Umthelela Wezinzinzisi Zokushisa Emikhiqizweni ye-PVC: Ukumelana Nokushisa, Ukucutshungulwa, Ukungafihli

Leli phepha lihlola ukuthi izinzisi zokushisa ziyithinta kanjani imikhiqizo ye-PVC, igxileukumelana nokushisa, ukucutshungulwa, nokuba sobala. Ngokuhlaziya izincwadi nedatha yokuhlola, sihlola ukusebenzisana phakathi kwezinzinzisi nenhlaka ye-PVC, nokuthi zikulolonga kanjani ukuqina kwe-thermal, ukwenza lula, kanye nezakhiwo zokubona.

1. Isingeniso

I-PVC iyi-thermoplastic esetshenziswa kakhulu, kepha ukuntengantenga kwayo kukhawulela ukucubungula.Izinzisi zokushisayehlisa ukuwohloka emazingeni okushisa aphezulu futhi iphinde ibe nomthelela ekusebenzeni nasekukhanyeni—okubalulekile ezinhlelweni ezifana nokupakishwa namafilimu ezakhiwo.

2. Ukumelana Nokushisa Kwama-Stabilizers ku-PVC

2.1 Izindlela Zokusimama

Ama-stabilizer ahlukene (asuselwa kumthofu,i-calcium - zinc, organotin) sebenzisa izindlela ezihlukene:

Ukuhola - okusekelwe: Isabela nge-labile Cl athomu kumaketanga e-PVC ukuze kwakheke izakhiwo ezizinzile, kuvimbele ukuwohloka.
I-calcium - zinc: Hlanganisa i-asidi - ebophayo ne-radical - scavenging.
I-Organotin (i-methyl/butyl ithini): Hlanganisa namaketanga e-polymer ukuvimbela i-dehydrochlorination, ukucindezela ngempumelelo ukuwohloka.

2.2 Ukuhlola Ukuzinza Kwe-Thermal

Ukuhlolwa kwe-Thermogravimetric analysis (TGA) kukhombisa i-organotin - i-PVC ezinzile inamazinga okushisa okuqalisa aphezulu kunezinhlelo ze-calcium - zinc evamile. Nakuba izinzinzisi ezisekelwe kumthofu zinikeza ukuzinza kwesikhathi eside kwezinye izinqubo, ukukhathazeka kwemvelo/kwezempilo kuvimbela ukusetshenziswa.

3. Imiphumela Yokucutshungulwa

3.1 I-Melt Flow & Viscosity

Izinza zishintsha indlela yokuncibilika kwe-PVC:

I-calcium - zinc: Ingase yandise ukuncibilika kwe-viscosity, ivimbele ukubunjwa kwe-extrusion/umjovo.
I-Organotin: Nciphisa i-viscosity ukuze kube bushelelezi, okuphansi - ukucutshungulwa kwezinga lokushisa—okulungele imigqa yejubane eliphezulu.
Ukuhola - okusekelwe: Ukuncibilika okumaphakathi kodwa amawindi okucubungula amancane ngenxa yezingozi zepuleti.

3.2 Ukugcotshwa kanye Nokukhishwa Kwesikhunta

Amanye ama-stabilizer asebenza njengama-lubricant:

I-calcium - ukwakheka kwe-zinc kuvame ukufaka izithambisi zangaphakathi ukuze kuthuthukiswe ukukhululwa kwesikhunta ekubumbeni umjovo.
I-Organotin stabilizers ithuthukisa i-PVC - ukuhambisana okungeziwe, ukusiza ngokungaqondile ukuqhubekela phambili.

4. Umthelela Ekukhanyeni

4.1 Ukusebenzisana nesakhiwo se-PVC

Ukubonisa ngale kuncike ekuhlakazweni kwesizinzi ku-PVC:

Okuhle - okuhlakazekile, okuncane - izinhlayiya ze-calcium - izinzile ze-zinc zinciphisa ukuhlakazeka kokukhanya, zigcina ukucaca.
I-Organotin stabilizershlanganisa kumaketanga e-PVC, wehlise ukuhlanekezelwa kokubona.
Ama-stabilizer asekelwe ngomthofu (izinhlayiya ezinkulu, ezisatshalaliswa ngokungalingani) abangela ukuhlakazeka kokukhanya okunzima, ukwehlisa ukukhanya.

4.2 Izinhlobo Zokuzinzisa Nokungafihli

Izifundo zokuqhathanisa zibonisa:

I-Organotin - amafilimu e-PVC azinzile afinyelela > 90% wokudlulisa ukukhanya.
Calcium - zinc stabilizers isivuno ~ 85-88% transmittance.
Izinzinzisi ezisekelwe kumthofu zisebenza kabi kakhulu.

Amaphutha afana “namehlo ezinhlanzi” (ahlanganiswe nekhwalithi yokuzinzisa/ukusabalalisa) nawo anciphisa ukucaca—izinzinzisi zekhwalithi ephezulu zinciphisa lezi zinkinga.

5. Isiphetho

Izizinzisi zokushisa zibalulekile ekucubunguleni i-PVC, ukwakha ukumelana nokushisa, ukucutshungulwa, kanye nokungafihli:

Ukuhola - okusekelwe: Nikeza ukuzinza kodwa ubhekane nokuhlehla kwemvelo.
I-calcium - zinc: I-Eco – enobungani kodwa idinga ukuthuthukiswa kokucutshungulwa/okusobala.
I-Organotin: I-Excel kuzo zonke izici kodwa ibhekane nezindleko/izithiyo zokulawula kwezinye izifunda.

Ucwaningo lwangomuso kufanele luthuthukise izinza ezilinganisa ukusimama, ukusebenza kahle kokucubungula, kanye nekhwalithi yokubona ukuze kuhlangatshezwane nezidingo zemboni.