Patent application number | Description | Published |
20080207792 | Method Of Surface Treating Particulate Material Using Electromagnetic Radiation - The present disclosure relates to a method of surface treating particulate materials with electromagnetic radiation, in particular a method of cross-linking superabsorbent polymer particles using UV irradiation. The method is carried out with a so-called roll reactor, which comprises a rotating roll and an irradiation source. Radical former molecules can be applied on the surface of superabsorbent polymer particles. The particulate material is fed onto the surface of the roll and is irradiated while moved with the rotating roll. The irradiation source is provided such that the radiation emitted by the irradiation source is able to reach at least part of the particulate material that has been fed onto the surface of the roll. The irradiation source for use in the method of the present disclosure is able to emit UV radiation of a wavelength between 201 nm and 400 nm. The present disclosure also relates to absorbent articles comprising surface treated superabsorbent particles made by said method. | 08-28-2008 |
20090131633 | METHOD OF SURFACE CROSS-LINKING SUPERABSORBENT POLYMER PARTICLES USING ULTRAVIOLET RADIATION AND BRONSTED ACIDS - The present invention relates to a method of surface cross-linking superabsorbent polymer particles using UV irradiation. The superabsorbent polymer particles for use in the method of the present invention have a relatively high degree of neutralization. Bronsted acids are selectively applied onto the surface of the superabsorbent polymer particles to selectively facilitate a relatively high number of protonated carboxyl groups at the surface of the superabsorbent polymer particles while the relatively high degree of neutralization in the core of the superabsorbent polymer particles remains substantially unaffected. | 05-21-2009 |
20090137694 | METHOD OF SURFACE CROSS-LINKING SUPERABSORBENT POLYMER PARTICLES USING ULTRAVIOLET RADIATION - The present invention relates to a method of surface cross-linking superabsorbent polymer particles using UV irradiation. The method is carried out in a so-called drum reactor, which comprises a hollow drum and an irradiation source. The drum has a longitudinal axis and a cross-section. Radical former molecules are applied on the surface of superabsorbent polymer particles. These superabsorbent polymer particles are fed into the drum and are irradiated while they move within the drum, which is rotated around its longitudinal axis. The irradiation source is provided such that the radiation emitted by the irradiation source is able to reach superabsorbent polymer particles within said drum. The irradiation source for use in the method of the present invention is able to emit UV radiation of a wavelength between 201 nm and 400 nm. | 05-28-2009 |
20090197985 | METHOD OF SURFACE CROSS-LINKING SUPERABSORBENT POLYMER PARTICLES USING VACUUM ULTRAVIOLET RADIATION - The present invention relates to a method of surface cross-linking superabsorbent polymer particles using UV irradiation. The method is carried out in a so-called drum reactor, which comprises a hollow drum and an irradiation source. The drum has a longitudinal axis and a cross-section. Superabsorbent polymer particles are fed into the drum and are irradiated while they move within the drum, which is rotated around its longitudinal axis. The irradiation source is provided such that the radiation emitted by the irradiation source is able to reach superabsorbent polymer particles within said drum. The irradiation source for use in the method of the present invention is able to emit UV radiation of a wavelength between 100 nm and 200 nm. | 08-06-2009 |
20090298963 | METHOD FOR PRODUCTION OF MODIFIED WATER ABSORBENT RESIN - This invention is to provide a method for producing a modified water absorbent resin excelling in water absorbing properties. This invention relates to a method for producing a modified water absorbent resin, which comprises a) mixing a water absorbent resin and a water-soluble radical polymerization initiator or a heat-degradable radical polymerization initiator without addition of an ethylenically unsaturated monomer and b) irradiating the resultant mixture with active energy rays. The method is particularly capable of exalting the absorbency against pressure and the saline flow conductivity. | 12-03-2009 |
20090299315 | Surface Cross-Linked Superabsorbent Polymer Particles and Methods of Making Them - Superabsorbent polymer particles with improved surface cross-linking and their use in absorbent articles. The superabsorbent polymer particles comprise polymer chain segments, wherein at least a part of the polymer chain segments are covalently cross-linked to each other and wherein at least a part of the cross-links include the reaction product of cross-linking molecules having at least two C═C double bonds and further include the reaction product of radical former molecules. These cross-links are present at surfaces of the superabsorbent polymer particles. | 12-03-2009 |
20100228210 | Thin And Dry Diaper - An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed having an absorbent core which imparts increased wearing comfort to the article and makes it thin and dry. The absorbent core useful for an absorbent article comprises a substrate layer, a discontinuous layer of absorbent material, and a layer of thermoplastic material. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. Portions of a second surface of the layer of thermoplastic material are in direct contact with the first surface of the substrate layer and portions of said second surface of the layer of thermoplastic material are in direct contact with a first surface of the discontinuous layer of absorbent material. A process for providing a storage layer for an absorbent core useful in an absorbent article is further disclosed. | 09-09-2010 |
20100228211 | COMFORTABLE DIAPER - An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more | 09-09-2010 |
20110203355 | Method For Determing The Gel Strength Of A Hydrogel - Method for determining the intrinsic gel strength of a water-absorbing hydrogel-forming polymeric material, comprising the step of: obtaining a hydrogel of said water-absorbing polymeric material, submitting said hydrogel to a controlled strain application step and measuring the stress; or submitting said hydrogel to a controlled stress application step and measuring the strain, and determining from said measured stress or strain of step c) the modulus of said hydrogel. | 08-25-2011 |
20110295222 | Comfortable Diaper - An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein. | 12-01-2011 |
20120108686 | Method For Determining The Performance Of A Superabsorbent Polymer Material - Method for determining the performance of a superabsorbent polymer material by using a virtual model of the superabsorbent polymer material comprising the steps of inputting values of one or more first molecular parameter(s) into the virtual model and calculating the value(s) of one or more first performance output parameter(s) and inputting values of one or more second molecular parameter(s) into the virtual model and calculating the value(s) of one or more second performance output parameter(s) and determining the variation between the value(s) of the one or more first performance output parameter(s) and the value(s) of the one or more second performance output parameter(s). | 05-03-2012 |
20120108687 | Processes Using Supercritical Medium To Produce Polymers - Processes for making water-absorbent cross-linked polymers, such as polyacrylic acids/polyacrylates, using supercritical medium; and water-absorbent polymers, e.g. particles thereof, obtained by such processes, where such particles may be porous. | 05-03-2012 |
20140135726 | THIN AND DRY DIAPER - An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed having an absorbent core which imparts increased wearing comfort to the article and makes it thin and dry. The absorbent core useful for an absorbent article comprises a substrate layer, a discontinuous layer of absorbent material, and a layer of thermoplastic material. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. Portions of a second surface of the layer of thermoplastic material are in direct contact with the first surface of the substrate layer and portions of said second surface of the layer of thermoplastic material are in direct contact with a first surface of the discontinuous layer of absorbent material. A process for providing a storage layer for an absorbent core useful in an absorbent article is further disclosed. | 05-15-2014 |
20140378924 | ABSORBENT ARTICLES WITH ACTIVATION-FRIENDLY LAMINATES - An absorbent article comprising at least one stretchable laminate comprising a first nonwoven, a second nonwoven, and an elastic film therebetween, wherein each of the first and second nonwovens is adhesively bonded to the film by a hot melt adhesive; wherein the film is no thicker than about 60 micrometers; wherein at least one of the nonwovens is spunbonded; wherein the laminate is activated with a minimum of about 290% applied strain and a minimum strain rate of about 850/sec; and wherein the laminate is substantially free from pinholes. | 12-25-2014 |