1. Overview
The Gold Standard in High-Barrier Casing Technology
PVDC (polyvinylidene chloride) casings represent the most advanced category of plastic sausage casings. Unlike standard polyamide (nylon) casings, PVDC is a specialized copolymer that delivers exceptional barrier properties against oxygen, water vapor, and aromas – even under high humidity conditions where other barrier materials like EVOH lose their effectiveness.
Our PVDC casings are manufactured through a precision co-extrusion process, resulting in a seamless, transparent film with excellent mechanical strength and controlled thermal shrinkage. They are strictly inedible and function as a high-performance combination of a cooking mold, sterilization vessel, and protective package.
The defining characteristic of PVDC casings is their ability to undergo high-temperature retort sterilization (up to 121°C+) without degrading barrier performance. This makes them the only casing type capable of delivering true ambient-temperature shelf life for sausages – a critical requirement for export markets, military rations, and retail products that cannot rely on cold chain logistics.
Whether you are producing ham sausages, luncheon meats, fish sausages, or cheese products, our PVDC casings provide the barrier performance, heat resistance, and presentation quality to protect your product from production line to consumer table.
2. Key Features
Why PVDC Casings Are the Preferred Choice for Long-Life Meat Products
3. Technical Specifications
Standard Specifications – PVDC High-Barrier Casing Film
Available Colors & Finishes:
4. Applications
Where PVDC Casings Excel
PVDC casings are the premium solution for meat products requiring extended shelf life, export readiness, or retort sterilization:
- Ham Sausages & Luncheon Meats – The classic application. PVDC casings provide the barrier protection needed for ambient-temperature shelf stability.
- Retort-Processed Sausages – Withstands 121°C+ sterilization, making them ideal for shelf-stable products that do not require refrigeration.
- Fish Sausages & Seafood Products – Excellent barrier against oxidation preserves the delicate flavor and color of fish-based sausages.
- Cooked & Boiled Sausages – Provides a smooth, tidy surface after stuffing with long shelf life.
- Molded Ham & Round Sausages – The controlled shrinkage produces wrinkle-free, perfectly shaped products.
- Cheese Products – PVDC casings are also widely used for packaging cheese, maintaining freshness and preventing flavor loss.
- Export-Ready Meat Products – The combination of high barrier and retort compatibility makes PVDC the casing of choice for products shipped to markets without reliable cold chain infrastructure.
Key Differentiator:
PVDC casings are the only casing type that combines ultra-high barrier properties with high-temperature retort sterilization capability. Use them when your product needs to travel far, last long, and look great on the shelf – without refrigeration.
5. PVDC vs. Other Casing Materials – Selection Guide
This comparison helps customers understand why PVDC is the premium choice for long-life products.
6. Manufacturing & Quality Assurance
Precision Co-Extrusion for Uncompromising Barrier Performance
- Raw Material Selection – High-purity PVDC resin (copolymer of vinylidene chloride with vinyl chloride and/or vinyl acetate) sourced from certified suppliers (e.g., Ixan® PVDC)
- Resin Blending – Precise formulation with plasticizers and stabilizers to achieve optimal processing and barrier properties
- Co-Extrusion – Multi-layer extrusion process creates a seamless, uniform tube with consistent wall thickness
- Orientation (Stretching) – Biaxial stretching aligns polymer chains, enhancing mechanical strength and controlled shrink properties
- Annealing (Heat Setting) – Thermal stabilization locks in dimensional stability and shrink characteristics
- Printing – High-definition flexographic or rotogravure printing (up to 10 colors) for vibrant brand graphics
- Slitting & Reeling – Precision cutting to customer-specified widths and winding onto cores
- Quality Control – Continuous monitoring of:
Certifications:
- Food Contact Compliance: FDA 21 CFR, EU Regulation (EC) No 1935/2004, China GB9685
- Food Safety: ISO 22000, HACCP, BRC Global Standard
- Religious Certifications: Halal certified options available
- Product Standards: Compliant with GB/T 17030
7. Storage & Handling Guide
Critical: PVDC film is temperature-sensitive. Strict environmental control is essential.
Handling Best Practices:
- Open Just in Time – Keep casings in sealed moisture-barrier packaging until immediately before use.
- Use Within 2 Hours – Once unwrapped in the filling area, PVDC casings should be used within 2 hours to maintain optimal performance.
- Loading – Slide the reel directly onto the filling horn. Ensure the horn is clean and free of burrs.
- Stuffing – PVDC casings have excellent strength and can be overstuffed for a plump final product. Compatible with all clipping systems.
- Clipping – Strong clipping is recommended due to the casing’s thermal shrinkage during cooking. Aluminum rings are commonly used.
- Cooking/Sterilization – Follow the recommended thermal profile. PVDC casings withstand temperatures up to 130°C.
- Cooling – After cooking, cool the product by water or air shower to set the casing and activate the release layer.
- Peeling – For peelable varieties, the casing strips off cleanly and easily after chilling.
Common Issues & Fixes:
- Casing becomes brittle? → Check storage humidity – should be 30–60%. Avoid refrigeration.
- Poor shrinkage? → Verify cooking temperature meets the recommended profile.
- Print fading? → Ensure cooking temperature does not exceed the maximum specified for the ink system.
8. FAQ
Q: Are PVDC casings edible?
A: No. PVDC casings are strictly inedible and are designed to be peeled off and discarded before consumption.
Q: What is the difference between PVDC and standard polyamide (nylon) casings?
A: PVDC provides far superior oxygen and moisture barrier – up to 10 times better than nylon. PVDC also withstands high-temperature retort sterilization (121°C+), making it the only plastic casing suitable for true ambient-temperature shelf life. Nylon casings are more extensible and shrink more, making them better for some cooked-meat sausages, but they cannot match PVDC’s barrier or retort performance.
Q: What does “retort sterilization” mean and why is it important?
A: Retort sterilization is a high-temperature (121°C+) pressure-cooking process that eliminates all pathogenic bacteria. Products processed this way can be stored at ambient temperature (room temperature) without refrigeration for months – dramatically reducing cold chain costs and enabling export to markets without reliable refrigeration.
Q: How does PVDC compare to EVOH for barrier performance?
A: While EVOH has excellent oxygen barrier in dry conditions, it absorbs moisture and loses barrier performance in humid environments. PVDC maintains its exceptional barrier properties even in high humidity – making it the superior choice for meat products with high moisture content.
Q: Can PVDC casings be printed with my brand logo?
A: Yes. PVDC casings support high-definition printing with up to 9–10 colors. This allows you to display your brand, product name, cooking instructions, and nutritional information directly on the casing – turning it into the final consumer package.
Q: What is the shelf life of products in PVDC casings?
A: With proper retort processing, products in PVDC casings can achieve 6–12+ months of ambient-temperature shelf life. The casing’s ultra-low oxygen and moisture transmission prevents oxidation, color fading, flavor loss, and weight loss during storage.
Q: Are PVDC casings environmentally friendly?
A: PVDC is a plastic material and is not biodegradable. However, its exceptional barrier properties mean that less packaging material is required to achieve the same shelf life compared to alternatives. PVDC casings are also fully recyclable in appropriate streams. Note that incineration of PVDC can produce harmful byproducts, so proper disposal/recycling is recommended.
9. Contact & CTA
Ready to Extend Your Product’s Shelf Life and Reach New Markets?
Whether you’re developing a new export-ready product line or upgrading from standard casings to premium PVDC, we have the technology, capacity, and expertise to deliver.
Request your free consultation package, including:
- Sample reels in your preferred width and thickness
- Custom printing mockups and color swatches
- Retort process recommendations for your specific product
- Shelf-life projection analysis
- Technical data sheets and processing guidelines
📧 Email: info@haxide.com
🌐 Request Samples / Get a Quote: https://haxide.com/
