Single-use assemblies

01Overview and value chain

Markers: [EC: GMP Annex 1 | OECD: Industrial biotechnology | Regulator: FDA (USA), EMA (EU)]

Single-use assemblies (SUAs) have fundamentally transformed biomanufacturing by replacing rigid stainless-steel piping and vessels with pre-sterilized, disposable polymer fluid paths. Comprising biocontainment bags, platinum-cured silicone tubing, sterile connectors, and integrated sensors, these assemblies arrive ready-to-use after gamma or X-ray irradiation. By eliminating the need for energy-intensive Clean-in-Place (CIP) and Steam-in-Place (SIP) operations, SUAs reduce facility water consumption by up to 80% and drastically shrink capital expenditure. Crucially, single-use technology allows contract manufacturers to switch between entirely different cell lines or biologic products in hours rather than weeks, virtually eliminating the risk of batch-to-batch cross-contamination.

The key directions of single-use assemblies are:

1. Bioprocess Containers (2D/3D Bags): Multilayer polymer bags ranging from 50 mL to 3,000 L, utilizing advanced contact layers (e.g., ULDPE or EVA) engineered to minimize the shedding of extractables and leachables (E&L) into the drug product.
2. Sterile Connectors and Disconnectors (Connectors): Patented mechanical valves (e.g., AseptiQuik) that allow operators to securely join two separate sterile fluid paths in an unclassified (non-sterile) environment without breaching the sterility of the internal flow.
3. Pre-assembled Manifolds (Custom fluid paths): Highly customized networks of tubing, filters, and aseptic sampling ports designed to seamlessly connect bioreactors directly to downstream chromatography and filtration skids.
4. Integrated Single-use Sensors (Smart assemblies): The embedding of pre-calibrated optical dissolved oxygen, pH, and pressure sensors directly into the polymer matrix, eliminating the need to insert reusable probes.

Sectoral value chain

[Polymer Extrusion & Film Casting] ──> [Component Assembly & Welding] ──> [Gamma/X-Ray Sterilization] ──> [E&L Validation]
                                  │
                          (Sterile Connectors)
                                  │
                                  ▼
[Biopharma Manufacturing] <─── [Logistics & Inventory] <─────┘

Value chain levels

Cross-cutting technologies of the sector:

• X-Ray sterilization: A rapid pivot away from cobalt-60 gamma irradiation towards machine-generated X-ray sterilization to overcome global radioactive isotope supply chain bottlenecks.
• Advanced film architecture: The development of ultra-low density polyethylene (ULDPE) contact layers that exhibit near-zero interactions with sensitive mammalian cells (e.g., CHO).
• Automated tube welding: Devices that thermally melt and fuse thermoplastic elastomer (TPE) tubing to create a sterile connection without mechanical connectors.

02US

The United States represents the largest market for customized single-use assemblies, driven by intense clinical pipeline activity in monoclonal antibodies and cell & gene therapies (CGT).

CDMO scale-out, sterile connectors, supply chain resilience

• Connector dominance: US-based engineering firms like Colder Products Company (CPC) dictate the global standard for mechanical sterile connectors, acting as the critical junctions for nearly all fluid paths.
• Domestic capacity expansion: Following pandemic-induced supply chain failures, massive federal and corporate investments have rapidly onshore expanded the domestic manufacturing of bioprocess containers (e.g., Thermo Fisher, Cytiva).
• CGT customization: The highly fragmented US cell therapy market requires hyper-customized, small-volume closed systems (e.g., Meissner) to safely handle autologous patient samples.

03CN

China’s rapid embrace of single-use technology serves as the primary accelerator for its aggressive expansion into global contract manufacturing and biosimilar production.

Import substitution, mega-facilities, rapid iteration

• Aggressive indigenization: Chinese firms like LePure Biotech are aggressively reverse-engineering and scaling domestic production of single-use bags and tubing to break the historical duopoly of US and German suppliers.
• Mega-scale single-use: China boasts some of the world’s largest exclusively single-use facilities, deploying dozens of 2,000 L single-use bioreactors (SUBs) in parallel (e.g., WuXi Biologics’ scale-out strategy).
• Supply chain autonomy: Driven by national security directives, the Chinese government heavily subsidizes domestic suppliers to master high-end medical polymer extrusion and E&L validation.

04EU

The European Union combines legacy bioprocessing expertise with intense regulatory scrutiny to engineer the world’s most robust and widely used single-use film architectures.

Film science, E&L leadership, X-ray sterilization

• Global film titans: German powerhouses like Sartorius (Flexsafe) and Merck KGaA (Mobius) control the core intellectual property for the multi-layer films that define the safety and efficacy of single-use bags.
• E&L standardization: European regulatory bodies and industry consortia (like the BioPhorum Operations Group) lead the global standardization of extractables and leachables testing protocols.
• X-Ray transition: With a strong domestic focus on eliminating radioactive hazards, European manufacturers are pioneering the global transition to large-scale X-ray sterilization facilities for biopharma consumables.

05Leading companies and research institutes

06Tech stack and innovations

The reliability of single-use assemblies hinges entirely on the integrity of the polymer film, the robustness of the sterile connection, and comprehensive material science validation.

1. Multi-layer Bioprocess Film:
   • Comprises up to 7 layers, including a structural outer layer (PET or nylon), an oxygen/gas barrier core (EVOH), and a highly inert inner contact layer (ULDPE or EVA).
   • Prevents gas exchange that could ruin cell cultures while ensuring no toxic plasticizers leach into the drug substance.
2. Mechanical Sterile Connectors:
   • Features overlapping, peel-away sterilization membranes.
   • Operators physically connect the two halves, click them into place, and simultaneously pull away the protective membranes, instantly creating a sterile fluid path in a non-sterile room.
3. Thermoplastic Elastomer (TPE) Welding:
   • TPE tubing is placed into an automated heated jaw device. The device cuts the tubing, aligns it with another tube, and melts them together at over 200°C.
   • Provides a permanent, sterile, and leak-proof fusion capable of withstanding high internal pressures during downstream filtration.

07Value chains and production pipelines

Industrial pipeline of Single-Use Assembly Manufacturing (ISO 13485)

┌───────────────────────────┐      ┌───────────────────────────┐
│ 1. Film extrusion         │ ───> │ 2. Cleanroom fabrication  │
└───────────────────────────┘      └───────────────────────────┘
                                                 │
                                                 ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 4. Irradiation (Gamma/X)  │ <─── │ 3. Quality testing & seal │
└───────────────────────────┘      └───────────────────────────┘
              │
              ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 5. Biopharma deployment   │ ───> │ 6. Post-use disposal      │
└───────────────────────────┘      └───────────────────────────┘

Stage 1: Film extrusion

Raw polymer resins are melted and co-extruded in massive cleanroom facilities to form continuous rolls of multi-layer film, strictly monitored for particulates and chemical consistency.

Stage 2: Cleanroom fabrication

Inside ISO 7 cleanrooms, technicians or automated robots cut the film and thermally weld the seams to form bags. Silicone tubing, filters, and sterile connectors are manually attached and zip-tied or crimped into place.

Stage 3: Quality testing & seal

The fully assembled manifold is subjected to rigorous pressure-decay testing to ensure there are no microscopic pinhole leaks in the bag seams or tube junctions before being double-bagged in protective Tyvek.

Stage 4: Irradiation (Gamma/X)

Pallets of the packaged assemblies are routed through a massive irradiation facility, receiving a validated dose of 25 to 50 kGy of gamma rays or X-rays to completely sterilize the internal and external surfaces.

Stage 5: Biopharma deployment

The sterile assemblies are unboxed in the biopharma facility. Operators mount the 3D bags inside stainless-steel support bins, make the sterile connections, and begin pumping media or cell culture.

Stage 6: Post-use disposal

After the batch is complete, the entire assembly—now filled with biological waste—is disconnected, sealed, and safely transported for incineration or specialized advanced recycling, instantly freeing the suite for the next batch.