Mylars are one of the smartest innovations in the packaging industry. It brings protection, branding, and space saving features under one packaging item. They work to conceal the odor and increase the shelf life of the products, making them ideal for long-term food storage. But as a popular item, people are curious to know what mylar bags are made out of, or how do mylar bags work.  In this blog, we will explore the material and layers of these incredible pouches.

BoPET, They First Layer

BoPET is the base material used to make these pouches. It stretched thin to make them stronger and flexible. Biaxially oriented polyethylene terephthalate serves as the primary protective sheet against moisture and air contaminants. It makes these bags anti-oxygen absorbers and shields the inner product from air, oxygen, and direct sunlight. This layer offers chemical and structural stability, making packed items stay fresh for a longer period.

The Science Behind Mylar’s Metallic Look

The native look of mylar is transparent, yet the foiled layer is the one that gives it a silver shiny look. The PET layer is then aluminized by an aluminium foil sheet, characterized as a Hybrid material.

• A chilled roller receives a thin, molten sheet of extruded PET, cooling and stretching it into a strong, clear Mylar film.
• Then it undergoes a process called vacuum vapor deposition, where aluminum is evaporated and condensed onto the surface of the Mylar. This deposits an ultra-thin, even, and permanent foil coating.
• This layer increases the efficiency of moisture protection and provides a signature look for mylar pouches.

Polyethylene & Nylon Layers for Extra Protection

After foiling, layers of PE and nylon are added to achieve heat sealing properties. PE works as the innermost layer that touches the food and offers an easy resealable opening when paired with zippers. On the other hand, a nylon layer is used to make these bags tear-resistant and puncture free. It is usually used for heavy duty products offering strength and extra durability.

External Printable Layer

This layer is usually used for custom brand-centered pouches. They make a suitable surface to add logos, descriptions, product details, and finishes. This external layer enhances the protection by matte, glossed, or soft touch finishes, making them scratch-free and attractive packaging to put on the display racks.

Wrap Up

Mylar pouches are one of the leading packaging options for several products. Food packaging, CBD products, pet foods, and tech gadgets are widely used in vast industries. Its production starts from a PET layer with an added foil layer that gives it a silvery shine. PE and nylon layers are then added to ensure perfect sealing features and tear resistance.

With these multi-layer properties, these pouches offer great protection and increase the shelf life of inner products. This is why several industries are choosing these bags for export quality and affordable packaging for their vast products.