Introduction
Naphthen group processing oil has naphthen group of 40 ~50% which is refined through special process and is composed of high molecular property, it is good to processing working under high temperature and has less evaporation damage and gives an equilbrium characteristic to rubber items like processing property, low temperature stabilization, heating property, elasticity, tensile strength and hardness etc. So it is proper to the processes of natural rubber such as electric wire rubber, tube and packing etc, SBR and CR.