High temperature vacuum bags, like frozen vacuum bags, are also typical
polyolefin polymers. The two types of vacuum bags have many similarities, such
as non-toxic, odorless, tasteless, and reliable hygiene performance; Resistant
to acid, alkali, salt, and various chemical substances, with stable performance;
Balanced physical and mechanical properties; Excellent moisture resistance and
moisture resistance, with a certain degree of oxygen resistance and oil
resistance; It has excellent formability and good heat sealing performance. Like
high-temperature vacuum bags, high-temperature vacuum bags also have the
advantages of large production capacity, wide sources, and low prices.
The main differences between high-temperature vacuum bags and frozen vacuum
bags are as follows:
① The heat resistance of high-temperature vacuum bags is much better than
that of frozen vacuum bags, and they can withstand high temperatures above 120
℃. High temperature vacuum bag packaged food can even withstand the requirements
of high-temperature cooking above 140 ℃.
② The transparency and strength of high-temperature vacuum bags are also
better than those of frozen vacuum bags. Although the oil resistance of
high-temperature vacuum bags is not ideal, they are better than frozen vacuum
bags.
③ Compared with frozen vacuum bag plastics, the main drawback of
high-temperature vacuum bags is poor cold resistance, and high-temperature
vacuum bag homopolymers may exhibit significant brittleness at 0 ℃.
In summary, there is still a significant difference between high-temperature
vacuum bags and refrigerated vacuum bags. It depends on the packaging
requirements of the product to determine which type of vacuum bag is suitable,
whether it is the most expensive or the best. Only those that are deemed
unsuitable are considered useful.
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