| 摘要 |
Weather-resistant boards are provided herein which are possessed of surface elasticity and pliancy by means of a permanently elastic, covering layer (for example, particle boards, facade covering boards, and wall elements) and mouldings (for instance, containers, vessels, prefabricated building elements, and roof elements), the base material being lignocellulose or other organic materials and/or inorganic materials, either as fibres or as particle materials. Such weather resistant boards consist of three layers. The first layer is an impregnatable porous, base material as defined above. The second layer is a vulcanized outer covering layer constituted by an vulcanized, weather-resistant resilient synthetic elastomeric material which has been vulcanized therein in situ at a temperature of at least 175 DEG C. The third layer is the outer originally unvulcanized resilient synthetic elastomeric material, which is penetrated and impregnated below and into the same outer surface of the base material to be within the porous structure of the base material for only a predetermined limited region in the vicinity of the outer surface of the base material and being vulcanized therein in situ at a temperature of at least 175 DEG C. The board 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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