Shanghai Daoqin Plastics Co., Ltd.

 一, plastics conductive specialized development history

炭黑95 % above used for products,炭黑 as is conductive property material, especially is 乙炔炭黑, main/primary used for dry battery in, in plastics in used as conductive property function filler is relatively new field/area . 但乙炔炭黑 production formed ring 境污染 comparison heavy, but also 乙炔炭黑 in 橡胶, plastics in processing property relatively 差, made formed product force property can relatively 差.

combined formed heavy gas 时副产 炭黑, due to its manufacturing cost high , but also it in plastics in dispersion property non 常差, make plastics products force property can loss heavy,因而不 can used as conductive material, its in plastics in use value, use amount non has 限.

油炉 method product types in also has specialized plastics use conductive 炭黑,曾列入ASTM D 1765 —96a.“橡胶 use 炭黑” standards in N472 (USA Cabot company production XC - 72), is 60 year development types use conductive 炭黑, due to it 粒径 relatively large, in plastics in dispersion property relatively good, is types good plastics use conductive 炭黑. rear, Germany Degussa company development Corax L series conductive 炭黑, Japan carbon company 也于60 year in development types use conductive 炉黑, and other and other.

炭黑 industrial research design front year development use conductive method 炭黑TD series product is reduce pellets 粒径, improve/increase ratio surface obtain relatively good conductive property, it in in use can strong/high 劲 剪切 force obtain good dispersion, made conductive property good, force property can good conductive products. will its used for plastics products 时,依然存 in force property can 差, use 效果不 good defect. this is due to TD series 炭黑不 can in plastics in obtain good dispersion 致.

炭黑 add to plastics in rear, due to filling amount and dispersion degree different, make in plastics in conductive mechanism is same. 一方面 is due to 炭黑发达 structure , make pellets between versus 互接触形 formed conductive 通道;另一方面 is due to 炭黑 pellets amount 不足, or dispersion uniform rear,炭黑 pellets between can versus 互接触, in pellets between has thin resin formed 势垒, electronics can 直接流通,但当 has electrical pressure 时, electronics can 靠隧道效应 conductive,即 electronics need in 势垒处发生 electronics 跃迁,形 formed conductive. upper, in polymer composite/compounding material conductive process in, this types conductive mechanism is meanwhile in, is conductive efficiency different already. due to conductive composite/compounding material in use conditions different,如交流, 直流, high frequency, low frequency, electrical magnetic 波屏蔽 and other and other,炭黑 in its in function has difference.

二, effect/influence conductive property can factors

1.炭黑粒径

理论 upper,炭黑 粒径越 small, mono 位体积 in pellets more, has improve/increase conductive property. this in use conductive products in is positive 常. in used for conductive plastics products 时,若炭黑 pellets small,因 plastics rear force small,故 dispersion property 差,炭黑以 a large amount of small block in material in, make conductive plastics products force property can reduce,失 实 use value. therefore need 炭黑 粒径 control in scope/range inner,才 can ensure 炭黑既 can in plastics in obtain good dispersion, also can large large increase plastics in mono 位体积 inner pellets 数, improve/increase plastics products conductive property can, meanwhile bad or less bad products has force property can.

2.炭黑 structure

DBP value large small table/sheet poly structure high low, generally 说,DBP value high 时炭黑呈链枝状 structure, conductive property relatively good. various heavy gas product DBP value non high,而 from electronics micro 镜发现 it is housing/shell micro structure,说明 its structure non very high. it high conductive property can can is due to its mono quality lower more large 结果,二 is 剪切破 bad separation one-time structure, generate a large amount of new micro 粒. need obtain in plastics in good conductive property can,炭黑必 must is relatively large, structure 不宜太 high, most good make structure formed structure. 一方面 can make in plastics in dispersion,另一方面 has 利于形 formed conductive 网络, use a small amount of 炭黑即 can to anti-static function.

3.炭黑 coarse degree

due to conductive need has coarse degree, make easy formed conductive 通道,故 requirements nitrogen surface and CTAB surface 积 差 value relatively large.

4. surface volatile content

炭黑 surface volatile content main/primary is has machine and can full understanding film formed,形 formed insulation 层, increase pellets between 势垒,严 heavy effect/influence conductive property,必 must will volatile content control in relatively low degree inner.

5. ash content and water separation

炭黑 in ash content and water separation content high,实际 upper reduce content,同样 for conductive property has effect/influence, in production in need attention/notes control in ash content and water separation content. versus ratio lower Ketjen BlackEC and 乙炔炭黑 含 carbon amount high 达9918 % left right,而 generally 炭黑则不 to 98 %. water separation content generally control in 215 % below/following,否则 will generate a large amount of bubbles, effect/influence products force property can.

三, plastics conductive specialized in PE, PVC in application

炭黑 in polymer in used as conductive material 时, due to it can different ratio/proportion filling to polymer in, make polymer composite/compounding material electrical property can can in 101 - 1014Ω·cm between selection,如 anti-static polymer electrical retardant rate in 105 - 106Ω·cm; conductive polymer electrical retardant rate in 103 - 105Ω·cm; high conductive polymer electrical retardant rate in 102 - 103Ω·cm; ultra- conductive polymer electrical retardant rate in 1 - 103Ω·cm.

and outer plastics conductive specialized product types series versus ratio,我国现 in also has Domestic plastics conductive specialized 炭黑, many plastics in need product 时, high Imported, or using/adopting use conductive 炭黑以 and use 炭黑 代替. from outer plastics conductive specialized technology indicators 看,适于 plastics product types main/primary is 一 粒径 comparison large high structure 炭黑, this in technology upper for is 一 挑战, development plastics conductive specialized is 我国炭黑 industrial 当务之急.

plastics conductive specialized in plastics industry in used for high pressure crosslinked cable semi conductive material and its it need 进行静 electrical anti 护 方. due to plastics is types high insulation property material, surface poly electrical electrical easy troubleshooting,会形 formed high 达几万伏 静 electrical high pressure, therefore used for packaging electronics device parts or electrical appliances product plastics film,需 tool has conductive property,否则 its surface electrical will make its packaging electronics product loss bad.

现 in use plastics conductive specialized conductive plastics products main/primary has 100 000 kV above high pressure cable semi conductive material. from 调查 结果看, currently used for high pressure crosslinked cable inner, outer semi conductive cable production has 60 more strip/profile (from outer 引进30 strip/profile,国 inner manufacturing 20 more strip/profile), production can force is 50 Mm/ a,约需 semi conductive material 25 kt.

实际 upper,每 strip/profile production construction start 不足,但即 make 按10 kt/ a 计, its in plastics conductive specialized filling amount generally is 30 %,则 semi conductive material in plastics conductive specialized use amount can 达3 kt/ a left right. due to Imported plastics conductive specialized price high,国 inner plastics production difficult 以承受. cable high pressure crosslinked semi conductive material has 20 %需 Imported. make is production 35 kV cable use semi conductive material, combined 格 厂家也不 more. improve/increase conductive property can, promote semi conductive material Domestic 化, can large large reduce electrical cable cost,并节约 a large amount of outer 汇.

随 我国 industrial water 平 不断 improve/increase, plastics in production and active in application 越 越 more, meanwhile, anti-static and flame retardant issues 也越 越迫切. many industry,如石油, chemical industry, textile, electronics, printing and other already for 此提出 明确 requirements, especially is use pipe/tube anti-static, flame retardant issues more 显 十 separation 突出.

in addition, also has many electronics device 材, conductive property coating material, paint, anti-static as and other need use various property can conductive 炭黑. although plastics conductive specialized main/primary is used for conductive plastics products,但 in products in has applications. use large plastics conductive specialized 炭黑, in in can production high elastic property conductive products, used for various anti-static belt/tape, sheet/plate, pipe/tube and lower use anti-static flame retardant 导风筒布 and other and other.