Vinyl/Nitrile (PVC/NBR) Foam

Vinyl Nitrile PVC/NBR Foam for Sealing, Gaskets and Insulation

Topsun Vinyl Nitrile foam, also known as PVC/NBR foam or NBR/PVC foam, is a flexible cellular material used for sealing, gasketing, thermal insulation, cushioning, vibration damping and custom industrial foam components.

The material combines nitrile rubber and PVC in a flexible foam structure. The referenced grade on this page has a closed-cell structure with low thermal conductivity, resistance to water vapor penetration and resistance to acid, fuel and oil.

Vinyl Nitrile PVC/NBR foam can be supplied as sheets, rolls, strips, pads, tapes, gaskets and other converted parts. One-side or double-side adhesive backing can also be applied according to assembly and installation requirements.

Vinyl Nitrile PVC/NBR Foam Product Information

Key Properties of Vinyl Nitrile Foam

• Flexible cellular structure: suitable for sealing, cushioning and conforming to uneven surfaces.

• Closed-cell grade available: the referenced technical grade has a closed-cell structure for insulation and moisture-resistant applications.

• Oil and fuel resistance: existing product information lists resistance to acid, fuel and oil.

• Thermal insulation: the referenced closed-cell grade has thermal conductivity of 0.038 W/m·K.

• Water vapor resistance: the referenced technical grade lists a water vapor resistance index of ≥7000.

• Compression performance: suitable for gaskets, sealing pads and flexible interfaces when the correct grade and compression are selected.

• Vibration damping: flexible foam can help isolate contact and vibration between suitable components.

• Custom fabrication: suitable material can be cut, sliced, laminated, die-cut and adhesive-backed.

Vinyl Nitrile PVC/NBR Foam Technical Specification

The following table retains the existing technical data for the referenced closed-cell PVC/NBR foam grade. These values should not automatically be applied to every density or construction in the broader product range.

Note: the existing source table lists the upper and lower use-limit values without units. Confirm the service-temperature range of the selected production grade before application.

What Is Vinyl Nitrile PVC/NBR Foam?

Vinyl Nitrile foam is a flexible foam based on a combination of nitrile rubber and PVC. It is also commonly described as PVC/NBR foam, NBR/PVC foam or rubber-plastic sponge foam.

The referenced product grade has a soft closed-cell structure. This provides a combination of flexibility, thermal insulation, water vapor resistance and compression characteristics useful for sealing and insulation applications.

Compared with solid nitrile rubber, the cellular structure reduces weight and allows the material to compress more easily around uneven surfaces, making it suitable for foam gaskets, seals, cushioning pads and vibration-isolation components.

PVC/NBR foam can be supplied in different densities and thicknesses and converted into sheets, rolls, strips, tapes, pads and die-cut parts.

Vinyl Nitrile Foam for Gaskets and Sealing

Flexible PVC/NBR foam can conform to mating surfaces when compressed, making it suitable for selected gasket and sealing applications.

The foam can be die-cut into custom shapes according to equipment housings, automotive components, panels and other assemblies. Density and thickness should be selected according to the gap size, compression force and required sealing performance.

Adhesive backing can be added to suitable foam gaskets and sealing strips to help position the component during assembly.

PVC/NBR Foam for Oil and Fuel Contact Environments

One reason Vinyl Nitrile foam is selected for industrial and automotive applications is its resistance to acid, fuel and oil as listed in the existing product information.

Chemical compatibility depends on the specific fluid, concentration, exposure time, temperature and foam grade. Applications involving continuous or critical chemical contact should therefore be evaluated according to the actual service conditions.

PVC/NBR Foam for Thermal Insulation

The referenced closed-cell grade has thermal conductivity of 0.038 W/m·K according to the supplied technical table. The cellular structure reduces heat transfer and makes the material suitable for selected HVAC, refrigeration and equipment insulation applications.

For insulation systems, foam thickness should be selected according to operating temperature, ambient conditions, equipment geometry and the required thermal performance.

Closed-Cell PVC/NBR Foam for Moisture Resistance

The referenced Vinyl Nitrile foam grade has a closed-cell structure and a listed water vapor resistance index of ≥7000. These characteristics support applications where limiting moisture penetration is important.

For HVAC and low-temperature insulation systems, joints, seams and exposed edges should be installed according to the requirements of the complete insulation system.

PVC/NBR Foam for Vibration Damping and Cushioning

Flexible Vinyl Nitrile foam can be used as a cushioning interface between components. Under suitable compression, it can reduce direct contact and help attenuate vibration transmitted through equipment panels, automotive assemblies and other structures.

Required foam density and thickness depend on the component weight, available compression and vibration conditions of the assembly.

Typical Vinyl Nitrile PVC/NBR Foam Applications

Vinyl Nitrile Foam Sheets, Rolls and Converted Parts

Vinyl Nitrile PVC/NBR foam can be supplied as raw material or converted into application-specific components.

Vinyl Nitrile Foam vs. Solid Nitrile Rubber

How to Select PVC/NBR Foam

The correct Vinyl Nitrile foam grade depends on the finished application and required mechanical and environmental performance.

• Application: sealing, gasketing, HVAC insulation, cushioning, automotive or industrial equipment.

• Cell structure: confirm the required foam construction for the application.

• Density: identify the required firmness, compression and support level.

• Thickness: select according to gap size, insulation requirement or cushioning requirement.

• Compression: provide available closure force and expected compressed thickness for gasket applications.

• Oil or fuel exposure: identify the specific fluid, contact time and operating temperature where relevant.

• Thermal requirement: provide operating and ambient temperatures for insulation applications.

• Adhesive backing: specify plain foam, one-side adhesive or double-side adhesive.

• Finished form: sheet, roll, strip, tape, gasket, pad or custom die-cut component.

• Dimensions: provide width, length, thickness or finished-part drawing.

• Estimated quantity: provide sample, trial and production quantities where available.

PVC/NBR Foam Processing Capabilities

Topsun can convert foam materials according to customer dimensions, drawings and finished component requirements.

1. Cutting: sheets, rolls and foam components can be cut according to required dimensions.

2. Slicing: foam materials can be sliced to the required thickness.

3. Lamination: hot-melt film lamination, flame lamination and pressure-sensitive adhesive lamination are available.

4. Laser Cutting: suitable custom shapes can be cut according to digital drawings.

5. Die Cutting: custom gaskets, pads, strips and other repeatable components can be produced according to drawings.

6. Compression Molding: three-dimensional molded foam and foam composite components can be produced for suitable applications.

7. Engraving: suitable for tool-box inserts, packaging inserts and other custom foam components.

8. Silk-Screen Printing: logos and patterns can be printed on suitable foam surfaces.

9. Adhesive Backing: pressure-sensitive adhesive and release liner can be applied for foam tapes, strips, pads, gaskets and other components.

Other Foam Materials Available from Topsun

Topsun supplies NBR/PVC foam, NBR foam, EVA foam, PE foam, XPE foam, IXPE foam, CR foam, EPDM foam, neoprene foam, SBR foam and micro-cell soft PVC foam in sheet, roll and customized converted forms.

About Topsun Foam

Topsun supplies foam materials and custom foam components for automotive, HVAC, construction, equipment, packaging and industrial buyers. Customers can provide density, thickness, dimensions, drawings and application information for product evaluation.

Our facility is located in Changzhou City, Jiangsu Province, China, with convenient access to Shanghai Port for international shipments.

Vinyl Nitrile PVC/NBR Foam FAQ

What is Vinyl Nitrile foam?

Vinyl Nitrile foam is a flexible cellular material based on nitrile rubber and PVC. It is also commonly referred to as PVC/NBR foam, NBR/PVC foam or rubber-plastic sponge foam.

Is Vinyl Nitrile foam the same as PVC/NBR foam?

Yes. Vinyl Nitrile foam, PVC/NBR foam and NBR/PVC foam are commonly used names for this type of nitrile rubber and PVC foam material.

Is this PVC/NBR foam closed cell?

The technical grade shown in the specification table on this page is identified as closed-cell foam. Topsun's broader NBR/PVC range includes different foam constructions, so the required cell structure should be confirmed when ordering.

What is PVC/NBR foam used for?

Typical applications include industrial gaskets, sealing strips, HVAC insulation, refrigeration, automotive components, cushioning pads, vibration-control parts and adhesive-backed foam components.

What density is available?

The broader Topsun PVC/NBR product range lists densities from 50–150 kg/m³. The specific closed-cell technical grade shown in the table lists density from 50–90 kg/m³.

What thickness is available?

Existing product information lists thicknesses mainly from 3–50 mm. Required thickness should be selected according to sealing, insulation, cushioning or fabrication requirements.

Is PVC/NBR foam resistant to oil and fuel?

Existing product information lists resistance to acid, fuel and oil. For direct or prolonged chemical exposure, compatibility should be evaluated according to the specific fluid, concentration, contact time and operating temperature.

Can Vinyl Nitrile foam be used for gaskets?

Yes. PVC/NBR foam can be die-cut into custom gaskets, seals, pads and strips. Density, thickness and compression should be selected according to the mating surfaces and required sealing function.

What is the thermal conductivity of the referenced PVC/NBR foam?

The technical table for the referenced closed-cell grade lists thermal conductivity of 0.038 W/m·K according to ASTM C 534.

What is the water vapor resistance index?

The referenced closed-cell grade lists a water vapor resistance index of ≥7000 according to DIN EN 12086.

Can PVC/NBR foam be supplied with adhesive backing?

Yes. Existing product information includes both one-side and double-side adhesive options. The bonding substrate and service conditions should be provided when selecting the adhesive construction.

Can Topsun supply custom die-cut PVC/NBR foam parts?

Yes. Topsun provides cutting, slicing, lamination, laser cutting and die-cutting capabilities for suitable foam materials. Customers can provide drawings or finished dimensions for evaluation.

What information should I provide for a quotation?

Please provide the application, required cell structure, density if known, thickness, width and length, adhesive requirement, operating environment, chemical exposure where applicable, finished dimensions and estimated quantity.

How can I request a PVC/NBR foam sample?

Send your requirements to july@topsunfoam.com, including density if known, thickness, dimensions, application, adhesive requirement and estimated quantity for evaluation.