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As a flexible packaging manufacturer with 26+ years of experience, Packtastic combines barrier materials, multilayer film structures, printing and converting processes to engineer packaging that protects food, extends shelf life and builds brands. This page documents our core manufacturing technologies — from EVOH and PVDC barriers to gravure printing and retort processing — so you can see exactly how your packaging is made.
Barrier layers control the transmission of oxygen, moisture, aroma and light through a package. Choosing the right barrier technology is the single most important decision for extending the shelf life of sensitive food products.
What is it? EVOH (ethylene vinyl alcohol) is a high-performance oxygen barrier resin with one of the lowest oxygen transmission rates (OTR) among flexible packaging materials. In multilayer films it is sandwiched between nylon or PET layers to protect it from moisture.
Key advantages: Extremely low OTR; transparent — product visibility is retained; excellent for oxygen-sensitive foods; recyclable-compatible structures available.
Typical applications: Vacuum bags, thermoforming films, meat and cheese packaging, ready meals, products needing 12+ months of shelf life.
Related products: PVDC & EVOH Barrier Films & Bags
What is it? PVDC (polyvinylidene chloride) is a coating or film layer with outstanding combined oxygen and moisture barrier, and excellent chemical resistance.
Key advantages: Combined O2 and H2O barrier in one layer; very high shrinkage for tight skin packaging; good sealing performance.
Typical applications: PVDC shrink bags for meat and poultry, barrier bags, cheese and tuna packaging.
Related products: PVDC & EVOH Barrier Films & Bags
What is it? Aluminum foil (AL) is a light-, oxygen- and moisture-proof metallic layer typically laminated as PET/AL/PE or similar structures.
Key advantages: Near-zero gas and light transmission; maximum shelf life; withstands high retort temperatures; premium brand appearance.
Typical applications: Retort pouches, coffee packaging, spice and pharmaceutical packaging, products requiring 18–24 months of shelf life.
Related products: Retort Pouches
Every package is a combination of functional layers. Packtastic engineers each multilayer structure — sealant, barrier, print and strength layers — for the product, process and shelf-life target.
What is it? A two-layer (or co-extruded) structure combining polyamide (nylon, PA) for strength and polyethylene (PE) as the heat-seal layer.
Key advantages: Excellent puncture resistance and toughness; reliable heat sealing; cost-effective workhorse for vacuum packaging.
Typical applications: Vacuum bags for meat, seafood, poultry, cheese and frozen food.
Related products: Vacuum Bags
What is it? Polyester (PET) outer layer laminated with PE sealant — a structure known for dimensional stability and a smooth printing surface.
Key advantages: High print quality; glossy retail appearance; good moisture barrier; stable on high-speed packaging lines.
Typical applications: Custom printed pouches, stand-up pouches, retail food packaging.
Related products: Custom Printed Flexible Packaging
What is it? A three-layer laminate of PET (print/strength), aluminum foil (barrier) and PE (sealant).
Key advantages: Complete light/oxygen/moisture barrier; retort-safe; long shelf life; strong, heat-resistant package.
Typical applications: Retort pouches for ready meals, seafood and meat; high-barrier coffee and snack packaging.
Related products: Retort Pouches
What is it? Cast polypropylene (CPP) film used as a sealant layer or standalone film, offering clarity and strong seals at moderate temperatures.
Key advantages: Excellent transparency; good heat-seal strength; cost efficient; works well with form-fill-seal lines.
Typical applications: Rollstock film, horizontal form-fill-seal (HFFS) packaging, snacks and bakery.
Related products: Rollstock Film Packaging
Printing turns a protective package into a brand asset. Packtastic offers both gravure and digital printing so customers can choose between high-volume economy and low-MOQ flexibility.
What is it? Gravure (rotogravure) transfers ink from engraved cylinders — the industry standard for high-volume flexible packaging.
Key advantages: Highest color consistency and speed at scale; excellent ink coverage; lowest unit cost on long runs.
Typical applications: Large-volume orders of custom printed pouches, bags and rollstock for national brands.
Related products: Custom Printed Flexible Packaging
What is it? Inkjet digital printing applies designs directly without engraved plates, enabling short runs and variable data.
Key advantages: Zero plate fees; low MOQ; fast turnaround; easy design updates — ideal for testing and small brands.
Typical applications: Startup brands, seasonal packaging, personalized and small-batch custom pouches.
Related products: Low-MOQ Digital Printing Packaging
Film structure only matters when it survives the packaging process. These four converting and filling technologies define how your product is packed and how long it stays fresh.
What is it? Removing air from the package before sealing, which slows oxidation, microbial growth and moisture loss.
Key advantages: Up to 3–5x longer shelf life; protects flavor, color and nutrition; compact, tamper-evident packages.
Typical applications: Meat, seafood, cheese, sous vide, frozen food and prepared meals.
Related products: Vacuum Bags · Vacuum Sealer Bags
What is it? Packaging that withstands high-temperature sterilization (typically 121–135°C) after sealing, allowing shelf-stable storage without refrigeration.
Key advantages: Ambient shelf life of 12–24 months; no cold chain needed; foil and transparent options available.
Typical applications: Ready meals, seafood, meat, soups and pet food.
Related products: Retort Pouches
What is it? Heating a bottom film and forming it into cavities that hold the product, then sealing a top film — often with vacuum or gas flushing.
Key advantages: Tight product fit (vacuum skin packaging); excellent barrier performance; efficient multi-cavity output; reduces packaging material waste.
Typical applications: Fresh meat and poultry trays, cheese, fish fillets, medical and industrial parts.
Related products: Thermoforming Films
What is it? Form-fill-seal (FFS) machines form a pouch from rollstock film, fill it with product and seal it in one continuous automated process.
Key advantages: High packing speed; reduced labor and material cost; consistent package quality on automated lines.
Typical applications: Snacks, dried foods, liquid portion packs, pharmaceutical sachets.
Related products: Rollstock Film Packaging
EVOH barrier packaging uses an ethylene-vinyl alcohol layer to block oxygen. It is the best choice for oxygen-sensitive foods such as meat, cheese and ready meals that need a transparent package with extended shelf life.
EVOH offers the lowest oxygen transmission rate but loses barrier performance in high humidity. PVDC provides a combined oxygen and moisture barrier in one layer with high shrinkage. PVDC suits shrink bags; EVOH suits thermoforming and co-extruded vacuum films. Packtastic supplies both structures.
PA/PE is the standard choice for vacuum bags because nylon provides puncture resistance and toughness. PET/PE is preferred when print quality and dimensional stability matter more, for example in custom printed retail pouches.
Gravure uses engraved cylinders and is most economical for large volumes with the highest color consistency. Digital printing has no plate fees, supports low MOQs and fast design changes — ideal for small brands and test runs.
Retort pouches are designed to withstand high-temperature sterilization at 121–135°C (250–275°F). PET/AL/PE foil structures are the most common choice for retort applications.
Thermoforming heats a bottom film, forms cavities, places the product inside, and seals a top film — often under vacuum — creating a tight, protective package such as vacuum skin packaging for meat and cheese.
Form-fill-seal is a fully automated process that forms, fills and seals pouches from rollstock film in one line, delivering high speed and low unit cost for high-volume products.
A Chinese manufacturer and global supplier with over 26 years of flexible packaging expertise. Based in the heart of China's flexible packaging production region, we integrate packaging industry resources to deliver reliable solutions worldwide. Trusted by Fortune 500 companies, we focus not only on business, but also on supporting and caring for our customers.
