Helsinki, Finland
Helsinki, Finland

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Patent
Ahlstrom | Date: 2015-05-15

A wall covering, a method of producing it and a method of covering a wall. The wall covering comprises a planar substrate, such as a nonwoven base substrate, having a front, and a back facing opposite the front. There is a barrier layer on the back of the substrate and an adhesive layer superimposed on the barrier layer. The adhesive layer comprises a first polymer component, a second polymer component, the first polymer component being a non crosslinked polymer and said second polymer component being a crosslinked polymer exhibiting properties of superabsorbency. The adhesive exhibits when exposed to water, a strength sufficient for binding to a wall substrate and a glide resistance low enough for allowing repositioning of the wall cover by sliding the wallcover on the wall without having to lift it up over a period of time of at least 5 minutes.


Patent
Ahlstrom | Date: 2017-03-22

A wall covering, a method of producing it and a method of covering a wall. The wall covering comprises a planar substrate, such as a nonwoven base substrate, having a front, and a back facing opposite the front. There is a barrier layer on the back of the substrate and an adhesive layer superimposed on the barrier layer. The adhesive layer comprises a first polymer component, a second polymer component, the first polymer component being a non crosslinked polymer and said second polymer component being a crosslinked polymer exhibiting properties of superabsorbency. The adhesive exhibits when exposed to water, a strength sufficient for binding to a wall substrate and a glide resistance low enough for allowing repositioning of the wall cover by sliding the wallcover on the wall without having to lift it up over a period of time of at least 5 minutes.


Patent
Ahlstrom | Date: 2015-02-11

A dye-receiving material comprising:a support comprising synthetic fibers; anda three-dimensional network entangled with at least some of the fibers contained in the support, the three-dimensional network comprising a first polymer that is cross-linked by a second polymer; wherein:the first polymer is a polyamine comprising primary amine groups, the first polymer being cationic and water soluble; andthe second polymer is a water soluble polymer that is different from the first polymer, the second polymer containing repeating units comprising halohydrin and/or epoxide groups that are capable of forming covalent cross-links with the primary amine groups of the first polymer.


Patent
Ahlstrom | Date: 2016-04-08

A non-woven web including: a first surface area of the web including hydro-embossments and devoid of thermo-embossments, wherein the first surface area covers five to ninety-five percent of a total surface area of the non-woven web, and a second surface area of the web including thermo-embossments and devoid of hydro-embossments, wherein the second surface area covers at least two percent of the total surface area of the non-wove web and wherein the first surface area does not overlap the second surface area.


A unidirectional reinforcement and a method of producing a unidirectional reinforcement that may be used in applications where high quality and strength is required. The unidirectional reinforcement includes transversely arranged discrete Z-direction resin flow facilitating means running back and forth between the longitudinal edges of the sheets, and traveling between the groups of rovings and between the top and bottom surfaces of the unitary web.


The present invention relates to a unidirectional reinforcement and a method of producing a unidirectional reinforcement. The unidirectional reinforcement of the present invention may be used in all such applications where high quality and strength is required. The unidirectional reinforcement (20) of the invention comprises transversely arranged thin discrete flow passage forming means (40) for ensuring good resin flow properties in a direction transverse to the direction of the unidirectional rovings. The thin discrete flow passage forming means (40) are secured on the unidirectional rovings by means of additional yarns (42) running on the thin discrete flow passage forming (40) means and transverse thereto.


Patent
Ahlstrom | Date: 2016-06-22

A dye-capturing laundry aid comprising:a support in the form of a sheet comprising water-insoluble fibers;a first substance anchored to the support, wherein the first substance has moieties that are cationic when exposed to water at one or more pH values in the pH range of from 6 to; anda second substance that coats the first substance, wherein the second substance is a polymer that remains substantially coated upon the first substance when the laundry aid is exposed to water over the pH range of from 6 to 10, and at least 50% of the repeating units in the polymer have a structure according to the following Formula (1):


A non woven web containing water insoluble nanofibers and/or microfibers obtained by an electrospinning process using water based solution containing at least two components, a first component having carboxylic acid and/or anhydride functionalities and a second component having primary and/or secondary amino functionalities, the web being cured upon a heat treatment. Application: filtration and separation.


Patent
Ahlstrom | Date: 2016-08-17

The present invention relates to a colorant composition comprising a cationic polyamine polymer, a crosslinker polymer and a dye. The composition can be used to impart color to a wide variety of fiber-containing substrates with a high degree of color-fastness.


Patent
Ahlstrom | Date: 2015-01-07

The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprisesa first layer comprising first fibers having a first average diameter and a first maximum fiber length;a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length;whereinthe boundary area between the first and the second layer forms a first blended area comprising first and second fibers; andthe boundary area between the second and the third layer forms a second blended area comprising second and third fibers;and wherein the first and the third average diameters are each larger than the second average diameter.

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