Tel: +86 188 2689 9458
source:other news release time:2022-09-28 Hits:
For example, the three-layer co-extruded layer structure is: PA/AD/PE (PP). Nylon is on the outer layer and is not protected. Nylon has poor impact resistance, is easy to scratch, leaks, and is hydrophilic, easy to absorb moisture, and reduces oxygen permeability.
If it is a five-layer structure, PP (PET)/PE, PA outer/Ad. PA outer/PA, PA outer/Ad, PP/(PE). In this way, the nylon is protected on both sides and prevents the nylon from absorbing moisture.
Seven layers and nine layers have been tested. If various resins are arranged properly, the shelf life can reach more than 1 year, almost reaching the effect of tinplate cans, such as PET/Ad/PA/EVOH/PA/Ad/PE (PP). Oxygen barrier layer that is still in multi-layer film, the functions and functions of each layer are different: According to the storage period of the package, determine the corresponding barrier material (PVDC, EVOH) and layer thickness, the thickness of nylon is generally 20% , EVOH is generally 10%~15%, and the thickness deviation should not exceed 10%. Within this range, the impact on packaging storage is very small.
Adhesive layer (AD): Although nylon and EVOH have good extrusion moldability, they have no ability to bond with other layers (LDPE, PP, EVA) during co-extrusion. Special junction resin must be used as the junction layer to achieve Higher peel strength between layers.
Therefore, the choice of layer material is a very important factor. Appropriate grades should be selected according to the structure, the thickness is generally 5~15g/m2, the inner and outer layers: nylon, EVOH although the oxygen transmission rate is small, but the water vapor transmission rate is very large, therefore, when determining the inner and outer layer materials, should be Fully consider the problem of water vapor barrier, and the inner layer material must take into account the heat sealing performance and heat sealing strength, such as LDPE, MLLDPE, EVA, PPO, etc.;
If necessary, it can be modified with Surlyn, PRIMCOR, POP. When used as a composite substrate, the corona on the outer surface reaches 38~42 dynes.
Read recommendations:
3L 5L Bag-In-Box Wine Dispenser Coffee/ Juice/ Water/ Oil Bag-In-Box With Valve
Wine box packaging customization process and specific production process
Popular recommendation
Custom printed food grade ziplock snack custom plastic pouch packaging food packing bag
125g 250g 500g 1kg Aluminum Foil Flat Bottom Coffee Bean Bags With Valve
Spout pouch
coffee grinds pouches distributors
spout pouches maker
aluminium spout pouch Factory
bag in box sales
clear spout pouch wholesale
spout pouch packaging Vendor
packaging spout pouch manufacturer
The role of the coffee bag
What are the benefits of vacuum rice packaging?
Composite packaging bag
What is the material of PE bag and what type of packaging bag can be made
What are the advantages of plastic packaging bags
Hitting the pain points of gift box packaging directly, three simple points make packaging customiza
How to Select the Material of Food Vacuum Packaging Bag
How to choose pet food packaging bags?
Why are cylindrical bag-in-box so popular?
Can the vacuum bag be reused?
What is the difference between rice vacuum bags and rice woven bags
What are the abilities of composite food bags.food packaging pouch suppliers
Rapid Development of Composite Aluminum Foil Bag Industry
The manufacturer distinguishes between high-temperature vacuum bags and frozen vacuum bags for you.v
Toothpaste packaging bag
Why choose aluminum foil bags for mask packaging bags
The cause of Vacuum Zipper Bag leak.vacuum zipper bags company
Applied Materials of composite packaging bags.juice bag in box
The benefits of loading food with vacuum aluminum foil bags.aluminum foil bags for grilling
Antistatic agents commonly used in plastic packaging bags