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A head injury is any trauma that leads to injury of the scalp, skull, or brain. The injuries can range from a minor bump on the skull to serious brain injury.
Head injury is classified as either closed or open (penetrating).
Every year, millions of people have a head injury. Most of these injuries are minor because the skull provides the brain with considerable protection.
The symptoms of minor head injuries usually go away on their own. More than half a million head injuries a year, however, are severe enough to require hospitalization.
Front Birm Or Full Brim
We carry both front brim and full brim hard hats. Both hats allow protection from rain, snow, sunlight and falling objects.
- Helmet is configured to glow-in-the-dark after being exposed to light
- Allows others to visually locate a wearer in a dark environment without a light source
- Well suited for around the clock use
- Excellent for night construction workers, miners and others in a dark environment
- Illumination visible for over 48 hours
- Both hats comply with ANSI Z89.1, 2003, Type 1 Class C, E & G Standards.
Q & A
Q: What causes the hat to glow?
A: The glow is caused by photoluminescence, commonly referred to as Glow-in-the-Dark. The materials used in our hard hats are nothing at all like the glow-in-the-dark materials of several years ago. They charge quickly and glow much brighter and much longer than the glow-in-the-dark items you may remember having as a child.
Q: How long does it take to charge?
A: Charging for 10 to 20 minutes in sunlight would be excellent to produce a stong lasting glow. Thirty minutes in bright fluorescent light will provide enough UV exposure to produce a bright glow. Even 20 minutes near a 40W incandescent bulb will generate significant glow.
Q: How brightly does the hat glow?
A: In intermediate levels of lighting, our hard hats take on a greenish color as the glow competes with the light from its surroundings. In dark conditions, our hard hat's glow has been measured at 1220 mcd/m2 immediately after charging and, after ten minutes, was still 45 times as bright as required by ASTM 2073 for emergency signage.
Q: How long can the glow be seen?
A: To eyes accustomed to the dark, the glow can be seen for several days. The following table shows the brightness measured in one test at various intervals after a charge:
| Time In Dark | Luminance (mcd/m²) |
|---|---|
| 10 minutes | 908 |
| 30 minutes | 342 |
| 1 Hour | 189 |
| 2 Hours | 119 |
| 4 Hours | 67 |
| 8 Hours | 32 |
| 16 Hours | 18 |
| 24 Hours | 13 |
Note: The average human eye can see a glow down to about 0.0032 mcd/m2. (Some standards measure afterglow time as the time to fade 100 times that level or 0.30 mcd/m2.)
Q: How does the after-glow of the hat fade?
A: The fading begins as soon as the source of charging is removed - faster at first then slowing over a long period of time. For a number of hours, this fading is partially offset by a dramatic increase in the sensitivity of the eye to see light.
Q: What is the useful life of the product?
A: The hat has a normal life span of a molded polyethylene safety helmet. The photoluminescent properties, however, should last almost indefinitely.
Q: What is the difference between fluorescence and photoluminescence?
A: Both absorb light, especially ultraviolet, and then emit light at a different (usually longer) wavelength. Fluorescence is immediate and only visible during external illumination. Photoluminesscence is similar but the light emitted from the material is delayed so it is still visible after the illumination is removed.
Q: What are the blemishes that sometimes occur on the helmets?
A: These helmets are produced without the coloring pigments typically used in safety helmets. These pigments hide many minor blemishes but would drastically reduce the hats photoluminescent properties. The blemishes are naturally produced by the manufacturing process and are purely cosmetic in nature. They do not in any way reduce the effectiveness of the hat.
Q: Does the hat meet OSHA requirements?
A: The hats are in full complies with the ANSI Z89.1-2003 Standard for a Type 1 (crown impact), Class E, G and C safety helmet.
Q: Can these hats be imprinted or otherwise customized.
A: These hats can be imprinted. In this case, the logo or image will bee seen as dark against the glowing helmet. Also, flourescent and/or retroreflective adhesive strips can be added for daytime or illuminated nighttime conspicuity. Other decorations and attachments may be added provided that any adhesives that are used are compatible with the high density polyethylene shell.
