What is the difference between TPE and PVC

TPE (Thermoplastic Elastomer) and PVC (Polyvinyl Chloride) are two common plastic materials with significant differences in multiple aspects. Below is a detailed comparison between TPE and PVC:

I. Material Properties

Elasticity:

• TPE: Excellent elasticity, capable of high stretching without breaking.
• PVC: Limited elasticity, prone to fracture under stress.

Temperature Resistance:

• TPE: Performs well in a temperature range of -50°C to 120°C (or -50°C to 100°C, depending on the formulation).
• PVC: Becomes brittle at low temperatures and softens/deforms at high temperatures.

Environmental Friendliness:

• TPE: Produced via eco-friendly processes, non-toxic, odorless, recyclable, and compliant with EU RoHS standards.
• PVC: Contains chlorine, releases toxic gases during production, is non-biodegradable, and poses environmental pollution risks.

II. Applications

TPE:
Widely used in industries requiring elasticity, temperature resistance, and sustainability, such as:

• Automotive (interior/exterior trims, floor mats, seals),
• Consumer goods (household items, toys, pet products),
• Sporting goods (tool grips, watch straps), and adult products.

PVC:
Valued for waterproofing, fire resistance, chemical stability, and durability, applied in:

• Construction (pipes, window frames, roofing),
• Electrical (cables),
• Daily essentials (plastic bags, floor coverings),
• Food packaging (if food-safe certified), and medical devices.

III. Price and Cost

Price:

• TPE: ¥20,000–50,000/ton (varies by formulation and performance).
• PVC: ¥8,000–12,000/ton (more affordable).

Cost Efficiency:

• TPE: Higher initial cost but long-term savings due to recyclability.
• PVC: Lower upfront cost but higher environmental disposal expenses.

IV. Identification Methods

Flame Color:

• PVC: Green flame at the base.
• TPE: Blue flame at the base.

Burning Odor:

• PVC: Releases pungent chlorine fumes.
• TPE: Produces a mild, sweet smell.

Flame Retardancy:

• TPE: UL94-HB (continues burning after ignition).
• PVC: UL94-V2 (self-extinguishing).

Conclusion

TPE and PVC differ significantly in material properties, applications, pricing, and identification methods. The choice between them should depend on specific requirements, such as environmental concerns, temperature conditions, mechanical demands, and budget constraints.