Nrog kev siv dav dav ntawm cov hnab yas PP woven, qhov ntim khoom ntawmCov hnab PP woventab tom nce ntxiv, ua rau muaj kev nce ntxiv ntawm cov hnab pov tseg. Kev siv cov hnab pov tseg no dua yog ib qho kev ntsuas zoo los txo cov nqi tsim khoom, tiv thaiv ib puag ncig, thiab siv cov peev txheej tag nrho. Nyob rau xyoo tas los no, ntau lub tuam txhab tsim khoom tau ua kev tshawb fawb hauv thaj chaw no.
Cov kev sib tham no tsom mus rau kev rov ua dua tshiab ntawm cov khoom sivCov hnab PP wovenCov khoom pov tseg yog cov yas PP uas tsim nyog rau kev tsim khoomCov hnab PP wovenQhov no yog ib txoj kev siv cov khib nyiab ntau yam uas muaj qhov yuav tsum tau ua siab heev; nws tsis tuaj yeem sib xyaw nrog lwm hom yas, thiab nws tsis tuaj yeem muaj av nkos, xuab zeb, cov khoom tsis huv, lossis cov khoom tsis huv. Nws cov ntsuas dej ntws yuav tsum nyob hauv qhov ntau ntawm 2-5 (tsis yog txhua yam yas PP tsim nyog). Nws cov peev txheej yog ob qho tseem ceeb: cov khoom pov tseg los ntawm cov txheej txheem tsim cov hnab PP woven thiab cov hnab PP pov tseg rov ua dua tshiab, xws li cov hnab chiv, cov hnab pub, cov hnab ntsev, thiab lwm yam.
2. Cov Txheej Txheem Rov Siv Dua
Muaj ob txoj kev siv rov qab ua dua tshiab tseem ceeb: yaj pelleting thiab extrusion granulation, nrog rau extrusion granulation yog qhov feem ntau. Cov txheej txheem rau ob txoj kev yog raws li nram no.
2.1 Txoj Kev Ua Granulation Yaj
Cov khoom pov tseg - xaiv thiab ntxuav - ziab - txiav ua tej daim me me - ua kom cov khoom sib xyaw ua ke sai (pub mis - cua sov ntsws - txau dej - ua kom cov khoom sib xyaw ua ke) Tso tawm thiab ntim khoom.
2.2 Txoj Kev Ua Granulation Extrusion
Cov khoom pov tseg - xaiv - ntxuav - ziab - txiav ua tej daim me me - cua sov extrusion - txias thiab pelletizing - ntim khoom.
Cov khoom siv siv rau hauv txoj kev extrusion yog lub tshuab extruder ob theem uas ua nws tus kheej. Txhawm rau tshem tawm cov pa roj uas tsim tawm thaum lub sijhawm pov tseg cov khoom siv extrusion, lub tshuab extruder uas muaj qhov cua kuj tseem siv tau. Txhawm rau tshem tawm cov khoom tsis huv ntawm cov khoom siv pov tseg, yuav tsum siv lub vijtsam 80-120 mesh ntawm qhov kawg ntawm lub tshuab extruder. Cov xwm txheej ntawm cov txheej txheem rau kev rov ua dua tshiab tau qhia hauv lub rooj.
Qhov kub ntawm lub tshuab extruder yuav tsum tau tswj kom zoo, tsis txhob siab dhau los yog qis dhau. Qhov kub ntau dhau ua rau cov khoom siv laus thiab daj, lossis txawm tias carbonize thiab tig dub, uas yuav cuam tshuam loj heev rau lub zog thiab tsos ntawm cov yas; qhov kub tsis txaus ua rau cov yas tsis zoo, qhov nrawm extrusion qis, lossis txawm tias tsis muaj cov khoom tso tawm, thiab tshwj xeeb tshaj yog ua rau lub lim dej puas tsuaj. Qhov kub rov ua dua tshiab tsim nyog yuav tsum tau txiav txim siab raws li cov txiaj ntsig ntawm cov dej ntws ntawm txhua pawg ntawm cov khib nyiab rov ua dua tshiab uas tau kuaj thiab sim.
3. Kev Siv Cov Khoom Siv Rov Ua Dua Tshiab thiab Lawv Qhov Cuam Tshuam rau Kev Ua Haujlwm ntawm Lub Hnab PP: Kev laus ntawm lub sijhawm ua cov yas cuam tshuam rau kev ua haujlwm, tshwj xeeb tshaj yog rau cov hnab PP rov ua dua tshiab uas tau dhau los ntawm ob lossis ntau cov txheej txheem thermal. Ua ke nrog kev laus ntawm UV thaum siv ua ntej rov ua dua tshiab, kev ua haujlwm poob qis. Yog li ntawd,Cov hnab PP woventsis tuaj yeem siv dua mus tas li. Yog tias cov khoom siv rov ua dua tshiab siv ib leeg los tsim cov hnab PP, lawv tsuas yog siv tau rov ua dua tshiab tau peb zaug xwb. Vim tias nws nyuaj rau txiav txim siab pes tsawg zaus uas cov khib nyiab rov ua dua tshiab tau ua tiav, kom ntseeg tau tias lub hnab PP zoo, txawm tias rau cov hnab uas muaj qhov yuav tsum tau qis dua, yuav tsum siv cov khoom sib xyaw ntawm cov khoom tshiab thiab cov khoom siv rov ua dua tshiab hauv kev tsim khoom. Qhov sib piv ntawm cov khoom sib xyaw yuav tsum txiav txim siab raws li cov ntaub ntawv ntsuas tiag tiag ntawm ob yam khoom. Qhov ntau ntawm cov khoom siv rov ua dua tshiab siv ncaj qha cuam tshuam rau qhov zoo ntawm cov xov paj PP hnab tiaj tus. Qhov zoo ntawm cov hnab ntaub ntawv nyob ntawm lub zog tensile thiab elongation ntawm cov xov paj tiaj tus. Tus qauv hauv tebchaws (GB8946-88) qhia txog lub zog xov paj tiaj tus ntawm >=0.03 N/denier thiab elongation ntawm 15%-30%. Yog li ntawd, hauv kev tsim khoom, kwv yees li 40% cov khoom siv rov ua dua tshiab feem ntau ntxiv. Nyob ntawm qhov zoo ntawm cov khoom siv rov ua dua tshiab, qhov no qee zaum tuaj yeem nce mus txog 50%-60%. Thaum ntxiv cov khoom siv rov ua dua tshiab ntau dua txo cov nqi tsim khoom, nws ua rau lub hnab zoo tsis zoo. Yog li ntawd, qhov ntau ntawm cov khoom siv rov ua dua tshiab ntxiv yuav tsum tsim nyog, kom ntseeg tau tias zoo. 4. Kev kho rau cov txheej txheem kos duab raws li kev siv cov khoom siv rov ua dua tshiab: Vim yog kev ua kom sov dua thiab UV laus thaum siv ntev, qhov ntsuas yaj ntawm PP rov ua dua tshiab nce nrog txhua lub voj voog ua tiav. Yog li ntawd, thaum ntxiv ntau cov khoom siv rov ua dua tshiab rau cov khoom siv tshiab, qhov kub ntawm extruder, qhov kub ntawm lub taub hau tuag, thiab kev ncab thiab teeb tsa kub yuav tsum txo qis dua li cov khoom siv tshiab. Qhov kev hloov kho yuav tsum txiav txim siab los ntawm kev sim cov ntsuas yaj ntawm cov khoom sib xyaw tshiab thiab rov ua dua tshiab. Ntawm qhov tod tes, vim tias cov khoom siv rov ua dua tshiab dhau los ntawm ntau kauj ruam ua tiav, lawv qhov hnyav molecular txo qis, ua rau muaj ntau cov saw hlau luv luv, thiab lawv kuj tau dhau los ntawm ntau cov txheej txheem ncab thiab kev taw qhia. Yog li ntawd, hauv cov txheej txheem tsim khoom, qhov piv ntawm kev ncab yuav tsum qis dua li ntawm tib hom khoom siv tshiab. Feem ntau, qhov piv ntawm kev ncab ntawm cov khoom siv tshiab yog 4-5 zaug, thaum tom qab ntxiv 40% cov khoom siv rov ua dua tshiab, nws feem ntau yog 3-4 zaug. Ib yam li ntawd, vim yog qhov ntsuas yaj ntawm cov khoom siv rov ua dua tshiab nce ntxiv, qhov viscosity txo qis, thiab qhov nrawm ntawm extrusion nce ntxiv. Yog li ntawd, nyob rau hauv tib lub qhov ceev thiab qhov kub ntawm lub hau ntswj, qhov ceev ntawm kev kos duab yuav tsum nrawm dua me ntsis. Thaum sib xyaw cov khoom siv tshiab thiab qub, nws yog ib qho tseem ceeb kom ntseeg tau tias muaj kev sib xyaw zoo ib yam; tib lub sijhawm, cov khoom siv raw nrog cov ntsuas yaj zoo sib xws yuav tsum tau xaiv rau kev sib xyaw. Qhov sib txawv loj ntawm cov ntsuas yaj thiab qhov kub yaj txhais tau tias ob yam khoom siv raw tsis tuaj yeem ua yas tib lub sijhawm thaum lub sijhawm ua yas extrusion, uas yuav cuam tshuam loj heev rau qhov ceev ntawm extrusion, ua rau muaj qhov seem ntau, lossis ua rau tsis yooj yim tsim khoom.
Raws li tau hais los saum toj no, kev siv rov qab thiab kev siv dua ntawm cov khoomPPntaubhnabua tau tag nrho yog tias xaiv cov khoom siv zoo, tsim cov txheej txheem kom raug, thiab tswj cov txheej txheem kom raug. Nws yuav tsis cuam tshuam rau qhov zoo ntawm cov khoom, thiab cov txiaj ntsig kev lag luam tseem ceeb heev.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-13-2025