cooking bags, soft can of cooked meat products, packaging technology research, with soft packaging as a meat canned food packaging material, because of its convenient, room temperature storage characteristics, applied more and more widely, deeply loved by the people.

In the flexible packaging in a representative is compounded by three layers of materials of retort pouch -- aluminum foil bag, the outer layer of material is a polyester film, intermediate material of aluminum foil, the inner layer material of polypropylene film, interlayer by means of adhesive composite processing as one. The outer layer of the polyester film can provide excellent toughness, durability and printing; middle foil has a good light, breathable, waterproof property, but also keep the cooking bag stability key; and the inner layer of the polypropylene film has excellent heat sealing performance.The processing technology of canned meat in general : raw material pretreatment →→→→bagging pre-sealed exhaust seal, sterilization, cooling, insulation inspection to finished product. This process relates to a variety of technical cooperation and parameter settings, the operation is scientific directly affects the canned meat packing effect and the quality of the finished product. The next Labthink blue light on canned meat flexible packaging -- vacuum aluminum foil bag of common quality problems of simple analysis, and provide the corresponding detection method, with a view to relevant enterprises to help.

A common problem: shelf life is not over, but expanding bag packaging, product deterioration

Shortly before a television news also once exposed, a brand of cooked meat products shelf life is not over, vacuum packaging is bulging like a rubber ball, which products have been modified, not edible. Consumption have complaints, requirement manufacturer returns to give compensation. Investigate its reason, can be summarized into the following two points:

In 1, the whole packaging sealing problems. Packaging is the main role to protect the contents of that product safety. Canned meat flexible packaging mainly adopts vacuum packaging forms, if the packaging the integral sealing performance is not ideal, the gas ( mainly refers to the oxygen ), water vapor will leak into the interior of the package through, causing problems such as the packaging bag expansion, product will be the result of oxygen, water vapor into the damp, metamorphism, effect of edible, not sales. To solve the sealing problem of packaging, enterprise can adopt a sealing test instrument on the overall packaging detection. The market is the most commonly used method of testing principle of negative pressure seal test instrument, with Labthink Portland light production MFY-01sealing test instrument as an example, using the vacuum principle, according to the national standard in -30kpa, -50kpa, -70kpa, -90kpa for 0.5 minutes, for vacuum packaging is mainly observed in test samples after recovery. Of course, the method is the use of visual method principle, is a qualitative test method for quantitative detection of dairy products, plastic packaging cup sealing and leakage performance, you can use the positive pressure method sealing performance test equipment, such as Labthink blue light LSSD-01leakage and seal strength tester.

2, packing heat sealing performance is not ideal, sealing strength. Seal strength also called heat seal strength, is the evaluation of the food packaging heat sealing parts sealing strength is important index analysis. Heat sealing strength is insufficient, will cause the packing sealing in the heat of open, resulting in sealed packages of food is not good, leakage or pollution. Heat sealing performance can be detected using Labthink blue light HST-H3heat sealing tester to simulate the line heat seal process, and then through the sealed heat seal strength testing to determine the thermal sealing process applicability, to get the best heat seal parameters. Seal strength detection directly with XLW series of intelligent electronic tensile testing machine can finish the test, at the same time, the apparatus also has a tear strength, peeling strength and other functions, can be used for packing the resistance to tearing, peeling performance detection project, enterprises can meet the packaging a number of indicators monitoring control.

FAQ two: shelf life is not over, packaging intact, deterioration of product

With the consumer complaints reflect, the shelf life of food has not been, packaging is intact, why open the packaging, but find that the food has peculiar smell, bad? Although this condition appears a few times, but does require manufacturers to increase alertness. The emergence of this situation is mainly due to canned meat vacuum packaging barrier properties are not ideal and lead.

Food packaging barrier property testing consists of oxygen, water vapor detection. Meat food containing large amounts of animal fats, oxygen even in low temperature conditions are easy to happen, not only to lose the nutritional value of food but also prone to smell, metamorphic; water vapor can promote the reproduction of microorganisms, fuel oil oxidation and decomposition, prompting browning reflect and oxide pigment; on the other hand, moisture content some microorganisms have occurred some physical changes, such as some food from happening to crystallization, make food dry hardening or lump. If vacuum packaging oxygen resistance, water resistance performance is not ideal, oxygen, water vapor penetration on the packaging of the food produces an effect, finally will affect sales, brought to the enterprise the economic loss.

According to the packaging material permeability test, also have the relevant standards, oxygen resistance, water resistance test can be respectively according to GB1038, GB 1037standard test. Labthink blue light VAC series pressure difference gas permeameter standard GB 1037, using the pressure difference test principle, can be used for testing and packaging materials for oxygen, carbon dioxide, nitrogen gas barrier properties. Water vapor barrier property testing may use Labthink blue light W3/060 water vapor permeability test system test. Equipment used computer control, test process automation, instrument can be used in temperature and humidity control settings, can meet the needs of the business of packaging in the different environment quality monitoring and control.