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2025
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06
The Importance of Air-Board Seal Integrity and Selection Tips: Avoiding the Risk of Packaging Failure
In fields such as logistics packaging and industrial turnover, hollow board has become the preferred material for replacing traditional paper packaging thanks to its lightweight, foldable, and environmentally friendly properties. However, many users tend to overlook a crucial metric when making purchases— Sealing performance This article will analyze the importance of this core element from three aspects: the impact of sealing performance on packaging effectiveness, detection methods, and purchasing recommendations.
I. The Three Major Dangers of Poor Sealing Performance
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Product Leakage Risk When hollow board packaging has poor sealing performance, liquids and powdered substances are highly likely to leak during transportation due to compression or impact, leading to contamination or financial losses. For example, in the food industry, if sauces are packaged in hollow boards with inadequate sealing, the packaging may rupture and the contents may spill out.
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Reduced environmental adaptability Hollow boards with poor sealing are prone to absorbing moisture and deforming in humid or dusty environments, or getting contaminated by dust, thereby compromising the cleanliness of the items stored inside. For example, if the packaging for electronic components is not tightly sealed, static electricity could attract dust, adversely affecting product performance.
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Shortened service life When exposed for extended periods to environments with significant fluctuations in temperature and humidity, hollow-core panels with poor sealing will age more rapidly, leading to a reduction in structural strength and increasing maintenance or replacement costs.
II. Key Factors Affecting Sealing Performance
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Material Ratio and Process The sealing performance of hollow boards is closely related to the ratio of raw materials (such as PP resin) and the heat-sealing process. Substandard products may have weak heat-seal layers due to insufficient胶 layer thickness or improper control of heating temperature.
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Temperature change Experiments show that temperature fluctuations can alter the molecular structure of hollow-core board materials, reducing the adhesive strength of the sealing layer. For example, in high-temperature environments, some hollow-core boards may experience softening of the heat-sealing layer and subsequent failure of the seal.
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External impact Overstacking or mechanical impact may cause cracking at the edges of hollow boards, compromising the integrity of the seal.
III. How to test for leak tightness?
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Visual estimation Observe whether the heat-sealed edges of the hollow board are smooth and free of bubbles or signs of false soldering. The heat-sealing layer of a high-quality product should be uniform and flawless.
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Air-tightness test After inflating and sealing the hollow-board packaging, let it sit undisturbed for 24 hours, then use a pressure gauge to monitor any changes in pressure. The smaller the drop in pressure, the better the seal.
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Simulation environment testing Place the hollow board in a high-temperature, high-humidity environment and observe whether it exhibits moisture absorption and deformation or if the sealing layer has come loose.
IV. Shopping Recommendations
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Prioritize choosing professional manufacturers. For example, companies such as Zhejiang Yourong and Ningbo Lulong have products that have undergone multiple tests—including sealing performance and pressure resistance—and can provide customized solutions.
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Clearly define the use case
- Food/Medical Industry You need to select hollow PP boards made of moisture-resistant, high-temperature-resistant material to prevent the contents from becoming damp and spoiled.
- Electronic component packaging Anti-static hollow boards should be used to prevent electrostatic damage to precision components.
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Request the test report Suppliers are required to provide third-party test reports on sealing performance, resistance to aging, and other relevant aspects to ensure the authenticity and reliability of the data.
Conclusion
Sealing performance is an “implicit threshold” for the functionality of hollow board products, directly affecting both the safety and cost-effectiveness of packaging. When making a purchase, users should comprehensively consider the application scenario, testing methods, and manufacturer qualifications, giving priority to products that meet the required sealing standards. By selecting materials scientifically and conducting rigorous testing, it’s possible to significantly enhance the reliability of logistics and transportation, thereby reducing business risks.
Relevant Information
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