In modern architectural cladding, interior decorating, and outdoor eco-building engineering, the demand for Doghe in WPC (Wood Plastic Composite staves/slats) has grown rapidly across European, North American, and Middle Eastern markets. As global commercial developers, wholesalers, and general contractors seek durable, low-maintenance, and eco-certified alternatives to solid timber staves, China has emerged as the premier manufacturing epicenter for high-precision WPC profiles, acoustic wood slat systems, SPC rigid flooring, and multi-functional composite wall coverings.
This technical whitepaper examines the core manufacturing capabilities, polymer material science, structural engineering advantages, and supply-chain logistics that define leading Chinese facilities. By analyzing structural extrusion parameters, polymer chemistry (HDPE/PVC combined with micro-milled bamboo fibers), surface UV treatments, and acoustic dampening ratings, procurement professionals can effectively evaluate vendor capabilities and optimize their global architectural sourcing strategies.
Linyi Rich New Materials Co., Ltd. is a professional modernized industrial and trading company, integrating research & development, production, and sales, dedicated to the manufacturing and innovation of new environmentally friendly building materials. Headquartered in Linyi City, Shandong Province—China’s primary logistics and wood processing hub—the company operates an intelligent production base covering over 100,000 square meters and employs over 300 professional technicians. With its industry-leading extrusion scale and exceptional product quality control, the company has established itself as a major premier supplier in the international eco-building materials sector.
Professional Technicians & Engineers
Square Meters Intelligent Base
Automated WPC Grating / Doghe Lines
Customized Outdoor WPC Lines
Our intelligent factory floor integrates multi-axis automatic feeding systems, twin-screw co-extruders, precision calibration tables, and online continuous UV-coating machinery to manufacture high-performance building profiles:
Supported by 120 fully automated production lines yielding an annual output of approximately 12 million square meters. These WPC staves/slats blend wood aesthetics with thermoplastic durability, featuring zero warping, moisture resistance, and termite-proof performance for interior wall cladding and architectural partitions.
Utilizing 4 high-precision continuous extrusion lines with an annual capacity of 3 million square meters. Formulated with stone-plastic composite cores (CaCO3 + PVC resin), offering 100% waterproof protection, high abrasion resistance, dimensional stability, and zero formaldehyde emissions for residential and heavy commercial projects.
Features 40 customized heavy-duty co-extrusion lines producing roughly 2 million square meters annually. Specifically engineered with anti-UV additives, antioxidant complexes, and capped co-extrusion shells to withstand harsh climate swings (-40°C to +60°C), UV degradation, and salt spray corrosion in North America, Europe, and coastal regions.
Equipped with 12 customized coating lines backed by multiple dust-free cleanrooms, reaching an annual production capacity of 6 million square meters. Offers high-gloss stone/marble textures, scratch-resistant topcoats, and rapid installation capability for luxury hotels, healthcare centers, and retail spaces.
Operating 6 advanced production lines with an annual output of about 1 million square meters. Fitted with state-of-the-art engraving and routing equipment, enabling customizable V-grooves, structural folding, high flexural strength, and ultra-lightweight installation profiles.
Incorporating sound-absorbing recycled PET felt substrate with real wood veneer or WPC slat staves (Doghe). Customized CNC engraving machines allow bespoke slat widths, depths, and spacing to meet target Noise Reduction Coefficients (NRC ratings up to 0.85).
Utilizes 6 high-precision polystyrene extrusion lines with 200+ dedicated mold profiles alongside flexible soft ceramic/stone veneer lines. Delivers lightweight, hydrophobic architectural accents for internal feature walls and exterior facade cladding upgrades.
To assist architectural specification writers, structural engineers, and commercial buyers, the following table details the physical and mechanical performance indicators of our industrial WPC profiles:
| Material Parameter | Testing Standard | WPC Interior Doghe / Slats | Outdoor Co-Extruded WPC |
|---|---|---|---|
| Density (g/cm³) | ASTM D792 | 1.25 – 1.35 g/cm³ | 1.35 – 1.42 g/cm³ |
| Flexural Modulus | ASTM D790 / EN 310 | ≥ 2500 MPa | ≥ 3200 MPa |
| Water Absorption (24h) | ASTM D570 / EN 317 | < 0.5% (Non-hygroscopic) | < 0.1% (Submersible) |
| Fire Reaction Rating | EN 13501-1 / ASTM E84 | B-s1, d0 (Flame Retardant) | B-s1, d0 / Class A |
| Formaldehyde Emission | EN 717-1 | E0 Grade / Non-detectable | E0 Grade / Zero Emission |
| Thermal Expansion Coeff. | ISO 11359-2 | 3.5 x 10^-5 /°C | 2.8 x 10^-5 /°C |
| UV Resistance (1000h QUV) | ISO 4892-2 | Gray Scale ≥ 4.0 | Gray Scale ≥ 4.5 (Capped Layer) |
Why do leading international importers, project contractors, and regional building distributors select Chinese WPC extrusion manufacturers for their supply chain? The advantages extend beyond simple cost efficiency to encompass end-to-end industrial integration:
Linyi is recognized worldwide as the hardwood plywood and wood flour processing capital of Asia. This proximity grants direct access to ultra-fine, low-moisture bamboo and wood fiber bio-powders. Combined with domestic virgin PVC resin supply lines, our raw material formulation costs are optimized while maintaining strict raw-material purity.
With 120 dedicated interior WPC grating lines and 40 outdoor WPC co-extrusion lines running 24/7, our production scale handles large commercial container orders with minimal lead times. Scale operations drastically reduce tooling setup costs for custom OEM Doghe profiles.
Our facilities employ second and third-generation capped co-extrusion techniques. A 360-degree protective fluoropolymer composite shield encapsulates the core matrix, preventing oil staining, moisture intrusion, color fading, and physical scratch damage in heavy-traffic environments.
As international building codes place greater emphasis on decarbonization, Life Cycle Assessment (LCA) compliance, and indoor air quality (IAQ), the WPC manufacturing sector is undergoing several transformative shifts:
Modern interior designs increasingly combine visual slatted aesthetics with acoustic control. Pre-assembled acoustic wood slat panels (WPC Doghe backing on recycled acoustic felt) allow fast installation while achieving sound absorption coefficients tailored to offices, recording studios, and hotel lobbies.
Leading factories are moving toward 100% recycled industrial polymers paired with agricultural wood flour waste. This circular manufacturing cycle significantly reduces embodied carbon compared to traditional aluminum or pure virgin PVC cladding profiles.
Advancements in synchronized online pressing allow deep wood-grain embossing directly onto extruded WPC profiles. This eliminates the artificial look of early generation plastic composites, offering the warmth and tactile feel of natural teak, walnut, or oak without the maintenance requirements.
WPC Doghe, acoustic wall panels, and stone-composite sheets provide versatile architectural solutions across diverse global sectors:
Engineered for resort boardwalks, hotel swimming pool decks, and public park walkways requiring high slip resistance (R11 standard) and resistance to rotting or warping under harsh sun and rain exposure.
WPC Doghe slats provide clean, vertical relief lines for hotel reception backdrops, living room TV feature walls, and executive corridor wall paneling, hiding surface imperfections while elevating spatial aesthetics.
Co-extruded exterior WPC cladding serves as a lightweight ventilating rainscreen facade. It reduces thermal bridging, shields underlying structure walls, and improves exterior building insulation.
Procuring large volume WPC architectural goods directly from Chinese factories requires standardized quality control steps and logistically sound shipping protocols:
Our tool and die department can produce custom Doghe slat geometry, interlocking tongue-and-groove connections, or hollow/solid profile configurations. Custom mold production typically takes 7 to 12 days, complete with sample extrusion testing prior to full production runs.
Color consistency between manufacturing batches is maintained using spectrophotometer color testing. Customer master-batch requirements can be matched to precise RAL or Pantone standards, followed by accelerated weatherometer testing for outdoor lines.
Extruded WPC profiles are packed in reinforced protective PE shrink film, edge corner protectors, and heavy-duty fumigated wooden pallets or custom steel crates to ensure damage-free sea freight transport across long shipping routes.
Explore our complete manufacturing lines encompassing WPC Wall Panels, UV Marble Sheets, Outdoor WPC Decking, SPC Flooring, Bamboo Charcoal Wood Veneers, Acoustic Panels, PS Wall Panels, and PVC Ceilings:
"Doghe" is the international/Italian engineering term for slats, staves, or grooved wood profiles. In WPC manufacturing, "Doghe WPC" refers to extruded wood-plastic composite staves used for modern slatted wall cladding, acoustic ceiling baffles, linear exterior facades, and decorative partitions.
We utilize fully automated gravimetric feeding systems for polymer resins and wood fiber masterbatches. Every production batch undergoes automated spectrophotometric testing against the target ΔE (Delta E) tolerance limit (ΔE < 0.8), ensuring batch-to-batch visual uniformity across multi-container orders.
Indoor WPC profiles typically utilize PVC or light PE matrices focused on low weight, high fire retardancy (B-s1, d0), and aesthetic surface foiling. Outdoor WPC profiles feature high-density PE (HDPE) combined with 360-degree co-extrusion capped polymer shells, UV inhibitors, and antioxidants designed to resist weathering, standing water, and thermal expansion.
Yes. All products manufactured by Linyi Rich New Materials Co., Ltd. comply with ISO9001 quality management, CE mark requirements, REACH heavy metal restrictions, and formaldehyde emission limits (E0 grade / EN 717-1 standard).
For standard stock profile shapes and colors, our standard MOQ starts at 500 square meters. For custom engineered tooling or unique OEM colors, MOQ is typically one 20-foot container (approx. 1,500 - 2,000 sqm), with production lead times ranging from 14 to 21 days.
Rich New Materials
