Pardoseală SPC/LVT (Click, 100% Impermeabilă, 4mm–6.5mm)

Stratul de Uzură și Clasa AC: Ce Înseamnă de Fapt Specificația

The wear layer is the only structurally load-bearing surface of a vinyl plank floor. It is a transparent PU-coated PVC film that sits above the decorative print. Everything below it — the rigid SPC or WPC core, the attached underlay — is structurally irrelevant to surface durability. Chinese manufacturers quote wear layer thickness in millimeters or mils (1 mil = 0.0254mm). The two most common specifications are:

0.3mm (12mil) wear layer. Adequate for light residential use and hospitality guest rooms where foot traffic is below 1,000 cycles/day per unit area. EN 649 (homogeneous PVC) and ISO 10582 (heterogeneous PVC) test surface abrasion under Taber wheel methodology — AC3 is the minimum certification for residential heavy use (Group T, ≥4,000 revolutions on Taber test).

0.5mm (20mil) wear layer. The standard specification for commercial projects: retail stores, restaurants, office corridors, school hallways. AC4 certification is the commercial moderate-use threshold. Many European building contractors specify 0.5mm as a contractual floor for any commercial installation.

0.7mm (28mil) and above. Required for heavy commercial and industrial-adjacent applications: hospital corridors, airport terminals, industrial cleanrooms. AC5 rated. The price premium vs 0.5mm is approximately 25–35% at the factory level, driven entirely by PVC resin cost.

Do not accept “wear layer included” without a millimeter specification in the purchase contract. Some Chinese factories quote a total product thickness that includes the integral foam underlay — a 6mm product with 1.5mm underlay and 0.2mm wear layer is not a 0.5mm wear-layer product. Request a cross-section diagram in the sample approval documentation.

Miez SPC vs WPC: Când Este Fiecare Specificația Corectă

Both SPC (Stone Polymer Composite) and WPC (Wood Polymer Composite) use PVC resin as the polymer matrix. The filler determines the core’s physical behavior.

SPC core (limestone powder filler, 40–65% by weight). High density (typically 1.9–2.1 g/cm³), rigid, dimensionally stable under temperature variation. Thermal expansion coefficient approximately 0.04mm/m/°C — far lower than WPC. Suitable for underfloor heating (UFH) systems operating up to 27°C surface temperature. SPC is the dominant specification for European commercial and residential projects with UFH. Thinner profile (4–5mm total) means less impact on door clearances during renovation.

WPC core (wood flour filler). Lower density (0.9–1.1 g/cm³), higher thermal insulation (better underfoot comfort), integral foam backing more common. More susceptible to thermal expansion — not recommended for UFH or large open-plan spaces with significant temperature swings (>15°C delta). Better acoustic performance without additional underlay.

The practical sourcing decision: For EU and North American commercial and renovation projects, specify SPC. For residential projects where acoustic comfort and underfoot warmth are priorities and UFH is not installed, WPC remains a valid choice. Confirm with the factory whether the “rigid core” product they quote is SPC or WPC — some manufacturers market WPC as “rigid core LVT” which is technically accurate but creates buyer confusion.

Clasa de Emisie de Formaldehidă: Ce Necesită Fiecare Piață

Formaldehyde emission from the adhesive binders in the print film and backing is regulated differently across markets. Specifying the wrong class either fails market access or wastes money on unnecessary certification.

CARB2 Phase 2 (California Air Resources Board). The de facto US market standard for composite wood products and vinyl flooring sold in California — and practically adopted nationwide because of California’s market size. Threshold: ≤0.05 ppm formaldehyde off-gassing under ATCM 93120.2. Tested per ASTM E1333 large chamber method. Any vinyl flooring sold in the US should be CARB2 certified. Ask for the CARB2 certificate from an accredited third-party lab (SCS Global, GREENGUARD, UL Environment), not a self-declaration.

E1 (European standard, EN 13986 / EN 717-1). Threshold: ≤0.124 mg/m³ (≈0.1 ppm) measured by chamber method. CE marking for flooring in the EU requires E1 classification. Note: E0 (≤0.062 mg/m³) is increasingly specified by European public building projects (schools, hospitals) — confirm with the end customer if E0 is required before finalizing the BOM.

F☆☆☆☆ (Japan, JIS A 5905 / JIS A 1460). Four-star is the most stringent Japanese classification, threshold ≤0.02 mg/m³ — significantly lower than CARB2 or E1. Required for residential construction in Japan under the Building Standards Law Article 28-2. Not required for European or US markets — do not pay the premium if the product targets EU/US buyers only.

Tip for multi-market sourcing: CARB2-certified product is compliant with the E1 threshold in practice (CARB2’s 0.05 ppm ≈ E1’s 0.1 ppm — CARB2 is stricter). A product with a valid CARB2 certificate from an accredited lab satisfies EU E1 requirements. Specify CARB2 for any product destined for both US and EU markets to avoid duplicating testing costs.

Sistemul de Blocare, Planeitatea și Punctele de Inspecție înainte de Expediere

The mechanical locking profile is injection-molded into the SPC core during extrusion. Quality variances in locking angle and tongue thickness accumulate to installation failures: boards that separate at joints under thermal cycling, or locking tabs that fracture during installation.

Unilin and Välinge 5G. Both are licensed locking geometries — Unilin Bvba (Belgium) and Välinge Innovation (Sweden) license their 5G and Loc systems to Chinese manufacturers. A factory with a valid Unilin or Välinge license has passed the geometry QA program. A factory producing unlicensed “click lock” profiles may have adequate geometry, but the buyer has no independent verification — joint gap and locking force are not covered by any Chinese national standard.

Pre-shipment inspection checkpoints:

• Flatness (EN ISO 24346): Maximum bow or curl of 0.75mm over a 500mm span after 6 hours at 23°C acclimatization. Chinese factories frequently store finished goods in unheated warehouses — boards bowed from thermal shock may not recover. Include acclimatization testing in the inspection scope.
• Thickness uniformity: Measure total thickness at five points per plank — core extrusion variance of ±0.2mm is acceptable; beyond that, the locking geometry tolerance stack-up causes installation gaps.
• Formaldehyde: Spot-check production-batch certificates against the sample-approval certificate. CARB2 certification is per formula/production site — a factory that qualifies one adhesive formulation and switches suppliers mid-production loses compliance.

Our inspection service includes dimensional, formaldehyde, and locking-system checks for flooring products as a standard pre-shipment item.