Shanghai Daoqin Plastics Co., Ltd.

        传统 plastics more is hot plastics or thermal conductivity non low material. 1998 year Coolpolymer首先 will tool has thermal properties thermally conductive plastics achieve 商业化. will its widely used in lighting, automotive, electronics power/electricity, medical grade equipment and other. 近二十 year, thermally conductive plastics to development. that thermally conductive plastics is how 样? it thermally conductive mechanism also is what?就 let small belt/tape large 家一起 understanding lower.

        一, what is thermally conductive plastics

         thermally conductive plastics is utilizing thermally conductive filler (包括 pellets, fiber, sheet/slice and other) for polymer/macromolecule 基体材 material uniform filling, improve/increase its thermal properties. thermal properties good bad main/primary use thermal conductivity (mono 位: W/(m.k)) amount.

        二, commonly used 基体材 material and filler

         thermally conductive plastics main/primary formed separation 包括基体材 material and filler. 基体材 material 包括PPS, PA6, PA66, PA12, PA46, LCP, TPE, PC, PP, PPA, PEEK and other, Common plastics thermal conductivity lower table/sheet:

table/sheet Common plastics thermal conductivity

filler below/following metal and machine filler:

        (1) metal powder filler: copper powder, aluminum powder, iron powder, powder, powder and other;

        (2) metal oxidation material: oxidation aluminum, oxidation 铋, oxidation 铍, oxidation 镁, oxidation zinc;

        (3) metal nitrogen material: nitrogen aluminum, nitrogen 化硼, nitrogen silicon;

        (4)无 machine non metal: 石墨, carbon silicon, carbon fiber, carbon nano tube/pipe, 石墨烯, carbon and other

         Common thermally conductive filler thermal conductivity lower table/sheet:

table/sheet Common thermally conductive filler thermal conductivity

三, thermally conductive plastics classification

         thermally conductive plastics can separation is: thermally conductive conductive plastics and thermally conductive insulation plastics . large more thermally conductive plastics electrical insulation property can, most is filler pellets insulation property can 决定.

        1, insulation thermally conductive plastics

         insulation thermally conductive plastics in main/primary formed separation 包括: plastics + filler + other, its in filler 包括:

         metal oxidation material Al2O3, MgO, SiO2;

         metal nitrogen material AlN, Si3N4, BN and SiC, B4C3 and other;

         due to filler pellets belongs to non conductive pellets, from 而导致 plastics insulation. this type thermally conductive plastics thermal conductivity high, generally is 1.5W/m.k left right.

        2, conductive thermally conductive plastics

         conductive thermally conductive plastics main/primary formed separation 包括: plastics + filler + other, its in filler 包括: metal powder, fiber, 石墨, carbon fiber, CNT, 石墨烯 and other , due to this type filler belongs to conductive pellets, therefore its for thermally conductive plastics is conductive. this type thermally conductive plastics thermal conductivity relatively high, generally can to 5.0W/(m.k) above.

        四, thermally conductive plastics thermally conductive mechanism

         thermally conductive plastics thermal properties 取决于 polymer and thermally conductive filler versus function. different types type filler tool has different thermally conductive mechanism.

        1, metal filler thermally conductive mechanism

         metal filler thermally conductive main/primary is 靠 electronics 运动进行 thermally conductive, electronics process hot amount 传递.

        2., non metal filler thermally conductive mechanism

         non metal filler thermally conductive main/primary 依靠声子 thermally conductive, its hot can expand dispersion speed rate main/primary 取决于邻近原子 or combined 基团 振动. metal oxidation material, metal nitrogen material and carbon material.

        五, effect/influence thermally conductive plastics thermal conductivity factors

        1, polymer 基体材 material types type and features

        基体材 material thermal conductivity ultra-high, filler in dispersion property good and and filler combined degree good, thermally conductive composite/compounding material thermal properties good.

        2, filler types type

         filler thermal conductivity high, thermally conductive composite/compounding material thermal properties good.

        3, filler 形状

         generally 说, easy formed thermally conductive 通路 次序 is must > fiber 状 > sheet/slice 状 > pellets 状, filler easy formed thermally conductive 通路, thermal properties good.

        4, filler content

         filler in polymer/macromolecule distribution 情况决定 composite/compounding material thermal properties. filler content relatively small 时, to thermally conductive 效果不 obvious;当 filler more 时, composite/compounding material force property can to relatively large effect/influence. filler content increase certain value 时, filler between versus function in system in formed similar or 者链状 thermally conductive 网链, thermally conductive direction and hot direction 一致时, thermal properties most good. therefore, thermally conductive filler amount in certain 一临界 value.

        5, filler and 基体材 material interface combined features

         filler and 基体 结 combined degree high, thermal properties good, selection combined coupling agent for filler surface treatment, thermal conductivity can improve/increase 10%—20%.

         thermally conductive plastics as is types full new material, tool has plastics excellent molding processing conditions, meanwhile thermally conductive metal tool has more low density, more low cost, can substitute/replace metal used for multiple application combined lower dispersion hot parts, leading dispersion hot parts toward more light amount 化, more environmental protection 迈进.