High Barrier Bag

High barrier bags can be custom built with protective layers and materials like film foil laminations, polyvinylidene chloride, and high density polyethylene. They are used for packaging a variety of products, including cannabis and edibles, coffee, tea, baby food, frozen foods, raw ingredients, pharmaceuticals, electronics, industrial chemicals, and agricultural products. Multiple layers of barrier film create the foundation of flexible pouches and bags, these layers are laminated together to form a remarkably strong and durable structure and material. High barrier bags are the product of the pressing need to have packaging guaranteed to protect and preserve products. In addition to having high puncture resistance and tensile strength, their oxygen and moisture vapor transmission rate is low.

Meat and Seafood
High barrier bags can prevent the penetration of water and oxygen, reduce bacterial growth, and thus extend the shelf life of meat. For seafood products, high barrier bags can also prevent contamination by odors and odors.

Dairy Products
High barrier bags can effectively prevent the entry of oxygen and water vapor, maintaining the taste and nutritional value of dairy products. Some special packaging structures, such as self standing bags, can provide better display effects and convenience.

Nuts and Dried Fruits
High barrier bags can prevent the entry of oxygen and water, delay oxidation reactions, and extend the shelf life of nuts and dried fruits. Some high barrier bags also have moisture and mold resistance, further protecting the product from contamination.

Beverages
High barrier bags can prevent the escape of oxygen and carbon dioxide, maintaining the freshness and taste of beverages. Some special coatings or lamination techniques can increase the gas barrier performance of high barrier bags.

A barrier can consist of single layers, double layers or multilayers of coated films. Single-layer films are permeable to most gases, so added layers will improve the barrier strength. Our barriers fall into four categories, ranging from low to very high.
●Basic - single layer
●Basic - double layer
●Moderate
●High performing
Let's take a look at how these different barriers measure up.

Basic Barrier - Single Layer
Basic barriers with a single layer are food safe and perform well for general packaging. Here are the type of materials you would find in this barrier level:
●Polypropylene (PP): Including CPP, IPP, OPP, MOPP
●Polyethylene (PE): Including High-Density (HD) and Low-Density (LD)
●Polylactic Acid (PLA)
PE and PP materials both provide a moisture barrier. The PE bags are clear, soft, and flexible and provide good heat sealing capabilities. The PP bags provide high clarity, high gloss, and excellent tensile strength yet are not as breathable as the PE bags.
When blended with polymers such as cast unoriented polypropylene (CPP) and biaxially oriented polypropylene (BOPP), the PP bags have even better clarity and heat sealing performance.
PLA is a polylactic acid that is derived from plants and provides a medium oxygen barrier and a low moisture barrier.
Popular products and uses: Includes most of our plastic bags used for food, retail, transporting goods, and general packaging. Our Crystal Clear Bags made with BOPP offer an exceptional presentation for food products.

Basic Barrier - Double Layer
A basic barrier with two layers is often associated with laminated packaging. You may see this combination of materials in a double-layer barrier:
●PE/PP Lamination
●PET/PE Lamination
Materials like PP and PE are combined to create a stronger moisture barrier. Polyethylene Terephthalate (PET) provides a gas and aroma barrier as well as a moisture barrier.
Popular products and uses: Heavy duty gusset bags and heavy duty heat seal bags for grains, nuts, and heftier products; stand up rice pouches and kraft stand up pouches with laminated inner lining used for cookies, candy, coffee, snacks, pet treats, and more.

Moderate Barrier
A moderate level barrier protects against gases, moisture, aromas and sometimes UV light. The types of materials used for this moderate level barrier include the following:
●PVC
●PET
Polyethylene terephthalate or PET is lightweight, food safe, and is commonly used for thermoformed packaging for plastic water bottles, meat and cheese packaging, and microwave packaging.
Polyvinyl chloride or PVC is a more rigid plastic material and can break down from UV rays. This material is chemical resistant yet not as clear. Our soft vinyl products are made of this same material.
PET offers high clarity and an excellent print surface, making it a popular material for displaying decorative food products.
Popular products and uses: Our clear boxes and soft vinyl products are made with either PVC or PET material. For food packaging, PET is the best option. PVC is a better choice for products like office supplies, electronics, and short-term food storage. Soft vinyl products include bookmark sleeves, magnet sleeves, and luggage tags.

High Performing Barrier
High performing barriers are comprised of multilayers and protect against odors, freshness, moisture, gases, UV light, and visible light. The combined materials of high barriers include:
●PET in conjunction with another plastic PE or PP (OP, MOPP or CPP)
●PVDC Lamination: Translucent, more affordable and usually laminated to PET to form KPET
●VMPET lamination: Near opaque and affordable; 4 mil and over is considered smell proof.
●AL lamination: The near-perfect barrier; opaque and smell proof
On its own, PET is a strong plastic that offers an excellent oxygen barrier, durability, and heat resistance. When laminated onto certain plastics like PP or CPP, this blend of materials provides a strong UV and moisture barrier.
Polyvinylidene chloride PVDC is often used as a coating with other plastics (like PET). High gloss in appearance, PVDC offers excellent oxygen and moisture barrier properties, and is comparable to metallized films.
The highest barrier packaging is often a metallized laminate where the middle layer is VMPET or a thin layer of aluminum (Al) is placed on the surface of a plastic film.
VMPET is PET that has been metallized with aluminum and provides a high barrier to light and oxygen.
A layer of aluminum provides the best insulation against light and oxygen and is a near-perfect barrier. Our plant-based PLA stand up pouches are laminated with an ALOX (aluminum oxide) coating, allowing even our eco sustainable pouches to have outstanding high barrier properties.
Popular products and uses: Metallized stand up barrier pouches and heat seal bags, clear PLA-ALOX pouches, coffee bags, and child resistant bags for aromatic and flavorful food and dry goods.