WO2006126233A1 - Natural or synthetic yarns with high absorption property obtained by introduction of superabsorbent hydrogel - Google Patents

Natural or synthetic yarns with high absorption property obtained by introduction of superabsorbent hydrogel Download PDF

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Publication number
WO2006126233A1
WO2006126233A1 PCT/IT2006/000386 IT2006000386W WO2006126233A1 WO 2006126233 A1 WO2006126233 A1 WO 2006126233A1 IT 2006000386 W IT2006000386 W IT 2006000386W WO 2006126233 A1 WO2006126233 A1 WO 2006126233A1
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WO
WIPO (PCT)
Prior art keywords
yarn
hydrogel
super absorbent
bound
nature
Prior art date
Application number
PCT/IT2006/000386
Other languages
French (fr)
Inventor
Alessandro Sannino
Alfonso Maffezzoli
Mauro Pollini
Original Assignee
Megatex S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Megatex S.P.A. filed Critical Megatex S.P.A.
Priority to EP06756294A priority Critical patent/EP1893795B1/en
Priority to DE602006016120T priority patent/DE602006016120D1/en
Priority to AT06756294T priority patent/ATE477359T1/en
Publication of WO2006126233A1 publication Critical patent/WO2006126233A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
    • D02G3/404—Yarns or threads coated with polymeric solutions
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/448—Yarns or threads for use in medical applications

Definitions

  • super absorbent hydrogel are used in bio- medicine as controlled release medicine, artificial muscles and the similar; in cosmetic as absorbents; in agriculture for dry fields cultivation; in advanced technologies as actuators; in building for production of gum - super absorbent compounds, which are used, for example, to prevent water infiltrations between adjacent concrete blocks (as in the Eurotunnel between United Kingdom and Europe); in the production of artificial snow (by using super absorbents, the first indoor track has been open in 1991 near Tokyo).
  • a very interesting hydrogel subclass comprises polyelectrolyte hydrogel characterised by the presence of ionic groups (or ionizzable, under certain equilibrium conditions) in the macromolecular structure.
  • ionic groups or ionizzable, under certain equilibrium conditions
  • the ionic groups are connected to the gel network, forming a real macromolecular poly-ion.
  • hydrogel and polyelectrolyte hydrogel due to the presence of fixed charges, the latter are still able to absorb a large quantity of the
  • Polyelectrolyte gel can have either anionic or cationic character, according to the presence of carboxylic or tertiary amino groups in the polymeric structure. For this reason, polyelectrolyte gels are very attractive for all the applications requiring a behaviour related with the external conditions under which the gel operates. These conditions (temperature, pH, composition, ionic strength) are the same features of the solution, which the gel is in chemical equilibrium with. Tn fact, a solvophile* gel with pending acid groups has a good polymer— solvent affinity, and shows an absorbent capacity which grows with the increase of the external pH solution. On the contrary, a solvophile gel, having pending basic groups, shows an absorbent capacity which grows with the decrease of the pH.
  • the polyelectrolyte gel exhibits a discontinuous behaviour of the swelling grade versus pH. In other words, the gel passes from a collapsed state to a swollen state when pH reaches a critical value, which produces a sudden change of the swelling grade.
  • the invention aims at solving the discomfort deriving from the direct contact between sweat and skin, and the bad smell produced during sport as well as daily like activities.
  • the sweat is absorbed by the gel which releases, in turn, a fragrance, previously added in the fabric washing or to the gel.
  • the invention relates to yarns, fabrics or end products, like socks or stockings, characterized in that they ensure very high sweat absorption property, given by the addition of super absorbent hydrogel.
  • Figure 2 shows the absorption values in salt solution of the acrylic hydrogel
  • Figure 3 shows the absorption tests in salt solution 0.9wg% on a cotton fabric and on a fabric made by 80% cotton and 20%;
  • Figure 4 is the chemical structure of the cellulose based macromolecule
  • FIG. 5 shows the scheme of the DVS molecule
  • super absorbent hydrogel are prepared by free radical polymerization of the acrylic acid and salts with a cross-Unking agent, in water solution or in drops suspension of water solution in hydrocarbons.
  • These two processes namely "bulk” solution polymerization and suspension polymerization, have several features in common; the monomer and cross-linking agent concentrations, the initiator and its concentration monomers relative reactivity, the polymerization kinetics and reaction temperatures.
  • Monomer concentration in the reactive solution affects the resulting polymer properties, the reaction kinetic and the process economy. High monomer concentrations cause an increase of the polymer gel stiffness during polymerization.
  • Gel stiffness has an effect on the design of the production tools, on the gel particles size produced during the reacting mass stirring, and the heat removal technique.
  • the chain transfer reactions increase with the monomer concentration; and this happens especially at high conversion degrees, causing more "braching" and self-reticulating reactions, which influence the final product properties.
  • Monomer concentration also influences the cross-linking agent efficiency.
  • said cross-linking agents are water unsoluble, but soluble in organic solvents; therefore, by making a more organic solution, the increase of the monomer concentration also improves the cross-linking agent solubility.
  • the network cycling reactions decrease by increasing the cross-linking agent concentration, as reported by Flory. Small quantities of cross-linking agent play an important role in altering the super absorbent properties.
  • the typically used cross-linking agents are bi- and tri-acrylate esters.
  • the cross-linking agents influence the quantity of soluble polymer formed during polymerization and the mechanic and swelling properties as well.
  • suspension polymerization on the contrary, small drops of water-monomer solution are dispersed into another phase, generally aromatic or aliphatic hydrocarbons, before polymerization.
  • the neutralization degree is higher in the second procedure, because of the acrylic acid solubility in the hydrocarbon phase, which makes the reaction and the manipulation more difficult.
  • fibers In textile applications, it can be used either powder hydrogel, dispersed on natural or synthetic fibers, or fiber-shaped hydrogel.
  • fibers whose length is suitable for textile applications (4 ⁇ -70mm) are produced by spinning.
  • the spinning technique makes possible the polymerization of a fiber-shaped hydrogel, by acting on both the section and the length of the single fiber.
  • the spinning itself consisting of a further stretch and cohesion to the yarn (generally, by twisting), and winding the yarn around a suitable support.
  • the spinning has been carried out using a homogeneous mix of fibers in bulk, in other words, the material from each lot is opened into small elements, forming a small cloth; said cloth is made by small tufts comprising two or more components, randomly distributed but in precise ratios.
  • weaving follows.
  • the absorption test Confirms an absorption of salt solution by a hydrogel-containing fabric higher than a 100% cotton fabric; the washing test confirms a low hydrogel loss during washings.
  • the fabric containing 20% hydrogel effectively absorbs much more than a 100% cotton fabric.
  • Natural cross-linkable polymers are derived by cellulose, like carboxyl-methyl-cellulose (CMC) hydroxyl-ethyl-cellulose (HEC) sodium salt. Once reticulated, CMC has all the features to be used as super absorbent material. First of all, such polymer is biodegradable and available on the market at reasonable price.
  • CMC has all the polyelectrolyte characteristics, which are needed to develop a Donnan equilibrium with the external solution. Moreover, CMC is water- soluble, therefore has great affinity w i"+lh the external solution.
  • HEC is also derived from cellulose and is highly hydrophilic, but, unlike CMC, has not any charge group connected to the polymeric network, therefore, does not provide support the "Donnan effect", which improves the absorption. HEC is employed in many applications, even industrial ones, as for example detergent agent for hair shampoo.
  • CMC and HEC The root structure of CMC and HEC is shown in Figure 4.
  • bi- vinyl- sulphonal (DVS) has been used as cross-linking agent agent to produce the polymeric network.
  • DVS molecular scheme is represented in Figure 5.
  • Double bonds CH 2 CH are very reactive: once opened, they can bind both sides of the molecule to other reactive groups, like the cellulose ones, creating the polymeric network.
  • natural hydrogel is polymerized as short fiber, by spinning technique.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Lubricants (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Production of yarns able to absorb the sweat, by introduction of super absorbent material (hydrogel) inside the yarn itself, and eventually to release perfume, previously absorbed inside the hydrogel. The super absorbent hydrogel are reticulated polymers, able to absorb up to 2 litre of water per gram of dry material. Production of yarns able to absorb the sweat, by introduction of super absorbent material (hydrogel) inside the yarn itself, and eventually to release perfume, previously absorbed inside the hydrogel. Hydrogel sweat absorption increases the comfort, since the sportsman hangover sensation is often due to the sweat direct contact with the skin. Once washed and dried, the fabric realized with such a yarn is ready for reuse, because the hydrogel absorption characteristics are fully reversible and remain even after the washing. Moreover the hydrogel is able to absorb the perfume of the washing soap and, thanks to its nature, to keep it for a long time and to release it slowly.

Description

Title: Natural or synthetic yarns with high absorption property obtained by introduction of super- absorbent hydrogel
Applicant: Megatex S.p.A.
Technical field
At the present, super absorbent hydrogel are used in bio- medicine as controlled release medicine, artificial muscles and the similar; in cosmetic as absorbents; in agriculture for dry fields cultivation; in advanced technologies as actuators; in building for production of gum - super absorbent compounds, which are used, for example, to prevent water infiltrations between adjacent concrete blocks (as in the Eurotunnel between United Kingdom and Europe); in the production of artificial snow (by using super absorbents, the first indoor track has been open in 1991 near Tokyo).
A very interesting hydrogel subclass comprises polyelectrolyte hydrogel characterised by the presence of ionic groups (or ionizzable, under certain equilibrium conditions) in the macromolecular structure. Actually, the ionic groups are connected to the gel network, forming a real macromolecular poly-ion. In fact, there is no clear distinction between hydrogel and polyelectrolyte hydrogel: due to the presence of fixed charges, the latter are still able to absorb a large quantity of the
i solvent (water). Often they are called hydrogel with ionizable groups.
Polyelectrolyte gel can have either anionic or cationic character, according to the presence of carboxylic or tertiary amino groups in the polymeric structure. For this reason, polyelectrolyte gels are very attractive for all the applications requiring a behaviour related with the external conditions under which the gel operates. These conditions (temperature, pH, composition, ionic strength) are the same features of the solution, which the gel is in chemical equilibrium with. Tn fact, a solvophile* gel with pending acid groups has a good polymer— solvent affinity, and shows an absorbent capacity which grows with the increase of the external pH solution. On the contrary, a solvophile gel, having pending basic groups, shows an absorbent capacity which grows with the decrease of the pH. A remarkable attention has been given at the solvophobic reticulated polymeric systems, which have a poor affinity with the solvent. In this case, the polyelectrolyte gel exhibits a discontinuous behaviour of the swelling grade versus pH. In other words, the gel passes from a collapsed state to a swollen state when pH reaches a critical value, which produces a sudden change of the swelling grade.
This special behaviour encourages the use of polyelectrolyte gel in several applications, like components of chemical separation systems, devices for medicine release, artificial muscles and the similar. In textile application, hydrogel as super absorbent material have not been employed. The best comfort is reached by adding synthetic hollow fibers, like Coolmax®, to the textile which ensures a better transpiration.
Disclosure of the invention
The invention aims at solving the discomfort deriving from the direct contact between sweat and skin, and the bad smell produced during sport as well as daily like activities. In fact, by using hydrogcls, the sweat is absorbed by the gel which releases, in turn, a fragrance, previously added in the fabric washing or to the gel. For this reason, the invention relates to yarns, fabrics or end products, like socks or stockings, characterized in that they ensure very high sweat absorption property, given by the addition of super absorbent hydrogel.
These and other advantages will be pointed out in the detailed description of the invention that will refer to the figures of the tables 1/5, 2/5, 3/5, 4/5 and 5/5. Both are examplifying and not restrictive.
Way of carrying out the invention
With reference to the above mentioned tables:
• Figure 1 represents the spinning cycle
• Figure 2 shows the absorption values in salt solution of the acrylic hydrogel • Figure 3 shows the absorption tests in salt solution 0.9wg% on a cotton fabric and on a fabric made by 80% cotton and 20%;
• Figure 4 is the chemical structure of the cellulose based macromolecule;
• Figure 5 shows the scheme of the DVS molecule Typically, super absorbent hydrogel are prepared by free radical polymerization of the acrylic acid and salts with a cross-Unking agent, in water solution or in drops suspension of water solution in hydrocarbons. These two processes, namely "bulk" solution polymerization and suspension polymerization, have several features in common; the monomer and cross-linking agent concentrations, the initiator and its concentration monomers relative reactivity, the polymerization kinetics and reaction temperatures. Monomer concentration in the reactive solution affects the resulting polymer properties, the reaction kinetic and the process economy. High monomer concentrations cause an increase of the polymer gel stiffness during polymerization. Gel stiffness has an effect on the design of the production tools, on the gel particles size produced during the reacting mass stirring, and the heat removal technique. Moreover, the chain transfer reactions increase with the monomer concentration; and this happens especially at high conversion degrees, causing more "braching" and self-reticulating reactions, which influence the final product properties. Monomer concentration also influences the cross-linking agent efficiency. In fact, said cross-linking agents are water unsoluble, but soluble in organic solvents; therefore, by making a more organic solution, the increase of the monomer concentration also improves the cross-linking agent solubility. Moreover, the network cycling reactions decrease by increasing the cross-linking agent concentration, as reported by Flory. Small quantities of cross-linking agent play an important role in altering the super absorbent properties. For these substances/ material, the typically used cross-linking agents are bi- and tri-acrylate esters. The cross-linking agents influence the quantity of soluble polymer formed during polymerization and the mechanic and swelling properties as well. There are several techniques for preparing super absorbent. In the graft copolymerization, hydro-soluble polymers (like amid or polyvinyl alcohol), are grafted to the super absorbent to modify its properties. In suspension polymerization, on the contrary, small drops of water-monomer solution are dispersed into another phase, generally aromatic or aliphatic hydrocarbons, before polymerization. Generally, the neutralization degree is higher in the second procedure, because of the acrylic acid solubility in the hydrocarbon phase, which makes the reaction and the manipulation more difficult.
In textile applications, it can be used either powder hydrogel, dispersed on natural or synthetic fibers, or fiber-shaped hydrogel. In particular, fibers, whose length is suitable for textile applications (4ϋ-70mm) are produced by spinning. The spinning technique makes possible the polymerization of a fiber-shaped hydrogel, by acting on both the section and the length of the single fiber.
Description of preferred embodiments
To manufacture the yarn, cotton has been mixed with acrylic short fiber hydrogel, varying the percentages according to the absorption properties desired. The spinning process is schematized in Figure 1. The working flowchart shows 5 basic operations:
• Bale opening, containing a homogeneous mix of the several fibers forming the yarn;
• opening of the tangled tufts to clean the raw material by eliminating impurities;
• creation of a fiber band, without any applied twisting. In this step, the reciprocal adherence between the fibers is enough to provide a uniform cohesion, together with a certain orientation of the fibers towards the band axis (substantially obtained by carding operation);
• band refining and normalization, together with improved fiber parallelism, obtained by following couplings and stretching, until the sliver is reached;
• the spinning itself, consisting of a further stretch and cohesion to the yarn (generally, by twisting), and winding the yarn around a suitable support. The spinning has been carried out using a homogeneous mix of fibers in bulk, in other words, the material from each lot is opened into small elements, forming a small cloth; said cloth is made by small tufts comprising two or more components, randomly distributed but in precise ratios. After spinning, weaving follows. The absorption test Confirms an absorption of salt solution by a hydrogel-containing fabric higher than a 100% cotton fabric; the washing test confirms a low hydrogel loss during washings.
Mixed spinning technique can be carried out by using either cellulose hydrogel or acrylic one. An alternative procedure is to use the same hydrogel and bind them to the yarn surface by means of a bonding agent. Tests on hydrogel fibers give the following results: Absorption (g/g): 0.9 wg% salt solution
In Figure 2, the absorption values in salt solution of the acrylic hydrogel under different measurement conditions have been reported. The tests have been carried out with a salt solution, to best simulate the typical conditions of sweat absoiption. As shown in Figure 2, absorption properties are also exceptional under load, typical operating condition for some cloths, socks or stockings for example. Retention property is also excellent, meaning that the sweat, once absorbed by the hydrogal-containing fabric is not released, until the fabric itself dries.
Absorption tests in salt solution 0.9wg% have been carried out on a cotton fabric and on a fabric made by 80% cotton and 20% hydrogel; the results are summarized in Figure 3.
As shown in Table 2, the fabric containing 20% hydrogel effectively absorbs much more than a 100% cotton fabric.
Adding hydrogel to the yarn allows producing ideal fabrics for all applications in which sweat and bad smells can cause discomfort; hydrogel-yarn absorbs sweat and in turn releases fragrance previously added to the hydrogel. Once washed and dried, this fabric is ready for reuse, keeping the same absorption properties. According to the described processes, it is also possible to add natural hydrogel to the yarn. Natural cross-linkable polymers are derived by cellulose, like carboxyl-methyl-cellulose (CMC) hydroxyl-ethyl-cellulose (HEC) sodium salt. Once reticulated, CMC has all the features to be used as super absorbent material. First of all, such polymer is biodegradable and available on the market at reasonable price. Furthermore, thanks to the ionic group, the carboxyl-methyl group, bounded by an ether bond with the cellulose structure, CMC has all the polyelectrolyte characteristics, which are needed to develop a Donnan equilibrium with the external solution. Moreover, CMC is water- soluble, therefore has great affinity wi"+lh the external solution. HEC is also derived from cellulose and is highly hydrophilic, but, unlike CMC, has not any charge group connected to the polymeric network, therefore, does not provide support the "Donnan effect", which improves the absorption. HEC is employed in many applications, even industrial ones, as for example detergent agent for hair shampoo.
The root structure of CMC and HEC is shown in Figure 4. As cross-linking agent agent to produce the polymeric network, bi- vinyl- sulphonal (DVS) has been used. DVS molecular scheme is represented in Figure 5. Double bonds CH2=CH are very reactive: once opened, they can bind both sides of the molecule to other reactive groups, like the cellulose ones, creating the polymeric network. In this case too, natural hydrogel is polymerized as short fiber, by spinning technique.

Claims

Claims
1) Yarn characterized by high sweat; absorption, obtained by super absorbent hydrogel integration.
2) Yarn according to claim I9 wherein it is a natural (cotton or wool) yarn.
3) Yarn according to claim 1 , wherein it is a polymeric yarn.
4) Yarn according to claim 1 wherein in the yarn, by mixed spinning, acrylic super absorbent hydrogel is integrated.
5) Yarn according to claim 1 wherein in the natural (cotton or wool) yarn, by mixed spinning, acrylic super absorbent hydrogel is integrated.
6) Yarn according to claim 1 wherein in the polymeric yarn, by mixed spinning, acrylic super absorbent hydrogel is integrated. * 7) Yarn according to claim 1, wherein in the yarn, by mixed spinning, cellulose super absorbent hydrogel is integrated. 8) Yarn according to claim 1 , wherein in the natural (cotton or wool) yarn, by mixed spinning, cellulose super absorbent hydrogel is integrated. 9) Yarn according to claim 1 , wherein in the polymeric yam, by mixed spinning, cellulose super absorbent hydrogel is integrated. 10) Yarn according to claim 1, wherein the yarn is bound with super absorbent hydrogel powder of acrylic nature. 11) Yarn according to claim 1, wherein the natural (cotton or wool) yarn is bound with super absorbent hydrogel powder of acrylic nature.
12) Yarn according to claim 1, wherein the polymeric yarn is bound with super absorbent hydrogel powder of acrylic nature.
13) Yarn according to claim 1 , wherein the yarn is bound with super absorbent hydrogel powder of. cellulose nature.
14) Yarn according to claim 1, wherein the natural (cotton or wool) yarn is bound with super absorbent hydrogel powder of cellulose nature.
15) Yarn according to claim 1 , wherein the polymeric yarn is bound with super absorbent hydrogel powder of cellulose nature. 16) Yarn according to claim 1, wherein the yarn is bound with hydrogel coating of acrylic nature.
17) Yarn according to claim 1 , wherein the natural (cotton or wool) yarn is bound with hydrogel coating of acrylic nature.
18) Yarn according to claim 1, wherein the polymeric yarn is bound with hydrogel coating of acrylic nature.
19) Yarn according to claim 1, wherein the yam is bound with hydrogel coating of cellulose nature.
20) Yarn according to claim 1 , wherein the natural (cotton or wool) yarn is bound with hydrogel coating of cellulose nature. 21) Yarn according to claim 1 , wherein the polymeric yarn is bound with hydrogel coating of cellulose nature.
22) Yarn according to claim I5 wherein -jsaid hydrogel comprises perfumed substances, which can be released during absorption with a controlled kinetic.
23) Yarn according to claim 1, wherein said natural (cotton or wool) hydrogel comprises perfumed substances, which can be released during absorption with a controlled kinetic.
24) Yarn according to claim 1, wherein said polymeric hydrogel comprises perfumed substances, which can be released during absorption with a controlled kinetic.
25) Yarn as in claim 22, wherein the perfume absorption and release is a reversible and repeatable process.
26) Sock or stocking characterized by high sweat absorption, obtained by super absorbent hydrogel integration.
27) Sock or stocking according to claim 26, wherein in the yarn, by mixed spinning, acrylic super absorbent hydrogel is integrated.
28) Sock or stocking according to claim 26, wherein in the natural (cotton or wool) yarn, by mixed spinning, acrylic super absorbent hydrogel is integrated.
29) Sock or stocking according to claim 26, wherein in the polymeric yarn, by mixed spinning, acrylic super absorbent hydrogel is integrated. 30) Sock or stocking according to claim 26, wherein in the yarn, by mixed spinning, cellulose super absorbent hydrogel is integrated.
31) Sock or stocking according to claim 26, wherein in the natural (cotton or wool) yarn, by mixed spinning, cellulose super absorbent hydrogel is integrated.
32) Sock or stocking according to claim 26, wherein in the polymeric yarn, by mixed spinning, cellulose super absorbent hydrogel is integrated. \ 33) Sock or stocking according to claim 26, wherein the yarn is bound with super absorbent hydrogel powder of acrylic nature.
34) Sock or stocking according to claim 26, wherein the natural (cotton or wool) yarn is bound with super absorbent hydrogel powder of acrylic nature.
35) Sock or stocking according to claim 26, wherein the polymeric yarn is bound with super absorbent hyrirogel powder of acrylic nature.
36) Sock or stocking according to claim 26, wherein the yarn is bound with super absorbent hydrogel powder of cellulose nature.
37) Sock or stocking according to claim 26, wherein the natural (cotton or wool) yarn is bound with super absorbent hydrogel powder of cellulose nature. 38) Sock or stocking according to claim 26, wherein the polymeric yam is bound with super absorbent hydrogel powder of cellulose nature.
39) Sock or stocking according to claim 26, wherein the yarn is bound with hydrogel coating of acrylic nature.
40) Sock or stocking according to claim 26, wherein the. natural (cotton or wool) yarn is bound with hydrogel coating of acrylic nature.
41) Sock or stocking according to claim 26, wherein the polymeric yarn is bound with hydrogel coating of acrylic nature.
42) Sock or stocking according to claim 26, wherein the yarn is bound with hydrogel coating of cellulose nature.
43) Sock or stocking according to claim 26, wherein the natural (cotton or wool) yarn is bound with hydrogel coating of cellulose nature.
44) Sock or stocking according to claim 26, wherein the polymeric yarn is bound with hydrogel coating of cellulose nature. 45) Sock or stocking according to claim 26, wherein said hydrogel comprises perfumed substances, which can be released during absorption with a controlled kinetic. 46) Sock or stocking as in claim 45 wherein the perfume absorption and release is a reversible and repeatable process.
PCT/IT2006/000386 2005-05-24 2006-05-22 Natural or synthetic yarns with high absorption property obtained by introduction of superabsorbent hydrogel WO2006126233A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP06756294A EP1893795B1 (en) 2005-05-24 2006-05-22 Natural or synthetic yarns with high absorption property obtained by introduction of superabsorbent hydrogel
DE602006016120T DE602006016120D1 (en) 2005-05-24 2006-05-22 NATURAL OR SYNTHESIS GREASE WITH HIGH ABSORPTION CAPACITY BY MACHINING SUPER ABSORBENT HYDROGEL
AT06756294T ATE477359T1 (en) 2005-05-24 2006-05-22 NATURAL OR SYNTHETIC YARN WITH HIGH ABSORPTION CAPACITY THROUGH INCORPORATING SUPERABSORBENT HYDROGEL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITLE2005A000007 2005-05-24
IT000007A ITLE20050007A1 (en) 2005-05-24 2005-05-24 YARNS OF NATURAL AND SYNTHETIC ORIGIN WITH PROPERTIES OF HIGH ABSORPTION OBTAINED THROUGH THE INTRODUCTION OF SUPER-ABSORBENT HYDROGEL.

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EP (1) EP1893795B1 (en)
AT (1) ATE477359T1 (en)
DE (1) DE602006016120D1 (en)
IT (1) ITLE20050007A1 (en)
WO (1) WO2006126233A1 (en)

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Publication number Priority date Publication date Assignee Title
US20130158494A1 (en) * 2011-12-19 2013-06-20 Kimberly-Clark Worldwide, Inc. Absorbent Article Including Superabsorbent Yarn
CN114351335A (en) * 2021-12-22 2022-04-15 安丹达工业技术(上海)有限公司 Hydrogel three-dimensional interval textile material, application thereof and mask comprising hydrogel three-dimensional interval textile material

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JPS6456142A (en) * 1987-08-24 1989-03-03 Japan Exlan Co Ltd Deodorizing sheet
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130158494A1 (en) * 2011-12-19 2013-06-20 Kimberly-Clark Worldwide, Inc. Absorbent Article Including Superabsorbent Yarn
US9675501B2 (en) * 2011-12-19 2017-06-13 Kimberly-Clark Worldwide, Inc. Absorbent article including superabsorbent yarn
CN114351335A (en) * 2021-12-22 2022-04-15 安丹达工业技术(上海)有限公司 Hydrogel three-dimensional interval textile material, application thereof and mask comprising hydrogel three-dimensional interval textile material
CN114351335B (en) * 2021-12-22 2024-03-15 安丹达工业技术(上海)有限公司 Hydrogel three-dimensional interval textile material, application thereof and mask comprising hydrogel three-dimensional interval textile material

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DE602006016120D1 (en) 2010-09-23
ATE477359T1 (en) 2010-08-15
EP1893795B1 (en) 2010-08-11
ITLE20050007A1 (en) 2006-11-25
EP1893795A1 (en) 2008-03-05

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