Analysis of several important factors and test methods affecting the shelf life of puffed snack food

Puffed leisure food is a new type of food that appeared in the late 1960s Because of its empty and fluffy organizational structure, crisp and sweet taste, it has certain nutritional value and is very popular with people, especially children Due to the special taste of puffed snack food, the requirements of external packaging are relatively high The following are several important factors affecting the shelf life of puffed snack food: 1 The barrier performance of packaging material The packaging form of puffed leisure food is relatively simple, and plastic composite pillow bag is generally used as the packaging of products There are many kinds of plastic composite packaging materials, including plastic plastic composite, paper plastic composite, aluminum plastic composite and so on Through different combinations, it can meet the requirements of different foods for packaging strength, sealing, oxygen resistance, water resistance and light resistance The water and oxygen resistance performance of the expanded leisure food package directly affects the quality of the product in the shelf life Through this test, the problems such as oxidative deterioration, bad taste and mildew caused by the sensitivity to oxygen or water vapor can be solved At present, China's standard is GB / T 1038 for air permeability of packaging materials, which stipulates that the air resistance of packaging materials shall be tested by the principle of differential pressure test; the moisture permeability test standard is GB / T 1037, and the moisture permeability of plastic film, composite film and other materials shall be tested by the principle of weighing test Labthink blue light's vac-v1 differential pressure gas permeameter and W3 / 060 water vapor permeability test system can be selected by the enterprise The instrument strictly complies with the relevant standards The equipment is controlled by computer The test is highly automated, with high test accuracy and stable performance In addition to oxygen, nitrogen, carbon dioxide and other gases, vac-v1 test gas can meet different test needs of customers W3 / 060 water vapor permeability test system 2 The content of headspace gas in the bag Puffed leisure food is fragile In the process of production, transportation and sales, it is necessary to avoid mechanical or external extrusion of products, and such food is susceptible to moisture and oxidation Therefore, puffed leisure food is generally filled with inert gas nitrogen If there is too much oxygen left in the package, it is easy to cause the propagation of microorganisms, which will cause the product to become moldy and deteriorated Class 650 headspace gas analyzer or C650 Portable residual oxygen analyzer can be selected for the detection and analysis of residual oxygen in this package, so as to guide the shelf life of the product Classic 650 headspace gas analyzer C650 Portable residual oxygen analyzer 3 Packaging and sealing performance Puffed snack food is a kind of product which is easy to be damped and oxidized In addition to controlling the barrier performance of packaging materials, it is also necessary to ensure the sealing reliability of the whole package, so as to avoid product pollution and deterioration due to leakage The poor sealing performance mainly comes from the sealing part, so the focus of sealing test should be on whether there is leakage in the sealing part The sealing part may leak due to the insufficient heat sealing performance and sealing strength of the material The test of sealing strength (heat sealing strength) can be completed through the XLW (PC) intelligent electronic tensile testing machine of Labthink blue light The test can be conducted according to the sample preparation of QB / T 2358 standard The instrument is easy to operate and powerful For the detection of the overall tightness of the package, the mfy-01 sealing tester based on the negative pressure principle can be used to place the package bag in the water filled vacuum tank of the mfy-01 sealing tester to vacuum the vacuum tank and generate negative pressure Under the effect of the pressure difference between the inside and outside of the package bag, it can be determined by the way of manual visual inspection If there is continuous bubble, it can be determined as leakage Lssd-01 leakage and sealing strength tester can be selected if it is necessary to quantitatively test the sealing and leakage performance of moon cake packaging bag Mfy-01 sealing tester lssd-01 leakage and sealing strength tester Labthink Languang is committed to helping customers to deal with packaging problems and help the quality and safety of packaging related industries by improving packaging testing technology and developing testing instruments The above are the main factors and detection methods that affect the shelf life of puffed snack food Jinan Languang mechanical and Electrical Technology Co., Ltd hopes to help food manufacturers and packaging material suppliers find out the quality control and solutions of packaging materials.