Silicone Rubber Testing & Laboratory Services
Wire Iran proudly stands as the first company in Iran to achieve ISO 17025 certification, highlighting our dedication to precision and excellence in laboratory testing. Since February 2002, our specialized laboratory for automotive ignition cables and polymer materials has driven advancements through collaboration with the National Standard Institute on research, testing, and product development.
Industry-Leading Lab for Silicone Testing
ISO/TS 16949
ISO 9002
ISO 3808
ISO 9001
ISIRI 4267-2
ISO 17025
10993-5
10993-10
10993-4
Pharma
ASTM F756
Equipped with advanced instrumentation and staffed by experienced professionals, our laboratory adheres to international standards (ISO, DIN, JIS) to provide accurate, reliable, and repeatable testing for all silicone materials, including LSR, HTV, and specialty grades.
Testing Capabilities / Services Overview
Our comprehensive testing capabilities cover mechanical, thermal, electrical, and environmental properties, ensuring each silicone material — from medical and food-grade LSR to industrial and consumer applications — meets stringent performance, compliance, and reliability standards before production.
| Category | Key Tests |
|---|---|
| Mechanical | Tensile strength · Elongation · Tear resistance · Shore hardness (A/D) · Rheometry (ML/ΔT) · Thermal shock |
| Electrical | Dielectric strength · Insulation resistance · Capacitance · Corona & tracking resistance (HV) |
| Thermal / Chemical | Heat aging · Thermal stability (TGA/DSC) · Oil/solvent immersion · Chemical resistance · Low-temp flexibility |
| Environmental | Salt spray · Weathering (UV/ozone) · Flame resistance (UL94 / FMVSS) · Humidity cycling |
Our testing services focus on performance and durability. While automotive cables are subjected to stringent electrical tests to verify voltage capacity, resistance, and conductivity, silicone material, and products can undergo extensive testing for heat resistance, flexibility, and chemical stability. These tests ensure silicone products perform reliably under various environmental and mechanical stresses.
Tensile Test
High Voltage test
Uniformity Test
Spark Plug Cable Set Tests
(Category: Electrical & Thermal Reliability Tests)
1. Erosion Test
Purpose: Evaluate resistance to surface wear, cracking, and micro-tears under long-term heat exposure.
Key Parameters: 180°C for 168 hours.
Applications: Essential for automotive ignition cables operating near engines and exhaust systems.
2. Temperature Shock Test
Purpose: Measure performance under sudden temperature transitions.
Key Parameters: 20 cycles between -30°C and 200°C, 10-second transfer time.
Applications: Required for components used in engines, powertrains, and environments with extreme thermal swings.
3. Salt Spray Test
Purpose: Verify corrosion resistance and electrical stability in harsh environments.
Key Parameters: 48-hour salt-spray chamber exposure.
Applications: Ideal for ignition cables and connectors exposed to humidity, road salts, or marine conditions.
Spark Plug Cable Tests
(Category: Electrical & Environmental Performance Tests)
1. High Voltage Testing
Purpose: Evaluate insulation strength and identify breakdown points under elevated voltage.
Procedure: Samples are exposed to progressively increasing voltage until dielectric breakdown or leakage is detected.
Applications: Critical for cables used in ignition systems and other high-voltage environments requiring reliable insulation integrity.
2. Capacitance Testing
Purpose: Measure the cable’s ability to store electrical charge and maintain signal stability.
Procedure: Capacitance is measured using an LCR meter across the conductor–insulator interface under standard test frequencies.
Applications: Ensures signal integrity in automotive ignition systems and high-performance engines sensitive to electrical noise.
3. Corona Resistance Testing
Purpose: Assess resistance to partial discharge (corona) under high electric fields.
Procedure: Samples are placed in a controlled high-voltage environment to monitor corona inception and extinction voltages.
Applications: Essential for cables operating in high-voltage ignition systems where electrical discharge can degrade silicone insulation.
4. Flame Resistance Testing
Purpose: Verify flame retardancy and safety performance.
Procedure: Cables are exposed to an open flame for 15 seconds and must self-extinguish within 70 seconds, following common automotive flame standards.
Applications: Required for automotive and industrial components operating near heat sources or fire-risk zones.
5. Low-Temperature Flexibility Test
Purpose: Evaluate flexibility and crack-free performance at extreme cold.
Procedure: Samples are conditioned at –50°C and then bent around a mandrel to inspect for surface cracking or stiffness changes.
Applications: Ideal for cold-climate automotive systems and environments requiring low-temperature durability.
6. High-Temperature Oil Resistance Test
Purpose: Determine resistance to oils, fuels, and automotive fluids.
Procedure: Samples are immersed in hot engine oil at elevated temperatures (typically 150–175°C) for a defined duration and checked for swelling, hardness change, and surface degradation.
Applications: Crucial for engine-bay ignition cables exposed to oils, lubricants, and fuel vapors.
7. Insulation Resistance Test (Megger)
Purpose: Evaluate insulation resistance and detect potential leakage paths.
Procedure: A megohmmeter applies a high DC voltage across insulation, and resistance values are recorded to confirm proper dielectric performance.
Applications: Essential for high-voltage ignition systems where insulation failure can cause misfires or electrical faults.
Silicone Products Tests
(Category: Mechanical, Thermal & Electrical Performance Tests)
1. Tensile / Tear / Hardness / Elongation
Purpose: Evaluate core mechanical properties including strength, elasticity, tear resistance, and hardness.
Procedure:
Tensile & Elongation: Tested using a universal testing machine (UTM) at controlled speed until failure.
Tear Strength: Measured using angle/Die-C specimens under tensile load.
Hardness: Verified using Shore A/D durometer under ASTM standards.
Applications: Crucial for automotive, aerospace, consumer products, medical parts, and any application requiring precise and reliable mechanical performance.
2. Rheometric Testing (MDR / ODR)
Purpose: Assess cure behavior, viscosity, and material uniformity under pressure and temperature.
Procedure:
Samples are tested in a Moving Die Rheometer (MDR) or Oscillating Disk Rheometer (ODR) to measure torque curves, scorch time, cure rate, and crosslink density.
Applications: Important for manufacturers requiring material consistency during extrusion, molding, or compounding processes.
3. Temperature Shock Test
Purpose: Evaluate silicone performance under rapid temperature transitions.
Procedure:
Samples undergo repeated cycling between extreme low and high temperatures (e.g., –40°C to 200°C) to observe cracking, stiffness change, and structural stability.
Applications: Essential for silicone parts used in harsh thermal environments such as automotive engine bays, aerospace components, and outdoor systems.
4. High Heat Oil Resistance Test
Purpose: Determine resistance to hot oils, lubricants, and automotive fluids at elevated temperatures.
Procedure:
Specimens are immersed in heated oil (typically 150–200°C) for defined durations. Post-test evaluation includes swelling, hardness change, tensile retention, and surface degradation.
Applications: Crucial for automotive and industrial components exposed to oils, fuels, and lubricants under high heat.
5. Insulation Resistance Test (Megger Testing)
Purpose: Evaluate electrical insulation resistance and detect potential leakage paths or material degradation.
Procedure:
A controlled high DC voltage is applied using a megohmmeter; insulation resistance is measured across the sample to verify dielectric integrity.
Applications: Essential for silicone products used in high-voltage systems, sensors, electrical housings, and automotive ignition components.
1. Curing Uniformity
Purpose: Ensure consistent crosslinking, optimal cure, and stable mechanical properties.
Procedure:
Gelation and crosslinking behavior are measured using rheometry and cure-curve analysis; hardness and density uniformity are verified across multiple sample points.
Applications: Critical for all molded and extruded silicone parts—especially medical, automotive, and electronics components requiring reliable curing behavior.
2. Oil Resistance
Purpose: Evaluate material stability in the presence of oils, lubricants, and hydrocarbons.
Procedure:
Samples are immersed in standardized oils at controlled temperatures; post-immersion changes in weight, volume, hardness, elongation, and tensile strength are recorded.
Applications: Essential for automotive seals, gaskets, cable insulation, and industrial components exposed to oils or lubricants.
3. Thermal Stability
Purpose: Confirm performance under prolonged high and low temperature extremes.
Procedure:
Thermal aging, heat-shock cycling, and long-term temperature exposure tests assess changes in dimensions, mechanical strength, surface appearance, and color stability.
Applications: Suitable for engine components, high-temperature gaskets, sensors, appliances, and outdoor systems.
4. Electrical Insulation Testing
Purpose: Verify dielectric performance and safety for electrical and electronic applications.
Procedure:
Dielectric strength, insulation resistance, and corona/arc resistance are measured using standardized high-voltage test equipment.
Applications: Ideal for connectors, keypads, electronic gaskets, housings, and insulation components.
5. Biocompatibility Testing
Purpose: Ensure silicone compounds meet safety requirements for medical and food-contact applications.
Procedure:
ISO 10993 and USP Class VI tests evaluate cytotoxicity, sensitization, irritation, and overall biological safety; sterilization compatibility may also be validated.
Applications: Used for catheters, valves, baby products, stoppers, seals, and food-grade silicone components.
6. Rheology / Flow Behavior
Purpose: Control flow characteristics, mold filling, and processing performance.
Procedure:
Viscosity measurement, flow-curve analysis, and simulation of injection/transfer molding parameters determine material behavior under shear and temperature.
Applications: Essential for LSR and HTV molding, micro-molding, multi-cavity tools, and high-precision components.
7. Tensile Integrity
Purpose: Confirm tensile strength, elongation, and overall mechanical performance.
Procedure:
Tensile testing per ASTM/ISO standards measures tensile strength, elongation at break, modulus, and tear resistance.
Applications: Suitable for seals, gaskets, tubing, flex components, and industrial silicone parts requiring durability and elasticity.
Silicone Compound Tests
(Category: Material Behavior, Curing Performance & Application Readiness)
Our tests guarantee processing stability, chemical resistance, and thermal endurance, ensuring products perform reliably under extreme industrial conditions.
Quality Assurance & Certified Validation
This traceability framework enables engineers, auditors, and OEMs to confirm compliance across automotive, medical, industrial, and food-contact applications. By combining accredited validation, traceable records, and strict process monitoring, our quality assurance consistently meet global performance, safety, and regulatory requirements.
At Wire Iran quality control is embeded in every stage of production. Our quality framework integrates real-time inspection and post-production testing. Samples are evaluated for hardness, elongation, tensile strength, and curing uniformity, while random sampling safeguards dimensional and process stability.
Detailed reports, complete with performance graphs that outline temperature and curing time measures, ensuring that the final products deliver optimal performance and reliability in their intended applications. Every report includes test data confirming batch consistency and curing control.
Each batch is fully traceable and supported by certified documentation, including Certificates of Analysis (CoA), batch records, and compliance reports verifying conformity with FDA, USP Class VI, RoHS, and REACH standards. This ensures consistent reliability across medical, automotive, industrial, and food-grade applications.
| Documentation Type | Purpose |
|---|---|
| Certificates of Analysis (CoA) | Verification of mechanical, thermal, and chemical properties for each batch |
| Batch Records | Detailed documentation of formulation, processing conditions, and laboratory test data |
| Compliance Documentation | Proof of conformity with ISO, DIN, JIS, and sector-specific regulatory standards |