Optical & Clear Injection Molding
The Science of Perfect Transparency
Eliminating Optical Birefringence
Molding clear plastics like Polycarbonate (PC) or Acrylic (PMMA) is drastically different from molding opaque resins. The primary challenge is internal stress, which causes birefringence—an optical defect where light refracts improperly, leading to distorted visibility or rainbow effects under polarized light.
Our engineers expertly manipulate injection speeds, melt temperatures, and holding pressures across our 35+ advanced presses to ensure a uniform, stress-free molecular flow, resulting in optically perfect lenses and light pipes.
Zero Dust. Zero Black Specks.
In clear molding, a single microscopic dust particle or burnt resin speck (black speck) renders the entire part a reject. This is especially critical for ISO 13485 medical diagnostic components.
To combat this, we execute clear molding projects within our ISO Class 8 Cleanroom environment. We utilize specialized purged resin drying systems and dedicated all-electric injection machines to ensure absolutely zero particulate contamination.
The Secret is in the Steel: SPI A-1 Finishes
25+ 5-Axis CNCs
SPI A-1 Diamond Polish
Zeiss CMM Inspection
Selecting the Right Optical Polymer
| Material | Key Characteristics | Primary Applications |
|---|---|---|
| PMMA (Acrylic) | Highest light transmission (92%), exceptional UV and scratch resistance. Brittle compared to PC. | Lenses, display screens, outdoor light covers, fiber optics. |
| PC (Polycarbonate) | Virtually unbreakable impact resistance, good clarity (88%). Prone to scratching without coatings. | Automotive headlamps, safety goggles, rugged electronic displays. |
| COP / COC (Cyclo Olefin) | Medical-grade purity, extreme moisture barrier, low birefringence, high UV transmission. | Medical diagnostics, cuvettes, microfluidic chips, sterile packaging. |
| Optical LSR (Silicone) | Will not yellow or degrade under extreme heat or UV. Flexible and optically clear. | High-power LED lenses, flexible light guides, outdoor automotive lighting. |
Clear Proof: Industry Applications
Automotive Lighting
Under IATF 16949 standards, we mold thick-walled PC headlight lenses and complex LED light pipes with zero flow marks or sink defects.
Medical Diagnostics
ISO 13485 certified cleanroom molding for COP/COC cuvettes and microfluidics, ensuring zero dust for accurate laser or optical sensor readings.
Consumer Electronics
Flawless PMMA and PC displays, VR headset lenses, and wearable device covers requiring Class-A aesthetic finishes and high scratch resistance.