Sealing members and method of producing the same
First Claim
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1. A sealing member comprising:
- an elastic sheet having a density in a range of 100 to 250 kg/m3 in which the sheet was formed by reacting and curing a polyurethane-foam raw material having 100% by volume of a resin raw material and 300% by volume or more of a foam-forming gas mixed therewith, the elastic sheet having a compression load deflection at 50% in the range of 0.003 to 0.025 MPa, and the compression load deflection at 75% thereof being in the range of 0.02 to 0.40 MPa, wherein the resin raw material contains polyol and isocyanate as a main raw material and a foam stabilizer as an auxiliary material.
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Abstract
A sealing member comprising an elastic sheet having a density in the range of 100 to 250 kg/m3. The elastic sheet is obtained by reacting and curing a polyurethane-foam raw material which is provided by mixing 100% by volume of a resin raw material and 300% by volume or more of a foam-forming gas, in which the resin raw material includes polyol and isocyanate as a main raw material and a foam stabilizer as an auxiliary material, and the like. The compression load deflection at 50% of the elastic sheet is in the range of 0.003 to 0.025 MPa, and the compression load deflection at 75% thereof is in the range of 0.02 to 0.40 MPa.
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Citations
11 Claims
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1. A sealing member comprising:
an elastic sheet having a density in a range of 100 to 250 kg/m3 in which the sheet was formed by reacting and curing a polyurethane-foam raw material having 100% by volume of a resin raw material and 300% by volume or more of a foam-forming gas mixed therewith, the elastic sheet having a compression load deflection at 50% in the range of 0.003 to 0.025 MPa, and the compression load deflection at 75% thereof being in the range of 0.02 to 0.40 MPa, wherein the resin raw material contains polyol and isocyanate as a main raw material and a foam stabilizer as an auxiliary material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of producing a sealing member, the method comprising:
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supplying a resin raw material containing polyol and isocyanate as a main raw material and a foam stabilizer as an auxiliary material;
feeding a polyurethane-foam raw material having 100% by volume of the resin raw material and 300% by volume or more of a foam-forming gas mixed, onto a substrate film;
controlling the thickness of the polyurethane-foam raw material to be within a range of 0.3 to 3.0 mm; and
promoting the reaction and curing of the fed polyurethane-foam raw material so as to produce an elastic sheet comprising a polyurethane-foam having a thickness in the range of 0.3 to 3.0 mm, a density set arrange of 100 to 250 kg/m3, a compression load deflection at 50% in a range of 0.003 to 0.025 MPa, and a compression load deflection at 75% in a range of 0.02 to 0.40 MPa. - View Dependent Claims (8, 9, 10, 11)
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Specification