The Types segment classifies the polymer families that meet 5G performance criteria, primarily polyetheretherketone (PEEK), polyimide (PI), polysulfone (PSU), polyphenylene sulfide (PPS) and liquid crystal polymer (LCP). PEEK, contributing roughly 28 % of the material volume, is prized for its outstanding thermal‑stability above 250 °C and low dielectric constant, enabling reliable operation in high‑power RF amplifiers. Polyimide, with a 22 % share, offers exceptional moisture barrier properties and dimensional stability, making it the preferred substrate for flexible antenna arrays. Polysulfone, accounting for 20 %, balances cost and high‑temperature resistance, supporting enclosure and connector applications where mechanical strength is critical. PPS, representing 18 %, provides a unique combination of flame‑retardancy and chemical resistance, essential for outdoor base‑station housings exposed to harsh environments. LCP, at 12 %, delivers ultra‑low loss at millimetre‑wave frequencies, a decisive factor for signal‑path components such as RF filters and waveguides. By isolating these material sub‑types, the market taxonomy elucidates the differential contribution of each polymer class to the overall Special Engineering Plastics for 5G market size.
