With the development of our economy, tourism boom, golden week economic rise, people's demand for convenient food more and more. All kinds of soft can and high temperature cooking food demand is huge, a large number of high barrier, high impact, high temperature cooking resistance, high pressure resistance, medium resistance of food packaging products emerge at the historic moment, thus ensuring the convenience of food and nutritional value, extend the shelf life of convenient food, is the best packaging materials for soft can.
Many food manufacturers say that they know that high temperature cooking bags are useful, but they are not very clear about the material/layer number. Today, giant packaging will answer for you.
High temperature cooking bag is a kind of composite plastic film bag can be heated, it has the advantages of cans and containers and plastic bags resistant to boiling water, high temperature cooking bag literally you can understand by word, is placed on the pot high temperature cooking, but the cooking temperature should be controlled within 135°c, 121°c, cooking time to 30-40 is the best, The commonly used materials are generally Ninon NY composite cooking grade CPP, also known as RCPP, and Ninon NY composite pure aluminum AL composite cooking grade CPP, also known as RCPP.
The main raw materials are: PET(mainly B0PET), PA(mainly B0PA), PP(mainly RCPP and SCPP), A L(mainly aluminum foil), co-extruded PA film, co-extruded EPVDC coating film, etc. The basic processing structure of high temperature cooking bag. According to the user's requirements, the type of contents and the form of circulation, the product structure of high temperature cooking bag is generally divided into three categories: two layer film, three layer film and four layer film structure. BOPA/CPP, PET/RCPP; The three-layer membrane structure is PET/AL/RCPP, BOPA/AL/RCPP.
Ordinary vacuum bag is made of single-layer material, which can be vacuumed, but the damage rate and air leakage rate are relatively high, but the cost is relatively low. In order to reduce the cost, many businesses will choose single-layer material bags as vacuum bags. There is another kind of double layer composite material, such material is relatively strong, and as a vacuum packaging will not leak, so, this kind of double layer material made of vacuum bag is relatively good. Three layers of aluminum foil bags are slightly better sealed/pierced, and of course they cost more.
High temperature cooking bag is usually stored at room temperature, requiring a long storage period, shelf life is generally more than one year, so there are higher requirements for its packaging composite quality.
(1) Appearance smooth and good, no wrinkle, bubble and foreign body attachment;
(2) non-toxic, odorless, residual solvent determination value less than 5mg/㎡;
(3) completely sealed, water vapor transmittance is close to zero, for three layers, four layers of structure is not more than 0.5g/㎡ 24h;
(4) light shading, no gas permeability. PET/CPP ordinary bag requirements are slightly lower, oxygen permeability is not more than 120cm/㎡·24h·atm, three-layer, four-layer structure 0.5cm/㎡·24h ·atm;
(5) no leakage, good oil resistance, oil absorption rate is not more than 1%;
(6) Excellent heat resistance and pressure resistance, after 121 ℃, 40 minutes of high temperature cooking requirements without deformation, no peeling.
At the same time, considering the use of high-temperature cooking bag environment, printing ink also needs to use high-temperature ink.
First of all, the selection of ink linking material (to ensure the stability of the linking material under high temperature cooking temperature); The second is the selection of ink colorant (to ensure stability at high temperature cooking temperature); The third is the selection of ink curing agent (the use of two-component ink should pay attention to the selection of curing agent).
Pay attention to the difference: ordinary cooking ink; High temperature cooking ink; Super high temperature cooking ink. But also pay attention to the problem of ink color, two-component residual ink and new curing agent, curing agent when excessive inch scratch decline.
