The Fundamentals of Machine For Pu Foam: Material Grades, Quality Standards, and Performance Metrics

Types of Machines for PU Foam

A PU foam processing machine is specifically engineered to handle the unique chemical and physical properties of polyurethane foam. The type of machine used depends heavily on the specific category of PU foam being produced or applied, as each foam variant has distinct formulation, curing, and application requirements. Understanding these differences ensures optimal performance, efficiency, and end-product quality.

Flexible PU Foam

Characterized by its open-cell structure, flexible PU foam can be easily compressed and deformed while maintaining its ability to return to its original shape. This elasticity makes it ideal for comfort-focused applications.

Advantages

• Excellent cushioning and shock absorption
• Highly conformable and soft to touch
• Good airflow due to porous structure
• Cost-effective for large-scale production

Limitations

• Lower durability under constant heavy load
• Less support compared to high-resilience foams
• May degrade over time with UV or moisture exposure

Best for: Furniture upholstery, automotive seating, mattresses, carpet underlays

High-Resilience (HR) PU Foam

HR foam features a more advanced polymer structure that enhances elasticity, durability, and load-bearing capacity. It rebounds quickly after compression, offering superior long-term comfort.

Advantages

• Superior durability and longevity
• Excellent support and comfort retention
• High resistance to sagging and deformation
• Ideal for high-use environments

Limitations

• Higher material and processing costs
• Requires precise mixing and curing controls
• Heavier than standard flexible foam

Best for: Premium furniture, office seating, automotive interiors, medical support cushions

Viscoelastic PU Foam (Memory Foam)

Also known as memory foam, this temperature- and pressure-sensitive material slowly conforms to body contours and gradually returns to shape. It provides exceptional pressure distribution and comfort.

Advantages

• Outstanding pressure point relief
• Reduces motion transfer (ideal for sleep surfaces)
• Excellent for orthopedic and therapeutic use
• Customizable firmness levels

Limitations

• Slower response time (delayed rebound)
• Sensitive to temperature variations
• Requires specialized low-speed pouring and curing systems

Best for: Orthopedic mattresses, pillows, medical beds, therapeutic seating

Rigid PU Foam

Dense and structurally strong, rigid PU foam is designed for insulation and load-bearing applications. It features a closed-cell structure that provides excellent thermal resistance.

Advantages

• Exceptional thermal insulation properties
• High strength-to-weight ratio
• Resistant to moisture and chemicals
• Energy-efficient in building and refrigeration

Limitations

• Brittle under extreme stress or impact
• Less flexible, not suitable for dynamic applications
• Requires precise metering and high-pressure dispensing

Best for: Construction insulation, refrigeration units, automotive panels, structural composites

Anti-static PU Foam

A specialized variant of flexible foam infused with conductive additives to dissipate static electricity. It maintains cushioning properties while preventing electrostatic discharge (ESD).

Advantages

• Protects sensitive electronic components from ESD
• Combines cushioning with electrical safety
• Used in controlled environments (e.g., cleanrooms)
• Durable and reusable in packaging applications

Limitations

• Higher cost due to conductive additives
• Limited color and formulation options
• Requires specialized handling and storage

Best for: Electronic packaging, server racks, medical devices, aerospace components

Type of PU Foam	Density Range	Key Properties	Machining Requirements	Primary Applications
Flexible PU Foam	15–50 kg/m³	Elastic, porous, soft	Standard pouring, moderate curing control	Furniture, seating, underlays
High-Resilience (HR) Foam	40–80 kg/m³	Durable, fast rebound, supportive	Precise mixing, temperature-controlled curing	Premium seating, medical supports
Viscoelastic (Memory) Foam	40–100 kg/m³	Pressure-sensitive, slow recovery	Low-speed dispensing, climate-controlled environment	Orthopedic products, sleep systems
Rigid PU Foam	30–200 kg/m³	Insulating, structural, closed-cell	High-pressure injection, precise metering	Construction, refrigeration, automotive
Anti-static PU Foam	20–60 kg/m³	ESD-safe, conductive, cushioning	Additive integration, ESD-safe processing	Electronics packaging, sensitive equipment

Expert Tip: When selecting a PU foam machine, ensure it is compatible with the specific resin system and additives of your foam type. For memory and anti-static foams, consider machines with temperature control and static-dissipative components to maintain material integrity and safety.

Durability and Maintenance of PU Foam Machines

Polyurethane (PU) foam machines are essential in industries ranging from insulation and furniture manufacturing to automotive and construction. Their durability and consistent performance rely heavily on proper maintenance practices. Regular upkeep not only extends the lifespan of critical components but also ensures consistent foam quality, reduces downtime, and prevents costly repairs. A well-maintained PU foam machine operates efficiently, delivers reliable output, and maintains chemical integrity during processing.

Core Maintenance Practices for Optimal Performance

Scheduled Inspections

Conducting weekly inspections is a proactive strategy to identify potential issues before they escalate into major failures. Focus on high-stress components such as the mixing head, metering pumps, heating elements, hoses, and electrical connections. Look for signs of wear, leaks, corrosion, or mechanical misalignment.

Early detection of problems—such as clogged nozzles, degraded seals, or inconsistent pressure readings—can prevent catastrophic breakdowns during production runs. Use a standardized inspection checklist to ensure consistency across shifts and operators. Document findings to track wear patterns and predict future maintenance needs.

Cleaning Procedures

Residual polyol and isocyanate buildup can harden inside the machine, leading to blockages, inaccurate metering, and compromised foam quality. Thorough cleaning after each production cycle or at the end of the workday is essential.

Utilize manufacturer-recommended cleaning agents or specialized purge compounds designed to dissolve uncured foam without damaging internal surfaces. For machines with dynamic mixing heads, perform flush cycles to clear reaction chambers. Regular cleaning preserves system hygiene, prevents cross-contamination between batches, and significantly reduces the risk of pump seizure or valve failure.

Lubrication Management

Moving parts such as pump gears, piston rods, and drive mechanisms require proper lubrication to minimize friction and prevent premature wear. Use only lubricants specified by the manufacturer, as incompatible oils can degrade seals or react with process chemicals.

Follow the lubrication schedule in the user manual, but adjust frequency based on operating intensity—machines running multiple shifts or under high-pressure conditions may need more frequent servicing. Over-lubrication should also be avoided, as excess grease can attract dust and contaminants, leading to sludge formation and reduced efficiency.

Timely Parts Replacement

Wear-prone components like seals, gaskets, nozzles, and check valves degrade over time due to constant exposure to reactive chemicals and high pressures. Delaying replacement can result in leaks, inconsistent foam density, or complete system failure.

Adhere to the manufacturer’s recommended replacement intervals, but also monitor performance indicators such as pressure fluctuations, spray pattern distortion, or increased cycle times. Replacing parts proactively—especially in critical areas like the mixing head and metering pumps—ensures uninterrupted operation and maintains product consistency.

Temperature Control & Monitoring

Polyurethane foam formation is highly sensitive to temperature. Both polyol and isocyanate components must be maintained within a precise temperature range (typically 18–30°C / 65–85°F) to ensure proper viscosity, mixing, and curing.

Regularly calibrate heating elements, thermostats, and temperature sensors to prevent overheating—which can degrade raw materials and damage internal components—or underheating, which leads to incomplete reactions and poor foam structure. Implement real-time monitoring systems where possible to alert operators of deviations.

Prevention of Abrasive Contamination

Introducing abrasive additives or particulate matter into the raw material stream can cause severe internal damage. Even fine particles can erode pump linings, scoring metal surfaces and compromising sealing integrity.

Always filter raw materials before loading them into the system and avoid using fillers or pigments that contain gritty or non-soluble components unless specifically approved for use with PU equipment. Maintaining clean, particle-free feedstock protects precision components and ensures long-term reliability and consistent foam output.

Maintenance Task	Recommended Frequency	Key Benefits
Visual Inspection	Weekly	Early fault detection, reduced downtime
System Cleaning	After each use / Daily	Prevents clogs, ensures consistent foam quality
Lubrication	Bi-weekly or per manual	Reduces wear, extends component life
Seal & Nozzle Replacement	Every 3–6 months (or as needed)	Prevents leaks, maintains spray accuracy
Temperature Calibration	Monthly	Ensures optimal chemical reaction and foam consistency

Best Practices Summary

Follow Manufacturer Guidelines: Always refer to the equipment manual for model-specific maintenance procedures, torque specifications, and compatible replacement parts.

Train Operators: Ensure all personnel are trained in basic maintenance tasks and can recognize early warning signs such as unusual noises, pressure drops, or inconsistent foam output.

Keep a Maintenance Log: Record all inspections, cleanings, lubrications, and part replacements to track machine health and support predictive maintenance strategies.

Use Genuine Components: OEM parts are engineered to match the original performance standards, reducing the risk of compatibility issues.

Implement Preventive Schedules: Automate reminders for routine tasks to avoid missed services and maintain continuous operational readiness.

Important: Neglecting maintenance can lead to irreversible damage, safety hazards, and voided warranties. Residual isocyanates are hazardous if released due to equipment failure. Always power down and depressurize the system before performing any maintenance. Regular care is an investment in safety, quality, and long-term cost savings.

Applications of PU Foam Machines Across Industries

Polyurethane (PU) foam machines are highly adaptable manufacturing systems that play a crucial role in producing lightweight, durable, and customizable foam materials. These machines utilize precise chemical mixing and dispensing technologies to create foams with tailored density, elasticity, and insulation properties. Their versatility makes them indispensable across a wide range of industries—from consumer goods to advanced industrial applications.

Upholstery Industry

PU foam machines are foundational in the furniture upholstery sector, where comfort, durability, and design flexibility are paramount. By precisely controlling foam density and expansion, manufacturers can produce custom-shaped cushions for sofas, armchairs, recliners, and office seating.

• Enables production of high-resilience (HR) foams for long-lasting support
• Supports complex molding for ergonomic and aesthetic designs
• Allows integration of variable firmness zones within a single piece
• Facilitates rapid prototyping and small-batch customization for boutique furniture makers

Innovation insight: Advanced machines support memory foam infusion for enhanced pressure relief in premium seating

Bedding Manufacturing

The mattress and pillow industry relies heavily on PU foam technology to meet growing consumer demand for personalized sleep solutions. PU foam machines enable layered construction using different foam types—each serving a specific functional purpose.

• Produce viscoelastic (memory) foam layers that respond to body heat and weight
• Create supportive high-density base layers for structural integrity
• Generate open-cell structures for improved airflow and temperature regulation
• Enable zoned support systems with varying firmness across the mattress

Market trend: Machines with multi-component dispensing allow hybrid mattresses combining memory foam, gel infusions, and latex-like properties

Automotive Sector

In automotive manufacturing, PU foam machines are essential for producing interior components that balance comfort, safety, and weight efficiency. The foam used must meet strict flammability, emissions, and durability standards.

• Manufacture molded seat cushions with optimized ergonomics and crash energy absorption
• Produce headliners and door panels with integrated sound-dampening properties
• Create lightweight structural foams that reduce overall vehicle weight
• Support automated in-line production for high-volume assembly lines

Technical requirement: Closed-loop metering systems ensure consistent foam quality for safety-critical components

Footwear Production

PU foam machines are widely used in footwear manufacturing to produce midsoles, insoles, and cushioned inserts that enhance comfort, shock absorption, and foot support.

• Enable precise control over foam density for athletic, orthopedic, or casual shoes
• Support injection molding directly into shoe lasts for perfect fit
• Produce lightweight soles that improve wearer mobility and reduce fatigue
• Allow integration of antimicrobial additives for hygiene-sensitive applications

Design advantage: Customizable cell structure enhances breathability and moisture management in performance footwear

Packaging Solutions

PU foam machines are instrumental in creating high-performance protective packaging for electronics, medical devices, aerospace components, and fragile goods. The foam’s shock-absorbing nature ensures product integrity during shipping and handling.

• Produce custom-fitted foam inserts that cradle irregularly shaped items
• Generate closed-cell foams resistant to moisture and compression
• Enable on-demand production of packaging for limited-run or high-value products
• Support reusable packaging systems with durable foam linings

Sustainability note: Some formulations offer recyclable or bio-based PU foams to reduce environmental impact

Industrial Applications

Beyond consumer products, PU foam machines serve critical roles in industrial and technical fields, particularly in insulation, sealing, and noise control. These applications often require foams with enhanced resistance to extreme conditions.

• Produce spray-applied insulation for pipelines, tanks, and building envelopes
• Create gaskets and seals resistant to oils, solvents, and temperature fluctuations
• Manufacture acoustic damping foams for machinery enclosures and HVAC systems
• Support aerospace applications with fire-retardant, low-smoke foams

Performance benefit: Rigid PU foams offer excellent thermal insulation (R-values up to 7 per inch), making them ideal for energy-efficient designs

Expert Insight: When selecting a PU foam machine for any application, consider not only the output capacity but also the precision of mixing ratios, temperature control, and programmable molding cycles. Machines with digital controls and recipe storage capabilities enhance repeatability and reduce waste—especially valuable in industries requiring strict quality compliance like automotive or medical packaging.

Industry	Primary Foam Type	Key Performance Requirements	Typical Density Range (kg/m³)
Upholstery	Flexible molded foam	Comfort, durability, resilience	30–80
Bedding	Viscoelastic / Memory foam	Pressure relief, temperature sensitivity	40–100
Automotive	High-resilience (HR) foam	Safety compliance, noise reduction	50–120
Footwear	Microcellular PU	Lightweight, cushioning, wear resistance	200–400
Packaging	Closed-cell rigid foam	Impact absorption, moisture resistance	80–200
Industrial	Rigid insulation foam	Thermal efficiency, chemical resistance	30–200

Additional Considerations for PU Foam Machine Selection

• Material Compatibility: Ensure the machine supports both polyester and polyether-based polyols depending on desired foam characteristics
• Mixing Technology: High-pressure impingement mixing offers superior homogeneity compared to low-pressure systems
• Environmental Controls: Climate-controlled dispensing environments improve foam consistency and reduce curing time
• Automation Integration: Robotic arms and conveyor systems enhance throughput in high-volume production settings
• Regulatory Compliance: Machines should support formulations meeting UL 94, FMVSS 302, or REACH/ROHS standards as required

PU Foam Machine Specifications: A Comprehensive Guide

Polyurethane (PU) foam machines are essential in manufacturing a wide range of foam products, from insulation panels and automotive seating to packaging materials and furniture. These machines precisely combine chemical components to produce consistent, high-quality foam. Understanding their key specifications is crucial for selecting the right equipment, optimizing production efficiency, and ensuring product reliability. This guide details the core components and technical features that define modern PU foam machinery.

Important Note: Proper handling of polyurethane chemicals requires strict safety protocols. Always wear chemical-resistant gloves, protective eyewear, and appropriate ventilation when operating or maintaining PU foam machines to prevent exposure to isocyanates and other hazardous substances.

Core Specifications of PU Foam Machines

• Reaction Vessels

  PU foam machines are equipped with dedicated reaction vessels where the primary chemical components—polyols and isocyanates—are combined to initiate the foaming reaction. These vessels are typically constructed from corrosion-resistant materials such as stainless steel to withstand prolonged chemical exposure. Most systems include mechanical stirrers or agitators that ensure thorough and uniform mixing, preventing premature curing or separation of components. Advanced models may feature jacketed vessels for integrated temperature control.

• Temperature Control Systems

  Precise temperature regulation is vital for consistent foam quality, as the polyurethane reaction is highly sensitive to thermal conditions. Modern PU foam machines include heating and cooling mechanisms—such as electric heaters, steam coils, or chilled glycol loops—to maintain the ideal temperature range (typically 20–40°C, depending on formulation). Automated sensors and PID controllers monitor and adjust temperatures in real time, minimizing batch variation and ensuring optimal reaction kinetics for uniform cell structure and density.

• Metering Accuracy

  The metering system is the heart of any PU foam machine, responsible for delivering precise ratios of polyol and isocyanate components. High-precision metering pumps—often piston or gear-type—ensure accurate volumetric or mass-based dispensing, typically within ±1% tolerance. This accuracy is critical for maintaining the correct stoichiometric balance, which directly affects foam hardness, density, curing time, and overall performance. Poor metering can lead to incomplete reactions, soft spots, or excessive waste.

• Mixing & Homogenization Technology

  After metering, components must be rapidly and thoroughly mixed to initiate uniform foam formation. This is achieved through high-efficiency mixing heads or dynamic nozzles that blend the chemicals under pressure. Static mixers, rotary impellers, or high-shear mixing chambers ensure complete homogenization, eliminating streaks or unmixed pockets. Consistent mixing results in foam with uniform cell structure, predictable expansion, and reliable physical properties across production batches.

• Pumping System

  Robust pumping systems are essential for transporting viscous polyurethane components from storage tanks to the mixing head. PU foam machines use high-pressure, positive-displacement pumps capable of handling varying viscosities and maintaining consistent flow rates. These systems must operate reliably under continuous use and resist wear from abrasive additives. Proper pump calibration ensures stable pressure delivery, which is crucial for accurate shot size and mold filling, especially in large-scale or high-speed applications.

• Molding & Curing Capabilities

  Many PU foam machines integrate with mold systems where the liquid mixture expands and cures into the final product shape. Molds may be heated or cooled to accelerate curing and improve dimensional stability. Features such as vacuum assistance, pressure clamping, and controlled ventilation help manage exothermic heat and moisture release during curing. Some machines include demolding automation or conveyor systems for continuous production, enhancing throughput and reducing manual labor.

• Automation & Control Systems

  Modern PU foam machines are typically equipped with advanced automation and digital control systems, often based on PLCs (Programmable Logic Controllers) or industrial PCs. These systems allow operators to program recipes, monitor real-time parameters (flow rate, temperature, pressure), and log production data. Touchscreen interfaces simplify operation, while safety interlocks prevent malfunctions. Automation improves repeatability, reduces human error, enhances workplace safety, and enables integration into Industry 4.0 manufacturing environments.

Specification	Function & Importance	Typical Performance Range	Key Components
Reaction Vessels	Contain and mix polyol and isocyanate components prior to dispensing	5L–500L capacity; stainless steel construction	Jacketed tanks, agitators, level sensors
Temperature Control	Ensures optimal reaction conditions for consistent foam quality	±1°C accuracy; 15–60°C operating range	Heaters, chillers, RTD sensors, PID controllers
Metering Accuracy	Maintains correct chemical ratios for reliable foam properties	±0.5% to ±1% precision	Piston pumps, mass flow meters, calibration systems
Mixing & Homogenization	Ensures complete blending for uniform foam structure	High-shear mixing at 1,000–3,000 RPM	Dynamic mixing heads, static mixers, nozzles
Pumping System	Transports viscous materials under controlled pressure	10–200 bar pressure; variable flow rates	Positive displacement pumps, pressure regulators
Molding & Curing	Shapes and solidifies foam into final product form	Heated molds (40–80°C); 5–30 min cure time	Mold clamps, heaters, ventilation systems
Automation & Control	Enables precise, repeatable, and safe operation	PLC or PC-based with HMI interface	Touchscreens, sensors, data logging, alarms

Expert Tip: Regular maintenance of metering pumps and mixing heads is essential for long-term performance. Clean nozzles after each shift and recalibrate metering systems monthly to prevent clogs, drift, and inconsistent output. Keeping detailed service logs helps predict wear and avoid unplanned downtime.

Additional Considerations for Optimal Performance

• Choose a machine with scalable capacity to accommodate future production increases
• Ensure compatibility with your specific foam formulations (e.g., flexible, rigid, or spray foam)
• Consider energy efficiency features such as heat recovery or variable frequency drives (VFDs)
• Verify compliance with environmental and safety standards (e.g., ISO, CE, OSHA)
• Invest in operator training to maximize equipment utilization and minimize errors
• Implement preventive maintenance schedules to extend machine lifespan

Selecting the right PU foam machine involves balancing technical specifications with production needs, material requirements, and budget constraints. By understanding these core components—from precise metering and temperature control to automation and curing systems—you can make informed decisions that enhance product quality, reduce waste, and improve operational efficiency. For critical applications, consult with equipment manufacturers to customize systems tailored to your specific foam chemistry and production goals.

Frequently Asked Questions About Polyurethane Foam Machines

Q1: What is the importance of the temperature control system in polyurethane foam machines?

The temperature control system plays a critical role in polyurethane foam machines by precisely regulating the heat of the raw materials—typically polyol and isocyanate—before and during mixing. Since the chemical reaction that forms polyurethane foam is highly sensitive to temperature, even minor fluctuations can impact foam quality.

• Reaction Stability: Optimal temperatures ensure a consistent and controlled exothermic reaction, preventing premature curing or incomplete foaming.
• Foam Density & Cell Structure: Proper temperature management leads to uniform cell formation, which directly affects the foam’s density, strength, and insulation properties.
• Production Efficiency: Stable temperatures reduce scrap rates and improve cycle times, enhancing overall manufacturing throughput.
• Material Compatibility: Some formulations require specific temperature ranges (typically between 20°C to 30°C) to achieve desired physical characteristics like softness, resilience, or load-bearing capacity.

Advanced systems often include digital controllers, heating/cooling jackets, and real-time monitoring to maintain precision across batches, ensuring consistent product quality in both lab and industrial settings.

Q2: Which are the common types of machines used to produce flexible PU foam?

Flexible polyurethane (PU) foam production relies on specialized equipment designed to mix, dispense, and cure foam precursors with high accuracy. The most commonly used machines include:

• High-Pressure Proportioning Machines: These systems use high-pressure impingement mixing to combine polyol and isocyanate components. They offer excellent blend consistency, minimal waste, and are ideal for high-volume production of molded or slabstock foams.
• Low-Pressure Proportioning Machines: Often used for smaller-scale operations or batch processing, these machines operate at lower pressures and are more cost-effective for applications requiring moderate output and simpler setups.
• Continuous Foaming Machines: Designed for slabstock foam production, these systems continuously pour foam onto a moving conveyor, where it rises and cures into large foam buns. They are widely used in mattress, furniture, and carpet underlay manufacturing due to their efficiency and scalability.

Each machine type can be customized with automation, metering controls, and safety features to meet specific formulation and production needs.

Q3: What materials are the polyurethane foam machine's components commonly constructed from?

Due to the aggressive chemical nature of polyurethane raw materials—especially isocyanates, which are highly reactive and corrosive—machine components must be made from durable, chemically resistant materials. Common construction materials include:

• Stainless Steel (e.g., 304 or 316): Widely used for pumps, mixing heads, tanks, and piping due to its excellent corrosion resistance and ease of cleaning.
• Titanium Alloys: Employed in high-wear or high-pressure areas where superior strength and resistance to chemical degradation are essential, such as in precision metering valves and nozzles.
• Specialty Plastics & Coatings: PTFE (Teflon), PEEK, and epoxy-lined surfaces are used in seals, gaskets, and internal linings to prevent material buildup and contamination.
• Hardened Tool Steels: Used in cutting and shaping components where mechanical durability is key.

These materials not only extend equipment lifespan but also ensure product purity and reduce maintenance downtime caused by clogs or corrosion.

Q4: What is the working principle behind flexible PU foam cutting machines?

Flexible polyurethane foam cutting machines utilize heated wire technology to slice through cured foam with precision and minimal resistance. The core working principle involves resistive heating of a thin metal wire, typically made of nichrome or stainless steel, which melts through the foam upon contact.

• Heated Wire Mechanism: An electric current passes through the wire, generating heat (usually between 200°C and 400°C), allowing it to cut cleanly without crushing or deforming the foam structure.
• Cutting Types:
  • Vertical Band Cutters: Use a continuous loop of heated wire for straight or contoured cuts in large foam blocks.
  • Horizontal Cutters: Employ a moving heated wire to slice foam buns into sheets of uniform thickness.
  • CNC Foam Cutters: Feature computer-controlled moving arms that guide the heated wire to produce complex 2D or 3D shapes with high repeatability.
• Advantages: Clean edges, minimal material waste, high-speed operation, and compatibility with various foam densities.

These machines are essential in downstream processing for industries such as bedding, automotive seating, packaging, and furniture.

Q5: What features make high-resilience (HR) foam stand out from other PU foams?

High-resilience (HR) foam is a premium category of flexible polyurethane foam known for its superior performance characteristics, making it a preferred choice in high-end seating, mattresses, and automotive interiors.

• Exceptional Elasticity: HR foam has a high rebound resilience (typically over 60%), meaning it quickly returns to its original shape after compression, providing a responsive and buoyant feel.
• Enhanced Durability: It maintains its physical properties over time, resisting permanent indentation (sagging) even after years of repeated use.
• Improved Comfort & Support: Offers a balanced combination of softness and firmness, conforming to body contours while providing strong support—ideal for ergonomic applications.
• Better Airflow: Features an open-cell structure that enhances breathability, reducing heat retention compared to conventional foams.
• Environmental & Safety Benefits: Many HR foams are formulated with reduced volatile organic compounds (VOCs) and meet flammability standards without relying on harmful flame retardants.

Produced using advanced formulations and often with modified polyols and additives, HR foam represents a significant upgrade over standard flexible foams in both performance and longevity.