11 сентября, 2015 
Malyar Only initiators sensitive to long-wave UV light over 325 nm are used in UV aerobic acrylic adhesives. Long-wavelength UV light is sometimes referred to as ‘‘black light’’ and is generally considered harmless. Short-wavelength radiation, on the other hand, can produce burns. (Sunburn from overexposure is a familiar example.) The high-intensity lamps listed in Table 6 all require shielding to protect workers from the short wavelengths that they emit in addition to long-wave UV light.
Special long-wave light generators are available for curing aerobic adhesives utilizing fiber optics that will transmit UV light, and small ‘‘penlight’’ lamps have become available, too. These light sources are ideal for hand assembly of small parts such as electronic components. These light sources are illustrated in Fig. 9.
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Figure 9 Long-wave light generators. |
Table 7 Bonding Categories Using UV Aerobic Acrylic Adhesives
Bonding Light welding Potting/coating (other)
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Chip bonding Speaker software assembly Wire tacking Temporary bonding Ferrite magnet assembly Electrical leads to lamp housing Sealing motor parts Tamper proofing of mechanical fasteners Cotume jewelry |
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