Q:Do vacuum packing bags have to be vacuum packed?

To be exact, vacuum packing bags must have vacuum packaging machines to complete vacuum packaging. If you want to use vacuum packaging bags for non vacuum packaging (i.e. ordinary packing), you can also use them.

Q:What are the packaging forms of fresh milk?

UHT milk, also known as UHT milk, is mainly made of composite plastic bags or paper plastic composite packaging, with pillow, brick and other forms. Because this material has good barrier properties, and can achieve the aseptic condition, filling in aseptic conditions, product shelf life of up to more than 30 days, with sales, storage, convenient carrying and drinking, long-distance transportation and other advantages, but the packaging of high cost, high price.

Q:Three layer coextrusion material for packaging bags

Five layer co extruded films composed of outer layer of multi ester copolymer, high mechanical strength, the second layer is ethylene methacrylate polymer, the third layer is the fourth layer of polyethylene, polyethylene, the inner layer is modified with ethylene propylene polymer. Five layer co extruded films performance of each layer as outer layer: providing excellent heat sealing and protection, good printing performance; the second layer is connected with the outer layer and third layer; third layer: providing vapor barrier and softness; fourth layer: connection layer and the third layer; inner layer: non-toxic, with compatibility infusion product good, excellent heat sealing and buffering external impact.

Q:How to evaluate the quality of a food packaging bag design? From what angle?

Successful packaging must be consistent with the product positioning. Today's consumer groups are very different, for example, the elderly and young people on the acceptance of packaging design is very different, but also take moon cake as an example. The elderly may accept the traditional form of packaging (including graphic design, packaging design, structure design and so on) but the young people can accept the moon cake in the cake box, packed in ice cream box, metal box or even installed in the heavy metal in the punk style. You can't imagine an old lady in the supermarket, with a picture of a skull box filled with 8 pieces of moon cakes.

Q:The vacuum packing bag is sealed. How can I open the zipper?

The simplest and most effective way is to apply a layer of wax to the surface of the zipper, and use the lubrication of the wax to achieve a smooth effect. With a candle on the surface of the zipper back and forth after wiping, and then from the bottom of the repeated several times, the zipper will be smooth.

Q:What about the table of nutrition values on food packages?

Total fatThis is in total fat as a unit, high fat food generally high calories. The lower the fat content, the healthier the food. As a rule, choose as much as 100 grams of food with less than 10 grams of fat. saturated fatSaturated fats are found in meats, poultry, fish, baked goods and tropical oils. They increase the risk of heart disease. Foods with the lowest levels of saturated fat should be selected. It should also be noted that in some food labels, trans fats - - for the heart, trans fats are more dangerous than saturated fats. Total CarbohydrateThis is the total number of carbohydrates per serving, in grams. It contains sugars and slow digestion carbohydrates. You may also see information about the glycemic index (GI). Compared with high GI foods, GI's blood sugar levels increase more slowly after lower food intake. sugarThese include natural sugars and added sugars, which are listed individually as part of the total carbohydrate component. In general, it is better to choose foods with lower sugar content. sodiumProcessed foods may have a large amount of sodium. If possible, choose foods with lower sodium content, that is, less than 400 milligrams per 100 grams of sodium. Other food information

Q:The difference between a vacuum and a vacuum in a food package

So, the difference is very clear, is the vacuum packaging bag of the air as much as possible out, but the inflation is the air in the bag is replaced by nitrogen or carbon dioxide and other inert gases, the purpose is as far as possible to reduce food and air contact oxidation process, slow food, avoid food rapid deterioration.

Q:What material is the surface of the packing bag such as instant noodles, pickled mustard tuber, small bread and so on? Why should we add this layer?

Aluminum filmThe first consideration of food packaging is the barrier properties of packaging materialsBecause barrier property is good, the preservation time is long, the shelf life is long, the quality can guarantee betterAt present, all food packaging materials, aluminum foil barrier is the best (followed by some high polymer plastics, like EVOH, PVDC, etc.)Therefore, the most common, always in the middle of two layers of plastic film, a layer of aluminum foil, to improve barrier,But why not use aluminum foil packaging alone, but also two or more layers of plastic film?,

Q:Can the meat with plastic packing bag be pressed directly with a pressure cooker?

Health performance indicators have two senses, toluene amine, evaporation residue (4% acetic acid), evaporation residue (n-hexane), evaporation residue (65% ethanol), Potassium Permanganate (water consumption), heavy metals (as Pb), decolorization, solvent residue, sterilization indicator.

Q:What's the packing of the air in the food package?

For example, our common bag of potato chips, which is mostly nitrogen N2, a gas filling packaging is fat, on the one hand is the replacement of the original air bag and prolong the shelf life; on the one hand, there is a large amount of gas support chips during transportation and storage, can also be to reduce the impact of fragmentation. You certainly don't want to buy potato chips all over it.