Shanghai Daoqin Plastics Co., Ltd.

        PA6 chemical material features and PA66 very versus 似, however, it melting point relatively low, but also process temperature degree scope/range very wide. it impact resistant property and resistant solvent understanding property ratio PA66 need good,但吸 wet property more strong/high. 因 is parts many quality features need to wet property effect/influence, therefore use PA6 design product need separation to this 一点. is improve/increase PA6 machine features, add various modifier. 玻璃就 is most Common additives, has is high impact resistance property also add combined formed 橡胶, 如EPDM and SBR and other.

         using/adopting PA6材 material, can to semi transparent 效果, resistant temperature 不理想, using/adopting PA66, 则达不 to semi transparent 效果, PA66 ratio PA6 resistant thermal properties need good, PA66 rigid property good, PA6 tough property good, nylon 66 price ratio nylon 6 贵, relatively nylon 6 soft/flexible , can ultra- fine fiber, high clothing/apparel material, in market upper quality good 羽绒面 material use nylon 66, slip 腻, light thin soft/flexible, has anti 羽效果. color relatively difficult, easy upper color, need high temperature color, color degree is very good.

         nylon 66 and nylon 6 同 polyamide (PA) fiber, nylon 66 is adipic acid hexamethylenediamine polycondensation formed; nylon 6 则 is caprolactam polycondensation formed. from separation structure upper 看, this types fiber is non versus 似, therefore material and chemical property can basic 近似. different is nylon 66 versus separation hydrogen combined more add solid, therefore it melting point high 达260℃, ratio nylon 6 need high 出40℃ left right, resistant thermal properties comparison excellent 越. 两者 织造 and property can also 不错, nylon 66 melting point relatively high, resistant thermal properties relatively good, elastic property modulus more good, more combined manufacturing heat resistant product, 如轮胎帘子线 and heat resistant water 洗涤织 material and material. this is from fine micro difference, upper in clothing/apparel use textile product upper is large, main/primary applications in industrial application upper, especially is in 帘子线 applications upper, nylon 66 more add excellent 秀. PA6 is types tough degree comparison good, commonly used in 攀手, automotive structural parts and other. PA66 is types has tough degree also has hardness, used for industrial gears upper use 螺旋桨 and other.

        PA6

         for/regarding has additives product, PA6 shrinkage rate in 1% to 1.5% between. add glass fiber additives can make shrinkage rate reduce to 0.3%(但 and process/workflow versus direction also need high 一). molding shrinkage rate main/primary material crystallization degree and wet property effect/influence.

         injection molding process conditions

         drying 处理: due to PA6 very easy absorption water separation, therefore processing front drying especially need attention/notes. if material is use anti water material packaging supply, container maintain 密闭. if wet degree large 于0.2%, in 80C above hot gas in drying 16 small 时. if material already in gas in ultra- 8 small 时, 建议进行105C, 8 small above true dry.

        熔化 temperature degree: 230~280C, for/regarding reinforcement product types is 250~280C.

         mold temperature degree: 80~90C. mold temperature degree very significantly effect/influence crystallization degree, crystallization degree also effect/influence parts machine features. for/regarding structure parts crystallization degree very important, therefore mold temperature degree is 80~90C. for/regarding thin 壁, process/workflow relatively long parts 也建议施 use relatively high mold temperature degree. increase large mold temperature degree can improve/increase parts strong/high degree and rigid degree, reduce tough property. if thick large 于3mm, use 20~40C low temperature mold. for/regarding reinforcement material mold temperature degree large 于80C. injection pressure: generally in 750~1250bar between (取决于材 material and product design).

         injection speed degree: high speed (for reinforcement type material need micro reduce).

         runner and gate: due to PA6 凝 solid time very short, therefore gate non important. gate 孔径不 need small 于0.5*t(this 里t is parts thick degree). if use hot runner, gate dimensions ratio use runner small 一, is hot runner can 够帮助 retardant material solid. if use 潜入式 gate, gate most small 直径应当 is 0.75mm.

        PA66

        PA66 in polyamide (PA) material in has relatively high melting point. it is types semi 晶体-晶体材 material. PA66 in relatively high temperature degree can maintain relatively strong/high strong/high degree and rigid degree. PA66 in molding rear still tool has wet property, its degree main/primary 取决于材 material formed, thick and ring conditions. in product design 时, need 考虑吸 wet property for stability property effect/influence.

         is improve/increase PA66 machine features, add various modifier. 玻璃就 is most Common additives, has is high impact resistance property also add combined formed 橡胶, 如EPDM and SBR and other.

        PA66 viscous property relatively low, therefore flow property very good (但不如PA6). this property can use processing very thin parts.

         it viscosity for temperature degree very 敏感. PA66 shrinkage rate in 1%~2% between, add glass fiber additives can will shrinkage rate reduce to 0.2%~1%. shrinkage rate in process/workflow direction and and process/workflow direction versus direction upper versus is relatively large. PA66 for many solvent agent tool has resistant solvent property, for acid and its it chlorine agent resistant force relatively low.

         injection molding process conditions

         drying 处理: if processing front material is 密封, that 么就没 has necessary drying. however, if container by 打开, that 么建议 in 85C hot gas in drying 处理. if wet degree large 于0.2%, also need 进行105C, 12 small true drying.

        熔化 temperature degree: 260~290C. for additives product is 275~280C. temperature degree 应避免 high 于300C.

         mold temperature degree: 建议80C. mold temperature degree will effect/influence crystallization degree, crystallization degree will effect/influence product material features. for/regarding thin parts, if use low 于40C mold temperature degree, parts crystallization degree will time 而变化, is maintain parts stability property, need 进行退火处理.

         injection pressure: usually in 750~1250bar, 取决于材 material and product design.

         injection speed degree: high speed (for/regarding reinforcement type material low 一).

         runner and gate: due to PA66 凝 solid time very short, therefore gate non important. gate 孔径不 need small 于0.5*t(this 里t is parts thick degree). if use hot runner, gate dimensions ratio use runner small 一, is hot runner can 够帮助 retardant material solid. if use 潜入式 gate, gate most small 直径应当 is 0.75mm.