Flooring with low elongation and high dimensional stability, carpet tile, a method of manufacturing a coating, the method of manufacturing carpet and the method of placing the coating on the black floor

 

(57) Abstract:

The invention relates to a floor covering with low elongation and high dimensional stability. The coating of the polymer-containing NAP material, which is attached to the polymer-containing first layer of base to the back side of which is fastened by means of an intermediate adhesive layer, the bottom second layer basis. The second layer of the framework includes needling fibrous structure of thermoplastic polymer-containing continuous or cut fibers, bonded together by heating. The adhesive layer consists of an organic polymer-containing binder, activated by heating. At least the second layer of the substrate and/or a binder layer composed largely of usable recyclable material. After manufacturing the carpet is rolled on the so-called shirokolaka shafts and may, if desired, partially cut into carpet tiles. Thus, carpet tiles and hyrocodone carpets can be produced during the same production process. The technical result consists in the creation of floor coverings that have the same strength, dimensional stability and comfort that directorythe. The new coating suitable for both solid carpets and carpet tiles. 5 C. and 22 C.p. f-crystals, 12 ill.

In the present invention it comes to flooring with low elongation and high dimensional stability, consisting of NAP material contained in the first layer of base to the back side of which is attached by adhesive bottom layer, the second layer bases. Further, in the invention it comes to the method of manufacturing a floor covering of this type, in which at the initial stage of production is made canvas-prefabricated, includes felted material attached to the first layer of Foundation.

Art

Flooring with low elongation and high dimensional stability includes a solid (often also called directcanada) carpets and carpet tiles, showing a low degree of shrinkage and/or stretching in the length and/or width and, consequently, possessing a high capacity of resistance to the various fluctuations of humidity and temperature during operation. The dimensional stability of the carpet tiles used today, especially in enterprises, due to their structure significantly higher than hyrocodone carpets. To compensate for n is glued to the black floor by means of a permanent adhesive. Carpet tiles only stacked and glued by means of substances, increasing the adhesiveness (stickiness), or simply held in place under its own weight.

Known manorastroman and malousadochni flooring, made in the form of solid carpets consist of paintings of the material with pile material, which is attached to the first layer of the base, with the second layer of the framework, which, for example, may consist of a sheet of natural rubber, chalk (with filler calcium carbonate) foam of SBR-latex, or polyurethane foam, or similar materials. These layers foundations are usually made with a thickness of 2 to 8 mm because Of its elastic properties of the layers of the basics of the foam significantly contribute to the comfort when walking, and also provide good heat and sound insulation.

These layers known the basics of the foam, however, entail adverse effects on the environment, which is undesirable, especially in light of the strict currently the requirements for an environmentally friendly and recyclable products. Under recyclable products refers to products that contain components that takticheski zero percent residual ash content. Strata fundamentals of foam is often allocate residual gases for extended periods after production, which entails the risk of deterioration of the atmosphere in the premises, where was spread a carpet. At the same time there is a problem, which consists in the fact that the layers of the basics of foam after use of the floor covering for some time as well stick to the underlying floor layer basics of foam are often very large areas is separated from the floor coverings, when entertained flooring removed. Large areas of adhering remnants of the strata fundamentals of foam must then be removed by requiring time-consuming operations on the floor before you lay the new flooring.

The most significant disadvantage of the known floor covering with a layer basics of foam, however, is the limited capacity of the elimination of used carpet and the associated adverse impacts on the environment. If, for example, the basics of chalk foam of SBR-latex on one-piece worn carpets in destroying it is possible to achieve almost Tracii inorganic substances, which remain after combustion in the form of ash.

All known carpet tiles are widely used in particular as a so-called project carpeting, i.e. carpet, especially designed for construction and industrial applications. Here, under a carpet tile refers to a piece of carpet in the correct forms, which are measured according to standards developed specifically for the purpose of inspection agencies, such as, for example, TNO) has a stable shape and dimensions sufficient to form a continuous floor covering in any conditions.

For such applications carpet tiles have great advantages in comparison with traditional directcanada carpets. Tiles, for example, can be easily lifted, making it easy to access the space under the floor for installation or reinstallation, for example, computer and electrical cables. Carpet tiles can be laid without unnecessary interruption of normal activity in the room. In addition, carpet tiles can be easily replaced locally, which is an advantage when certain parts of the premises are used more intensively than others. Onlogout to cause serious tranportirovochnye problems.

Known carpet tiles are usually equipped with relatively heavy second layer of the substrate and a binder layer, to ensure the stability of their shape and size. The second layer bases are usually made from durable coating of glass fibre reinforced bitumen or glass fibre reinforced PVC coating. The share of traditional carpet tiles so approximately 5 kg per sq m

A typical example of such carpet tiles is described in European application N EP 0 278 690A2. In order to create a carpet tile with a small osadochnomu, good dimensional characteristics, and is suitable for production of mass-production method, it is proposed carpet tile, which consists of a fibrous face wear, mounted on the first sheet base, the first preliminary layer located on the surface of the first sheet base, and containing molten bitumen or petroleum resin, the second preliminary layer attached to the first layer of coating and the second coating layer contains bitumen hot melt adhesive, the third layer bases containing bitumen hot melt adhesive, and the material of the second sheet to ensure that messagecast carpet and treasuretrove material fiberglass, and due to the high total weight of the tiles.

In order to further improve dimensional stability, in European application N EP 0 420 661A2 describes carpet tiles containing surface wear, first base, consisting of solid, termolayers composition, the second key is composed of contiguous layers of porous sheet material fiberglass, for example, fabric or non-woven fiber, and porous fibrous sheet material with a fibrous sheet material as the outer surface of the second layer of the substrate, and in which the hot-melt adhesive penetrates into the fiberglass material and fills it, but only partially penetrates into the fibrous sheet material, enough to to bind the fibrous sheet material. A typical carpet tile is composed of fibrous carpet material, in which the first base is bituminous composition or the composition of the formed modified bitumen hot melt glue. The second pillar consists of separate contiguous layers of porous lightweight sheet of fiberglass fabric, which in itself makes carpet tiles improved dimensional stability. According to the invention, the sheet material of non-woven polypropylene by itself is not satis is 9A1 was declared 30.12.1992 g and published 06.04.1994, (Article. 54(3)EPC) for Germany, France, the UK and the Netherlands. It confirmed the disadvantages of the previous art of carpet tiles, which consisted of bitumen/asphalt part of the Foundation or the basis of polyvinyl chloride. According to one variant of this invention, it is proposed the carpet in the form of tiles, comprising a core part and an upper layer formed on the main body, both of which are made of a propylene resin. Preferably the top layer includes a core sublayer of fabrics and tufted sublayer, both of which are made of a propylene resin. Although reference is made to the polypropylene fiber as part of the top layer, the main part is described as made or from propylene, monopoliser or copolymers of propylene and ethylene-butene-1, and similar substances, which may represent the regeneration product of a propylene resin. Is preferred to the use of amorphous alpha-reinkemeier, and, in fact, the only particularly described example are the main parts manufactured by extrusion molding. The document contains no references to the needle and fabric part of the basics.

Known carpet tiles, however, have a large number of negoitescu of the materials used. When they are burned, a significant portion, up to about 60% by weight, biomateriaux tiles remains in the form of ash.

Combustion products such as tiles with PVC layer basis, requires a high energy combustion, because PVC contains chlorine, which absorbs energy during combustion, instead of giving energy. Chlorine is a toxic and corrosive gas, which readily reacts with other inorganic and organic substances, so the burning floor coverings with layers basics of PVC requires special environmental protection measures during the combustion process.

Moreover, it is expected that problems associated with recycling of carpet tiles will be worse in the future, due to the large number of laid annually and replaceable carpet tiles (in Europe more than 40 million square meters with a weight of approximately 200 000 t), legal requirements for environmentally friendly recycling such, can be expected in the near future.

In addition, because of their relatively large weight is known carpet tiles can simultaneously be transported and placed in relatively small quantities. Moreover, sushestvennee, the structure of the carpet tiles and hyrocodone carpets are completely different. Therefore, carpet tiles and hyrocodone carpets were traditionally made by different processes and on different types of production equipment. This was due to differences in the above-mentioned materials, which had to use in the carpet industry up to the present time, to meet the requirements, which were obtained using these two different products.

For the manufacture of carpet tiles were used relatively rigid heavy base of bitumen or PVC with glass, and for hyrocodone carpets basis has traditionally been quite flexible, consisting of foam with filler calcium carbonate or similar. Still so impossible was the integration of production of these two types of carpets in the same process.

From a European patent application N EP 0547533 A1 it is known tensile floor, which when laying often stretches over many percent in length and width, after which the edges tensile flooring fixed to the adjacent panels by bands with nails or similar devices. The second layer bases instead is immersed in a fabric binder mass, to report an acceptable strength characteristics of the second layer bases for use as loose floor coverings. Under the cloth binder mass is meant that the fibrous structure may be, for example, attached to poprobyval machine giving to the underlying strength of the frame or that the fibrous structure is equipped with stitches or loops in the longitudinal direction and the transverse cross-section, i.e., according to known principles Maliwatt or Kettenwirk. In the description, however, provides guidance on the production of a layer structure with a fibrous structure, with sufficient dimensional stability in equity and the profile direction and sufficient to make possible the production of malorastvorimaja and dimensionally stable floor covering possessing the same characteristics of strength and messagecast and providing the same comfort when walking, as known floor covering with layers basics of foam, and the same dimensional stability, known as carpet tiles.

The invention

The present invention is the creation of floor coverings with low elongation and high dimensional stability, oblad is known to the carpet, such as sarakatsani carpets with unwanted layers of the basics of foam, and carpet tiles with PVC or biomaterialia layers of foundations, reinforced fiberglass mesh, and at the same time to make possible the exclusion of undesirable impacts on the environment during the liquidation of used floor coverings. New floor covering must be suitable for solid carpets and carpet tiles to use for the selection of the same areas, such as businesses, without the previously mentioned disadvantages not for whole carpet or carpet tiles.

Flooring with low elongation and high dimensional stability according to the present invention is characterized by the fact that the layer of the framework consists of stitched fibrous structure of thermoplastic polymer-containing continuous fibers or strands of fibers interconnected by heating to a temperature which at least corresponds to the lower softening temperature for the material of the fibers in the fibrous structure, and the fact that the adhesive layer consists of an organic polymer-containing binder, activated by heating, and has the reaction temperature, which is lower th is P> Method for the production of floor coverings with low elongation and high dimensional stability, according to the invention is characterized by the fact that mesh second layer consisting of stitched fibrous structure of thermoplastic polymer-containing continuous fibers or strands of fibers is heated to a temperature which at least corresponds to the minimum softening temperature for the materials of the fibers in the fibrous structure, and the fact that the rear side mesh material-semi connects with the canvas of the second layer bases during prokleivanija adhesive layer (the first layer of the substrate and bonding layer), consisting of organic polymer-containing binder having a lower reaction temperature, than the melting temperature of most contained in the fibrous structure of the material of the fibers, and which is activated by heat.

Thus, it becomes possible to perform manorastroman and dimensionally stable floor covering with a second layer of the substrate with stitched fibrous structure and having the same strength and stabilnosti properties both in length and in width, and in cross-section, as well as obespechivali, whether it is a solid piece of carpet or carpet tiles. The invention completely eliminates the impact on the environment destruction in comparison with these floor coverings. This applies to the integral carpets and carpet tiles, because these two types of products intended for use as a floor covering according to the invention, are now identical.

Thanks to the invention of the opportunity on the same equipment to produce a floor covering, which can be used as a one-piece carpet or carpet tiles.

Taking into account considerable thickness and structure of the tiles described in applications for European patents N N EP 0 278 690A2, TP 0 420 661A2, and EP 0 590 189A1 was quite unexpected that a satisfactory floor covering, which is good and as hyrocodone carpets and carpet tiles, can be obtained by avoiding multiple layers of bitumen, fiberglass, etc.

In addition to the advantages from the point of view of environment and lower material consumption and so on, the present invention is of great commercial value for producers hyrocodone carpets that were previously unable PROIZVODSTVENNO low investment gives the manufacturer hyrocodone carpets opportunity to market carpet tiles.

The second layer of the framework is designed in such a way that the frame of thermoplastic stitched fibers from continuous fibers or strands of fibers is heated to the softening temperature of the fibers, so that they stick together, forming a layer basis, with a three-dimensional structure of mechanically interlocking the fibers, where the fibers are mutually fixed to each other. Fiber, which is a three-dimensional focus will be during the application of force and weakening load (effect distance) to resist stress and to some extent to return to its original fibrous structure. This property is called the ability to restore the height, i.e., elasticity. In the fibrous structure according to the invention the individual fibers are connected and attached to each other, forming a three-dimensional fibrous structure, which should be considered in contrast to the fibrous structure, where the fibers are attached to each other only mechanically and can therefore diverge during power effects, so that the stability is greatly reduced and the ability to restore the height will be quickly lost. Due to the bonding of the fibers between the stability of three-dimensional fibrous structure and comfort of the WTO is of the fibrous structure with one side or both sides, or may be performed by blowing hot air through the fibrous structure, or a combination of the above methods of heat treatment. Heating may also be performed by using infrared radiation, i.e., processing of infrared rays or similar ways.

The fibrous structure may consist of continuous fibers, and segments with a length of 20 to 200 mm and thickness of fibers from 1.5 to 50 dtex dtex. Most often the preferred segments of fibers with a length in the range from 40 to 110 mm and thickness of fibers 3,3 - 20 dtex. The weight of the fibrous structure of the second layer bases will lie mainly between 70 g/m2and 1000 g/m2in particular between 100 g/m2and 600 g/m2. The heavy layers of the framework has been used for carpets used where especially high level of comfort when walking.

The fibrous structure may consist of these types of fibers that are either 100% pure or in mixture with different thickness and length. Thus, the fibrous structure may consist of a mixture of natural fibers such as wool, cotton, flax or jute, synthetic fibers, such as polymers and copolymers with polyamide, polyester, polyolefin (polypropylene trattorias acid and various polyglycols and/or other aromatic carboxylic acids and alcohols. Applicable copolyamide can consist of 2, 3 or 4 different polyamides, for example polyamide 6, polyamide 6,6 and polyamide 12. Preferred in the present thermoplastic polymer is polypropylene.

In order to obtain a sufficient stability and strength in the fibrous structure, it should normally contain 25% of the fibers of thermoplastic polymer. The greater the number of thermoplastic polymers, the less widocznosci.

Thus, there were obtained excellent results in terms of comfort when walking and the ability to restore the height of the second layer basis, when the fibers contained in the fibrous structure, is made from 100% identical thermoplastic or mixture of thermoplastics one group of polymers or different groups of the polymers, but with different softening temperatures. The fiber content of the polymer with a lower softening temperature, thus, can be used to increase the heat recovery unit with the rest of the fibers contained in the structure.

The fiber with the lowest softening temperature and melting will act as a ligament during heating, while fibers with higher temperatures RASMAG the shown properties should generally be at least 10oC.

According to the invention fibrous structure may include fibers that are produced by the combination of two different types of fibrous materials, and the core of the individual fibers consists of one type of material, and the surface consists of a modified or different type of material.

The adhesive layer according to the invention consists of an organic polymer-containing binders may be emulsion binder of the aqueous solution of polymeric particles, or may be 100% thermoplastic binder, also known as hot melt glue powder. The binder may be chemically active and include polymers or copolymers, such as butadiene, polystyrene, polyacrylate, polystyrene acrylate, polyvinyl acetate, copolyamides, copolyesters or butadiene nitrile, and can then be include thermoplastic filler. If thermoplastische binder comprising polymers and/or copolymers of polyolefins, polyesters or polyamides, they can be used in the production process to dissipate in the suspension to paste or can be used as is. In the currently preferred binders from SBR-exist they are by capillary transfer is diffused into the backside of the first layer basis from a material-semi-finished products and then diffused into the upper side of the fibrous structure of the second layer basis, and during the subsequent heating of the binder is activated to achieve a good anchorage. In particular, when the surface of the fibrous structure of the second layer bases worked and fleecy, will achieve good penetration and, as a consequence, a good retention of the binder.

It is desirable that the material of the second base and the adhesive layer were waterproof polymers. This is an advantage because the carpet during operation will not change the size, exposed to fluctuations in humidity and temperature. This ensures the dimensional stability of the carpet, while the weight remains relatively low. Low weight lining design (binder and adhesive layer) and the fact that the carpet can easily slide, additionally lead to new and have advantages in terms of production thereof.

According to the invention, the rigidity and the base material and the binder layer are selected so that made so the carpet has sufficient stability for use as carpet tiles, and in shirokolaka shafts and partially cut into carpet tiles.

Especially strong adhesion between the layer of semi-finished product and the second layer of the framework is achieved through the establishment of a stabilizing synergies between the binder and the fibrous structure of the second layer bases. This synergistic effect may, for example, be provided with a fibrous structure comprising fibers, polymers which have mutually different softening temperatures, and where the reaction temperature of the binder at least lies between the softening temperature and melting temperature of the polymer fibers of the fibrous structure, melting first. Thus, the binder penetrates into the surface layer of the fibrous structure will react and communicate with these fibers, rasplavlyaemymi in the first place. Thus, the fibrous structure, and the binder contribute to the clutch. At the same time is achieved by giving strength to stabilize the carpet.

In addition to the above positive properties, provide adhesive substances (first coating layer and a binding substance) and the second basic coverage in the sense of mechanical messagecast carpet, they also have the bol is eat, associated with dimensional stability under climate impacts, is that the material-semi-finished product, for example, consisting of a polyamide or wool "pile" materials, even when it's made from non-shrink the main layers of the framework will shrink and expand due to changes in temperature and humidity.

Previously this problem with dimensional stability, was solved by applying a reinforcing layer of fiberglass or heavy layers basics of bitumen or PVC, as referred to in art.

The design of the carpet according to the invention, on the contrary, achieved saturation of the stabilizing part of the Mat water-resistant polymers. The saturation of these polymers all implemented versions of the new coating is sufficient to prevent reduction of stability due to the penetration of moisture.

Particularly high dimensional stability is obtained when the second base consists of non-absorbent materials, and the main part of the adhesive layer consists of a non-absorbent polymers, after linking. Saturation is achieved by prokleivanija adhesive that penetrates the back side of the material intermediate product and the second pillar, as was described which can be sufficient enough in order to allow some air permeability of the carpet.

For production purposes, in practice, the floor will be primarily based on thermoplastic and hygroscopic materials in the adhesive layer and the second layer of the framework.

From the above description it is clear that the same types of thermoplastic polymers applicable to a large extent as for fibers, and adhesives. Specialist in the art will be able to choose the right ingredients to get the desired melting characteristics without undue experimentation, depending on, for example, whether you choose the fiber, the hot-melt adhesive or thermoplastic filler for adhesive. In a typical case, the exact composition is chosen by the supplier as specified in the specification.

With the elimination of floor covering made according to the invention, there are special advantages for the environment. When the whole structure of the floor covering, i.e., the pile, the first layer of base, binder and the back side is made of organic polymers, the flooring can be burned with the release of energy. As mentioned above, it can be pure thermoplastic polymers is Yong, cotton, jute, wool and combinations thereof. In many countries, such as Denmark, destruction of the waste, like used carpets used incineration with energy recovery.

According to the invention also offers the possibility is particularly advantageous way to melt the used floor covering or treating them chemically with subsequent use in the production of new fibrous floor coverings or other products. In one regard, the whole structure of the floor covering, consisting of a pile, the first layer base, a binder, and a second layer basis, should be made mutually cooperative and recyclable materials. You can, for example, to use the floor design made from 100% polyester-based or design-based polyamides. The benefits would be especially great if the binder contains 100% of thermoplastic materials.

List of figures

In the next part of the invention is described in more detail; refer to different ways of implementation and the drawings, in which Fig. 1 shows a schematic section of a floor covering made according itoi option run in which the first layer of the framework consists of non-woven fibrous structure. Fig.3 shows a stage of the method according to the invention for the production of floor coverings, Fig. 4 shows cut part of the carpet tile according to the invention. Fig. 5 schematically shows an example of the manufacturing method according to the invention and Fig. 6 to 12 show the curves of differential scanning calorimetry (DSC) for a representative selection of polymeric materials applicable in the floor covering according to the invention, as described below.

Examples of specific performance

In the case of floor coverings 1 and 1' shown in Fig.1 and 2, the cloth material-semi-finished product is produced at the initial stage of production, and this material consists of a polymer-containing NAP material 2 and 2' attached to the first polymer-containing layer 3 and 3'. As mentioned in the introduction, and felted material, and the first layer of the Foundation may consist of natural fibers and synthetic or mixtures thereof. In the example shown in Fig.1, the first layer 3 made from a woven first layer of the substrate, or felted material - loopy pile 2. In the example shown in Fig. 2, the first layer 3' is voloknistoyj pile 2'.

The canvas material-semi-finished product 2, 3 or 2', 3' connected by an adhesive layer 4, 4' from the bottom of the second layer 5, 5' respectively and simultaneously heating for the formation of pieces of the covering 1, 1' respectively according to the invention. The canvas floor covering then is cut into solid carpets or carpet tiles of the desired size.

Organic polymermodified binder 4, 4' respectively, which is activated by heat, has a reaction temperature lower than the melting point of the material of the majority of the fibers contained in the fibrous structure. By heating the binder is brought to a temperature lying in the range 60 - 250oC, heat at the same time, of course, depends on the reaction temperature of the binder, which is consistent with the melting point for most types of materials fibers contained in the fibrous structure, as explained below.

As mentioned earlier, emulsion binders can be divided into a group reactive binders and the group of thermoplastic binders. The basis of reactive binders can be basic polymers and copolymers of butadiene policyh emulsion binders, they are thermoplastics, sprayed in suspension before the formation of pasty glue. The basis of thermoplastics can be polymers and copolymers of polyolefins, polyester, polyamides, etc. This type of binder is particularly useful when it is desirable that the floor and the materials of the composite structure can be recycled. For example, polyolesters binder is used when the carpet design contains polypropylene and/or polyethylene fibers.

Adhesive substances may also be present in the form of 100% pure thermoplastics based on polymers and copolymers of polyolefins, polyesters and polyamides. Thermoplastics are applied to the material semi-finished and fibrous structure of the second layer bases in dry form. Can be applied several different methods of powder deposition or application of the melt (hot melt).

When using the powder of thermoplastic binder is applied in powder form between the sheet material intermediate product and the fabric of the second layer of the framework, after which the layers are pressed to each other during heating, so that thermoplastic is activated, melts and bonds the two layers, forming a target substance is heated to become liquid mass, which is applied, for example, by squeezing between the sheet material intermediate product and the second layer bases, which are then pressed together, for example, between rollers.

After subsequent cooling liquid binder hardens and two layers are firmly glued together, forming the final canvas material of the floor covering.

Binder, made from 100% thermoplastic materials, have special advantages when used in cases where the floor consists of mutually compatible and therefore recyclable materials.

In addition, it is important to specify that the adhesive layer can consist of multiple layers applied sequentially. For example, a layer of polyacrylates, including plastic filler, can be applied as a preliminary coating, after which the layer of hot-melt adhesive or adhesive layer of polyethylene powder can be applied as the second adhesive layer. Another example might be applying a layer of hot melt adhesive as a pre-coating with a lower viscosity than the previous layers binders (layers of hot melt or powder).

The following describes the composition of the second layer bases with a weight of about 300 g/m2with 80% of polypropylene fibers having a length of 60 mm to 100 mm and a thickness of 5 to 15 dtex, and 20% extruded polyethylene fibers of high density with a length of 60 mm to 100 mm and a thickness of 7 to 20 dtex. Due to blowing through the fibrous structure of the hot air temperature of approximately 110 - 140oC, devicenote polyethylene fiber of high density soft and are sintered additional 30%. On polypropylene fiber blowing hot air has no effect. Polyethylene fibers are sintered to high density and stick to polypropylene structures, which are thus immobilized in the fibrous structure. After that, the back side of the fibrous structure may Kalankatuatsi. Thus, a fibrous structure, which has both vertical strength and dimensional stability, and horizontal stability.

In another typical sample of the second layer bases fibrous structure has a weight of 600 g/m2and contains 100% polypropylene fibers. There is a wide distribution of molecular weight polypropylene shorter molecular chains are softened first and used for bonding together and fixing the fibers.

Squeezing or getting your picture on the second layer bases can also lead to improvement in the external characteristics of the floor covering.

Flooring hyrocodone carpets, having a structure according to the invention, provides a number of advantages. The fact that hyrocodone carpets, made according to the invention have dimensional stability, equal messagecast carpet tiles, and the fact that they have a uniform surface, makes it possible to install them using increasing the stickiness of the substance, in contrast to the currently used technique when hyrocodone carpets glued to the black semi permanent means of the existing chalk, etc., sit down and stretch depending on changes in temperature and humidity. If this carpet is used, a substance that increases the stickiness, you may experience instability and, as a result, wrinkles. If the substance to increase the stickiness is used when installing hyrocodone carpets made in accordance with the present invention, it is achieved large savings due to reducing the amount of binder and the fact that the binder is easily removed after use. Thus avoids the problems associated with the removal of permanent glue, align and fix the black floor.

It should be noted that in the case of the use of these kinds of flooring, to which the demands and low surface resistance, for example, less than 109Om, to the fibrous structure may be mixed with conductive fibers, or it may be impregnated with the conductive liquid. By use not more than 5% of steel fibers or fibers with copper or Nickel-plated or specified by impregnation of the fibrous structure about 0.8% of conductive fluid based may be attached to surface-contact resistance up to 106Ohm, ismaren the TBA 13 and the upper layer 14. The latter consists of a first layer bases 15 and threads 16, it is capable of piercing. The second layer 12 and the bonding layer 13 is relatively flexible and light, and each of them consists of a material suitable for reuse, for example from recyclable polymer.

Reusable polymer of the second layer 12 and/or the binder layer 13 can be waterproof. The stability of the shape and size of the tile 11, thus greatly increased, since the material of the second layer 12 and/or the binder layer 13 can then practically does not absorb moisture. The base 12 may for this purpose be made of, for example, non-woven polypropylene, while as a binder substance 13 may be used a mixture of latex and polyethylene. The exact mixing ratio of the components of the binder may vary for specific qualities in a particular carpet designs. For example, the mixture may consist of 40% SBR latex and 60% polyethylene. To increase the stability of the tiles 11 for the first layer bases 15, it is preferable to use a material, which very well corresponds to the second layer 12 with respect to its most important properties. Appropriate vybrali not only lead to the creation of stable carpet tiles 11, which, moreover, very much suitable for re-use when a significant reduction in waste disposal or incineration already achieved, but they also lead to a significant reduction in the weight of the tile as such, while the amount of waste is reduced even more. You can, of course, to imagine other combinations of materials and thicknesses of the layers through which the result is a stable, easily handled and light tiles.

The weight of the second layer 12 through the use of the above materials may, for example, be of the order of 300 g per square meter, while the bonding layer 13 may have a specific weight, for example, about 900 grams per square meter. Through this second layer 12 and the bonding layer 13 in this sample, together represent 35 - 70% of the total weight of the tile, as the typical upper layer 14, which may have a thickness of several millimeters, will have a specific weight of about 500 to 1000 grams per square meter (in the sample is approximately 1100 grams per square meter for threads 16 and about 100 grams per square meter for the first layer basics 15). The weight of carpet tiles 11 thus, in General, is about 2.4 kg per square meter, and therefore, CA is the Rial for the second layer 12 and/or the binder layer 13 is less than 200 g per square meter of the original material remains for disposal after use and burning.

Since the material of carpet tiles 11 are relatively flexible and lightweight, it is easy to collapse. This makes it possible for the reeling up of the coating on shirokolaka shafts and supply it as directcanada carpet or carpet tile, whereby relatively little used part of the floor in the room can santilata hyrocodone carpet, while in the more intensively used areas, such as in the passage, can be laid carpet tiles of the same material, which after some time can easily be replaced. Thus, we achieve significant cost savings on carpet, while the amount of waste is thus also reduced.

The method of production in which the carpet is made in these two forms, schematically depicted in Fig.5. Here separately prepared second layer 12 and top layer 14, is wound respectively on shafts 17 and 18 are pressed together between two squeeze rollers 19 after the binder 13 was pre-printed on the top layer 14 from the reservoir 20 to the outlet 21. Carpet 22 received between squeeze rollers 19, sometimes after heating or su shall be on carpet tiles 11. The manufacturer can thus supply is made simple and inexpensive way two well-matched to each other type of product, i.e. directkey carpet and it sliced identical to carpet tiles.

The following are examples of specific structures of the fibrous structure of the second layer basis:

1.1

Weight: 300 g/m2< / BR>
Material: 100% polypropylene (DSC curve of Fig.6)

The mixture of fibers: 5/11/15 dtex, 60/70/80/90 mm

Heat treatment: calendering with the backside in the temperature range 150 - 190oC

1.2.

Weight: 300 g/m2< / BR>
Material: 70% polypropylene (DSC curve of Fig.6) and 30% polyethylene (DSC curve of Fig.7)

The mixture of fibers:

Polypropylene 5/11/15 dtex, 60 - 100 mm

Polyethylene 7 - 20 dtex, 60 - 100 mm

Heat treatment:

a) Blowing the hot air in the temperature range 130 - 150oC

b) Calendering the back side in the temperature range of 140 - 180oC

1.3

Weight: 600 g/m2< / BR>
Material: 70% polyester (normal polyester (PET), the DSC curve of Fig.8) and 30% of copolyester (DSC curve of Fig.9)

The mixture of fibers:

Polyester 7/15 dtex, 60 - 80 mm

Copolyester of 6.7 dtex, 60 - 80 mm

Thermal treatment

a) air blast 260oC

1.4

Weight: 600 g/m2< / BR>
Material: 70% nylon 6 and 20% of copolyamide (DSC curve of Fig.10)

The mixture of fibers:

Polyamide 6 5/11/15 dtex, 60/80 mm

Copolyamide 4, 2/11 dtex, 50/80 mm

Heat treatment: infrared radiation in the temperature range 120 - 220oC

The following are examples of relevant samples of floor covering according to the invention:

2.1 (loopy pile size 5/32)

The material of the pile: 100% polypropylene, untwisted yarn, 650 g/m2< / BR>
The first layer of Foundation: 100% polypropylene, woven, 120 g/m2< / BR>
Adhesive layer: 100% polyethylene hot-melt adhesive (supplied by Huls AG, Germany, or Dow Chemical, USA) 400 g/m2< / BR>
The second layer bases: as in example 1.1, the weight may, however, be greater than, for example, 450 g/m2< / BR>
Total weight: 1620 g/m2, see Fig.1

The level of destruction: the material can be recycled by melting.

2.2 (sheared pile size 1/8)

The material of the pile: 100% polyester spun yarn, 800 g/m2< / BR>
The first layer of Foundation: 100% polyester, woven, 120 g/m2< / BR>
Adhesive layer: 100% copolyesters the hot-melt adhesive (supplied by Ems Chemie, Domat-Ems, Switzerland, under the trade mark Criltex 11) 400 g/m2< / BR>
Second layer: 100% polyester, 500 g/m
2.3 (sheared pile size 1/10)

The material of the pile: 100% polyamide fiber, untwisted yarn, 1100 g/m2< / BR>
First layer: 100% polyamide, woven, 140 g/m2< / BR>
Adhesive layer: adhesive mass based copolyamide (supplied by Ems Chemi, Domat-Ems, Switzerland, under the trade mark Criltex 8) 250 g/m2< / BR>
Second layer: 100% polyamide, 600 g/m2or as in the example 1,4

Total weight: 2090 g/m2, see Fig.1

The level of destruction: partial removing of material by melting and chemical processing

2.4 (loopy pile size 1/4)

The material of the pile: 100% polyamide fiber, untwisted yarn, 1000 g/m2< / BR>
The first layer of Foundation: 100% polypropylene, woven, 120 g/m2< / BR>
Adhesive layer: modified preliminary floor 800 g/m2and modified binder 480 g/m2based copolymer carboxylating acrylate styrene with polyethylene filler (supplied by Dow Benelux, Tessenderlo, Belgium)

The second layer bases: as in example 1.1

Total weight: 2700 g/m2, see Fig.1

The level of destruction: the production of energy by burning

2.5 (sheared pile size 1/10)

The material of the pile: 100% wool, 1100 g/m2< / BR>
The first is the eve ENT 750 g/m2and modified binder 450 g/m2based carboxylating copolymer of butadiene and styrene with polyethylene filler (supplied by Dow Benelux, Tessenderlo, Belgium)

The second layer bases: as in example 1.1

Total weight: 2720 g/m2, see Fig.1

The level of destruction: the production of energy by burning

2.6 (sheared pile size 1/8)

The material of the pile: 100% polyamide fiber, untwisted yarn, 1100 g/m2< / BR>
The first layer of Foundation: 100% polyester, bonded yarn, 120 g/m2< / BR>
The adhesive layer 1: modified pre-coating 450 g/m2based carboxylating copolymer of acrylate styrene ( available from Dow Benelux, Tessenderlo, Belgium)

The adhesive layer 2: 100% polypropylene hot melt 200 g/m2(comes Huls/Dow)

The second layer bases: as in example 1.1, mass, however, may be greater than, for example, 600 g/m2, 450 g/m2< / BR>
Total weight: 2320 g/m2< / BR>
2.7 (loopy pile size 5/32)

The material of the pile: 100% polypropylene fiber, untwisted yarn, 600 g/m2< / BR>
The first layer of Foundation: 100% polypropylene, woven, 120 g/m2< / BR>
The adhesive layer 1: modified prior coverage on the basis of carboxilic the/m2< / BR>
The adhesive layer 2: hot, 100% polyethylene 200 g/m2(comes Huls/Dow)

The second layer bases: as in example 1.1, mass, however, may be greater than, for example, 450 g/m2300 g/m2< / BR>
Total weight: 1600 g/m2< / BR>
2.8 (sheared pile size 1/10)

The material of the pile: 100% polyamide, woven yarn, 800 g/m2< / BR>
The first layer of Foundation: 100% polyester, bonded twisted yarn, 120 g/m2< / BR>
The adhesive layer 1: modified prior coverage on the basis of carboxylating copolymer of acrylate styrene filler polyethylene and 300 parts of aluminum hydroxide (supplied by Dow Benelux, Tessenderlo, Belgium), 600 g/m2< / BR>
The adhesive layer 2: hot, 10% polyethylene (comes Huls/Dow) 200 g/m2< / BR>
The second layer bases: as in example 1.1, mass, however, may be lower, for example, 45 g/m2, 600 g/m2< / BR>
Total weight: 2320 g/m2< / BR>
2.9 (cross-cut pile size 1/8)

The material of the pile: 100% polyamide fiber, untwisted yarn, 1000 g/m2< / BR>
The first layer of Foundation: 100% polyester, bonded twisted yarn, 120 g/m2< / BR>
The adhesive layer 1: modified prior coverage on the basis of carboxylating acrylate copolymer of styrene, n is UP>< / BR>
The adhesive layer 2: powder adhesive, 100% polyethylene (comes Huls/Dow) 200 g/m2< / BR>
The second layer bases: as in example 1.1, mass, however, may be lower, for example, 300 g/m2, 450 g/m2< / BR>
Total weight: 2370 g/m2< / BR>
As mentioned earlier, the fibrous structure may with advantage be made of a combination of two different types of materials, when the core of the individual fibers consists of one type of material, and the surface consists of another type of material (bicomponent fiber). For example, can be used fibers with a polypropylene core and a polyethylene surface. The DSC curve for a typical fiber of this type is shown in Fig.6. You can also use the fiber polyester with polyester core with a melting point of about 256oC and polyester surface with a melting point of about 225oC, the DSC curve for a typical fiber of this type is shown in Fig.7, or with another polyester composition with a melting point of, for example, 140oC.

The Danish Technological Institute was completed with the analysis of samples samples of floor covering according to examples 2.1-2.9 and comparison with traditional bituminous tiles according to ISO 34551/1-1981(E), aims the table A. (see end of description). Possible changes in the specific performance of the floor covering in the framework of the idea of the present invention. Thus, many different combinations of materials may be used in the composite layers of flooring up until the second layer of the framework consists of needling the fibrous structure of thermoplastic polymer-containing fibers, bonded together by heating, and while the adhesive layer consists of a polymer-containing binder, which is activated by heat.

1. Flooring with low elongation and high dimensional stability, comprising the first layer of the base (3) with attached pile material (2) and the underlying second layer bases (5) attached to the back side of this first layer of the base (3) by means of an intermediate adhesive layer (4), characterized in that the second layer of the framework contains needle-punched fibrous structure of thermoplastic, polymer-containing continuous fibers or strands of fibers, bonded together by heating to a temperature at least corresponding to the minimum softening temperature for the materials of the fibers of the fibrous structure, and the specified adhesive layer SOS is the temperature of the reaction below the melting temperature of the materials mostly fibers, contained in the fibrous structure.

2. The floor under item 1, characterized in that the content of thermoplastic polymer-containing fibrous material is at least 25% of the fibrous structure in the second layer bases (5).

3. The floor under item 1, characterized in that thermoplastic polymer-containing fiber materials selected from the group consisting of polypropylene, polyester, polyamide, polyethylene, copolymers and combinations thereof.

4. The floor under item 1, characterized in that thermoplastic polymer-containing fibrous materials include at least two types of materials with different softening temperatures, and the difference between the softening temperature is at least 10oC.

5. The floor under item 1, wherein the fibrous structure includes fibers formed by combining two different types of fibrous materials (bicomponent fiber), and the core of the individual fibers made from one type of fibrous material, and the surface of these fibers are made from a different type of fibrous material.

6. The floor under item 1, characterized in that the binder adhesive layer is 7. The floor under item 6, characterized in that the binder is chemically active and is composed of polymers and/or copolymers of butadiene, polystyrene, polyacrylate, polystyrene acrylate, polyvinyl acetate or butadiene nitrile.

8. The floor under item 7, characterized in that the reactive binder includes a thermoplastic filler.

9. The floor under item 6, characterized in that the binder is thermoplastic and includes thermoplastics, which in the production process are dispersed in the suspension to form a paste.

10. The floor under item 1, characterized in that the binder is thermoplastic and is applied in powder form during the preparatory works or at the time of manufacture is heated to liquefaction (hotmelt).

11. The floor in one of the paragraphs.8-10, characterized in that thermoplastic resins include polymers and/or copolymers of polyolefin, or polyester, or polyamide.

12. The floor under item 1, characterized in that the second layer bases (5) has a specific gravity of 70-1000 g/m

13. Carpet tile comprising a second layer of base, binder and top layer comprising the first layer of the base, characterized in that Magnitka on p. 13, characterized in that the specified material, recyclable, is a polymer.

15. Tile under item 13 or 14, characterized in that the specified material, recyclable, it is waterproof.

16. Tile in one of the paragraphs.13-15, characterized in that the second layer of the framework contains polypropylene and polyethylene binder layer.

17. Tile in one of the paragraphs.13-16, wherein the top layer includes the first layer of the substrate and the filament, which he is bound, with the first layer of the substrate and the second layer bases are formed by sheets of non-woven material.

18. Tile under item 17, characterized in that the first layer of the framework contains polyester.

19. Tile in one of the paragraphs.13-18, characterized in that the second layer of the substrate and bonding layer are together the weight of 1,800 g/m

20. A method of making floor coverings with low elongation and high dimensional stability, including the formation of a cloth material - semi-finished product by attaching the NAP of the material (2) to the first layer of the base (3) and connecting the back side of the canvas material - semi-finished product (2, 3) with the fabric of the second layer bases (5) by prokleivanija adhesive layer (4), characterized in that Politeama continuous or chopped fibers, is heated to a temperature which at least corresponds to the lowest softening temperature fibrous materials fibrous structure of the second layer of the substrate, and an adhesive layer formed from an organic polymer-containing binder, a reaction which activate by heating to a temperature lower than the melting point of most contained in the fibrous structure of the second layer bases fibrous materials.

21. The method according to p. 20, characterized in that the material of the second layer bases (5) is heated under calendering at a temperature lying mainly in the range from 110 to 260oC.

22. The method according to p. 20, characterized in that the material of the second layer bases (5) is heated by blowing through it hot air to a temperature lying mainly in the range of 110 to 260oC.

23. The method of manufacturing according to p. 20, characterized in that the material of the second layer bases (5) is heated by infrared radiation to a temperature lying mainly in the range of 110 to 260oC.

24. The method according to p. 20, characterized in that prokeivanie binder comprises applying a binder on the back side of the sheet mater is on p. 20, characterized in that it includes cutting the final pieces of the covering (1) at least in the direction transverse translational, for forming pieces of flooring desired size, for example, for use as carpet tiles.

26. The method of manufacturing carpet by forming the upper layer containing the first layer bases, formation of the second layer of the substrate and the connection of the upper layer and the second layer of the framework by imposing a binder, characterized in that the stiffness and the material of the second layer of the substrate and the material of the binder layer are chosen so that formed in this way, the carpet has sufficient rigidity for use as carpet tiles and relatively low weight, and after the formation of the carpet is wound on the so-called shirokolaka shafts and partially cut into carpet tiles.

27. The method of placement of a covering or tiles on a black floor with substances that increase the viscosity, characterized in that the coating is performed on one of the PP.1-12, and tile-in one of the paragraphs.13-19.

Priority points:

02.11.93 - PP.1-12 and 19-25;

01.09.93 - PP.13-18 and 26; the application NL 9301511;

14.12.93 - p. 27.

 

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To clean the floor // 2131185

The invention relates to soft floor coverings or walls, in particular to a decorative pile coatings and method of their manufacture

The invention relates to the molding of polytrimethylene in the thread, suitable for carpets

The invention relates to household goods, in particular to coatings for floors

FIELD: equipment used for attachment of fastening sheets to one another and to floor.

SUBSTANCE: blind floor designed for forming of surface for laying of detachable decorative floor covering has plurality of fastening sheets, each comprising first upper surface substantially covered with detachable attachment means, plurality of fastening sheets arranged so as to substantially cover floor for forming of blind floor with upper surface. Blind floor has plurality of passages defined completely or partly in at least one sheet and oriented from blind floor upper surface to floor, passages having part made flush with blind floor upper surface and defining first supporting surface arranged lower than blind floor surface, plurality of fastening devices, each comprising second upper surface substantially covered with devices for detachable attachment means. Blind floor has plurality of fastening devices shaped to conform to passages for introducing into passages. Fastening devices have wider upper part for defining second supporting surface, plurality of fastening parts for insertion into passages so that second supporting surface faces first supporting surface, and at least several fastening devices attached to floor. Various versions of fastening sheets, assembly methods and construction of fastening devices are described. Fastening devices, which may be inserted into fastening sheet portion of reduced thickness are preferably used, said portion surrounding slot in fastening sheet.

EFFECT: increased efficiency by providing laying of fastening sheets for loose movement with respect to one another and, as a result, free expansion and shrinkage of modular sheets.

39 cl, 7 dwg

FIELD: equipment used for attachment of fastening sheets to one another and to floor.

SUBSTANCE: blind floor designed for forming of surface for laying of detachable decorative floor covering has plurality of fastening sheets, each comprising first upper surface substantially covered with detachable attachment means, plurality of fastening sheets arranged so as to substantially cover floor for forming of blind floor with upper surface. Blind floor has plurality of passages defined completely or partly in at least one sheet and oriented from blind floor upper surface to floor, passages having part made flush with blind floor upper surface and defining first supporting surface arranged lower than blind floor surface, plurality of fastening devices, each comprising second upper surface substantially covered with devices for detachable attachment means. Blind floor has plurality of fastening devices shaped to conform to passages for introducing into passages. Fastening devices have wider upper part for defining second supporting surface, plurality of fastening parts for insertion into passages so that second supporting surface faces first supporting surface, and at least several fastening devices attached to floor. Various versions of fastening sheets, assembly methods and construction of fastening devices are described. Fastening devices, which may be inserted into fastening sheet portion of reduced thickness are preferably used, said portion surrounding slot in fastening sheet.

EFFECT: increased efficiency by providing laying of fastening sheets for loose movement with respect to one another and, as a result, free expansion and shrinkage of modular sheets.

39 cl, 7 dwg

FIELD: floor coating production.

SUBSTANCE: fastening sheet, carpet and lining assembly for laying carpet on floor includes fastening sheet having upper layer of thin flexible rigid material and lower layer of elastic resilient substrate arranged along periphery of area to be covered and defining above area. The assembly comprises contact band with hooks connected to the sheet along perimeter thereof and elastic lining with height corresponding to that of fastening sheet. Fastening sheet dimensions correspond to area defined by the sheet. The assembly also includes carpet with backing surface covered with loops to provide detachable carpet connection to the band having hooks. The carpet is located above fastening sheet and lining. Modular frame for carpet, process of fastening sheet and decorative coating assembling, fastening sheet and unfinished floor structure for base substrate covering are also disclosed. Method of modular frame laying involves laying frame of predetermined size on surface to be covered, laying coating modules mating each other along frame perimeter, removing frame and laying decorative coating on area from which frame was removed. Sheet may be cut and laid within a room. Sheet has rigidity and mass enough to maintain its shape without bends and buckling formation after carpet laying on floor by freely floating method without connection to floor.

EFFECT: improved ability to floor coating arrangement and replacement.

29 cl, 15 dwg

FIELD: floor coating production.

SUBSTANCE: fastening sheet, carpet and lining assembly for laying carpet on floor includes fastening sheet having upper layer of thin flexible rigid material and lower layer of elastic resilient substrate arranged along periphery of area to be covered and defining above area. The assembly comprises contact band with hooks connected to the sheet along perimeter thereof and elastic lining with height corresponding to that of fastening sheet. Fastening sheet dimensions correspond to area defined by the sheet. The assembly also includes carpet with backing surface covered with loops to provide detachable carpet connection to the band having hooks. The carpet is located above fastening sheet and lining. Modular frame for carpet, process of fastening sheet and decorative coating assembling, fastening sheet and unfinished floor structure for base substrate covering are also disclosed. Method of modular frame laying involves laying frame of predetermined size on surface to be covered, laying coating modules mating each other along frame perimeter, removing frame and laying decorative coating on area from which frame was removed. Sheet may be cut and laid within a room. Sheet has rigidity and mass enough to maintain its shape without bends and buckling formation after carpet laying on floor by freely floating method without connection to floor.

EFFECT: improved ability to floor coating arrangement and replacement.

29 cl, 15 dwg

FIELD: carpet securing facilities.

SUBSTANCE: apparatus has continuous layer of foamed material including continuous lower layer of foamed material with non-sliding and non-adhesive lower surface contacting directly with floor surface, and continuous upper layer of foamed material with upper surface for contacting with lower side of covering. Apparatus is further provided with continuous thin woven layer intermediate lower layer of foamed material and upper layer of foamed material, and adhesive layer on upper surface of layer of foamed material. Adhesive layer may be layer of acrylic adhesive. According to second version, adhesive layer may be pressure-sensitive adhesive layer. According to third version, apparatus has layer of detachable paper coated with silicone, said paper layer covering said adhesive layer. Method involves providing carpet holding apparatus consisting of non-sliding and non-adhesive separate non-bound and continuous sheet with upper surface adapted for engagement with carpet lower side, and lower side adapted for preventing carpet from displacement relative to floor surface without utilization of adhesive; applying adhesive means onto upper surface of said sheet; placing said sheet between carpet and floor surface so that said adhesive means cooperates with carpet and said lower surface of said sheet cooperates with floor for preventing carpet from displacement relative to floor.

EFFECT: simplified method for operation of repositionable carpet holding apparatus, reduced production costs and increased efficiency in preventing carpet from sliding relative to floor.

6 cl, 5 dwg

Mat (versions) // 2295906

FIELD: sanitary and hygienic facilities for dwelling, equipment for sportive and sanitation complexes, household articles such as things for bathrooms, or floor mat-like articles for swimming pools.

SUBSTANCE: mat has at least two modules formed as sheets of cellular structure connected with one another through retaining members positioned in openings provided on at least one outer side of each sheet. Sheets and retaining members are made from resilient plastic polymer and retaining members are formed as webs made from tape or strip. Width of web exceeds diameter of opening. Web has two-beveled wedge-shaped ends and thinned portion provided at the side of base of each wedge-shaped end for arranging thereof in cell opening and providing adhering of base and web to cell. According to another version, mat has at least two modules formed as sheets consisting of cells connected with one another by ribs, and retaining members positioned within openings provided on at least one outer side of each sheet free of ribs. Sheets and retaining members are made from resilient plastic polymer. Retaining members are formed as webs of tape or strip having width exceeding diameter of opening, with tips formed as equilateral trapezium and thinned regions provided at the side of larger base of each tip being adapted for locating it in cell opening and for providing adherence of base and web to tip. Length of web positioned between thinned portions corresponds to length of ribs. Mats may be of any sizes.

EFFECT: light-weight and simplified construction, convenient usage, and reduced labor intensity for manufacture and retention of pattern structure.

9 cl, 5 dwg

FIELD: personal demand items.

SUBSTANCE: intended for use in production of carpets. Polyurethane bases of carpet coatings are produced with application of polyurethane-forming composition, where polyurethane is a product of interaction of polyisocyanate component and polyol component, containing mixture of isocyanate reaction materials, from which one or more of unnecessarily alkoxylated hydroxymethyl-containing (polyester) polyols make 25-90 wt %.

EFFECT: formula provides for considerable replacement of traditional polyols with polyols produced from yearly renewable energy sources, with preservation of important properties, like edge curling, strength of bundle fixation, viscosity and proper hardening rates.

40 cl, 4 tbl, 2 ex

FIELD: construction.

SUBSTANCE: intended for application in manufacturing of floorings. Connecting unit comprises part of one flooring element provided with hole and pin of the other attached element arranged in this hole with facilities of fixation in the form of long tabs that surround through axial channel of rod and are bent till contact with side surface of hole by central spacer rod. Rod is inserted into channel between tabs on side opposite to their ends. Mat comprises upper and lower surfaces with upper and lower shelves arranged along edges with thickness that is less than mat thickness. Upper shelves are equipped with vertical pins that protrude downwards, and lower shelves comprises holes for the possibility of coupling with similar pins of another mat in process of flooring assembly by superposition of upper shelves of one mat over lower shelves of the other one. Pin comprises axial channel with flexible longitudinal tabs arranged along periphery. Free end part of pin produced by tabs in cross dimension is less than according section of hole, with the possibility to open as rod element is inserted into channel, which exceeds its cross dimension. Channel is equipped with through expanded section in upper shelf.

EFFECT: improved operational characteristics of detachable flooring.

15 cl, 10 dwg

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