Samfuran PVC masu laushi sun ƙunshi wasu abubuwan da aka gyara filastik. Waɗannan masu yin robobi za su yi ƙaura, cirewa kuma su canza zuwa digiri daban-daban yayin sarrafa na biyu da amfani da samfuran. Asarar filastik ba kawai zai rage aikin samfuran PVC ba, har ma yana lalata saman samfuran da lambobin sadarwa. Mafi mahimmanci, zai kawo jerin matsaloli ga muhalli da lafiyar ɗan adam. Sabili da haka, ƙaura da cirewar filastik ya zama babban cikas da ke hana aikace-aikacen faffadan samfuran PVC masu laushi.

A cikin tsarin PVC, ƙananan ƙarancin oxidized polyethylene da kakin zuma za a iya yin filastik kafin lokaci, kuma an rage karfin juzu'i. Yana da kyakkyawan lubrication na ciki da na waje. Zai iya inganta rarrabuwa na launin launi, ba da samfurori mai kyau mai kyau da kuma inganta haɓakar samarwa.

Mummunan sakamako na ƙaura da janyewar filastik
1. Lokacin da ƙaura da hakar filastik a cikin PVC suna da tsanani, samfuran za su canza sosai, haifar da laushi, tackiness har ma da fashewar samfuran. Hazo yakan haifar da gurɓataccen samfur kuma yana shafar sarrafa samfuran na biyu. Alal misali, ƙwayoyin filastik a cikin kayan da aka nannade ruwa na PVC suna ƙaura, kuma PVC ba tare da filastik ba za su ragu kuma su yi tauri, wanda zai iya haifar da gazawar aikin hana ruwa. Lokacin da aka liƙa samfuran PVC masu laushi tare da manne na tushen ƙarfi gabaɗaya, filastik a cikin samfuran galibi zai yi ƙaura zuwa layin haɗin gwiwa, yana haifar da raguwar ƙarfin haɗin gwiwa, yana haifar da matsaloli kamar haɗin gwiwa mai rauni ko raguwa. Lokacin da aka shafe ko fenti masu laushi na PVC, suna fuskantar matsalar faɗuwa da fenti ko fenti saboda hakar filastik. Buga PVC, hakar plasticizer babban haramun ne a cikin tawada da masana'antar masana'antar bugu.
2, A cikin aiwatar da hazo mai filastik a cikin PVC, za a fitar da wasu abubuwa, kamar granules pigment, daɗin ɗanɗano, wakilai na antistatic da stabilizers. Saboda asarar waɗannan abubuwan haɗin gwiwa, abubuwan da ke cikin jiki na samfuran PVC za su ragu, kuma wasu kaddarorin ma za su ɓace. Wadannan hazo kuma za su gurɓata da lalata abubuwan da ke kusa da su. Idan an haɗa samfuran PVC masu laushi da samfuran polystyrene, filastik da aka yi hijira daga PVC zai shafi aikin samfuran polystyrene kuma yana haifar da laushin samfuran polystyrene.
Siffar asarar
Plasticizers, ban da polyester da sauran manyan nau'ikan filastik masu nauyi, ƙananan ƙwayoyin ƙwayoyin cuta ne. Lokacin da aka ƙara su zuwa PVC, ba a sanya su a kan sarkar polymer na PVC ba, amma an haɗa su da kwayoyin PVC ta hanyar haɗin hydrogen ko van der Waals da karfi don riƙe kaddarorin sinadarai masu zaman kansu.
Lokacin da PVC mai laushi yana hulɗa da matsakaicin matsakaici (lokacin iskar gas, lokaci na ruwa da lokaci mai ƙarfi) na dogon lokaci, za a warware matsalar filastik a hankali daga PVC kuma a shigar da matsakaici. Bisa ga daban-daban kafofin watsa labarai lamba, asarar siffofin plasticizer za a iya raba zuwa volatilization asarar, hakar asarar da ƙaura.
Tsarin asarar na'ura na filastik, cirewa da ƙaura ya haɗa da matakai na asali guda uku:
(1) Plasticizer yana yaduwa zuwa cikin ciki;
(2) Fuskokin ciki yana canzawa zuwa yanayin "madaidaici";
(3) Watse daga sama.

Asarar plasticizer yana da alaƙa da tsarin tsarin kansa, nauyin kwayoyin halitta, dacewa da polymer, matsakaici, yanayi da sauran dalilai. A volatilization na plasticizer yafi dogara da ta kwayoyin nauyi da na yanayi zafin jiki, da extractability yafi dogara a kan solubility na plasticizer a cikin matsakaici, da kuma motsi na kusa da alaka da karfinsu na plasticizer da PVC. Ana iya aiwatar da yaduwar filastik a cikin PVC a ƙarƙashin yanayin polymer da matsakaici wanda ba zai shiga cikin polymer ba, ko kuma a ƙarƙashin yanayin matsakaici wanda zai shiga cikin polymer. Canje-canje daban-daban da halayen saman polymer zai shafi yaduwar filastik. Tsarin tsaka-tsakin tsaka-tsakin filastik shine tsari mai rikitarwa, wanda ke da alaƙa da hulɗar matsakaici, polymer PVC da filastik.
Abubuwan da ke da tasiri na ƙaura da kuma cirewar filastik
1. Dangantakar nauyin kwayoyin halitta da tsarin kwayoyin halitta na plasticizer
Mafi girman girman nauyin kwayoyin halitta na plasticizer, mafi girma girma na ƙungiyoyin da ke cikin kwayoyin halitta, da wuya ya kasance a gare su don yadawa a cikin PVC filastik. da ƙarancin isa ga sararin sama, kuma rage yiwuwar hakowa da ƙaura. Don da kyau karko, shi ne cewa wajibi ne da dangi kwayoyin nauyi na plasticizer ne fiye da 350. Polyesters da phenylpolyacid esters (kamar trimellitic acid esters) plasticizers tare da dangi kwayoyin nauyi na fiye da 1000 da kyau karko.
2. Yanayin zafin jiki
Mafi girman yanayin yanayi na samfuran PVC, mafi girman motsin motsi na Brownian, kuma mafi girman ƙarfi tsakanin ƙwayoyin filastik da macromolecules na PVC, wanda ya sa ya fi sauƙi ga ƙwayoyin filastik don yadawa zuwa farfajiyar samfurin kuma gaba zuwa cikin samfurin. matsakaicin.
3. Abubuwan
da ke cikin filastik Gabaɗaya, mafi girman abun ciki na kayan aikin filastik a cikin dabarar, yawancin ƙwayoyin filastik a cikin PVC mai filastik da ƙarin ƙwayoyin filastik akan saman samfurin. A mafi sauƙi ana kama filastik ta hanyar sadarwa ta hanyar sadarwa kuma ana fitar da su ko yin ƙaura, sannan kuma ƙwayoyin filastik na ciki suna gudana da kari daga babban taro zuwa ƙasa mai zurfi. A lokaci guda kuma, mafi ƙanƙanta da matsakaita masu girma dabam a cikin PVC, mafi girman yuwuwar wasu karo da aiki tsakanin ƙwayoyin filastik, don raunana ƙarfin dauri tsakanin wasu ƙwayoyin filastik da macromolecules na PVC da yin motsinsu da yaduwa a cikin su. PVC mai sauƙi. Sabili da haka, a cikin takamaiman kewayon, haɓaka abun ciki na filastik yana sa mai yin filastik ya fi sauƙi don yaduwa.
4. Matsakaicin
hakar da ƙaura na filastik ba kawai suna da alaƙa da kaddarorin filastik da kanta ba, har ma suna da alaƙa da alaƙa da matsakaici a lamba. Abubuwan physicochemical na matsakaicin ruwa a cikin hulɗa tare da PVC mai filastik sune manyan abubuwan da ke shafar hakar filastik. Abubuwan robobi na yau da kullun suna da sauƙi a hako su ta hanyar man fetur ko sauran abubuwan mai, amma da wahala a hako su da ruwa.
5. Lokaci
Bisa ga wallafe-wallafen, yawan ƙaura na DOP a cikin fim din PVC yana da alaka da lokaci. A matakin farko na ƙaura, ƙimar yana da sauri. Matsakaicin ƙaura na plasticizer yana ƙaura zuwa sama yana da layi tare da tushen murabba'in lokacin ƙaura. Sannan, tare da tsawaita lokaci, ƙaura a hankali yana raguwa kuma ya kai ga daidaito bayan wani ɗan lokaci (720h hagu da dama).

Matakan don magance hazo da ƙaura na PVC plasticizer
1. Ƙara polyester plasticizer
Polyester plasticizer yana da dangantaka mai kyau tare da DOP da sauran ƙananan ƙwayoyin ƙwayoyin cuta. Lokacin da akwai wani adadin polyester plasticizer a cikin PVC plasticizer, zai iya jawo hankali da kuma gyara wasu robobi don kada su yada zuwa saman kayayyakin PVC, don rage da kuma hana ƙaura da kuma hakar na roba.
2. Ƙara nanoparticles
Ƙarin nanoparticles zai iya rage yawan asarar motsi a cikin PVC mai laushi da inganta aikin sabis da rayuwar sabis na kayan PVC mai laushi. Ikon nanoparticles daban-daban don hana ƙaura na plasticizer ya bambanta, kuma tasirin nano SiO2 ya fi na nano CaCO3.

3. Yi amfani da ruwa mai ion

Ruwan Ionic na iya sarrafa zafin canjin gilashin na polymer a cikin babban kewayon zafin jiki. Modules na roba na kayan da aka ƙara tare da ruwa na ionic yayi daidai da lokacin da ake amfani da DOP azaman filastik. Ruwan Ionic shine ingantaccen madadin filastik saboda ƙarancin ƙarancinsa a babban zafin jiki, ƙarancin leachability da ingantaccen kwanciyar hankali UV.
4. Surface spraying m shafi
Rufe wani Layer na da ba ƙaura abu a kan polymer surface don rage leaching da ƙaura na plasticizer. Rashin lahani na wannan hanya shine cewa zai iya rage sassaucin kayan aiki. Duk da haka, gwaje-gwajen sun nuna cewa wannan fasaha mai laushi na iya hana leaching na plasticizer yadda ya kamata kuma yana da fa'ida mai fa'ida a fagen aikin PVC.
5. Daidaitawar
saman A cikin ruwa tare da mai haɓaka lokacin canja wuri mai dacewa, an gyara saman filastik tare da sodium sulfide. A karkashin aikin haske, saman samfuran PVC ya samar da tsarin hanyar sadarwa, wanda zai iya hana ƙaura na filastik. PVC mai laushi da aka bi da wannan hanya ya dace sosai don aikace-aikace a cikin kayan aikin likita da kayan aiki.
6. Gyaran sararin samaniya
Ana iya sarrafa leaching na filastik a cikin bayani na polymer ta hanyar daidaita yanayin yanayin polymer. Daga cikin fasahohin gyare-gyare da yawa, grafting polymer mai narkewa a saman yana ɗaya daga cikin manyan kwatance.
Ana ba da shawarar cewa dole ne a yi amfani da hanyar grafting PEG akan saman PVC mai laushi don haɓaka hydrophilicity na saman ƙasa, don hana leaching na filastik.
Bugu da kari, ta yin amfani da lokaci canja wurin mai kara kuzari da thiosulfate anion don maye gurbin chlorine atom a cikin PVC a cikin ruwa bayani tsarin iya inganta surface hydrophilicity da kuma hana leaching da canja wurin na plasticizer a daban-daban kaushi kamar hexane.
Kammalawa:
Haɓakawa da ƙaura na filastik yana ɗaya daga cikin mahimman matsalolin aikace-aikacen samfuran PVC masu laushi. Idan ba za a iya warware shi da kyau ba, ba kawai zai shafi aikin sabis da tasirin samfuran PVC mai laushi ba, har ma ya kawo wasu cutarwa ga yanayin rayuwar ɗan adam da lafiyar ɗan adam. Don haka, wannan matsala ta kara daukar hankali.
Qingdao Sainuo Chemical Co., Ltd. Mu ne masana'anta don waxakin PE, waxakin PP, waxakin OPE, Eva kakin zuma, PEMA, EBS, Zinc / Calcium Stearate …. Kayayyakin mu sun wuce REACH, ROHS, PAHS, gwajin FDA. Sainuo rest assured wax, maraba da tambayar ku! Yanar Gizo:https://www.sanowax.com
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