Vacuum Plastic Bag

Vacuum Plastic Bag – Everything You Need to Know

When it comes to food packaging, few solutions are as reliable and versatile as the vacuum plastic bag. Designed to extend shelf life, preserve freshness, and protect contents from moisture and air exposure, vacuum bags are a must-have in both household kitchens and commercial food processing industries.

In this article, we’ll walk you through the key aspects of vacuum plastic bags: the materials used, how they differ from regular LDPE or HDPE bags, their structure, standard sizes, uses, safety for food contact and microwave use, and where to import high-quality vacuum bags in Vietnam.

vacuum bag

What is a Vacuum Plastic Bag Made Of?

Unlike regular plastic bags made from HDPE (High-Density Polyethylene) or LDPE (Low-Density Polyethylene), vacuum plastic bags are made from a combination of PA (Nylon) and PE (Polyethylene) layers. This special blend gives vacuum bags their unique barrier properties, combining flexibility with durability and airtight performance.

• PA (Nylon): Provides excellent oxygen and aroma barrier. It’s strong and puncture-resistant, ideal for vacuum sealing where air must be completely removed.

• PE (Polyethylene): Offers a good seal, moisture resistance, and food safety. It’s the layer that typically comes in contact with the product.

Compared to HDPE and LDPE bags, which are commonly used for general packaging (e.g., shopping bags or garbage liners), vacuum bags have a much higher barrier quality, making them perfect for food preservation and long-term storage.

How Many Layers Does a Vacuum Bag Have?

Most high-quality vacuum bags are made with multi-layer co-extruded film, typically 2 to 3 layers.

• Standard Vacuum Bags: Usually consist of PA/PE in a 2-layer structure, which provides a balanced combination of oxygen barrier and sealability.

• Heavy-Duty or Industrial Vacuum Bags: May go up to 3 layers, offering enhanced performance for products that require longer shelf life, better puncture resistance, or cold storage.

The more layers a vacuum bag has, the better it performs in keeping air out and maintaining product freshness.

3-layer vacuum bag

Standard Sizes and Thickness of Vacuum Bags

Vacuum plastic bags come in a wide range of sizes and thicknesses to suit different applications—from small portions of dried fruit to large cuts of meat or seafood. At Vietpak, we manufacture and supply vacuum bags in customizable options.

Common Vacuum Bag Sizes:

• Small: 150mm x 200mm (6” x 8”)

• Medium: 200mm x 300mm (8” x 12”)

• Large: 300mm x 400mm (12” x 16”)

• Extra-large or Custom Sizes: Available upon request for industrial needs or export packaging.

Standard Thickness:

• 65 microns (Light-duty)

• 70-90 microns (Standard food use)

• 100-150 microns (Heavy-duty applications such as bones, seafood with shells, or long-term freezing)

The bag thickness determines both protection level and vacuum sealing performance. Thicker bags provide better puncture resistance but may require higher sealing temperatures.

What is the Main Use of Vacuum Plastic Bags?

Vacuum bags are widely used across food, medical, and non-food sectors. Their ability to remove air and tightly seal contents makes them suitable for:

1. Food Packaging

• Fresh meat, poultry, and seafood

• Frozen vegetables and fruits

• Processed foods like sausages, cheese, and dried nuts

• Ready-to-eat meals

• Sous-vide cooking

2. Industrial Use

• Electronics components (protection from moisture and oxidation)

• Medical supplies (sterile packaging)

• Textile and garments (space-saving vacuum packing)

By keeping air, moisture, and bacteria out, vacuum bags help extend product shelf life, prevent freezer burn, and reduce oxidation.

Is Vacuum Plastic Bag Safe for Food Contact and Microwave Use?

Yes, high-quality vacuum plastic bags are food-safe and microwave-safe, provided they are manufactured under proper safety standards.

At Vietpak, our vacuum bags meet international food safety requirements such as FDA, EU Food Contact Regulation, and ISO standards. This ensures that the materials used are non-toxic, odorless, and free from harmful chemicals like BPA.

Food Contact:

• Our PA/PE vacuum bags are safe for direct contact with all types of food—raw, cooked, frozen, or dried.

Microwave-Safe:

• Vacuum bags are safe for reheating in the microwave, especially for sous-vide applications.

• However, always ensure the bag is unsealed before microwaving to allow steam to escape and prevent bursting.

Not all vacuum bags are made equally, so it’s important to source from a reliable manufacturer who provides proper certifications and quality assurance.

food-safe vacuum bag

Where to Import Vacuum Plastic Bags?

If you’re looking for a reliable vacuum plastic bag supplier, look no further than Vietpak Company Limited—a leading vacuum bag manufacturer in Vietnam.

Why Choose Vietpak?

• Factory-Direct Prices: As a direct manufacturer, we offer competitive rates without compromising on quality.

• Customization Options: Choose your size, thickness, print, and even barrier level.

• Fast Lead Time: We’re equipped with modern co-extrusion and vacuum bag converting machinery for quick turnaround.

• Export Experience: Trusted by international clients in Asia, Europe, and the Americas.

• Eco-Conscious Production: We follow sustainable practices and provide recyclable options on request.

Whether you are a food processor, retailer, distributor, or packaging wholesaler, Vietpak is your trusted partner for high-quality vacuum packaging solutions made in Vietnam.

Vietpak plastic bag factory

Final Thoughts

Vacuum plastic bags are more than just a packaging choice—they are a solution for freshness, hygiene, and efficiency. With multi-layer PA/PE construction, food-safe materials, and wide application in various industries, vacuum bags are a staple for preserving quality and extending shelf life.

Need bulk vacuum bags at factory prices? Contact Vietpak today to request a sample or quotation and experience the difference of working with a trusted Vietnamese packaging manufacturer.

Read also: https://vietpak.vn/product/mailing-plastic-bag/