EP2770896B1 - Domestic appliance, in particular a domestic dishwasher, having butyl material, in particular butyl adhesive, or an acrylic material, in particular acrylate adhesive, on a component wall - Google Patents

Description

The invention relates to a household appliance, in particular a domestic dishwasher, with a component having at least one component wall made of plastic.

To the component wall of a component are in practice often above all for the purpose of Entdröhnung, the sound and / or thermal insulation serving bitumen mats glued. In the case of metal component walls, an adhesive bond which withstands higher temperatures and, in particular, frequent temperature changes, as is the case, for example, with dishwashing dishwashers, is obtained with the aid of a hot-melt adhesive. However, it has been found that hot-tack adhesives can not be used to permanently produce adhesive bonds between bitumen mat and component walls made of some plastics, such as polyolefins. The hot-melt adhesive combines with sufficient strength with the bitumen mat, but not with the plastic of the component wall. To create a reasonably durable adhesive bond, the component wall would have to be subjected to a production cost-increasing pretreatment, such as a roughening or corona treatment. In addition, hot melt adhesives must be heated for their processing to a melting temperature of, for example, 120 ° C and more. During bonding, therefore, a component wall is thermally stressed, which is rather harmless in metal walls, but can lead to component walls of a plastic but especially for dissolution of internal stresses of the component walls and thus deformations or deviations of these plastic components, so that the components made of plastic optionally as scrap must be discarded.

The publication US 2002/0134615 A1 discloses a noise suppression system for a kitchen, which should reduce in particular emissions from household appliances. The noise suppression system comprises a plurality of absorption plates, which spaced from a household appliance in a kitchen niche provided for receiving the household appliance are arranged. The absorption plates thus surround the niche side and forming an air gap the household appliance; So they are not in direct contact with the household appliance, especially with its side walls. Furthermore, the absorption plates are constructed in multiple layers and they are fixedly attached by means of an adhesive layer to a plaster layer or a dry wall of the kitchen niche. The adhesive layer may comprise an acrylic-based adhesive, such as an acrylic-viscoelastic polymer.

The publication US 2010/0024851 A1 discloses an insulation element for a household electrical appliance, such as a household dishwasher. The insulation element comprises a base body which is made of an expandable material. Such an expandable material may comprise, for example, a mixture of viscose fibers, nylon fibers or acrylic fibers. The heat-expandable material is arranged at least on the upper, the left and the right side wall, possibly also on the rear wall of the washing container of the household dishwasher. The washing container of the household dishwasher may consist of a plastic, a composite material or a metal material.

The publication DE 42 27 957 A1 discloses a household appliance, in particular a noise and / or heat-insulated dishwasher or washing machine whose housing wall parts or rinsing or tub are at least partially covered with insulating mats of bitumen, plastic, mineral fibers or the like. The insulating mats are each connected to the rinsing container or the like via a single or multi-layered intermediate carrier, which is aufspaltbar in itself or removable from the washing, the housing wall parts or of the insulating mat.

On this basis, it is the object of the invention to provide a household appliance, which provides an improvement here.

The object is achieved according to the features of claim 1, wherein on at least one side of the component wall of the component, a base layer of a butyl material, in particular butyl adhesive, or an acrylic material, in particular acrylate adhesive, is present.

On the one hand, such a primer layer adheres to the materials usually used for component walls in household appliances, such as, for example, metal and / or plastic, but especially, in particular, to plastic, with the best adhesion to polyolefins, and in particular to polypropylene. On the other hand, the butyl adhesive, or the acrylate adhesive, can advantageously be used at room temperature, so that an impermissible thermal load on the component wall is excluded. This is particularly favorable for a component wall made of plastic, as it is avoided that this is heated to high temperatures, as is the case for example when applying and activating hot melt adhesive on a plastic component wall. Thus, due to the "cold" application of the butyl material, in particular butyl adhesive, or the acrylic material, in particular acrylate adhesive, on the respective component wall not to undesirable material changes such as the degradation of frozen internal material stresses and concomitant, impermissible deformation of the component wall due to inadmissible high thermal loads or stresses come.

The base layer of a Butylkteber, or from an acrylate adhesive, can be used in particular for fixing a further, serving for example for sound insulation, sound insulation, and / or for Entdröhnung, and / or thermal insulation layer. Layer thicknesses of 0.2 to 2 mm, preferably between 0.5 to 1.5 mm layer thickness are then provided for the base layer in order to ensure proper adhesion of the further layer to be applied, which serves for example for sound insulation, soundproofing, deadening, and / or thermal insulation. to be able to ensure.

However, it has now surprisingly been found that the base layer can not serve or not only merely as an adhesive layer or adhesive layer in particular for fixing a further layer, but even with a corresponding layer thickness of for example 2 to 8 mm sufficient for many applications, has in particular insulating, damping and / or enthroning and / or heat-insulating or heat-insulating effect. In other words, it may already be sufficient if only one or more layers of butyl adhesive, or of an acrylate adhesive, seated or seated on the respective component wall. In this case, this butyl adhesive layer, or this acrylate adhesive layer, can already be used alone, that is, as a sound-insulating, sound-damping and / or deadening, and / or heat-insulating material layer. In order to allow a buildup of a base layer of butyl adhesive layer or acrylate adhesive layer having a thickness in said thickness range, the viscosity of the butyl adhesive, or acrylic rubber, of the base layer may be increased, for example, by adding thickeners and / or fillers. In particular, butyl adhesive does not solidify in a manner known from two-component adhesives, for which reason it may already be expedient for the base layer of butyl adhesive to be combined with a further layer and thus covered. Of course, a covering layer with a base layer of acrylate adhesive may be just as expedient. Preferably, however, a layer is selected, which can take over Entdröhn-, sound insulation, Schalldämpfungs- and / or thermal insulation tasks in addition to the covering function. Thus, for example, a relatively rigid film made of plastic or preferably of a metal such as aluminum, are glued to the base layer of a component wall. The combination of the viscous, to some extent flowable base layer of butyl adhesive, or acrylate adhesive, and a solid mass, which is formed by a film of the type mentioned, creates a "constrained-layer" system or a Entdröhn double layer, which Roar of the component wall, which is caused for example by impinging on the respective component wall water jets or by resonant vibrations of the component wall, prevents or at least reduced.

According to the invention is with the base layer of butyl adhesive, or acrylic adhesive, in particular a bitumen mat or other heavy mat or other insulation mat connected. Due to its relatively large mass, such a mat has a decaying effect and, moreover, also a heat and sound insulating effect. Due to the entdröhnenden effect of the base layer but it is also conceivable to combine a no or less entdröhnend acting layer with a correspondingly thick base layer, such as a layer which serves primarily the thermal insulation, preferably a layer of a foam.

The application of the base layer of butyl adhesive, or acrylic adhesive, on the component surface can be done for example by brushing, rolling, or spraying on the component wall and / or on the further layer, wherein subsequently the further layer is applied to the component wall.

According to the invention, an adhesive film formed from a carrier film and an adhesive layer, the base layer, is used. The attachment of a base layer and a cover layer covering these can thus be accomplished in a simple manner by the adhesive film is applied to the component wall in a single operation. The adhesive film thus simultaneously forms the base layer and a cover layer covering this. The adhesive film is formed out as a double-sided adhesive film, wherein the carrier film carries on its side facing away from the component wall side a second adhesive layer of butyl adhesive or acrylate adhesive in addition to the base layer of butyl adhesive or acrylate adhesive on its side facing the component wall. In particular, it may be expedient if the surface of that side of the component wall on which the butyl adhesive or the acrylate adhesive is applied is roughened, in particular plasma-coated. As a result, the adhesion of the butyl material, in particular of the butyl adhesive, or of the acrylic material, in particular acrylate adhesive, on the component wall can be improved.
Other advantageous developments of the invention are given in the dependent claims.

The invention and its advantageous embodiments and further developments and advantages thereof are explained in more detail below with reference to drawings.

Fig. 1

eine Geschirrspülmaschine als Beispiel eines erfindungsgemäß ausgebildeten Haushaltsgeräts schematisch in perspektivischer Darstellung;

Fig. 2

einen Ausschnitt aus der Geschirrspülmaschine von Fig. 1 in perspektivischer Darstellung, bei dem die Gehäusewände der Geschirrspülmaschine weggelassen sind, um ein Bauteilwände aufweisendes Bauteil, nämlich den Spülbehälter der Geschirrspülmaschine, sichtbar zu machen;

Fig. 3 bis Fig. 7

Schnittdarstellungen von Bauteilwänden entsprechend der Linie S-S in Fig. 2 mit unterschiedlichen Ausgestaltungen, wobei die Ausführungsformen gemäss den Figuren 3 bis 5 nicht unter die Erfindung fallen.

Each shows in a schematic schematic diagram:

Fig. 1

a dishwasher as an example of an inventively designed household appliance schematically in perspective view;

Fig. 2

a section of the dishwasher of Fig. 1 in a perspective view, in which the housing walls of the dishwasher are omitted to make a part walls exhibiting component, namely the washing compartment of the dishwasher to make visible;

Fig. 3 to Fig. 7

Sectional views of component walls according to the line SS in Fig. 2 with different configurations, wherein the embodiments according to the FIGS. 3 to 5 not covered by the invention.

In the figures, only those components of a dishwasher are provided with reference numerals and explained which are necessary for the understanding of the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies. Otherwise, elements with the same function and mode of action in the Fig. 1 to Fig. 7 each provided with the same reference numerals.

Fig. 1 shows, representative of a household appliance, a dishwasher 1, which comprises a washing container 3. The rinsing container 3 represents a case of a component 4, which has at least one component wall 5 made of plastic, namely a plurality of rinsing container walls. The component walls 4 do not necessarily all consist of plastic, for example polypropylene. It is also only a component wall 5, for example, the bottom wall 6 of the washing container 3, made of a plastic and the remaining walls of the washing container made of metal. A component wall 5 can continue to a door 7 may be present, which closes the forward facing loading opening 8 of the washing container 3 in the present case. The component wall 5 is formed in the said case by a door inner wall 9.

In the basic embodiment of the invention, a planar base layer 10 made of a butyl adhesive is applied to at least one side of a component wall 5. The butyl adhesive, has the advantage that it already adheres to the plastic of the component wall 5, without the corresponding side or surface of the component wall 5 previously treated, such as roughened, or a high-voltage electrical discharge (corona treatment) would have to be subjected. The connection between the base layer 10 and the component wall 5 is also such that it withstands higher temperatures and temperature changes, as occurs, for example, in the case of the washing container 3 of a dishwasher during its operation. According to the invention, the base layer is designed in such a way that it essentially serves only for gluing one or more further layers to a component wall. In this case, it has a relatively small thickness of 0, 2 to 2 mm, preferably 0.5 to 1.5 mm.

In the example of a washing container 3, the base layer 10 is disposed on the outside 13 of the washing compartment 3 facing away from the outside 14 of the component walls 5. In the case of the door 7, the base layer 10 is arranged on the outside of the door inner wall 9. The door 7 further comprises a door outer wall 15, wherein the base layer 10 is disposed in a cavity 16 present between the door inner wall 9 and the door outer wall 15.

The base layer 10 may be configured in different ways, in particular have different thicknesses and is connected to a further layer.

In Fig. 3 , which does not fall under the invention, an embodiment is shown in which the component wall 5 is coated with only a single layer, namely the base layer 10 of the butylene adhesive in question. A butyl adhesive, for example, consists of a mixture of isobutylene and natural rubber, wherein optionally carbon black particles and / or other fillers may be incorporated in this mixture. In particular, if a thicker base layer 10 of, for example, in the range of 2 to 8 mm and more is to be achieved, the addition of fillers is expedient, so that the butyl adhesive composition has a greater viscosity.

In Fig. 4 a non-inventive case is shown in which the base layer 10 is kept relatively thin and practically serves only as an adhesive layer. It has a thickness of 0.2 to 2 mm, preferably 0.5 to 1.5 mm. Adhere to the base layer 10, a further layer, preferably an insulating mat 17, so for Entdröhn-, sound insulation and / or Schalldämpfungszwecken, and / or thermal insulation serving mat, especially a bitumen mat or other insulating or heavy mat.

The insulating mat or insulating layer 17 may alternatively also be a relatively thin, for example 0.5 to 1.5 mm thick plastic or metal foil 18 ( Fig. 5 ). The base layer 10 of butyl adhesive, and adhering to it by means of the butyl adhesive metal or plastic film 18 act here as a Entdröhnschicht or a "constrained-layer" system, which prevents drone of the component wall 5 in the operation of the household appliance or at least reduced.

In order to facilitate the application of the base layer 10 of butyl adhesive on a component wall 5, according to the invention an adhesive film 19 (see Fig. 6 ), which comprises a carrier film 20 provided on one side with the base layer 10. The adhesive film can be easily attached to the component wall in one operation. In this case, the adhesive film 19 is seated with its base layer 10 made of butyl adhesive, on the respective component wall, such as in the case of a washing container on the outside of a Spülbehälterwand. It is doing a component wall 5 with a base layer 10 and a cover layer formed by the carrier film 19 are obtained. The carrier foil 20 can, as in Fig. 7 is optionally configured as a double-sided adhesive film 19a by the side facing away from the base layer 10 side of the carrier film 20 is also provided with a second adhesive layer 21 of a butyl adhesive. With this outer adhesive layer 21, a second, for example heat-insulating, layer 22 can be materially connected.

In a particularly advantageous embodiment, a double-sided adhesive film is provided which faces away from both the component wall and the component wall facing side of the carrier film 20 each have a butyl adhesive layer 10, 21, and in which on the outer Butylkleberschicht 21 a bitumen mat outside firmly seated , Thus, in general terms, an acoustic coating such as, for example, in the case of a dishwasher, a bitumen mat can be glued properly "largely cold" to a component wall, such as the underside of a plastic bottom of a washing tub of a dishwashing machine, ie an unacceptably high heat, which could have a negative effect on the material of the component wall, is thus avoided. Alternatively, it is of course also possible to prefabricate provided with butyl adhesive acoustic coatings such as bitumen mats and apply them each as a whole on the respective component walls. This simplifies the production. For example, such prefabricated acoustic coverings can be supplied by the supplier to the respective appliance manufacturer. This can then apply the ready coated with butyl compound acoustic coating on the respective component wall. For example, a bitumen mat with such a butyl compound layer, in particular butyl adhesive layer, on the wall of a washing container, in particular on a plastic wall such as the Spülbehälterboden of the washing container of a dishwasher can be glued on the outside.

Optionally, it may also be expedient if the component wall made of metal such as stainless steel or in particular made of metal with a temperature-sensitive lacquer layer or the like and on this the base layer of butyl adhesive is applied. Again, a sufficiently good adhesion or adhesion of the butyl adhesive to the surface of the respective metal component is present. In this case, the above for a component wall Plastic shown, advantageous embodiments in an analogous manner be used.

Furthermore, in the case that the respective household appliance has a door, as for example in a household dishwasher, expediently also the door have or form a component wall, on which a Butylkleberschicht is applied. This can serve to fix in particular an insulating layer such as a bitumen mat. The front door of a dishwasher usually has, in particular, an inner door wall and an outer door wall with a gap space between them. Conveniently, then the outside of the door inner wall is provided with a Butylkleberschicht and with the help of externally mounted an insulating layer such as a bitumen mat attached.

1. a. Bedämmen von ein oder mehreren Kunststoffbauteilen eines Haushaltsgeräts mittels einer Butylkleberschicht, und gegebenenfalls zusätzlich darauf aufgebrachter Dämmschicht wie zum Beispiel einer Bitumenmatte;
2. b. Bedämmen von ein oder mehreren temperatursensitiven Bauteilen (wie zum Beispiel lackierte Bauteile, etc.) eines Haushaltsgeräts mittels einer Butylkleberschicht, und gegebenenfalls zusätzlich darauf aufgebrachter Dämmschicht wie zum Beispiel einer Bitumenmatte;
3. c. Geräuschreduzierung bei einer Haushaltsgeschirrspülmaschine, deren Spülbehälter einen Kunststoffboden aufweist, oder deren Basisträger eine Kunststoffspülwanne aufweist, auf der ein haubenförmiger Spülbehälter aufsitzt, indem der Kunststoffboden oder die Kunststoffspülwanne mit einer Butylkleberschicht, und zusätzlich darauf aufgebrachter Dämmschicht wie zum Beispiel einer Bitumenmatte außenseitig, das heißt auf der dem Innenraum des Spülbehälters abgewandten Seite, versehen ist.

In summary, the following advantageous measures in household appliances are thus possible in particular:

1. a. Damming one or more plastic components of a domestic appliance by means of a butyl adhesive layer, and optionally additionally applied thereon insulating layer such as a bitumen mat;
2. b. Damping of one or more temperature-sensitive components (such as painted components, etc.) of a household appliance by means of a Butylkleberschicht, and optionally additionally applied thereon insulating layer such as a bitumen mat;
3. c. Noise reduction in a domestic dishwasher whose washing container has a plastic bottom, or the base support has a plastic Spülwanne on which a dome-shaped washing container is seated by the plastic floor or plastic Spülwanne with a butyl adhesive layer, and additionally applied thereto insulating layer such as a bitumen mat outside, that is on the side facing away from the interior of the washing compartment, is provided.

Instead of a bitumen mat can be provided in the various, in particular explained above, advantageous embodiments of the invention optionally also another Schwermatte or Dämmmatte advantageous as a further layer which rests on the respective base layer of butyl material, in particular butyl adhesive.

According to a further advantageous embodiment variant, it may be expedient to use an acrylate adhesive instead of the butyl adhesive. In particular, the butyl adhesive, the base layer 10 and / or the second adhesive layer 21 of the various embodiments of the Fig. 1 to Fig. 7 each be replaced by a Acrylatkelber. By acrylic material are meant in particular those substances which are distinguished by the acrylic group (CH ₂ = CH-COR) (such as acrylic acid or acrylic acid ester) or polymers of these substances.

For a better adhesion of the butyl adhesive, or acrylate adhesive, on the respective wall part to be insulated, it may be particularly expedient to additionally roughen the surface thereof prior to the application of the butyl adhesive or acrylate adhesive. This can preferably be achieved by plasmaizing the surface of the wall part.

Tests have shown that the butyl adhesive, compared to the acrylate adhesive, when applied to a plastic wall part has higher material safety, to prevent discoloration of the plastic material of the wall part. This is advantageous in household appliances, in particular dishwashers, preferably on the parts of the wall visible from the outside for an operator in order to be able to ensure a desired aesthetic, high-quality overall impression of the respective domestic appliance.

LIST OF REFERENCE NUMBERS

1

dishwasher

2

casing

3

rinse tank

4

component

5

Component wall made of plastic

6

bottom wall

7

door

8th

loading opening

9

Door inner wall

10

base layer

13

inner space

14

outside

15

Door outer wall

16

cavity

17

damp course

18

Plastic or metal foil

19

adhesive film

20

support film

21

adhesive layer

22

layer

S-S

line

Claims (6)

1. Domestic appliance, in particular a domestic dishwasher (1), with a component (4) having at least one component wall (5) made of plastic,
   characterised in that

   - at least one side of the component wall (5) of the component (4) is provided with a base layer (10) made of a butyl adhesive or an acrylic adhesive,

   - an adhesive foil (19) is present on the component wall (5) and has a carrier foil (20) and a base layer (10) made of the butyl adhesive or the acrylic adhesive, wherein the base layer (10) has a layer thickness between 0.2 and 2 mm, preferably between 0.5 and 1.5 mm,

   - the adhesive foil (19) is glued to the side of the component wall (5) by its base layer (10) made of the butyl adhesive or the acrylic adhesive,

   - the adhesive foil (19) is a double-sided adhesive foil (19a),

   - an outer adhesive layer (21) made of a butyl adhesive or acrylic adhesive is present on the side of the carrier foil (20) facing away from the component wall (5) and

   - a second, in particular heat-insulating, layer (22) is connected in a substance-to-substance bond to the outer adhesive layer (21).
2. Domestic appliance according to claim 1, characterised in that the component wall (5) consists of one or more polyolefins.
3. Domestic appliance according to claim 2, characterised in that the component wall (5) consists of polypropylene.
4. Domestic appliance according to one of the preceding claims, characterised in that the component wall (5) is a part of a device door (7) of a domestic dishwasher (1).
5. Domestic appliance according to one of claims 1 to 3, characterised in that the component wall (5) is a cavity wall of a dishwasher cavity (3) of a domestic dishwasher (1).
6. Domestic appliance according to one of the preceding claims, characterised in that the surface of the side of the component wall (5), on which the butyl adhesive or the acrylic adhesive is applied, is roughened, in particular plasmatised.

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