Electronics-Grade Silicone Tubing
1. Performance Indicators
| Property | Specification | Test Standard |
|---|
| Purity Level | • Ionic contamination: ≤0.1 μg/g (Na/K/Li/Ca) • TOC: ≤50 ppb | SEMI F57, USP <645> |
| Temperature Range | -80°C to +250°C (continuous) • Peak: +300°C (intermittent) | ASTM D1329 |
| Extractables | Non-volatile residue: ≤5 mg/m² (ISO 10993-12) | USP <381> |
| Surface Smoothness | Internal Ra: ≤0.3 μm • External Ra: ≤0.5 μm | ISO 4287 |
| Permeability | Gas transmission (O₂): ≤1000 cc/m²·day·atm | ASTM D1434 |
| Electrical Properties | Volume resistivity: ≥10¹⁵ Ω·cm • Dielectric strength: ≥20 kV/mm | IEC 60260 |
| Biocompatibility | USP Class VI • ISO 10993-5/-10 certified • Cytotoxicity: Non-reactive | USP <88> |
| Cleanroom Class | Packaging: ISO Class 3 (per ISO 14644-1) | IEST-STD-CC1246 |
2. Technical Parameters
| Parameter | Range | Tolerance |
|---|
| Material Grade | Platinum-cured LSR (Low Consistency Silicone Rubber) | - |
| Hardness (Shore A) | 40A • 50A • 60A (±5A) | ISO 48-4 |
| Inner Diameter (ID) | 1.5 mm – 50 mm | ±0.1 mm (≤10mm ID) ±0.5% (>10mm ID) |
| Wall Thickness | 0.5 mm – 5.0 mm | ±10% |
| Length | Standard: 10m/roll • Custom: up to 50m | ±1% |
| Color | Translucent • Red (pharma) • Custom RAL | N/A |
| Surface Treatment | • E-beam sterilization • Plasma-coated (hydrophobic) | - |
| Certification Marks | FDA 21 CFR 177.2600 • REACH SVHC-free • RoHS III | - |
3. Technical Data Sheet
| Characteristic | Value | Unit |
|---|
| Tensile Strength | ≥8.5 | MPa (ISO 37) |
| Elongation at Break | ≥450 | % |
| Tear Strength | ≥25 | kN/m (ISO 34-1) |
| Compression Set (22h @ 150°C) | ≤20 | % (ISO 815) |
| Specific Gravity | 1.12 – 1.20 | g/cm³ |
| Thermal Conductivity | 0.15 – 0.25 | W/m·K |
| Linear Shrinkage | ≤0.5 | % (150°C x 4h) |
4. Critical Applications
| Industry | Application | Fluid Compatibility |
|---|
| Semiconductor | • Ultra-pure chemical delivery (HF, H₂SO₄, solvents) • CMP slurry transfer • Gas distribution (NF₃, SiH₄) | SEMI F20 compliant • Resistivity >18 MΩ·cm |
| Photovoltaics | • Silicon ingot casting coolant • Etchant circulation (NaOH/KOH) • Vacuum deposition lines | Temperature cycling: -40°C ↔ 200°C |
| Pharmaceutical | • Bioreactor feed lines • Sterile filtration manifolds • Fill-finish systems | USP Class VI • SIP/CIP compatible |
| Lithium Batteries | • Electrolyte filling • Solvent recovery systems • Electrode slurry transfer | NMP/EC/DMC resistant |
| Analytical Instruments | • HPLC solvent lines • Mass spectrometer interfaces • DI water circulation | ≤0.1 ppt extractables |
5. Performance Comparison
| Feature | E-Grade Silicone | Standard Silicone | PTFE |
|---|
| Chemical Purity | Class 1 (SEMI) | Class 3 | Class 2 |
| Particle Shedding | ≤5 particles/ml (>0.5μm) | ≤500 particles/ml | ≤20 particles/ml |
| Flexibility | Retains flexibility @ -80°C | Brittles below -50°C | Poor cold flexibility |
| Permeability | Ultra-low gas transmission | High O₂/N₂ permeation | Lowest permeation |
| Steam Sterilization | 500+ cycles @ 121°C | Degrades after 100 cycles | Unlimited |
6. Compliance & Certifications
- Semiconductor: SEMI F57 (chemical tubing), SEMI S8 (safety)
- Pharma: USP Class VI, FDA CFR 177.2600, EUP 10/2011 Annex 1
- Electrical: UL 94 V-0 (flame retardant grade)
- Environmental: ISO 14001, REACH Annex XVII
- Quality: ISO 9001, IATF 16949
Operational Guidelines
⚠️ Critical Limitations:
- Avoid ketones (acetone), concentrated acids (>50% HNO₃), and chlorinated solvents
- Max pressure: 5 bar (thin-wall) / 10 bar (reinforced) @ 25°C
- Use PTFE/PFA liners for HF or aqua regia applications
Installation Best Practices:
- Cutting: Diamond-coated blade with deionized water flush
- Connections: Tri-clover® fittings (ASME BPE-2019) • Avoid metal clamps
- Cleaning: 1% H₂O₂/DI water rinse @ 80°C for 60 min
- Storage: Cleanroom vacuum packaging, ≤25°C/40% RH
Customization Options:
- Conductive silicone (10³–10⁶ Ω/sq per ESD S20.20)
- Reinforced versions (aramid/polyester braid for 15 bar pressure)
- RFID-tagged tubes for traceability
- Pre-assembled sterile manifolds with ASME BPE-certified ends
For validation support (DQ/IQ/OQ protocols, extractables studies), request manufacturer’s GMP documentation package. Tubing lot traceability includes full material genealogy (SiO₂ source, catalyst batch, curing parameters).
