Papermaking device and method for producing papermaking device
AssigneeIchikawa Co., Ltd.
InventorsYuya Takamori, Manami Morinaga
Life of this patent
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Abstract
A papermaking device may have excellent strength and suppressed unevenness in strength between its parts. Such a papermaking device may be used in papermaking machine and may include at least one resin layer comprising polyurethane resin. The polyurethane resin may be obtained by reacting a urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group. The urethane prepolymer may be obtained by reacting a polyisocyanate compound including 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate with a polyol compound including one or more polyether polycarbonate diol(s).
Claims19
A papermaking device configured for use in a papermaking machine, the device comprising:
- a resin layer comprising a polyurethane resin,
- wherein the polyurethane resin is obtained by reacting a urethane prepolymer comprising an isocyanate group with a curing agent comprising an active hydrogen group,
- wherein the urethane prepolymer is obtained by reacting a polyisocyanate compound comprising 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate with a polyol compound comprising a polyether polycarbonate diol, and
- wherein the polyether polycarbonate diol comprises a unit A of formula (1)
- R1 being a bivalent group derived from a polyether polyol, and
- wherein the polyether polycarbonate diol is used as a polyol compound together with the 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate for the urethane prepolymer to make the polyurethane resin.
A method for producing a papermaking device suitable for use in a papermaking machine, the method comprising:
- forming a resin layer comprising a polyurethane resin by curing a polyurethane material,
- wherein the polyurethane material comprises a urethane prepolymer having an isocyanate group and a curing agent having an active hydrogen group,
- wherein the urethane prepolymer is obtained by reacting a polyisocyanate compound comprising 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate with a polyol compound comprising a polyether polycarbonate diol, and
- wherein the polyether polycarbonate diol comprises a unit A of formula (1)
- R1 being a bivalent group derived from a polyether polyol, and
- wherein the polyether polycarbonate diol is used as a polyol compound together with the 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate for the urethane prepolymer to make the polyurethane resin.
Dependencies are inferred from the claim text.