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Packaging Solutions for Automobile Industries

6 min read · Asian Packaging Industries

Corrugated boxes are designed to protect products from the factory to the customer’s doorstep. However, one of the biggest threats to their performance is moisture. Even the strongest corrugated box can lose a significant portion of its strength if exposed to excessive humidity or water.

Industries such as pharmaceuticals, food & beverages, FMCG, chemicals, textiles, engineering, electronics, and export packaging often face challenges caused by changing weather conditions and improper storage. Understanding how moisture affects corrugated packaging helps businesses reduce product damage, improve warehouse performance, and lower logistics costs.

At Asian Packaging Industries, we manufacture corrugated packaging using high-quality kraft paper, advanced manufacturing processes, and strict quality control to ensure consistent performance even under demanding conditions.

What is Moisture in Corrugated Packaging?

Paper is made from natural cellulose fibres, which are highly absorbent. This means corrugated boards naturally absorb moisture from the surrounding environment.

Moisture can enter corrugated packaging through:

High humidity
Rain exposure
Wet warehouse floors
Condensation during transportation
Poor storage conditions
Direct water contact

When paper absorbs moisture, its fibres become weaker, reducing the overall strength of the corrugated box.

Why Moisture is a Major Concern

Moisture doesn’t simply make a box feel damp—it directly affects its structural performance.

High moisture levels can reduce:

Compression strength
Edge Crush Test (ECT) values
Bursting Strength
Box Compression Strength (BCT)
Stacking performance

As a result, products become more vulnerable to damage during transportation and storage.

How Moisture Affects Corrugated Boxes

1. Reduces Compression Strength

One of the first effects of moisture is a reduction in Box Compression Strength (BCT).

When paper fibres absorb water, they soften and lose rigidity.

This makes boxes more likely to collapse when stacked in warehouses.

2. Weakens Edge Crush Strength

Moisture also affects the Edge Crush Test (ECT).

Since stacking strength depends largely on the corrugated board’s edge strength, excessive moisture can significantly reduce a box’s ability to support vertical loads.

3. Decreases Bursting Strength

Wet paper tears much more easily than dry paper.

This lowers the paper’s bursting strength and makes the box more susceptible to punctures and impacts.

4. Causes Box Deformation

Moisture may cause:

Warping
Bowing
Swelling
Curling

These defects make boxes difficult to assemble and reduce their appearance.

5. Poor Printing Quality

Moisture affects printing by causing:

Ink smudging
Colour variation
Blurred graphics
Reduced barcode readability

For branded packaging, maintaining low moisture levels is essential for achieving consistent print quality.

6. Weakens Adhesive Bonding

Corrugated boards are bonded using starch-based adhesives.

Excessive moisture can weaken these bonds, leading to:

Delamination
Flute separation
Reduced board strength

Common Sources of Moisture

Understanding where moisture comes from helps prevent packaging failures.

High Humidity

During the monsoon season or in coastal regions, humidity levels can exceed 80%, allowing paper to absorb moisture from the air.

Rain Exposure

Improper handling during loading or unloading may expose cartons to rain.

Wet Warehouse Floors

Boxes stored directly on damp floors absorb moisture from below.

Shipping Containers

Temperature differences inside containers can create condensation, especially during international shipments.

Improper Storage

Storing corrugated boxes near water sources or in poorly ventilated areas increases moisture absorption.

Signs of Moisture Damage

Watch for these warning signs:

Soft or weak boxes
Sagging cartons
Curved or warped sheets
Loose flute bonding
Wrinkled printing
Reduced stacking performance
Musty odour
Discoloured paper

If these signs appear, the packaging should be inspected before use.

Industries Most Affected by Moisture

Some industries are particularly sensitive to moisture-related packaging failures.

Food & Beverage

Moisture can compromise packaging hygiene and product safety.

Pharmaceuticals

Medicine cartons require stable packaging throughout storage and distribution.

Electronics

Weak packaging increases the risk of product damage.

Export Packaging

Long sea voyages expose cartons to fluctuating humidity and condensation.

Chemical Industry

Many chemical products require packaging that maintains structural integrity despite environmental conditions.

How to Protect Corrugated Packaging from Moisture

Store Boxes Properly

Keep corrugated boxes:

Indoors
Away from water sources
On wooden pallets
In dry, ventilated warehouses

Avoid placing cartons directly on concrete floors.

Maintain Proper Warehouse Humidity

Ideal storage conditions include:

Relative Humidity: 45–60%
Temperature: 20–30°C

Controlled storage conditions help preserve paper strength.

Use Moisture-Resistant Kraft Paper

For demanding applications, moisture-resistant paper grades provide better durability.

These are especially useful for:

Export shipments
Refrigerated products
Coastal regions

Apply Protective Coatings

Wax, polymer, or water-resistant coatings can improve resistance to moisture in specialized applications.

Use Stretch Wrapping

Wrapping pallets with stretch film protects corrugated boxes from moisture during transportation.

Follow First-In, First-Out (FIFO)

Older cartons should be used before newer ones to minimize long-term exposure to environmental humidity.

The Role of the Cobb Test

The Cobb Test measures how much water a paper surface absorbs within a specified time.

Lower Cobb values indicate:

Better moisture resistance
Improved printability
Better packaging durability

Manufacturers often use the Cobb Test when selecting paper for humid environments.

Moisture vs Other Packaging Properties

Property	Effect of High Moisture
GSM	Little direct change
Burst Factor	Decreases
Bursting Strength	Decreases
Edge Crush Test (ECT)	Decreases significantly
Box Compression Test (BCT)	Decreases significantly
Adhesive Strength	Weakens
Print Quality	Deteriorates
Box Appearance	Warping and deformation

This illustrates why moisture control is critical for maintaining overall packaging performance.

Expert Tips from Asian Packaging Industries

Our packaging specialists recommend:

✔ Store boxes on pallets, never directly on the floor.

✔ Protect packaging from rain during transportation.

✔ Use moisture-resistant board for export shipments.

✔ Monitor warehouse humidity regularly.

✔ Perform Cobb Tests for applications exposed to moisture.

✔ Avoid excessive storage periods in humid environments.

These practices help preserve the strength and appearance of corrugated packaging.

Why Choose Asian Packaging Industries?

At Asian Packaging Industries, we understand that environmental conditions play a major role in packaging performance. That’s why every corrugated box is manufactured using carefully selected raw materials and tested to maintain consistent quality.

Our strengths include:

Family-owned packaging business with decades of experience
Six advanced manufacturing units
Annual turnover of approximately ₹107+ crore
250+ skilled workforce supported by experienced technical staff
Imported Heidelberg 5-Colour + Coater printing technology
Automatic corrugation and converting lines
In-house laboratory for Moisture Testing, Cobb Test, GSM, BF, ECT, BCT, and other quality evaluations
Customized packaging development
Reliable transportation fleet for safe and timely deliveries

Our packaging experts help customers select the right materials and specifications based on transportation routes, storage conditions, and environmental challenges.

Frequently Asked Questions

Why does moisture weaken corrugated boxes?

Paper fibres absorb water, reducing their stiffness and weakening the corrugated board. This lowers compression strength, bursting strength, and overall box performance.

Can corrugated boxes become weak without direct contact with water?

Yes. High humidity alone can cause paper to absorb moisture from the air, reducing its strength over time.

Which test measures moisture resistance?

The Cobb Test measures how much water the paper absorbs, while moisture content tests determine the amount of moisture already present in the paper.

How should corrugated boxes be stored?

Boxes should be stored indoors, on pallets, away from moisture, in clean and well-ventilated warehouses with controlled humidity.

Is moisture-resistant packaging available?

Yes. Moisture-resistant kraft paper, special coatings, and customized board constructions are available for applications exposed to humid conditions or export environments.

Conclusion

Moisture is one of the most significant factors affecting the performance of corrugated packaging. Excess humidity or water exposure can reduce compression strength, weaken paper fibres, affect print quality, and increase the risk of packaging failure during storage and transportation. By understanding these effects and implementing proper storage, material selection, and quality testing, businesses can significantly improve packaging reliability.

At Asian Packaging Industries, we combine advanced manufacturing technology, premium raw materials, and rigorous quality testing to produce corrugated packaging that performs consistently across a wide range of environmental conditions. Whether your products are transported locally or exported internationally, our customized packaging solutions are designed to provide dependable protection from production to delivery.

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