1. AC blowing agentis an important chemical foaming agents 2. AC blowing agent usually used on plastics, rubber, foods 3. Type of AC blowing agent inluding AC1000,3000,4000,6000,7000 Partical size index of AC blowing agent AC7000 AC6000 AC4000 AC3000 AC1000 Average Partical size( Dn ), μm 3--4 4--6 6--8 8--10 10--13