Nrog rau kev siv dav ntawm PP hnab yas woven, ntau lawm ntim ntawmPP woven hnabyog nce, ua rau muaj kev nce siab ntawm cov hnab khib nyiab. Kev rov ua dua cov hnab khib nyiab no yog qhov ntsuas tau zoo los txo cov nqi tsim khoom, tiv thaiv ib puag ncig, thiab siv cov peev txheej tag nrho. Nyob rau hauv xyoo tas los no, ntau lub tuam txhab tau tshawb fawb hauv cheeb tsam no.
Qhov kev sib tham no tsom mus rau kev rov ua dua tshiabPP woven hnab. Cov ntaub ntawv pov tseg xa mus rau PP yas pov tseg tsim nyog rau kev tsim khoomPP woven hnab. Qhov no yog ib hom kev siv pov tseg ib leeg nrog kev xav tau siab; Nws tsis tuaj yeem tov nrog lwm hom yas, thiab nws tsis tuaj yeem muaj av nkos, xuab zeb, impurities, lossis mechanical impurities. Nws melt flow index yuav tsum nyob rau hauv thaj tsam ntawm 2-5 (tsis yog tag nrho cov PP yas yog haum). Nws cov peev txheej yog ob npaug: cov ntaub ntawv pov tseg los ntawm cov txheej txheem PP woven hnab thiab cov khoom siv pov tseg PP, xws li hnab ntim khoom noj, hnab ntim ntsev, thiab lwm yam.
2. Cov txheej txheem rov ua dua tshiab
Muaj ob txoj hauv kev rov ua dua tshiab: yaj pelleting thiab extrusion granulation, nrog extrusion granulation yog feem ntau. Cov txheej txheem rau ob txoj kev yog raws li hauv qab no.
2.1 Melt Granulation Method
Cov khoom pov tseg - xaiv thiab ntxuav - ziab - txiav rau hauv strips - high-speed granulation (feem ntau - tshav kub shrinking - dej spraying - granulation) Tshem tawm thiab ntim.
2.2 Extrusion Granulation Method
Cov khoom pov tseg - xaiv - ntxuav - ziab - txiav rau hauv strips - rhuab extrusion - txias thiab pelletizing - ntim.
Cov cuab yeej siv hauv txoj kev extrusion yog tus kheej ua ob-theem extruder. Txhawm rau tshem tawm cov roj tsim tawm thaum lub sij hawm pov tseg cov khoom siv extrusion, lub vented extruder kuj siv tau. Txhawm rau tshem tawm impurities los ntawm cov khoom pov tseg, 80-120 mesh screen yuav tsum tau siv ntawm qhov kawg extruder paug. Cov txheej txheem cov txheej txheem rau recycled extrusion yog qhia nyob rau hauv lub rooj.
Qhov kub ntawm lub extruder yuav tsum tau tswj kom zoo, tsis kub dhau los yog qis heev. Qhov kub thiab txias tau yooj yim ua rau cov khoom muaj hnub nyoog thiab daj, lossis txawm tias carbonize thiab tig dub, uas yuav cuam tshuam rau lub zog thiab cov tsos ntawm cov yas; Qhov kub tsis txaus ua rau cov yas tsis zoo, tus nqi qis extrusion, lossis txawm tias tsis muaj cov khoom tsim tawm, thiab tshwj xeeb tshaj yog ua rau cov ntxaij lim dej puas. Qhov tsim nyog rov ua dua tshiab extrusion kub yuav tsum tau txiav txim siab raws li cov txiaj ntsig ntawm cov dej ntws ntawm txhua pawg ntawm cov khoom siv rov ua dua tshiab thiab kuaj.
3. Kev siv cov khoom siv rov ua dua tshiab thiab lawv qhov cuam tshuam rau PP Hnab Kev Ua Haujlwm: Thermal aging thaum lub sij hawm ua cov yas cuam tshuam rau kev ua tau zoo, tshwj xeeb tshaj yog rau cov khoom siv PP woven hnab uas tau dhau los ua ob lossis ntau cov txheej txheem thermal. Ua ke nrog UV kev laus thaum siv ua ntej rov ua dua, kev ua haujlwm tsis zoo pom zoo. Yog li ntawd,PP woven hnabtsis tuaj yeem rov siv dua tsis muaj sijhawm. Yog tias cov khoom siv rov qab siv ib leeg los tsim cov hnab PP, lawv tsuas tuaj yeem siv tau ntau tshaj peb zaug. Txij li thaum nws yog ib qho nyuaj los txiav txim seb lub sij hawm siv cov khoom pov tseg tau ua tiav, kom ntseeg tau tias lub hnab PP zoo, txawm tias cov hnab ntim nrog qis dua, yuav tsum siv cov khoom siv nkauj xwb thiab cov khoom siv rov ua dua tshiab. Qhov sib piv ntawm qhov sib tov yuav tsum tau txiav txim siab raws li qhov tseeb ntsuas cov ntaub ntawv ntawm ob cov ntaub ntawv. Tus nqi ntawm cov khoom siv rov qab siv ncaj qha cuam tshuam rau qhov zoo ntawm PP hnab ca xov paj. Qhov zoo ntawm woven hnab hinges ntawm tus txheeb ze tensile lub zog thiab elongation ntawm lub tiaj yarns. Lub teb chaws tus qauv (GB8946-88) qhia txog cov xov paj tiaj tus ntawm> = 0.03 N / denier thiab elongation ntawm 15% -30%. Yog li, hauv kev tsim khoom, kwv yees li 40% cov khoom siv rov ua dua yog feem ntau ntxiv. Nyob ntawm qhov zoo ntawm cov khoom siv rov ua dua tshiab, qee zaum tuaj yeem nce mus rau 50% -60%. Thaum ntxiv cov khoom siv rov ua dua tshiab txo cov nqi tsim khoom, nws cuam tshuam lub hnab zoo. Yog li ntawd, tus nqi ntawm cov khoom siv rov ua dua ntxiv yuav tsum tsim nyog, ua kom zoo. 4. Kev hloov kho rau cov txheej txheem kos duab raws li kev siv cov khoom siv rov ua dua: Vim rov ua cov cua sov thiab UV aging thaum lub sij hawm siv mus ntev, lub melt index ntawm recycled PP nce nrog txhua lub voj voog ua. Yog li ntawd, thaum ntxiv cov khoom siv rov ua dua tshiab rau cov khoom siv nkauj xwb, qhov extruder kub, tuag lub taub hau kub, thiab ncab thiab teeb tsa qhov kub thiab txias yuav tsum tau qis qis dua piv rau cov khoom siv nkauj xwb. Qhov kev hloov pauv yuav tsum tau txiav txim siab los ntawm kev ntsuas qhov ntsuas qhov ntsuas ntawm cov khoom siv tshiab thiab rov ua dua tshiab. Ntawm qhov tod tes, vim tias cov khoom siv rov ua dua tau dhau los ua ntau cov kauj ruam ua, lawv qhov hnyav molecular txo, ua rau muaj coob tus luv luv molecular chains, thiab lawv kuj tau ua tiav ntau yam kev ncab thiab kev taw qhia. Yog li ntawd, nyob rau hauv cov txheej txheem ntau lawm, lub stretching piv yuav tsum qis dua li ntawm tib hom ntawm cov khoom nkauj xwb. Feem ntau, qhov sib piv ntawm cov khoom siv nkauj xwb yog 4-5 zaug, thaum tom qab ntxiv 40% cov khoom siv rov ua dua tshiab, feem ntau yog 3-4 zaug. Ib yam li ntawd, vim qhov nce melt index ntawm cov khoom siv rov ua dua, cov viscosity txo, thiab tus nqi extrusion nce. Yog li ntawd, nyob rau hauv tib lub ntsia hlau ceev thiab kub tej yam kev mob, daim duab ceev yuav tsum tau ceev me ntsis. Hauv kev sib xyaw ntawm cov khoom siv tshiab thiab qub, nws yog ib qho tseem ceeb kom ntseeg tau tias kev sib xyaw ua ke; Nyob rau tib lub sijhawm, cov khoom siv raw nrog cov ntsuas zoo sib xws yuav tsum raug xaiv rau kev sib xyaw. Qhov sib txawv loj nyob rau hauv melting indices thiab melting kub txhais tau hais tias ob raw khoom yuav tsis tau plasticized ib txhij thaum lub sij hawm plasticizing extrusion, uas yuav cuam tshuam rau lub extrusion stretching ceev, uas ua rau ib tug siab npaum li cas ntawm cov khoom, los yog txawm ua tsis tau tejyam ntau lawm.
Raws li tau hais los saum toj no, kev rov ua dua thiab rov siv duaPPwovenhnabyog ua tau tag nrho nrog cov khoom siv ceev faj xaiv, tsim cov txheej txheem tsim nyog, thiab kev tswj xyuas cov txheej txheem tsim nyog thiab raug. Nws yuav tsis cuam tshuam rau cov khoom zoo, thiab cov txiaj ntsig kev lag luam tseem ceeb heev.
Post lub sij hawm: Nov-13-2025