Custom Mylar bags are made by printing your design onto layered polyester film, laminating it with aluminum and sealant layers for protection, then cutting and heat-sealing the material into the desired pouch shape with features like zippers or tear notches.
These bags are the new go-to for all modern product packaging needs. Whether for food, coffee, vitamins or cosmetics; mylar is used in many different types of durable pouches that not only protect the contents of the bag, but also provide a billboard for the company’s products. If you want to have packaging that will provide a freshness seal, moisture barrier, and a high-end look, knowing how printed mylar bags are manufactured, will allow you to design a better package, as well as sell more.
If you simply want to understand the full scope of the process from material to printing to sealing, then this guide will show you exactly how professional customized mylar bags are manufactured.
What is a Mylar Bag?
Mylar is the name for a biaxial orientation polyester film called (BoPET) or Biaxially-Oriented Polyethylene Terephthalate. BoPET polyester films generally have outstanding thickness and tensile strength along with excellent barrier properties and long-term shelf life.
Custom printed mylar bags are generally made by encapsulating layers together and layering the following:
- Polyester for superior strength and quality of print
- Aluminum foil for barrier to oxygen and light
- Polyethylene for heat seal-ability (seals to its self during heat application)
Mylar pouches provide a wide range of benefits far beyond the typical plastic bags.
Step 1: Choose the Right Bag Type
- With a bottom gusset to allow bags to be upright
- Used for food, flower, dietary supplements, and candy
- Offer a large print area
- Flat Pouch Bags
- Have a slim profile for use as samples
- Less expensive than other packaging options
- Often use a heat seal rather than a resealable package
- Side Gusset Bags
- Expand at the sides
- Widely used for coffee and bulk items
- Can also be used with valves
Selection of the appropriate format will influence tooling, print layout and sealing method.
Step 2: Select Materials and Thickness
Professional custom printed Mylar Bags are made of laminated films and typically use mil thickness for measuring their weight.
Common thickness options:
- 3.5 - 4 mil = lightweight items
- 5 mil = average retail packaging
- 7 mil and heavier = heavy-duty, odor-proof etc.
The barrier properties of the packaging come from having layers of aluminum foil or metalized films bonded together (commonly used for food-grade certified products).
Step 3: Create the Custom Design
The design is what takes a plain, ordinary pouch and turns it into branded packaging.
Start with a mylar bag template.
Your new artwork file must include the following:
- Exact size (width x height x gusset)
- Bleed area
- Safe zone
- CMYK color mode
- High-resolution graphics
Design elements that are commonly included:
- Logo/company/product name
- Nutrition panel/instructions
- QR Code
- Clear Window
- Metallic finishes/holographic finish
Most brands either look really professionally designed or they look amateurish. Strong packaging design increases perceived value immediately.
Step 4: Print the Artwork
Manufacturers use different printing methods which can include:
1. Rotogravure printing - best suited for mass production runs requiring ultra-high-quality printing.
2. Digital printing - best suited for small minimum quantities and very short lead-times.
3. Flexographic printing - best suited for basic designs and high-volume production.
Common finishes can include:
- Matte
- Gloss
- Soft touch
- Spot UV
- Metallic printing
- Inside printing
Step 5: Lamination Process
After printing, the printed films will be combined using pressure and adhesives to create the final laminated multi-layer structure that provides the strength and barrier protection needed to make these bags functional.
Standard laminated structure examples will include:
- Printed PET layer
- Aluminum foil barrier
- Sealant PE layer
Laminating transforms ordinary printed films into true Mylar Bags.
Mylar is a layered material designed to block oxygen, moisture, and light. If you want a deeper breakdown of the barrier science and sealing process, read our guide on how Mylar bags work.
Step 6: Forming the Bag
Laminated films are cut/shaped into pouches using machines.
Operations may include:
- Side seal
- Bottom gusset
- Zipper insertion
- Tear notches
- Valve/spout
By using precision tooling, reliable manufacturers will help ensure that each bag has consistent dimensions.
Step 7: Quality Control
Prior to shipment, all bags must be tested for:
- Seal strength
- Air leaks
- Print correctness
- Color consistency
- Material defects
High-quality manufacturers routinely check their products on multiple levels to ensure that failure does not occur.
DIY versus Professional Manufacturing
While small heat-seal Mylar Bags can be manufactured at home using blank pouches and labels, actual custom printed Mylar Bags, require large industrial machinery to produce and offer:
- Food safety compliance
- Accurate color matching
- Strong seal
- Retail-ready appearance.
High-Converting Customized Mylar Bag Designs Tips
- Use bold contrasting colors for better visual impact on shelves
- Keep fonts/readability clear over distance
- List benefits of your product on the front side of the Mylar Bag
- Use a packaging design that is consistent with your target market
- Consider using a matte finish for more premium look(s).
Packaging will generally be something a customer sees first. A well-designed Mylar Bag can influence a customer's purchase decision within seconds.
So, How are Customized Mylar Bags Made?
Custom Mylar bags are produced by printing artwork on laminated barrier film, bonding multiple protective layers together, and forming the material into sealed pouches using industrial cutting and heat-sealing equipment.
Final Thoughts
Printed Mylar Bags combine protection, branding and shelf appeal into one complete package. By understanding the complete manufacturing process of Mylar Bags, you will be able to make smarter decisions in creating designs and avoiding mistakes that can become costly.
Whether you sell snacks/candy, coffee, supplements, or specialty products, investing in a high-quality customizable Mylar Bag will elevate & prolong freshness of your product.
If you are looking for professional-looking packaging that offers reliability and performance, custom Mylar Bags can provide one of the most effective solutions available today.
Leave a comment