EP1194056B1 - Method of producing multi-layered bristle material, multi-layered bristle and its use - Google Patents

Description

The invention relates to a method for producing multilayer bristle material consisting primarily of a the bendability of the core determining the bristle, a covering that primarily determines the brushing effect an endless material and an intermediate layer by the Core made by extrusion, with the intermediate layer from a liquid to viscous phase and then the continuous material on the intermediate layer under partial Embed is applied in the same.

The invention relates to lot material, as for Manufacture of brushes for cleaning, polishing, or Applying media, for brushes, interdental cleaners or Like. Is used. The effect of a bristle or consisting of several bristles and / or bundles of bristles Bristle trim depends on the one hand on the choice of material, on the other hand the constructive structure of the bristle and in particular from their surface. The ends play the bristles essentially only when cleaning or when Penetration into crevices, cavities etc. matter the majority of the effective part of the bristle through the bristle shaft is formed, which turns over when pressure is applied and a more or less wiping to scraping or even roughening effect. It therefore comes for them desired effect decisive on the surface structure of the bristle shaft.

This finding has led to a variety of bristle designs guided. So it is known (US 4,373,541), the surface structure a bristle directly geometrically. The manufacturing processes for such bristles are extraordinarily complex. There are also two-component bristles known (WO 97/25902, US 3,698,405), which consists of a or several monofilaments and a sheath enveloping them consist. Furthermore, it is known to use several monofilaments with one another twist to a bristle, twist or the like. (DE 1 222 888, DE 196 40 853, JP 32 89 906). Manufacturing of such bristle material is comparatively simple, however, the monofilament must be over glue or in some other suitable way Way connected to each other to create a stable Get composite. The final design is problematic such bristles, since they are not particularly round off what for many uses of bristles however is required.

Finally, bristles and interdental cleaners are known (DE 37 17 475, US 3,698,405), in which on a load-bearing Monofil core applied an adhesion-promoting layer and fibers are then flocked onto the damp layer become. The fibers are said to be substantially perpendicular to Surface. Such bristles could be new Generate effects and especially for absorption of order funds are used, however Short fibers too bad a hold on the monofilament surface, so that they loosen and fail over time. This not only leads to a reduction in the desired effect, but are the precipitating fibers on the treatment Surface highly undesirable. Such bristles in the hygiene area, for example in the mouth and Dental care used, unusual fibers lead to pronounced Inconveniences.

Bristles for toothbrushes are also known (JP 10 286 122 A), which consists of a nylon core as a monofilament and a on the circumference of which stiffening wire is applied, which either runs along a generatrix of the core or wound helically on the core. The Wire can also be made of nylon. The wire should stiffen the bristle, improve its resilience and extend the lifespan. About the type of fixation of the this says helically wound nylon wire State of the art nothing. Another bristle for Brush rollers are known (JP 6 321 680 A), a core from a multifilament made of nylon fibers and blended Abrasive particles in one or two layers with a monofilament To wrap polyamide fiber and then the winding to fix with an adhesive. With this version the brushing effect of the bristle is not insignificant from that of the fixing Adhesive affected because he applied later is. A bond between the multiple core and the wound There is no monofilament. It is therefore the monofilament with adjacent turns wrapped around a Avoid slipping towards the core.

Finally, it is known (DE 1 222 888 B) for technical Rotary brushes have a monofilament core with a stiffening Wrapping monofilament in one or more threads. To the core or the monofilament is previously an adhesive as an intermediate layer applied. The multi-stage production is complex. The Adhesion of the monofilament to the core depends on the fact that the Glue applied carefully and in a uniform layer thickness becomes. The wound monofilament should only be the core stiffen and protect while brushing exclusively to be generated by the core. The brush work is obviously done by the bristle tip.

The invention has for its object a method for Propose production of bristle material from which Bristles with a specific effect of the bristle shaft can be generated. Furthermore, with the invention a corresponding bristle can be created.

Based on the method according to the preamble of the claim 1 this problem is solved in that the core and the intermediate layer are co-extruded and the continuous material pre-stressed on the plastically deformable Intermediate layer applied and at least partially is embedded in the intermediate layer.

In contrast to the well-known three-component bristles the adhesion-promoting intermediate layer with the core material, which can consist of monofilament or multifilament, co-extruded and the intermediate layer first into one state in which the continuous material is transferred to the intermediate layer applied and on the occasion of the application the prestress at least partially into the intermediate layer is stored.

Is the intermediate layer softened accordingly and plastically deformable, the preload is sufficient to achieve this Endless material to be stored in the intermediate layer and immovable to keep.

Instead, it can be provided that the intermediate layer consists of a material that can be reactivated after processing is. In this case, the continuous material is on the dry, possibly also no longer deformable Intermediate layer applied. During or after application of the continuous material, the intermediate layer is reactivated and then incorporating the continuous material into yours solid phase returned.

By reactivating the intermediate layer becomes soft, so that the applied continuous material sinks somewhat. The Intermediate layer can also have an adhesive effect, for example consist of a hot melt adhesive, so that the continuous material is connected to the core by gluing. there However, it is always guaranteed that the through the continuous material given structure on the bristle shaft completely or is predominantly preserved and derives from the Forming continuous material does not loosen.

It is also possible to make an intermediate layer from one apply foamable material and the intermediate layer to foam after the application of the continuous material that the intermediate layer at least partially the continuous material surrounds and the continuous material in this way in the Intermediate layer is stored. It can also be a deeper one Storage should be provided if the intermediate layer consists of a soft foam, which corresponds to the pressure yields and thereby exposes the continuous material becomes.

Since monofilaments for bristles have to be stretched in order to Giving bristle the necessary bending stiffness is all in one another variant of the method according to the invention is provided, that the core co-extrudes with the intermediate layer and stretched and only then the endless material is applied. If necessary, the Core with the intermediate layer and the continuous material applied be stretched again.

According to a further embodiment it is provided that after the application of the continuous material to the intermediate layer a film is applied at a given strong Profiling through the continuous material a smoothing of the Profile.

It can further be provided that after the application of the Endless material on the intermediate layer the bristle material is treated on the outside. This can be a mechanical processing, diving or whatever Apply application media. A mechanical one Editing can consist of at least the continuous material on partial lengths of the bristle material in the longitudinal direction is cut open so that free fiber ends with appropriate Cleaning, polishing or the like. arise.

A textile material is preferably used as the continuous material applied that a smooth or roughened surface can have. This is the first time a combination of Plastic monofilaments with a textile material on the outside given that there is sufficient adhesion to the intermediate layer having. The textile material can be wound up or be chained up.

If an absorbent textile material, for example a roughened yarn or the like are used diverse care and cleaning options, however also the introduction of liquid to fine powdery media, which are returned when used.

The continuous material can also be made of a metallic Fine wire or made of a plastic monofilament with abrasive Properties exist.

The invention further relates to a multilayer bristle, which primarily determine the bending ability Kern, a covering that primarily determines the brushing effect from a continuous material and an intermediate layer for Mediation exists. Such a bristle stands out according to the invention in that the core and the intermediate layer are co-extruded and the coiled or chained Endless material at least partially in the plastically deformed intermediate layer is stored under tension.

The intermediate layer preferably consists of a softer one Material as the core, which consists of a monofilament or multifilament can exist. The intermediate layer can in particular consist of a rubber-elastic material, which is a storage of the continuous material solely by prestressing it allows when winding. The same applies to an intermediate layer made of a foamed material.

The bristle designed according to the invention can be used for a variety of purposes Uses, e.g. for the bristle trim of bristles or brushes. She can do it alone serve as an interdental cleaner. Finally she lets up advantageously for devices, especially brushes or use a brush to apply liquid or powdery media that are then used in the textile material are stored.

Figur 1

eine perspektivische Ansicht eines Abschnitts des Borstenmaterials in einer ersten Ausführung;

Figur 2

einen Querschnitt des Borstenmaterials gemäß Figur 1;

Figur 3

eine Längsansicht des Borstenmaterials in einer anderen Ausführung und

Figur 4

einen Querschnitt eines Borstenmaterials in einer weiteren Ausführungsform.

The invention is described below with reference to exemplary embodiments which are shown in the drawing. The drawing shows:

Figure 1

a perspective view of a portion of the bristle material in a first embodiment;

Figure 2

a cross section of the bristle material according to Figure 1;

Figure 3

a longitudinal view of the bristle material in another embodiment and

Figure 4

a cross section of a bristle material in a further embodiment.

1, the bristle material has 1 the flexibility of the finished bristle in the essential determining core 2 from a single or several plastic monofilaments. On the core 2 is one Intermediate layer 3 applied, which preferably consists of a softer material. On the intermediate layer again is a continuous material 4, e.g. from a natural or synthetic textile material applied, at least on its side facing the intermediate layer in this is stored so that the continuous material 4 on the Intermediate layer 3 is fixed. Of course it can too several continuous fibers wound in parallel or crosswise his.

In the embodiment according to Fig. 3 shows the bristle material 1 again a core and an intermediate layer on which the continuous material 4 is not only wound, but is also linked at the same time. Here, as well 1 and 2 is the continuous material in the bristle material by appropriate preload in the intermediate layer be stored. Instead, or in addition, you can the intermediate layer also consist of a material that by an activation process, e.g. by exposure to heat, undergoes a change in state, causing the storage of the continuous material takes place or is supported.

The core can be any, adapted to the application Have cross-sectional shape. An embodiment is shown in Figure 4. The bristle material 1 has one approximately rhombic core 5, on which the intermediate layer 6 is applied, which at the same time the covex spaces of core 5 fills. The continuous material is then on this intermediate layer angry, e.g. wound up or chained up. A bristle made from the bristle material. Fig. 4 points out the profiling of the core 5 preferred bending directions on. Due to the convex filled with the intermediate layer Areas, the wear behavior can be influenced. Furthermore, the one sought by the continuous material Effect of the bristle shaft on the circumference of the bristle varies brought to bear.

Claims (20)

1. Method for the manufacture of multilayer bristle material (1), comprising a core (2) mainly determining the bending capacity of the bristle, an overlayer of a continuous material (4) mainly determining the brushing action and an intermediate layer (3), in that the core (2) is produced by extrusion, provided with the intermediate layer (3) from a liquid to viscous phase and then the continuous material (4) is applied to the intermediate layer (3), accompanied by a partial binding into the same, characterized in that the core (2) and intermediate layer (3) are coextruded and the continuous material (4) is applied under pretension to the plastically deformable intermediate layer (3) and at least partly incorporated into the intermediate layer (3).
2. Method according to claim 1, characterized in that the intermediate layer (3) is of a material which is reactivatable after processing and that following the application of the continuous material (4) the intermediate layer (3) is reactivated and subsequently is returned to its solid phase accompanied by an at least partial binding in of the continuous material (4).
3. Method according to claim 1, characterized in that an intermediate layer (3) of a foamable material is applied and is foamed following the application of the continuous material (4).
4. Method according to one of the claims 1 to 3, characterized in that the core (2) is coextruded and stretched together with the intermediate layer (3) and then the continuous material (4) is applied.
5. Method according to one of the claims 1 to 4, characterized in that the core (2) with the intermediate layer (3) and the applied continuous material (4) is afterstretched.
6. Method according to one of the claims 1 to 5, characterized in that following the application of the continuous material (4) to the intermediate layer (3), the bristle material (1) is externally aftertreated.
7. Method according to one of the claims 1 to 6, characterized in that the continuous material (4) is cut up longitudinally at least on partial lengths of the bristle material (1).
8. Method according to one of the claims 1 to 7, characterized in that a film is applied to the continuous material (4) following the application of the latter to the intermediate layer (3).
9. Method according to one of the claims 1 to 8, characterized in that a textile material is applied as the continuous material (4).
10. Method according to one of the claims 1 to 9, characterized in that a smooth or roughened textile material is applied as continuous material (4).
11. Method according to claim 9 or 10, characterized in that textile material is wound up.
12. Method according to one of the claims 9 to 11, characterized in that textile material is looped up.
13. Method according to one of the claims 9 to 12, characterized in that an absorbent textile material is applied.
14. Multilayer bristle, comprising an extruded core (2) mainly determining the bending capacity, an overlayer of a continuous material (4) mainly determining the brushing action and an intermediate layer (3) for adhesion promotion purposes, characterized in that the core (2) and intermediate layer (3) are coextruded and the wound or looped up continuous material (4) is at least partly incorporated into the plastically deformed intermediate layer under pretension.
15. Bristle according to claim 14, characterized in that the intermediate layer (3) is of a softer material than the core (2).
16. Bristle according to claim 14 or 15, characterized in that the intermediate layer (3) is of a rubbery material.
17. Bristle according to one of the claims 14 to 16, characterized in that the intermediate layer (3) is of a foamed material.
18. Use of a bristle according to one of the claims 14 to 17 for the bristle configuration of brushes or paintbrushes.
19. Use of a bristle according to one of the claims 14 to 17 as an interdental cleaner.
20. Use of a bristle according to one of the claims 14 to 17 for implements, particularly brushes or paintbrushes, for the application of liquid or pulverulent media, which are incorporated in the textile material.

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