PVC Foam Board _OTHER PLASTIC PRODUCTS-Hansa seal

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PVC Foam Board

PVC Foam Board Professional Profile

Material Definition

PVC foam board is a板材 formed from polyvinyl chloride (PVC) resin as the base matrix, utilizing chemical blowing agents as the pore-forming functional unit. It incorporates a comprehensive additive system including stabilizers, processing aids (ACR), blowing modifiers, fillers, and lubricants. The material is produced via high-temperature extrusion foaming, resulting in a honeycomb-like microcellular structure. Commercially known as Forex board, Sintra board, or Celtec board, it is primarily categorized into two main types based on surface morphology and forming mechanism:

1. Free Foam Board: The material expands freely upon exiting the die orifice, creating a fine matte surface (no skin) with uniform, open cells. Produced using standard foaming dies with relatively simple process control, its surface exhibits strong adhesion to inks and adhesives, making it ideal for secondary processing such as printing and lamination.

2. Celuka / Co-extruded Foam Board (Controlled Foam/Skin): Manufactured using the Celuka method or constrained foaming processes, a dense, smooth outer skin is formed through rapid cooling at the die exit, while the core remains cellular. This type features high surface hardness, scratch resistance, superior mechanical properties, and precise thickness tolerances, suitable for applications requiring high aesthetics like furniture and cabinetry.

Primary Production Methods

Produced via continuous extrusion using twin-screw extruders (with 80 conical twin-screw being mainstream). Core process: Batching → High-speed hot mixing (115-125°C) → Cooling mixing (below 50°C) → Extrusion plasticization → Die forming → Calibration cooling → Haul-off cutting. Celuka foaming requires specialized calibrators and rapid cooling systems; free foaming relies on die-lip pressure release as the primary expansion driver.

Core Performance Advantages

1. Lightweight & High Strength, Wood Replacement

- Density: 0.35-0.8 g/cm³, 1/2 to 1/3 that of wood, significantly reducing structural weight.

- Tensile Strength: 12-20 MPa; Flexural Strength: 12-18 MPa; Impact Strength: 8-15 KJ/m². Mechanical properties approach or exceed solid wood with isotropic characteristics.

2. All-Weather Weatherability & Chemical Resistance

- Resistant to acids, alkalis, and salt spray; inert towards most chemical media. Ideal for anti-corrosion structures in chemical plants and high-salinity coastal environments.

- Vicat Softening Point: 73-76°C; Long-term service temperature: -50°C to 70°C. UV-stabilized formulations ensure long-lasting color retention with service life expectancy of 40-50 years.

3. Inherent Flame Retardancy & Self-Extinguishing

- Limiting Oxygen Index (LOI) ≥ 35; Self-extinguishing time < 5 seconds. Compliant with GB 8624-2012 Class B1 (difficult flammability), offering superior fire safety compared to wood and standard plastics.

- No molten drips during combustion; low smoke toxicity, suitable for public spaces and transportation interiors.

4. Full Water Environment Adaptability & Dimensional Stability

- Water absorption ≤ 1.5%; completely non-hygroscopic, does not rot, deform, or support mold growth even with prolonged immersion.

- No warping or cracking in humid/hot environments; dimensional stability far exceeds solid wood and engineered wood products.

5. Zero Biodeterioration & Environmental Hygiene

- Completely resistant to insects and termites; no need for anti-fungal treatments. Meets food-contact safety standards (ROHS certified), non-toxic and odorless.

- 100% recyclable; production waste can be granulated and re-introduced into the manufacturing process. Environmentally friendly material.

6. Thermoformability & Secondary Processing Ease

- Can be sawn, planed, nailed, drilled, glued, milled, and carved using standard woodworking tools; no specialized equipment required.

- Can be bent, folded, and vacuum-formed upon heating; weldable (using PVC专用焊枪); printable, paintable, and laminable, offering significant design flexibility.

Material Types & Specification System

Type	Structural Characteristics	Density Range (g/cm³)	Common Thickness (mm)	Standard Sheet Size (mm)	Core Process	Typical Applications
Free Foam Board	Matte surface, no skin, open cells	0.35 - 0.70	1 - 25	1220×2440 / 1560×3050 / 2050×3050	Free Foam Extrusion	Advertising displays, screen printing, mounting, signage, lightboxes
Celuka Foam Board	Dense smooth skin, cellular core	0.55 - 0.80	2 - 30	1220×2440 / Customizable	Celuka Extrusion + Quenching	Bathroom cabinets, kitchen doors, furniture, partitions, marine interiors
High-Density Foam Board	Low expansion ratio, near-solid	0.70 - 0.90	3 - 20	1220×2440 / Customizable	Low-Foam Extrusion	Chemical anti-corrosion liners, structural pads, jigs
Flame Retardant Reinforced Board	High loading of flame retardants	0.60 - 0.85	3 - 25	1220×2440	FR Additive Extrusion	Public works, rail transport, marine cabin interiors

Technical Parameters & Performance Indicators

Property	Free Foam Board (Typical)	Celuka Board (Typical)	Standard/Reference
Density (g/cm³)	0.50 - 0.70	0.55 - 0.80	GB/T 6343
Tensile Strength (MPa)	12 - 18	15 - 22	GB/T 1040
Flexural Strength (MPa)	12 - 16	16 - 22	GB/T 9341
Flexural Modulus (MPa)	800 - 900	900 - 1200	GB/T 9341
Impact Strength (KJ/m²)	8 - 15	15 - 25	GB/T 1043
Elongation at Break (%)	15 - 20	10 - 15	GB/T 1040
Shore Hardness (D)	45 - 55	65 - 75	GB/T 2411
Vicat Softening Point (℃)	73 - 78	75 - 80	GB/T 1633
Water Absorption (%)	≤ 1.5	≤ 1.2	GB/T 1034
Limiting Oxygen Index (%)	≥ 35	≥ 35	GB/T 2406
Horizontal Burning	HB Class	HB Class	UL 94
Thermal Conductivity (W/m·K)	0.07 - 0.10	0.08 - 0.12	GB/T 10295

Typical Application Fields

Application Sector	Specific Uses	Recommended Type	Key Requirements
Advertising & Signage	Screen printing, digital cutting, display boards, signboards, lightboxes, mounting panels	Free Foam Board	Matte surface for ink adhesion, tight thickness tolerance, large sheet size
Furniture & Sanitary	Bathroom cabinets, kitchen door panels, office furniture, interior partitions	Celuka Foam Board	High surface hardness, scratch resistance, waterproof, dimensional stability
Architectural Decoration	Exterior cladding, ceiling panels, cleanroom partitions, commercial displays	Celuka/Free Foam Board	Class B1 flame retardancy, weatherability, wood-like aesthetics
Transportation	Train/bus ceiling panels, ship cabin interiors, sandwich panel cores	FR Reinforced/Celuka Board	Lightweight, high strength, low smoke, flame retardant, salt-spray resistant
Chemical Anti-Corrosion	Electroplating tank liners, acid-wash line enclosures, storage tank platforms	High-Density Foam Board	Chemical resistance, non-absorbent, electrical insulation
General Industrial & Civil	Sports equipment, aquaculture, coastal moisture barriers, model making	Standard Foam Board	Easy machinability, lightweight, water resistance

Processing, Joining & Installation Guide

1. Machining

- Sawing: Use fine-toothed circular or band saws; carbide-tipped blades (3-5mm tooth pitch) recommended. Coolant not required.

- Drilling: Standard woodworking twist drills or HSS bits (118° point angle). Back-up support necessary to prevent edge chipping.

- Routing/CNC: Single-flute spiral up-cut bits recommended. Speeds: 12,000-18,000 RPM; Feed rate: 4-8 m/min. Use compressed air for chip removal.

- Punching: High-volume small parts can be die-cut; die clearance approximately 5% of sheet thickness.

2. Joining & Assembly

- Mechanical Fastening: Self-tapping screws or wood screws can be driven directly; pre-drilling (slightly undersized) recommended. Mortise and tenon or locking joints feasible.

- Adhesive Bonding: PVC adhesives, chloroprene rubber (contact) adhesives, or polyurethane structural adhesives. Double-sided tape suitable for temporary fixing.

- Hot Gas Welding: Use PVC filler rod and hot air gun (250-350°C) for corner or butt welding; weld strength可达80% of base material.

- Thermoforming: Heat to 120-160°C (oven or infrared). Sheet softens and can be vacuum formed or free-bent over molds; retains shape upon cooling.

3. Surface Finishing

- Printing: Screen printing, UV flatbed printing, heat transfer. Free foam board's matte surface requires no pretreatment; excellent adhesion.

- Lamination: Pre-applied PVC decorative film, wood grain film, high-gloss film applied via vacuum pressing or roller laminator.

- Painting: Acrylic or polyurethane primer + topcoat systems recommended. Sanding of substrate typically not required.

Selection Decision Matrix

Application Scenario	Primary Performance Requirement	Recommended Product Type	Critical Considerations
Outdoor Advertising Signage	Weatherability, UV stability	Free Foam Board (UV-stabilized)	Verify UV absorber additive; Thickness ≥ 5mm
Bathroom/Kitchen Cabinet Doors	High surface hardness, water/chemical resistance	Celuka Foam Board	Surface hardness ≥ Shore D65; PVC film wrapping recommended
Chemical Plant Partitions	Corrosion resistance, flame retardancy, cleanability	High-Density Celuka Board	Density ≥ 0.7 g/cm³; Welded seam sealing
Marine/Rail Interiors	Low smoke, flame retardancy, light weight	FR Reinforced Foam Board	LOI ≥ 35; Smoke density rating ≤ 75
Interior Decorative Moldings	Machining precision, wood-like feel	Celuka Foam Profile	Account for thermal expansion coefficient
Low-Cost General Purpose Pads	Economy, easy replacement	Free Foam Board	Control filler content to prevent embrittlement

Industry Customized Solutions

Rail Transit Interior Systems

Requirement: Ceiling panels, wall panels, floors for EMUs/subways. Density < 0.8 g/cm³, EN45545 HL3 flame retardancy, low smoke, non-toxic.

Solution: High FR Celuka PVC foam board. LOI ≥ 42, smoke density < 200. Surface laminated with scratch-resistant decorative film.

Application: Toilet units, luggage rack side panels for China Standard EMUs (Fuxing).

Semiconductor Wet Process Anti-Corrosion Structures

Requirement: Enclosures for wafer cleaning baths, protective covers for acid/alkali supply systems. Resistant to strong acids/bases, no metallic ion leaching.

Solution: High-purity PVC Celuka foam board. Welded construction; all exposed corners thermoformed with radii.

Application: Auxiliary facilities in wet etch areas of 12-inch wafer fabs.

Cold Chain Logistics Insulated Containers

Requirement: Vaccine/biologics transport boxes. Superior insulation, light weight, reusable.

Solution: PVC foam board laminated with aluminum foil. Thermal conductivity ≤ 0.08 W/m·K. Corners welded sealed.

Application: Medical cold chain totes, internal partitions for mobile nucleic acid testing units.

Marine Aquaculture Facilities

Requirement: Walkways for deep-sea net pen platforms, float covers. Long-term seawater immersion, biofouling resistance.

Solution: High-density free foam board. Zero water absorption. Smooth surface inhibits barnacle attachment.

Application: Deck boxes for offshore farming vessels, auxiliary float components for anti-storm net pens.

Storage & Maintenance

Storage Conditions

Environment: Indoor storage. Avoid prolonged outdoor exposure to sun/rain. Warehouse should be dry, ventilated; relative humidity < 70%.

Stacking: Store flat on level pallets or skids. Stack height ≤ 1 meter. Avoid localized heavy loading causing permanent deformation. Cut parts should be stored vertically or flat in single layers.

Shelf Life: Follow FIFO. For stock > 2 years,建议 retest impact strength and Vicat softening point. UV-stabilized grades can achieve 10+ years outdoor service life.

In-Service Maintenance

Cleaning: Routine stains: neutral detergent + soft cloth. Ink residue: isopropyl alcohol or专用 cleaners. Avoid strong acids, alkalis, or abrasive cleaners.

Repair: Superficial scratches on Celuka boards can be cautiously wet-sanded (fine grit) or lightly heat-gunned. Deep gouges: filler repair or full replacement recommended.

Aging Inspection: Outdoor installations: inspect every 2 years for surface chalking, discoloration, impact strength degradation. Replace upon embrittlement, severe yellowing, or surface cracking.

Joint Maintenance: Mechanical fasteners:建议 annual re-torquing. Adhesive bonds: avoid prolonged contact with aggressive solvents.

Development Trends

Technical Development Directions

Ultra-Low Density: Pursuing density < 0.3 g/cm³ via advanced blowing modifier blends and process optimization for ultra-light, rigid boards, targeting substitution of certain EPE/PU foams.

Surface Functionalization: Development of in-line lamination, co-extruded colored cap layers, anti-fingerprint/antibacterial/self-cleaning surfaces to enhance value of pre-finished boards.

Bio-based & Circular Economy: Research into bio-based PVC (e.g., bio-ethylene feedstock), fully recyclable formulations; establishing high-value regeneration technologies for post-industrial/post-consumer foam board waste.

Functional Composites: Incorporating functional fillers (conductive, anti-static, EMI shielding, phase-change materials) into foaming systems, evolving towards engineered functional panels.

Market Application Expansion

Prefabricated Building Interiors: Integrated kitchens/bathrooms, rapid-install partition systems using PVC foam board as substrate to replace plywood, eliminating formaldehyde concerns.

New Energy Equipment: Packaging support pads for PV modules, anti-corrosion liners for energy storage cabinets, wind turbine blade transport fixtures.

Outdoor Landscape & Architecture: Wood-Plastic Composite (WPC) foam boards, combining wood-like aesthetics with complete waterproofing.

Medical Grade Panels: Antimicrobial/anti-fungal formulations, gamma radiation resistant grades for CT scanner rooms, operating theatre wall cladding.

Conclusion

PVC foam board, through its material design logic of "plastic matrix providing weatherability & corrosion resistance + microcellular structure providing light weight & insulation," has become one of the most commercially successful materials in the "plastic replacing wood" movement. From advertising signage to high-speed rail interiors, from chemical anti-corrosion to medical cold chain, its superior service life in harsh environments and low lifecycle cost drive continuous substitution of wood, metal, and traditional composite panels. As China has become the world's largest producer and consumer of rigid PVC foam products (exceeding 1.1 million tons capacity in 2017), the industry is transitioning from volume expansion to technological upgrading—evolving towards ultra-low density, advanced surfaces, and multifunctional integration. Driven by carbon neutrality goals and green building material policies, PVC foam board is upgrading from a general decorative material to a foundational functional material for emerging sectors including prefabricated construction, new energy equipment, and modern logistics.

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Publisher：Hansa seal Pubtime：2026-02-13 13:07:00 Close