Synthetic polymer phase change material, one type is comb polymer that was synthesised by maleic anhydride with stearyl alcohol, polyethylene glycol or polytetramethylene ether glycol and then polymerized by peroxide catalyst; the other is net polymer that was synthesised by maleic anhydride or succinic anhydride with polyethylene glycol or polytetramethylene ether glycol. Mixing with Net-poly (PTMEG2000-Maleic anhydride) and nylon powder, chips were produced with a twin Screw Extruder and then the nylon fibers containing polymeric phase change material were produced with spinning machine at 240 ∼ 250℃ . These polymer phase change materials can be applied of textiles, such as membranes, or fibers.