Kugadzirwa kweTPU Coating System isina Halogen-Free Flame Retardant uchishandisa DMF Solvent
Kune masisitimu ekuputira eTPU anoshandisa Dimethyl Formamide (DMF) semushonga, kushandiswa kwealuminium hypophosphite (AHP) uye zinc borate (ZB) sezvinodzivirira moto kunoda kuongororwa kwakarongeka. Pazasi pane ongororo yakadzama uye hurongwa hwekushandisa:
I. Kuongorora Kugoneka kweAluminium Hypophosphite (AHP)
1. Maitiro Ekudzivirira Murazvo uye Zvakanakira
- Maitiro:
- Inoora pakupisa kwakanyanya kuti igadzire phosphoric uye metaphosphoric acids, zvichikurudzira kuumbwa kwechar muTPU (condensed-phase flame retardancy).
- Inoburitsa PO· radicals kuti imise kuitika kwekupisa (gas-phase flame retardancy).
- Zvakanakira:
- Haina halogen, utsi hushoma, ine chepfu shoma, inoenderana neRoHS/REACH.
- Kugadzikana kwakanaka kwekupisa (tembiricha yekuora ≈300°C), yakakodzera maitiro ekuomesa eTPU (kazhinji <150°C).
2. Matambudziko ekushandisa uye Mhinduro
| Dambudziko | Mhinduro |
| Kupararira kusina kunaka muDMF | Shandisa AHP yakagadziriswa pamusoro (semuenzaniso, silane coupling agent KH-550). Maitiro ekuparadzira zvinhu usati watanga: Ball-mill AHP ine DMF uye dispersant (semuenzaniso, BYK-110) kusvika pahukuru hwe particle <5μm. |
| Kudiwa kwekurodha kwakanyanya (20-30%) | Kusanganiswa kweZB kana melamine cyanurate (MCA) kuderedza mutoro wezvinhu kusvika pa15-20%. |
| Kuderedzwa kwekupfeka pachena | Shandisa AHP yakakura-diki (saizi yezvikamu <1μm) kana kusanganisa nezvinhu zvinodzora moto zvinoonekera (semuenzaniso, organic phosphates). |
3. Kugadzirwa uye Maitiro Anokurudzirwa
- Muenzaniso weKuumbwa:
- Hwaro hweTPU/DMF: 100 phr
- AHP yakagadziridzwa pamusoro: 20 phr
- Zinc borate (ZB): 5 phr (kubatana kwekudzora utsi)
- Muparadziri (BYK-110): 1.5 phr
- Pfungwa huru dzeMaitiro:
- Sanganisa AHP ne dispersant uye chikamu cheDMF pasi pekuchekwa kwakanyanya (≥3000 rpm, 30 min), wozosanganisa neTPU slurry.
- Kuomesa mushure mekuputira: 120-150°C, wedzera nguva ne10% kuti uve nechokwadi chekuti DMF yapera zvachose.
II. Kuongorora Kugona Kwekuita kweZinc Borate (ZB)
1. Maitiro Ekudzivirira Murazvo uye Zvakanakira
- Maitiro:
- Inogadzira girazi reB₂O₃ pakupisa kwakanyanya, ichivhara okisijeni nekupisa (condensed-phase flame retardancy).
- Inoburitsa mvura yakasungwa (~13%), ichideredza magasi anobvira uye inotonhodza sisitimu.
- Zvakanakira:
- Simba guru rekubatana pamwe chete neAHP kana aluminium trihydroxide (ATH).
- Kubvisa utsi kwakanyanya, kwakanakira kushandiswa kweutsi hushoma.
2. Matambudziko ekushandisa uye Mhinduro
| Dambudziko | Mhinduro |
| Kusagadzikana kwekupararira kwakashata | Shandisai ZB (<500nm) yakakura ne nano-size uye zvinonyorovesa (semuenzaniso, TegoDispers 750W). |
| Kushanda zvishoma kunodzora moto (kunodiwa kurodha kwakawanda) | Shandisa senzira yekubatsirana (5-10%) nemidziyo inodzivisa moto (semuenzaniso, AHP kana organic phosphorus). |
| Kuderedzwa kwekuchinjika kwekuputira | Ripai ne plasticizers (semuenzaniso, DOP kana polyester polyols). |
3. Kugadzirwa uye Maitiro Anokurudzirwa
- Muenzaniso weKuumbwa:
- Hwaro hweTPU/DMF: 100 phr
- ZB yehukuru hweNano: 8 phr
- AHP: 15 phr
- Wetting agent (Tego 750W): 1 phr
- Pfungwa huru dzeMaitiro:
- Paradzira ZB muDMF uchishandisa bead milling (saizi yezvikamu ≤2μm) usati wasanganisa neTPU slurry.
- Wedzera nguva yekuomesa (semuenzaniso, maminetsi makumi matatu) kudzivirira hunyoro hunoramba huripo huchikanganisa kunonoka kwemoto.
III. Kuongororwa kweAHP + ZB System pamwe chete
1. Migumisiro Inodzivirira Moto Inobatanidza Kupisa
- Kubatana kweGasi-Phase & Chikamu Chakavharidzirwa:
- AHP inopa phosphorus yekupisa, nepo ZB ichidzikamisa jira rechar uye ichidzivirira kubwinya kweafterglow.
- LOI yakabatana: 28-30%, UL94 V-0 (1.6mm) inogoneka.
- Kuderedza Utsi:
- ZB inoderedza kuburitswa kweutsi ne >50% (Cone Calorimeter test).
2. Mazano ekuenzanisa mashandiro
- Muripo weZvivakwa zveMakanika:
- Wedzera 2-3% TPU plasticizer (semuenzaniso, polycaprolactone polyol) kuti urambe uchichinjika (refu >300%).
- Shandisa hupfu hwakatsetseka (AHP/ZB <2μm) kuderedza kurasikirwa nesimba rekusimba.
- Kudzora Kugadzikana Kwemaitiro:
- Chengetedza slurry viscosity pa2000-4000 cP (Brookfield RV, spindle 4, 20 rpm) kuti ifukidzwe zvakaenzana.
IV. Kuenzanisa nezvinhu zvinodzivirira moto zvinonyunguduka
| Paramita | Sisitimu yeAHP + ZB | Liquid Phosphorus-Nitrogen FR (semuenzaniso, Levagard 4090N) |
| Kurodha | 20-30% | 15-25% |
| Dambudziko rekupararira | Zvinoda kurapwa kusati kwaitwa (kugadziriswa kwepamusoro-soro/pamusoro pechinhu) | Kunyungudika kwakananga, hapana kupararira kunodiwa |
| Mutengo | Yakaderera (~$3-5/kg) | Yakakwira (~$10-15/kg) |
| Kukanganiswa Kwezvakatipoteredza | Hapana halogen, chepfu shoma | Inogona kunge iine ma halogen (zvinoenderana nezvigadzirwa) |
| Kupfeka Kujeka | Inochinja zvishoma kusvika painopenya | Inoonekera zvakanyanya |
V. Matanho Ekushandisa Anokurudzirwa
- Kuedzwa kweLab-Scale:
- Ongorora AHP/ZB imwe neimwe uye pamwe chete (gradient loading: 10%, 15%, 20%).
- Ongorora kugadzikana kwekupararira (hapana kudonha kwemvura mushure memaawa makumi maviri nemana), kuchinja kwehunhu hwemvura, uye kufanana kwehunhu hwepurasitiki.
- Kusimbiswa kweChikero chemutyairi:
- Gadzirisa mamiriro ekuomesa (nguva/tembiricha) uye edza kunonoka kwemurazvo (UL94, LOI) uye hunhu hwemakanika.
- Enzanisa mitengo: Kana AHP+ZB ikaderedza mitengo ne >30% zvichienzaniswa ne liquid FRs, zvinobudirira pahupfumi.
- Kugadzirira Kuwedzera Kukura:
- Shanda pamwe chete nevatengesi kuti mugadzire maAHP/ZB masterbatches akaparadzirwa kare (akavakirwa paDMF) kuti zvive nyore kugadzira.
VI. Mhedziso
Nekupararira kwakarongwa, AHP neZB zvinogona kushanda sezvinodzivirira moto zvinobudirira pakuvhara TPU/DMF, chero bedzi:
- Kugadziriswa kwepamusoro + kupararira kwakanyanyainoshandiswa kudzivirira kuungana kwezvikamu.
- AHP (yekutanga) + ZB (synergist)zvinoenzanisa kushanda zvakanaka uye mutengo.
- Zvekujeka/kuchinjika kwakanyanyaKana paine zvinodiwa, phosphorus-nitrogen FRs yemvura (semuenzaniso, Levagard 4090N) inoramba iri nani.
Sichuan Taifeng New Flame Retardant Co., Ltd. (ISO & REACH)
Email: lucy@taifeng-fr.com
Nguva yekutumira: Chivabvu-22-2025
