Meanwhile, the mechanical properties of plant fiber cement-based composite materials have been effectively improved through treating the surface of plant fiber by urea-formaldehyde resin.

同时采用脲醛树脂对植物纤维进行表面处理，有效地改善了复合材料的物理性能。

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High density door: the material is wooden fiber or other plant fiber, and the synthetic door is made by the applied urea-formaldehyde resin or other applicable adhesive.

高密度门：是以木质纤维或其他植物纤维为原料，施加脲醛树脂或其他适用的胶粘剂制成的人造板材门。

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