A na-emepụta plastik PVC site na acetylene gas na hydrogen chloride, wee mee polymerized.Na mmalite 1950s, e mepụtara ya site na acetylene carbide usoro, na na njedebe 1950s, ọ tụgharịrị na ethylene oxidation usoro na zuru ezu akụrụngwa na ọnụ ala;Ka ọ dị ugbu a, a na-emepụta ihe karịrị 80% nke resins PVC n'ụwa site na usoro a.Otú ọ dị, mgbe 2003 gasịrị, n'ihi ọnụ ahịa mmanụ na-arị elu, ọnụ ahịa nke acetylene carbide usoro dị ihe dị ka 10% dị ala karịa nke usoro ethylene oxidation, ya mere, usoro nhazi nke PVC tụgharịrị gaa na acetylene carbide usoro.
A na-emepụta plastik PVC site na mmiri mmiri vinyl chloride monomer (VCM) site na nkwusioru, ude mmiri, nnukwu ma ọ bụ usoro ngwọta.Usoro polymerization nkwusioru bụ ụzọ bụ isi iji mepụta resin PVC na usoro mmepụta tozuru okè, ọrụ dị mfe, ọnụ ahịa mmepụta dị ala, ọtụtụ ụdị ngwaahịa na ngwa ngwa.Ọ bụ ihe dịka 90% nke ihe ọkụkụ PVC ụwa (homopolymer bụkwa ihe dị ka pasent 90 nke mkpokọta PVC zuru ụwa ọnụ).Nke abụọ bụ usoro ude mmiri, nke a na-eji emepụta resin PVC.A na-ebute mmeghachi omume polymerization site na free radicals, na mmeghachi omume okpomọkụ bụ n'ozuzu 40 ~ 70oc.Okpomọkụ mmeghachi omume na ntinye uche nke onye mmalite nwere mmetụta dị ukwuu na ọnụego polymerization na nkesa arọ molekụla nke resin PVC.
Mpịakọta uzommeputa nhọrọ
Usoro nke PVC plastic profaịlụ bụ tumadi esịnede PVC resin na mgbakwunye, nke na-ekewa n'ime: okpomọkụ stabilizer, mmanu mmanu, nhazi modifier, mmetụta modifier, filler, mgbochi ịka nká gị n'ụlọnga, colorant, wdg Tupu emebe PVC usoro, anyị kwesịrị mbụ. ghọta arụmọrụ nke resin PVC na ihe mgbakwunye dị iche iche.
1. Resin ga-abụ pvc-sc5 resin ma ọ bụ pvc-sg4 resin, ya bụ, resin PVC na ogo polymerization nke 1200-1000.
2. A ghaghị ịgbakwunye usoro nkwụsi ike nke okpomọkụ.Họrọ dị ka ezigbo mmepụta chọrọ, ma ṅaa ntị na mmetụta synergistic na mmegide mmegide n'etiti okpomọkụ stabilizers.
3. Ekwesịrị ịgbakwunye ihe mgbanwe mmetụta.Enwere ike ịhọrọ ndị mgbanwe mmetụta CPE na ACR.Dị ka ihe ndị ọzọ dị na usoro na ike plasticizing nke extruder, ihe mgbakwunye bụ akụkụ 8-12.CPE nwere ọnụ ala dị ala na ọtụtụ isi mmalite;ACR nwere nnukwu iguzogide ịka nká na ike fillet.
4. Tinye ego kwesịrị ekwesị n'ime usoro lubrication.Usoro mmanye mmanye nwere ike ibelata ibu nke igwe nhazi ma mee ka ngwaahịa ahụ dị nro, mana oke ga-eme ka ike nke weld fillet belata.
5. Ịgbakwunye nhazi nhazi nwere ike imeziwanye àgwà plasticizing ma melite ọdịdị nke ngwaahịa.N'ozuzu, ACR nhazi modifier na-agbakwunyere na ego nke 1-2 akụkụ.
6. Ịgbakwunye ihe mkpuchi nwere ike ibelata ọnụ ahịa ma mee ka isi ike nke profaịlụ ahụ dịkwuo elu, ma ọ nwere mmetụta dị ukwuu na ike mmetụta dị ala.Ekwesịrị ịgbakwunye carbonate calcium na-arụ ọrụ nke ọma, yana mgbakwunye nke akụkụ 5-15.
7. A ga-agbakwunyere ntakịrị titanium dioxide iji chebe ụzarị ultraviolet.Titanium dioxide kwesịrị ịbụ ụdị rutile, yana mgbakwunye nke akụkụ 4-6.Ọ bụrụ na ọ dị mkpa, ultraviolet absorbers UV-531, uv327, wdg nwere ike ịgbakwunye na-abawanye iguzogide ịka nká nke profaịlụ.
8. Ịgbakwunye blue na fluorescent brightener na ego kwesịrị ekwesị nwere ike ime ka agba nke profaịlụ dịkwuo mma.
9. Ekwesịrị ime ka usoro ahụ dị mfe dị ka o kwere mee, na ihe mgbakwunye mmiri ekwesịghị ịtinye ka o kwere mee.Dị ka ihe achọrọ nke usoro ngwakọta (lee nsogbu ngwakọta), ekwesịrị kewaa usoro ahụ n'ime ihe I, ihe II na ihe III na batches dịka usoro nri si dị, ma kpokọta ya n'otu n'otu.
polymerization nkwusioru apịaji
polymerization nkwusioru na-eme ka otu ụmụ irighiri mmiri dị n'ahụ kwụsịtụrụ n'ime mmiri site na mkpali na-aga n'ihu, a na-eme mmeghachi omume polymerization na obere ụmụ irighiri mmiri monomer.Ọtụtụ mgbe, polymerization nkwusioru bụ polymerization na-adịte aka.
N'ime afọ ndị na-adịbeghị anya, ụlọ ọrụ na-aga n'ihu na-amụ ma melite usoro, polymerizer, ngwaahịa dị iche iche na àgwà nke nkwụsịtụ polymerization usoro nke PVC resin, na mepụtara teknụzụ usoro na njirimara nke ha.Ka ọ dị ugbu a, ụlọ ọrụ Geon (nke bụbu ụlọ ọrụ BF Goodrich), teknụzụ ụlọ ọrụ shinyue na Japan na teknụzụ ụlọ ọrụ EVC na Europe na-ejikarị.Nkà na ụzụ nke ụlọ ọrụ atọ a bụ ihe dị ka 21% nke ikike mmepụta resin PVC ọhụrụ n'ụwa kemgbe 1990.
Oge nzipu: Jul-15-2022