In actual production, wood flour fiber size distribution, aspect ratio, density and other factors are important. PVC foam material in the production of wood, wood companies we jointly recognize that through trial and error: When choosing flour, selected after rigorous mechanical grinding of raw materials processed wood flour, fiber diameter distribution try to choose 40 to 120 purpose flour, wood flour according to the appropriate proportion of the fiber shape according to the shape of compounding. Particle size distribution curve so wide, and can absorb the impact of a larger area on the stress perpendicular energy; large pile of random fiber density, less impact energy absorption per unit area of ??the matrix resin;
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At the same time, such a combination is also higher melt index. Compared with the same industry, the production cost is greatly reduced, the market competitive advantages, product quality through the National Building Quality Supervision and Inspection Center as follows: water content of less than 0.9%, the dimensional stability of not more than 0.3%, Shore hardness (HD) is not less than 72, not more than the thickness swelling is not more than 0.3 percent formaldehyde emission 0.1mg / L soluble lead is not more than 15mg / kg, soluble cadmium less than 0.5mg / kg, soluble chromium less than 3mg / kg, soluble mercury less than 0.5mg / kg , the overall performance is excellent.
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?Molded plastic products are in a molten flow state, so materials processing requires a certain degree of liquidity. Liquidity is too small, extrusion molding difficult; and liquidity extrusion pressure is too large, too small to produce insufficient product strength and molding incomplete. Production practice shows, rheology wood raw material processing system for extrusion products, mechanical properties and have a relatively large impact.
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