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Technical standards for WPC materials

As early as the early 1990s, the United States created a small plastic-wood production enterprise by improving the plastic-wood extrusion technology from Europe. The products are generally used in outdoor tables and chairs, park benches, plank boards, trash cans and other outdoor Support brackets used to withstand smaller loads, etc.

In July 1993, in order to formulate the test methods and specifications required for plastic wood products, the American Society for Testing and Materials (ASTM) established an ASTM sub-technical committee for processing recycled plastic wood materials and profiles, and determined that samples should be taken in the original natural state of the product. and performance testing of materials.

The verticality of the profile shall not exceed ±3.0 mm/m, accurate to 0.5mm/m;

Warpage shall not exceed 0.5%;

Edge straightness deviation shall not exceed 1.5mm/m.

Thickness range: 4-30mm.

Density: 0.5-1.30g/c m3.

Moisture content: less than or equal to 6.0%.

The 24-hour water absorption thickness expansion rate is less than or equal to 3.0%.

The 24-hour water absorption rate is less than or equal to 6.0%.

Impact toughness is greater than or equal to 10k J/m2.

Formaldehyde emission: E0≤0.3m g/L, E1≤0.5m g/L.

The tensile strength is greater than or equal to 9MPa.

Technical standards for WPC materials
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