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Red Polypropylene
Food vacuum packaging and vacuum inflatable flexible packaging applications - vacuum packaging, flex
Vacuum-packed main role is to deoxygenation, to help prevent food spoilage, the principle is relatively simple, due to deterioration of food mold rot caused mainly by microbial activity, and most microorganisms (such as mold and yeast) of survival need oxygen, and vacuum packaging is the use of this principle, the packaging bag and food cells deprived of oxygen, so that micro-organisms to lose "survival of the environment." Experimental results show: when the packing bag of the oxygen concentration 1%, the microbial growth and reproduction rate of the sharp decline in oxygen concentration of 0.5%, the majority of micro-organisms will be inhibited stopped breeding. (Note: Vacuum packaging can not inhibit the enzyme reaction of anaerobic bacteria to multiply and cause food spoilage and discoloration, it needs to integrate with other complementary methods, such as refrigeration, freezing, dehydration, heat sterilization, irradiation sterilization, microwave sterilization, salt pickled, etc..)
Vacuum oxygen removal in addition to inhibit microbial growth and reproduction, the other important function is to prevent food oxidation, due to fats and oils in foods rich in unsaturated fatty acids, the role of oxidation by oxygen to make food than usual, and metamorphic. In addition, the oxide also makes vitamin A and vitamin C loss, food coloring in the role of volatile substances by oxygen, so the color darker. Therefore, deoxygenation can prevent food deterioration, maintaining its color, smell, taste and nutritional value.
Inflatable vacuum packaging vacuum packaging major role in addition to the oxygen removal with durability features, there is also the compressive strength, gas barrier, preservation role, can more effectively make long-term to maintain the original food color, flavor , flavor, shape and nutritional value. In addition, many food not suitable for vacuum packaging, which must be vacuum packed inflatable. Fragile foods such as crisp, easy caking of food, easy deformation of the oil away food, there will be sharply higher hardness of edges, or punctured bags of food. Inflated by vacuum packaging of food, the packaging bag filling pressure is greater than the external atmospheric pressure bag can effectively prevent the food under pressure crushing distortion, does not affect the appearance of bags and printed decoration.
Inflatable packaging in a vacuum and then vacuum filled with nitrogen, carbon dioxide, oxygen single gas or 2? Three kinds of gas mixture. Which is inert nitrogen gas, from the filling, so that bag to maintain positive pressure to prevent outside air into the bag bags, food plays a protective role. Carbon dioxide gas can dissolve in fats or water to form weak carbonic acid, to inhibit mold, bacteria, and corruption activity. Oxygen inhibits the growth of anaerobic bacteria breeding, keeping fruits, vegetables and fresh color, high concentrations of oxygen can maintain its bright red of fresh meat.
Vacuum packaging Cured products: sausage, ham, bacon, duck, etc.; pickled vegetables: mustard, dried radish, turnip, pickles, etc.; bean products: tofu, vegetarian chicken, red bean, etc.; cooked food products: chicken, duck, sauce beef; convenience food: rice, instant wet surface, ready food, etc.; soft canned: Shimizu bamboo shoots, canned fruit, eight-treasure porridge and so on.
Vacuum packed inflatable Tea, nuts, Guazi Ren, dried meat floss, etc.; fried potato chips, puffed food, fruit vegetables, chips, etc.; cakes, moon cake, etc.; all kinds of powder, food additives; a variety of native, rare Chinese herbal medicines; all kinds of dehydrated vegetables.
Vacuum packaging or vacuum packaging used inflatable double or triple composite film made of aluminum thin film composite triangular sealing bags, composite thin film thickness is generally 60? 96 m, among which the inner layers for the sealing, the need for a good seal, thickness in the 50? 80 m between the outer sealing layer, the need for good air tightness and printability, a certain intensity, the thickness of the 10? 16 m between. Common polyethylene film inner layer composite substrate (PE), high temperature cooking bags are used as high temperature polypropylene (CPP), oriented polypropylene outer layer base material used (OPP), polyester (PET), nylon (PA), etc. . Some foods such as tea, milk and some other high-fat food, packed with light resistance, to prevent the impact of food by the light to change color, smell and taste, which is in between the substrate and inner layer of very thin aluminum foil compound (AL), the air tightness has also been strengthened.
Vacuum or vacuum packaging machine used inflatable cavity and the outside pumping two kinds of models. Chamber vacuum packaging machine is divided inflatable vacuum packaging machine and packaging machine. Outside pumping vacuum packing machine has the inflatable packaging and vacuum packaging, and several other functions, so called multi-functional modified atmosphere packaging machine. Buy packaging materials packaging machine according to the shape required, the size of packing capacity, production volume, the manner in which a combination of factors to consider packaging the best consultation before purchasing.
Food vacuum and vacuum inflatable flexible packaging technology, in food packaging technology occupies a definite position, some features and functions can not easily be replaced by other packaging. Our vacuum packaging technology in the early 80s of last century developed, and vacuum packaging technology in the early 90s of last century a small amount of use, with the small package of promotion and development of the supermarket, its scope will be more widely, some will gradually replace rigid packaging, the outlook is promising.
About the Author
I am China Toys Suppliers writer, reports some information about double sided wall clocks , wholesale candle wick.
How to tell capacitors apart?
I have 3 capacitors, but cannot tell which one is which, how do i find out?
I know one is 4700 pfd 50 volts polyester, one is .1 mfd 100 volts polyester, and the last is .0033 mfd 250 volts polypropylene.
One is green, one is dark red, the other is very small and bright blue.
Is there any way to tell them apart? Do i need some kind of instrument, and what would that be if so?
I know the numbers because they came with a schematic and kit
The colors won't help. There's likely a three-digit number that gives the value in (I think) nanofarads, 1e-09 F. They work like resistor color codes: 474 would be 47 x 10^4 nanofarads. Figure it out from there.
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