SK8496A3 - Multi-layer plastic webs or plates with a transparent coating - Google Patents

Abstract

The description relates to multi-layer plastic webs or plates consisting of a coating layer, especially a transparent one, and at least one further layer, at least one layer having at least one ethylene-alkyl acrylate copolymer. The description also relates to a process for producing the plastic webs or plates. The plastic webs or plates can be used as artificial veneers, decorative films, wall, ceiling or floor coverings.

Description

Multilayer plastic strips or boards with transparent coating

Technical field

The present invention relates to multilayer strips or sheets (hereinafter referred to shortly as plastic strips) with a transparent covering layer and to a method for their manufacture and use.

For the purposes of the present invention, multilayer plastics strips or sheets are understood to mean planar formations of several layers arranged one above the other.

Multilayer plastic belts based on vinyl chloride (PVC), with a transparent covering layer as a utility layer, have been used for decades as floor coverings. Such multilayer plastic belts have, for example, the following structure:

- transparent cover layer (clear layer) / (thickness 0,2 to 0,8 mm)

- intermediate layer, optionally dyed and / or patterned (thickness 0,2 to 0,4 mm)

- bottom layer of any color (thickness 1,0 to 2,5 mm)

- optionally a sound-insulating layer, for example of foamed plastic, cork or cork (thickness 1.5 to 2.0 mm)

For patterning, either the opaque layer / clear layer / background may be optionally embossed in one or more colors. This can be advantageously achieved by gravure printing.

In addition to these multilayer / heterogeneous / plastic bands, so-called homogeneous plastic bands are also known, i. made of one plastic layer

-2bands in which all components are mixed so that they exhibit invariable (homogeneous) properties throughout the plastic cross-section, from the top to the bottom.

In the case of homogeneous plastic bands, patterning is achieved by the use of multicolored granules. Typically, polymeric binders, pigments, fillers, and optional granulate-containing excipients are processed into plastic belts or sheets in compaction machines such as calenders, double belt presses or static presses. However, more or less longitudinally directed color sampling is conditional on production in the case of homogeneous plastic bands, whereby the choice of the sample is severely limited. In addition, it is very cost-intensive to rearrange an existing production facility to produce homogeneous plastic belts with altered patterns, as far as possible in the production of homogeneous plastic belts. However, such pattern and color changes are necessary, to respond to changing market demands.

If we compare plastic homogeneous strips with continuous longitudinally directed patterning with multilayer / heterogeneous / plastic strips with a transparent covering layer, these have the advantage that they are completely free in their choice of color and pattern, since the sample can be formed by a variety of transparent underlay patterns and / or suppressing the highest interlayer.

Another advantage of the plastic multilayer strips over the homogeneous plastic strips is that only the cover layer and the uppermost intermediate layer need to be color-fast in order to obtain plastic strips with fixed colors. All of the underlying layers may be of any or varying color, allowing the incorporation of wastes from the production of plastic strips or recycled material into these lower layers.

As stated at the outset, PVC-based floor coverings with a transparent covering layer as a utility layer,

-3 long traded. In recent years, however, the disposal of PVC or PVC-containing plastic materials has become increasingly problematic, as the chlorine content of PVC is a potential storage hazard and the burning of PVC releases hydrogen chloride, which corrodes the combustion plant and harms health.

In addition, PVC-based floor coverings always contain a plasticizer. The plasticizer content creates further disadvantages since the plasticizer can migrate into the adhesive by which the floor covering is glued, thereby reducing the adhesive strength. The plasticizer can also sweat, making the floor covering a dust collector that is difficult to clean. The emollient also forms a sewer system for dye migration, thereby producing discoloration which can no longer be removed. In addition, liquid emollients are another environmental problem.

BACKGROUND OF THE INVENTION

For these reasons, ecological plastics have been sought as a substitute for PVC, from which products such as multilayer floor coverings can be produced, with similar good properties to PVC products, without showing their disadvantages. olefin polymers such as polyethylene (PE), polypropylene (PP), ethylene-propylene copolymers, such as copolymers of ethylene with other olefinic unsaturated compounds.

Thus, for the production of belts as in EP-B1-0 321 760, it is proposed to use a homogeneous, PVC-free plastic polymeric binder ethylene-vinyl acetate (EVAS) copolymer.

DE-A1-41 14 085 also proposes a PVC-free floor covering in which homogeneous plastic strips are produced,

Which contains EVA together with a polyolefin as a binder. These belts will triple.

Furthermore, DE-C1-41 27 107 does not include PVC flooring,

EVA with a transparent film of low density and / or triples.

Although the EVA copolymers are so variable in use that they can be used practically in the copolymer, they can preferably duplicate or design wherein the ethylene copolymer-based covering doubles the multilayered linear flooring very advantageously and are all layers of the multilayer plastic web. Thereby, a structure with as homogeneous composition of the polymers can be formed. This is important due to the recycling of internal production wastes, edge strips, individual layer collection wastes a.t.ď.

On the other hand, however, EVA copolymers have considerable disadvantages. According to the deed of concentration at the workplace: New Chemicals Act Handbuch der gefährlichen Stoffe, Eberhard Quellmalz, Weka-Verlag, February 1992 (Dangerous Substance Manual, Eberhard Quellmalz, Weka Publishing House, February 1992), vinylacetate belongs to the group IIIb causing cancer. This can give rise to considerable problems and risks in the manufacture of EVA-containing plastic belts and sheets and their use as floor coverings, in particular due to the ever-increasing safety regulations.

The residual vinyl acetate monomer content of the traded EVA polymers is in the range of 0.1 to 0.5 weight percent. This proportion of vinyl acetate can be further reduced by subsequent treatment, for example by the Stripp method. This can result in considerable loads in poorly ventilated areas, since vinyl acetate is slowly and continuously excreted from the floor covering containing the traded EVA polymers.

-5EVA has relatively low thermal stability, which means that it tends to cleave acetic acid at higher temperatures. A detectable cleavage of acetic acid already occurs at a temperature above 180 ° C in EVA. This creates problems when other polymers are to be added, such as the non-meltable isotactic polypropylenes, in order to improve the mechanical properties (wear resistance, hardness), since acetic acid cleavage already begins at the necessary processing temperatures. This cleavage of acetic acid adversely affects the properties of EVA and hence the properties of the EVA-containing floor coverings, since chains of double-bonded polymers are formed which can oxidize and induce degradation of the polymers.

Low-density ethylene copolymers (density range 0.915 - 0.935 g / cm ³ ), such as ethylene-butene or octene copolymers (1), are particularly suitable as an alternative to EVA copolymers. These low density ethylene copolymers, like the EVA copolymers, allow extremely high loading with conventional fillers in conjunction with controllable flexibility and hardness. However, such low density ethylene copolymers exhibit distinct olefinic properties, for example, are highly apolar. These olefinic properties have a negative effect, inter alia, on the bondability of multilayer plastic strips containing such ethylene copolymers. In addition, it is problematic to provide such plastic strips, as is customary with floor coverings, with a finish or varnish in order to improve their wear and dirt resistance properties since the adhesion between the plastic strip and the finish or varnish is insufficient.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention to prepare

- 6-layer plastic strips or sheets, in particular those with a transparent covering, not containing PVC, EVA and plasticizer. However, these plastic strips have the advantageous properties of known multilayer plastic strips or sheets, without having the disadvantages mentioned above.

A further object is to describe a method for producing these multilayer plastic strips or sheets.

These objects are solved by plastic strips or sheets and methods of their production as defined in the claims.

The plastic strips or sheets are formed with a cover layer and at least one additional layer, one of the layers comprising at least one ethylene-alkyl acrylate copolymer. Preferably, the cover layer is transparent and contains an ethylene-alkyl-acrylate copolymer fraction.

Surprisingly, it has been found that the plastic strips or sheets according to the invention, which do not contain PVC or EVA and a plasticizer, still have excellent flexibility and wear resistance. Furthermore, they have the advantage that higher temperatures, for example above 180 ° C, can be used in their processing without compromising the properties of the polymer. This is advantageous because, in order to optimize the mechanical properties of the plastic strips, such as wear resistance, hardly fusible polymers, such as isotactic polypropylene types, can be assigned, without acetic acid cleavage, as in the case of using EVA copolymers. A further advantage of the multilayer plastic strips according to the invention is their comparatively imperceptible wettability, which advantageously affects the dimensional stability and hence the utility properties, because the higher wettability causes swelling of the plastic strips, which can cause bubbles and cracks in the glued joints. These reduce adhesion and create dirt surfaces.

Finally, it has surprisingly been found that the multilayer plastic strips according to the invention, when used as floor coverings, can be treated excellently with the polymer-rich dispersions contained in the floor treatment compositions. This means that the floor treatment means can adhere very well in the layer of the desired thickness to the plastic strips and protect the floor covering for a sufficiently long time. This can probably be deduced from the increased polarity of the surface of the plastic strips or sheets due to the presence of polar groups in the ethylene-alkyl acrylate copolymers used according to the invention.

The plastic strips according to the invention can also be provided with a finish applied to the manufacturer, which also adheres perfectly. Floor coverings made of plastic materials are also often coated with a varnish on the utility side to improve performance. Also for this purpose, the plastic strips according to the invention are well suited because such a lacquer adheres perfectly without the need for pretreatment of the plastic strips. A suitable solvent-free two-component lacquer can be a suitable lacquer for this purpose. Preferably, it is a solvent-free lacquer that can be cured by radiation (e.g., ultraviolet radiation). However, with a lower ethylene-alkyl acrylate copolymer content in the cover layer, it may be advantageous to treat the surface of the plastic web with a corona discharge prior to applying the finish or varnish.

Corona discharge treatment of the back side of the cover layer or the top side of the intermediate layer below the cover layer is also advantageous if these sides are to be printed with a pattern.

The ethylene-alkyl acrylate copolymers used according to the invention can be part of each of the layers of multilayer plastic strips or sheets. In the case of transparent

The overcoat may be in the range of about 5 to 7 weight percent based on the weight of the overcoat, preferably 10 to 50 wt%, and more preferably 20 to 30 wt%. In the other layers, the polymeric binder comprises 20-80 wt%, preferably 40-70 wt%, and more preferably 60-80 wt%.

70% by weight of at least one ethylene-alkyl acrylate copolymer based on the weight of the polymeric binder.

The proportion of alkyl acrylate in the ethylene-alkyl acrylate copolymer is approximately 4 - 30% by weight, preferably 10 - 30% by weight.

- 15 wt%. The alkyl acrylate content depends on the desired layer properties. The higher the content of alkyl acrylate in the ethylene-alkyl acrylate copolymer, the softer and more flexible the copolymer.

The other layers, in addition to the transparent cover layer, of the plastic strips and sheets of the invention comprise 20

60% by weight, preferably 30-50% by weight, more preferably 35-45% by weight of the polymeric binder.

In the plastic strips or sheets of the invention, the alkyl acrylate in the ethylene-alkyl acrylate copolymer is preferably methyl acrylate, ethyl acrylate, butyl acrylate or any mixture of these copolymers. Ethyl acrylate is particularly preferred because it is less odor intensive than, for example, butyl acrylate. The ethylene-alkyl acrylate copolymer is therefore preferably a copolymer obtained by copolymerizing ethylene with one alkyl acrylate selected from methyl acrylate, ethyl acrylate, butyl acrylate or any mixture thereof. These copolymers can be produced in a manner known per se, preferably by high pressure gas phase polymerization.

The ethylene-alkyl acrylate copolymers used according to the invention can be both random copolymers and block / chain / copolymers, with random copolymers being preferred.

As mentioned above, it grants the presence of at least

One ethylene-alkyl acrylate copolymer of the transparent coating layer of the multilayer plastics strip according to the invention has excellent compatibility and adhesion to polymer-rich dispersions, for example, contained in floor care compositions and also finishes and varnishes. Furthermore, abrasion and wear resistance is visibly improved. Also, the presence of one or more ethylene-alkyl acrylate copolymers in the coating does not substantially affect the transparency of the coating, so that the underside of the coating or the upper side of the underlying interlayer can be suppressed without difficulty by any pattern and this pattern is perceived practically undistorted by the viewer. This is a great advantage over a homogeneous plastic strip, a multi-layer plastic strip with a transparent covering layer.

In addition to the ethylene-alkyl acrylate copolymers, other hardness properties can be used to optimize the utility properties of the plastic bands in the cover layer, and isotactic polypropylene polypropylene copolymers can be used. Next, the polymers. add

For the crystalline solution, the types or the polymer or blend of the coating layer may be used to optimize properties such as hardness, compression strength, abrasion resistance, resistance to contamination and the like. modified by adding, for example, ethylene and propylene homo- and copolymers, ethylene and propylene random copolymers, ethylene propylene rubber (EPM), ethylene propylene diene terpolymers (EPDM) and / or styrene butadiene styrene (SBS) block copolymers, as well as copolymers of ethylene and copolymers another alkene of up to ten carbon atoms, such as octene. To increase the toughness, high density and / or ultra high molecular weight polyethylene of high density can preferably be added. (PE-HMW or PE-UHMW).

Optionally, the auxiliary layer can be added as a rule

Means such as antioxidants, antistatic agents, lubricants and processing aids. The use of antioxidants and antistatic agents, in particular in a transparent covering layer, is recommended in order to protect the plastic web from oxidative degradation and to avoid static charges which are unpleasant in the production of plastic webs and adversely affect the tendency to contamination in later use.

Furthermore, pigments and dyes can be added to the topsheet to obtain a base structure or base coloring prior to printing.

The underlaying of the covering layer or the printing of the underlying layer can be carried out in a conventional manner, for example, by semi-embossing gravure engraved cylinders, with the prior treatment of the surface with a corona discharge being preferred.

For layers other than the transparent cover layer of the multilayer plastic strips according to the invention, they come as polymers which can also be used in the cover layer as well as homo- and copolymers of ethylenically unsaturated compounds or any mixtures thereof.

These other layers (interlayer, backsheet) may contain conventional fillers, for example chalk, kaolin, talc, wood flour, quartz flour, dolomite, diatomaceous earth, pest, slate meal or any mixture thereof, the proportion of fillers based on the respective layer being 40%. - 80 wt.%, Preferably 50 - 70 wt.%, And particularly preferably 60 - 65 wt. %.

Auxiliary agents, pigments and dyes may also be added to the other layers as described for the cover layer. Since the color is not critical for the intermediate layer and each optional further layer, recycled material can be added to these layers, especially the lower layers. This can be waste from the ongoing

-11production, so-called new-material waste from the edge sections of the strips or discovery waste, but also material derived from the recycling of plastic waste. The amount of recycled material to be added is governed by the type of material and only enough recycled material can be added to meet the desired material properties of the plastic strips.

Alternatively, the plastic strips or sheets of the invention may be provided with a nonwoven or reinforcing fabric, which is arranged, for example, between the layer and the next layer to give the plastic belt an even greater strength and dimensional stability.

The plastic strips according to the invention may, in particular when used as floor coverings, be provided with a thermally insulating and / or acoustic insulating layer on the underside, which may for example consist of a foamed plastic, a cloth of sufficient thickness, textile fabric, cork or cork pulp.

The plastic strips or sheets according to the invention are produced by first producing separately the individual layers (foils), which are subsequently welded in a known manner.

For the production of the individual films, the polymeric binder and, if appropriate, the auxiliaries, fillers, recycled material and others used, are premixed and plasticized by means of an agitator, twin-shaft extruder, planetary extruder or rolling machine. Subsequently, the plasticized mass is processed by suitable machines, for example calenders, double belt presses, optionally with a fleece or reinforcing fabric, to a layer of the desired thickness. Then the corresponding layers can be overprinted or printed. The welding of the individual foils is then effected, for example, by an Auma machine or a vulcanizing press with a cooling zone, the cooling zone being preferred on the machine to reduce sticking problems. It can be applied simultaneously or sequentially to the underside of the plastic strip in the usual manner, if desired.

-12heat and / or soundproofing layer.

The multilayer plastic strips according to the invention were subjected, inter alia, to the following tests:

1. Resistance to deformation by means of ball deformation experiments / DLW AG test code for flexible floor coverings - internal company standard /:

This test is intended (taking into account DIN 16952 T 1 - 5, DIN 16 851, DIN 18173) to determine the behavior of laminated floor coverings during sliding movement and elastic deformation, similar to the stresses induced by a wheelchair. The test is carried out by a Stuttgart wear tester according to DIN 51 963, modified to a weight of 34 kg, a ball of 20 mm diameter, a cooling blower and a non-swinging deformation segment used. The test specimen (190 x 190 mm) with the thickness of the plastic sheet or plate just made was glued to an aluminum plate with a double-sided adhesive strip. Prior to testing, the specimen was stored in a climatic room in a normal climate for at least 24 hours (DIN 50 014-23 / 50-2). In the test, the sample was then attached to the swivel plate of the abrasion tester and the counter was set to 1000 double strain strokes. Cooling is used for the test. The measure of evaluation is the number of double deformation strokes achieved until blistering begins. The minimum quality requirement for mobile chairs is to perform at least 1000 double strokes until blistering begins.

2. Pressure test according to DIN 51 955

3. Pressure test with short punch pressure test / DLW AG test of flexible floor coverings - internal company standard /

This DIN 51 955-based test serves for the short-term determination of the return to the original position and hardness of the floor covering. Thickness gauge / cylindrical shank flat surface: 6mm, 0.03 N / ram ² / and pressure tester / round punch die diameter: 11.3 mm / according to DIN 51 955 4.1 a 2.4 Three test specimens (100 x 50 mm) are separated over the width of the strip, whereby the edge spacing of the test is stored at least 50 mm in a normal DIN climate. At least 48 hours until 50 014-23 / 50-2. The test has the following steps:

- thickness measurement and marking of the measuring point

- placing the sample in the center of the pressure tester, setting the dial indicator to zero by turning the spindle wheel, a preliminary force of 3 N

- shock-free load for 5 seconds, full load 1 kN

- read the depth of pressure after a minute and cancel the test load

- the sample remains in the instrument, after a further minute, the residual pressure is determined by applying a pre-force, the determination of the return to the original position (elasticity) and the hardness index / index / are calculated according to the following formulas:

pressure (lmin - comp. pressure (lmin) return to original position = x 100 indentation (1 min) indentation (1 min) hardness index IT = x 100 thickness mm

4. Thickness loss after 20 cycles according to D1 N 51 963

5. Dimensional and dimensional stability according to D1 N 51 962

6. Coherence test of layers according to D1 N 53 357

7. Fire resistance test according to D1 N 4102

Unless otherwise stated, all amounts are in percent by weight and temperature in ° C.

DETAILED DESCRIPTION OF THE INVENTION

The following example is intended to explain the invention in more detail.

Production of a transparent coating / clear coating /

25.0 R24 MA 005 (ethylene methyl acrylate copolymer) Elf Ato-Chemistry 45.0 Dowlex® 2045 E (ethylene-octane copolymer) DOW 10,0 Vestolen® P 5300 (PE-PP-Randon copolymer) Huls AG 18.6 Vistalon® 808 E (ethylene propylene rubber) EXXON 0.2 Irganox® 1010 (Anti-oxidant) Ciba-Geigy 0.2 Bärobub® FTA (stearic acid, lubricant) Bärlocher 1.0 Tebesdtrat® BK (Antistatic agent) Boehme

100.0

All of the above components were mixed in a whirling machine (fa.Hensshel) and plasticized for about 5 minutes in a GK 5 mixer by Werner and Pfliderer (mass temperature 190 ° C to 200 ° C). The plasticized mass was transferred at a temperature of 185 ° C to a rolling machine (Schwabenthan) and further homogenized. Subsequently, the mass in a four-roll calender (fa.Bersdorff) was pulled onto a 0.4 mm thick film.

cylinder cylinder temperature speed m / min 1 160 ° C 7 2 160 ° C 8.5 3 160 ° C 9.5 4 160 ° C 8.0

In this way, a film-like product is obtained which is sufficiently transparent so that the printed image is clearly recognizable after any negative pressure has been applied.

Production of the interlayer

24.7 Dowlex®2045E (ethylene octane copolymer) DOW 10,0 Lotryl® 24MA 005 (ethylene methyl acrylate copolymer) E1F ATO-Chemistry 20.0 Sillitin® N35 (Quartz / kaolinite) Hoffmann Mineral 40.0 Omyacarb® 6 (Chalk) Omya 5.0 pigments (for example, titanium dioxide) napr.Kronos 0.2 Irganox® 1010 (Antiocxidant) Ciba-Geigy 0.1 Bärolub® (stearic acid) Bärlocher

100.0

All of the above components were mixed in a whirling machine (fa.Henschel) and plasticized in a GK 5 mixer by Wemer and Pfleiderer for about 5 minutes (mass temperature about 180 ° C). This mass was fed directly from the Schwabenthan rolling machine (roll temperature 140 ° C) to a three-roll calender (fa.Berstorff) and applied directly to a Schuller glass sheet (Shuller SH 50) (film thickness 0.3 mm).

cylinder cylinder temperature speed m / min 1 130 ° C 8 2 130 ° C 8.7 3 130 ° C 9.5

-16This provides a film provided with a runic liner.

Production of lower layer recipe for new material

4.7 Vestolen® 5300 (PE-PP-Random copolymer) Huls 20.0 Dowlex® E (ethylene octane copolymer) DOW 10,0 Lotryl®24 MA 005 (ethylene methyl acrylate copolymer) Elf Ato-Chemistry 50.0 Sillitin® N 85 (Quartz / kaolinite) Hoffamann Mineral 50.0 Omyacarb® 6 (Chalk) Omya 5.0 pigments (for example, titanium dioxide) for example, Kronos 0.2 Irganox® 1076 (Anti-oxidant) Ciba-Geigy 0.1 Bärobub® FTA (stearic acid) Bärlocher

100.0

Recipe recycled

Instead of the above recipe for a new mass, ground waste from the edge strips of the finished floor covering can also be used relative to the proportion, or else foreign recycled in an amount of up to 50% based on the total amount of the layer.

The ingredients according to the formulation were mixed in a swirling machine (fa.Henschel) and plasticized for 4 minutes in a GK 5 mixer by Wemer and Pfleiderer (mass temperature 180 ° to 190 ° C). The mass was fed by a Schwabenthan rolling machine (150 ° C roll temperature) directly fed to a four-roll calender (f. Berstorff) and a foil having a thickness of 0.5 mm was produced.

-17 cylinder temperature cylinder

140 ° C

140 ° C

145 ° C

145 ° C speed m / min

11.5

12.5

11.5

Interlayer suppression

According to the above process, the intermediate layer produced was printed with a four-color gravure printing machine from Dornbusch from roller to roller with intermediate drying and final drying. K + E printing ink from Stuttgart in special colors was used. The binder was aligned with the substrate. The printing substrate was subjected to a corona discharge (about 40 m / min) before printing.

Drying temperatures:

Channel 140 ° C channel 240 ° C channel 340 ° C channel 460 ° C

The dry ink deposition was about 15 to 20 g / m ² with full-area printing by each roller.

Joining of individual foils

The individual films were welded to the following overall assembly:

Covering layer / clear layer / 0.4 mm

Interlayer with carrier fleece, printed 0.3 mm bottom layer, triple 0,5 0.5 mm

2.2 + 0.1mm

-18The individual layers / foils / tread of the machine were fed for welding. Mehler into the Berstorff welding machine, where they were welded to a composite layer at a drum temperature of 100 ° C. The backsheet and interlayer were pre-heated with an infrared emitter to a surface temperature of 180 ° C. The belt speed was 2.0 m / min., The belt pressure was 200 bar = 4 bar partial pressure. Subsequently, a 100% UV-crosslinkable varnish (type LM 720, by Lott Bielefeld) in a quantity of 15 to 20 g / m ^{2 was} laminated to the floor covering in the same working process using a reversible roller coating machine. The crosslinking took place in an included UV-channel equipped with four UV lamps, with an output of 120 W / cm, adjustable between 50 and 100%. The first radiator was adjustable for the gloss control.

The multilayer plastic sheet obtained in this way has the following floor coverings specifying the properties:

Thickness 2,25 ± 0,1 mm

Resistance to elastic deformation in the ball deformation test (DLW AG - internal company standard):

> 5000 double strokes to start blistering

Pressure test according to DIN 51 955:

default thickness 2,29 mm Discharge 0.48 mm residual pressure 0.11 mm return to original position / 150 min / 77.1%. index 21.0

-19Pressure test for short term punch / DLW test

AG - Internal Company Standard /:

default thickness

2.29 mm pressure / 1 min./

0.45 residual pressure / 1 min /

0.12 mm elasticity index

73.3%

19.7

Thickness loss according to DIN 51 962:

after 20 cycles of 0.07 mm

Dimensional and dimensional stability according to DIN 51 962:

longitudinal -0.17 mm transversal + 0.14 mm dish was not measurable

Coherence test according to DIN 53 357:

Useful layer separation, peel resistance longitudinal 38.6 N / 5 cm transverse 37.2 N / 5 cm

Fire resistance to DIN 4102:

Claims (23)

PATENT CLAIMS Multilayer plastic sheet or board with a cover layer and at least one further layer, characterized in that at least one layer comprises at least one ethylene-alkyl acrylate copolymer. Multilayer plastic sheet or board according to claim 1, characterized in that the cover layer is transparent. Multilayer plastic sheet or board according to claim 1, characterized in that the cover layer comprises at least one ethylene-acrylacrylate copolymer. Multilayer plastic sheet or board according to one of the preceding claims, characterized in that the ethylene acrylate copolymer contains 4 to 30% by weight of alkyl acrylate. Multilayer plastics sheet or board according to one of the preceding claims, characterized in that the coating layer contains at least 5 to 70% by weight of an ethylene-acrylacrylate copolymer. 6, wherein the alkyl acrylate is ethyl acrylate. Multilayer plastic sheet or board according to one of the preceding claims, characterized in that the alkyl acrylate in the copolymer is methyl acrylate, ethyl acrylate, butyl acrylate or any mixture thereof. A multilayer plastic sheet or board according to claim 1 Multilayer plastic sheet or board according to one of the preceding claims, characterized in that the ethylene-alkyl acrylate copolymer is a random copolymer or a block copolymer. 9. Multilayer plastic strip by Claim 8 characterized s a T that ethylene-alkykrylátový copolymer is a statistical copolymer. 10. Multilayer plastic strip or board by one A method according to any one of the preceding claims, characterized in that the cover layer additionally comprises a further polymer. 10, characterized in that the other polymer is a homo- or copolymer of ethylenically unsaturated compounds or any mixture thereof. 11, characterized in that the other polymer is at least one polymer selected from a homo- or copolymer of ethylene and / or propylene, isotactic polypropylene, an ethylene copolymer with at least one additional alkene of up to ten carbon atoms, EPDMterpolymer, EPM rubber, SIS and or SBS block copolymer, PE-HMW and PE-UHMV. A multilayer plastic sheet or board according to claim A multilayer plastic sheet or board according to claim Multilayer plastic sheet or board according to one of the preceding claims, characterized in that the plastic sheet has a pattern applied by underpressing the transparent covering layer and / or by underpressing underneath the lying intermediate layer. Multilayer plastics strip or board according to one of the preceding claims, characterized in that the covering layer additionally contains customary auxiliaries. Multilayer plastic sheet or board according to claim 14, characterized in that the auxiliaries comprise at least an antistatic and / or antioxidant additive. Multilayer plastic sheet or board according to one of the preceding claims, characterized in that the covering layer has a usual finish or lacquer on its surface. Multilayer plastic sheet or board according to claim 16, characterized in that the top side of the covering layer was subjected to a corona discharge before the application of the finish or varnish. Multilayer plastic sheet or board according to one of the preceding claims, characterized in that the at least one further layer comprises polymeric binders, customary fillers and optionally auxiliaries. Multilayer plastic sheet or board according to one of the preceding claims, characterized in that at least one further layer comprises recycled material. Multilayer plastic sheet or board according to one of the preceding claims, characterized in that the plastic sheet has an additional thermal and / or sound insulating layer on its underside. Method for the production of plastic strips or sheets according to one of Claims 1 - 20, characterized in that the cover layer, the intermediate layer and optionally another layer (bottom layer) are produced separately, wherein the components of the subsequent layers are premixed and plasticized, by means of a method to form a surface layer, optionally at least an intermediate layer or a backing layer being provided with a nonwoven or reinforcing fabric, then optionally lowering the underside of the cover layer and / or suppressing the upper side of the intermediate layer lying thereon; the bundle is optionally provided with a heat and / or soundproofing layer on the underside. Use of multilayer plastic strips or boards according to one of claims 1 to 20 as wall, ceiling or floor covering, decorative foil or artificial veneer. Use according to claim 22, characterized in that the multilayer plastic strip or board is used as a floor covering.