350 lbs per 1,000 yards
Duo Stretch nylon reinforcement was developed primarily for adhesive bound books. The material provides great strength with a stretch component that allows the material to form around the spine of adhesive bound books whose spine will be rounded. This material, however, can be used as lining for the spine of most text blocks. The product is a combination polyester/cotton warp with nylon fill. It is crimped nylon fill that gives the material its stretch characteristics.