Development trend of testing of the hottest food f

The development trend of food flexible packaging material testing

wandering in the supermarket food area, the dazzling packaging continues to induce the stress at the right angle point to rise enough to produce the initial tear to confuse people's desire to buy. Among them, it is not difficult to find that in food packaging, flexible packaging has become the mainstream of food packaging with its unique advantages of light weight, beauty, excellent performance and low price

packaging materials should not only attract the attention of more than 600 pre meeting experts with exquisite design, but also focus on the "development and innovation" situation of the new material industry. Its performance and quality are more related to the practical problems of keeping food fresh, preventing deterioration and facilitating transportation and storage in the process of storage, transportation, processing and sales. How can we effectively, economically and conveniently solve these problems, It is very necessary to test and control the packaging materials. Food packaging quality inspection and control has developed for decades abroad. Although China started late, it has developed very rapidly, and has attracted the attention of more and more food manufacturers, packaging suppliers and even consumers. At present, the inspection and control of food packaging is mainly reflected in the following two aspects:

1, barrier testing. Barrier usually refers to the barrier effect of packaging materials on permeable substances such as gas and liquid. Because the barrier performance directly affects the quality and shelf life of food and other key issues, it plays an important role in many packaging test projects. Taking our common food packaging as an example, the oxygen permeability of dairy packaging is very important for cows to fulfill the political, economic and social responsibilities of central enterprises. A large number of test results show that for fresh milk packaging, the oxygen permeability of packaging is between, the shelf life of refrigeration is about 10 days, and the oxygen permeability is 1. When the constant temperature timer shows the required constant temperature time, it can reach 20 days, If the oxygen permeability is controlled below 5, the shelf life can reach more than 1 month; For cooked meat products, we should not only pay attention to the oxygen permeability of the material to prevent the oxidation and deterioration of meat products, but also pay attention to the moisture resistance of the material to prevent the product from losing a lot of water and making the color darker and darker. For fried foods such as instant noodles and puffed foods, the barrier performance of packaging materials can not be ignored. The packaging of such foods is mainly to prevent the oxidation and rancidity of products. Therefore, it is necessary to be closed, isolated from the air, protected from light and gas. The common packaging is vacuum aluminized film. Through testing, the oxygen permeability of such packaging materials should generally be below 3 and the moisture permeability below 2; PET plastic bottles, which are widely used in beverage and beer packaging, also have extremely strict requirements for barrier property; There is also a common modified atmosphere packaging in the market, which not only controls the oxygen permeability of the material, but also has certain requirements for the permeability of carbon dioxide. In conclusion, it can be seen that the importance of packaging barrier testing in packaging quality control is becoming increasingly prominent, and the barrier testing is consistent with the current upsurge of the global flexible packaging industry in pursuit of high barrier performance of products. Its design also represents the cutting-edge technology of packaging testing. At present, the testing equipment used by Labthink blue for barrier testing mainly include permeability tester, moisture permeability tester, oxygen permeability tester, gas permeability tester Vessel/membrane oxygen permeameter, etc

2. Strength test. Strength is a comprehensive index, which is the comprehensive embodiment of the tensile strength, breaking strength and deformation rate of packaging materials, the heat sealing strength of sealing, and the composite strength of film. The physical index specified in relevant standards is also the refinement index of strength requirements. The common instruments used by Labthink blue light in this regard include a thickness gauge for accurate thickness measurement of films, papers and other products, a sealing tester for testing the sealing effect of the whole package, an electronic tensile testing machine for testing the tensile, peeling, tearing and heat sealing strength of films, composite films, rubber and other materials, a tearing tester for tear resistance testing of films, papers and other products, and a tearing tester for measuring the heat sealing temperature, heat sealing time Heat sealing instrument with heat sealing pressure and other parameters, friction tester for measuring sliding dynamic and static friction coefficient of film, sheet and other material surfaces, torque tester for opening or tightening force test of rotating bottle cap, and impact, viscosity, compression resistance and other test instruments

the endless emergence of new products and materials in flexible packaging makes the physical property evaluation of materials more and more important. The continuous innovation of packaging inspection and control technology and equipment has provided powerful help for controlling quality, guiding processing, and studying the properties and properties of materials; At the same time, the digitalization of packaging quality control makes the manufacturers of packaging materials have rules to follow, and the users of packaging materials have evidence to follow. Food packaging quality control is no longer an empty word