Source: Link Testing Instruments Co.,Ltd.
I. Common Causes of Packaging Ruptures
**Insufficient Material Strength**
Uneven packaging film thickness, low peel strength between laminated layers, or an excessively high proportion of recycled material in the raw stock can all compromise the bag's tensile and puncture resistance. This makes the bag prone to rupturing at points where stress is concentrated.
**Improper Heat Sealing Process**
Excessively high heat-sealing temperatures can cause the sealing material to age and become brittle, while temperatures that are too low result in weak seals. Furthermore, if dust, oil stains, or liquid contaminants are trapped within the seal area, they create localized weak points that may crack under even slight stress.
**Flawed Packaging Design**
Narrow heat-seal margins, sharp-angled corners, or the failure to designate a proper "easy-tear" notch location can all cause stress to concentrate within a small, specific area during handling, thereby triggering a rupture.
**Harsh Storage and Transport Environments**
During stacking or transit, excessive stacking heights, frequent compression, or repeated impacts can exacerbate the risk of rupture. Additionally, a decline in material toughness under low-temperature conditions can further aggravate this issue.
II. Targeted Improvement Recommendations
Select suppliers of food-grade packaging films known for consistent quality, and request test reports for key performance indicators such as tensile strength, elongation at break, and puncture resistance.
Regularly calibrate the temperature and pressure parameters of heat-sealing equipment to ensure seals are flat, uniform, and free of residual contaminants.
Optimize the bag's structural design by appropriately widening the heat-seal margins and incorporating rounded transitions at the corners.
Standardize warehouse and transport management protocols to control stacking heights effectively and avoid rough handling, particularly in low-temperature environments.
III. Recommended Testing Equipment
To systematically identify and resolve packaging rupture issues, it is recommended that enterprises equip themselves with the following testing instruments:
**Tensile Testing Machine:** This device is used to measure a film's tensile strength, elongation at break, heat-seal strength, and puncture resistance, serving as a fundamental tool for evaluating the mechanical properties of packaging materials.
**The heat seal tester** is capable of simulating the heat sealing process encountered in actual production, helping to determine the optimal combination of heat sealing temperature, pressure, and time.
**The falling dart impact tester** is primarily used to evaluate the ability of films to withstand dynamic impact, and is suitable for simulating scenarios involving accidental drops or collisions during transportation.
**The leak tester** is used to inspect the overall seal integrity of finished packaging, enabling the rapid detection of minute leak points in the seals or the body of the bag.
For more details please visit www.linktesting.org
