🧩 PVC-PH / PVC-FLEX – Plasticized Polyvinyl Chloride
(Flexible variants of PVC obtained by adding plasticizers to reduce chain rigidity. These materials offer elasticity, resistance to oils, water, electrical currents, and weathering, making them essential for gaskets and insulation.)
🔹 What is PVC-PH / PVC-FLEX
PVC-PH (Plasticized Hard) and PVC-FLEX are the “insulation specialists” of the automotive industry. At ReplastMD, we treat these as critical materials for sealing and electrical protection. By controlling the amount of plasticizers, we can achieve various hardness levels (from 40A to 95A Shore). It is a self-extinguishing material, widely used for electrical boots, protective films, and interior trim where a soft, durable finish is required.
🔧 Composition & Properties
- Polymer Base: Polyvinyl Chloride (PVC) ~60–70%.
- Plasticizers: Phthalates or eco-friendly alternatives ~25–35%.
- Density: ~ 1.20 – 1.35 g/cm³.
- Safety: Inherently flame retardant (self-extinguishing).
- Visuals: Soft, smooth, glossy or matte; often translucent or black.
🚗 Where it is used in the automotive industry
| Component | Example parts | Observations |
| Gaskets / Hoses / Boots | VW, Toyota, Renault | Flexibility + oil resistance |
| Electrical Caps & Boots | BMW, Mercedes | Excellent insulation, self-extinguishing |
| Protective Membranes | Ford, Dacia | Elasticity and UV resistance |
| Interior Aesthetic Parts | Hyundai, Peugeot | Soft texture, matte or glossy finish |
🔧 Welding and Bonding Methods
| Method | Optimal Temp | Observations |
| Hot Air | 230 – 260 °C | Clean weld; avoid overheating to prevent chlorine release |
| Heat Plate (Mirror) | ✅ Recommended | Uniform bonding without air bubbles |
| Chemical Bonding | ✅ Recommended | PVC solvents (Cyclopentanone, THF, MEK) |
💡 ReplastMD Recommendation: Weld at ~250 °C with controlled hot air or use chemical bonding for thin foils and gaskets. PVC-FLEX is ideal for parts requiring oil, water, flame, and ozone resistance.