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PMI Foam Core

Up to 30× lighter than traditional materials

Stable at 180 °C high-temperature curing

Uniform microcell structure (50–200 µm)

Model:
D30/D52/D75/D110/D200/D250
Brand:
JLON
Code:
PMI Xs
Thickness:
1MM/2MM/3MM/5MM/10MM/15MM/20MM
Density/cm:
30KG/M3 40KG/M3 50KG/M3 80KG/M3 100KG/M3
Color:
white/Yellow
HS Code:
392119


Availability:



Inquiry

Product Description

Technical Data Sheets of PMI Foam Core

Complete technical data including density, compressive strength, shear strength, tensile strength, flexural strength, compression modulus, shear modulus, water absorption, thermal conductivity and continuous service temperature are available in our official Technical Data Sheet (TDS). Please contact us to download the full test report.

TDS PMI FOAM CORE.pdf

Introduction of PMI Foam Core

JLON Polymethacrylimide (PMI) Foam Core is a high-performance closed-cell rigid structural foam specifically engineered for lightweight sandwich panel structures. Compared with traditional PVC Foam Core and PET Foam Core, PMI foam provides a significantly higher strength-to-weight ratio while maintaining excellent thermal stability and fatigue resistance. It is fully compatible with prepreg manufacturing, vacuum infusion, RTM and autoclave curing processes, making it the preferred core material for aerospace, UAV, radome and other high-performance composite applications.

pmi foam core

Features of PMI Foam Core

1. Exceptional Strength-to-Weight Ratio

JLON PMI foam perfectly combines ultra-low density and high mechanical rigidity. It effectively reduces the dead weight of composite structures while maintaining excellent load-bearing capacity, helping engineers optimize structural design and improve product endurance and payload.

2. Excellent High-Temperature Resistance

Custom-grade PMI foam can withstand continuous working temperatures of 180–210°C, fully meeting high-standard autoclave curing and prepreg molding requirements. It avoids thermal deformation, bubbling and performance attenuation during high-temperature composite processing.

3. Premium Closed-Cell Structure

The uniform closed-cell structure greatly reduces water absorption and air permeability. It maintains long-term structural stability in humid and harsh environments, preventing mildew, corrosion and performance degradation.

4. Outstanding Fatigue Performance

It resists fatigue damage under long-term cyclic loading, perfectly suitable for dynamic components such as UAV wings, wind energy structural parts and racing equipment that require repeated stress bearing.

5. Superior Dielectric Properties

With low dielectric constant and low dielectric loss, JLON PMI foam is an ideal RF-transparent material, widely used in radomes, communication antennas and various microwave transparent composite structures.

PMI foam is frequently combined with carbon fiber fabrics and prepreg laminates to manufacture ultra-lightweight composite sandwich structures for aerospace, UAVs, motorsports and satellite components.

Why Choose JLON

Stable density control and consistent batch quality

Industrial-scale production capabilities

Flexible, customizable sheet dimensions

Strict in-process quality inspections

Proven export experience in the composite materials market

JLON operates strictly as a material supplier, focusing on providing reliable PMI foam core to composite manufacturers worldwide.

Video of PMI Foam Core

Production Process of PMI Foam Core

The production of PMI foam employs a precisely controlled process:

1. Liquid batching and mixing are carried out.

2. The mixture is poured into molds, which are placed in a water tank and heated via water bath to foam and form the blank.

3. The blank undergoes pre-treatment heating in an oven.

4. The blank is transferred to a high-precision oven for final foaming.

5. The blank is sent back into the oven for post-treatment.

6. Finally, it undergoes flattening via a press and is sliced.

The entire process is mechanized and combined with manual inspection to ensure stable product quality.

After machining, PMI foam cores are commonly laminated with carbon fiber prepregs or infused using the vacuum infusion process to manufacture high-performance composite sandwich panels.

Applicationof PMI Foam Core

Aerospace:

Lightweight sandwich cores for aircraft wings, tails, fuselage panels; helicopter and UAV blades.

Transportation:

Lightweight composite panels and sandwich structures used in high-speed trains and metro cars.

Industrial applications of PMI foam core

Industrial Manufacturing:

Wind turbine blades (small to medium); high-performance sandwich panels for fire, thermal.

Sports & Recreation:

Advanced ski and surfboard cores; yacht masts and other lightweight sporting equipment.

Available Density Grades & Typical Applications

Grade	Density (kg/m³)	Typical Applications
D30	30	Lightweight UAV parts, racing equipment, ultra-light composite panels
D52	52	Aircraft interior panels, conventional UAV structures, lightweight radomes
D75	75	High-precision radomes, satellite structural panels, communication equipment
D110	110	Medium and high-load composite structural components
D200	200	Local structural reinforcement, stress concentration parts
D250	250	High-compression load-bearing areas, ultra-high strength structural parts

Surface Finishing & Processing Options

JLON provides diversified customized processing solutions to adapt to different composite molding processes:

Plain Sheets

Single Grooved / Double Grooved / Cross-Grooved (optimize resin flow for infusion)

Perforated (improve resin penetration uniformity)

Scrim Backed / Grid Scored

Precision CNC Machined

Custom Kit Cut Parts (per customer drawings)

Standard Dimensions

Thickness Range: 1 mm – 100 mm

Standard Sheet Sizes: 1220 × 2440 mm, 1250 × 2500 mm

Custom Service: Non-standard sizes and special tolerances are customizable to meet project requirements

Resin Compatibility

JLON PMI foam core is perfectly compatible with all mainstream composite resin systems:

Epoxy Resin

Vinyl Ester Resin

Polyester Resin

Phenolic Resin

BMI Resin

Cyanate Ester Resin

Applicable Manufacturing Processes

Stable performance in all composite molding processes, suitable for high-precision industrial production:

Hand Lay-up

Vacuum Infusion

Resin Transfer Molding (RTM)

Vacuum Bagging

Prepreg Lamination

Autoclave High-Temperature Processing

Compression Molding

Precision CNC Machining & Secondary Bonding

pmi foam

Wide Application Scenarios

1. Aerospace

Widely used in high-end aerospace composite structures requiring lightweight and high temperature resistance: aircraft interior panels, fairings, structural sandwich panels, satellite components and aircraft floor systems.

2. UAV & Drone Industry

It is the preferred core material for high-performance UAV structures, effectively reducing airframe weight and improving flight endurance. Suitable for fixed-wing drones, VTOL UAVs, surveillance and mapping drones, and military UAV equipment. Recommended density: 30–75 kg/m³.

3. Radome & RF Transparent Structures

Thanks to excellent low dielectric properties, it is widely applied in radar radomes, radar protective covers, communication antennas and various RF-transparent composite structures, ensuring stable signal transmission.

4. Medical Equipment

Applied in CT scanning tables, MRI equipment platforms, orthopedic support boards and medical imaging equipment, meeting medical-grade lightweight, stable and non-interference performance requirements.

5. Motorsports & Sports Equipment

Suitable for racing car body panels, formula racing components, high-end bicycle frames, surfboards, skis and racing boat structures, balancing lightweight and impact resistance.

PMI Foam vs PVC Foam vs PET Foam

Not every composite project requires PMI foam. PVC Foam Core is often selected for marine and wind energy applications, while PET Foam Core offers an economical and recyclable solution for transportation and industrial composite panels. Choosing the right core material depends on mechanical performance, temperature resistance and manufacturing process.

Property	PMI Foam	PVC Foam	PET Foam
Weight Performance	Excellent	Good	Good
Compression Strength	Excellent	Medium	Medium
Heat Resistance	Excellent (180–210°C)	Moderate	Good
Autoclave Compatibility	Fully Compatible	Limited	Limited
Aerospace & High-End Use	Excellent	Limited	Limited
Cost	Higher (High Performance)	Lower	Lower

PMI foam is the optimal choice for engineering projects requiring extreme lightweight, high structural strength and high-temperature processing resistance.

Density Selection Guide for Common Applications

Application Scenario	Recommended Density Grade
UAV Wings & Lightweight Airframes	D30
Aircraft Interior Parts	D52
Conventional Radome Structures	D52–D75
Satellite Precision Panels	D75
Motorsport Racing Components	D30–D52
High-Load Composite Structures	D110
Local Structural Reinforcement	D200–D250

Quality Control & Certification

Strict Batch Inspection

Every production batch undergoes full-standard quality inspection, including density testing, compression performance testing, shear performance testing, dimensional tolerance inspection and surface quality inspection. All shipments are traceable to ensure stable and consistent product quality.

Authorized Certifications

We can provide official certification documents upon request: SGS Test Report, RoHS Compliance Certificate, REACH Compliance Certificate, ISO 9001 Quality Management System Certificate.

Packaging & Global Delivery

All PMI foam products are professionally packaged with protective film, corner protection and export-standard fumigated pallets to avoid collision and damage during long-distance transportation. We support global shipping by sea, air and express delivery, providing fast and stable one-stop supply services.

FAQ – JLON PMI Foam Core

Q1: What is PMI Foam Core?

A1: PMI (Polymethacrylimide) foam is a high-performance closed-cell rigid structural foam, specially designed for aerospace-grade composite sandwich structures, featuring ultra-light weight, high strength and high temperature resistance.

Q2: Why is PMI foam more expensive than PVC/PET foam?

A2: PMI foam has far higher mechanical strength, heat resistance and dimensional stability. It can withstand autoclave high-temperature curing, which is irreplaceable for high-end aerospace and UAV projects, delivering higher comprehensive engineering value.

Q3: Can you provide CNC custom cutting and grooving processing?

A3: Yes. We support full customized processing including CNC precision cutting, grooving, perforating and kit cutting according to customer drawings.

Q4: Is PMI foam suitable for autoclave curing?

A4: Absolutely yes. Our PMI foam is professionally optimized for prepreg and autoclave high-temperature molding processes with stable performance.

Q5: Is PMI foam waterproof?

A5: The dense closed-cell structure achieves extremely low water absorption, with excellent waterproof and moisture-proof performance for long-term outdoor and marine use.

Q6: What is your MOQ and lead time?

A6: Small orders and sample orders are acceptable. Standard size sheets are in stock with 3–7 days delivery; customized processing orders take 10–15 working days.

Why Partner with JLON Composite

With years of professional experience in R&D and production of advanced composite core materials, JLON Composite focuses on providing high-reliability structural foam solutions for aerospace, UAV, marine, wind energy and high-end industrial fields. Our core advantages:

Stable large-scale production capacity

Strict full-process quality control system

Flexible OEM & ODM customized services

Precision customized processing support

Cost-effective pricing with stable quality

Fast global delivery service

Professional one-stop technical support