PPR(pentatricopeptide repeats)， Also known as random copolymer polypropylene (PPR), its product has good toughness, high strength, excellent processing performance, good creep resistance at high temperatures, and has the unique high transparency advantage of random copolymer polypropylene. It can be widely used in the production of pipes, sheets, daily necessities, packaging materials, household electrical components, and various films.

PP-R, also known as Type III polypropylene pipe or random copolymer polypropylene, is made by extruding random copolymer polypropylene into pipes and injecting them into fittings. Polypropylene random copolymer is also a type of polypropylene, and the basic structure of its polymer chains is modified by adding different types of monomers. Ethylene is the most commonly used monomer, which causes changes in the physical properties of polypropylene. Compared with PP homopolymers, random copolymers have improved optical properties (increased transparency and reduced haze), enhanced impact resistance, increased flexibility, reduced melting temperature, and thus lowered the heat fusion temperature; At the same time, it is basically the same as homopolymers in terms of chemical stability, water vapor isolation performance, and organ sensory performance (low odor and taste). Used in the fields of blow molding, injection molding, film and sheet extrusion processing, as food packaging materials, pharmaceutical packaging materials, and daily consumer goods.