JOKER INDUSTRIAL LSR
Automotive
Headlamp inner and outer lenses, daytime running light guides, connector seals and cable wire seals for cars and motorcycles.
JOKER INDUSTRIAL LSR
JOKER LSR: Automotive LSR Optical Lens Manufacturer
JOKER INDUSTRIAL is an automotive LSR optical lens manufacturer in Taiwan. We inject mold liquid silicone rubber (LSR) into non-yellowing headlamp lenses, precision seals, and cosmetic and medical components. OEM/ODM support covers mold design, sampling and mass production in one place.
Optical-grade clarity. Seal-grade reliability.
- ~95%Light transmittance
- -40–230 °CService temperature
- ISO 13485:2016Certified quality system
- OEM/ODMFrom mold design to mass production
LSR optical inner lensJOKER LSR
Materials
Why Choose Liquid Silicone Rubber (LSR) Injection Molding
Liquid silicone rubber (LSR) is a non-toxic, odorless and chemically inert silicone. It is injection molded from two liquid components (A and B) and cures rapidly in the mold, so lenses and seals stay clear, elastic and stable from -40 °C to 230 °C.
Wide temperature range
Withstands -40 °C to 230 °C, with no yellowing after hot and cold cycle tests.
High light transmittance
About 95%, meeting transparency, haze and diffusion requirements. Transmittance stayed essentially unchanged in UV aging tests of up to 6,000 hours.
UV, weather and crack resistance
Lenses keep their clarity outdoors and under heat, unlike heat-resistant plastics that tend to yellow.
Waterproof and electrically insulating
Suited to sealed connectors and electronic housings.
Elastic and malleable
Supports hyperboloid and free-form optical surfaces and micro-structure designs.
Non-toxic and biocompatible
LSR materials carry safety recognitions such as FDA, NSF, MIL and UL. The grade is selected for each project.
Highly automated molding with no by-products during vulcanization, for consistent quality and long service life.
Green process
Open cold runner tooling leaves no runner waste, LSR emits no VOC or PAH, and it produces no NOx or SO2 when burned.
LSR vs. PC, PMMA and glass
Values from the JOKER LSR presentation.
| Property | LSR | PC | PMMA | Glass |
|---|---|---|---|---|
| Light transmittance (%) | 95 | 86-89 | 89-92 | 92 |
| Refractive index | 1.41 | 1.59 | 1.49 | 1.5-1.6 |
| Haze (%) | <1 | 1-3 | 2-4 | - |
| Abbe number | 50 | 34 | 57 | 39-59 |
| Yellowness index | <1 | 1.0-3.0 | 1.0-3.0 | - |
| Heat resistance | Excellent | Poor | Poor | Excellent |
| UV resistance | Excellent | Poor | Good | Excellent |
| Micro-structure capability | Excellent | Good | Good | Poor |
| Material elasticity | Excellent | Poor | Poor | Poor |
| Light-weight design | Excellent | Good | Good | Poor |
How we mold and deliver
Closed-loop LIM process: ELMET dosing units feed and mix parts A and B, a Wittmann Battenfeld LSR injection machine injects the mix into an open cold runner mold, and the part vulcanizes rapidly.
- Share your 2D or 3D data
- Flow analysis and mold design
- In-house CNC and EDM tooling, then sampling
- Trial run, mold acceptance and mass production
Facilities
8 Wittmann Battenfeld LSR injection machines, 8 ELMET dosing units, a Class 300,000 dust-free workshop, in-house mold machining, and a constant temperature and humidity warehouse.
Production sites
Changhua, Taiwan
FAQ
What is liquid silicone rubber (LSR)?
LSR is a two-part, low-viscosity silicone. An ELMET dosing unit mixes parts A and B, a Wittmann Battenfeld machine injects the mix into the mold, and it vulcanizes rapidly. The material is non-toxic, odorless, weather-resistant and chemically inert.
Why use LSR instead of PC or PMMA for automotive lenses?
LSR offers about 95% light transmittance with a yellowness index below 1. It withstands up to 230 °C, while PC and PMMA are limited to under 100 °C, so it does not melt or deform in compact, high-heat LED modules.
What temperature range can LSR parts handle?
LSR parts are designed for use from -40 °C to 230 °C. In cold and hot cycle tests, JOKER's inner and outer headlamp lenses showed no yellowing or cracking.
Does JOKER have medical certification for LSR components?
Yes. JOKER INDUSTRIAL holds ISO 13485:2016 certification. JOKER supplies components, not finished medical devices.
Does JOKER provide OEM/ODM LSR molding?
Yes. JOKER handles mold flow analysis, open cold runner mold design, in-house mold machining, sampling, trial runs and mass production for OEM and ODM customers.
Industries
LSR Parts for Automotive, Medical, Cosmetic and Electronics Industries
JOKER molds LSR parts for customers that need optical clarity, reliable sealing or skin-safe materials. Our three product lines serve the industries below.
Medical
Medical grade LSR components such as seals, gaskets, optical-grade lenses and wearable interfaces, made under an ISO 13485:2016 quality system. Typical uses include syringes, drug delivery, dialysis and respiratory devices.
Cosmetics and personal care
Soft, odorless, non-toxic silicone dropper teats and caps in custom colors.
Electronics and wearables
Waterproof gaskets, keypad membranes, thermal interface pads and smartwatch lenses.
Laser, drone and lighting optics
Laser optical lenses, and lenses for outdoor, street and architectural lighting.
Sanitary and water systems
O-rings for premium faucet and water-system brands in Europe and North America.
Products
Automotive LSR Optical Lens, Seal and Medical Product Range
Automotive lighting and lenses
LSR optical lenses for headlamps and lighting modules, with high transmittance and no yellowing. These silicone headlight lens products suit cars, motorcycles and compact LED modules.
LSR Optical Silicone Lens
Outer lenses, high-beam and low-beam inner lenses, light-guide pillars for daytime running lamps, and multi-function light-guide lenses. Impact-resistant, chemically stable, UV-resistant and non-yellowing, with custom designs on request.
LSR Optical Silicone Lens
Outer lenses, high-beam and low-beam inner lenses, light-guide pillars for daytime running lamps, and multi-function light-guide lenses. Impact-resistant, chemically stable, UV-resistant and non-yellowing, with custom designs on request.
Key features
- Impact resistant
- Chemically stable
- Keeps optical clarity across wide temperature ranges
- UV resistant and non-yellowing
- Flexible design with a secure fit
Variants
- Outer lens
- High-beam inner lens
- Low-beam inner lens
- Light-guide pillar for daytime running lamps
- Multi-function light-guide lens
- Custom lens
Typical applications
- Automotive headlamps and lighting systems
- Medical devices such as endoscopic equipment and surgical lighting
- Wearables such as smartwatches and fitness trackers
- Outdoor lighting such as streetlights and architectural lighting
Request a quote with your drawings and volume.
Request a quote
LSR Headlight Module Lens
Silicone meniscus lenses for automobile and motorcycle headlight modules. About 95% light transmittance, free-form designs, and stable light flux in hot and humid conditions.
LSR Headlight Module Lens
Silicone meniscus lenses for automobile and motorcycle headlight modules. About 95% light transmittance, free-form designs, and stable light flux in hot and humid conditions.
Key features
- About 95% light transmittance
- Resistant to UV radiation and extreme temperatures
- Free-form lens designs
- Stable light flux in hot and humid conditions
Typical applications
- Automobile and motorcycle headlight modules
- LED lighting systems
Request a quote with your drawings and volume.
Request a quoteLSR Optical Laser Lens
OEM/ODM lenses for laser applications and high-temperature environments. Non-yellowing from -40 °C to 230 °C, with high transmittance and hyperboloid or free-form surfaces.
LSR Optical Laser Lens
OEM/ODM lenses for laser applications and high-temperature environments. Non-yellowing from -40 °C to 230 °C, with high transmittance and hyperboloid or free-form surfaces.
Key features
- Non-yellowing from -40 °C to 230 °C
- Impact, weather and UV resistant
- Waterproof with good electrical performance
- About 95% light transmittance
- No vulcanization by-products
- Supports hyperboloid and free-form surfaces
Typical applications
- Laser optical systems
- Headlight modules and automotive components
- Medical devices
- Electronics
Request a quote with your drawings and volume.
Request a quoteSeals
LSR seal rings, silicone O-rings and wire seals that stay elastic and resist heat, chemicals and UV. Custom shapes and colors are available.
LSR Silicone O-Ring
Elastic O-rings with low compression set, resistance to oils, acids and solvents, and service temperatures beyond 200 °C. Custom colors for automotive, medical, industrial and faucet applications.
LSR Silicone O-Ring
Elastic O-rings with low compression set, resistance to oils, acids and solvents, and service temperatures beyond 200 °C. Custom colors for automotive, medical, industrial and faucet applications.
Key features
- Works from cryogenic temperatures to over 200 °C
- Resists oils, acids and solvents
- Stays elastic after repeated deformation
- Low compression set
- Biocompatible
Typical applications
- Automotive air conditioning, engine, transmission and fuel systems
- Medical syringes, drug delivery, dialysis and respiratory devices
- Industrial hydraulic and pneumatic systems, rotating equipment and valves
- Water systems and faucet hardware
Request a quote with your drawings and volume.
Request a quote
LSR Seal Ring
Precision seal rings molded by liquid injection molding (LIM) on Wittmann Battenfeld machines. High elasticity, thermal stability, and resistance to chemicals, UV, ozone and moisture.
LSR Seal Ring
Precision seal rings molded by liquid injection molding (LIM) on Wittmann Battenfeld machines. High elasticity, thermal stability, and resistance to chemicals, UV, ozone and moisture.
Key features
- High elasticity under repeated stress
- Thermal stability from cryogenic conditions to over 200 °C
- Resists chemicals, UV, ozone and moisture
- Biocompatible
- Low compression set
Typical applications
- Automotive engines, transmissions, exhaust systems and electrical connectors
- Medical drug delivery and fluid management
- Electronics connectors, insulators and protective housings
Request a quote with your drawings and volume.
Request a quote
Multi-Wire Seal Connector
Multi-hole LSR seals for automotive, marine and outdoor connectors. Waterproof and dustproof, resistant to oil, fuel and solvents, with vibration absorption.
Multi-Wire Seal Connector
Multi-hole LSR seals for automotive, marine and outdoor connectors. Waterproof and dustproof, resistant to oil, fuel and solvents, with vibration absorption.
Key features
- Waterproof
- Resists oils, fuels and solvents
- Absorbs vibration and mechanical stress
- Dustproof and UV resistant
Typical applications
- Automotive connectors
- Marine applications
- Outdoor installations
Request a quote with your drawings and volume.
Request a quote
Automotive Cable Wire Seal
Self-lubricating LSR wire seals with electrical and thermal insulation, plus ozone and UV resistance. Clear or custom colors, for engine and electrical systems.
Automotive Cable Wire Seal
Self-lubricating LSR wire seals with electrical and thermal insulation, plus ozone and UV resistance. Clear or custom colors, for engine and electrical systems.
Key features
- Electrical and thermal insulation
- Ozone and UV resistant with high elongation
- Self-lubricating for easier assembly
- Clear or custom colors
Typical applications
- Engine components and seals
- Vibration dampeners
- Exterior parts and gaskets exposed to harsh environments
- Electrical system protection
Request a quote with your drawings and volume.
Request a quoteCosmetic and medical products
Skin-safe, odorless LSR components, including medical grade LSR components made under an ISO 13485:2016 quality system.
LSR Dropper Teats and Caps
Soft, odorless, non-toxic silicone teats and caps for cosmetic and pharmaceutical droppers, in custom colors.
LSR Dropper Teats and Caps
Soft, odorless, non-toxic silicone teats and caps for cosmetic and pharmaceutical droppers, in custom colors.
Key features
- Soft, odorless and non-toxic
- Custom colors
Typical applications
- Cosmetic droppers
- Pharmaceutical droppers
Request a quote with your drawings and volume.
Request a quote
Medical Grade LSR Components
Seals, gaskets, optical-grade lenses and wearable interfaces molded to your drawings under an ISO 13485:2016 quality system, with batch traceability. JOKER supplies components, not finished devices.
Medical Grade LSR Components
Seals, gaskets, optical-grade lenses and wearable interfaces molded to your drawings under an ISO 13485:2016 quality system, with batch traceability. JOKER supplies components, not finished devices.
Key features
- Molded to your drawings
- Made under an ISO 13485:2016 quality system
- Batch traceability
- JOKER supplies components, not finished devices
Typical applications
- Seals, gaskets and diaphragms
- Optical-grade lenses
- Wearable interfaces
- Syringes, drug delivery, dialysis and respiratory devices
Request a quote with your drawings and volume.
Request a quoteCertifications & Quality
Certified Quality: ISO 13485 and In-House Testing
Quality at JOKER is documented, traceable and tested in-house. Our medical grade LSR components are produced under an ISO 13485:2016 quality system, backed by light distribution, aging and electrical test rooms.
ISO 9001:2015
IATF 16949:2016
ISO 13485:2016
ISO 14001:2015
ISO 45001:2018
In-process quality control and final inspection with batch traceability, and risk management built into the quality system.
In-house testing
Automotive lighting light distribution testing, precision light detection, LED module color and electrical testing, accelerated aging life testing, automotive electronic immunity testing and a power failure simulator.
Material safety recognitions
LSR materials are available with FDA, NSF, MIL and UL recognitions. These apply to the material, not to JOKER as a company, and the grade is selected for each project.
News
Latest News
Updates from JOKER INDUSTRIAL on LSR certification and manufacturing.
JOKER INDUSTRIAL Achieves ISO 13485 Certification for Precision LSR Component Manufacturing
JOKER INDUSTRIAL announced its ISO 13485:2016 certification. As a precision parts supplier rather than a finished device maker, JOKER produces LSR components for medical, electronics and automotive customers, with in-process quality control, final inspection and batch traceability.
JOKER INDUSTRIAL Achieves ISO 13485 Certification for Precision LSR Component Manufacturing
JOKER INDUSTRIAL CO., LTD. has attained ISO 13485:2016 certification. JOKER is a precision parts supplier, not a finished device manufacturer. Our LSR components go into customers' assemblies in the medical, electronics and automotive markets.
What our quality system includes
- In-process quality control and final inspection
- Batch traceability from raw silicone to delivery
- Risk management integrated across design and production
Where our LSR components are used
- Medical devices (seals, gaskets, diaphragms and O-rings for fluid management and drug delivery
- Optical-grade silicone lenses and wearable interfaces)
- Electronics (waterproof gaskets, keypad membranes, thermal interface pads and connector boots)
- Automotive (engine seals, sensor covers and EV battery module sealing)
In-house mold design and machining
- We design and machine our molds in-house with CNC and EDM, which gives tight tolerances, short lead times and control over cost
- Open cold runner tooling keeps filling stable in multi-cavity molds and reduces waste
Production and quality assurance
- Parts are molded on Wittmann Battenfeld machines with open cold runner tooling in a cleanroom-ready environment
- Every batch is traceable and inspected to ISO 13485 and customer-specific requirements
If you are an engineer or buyer in the medical, electronics or automotive field, send us your drawings through the contact form and we will reply with sampling and quotation options.
JOKER Industrial: Leading in LSR Manufacturing Solutions
Why LSR suits medical, automotive, electronics and LED lighting parts: stable from -40 °C to 230 °C, chemically stable, biocompatible, transparent and cleaner to process. JOKER molds it with ELMET dosing units and Wittmann Battenfeld machines in a Class 300,000 dust-free workshop.
JOKER Industrial: Leading in LSR Manufacturing Solutions
Liquid silicone rubber (LSR) has become an essential material for medical devices, automotive parts, electronics and LED lighting.
Why LSR compared with TPE, NR, NBR, PU and EPDM
- Stable from -40 °C to 230 °C
- Resists acids, alkalis and oils
- Biocompatible, non-toxic and odorless
- High clarity with UV resistance, so it does not yellow
- Lower carbon footprint, no VOC or PAH emissions, and no NOx or SO2 when burned
Where LSR is used
Medical catheters, automotive cable seals, LED lenses and seals, concave and convex optical lenses, O-rings for many industries, and electronic component seals.
The molding challenge
LSR has low viscosity and cures quickly, so temperature and timing must be controlled precisely, and mold design is critical for high-precision parts.
Equipment and facilities
- Liquid injection molding (LIM) with ELMET dosing units and Wittmann Battenfeld machines
- A Class 300,000 dust-free workshop, a constant temperature and humidity warehouse, a light distribution testing room and a dedicated silicone mold workshop
Customization
ODM and OEM production, with a focus on sustainable products.
Contact
Request a Quote for LSR Molding
Send us your drawings, application and annual volume. JOKER's LSR sales team will review your request and reply with sampling and quotation options.