Analysis on the Performance of Food Packaged Food Packaging Safety Packing in China

Food Flexible Packaging materials include polyethylene, polypropylene, polyester, polyamide and other polymer materials. These packaging materials show great differences due to their own molecular structure and molding process and additives added. Therefore, it is particularly important for food manufacturers to choose a suitable packaging material for their own products, otherwise there will be food safety issues. For example, due to the poor barrier property of the material, the shelf life of the liquid milk may be shortened, and the deterioration of the liquid milk may be caused during a certain period of time. However, if the freshness of the plastic wrap is not adequate, the freshness of the vegetable may not be guaranteed.

In order to keep the food fresh and safe to the consumer during the circulation process, it is necessary to conduct a safety inspection of the food packaging. Our performance requirements for food packaging include:

(1) Barrier properties Barrier properties include gas barriers and moisture barriers, and food degradation is due in large part to the barrier properties of the selected materials. The choice of materials should be based on different materials, shelf life, storage conditions, and other appropriate choice of barrier materials. At the end of 2005, GB19741-2005 (liquid food packaging plastic composite film and packaging bag standard) introduced GB/T1038 (plastic film air permeability test method) and GB/T1037 (plastic film and sheet water vapor permeability) for the barrier property of packaging film. Sex test methods) were tested. Because of the difficulty of the material barrier test technology, only Jinan Languang Electromechanical Technology Co., Ltd. has the ability to independently develop barrier test instruments in China.

(2) Tensile performance During the packaging process, the film is subjected to mechanical pulling force, and the external force such as extrusion is applied during transportation. This requires that the film must have sufficient tensile strength. For composite membranes, it should be ensured that there is no delamination between the membranes. This requires the composite membrane to have a high peel strength to avoid material delamination. Intelligent electronic tension machine can be selected to control tensile properties and peeling properties according to GB/T13022 (Test methods for tensile properties of plastic films).

(3) Film smoothness The film surface should have good smoothness to ensure that it can be packaged smoothly. It should be measured according to GB10006 (Measurement method of plastic film and sheet friction coefficient). Generally, the dynamic friction coefficient of the film surface is 0.2. Between -0.4. Here special attention should be paid, as the temperature increases, the surface friction coefficient of the material will have a greater change, you can use the FPT-F1 friction coefficient / peel tester to determine the temperature and temperature (room temperature -99.9 °C) material movement Friction coefficient.

(4) Automatic sealing performance Sealing, false sealing, sealing, sticking, drawing, etc. should be avoided. The faster the canning speed, the better, otherwise it will affect the appearance of the package and food safety. Before the automatic packaging, a heat sealer should be used to perform necessary tests on the heat sealing temperature, the heat sealing time, and the heat sealing pressure of the heat sealer to improve efficiency and avoid waste.

(5) Ink properties In addition to the general requirements for bonding ink and substrate, the requirements for inks in food packaging films must be able to withstand sterilization and boiling treatment requirements, as well as freeze resistance, heat resistance, etc. No ink peeling or condensation will occur during transportation or storage. Can be tested according to GB7707 (gravure upholstery printed matter) using a printing combination fastness tester.

For food safety, AQSIQ implemented a mandatory product certification management system (ie, 3C certification) for food packaging in 2005. Products produced by the company must be tested before passing on the market. Therefore, the author proposes that for packaging products and food manufacturers, the inspection of food packaging materials must be carried out, and it is more important to select a well-known enterprise specializing in the production of packaging inspection instruments.

Daily necessities that come in contact with food, such as kitchens, household items, food packaging materials, etc., in which harmful chemicals will migrate into the food, which will harm human health. China, the European Union and the United States have introduced laws and regulations to prevent food contact materials from harming the health of consumers. As your product quality assurance partner, PONY Spectrum has conducted comprehensive food-grade contact material testing according to EU/US/Korea requirements.