Referring to the assessments, pet meals producers can use excessive barrier materials as an alternative of more extra of preservatives to prolong pet food shelf life. We suggest choosing laminated plastic, aluminum-plastic materials and metallic supplies as pet food packages, because all these materials have a good barrier properties to oxygen and water vapor. Moreover consideration of oxygen and water vapor permeation properties of materials, we must always know that the surroundings also have some impacts on these properties of supplies. Resembling EVOH and PA, they’re very sensitive about humidity. In Room temperature and relative lower humidity, both of them have a great barrier to water vapor, while in high humidity environment, their water vapor permeability would decrease. So if there may be high humidity environment throughout pet food supply and upkeep, EVOH and PA should not suitable for packaging.
Food preservatives are classified as: Natural Preservatives corresponding to salt, sugar, vinegar, syrup, spices, honey and edible oil; and Chemical Preservatives similar to benzoates, sorbates, nitrites and nitrates of sodium or potassium, sulfites, glutamates, glycerides and the like. Synthetic preservatives may be produced more economically, nonetheless, have worse unintended effects on pet food than pure preservatives. Increasingly more strict laws … Read More