Shanghai Daoqin Plastics Co., Ltd.

          modified plastics in 5G时代 can used for equipment outer frame, 键盘, rear cover/cap, in frame, and other parts, tool has outer housing/shell 包覆, decoration, and and other function. Common modified plastics resin 如图1 示.

图1 modified plastics use polymer/macromolecule resin

         electrical in generally is electrical retardant rate ultra- 1010·cm, in electrical in 以感应而并 non methods its electrical property can material is electrical 介质, 通俗称之 is insulation material. large more polymer/macromolecule resin is carbon, hydrogen, oxygen, nitrogen, is through 共价键 according to 特定 序列 and 立体构 type 连接起 large molecular weight combined formed material, separation in has can 移动 自由 electronics, make in outer add electrical pressure lower, can formed electronics toward 移动, meanwhile, large more polymer/macromolecule resin has for electrical magnetic absorption, metal or separation structure;而 polymer/macromolecule resin is modified plastics most important, ratio/proportion most high 基材, therefore 我们默认绝 large more modified plastics is insulation property material.

         modified plastics insulation property generally through volume resistivity , dielectric constant and dielectric loss, dielectric breakdown voltage 三项 table/sheet 示.

         volume resistivity , is material mono 位体积 for electrical retardant resistant, use table/sheet material electrical property 质. usually volume resistivity high, material use electrical insulation parts can high. usually electrical retardant rate is volume resistivity.

        式 in, h is Sample thick degree (即两极 between 距离);S is electrical 极 面积, ρv mono is Ω·m(欧姆·米). polymer/macromolecule material volume resistivity generally in 108-1018Ω·m.

         dielectric constant (dielectric constant) is table/sheet electrical most basic amount. table/sheet material 极化并储存 electrical can force material amount is dielectric constant, use ε table/sheet 示, amount 纲.

        式 in: Cx — electrical container sheet/plate 充满介质时 electrical 容;C— electrical container sheet/plate is true electrical 容;ε— electrical amount increase 倍数, versus for dielectric constant. dielectric constant large small table/sheet 示该介质 in electrical versus function decrease low degree. as is high frequency insulation material, ε need small, especially is used for high pressure insulation 时.

         dielectric loss (tgδ): electrical 介质材 material in outer electrical function lower hot loss consumption that separation can amount. loss consumption usually is 指交流 loss consumption. will electrical in electrical function lower, mono time consumption electrical can 叫介质 loss consumption. engineering in, will dielectric loss use loss consumption positive 切tgδ table/sheet 示. tgδ is insulation 体 无效消 consumption can amount for has 效输入 ratio/proportion, it table/sheet material in cycle inner hot rate loss consumption and 贮存之 ratio, is amount material loss consumption degree material amount

        式 in: ω — electrical frequency rate;R —并联 and other 效交流 electrical retardant;C —并联 and other 效交流 electrical container

        介质 loss consumption for/regarding use in high pressure plant/unit, high frequency equipment, especially is use in high pressure, high frequency and other 方 材 material and device parts tool has especially important 意义, loss consumption large, not only reduce machine property can, 甚至会造 formed insulation material hot 击穿.

         dielectric breakdown voltage and electrical strong/high degree : is table/sheet certain types material insulation property can most important parameters. electrical strong/high degree is electrical strong/high degree. 两者 关系 is:

        击穿 electrical strong/high degree

        E=V/h

        式 in: V— dielectric breakdown voltage;h —材 material thick degree; mono is kv/mm.

         table/sheet 1 to 出 部 separation polymer/macromolecule resin electrical property can type value.

table/sheet 1 部 separation polymer/macromolecule resin electrical property can type value

         dielectric constant ε and material separation 子 极化 can force related. polymer/macromolecule resin ε由主链 structure in features and 排列 决定. non property material can force small, ε and tg都 relatively small, 例如HDPE, PP, PS and PTFE ε均 in 3 below/following;极 property material separation structure in has property relatively strong/high ester 键, amine 键, and other, separation in electrical in can force relatively strong/high, ε and tg越 large, it dielectric constant in 3-5 between;极 property 取代基团 effect/influence more large, its 数目越 more, ε and tg越 large, 例如离子 polymer, acid salt, acid copolymer and other.

        典 type modified plastics is polymer/macromolecule resin is 基材, add fiber, additives and filling agent high temperature extrusion pelletizing process made formed separation complex composite/compounding material, dielectric constant ε effect/influence factors more more, not only and polymer/macromolecule resin dielectric constant has 关, and its in add fiber, additives and pelletizing process in it 们彼此发生 material chemical reaction process formed micro structure related.

        材 material industry 也迎 5G new 时代, in application machine, 基站, material 联网, automotive and other hard parts 载体都 will for 5G new material has more more demand and more high requirements. long lower 方二维码 add 入艾邦5G材 material 交流群进行交流, development 进步!