LU81653A1 - COVERING OF FLOOR OR WALL, WATERPROOF TO MIGRATION OF ORGANIC PRODUCTS AND PARTICULARLY PLASTICIZERS, AND METHOD FOR MANUFACTURING THE SAME - Google Patents

Description

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The present invention relates to a floor or wall covering, impervious to the migration of organic products and in particular plasticizers, as well as to a process for manufacturing such a covering.

5 It is known that the migration of certain elements through the various constituent layers of vinyl floor or wall coverings, and in particular of coverings with a transparent wear layer, poses significant problems when using these coatings, specially by modification of their external appearance.

This is how we can observe phenomena of migration of water vapor, resulting in the appearance of opalescent white spots, of migration of plasticizing products leading to preferential soiling at the traffic and / or migration of organic products or colored minerals, alone or carried by the plasticizers mentioned above, causing colored spots all the more visible the thicker the transparent layer.

The study of these phenomena has led the applicant to seek the means of producing a coating which is impervious to these migrations and particularly to the migration of plasticizers, this coating having to comprise at least one continuous layer, forming a barrier.

There are already composite coatings in which a barrier layer is interposed. This is how French patent application 2 295 838 describes a fiber-reinforced coating consisting of a layer of foam with an additional underlying stop layer. However, this barrier layer essentially aims to improve both the app-, - g - aptitude for elastic recovery and the acoustic properties (soundproofing) of the composite coating obtained. Indeed, the very nature of this barrier layer (possibly plasticized vinyl chloride, etc.), if it allows to possibly constitute an obstacle to the glue rising, makes it ineffective with respect to the products of Cryptogamic degradation, since the cryptogams feed on the plasticizers contained in the layer and their metabolic by-products are colored, migrate in the plasticizers and appear as spots in the transparent wear layer. Likewise, the constitution of the barrier layer described in French patent application 2 295 838 prevents it from obstructing the migration of plasticizers which may be present in the subsequent treatment products. The sensitivity of plastisols to plasticizers is indeed well known.

The Applicant has therefore been led to search for means of producing a \ rinyl coating which is perfectly impervious to the migration of organic products and especially plasticizers. Its aim is to produce a coating comprising a continuous layer, forming a barrier, and made of a material which is chemically inert with respect to organic products whose migration is to be prevented, and in particular plasticizers.

25 Thus, the subject of the invention is a vinyl floor or wall covering, impervious to the migration of organic products and in particular plasticizers and which is characterized by the presence of a continuous barrier layer made of a material insensitive to plasticizers. Depending on a particular embodiment, the continuous r- 3 - barrier layer is interposed between the backing layer of the covering and the decorated wearing layer.

The continuous barrier layer can also itself constitute the backing layer of the coating.

The continuous barrier layer is advantageously made up of a polyester film and more particularly of a polyethylene glycol terephthalate film. It can also consist of a polytetrafluoroethylene film.

According to another characteristic of the invention, the continuous barrier layer consists of a polymer or of a polyurethane-polyester co-polymer modified by an acrylic resin.

In addition, it is often necessary, for aesthetic purposes, to mask from the eyes of the user, any stains which may form under the barrier layer and which, without migrating through the latter, can appear by transparency and affect the good appearance .exterior of the coating.

For this purpose, and in the case where the barrier layer consists of a transparent film, an opaque layer is interposed between the barrier layer and the transparent wear layer.

According to another embodiment, the film constituting the barrier layer may itself be colored, thereby making the presence of the opaque layer unnecessary.

The invention also relates to a process for manufacturing the migration-tight coating according to the invention.

According to a first embodiment, the film constituting the barrier layer is applied by thermal lamination - '± - Λ on the back layer covered with plasticized PVC and the heat-sealing treatment simultaneously ensures the pregelification of the layer of PV C.

The film constituting the barrier layer can also be applied, by thermal lamination, to the back layer covered with pregelified plasticized P V C.

"According to another embodiment, the film constituting the barrier layer is obtained by application, according to a process known per se (coating, licking, roller thousand Ί Γ \ υ points ...), of a film-forming product crosslinkable under form of a true solution or emulsion, followed by a crosslinking treatment carried out in a manner known per se, by heat treatment, or under ultra-violet radiation or under an electron beam.

^ 5 The present invention will moreover be better understood, 1 with the aid of the description which follows with reference to the appended schematic drawing in which:

Figures 1 and 2 are schematic views of a line for manufacturing the migration-tight part of the re-garment according to the invention, in which the barrier layer is obtained by laminating a continuous film.

Figure 3 is a schematic view of a production line of the migration-tight part of the coating according to the invention in which the barrier layer is ob-25 by application of a true solution or an emulsion * '' a crosslinkable film-forming product.

In FIGS. 1, 2 and}, 2 is the base constituting the back layer of the covering, 3 is the barrier layer and ji the migration-tight part of the covering according to the invention.

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As can be seen in FIG. 1, a continuous film of material resistant to plasticizers constituting the barrier layer 3 ,, coming from the roll jî, is applied, according to a continuous process, to the face previously coated 3 with PVC plasticized by means of of the device shown schematically in 7, "of the back layer jî coming from the roll jS. The lamination operation by heat sealing the film constituting the barrier layer 3 and the backing layer 2 constituting the coating base 10 is carried out by passing over the cylinder _8, heated to> a temperature varying according to the nature of the film against -Paste between 60 and 180 ° C, and which is preferably between 125 and 140 ° C. This heat treatment simultaneously ensures the pregelification of the layer of P V C plasti-15 fié previously applied to the coating base. f In the device represented in FIG. 2, the continuous film constituting the barrier layer 3. coming from the roll 5. is applied, according to a continuous process, to the face previously coated with plasticized PVC and pre-bonded with the backing layer coming from of the roll (5. The operation of thermal bonding of the film constituting the barrier layer 3_ and of the backing layer 2_ constituting the coating base is carried out by passing over the cylinder 8 ^, heated to a temperature varying according to 25 la nature of the film to be laminated between 60 and 180 ° C., and which is preferably between 125 and 140 ° C.

After passing over the detour rollers j), the migration-tight complex j4 obtained is cooled, in a conventional manner by passing over the cooling cylinder 10.

The film constituting the barrier layer 3 can be made up of any continuous film resistant to plasticizers.

Thus, for example, it may be a polytetrafluoroethylene film or a polyester film of the polyethylene glycol terephthalate type. In these cases, a pretreatment of this film, for adhesion with PYC is necessary, this pretreatment possibly being able to be carried out on the production line even by a conventional application device (coating, heliographic cylinder, etc.) not shown. . It is also possible to use a polyester film already pretreated during its manufacture.

In the embodiment shown in FIG. 3j, the migration-tight barrier layer 3. is obtained by applying, using the device shown diagrammatically at 12, a true solution or an emulsion 15 of a film-forming product. crosslinkable _13. on the face previously coated with plasticized PVC of the backing layer 2 ^ coming from the roller 6_ by conventional coating, thousand point roller, heliographic cylinder or any other device of a type known per se, capable of applying, over the entire surface of the backing layer a uniform quantity of crosslinkable film-forming product 13 "

The backing layer J2 coated with the crosslinkable film-forming product 13 then passes into the crosslinking device 14 which may be, depending on the nature of the product to be crosslinked, an oven, a U V radiation chamber or an electron beam device. It is in this device; JA that the formation of the barrier layer 3 will be ensured in the form of a continuous film, impermeable to migration, by evaporation of the solvent or by rupture of the emulsion, and by crosslinking of the film-forming product. The complex _4 coming out of the JlA device is then, as in the previous embodiment, made up of the coating base 2 and the barrier layer 3 ·

The film-forming product _13 can consist of any solution or emulsion of product capable of forming, after crosslinking, a film resistant to plasticizers.

This is how it can be a polymer or a polyurethane-polyester copolymer modified by an acrylic resin.

Depending on the nature of the film-forming product applied, it may also be necessary, after the crosslinking operation, to carry out a P Y C adhesive treatment, known per se and not shown, to ensure the good performance of the complex produced.

The conventional operations for obtaining a vinyl floor or wall covering then follow, and are not shown in the drawing.

Thus, in the case where the barrier layer 3 is transparent, the face of the complex carrying the barrier layer 3 is coated with an opaque layer intended to mask any stains occurring from the user's yetix. under this barrier layer without however crossing it. It is understood that, in the case where the barrier layer 3 is itself opaque or colored, the presence of this opaque layer is not necessary. The decoration is then applied by printing, either directly on the barrier layer _3, or on the opaque layer, and one finishes by applying, on the decoration, a layer of transparent wear.

30 The covering base or backing layer 2_ can be, - 8 - Ί * ι 'as it is known per se, consisting of any conventional base: nonwoven or felt coated with vinyl plastisol, calendered vinyl sheet, expanded vinyl coating embossed, with or without polyester support ... these re-5 clothing bases being given only by way of example.

The following examples will moreover illustrate the invention without however limiting it.

Example 1

On a coating base consisting of a support, textile or mineral coated with plasticized P V C having the following composition: PVC 100

Plasticizer (phthalate) 125

Thinners (mineral spirits) 5

15 Fillers (calcium carbonate) kOO

* Stabilizer (zinc octoate) 2 is applied according to the method described with reference to FIG. 1, im film 3. of transparent polyethylene glycol terephthalate, pretreated for adhesion to PVC, of the Meli-20 nex type ref. 5 ** 2, (I.C.I) with a thickness of 36 / * -. The base 2 / film 3_ assembly passes over a cylinder £ 5 brought to 120 ° C., where both the pregelification of the PVC and the lamination are carried out, then over the cooling cylinder _10 leading to the production of the complex 4 ^ . The production speed is 25 of 10 meters / minute.

Apply by coating on the face of the complex. carrying the film 3. a layer of opaque plasticized PVC having the following composition: PVC 100 30 Plasticizer (phthalate) 60 - 9 - * 1 l

Stabilizers (Ba, Ca, Zn) 2

Titanium oxide 10

Fillers (calcium carbonate) 60

The decoration is then applied to the face carrying the opaque coiiche by heliographic printing in a conventional manner, then a transparent wear layer of composition: PVC 100 is applied to the decoration

Plasticizer (phthalate) 30. 10 Epoxy oils 3

Stabilizers (Ba, Ca) 2

This gives a perfectly waterproof coating to the migration of plasticizers in which the sole layer accumulates, during use, the cryptogams and their by-products, which usually gives it a red coloration masked by the presence of the opaque layer. , white, which optically isolates the decoration of the sole layer.

Example 2 On a coating base consisting of a pre-gel plasticized P V C sole having the following composition: PVC 100

Plasticizer (phthalate) 125

Thinners (mineral spirits) 5 25 Fillers (calcium carbonate) 400> Stabilizer (zinc octoate) 2 i t is applied according to the process described with reference to fig. gure 2, a film 3. of transparent polyethylene glycol I terephthalate of the same type as that described in Example 1.

! I 30 The base 2 / film 3 assembly passes over a cylinder 8 brought to! ί -ιο 120 ° C where lamination takes place and then on the JLO cooler cylinder leading to the production of the _4 complex.

The production speed is 100 meters / minute.

The sequence of operations is the same as that described in Example 1.

Example 3

A layer of opaque plasticized P V C having the following composition is applied directly to the film 3 of transparent polyethylene glycol terephthalate of the type described in Example 1.

Plasticizer (phthalate) 60

Stabilizers (Ba, Ca, Zn) 2

Titanium oxide 10 15 Filler (calcium carbonate) 60

The following operations (application of the decoration and the transparent wear layer) is that described in Example 1.

In this case, it is the barrier layer which constitutes by itself 20, the back layer of the coating insensitive to migration according to the invention.

Example 4

On a coating base £ similar to that described in Example 2, 25 g dots of 15 g / m2 of a solution in solvent medium of a polyester polyurethane modified with an acrylate of the type are applied by means of a screened cylinder 25 thousand points * marketed under the brand Quinn LG 3 ^ 47 C by the company QÜINN, the viscosity of which is optionally adjusted using an acrylic monomer which reduces viscosity, 30 Obtaining the complex (t consisting of base 2 and from - 11 -

t * I

the barrier layer J. of modified polyurethane-polyester is ensured by passage through a dryer with ultraviolet rays in tubes at a speed of 11 meters / minute and per tube; is then carried out on the re-ticulated barrier layer, an adhesive treatment intended to allow * 1 * adhesion of the subsequent co ^ ιches of PV C. This treatment is carried out by application of 3 g / m2, with a point-sided roller, of a 10% solution in methyl ethyl ketone of an ADCOTE 1077 polyester resin sold by the company NORTON and WILLIAMS, followed by a reactivation treatment at 120 ° C.

The application of the opaque layer, of the decoration and of the wear layer takes place under the conditions described in example 1.

K

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Claims (8)

1. Floor or wall covering impermeable to the migration of organic products and in particular plasticizers, characterized in that it comprises a continuous barrier layer 5 made of a material insensitive to plasticizers. 2. Coating according to claim 1, characterized - in that the continuous barrier layer is inserted between the back coating layer and the decorated wear layer. 10 3 - Coating according to claim 1, characterized in that the continuous barrier layer itself constitutes the backing layer of the coating. k - coating according to any one of claims 1 to 3) characterized in that the continuous barrier layer consists of a polyester film and in particular a film of polyethylene glycol terephthalate. 5. Coating according to any one of claims 1 to 3, characterized in that the barrier layer consists of a polytetrafluoroethylene film. 6. Coating according to claims 1 and 2, characterized in that the continuous barrier layer consists of a polymer or a polyurethane-polyester copolymer modified with an acrylic resin. 2 5 7 “Coating according to any one of claims 1 to 6, characterized in that an opaque layer is. sandwiched between the barrier layer and the transparent wear layer. 8. Coating according to any one of claims 1 to 6, characterized in that the barrier layer is t T 13 "opaque. 9. A method of manufacturing the floor or wall covering according to any one of claims 1, 2, k, 5 and 8, characterized in that the film constituting the barrier layer 5 is applied by thermal laminating on the layer backing covered with plasticized PVC and heat-sealing treatment simultaneously pre-gelates the PV C layer. 10. Method according to any one of claims * 10 1, 2, 4, 5, 7 and 8, characterized in that the film constituting the barrier layer is applied by thermal lamination on the back layer covered with plasticized PVC pre-gel. 11. A method of manufacturing the coating according to any one of claims 1, 6, 7 and 8, characterized in that the film constituting the barrier layer is obtained by application, according to a method known per se (coating, licking, roller mille-points ...) of a crosslinkable film-forming product in the form of a true solution or emulsion, 20xxxxxxn treatment of reticulatioï / carried out in a manner known per se by heat treatment, or under ultra-violet radiation or under electron beam. VS *