Explanation

The measurement value of permanent deformation of rubber sample without vulcanization under the action of constant force when the external force is relieved and the sample is recovered after the specified time. plasticity refers to the size of plastic of rubber compound, and represents the processing property and flow ability of rubber compound. The instruments for measuring rubber plasticity can be divided into three types: compression type, rotation type and extrusion type. The shear rates of the three types of instruments are different. Williams'parallel plate plastometer, Rapid Plastimeter and Deval Plastimeter belong to the compression type. These plastimeters are simple in structure and easy to operate, and are suitable for factory control production. Wechsler plasticity P is often used to express the flow ability of rubber compound, quickly determine the mastication degree of crude rubber and evaluate the processing performance. The higher the Wechsler plasticity (P=O-1), the better the flow ability of rubber compound.

Classification