DE3045444C2 - Resilient floor covering based on plastic for sports facilities, in particular tennis courts - Google Patents

Description

description

The present invention relates to an elastic floor covering according to the preamble of the patent claim 1.

Especially in sport, the leg muscles, ankles and the associated tendons become special stressed if z. B. is suddenly braked from fast running, or sudden rotary movements. These loads occur particularly frequently in ball games and here again in particular in tennis on.

Tennis players in particular are used to the fact that the clay courts that are usually present in Europe and that are called Surface is only held together mainly by the capillary forces of soil moisture Have a layer of brick dust, or grass areas when stopping from the run or when turning the movements slow down gently, as the kinetic energy slows down due to the friction between the shoe and the ground is dismantled.

For some years more and more sports facilities have been created in halls, so that such ball games now can often be operated all year round, and also so-called hard courts, which do not have any comparative require extensive maintenance such as sand or grass pitches.

However, these new facilities require a serious change from the athlete. The sport commonly used therein (halls) floors made of asphalt, concrete, rubber granules, Holt or carpet or "artificial turf", the above-mentioned property often missing entirely, as a result of excessive friction between sports shoes and covering a sliding effect is almost completely suppressed.

This places greater strain on the athlete's musculoskeletal system, and in many cases it is even overused. or the athlete is forced to completely change his running style, e.g. B. to slow down with tripping steps. Nevertheless, there is still a risk of overexertion, especially if the athlete is physically fit subsides, and in addition, these coverings often lack elasticity.

This problem was recognized early on, and there has been no lack of attempts to address these disadvantages to fix.

So shoes with special soles are developed

imitating the braking effect of the clay court should. Experience has shown, however, that only a minority of these additional sportswear supplies itself which is also subject to increased wear

Therefore, it has also been proposed instead to modify the gym floors, e.g. B. to apply a layer of brick dust to them. However, this measure has serious disadvantages. Such a sand layer must always be kept sufficiently, but not excessively, moist, as otherwise the layer will either be too smooth or greasy due to insufficient bonding of the surface. The desired floor moisture is practically impossible to maintain, especially in halls, and the indoor climate is negatively influenced by the damp covering. Such floors are also unsuitable for all-weather systems because of the even more time-consuming maintenance
From DE-AS 26 58 730 it is known to apply a thin layer of a polyurethane binder to a conventional sports hall flooring, into which small solids such. B. glass beads are rolled in so that they protrude about halfway and do not overlap each other, so as it were in a "monoparticulate" layer.

It is essential with this known covering that the glass beads on the top of the top layer are flawless are anchored so that their surface is covered evenly and safely by the glass beads

From DE-OS 20 56 886 a generic floor covering is known which contains grit made of emery-like substance fixed in and on the top layer. This covering therefore has increased slip resistance.
The invention is therefore based on the object of making available a new type of sports surface that ensures playing conditions that largely correspond to those of brick-dust courts. In particular, the elastic sports surface should allow the desired force reduction during play and at the same time allow the necessary sliding and rotating movements of the feet.

According to the invention, this object is achieved by the characterizing features of claim 1.
The term PVC here includes homopolymers, copolymers and also graft polymers of vinyl chloride (VC).

The PVC used can of course also consist of various polymers of the above-mentioned Kind be composed, which is in the composition of the monomer units and / or in their physical Parameters, such as the K-value, differ and / or have been produced according to different processes are. So the PVC z. B. by the suspension, but especially by the emulsion or microsuspension process be made. In principle, however, it is also possible to use PVC that has been polymerized in the mass to use.

Examples are the pasteable Vinnol® E and P types and mixtures of these polymers with the Paste blending resins Vinnol® C 65 V or C 66 H called by the anmeiderin

In the copolymers and graft polymers, amounts of up to about 25% by weight, based on the total weight of the polymers, on other monoolefinically unsaturated monomer units which can be copolymerized with VC be included.

The only possible plasticizers here are the esters of longer-chain or aromatic dicarboxylic acids or

of phosphoric acid with longer-chain alcohols and phenols are called lower-chain "here generally understood compounds having 6 to 18 carbon atoms, e.g. B. adipic, sebacic, azelaic acid and hexanol, octanol, decanol, undecanol eto, under aromatic z. B. phthalic acid. If the covering is to be used outdoors, other, particularly saponification-stable plasticizers, such as. B. alkyl sulfonic acid esters of phenol, e.g. B. Mesamoll® (Bayer AG), or polymer plasticizers such as Palamoll® 632 or 645 (BASF), Uraplast® W2 or F54 (Scado GmbH) can be used. The amounts of plasticizer, which of course also includes mixtures of various such compounds according to the desired surface properties and to a certain extent according to the plasticiser.den properties of the plasticizer itself The surface hardness can be determined by the amount and type of plasticizer and thus the jumping behavior of the ball can be controlled in a wide range.

In the following, the amounts by weight of the additives are in each case to 100 parts by weight. Resin related.

Pigments (preferably 0.5-50 parts by weight) and in particular, if the floor covering is to be used outdoors, also use light protection substances (preferably 0.05-2 Parts by weight) added

Because of the better handling during production and installation, as well as the increase in strength and dimensional stability that can be achieved with it, the top layer is applied to a flat carrier material during the production of the floor covering. Woven or fleeces can preferably be used as such carrier materials. Those made of glass fibers, polyester or mixtures thereof are particularly suitable. Particularly preferred are glass fiber nonwovens with a weight per unit area of 30 to 90 g / m ² and polyester mats with a weight per unit area of 150 to 300 g / m ² , many of which are already on the market precoated.

The elastic floor covering according to the invention is preferably produced from paste processing known coating systems. The base and / or intermediate layers can, however, also be calendered be applied to the carrier material. Several layers of the same mass can be used are applied one after the other, so that, for example, the thickness of the top layer can be easily adjusted can. For example, the inherently homogeneous wear layer can be applied up to 10 mm thick, in general, 3 to 5 mm will be sufficient even for heavy loads. By applying This wear layer can also be reinforced by the intermediate layers described above.

In general, the flat carrier material on this coating installation is first provided with the top layer, or in a preferred embodiment initially with one or more. Intermediate layers. Before each of the next line of the same paste (to increase the layer thickness, for. Example, the wear layer) or another for a further layer is applied, the coated material is preferably pre-cured at about 140 to 160 ⁰ C. After application of the top layer and the gelation of the on top of practically finished covering is provided on the back again optionally having one or more intermediate layers and then to the "foam coat", and preferably fully gelled at about 18O ⁰ C.

Under this foam line, the spreading of either the mass to be foamed or the understood already foamed mass.

It goes without saying that this production into webs or plates is intermittent, partially continuous or can be done continuously.

The topping produced in this way is cooled and with the help rotating brushes roughened the surface so that part of the filling material comes to light. This can of course also only after laying z. B. be done with grinding machines, as they are when laying parquet floors are common.

The following examples are intended to further illustrate the invention. The recipe ingredients are each given in TL by weight.

example 1

On a z. B. for the production of floor coverings used 3-head coating system, a 2 m wide support material made of glass fiber fleece with a basis weight of 50 g / m ^{2 is provided} with a base coat. The recipe A for this is composed as follows:

A. 100 parts pasteable PVC homopolymer, K value approx. 68

80 parts of dioctyl phthalate

200 parts quartz sand (grain size: approx. 80% by weight: 0.1 rom)

1 part of commercially available Ba / Cd / Zn stabilizer

4 parts of green pigment paste
12 parts of white pigment paste

The recipe components are homogenized in a high-speed mixer of the dissolver type for 20 minutes, and the paste is then sieved off while applying a vacuum.

The paste obtained in this way is used in an amount of approx.

1000 g / m ^{2 are} knife-coated onto the glass fiber fleece at a coating speed of 7 m / min. The temperature in the subsequent 12 m long Gelieckanal is 16O ⁰ C.

The next step is the application of an intermediate layer (formulation B) of the same composition as the top line that follows later.

B. 100 parts pasteable PVC homopolymer, K value approx. 68

100 parts of phenol alkyl sulfonic acid esters (Mesamoll®, Bayer AG, Leverkusen, DE)

300 parts quartz sand (grain size: 80%: 0.1 mm)
2 parts of commercially available Ba / Cd / Zn stabilizer
6 parts of green pigment paste
12 parts of white pigment paste

The PVC paste is produced as described in recipe A. The amount of paste in this layer is 1000 g / m ² ; the intermediate layer is pre-gelled under the same conditions as the base coat.

In the next production step, the top coat (formulation B) is applied with a doctor blade in an amount of 2000 g / m ² . The temperature in the subsequent 24 m long gelling tunnel is 230 ⁰ C.
The glass fiber fleece is then provided on the back with a further base ^{coat according to recipe A in an amount of 400 g / m 2} (gelling temperature 160 ° C., coating speed also 7 m / min) on the coating system.

5.

Finally, a layer of remaining foam is applied to this base coat with the aid of a coating device. The recipe C used for this was brought broken down as follows:

C. 100 teaspoons by weight of a mixture of pasteable PVC homopolymer, K value approx. 80, and PVC blending resin 25 parts of benzyl butyl phthalate, 45 parts of dioctyl phthalate 4 parts silicone foam stabilizer

1 part Ba / Cd / Zn stabilizer 4 parts of white pigment paste

25 parts of chalk

The PVC paste homogenized in the high-speed mixer is fed to a commercially available foam mixer and then knife-coated with a wet density of 0.5 g / ml. The layer thickness here is 2 mm (application speed 7 m / min), gelation takes place at 180 ° C. (channel length 24 m). After passing through the gelling channel cooled and the surface roughened with the help of rotating wire brushes

Example 2

25th

Example 1 is repeated with the following changes: In formulation A, 100 parts of paste-like PVC homopolymer with a K value of about 80 and Chalk instead of the sand and in recipe C 100 parts of a mixture of pasteable PVC homopolymer with a K value of about 68 and PVC blending resin is used, and is applied to the base coat the wear layer is applied without an intermediate layer

35 Example 3

Example 1 is repeated with the following changes:

The plasticizer content of the intermediate layer is increased to 130 parts, the foam layer on the back is omitted.

The sports surface obtained in this way is particularly suitable for sports halls with sprung floors or the like.

Example 4

In contrast to Example 1, the glass fleece is coated with the aid of a fuser roll calender The following recipe is used for this:

50

100 parts suspension PVC for soft processing 70 parts dioctyl phthalate 50 parts of chalk

2 parts Ba / Cd stabilizer

0.2 parts of stearic acid

0.5 part of fatty acid ester of stearic acid, 2 parts of green pigment 4 parts white pigment

The dry blend prepared in the hot mixer is fed at approx. 105 ° C to a planetary roller extruder, which has a temperature of 180 ° C - 150 ° C. The melting roll calender is fed with the plastic mass that occurs. The two rollers are heated to 180-185 ° C. The take-off speed is 8 m / min. The glass fleece coated in this way has a coating of approx. 800 g / m ² .

Then proceed as in Example 1 and the

Claims (1)

Claims 1- Elastic, plastic-based flooring for sports facilities, especially tennis courts, consisting of a top layer made from a PVC paste and an associated carrier material, the top layer containing finely divided filler, characterized in that the top layer is used as a wear layer from a gelled plastisol of 100 parts by weight of a pasteable vinyl chloride polymer with a K value of 55-90.50-130 parts by weight of plasticizer, 0.5 to 10 parts by weight of heat stabilizer, 100-400 parts by weight of sand, glass beads or mixtures thereof as a finely divided filler that increases the sliding effect , which has a grain diameter of 0.05 to 0.5 mm, and that the surface of the floor covering is roughened so that part of the filling material comes to light
2. Resilient floor covering according to claim 1, characterized in that quartz sand is contained as filler in the wearing layer