配方类型:

RUBBER, RESINS, WAXES

配方说明:

use of Fluorescent Pigments in Polyethylene and Polystyrene

配方组成:

配制方法:

Like other organics, fluorescent pigments are sensitive to prolonged high temperature processing conditions. Molding temperatures in excess of 400'F are often satisfactory, but lesser temperatures are desirable since some decomposition of the pigments (with color loss) begins to take place at around 400'F. It is recommended that dwell time in the heating cylinder be kept to a minimum. If molding is interrupted for any considerable period, the cylinder should be purged to avoid discoloration of subsequent moldings. The usual precautions to avoid charring and heat decomposition should be observed in recycling scrap material. The pigments are most satisfactorily incorporated into polyethylene by means of dry blending techniques. It is desirable to use a dispersing type nozzle to improve mixing when molding the tumbled blends.
Pigment concentration may be as low as 0.5% of a molding compound.
However if maximum color, brightness and lightfastness is required, pigment contents of greater than 5% may be d