JPH0257048B

PURPOSE:To obtain a sheet preventing damages from acarids living in houses, being laid under TATAMI (straw matting), by blending woody pulp fibers with synthetic fibers in a specific ratio to give a blend, processing the blend and specific fibers in a specific ratio into a mixed fiber sheet and applying an insecticide to the mixed fiber sheet. CONSTITUTION:Woody pulp fibers are blended with synthetic fibers such as vinylon, polyester, etc., in a ratio of 85:15-95:5 to give a blend. 100pts.wt. blend and 80-120pts. wt. olefinic hydrophilic pulpy branched fibers are processed into a mixed fiber sheet, which is coated or impregnated with an organic phosphorous insecticide, pyrethroid insecticide, organic chlorine insecticide or boric acid type insecticide. EFFECT:Even if water, etc., is spilt when the insecticidal sheet is laid under a carpet, etc., water is not permeated into a lower layer. The sheet has high water vapor permeability, so TATAMI or substrate plates will not corrode with moisture. The sheet can prevent reduction in performance caused by water absorption of heat insulating material when the sheet is used in outside walls and contamination of interior and keeps insecticidal performance for a long period.