EP2322711B1 - Laminar textile fibreglass material - Google Patents

Abstract

The material has a visible side and a rear side, where the visible side forms a front side. The visible- and rear sides have coatings (5) made of polyurethane. The coating in the visible side has smaller dry mass than the coating of the rear side based on dry mass of the polyurethane in gram per square meter. The material contains R-glass, M-glass, corrosion resistive E-glass (ECR-Glass), D-glass, alkaline resistant (AR)-glass, E-glass, C-glass and fibers e.g. polyester-, Kevlar(RTM: Para-aramid synthetic fiber)- and carbon fibers. An independent claim is also included for a method for producing a flat, textile glass fiber material.

Description

The invention relates to a flat, textile fiberglass material, which is characterized in that the front side forming the visible side and the back are provided with a specific coating of polyurethane.

Flat, textile fiberglass material that can be used as a wall or ceiling covering is known in the art. Due to the excellent range of properties find such flat textile fiberglass materials as semi-finished textile and textile finished products extensive application. For example, materials made of glass fibers are waterproof, hygienic, easy to clean and are available in many interesting structures to choose from. The excellent properties of the flat, textile glass fiber materials known in the prior art are essentially determined by the glass fiber material itself, whereby a high tensile strength can be achieved and cracks can be bridged. Another advantage of the glass fiber materials is the fact that they are fire resistant and ensure easy and uncomplicated handling. Textile glass fiber materials also show good abrasion resistance and can be produced by a surface coating in the form of brushing, for example by means of emulsion paint, in a variety of optical design. Therefore, flat, textile glass fiber materials in the form of wallpaper, especially for highly stressed areas, such as entrance areas, staircases, corridors, sanitary areas, hospitals, medical practices, department stores, lounges, etc., are particularly suitable.

It is already known in the art to allow easy handling of such glass fiber materials, i. use them as a wall covering to impregnate the fiberglass material, e.g. based on a formulation of starch, thickener and binder can be done. With the help of this impregnation, it is also possible to achieve an activation by subsequent moistening, and then to glue the glass fiber wallpaper to the wall.

For example, the GB-A-1 184 563 a pre-glued nonwoven wallcovering made of glass fibers with two different coatings on both surfaces and a starch adhesive.

Furthermore, from the DE 10 2007 009 619 A1 a textile fiberglass material is known in which an antimicrobial coating has additionally been applied.

Furthermore, it is also known for areas that are highly stressed, so-called. Vinyl wallpaper use.

Coated glass fiber materials are furthermore known from GB 2054407A, WO 00/41584 and FR 2287337.

However, it has been found that the textile glass fiber materials hitherto known in the prior art, when subjected to high mechanical stresses, do not yet have satisfactory properties. For example, e.g. in high traffic areas, e.g. In hospitals, by constant contact of the beds with the wall covering made of textile fiberglass material to observe damage to the Glasfasermateriälien. The same occurs even when e.g. Fiberglass wallpaper used in airports and thereby by continuous passing of suitcases on walls a high mechanical stress of the glass fiber wallpaper occurs, so that here then damage to the tissue surface occurs. Similar damage also occurs in other applications where glass fiber wallpapers are used in high stress areas, e.g. in restaurants or in commercial kitchens.

A disadvantage of vinyl wallpapers is that they are only half as strong in tensile strength as fiberglass wallpapers and that outgassing of additives and plasticizers must be expected.

Proceeding from this, it is therefore the object of the present invention to propose a flat, textile fiberglass material that withstands high mechanical endurance stress without substantial damage to the textile fiberglass material. A further object of the present invention is to provide a corresponding production method for such a textile highly stressable flat fiberglass material.

The invention is achieved with respect to the glass fiber wallpaper by the features of claim 1 and in relation to the manufacturing method by the features of claim 13. The dependent claims show advantageous developments.

According to the invention, it is thus proposed that the visible side forming a front side and the back side of a flat, textile glass fiber material have a coating which contains and / or consists of polyurethane (PU).

It has now been shown in experiments that in a flat, textile glass fiber fabric, when both the front side forming the visible side and the back are coated with polyurethane, a high mechanical stability is achieved even under continuous load. It is surprising that in addition to the high mechanical durability, the textile fiberglass material with the inventive equipment continue to roll easily and can also be glued to commercial tissue adhesives. The textile fiberglass material according to the invention can of course also be painted with emulsion paint. The color gradient and the color adhesion are in no way impaired by the PU coating. In this context, it should further be emphasized that the flat, textile glass fiber material according to the invention is also permeable to water vapor, i. is breathable, and also the equipment with the PU coating is plasticizer and halogen-free. Also the fire class B1 s1 d0 is fulfilled.

At this point it should be further emphasized that it was not foreseeable even for a specialist that by the application of emulsion paint, as it has been known in the prior art also in glass fiber materials, in the inventive equipment of the textile fiberglass material, a further increase in the mechanical strength is achievable.

The excellent mechanical resistance and the other positive properties described above are obviously achieved in that the visible and backside coating completely envelop the fiberglass material, so that a permanent stabilization occurs. It has also been shown that the open spaces between the crossing points of the warp and weft threads are also at least partially filled with PU in the flat textile fiberglass material according to the invention, so that ultimately an almost complete covering of the glass fiber materials occurs.

Particularly preferred in the invention is the embodiment in which the dry mass of PU in g / m ² on the visible side coating has a smaller dry mass than the backside coating. Favorable values for the dry mass for the visible side coating are between 10 to 40 g / m ² and for the backside coating, again based on the dry mass, of 20 to 50 g / m ² , wherein, as already stated above, it is essential that the dry matter in the visible side coating is smaller than in the backside coating.

According to the invention, it is proposed that the coating on the visible and rear side is a coating which contains PU / starch and / or consists thereof.

The adjustment of the above-described different dry matter on the visible and the reverse can now be achieved by providing a different application rate, e.g. is applied by the application thickness, or that on the visible and rear side a coating is applied, which consists of a PU / starch formulation and in each case for adjusting the different PU content on the visible and rear side a different ratio of PU to starch is complied with.

As the Applicant has been able to show, it is preferred that a PU / starch coating is applied to the visible and rear side, wherein then, based on the dry mass on the visible side, a ratio of starch to PU of 0.5- 1.5: 1.8-5, preferably 1: 3.5 and on the back a ratio of 0.5-1.5: 3-7, preferably 1: 5.5, in each case based on the dry mass, is maintained ,

Regarding the embodiment of the invention wherein a starch / PU coating is applied on the visible and the reverse side, this is achieved by using a selected starch / PU formulation. For visible side coating, a recipe consisting of a starch solution, i. from an aqueous starch solution, as well as from a PU solution / emulsion, wherein additionally thickener and crosslinker for polyurethane can be added.

For the backside coating, a similar formulation can be used, in which case the ratio of starch solution to PU solution must be varied accordingly.

Essential in the invention, however, is always that ultimately results on the viewing and on the back of a PU coating with the specified characteristics.

The type of the flat, textile glass fiber material according to the invention comprises all materials known in the prior art and is not subject to any restrictions here. According to the invention, the flat, textile glass fiber material comprises glass fiber fabric, glass fiber nonwoven fabric, glass fiber knitted fabric and glass fiber knit fabric.

Preferably, the flat textile fiberglass material of the present invention is a woven product, i. a glass fiber fabric. Such a glass fiber fabric can be made on a variety of devices as known in the art. For example, gripper looms or air-jet looms can be mentioned here.

The textile fiberglass material is preferably R glass, M glass, ECR glass, D glass, AR glass, but preferably E and C glass. In the flat textile fiberglass material according to the invention, it is also possible for other fibers, such as polyester, Kevlar or carbon fibers, to be present in addition to the glass fibers. The selection of the corresponding additional fibers depends on the application.

In the case of glass fiber fabrics, the textile glass fiber fabric in the weft and in the warp is formed from glass filament materials in the form of glass silk, glass staple fibers, textured glass silk and / or glass wands.

The invention further relates to a method for producing a flat, textile fiberglass material as described above. According to the invention, the procedure is such that the visible side coating is applied, then dried, and after drying the visible side coating, a backside coating is applied. The production method according to the invention thus takes place in a stepped process.

It is preferred in this case if different application methods are used for the visible side and the rear side coating. In tests, it has been found that a rotary screen printing method is best suited for the visible side coating and a roller coating method is most suitable for the backside coating. It is essential that by the coating process on the back by the roll process by the application process, the coating material, i. the polyurethane or the polyurethane / starch formulation through which roller system can penetrate into the open spaces between the intersections of the warp and weft threads.

With regard to the drying process, a multi-stage drying process can best be used here. Also, as already known in the prior art, there is still the possibility that an additional adhesive layer must be applied on the back, so that the textile fiberglass material according to the invention can then be applied to a substrate, for example a wall, after moistening.

• Figur 1 zeigt schematisch den Prozessablauf beim Rotationssiebdruckverfahren für die Sichtseite.
• Figur 2 zeigt schematisch das Auftragsverfahren für die Rückseitenbeschichtung mittels eines Walzensystems, und
• Figur 3 zeigt eine Zusammenstellung der mechanischen Festigkeitsprüfung.

The invention will be explained in more detail with reference to an example and three figures.

• FIG. 1 schematically shows the process flow in the rotary screen printing process for the visible side.
• FIG. 2 schematically shows the application method for the backside coating by means of a roller system, and
• FIG. 3 shows a compilation of the mechanical strength test.

For the investigations, a standard glass fiber fabric was used. Such a standard glass fiber fabric consists of warp and weft with variable fineness, which can be composed of different types of glass and different glass yarns, as well as a base coat. As glass types, in particular C and E glass can be mentioned in addition to all currently known types of glass. As glass yarns are glass staple fibers, textured glass silk, glass rovings and glass silk in question. The fabric may be treated with different weaving techniques, e.g. Jacquard weaving technique, and with different types of weave, e.g. Canvas or twill weave. Through the weaving techniques, the use of different yarn counts and the different types of weave different patterns can be created.

The primer coating is like in the DE 10 2007 009 619 A1 described together. The uncoated glass fabric has basis weights between 50 and 400 g / m ² . The application amount of the base coat can vary within wide ranges depending on the basis weight of the uncoated glass fabric. However, is generally 10 to 200 g / m ² , based on the dry mass. The end product weights resulting from uncoated glass fabric and base coating are between 100 and 500 g / m ² .

According to the embodiment according to FIG. 1 For example, a visible side coating is performed using a rotary screen printing method. For the coating, a perforated metal cylinder 1 with holes of a certain number and size can be used, this metal cylinder 1 having a doctor blade 2 and a doctor blade holder 3. The glass fabric 4 to be coated is now, as can be seen in FIG. 1, guided vertically past the metal cylinder 1. The perforated metal cylinder 1 with holes of a certain number and size and the doctor blade 2 or the doctor blade holder 3, which is also referred to as a template, is filled with the coating material 6. The coating material 6 is designed in its physical properties, in particular in its viscosity, so that it can be pressed through the holes of the perforated metal cylinder 1. The coating applied by the method described above is designated 5. The metal cylinder 1 rotates in the same direction as the tissue is guided.

In the embodiment, as in the FIG. 1 As a coating formulation, a formulation has been used which consists of a starch solution, water, thickener, starch crosslinking agent, polyurethane and, if necessary, crosslinking agent for polyurethane. The coating material to be applied is adjusted in its viscosity so that a problem-free application to the glass fabric. 4 is guaranteed.

The formulation for the visible side coating is adjusted so that ultimately a dry matter, determined in g / m ² of starch to PU, from 0.5 to 1.5: 1.8 to 5 results. In the face side coating as described above, a dry matter to starch ratio of 1: 3.4 resulted.

After application of the coating material is then carried out a drying, which is preferably carried out in the form of a stepped drying. For drying, the fabric 4 is guided with the coating 5 via a roller system, wherein different temperatures are maintained here.

In the second process step, as in FIG. 2 represented by means of a roller application system on the back also applied a PU / starch coating. In this application method, a defined original of the coating material 7 is applied to a roller 8. The coating material 7 is then applied by the roller 8 to the fabric 4, ie in this case to the back. In FIG. 2 is the already coated visible side not shown.

Essential in the application process for the backside coating is that this is done by means of a roller system, as this ensures that the back and also the open spaces between the crossing points of the warp and weft threads are filled with the coating material. Suitable formulations for the backside coating must be selected so that, based on the dry mass in g / m ² , a ratio of starch to PU of 0.5 to 1.5: 3 to 7 can be maintained. In the embodiment as described above, a formulation has been chosen which has resulted in a coating having a ratio of 1: 5.5 for starch to PU.

In FIG. 3 now the measurement results are compiled, which have been achieved by means of a textile fiberglass material according to the invention, wherein the glass fiber material as described above in the FIGS. 1 and 2 described, was constructed.

To carry out the experiments while a separate experimental arrangement was used. The experimental setup was as follows. On a vertical wall were the samples to be examined, i. the fiberglass fabric, arranged. About this glass fiber fabric, a plastic wheel, as it is commonly used in hospital beds, stripped horizontally. The plastic wheel, which was attached to a movable test arm, was unrolled over the surface of the glass fiber fabric to be examined using a contact pressure, measured with a spring balance of about 11 kg. It was carried out 35 cycles per minute. It has been shown that during the tests, a surface temperature of about 35 ° C is formed.

The corresponding measurement results are in FIG. 3 compiled. In the left-hand column, the cycles are indicated and the measurement results are arranged in the following columns, whereby an optical evaluation has taken place here. The first two columns show the measurement results of a glass fiber fabric with a coating, as it was previously known in the art, ie with a coating of a starch formulation. Column 1 shows the test results, in which no further coating was applied to the glass fiber fabric except for the starch coating. The second column gives the measurement results for a standard glass fabric in which the starch coating was still provided with a coating of an emulsion paint. As can be seen from the measurement results, there is no difference in the glass fiber fabrics according to column 1 and 2. As a result, this means that the damage occurs after 1000 cycles, regardless of whether the standard glass fabric was still coated with a disperse paint or not.

In column 3, the measurement results for a glass fiber fabric according to the invention are shown. The glass fiber fabric was constructed as described above and has a coating on the visible side, which has, based on the dry mass in g / m ² , a ratio of starch to PU of 1: 3.4, and for the back of a ratio of starch to PU, again measured in g / m ² , of 1: 5.5.

In the case of the measurement results shown in column 3, a glass fabric was also used in which no top coat was made with an emulsion paint. As can be seen from the measurement results, this glass fiber fabric easily withstands 4000 measuring cycles compared to 1000 measuring cycles for the glass fiber fabric of the prior art.

As is apparent from column 4, it is also completely surprising for a person skilled in the art that when the glass fiber fabric according to the invention is still coated with an emulsion paint, an above-average increase in mechanical resistance is associated. As already shown in the prior art fiberglass fabrics, when a dispersion paint of standard fabric is applied, there are no improvements in mechanical resistance. In the case of the equipment according to the invention of the glass fiber fabric, however, a mechanical stability which is several times greater occurs.

Claims (15)

1. Glass fibre wall covering in the form of a sheetlike, textile glass fibre material having a visible side at the front and having a reverse side, characterized in that the visible side and the reverse side has a coating, wherein the coating on the visible and reverse side is a coating which contains and/or consists of PU/starch.
2. Glass fibre wall covering according to Claim 1, characterized in that, based on the dry mass of PU in g/m², the visible side coating has a smaller dry mass than the reverse side coating.
3. Glass fibre wall covering according to Claim 2, characterized in that, based on the dry mass of PU, the visible side coating is 10 to 40 g/m² and the reverse side coating is 20 to 50 g/m² with the proviso that the dry mass in the visible side coating is smaller than in the reverse side coating.
4. Glass fibre wall covering according to Claim 2 or 3, characterized in that the differing dry mass on the visible and reverse sides is established by setting the ratio of PU to starch.
5. Glass fibre wall covering according to Claim 4, characterized in that the starch:PU ratio set is 0.5-1.5:1.8-5 and preferably 1:3.5 on the visible side and 0.5-1.5:3-7 and preferably 1:5.5 on the reverse side, all based on the dry mass.
6. Glass fibre wall covering according to Claim 2 or 3, characterized in that the differing dry mass on the visible and reverse sides is established by application of different add-ons.
7. Glass fibre wall covering according to one or more of Claims 1 to 6, characterized in that the glass fibre material is selected from the group consisting of glass fibre wovens, glass fibre nonwovens and glass fibre knits.
8. Glass fibre wall covering according to Claim 7, characterized in that it comprises a textile glass fibre material constructed of R-glass, M-glass, ECR-glass, D-glass, AR-glass, but preferably of E- and C-glass.
9. Glass fibre wall covering according to Claim 7 or 8, characterized in that in addition to the glass fibres it also contains still other fibres, such as polyester, Kevlar or carbon fibres.
10. Glass fibre wall covering according to one or more of Claims 7 to 9, characterized in that in the case of glass fibre wovens the textile glass fibre weave contains glass filament materials in the form of glass silk, glass staple fibres, textured glass silk and/or glass rovings in warp and weft.
11. Glass fibre wall covering according to one or more of Claims 1 to 10, characterized in that the reverse side coating is provided with a final coating of adhesive.
12. Process for producing a glass fibre wall covering according to one or more of Claims 1 to 11, characterized in that in a first step the visible side coating is applied, then dried and after the visible side coating has dried a reverse side coating is applied.
13. Process according to Claim 12, characterized in that the visible side coating is applied via a rotary screen printing process and the reverse side coating via a roll application process.
14. Process according to Claim 12 or 13, characterized in that a staged drying process is used both for the visible side coating and for the reverse side coating.
15. Process according to any one of Claims 12 to 14, characterized in that at least one layer of adhesive is applied after the reverse side coating has dried.

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