Views: 0 Author: Site Editor Publish Time: 2025-07-16 Origin: Site
| Property | Solid Silicone (HTV) | Liquid Silicone (LSR) |
|---|---|---|
| Form | Solid (sheets, pre-forms) | Liquid (low viscosity, injectable) |
| Curing Method | High-temperature vulcanization (slow) | Platinum-catalyzed addition cure (fast) |
| Curing Time | 5–30 minutes at 160–200°C | Seconds to minutes at 120–200°C |
Key Insight:
HTV requires longer curing times and higher pressure.
LSR cures rapidly, making it ideal for high-volume production.
| Factor | HTV Silicone | LSR Silicone |
|---|---|---|
| Molding Process | Compression/transfer molding | Injection molding |
| Tooling Cost | Lower (simpler molds) | Higher (precision molds required) |
| Production Speed | Slower (manual labor involved) | Faster (fully automated) |
| Overmolding Bond | Requires adhesives/primers | Better adhesion (flows into micro-pores) |
Key Insight:
HTV is better for low-to-medium volume production.
LSR excels in high-precision, high-speed manufacturing.
| Property | HTV Silicone | LSR Silicone |
|---|---|---|
| Tear Strength | Higher (more durable) | Lower (but can be reinforced) |
| Temperature Range | -50°C to 200°C | -50°C to 250°C (special grades) |
| Transparency | Moderate (may contain impurities) | Excellent (medical/food-grade clarity) |
| Shrinkage | 2–4% (less dimensional stability) | 0.1–0.5% (high precision) |
| Chemical Resistance | Good (ozone/UV resistant) | Excellent (low extractables, FDA compliant) |
Key Insight:
HTV is better for rugged applications (e.g., industrial seals).
LSR is preferred for medical, food-contact, and optical applications.
| HTV Silicone (Solid) | LSR Silicone (Liquid) |
|---|---|
| ✔ Kitchen utensils (heat-resistant handles) | ✔ Baby bottle nipples (safety-critical) |
| ✔ Automotive gaskets (high durability) | ✔ Medical devices (biocompatible) |
| ✔ Industrial seals (tear-resistant) | ✔ Wearable electronics (precise sealing) |
HTV Silicone: Lower material cost but higher labor/energy expenses (best for small batches).
LSR Silicone: Higher material cost but lower per-unit cost in mass production.
✅ Choose HTV Silicone if:
You need high tear resistance.
Your production volume is low-to-medium.
Cost is a major concern.
✅ Choose LSR Silicone if:
You require high precision (e.g., micro-features).
Your product needs medical/food-grade certification.
You’re producing at high volumes.
Both HTV and LSR silicones offer unique advantages. The right choice depends on your product requirements, budget, and production scale.
