Food-Grade Liquid Silicone Rubber (LSR)
Food-grade LSR liquid silicone compounds for injection molding. Compliance with FDA 21 CFR 177.2600, EC 1935/2004, and BfR XV. Suitable for prolonged contact with food and beverages. Production in ISO 8 cleanroom under ISO 9001 and ISO 13485 control.
Material Principle
Food-grade LSR liquid silicone is a two-component, platinum-cured elastomer that offers exceptional purity, thermal stability, and chemical resistance. Its liquid nature allows for automated injection molding with high precision and repeatability.
Formulation and Certifications
Formulated for direct contact with food and beverages, compliant with FDA 21 CFR 177.2600, EC 1935/2004, BfR XV, and EU 10/2011. Free of byproducts, plasticizers, and volatile compounds. Sterilizable by steam, autoclave, or gamma radiation.
Technical Properties
Available in hardnesses from 20 to 90 Shore A, with excellent thermal resistance (-60 °C to +230 °C), stability against oils, fats, and detergents, and great elasticity at low temperatures. Totally odorless, tasteless, and transparent.
Production Environments
Production in a certified ISO 8 cleanroom, under ISO 9001 and ISO 13485 quality systems. All batches are traceable, analyzed, and accompanied by certificates of conformity and raw material datasheets.
Product Gallery
Key Technical Data
Typical values obtained according to series datasheets (17, 30) and indicated standards. May vary based on hardness, formulation, and application. Final validation is the customer's responsibility.
| Property | Typical Values | Standard |
|---|---|---|
| Hardness (Shore A) | 20 – 70 (núcleo habitual: 40–60) | ISO 7619-1 |
| Tensile Strength | 7 – 11 MPa | ISO 37 |
| Elongation at Break | 400 – 1200 % | ISO 37 |
| Tear Resistance (Type C) | 17 – 47 kN/m | ISO 34-1 |
| Density | 1,11 – 1,20 g/cm³ | ISO 2781 |
| Working Temperature | –60…+200 °C (up to +215 °C in some formulations) | — |
| Tolerances | Molding Class M2 (LSR Injection) | ISO 3302-1 |
| Sectoral (On Request) | FDA / CE 1935/2004 / USP VI / ISO 10993 / RoHS / REACH | — |
Certifications and Regulatory Compliance in Silicone Molding
Every molding batch is manufactured under strict validation protocols, guaranteeing conformity with international standards and integral traceability of the material and the mold.
Main Certifications
- ISO 9001:2015 – Quality Management System
- ISO 13485:2016 – Medical Devices
- EN 9100 – Aerospace and Defense
- GMP – Good Manufacturing Practices
- ISO 10993 – Medical Biocompatibility
- USP Class VI – Pharmaceutical Biocompatibility
Regulatory Compliance
- FDA 21 CFR 177.2600 – Food Contact
- EC 1935/2004 – Materials in Contact with Food
- EN 45545-2 – Railway Fire Protection
- UL94 – Material Flammability
- ISO 10993 and USP Class VI – Medical and Pharmaceutical Biocompatibility
- REACH (1907/2006) and RoHS (2015/863) – Chemical and Electrical Substances
Main Application Sectors
Key Applications
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Gaskets and seals for food contact
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Valves, membranes, and dosing stoppers
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Nozzles, pacifiers, and bottle nipples
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Silicone moulds and kitchen utensils
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Components for industrial dispensers and coffee machines
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Seals for vacuum packaging machines for fresh produce
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Flow control valves in soft drink systems (beverage machines)
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Membranes and diaphragms for food liquid peristaltic pumps
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Sealing stoppers for reusable water bottles and containers
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Internal components of baby bottle and utensil sterilisers
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O-rings for sanitary couplings (Tri-Clamp)
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Flexible dosing devices for additives and colourants
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Protectors and covers for temperature probes in industrial cooking
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Aeration valves in beer and dairy fermentation tanks
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Low-compression seals for hermetic container lids
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Components for sauce and cream dispensers (high viscosity)
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Ergonomic handles and grips for professional kitchen tools
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Filling nozzles in spirits bottling lines
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Closure parts for children's food packaging (Snacks)
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Plugs for inspection holes in meat processing machinery
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Seat gaskets in beer dispenser taps and heads
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Pressure membranes for ice cream and yoghurt machines
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Flexible parts for hot liquid filling equipment (soup)
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Safety seals in industrial fryer lids
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Non-return valves in chocolate pumping systems
Manufacturing and Delivery Options
- Hardness: 10 to 80 Shore A
- Colors: Translucent, white, pigmented, or custom RAL
- Formulation: 100% platinum cure, byproduct-free
- Certifications: FDA, EC 1935/2004, BfR XV, EU 10/2011
- Production: Validated ISO 8 Cleanroom
- Delivery: Traced, tested, and certified material for food contact
- Entrega: material trazado, ensayado y certificado
Product Selection Matrix
| Customer Requirement | Recommended Solution |
|---|---|
| Medical or pharmaceutical use components | LSR Injection Molding |
| High-precision technical parts | HCR Injection Molding |
| Food-contact seals or valves | Food-Grade LSR |
| Integration with other materials | Overmolding |
| Integración con otros materiales | Overmolding |
Technical Conclusion and Recommendations
Food-grade LSR liquid silicone from ProSilicones64 guarantees purity, thermal stability, and sanitary safety for applications in contact with food and beverages.
Produced in an ISO 8 cleanroom under ISO 9001 and ISO 13485 control, it complies with all European and American regulations for direct food contact.
A solution of high performance and total traceability, designed for demanding industrial processes where hygiene and reliability are non-negotiable.
Una solución de alto rendimiento y trazabilidad total para procesos industriales exigentes.
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