1. The Importance of Bursting Strength in Carton Boxes

Bursting strength refers to the ability of a carton box to withstand pressure without rupturing or bursting. It is a measure of the maximum force or weight that a box can endure before it fails. This factor is highly significant as it ensures the protection and safe transportation of the contents within the box.

The burst factor, which is the ratio of the bursting strength to the basis weight of the paperboard used in the box, is another useful metric. The burst factor helps in understanding the efficiency of the packaging material used and assists in making informed decisions during the design process.

Furthermore, the quality of the manufacturing process plays a significant role in the ultimate bursting strength of a carton box. Precise cutting, accurate folding, and secure gluing are crucial to ensure the structural integrity and performance of the box.

2. Burst Test (Mullen Burst Test)

To determine bursting strength, a standardized test called the Mullen test is performed.

The Mullen Test measures how much force is required to burst the main the force required to burst the corrugated board or paperboard. This is important because it tells you how much force your box can withstand and how much weight your box can hold when your boxes are tossed around, which will likely happen with couriers and their rough handling of packages.

During this test, a hydraulic or pneumatic machine applies pressure to a specific area of the box to measure the force required to rupture it. The results are usually expressed in pounds per square inch (PSI) or kilopascals (kPa).

Mullen Burst test machine

A small piece of your corrugated packaging is inserted flat in between a machine where a small rubber ball applies pressure under the packaging to see how much force it can withstand before bursting. Burst tests are measured in pounds per square inch and are reported as a box rating. For example, a 200# rating means that the box can withstand 200 pounds per square inch (psi) force applied before bursting.

If the Mullen Test result of a box is 200 psi, it indicates that the box can withstand relatively high pressure, making it suitable for packing heavy or fragile goods. On the other hand, for lightweight or low-value items, a box with a lower rating (125–150 psi) is sufficient and more cost-effective.

3. How to Apply the Bursting Strength in selecting Carton Boxes

Is higher bursting strength always better? The answer is: not necessarily. While higher bursting strength allows a carton box to withstand greater pressure and better protect the contents, it also increases production costs unnecessarily. Your business should choose a bursting strength that matches the characteristics of the product and the transportation conditions.

You can refer to the following basic guideline when selecting popular carton boxes based on bursting strength:

  • Below 150 psi: Low bursting strength – Suitable for lightweight goods with minimal impact risk.
  • 150–200 psi: Medium bursting strength – Appropriate for general-purpose products.
  • 200–275 psi: Relatively high bursting strength – Recommended for heavier or fragile items.

Phu Vinh Phuc Paper Company is proud to be a trusted supplier of high-quality carton boxes that meet all bursting strength standards, ensuring optimal protection for your products during transportation and storage. With a professional team and modern technology, PVP offers tailored packaging solutions to suit your specific needs.
Please contact us for detailed consultation.

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PHU VINH PHUC PAPER MANUFACTURING TRADING ONE MEMBER COMPANY LIMITED

  • Head Office: No. 168-170 Tran Thi Hoa Street, Quarter 4, Binh Da Ward, Bien Hoa City, Dong Nai Province, Vietnam
  • Factory: 326/6 Thanh Thai Street, Tan Cang Quarter, Phuoc Tan Ward, Bien Hoa City, Dong Nai Province, Vietnam.
  • Hotline: +84 983 123 201 or +84 974 65 79 79 or +84 986 759 076
  • Email: phuvinhphucpaper@gmail.com - amanda.pvpcarton@gmail.com
  • Website: phuvinhphucpaper.com
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