Vaccum Bag

What materials are the vacuum food sealing bags used mainly made of? Do these materials have good oxygen, water vapor and odor barrier capabilities?

The vacuum food sealing bags produced by Changxi Packaging Technology (Yixing) Co., Ltd. mainly use a variety of high-performance materials including PBOPA (polyamide/polyethylene co-extruded film), ALU (aluminum foil), CPP (cast polypropylene), BOPP (biaxially oriented polypropylene), PE (polyethylene), PET (polyethylene terephthalate) and PVDC (polyvinylidene chloride). These materials are selected based on their unique physical and chemical properties and precise matching with food packaging needs.
PBOPA: Combining the high strength and good barrier properties of polyamide (PA) with the flexibility and processability of polyethylene (PE), it is particularly suitable for packaging that requires high barrier properties and effectively blocks the penetration of oxygen, water vapor and odor.
ALU (aluminum foil): Known for its excellent insulation properties, it can completely block the penetration of light, oxygen, water vapor and most gases, and is an ideal choice for keeping food fresh and extending its shelf life.
CPP: It has good heat sealing and transparency, and also has certain barrier properties. It is often used in multi-layer composite structures to enhance the sealing and mechanical strength of the overall packaging.
BOPP: Due to its high transparency, glossiness and good mechanical strength, it is often used in packaging that needs to display the appearance of the product, and also has certain water vapor barrier capabilities.
PE: Polyethylene is widely used in food packaging because of its non-toxicity, odorlessness, excellent low temperature resistance and low cost, especially as the inner layer or sealing layer in a multi-layer structure, providing good flexibility and heat sealing.
PET: It has high mechanical strength, transparency and heat resistance, has good barrier effect on oxygen and water vapor, and is one of the commonly used materials for making vacuum bags.
PVDC: Polyvinylidene chloride has extremely high barrier properties, especially for oxygen, water vapor and various gases and odors, and is the preferred material for high-end food packaging.
Among the above materials, PE and PP are important components of vacuum bags. Although their barrier properties have their own characteristics, Changxi Packaging Technology focuses more on using high-performance composite materials, such as PBOPA, PET/PE or PET/RCPP (RCPP is modified polypropylene, which improves the heat sealing performance of polypropylene) to achieve the best barrier effect.
Oxygen barrier: Materials such as PBOPA, ALU and PVDC can effectively prevent oxygen from entering the packaging, slow down the oxidation process of food, and extend the shelf life.
Water vapor barrier: Materials such as ALU, PET and PVDC have particularly outstanding barrier properties to water vapor, which can effectively prevent food from drying due to water loss or deteriorating due to excessive humidity.
Odor barrier: High-quality composite materials such as PBOPA and PVDC can effectively isolate the contamination of food by external odors and maintain the original flavor of food.
Changxi Packaging Technology (Yixing) Co., Ltd. not only strives for excellence in material selection, but also reflects its professional advantages in production processes and quality control:
Strict supplier screening and testing: The company strictly implements the screening and review of raw material suppliers to ensure that all materials meet food safety standards. Through incoming material testing and comparison, we ensure that the performance of each batch of materials is stable and consistent.
Advanced production technology and process control: Through fine production process design and strict process control, each batch of products can achieve a high degree of stability and traceability, ensuring the consistency and reliability of product quality.
Efficient supply chain and logistics system: The company has sufficient production capacity and a stable supply of raw materials. Combined with a complete ERP system and an efficient operation mechanism, it ensures a quick response from ordering to delivery, which can usually be delivered within 7 days.
Seamless after-sales service: Changxi Packaging has an after-sales service team composed of technical backbones, providing 24-hour tracking service. By regularly visiting customers, collecting feedback, solving customer problems in a timely manner, and establishing a customer file system, we ensure efficient and thoughtful after-sales service.