For the coffee bag, we have talked about the purchase precautions, classification, printing, etc., so we have not made some explanations about the material of the coffee bag. This article will tell you what the main materials of the coffee bag are used for food. 

1. Low temperature PE material, high temperature suitable for RCPP, such as high temperature cooking bags.
2. If you need to increase the puncture resistance, you can choose PA material. increase physical strength
3. If you need to avoid light, choose AL aluminum foil material or aluminum plating to improve the barrier performance.
4. To increase the mechanical strength, PET material is preferred for stiffness.
5. Water-resistant high-barrier coating PVA.

At present, the most used coffee bags are mainly film materials, and of course, bottles and cans are also used. For the film material used in the coffee bag, it is necessary to ensure that the packaging effect, beauty and economy of various foods are in the best state. At the same time, coffee bags also have higher requirements on the light blocking and stability of materials. When these requirements cannot be met with a single material, the package is often composed of a combination of different materials. According to the combination of the above materials, what properties the product needs can be customized according to its requirements. Generally, vacuum coffee bags are compounded, and common types of coffee bags are:

Two-layer composite: PA/PE or PA/RCPP; PET/PE or PET/RCPP
Three-layer composite material: PET/PA/PE; PET/AL/RCPP; PA/AL/RCPP
Four-layer composite material: PET/PA/ AL/RCPP

The bag type of vacuum coffee bag can be customized according to customer requirements. Common bag types include three-side sealing, middle sealing organ, side sealing, stand-up bag, etc.