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The IOTA LSR 3G30 Series includes six hardness grades from Shore A 30 to Shore A 80, allowing manufacturers to select different mechanical properties according to product design and processing requirements.
| Property | IOTA 3G30 | IOTA 3G40 | IOTA 3G50 | IOTA 3G60 | IOTA 3G70 | IOTA 3G80 |
|---|---|---|---|---|---|---|
| Appearance | Colorless & Transparent | Colorless & Transparent | Colorless & Transparent | Colorless & Transparent | Colorless & Transparent | Colorless & Transparent |
| Viscosity at 25°C | 50,000 mPa·s | 50,000 mPa·s | 40,000 mPa·s | 40,000 mPa·s | 35,000 mPa·s | 40,000 mPa·s |
| Hardness | Shore A 30 | Shore A 40 | Shore A 50 | Shore A 60 | Shore A 70 | Shore A 80 |
| Tensile Strength | 1.8 MPa | 3.0 MPa | 4.0 MPa | 5.0 MPa | 6.5 MPa | 8.0 MPa |
| Elongation | 150% | 160% | 180% | 180% | 150% | 50% |
| Tear Strength | 6 kN/m | 8 kN/m | 10 kN/m | 10 kN/m | 12 kN/m | 12 kN/m |
| Light Transmittance | 92% | 92% | 92% | 92% | 92% | 92% |
| Test Condition | 450 nm, 2 mm | 450 nm, 2 mm | 450 nm, 2 mm | 450 nm, 2 mm | 450 nm, 2 mm | 450 nm, 2 mm |
| Density | 1.00 g/cm³ | 1.01 g/cm³ | 1.01 g/cm³ | 1.02 g/cm³ | 1.03 g/cm³ | 1.05 g/cm³ |
| Refractive Index | 1.41 | 1.41 | 1.41 | 1.41 | 1.41 | 1.41 |
Optical liquid silicone rubber is a transparent silicone material developed for applications where optical transparency, light transmission, environmental resistance and flexible processing are important.
IOTA LSR 3G30 Series is a colorless and transparent liquid silicone rubber available in six hardness grades.
The series combines optical properties with silicone rubber characteristics, making it suitable for manufacturing transparent or optical components through injection and pouring processes.
The material is designed for applications including:
Optical lenses
Secondary optical lenses
Light-guiding devices
Transparent products
Automotive lighting components
High-definition display-related applications
Other transparent silicone components
All six grades of IOTA LSR 3G30 Series have a light transmittance of 92% at 450 nm with a 2 mm sample thickness.
This means that IOTA 3G30, 3G40, 3G50, 3G60, 3G70 and 3G80 all share the same stated light-transmittance value under this test condition.
The combination of colorless transparency and 92% light transmittance makes the series suitable for applications where the silicone component needs to transmit visible light.
When evaluating optical silicone, light transmittance should always be considered together with:
Wavelength
Sample thickness
Optical path
Refractive index
Product geometry
Surface quality
Therefore, the 92% value should be understood specifically as the stated result at 450 nm and 2 mm thickness, rather than as a universal transmission value for every wavelength and product thickness.
The stated refractive index of all six IOTA LSR 3G30 Series grades is 1.41.
| Grade | Refractive Index |
|---|---|
| IOTA 3G30 | 1.41 |
| IOTA 3G40 | 1.41 |
| IOTA 3G50 | 1.41 |
| IOTA 3G60 | 1.41 |
| IOTA 3G70 | 1.41 |
| IOTA 3G80 | 1.41 |
A consistent refractive index across the series provides a common optical reference when comparing the six hardness grades.
For optical component development, the refractive index should be evaluated together with the optical design, substrate, lens geometry and light source.
IOTA LSR 3G30 Series provides six hardness options:
Shore A 30, 40, 50, 60, 70 and 80.
This range allows manufacturers to select different mechanical characteristics according to the structure and function of the finished component.
IOTA 3G30 has a Shore A hardness of 30, with:
Tensile strength: 1.8 MPa
Elongation: 150%
Tear strength: 6 kN/m
This grade represents the softer end of the 3G30 Series.
IOTA 3G40 has:
Shore A hardness: 40
Tensile strength: 3.0 MPa
Elongation: 160%
Tear strength: 8 kN/m
IOTA 3G50 has:
Shore A hardness: 50
Tensile strength: 4.0 MPa
Elongation: 180%
Tear strength: 10 kN/m
IOTA 3G60 has:
Shore A hardness: 60
Tensile strength: 5.0 MPa
Elongation: 180%
Tear strength: 10 kN/m
IOTA 3G70 has:
Shore A hardness: 70
Tensile strength: 6.5 MPa
Elongation: 150%
Tear strength: 12 kN/m
IOTA 3G80 has:
Shore A hardness: 80
Tensile strength: 8.0 MPa
Elongation: 50%
Tear strength: 12 kN/m
The six grades provide different combinations of hardness, tensile strength, elongation and tear strength, allowing the material to be evaluated according to the mechanical requirements of the finished optical component.
The mechanical properties vary across the six grades.
Tensile strength increases from 1.8 MPa for IOTA 3G30 to 8.0 MPa for IOTA 3G80.
Tear strength increases from 6 kN/m for IOTA 3G30 to 12 kN/m for IOTA 3G70 and IOTA 3G80.
Elongation ranges from 50% to 180%, with the highest stated elongation of 180% for IOTA 3G50 and IOTA 3G60.
These differences are important when selecting an optical silicone material because optical transparency alone does not determine whether a particular grade is appropriate for a specific component.
IOTA LSR 3G30 Series can be used in the automotive lighting field.
Automotive lighting components may require a combination of:
Light transmission
Optical transparency
UV resistance
Heat resistance
Mechanical durability
Moldability
Dimensional consistency
The 3G30 Series is designed with optical transparency, UV resistance and heat resistance as key material characteristics.
The appropriate grade should be evaluated according to the component geometry, optical requirements, mechanical requirements and operating environment.
IOTA LSR 3G30 Series is also positioned for the high-definition display field.
Transparent silicone materials can be considered for applications where light transmission and optical properties are important.
For display-related applications, material selection should consider:
Light transmission
Refractive index
Component thickness
Optical clarity
Surface quality
Mechanical requirements
Thermal and UV exposure
The 3G30 Series provides a stated refractive index of 1.41 and light transmittance of 92% at 450 nm and 2 mm thickness.
IOTA LSR 3G30 Series is suitable for manufacturing optical lenses and light-guiding components.
The product information identifies applications including:
Secondary optical lenses
Nose pads
Light guides
Transparent components
Optical products
Its combination of optical transparency and liquid processing capability allows manufacturers to produce components with different structures through injection or pouring processes.
Optical silicone is not selected only according to optical properties.
The material must also be processed into the required component geometry.
IOTA LSR 3G30 Series provides good processability and moldability and can be used with:
Injection processes
Pouring processes
This allows manufacturers to produce silicone components with different structures.
Processing conditions should be optimized according to:
Mold design
Component geometry
Material viscosity
Required surface quality
Curing conditions
Production equipment
The viscosity of the six grades ranges from 35,000 to 50,000 mPa·s at 25°C.
| Grade | Viscosity at 25°C |
|---|---|
| IOTA 3G30 | 50,000 mPa·s |
| IOTA 3G40 | 50,000 mPa·s |
| IOTA 3G50 | 40,000 mPa·s |
| IOTA 3G60 | 40,000 mPa·s |
| IOTA 3G70 | 35,000 mPa·s |
| IOTA 3G80 | 40,000 mPa·s |
Viscosity is an important processing parameter because it affects material flow, mold filling and processing behavior.
When selecting an optical liquid silicone rubber, manufacturers should evaluate viscosity together with the mold structure and processing equipment.
IOTA LSR 3G30 Series is designed with UV resistance and heat resistance as key material characteristics.
These properties are particularly relevant to optical components that may be exposed to light, outdoor environments or elevated temperatures during service.
For applications involving specific temperature ranges or long-term UV exposure, manufacturers should conduct application-specific testing rather than relying only on general material descriptions.
IOTA LSR 3G30 Series is a platinum-catalyzed liquid silicone rubber.
The platinum-catalyzed system is part of the material design and is also identified by the product information as applicable to food-industry applications.
For applications involving direct food contact or other regulated uses, the finished product should still be evaluated against the specific regulations and testing requirements of the target market.
The six grades should be selected according to the required combination of optical and mechanical properties.
A practical selection process can start with the following questions:
The available hardness grades are:
Shore A 30 / 40 / 50 / 60 / 70 / 80
The required hardness depends on the component structure and mechanical function.
The tensile strength ranges from:
1.8 MPa to 8.0 MPa
Higher-hardness grades generally provide higher stated tensile strength within this product series.
The stated elongation ranges from:
50% to 180%
IOTA 3G50 and IOTA 3G60 have the highest stated elongation at 180%.
The stated tear strength ranges from:
6 to 12 kN/m
IOTA 3G70 and IOTA 3G80 have the highest stated tear strength at 12 kN/m.
All six grades have the same stated:
Light transmittance: 92% at 450 nm and 2 mm
Refractive index: 1.41
Therefore, the main distinction between the grades is not the stated light transmittance or refractive index, but their different mechanical properties and hardness.
The following table provides a concise reference for the complete series:
| Property | IOTA 3G30 | IOTA 3G40 | IOTA 3G50 | IOTA 3G60 | IOTA 3G70 | IOTA 3G80 |
|---|---|---|---|---|---|---|
| Hardness (Shore A) | 30 | 40 | 50 | 60 | 70 | 80 |
| Viscosity (mPa·s, 25°C) | 50,000 | 50,000 | 40,000 | 40,000 | 35,000 | 40,000 |
| Tensile Strength (MPa) | 1.8 | 3.0 | 4.0 | 5.0 | 6.5 | 8.0 |
| Elongation (%) | 150 | 160 | 180 | 180 | 150 | 50 |
| Tear Strength (kN/m) | 6 | 8 | 10 | 10 | 12 | 12 |
| Light Transmittance (%) | 92 | 92 | 92 | 92 | 92 | 92 |
| Light Transmittance Test | 450 nm / 2 mm | 450 nm / 2 mm | 450 nm / 2 mm | 450 nm / 2 mm | 450 nm / 2 mm | 450 nm / 2 mm |
| Density (g/cm³) | 1.00 | 1.01 | 1.01 | 1.02 | 1.03 | 1.05 |
| Refractive Index | 1.41 | 1.41 | 1.41 | 1.41 | 1.41 | 1.41 |
IOTA LSR 3G30 Series is a colorless and transparent optical liquid silicone rubber available in six grades with Shore A hardness from 30 to 80.
All six grades have a stated light transmittance of 92% at 450 nm with a 2 mm sample thickness.
The stated refractive index of all six grades is 1.41.
The series includes Shore A 30, 40, 50, 60, 70 and 80.
The viscosity ranges from 35,000 to 50,000 mPa·s at 25°C, depending on the grade.
The tensile strength ranges from 1.8 MPa to 8.0 MPa across the six grades.
The stated elongation ranges from 50% to 180%. IOTA 3G50 and IOTA 3G60 have the highest stated elongation at 180%.
The stated tear strength ranges from 6 to 12 kN/m.
Yes. The product is designed for optical applications including optical lenses, secondary optical lenses and light-guiding devices.
Yes. Automotive lighting is one of the stated application fields for the 3G30 Series.
Yes. The product is also positioned for the high-definition display field.
The material is described as suitable for injection and pouring processes.
Yes. UV resistance is one of the listed material characteristics.
Heat resistance is one of the listed features of the product. Specific operating-temperature requirements should be evaluated through application testing.
Yes. The product is described as a platinum-catalyzed liquid silicone rubber.
IOTA LSR 3G30 Series combines 92% light transmittance at 450 nm and 2 mm thickness with a refractive index of 1.41, six Shore A hardness grades from 30 to 80, and suitability for injection and pouring processes.
The series provides different mechanical-property combinations, with:
Tensile strength from 1.8 to 8.0 MPa
Elongation from 50% to 180%
Tear strength from 6 to 12 kN/m
Viscosity from 35,000 to 50,000 mPa·s at 25°C
Density from 1.00 to 1.05 g/cm³
These characteristics make IOTA LSR 3G30 Series suitable for evaluating applications involving optical lenses, light guides, automotive lighting, high-definition display components and other transparent silicone products.
For material selection, the required optical performance, hardness, mechanical properties, component geometry and processing method should be considered together.
