1. Lambar danko
Adadin danko yana nuna matsakaicin nauyin kwayoyin halitta na resin kuma shine babban siffa don tantance nau'in resin. Halaye da amfani da resin sun bambanta dangane da danko. Yayin da matakin polymerization na resin PVC ke ƙaruwa, halayen injiniya kamar ƙarfin tensile, ƙarfin tasiri, ƙarfin karyewa, da tsayin daka yayin karyewa ke ƙaruwa, yayin da ƙarfin samarwa ke raguwa. Sakamakon bincike ya nuna cewa yayin da matakin polymerization na aikin PVC ke ƙaruwa, halayen asali na resin suna inganta, yayin da aikin sarrafawa da halayen rheological ke raguwa. Ana iya ganin cewa rarraba nauyin kwayoyin halitta na resin PVC yana da alaƙa ta kud da kud da sarrafa filastik da aikin samfur.
2. Yawan ƙwayoyin da ba su da tsabta (ɗigo baƙi da rawaya)
Barbashi na datti suna ɗaya daga cikin muhimman alamomi don kimanta resin PVC. Babban abubuwan da ke shafar wannan alamar sune: na farko, ba a wanke kayan da suka rage a bangon rufi na tukunyar polymerization sosai ba kuma kayan an gurbata su da ƙazanta; na biyu, lalacewar injiniya tare da ƙazanta da rashin aiki yadda ya kamata yana haifar da ƙazanta; A cikin aikin sarrafa filastik, idan akwai barbashi na datti da yawa, zai yi mummunan tasiri akan aiki da amfani da kayayyakin PVC da aka samar. Misali, a cikin sarrafawa da siffanta bayanan martaba, akwai ƙazanta da barbashi da yawa, waɗanda zasu iya haifar da tabo a saman bayanin martaba, ta haka rage tasirin samfurin. Bugu da ƙari, saboda rashin plasticization na barbashi na datti ko ƙarancin ƙarfi duk da plasticization, halayen injinan samfurin suna raguwa.
3. Masu canzawa (gami da ruwa)
Wannan alamar tana nuna asarar nauyi na resin bayan an dumama shi a wani zafin jiki. Ƙarancin abubuwan da ke cikin abubuwan da ke canzawa na iya samar da wutar lantarki mai tsauri cikin sauƙi, wanda ba ya da amfani ga ayyukan ciyarwa yayin sarrafawa da ƙera su; Idan abubuwan da ke cikin abubuwan da ke canzawa sun yi yawa, resin yana iya taruwa da rashin ruwa sosai, kuma ana samun kumfa cikin sauƙi yayin ƙera da sarrafawa, wanda ke da mummunan tasiri ga ingancin samfur.
4. Yawan da aka gani a fili
Yawan da aka bayyana a fili shine nauyin kowace naúrar foda resin PVC wanda ba a matse shi ba. Yana da alaƙa da yanayin barbashi, matsakaicin girman barbashi, da rarraba girman barbashi na resin. Ƙananan yawan da aka bayyana a fili, babban girma, shan robobi cikin sauri, da sauƙin sarrafawa. Akasin haka, matsakaicin yawan barbashi da ƙaramin girma yana haifar da shan robobi na PVC. Don samar da samfuran tauri, buƙatar nauyin kwayoyin halitta ba ta da yawa, kuma gabaɗaya ba a ƙara robobi yayin sarrafawa. Saboda haka, ana buƙatar porosity na barbashi resin ya zama ƙasa, amma akwai buƙatar busasshen kwararar resin, don haka yawan resin da aka bayyana ya fi girma.
5. Shakar resin mai amfani da filastik
Yawan shan sinadarin PVC da ke taimakawa wajen sarrafa shi yana nuna matakin ramuka a cikin barbashin resin, tare da yawan shan mai da kuma babban porosity. Resin yana shan robobi da sauri kuma yana da kyakkyawan aikin sarrafawa. Don gyaran fitar da iska (kamar profiles), kodayake buƙatar porosity na resin ba ta da yawa, ramukan da ke cikin barbashin suna da kyakkyawan tasirin shaye-shaye akan ƙara ƙarin abubuwa yayin sarrafawa, wanda ke haɓaka ingancin ƙarin abubuwa.
6. Farin fata
Farin yana nuna kamanni da launin resin, da kuma lalacewar da rashin kwanciyar hankali na zafi ko kuma tsawon lokacin riƙewa ke haifarwa, wanda ke haifar da raguwar farin fari sosai. Matsayin farin yana da tasiri sosai kan tsufan juriyar bishiyoyi da kayayyaki.
7. Sauran sinadarin vinyl chloride
Ragowar VCM tana nufin ɓangaren resin da ba a shanye shi ko ya narke a cikin polyethylene monomer ba, kuma ƙarfin shaye-shayensa ya bambanta dangane da nau'in resin. A cikin ainihin abubuwan da ke haifar da ragowar VCM, manyan abubuwan sun haɗa da ƙarancin zafin saman hasumiyar cirewa, bambancin matsin lamba mai yawa a cikin hasumiyar, da kuma mummunan yanayin barbashi na resin, waɗanda duk zasu iya shafar cirewar ragowar VCM, wanda shine alamar auna matakin tsafta na resins. Ga samfura na musamman, kamar jakunkunan marufi masu tauri na fim mai haske don magunguna na likitanci, ragowar abun ciki na resin VCM bai kai matsayin da aka saba ba (ƙasa da 5PPM).
8. Daidaiton zafi
Idan ruwan da ke cikin monomer ya yi yawa, zai samar da acidity, ya lalata kayan aiki, ya samar da tsarin polymerization na ƙarfe, kuma a ƙarshe zai shafi daidaiton zafi na samfurin. Idan hydrogen chloride ko free chlorine yana cikin monomer, zai yi mummunan tasiri akan amsawar polymerization. Hydrogen chloride yana da saurin samuwa a cikin ruwa, wanda ke rage ƙimar pH na tsarin polymerization kuma yana shafar daidaiton tsarin polymerization. Bugu da ƙari, yawan acetylene a cikin monomer na samfurin yana shafar daidaiton zafi na PVC a ƙarƙashin tasirin haɗin gwiwa na acetaldehyde da ƙarfe, wanda ke shafar aikin sarrafa samfurin.
9. Ragowar sieve
Ragowar sieve tana nuna matakin rashin daidaiton girman barbashi na resin, kuma manyan abubuwan da ke tasiri a cikinsa sune adadin mai warwatsewa a cikin dabarar polymerization da tasirin juyawa. Idan barbashin resin sun yi kauri sosai ko kuma sun yi kyau sosai, zai shafi matakin resin kuma yana da tasiri kan sarrafa samfurin na gaba.
10. "Idon Kifi"
"Fish eye", wanda aka fi sani da crystal point, yana nufin barbashi masu haske na resin waɗanda ba a yi musu robobi a ƙarƙashin yanayin sarrafa thermoplastic na yau da kullun ba. Tasirin da ke cikin ainihin samarwa. Babban abin da ke haifar da "kifin ido" shi ne lokacin da abubuwan da ke cikin monomer ɗin suka yi yawa, yana narkar da polymer ɗin da ke cikin barbashi yayin aikin polymerization, yana rage porosity, yana sa barbashi su yi tauri, kuma ya zama "kifin ido" na ɗan lokaci yayin sarrafa robobi. Mai farawa yana rarrabawa ba daidai ba a cikin ɗigon mai na monomer. A cikin tsarin polymerization tare da canja wurin zafi mara daidai, samuwar resin tare da nauyin kwayoyin halitta mara daidai, ko ƙazanta na reactor yayin ciyarwa, resin da ya rage, ko mannewa da yawa na kayan reactor duk na iya haifar da "fisheye". Samuwar "kifin ido" kai tsaye yana shafar ingancin samfuran PVC, kuma a cikin sarrafawa na gaba, zai shafi kyawun saman samfuran. Hakanan zai rage halayen injiniya kamar ƙarfin tauri da tsawaita samfuran, wanda zai iya haifar da huda fina-finai ko zanen filastik cikin sauƙi, musamman samfuran kebul, wanda zai shafi halayen rufin lantarki. Yana ɗaya daga cikin mahimman alamomi a cikin samar da resins da sarrafa plasticization.
Lokacin Saƙo: Yuni-12-2024
