Mubikorwa byo kubyaraPP imyenda idoda, ibintu bitandukanye bishobora kugira ingaruka kumiterere yibicuruzwa. Gusesengura isano iri hagati yibi bintu nibikorwa byibicuruzwa bifasha kugenzura neza imikorere yimikorere no kubona ubuziranenge bwo hejuru kandi bukoreshwa cyane PP idoda imyenda. Hasi, umwanditsi mukuru wa Chengxin adoda imyenda azasesengura muri make ibintu byingenzi bigira ingaruka kumiterere yimyenda ya PP idoda, hanyuma asangire nabantu bose:
1. Gushonga indangagaciro hamwe nuburemere bwa molekuline ikwirakwizwa rya PP idoda idoda imyenda ya polypropilene
Ibipimo byingenzi byerekana ubuziranenge bwa polypropilene ni uburemere bwa molekile, gukwirakwiza uburemere bwa molekile, guhora, gushonga, hamwe nivu. Imipira ya PP ikoreshwa mukuzunguruka ifite uburemere bwa molekile hagati ya 100000 na 250000, ariko imyitozo yerekanye ko imiterere ya rheologiya yo gushonga ari nziza mugihe uburemere bwa molekile ya polypropilene bugera ku 120000, kandi umuvuduko mwinshi wemewe wo kuzunguruka nawo uri hejuru. Icyerekezo cyo gushonga nikintu kigaragaza imiterere ya rheologiya yo gushonga, hamwe nigipimo cyo gushonga cya chipi ya polypropilene ikoreshwa kurispunbondni hagati ya 10 na 50. Mugihe cyo kuzunguruka, filament yakira gusa umushinga umwe wo mu kirere, kandi igipimo cyimibare ya filament kigarukira kumiterere ya rheologiya yo gushonga.
Ninini yuburemere bwa molekuline, ni ukuvuga ntoya ya eregitoronike ishonga, niko imiterere ya rheologiya ikennye. Gutoya igipimo cyagereranijwe cyabonetse na filament, nini nini ya fibre ya filament yabonetse munsi yingero zingana zashizwe muri spinneret, bikavamo ukuboko gukomeye kumva PP idoda. Niba igipimo cyo gushonga kiri hejuru, ubwiza bwikigereranyo bugabanuka, imiterere ya rheologiya nibyiza, kandi kurwanya kurambura bigabanuka. Muburyo bumwe bwo kurambura, ubwinshi bwo kurambura bwiyongera. Mugihe icyerekezo cya macromolecules cyiyongera, imbaraga zo kumena imyenda PP idoda iziyongera, kandi ingano ya fibre ya filament izagabanuka, bivamo imyenda yoroshye yimyenda. Muburyo bumwe, urwego rwo hejuru rwashonga rwa polypropilene, ingano ya fibre ntoya, nimbaraga nini zo kuvunika.
Ikwirakwizwa ry'uburemere bwa molekuline akenshi ripimwa ku kigereranyo (Mw / Mn) cy'uburemere bw'uburemere bwa molekile (Mw) n'umubare ugereranije uburemere bwa molekile (Mn) ya polymer, izwi nk'agaciro ko gukwirakwiza uburemere bwa molekile. Gutoya kugabanya uburemere bwa molekuline, niko bigenda bihindagurika imiterere ya rheologiya yo gushonga kwayo, hamwe nuburyo bukomeye bwo kuzunguruka, bifasha kuzamura umuvuduko wo kuzunguruka. Ifite kandi ubukonje buke bwo gushonga hamwe nubukonje bukabije, bushobora kugabanya imihangayiko yo kuzunguruka, bigatuma PP yoroshye kurambura kandi neza, no kubona fibre nziza yo guhakana. Byongeye kandi, uburinganire bwurubuga ni byiza, hamwe nintoki nziza wumva kandi uburinganire.
2. PP idoda idoda imyenda izunguruka
Igenamiterere ry'ubushyuhe buzenguruka biterwa no gushonga kw'ibikoresho fatizo n'ibisabwa ku miterere y'ibicuruzwa. Iyo urwego rwo hejuru rwo gushonga rwibikoresho fatizo, niko hejuru yubushyuhe bwo kuzenguruka, naho ubundi. Ubushyuhe bwo kuzunguruka bufitanye isano itaziguye nubwiza bwashonga, kandi ubushyuhe buri hasi. Ubukonje bwashonga ni bwinshi, bigatuma kuzunguruka bigoye kandi bikunda kubyara fibre yamenetse, ikomeye cyangwa yoroheje, bigira ingaruka kumiterere yibicuruzwa. Kubwibyo, kugirango ugabanye ubukonje bwashonga no kunoza imiterere ya rheologiya, uburyo bwo kuzamura ubushyuhe burakoreshwa. Ubushyuhe bwo kuzunguruka bugira ingaruka zikomeye kumiterere n'imiterere ya fibre. Hasi yubushyuhe bwo kuzenguruka, niko hejuru yubukonje bukabije bwashonga, niko birwanya ubukana, kandi biragoye kurambura filament kugirango ubone ubunini bwa fibre imwe
Igihe cyo kohereza: Werurwe-16-2024