Shanghai Daoqin Plastics Co., Ltd.

         high 黏PA66 resin development

        PA66 property can excellent 良, application 广泛.

         currently, inner through polymerization can production low and in 黏PA66 resin, is in low 黏PA66直接 used for extrusion products (sheet/plate 材, pipe/tube)时, easy generate melt or phenomenon, make PA66 application scope to made.

         high 黏PA66 resin performance in separation structure upper is polymerization degree versus for relatively high, due to polymerization degree high, versus for degree large, material force property can more good, and dimensional stability and chemical resistant product property and other need ratio 普通PA66 excellent, can use various specifications Model/Grade PA棕 filament, easy deformation, easy 折弯, corrosion resistant, wear resistant loss, can use made as belt/tape, belt/tape, therefore development outlook/prospects good.

        但 high 黏PA66 relatively 普通PA66 polymerization process requirements 严格, technology content high, production cost large, currently basic Imported. is currently inner market supply 状况, substitute/replace outer type product, 推动国 inner high degree PA66 resin market development, 平顶山 Shenma engineering plastics has company 依托连续 polymerization production 线, development high 黏PA66.

        他们 is this 么做:

        依托PA66连续 polymerization production 线, through add amount salt catalytic agent SP1, adjustment polymerization process parameters, in improve/increase PA66 resin melt degree.

         specific is: in formed salt reaction device in, concentrated degree 50%, pH value 7.60～7.65 PA66 salt liquid;

        然 rear according to below/following process/workflow polymerization:

         specific process parameters 设置:

         salt liquid pH value control in 7.63～7.65, polymer material amount 1 042～1 100 kg/h, rear polymerization device true degree is 35～40 kPa, catalytic agent SP1 use amount is 60ppm.

         development PA66达 to lower indicators:

         versus for degree is 3.45～3.50,

        MFR is 18～20 g/10 min,

        黄点指数≤-4.

        该 high 黏PA66 resin product force strong/high degree high, heat stabilized property good, impact resistant, corrosion resistant, wear resistant loss, can meet/satisfy inner use use requirements, 填补 国 inner 空白.

         inner 容 源: 任永德, strong/high. high nylon 66 resin made 备[J]. engineering plastics application, 2018, 46(12):22–25.

        PA66 low temperature toughened modified

        PA66 easy wet property, low temperature resistant impact property 差.

         辽宁 large 学, cationic plastics has company using/adopting POE-g-MAH and EPDM-g-MAH两 types toughening agent modified.

         this types toughening agent 自身吸 water property very small, and its property can and PA66 极 property versus function, from reduce PA66 toughened material water absorption. material water absorption reduce, in 一定时期 inner, has maintain its excellent force property can.

         using/adopting Raw Materials lower

        POE-g-MAH: KT–916K, cationic plastics has company;

        EPDM-g-MAH: KT–8K, cationic plastics has company;

        PA66: China chemical industry has company;

        季戊四 alcohol acid ester (PETS): Italy company;

        主 antioxidant: 1010, Switzerland company;

        辅 antioxidant: 168, Switzerland company.

         Sample is this made 备

        PA66 in processing front true drying 箱于120℃ drying 4 h, rear will PA66 and toughening agent, antioxidant, lubricant 以一定 ratio/proportion mixed combined, its in antioxidant 1010, antioxidant 168, lubricant PETS, toughening agent quality separation separation is 0.2%, 0.2%, 0.3% and 0～30%. will mixed material 投放入 di screw extrusion machine in, 进行熔 melt extrusion pelletizing, di screw extrusion machine temperature degree separation is 265, 270, 275, 280, 280, 280, 275, 270, 265℃, machine temperature degree is 400℃. most rear will extrusion material drying rear, use injection molding mechanism formed standards Sample, injection molding machine temperature degree separation is 280, 270, 260℃.

         toughening agent for PA66 impact property can effect/influence lower

        当POE-g-MAH and EPDM-g-MAH quality separation is 20%时,

        23℃时 impact strong/high degree separation is pure PA66 20倍 and 19.7倍,

        –10℃时 impact strong/high degree separation is pure PA66 20.9倍 and 20.1倍,

        –20℃时 impact strong/high degree separation is pure PA66 19倍 and 18.6倍,

        –30℃时 impact strong/high degree separation is pure PA66 10.4倍 and 10.2倍,

        –40℃时 impact strong/high degree separation is pure PA66 8.1倍 and 7.8倍,

        –50℃时 impact strong/high degree separation is pure PA66 6.8倍 and 5.5倍.

        说明POE-g-MAH and EPDM-g-MAH都 can has toughened PA66, low temperature toughened very obvious, its in POE-g-MAH toughened 效果略 excellent.

         inner 容 源: 王秀秀, 郭红, 关宏宇, and other.PA66 low temperature toughened modified [J]. engineering plastics application, 2018, 46(12):26–30.

        空心 glass beads filling light amount 化PA66

         currently, for glass fiber reinforced flame retardant PA66 flame retardant add amount relatively large, made 备 材 material density relatively high, already 逐渐无 method meet/satisfy 当今各 field/area for light amount demand, therefore development light glass fiber reinforced flame retardant PA66变 越 越 important.

         in group 马鞍山矿院 new material has company using/adopting glass beads (HGS) is light function filler, HGS for glass fiber reinforced flame retardant PA66材 material material force property can, density, resistant thermal properties and flame retardant property can effect/influence.

         using/adopting HGS flow property, chemical and heat stabilized property good, resistant pressure strong/high degree high, wear resistant, can full meet/satisfy composite/compounding material processing process in requirements.

         using/adopting Raw Materials lower

        PA66: EPR27, versus for degree 2.7, China Shenma group;

         glass fiber: 988A, Monofilament 直径9～13 µm, 浙江巨石 group;

        HGS: true density 0.60～0.65 g/cm3, resistant pressure strong/high degree ≥85 MPa, average particle size D50 is 20 µm, in group 马鞍山矿院 new material has company;

        BPS: USA large company;

        Sb2O3: 星贝达(Shanghai) chemical industry material has company;

         silicon coupling agent: KH550, chemical pure, chemical has company;

         antioxidant, lubricant, processing additives, alcohol and other is 市售.

         Sample is this made 备

        先 will PA66, antioxidant, lubricant, processing additives, BPS and Sb2O3 in high speed mixed combined machine in uniform, rear from di screw extrusion machine material add 入, HGS(先经 KH550 surface modified 处理) from di screw extrusion machine material add 入, glass fiber (GF) di screw extrusion machine glass fiber (GF) add 入, adjustment good machine speed and material ratio/proportion, make glass fiber (GF) content control in 30%, HGS content is design value, rear cooling, pelletizing, made PA66/GF30/HGS reinforcement flame retardant material. its in di screw extrusion machine processing temperature degree is 250～280℃, screw speed control in 280 ～330 r/min. will extrusion material in 100℃恒 temperature drying in drying 4 h, rear in injection molding machine upper injection formed standards strip/profile, injection molding pressure 60～90 MPa, injection temperature degree 设置265～275℃. will made 备 样 strip/profile in temperature degree is (23±2)℃, wet degree is (50±5)% ring in adjustment 48 h rear property can testing.

        HGS for reinforcement flame retardant PA66 property can effect/influence lower

         using/adopting HGS filling glass fiber reinforced flame retardant PA66, can achieve decrease heavy 目, meanwhile improvement material water property, dimensional stability and heat resistant property. using/adopting average particle size 20 µm HGS粒径越 small, 当HGS content in 5%～10%时, PA66/GF30/HGS comprehensive property can relatively good.

         inner 容 源: 吴喜元, 汪俊, 陈锐.空心 glass beads in glass fiber reinforced flame retardant PA66 in application [J]. engineering plastics application, 2018, 46(12):48–52.