Nhazi ntụaka nke PVC maka ire ọkụ
Nhazi na imeziwanye usoro nhazi ihe eji egbochi ọkụ PVC, nke gụnyere ihe ndị na-egbochi ọkụ dị ugbu a na ihe ndị dị mkpa na-arụkọ ọrụ, na-elekwasị anya na ihe ndị na-egbochi ọkụ UL94 V0 (enwere ike ịgbanwe ya ka ọ bụrụ V2 site na ibelata ọnụọgụ mgbakwunye).
I. Nkwanye Ụkpụrụ Ntọala (PVC siri ike)
Usoro ihe eji egbochi ire ọkụ plastik:
| Akụkụ | Na-ebugo (wt%) | Nkọwa Ọrụ |
|---|---|---|
| Resin PVC (ụdị SG-5) | 40-50% | Ihe matrix, ọkachasị ọkwa mmịpụta mmanụ dị ala |
| Aluminom hypophosphite | 12-15% | Isi iyi acid maka imepụta char, na-egbochi ìhè anyanwụ mgbe ọ gbasịrị |
| Zinc borate | 8-10% | Mmechi anwụrụ ọkụ na-emekọ ihe ọnụ, na-emeghachi omume na HCl site na mmebi PVC |
| Aluminom hydroxide emezigharịrị n'elu | Pasentị 10-12 | Oyi oyi nke endothermic, chọrọ mkpuchi ihe njikọ silane (oyi nke ire ere dakọtara na nhazi PVC) |
| Antimony trioxide (Sb₂O₃) | 3-5% | Onye na-eme ka ihe dị n'ime ya dịkwuo mma, na-eme ka ire ọkụ ghara ịdị irè site na njikọta Cl-Sb |
| Zinc molybdate (ihe na-ebelata anwụrụ ọkụ) | 5-8% | Ihe mgbakwunye akwadoro, na-ebelata njupụta anwụrụ ọkụ (isi ihe dị mkpa maka nnabata DIN 4102) |
| Dipentaerythritol (DPE) | 2-3% | Enyemaka na-eme ka Char-forming dịkwuo mma, na-eme ka njikwa mgbaze na ntapu dị mma |
| ihe na-eme ka okpomọkụ sie ike (ihe mejupụtara Ca-Zn) | 3-4% | Dị mkpa iji gbochie mmebi okpomọkụ n'oge nhazi |
| Plasticizer (DOP ma ọ bụ ihe ọzọ gburugburu ebe obibi) | 0-8% | Gbanwee maka ike siri ike (nhọrọ maka PVC siri ike) |
| Mmanụ mmanu (calcium stearate) | 1-1.5% | Ọ na-eme ka usoro nhazi ka mma, na-egbochi ịpịkọta ihe na-agbagharị agbagharị |
| Enyemaka nhazi (ACR) | 1-2% | Na-eme ka mgbasa nke plastik na nhazi ukwu dịkwuo mma |
II. Ụkpụrụ Nhazi Isi
- Sistemụ Mmekọrịta Na-egbochi Ọkụ
- Njikọta Cl-Sb: Chlorine nke PVC (56%) jikọtara ya na 3-5% Sb₂O₃ na-emepụta ihe mgbochi SbCl₃, na-eme ka ọ ghara ịdị irè n'ọkụ nke gas-phase/condensed-phase dual-action.
- Mgbochi Anwụrụ: Zinc molybdate + zinc borate na-ebelata njupụta anwụrụ ọkụ site na >40% (ASTM E662).
- Mmezi Char: Aluminom hypophosphite + DPE na-emepụta phosphoric ester chara acha na 200–250°C, na-akwụghachi ụgwọ maka enweghị char PVC n'oge mbụ.
- Nhazi Mgbanwe
- Ndakọrịta Okpomọkụ: Aluminom hypophosphite (ire ere ≥250°C) na Al(OH)₃ nke agbanwere n'elu (kwụsiri ike ruo >200°C) dabara na nhazi PVC (160–190°C).
- Nkwanyesi Ike: Ihe ndị na-eme ka Ca-Zn sie ike na-egbochi mmebi resin site na mwepụta HCl; ACR na-enyere aka ime ka plastik dị na sistemụ ihe na-ejupụta nke ọma.
- Nhazi Arụmọrụ
- Mkpokọta ibu ihe na-egbochi ire ọkụ: 35–45%, njigide ike nrụgide ≥80% (ihe a na-ahụkarị ≥40 MPa maka PVC siri ike).
- Maka mgbanwe (PVC na-agbanwe agbanwe), jiri mmanụ soybean epoxidized 8% (mmanụ plastik/ihe na-egbochi ire ọkụ abụọ) dochie DOP.
III. Nnwale na Nnwale Nyocha
Nkwụsị ire ọkụ:
- UL94 V0 (ọkpụrụkpụ 1.6 mm)
- Ịmachi Ndekọ Oxygen (LOI) ≥32%
Njikwa Anwụrụ Anwụrụ:
- Nnwale ụlọ anwụrụ ọkụ NBS: Oke njupụta anya pụrụ icheDs≤150 (ụdị ọkụ)
Njirimara Mechanical:
- Ike nrụgide ≥35 MPa (siri ike), ịgbatị oge mgbe ezumike ≥200% (na-agbanwe agbanwe)
Ịkwụsi Ike nke Okpomọkụ:
- DMA na-akwado na ọ dịghị mgbanwe modulus na 180°C.
IV. Mgbanwe Ọnụ ego na Enyi na Ewu
Nhọrọ dị ọnụ ala:
- Belata zinc molybdate ruo 3%, jiri Mg(OH)₂ dochie Al(OH)₃ nke ọma (mee ka ọ dị 15%).
Ngwọta Na-enweghị Antimony:
- Wepụ Sb₂O₃, jiri 2% aluminom diethylphosphinate + 5% nano-kaolin (arụmọrụ ya dị obere; ọ chọrọ ọkpụrụkpụ 3 mm maka V0).
Ihe Kachasị Mkpa nke Anwụrụ Anwụrụ:
- Tinye 1% nke silicone resin nke e ji carbon ojii kpuchie iji belata njupụta anwụrụ ọkụ site na 15%.
V. Ntuziaka Nhazi
- Usoro Ngwakọta:
Resin PVC → ihe na-eme ka ihe sie ike + mmanụ → ihe na-egbochi ire ọkụ (njupụta dị ala ruo elu) → ihe na-eme ka plastik dị (a na-etinye ihe na-agbaze agbaze ikpeazụ). - Okpomọkụ nhazi:
Mpaghara ihe eji eme ihe eji eme ihe eji eme ihe eji eme ihe eji eme ihe eji eme ihe eji eme ihe eji eme ihe eji eme ihe: 160°C (nri) → 170°C (agbaze) → 180°C (ngwakọta) → 175°C (isi ihe eji eme ihe). - Ntinye Uche nke Masterbatch:
A na-atụ aro ka e tinye ya na 50%; jiri PVC dị ọcha gwakọta ya na 1:1 maka ịkpụzi ya n'ọgwụgwụ.
Usoro a na-eme ka ike ire ọkụ dị elu, obere anwụrụ ọkụ, na nkwụsi ike nhazi dị mma. A na-adụ ọdụ ka e jiri obere nnwale mee ihe tupu e mee ka ọ dị elu, yana mgbanwe dabere na ụdị ngwaahịa (mpempe akwụkwọ, eriri, wdg).
More info., pls contact lucy@taifeng-fr.com
Oge ozi: Julaị-08-2025
