The so-called blister refers to the transparent front of the glass bulb. Incandescent lamps, all made from glass, shell, but in a Light Bulb, although can also be made of glass in front of the shell, actually do so. Heavy, but because of the LED bulb weight and five times more th an incandescent light weight, if made of glass, fall to the ground, smashes the possibility of much. Therefore more LED bulb is made of plastic foam shell, to prevent broken. LED bulb heat of the infrared heat from the radiator are scattered out, so the by Everbright blister are visible, very few, so the plastic to do the blister will not be damaged due to overheating.
But the biggest problem of the plastic shell is the transmittance. LED glare problems, so as far as possible the milky foam shell, so as not to see the inside of the LED lamp. Milky white blister. Their transmission rate is even more problematic. LED bulb lamp shell plastic the following requirements:
A high transmittance, high diffusion, no glare, no light and shade;
2 concealed light source is better (as far as possible do not see the LED lamp);
(3) the transmission rate of 90%;
(4) with high flame resistance;
With high impact strength;
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