EPDM foam strips formed by chemical foaming have disadvantages such as coarse and uneven foam pores, and insufficient mechanical properties. Expandable microspheres can help solve these problems. Microspheres can also be used as foaming agents in dense rubber strips to achieve:

Micro foaming of dense rubber strip

Reduce product density

Uniform and dense pores, invisible to the naked eye

Helps with lightweighting

Improve sound and heat insulation performance