Photochromic Sheet & Film
WeeTect Photochromic Sheet & Film (WPSF) also names photochromic plastic sheet & film, photochromic film. It is made from optical polycarbonate sheet and photochromic film with special photochromic technology. WeeTect Photochromic Sheet & Film (WPSF) can be applied to photochromic lenses, photochromic sunglasses, polarized photochromic sunglasses, photochromic safety glasses, photochromic glass sheet, photochromic goggles, photochromic motorcycle helmet visor, helmet visor insert, football visor ,photochromic spectacles etc.
At the same time, it is a perfect candidate to automatically adjust the visibility of augmented reality headset under sunlight. Such as optical head mounted display, augmented reality head up display, augmented reality head mounted display.
As WeeTect is a high end photochromic lens manufacturer, WeeTect Photochromic Sheet & Film (WPSF) is one of the best photochromic sheets with super high VLT when it is photochromic clear in house, and turns to photochromic tint on exposure to UV light quickly. At the same time, WeeTect Photochromic Sheet & Film (WPSF) offers options to add polarized feature and more surface treatment such as anti-fog coating, anti-scratch coating, anti-fingerprint coating and more. It can be applied to photochromic polarized sunglasses, photochromic polarized lenses as well. In advance, WeeTect is glad to co-develop other special features such as ballistic to support your niche market.
Photochromic Sheet, Photochromic Film Review of Advantages:
- Convenience: you only need to offer your customer one pair of photochromic goggles for the varying light conditions.
- UV protection: photochromic Sheet and photochromic Film absorbs 100% harmful UV radiation.
- One stop solution: WeeTect Photochromic Sheet & Film (WPSF) also offers anti-fog coating, hard coating, abrasion resistant coating, anti-fingerprint coating or other color tinting.
- Reduce cost: WeeTect is a capable photochromic lens manufacturer to share cost advantage to you
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PS: Here is a photochromic ebook for you to learn more about photochromic technology
| Item | Property | Test Method | U/M | Value |
| Optical | UV Resistant | EN170 | % | 99.99% |
| Haze | ASTM D 1003 | % | 0.37 | |
| VLT Before Photochromic Tint | ASTM D 1003 | % | 87 | |
| VLT Fully Photochromic Tint | ASTM D 1003 | % | 20 | |
| Fully Photochromic Tint Time | WeeTect Method | Second | 30 | |
| Change Back to Photochromic Clear Time | WeeTect Method | Minutes | 3 | |
| Fog Free time | ECE22.05/ECE324 | s | >22 | |
| Fog Free time | Freezing Test | s | no fogging | |
| Mechanical | Hardness 1KG | ISO 178 | H | 1 |
| High velocity impact | ANSI Z87.1 2010 | ft/s | >300 | |
| Cross-Cut tape test | ASTM D 1000 | NA | Pass | |
| Elongation, yield % 7 | ISO 527 | % | 7 | |
| Elongation, break ISO 527 % 110 | ISO 527 | % | 110 | |
| Tensile stress, yield | ISO 527 | Mpa | 60 | |
| Tensile modulus MPa | ISO 527 | Mpa | 2300 | |
| Flexural strength, yield | ISO 178 | Mpa | 100 | |
| Flexural modulus ISO 178 MPa 2500 | ISO 178 | Mpa | 2500 | |
| Izod notched impact, 20 °C | ISO 180-1A | KJ/m² | 65 | |
| Physical | Gravity | ISO 1183 | g/cm³ | 1.2 |
| Water absorption, 24 hours | ISO 62 | % | 0.15 | |
| Thermal | Mold shrinkage | ISO527 | % | 0.5-0.7 |
| Thermal expansion | ASTM D696 | 1/ °C | 7×10-5 | |
| Vicat Softening Temp., Rate B / 120(base sheet) | ISO 306 | °C | 150 | |
| HDT, 0.45 MPa | ISO 75/Be | °C | 138 |
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