Irradiation Cross-Linked Polypropylene Foam Ixpp Foam

IXPP Foam Sheet - Irradiation Cross-Linked Polypropylene Foam

TOPSUN IXPP foam sheet is an irradiation cross-linked polypropylene foam designed for automotive interiors, battery thermal insulation, electronic cushioning, construction insulation, protective packaging and high-temperature industrial applications. Compared with many common polyolefin foams, IXPP foam offers better heat resistance, lower odor, good dimensional stability, strong mechanical performance and reliable closed-cell insulation.

The material is produced from polypropylene through extrusion, irradiation cross-linking and foaming. Its fine closed-cell structure provides cushioning, shock absorption, thermal insulation, moisture resistance and chemical resistance while keeping the final component lightweight and easy to process.

Key Features of IXPP Foam

• High-temperature resistance: IXPP foam can support applications requiring service temperatures around 120°C and selected short-term processing conditions above this range, depending on grade and assembly design.

• Excellent resilience: good cushioning, rebound and impact absorption for automotive, packaging and protective applications.

• High closed-cell rate: closed-cell structure above 98% helps reduce water absorption and water vapor permeability.

• Thermal insulation: low thermal conductivity below 0.036 W/m·K helps reduce heat transfer in insulation and battery applications.

• Chemical resistance: polypropylene-based foam provides better resistance to many chemicals than several general-purpose foam materials.

• Low odor and low VOC: suitable for automotive interior and passenger-space applications where odor and emissions matter.

• Good processability: can be laminated, die-cut, thermoformed, vacuum-formed, punched and converted into custom parts.

IXPP Foam General Specification

IXPP Foam Technical Specification

The following data shows typical technical values for different IXPP expansion ratios. Final performance depends on formulation, thickness, color, density, test method and production tolerance. Confirm the target standard and application conditions before bulk production.

Applications of IXPP Foam

Automotive Interior and Damping Materials

IXPP foam is suitable for automotive roof liners, steering wheels, luggage-compartment linings, air-conditioner damping panels, side guards, inner-door energy-absorbing pads, buffer pads and headrests. Its heat resistance, light weight, sound insulation and dimensional stability support automotive interior applications.

Battery Thermal Insulation

IXPP foam can be used as a thermal insulation material for 90–120°C heat-carrier cycle batteries and as an insulation layer in high-temperature environments. It can also be considered for spacing, buffering and vibration-control structures in suitable battery assemblies.

Engine Room and High-Temperature Insulation

Because of its thermal stability and low shrinkage at elevated temperatures, IXPP foam is suitable for selected engine-room insulation, instrument insulation and heat-management components where higher temperature resistance than common PE foam is required.

Protective Packaging and Electronics

IXPP foam provides cushioning, resilience and impact absorption for electronic components, precision instruments and fragile goods. It can be die-cut or laminated into protective layers, inserts, dividers and shock-absorbing pads.

Construction, Flooring and Acoustic Insulation

IXPP foam may be used in flooring, roofing, wall systems, acoustic layers and thermal insulation components. Its moisture resistance, chemical resistance and stable closed-cell structure help support long-term durability in suitable assemblies.

Consumer Products, Sports and Leisure

The material can be used in sports equipment, household products, protective cases and lightweight cushioning components where flexibility, safety, thermal insulation and durability are required.

Why IXPP Foam Is Used in Automotive and Battery Applications

Automotive and battery applications often require materials with low odor, low VOC emissions, thermal stability, low shrinkage, good mechanical strength and reliable cushioning. IXPP foam is a practical choice because polypropylene foam maintains dimensional stability at higher temperatures than many common PE foam grades while providing a lightweight closed-cell structure.

For battery and thermal-management components, the final design should consider compression, heat exposure, flame-retardant requirement, dielectric requirement, adhesive compatibility and assembly tolerance. TOPSUN can review drawings or samples to recommend density, thickness and converting method.

Custom IXPP Foam Processing Capabilities

Cutting and Slicing

IXPP foam sheets and laminated blocks can be cut to length, cut to width and sliced to the required thickness according to the project specification.

Lamination and Multilayer Structures

Single-layer IXPP foam is available from 1–6 mm, while multilayer laminated structures can be produced up to 100 mm. Lamination can combine thickness, cushioning, insulation and functional surface requirements.

Die Cutting and Punching

Custom dies can produce repeatable IXPP pads, seals, strips, cushioning layers, spacers, protective liners and insulation components for medium and high-volume production.

Thermoforming and Vacuum Forming

IXPP foam has good thermal weldability and thermal processing performance. It can be thermoformed or vacuum-formed into shaped automotive, packaging, protection and insulation parts when the correct grade and forming condition are selected.

Adhesive Backing and Surface Lamination

Pressure-sensitive adhesive, films, fabrics or other compatible facings can be laminated to IXPP foam for installation-ready pads, liners, acoustic materials and insulation components.

Why Choose TOPSUN IXPP Foam?

TOPSUN is a professional foam supplier with material and converting capabilities for IXPP foam, XPE foam, IXPE foam, EVA foam, PE foam, CR foam, EPDM foam, neoprene foam, SBR foam, NBR foam and microcellular soft PVC foam. Materials can be supplied in sheets, rolls, laminated structures or finished custom parts.

• IXPP expansion ratios from 5 to 30 times for different density and cushioning requirements.

• Single-layer and multilayer structures for insulation, cushioning and automotive components.

• Custom cutting, slicing, lamination, die cutting, thermoforming and vacuum forming.

• Support for automotive interior, battery, electronics, packaging and construction applications.

• Material selection support based on temperature, compression, density, VOC, insulation and assembly requirements.

Our factory is located in Changzhou, Jiangsu Province, approximately one hour by road from Shanghai Port, supporting convenient international shipment.

IXPP Foam FAQ

What Is IXPP Foam Sheet?

IXPP foam sheet is irradiation cross-linked polypropylene foam. It is a closed-cell foam material made by cross-linking polypropylene through electron-beam or radiation treatment, then foaming it into a lightweight structure with improved thermal stability, mechanical strength, resilience and dimensional performance.

What Are the Main Advantages of IXPP Foam?

IXPP foam provides high-temperature resistance, low shrinkage, excellent resilience, good tensile strength, low water absorption, low thermal conductivity, low odor, low VOC emissions and easy processing. These advantages make it useful for automotive interiors, battery insulation, electronics, construction and protective packaging.

What Is the Difference Between IXPP Foam and IXPE Foam?

IXPP foam is irradiation cross-linked polypropylene foam, while IXPE foam is irradiation cross-linked polyethylene foam. IXPP generally offers better high-temperature resistance and lower thermal shrinkage, while IXPE is often selected for flexible insulation, packaging and cushioning applications. The correct choice depends on temperature, density, compression, processing and cost requirements.

What Temperature Can IXPP Foam Withstand?

TOPSUN IXPP foam is designed for high-temperature applications, with typical service use around 120°C and dimensional stability testing at 120°C for one hour. Some PP foam applications may require higher short-term processing temperatures, but final suitability must be confirmed by grade, thickness, compression and assembly conditions.

Is IXPP Foam Closed Cell?

Yes. IXPP foam has a high closed-cell structure, with a closed-cell rate above 98% according to the page specification. This helps reduce water absorption and supports thermal insulation, cushioning and moisture-resistant applications.

Can IXPP Foam Be Used for Battery Thermal Insulation?

Yes. IXPP foam can be used as thermal insulation material for 90–120°C heat-carrier cycle batteries and related high-temperature insulation structures. The final battery design should verify compression, flame behavior, dielectric performance, adhesive compatibility and thermal-aging performance.

Can IXPP Foam Be Thermoformed or Vacuum-Formed?

Yes. IXPP foam has good thermal weldability, thermal processing performance and high-temperature dimensional stability. It can be thermoformed or vacuum-formed for automotive interior parts, protective structures and insulation components when the correct grade and forming process are selected.

Can TOPSUN Supply Custom IXPP Foam Parts?

Yes. TOPSUN can supply IXPP foam sheets, rolls, laminated structures and custom converted parts. Processing options include cutting, slicing, lamination, die cutting, punching, thermoforming, vacuum forming and adhesive backing.

How Do I Request IXPP Foam Samples and Pricing?

Email july@topsunfoam.com with the required expansion ratio, density, thickness, width, color, quantity, application, drawing, processing method, temperature requirement and destination country. TOPSUN will review the requirement and provide sample and quotation information.