Paub Txog PA66GF25 Granules: Kev Siv Thiab Thaj Chaw Tseem Ceeb

Kev Sib Pab Los ntawm PA66GF25 Granules: Kev Siv Thiab Thaj Chaw Txheej Xwm

PA66GF25 granules feem ntau tsim los ntawm polyamide 66 (PA66) thiab sib npav nrog lub fiber phiaj tshuab nyob ze 25%, tsim tau yam uas peb hu ua chaw daim material pib. Yog li cas uas txhais tau tias no muaj zog yog li PA66 qhov chaw tsim muaj kev tuag zoo rau khoom siv kim thiab hloov mus rau thermoplastic. Tom qab ntawv, cov phiaj tshuab uas khaum nruj hauv chaw tsim muaj feem ntau ua rau nws tsis hlawv thiab zoo dua nyob rau kev rov qab los ntawm kev siv. Thaum xij rau kev siv rau thermal break, cov khoom no tsis hlawv li cov khoom siv plastic tsis muaj phiaj tshuab. Kev test los ntawm xyoo no tau qhia qhov no nyuaj, uas yog qhov uas piav qhia vim li cas ntau tus neeg tsim khoom tau hloov mus siv nws rau cov khoom tseem ceeb uas qhov loj me zaws yog qhov tseem ceeb.

Caij ntev ntawm 25% Phiaj Tus neeg pab cuam fiber rau kev pab hloov kho nyob rau kev siv

Qhov muaj 25% sib thooj roj ua pheej nyav tshuab ntau dua, tso cai rau kev cuam tshuam zoo dua, tso cai rau kev txhim kho siab npaum li 40–60% dhau qhov PA66 tas. Cov duab ntawm sib thooj roj uas tau sib xyaw zoo tuaj yeem pab tshem tawm kev puas tsuaj thaum muaj kev cuam tshuam, uas yog qhov tseem ceeb rau cov duab ntawm aluminum uas tshua hnov qab kev cuam tshuam los ntawm dej thiab kub xwv.

Kev Nyob Tsis Tu Zoo Thiab Qhov Txawv Ntawm Kev Thim Khom Nyob Rau Hauv Qhov Keem Qhov Chaw

PA66GF25 nyob ib feem tsis tu ncua hauv qhov chaw kho tshuab txog 240°C, tab sis qhov kev nyob khom ntawm nws yuav tsum muaj kev saib xyuas meej. Even 0.2% moisture can reduce melt viscosity by 15%, risking voids in extruded profiles. Pre-drying to 0.05% moisture is critical to maintain fiber-matrix adhesion during extrusion.

Qhov Kawg Loj ntawm PA66GF25 Rau Hauv Qhov Kev Pab Cuam Tshuam Thiab Kev Nyob Tsiv Tseg Hauv Cov Duab Ntawm Aluminum

Qhov Kev Pab Cuam Tshuam Thiab Kev Nyob Tsiv Tseg Hauv Cov Duab Ntawm Aluminum

PA66GF25 siv nyob rau hauv kev lag luam ntawm qhov chaw sov hlwb tso cua sov txias ib feem ntau, nyog li 40% tsawg dua li cov polymer tshaib uas tsis muaj lej khaum. Tus material no tsis dhau dej ntau, nyob saum 1% xeeb heev thaum dej ruaj khov txog li 50%. Qhov no pab tswj xyuas qhov ntev thiab qhov loj ntawm chaw nyob zoo ib yam ib txhis, tsis hais neeg ntsej muag nyob rau hauv -30 degrees Celsius lossis nyob rau 120 degrees. Tsis muaj qhov kho tawv, yog li tsis muaj qhov tawb tshwm sim thaum sijhawm. Thiab peb paub tag nrho tias qhov tawb no ua rau peb nyuaj siab npaum li cas, vim tias lawv nyob ze 15 mus rau 20% ntawm kev siv zog los ntawm cov chaw nyob uas tsis zoo. Yog li cov chaw nyob tuaj yeem tso cua sov txias ntev dua, qhov no yog daim ntawv txaus siab rau kev nyob zoo thiab kev siv zog.

Zog siab thiab kev nyob dav ntxos thaum muaj zog

Zib ntsuab kub los ntawm PA66GF25 tuaj yeem tiv thaiv ntau dua li 35 MPa tsis muaj teeb meem hla siab, thiab cov khoom no zoo dua PA66 tshiab txog 60% nyob rau hauv kev tiv thaiv kev puas tsuaj thaum sijhawm. Kev test uas sim qhov kev puas tsuaj ntau dua li ntau xyoos tau pom tias cov zib no tsis loss dua li 95% ntawm qhov chaw ntxig taw tes, uas ua rau lawv zoo tshaj rau kev siv rau cov rooj tog raj tog twj nruj. Cov leeg uas muaj kev tiv thaiv UV kuj nyob ntev dua li 25 xyoo, tiv thaiv kev puas tsuaj los ntawm dej muaj yaj nyob ze vaj tse thiab kev phom sij uas yog ib qho teeb meem rau cov khoom siv nyob rau hauv kev tsim kho.

Txhim kho kev tsim los ntawm PA66GF25 Granules

Kev raug zoo ntawm kev tsim thiab cov polymer muaj duab

Kev tsim PA66GF25 xav tau cov screw tsim nyog rau kev tsave cov duab. Cov screw muaj dab tsi muaj ib qho 28:1 txoj ceev kom tsawg dua kev puag ncig ntawm lub roj cy fiber los ntawm 22% hn compared to standard configurations, nyob ib txhiab nrog qhov tshuab hluav taws xob siab npaum li 160 MPa. Saut tej saut sov ntawm 280–300°C yooj yim rau kev sib xyaw thiab kev sib xyaw ntawm fiber-matrix, uas yog qhov tseem ceeb rau cov thermal break profiles.

Kev daws Melt Flow Rate (MFR) rau kev tsim cov profile tshwm sim

Nyob ib txhiab nrog MFR hauv 15–25 g/10 min (ISO 1133) thiaj pab tau rau kev tsim cov profile tshwm sim tib yam. Qhov kawg ntawm saut tej saut sov barrel tsuas yog ±3°C tuaj yeem hloov qhov viscosity los ntawm 18%, uas txhob tau sau npe nyob ze. Cov barrel muaj ob qhov tawm hloov tau nyob ib txhiab rau 0.02%, kho tau qhov chaw nruab nrab los ntawm 34% hauv cov extrusions ntev.

Kev tiv thaiv kev nqaij nqus thiab kev faib cov ntaub ntawv hauv qab kev tsim cov profile

Yog tias xav tau kev sib txawv ntawm daim duab (80–90%) thiab tsis txhob surpass 450 kPa shear stress. Cov mixer sib parallel-laned pab ntxiv homogeneity los ntawm 29% dhau cov single-flight screws, zoo li mu-CT imaging sau ua ke ntawm cov duab 8 mm thick. Shear rates nyeej 800 s⁻¹ tiv thaiv polymer degradation thaum muab fibers rov qib raws nraim ntawm extrusion direction rau kev ntxiv zog.

Sib piv ntau glass content nrog cov teeb meem hlo li khaws

Cov 25% glass fiber ntxiv stiffness los ntawm 40% tab sis ntxiv extrusion pressure mus rau 85–100 bar. Sau 0.3–0.5% silicone-based process aids txo pressure los ntawm 18%. Post-die calibrators muaj ±0.1 mm precision khiav ib txhis ntsiab lus sib npaug dua 500+ production cycles.

Kev duab ntawm PA66GF25 Granules thiab Kev Tswj Xyuas Qhov Txiaj

Kev test kho tshiab rau Rheological thiab Mechanical Properties

Txhawj xeeb tias yam ntxwv zoo yuav tsum tau txais kev test tsau rau txhua chav. Qhov chaw muag khoom yuav tsum verify MFR stability hauv ±2 g/10 min (ISO 1133) thiab qhov tshwm sim ntawm tensile strength yog 180 MPa (ASTM D638). Cov uas siv kev sau ntaub ntawv nyob rau hauv kev ua haujlwm rau cov khoom siv hloov kho, feem ntau li 63% tshaj li kev ua haujlwm los ntawm kev xaiv tshwj xeeb.

Thaum muaj kev tuag rau standard ntawm cheebtsheej (xws li GB/T23615.1-2017)

PA66GF25 uas muaj peev xwm tsum tau txhawj xeeb rau cov neeg tsim khoom tshwj xeeb xws li Tensile modulus ≥ 4,500 MPa (GB/T23615.1-2017). Cov neeg tsim khoom uas tuaus rau ISO 9001 frameworks muaj 1.5% kev hlo li ntawm yam ntxwv hauv txhua chav, txo qhov risk ntawm thermal break strip failure, uas cuaj ntau dua ib ncig nrog cov khoom tsis tuaj plua pluaj hauv kev load cyclical.

Kev hlo li ntawm moisture raws li qhov root cause

Kev nyiag uas tshuaj ntau li ±0.02% yog qhov sib txawv uas cuam tshuam rau kev plha tawm ntawm qhov chaw, uas cuam tshuam tsim nyog rau kev nyiam siab hauv kev tsis ruaj khaws. Siv dej tso rau saum npaug -40°C yuav pab txo qhov tsis zoo los ntawm 12% mus rau 1.8%, thaum chaws tiv tseg siv cov dej tso cua tiv tau nyiaj li 9 hlis.

Kev Tswj Hauv Kev Nyiag Thiab Kev Sau Ntxov

Yav Tom Ntej Yog Drying Thiab Kev Tswj Dew-Point Hauv Hopper Dryers

PA66GF25 yuav tsum raug siv dej tso rau 100–1 30°C ntawm 4–6 teev kom tau qhov nyiag saum npaug 0.15%. Kev tswj dew point hauv hopper saum npaug -30°C yuav tiv thaiv kev rooj tes dua hauv qhov kev tsim kho, kom muaj kev ruaj khaws thiab txoj kev xaim zoo hauv qhov chaw tiav tshiab.

Kev Sau Ntxov Thiab Kev Tswj Khoom PA66GF25 Granules Uas Xaiv Nyiag

Cov silos muaj kev tswj lub teb chaws thiab muaj kev soj ntsuam nyiag hauv yam sijhawm no, ntxiv rau kev qhia neeg laus txog kev siv airlock, yuav pab kom khoom muaj kev ruaj khaws zoo ib yam thiab txo qhov nyiag tshwm sim hauv qhov kev xa khoom.