EP3007581B1 - Flat touch-and-close fastener element and cleaning system comprising such a flat touch-and-close fastener element - Google Patents

Description

The invention relates to a sheet-like adhesive closure part having the features in the preamble of claim 1.

An adhesive closure part for an adhesive closure is known from the patent DE 102 40 986 B3 known.

Woven adhesive closure parts whose warp, weft and pile threads can be made entirely of textile fibers, but also of plastic or metal fibers, are freely available on the market in a large number of embodiments. The pile threads form in the base fabric of warp and weft threads loop-shaped interlocking elements. The mentioned threads of the thread system may consist of multifilament threads or multifilament yarns, and in particular the pile threads are formed from monofilament or monofilament yarns, one can cut open the thermally closed pile thread loops or thermally separated from each other, so as to obtain resistant closure hook, which can be brought into releasable engagement again are with a correspondingly formed loop-loop material of the other closure part.

If thermally treated in the separation process, the free loop ends, for example, melts, caused by the residual stress behavior of the molten plastic material during subsequent curing mushroom-shaped closure heads as closure elements. Furthermore, it is also possible to releasably engage pertinent hook or mushroom-shaped closure elements with felt-like adhesive closure parts and formation of the adhesive closure as a whole.

With the adhesive closure systems known in this regard, very good peel strength values can be achieved, i. H. Relatively high forces are necessary in order to disassemble the sheet-like corresponding adhesive closure parts, which as a whole form the adhesive closure, in order to release the connection, which is basically desirable.

In the known solutions come as thread and yarn systems in addition to textile fiber material and plastic materials, in particular in the form of nylon or polypropylene material used. Furthermore, in the known solution also shown to use metallic thread systems. Basically, it is the case that in the case of the respectively known closure material, only one production material is used continuously for the entire thread system.

It has now been found in practice that when using the known thread or yarn material consisting of a manufacturing material quite a good basic stability for the entire fabric and in particular the pile threads not readily from the base fabric via a corresponding hook and loop fastener material when the adhesive closure pull out what would in the long term unintentionally affect the functionality of the adhesive fastener; However, when using stinging stable thread systems, it has been shown that they lose their adhesive or blocking properties during frequent washing, in particular if high temperatures are used for disinfecting or sterilizing reasons for the washing medium, wherein the detergent used in each case often proves to be very aggressive towards the textile and plastic materials used for the thread system.

The invention further relates to a cleaning system using such a sheet-like adhesive closure part, wherein such cleaning systems in the vernacular also referred to as mop. If such mop cleaning systems are used, for example, in hospitals, there are increased requirements regarding disinfection and sterility. Thus, the flat wiping material used for the cleaning system, which is provided on the back with the sheet-like adhesive closure part for connection to a manually operable holder with a corresponding adhesive closure part, the holder preferably via a stem part can be moved along a floor surface to be cleaned, within the expected life can endure at least 500 wash cycles with daily washes. Furthermore, even with such cleaning systems, the adhesive closure part used in each case for use suitably robust designed to meet the usual abrasion or the fabric delamination effectively.

The known adhesive closure systems with the attributable cleaning systems meet these requirements only imperfectly, which is reflected regularly in a short life of the products.

The DE 87 09 084 U1 describes a sheet-like adhesive closure part which is connected in particular to form an adhesive closure in a detachable manner with another adhesive closure member and which consists of a thread system, comprising at least warp and weft threads and pile threads, wherein the individual threads have different chemical and / or physical properties and for this consist of different materials.

Further sheet-like adhesive closure parts go out of the EP 0 780 066 A2 , of the EP 1 949 810 A2 , of the DE 20 2006 002 409 U1 and the JP 2009-285179 A out.

Based on this prior art, the present invention seeks to further improve the known sheet-like adhesive closure parts and assignable cleaning systems using such Haftverschlussteile to the effect that they prove to be robust and durable in operation and in particular a variety of cleaning processes go through can, without causing a delamination of the thread-tissue system.

A related object solves a sheet-like adhesive fastener with the features of claim 1 and a cleaning system using such adhesive closure member according to the feature configuration of claim 9.

To achieve this object is provided according to the invention in a sheet-like adhesive fastener that wefts that extend over a longer thread length than long weft threads within the thread system, made of polyamide and that the contrast of shorter falling partial wefts are made of polyester or predominantly pending plastic materials exhibit.

It is further provided that the individual threads of the thread system have different chemical and / or physical properties, and for this consist of different materials, in particular in the form of plastic materials.

The mentioned polyamide thread is to be regarded as relatively rough in the microscopic range from its surface structure and thus offers a good attack base for finishes which are used regularly to help improve cohesion within the backing fabric consisting of the warp and weft yarns. However, the plastic material polyamide in turn is generally regarded as hydrophilic, in particular polyamide swells under water access softer and softened with the result that the stability of the thread system is less when water enters, so that a purely composed of polyamide materials thread system for the adhesive closure part itself is not very suitable for frequent washing cycles in the long term. If disinfectants and sterilizing agents are used together with the wash water, which regularly have a strong oxidizing effect such as perchlorates and peracetic acids, the resistance of the polyamide again turns out to be low since polyamide regularly has molecular endogenesis via so-called amino end groups which are combined with the disinfecting and sterilizing agents mentioned In a chemically reactive manner end products are received, which degrade the polyamide in the thread system accordingly.

In contrast, polyester as a synthetic resin material with regularly smooth surface structure proves to be hydrophobic tissue-entry material, which also has no functional amino groups, so that frequent washing using disinfecting and sterilizing agents can not harm the polyester thread material. In particular, there are no chemical degradation compounds because the polyester has no functional groups, in particular no amino end groups in the molecular structure. Due to the smooth surface structure of the polyester thread material, however, there is no physical adhesion of the already mentioned finishing material, which mechanically only encloses the respective polyester fiber and can be easily broken off from there again under mechanical stress.

It is surprising to a person of ordinary skill in the art of adhesive fastening technology that it can be achieved by the targeted selection of thread or thread Yarn materials for partial thread systems of a total thread system in a wide range of functional properties of the adhesive closure part, respectively for the adhesive closure material, can set freely. This also includes that by additional or alternative introduction of electrically conductive fiber material, for example in the form of carbon fibers, the static dissipation for the adhesive closure part can be improved. If metal threads are introduced into the overall fiber composite system with a predeterminable electrical resistance value, it is possible to achieve a heating of the adhesive closure material by connecting the metal threads to a corresponding current source. The heat input can serve to kill microorganisms in the closure material of the adhesive closure part, so that even in this direction the highest disinfection and sterilization requirements can be fulfilled without further ado.

Particularly advantageous has been found, in particular when using the sheet-like adhesive closure part according to the invention in a so-called mop those weft threads of the thread system that extend over a longer thread length as a so-called long-weft made of polyamide and contrast precipitate shorter part weft threads made of polyester. Further, it has been found to be advantageous to form 50% of the polyester pile threads used within the thread system and the other 50% piece of polyamide threads or yarns. Of course, here also other percentage compositions, for example 40% polyamide to 60% polyester within the thread composite system, find application.

For the base fabric consisting of the warp and weft threads, the usual fabric connections, but also knitted and knitted material can be used. Particularly preferably, however, the thread system is made raschel, the rustling on a Raschelmaschine represents a development of the known warp knitting. Details on Raschel machines can be found, for example, in the Large Textile Encyclopedia, published by the Deutsche Verlagsanstalt Stuttgart, as well as in the introductory handbook textile production processes, published by the Carl Hanser Verlag, Munich.

For an improved connection of the monofilaments or individual yarns, it is provided that the thread system is provided with a finish on its side facing away from the pile threads, ie on its back side. For example, a solvent-free, moisture-crosslinking hotmelt adhesive based on reactive polyurethane prepolymers containing at least one polyesterpolyol in a concentration of between 10 and 90%, optionally polyetherpolyol in a concentration of 0 to 50% and at least one polyisocyanate in a weight concentration between 5, can be used as the finish and 35%. The polyurethane material used in this way leads to a strong arrest of the individual binding components with each other in the thread system, so that withdrawal of individual threads, in particular the pile threads from the basic texture out is certainly prevented.

Fig. 1

einen rechteckförmigen, perspektivisch dargestellten Ausschnitt aus einem Teil des erfindungsgemäßen flächenförmigen Haftverschlussteils ohne Appretur;

Fig. 2

des besseren Verständnisses wegen einen Ausschnitt aus dem Fadensystem nach Fig. 1, nur mit einem Kettfaden und vier Teilschussfäden, die durch den Kettfaden in ihrer Schussrichtung positioniert sind, wobei sich der dahingehende Rapport nach vier Teilschussfäden wiederholt;

Fig. 3

ein Teilfadensystem aus der Darstellung nach der Fig. 1 entnommen mit zwei nur teilweise dargestellten Kettfäden, einem Teilschussfaden sowie einem eingebundenen Polfaden in den in Blickrichtung auf die Fig. 3 rechts dargestellten Kettfaden;

Fig. 4

eine Draufsicht auf den Teilausschnitt eines Fadensystems nach der Fig. 1, wobei zumindest die Polfäden aus sogenannten Multifilamentfäden oder -garnen bestehen;

Fig. 5

in der Art einer Explosionszeichnung das zuunterst angeordnete Wischmittel, das sich über einen Haftverschluss mit dem zuoberst dargestellten Halter verbinden lässt;

Fig. 6

einen vergrößert wiedergegebenen Teilausschnitt des Halters nach der Fig. 5, der dort von einem Kreis X umschlossen ist; und

Fig. 7

einen Längsschnitt entlang der Linie Y-Y in Fig. 6.

The adhesive closure part according to the invention, together with its use in a cleaning system according to an exemplary embodiment according to the drawing, will be explained in more detail below. This show in principle and not to scale representation of the

Fig. 1

a rectangular section in perspective of a portion of the sheet-like adhesive closure part according to the invention without finish;

Fig. 2

for better understanding because of a section of the thread system Fig. 1 only with one warp thread and four part weft threads, which are positioned by the warp thread in their weft direction, wherein the pause repeat repeats after four part weft threads;

Fig. 3

a partial thread system from the illustration after Fig. 1 taken with two only partially shown warp threads, a part weft thread and a tied pile thread in the direction of the Fig. 3 right-side warp thread;

Fig. 4

a plan view of the partial section of a thread system according to the Fig. 1 , wherein at least the pile threads consist of so-called multifilament threads or yarns;

Fig. 5

in the manner of an exploded view, the lowest placed wiper, which can be connected via an adhesive fastener with the holder shown at the top;

Fig. 6

an enlarged reproduced partial section of the holder after the Fig. 5 which is enclosed there by a circle X; and

Fig. 7

a longitudinal section along the line YY in Fig. 6 ,

As already mentioned above, the shows Fig. 1 a rectangular section shown in perspective of a part of the sheet-like adhesive closure part according to the invention without finish application. The pertinent adhesive adhesive closure part can be connected in a detachable manner, in particular with the formation of an adhesive closure, to a further adhesive closure part, which will be described in more detail below with reference to a cleaning system. The adhesive closure part has a thread system designated as a whole with 10, consisting of warp threads 12, which point in the direction of the Fig. 1 seen in vertical Extending direction and consisting of weft threads 14, which in contrast extend in the horizontal direction and in the form of pile threads 16 which extend in the basic composite system of warp and weft threads 12, 14 along.

Within the thread system 10, long weft threads 18, which preferably extend over the entire length or width of the overall thread system, extend over a longer thread length. In addition to these long weft threads 18, which in the direction of the Fig. 1 Seen in the vertical direction at equidistant intervals are arranged to each extend parallel to four part weft threads 20, 22, 24 and 26, in which case the observed in the weft repeat repeats itself by incorporating the first part weft thread 20 and each other part weft thread 22, 24, 26 , The pertinent structure is due to the better representation in the Fig. 2 reproduced, wherein the individual part weft threads are shown with different ruling next to the warp thread 12. The looking in the direction of Fig. 2 Seen vertically extending warp thread 12 forms a multi-loop system and between adjacent loops of the warp 12 pass through the four part weft threads 20, 22, 24, 26 with appropriate involvement the pertinent warp 12. From the fourth part weft thread 26 then repeat the rapport starting with the first part weft thread 20 and, as in the direction of the Fig. 2 is shown on the right, ending with the fourth part weft thread 26. It is preferably provided that according to the illustration according to the Fig. 1 there is a separate warp thread system 12 for each partial weft thread.

In particular, according to the illustration of the Fig. 3 For example, the double binding between two adjacent warp threads 12 is shown for one of the part weft threads 20. Furthermore, the shows Fig. 3 the incorporation of a loop-forming pile thread 16 in the right warp thread system 12. Substituting the binding structure according to Figures 2 and 3 in a noticeable way together, then gives the overall pattern as shown by the Fig. 1 ,

In order to achieve the different functionalities for the thread system, it is provided that the warp threads 12 are all made of polyester material, and one part of the pile threads 16 consists of polyamide and the other half of the pile threads 16 preferably made of polyester. Furthermore, the long-floating, over the entire bond extending long weft threads 18 are constructed of polyamide plastic material, whereas the part weft threads 20, 22, 24, 26 are preferably made of polyester or have pending polyester materials. Depending on the context in which you want to set the mentioned functionality of the individual components, other material combinations are also used here.

Like the others Fig. 4 shows, is provided in a particularly preferred embodiment of the adhesive closure part according to the invention that at least the pile threads 16 consist of so-called multifilament yarns, ie a single thread or yarn is divided into a plurality of individual filaments, which also form a loop shape and are particularly well suited, with a corresponding closure material, for example in the form of closure hook, cooperate for a releasable adhesive closure. In contrast, in the illustration according to the Fig. 4 Both the warp yarn systems 12 and the weft yarn systems 14 with the long weft yarns 18 and the part weft yarns 20 or 22, 24 and 26 configured as monofilament each. In one embodiment, not shown, but it is also possible for a further improved adhesion, the pertinent warp and weft threads 12, 14 also introduce as multifilament threads in the bond.

The in the FIGS. 1 and 4 By way of example, adhesive closure parts with their fabric or knit composite can be produced on so-called Raschel machines, which are not shown in detail and which belong generically to the so-called warp knitting machines. Such Raschel machines regularly have two rows of latch needles and six rows of punch needles, wherein both the latch needles and the needles are firmly bonded, in particular summarized in the form of so-called needle bars or guide rails. The PROGRAMMING, APPLYING and BREAKING functions are performed by relative movement to the needle bar, a stationary knock-over comb, which has comb-like cut-outs for the needle passage at the upper end. The threads are then combined into chains, especially in Raschel machines presented as warp beams or sub-warp beams. The threads are then fed to the needles through the laying rails, the warp beams being driven separately. The Raschel knit fabric produced in this way is then pulled off in the lower part of the machine frame by a peeling device and made available for later use (see Large Textillexikon, Deutsche Verlagsanstalt Stuttgart).

To the weave according to the representations of the FIGS. 1 and 4 be able to ensure between the monofilaments of the overall thread system 10, they are provided on the opposite side to the pile threads 16 with a finish, preferably in the form of a two-dimensionally applied polyurethane material. In addition to the threads presented, other threads may also be used, in particular with a line-shaped configuration, which are flame-retardant and / or electrically conductive and / or heat-conducting and / or increasing the strength value. In addition to metal threads, the use of nylon or carbon threads or of flame-retardant thread systems is also possible here. That's the way to go For example, replace part of the described part weft yarns by such other thread. In principle, the use of so-called bicomponent fibers in the overall thread structure 10 is conceivable.

The Fig. 5 now shows the use of the adhesive closure part according to the invention in a cleaning system, in particular in the manner of a mop, in which a flat wiping material 30, including a plurality of wiper loops 32, for example made of a cotton material, provided on the back 34 with the thread system 10, in particular along the longitudinal and transverse seams 36 and 38 is sewn thereto. To represent both the front and the back of the wiping material in the form of the wiper, is on the left half of the Fig. 5 the front of the wiper material shown and folded down on the right side of the same. That in the Fig. 4 Thread system 10 shown by way of example is then on the right side of the image Fig. 5 facing the viewer and capable of engaging with two hook and loop strips 40 extending along the underside of a holder 42 from one side 44 thereof to the other side 46, respectively, to form a releasable adhesive closure. The holder 42 is preferably made of an aluminum or plastic profile material, wherein the individual Velcro strips 40 with the protruding hook material 48 as a further closure member 50 in the manner of a hollow profile 52 (see. Fig. 7 ) can be deducted from the holder 42 so as to be easily replaced in the event of failure on the holder and / or simply washed on the separable hollow section 52 or otherwise cleaned. In particular, the holder 42 can then be replaced immediately when the respective hollow profiles 52 are replaced. On its upper side, the holder 42 is provided with a handle part 54, wherein in the embodiment shown a pertinent holder 42 can be used with handle part 54, for example, for cleaning window or work surfaces. Is the stem part 54 on the holder 42 extended accordingly (not shown), This cleaning system can also be used to clean floors of any kind and their floor coverings without further ado. If the wiping material 30 is worn or dirty, the pertinent wiper material or wiping means 30 can be exchanged for a new part via the illustrated Klett® connection system. The used or soiled wiping material 30 can then be washed and preferably used in disinfected form again for re-cleaning operations as part of the described cleaning system with holder 42.

Claims (9)

1. Sheet-like hook and loop fastener member that, in particular to form a hook and loop fastener, is attached in a releasable manner to a further hook and loop fastener member and that consists of a thread system (10), comprising at least warp and weft threads (12; 14) together with pile threads (16), wherein the individual threads (12, 14, 16) have different chemical and/or physical properties and therefor consist of different materials, characterised in that those weft threads that extend over a longer thread path as long weft threads (18) within the thread system, are formed from polyamide and the shorter part weft threads, in contrast (20, 22, 24, 26) are formed from polyester or predominantly plastic materials.
2. Hook and loop fastener member in accordance with claim 1, characterised in that the warp threads (12) are of polyester and at least part of the pile threads (16) consist of polyamide.
3. Hook and loop fastener member in accordance with claim 1 or 2, characterised in that a part of the pile threads (16) used consist of polyester and another part of polyamide.
4. Hook and loop fastener member in accordance with one of the preceding claims, characterised in that, within the weave of the thread system, for each warp thread run a part weft thread (20, 22, 24, 26) is likewise woven in as two pile fibres (16) and that, after four warp thread runs (12), the weave pattern is started from new, starting with a first part weft thread (20).
5. Hook and loop fastener member in accordance with one of the preceding claims, characterised in that all threads (12, 14, 16) of the thread system are formed from multifilaments.
6. Hook and loop fastener member in accordance with one of the preceding claims, characterised in that the thread system (10) is manufactured on a raschel machine.
7. Hook and loop fastener member in accordance with one of the preceding claims, characterised in that the thread system (10) is provided with a finish on its side remote from the pile fibres, preferably incorporating polyurethane material.
8. Hook and loop fastener member in accordance with one of the preceding claims, characterised in that the thread system (10) has linear elements, in addition to the existing threads or as at least partial replacement for them, which are flame-retardant and/or electrically conductive and/or thermally conductive and/or strength increasing.
9. Cleaning system, in particular in the form of a mop, in which a flat mop material (30), that is provided on the back with the hook and loop fastener member in accordance with one of the preceding claims, is attached in a releasable manner with a hook material (48) as further hook and loop fastener member, that is part of a holder (42) operable by hand, which preferably can move along a floor surface to be cleaned by means of a holder member (54).

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