| 摘要 |
Weather-resistant boards possessed of surface elasticity and pliancy by means of a permanently elastic, covering layer (for instance, particle boards, facade covering boards, and wall elements) and mouldings (for instance, containers, vessels, prefabricated building elements, and roof elements) of resin-impregnated wood fibres or other organic materials and inorganic materials, either as fibres or as particle materials are provided herein. Such weather resistant board comprises three layers. The first layer is an impregnatable, porous, base material which is constituted by a mixture of a curable resin with an organic base material, namely a lignocellulose fibrous or particle material, and an inorganic mineral fibrous material. The second layer is an outside elastic covering layer constituted by a vulcanized, weather-resistant resilient synthetic elastomeric material vulcanized thereon in situ at a temperature of at least 175 DEG C. The third layer is an intermediate layer constituted by the outer unvulcanized resilient synthetic elastomeric material being both adhered securely to one outer surface of the base material and penetrated and impregnated below and into the same surface of the base material to be within the porous structure of the base material and being vulcanized therein in situ at a temperature of at least 175 DEG C. The final product is an integral united material, in which the base and the coating material are impregnated one into the other within a facing area.
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