After you’ve chosen the right bag type, how to choose the right material? Next, I will break down several commonly used materials for packaging bags for you, so that you can understand the material characteristics and correctly choose the material suitable for your product.
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Different Film |
Material Name |
Thickness |
Characteristic |
Application Scenarios |
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Surface Printing Film |
PET |
12 microns (can be customized) |
Transparent, bright film, not adhesive.Advantage: It has good air tightness, excellent heat resistance and cold resistance.Disadvantage: Not resistant to strong alkali and prone to static electricity. | It can be used for various foods, medicines, cosmetics, daily necessities, and can also be used for packaging in other fields such as industry, agriculture, etc. |
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BOPP |
18 microns |
transparent film，Higher density than PET. Advantage: Colorless and odorlessDisadvantage: It has poor heat seal ability and is difficult to seal when used independently.
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Widely used in packaging of various light foods such as instant noodles, fried foods, potato chips, snacks, etc |
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MOPP |
18 microns |
matte, frosted.Moisture-proof, moisture-blocking. | Widely used in packaging of food, medicine, daily necessities, etc. |
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PA |
15 microns |
Colorless, transparent filmWear-resistant, tough, chemical-resistant, heat-resistant, cold-resistant, easy to shape, non-toxic, and easy to dye. | Applied to products that require vacuuming, such as rice, meat, etc. It can also be used as a reinforcing material for high-temperature cooking products and liquid packaging bags. |
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Intermediate Layer Composite Film (Strengthen the bag’s barrier, moisture-proof and other functions.) |
VMPET |
12 microns |
Good shading and moisture-proof effect.The base material is PET, and aluminum vapor is sprayed on the PET film. | Used in biscuits, snacks, nut powders and other products that do not have particularly high environmental requirements. |
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AL |
7 microns (custom 9 microns) |
Non-toxic and odorless.Shading, moisture-proof and oxygen-proof. It has good barrier properties, high temperature resistance, low temperature resistance, oil resistance and softness. | It is mostly used in meat products, juices, beverages and other products that have strict packaging requirements. |
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Inner Heat Sealing Film (Thickness is determined by the total thickness of the bag.) |
PE |
Custom |
Colorless, transparent, odorless.With good heat seal ability. Different colors can be customized. | Bags for high temperature sterilization not exceeding 100 degrees Celsius.Single-layer PE is mostly used in garbage bags, shopping bags, handbags, etc. |
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CPP |
Custom |
high transparency , good heat resistance.Good moisture and odor barrier properties, no need to package liquids, and no need for sterilization. | No temperature requirementsIt is mostly used for packaging and outer packaging of light products such as food and commodities. |
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RCPP |
Custom |
Good heat resistance, acid resistance, alkali resistance, and excellent grease resistance. |
Bags for high temperatures can meet the sterilization treatment of 100-135℃. Used for hot filling, retort bags, aseptic packaging, etc.
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