Rule <R24> governing custom plastics states: Legal plastic types are polycarbonate (Lexan), acetal monopolymer (Delrin), acetal copolymer (Acetron GP), POM (acetal), ABS, PEEK, PET, HDPE, LDPE, nylon (all grades), polypropylene, PTFE, and FEP.
Certain manufacturing styles, such as SRPP (Self-Reinforced Polypropylene) or SR-PET, use a woven structure of a specific polymer embedded within a solid base of that exact same polymer to increase strength. These materials do not contain any glass, carbon, or other foreign additives. They are made physically and chemically of 100% pure polymer. If a material is made entirely of a single plastic explicitly listed in <R24>, but utilizes this internal self-reinforced woven structure, is it considered legal provided it meets all other rule requirements (such as being non-shattering, staying within the maximum 0.070" thickness, and adhering to the individual piece limits)?