OxyFree (TM) 504
"OxyFree 504" series products are the alternative names of 504 diabsorber series products ("504" in short), with the common functions of O2 and CO2 scavenging. These products are in general called oxygen absorber (also called oxygen scavenger)
Products of the series are differentiated on:
1. Best application range of Aw, water activity value of targeted subject.
2. Capacity of moisture elimination.
3. Ratio of the absorption capacity of oxygen vs. carbon dioxide.
4. The ability of balancing air pressure in a package during O2 and CO2 scavenging.
With a high ability of eliminating the free-O2, CO2, SO2, H2S and moisture in a sealed container, "504" will achieve a oxygen and carbon dioxide free environment around the sealed foodstuffs or other subjects. Therefore the development of aerobic and anaerobic microorganisms, mold, moth, oxidation, rancidity, discoloration, and corrosion will be prevented. Food freshness, original taste and flavor, original nutrition and the original quality will be well preserved.
The benefit of the application of "504" will extend food shelf-life, make it possible to adopt a cost-saving packaging or/and transportation method of foodstuffs, and may help the expand into new markets for the applied food. If applied in non-food goods, it can prolong the preservation period of films, instruments, clothing, antique, etc.
||Nominal oxygen capacity (ml)
||Nominal air capacity (ml)
||Dimension of absorber packet (mm)
||Number per Casing Package
504A, 504B, 504C, and 504E are readily available. 504D, the adjustable formula on O2/CO2 capacity ratio, will be customized based on the customer's specification.
1.The choice of which specification of "504" to order depends on the oxygen volume of the free space (the space not occupied by the food/goods) in a container or package. And O2 counts roughly one fifth of air volume. For example, if the
free space of air is 500 ml, it contains 100 ml of O2. Therefore a Sxj-100 "504" packet will be proper to apply.
2. The formula for a preliminary estimation of oxygen volume in a container: Oxygen volume (ml) = (container volume (ml) - contained foodstuff/goods volume (ml)) x 20% =~ (Length(cm)xWidth(cm)xHeigth(cm)-Weight of food/goods (g))x20%
Effects of O2, CO2, Aw upon the Preservation of Foodstuffs
O2 is one key element for the survival of aerobe and the source causing oxidative deterioration. Without oxygen, foodstuff won't be oxidized, fungi and other bacteria won't grow, and moth can not survive.
CO2 is a vitally important factor for the growth of yeast and other anaerobia, which could be one major reason causing the foodstuff deterioration in a oxygen-free environment. The growth of yeast and other anaerobia stimulated by the presence of CO2 and O2-free condition will speed up the foodstuff deterioration. In the case of preserving high moisture and oily Chinese moon cake, the elimination of O2 and CO2 is very critical.
Water Activity, Aw, is also an important factor of affecting the growth of microbe. It is also a major concern in the food preservation, especially in the aspect of mold prevention.