Polyvinylidene chloride (PVDC)

Description

1. Product Overview
Polyvinylidene Chloride (PVDC) is a high-barrier thermoplastic polymer engineered to deliver exceptional resistance to oxygen, moisture, and aromatic compounds. Its primary industrial use is in multi-layer flexible and rigid packaging for food, pharmaceuticals, and high-value industrial goods where extended shelf life is critical. The key value proposition is its ability to dramatically reduce product degradation and waste, offering superior barrier performance compared to EVOH or polyethylene alone. Strategically, PVDC is indispensable for global supply chains transitioning toward lightweight, resource-efficient packaging that replaces metal and glass.

2. Key Specifications & Technical Characteristics

• Chemical composition: Copolymer of vinylidene chloride (typically 75–95%) with vinyl chloride or acrylate monomers

• Purity grade: Industrial grade ≥99.5%; Food-contact compliant grade available (FDA, EU 10/2011)

• Physical form: White to off-white fine powder or translucent pellets

• Particle size: 150–500 µm (powder); 2–5 mm pellets

• Density: 1.65–1.72 g/cm³

• Melt flow index (MFI): 2–10 g/10 min (190°C/2.16 kg, adjustable per application)

• Barrier performance (typical): Oxygen transmission rate (OTR) < 0.5 cm³·µm/(m²·day·atm); WVTR < 0.1 g·µm/(m²·day)

• Packaging options: 25 kg multi-layer paper bags with PE liner; 500–1,000 kg FIBC bulk bags

• Shelf life: 24 months when stored below 30°C in dry, UV-protected conditions

3. Core Industrial Applications

• Food packaging (primary industry): Used in cheese wraps, processed meat casings, cereal liners, and coffee sachets. PVDC outperforms EVOH in high-humidity environments because its barrier properties do not degrade with moisture exposure, reducing oxygen ingress by 60%+ over 6 months.

• Pharmaceutical blister films: Provides near-zero moisture transmission for hygroscopic drugs. Unlike aluminum foil laminates, PVDC allows transparent inspection without barrier loss.

• Chemical & agrochemical containment: Liners for corrosive liquid concentrates and volatile pesticides. PVDC resists solvent permeation where standard HDPE fails within 30 days.

• Industrial adhesive films: Co-extruded tie-layer for multi-material laminates (PET/Alu/PVDC/PE), enabling reduction in total material thickness by up to 25% versus all-aluminum structures.

Commercial advantage: Lower total applied cost – PVDC allows downgauging from 25µm to 12µm while maintaining barrier equivalence, reducing raw material spend by 15–20%.

4. Competitive Advantages

• Quality consistency: Lot-to-lot MFI variance < ±5% (industry average ±15%). Supplied with Certificate of Analysis (CoA) and batch-level GC-MS purity validation.

• Supply reliability: Dual-sourced monomer supply contracts (Asia + Europe) ensuring >98% on-time delivery even during feedstock volatility.

• Logistics capability: Temperature-monitored container shipping with desiccant-lined pallets. Global warehouse hubs in Rotterdam, Singapore, and Houston.

• Price competitiveness: Fixed quarterly pricing available for annual contracts of 500MT+. No premium for food-grade certification.

• Sustainability: Formulations with >30% bio-attributed carbon content (ISCC PLUS certified). Recyclable in PE-rich streams with <5% PVDC content.

• Technical support: Free barrier modeling service (predict OTR/WVTR for your specific laminate structure) and on-site extrusion troubleshooting.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20 MT (single grade, one packaging type)

• Loading capacity per 20FT container: 20 MT (net, using 1,000 kg FIBC bags – 20 bags per container)

• Loading capacity per 40FT HC container: 26 MT (maximum payload limited by axle weight; 26 x 1,000 kg FIBCs)

• Lead time: 14 days from order confirmation for stock grades; 30 days for custom MFI/grades

• Incoterms supported: EXW, FOB, CIF (main global ports)

• Payment terms: Letter of Credit (L/C at sight) for spot orders; Net 30 days for approved corporate accounts