| 摘要 |
The invention relates to a first gypsum-based composite article reinforced with glass fibers. This first article has a first member made of a hard gypsum, a second member made of a soft gypsum, and a mat made of the glass fibers. The mat is embedded in the article in a manner that the first and second members are bonded together by means of the mat. This first article is superior in resistance to external force acting thereon and to severe environmental conditions, even if the gypsum-based article is light in weight and thin in thickness. The invention further relates to a second gypsum-based composite article having a base plate, a glass fiber mat bonded to the base plate, and a gypsum layer formed on the glass fiber mat such that glass fibers of the glass fiber mat are embedded in the gypsum layer. This second article also has superior characteristics as those of the first article. The invention still further relates a third gypsum-based composite article having a first gypsum layer made of a first gypsum, a second gypsum layer made of a second gypsum, and a third layer made of electromagnetic wave shielding fibers. The third layer is interposed between and bonded to the first and second gypsum layers and is made in the form of a mesh. This third article also has superior characteristics as those of the first article, in addition to electromagnetic wave shielding capability.
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