EP3086682A1

EP3086682A1 - Flame-resistant closure piece, and flame-resistant finish or coating

Info

Publication number: EP3086682A1
Application number: EP14818869.1A
Authority: EP
Inventors: Konstantinos Poulakis
Original assignee: Gottlieb Binder GmbH and Co KG
Current assignee: Gottlieb Binder GmbH and Co KG
Priority date: 2013-12-27
Filing date: 2014-11-19
Publication date: 2016-11-02
Also published as: US20160309856A1; US20190254387A1; JP2017501811A; WO2015096877A1; CN105848512A; DE102013022112A1; JP6594882B2

Abstract

Disclosed is a flame-resistant closure piece that is adapted to a corresponding closure piece such that a detachable closure is formed. Said closure piece comprises a least one flat basic fabric (14) consisting of warp threads (10) and weft threads (12), and functional elements (18) that protrude on the front side of the basic fabric (14). The basic fabric (14) is provided with a flame-resistant finish. The disclosed flame-resistant closure piece is characterized in that the basic fabric (14) and the functional elements (18) are predominantly, preferably entirely, made of flame-resistant plastic materials.

Description

T EP2014 / 003085

1

Flame retardant closure and flame-retardant finish or infeed

The invention relates to a flame-retardant closure part, which is adapted to form a re-releasable closure to a corresponding closure part, with at least one planar-shaped base fabric of warp and weft threads and with on the front of the base fabric protruding functional elements, wherein the base fabric with a flame retardant Finishing is provided. The invention further relates to a flame-retardant finish or coating for a closure part, in particular for the above-mentioned closure part.

EP-B-0 883 354 discloses a flame retardant fastening element, in particular a closure part, which is adapted for a detachable engagement with a second fastening element, comprising: a backing layer of a flame retardant polymeric material having an exposed bonding surface and a bearing surface;

a plurality of flexible, resilient stem portions as functional elements extending generally perpendicular to the bonding surface, the distal stem portions having an enlarged head portion disposed at a distal end of the stem portion, the enlarged head portion having an upper surface opposite the distal stem portions , and one of the connecting surface opposite locking surface, and the head portions are arranged such that they allow movement along different portions of the carrier layer and in a releasable engagement with the second fastening element; and

a non-flame retardant, pressure-sensitive adhesive applied to the support surface.

The known fastener thereby meets the requirements of FAR 25.853 (a) (1) (i) vertical flammability test without attachment to a substrate. The relevant provision or specification relates to such fastening systems, which relate in particular to applications in the driving and aircraft technology and serve for example the fastening of wall panels to the support structure of a cabin of a rail vehicle or the determination of seat cover materials on passenger seats and the like. In particular in the field of aircraft engineering increased demands on today flammability to that effect fastening systems, which are significantly higher Kings ^¬ nen as the information in the above specification. In the known solution described above, moreover, in a preferred embodiment, the non-flame-retardant, druckemp ^¬ sensitive adhesive is a foam layer of a pressure-sensitive acrylic foam adhesive, adhesive thus constructed are described in more detail by way of example in WO-A-2005/017060. The known solution already forms a very good-looking flame-retardant closure; However, the known solution may be expensive to implement, especially as regards the introduction of the U-shaped fasteners in the carrier layer. In addition to the use of conventional plastic materials as indicated above in the form of polyethylene, polyamide or the like for the 3 003085

Final material is also shown in EP-B-0 883 354 for the realization of a flame-retardant closure, the use of carbon material. In this known solution is provided to form a flame-retardant closure or closure member that both the loops 5 and the base material of the loop portion as a base fabric, from which the loops protrude as functional parts or functional elements made of carbon fibers. The hooks of the hook part itself should accordingly be formed of wire. Although in the known solution both the loop part and the hook part as a further functional element a

T o textile character, so that they can be processed as usual textile adhesive closures, in particular can be sewn, their flame resistance is far above that of textile closures conventional type, namely at about 1,000 ° C. However, the use of carbon fiber material has again proved to be very cost-intensive since carbon material is used

From today's point of view, this is only available to a limited extent in processing plants in sufficient quantities and at reasonable prices.

In order to counter these disadvantages, EP-B-1 973 440 has already proposed a flame-retardant closure with at least one

20 closure part with at least one planar-shaped base fabric of warp threads and weft threads and with on the front of the base fabric protruding functional threads that pass through the base fabric at least partially and form the individual closure elements, the base fabric is of non-flame retardant type and

25 has on its back as a coating at least partially a carrier layer with a flame-retardant medium and / or with an active extinguishing medium, wherein the base fabric has a finish and wherein the carrier layer on its side facing away from the base fabric, a connection component, for example in the form of an adhesive 4 EP2014 / 003085

If the addressed carrier layer is preferably made of a flame-retardant material or with an active quenching medium, wherein both material properties can be achieved with only one carrier layer, the flame retardant material for the carrier layer may preferably be selected from the following substance groups:

- Ammonium phosphate (AP)

- Ammonium polyphosphate (APP)

- Aluminum trihydroxide (ATH)

- Magnesium hydroxide (MDH)

- resorcinol bis-diphenyl phosphate (PDP)

- Red phosphorus (RP)

Tri-n-butyl phosphate (TBP)

- tricresyl phosphate (TCP)

Triphenyl phosphate (TPP)

- melamine.

This known closure, together with the closure part and the base fabric applied finish, also satisfies increased flame resistance criteria, as exemplified in the specification AIMS 04-19-002 (January 2005 issue) of Airbus S.A.S. are shown under the title Hook and loop tape, non self-adhesive flame propagation resistant; Material Specification. Despite these advantages regarding the flame retardancy of the desired closure and finish, this known solution is still complex and, in particular when using the active extinguishing media described in more detail above, correspondingly high costs are to be expected in the realization.

On the basis of this prior art, the object of the invention is to provide a flame-retardant closure part together with a flame-retardant finish which can be used quite generally for closure parts while maintaining the advantages in the prior art, in particular To ensure a very high degree of flame retardancy, which meet the general criteria and specifications for flame retardancy, to further improve that they can be obtained in manufacturing technology easier and cheaper way. A pertinent object solves a flame-retardant closure part with the features of claim 1 and a flame retardant finish or coating according to the feature configuration of the independent claim 1 1. Advantageous further developments are the subject of the dependent claims.

According to the characterizing part of claim 1, the invention provides that the base fabric and the functional elements predominantly, but preferably completely, consist of flame-retardant plastic materials. This ensures that all necessary components for the construction of a closure part of flame-resistant materials, that is, the base fabric of warp and weft threads and the functional elements and the finish can be the default Krite ^¬ rien as FAR or AIMS test observe and easily fulfill , In this case, the selection of the finish according to the feature configuration of claim 1 1 is of particular importance. In particular, if the finish itself or a coating to be applied to the closure part is formed from a solvent-free, moisture-crosslinking hotmelt adhesive based on reactive polyurethane prepolymers, flame-retardant closure parts of any type can be generated in a functionally reliable and cost-effective manner. This has no equivalent in the prior art.

Both vertically and horizontally conducted flammability tests have shown that, essentially without afterburning or dripping, a once inflated closure part immediately extinguishes and, at the same time, largely ignites. partly still retains its functionality as a closure part of a total closure.

In addition to the selection of the finish, it is possible to create even more dependable, flame-retardant closures, provided that the warp and weft threads of the base fabric are made of PA66 plastic materials and used as thread material for the functional elements such as loops and / or mushroom hook elements PP Plastic materials used. Further improved results can then be achieved, provided that

PA66 and / or PP plastic materials existing filaments flame retardant additives that include phosphorus and / or triazine compounds and / or graphite. It is particularly preferred for the finish of the flame-retardant closure part or other closure parts to be used as a finish which comprises polyester-polyol or polyether-polyol to a significant extent within a hot-melt adhesive system. Especially when the hot melt adhesive is built with a formulation as follows ^¬:

- 10 to 90% polyester polyol

0 to 50% polyether polyol

5 to 35% polyisocyanate

- 2 to 50% flame retardants such as antimony and halogen-free phosphorus and / or triazine compounds and

- If necessary, additives such as catalysts and stabilizers, a finish is achieved, which meets the requirements for flame retardancy of the product in every way. The finish, or the hot-melt adhesive, can completely absorb the base fabric of warp and weft threads and to that extent also parts of the functional elements, if these are formed from pile threads, are at least partially woven into said base fabric; but it is also possible, in addition or alternatively, to apply the finish on the underside of a carrier part, which then carries the functional elements of a cast closure on its opposite upper side. If the base fabric is preferably taken up in said finish, an additional adhesive layer can additionally be provided on the underside of the closure part facing away from the functional elements, which is preferably also of low flame resistance and has a pressure-sensitive adhesive.

In the following, the flame-retardant closure part according to the invention will be explained in greater detail on the basis of an exemplary embodiment according to the drawing. In principle, not to scale: FIG. 1 shows the fabric image of an adhesive closure part in plan view;

2 shows a side view of the flat adhesive closure part according to FIG. 1.

Fig. 1 shows a detail of a plan view of a sheet-like adhesive fastener part, which can be arbitrarily extended within the image plane both in the one and in the other image direction, and the geometric dimensions of the fabric are dependent on the specifications of the weaving device on which the closure part is manufactured. In particular, closing parts which are used for later use are assembled in the manner of roll-bonded adhesive-fastening tapes (not shown). The closure part consists of warp threads 10 and weft threads 12, which weave together in transverse arrangement, the base fabric 14 for the adhesive closure part. Furthermore, the base fabric 14 is provided with functional threads 16 in the form of pile threads, which form a further constituent of the base fabric 14. The respective functional thread 16 then forms the individual functional or closure elements 18 for the sheet-like adhesive closure part, which will be explained in more detail below. Furthermore, one often speaks technical language instead of the threads used also of yarns.

Viewed in the direction of Fig. 1 is reproduced on its upper side with an arrow 20, the production direction for the produced closure part. 1, the respective weft threads 12 are arc-shaped in the manner of a sine or cosine wave, and at the intersections between warp threads 10 and weft threads 12, the warp threads 10 run parallel to the production direction 20 and parallel to one another in a straight line arrangement. In the embodiment shown in FIG. 1, only the weft threads 12 are arranged arcuately running in the base fabric 14, wherein the respective weft thread 12 engages in a sequential order a warp thread 10 and engages below the row immediately following. The advantages of a pertinent arcuate design are shown in more detail in DE-B-102 40 986 of the owner of the patent, so that will not be discussed in more detail here at this point.

At the location of the respective lower grip of the base fabric 14, the functional or pile thread 16 forms an overlying loop 22, wherein subsequently a further loop 24 is formed immediately, so that a type of V-bond is realized. But there are also other bindings 085

9 types of thinking conceivable, for example, the integration of the functional thread 16 in W-shaped type or the like.

Said loops 22, 24 form a type of closure elements 18, and if the loops 22, 24 remain closed as shown in FIG. 1, a loop-type adhesive closure part is created, with hook-type or mushroom-like closure elements in the loops 22, 24 thereof can engage so as to obtain a re-releasable adhesive closure as a whole in the context of a closure or fastening system. However, according to the representation according to FIG. 2, it is also possible to cut open the loops 22, 24 along a dividing line 26, so that in each case a mushroom-shaped closure element is produced after the free ends of the opened loop have melted, which is thus formed with corresponding fleece. or Velcro material of another closure part not shown in detail can catch in a detachable manner as the other closure part.

As further shown in the illustration of FIG. 2, a single weft thread 12 may also consist of a pair of weft threads or be multifilament. This also applies to the warp threads 10, which in accordance with the cross-sectional or elevational view of FIG. 2 in each case overlap a pair of weft threads 12 of the second closure part in an alternating sequence in order to subsequently undertake an undercut of this weft thread pair 12. The respective functional or pile thread 16 thereby engages with the omission of one pair of weft threads 12, the two subsequent weft pairs 12 in the row shown. On the base fabric 14, therefore, the loops of a first type 22 and another type 24 are arranged offset to one another, wherein the loops of the first type 22 form substantially closed O-shaped loops, and the loops of the second type 24 are V-shaped or U -shaped. A so-called repeat for a functional thread 16 thus repeats itself in the direction of the weft threads 12 to five warp threads 10. In order to arrive at a flame-retardant or flame-retardant closure part, the closure part according to FIGS. 1 and 2 is constructed as described in more detail below. Thus, the warp threads 10 and the weft threads 12 are formed from PA66 plastic materials, these being monofilament-formed polyamide threads or yarns. The mentioned thread or yarn systems are provided with a flame retardant additive, in particular in the form of a phosphorus compound. The flame-retardant mechanism is particularly effective in the gas phase, and the effect is permanent and washable. The PA66 thread system is an intrinsically flame retardant polyamide fiber that does not contain halogens. The textile properties of the PA fiber are not adversely affected by the flame retardant additive, and the fiber proves to be high strength. In particular, the polyamide 66 fiber meets the requirements of DIN 4102-1, B1).

The pile threads 16, which form the later functional elements as stated, are made of PP plastic materials. The PP fibers are commercially available under the trade name LIFOFLAM 70/101 PP and also the polypropylene fiber proves to be high strength and has a flame retardant in the form of a suitable phosphorus compound.

Instead of the phosphorus compounds mentioned as a flame retardant additive, it is also possible to use so-called triazine compounds and / or thread systems which have graphite components or other carbon components.

In order to give the base fabric 14 a secure hold and in particular to avoid that the pile threads 16 are pulled out of the base fabric 14 under load, it is advantageous to provide the base fabric 14 with a finish 30, in particular the finish 30 in such a way 003085

1 1, that all threads lying in the base fabric system are enclosed by the finish 30.

It has proved to be particularly advantageous to use a finish 30 for the base fabric 14 which has self-adhesive properties.

Experiments with a finish 30 of aqueous dispersion of polyurethane, as available on the market under the trade name TUBICOAT PUS with the use of flame retardants sold under the brands Apyrol PA1 and Apyrol PA2, result in very short burning distances, especially in the FAR vertical burning tests and very short afterburning times compared to similarly trained Velcro systems without such a flame retardant additive. The following formulation has proven particularly suitable for the base fabric binding finish 30:

- Apyrin PA1 7%

- Apyrin PA2 7%

- Tubicoat PUS 40%

- water 46%

- MgCh 0.01%.

If an additional adhesive layer is to be preferably applied to the exposed underside of the finish 30, this is realized on the basis of synthetic rubber or on an acrylate basis. In the latter case, it is also useful to form the acrylate as an aqueous dispersion and this to supply a flame retardant, which is available under the trade name Apyrol PP46 and includes in addition to polyphosphoric ammonium salts. In order to be able to connect the base fabric 14, which has been provided with a finish 30, to third-party components, it may also be provided that on the underside of the finish 30, which fulfills the above-described function. On ele- ments 18 is turned away, an additional adhesive layer 32 is applied. This adhesive layer 32, applied in the manner of a coating to the finish 30, may for example consist of a flame-retardant pressure-sensitive adhesive or adhesive system. If the adhesive layer 32 is covered by a suitable paper (not shown) towards the outside, the closure part can be directly fixed to the third component after removal of the cover paper via the adhesive layer 32. However, it has proved to be particularly advantageous in terms of flame retardancy to form the finish 30 from a solvent-free, moisture-crosslinking hot-melt adhesive based on reactive polyurethane prepolymers. Such a polyurethane hot melt adhesive is commercially available under the tradename AdtraPU F 9131-UV. In particular, the finish to be applied in the manner of a coating for the base fabric 14 should be applied between 40 and 200 g / m ² , preferably at 120 g / m ² . The particularly preferred finish has the following formula:

10% to 90% polyester polyol,

0 to 50% polyether polyol,

5 to 35% polysiocyanate,

- 2 to 50% of flame retardants such as antimony and halogen-free Phos ^¬ phor- and / or triazine compounds, and

If necessary, additives such as catalysts and stabilizers.

In particular, UV stabilizers are mentioned here and so-called antioxidants, which due to their low concentration can not negatively influence the process parameters during the production of the closure part. EP2014 / 003085

13

It will be surprising to one of ordinary skill in the art of fastener technology that the finish 30, such as a coating which is even subsequently applied to a finished, non-flame resistant hook and loop fastener which may also be cast, not only meets the typical requirements of the art In addition, the recently demanded so-called composite test is passed. If, for example, the hook-and-loop fastener is sewn on with its one closure part in the form of a textile fabric which serves, for example, as a curtain / seat cover, the individual proof for the adhesive closure part is no longer sufficient, but rather the low flammability in the named composite as a whole must be checked. Due to the presented finish 30, such composite tests can be carried out easily and successfully provided that the corresponding closure parts and / or the textile base material of the composite partner are likewise designed to be flame-retardant.

Despite the relatively high concentration of flame retardants, the wash fastness of the overall closure system is maintained even at very high temperatures, for example in the context of 95 ° -Kuchwäschen. Furthermore, it is ensured that the strict requirements for the use of chemicals are met. The finishing system described here fulfills the valid European standards and guidelines. Overall, it should be noted that a closure part equipped or provided with the abovementioned materials more than meets the criteria identified for the individual flammability tests. It has been shown in practical experiments that both the afterburn time and the dripping parts of the closure part under heat and the measured firing range are Significantly reduce compared to known systems, if necessary let go to zero.

Claims

P a n t a n s p r e c h e

Flame-retardant closure part, which is adapted to form a releasable closure to a corresponding closure part, with at least one planar base fabric (14) of warp (10) - and weft threads (12) and with on the front of the base fabric (14) above Functional elements (18), wherein the base fabric (14) is provided with a flame retardant finish (30), characterized in that the base fabric (14) and the functional elements (18) predominantly, but preferably completely, material from flame retardant plastic material consist.

Flame retardant closure member according to claim 1, characterized in that the warp (10) - and / or the weft threads (12) predominantly, but preferably completely, consist of PA66 plastic materials.

Flame-retardant closure part according to claim 1 or 2, characterized in that the functional elements (18) formed from thread material predominantly, but preferably completely, consist of PP plastic materials.

Flame-retardant closure part according to one of the preceding claims, characterized in that the threads (10, 12, 16) consisting of PA66 or PP plastic materials have flameproofing additives such as phosphorus and / or triazine compounds and / or graphite components.

Flame retardant closure part according to one of the preceding claims, characterized in that the thread-like function onselemente (16) are integrated as pile threads in the base fabric (14), the closed-loop form closure elements (22, 24) and the cut and heated at their free ends mushroom-shaped closure elements (28) form.

Flame-retardant closure part according to one of the preceding claims, characterized in that the finish (30) used for the base fabric (14) has self-adhesive properties or with an independent, preferably flame-retardant adhesive layer (32) on its side away from the functional elements (16) is provided.

Flame-retardant closure part according to one of the preceding claims, characterized in that the self-adhesive adhesive layer (32) is realized on the basis of synthetic rubber or on an acrylate basis.

Flame-retardant closure part according to one of the preceding claims, characterized in that the finish (30) is formed from a solvent-free, moisture-crosslinking hotmelt adhesive based on reactive polyurethane prepolymers.

Flame retardant closure member according to claim 8, characterized in that the hot melt adhesive (30) further includes the following components:

10 to 90% polyester polyol,

0 to 50% polyether polyol,

5 to 35% polyisocyanate,

2 to 50% flame retardants, such as antimony and halogen-free phosphorus and / or triazine compounds, and If necessary, additives such as catalysts and stabilizers.

10. Flame retardant closure member according to one of the preceding claims, characterized in that the flame retardant adhesive layer of the finish (30) comprises at least one acrylate compound and polyphosphoric acids and ammonium salts including graphite or other carbon parts.

1 1. Flame retardant finish or coating for a closure part, in particular for a closure part according to one of the preceding paragraphs

Claims 1 to 10, which is adapted to form a releasable closure to a corresponding closure part, with at least one planar-shaped base support (14) and with on the front of the base support (14) above functional elements (16), wherein the base support ( 14) is provided with a flame retardant finish (30), characterized in that the finish (30) is formed from a solvent-free, moisture-crosslinking hot-melt adhesive based on reactive polyurethane prepolymers.

12. Flame retardant finish according to claim 1 1, characterized marked ^¬ characterized in that the hot melt adhesive further includes the following components:

10% to 90% polyester polyol,

0 to 50% polyether polyol,

5 to 35% polyisocyanate,

2 to 50% flame retardants, such as antimony- and halogen-free

Phosphoric and / or triazine compounds, and

If necessary, additives such as catalysts and stabilizers.