carton surfaces
* Create additional pressure points
* Increase packing time
* Make unpacking more difficult
Businesses should first identify why the load is unstable.
The problem may be caused by:
* Poor stacking
* Weak cartons
* Uneven weight
* Empty spaces
* An unsuitable pallet
* Insufficient stretch wrapping
* Lack of corner protection
The objective is to use the correct number of straps as part of an optimised packaging system.
Frequently Asked Questions
Why does strapping crush carton corners?
Strapping crushes carton corners when excessive tension is concentrated on a small and unsupported area. Weak carton materials and the absence of edge protection can increase the damage.
How can straps be prevented from cutting into cartons?
Edgeboards or corner protectors can be placed beneath the strapping. They distribute pressure and reduce direct contact between the strap and the carton.
What is the purpose of edgeboard under strapping?
Edgeboard protects product and carton corners, distributes strap pressure and helps maintain load stability.
Can edgeboard be used with steel strapping?
Yes. Edgeboard can be used beneath steel strapping to protect the product and distribute tension. The edgeboard specification should be suitable for the required pressure.
How tight should packaging straps be?
The straps should be tight enough to secure the shipment without crushing or deforming the packaging. The correct tension depends on the product, strap type and load design.
Can strapping damage metal products?
Yes. Direct strapping may scratch, dent or mark metal surfaces. Protective paper profiles should be placed between the strap and the product.
Should stretch film and strapping be used together?
They may be used together when the load requires both strong restraint and overall load containment. The correct combination depends on the shipment.
What causes straps to become loose?
Straps may become loose when cartons collapse, products move, packaging compresses or the strap loses tension during transportation.
How can straps be prevented from breaking?
Use the correct strap type, protect sharp edges, apply appropriate tension and ensure the load does not move excessively.
Can edgeboards be customised?
Yes. Edgeboards can be produced in different lengths, thicknesses, widths and strengths to match specific products and load requirements.
Conclusion
Strapping is an effective method for securing cartons, products and palletised loads, but incorrect application can damage the shipment.
Businesses should use the correct strapping material, suitable tension and proper strap positioning.
Paper-based edgeboards and protective profiles can help distribute pressure, protect corners and reduce direct contact between the straps and the products.
When combined with strong cartons, correct stacking, a suitable load base and proper load stabilisation, edge protection can help create safer and more secure shipments.
Eltete Malaysia provides paper-based edgeboards, protective profiles and transport packaging solutions for manufacturers, exporters and logistics operations.
Contact Eltete Malaysia to discuss suitable edge protection for strapped cartons, palletised loads and industrial products.
