PVC Flame Retardant Masterbatch Reference Formulation
Dhizaini uye optimization yePVC murazvo retardant masterbatch magadzirirwo, achibatanidza aripo emurazvo retardants uye akakosha ekubatanidza zvikamu, kunanga UL94 V0 flame retardancy (inochinjika kuV2 nekudzikisa huwandu hwekuwedzera).
I. Base Formula Recommendation (Rigid PVC)
Plastic Flame Retardant Formulation:
| Chikamu | Kurodha (wt%) | Tsanangudzo Yebasa |
|---|---|---|
| PVC resin (SG-5 mhando) | 40-50% | Matrix zvinhu, zviri nani yakaderera mafuta-absorption giredhi |
| Aluminium hypophosphite | 12-15% | Asidhi sosi yekugadzira char, inodzvanya kupenya |
| Zinc borate | 8-10% | Synergistic utsi kudzvanywa, inopindirana neHCl kubva pakuora kwePVC |
| Pamusoro-yakagadziridzwa aluminium hydroxide | 10-12% | Endothermic cooling, inoda silane coupling agent coating (decomposition temp. match PVC processing) |
| Antimony trioxide (Sb₂O₃) | 3-5% | Core synergist, inowedzera kunonoka kwemurazvo kuburikidza neCl-Sb synergy |
| Zinc molybdate (smoke suppressant) | 5-8% | Inokurudzirwa yekuwedzera, inoderedza hutsi density (kiyi yeDIN 4102 kutevedzera) |
| Dipentaerythritol (DPE) | 2-3% | Char-forming aid, inovandudza melt-drip control |
| Thermal stabilizer (Ca-Zn inoumbwa) | 3-4% | Zvakakosha kudzivirira kuora kwekupisa panguva yekugadzirisa |
| Plasticizer (DOP kana eco-alternative) | 0-8% | Gadzirisa kuoma (sarudzo kune yakasimba PVC) |
| Lubricant (calcium stearate) | 1-1.5% | Inovandudza processability, inodzivirira roller kunamatira |
| Kugadzirisa rubatsiro (ACR) | 1-2% | Inowedzera plastification uye masterbatch dispersion |
II. Key Optimization Principles
- Flame Retardant Synergy System
- Cl-Sb Synergy: PVC's inherent chlorine (56%) yakasanganiswa ne3-5% Sb₂O₃ inoumba SbCl₃ chipingamupinyi, ichigonesa gas-phase/condensed-phase dual-action flame retadancy.
- Kusvuta Kusvuta: Zinc molybdate + zinc borate inoderedza hutsi hwehutsi ne>40% (ASTM E662).
- Kuwedzera Char: Aluminium hypophosphite + DPE inogadzira muchinjika-yakabatana phosphoric ester char pa200–250°C, ichitsiva kushomeka kwePVC kwekutanga-char.
- Processing Adaptability
- Temperature Matching: Aluminium hypophosphite (kuora ≥250 ° C) uye pamusoro-yakagadziriswa Al (OH) ₃ (yakagadzikana kusvika> 200 ° C) inokodzera PVC kugadzirisa (160-190 ° C).
- Kugadzikana Kwekusimbisa: Ca-Zn stabilizers inodzivirira kuparara kweresin kubva kuHCl kusunungurwa; ACR inobatsira plastification mune yakakwirira-yekuzadza masisitimu.
- Performance Balance
- Yese murazvo unodzora kurodha: 35-45%, tensile simba rekuchengetedza ≥80% (yakajairika ≥40 MPa yePVC yakaoma).
- Pakuchinjika (inochinjika PVC), tsiva DOP ne8% epoxidized soya bean mafuta (dual plasticizer/flame retardant).
III. Kuedza & Kusimbisa Metrics
Flame Retadancy:
- UL94 V0 (1.6 mm ukobvu)
- Kuderedza Oxygen Index (LOI) ≥32%
Kudzora Kusvuta:
- NBS chiutsi chekamuri bvunzo: Maximum chaiyo optical densityDs≤150 (inopisa maitiro)
Mechanical Properties:
- Kusimba kwesimba ≥35 MPa (yakaomarara), kureba panguva yekuzorora ≥200% (inoshanduka)
Thermal Stability:
- DMA inosimbisa kuti hapana modulus inodonha pa180 ° C.
IV. Mutengo & Eco-Hushamwari Kugadziriswa
Imwewo Mutengo Wakaderera:
- Deredza zinc molybdate kusvika 3%, zvishoma tsiva Al(OH) ₃ neMg(OH) ₂ (wedzera kusvika 15%).
Antimony-Yemahara Solution:
- Bvisa Sb₂O₃, shandisa 2% aluminium diethylphosphinate + 5% nano-kaolin (zvishoma zvishoma; zvinoda 3 mm ukobvu hweV0).
Kukosheswa Kwekusvuta:
- Wedzera 1% silicone resin-yakavharwa kabhoni dema kuti uwedzere kuderedza hutsi hwehutsi ne15%.
V. Mirayiridzo Yekugadzirisa
- Mixing Sequence:
PVC resin → stabilizer + lubricant → zvinodzosa moto (yakaderera kusvika yakakwira density) → plasticizer (spray-yakawedzerwa pekupedzisira). - Kugadzira Tembiricha:
Twin-screw extruder zones: 160 ° C (kudya) → 170 ° C (kunyunguduka) → 180 ° C (kusanganiswa) → 175 ° C (kufa musoro). - Masterbatch Concentration:
Kurudzira 50% kurodha; dilute 1: 1 nemhandara PVC yekuguma-kushandisa jekiseni kuumba.
Ichi chigadziriso chinoenzanisa kunonoka kwemoto, kuderera kweutsi, uye kugadzikana kwekugadzirisa. Zviyedzo zvidiki-zvidiki zvinorairwa usati wayera, nekugadzirisa kunoenderana nechigadzirwa fomu (mashiti, tambo, nezvimwewo).
More info., pls contact lucy@taifeng-fr.com
Nguva yekutumira: Jul-08-2025
