cannyquilter

I have the opportunity to acquire lots of plain red polycotton. I know lots of people are "purists" and only use cotton. I was thinking that I could use the poly as backing for some quilts I am making using recycled (worn and washed) clothing. The advice I want is would this work or would there be problems with shrinkage/non shrinkage when the quilt was washed. Any information as to your actual experiences would be very much appreciated.