| 摘要 |
A reservoir assembly 40 comprises a container 4, a support assembly 42 on which the container 4 is mounted and fixed and a rotary electric vibrator device 44 coupled to the support assembly 42. The container holds a shear thinning additive for a plastics material. The reservoir assembly is arranged so that on operation of the device 44, an appropriate frequency and amplitude of vibration is applied to the container 4 and, therefore, its contents. As a result, a liquid dispersion in the container 4 is shear thinned and recovery of dispersion from the container 4 is increased. The additive preferably comprises a vehicle and an active component which it is desired to introduce into the plastics material. The active component may be, for example, UV filters, oxygen absorbers, antimicrobial agents, acetaldehyde scavengers, reheat additives, anti-oxidants, light stabilizers, optical brighteners or flame retardants. |
