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Food Flexible Packaging Safety Analysis

12/17/2011 5:03:39 PM  Read: 1000

Food packaging materials are mainly made of polyethylene, polypropylene, polyester, polyamide and other polymer materials. These packaging materials, because of their molecular structure and the forming process and the performance of different additives added a larger difference. Therefore, choose a product's packaging materials for enterprises is particularly important, otherwise prone to food safety. For example, barrier materials, poor, it will shorten the shelf life of liquid milk; Without the proper amount of ventilation and can not guarantee fresh vegetables. In order to maintain circulation and health and safety of fresh food available to consumers, must be carried out safety checks on food packaging. Performance requirements on food packaging are the following aspects.
(1) barrier properties of the gas barrier property, including the barrier and moisture barrier. Food deterioration over the barrier properties due to inappropriate packaging materials. According to different contents, shelf life, storage conditions, selection of suitable barrier materials. End of 2005, introduced in GB? 19741-2005 (liquid food packaging plastic composite film, packaging bags standard) on the proposed barrier packaging film with GB/T1038 (plastic film permeability test method) and GB/T1037 (plastic film and sheet water vapor permeability test methods) for testing.
(2) Tensile properties of the transport process requires the packaging film must have sufficient tensile strength. For the composite film should ensure that the film is not between the layers, which requires a higher composite film peel strength to prevent delamination. Optional intelligent electronic tensile machine according to GB / T? 13022 (tensile properties of plastic film) on the tensile properties and peel performance control.
(3) film smoothness films should have good smoothness to ensure the smooth conduct of high-speed packaging, should be based on GB? 10006 (coefficient of friction of plastic film and sheeting determination) determination, the general requirements of the dynamic friction coefficient of films between 0.2 ~ 0.4. Here should be particularly noted that with increasing temperature, the material will be considerable changes in surface friction coefficient can be used FPT-F1 Friction coefficient / peel test machine to measure the very temperatures (room temperature -99.9 ℃) movement of materials coefficient of friction.
(4) The sealing performance of automatic packaging to be sealed to avoid leakage, virtual seal, seal leakage, sticky head, drawing such a situation, and requires canned faster, the better, otherwise it will affect the appearance and packaging of food safety, which requires Before carrying out automatic packaging apparatus should be used to seal the sealing temperature of the heat sealing machine, sealing time, sealing pressure of the necessary tests to confirm, increase efficiency and avoid waste.
(5) food packaging film printing ink performance requirements of the ink and substrate addition to the general binding force, wear resistance, but also resistant to sterilization and boiling treatment requirements, and freezing tolerance, heat resistance, in order to ensure Transport, storage does not occur during the ink off, condensation and other phenomena. According to GB? 7707 (intaglio decoration print) the use of combination printing fastness testing machine for testing. AQSIQ introduced in 2005 on food packaging mandatory product certification management system (ie, 3C certification), the product must pass quality inspection before the market. Therefore, choose a professional manufacturer of packaging testing instruments in the well-known enterprises is particularly important.

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