Overview
Flexible PVC (Plasticized Polyvinyl Chloride) is a versatile thermoplastic material known for its excellent flexibility, chemical resistance, durability, electrical insulation, weather resistance, and cost-effectiveness.
Unlike Rigid PVC (PVC-U), Flexible PVC contains plasticizers that significantly increase softness, elasticity, and flexibility while maintaining many of PVC’s core advantages, including flame retardancy and chemical resistance.
Flexible PVC is widely used in:
- Medical Tubing
- Cable Insulation
- Wire Jackets
- Flexible Hoses
- Seals and Gaskets
- Flooring Materials
- Inflatable Products
- Consumer Goods
Due to its adaptability and wide hardness range, Flexible PVC is one of the most commonly used flexible plastics worldwide.
Material Specification
| Property | Value |
|---|---|
| Material Designation | Flexible PVC |
| Full Name | Plasticized Polyvinyl Chloride |
| Common Names | Flexible PVC, Plasticized PVC, Soft PVC |
| Material Family | Flexible Thermoplastic |
| Density | 1.15–1.40 g/cm³ |
| Appearance | Transparent, Colored, Black, White |
| Typical Manufacturing Methods | Extrusion, Injection Molding, Blow Molding, Calendaring |
| Standard Forms | Film, Sheet, Tube, Pellets |
Chemical Composition
Flexible PVC is produced by combining PVC resin with plasticizers and stabilizers.
| Component | Function |
|---|---|
| Polyvinyl Chloride Resin | Structural Matrix |
| Plasticizers | Flexibility and Softness |
| Stabilizers | Thermal Stability |
| Lubricants | Processing Performance |
| Pigments | Color Enhancement |
The amount and type of plasticizer determine the final flexibility and hardness.
Common Flexible PVC Grades
| Grade | Characteristics |
|---|---|
| General Purpose PVC | Standard Flexible Applications |
| Medical Grade PVC | Biocompatible Formulations |
| Cable Grade PVC | Electrical Insulation |
| Food Grade PVC | Food Contact Applications |
| Flame Retardant PVC | Enhanced Fire Performance |
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 10–25 MPa |
| Yield Strength | 8–20 MPa |
| Elongation at Break | 200–500% |
| Flexural Strength | 10–30 MPa |
| Flexural Modulus | 0.02–0.5 GPa |
| Hardness | Shore A 40–95 |
| Tear Strength | Good |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Flexibility | Outstanding |
| Elasticity | Excellent |
| Toughness | Excellent |
| Impact Resistance | Good |
Flexible PVC offers excellent durability while maintaining softness and flexibility.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.15–1.40 g/cm³ |
| Water Absorption | 0.05–0.40% |
| Thermal Conductivity | 0.14–0.20 W/m·K |
| Electrical Resistivity | >10¹² Ω·cm |
| Specific Heat Capacity | 1000–1300 J/kg·K |
Flexible PVC remains stable across a wide range of environmental conditions.
Thermal Properties
| Property | Value |
|---|---|
| Glass Transition Temperature | -20°C to 20°C |
| Heat Deflection Temperature | 50–70°C |
| Continuous Service Temperature | -20°C to 60°C |
| Short-Term Service Temperature | Up to 75°C |
Flexible PVC performs well in moderate-temperature environments.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| Flexible PVC | 1.25 | 20 MPa |
| Silicone Rubber | 1.15 | 10 MPa |
| TPU | 1.20 | 35 MPa |
| LDPE | 0.92 | 12 MPa |
Flexible PVC offers a balance of strength, flexibility, and affordability.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Excellent |
| Acids | Excellent |
| Alkalis | Excellent |
| Salt Solutions | Excellent |
| Alcohols | Good |
| Oils & Greases | Good |
| Hydrocarbons | Moderate |
| Aromatic Solvents | Poor |
Flexible PVC is suitable for many industrial fluid handling applications.
Weather Resistance
| Property | Performance |
|---|---|
| Moisture Resistance | Excellent |
| Corrosion Resistance | Excellent |
| Outdoor Durability | Good |
| UV Resistance | Moderate |
UV-stabilized grades are recommended for long-term outdoor use.
Flame Retardancy
| Property | Performance |
|---|---|
| Self-Extinguishing | Yes |
| Flame Resistance | Excellent |
| UL Flammability Rating | Typically V-0 or V-1 |
| Fire Safety | Excellent |
Flexible PVC naturally offers superior flame resistance compared to most flexible plastics.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹² Ω·cm |
| Surface Resistivity | >10¹¹ Ω |
| Dielectric Strength | 15–30 kV/mm |
| Dielectric Constant | 3.0–5.0 |
Flexible PVC is widely used for wire and cable insulation.
Flexibility & Elasticity
| Property | Performance |
|---|---|
| Bendability | Outstanding |
| Flex Life | Excellent |
| Recovery Characteristics | Good |
| Soft-Touch Feel | Excellent |
The flexibility can be customized by adjusting plasticizer content.
Machinability
| Process | Rating |
|---|---|
| CNC Cutting | Good |
| Die Cutting | Excellent |
| Welding | Excellent |
| Heat Sealing | Excellent |
| Fabrication | Excellent |
Fabrication Comparison
| Material | Flexibility |
|---|---|
| Flexible PVC | Outstanding |
| TPU | Excellent |
| Silicone | Outstanding |
| LDPE | Good |
Flexible PVC is easy to fabricate into tubing, sheets, and flexible components.
Processing Characteristics
| Property | Rating |
|---|---|
| Extrusion | Outstanding |
| Injection Molding | Excellent |
| Blow Molding | Excellent |
| Calendaring | Outstanding |
| Heat Sealing | Excellent |
Flexible PVC is one of the easiest flexible plastics to process.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ISO | Flexible PVC |
| ASTM | Plasticized PVC |
| DIN | Weich-PVC |
| JIS | Soft PVC |
| GB/T (China) | 软质聚氯乙烯 |
| UL | Flexible PVC |
Available Forms
| Product Type | Availability |
|---|---|
| Film | Yes |
| Sheet | Yes |
| Tube | Yes |
| Pellets | Yes |
| Extruded Profiles | Yes |
| Injection Molded Parts | Yes |
Typical Applications
Medical Industry
- Medical Tubing
- Blood Bags
- IV Components
- Fluid Transfer Systems
Electrical Industry
- Wire Insulation
- Cable Jackets
- Protective Covers
- Electrical Sleeving
Industrial Applications
- Flexible Hoses
- Chemical Tubing
- Protective Curtains
- Conveyor Skirting
Construction Industry
- Flooring
- Wall Coverings
- Roofing Membranes
- Door Seals
Consumer Products
- Inflatable Products
- Toys
- Sporting Goods
- Flexible Containers
Automotive Industry
- Interior Trim
- Wire Harness Protection
- Flexible Seals
- Protective Covers
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Extrusion | Outstanding |
| Injection Molding | Excellent |
| Blow Molding | Excellent |
| Calendaring | Outstanding |
| Heat Sealing | Excellent |
Advantages
Excellent Flexibility
Can be formulated from soft rubber-like materials to semi-rigid products.
Outstanding Chemical Resistance
Resists many industrial chemicals and fluids.
Natural Flame Retardancy
Superior fire resistance compared with many flexible polymers.
Excellent Electrical Insulation
Widely used in cable and wire applications.
Durable and Tough
Provides long service life in demanding environments.
Cost Effective
One of the most economical flexible plastics available.
Limitations
Lower Structural Strength
Not suitable for load-bearing structural applications.
Moderate Heat Resistance
Less suitable for continuous high-temperature environments.
Plasticizer Migration
Some formulations may experience plasticizer loss over time.
Environmental Concerns
Certain traditional plasticizers face increasing regulatory scrutiny.
Comparison with Common Flexible Plastics
| Property | Flexible PVC | TPU | Silicone | LDPE |
|---|---|---|---|---|
| Flexibility | Outstanding | Excellent | Outstanding | Good |
| Chemical Resistance | Excellent | Good | Excellent | Excellent |
| Flame Retardancy | Excellent | Moderate | Excellent | Poor |
| Cost | Low | Higher | Highest | Low |
| Electrical Insulation | Excellent | Good | Excellent | Good |
Comparison with Rigid PVC
| Property | Flexible PVC | PVC-U |
|---|---|---|
| Flexibility | Much Higher | Low |
| Tensile Strength | Lower | Higher |
| Impact Resistance | Better | Moderate |
| Structural Applications | Limited | Excellent |
| Cable Applications | Preferred | Not Suitable |
Available Surface Finishes
Standard Finishes
- Gloss Finish
- Matte Finish
- Transparent Finish
Functional Finishes
- Embossed Surface
- Textured Surface
- Anti-Slip Surface
Specialty Grades
- Medical Grade Flexible PVC
- Food Grade Flexible PVC
- Flame Retardant PVC
- UV-Stabilized PVC
- Low-Temperature PVC
Frequently Asked Questions (FAQ)
What is Flexible PVC?
Flexible PVC is a plasticized polyvinyl chloride material known for softness, flexibility, durability, and chemical resistance.
What is Flexible PVC used for?
Typical applications include:
- Medical Tubing
- Cable Insulation
- Flexible Hoses
- Flooring
- Consumer Products
What is the difference between Flexible PVC and Rigid PVC?
Flexible PVC contains plasticizers that increase flexibility, while Rigid PVC is designed for structural applications.
Is Flexible PVC chemically resistant?
Yes. Flexible PVC provides excellent resistance to many chemicals, moisture, and corrosive environments.
Is Flexible PVC flame retardant?
Yes. Flexible PVC is naturally self-extinguishing and offers excellent flame resistance.
Can Flexible PVC be welded?
Yes. Flexible PVC can be heat welded, RF welded, and solvent bonded.
Why choose Flexible PVC?
Because it combines:
- Excellent Flexibility
- Chemical Resistance
- Flame Retardancy
- Electrical Insulation
- Cost Efficiency
Does GCNOV provide Flexible PVC manufacturing services?
Yes. GCNOV provides:
- Flexible PVC Extrusion
- Injection Molding
- Tube Manufacturing
- Cable Component Production
- Medical PVC Components
- Prototype Development
- Low-Volume Production
- Mass Production