How to quickly determine the sealing performance of ton bags

In the logistics transportation and warehousing industry, ton bags are an important packaging container, and their sealing performance directly affects the safety and quality of the materials they contain. In recent years, with the increasing awareness of material protection in the industry, how to quickly judge sealing performance has become a common concern in the industry. This article will introduce several practical judgment methods to help industry professionals better choose and use ton bags. Here are some quick methods to assess sealing performance:

1. Observe the sealing line

Flatness: Check if the sealing line is flat and free of wrinkles. The sealing of high-quality ton bags should be evenly adhered without bubbles or impurities.

Integrity: Ensure that the sealing line is continuous without any broken or missing parts.

2. Check the bag body

Pinholes and scratches: Use strong light to illuminate the bag body and observe for pinholes or scratches. Areas with uneven light transmission may have sealing defects.

Material uniformity: Check whether the material of the bag body is uniform, without any weak points or damages.

3. Air pressure test

Pinch test: Pinch and inflate the ton bag to feel the change in air pressure. If there is a slow air leakage (such as a significant decrease in air pressure within 30 seconds), the sealing performance is poor.

Water pressure test: Fill a ton bag with a certain volume of water (such as 1/3 volume), discharge the air, seal it, and let it stand upside down for a period of time (such as 10 minutes). Observe whether there is any water seepage phenomenon. If the water seepage exceeds a certain amount (such as 5 drops), it is considered unqualified.

4. Repeated opening and closing test

Elasticity and deformation: Repeatedly open and close the seal 3-5 times, observe whether the sealing strip maintains elasticity and no deformation. Deformed or inelastic sealing strips may lead to a decrease in sealing performance.

5. Professional equipment testing

Leakage speed test: Use professional equipment to test the leakage speed of ton bags to quantitatively evaluate their sealing performance.

Leakage pressure test: By injecting a certain pressure of gas into the interior of the ton bag, observe whether it can maintain a sealed state to evaluate its pressure resistance and sealing performance.

6. Precautions

Avoid overloading: When loading materials, ensure that there is a certain gap (such as at least 2cm) between the contents and the seal to prevent the seal from cracking under stress.
Storage environment: When storing ton bags for a long time, a dry and ventilated place should be selected, and covered with opaque shed cloth to prevent direct sunlight and rainwater erosion, thus maintaining their sealing performance.
In summary, by observing the sealing line, inspecting the bag body, conducting air pressure tests, repeatedly opening and closing tests, and using professional equipment for testing, the sealing performance of ton bags can be quickly determined. In practical applications, it is recommended to combine multiple testing methods and select suitable ton bag products according to specific needs.