ES2223485T3 - PADDING FOR A SEAT OR A FURNITURE FURNITURE WITH A DESORBENT HUMIDITY ACCUMULATOR. - Google Patents

Abstract

According to the invention, the padding of a seat or a reclining piece of furniture is provided with a desorbent moisture accumulator in the form of a hydrophilic layer which absorbs the bodily moisture from the user in a reversible manner. A known chemical superabsorber is used to form the hydrophilic layer. Said hydrophilic layer consists of an interwoven support material containing individual fibres, or an open-pored plastic foam and the superabsorber which is polymerised onto the support material. The fibres of the interwoven material are thus at least proportionally coated by the superabsorber. As an alternative, the hydrophilic layer can also consist solely of a foamed superabsorber. The specific advantages of this padding are improved seating comfort and the ability of the superabsorber to remain attached to the support material, even at a high level of moisture saturation, in a gelled state. In addition, a spatially more favourable distribution is achieved, providing a substantially enlarged absorbent surface.

Description

Padded for a seat or rest furniture with a desorbent moisture accumulator.

Technical Field of the Invention

The present invention relates to a padding for a seat or a piece of furniture with a humidity accumulator desorbent which is arranged, preferably as a piece interspersed with the hydrophilic layer, between the padding lining and padding core and that releases moisture absorbed by the user back to the air environmental. The padding cores are made however often in synthetic material, which by nature does not they are hydrophilic, so moisture retention is formed uncomfortable between the padding and the body surface of the seated person who comes into contact with him. Is quite known that with the removal of moisture of this type and avoiding a Moisture retention comfort can be greatly improved. Especially desirable is the improvement of the seating climate over padding that is used, without interruption, during periods of prolonged time such as office chairs, seats cars and seats in long means of transport travel.

State of the art

According to EP 0 126 798 B1 publication proposed firstly to favor the removal of moisture that is accumulates by disposing of a steam permeable mat of water on the surface of the oriented sponge material core towards the user, where in the core of sponge material are provided channels for the derivation of moisture. These channels do not they should be narrowed completely because of the compression due to user load. As water vapor permeable mat, which It is covered by an outer covering fabric, a nonwoven material with hydrophilic binder. Non-woven material it must be able to store a portion of the moisture as well as in case of saturation, derive moisture permeable.

In patent publications DE 36 09 095 C2, DE 40 01 207 A1 and DE 197 26 810 C1 are proposed in a manner complementary, for more intensive moisture removal, aerate in a forced manner the layer of non-woven material applied to the core of sponge material and combine it with a heating. The layer of nonwoven material contains a hydrophilic absorption material in fiber and / or powder form.

By publication DE 40 34 920 A1 is known form hydrophilic layers for seats with copolymers covalently crosslinked, which are used in Different embodiments. It is mentioned foaming the copolymer particulate hydrophilic in the pore sponge material open or intermingle between layers of nonwoven material and fix it in bags by adhesion or sewing. This is intended avoid irregular distribution of the copolymer. It also indicates how to remove the liquid component from the copolymer with the in order to make a sheet or cotton for disposal, e.g. ex. interweave it in a non-woven material, in this way between the core of sponge material and the outer covering of the seat.

Publication DE 41 27 337 A1 teaches complementary to use, for the hydrophilic layer, polymers superabsorbents, that is, macromolecular materials that they can swell with water, water soluble or crosslinked, linear. As particularly suitable it is indicated to limit the hydrophilic layer, oriented towards the user of the seat, by means of a hydrophobic layer, moisture permeable and provide for aeration on the side posterior of the hydrophilic layer.

Publication DE 198 09 156 A1 describes form the hydrophilic layer with three bonded layers. Here the two layers outer, at least the outer layer facing the user of the seat, must be permeable to moisture. Between layers outside is, as a sort of separation point, a carrier layer made of loose fibers, curled together, in the which are absorbed particles of absorber.

The state of the art known so far It suffers from the following disadvantages:

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The fixation of superabsorber in the form of granules on or in a carrier material by interwoven, sewn or glued requires relatively much work and devices and machines are needed to manufacture individual parts.

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The clothing parts with built-in superabsorber not manufactured they can be cut already later because otherwise it would come out granulated from the cut piece of clothing.

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The incorporation of the superabsorber through p. ex. interwoven, sewn or glued on the padding material determines a surface that is limitedly open.

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He granules of the superabsorber adheres only conditioned to the carrier material so that in case of loading there is a danger of migration of the granulate with distribution irregular.

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In case of greater moisture absorption the granulate of the superabsorber goes into a jelly-like state so that it they release joints glued with the carrier material.

Problem posed by the invention

In view of the mentioned disadvantages earlier in the introduction in relation to suprabsorbers in hydrophilic layers, which are inserted into padded to remove moisture from the user, the invention poses the problem of proposing a hydrophilic layer formed in such a way that such disadvantages are avoided. The manufacturing complexity during the manufacture of a padding with a desorbent moisture accumulator should be reduced and be, in Total, more cost efficient.

Overview of the invention

The hydrophilic layer is formed with a material known carrier itself, which consists of a fiber braid individual, on which a polymer is directly polymerized superabsorber. The fiber braiding is either directly outer lining of the padding or an intercalated piece the which is introduced separately in the padding or is connected with the coating. The application of the superabsorber takes place, e.g. ex. by spraying on the carrier material and consequently polymerization process The individual fibers of the material Carrier are coated, almost wrapped, with superabsorber.

A carrier material coated in this way with a superabsorber can be cut to size without problems in conventional installations. Ready-made custom cut pieces can be introduced into the padding, preferably between the outer lining and the foam padding core. In case of maximum saturation with humidity, the
Perabsobedor retains, in the gelatinized state, thanks to the fiber coating, its connection with them. As an additional advantage is a spatially more favorable distribution of the superabsorber as a coating of the carrier fibers with a markedly increased absorber surface.

Execution Example

Usually a padding consists of a core of Foamed synthetic material and an outer covering made in textile material, or where appropriate leather, spread over it. He padding generally consists of two parts, that is, a padding for the horizontal seating or resting surface - to accommodate the user innkeepers or the entire body in position lying - and a padding for the vertical surface as a backrest. The hydrophilic layer according to the invention is suitable for both surfaces, that is, for seats in the form of stools, chairs, armchairs, benches, floor pillows and vehicle seats as well as for rest furniture, that is, sofas, beds and sun loungers.

For the arrangement of the hydrophilic layer in the Padded two variants are proposed.

Variant TO

Between the core of the padding, which is preferably made of foamed synthetic material, and a outer lining, which allows the passage of moisture but not absorbs it, a hydrophilic layer is introduced. This hydrophilic layer It is made of a non-woven material as carrier material on  whose fibers have been polymerized a superabsorber chemically in yes known. Preferably the hydrophilic layer according to the invention it is manufactured in the form of mats, so that from it it can cut the different interleaved pieces of the layer configured, -p. ex. for the seat surface or the backrest of an office chair. Between the outer coating and the layer inserted hydrophilic an intermediate layer may be arranged hydrophobic

Variant B

The carrier material in the form of material does not fabric with the polymerized superabsorber above and the hydrophilic coating that is formed in this way is lined on the outer lining for padding. The lined over the outer covering takes place, as a rule, on the remote side of the user.

The humidity that the user gives off at contact surfaces with the padding diffuses through the coating and is absorbed by the hydrophilic layer, which acts as a desorbent moisture accumulator, until its saturation. This removes moisture near the body of the user of your clothes or the bare surface of your skin and avoid the awkward feeling of sweaty moisture. If the user leaves the padding, so that ambient air accesses the surfaces of the hydrophilic layer loaded with moisture, a process begins reversible. Through the coating, the hydrophilic layer detaches successively the moisture absorbed into the surrounding air. He moisture release from the hydrophilic layer can be achieved also when the user remains on the padding, but in the padded free surfaces have been created, through which the circulating ambient air can access the hydrophilic layer.

Claims (9)

1. Padding for a seat or a rest furniture with a desorbent moisture accumulator in the form of a hydrophilic layer for the reversible absorption of body moisture from the user in which a chemically absorbed super absorber is used for the formation of the hydrophilic layer known, characterized in that the hydrophilic layer consists of a carrier material in the form of a braid with individual fibers and the polymerized superabsorber over the carrier material, the braiding fibers being coated, at least proportionally, by the
Pebsorber. 2. Padding according to claim 1, characterized in that the hydrophilic layer is inserted between a core of foamed synthetic material and an outer, moisture-permeable but hydrophobic coating itself. 3. Padding according to claim 1 or 2, characterized in that the super absorber, prior to polymerization, is sprayed or applied by immersion procedure on the carrier material. 4. Padding according to one of claims 1 to 3, characterized in that

to)

he carrier material equipped with the superabsorber presents the form of mats and can be cut to size in a complementary way to the surface geometry of the padding; Y

b)

the hydrophilic layer disposed in the padding is formed with one or several layers.

5. Padding according to one of claims 1 to 4, characterized in that a hydrophobic layer is arranged between the outer coating and the hydrophilic layer. 6. Padding according to one of claims 1 to 4, characterized in that the padding coating, preferably its side away from the user, is directly the carrier material for the polymerized super absorber above. 7. Padding according to one of claims 1 to 4, characterized in that

to)

on the padding lining, preferably on its side away from the user, the carrier material is lined with the polymerized superabsorber above, and

b)

between the lining for the padding and the carrier material with the a polymerized superabsorber above can be arranged a layer hydrophobic

8. Padding according to one of claims 1 to 7, characterized in that in the hydrophilic layer there are free surfaces, next to which air from the environment can circulate in front of the desorption of previously absorbed moisture, even when a user requests padding . 9. Padding according to one of claims 1 to 8, characterized in that

to)

he Padding is intended for the seat surface and / or the backrest of a seat or the resting and / or backrest surface of a piece of furniture repose;

b)

seats that comprise the objects stools, chairs, armchairs, benches, floor pillows and seats of vehicles, and

C)

rest furniture comprising sofas, Beds and sunbeds.