Abstract: A dewatering and thickening belt having an endless fabric woven with synthetic resin filaments, a bending-resistant element and a guide protrusion, wherein the guide protrusion is fusion-bonded to a bending-resistant portion to which the bending-resistant element has been attached so that the outer end portion of the guide protrusion is located inside the end portion of the fabric. The inner end portion of the guide protrusion is located 20 to 50 mm outside the inner end portion of the bending-resistant element.

Abstract: In a press fabric for a pulp machine having a multilayer structure, which fabric is woven using, as a warp, a monofilament as a warp and, as wefts, a yarn obtained by bundling raw yarns of a small diameter and forming a fine water sucking space therebetween and a monofilament, at least an upper surface side weft and a lower surface side weft are arranged vertically as the wefts; the yarns forming a fine water-sucking space and monofilament are used as wefts constituting the lower side layer; they are arranged at a ratio of 2:2 or 1:2; and two monofilaments are arranged adjacent to each other as the lower surface side wefts, whereby the press fabric can maintain its dewatering channel for discharging water to the back surface side from the initial stage to the final stage of use.

Abstract: In a press fabric for a pulp machine having a multilayer structure, which fabric is woven using, as a warp, a monofilament as a warp and, as wefts, a yarn obtained by bundling raw yarns of a small diameter and forming a fine water sucking space therebetween and a monofilament, at least an upper surface side weft and a lower surface side weft are arranged vertically as the wefts; the yarns forming a fine water-sucking space and monofilament are used as wefts constituting the lower side layer; they are arranged at a ratio of 2:2 or 1:2; and two monofilaments are arranged adjacent to each other as the lower surface side wefts, whereby the press fabric can maintain its dewatering channel for discharging water to the back surface side from the initial stage to the final stage of use.

Abstract: A dewatering and thickening belt having an endless fabric woven by a synthetic resin filament, a bending-resistant element and a guide protrusion, wherein the fabric is a two-layer fabric obtained by binding an upper surface layer composed of upper surface side warps and upper surface side wefts and a lower side layer composed of lower surface side warps and lower surface side wefts with warp binding yarns for weaving the upper and lower layers. The bending-resistant element has a width of from 30 to 60 mm and is attached to the fabric by filling a urethane resin in at least 85% of the space of the fabric at the selvage portion thereof. The guide protrusion is attached by fusion-bonding to a bending-resistant portion to which the bending-resistant element has been attached.

Abstract: A dewatering and thickening belt having an endless fabric woven with synthetic resin filaments, a bending-resistant element and a guide protrusion, wherein the guide protrusion is fusion-bonded to a bending-resistant portion to which the bending-resistant element has been attached so that the outer end portion of the guide protrusion is located inside the end portion of the fabric. The inner end portion of the guide protrusion is located 20 to 50 mm outside the inner end portion of the bending-resistant element.

Abstract: A process for producing a contact lens having a hydrophilic surface comprising subjecting a contact lens material comprising a copolymer prepared by copolymerizing a monomer mixture containing a polymerizable monomer (A) which is at least one member selected from a sugar ketal-containing (meth)acrylate and a sugar glycerol ketal-containing (meth)acrylate, and a polymerizable monomer (B) which is copolymerizable with the polymerizable monomer (A) to acid treatment, wherein the polymerizable monomer (B) contains a hydrophobic monomer which is at least one member selected from a silicon-containing monomer, a fluorine-containing monomer and a silicon- and fluorine-containing monomer, and a contact lens which has high oxygen permeability and of which surface shows stably excellent hydrophilic property and which is excellent in deposit resistance at the same time.

Abstract: The invention provides a cleaning method for removing dirt on an industrial belt and a cleaning belt used in the same. A cleaning belt having through-holes is provided onto an industrial belt. The cleaning belt comprises structural unit pieces in parallel to one another in a lengthwise direction. Each of the unit pieces is loosely interconnected and has a play such that the unit piece can move. The movement gives vibration onto the industrial belt when the cleaning belt is brought in contact with the surface of a running industrial belt. Then dirt on the industrial belt is removed through the through-holes.

Abstract: Method for manufacturing a non-woven fabric with irregular patterns by using a belt having projections for providing irregular patterns on the non-woven fabric and applying highly pressurized water and hot air onto a fiber assembly placed on and carried by the belt in order to press the fiber assembly to the belt and entangle the fiber of the fiber assembly.

Abstract: A method for treating the surface of an oxygen permeable hard contact lens, which comprises applying high-frequency glow discharge treatment to an oxygen permeable hard contact lens made of a copolymer consisting essentially of at least one monomer selected from the group consisting of a silicone-containing (meth)acrylate, a fluorine-containing (meth)acrylate, a silicone-containing styrene and a fluorine-containing styrene, in a gas atmosphere of at least one member selected from the group consisting of helium, neon, argon and nitrogen gas, containing substantially no oxygen.

Abstract: A method for treating the surface of an oxygen permeable hard contact lens, which comprises applying high-frequency glow discharge treatment to an oxygen permeable hard contact lens made of a copolymer consisting essentially of a silicone-containing (meth)acrylate and/or a fluorine-containing (meth)acrylate, in a gas atmosphere of at least one member selected from the group consisting of helium, neon, argon and nitrogen gas, containing substantially no oxygen.

Abstract: A highly water-absorptive soft contact lens made of a copolymer comprising(A) 10 to 40 parts by weight of an acrylate or methacrylate polymer having a hydrophilic group and at least one polymerizable group in its molecule and(B) 90 to 60 parts by weight of a hydrophilic monomer selected from the group consisting of a N-vinyllactam, acrylamide, N-substituted acrylamide derivative, methacrylamide and N-substituted methacrylamide derivative;the total amount of the components (A) and (B) being 100 parts by weight. The soft contact lens has a high water content, excellent oxygen permeability, transparency and excellent physical properties.

Abstract: A water-absorptive contact lens made of a copolymer comprising units of an ester of acrylic or methacrylic acid and at least one saccharide selected from D-galactose, D-glucose and D-mannose and units of at least one member selected from a hydrophilic monomer and a hydrophobic monomer, which has excellent oxygen permeability and affinity for the eye and can be worn continuously for a long period of time. The contact lens is prepared by polymerizing a monomer mixture containing an ester of acrylic or methacrylic acid with a ketalized saccharide and a hydrophilic monomer and/or a hydrophobic monomer, and after forming the resulting copolymer into a contact lens, if necessary, treating the copolymer having a shape of contact lens with an acid to convert the ketal groups into hydroxyl groups.

Abstract: A copolymer suitable for use as soft contact lenses, comprising a polymerization product of (a) at least one monomer selected from methyldi(trimethylsiloxy)sylylpropylglycerol methacrylate and methyldi(trimethylsiloxy)sylylpropylglycerolethyl methacrylate, (b) a hydrophilic monomer and (c) a cross-linking agent having at least two copolymerizable functional groups. Soft contact lens made of the above copolymer has excellent oxygen permeability in spite of low water content and can be comfortably worn continuously for a long term without a foreign body sensation and pain.