What are the types of vacuum bags?

I. Classification by Material

1. Polyethylene (PE) Vacuum Bags

   • Made from polyethylene resin, offering moisture-proof, rust-proof, and oxidation-resistant properties.
   • Commonly used for packaging food and pharmaceuticals, with high transparency but relatively soft texture.

2. Polypropylene (PP) Vacuum Bags

   • Made from polypropylene resin, featuring high heat resistance and chemical resistance.
   • Suitable for packaging high-temperature foods and items requiring sterilization, such as cooked meals, meats, etc.

3. Nylon (PA) Vacuum Bags

   • Made from nylon resin, known for high strength and wear resistance.
   • Often used to package items requiring pressure resistance, such as oily foods, meat products, etc.

4. Polyester (PET) Vacuum Bags

   • Made from polyester resin, characterized by an attractive appearance and excellent heat resistance.
   • Ideal for packaging food and daily necessities where visual appeal is important, such as outer layers for steamable packaging.

5. Aluminum Foil Vacuum Bags

   • Composed of aluminum foil laminated with other materials, offering superior barrier properties, heat-sealing performance, and light-blocking capabilities.
   • Relatively expensive but widely used in applications requiring high barrier performance.

II. Classification by Sealing Method

1. Heat-Sealed Vacuum Bags

   • Sealed via heat pressing, ensuring excellent airtightness and resistance to reopening.
   • Lower production efficiency, suitable for scenarios demanding high sealing quality.

2. Evacuation-Sealed Vacuum Bags

   • Sealed by evacuating air from the bag, combining high production efficiency with reliable airtightness.
   • Widely used for packaging various items.

3. Ultrasonic-Sealed Vacuum Bags

   • Sealed using ultrasonic technology, providing strong airtightness and tamper resistance.
   • Higher equipment costs, suitable for specialized sealing requirements.

III. Classification by Application

1. Food Vacuum Bags

   • Primarily used for food packaging and preservation, extending shelf life and maintaining freshness.
   • Examples: cooked food vacuum bags, grain vacuum bags, etc.

2. Electronics Vacuum Bags

   • Designed to protect electronic products from moisture, oxidation, and damage during storage and transportation.
   • Commonly used for packaging electronic components, circuit boards, etc.

3. Specialty Vacuum Bags

   • Includes sterilized vacuum bags for medical use and portable vacuum bags for outdoor travel. These bags feature unique material compositions, sealing methods, and application-specific requirements.