Load-bearing capacity of the cardboard box

07/06/2021

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Table of Contents

1. What is the load-bearing capacity of a cardboard box?
2. How to calculate the load-bearing capacity of a cardboard box
3. Which type of cardboard box has good load-bearing capacity?
4. Hoang Phuc Pack Cardboard Box Manufacturing Company

The load-bearing capacity of a cardboard box is one of the criteria for checking the quality of cardboard boxes today. The greater the load-bearing capacity of the cardboard box, the better the quality of the cardboard box, ensuring that goods are optimally protected, bringing peace of mind to manufacturers, businesses, and users.

The load-bearing capacity of a cardboard box

So, what is the load-bearing capacity of a cardboard box? What factors affect the load-bearing capacity of a cardboard box? How is the load-bearing capacity of a cardboard box calculated? Which type of cardboard box has good load-bearing capacity? Join Hoang Phuc Pack to learn and find detailed answers to the above questions in the article below.

1. What is the load-bearing capacity of a cardboard box?

The load-bearing capacity of a cardboard box is its ability to bear and distribute the weight of goods when packaged and used. The higher the load-bearing capacity of the cardboard box, the more durable the cardboard box standard, meeting all requirements and conditions for packaging and transporting goods.

The load-bearing capacity of a cardboard box is one of the standards used to evaluate the quality of cardboard boxes, which manufacturers and customers pay attention to when printing and producing cardboard boxes on demand.

The higher the load-bearing capacity of the cardboard box, the safer it is for packaging and transporting goods, especially for heavy goods that require high packaging and transportation standards.

1.1 The role of the load-bearing capacity of a cardboard box

The load-bearing capacity of a cardboard box is particularly important to manufacturers and businesses because:

The higher the load-bearing capacity of the cardboard box, the better its ability to protect goods, ensuring the safety of the goods during transportation.
The ability of the cardboard box to distribute weight evenly helps reduce pressure on the bottom of the box.
It helps limit impacts between the goods and the surface of the cardboard box during transportation.
It prevents the cardboard box from deforming during transportation when stacked, compressed, etc.

1.2 Factors affecting the load-bearing capacity of a cardboard box

Cardboard boxes are mainly made from various types of cardboard paper. And the load-bearing capacity of a cardboard box is usually affected by factors such as: paper grammage, cardboard flute, the quality of the paper used for production, the number of paper layers when producing the cardboard box, etc.

Depending on each product and packaging requirement, businesses and manufacturers usually choose the above factors as a scoring system to evaluate the load-bearing capacity and quality of the cardboard box.

2. How to calculate the load-bearing capacity of a cardboard box

To determine the load-bearing capacity of a cardboard box, we will rely on the specific criteria and methods below:

2.1 Criteria for evaluating the load-bearing capacity of a cardboard box

Generally, packaging and cardboard box durability standards are determined through factors such as: tensile strength, bursting strength, tear strength, stacking strength, and surface strength. Depending on the usage needs and each manufacturing business, these factors have their own evaluation scale.

a) Bursting strength of a cardboard box

The bursting strength of a cardboard box is the maximum pressure that the cardboard paper can withstand when subjected to force acting perpendicular to the horizontal plane of the paper.

Different cardboard paper grammages will give different bursting strength results. The higher the cardboard paper grammage, the greater the bursting strength of the cardboard box.

b) Puncture resistance of a cardboard box

The puncture resistance of a cardboard box is the durability and load-bearing capacity of the cardboard box when subjected to the pressure of an object directly puncturing the cardboard box.

The puncture resistance of a cardboard box is usually affected by factors related to the quality of the cardboard paper, such as: fiber length, fiber strength, as well as the bonding between fibers…

c) Drop resistance

The drop resistance of a cardboard box is a method of checking the load-bearing capacity of the cardboard box when dropped from a certain height during the transportation and distribution of goods.

The number of cardboard paper layers, cardboard paper quality, cardboard paper grammage, cardboard flute, etc., are the combined factors that create the extremely durable load-bearing capacity of the cardboard box when tested by the ability to drop from a certain height.

d) Stacking strength of a cardboard box

The stacking strength of a cardboard box is the ability of the cardboard box to withstand the weight of various goods when stacked under a certain gravitational load.

The stacking strength at different positions of the cardboard box will determine the force distribution capacity of the cardboard box when packaged.

e) Compression strength of a cardboard box

You can determine the load-bearing capacity of a cardboard box through the flat crush strength and edge crush strength of the cardboard box. The higher the compression strength of the cardboard box, the better its load-bearing capacity, and the box will not collapse, fail, or tear when stacked.

2.2 Methods for calculating the load-bearing capacity of a cardboard box

There are many methods for calculating the load-bearing capacity of a cardboard box. Among them, the Elmendorf method is currently the most commonly used due to its high accuracy.

The formula for determining the strength/load-bearing capacity of a cardboard box: X= F / g, in which:

X: is the strength index, calculated in millinewtons per square meter per gram (mN.m2/g).
F: is the strength, calculated in millinewtons (mN).
G: is the grammage, calculated in grams per square meter (g/m2), determined according to TCVN 1270 (ISO 536).

Cardboard box test samples are determined according to the TCVN 3649:2000 standard, and the test samples are conditioned according to the TCVN 6725:2000 standard.

In different environments, the cardboard paper will have different effects on the strength and load-bearing capacity of the cardboard box. Therefore, when calculating the strength and load-bearing capacity, you need to clearly determine the time, location, and usage environment of the cardboard box to ensure accuracy.

3. Which type of cardboard box has good load-bearing capacity?

As shared above, paper quality, paper grammage, the number of paper layers, etc., will directly affect the load-bearing capacity of the cardboard box. Therefore, each type of cardboard box has a different structure, so its load-bearing capacity will be different.

Below, Hoang Phuc Pack would like to share with you the types of cardboard boxes with the best load-bearing capacity today as follows:

3.1 3-layer cardboard box

True to its name, a 3-layer cardboard box has a structure consisting of 3 layers of quality cardboard paper, creating a box model with high durability, good load-bearing capacity, and high aesthetics. The structure of a 3-layer cardboard box is as follows:

Outer cardboard paper layer: The cardboard paper layer located on the outermost surface of the box is made from quality, smooth, bright, and especially flat and beautiful cardboard paper to create a quality box model with high aesthetics. The 3 most commonly chosen cardboard paper colors are yellow, brown, and white.
Bottom cardboard paper layer: Uses a type of hard paper with good load-bearing capacity to support the cardboard box when packaged. According to Hoang Phuc's years of experience in cardboard box manufacturing, the bottom cardboard paper layer is usually chosen with a paper grammage twice as high as the outer paper layer.
Middle sinusoidal flute paper layer: This flute paper layer is placed between the bottom and the outer surface. Usually, this paper layer is created with sinusoidal flute grooves to create cushioning layers for the cardboard box, increasing its load-bearing and impact resistance during transportation, while limiting impacts during packaging. This is an essential and indispensable paper layer that creates the quality of the cardboard box and increases its load-bearing capacity, thus helping customers love and trust using 3-layer cardboard boxes more and more.

3.2 5-layer cardboard box

A 5-layer cardboard box is a type of cardboard box that businesses highly evaluate in terms of quality and prioritize choosing. The box is specially structured from 5 layers of premium cardboard paper as follows:

2 surface cardboard paper layers: The 2 surface cardboard paper layers play an important role in creating the aesthetics of the cardboard box. The chosen papers must have a shiny surface and good paper quality to clearly print brand information and sharp images, ensuring high aesthetics for the box.
2 middle cardboard flute paper layers: The 2 middle paper layers are formed with many different types of flutes. The thicker the flute, the better the quality of the cardboard box is ensured, especially its distribution and load-bearing capacity when packaging goods.
1 cardboard paper layer between 2 sinusoidal flute paper layers: The cardboard paper layer between the 2 sinusoidal flute layers plays the role of bonding the 2 sinusoidal flute paper layers, increasing the durability of the cardboard box to create good elasticity, further enhancing the quality of the cardboard box.

3.3 7-layer cardboard box

7-layer corrugated box is a type of box made of 7 layers of corrugated paper, including 2 outer layers and 2 inner layers alternating with 3 sinusoidal corrugated layers. The specific structure of a 7-layer corrugated box is:

2 outer layers: The outer layer of the box reflects the professionalism and quality of the product with information from the manufacturer (Logo, address, product name, specifications, etc.), so it is usually very smooth and glossy, and the paper selected is flat and smooth.
5 middle layers: These are paper layers formed by 3 sinusoidal corrugated layers alternating with 2 flat paper surfaces using modern corrugation technology to increase the box's load-bearing capacity.
Bottom layer: This is the remaining 2-sided layer of the corrugated layer glued to the top surface and the bottom of the corrugated box. The bottom layer can prioritize using thicker, harder paper to increase load-bearing capacity and protect the product more securely and safely.

Thus, the more paper layers, the higher the paper weight, and the higher the sinusoidal corrugated layer pitch, the higher the load-bearing capacity of the corrugated box. Therefore, among the 3 types of corrugated boxes above,

The 7-layer corrugated box has the highest load-bearing capacity and is used to transport goods requiring extremely high packaging standards, fragile goods, and goods with extremely large weight and dimensions.
The 5-layer corrugated box has good load-bearing capacity and is suitable for all types of goods, especially goods requiring high transportation standards such as goods transported by air, ship, etc.…
Finally, the 3-layer corrugated box has a low load-bearing capacity, so it is usually used to pack and transport lightweight, compact goods requiring continuous shipping such as COD shipping, e-commerce, etc.…

4. Hoang Phuc Pack Corrugated Box Manufacturing Company

Hoang Phuc Corrugated Box Manufacturing Company is a unit specializing in manufacturing and supplying corrugated boxes with high load-bearing capacity, diverse sizes, styles, and designs, serving various industries such as fashion, cosmetics, accessories, agricultural products, food, footwear, electronic equipment, etc.

As a direct manufacturing unit, we commit to controlling and ensuring product quality from raw materials to finished products, bringing superior quality corrugated box designs that meet all customer packaging and transportation requirements.

Our corrugated box products have guaranteed quality and stable prices serving various industries. Furthermore, with the advantage of being a direct manufacturing unit without intermediaries, customers will enjoy the most preferential and best prices to serve the business, packaging, and transportation activities of the enterprise.

If you are looking for a quality corrugated box manufacturing unit at an affordable price, do not hesitate to contact Hoang Phuc Pack immediately, even if you need to print corrugated boxes for goods in medium and small quantities. We are always ready to support you.

4.1 Corrugated Box Manufacturing Process at Hoang Phuc

At Hoang Phuc Pack, you can be completely assured by the professional and specific manufacturing process, ensuring that customers are satisfied with the quality as well as the fastest delivery time, specifically:

Step 1: Receive corrugated box manufacturing request
Step 2: Determine needs, purpose of use, and product characteristics
Step 3: Advise on choosing the appropriate corrugated box type in terms of size, paper weight, style, etc.
Step 4: Sign the manufacturing and printing contract as previously agreed.
Step 5: Design the corrugated box sample according to requirements.
Step 6: Check the design sample, edit, and approve the sample.
Step 7: Print the corrugated box demo sample, approve the printing sample
Step 8: Print corrugated boxes in the required quantity
Step 9: Deliver according to requirements.
Step 10: Settle the manufacturing contract.

4.2 Policies, commitments

As a direct manufacturing unit, Hoang Phuc Pack commits to supporting customers with:

Preferential pricing policy, best support for all customers.
Free corrugated box design support.
Deliver to the door in the inner city area of Ho Chi Minh City and neighboring provinces. For customers far away, we will support delivery to the shipping depot.
Commit to product quality as originally agreed.
Delivery time is guaranteed to be on time.

The above is the information about the load-bearing capacity of corrugated boxes. We hope the article will bring you a lot of useful information. If you still have any questions about corrugated boxes or need to find a manufacturing and printing unit in Ho Chi Minh City, contact Hoang Phuc Pack immediately to be advised and answered as quickly as possible.

>> You may also see cardboard boxes for COD shipping

With practical experience in manufacturing and printing various types of corrugated boxes, Hoang Phuc Pack is ready to support you. For detailed information, please contact:

Hoang Phuc Pack Industrial Manufacturing Co., Ltd.