Packaging testing technology is a science and technology that studies the performance testing and analysis of packaging materials, packaging containers, and packaging products. It is mainly used to test the performance of packaging materials and packaging products in the circulation process and evaluate their performance. Including packaging materials, packaging containers, performance testing and analysis of packaging parts, and various packaging test methods.
The purpose of the packaging test is to evaluate the quality and results of the packaging, that is, to check whether the protective performance of the packaging material is good under certain circulation conditions; to investigate the possible damage of the packaging material, and to study the cause and preventive measures of the damage; Compare different packages, and check whether the performance of packaging materials and packaging containers complies with relevant standards, regulations and regulations. The main function of packaging inspection can be summarized into three aspects.
(1) Predict packaging performance and evaluate packaging functions
Through the corresponding packaging test, predict the performance of the package, and evaluate the protection ability . For example, in the use of composite plastic moisture-proof packaging and fresh-keeping packaging, it is necessary to test and analyze the air permeability, moisture permeability, adhesive . In the design of the transportation packaging system, it is necessary to study the static compression characteristics, dynamic cushioning characteristics, creep and recovery characteristics, vibration transmission characteristics of the cushioning material or structure, the carrying capacity and the compression, impact and vibration resistance of the package. Wait for test analysis.
For another example, in the process of developing dairy product packaging materials and structures, it is necessary to test and analyze the permeability, tensile properties, bursting resistance, tearing degree, puncture strength, hygiene, compressive strength, and heat seal strength of packaging materials. , but also need to test and analyze the sealing performance, compression performance, drop shock/vibration performance of packaging structures (such as packaging bags, Tetra Pak).
(2) Control the quality of packaging products and product packaging
Predicting packaging performance can make the designed or improved packaging meet the specified performance requirements, but this is not the whole of packaging quality control controlling the quality of each batch or each packaged product delivered from the factory can the produced packaging be guaranteed. The packaging meets the requirements of relevant standards or specifications. For example, in the beer filling process, the detection and control of physical parameters such as gas pressure, liquid flow, and sterilization temperature are important conditions to ensure the quality of beer packaging. - Under normal circumstances, fewer packaging test items are required to control the packaging quality , and the test method is relatively simple, but the test speed is required to be fast and the results are obvious. Generally, it is only necessary to judge whether it is qualified or not. Sometimes a quantitative result is also required.
(3) Obtain packaging improvement information
As the distribution environment, loading and unloading machinery or the performance of the packaging product itself change, the original packaging may no longer be suitable for the new use requirements, which requires improvement of the packaging. Improving packaging includes two aspects. One is to enhance the protective function of packaging and reduce packaging damage during circulation; the other is to reduce some unnecessary packaging functions, eliminate over-packaging or exaggerated packaging, and reduce packaging costs. In both cases, strict packaging tests should be carried out to analyze the possible damage caused by the packaging, study its causes , and take corresponding preventive measures.
For example, after World War II, the United States used pitch paper to wrap ammunition to good effect. But during the Vietnam War, the asphalt paper tubes had problems. Due to the high humidity and high temperature in the Vietnamese jungle, the asphalt paper tubes swelled due to moisture. Not only the paper tube could not be opened, but also the ammunition deteriorated due to moisture. To this end, the U.S. military has done a lot of experiments, and has successively adopted various improvement schemes such as sandwiching aluminum foil layers in paper slips, moisture-proof bags for ammunition in paper tubes, and moisture-proof bags for paper tubes, and finally solved the problem of the impact of asphalt paper slips on ammunition. The moisture-proof problem, and revised the military standard.
Another example is that the packaging of cameras in our country was originally made of wooden boxes, and the phenomenon of theft during transportation was very serious. Later, container to solve the problem of theft. However, the number of times wooden boxes are transported after the container is used is less, and the camera is less affected by shock and vibration during the circulation process. At this time, it is unnecessary to still use wooden box packaging, and excessive packaging has appeared. Through the test , it is proved that the corrugated box can fully meet the requirements. This not only makes the packaging more beautiful and elegant, but also reduces the packaging cost.
