Polypropylene (PP) UL94 V0 ndi V2 Flame Retardant Formulants

Polypropylene (PP) UL94 V0 ndi V2 Flame Retardant Formulants

Polypropylene (PP) ndi polima yomwe imagwiritsidwa ntchito kwambiri ndi thermoplastic, koma kuyaka kwake kumalepheretsa kugwiritsidwa ntchito kwake m'magawo ena. Kuti mukwaniritse zofunikira zosiyanasiyana zochepetsera moto (monga UL94 V0 ndi V2 magiredi), zoletsa moto zitha kuphatikizidwa kuti zithandizire kukana kwa lawi la PP. Pansipa pali mawu oyambira atsatanetsatane amitundu ya PP yoletsa malawi a UL94 V0 ndi V2 magiredi, kuphatikiza kusankha koletsa moto, kapangidwe kake, njira zopangira, komanso kuyesa magwiridwe antchito.

1. Chiyambi cha UL94 Flame Retardancy Ratings

UL94 ndi mulingo woyaka moto wopangidwa ndi Underwriters Laboratories (UL) kuti awunike kulimba kwa malawi azinthu zapulasitiki. Zomwe zimachitika kawirikawiri pakuchedwa kwa moto ndi monga:

• V0: Gulu lapamwamba kwambiri loletsa moto, lomwe likufuna kuti zitsanzo zizizimitsa zokha mkati mwa masekondi 10 poyesa kuwotcha koyima popanda kuyatsa thonje ndikudontha.
• V2: Gawo locheperako lamoto, lolola kuti zitsanzo zizizimitsa zokha mkati mwa masekondi 30 poyesa kuwotcha koyima pomwe kulola kudontha komwe kumatha kuyatsa thonje.

2. Kupanga kwa PP kwa Flame-Retardant

PP yoletsa malawi ya V0 imafunikira kukana kwabwino kwa lawi, komwe kumatheka pophatikiza zoziziritsa moto zogwira ntchito kwambiri komanso kukhathamiritsa kapangidwe kake.

2.1 Kusankhidwa kwa Flame Retardant

• Brominated Flame Retardants: Monga decabromodiphenyl ether (DBDPO) ndi tetrabromobisphenol A (TBBPA), zomwe zimagwira ntchito bwino kwambiri koma zingakhale zochepetsetsa zachilengedwe.
• Phosphorus-Based Flame Retardants: Monga ammonium polyphosphate (APP) ndi phosphorous wofiira, omwe ndi ochezeka komanso othandiza.
• Ma Intumescent Flame Retardants (IFR): Zokhala ndi gwero la asidi, gwero la kaboni, ndi gwero la gasi, zomwe zimathandiza kuti zisawonongeke komanso kuchedwa kwamoto.
• Magnesium Hydroxide (Mg(OH)₂) kapena Aluminium Hydroxide (Al(OH)₃): Eco-friendly inorganic flame retardants, koma kuchuluka kwakukulu kumafunika.

2.2 Mapangidwe Okhazikika

• PP Resin: 100phr (ndi kulemera kwake, chimodzimodzi pansipa).
• Intumescent Flame Retardant (IFR)Nthawi: 20-30 mphindi.
• Magnesium HydrooxideNthawi: 10-20 mphindi.
• Anti-Dripping Agent: 0.5–1 phr (mwachitsanzo, polytetrafluoroethylene, PTFE).
• Mafuta: 0.5-1 phr (mwachitsanzo, zinc stearate).
• AntioxidantNthawi: 0.2-0.5 mphindi.

2.3 Njira Zopangira

• Kusakaniza: Sakanizani mofanana PP resin, retardants lawi, ndi zina zowonjezera mu chosakanizira kuthamanga kwambiri.
• Extrusion & Pelletizing: Gwiritsani ntchito mapasa-screw extruder pa 180-220 ° C kuti mupange ma pellets.
• Jekeseni Kumangira: Pangani ma pellets kukhala zitsanzo zoyesera pogwiritsa ntchito makina opangira jakisoni.

2.4 Kuyesa Kuchita

• UL94 Vertical Burn Test: Zitsanzo ziyenera kukwaniritsa zofunikira za V0 (kudzimitsa nokha mkati mwa masekondi 10, osayatsa thonje kuchokera kumadontho).
• Kuyeza Katundu Wamakina: Unikani kulimba kwamphamvu, kulimba kwamphamvu, ndi zina zambiri, kuti muwonetsetse kuti magwiridwe antchito akukwaniritsa zofunikira pakugwiritsa ntchito.

3. V2 Flame-Retardant PP Formulation Design

V2-retardant flame-retardant PP ili ndi zofunikira zochepa zolimbana ndi lawi ndipo imatha kukwaniritsidwa ndikutsegula kocheperako koletsa moto.

3.1 Kusankha Kochotsa Moto

• Brominated Flame Retardants: Monga DBDPO kapena TBBPA, zimangofunika ndalama zochepa kuti mukwaniritse V2.
• Phosphorus-Based Flame Retardants: Monga phosphorous yofiira kapena ma phosphates, omwe amapereka njira zothandizira zachilengedwe.
• Magnesium Hydroxide (Mg(OH)₂) kapena Aluminium Hydroxide (Al(OH)₃): Eco-ochezeka koma amafuna kukweza kwambiri.

3.2 Mapangidwe Okhazikika

• PP Resin:100phr.
• Brominated Flame RetardantNthawi: 5-10 ph.
• Antimony Trioxide (Sb₂O₃): 2–3phr (monga synergist).
• Anti-Dripping Agent: 0.5–1 phr (mwachitsanzo, PTFE).
• Mafuta: 0.5-1 phr (mwachitsanzo, zinc stearate).
• AntioxidantNthawi: 0.2-0.5 mphindi.

3.3 Njira Zopangira

• Zofanana ndi kukonza kwa V0-grade (kusakaniza, extrusion, jekeseni akamaumba).

3.4 Kuyesa Kuchita

• UL94 Vertical Burn Test: Zitsanzo ziyenera kukwaniritsa zofunikira za V2 (kudzimitsa nokha mkati mwa masekondi 30, kudontha kuloledwa).
• Kuyeza Katundu Wamakina: Onetsetsani kuti ntchito zakuthupi zikukwaniritsa zosowa za ogwiritsa ntchito.

4. Kufananiza Pakati pa V0 ndi V2 Formulations

4.1 Flame Retardant Loading

• V0 imafuna kukweza kwambiri (mwachitsanzo, 20–30phr IFR kapena 10–20phr Mg(OH)₂).
• V2 imafuna kutsitsa pang'ono (mwachitsanzo, 5-10phr brominated retardants yamoto).

4.2 Kugwira Ntchito Mwachangu kwa Flame

• V0 imapereka kukana kwamoto wapamwamba pazofunikira zolimba.

4.3 Katundu Wamakina

• Mapangidwe a V0 amatha kukhudza kwambiri makina (monga mphamvu yamphamvu, kulimba kwamphamvu) chifukwa chazowonjezera zambiri.
• Mapangidwe a V2 ali ndi mphamvu zochepa pamakina.

4.4 Kusintha kwa chilengedwe

• Mapangidwe a V0 nthawi zambiri amagwiritsa ntchito zoletsa moto (monga IFR, Mg(OH)₂).
• Mapangidwe a V2 atha kugwiritsa ntchito mankhwala oletsa moto a brominated, omwe sakonda zachilengedwe.

5. Malangizo Okonzekera Kukonzekera

5.1 Flame Retardant Synergism

• Kuphatikiza zoletsa moto zosiyanasiyana (mwachitsanzo, IFR + Mg(OH) ₂, brominated + Sb₂O₃) zitha kukulitsa kuchedwa kwa lawi ndikuchepetsa kutsitsa.

5.2 Kusintha kwa Pamwamba

• Kusintha zotsalira zamoto (mwachitsanzo, Mg(OH)₂, Al(OH)₃) zimathandizira kuti zigwirizane ndi PP, kumapangitsanso makina.

5.3 Kukonzekera Kukonzekera

• Kuwongolera magawo a extrusion / jekeseni (kutentha, kuthamanga, kuthamanga kwa screw) kumatsimikizira kubalalitsidwa kwa yunifolomu ndikuletsa kuwonongeka.

6. Mapeto

Mapangidwe a V0 ndi V2 osagwiritsa ntchito flame-retardant PP amatengera zomwe zimafuna kukana lawi lamoto komanso momwe angagwiritsire ntchito.

• Zithunzi za V0nthawi zambiri amagwiritsa ntchito zoletsa moto zamphamvu kwambiri (mwachitsanzo, IFR, Mg(OH) ₂) ndi kulumikizana kokwanira kuti akwaniritse miyezo yokhwima.
• V2 mawonekedweamatha kuchepetsa kuchedwa kwa lawi ndi zowonjezera zochepa (monga brominated flame retardants).

Muzochita zenizeni, zinthu monga kukana lawi lamoto, magwiridwe antchito amakina, kukhudzidwa kwa chilengedwe, ndi mtengo wake ziyenera kukhala zofananira kuti zikwaniritse bwino mapangidwe ndi njira zopangira.

More info., pls contact lucy@taifeng-fr.com