초록

A process for preparing an antifogged sheet comprising a propylene resin sheet with an antifogging agent comprising a polyglycerol fatty acid ester or a sucrose fatty acid ester as an effective ingredient.

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[ What is claimed is:] [1.]1. A process for preparing a propylene resin sheet for thermoforming which comprises subjecting a propylene resin laminated sheet which comprises an intermediate layer of a propylene resin having a density of 0.900 g/cm.sup.3 or less and a melt flow rate in the range of 0.

[ What is claimed is:] [1.]1. A process for preparing a propylene resin sheet for thermoforming which comprises subjecting a propylene resin laminated sheet which comprises an intermediate layer of a propylene resin having a density of 0.900 g/cm.sup.3 or less and a melt flow rate in the range of 0.3 to 20 g/10 min and propylene resin surface layers laminated on both surfaces of the intermediate layer and having a density in the range of 0.903 to 0.920 g/cm.sup.3 and a melt flow rate in the range of 0.3 to 20 g/10 min, the total sheet thickness being in the range of 0.1 to 2 mm, and the total thickness of the both surface layers being 1/2 or less of the total sheet thickness, said propylene resin for the intermediate layer consisting essentially of a copolymer of propylene and an .alpha.-olefin, said copolymer having a propylene content of 90 to 99% by weight; said propylene resin for the surface layers consisting essentially of a propylene resin selected from the group consisting of a propylene homopolymer and a copolymer of propylene having units of propylene of 97% by weight or more; and said propylene resin laminated sheet having a flexural modulus of 1450 to 1850 MPa measured by the method of JIS-K6758, to oxidation treatment so that the wet surface tension of at least one surface of the sheet is in the range of 36 to 55 dyne/cm, and coating the treated surface with an antifogging agent comprising as an effective ingredient a polyglycerol fatty acid ester which contains a saturated fatty acid having 12 to 16 carbon atoms in an amount of 70% by weight or more in relation to the constituent fatty acids and a degree of an average esterification in the range of 12 to 24%.