Explore our specialized portfolio of custom retort laminates, shape bags, and stand-up food pouches manufactured for high-temperature sterilizations.
In modern industrial food processing, the transition to flexible packaging has altered how shelf-stable food is preserved, shipped, and displayed. As an expert OEM Retort Packaging Supplier, Jieyang Yuanzhong Printing Co., Ltd. supplies laminated pouch constructions engineered to withstand rigorous autoclave sterilization cycles. These cycles typically run between 121°C and 135°C under hyperbaric pressure.
A true retort pouch is not just a flexible plastic bag; it is a highly engineered multi-layer laminate composite. The combination of layers prevents gas transmission (specifically Oxygen transmission rates, or OTR), blocks moisture migration (Water Vapor transmission rates, or WVTR), and maintains structural seal integrity during high-pressure thermal shifts. This ensures that the food products remain free of bacterial spoilage and oxidation without the need for preservatives or refrigeration.
Endures temperatures up to 135°C (275°F) without experiencing delamination or structural rupture.
Provides zero OTR and WVTR values through optional aluminum foil integration or metalized co-extrusions.
Reduces product shipping weight by up to 90% compared to traditional tin cans, saving distribution fuel.
Originally established in 2001 in the Jiedong District of Jieyang City, Guangdong Province, Jieyang Yuanzhong Printing Co., Ltd. has evolved into a key partner for global food and pet brand manufacturers. For over two decades, our plant has continuously integrated automated technology to deliver consistent flexible packaging materials.
Our capabilities are backed by advanced print and lamination equipment, headlined by the Japan Komori fully automatic printing production lines. These lines operate in conjunction with computerized quality scanning systems. Today, our factory generates a monthly output of over 240 tons of finished pouch laminates. This stable output allows us to meet high-volume demands from our business clients while maintaining strict product quality control.
As a seasoned custom print manufacturer, we support our clients through customized raw material choices, pouch structural layouts, and dimension variables. Our global supply network ships to more than 30 countries across North America, Europe, Australia, and Southeast Asia. We help brands transition from rigid tin or glass options to lighter, lower-impact flexible pouches.
In high-end packaging manufacture, gravure printing is recognized for its thick ink layer transfer, high color saturation, high plate durability, and stable print speeds. This makes it ideal for the long production runs needed for custom packaging. We execute a five-step quality loop to turn raw resins and barrier films into food-grade retort packaging.
Our process starts with high-resolution gravure printing onto the outer PET layer. The printed web then enters the dry or solvent-less composite laminating phase, where it is bonded with barrier layers (Aluminum foil, Nylon, or high-barrier OPA) and the internal sealant layer (Cast Polypropylene - CPP). The slitting phase cuts rolls to precise target widths, which are then either sent directly as rollstock to contract packers or converted into bags (flat, stand-up, or shaped) before final packing and sterilizing quality verification.
Selecting the correct film structure is critical for retort applications. A standard foil laminate structure and its transparent foil-free alternative provide different levels of gas blockages and heating parameters. The table below details the multi-layer barrier options we offer:
| Laminate Layer Type | Standard Foil Structure (4-Ply) | Non-Foil High-Barrier Structure (3-Ply) | Primary Performance Functions |
|---|---|---|---|
| Outer Layer | PET (12 μm) | PET (12 μm) / BOPA (15 μm) | Provides print surface protection, heat resistance during sealing, and outer tensile strength. |
| Barrier Layer | AL Foil (7 - 9 μm) | SiOx or AlOx Coated PET (12 μm) | Blocks oxygen, moisture, and light transmission. Maintains zero-loss product fresh state. |
| Intermediate Layer | BOPA / Nylon (15 μm) | Not applicable / Optional NY for puncture | Improves puncture resistance, drop-shock protection, and absorbs mechanical handling stress. |
| Sealant Inner Layer | R-CPP (70 - 100 μm) | Retort CPP (70 - 100 μm) | Direct food contact safe. Provides seal strength, burst resistance, and thermal bonding properties. |
A core challenge in retort packaging is avoiding the pinholes that can occur in aluminum layers during shipping. By integrating bi-axially oriented polyamide (BOPA or Nylon) between the aluminum and the sealant, we create a cushion that absorbs drop impact forces. For microwaveable products, we replace aluminum with Silicon Oxide (SiOx) or Aluminum Oxide (AlOx) coatings, which allow microwave transmission while providing strong oxygen barrier properties.
The global retort packaging market is expanding rapidly, driven by the consumer demand for shelf-stable food and ready-to-eat meals. According to industry data, the transition from metal cans to flexible retort pouches is growing at a compound annual rate of over 6.5% globally. Food brands are adopting retort pouches to address challenges in cold-chain logistics, especially in developing regions where refrigerated distribution networks can be unreliable.
From a logistics perspective, empty flexible pouches take up to 90% less warehouse space than rigid glass jars or cans. A single truck can ship up to nine times more empty pouches than empty cans, reducing inbound transportation costs and carbon emissions. During retort sterilization, the thinner profile of the pouch allows heat to penetrate to the thermal center of the food product faster. This shorter exposure to heat helps preserve the food's color, texture, and nutritional value.
Retort packaging is used across a variety of food-processing sectors. We customize material weights, thicknesses, and structures to meet the specific requirements of each application:
Designed to hold wet food, chunks in gravy, and purees. Engineered with high-strength seams to resist puncture from bone fragments and retain freshness.
Optimized for rapid reheating. Includes options with structural gussets and tear-notches for convenient consumer use, as well as clear, microwave-safe windows.
Engineered to resist the high acidity of items like tomato pastes or citrus juices, preventing delamination and extending shelf life.
In thermal food processing, packaging integrity is critical to safety. A minor manufacturing defect can lead to seal failure, micro-leakage, and potential food safety issues. To prevent this, Jieyang Yuanzhong Printing Co., Ltd. implements a strict raw-material incoming inspection and manufacturing quality program.
We source only high-performance food-contact polymers that meet global safety standards, including FDA 21 CFR 177.1390 (for high-temperature retort plastics), EU 10/2011 regulations, BRCGS, and ISO9001 guidelines. Our laboratory performs regular batch testing to verify the mechanical properties of each production run, ensuring reliable performance in downstream autoclave processes:
The flexible packaging industry is moving toward more sustainable materials. Historically, retort packaging required multi-material composites, which can be difficult to recycle. To address this, Yuanzhong Pack is developing and testing mono-material high-barrier retort alternatives.
Our engineering team has designed a Mono-PP (Polypropylene) retort pouch. By using structural adjustments and specialty tie-layer resins, this design replaces conventional PET/AL/CPP layers with a fully recyclable PP structure. These new designs provide the heat resistance and gas barriers necessary for retort processing while supporting circular economy initiatives.
Participating in international packaging events across more than 10 countries and supplying custom solutions to over 20 global consumer brands.
Find answers to technical questions about materials, thermal processing, and custom options for retort systems.
Select from our range of custom co-extruded films, stand-up pouches, and high-barrier structures manufactured at our FDA-approved plant.
Yuanzhong Printing
