THREETEX OPTICAL BRIGHTENER
JMB is pleased to offer Threetex optical brightener (CI Optical Brightener 184)
to the UK plastics industry for use in a wide variety of materials including
polyolefins, polystyrenes and PVC.
These plastics can often appear pale orange-yellow in sunlight because of
absorption of the blue-violet wavelength radiation by impurities and relatively
strong reflection of the orange-yellow range. When a small amount of optical
brightener is used, the incident UV radiation is absorbed and re-emitted in the
visible blue-violet range, counteracting the yellowish tinge.
Suggested loadings
Lightfastness
The light fastness of Threetex depends on the resin system in which it is used
and the loading. On a scale of 1 - 8 (8 being highest), Threetex in HD
polyethylene would be rated 2 - 4, in PVC 4 - 7 and in polypropylene 1 - 4.
Physical form
The material is supplied in the form of a fine yellow powder with mean particle
size around 20 µm.
Please contact us if you would like further information or a sample of this
product.
Page last updated 25/7/11
