What are the types and uses of composite vacuum bags

Composite vacuum bags combine plastic films or other materials with different characteristics through specific processing techniques to form packaging bags with multi-layer structures. This multi-layer structure not only enhances the physical strength of the packaging bag, but also significantly improves its airtightness, effectively preventing moisture evaporation and bacterial invasion of the packaging contents.

Composite vacuum bags can be classified into various types based on their material combinations and uses. Here are some common types of composite vacuum bags and their uses:

1、 Common types

Polyester/polyethylene composite vacuum bag

Material: The outer layer is made of polyester (PET), and the inner layer is made of polyethylene (PE).

Characteristics: The outer layer of PET provides excellent mechanical strength and wear resistance; The inner PE ensures good heat sealing and barrier properties.

Usage: Widely used in food packaging, it can extend the shelf life of food, maintain the freshness and taste of food.

Nylon/polyethylene composite vacuum bag

Material: The outer layer is made of nylon (PA), and the inner layer is made of polyethylene (PE).

Characteristics: The nylon outer layer has excellent tensile strength and puncture resistance, which can effectively protect the safety of food during transportation and storage; The PE inner layer provides excellent heat sealing and barrier properties.

Usage: Suitable for products that require high packaging strength, such as meat, seafood, etc.

Aluminum foil composite vacuum bag

Material: A layer of aluminum foil is added between the inner and outer layers.

Characteristics: Aluminum foil can isolate light and oxygen, and has high barrier properties.

Usage: Especially suitable for food packaging that is sensitive to light and oxygen, such as meat, seafood, cheese, etc.

High temperature steaming vacuum bag

Material: Polyester or nylon materials are usually used and specially treated to improve their thermal stability and cooking resistance.

Characteristic: Able to maintain its shape and performance during high-temperature cooking process.

Usage: Suitable for food packaging that requires high-temperature treatment, such as cooked food, canned food, etc.

Paper/plastic composite vacuum bag

Material: Composed of paper and plastic film.

Characteristics: It has good barrier and temperature resistance, as well as good environmental friendliness.

Usage: Suitable for products that require environmentally friendly packaging, such as food, medicine, etc.

2、 Usage Overview

Composite vacuum bags have a wide range of applications, mainly reflected in the following aspects:

Food preservation: By isolating oxygen and moisture, the shelf life of food is extended, and the freshness and taste of food are maintained.

Product protection: Effectively prevent physical damage and microbial contamination of products during transportation and storage.

Aesthetic display: By printing patterns and text, the aesthetics and practicality of the packaging are increased, enhancing the market competitiveness of the product.

Environmental Protection Needs: With the increasing awareness of environmental protection, more and more composite vacuum bags are being made of biodegradable or recycled materials to meet environmental protection needs.

In summary, there are various types of composite vacuum bags, each with its own material combination and characteristics, suitable for different packaging needs. When selecting composite vacuum bags, it is necessary to choose according to the characteristics and requirements of the product to ensure the packaging effect.