A common mistake of flavoring packaging

The production and application of the seasoning bags there is misunderstanding. Such as some of the soft bag factory to the customer production condiment packaging material is not correct or the unreasonable phenomenon of composite material combination, causes the customer complaints, and customer may distrust from now on all the soft bag factory quality level. In order to avoid the occurrence of similar situations, summarizes the food plastic flexible packaging production of five big mistake, give you to reference. 1, polyethylene film for vegetable oils containing Fried food or vegetable oil seasoning bags (PE Polyethylene) Plastic film in the actual flow delay or attenuation, in order to enhance or complementary film performance, high-pressure polyethylene, low-pressure polyethylene and linear polyethylene are mixed in proportion. Although the PE ( Polyethylene) Fresh keeping film breathable performance is good, but, after contact with vegetable oil, PE will permeate, swelling, discoloration, such as food packaging contain vegetable oil, not only can greatly shorten the shelf life of food, and long-term exposure to vegetable oil, PE ( Polyethylene) Within the film & other; Naphthalene & throughout; Will precipitate dissolve in vegetable oil, harmful to human body health, so the PE film should not be used for packaging Fried foods and foods that contain vegetable oil, unfavorable also package contains oil seeds, dried fruit, seeds, nuts, seeds and other food. 2, the following five layers co-extrusion PE plastic film is unfavorable make dairy condiment packaging co-extrusion PE ( Polyethylene) Plastic film packaging, the current market popular milk packaging, dairy, soy sauce, vinegar, packing and so on is a typical co-extrusion plastic film packaging. Transparent no printing or cooking bags, vacuum and co-extrusion plastic film packaging. Within the current milk packaging outside although the white black black and white co-extrusion plastic film, to be extended shelf-life. But if you are using three-layer co-extrusion plastic film, in the absence of barrier layer, and therefore rarely achieve the shelf-life marked on the package. With EVOH ( Ethylene/vinyl alcohol copolymer) The five layers of barrier layer co-extrusion and coating PVA ( Polyvinyl alcohol) Cut off the plastic film layer, can prolong shelf-life but higher cost. 3, the plastic flexible packaging of vacuum aluminum plating film cannot replace Al metal foil Al metal aluminum foil with shiny metal luster, non-toxic, tasteless, shading sex is wonderful, reflective rate can reach 95%, high and low temperature stable state, in the 73 - 371 ℃ range shrinkage deformation does not go up; Oxygen barrier property is good, the air resistance, the resistance, the wet resistance, fragrant, is a high-grade packaging excellent middle base film; More high-grade packaging and blister packaging for medicines, the high-grade packaging of chocolate, li riceses leave flap sealing membrane, milk and milk products, juice of paper/aluminum/plastic composite packaging, food and condiment of high-grade perfume packaging, cooked meat, reasonable, such as roast duck cooking packaging moistureproof, integrated circuit board, anti-static packaging, etc. Aluminized plastic film although good mechanical performance, aluminum plating with smooth surface brightness, difficult to produce pinhole, adornment sex is strong, have certain resistance, avoid light, and the effect of shielding gas, can be complementary and rolling aluminum foil, low intensity, easy to tear, folding, easy to fracture, easy to produce pinhole, not the shortcoming of acid and alkali resistance, but the vacuum aluminum plating aluminum layer of plastic film water resistance is poor, in wet fall out, take off the aluminium composite bags open layer. In addition, the aluminum layer is too thin, that is to say 50000 m2 of plastic film plating need only 1 kg of high purity aluminum, the shading and shielding performance is far lower than the rolling aluminum foil ( Pure metal foil) , so the aluminum plating film on the base material of plastic composite packaging use no substitute for rolling aluminum foil. 4、宠物( Polyester) Film does not take the place of PA ( Nylon) Film as cooking packaging cooking function is through the high temperature of cooking the food within the packaging of the bacteria killing, and prolong the shelf-life of food; Only through conduct heat to the packaging of food packaging, will kill fungus throughout the food. PA（ Nylon) Thin film of water vapor transmittance is very high, metal foil is a good heat conductor. And has excellent performance and good insulation resistance capability of the PET ( Polyester) Thin film thermal conductivity is not good, the water vapor transmission rate is very low, can prevent part or reduce the cooking temperature of import; In addition, PET ( Polyester) Hardness, the high stiffness of the film itself, is not easy to exhaust the air, although there is a good barrier property, but weakened the cooking sterilization effect, so the PET ( Polyester) Do vacuum packing film only appropriate, cannot make cooking packaging. 5, paper-plastic composite film packaging environmental paper-plastic composite film packaging are not paper and plastic composite packaging, usually adopt paper stretch film, PE Polyethylene) And PP ( Polypropylene) Composite processing technology of compound and into, In dry compound way processing cost is higher) 。 Paper-plastic packaging than the permeability of plastic packaging is good, water proofing property and barrier property is poor, so often used in packing and hygroscopic items needed to be released, such as the inner packing of camphor, moistureproof agent ( Desiccant) Such as packaging. Paper is only can be heat sealing compound after the plastic bag, but in poor after composite plastic recycling or natural decomposition, in addition, the paper making raw material is wood, extensive use of the waste is also a kind of natural resources. As a result, some people think/paper-plastic packaging is plastic packaging environmental protection is not reasonable.
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