Packaging Quality Issues & Solutions XII

答：

Products such as flavored bean curd, when consumers open the packaging, smell a pungent odor similar to that of paint. In severe cases, the odor has even spread to the food itself, affecting food safety and the consumer experience.

Solution：

1. Solvent residue detection (gas chromatography method): Refer to GB/T 10004-2008. Take the packaging film samples, cut them, and place them in the test bottle. Use a gas chromatograph to heat the residual solvents to vaporize them, then separate them through the chromatographic column for qualitative and quantitative analysis of various organic solvents (ketones, esters, alcohols, benzene types, etc.). The detection limit can reach the ppb level.The test can be conducted by the GC tester.
2. Odor migration accelerated simulation test: Accelerate the simulation of odor migration of the packaging under actual usage conditions in high temperature and high humidity, to predict the risk of odor contamination of the packaging material to the contents.

答：

The key information such as the production date, batch number, expiration date, etc. on the packaging box is blurred at the character edges, missing, having double images or being wrongly printed. This makes it impossible to trace the product or results in the product being judged as unqualified by the regulatory authorities.

Solution:

1. Full-frame inspection with line-scanning camera: For the roll-to-roll high-speed printing process, a high-resolution line-scanning camera is used to achieve 100% online full-volume inspection, completely solving the problem of missed inspections in manual sampling.
2. Independent verification of key areas: Precise segmentation and independent quality verification are carried out for important information areas on the packaging, such as trademarks, legal statements, and safety warnings, to ensure no missing or incorrect printing.
3. Inkjet marking verification system: Even if there are issues such as ink dot offset, character deformation, or ghosting in the inkjet marking, the system can still achieve reliable content verification at a speed of over 1,200 packages per minute.

答：

During the transportation and storage of PET bottled beverages and glass bottled seasonings, the torque of the bottle caps decreases, resulting in the failure of sealing and causing leakage, loss of CO₂ (for carbonated beverages, the beverage becomes less fizzy), or the intrusion of external contaminants.

Solution:

1. Torque test: Use a torque tester to measure the opening torque and locking torque of the bottle cap, and evaluate the tightness of the fit between the bottle cap and the bottle mouth. The opening torque range is usually controlled within 0.5 to 5 N·m.The test can be conducted by the torque tester (https://www.linktesting.org/1066.html/bottle-cap-torque-tester-lttt-20/)
2. Sealing performance test (positive pressure/vacuum method): Apply pressure or evacuate the bottle to measure the leakage rate. The qualified standard usually requires the leakage rate to be ≤ 0.1 mL/min (test pressure 50 kPa).The test can be conducted by the leak tester(https://www.linktesting.org/903.html/leakage-tester/)
3. Pressure holding test: Apply a constant pressure (0 to 100 kPa) to the bottle cap, maintain for 60 seconds, and monitor the leakage threshold (≤ 0.5 mL/min).The test can be conducted by the Intelligent Sealing Instrument (https://www.linktesting.org/1225.html/intelligent-sealing-instrument-mfy-06s/)

答：

Glass wine bottles, ceramic handicrafts, and precision electronic products all have a consistently high rate of damage during the courier logistics process. The insufficient packaging cushioning design leads to the products being damaged during drops and vibrations.

Solution:

1. Drop test: According to GB/T 4857.5, the packaging items are dropped freely from different heights (0.5m, 1.0m, 1.5m), with each height repeated three times. The damage of the products is recorded.
2. Vibration test: Simulate the transportation vibration environment, set different frequencies (5~100Hz) and amplitudes, and conduct the test for 2 to 4 hours to observe the product condition and position changes.
3. Stacking compression resistance test: Refer to GB/T 4857.2, gradually apply pressure (500N, 1000N, 2000N) to the packaging items, maintaining for 10 to 30 minutes, and record the deformation and damage.The test can be conducted by the box compression tester (https://www.linktesting.org/884.html/carton-compression-tester-kyj-10k/)

答：

After being stored in the warehouse for a period of time, corrugated cardboard boxes may experience deformation, bulging or even collapse, resulting in product compression damage or entire stacks of boxes collapsing.

Solution:

1. Stacking strength test (static load method): Apply a constant load that simulates actual stacking on the packaging unit, maintain for a predetermined period (usually 24 to 72 hours), and monitor the creep deformation of the box and the final failure situation.The test can be conducted by the compression tester(https://www.linktesting.org/884.html/carton-compression-tester-kyj-10k/)
2. Compressive strength test (pressure testing machine method): Use a pressure testing machine to uniformly apply pressure to an empty carton or a fully loaded carton, and determine the yield pressure, maximum compressive load, and permanent deformation rate.The test can be conducted by the compression tester (https://www.linktesting.org/884.html/carton-compression-tester-kyj-10k/)
3. Edge pressure strength test (ECT): Measure the compressive strength of the edge of corrugated cardboard, which is the core indicator for evaluating the overall compressive strength of the carton.The test can be conducted by the paper crush tester (https://www.linktesting.org/5407.html/paper-crush-tester-hsd-01a/)