Overview
Food Grade Silicone is a specialized silicone elastomer formulated and manufactured to comply with food-contact safety standards such as FDA 21 CFR 177.2600, LFGB, and other international food safety regulations. It offers exceptional temperature resistance, flexibility, chemical stability, non-toxicity, odorlessness, and durability, making it one of the most widely used materials in food processing and beverage industries.
Unlike conventional rubber materials, Food Grade Silicone does not leach harmful substances, retains flexibility over a wide temperature range, and withstands repeated cleaning and sterilization cycles.
Food Grade Silicone is widely used in:
- Food Processing Equipment
- Beverage Systems
- Bakery Equipment
- Kitchen Appliances
- Coffee Machines
- Dairy Processing Systems
- Food Packaging Components
- Consumer Kitchen Products
Due to its excellent safety profile and long service life, Food Grade Silicone has become the preferred elastomer for food-contact applications worldwide.
Material Specification
| Property | Value |
|---|---|
| Material Designation | Food Grade Silicone |
| Full Name | Food Contact Silicone Rubber |
| Material Family | Silicone Elastomer (VMQ) |
| Density | 1.10–1.30 g/cm³ |
| Appearance | Transparent, White, Colored |
| Hardness Range | Shore A 20–80 |
| Typical Manufacturing Methods | Compression Molding, Injection Molding, Extrusion, LSR Molding |
| Standard Forms | Sheets, Tubes, Gaskets, Molded Parts |
Regulatory Compliance
| Standard | Compliance |
|---|---|
| FDA 21 CFR 177.2600 | Available |
| LFGB (Germany) | Available |
| EU Food Contact Regulations | Available |
| RoHS | Compliant |
| REACH | Compliant |
| BfR Recommendations | Available |
Food Grade Silicone is specifically designed for direct and indirect food-contact applications.
Chemical Composition
Food Grade Silicone is based on high-purity polysiloxane polymers.
| Component | Function |
|---|---|
| Silicone Polymer (VMQ) | Elastic Matrix |
| Food-Safe Silica Fillers | Reinforcement |
| Food-Safe Curing Agents | Crosslinking |
| Food-Approved Pigments | Color Control |
| Processing Additives | Performance Enhancement |
The formulation is designed to minimize extractables and contamination risk.
Common Food Grade Silicone Grades
| Grade | Characteristics |
|---|---|
| Standard Food Grade Silicone | General Food Contact |
| Platinum-Cured Silicone | Highest Purity |
| Transparent Silicone | Visual Inspection Applications |
| High Temperature Food Grade Silicone | Extreme Heat Applications |
| LSR Food Grade Silicone | Precision Injection Molding |
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 7–12 MPa |
| Elongation at Break | 250–700% |
| Tear Strength | 20–50 kN/m |
| Compression Set | Low |
| Hardness | Shore A 20–80 |
| Resilience | Excellent |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Flexibility | Outstanding |
| Elastic Recovery | Outstanding |
| Tear Resistance | Excellent |
| Fatigue Resistance | Excellent |
Food Grade Silicone maintains elasticity throughout its service life.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.10–1.30 g/cm³ |
| Water Absorption | Very Low |
| Thermal Conductivity | 0.15–0.30 W/m·K |
| UV Resistance | Outstanding |
| Ozone Resistance | Outstanding |
The material performs exceptionally well in food processing environments.
Thermal Properties
| Property | Value |
|---|---|
| Continuous Service Temperature | -60°C to 200°C |
| High Temperature Grade | Up to 250°C |
| Short-Term Temperature Resistance | Up to 300°C |
| Brittleness Temperature | Below -70°C |
Food Grade Silicone can withstand cooking, sterilization, freezing, and baking environments.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| Food Grade Silicone | 1.20 | 10 MPa |
| EPDM | 1.15 | 10 MPa |
| NBR | 1.20 | 15 MPa |
| Natural Rubber | 0.93 | 20 MPa |
While not the strongest elastomer, Food Grade Silicone excels in safety and thermal performance.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Outstanding |
| Steam | Outstanding |
| Food Acids | Excellent |
| Alcohols | Good |
| Cleaning Agents | Excellent |
| Detergents | Excellent |
| Vegetable Oils | Good |
| Animal Fats | Good |
| Petroleum Oils | Moderate |
Food Grade Silicone withstands frequent cleaning and sanitation procedures.
Sterilization Resistance
| Sterilization Method | Performance |
|---|---|
| Steam Sterilization | Outstanding |
| Hot Water Sanitization | Outstanding |
| Chemical Sanitization | Excellent |
| UV Sterilization | Excellent |
Suitable for repeated cleaning and sterilization cycles.
Food Safety Performance
| Property | Performance |
|---|---|
| Non-Toxic | Yes |
| Odorless | Yes |
| Taste Neutral | Yes |
| BPA-Free | Yes |
| Food Contact Safe | Yes |
Food Grade Silicone does not impart taste, odor, or contaminants to food products.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹⁴ Ω·cm |
| Dielectric Strength | 18–25 kV/mm |
| Dielectric Constant | 2.8–3.3 |
| Arc Resistance | Excellent |
Useful for food processing equipment containing electrical components.
Compression Set Resistance
| Property | Performance |
|---|---|
| Seal Retention | Excellent |
| Elastic Recovery | Outstanding |
| Long-Term Gasket Performance | Outstanding |
| Compression Set Resistance | Excellent |
Food Grade Silicone is widely used in seals and gaskets due to its long-term elasticity.
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Compression Molding | Outstanding |
| Injection Molding | Outstanding |
| LSR Injection Molding | Outstanding |
| Extrusion | Outstanding |
| Overmolding | Excellent |
Food Grade Silicone is suitable for both simple and highly complex components.
International Equivalent Standards
| Standard | Equivalent |
|---|---|
| FDA | Food Grade Silicone |
| LFGB | Food Contact Silicone |
| ISO | VMQ |
| DIN | Silikon-Kautschuk |
| JIS | Silicone Rubber |
| GB/T (China) | 食品级硅胶 |
Available Forms
| Product Type | Availability |
|---|---|
| Sheets | Yes |
| Tubes | Yes |
| Gaskets | Yes |
| Extruded Profiles | Yes |
| Molded Parts | Yes |
| LSR Components | Yes |
Typical Applications
Food Processing Industry
- Conveyor Seals
- Processing Equipment Gaskets
- Food Transfer Tubing
- Mixer Components
Beverage Industry
- Coffee Machine Seals
- Beverage Dispensing Systems
- Water Purification Equipment
- Filling Equipment Components
Bakery Industry
- Baking Molds
- Oven Seals
- Dough Processing Equipment
Dairy Industry
- Milk Processing Equipment
- Dairy Transfer Tubes
- Sanitary Gaskets
Kitchen Appliances
- Pressure Cooker Seals
- Blender Components
- Air Fryer Gaskets
- Food Storage Products
Consumer Products
- Baking Mats
- Kitchen Utensils
- Baby Feeding Products
- Reusable Food Containers
Advantages
Food Contact Safety
Complies with major global food-contact regulations.
Outstanding Temperature Resistance
Performs from freezing temperatures to baking environments.
Excellent Sterilization Resistance
Suitable for repeated cleaning and sanitation cycles.
Odorless and Taste Neutral
Does not affect food quality.
Exceptional UV & Ozone Resistance
Long service life in demanding environments.
Flexible and Durable
Maintains elasticity over extended periods.
Limitations
Lower Mechanical Strength
Not as strong as some industrial elastomers.
Moderate Oil Resistance
Not ideal for continuous petroleum oil exposure.
Higher Material Cost
More expensive than general-purpose rubber materials.
Gas Permeability
Higher gas transmission than some specialty elastomers.
Comparison with Food-Grade Elastomers
| Property | Food Grade Silicone | Food Grade EPDM | Food Grade NBR |
|---|---|---|---|
| Food Safety | Outstanding | Excellent | Excellent |
| Temperature Resistance | Outstanding | Excellent | Moderate |
| UV Resistance | Outstanding | Excellent | Poor |
| Oil Resistance | Moderate | Poor | Excellent |
| Flexibility | Outstanding | Good | Good |
Comparison with Food Grade EPDM
| Property | Food Grade Silicone | Food Grade EPDM |
|---|---|---|
| High Temperature Resistance | Better | |
| Low Temperature Flexibility | Better | |
| Food Contact Performance | Better | |
| UV Resistance | Better | |
| Cost | Higher |
Food Grade Silicone is often selected when temperature extremes and long-term food safety are critical.
Available Surface Finishes
Standard Finishes
- Smooth Surface
- Matte Surface
- Molded Finish
Functional Finishes
- Sanitary Finish
- Medical/Food Grade Finish
- Transparent Finish
Specialty Grades
- Platinum-Cured Silicone
- FDA Food Grade Silicone
- LFGB Silicone
- Transparent Silicone
- High Temperature Food Grade Silicone
Frequently Asked Questions (FAQ)
What is Food Grade Silicone?
Food Grade Silicone is a silicone elastomer specifically formulated and certified for food-contact applications.
What is Food Grade Silicone used for?
Typical applications include:
- Food Processing Equipment
- Beverage Systems
- Kitchen Appliances
- Food Storage Products
- Bakery Equipment
Is Food Grade Silicone safe for food contact?
Yes. Certified grades comply with FDA, LFGB, and other food safety regulations.
Can Food Grade Silicone be sterilized?
Yes. It withstands repeated steam, hot water, UV, and chemical sterilization cycles.
Is Food Grade Silicone BPA-free?
Yes. Food Grade Silicone is BPA-free and does not contain harmful plasticizers.
Why choose Food Grade Silicone?
Because it combines:
- Food Safety Compliance
- Extreme Temperature Resistance
- Excellent Flexibility
- Sterilization Resistance
- Long Service Life
What is the difference between Food Grade Silicone and Medical Grade Silicone?
Medical Grade Silicone meets stricter biocompatibility requirements, while Food Grade Silicone is specifically certified for food-contact applications.
Does GCNOV provide Food Grade Silicone manufacturing services?
Yes. GCNOV provides:
- Food Grade Silicone Compression Molding
- LSR Injection Molding
- FDA-Compliant Silicone Components
- Beverage System Components
- Food Processing Equipment Parts
- Prototype Development
- Low-Volume Production
- Mass Production