How is the compression resistance and durability of Paper carton?

The compression resistance and durability of paper cartons are their core performance indicators, which directly affect their performance in packaging, transportation and storage. The following is a detailed analysis of the compression resistance and durability of paper cartons from the aspects of material characteristics, structural design, environmental impact and optimization measures, and discusses how to improve these performances.

1. Performance of compression resistance
(1) Influence of material characteristics
Corrugated paperboard: Corrugated paper is the main material of paper boxes, and its compression resistance depends on the shape, number of layers and material of the corrugations.
Corrugated shape: Common corrugated shapes include type A (high and wide, suitable for cushioning), type B (low and dense, suitable for compression resistance) and type C (medium height, good overall performance). Different shapes have a significant impact on the compression strength of paper boxes.
Number of layers: Single-layer corrugated paperboard is suitable for lightweight packaging, while double-layer or triple-layer corrugated paperboard has higher compression resistance and is suitable for heavy items.
Material selection: High-weight kraft paper or recycled paper can improve the compression resistance of paper boxes, but the cost is higher.
White cardboard and kraft paper: White cardboard is usually used for cartons with high appearance requirements and has low compressive resistance; kraft paper is often used for logistics and transportation cartons due to its high strength and toughness.
(2) Influence of structural design
Carton size and proportion: The ratio of the height to the bottom area of ​​the carton has an important influence on the compressive resistance. Too high a height may cause uneven force on the side walls and reduce the compressive resistance.
Jointing method: Glued seams are more uniform than nailed seams and have better compressive resistance, but require higher process precision.
Strengthening design: Adding support structures (such as cross partitions or honeycomb paper cores) inside the carton can significantly improve the compressive resistance.
(3) Testing and evaluation
Compressive strength test: Use a pressure tester to measure the maximum load-bearing capacity of the carton, usually expressed in "kgf".
Stacking test: Simulate actual stacking conditions to evaluate the deformation and damage risks of the carton under long-term pressure.
2. Durability performance
(1) Impact of environmental conditions
Humidity: Cartons tend to absorb water in high humidity environments, causing fiber expansion, reduced strength, and even deformation. Waterproof coating or lamination can significantly improve this problem.
Temperature: Extremely low temperatures may cause cartons to become brittle and increase the risk of rupture; high temperatures may accelerate adhesive aging and cause seam cracking.
Vibration and shock: During transportation, cartons need to withstand vibration and shock. The cushioning properties of corrugated paper can absorb some of the impact force, but if it is not designed properly, it may cause damage to the contents.
(2) Impact of usage scenarios
Logistics and transportation: Cartons need to have good compression resistance and wear resistance during stacking, handling, and long-distance transportation, especially in the case of frequent handling in e-commerce logistics.
Cold chain transportation: The low temperature and humidity in cold chain transportation place higher demands on the durability of cartons, requiring the use of special moisture-proof materials or coatings.

Food and pharmaceutical packaging: These fields have higher requirements for the hygiene and durability of cartons, and need to avoid loss of contents due to moisture or contamination.
3. Measures to improve compression resistance and durability
(1) Material optimization
High-weight paper: Increasing the weight of paper can improve the overall strength of the carton, but it will increase the cost.
Combination of recycled paper and virgin paper: Using recycled paper as the inner layer and virgin paper as the outer layer can reduce costs while ensuring performance.
Waterproof coating: Applying a waterproofing agent (such as wax or silicone oil) on the surface of the carton can effectively prevent moisture penetration and extend the service life.
(2) Process improvement
Corrugated forming technology: Use high-precision corrugated forming equipment to ensure that the corrugated shape is consistent and evenly distributed.
Gluing process: Use high-performance environmentally friendly glue to ensure that the seams are firm and not prone to cracking.
Hot pressing and shaping: Hot pressing the carton to reduce the risk of warping and deformation.
(3) Design optimization
Structural design: Use a scientific box design (such as a lock-type structure or a double-layer bottom plate) to enhance the overall stability of the carton.
Edge reinforcement: Add reinforcement strips to the four corners or edges of the carton to improve compression resistance.
Shock-absorbing design: Add cushioning materials (such as foam pads or pulp molding) inside the carton to protect the contents and disperse external pressure.
(4) Surface treatment
Laminating treatment: Covering the surface of the carton with a layer of plastic film (such as BOPP film) can improve water resistance and wear resistance.
Nano coating: Use nano material coating to enhance the water resistance, oil resistance and antibacterial properties of the carton.

The compression resistance and durability of Paper Carton are affected by many factors such as material properties, structural design, environmental conditions and manufacturing process. By optimizing material selection, improving production process, scientifically designing structure and adding surface treatment, the compression resistance and durability of the carton can be significantly improved to meet the needs of different application scenarios.