Structured Manufacturing Data (2026)

Optical Silicone Rubber

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Optical Silicone Rubber used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Optical Silicone Rubber is characterized by the integration of Base Polymer and Cross-linking System. In industrial production environments, manufacturers listed on CNFX commonly emphasize Polydimethylsiloxane (PDMS) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A specialized silicone rubber formulation engineered for optical applications requiring high transparency, light transmission, and environmental stability.

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Product Specifications

Technical details and manufacturing context for Optical Silicone Rubber

Definition
Optical silicone rubber is a high-performance elastomeric material specifically designed for optical and photonic applications. It is formulated from polydimethylsiloxane (PDMS) or similar silicone polymers with carefully controlled additives to achieve exceptional optical clarity, high light transmittance across visible and near-infrared spectra, and minimal light scattering. This material maintains its optical properties under various environmental conditions including temperature fluctuations, humidity, and UV exposure, making it suitable for demanding optical systems.
Working Principle
Optical silicone rubber functions as a transparent medium for light transmission and protection in optical systems. Its molecular structure provides high transparency by minimizing light scattering through controlled cross-linking and absence of crystalline regions. The material's refractive index can be tuned through formulation adjustments to match specific optical requirements. It serves as protective encapsulation, optical coupling, or light-guiding elements while maintaining mechanical flexibility and environmental resistance.
Common Materials
Polydimethylsiloxane (PDMS), Cross-linking agents, Optical-grade fillers, Stabilizers
Technical Parameters
  • Light transmittance at 550nm wavelength (%) Per Request
Components / BOM
  • Base Polymer Part
    Primary silicone polymer providing optical clarity and mechanical properties
    Material: Polydimethylsiloxane (PDMS) or similar silicone polymer
  • Cross-linking System Part
    Enables curing and network formation while maintaining optical clarity
    Material: Platinum catalyst or peroxide-based curing agents
  • Optical Modifiers Part
    Adjust refractive index and control light transmission properties
    Material: Specialty siloxanes or organic modifiers
  • Stabilizers Part
    Protect against UV degradation and thermal aging
    Material: UV absorbers, antioxidants, and thermal stabilizers
  • Release Agents Part
    Facilitate demolding during manufacturing
    Material: Internal mold release additives

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Optical Silicone Rubber.

Optical Grade Silicone Clear Silicone Elastomer Transparent Silicone Rubber Optical PDMS high transparency optical silicone rubber optical-grade PDMS silicone rubber silicone rubber for light transmission applications environmentally stable optical silicone transparent silicone rubber for electronics

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar (145 psi) static, 5 bar (72.5 psi) dynamic
other spec: Light transmission >90% (400-700 nm), Refractive index 1.41-1.43, Shore A hardness 30-80
temperature: -60°C to +200°C continuous, up to +250°C intermittent
Media Compatibility
✓ Optical adhesives and sealants ✓ LED encapsulation materials ✓ Medical device optical components
Unsuitable: Concentrated acids or bases, strong oxidizing agents, aromatic hydrocarbons
Sizing Data Required
  • Required optical clarity specifications (transmission %, haze level)
  • Application geometry and thickness requirements
  • Environmental exposure conditions (UV, ozone, temperature cycling)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Optical clouding/hazing
Cause: UV degradation from prolonged exposure to sunlight or artificial UV sources, causing polymer chain scission and loss of transparency
Surface tackiness/softening
Cause: Plasticizer migration or absorption of contaminants (oils, solvents) that swell the silicone matrix, compromising mechanical integrity
Maintenance Indicators
  • Visible yellowing or milky haze formation in previously clear sections
  • Tacky surface texture or visible surface degradation when wiped with clean lint-free cloth
Engineering Tips
  • Apply UV-protective coatings specifically formulated for optical silicones and maintain regular reapplication schedules
  • Implement strict handling protocols using cleanroom gloves and tools to prevent contamination from oils, solvents, or particulate matter

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASTM D2000 - Standard Classification System for Rubber Products CE Marking - EU Regulation 2017/745 for Medical Devices (if applicable)
Manufacturing Precision
  • Surface Roughness: Ra ≤ 0.4 μm
  • Dimensional Stability: ±0.05 mm over 24h at 150°C
Quality Inspection
  • Transmittance/Clarity Test (per ASTM D1003)
  • Hardness Durometer Test (Shore A scale per ASTM D2240)

Factories Producing Optical Silicone Rubber

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Main Processor Board

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Alignment Sensor Array

A multi-sensor component that detects and measures positional alignment in industrial systems.

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Frequently Asked Questions

What makes this silicone rubber suitable for optical applications?

This optical silicone rubber is formulated with PDMS and optical-grade fillers to achieve high transparency (>90% transmittance), low haze, and consistent refractive index, making it ideal for lenses, light guides, and protective covers in electronic and optical devices.

How does it perform in extreme temperatures?

With a broad operating temperature range and stabilizers, it maintains optical clarity and mechanical properties from -50°C to 200°C, ensuring reliability in demanding environments like automotive sensors or outdoor displays.

Can it be customized for specific optical properties?

Yes, by adjusting the cross-linking system and optical modifiers, we can tailor hardness, refractive index, and transmittance to meet precise requirements for applications such as LED encapsulation or medical imaging components.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Computer, Electronic and Optical Product Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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