摘要:
The present invention is directed to absorbent composites comprising superabsorbent materials. The superabsorbent material has: an Absorption Time of about 5+10 a2 minutes or greater, where a is the mean particle size of the superabsorbent material in millimeters; a capacity of about 15 g/g or greater; a Drop Penetration Value of about 2 seconds or less; and, a ½ Float Saturation of 50% or less. The present invention is further directed to fiber-containing fabrics and webs comprising superabsorbent materials and their applicability in disposable personal care products.
摘要:
The present invention relates to superabsorbent cross-linked polymers for watery liquids, which are built-up of partially neutralized monomers having monoethylenlcally unsaturated acid groups, optionally further monomers copolymerizable therewith, as well as polymers optionally suitable as graft basis, and which can be manufactured by using a cross-linker/monomer combination of CH.sub.2 .dbd.CHR.sup.6 --CO--(OCHR.sup.3 --CHR.sup.3).sub.z O--CH.sub.2 --CHR.sup.6 .dbd.CH.sub.2 CH.sub.2 .dbd.CHR.sup.6 --R.sup.5 --(OCHR.sup.3 --CHR.sup.3).sub.v OR.sup.4R.sup.1 --�O(CHR.sup.3 --CHR.sup.3 O).sub.u --CO--R.sup.2 !.sub.x, and/or di- or triallylamine and/or bisacrylamide with R.sup.1 : multivalent C2-10-alkyl, R.sup.2 : linear or branched C2-10-alkenyl, R.sup.3 : H, CH.sub.3, C.sub.2 H.sub.5, R.sup.4 : H, linear or branched C1-10-alkyl, R.sup.6 : CO, CH.sub.2 R.sup.8 : H, CH.sub.3 x: 2-6 u: 0-15 V: 1-45 z: 3-20 As compared with the state of the art, the polymers according to the present invention have an improved combination of the properties retention, liquid absorption under pressure at 63 g/cm.sup.2 and soluble contents, moreover, they have an Increased permeability of the gel layer for watery liquids, a high suction rate, and a high swelling pressure. The polymers are used as absorbents for water and watery liquids in constructions for the absorption of body fluids, In electricity or light-conducting cables, and in plant raising.
摘要:
The invention relates to hydrophilic superabsorbent polymer comprising a) from about 55 to about 99.9 wt. % of polymerizable unsaturated acid group containing monomers; b) from about 0.001 to about 5.0 wt. % of internal crosslinking agent; c) from about 0.001 to about 5.0 wt. % of surface crosslinking agent applied to the particle surface; and d) wherein the composition has a degree of neutralization of more than about 20%, and from about 20 mole % to about 75 mole % of the unsaturated acid group containing monomers are neutralized with a first neutralizing agent, and from about 5 mole % to about 40 mole % of the unsaturated acid group containing monomers are neutralized with a second neutralizing agent; at a temperature of about 75° C. or less. Such hydrophilic superabsorbent polymers have an Absorption Time of about 5+10 a2 minutes or greater, where a is the mean particle size of the superabsorbent material in millimeters, a capacity of about 15 g/g or greater, a Drop Penetration Value of about 2 seconds or less, and a floatability of 50% or less.
摘要:
The invention relates to hydrophilic superabsorbent polymer comprising a) from about 55 to about 99.9 wt. % of polymerizable unsaturated acid group containing monomers; b) from about 0.001 to about 5.0 wt. % of internal crosslinking agent; c) from about 0.001 to about 5.0 wt. % of surface crosslinking agent applied to the particle surface; and d) wherein the composition has a degree of neutralization of more than about 20%, and from about 20 mole % to about 75 mole % of the unsaturated acid group containing monomers are neutralized with a first neutralizing agent, and from about 5 mole % to about 40 mole % of the unsaturated acid group containing monomers are neutralized with a second neutralizing agent; at a temperature of about 75° C. or less. Such hydrophilic superabsorbent polymers have an Absorption Time of about 5+10 a2 minutes or greater, where a is the mean particle size of the superabsorbent material in millimeters, a capacity of about 15 g/g or greater, a Drop Penetration Value of about 2 seconds or less, and a ½ Float Saturation of 50% or less.
摘要:
The invention relates to hydrophilic, highly swellable polymers for aqueous fluids, e.g. superabsorbants, which are coated with reactive, water-insoluble, film-forming, hydrophobic polymers and an additional reactive constituent which can react with carboxyl groups of carboxylate anions and form additional cross-links on the particle surface. The invention also relates to the production of superabsorber thus coated and their use in hygiene articles used to absorb body fluids. The products obtained by coating highly swellable, hydrophilic, insoluble polymers with reactive, water-insoluble, film-forming, hydrophobic polymers and an additional reactive component are characterized in that their absorption speed cam be adjusted in an controlled manner extended area according to the type and amount of reactive, water-insoluble, film-forming, hydrophobic polymers used in the coating and according to process engineering conditions chosen for said coating.
摘要:
Stator winding (18) comprising multiple phase windings (12). A phase winding has at least two partial phase windings (120a, 120b) which include coils (123) and coil connectors (126) that run parallel.
摘要:
The method for making a stator includes making individual strip-shaped laminas (15) for it; stacking the laminas (15) to form a stator core (13) with grooves (18) on one side extending through the core; producing a subassembly by inserting a stator winding (17) into the grooves (18); bending the subassembly to form a cylindrical cavity so that the grooves (18) end in the cavity and connecting two ends (23) of the stator core (13) to each other by a welding seam (20) to maintain this configuration. To produce a welding seam of sufficient strength which does not exert excessive influence on magnetic properties, the welding seam depth (TS) is given by TS=0.5 mm*(Hyoke/mm−1)±ΔTS, wherein Hyoke is yoke height and ΔTS is a tolerance value. An electric machine including the stator made by this method is also described.
摘要:
A striplike lamination (10) for a stator of an electrical machine is proposed, in which the striplike lamination has an end contour (19) on each strip end (18). The end contours (19) are embodied such that a difference in length at the lamination (10) resulting from bending can be compensated for.
摘要:
Method for stamping multiple coil sides (96) for a stator winding (18), characterized in that the multiple coil sides (96) are arranged in a grooved row (90), the shaping process taking place at a force (F), the direction of which runs at an angle (α) greater than zero relative to the grooved row (90).
摘要:
The present invention relates to a method and a device for manufacturing a radial centering surface on an outer circumference of an annular laminated core of a stator, the centering surface (19; 35) being created by cutting. The present invention also relates to a stator (1; 109; 140) with centering surfaces (114; 148, 149) created by cutting, and an electrical machine (100) with a stator (109), which includes radial centering surfaces created by cutting.