The use of regrind generated by runner systems
or ground up defective parts must be limited to the maximum suggested by the
material manufacturer. Typically 20% to 25% regrind is allowable without detrimental
effect on physical properties of the raw material. Maximum regrind for many
materials are published in the material specification sheets provided by GEPolymerland
material guide. Many considerations and testing should be used in determining
the amount or if regrind can be used. Some effects of too much regrind will
be the loss of physical properties and discoloration.