Kev lag luam thov rau siab melting point PP
Kev ua tau zoo ntawm cov dej ntws ntawm polypropylene yog ze ze rau nws qhov hnyav molecular. Qhov nruab nrab molecular hnyav ntawm kev lag luam polypropylene cob npaj los ntawm cov pa Ziegler Natta catalytic system feem ntau yog nruab nrab ntawm 3 × 105 thiab 7 × 105. Lub melt index ntawm cov papolypropylene resinsfeem ntau yog tsawg, uas txwv lawv daim ntawv thov ntau yam.
Nrog rau txoj kev loj hlob sai ntawm kev lag luam fiber ntau thiab textile machinery kev lag luam, kev lag luam non-woven npuag tau nce sai heev. Cov koob ntawm qhov zoo ntawm polypropylene ua rau nws nyiam raw khoom rau cov ntaub tsis-woven. Nrog rau txoj kev loj hlob ntawm haiv neeg, daim ntawv thov teb ntawm non-woven fabrics tau ua dav. Hauv kev kho mob thiab kev noj qab haus huv, cov ntaub ntawv tsis-woven tuaj yeem siv los tsim cov khoom sib cais, lub ntsej muag, cov ris tsho phais, cov poj niam cov ntaub so ntswg, cov ntaub so ntswg menyuam yaus, thiab lwm yam; Raws li lub tsev thiab geotechnical cov ntaub ntawv, non-woven fabrics yuav siv tau rau ru tsev waterproofing, kev tsim kho, dej conservancy engineering, los yog siab heev ru tsev xav tau yuav ua tau siv spunbond thiab koob punched composite technology. Nws lub neej kev pabcuam yog 5-10 npaug ntev dua li kev xav asphalt; Cov ntaub ntawv lim kuj yog ib qho ntawm cov khoom tsim kho sai tshaj plaws rau cov ntaub ntawv tsis-woven, uas tuaj yeem siv rau kev siv roj thiab kua lim hauv kev lag luam xws li tshuaj qhuav, tshuaj, thiab khoom noj khoom haus, thiab muaj peev xwm ua lag luam zoo; Tsis tas li ntawd, cov ntaub ntawv uas tsis yog-woven tuaj yeem siv rau hauv kev tsim cov tawv hluavtaws, lub nra, cov khaub ncaws hauv ob sab phlu, cov ntaub zoo nkauj, thiab cov ntaub so hauv tsev.
Nws yog precisely vim hais tias ntawm tas mus li txoj kev loj hlob ntawmnon-woven fabricstias qhov yuav tsum tau ua rau lawv cov khoom thiab daim ntawv thov yog tas li nce, xws li yaj tshuab, high-speed ntau lawm, nyias cov khoom, thiab lwm yam. Yog li ntawd, qhov yuav tsum tau rau kev ua tau zoo ntawm polypropylene resin, lub ntsiab raw khoom ntawm non-woven fabrics, kuj tau correspondingly nce; Tsis tas li ntawd, kev tsim cov high-speed spinning los yog nplua denier polypropylene fibers kuj yuav tsum tau polypropylene resin kom muaj kev ua haujlwm zoo yaj; Qee cov xim uas tsis tuaj yeem tiv taus qhov kub thiab txias yuav tsum tau polypropylene ua cov cab kuj nrog cov txheej txheem ua haujlwm qis. Tag nrho cov no yuav tsum tau siv ultra-high melt index polypropylene resin ua raw khoom uas tuaj yeem ua tiav ntawm qhov kub thiab txias.
Cov khoom tshwj xeeb rau yaj tshuab yog polypropylene nrog siab yaj Performance index. Melt index yog hais txog qhov loj ntawm cov khoom molten dhau los ntawm tus qauv capillary raj txhua 10 feeb. Qhov siab dua tus nqi, qhov zoo dua qhov kev ua haujlwm fluidity ntawm cov khoom. Qhov siab dua qhov melt index ntawm polypropylene, qhov zoo dua cov fibers txau tawm, thiab qhov zoo dua qhov pom kev ua tau zoo ntawm cov ntaub yaj uas tau tsim.
Txoj kev npaj siab yaj Performance index polypropylene cob
Ib qho yog los tswj qhov hnyav molecular thiab qhov hnyav molecular faib ntawm polypropylene los ntawm kev tswj cov txheej txheem polymerization cov tshuaj tiv thaiv, xws li txo qhov hnyav molecular ntawm cov polymer los ntawm kev nce cov concentration ntawm cationic agents xws li hydrogen gas, yog li txhim kho cov yaj index. Txoj kev no yog txwv los ntawm cov yam ntxwv xws li catalytic system thiab cov tshuaj tiv thaiv kab mob, ua rau nws nyuaj rau kev tswj xyuas qhov ruaj khov ntawm yaj Performance index thiab siv nws.
Yanshan Petrochemical tau ncaj qha polymerizing yaj cov ntaub ntawv nrog lub yaj qhov ntsuas ntawm ntau tshaj 1000 siv metallocene catalysts hauv ob peb xyoos dhau los. Vim yog qhov nyuaj ntawm kev tswj kev ruaj ntseg, qhov loj-scale polymerization tsis tau ua tiav. Txij li thaum muaj tus kab mob sib kis xyoo no, Yanshan Petrochemical tau txais kev tswj hwm kev degradation polypropylene yaj cov khoom siv tshuab tsim tawm hauv xyoo 2010 los tsim cov khoom siv polypropylene yaj uas tsis yog-woven npuag tshwj xeeb rau lub Ob Hlis 12. Tib lub sijhawm, kev sim kev lag luam tau ua ntawm cov cuab yeej siv metallocene catalysts. Cov khoom tau raug tsim tawm thiab tam sim no raug xa mus rau cov neeg siv qis rau kev sim.
Lwm txoj kev yog los tswj cov degradation ntawm polypropylene tau los ntawm cov pa polymerization, txo nws cov hnyav molecular, thiab ua kom nws cov yaj index.
Yav dhau los, cov txheej txheem kub kub degradation feem ntau yog siv los txo qhov hnyav molecular ntawm polypropylene, tab sis qhov kub-kub mechanical degradation txoj kev no muaj ntau yam drawbacks, xws li additive poob thiab thermal decomposition, thiab cov txheej txheem tsis ruaj khov. Tsis tas li ntawd, muaj cov txheej txheem xws li ultrasonic degradation, tab sis cov txheej txheem no feem ntau xav kom muaj cov kuab tshuaj, uas ua rau kom muaj kev nyuaj thiab tus nqi ntawm cov txheej txheem. Nyob rau hauv xyoo tas los no, cov txheej txheem ntawm cov tshuaj degradation ntawm polypropylene tau maj mam siv dav.
Kev tsim tawm ntawm High Melt Finger PP los ntawm Tshuaj Degradation Method
Txoj kev degradation tshuaj muaj xws li reacting polypropylene nrog tshuaj degradation agents xws li organic peroxides nyob rau hauv ib tug ntsia hlau extruder, ua rau lub molecular saw ntawm polypropylene tawg thiab txo nws cov molecular hnyav. Piv nrog rau lwm txoj kev degradation, nws muaj qhov zoo ntawm kev ua kom tiav degradation, zoo yaj fluidity, yooj yim thiab muaj peev xwm npaj txheej txheem, thiab yog ib qho yooj yim mus nqa tawm loj-scale industrial ntau lawm. Qhov no kuj yog txoj kev siv ntau tshaj plaws los ntawm kev hloov kho yas manufacturers.
Cov khoom siv
High melting point yog txawv kiag li los ntawm cov khoom siv hloov kho PP. Cov cuab yeej siv rau cov khoom siv molten yuav tsum muaj qhov sib piv ntev dua, thiab lub taub hau tshuab yuav tsum tau ntsug lossis siv cov granulation hauv qab dej (Wuxi Huachen muaj qhov zoo sib xws hauv qab dej txiav); Cov khoom yog nyias nyias thiab yuav tsum tau los rau hauv kev sib cuag nrog dej tam sim ntawd tom qab tawm ntawm lub tshuab taub hau kom yooj yim txias;
Rau zus tau tej cov pa polypropylene, txiav ceev ntawm lub extruder yog 70 meters ib feeb, thaum lub siab yaj polypropylene, txiav ceev yuav tsum siab tshaj 120 meters ib feeb. Tsis tas li ntawd, vim yog qhov ceev ceev ntawm cov kua nplaum polypropylene siab, nws qhov txias txias yuav tsum tau nce los ntawm 4 meters mus rau 12 meters.
Lub tshuab ua cov khoom siv yaj yuav tsum tau hloov mesh txuas ntxiv, feem ntau yog siv ob lub chaw nres tsheb mesh hloov pauv. Cov kev xav tau ntawm lub cev muaj zog yog ntau dua, thiab ntau dua shear blocks yuav siv rau hauv cov khoom siv ntsia hlau; Raws li Koyapan, txoj kab ntxaib ntsia hlau ua los ntawm cov khoom siv tshwj xeeb yaj muaj qhov tshwj xeeb zoo.
1. Xyuas kom ruaj khov noj (PP, DCP, thiab lwm yam);
2. Txiav txim siab qhov tsim nyog nam piv thiab axial txoj hauj lwm ntawm qhov qhib raws li ib nrab-lub neej ntawm cov qauv sib xyaw (evolved mus rau tiam thib peb los xyuas kom meej extrusion du ntawm CR-PP cov tshuaj tiv thaiv);
3. Los xyuas kom meej tias cov ntiv tes yaj muaj cov txiaj ntsig siab nyob rau hauv qhov kev kam rau siab (ntau tshaj 30 lub strips tiav muaj tus nqi siab dua thiab kev sib xyaw ua ke piv rau ib lub kaum ntse ntse);
4. Cov kua dej tshwj xeeb pwm taub hau yuav tsum tau nruab. Qhuav thiab cua sov yuav tsum sib xws, thiab cov khoom pov tseg yuav tsum me me;
5. Nws yog qhov zoo dua los nruab nrog lub tshuab ua kom txias txias granulator rau cov khoom siv yaj (uas muaj lub koob npe nrov hauv kev lag luam) kom ntseeg tau tias cov khoom tiav tiav thiab qib siab dua;
6. Nws yuav zoo dua yog tias muaj cov lus qhia hauv online. Tsis tas li ntawd, qhov sib ntxiv ntawm cov kua degradation pib rau sab pub yuav tsum muaj qhov tseeb dua vim qhov me me ntawm cov khoom ntxiv. Rau sab pub khoom siv, xws li imported Brabenda, Kubota, domestically tsim Matsunai, thiab lwm yam.
Tam sim no siv degradation catalysts
1: Dit-butyl peroxide, tseem hu ua di-tert-butyl peroxide, pib a, vulcanizing tus neeg sawv cev dTBP, yog cov xim tsis muaj xim rau me ntsis daj pob tshab kua uas yog insoluble hauv dej thiab miscible nrog cov kuab tshuaj organic xws li benzene, toluene, thiab acetone. Muaj zog oxidizing, flammable, kuj ruaj khov ntawm chav tsev kub, insensitive rau tej yam.
2: Muab ob npaug rau tsib sulfurizer, abbreviated li DBPH, tshuaj lub npe 2,5-dimethyl-2,5-bis (tert butylperoxy) hexane, molecular hnyav 290.44. Cov kua daj daj daj nrog cov txheeb ze ntom ntom ntawm 0.8650 nyob rau hauv daim ntawv ntawm lub suab thiab milky dawb hmoov. Qhov chaw khov yog 8 ℃. Kub taw tes 50 ~ 52 ℃ (13Pa). Lub refractive index yog li ntawm 1.418 txog 1.419. Lub viscosity ntawm cov kua yog 6.5mPa. s. Flash point (qhib khob) 58 ℃. Soluble nyob rau hauv feem ntau organic solvents xws li cawv, ethers, ketones, esters, aromatic hydrocarbons, thiab lwm yam, insoluble nyob rau hauv dej.
3: Kev ntsuam xyuas ntawm cov ntiv tes fused
Kev ntsuas cov ntiv tes yaj yuav tsum tau ua raws li GBIT 30923-2014 Polypropylene Melt Spray Cov Khoom Tshwj Xeeb; Kev ntsuas cov ntiv tes zoo tib yam tsis tuaj yeem kuaj. High melting yog hais txog kev siv txoj kev volumetric es tsis yog cov txheej txheem loj rau kev sim.
Cov khoom siv hauv tsev muaj xws li Chengde Youte, Guangxin Electronic Technology, Hangzhou Jinmai, Jilin Science thiab Education Instrument Factory, thiab cov khoom siv txawv teb muaj xws li Zwick; Chengde Jinjian Testing Instrument Co., Ltd. ua ib qho MFL-2322H melt flow rate meter tshwj xeeb tsim rau NVR ntsuas ntawm ultra-high flow polypropylene cov khoom siv Hoobkas, 309232014 Polypropylene Melt Spray Cov ntaub ntawv tshwj xeeb. Qhov ntsuas qhov ntsuas yog (500-2500) cm / 10min.
Tam sim no, muaj:
1. Shandong Daoen Polymer Khoom Co., Ltd
2. Hunan Shengjin Tshiab Khoom Co., Ltd
3. Jinfa Technology Co., Ltd
4. Beijing Yishitong Tshiab Materials Development Co., Ltd
5. Shanghai Huahe Composite Materials Co., Ltd
6. Hangzhou Chenda Tshiab Khoom Co., Ltd
7. Basel, Dalin, Kaus Lim Qab Teb
Post lub sij hawm: Apr-01-2024