Sebopeho sa referense se thibelang malakabe bakeng sa SK Polyester ES500 (tekanyo ea UL94 V0).
I. Mokhoa oa Moralo oa Tlhahiso
- Ho lumellana ha Substrate
- SK Polyester ES500: Polyester ea thermoplastic e nang le mocheso o tloaelehileng oa ts'ebetso oa 220–260°C. Sethibela-mollo se tlameha ho mamella mocheso ona.
- Litlhoko tsa Bohlokoa: Ho leka-lekanya ho lieha ha lelakabe (V0), litšobotsi tsa mechini (matla a ho tsikinyeha/tšusumetso), le ho phalla ha ts'ebetso.
- Sistimi e Sireletsang Mollo e Kopanetsoeng
- Ultrafine Aluminium Hydroxide (ATH): Sethibela-mafu sa mantlha, ho felloa ke metsi 'meleng. Ho jara ho lokela ho leka-lekanya ho sethibele ha mashudu le litšobotsi tsa mechini.
- Aluminium Hypophosphite: Motsoako o kopanyang Char, o sebetsa le ATH ho theha phello ea phosphorus-aluminium, ho ntlafatsa boleng ba char.
- Zinc Borate: E ntlafatsang mosi, e thibela mosi, mme e etsa mokoallo o teteaneng ka ATH.
- MCA (Melamine Cyanurate): E thibelang lelakabe la kgase, e fokotsa oksijene mme e thibela ho rotha ha metsi a qhibilihang.
II. Tlhahiso e Khothaletsoang (Peresente ea Boima)
| Karolo | Karolelano | Lintlha tsa Ts'ebetso |
|---|---|---|
| SK Polyester ES500 | 45–50% | Resin ea motheo; khetha sehlopha sa phallo e phahameng ho buseletsa ho teteana ha filler. |
| ATH e ntle ka ho fetisisa | 25–30% | E fetotsoe holim'a metsi ka sesebelisoa sa ho kopanya sa silane (KH-550), D50 < 3 μm. |
| Hypophosphite ea Aluminium | 10–12% | E hanela mocheso (>300°C), e kopantsoe le ATH mme e eketsoa ka mekhahlelo. |
| Borate ea Zinki | 6–8% | E ekelitsoe le MCA ho qoba tšenyo e kholo ea sebopeho. |
| MCA | 4–5% | Mocheso oa ts'ebetso o ka tlase ho 250°C, ho hasana ka lebelo le tlase. |
| Sehatsetsi | 2–3% | Sefahla-mofuta se lumellanang le polyester (mohlala, BYK-161) + motsoako oa boka ba polyethylene. |
| Moemeli oa ho Kopanya (KH-550) | 1% | E phekola ATH le aluminium hypophosphite esale pele; ho qoelisoa ka ethanol ho lateloe ke ho omisoa. |
| Moemeli ea Thibelang ho Rotha | 0.5–1% | Phofo e nyenyane ea PTFE ho thibela ho qhibilihisa ha mollo. |
| Thuso ea Ts'ebetso | 0.5% | Zinc stearate (ho tlotsa le ho thibela ho khomarela). |
III. Litaolo tsa Ts'ebetso ea Bohlokoa
- Ntlafatso ea ho Hasana
- Pele ho kalafo: Kolobisa ATH le aluminium hypophosphite ka hara tharollo ya ethanol ya 1% KH-550 ka dihora tse 2, ebe o omisa ho 80°C.
- Tatellano ea ho Kopanya:
- Resin ea motheo + sehatsetsi + moemeli oa ho kopanya → Ho kopanya ka lebelo le tlase (500 rpm, metsotso e 5).
- Kenya hypophosphite e fetotsoeng ea ATH/aluminium → Ho cheka ka lebelo le phahameng (2500 rpm, metsotso e 20).
- Kenya zinc borate/MCA/PTFE → Ho kopanya ka lebelo le tlase (800 rpm, metsotso e 10).
- Lisebelisoa: Sesebelisoa sa ho ntša li-screw tse peli (libaka tsa mocheso: sebaka sa ho fepa 200°C, sebaka sa ho qhibiliha 230°C, mocheso oa 220°C).
- Tsamaiso ea Taolo ea Mocheso
- Netefatsa hore mocheso oa ho qhibiliha o < 250°C ho thibela ho bola ha MCA (MCA e bola ho 250–300°C).
- Li-pellet tse pholisang ka metsi ka mor'a ho ntša metsi ho thibela ho falla ha lintho tse thibelang malakabe.
IV. Mokhoa oa ho Kopanela o Sireletsang Mollo
- ATH + Aluminium Hypophosphite
- ATH e monya mocheso mme e ntsha mouoane wa metsi, e qhibilihisa dikhase tse tukang.
- Aluminium hypophosphite e susumetsa sebopeho sa dense char (AlPO₄), e thibela phetiso ea mocheso.
- Borate ea Zinki + MCA
- Zinc borate e etsa mokoallo o kang khalase holim'a mapetso a char.
- MCA e a bola ho lokolla NH₃, e fokotsa oksijene le ho thibela diketso tsa free radical.
- PTFE e Thibelang ho Rotha
- Phofo e nyenyane ea PTFE e etsa marang-rang a khoele, e fokotsang kotsi ea ho hotetsa ha metsi a qhibilihang.
V. Tokiso ea Tshebetso le ho Tharolla Mathata
| Bothata bo Tloaelehileng | Tharollo |
|---|---|
| Ho lieha ha lelakabe ka tlase ho V0 (V1/V2) | Eketsa aluminium hypophosphite ho 12% + MCA ho 5%, kapa eketsa 2% phosphorus e khubelu e kentsoeng ka har'a capsule (e sebelisanang le aluminium hypophosphite). |
| Thepa e fokotsehileng ea mechini | Fokotsa ATH ho 25%, eketsa 5% ea fiber ea khalase (matlafatso) kapa 3% ea maleic anhydride-grafted POE (toughening). |
| Ho se sebetse hantle ha ts'ebetso | Eketsa mosi o hasanyang ho fihlela ho 3%, kapa eketsa boka ba polyethylene ba 0.5% bo tlaase ba MW (ho tlotsa). |
| Ho thunya ha bokaholimo | Ntlafatsa tekanyo ea moemeli oa ho kopanya kapa u fetohele ho moemeli oa ho kopanya oa titanate (NDZ-201) bakeng sa ho kopanya ho betere ha li-interfacial. |
VI. Litekanyo tsa Netefatso
- Teko ea UL94 V0:
- Disampole tsa 1.6 mm le 3.2 mm, nako yohle ya ho tjhesa < 50 sec kamora ho tjhesa habeli, ha ho na ho tjhesa ho rothang.
- LOI: Sepheo ≥30% (ea sebele ≥28%).
- Thepa ea Mekaniki:
- Matla a ho thapolla > 40 MPa, matla a ho thula > 5 kJ/m² (tekanyetso ea ASTM).
- Ho Tsitsisa Thermal (TGA):
- Masalla a Char ho 800°C > 20%, mocheso oa pele oa ho bola ha motsoako > 300°C.
VII. Sebopeho sa Litšupiso sa Mohlala
| Karolo | Dikahare (%) |
|---|---|
| SK Polyester ES500 | 48% |
| Ultrafine ATH (e fetotsoe) | 28% |
| Hypophosphite ea Aluminium | 11% |
| Borate ea Zinki | 7% |
| MCA | 4% |
| Sefahla-mokelikeli sa BYK-161 | 2.5% |
| Moemeli oa ho Kopanya oa KH-550 | 1% |
| Moemeli oa ho Thibela ho Rotha oa PTFE | 0.8% |
| Zinki Stearate | 0.5% |
Sebopeho sena le moralo oa ts'ebetso li finyella ka katleho ho thibela malakabe a UL94 V0 bakeng sa SK Polyester ES500 ha li ntse li leka-lekanya bokhoni ba ho sebetsa le thepa ea mechini. Liteko tse nyane li khothaletsoa ho netefatsa ho hasana pele ho li-ratio tsa ho lokisa (mohlala, ho leka-lekanya aluminium hypophosphite le MCA). Bakeng sa ntlafatso e eketsehileng ea ho thibela malakabe, nahana ka ho eketsa 2% boron nitride nanosheets (BNNS) e le setlatsetso sa ho futhumatsa se tsamaisang mocheso/se thibelang malakabe se sebetsang habeli.
More info., pls contact lucy@taifeng-fr.com
Nako ea poso: Phupu-01-2025
