Food vacuum bag should be selected according to product
characteristics, and best vaccum storage bags can be divided into non-barrier vacuum bags, medium-barrier vacuum
bags and high-barrier vacuum bags in terms of barrier properties;
From the functional point of view, it can be divided into low
temperature resistant vacuum bags, high temperature resistant
vacuum bags, puncture resistant vacuum bags, self-standing bags, clear plastic zip lock packaging bags and organ bags. Faced with various packaging materials and
different product characteristics, how to choose suitable vacuum
packaging materials has become a problem that must be solved in
practical production and application. So how do we choose the best bagged vaccum for food?
Because different products have different requirements for
packaging materials, material selection should be made according to
product characteristics, including: deterioration problem, product shape, product surface hardness, storage conditions,
microorganism removal temperature, etc.
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Bagplastics@vip.163.com
1.Vacuum bags are divided into single layer and multi-layer
Ordinary vacuum bags are made of PE single-layer material, which
can be vacuumized, but the damage rate and air leakage rate of
vacuumizing are relatively high, and the cost is low. Many people choose single-layer PE bags as small vaccum seal packages to save costs. Good vacuum bags are made of multi-layer composite
materials, such as nylon /PE. This is a two-layer composite bag,
which is firm and will not leak when vacuumized. At present, most
food packaging bags use multi-layer composite bags as vacuumized
bags.
2. Products with regular shape or soft surface
For products with regular shape or soft surface, such as sausage
products, bean products, etc., it is not necessary to require high
mechanical strength of materials, only the influence of barrier
property and sterilization temperature on materials needs to be
considered. Therefore, plastic vaccum packaging bags with OPA/PE structure are generally used for such products. If high
temperature sterilization (above 100℃) is required, OPA/CPP
structure or PE with high temperature resistance can be used as
heat sealing layer.
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Bagplastics@vip.163.com
3. Products with high surface hardness
Products with flesh and blood have high surface hardness and hard
protrusions, which easily puncture the packaging bag plastic during vacuumizing and transportation. Therefore, the packaging
bags of such products need to have good puncture resistance and
cushioning performance, and vacuum reusable packaging bags made of PET/PA/PE or OPET/OPA/CPP can be selected. If the weight of
the product is less than 500g, we can try to use OPA/OPA/PE
packaging bag, which has good product adaptability and better
vacuumizing effect without changing the shape of the product.
4. Perishable products
Low-temperature meat products, which are easy to deteriorate and
need low-temperature sterilization, do not have high requirements
on the strength of self seal packaging bags, but they require high barrier properties. Therefore, pure
coextruded films such as PA/PE/EVOH/PA/PE films, dry-cured films
such as PA/PE films, and K-coating materials can be used. PVDC shrink bags or dry compound plastic bags vacuum packaging can be used for high temperature products.
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