Iimpembelelo zokuZinzisa uBushushu kwiiMveliso zePVC: Ukuxhathisa ubushushu, ukuqhubekeka, ukuNgafihli

Eli phepha liphonononga indlela izinzisi zobushushu ezichaphazela ngayo iimveliso zePVC, zigxileukumelana nobushushu, ukuqhubekeka, kunye nokungafihli. Ngokuhlalutya uncwadi kunye nedatha yovavanyo, sivavanya ukusebenzisana phakathi kwezinzisi kunye ne-PVC resin, kunye nendlela ezenza ngayo ukuzinza kwe-thermal, ukwenza lula, kunye neepropati ezibonakalayo.

1. Intshayelelo

I-PVC yi-thermoplastic esetyenziswa ngokubanzi, kodwa ukungazinzi kwayo kwe-thermal kunciphisa ukusetyenzwa.Izinzisi zobushushuNciphisa ukuthotywa kwiqondo lobushushu eliphezulu kunye nefuthe lokuqhubekeka kunye nokungafihli-kubalulekile kwizicelo ezinje ngokupakishwa kunye neefilimu zoyilo.

2. Ukunyangwa kobushushu kwii-Stabilizers kwi-PVC

2.1 IiNdlela zokuZinzisa

Izinzinzi ezohlukeneyo (ezisekelwe kwilothe,calcium - zinc, organotin) sebenzisa iindlela ezahlukeneyo:

Inkokeli - isekelwe: Ukuphendula nge-athomu ye-labile Cl kwimixokelelwane ye-PVC ukwenza ii-complexes ezizinzileyo, ukuthintela ukuthotywa.
I-calcium - i-zinc: Hlanganisa i-asidi - ukubopha kunye ne-radical - ukukhupha.
I-Organotini-methyl/butyl toti): Ukulungelelanisa kunye namatyathanga e-polymer ukuvimbela i-dehydrochlorination, ngokufanelekileyo ukucinezela ukuthotywa.

2.2 Ukuvavanya Ukuzinza kweThermal

Uhlalutyo lwe-Thermogravimetric (TGA) lubonisa i-organotin - i-PVC ezinzileyo inexesha eliphezulu lokuthotywa kwe-degradation kune-calcium yendabuko - iinkqubo ze-zinc. Ngelixa izinzisi ezisekelwe kwilothe zinika uzinzo lwexesha elide kwezinye iinkqubo, iinkxalabo zokusingqongileyo/zempilo zithintela ukusetyenziswa.

3. Iimpembelelo zeProcessability

3.1 I-Melt Flow & Viscosity

Izinzisi ziyayitshintsha indlela yokunyibilika kwePVC:

I-calcium - i-zinc: Inokunyusa i-viscosity enyibilikayo, ithintele i-extrusion / i-injection molding.
I-Organotin: Nciphisa i-viscosity ukuze ihambe kakuhle, iphantsi - i-temp processing-efanelekileyo kwimigca yesantya esiphezulu.
Inkokeli - isekelwe: Ukuhamba okuphakathi kokunyibilika kodwa iifestile zokucutshungulwa zicuthene ngenxa yepleyiti – imingcipheko engaphandle.

3.2 Ukuthambisa kunye nokukhutshwa komngundo

Ezinye izizinzi zisebenza njengezithambiso:

I-calcium - i-zinc formulations idla ngokubandakanya izithambiso zangaphakathi zokuphucula ukukhutshwa kwe-mold kwi-injection molding.
I-Organotin stabilizers yongeza i-PVC - ukuhambelana okongeziweyo, kunceda ngokungathanga ngqo ukuqhubekeka.

4. Impembelelo ekuhleni

4.1 Intsebenziswano kunye neSakhiwo sePVC

Ukungafihlisi kuxhomekeke kwi-stabilizer dispersion kwiPVC:

Kulungile-ihlakazekile, encinci - i-particle calcium - i-zinc stabilizers inciphisa ukukhanya kokukhanya, igcina ukucaca.
I-Organotin stabilizersukudibanisa kumatyathanga e-PVC, ukunciphisa ukuphazamiseka kwamehlo.
I-Lead-based stabilizers (inkulu, i-particle engasasazwanga ngokulinganayo) ibangela ukusabalalisa ukukhanya okunzima, ukunciphisa ukucaca.

4.2 Iintlobo zokuzinzisa kunye nokungafihli

Izifundo ezithelekisayo zibonisa:

I-Organotin - iifilimu ze-PVC ezizinzile zifikelela> 90% yokuhambisa ukukhanya.
Calcium - zinc stabilizers isivuno ~ 85-88% transmittance.
I-Lead-based stabilizers yenza kakubi.

Iziphene ezifana "namehlo eentlanzi" (ezibophelelwe kumgangatho wokuzinzisa / ukusasazwa) nazo zinciphisa ukucaca-umgangatho ophezulu wokuzinzisa unciphisa le miba.

5. Isiphelo

Izinzisi zobushushu zibalulekile kulungiso lwePVC, ukubunjwa kokumelana nobushushu, ukuqhubekeka, kunye nokungafihli:

Inkokeli - isekelwe: Nikeza uzinzo kodwa ujongane nokubuyela umva kokusingqongileyo.
I-calcium - i-zinc: I-Eco - enobubele ngakumbi kodwa idinga ukuphuculwa kokuqhubekeka / elubala.
I-Organotin: I-Excel kuyo yonke imiba kodwa ijongana neendleko / imiqobo yolawulo kweminye imimandla.

Uphando lwexesha elizayo kufuneka luphuhlise izinzisi ezilungelelanisa uzinzo, ukusebenza kakuhle, kunye nomgangatho wokukhanya ukuhlangabezana neemfuno zeshishini.