and therefore impact performance of high strength, toughness, fatigue cycle, thermal stability and other aspects have improved significantly, and there is the cell density of the material Save small. Therefore, wood fiber composite material is porous foam can overcome the shortcomings of the physical and mechanical properties,
Microporous foamed material, the cell density of 109 ~ 1015 / cm3, the cell diameter 0.1 ~ 10.0Lm, which cell size is much smaller than traditional foam. These small bubbles can effectively prevent the material from the original crack extended, so that the crack tip blunting,
etc., and improve the properties of the material to a large extent. For example, Langfang Municipal Gimhae Dragon WPC Technology Co., Ltd. successfully developed micro foamed PVC / Wood Flour Composites: in the production of pure PVC microcellular foam material,
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