USP 671 Compliant Moisture Barrier Nonwoven Packaging
Pharmaceutical packaging manufacturers and desiccant system suppliers sourcing substrate materials for moisture-sensitive drug products must meet rigorous barrier performance requirements. USP 671 compliant moisture barrier nonwoven packaging refers to nonwoven-based packaging materials that meet the Moisture Vapor Transmission Rate (MVTR) and moisture permeability requirements defined under USP General Chapter <671> “Containers — Performance Testing.” Favourite Fab manufactures moisture barrier spunbond and laminate nonwoven substrates suitable for pharmaceutical packaging applications requiring USP 671 barrier performance, including desiccant pouches, device packaging, and multi-layer barrier packaging.
What Is USP 671 and How Does It Apply to Nonwoven Packaging?
USP <671> defines container performance testing requirements for pharmaceutical packaging, with specific focus on moisture permeability. The chapter classifies containers by their moisture vapor transmission performance:
- Well-closed container: Protects against extraneous solids and liquid — basic moisture protection
- Tight container: Protects against moisture vapor transmission — target MVTR for most solid oral dosage forms
- Hermetic container: Impermeable to gas — highest moisture barrier requirement
For nonwoven-based pharmaceutical packaging (desiccant pouches, vent patches, protective packaging, device wraps), the relevant performance metric is Moisture Vapor Transmission Rate (MVTR), typically measured by ASTM E96 or ISO 15106 methods. USP 671 uses MVTR data to classify packaging systems, making MVTR the critical specification parameter for nonwoven substrate selection.
MVTR Specifications — Favourite Fab Moisture Barrier Nonwoven Range
Favourite Fab supplies nonwoven and laminate substrates across a range of MVTR values to cover diverse pharmaceutical packaging applications:
| Fabric Grade | Construction | GSM | MVTR (g/m²/24h, ASTM E96B, 38°C/90%RH) | Application |
|---|---|---|---|---|
| SB-Breathable | Spunbond PP | 20–60 gsm | 2000–5000 | Desiccant pouch fabric, vent patches |
| SMS-MedBarrier | Spunbond-Meltblown-Spunbond | 30–70 gsm | 800–2500 | Sterile barrier, device packaging |
| Lam-LowMVTR | Spunbond + Breathable Film Laminate | 60–120 gsm | 200–800 | Moisture-sensitive drug product packaging |
| Lam-VeryLow | Spunbond + Low-MVTR Film Laminate | 80–140 gsm | 50–200 | High barrier pharmaceutical packaging, hermetic applications |
Desiccant Pouch Fabric — A Key USP 671 Application
Desiccant pouches placed inside pharmaceutical packaging are a critical moisture management component for moisture-sensitive solid dosage forms. The nonwoven fabric forming the desiccant pouch must:
- Allow moisture vapor to pass through from the package headspace to the desiccant (high MVTR required)
- Retain the desiccant particles — typically silica gel or molecular sieve — within the pouch (low particle passage)
- Be compatible with the pharmaceutical environment (no extractables that could contaminate the drug product)
- Maintain integrity under humidity and temperature cycling typical of pharmaceutical storage conditions
- Meet FDA and ICH Q1A pharmaceutical packaging material requirements for extractables and leachables evaluation
Favourite Fab’s breathable spunbond grades are specifically used by desiccant pouch manufacturers for this application, offering controlled MVTR, consistent pore structure for desiccant retention, and pharmaceutical-grade quality documentation.
Regulatory Documentation for Pharmaceutical Packaging
Pharmaceutical packaging material qualification under ICH Q1A and FDA 21 CFR requires documented evidence of material performance and safety. Favourite Fab provides:
- MVTR test reports per lot (ASTM E96 Method B, 38°C/90%RH standard conditions)
- Material composition certificates (fiber type, additives, processing aids)
- Extractables and leachables testing coordination (third-party, on request)
- Lot traceability documentation for pharmaceutical supply chain qualification
- REACH compliance statements for EU pharmaceutical market supply
- FDA Drug Master File (DMF) support documentation available on request
Applications Beyond Desiccant Pouches
USP 671-relevant moisture barrier nonwovens from Favourite Fab are used across a range of pharmaceutical and medical device packaging formats:
- Sterile medical device packaging: SMS and spunbond used in Tyvek-alternative and paper-alternative sterile barrier systems
- Pharmaceutical blister backing: Laminate nonwovens as base web for cold-formed and heat-sealed blister packaging
- Wound dressing packaging: Breathable outer packaging for moisture-sensitive wound care products
- Diagnostic kit packaging: IVD and rapid test kit packaging requiring defined moisture barrier performance
Frequently Asked Questions
What MVTR value is required for USP 671 tight container compliance in nonwoven packaging?
USP 671 defines tight container performance in terms of water vapor permeation limits for the complete container system rather than specifying a single MVTR value for the substrate alone. The nonwoven substrate MVTR must be selected to achieve the overall container system performance required by the drug product’s stability testing program. Our technical team can advise on substrate MVTR selection based on your packaging system design and stability requirements.
Is spunbond nonwoven suitable as a desiccant pouch fabric in pharmaceutical applications?
Yes. Spunbond polypropylene nonwoven is widely used as desiccant pouch fabric in pharmaceutical applications. Key parameters for pharmaceutical suitability include pore size (desiccant retention), MVTR (moisture access to desiccant), and extractables profile (compatibility with drug products). Favourite Fab’s pharmaceutical-grade spunbond is produced with controlled specifications for these parameters. We recommend extractables testing as part of your packaging qualification process.
Can you supply material for FDA 510(k) or drug product packaging qualification submissions?
Yes. We provide the material documentation package typically required for FDA 510(k) medical device submissions and drug product packaging qualification, including material composition, physical test data, and extractables testing coordination. Discuss your specific regulatory submission requirements with our technical sales team to ensure complete documentation coverage.
What is the minimum order for pharmaceutical-grade nonwoven packaging material?
Pharmaceutical-grade nonwoven packaging material is available from minimum orders of 500 kg for standard grades. Custom MVTR specifications, laminate constructions, and slit widths are available at standard wholesale MOQs. Competitive wholesale pricing — request a quote for your annual volume requirements.
Source USP 671 Compliant Packaging Nonwoven from Favourite Fab
For pharmaceutical packaging designers and desiccant system manufacturers who need USP 671 compliant moisture barrier nonwoven packaging with verified MVTR performance and full regulatory documentation, Favourite Fab provides direct manufacturer access to the right substrate for your application. Contact our B2B pharmaceutical packaging team today for specification sheets, MVTR test data, and a wholesale pricing proposal.
Related B2B Resources
Related: SMS non woven fabric for desiccant bags.
Gaurav Garg
I'm Gaurav Garg, CEO of Favourite Fab, a company on a mission to revolutionize the nonwoven industry with sustainable practices. We work hand-in-hand with manufacturers and suppliers who share our commitment to eco-friendly production. With a deep interest in textile innovation, I'm passionate about educating consumers about sustainable material options and their potential to transform the nonwoven landscape.
