KR20220088531A - Adhesive Tile and Method for Preparing Same - Google Patents

Abstract

The present invention relates to an adhesive tile and a method for manufacturing the same, and the adhesive tile of the present invention includes: a foam sheet including a reinforcing film; a polypropylene-based foam board laminated on the foam sheet; And by including a polypropylene-based decoration sheet laminated on the polypropylene-based foam board, deformation due to temperature change is small, and since each layer is made of a similar material, the difference in the shrinkage and expansion rate of each layer is small, so that the temperature change and long-term storage The curling phenomenon can be suppressed and the tile can be made of eco-friendly materials because plasticizers, which are harmful substances, are not used. In addition, according to the manufacturing method of the present invention, since the lamination between polypropylene-based members can be thermally laminated without a separate adhesive, the adhesive tile can be manufactured with a simple process, and the problem of tile deformation due to curing of the adhesive can be solved. can

Description

Adhesive Tile and Method for Preparing Same

The present invention relates to a pressure-sensitive adhesive tile and a method for manufacturing the same, and more particularly, to a polypropylene-based adhesive formed of an eco-friendly material that has little deformation due to temperature change and a small difference in shrinkage and expansion rate of each layer, which can suppress curling. It relates to a tile and a method for manufacturing the same in a simple process.

Various building finishing materials are used to finish and decorate interior and exterior walls and floors of buildings. In the past, there was a burden that the construction process was complicated and the cost was high because professional manpower, tools and adhesives for construction were required when constructing such a building finishing material.

In order to solve this inconvenience, DIY (do it yourself) products that consumers can directly install have appeared. Among them, there is a growing demand for decorative tile-type finishing materials that have various colors, patterns, or textures and can be easily installed. is increasing

For example, Korean Patent Laid-Open Publication No. 10-2018-0092044 discloses a decoration including a release paper, an adhesive layer, a foam layer, a PE film layer, and a printed layer having a PVC film formed on the surface as a finishing material for increasing the aesthetics of an indoor wall surface. It describes an adhesive block, and in Korean Patent Laid-Open No. 10-2018-0107950, a compressed plastic panel and a decorative sheet are used as an adhesive wall covering material including a release paper, an adhesive side, a foam sheet, a PVC-based compressed plastic panel, and a decoration sheet. Disclosed is an adhesive wall covering material laminated with an adhesive member. As such, the pressure-sensitive adhesive tile generally has a structure including a release film, an adhesive layer, a foam sheet, and a decorative sheet, in which each sheet is laminated through an adhesive member.

As a main material of the adhesive tile, a polymer resin, among others, polyvinylchloride (PVC) is mainly used. PVC resin has advantages of low price and excellent chemical resistance, but due to its low processability, a phthalate-based plasticizer is essential in the manufacturing process. However, these phthalate-based plasticizers cause environmental hormones and have a problem of generating harmful substances such as dioxins during incineration, so their use is regulated.

As a technology for solving this problem, Korean Patent Laid-Open Publication No. 10-2018-0027222 discloses an eco-friendly plasticizer manufactured using citric acid and alcohol, and an interior sheet including a PVC foam layer formed using the same. However, these alternative plasticizers are in a situation in which supply and demand and stability are not secured.

Moreover, when PVC is used to produce a multi-layered tile, a curling phenomenon occurs in which the product is bent due to the low heat resistance of PVC. In particular, when the members used for each layer of the tile are produced at different production LOTs, various temperature stresses occur during delivery or storage after production, resulting in a large error according to the production LOT. Therefore, the defect rate of the product increases, and when it is attached to a wall or floor, the adhesive does not properly adhere to the adherend, causing a problem in that it falls off.

In addition, since a separate adhesive must be used for bonding each member due to the nature of PVC, which is weak to heat, an overlay process of applying and drying an adhesive to form an adhesive layer and then pressing it to another member is required, as well as a process of curing the adhesive shrinkage occurs, and environmental pollution occurs due to the use of adhesives.

Accordingly, it is necessary to develop a building finishing material that can be manufactured by a simple process as an eco-friendly tile-type building finishing material with little deformation due to temperature change.

An object of the present invention is to provide a pressure-sensitive adhesive tile formed of an eco-friendly material that can suppress the curling phenomenon due to less deformation due to temperature change and a small difference in the shrinkage and expansion rate of each layer.

Another object of the present invention relates to a method for manufacturing the pressure-sensitive adhesive tile in a simple process.

In order to achieve the above object, the present invention is a foam sheet; a polypropylene-based foam board laminated on the foam sheet; And as an adhesive tile comprising a polypropylene-based decorative sheet laminated on the polypropylene-based foam board, the foam sheet is a release film; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; And it provides an adhesive tile comprising an adhesive layer laminated on the foam.

In the present invention, the reinforcing film is a polypropylene-based coating layer; and a polyethylene-based core layer laminated on the polypropylene-based coating layer.

In the present invention, the polypropylene-based coating layer and the polyethylene-based core layer may be laminated in a thickness ratio of 10:90 to 50:50.

In the present invention, the thickness of the reinforcing film may be 0.01 to 5 mm.

In the present invention, the foam may be laminated to a thickness of 1 to 5mm.

In the present invention, between the foam sheet and the foam board, a polypropylene-based balance sheet may be further included.

In the present invention, the thickness of the polypropylene-based balance sheet may be 0.01 to 0.5mm.

The present invention also comprises the steps of forming a laminate by thermally laminating a polypropylene-based decorative sheet and a polypropylene-based foam board at 150 to 200 °C; and a release film on the polypropylene-based foam board of the laminate; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; And it provides a method for producing a pressure-sensitive adhesive tile comprising the step of adhering the adhesive layer of the foam sheet comprising an adhesive layer laminated on the foam.

The present invention also comprises the steps of forming a laminate by thermal lamination at 150 to 200 °C of polypropylene-based decorative sheet and polypropylene-based foam; thermally laminating a polypropylene-based balance sheet at 150 to 200° C. on the polypropylene-based foam board of the laminate; and a release film on the polypropylene-based balance sheet; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; And it provides a method for producing a pressure-sensitive adhesive tile comprising the step of adhering the adhesive layer of the foam sheet comprising an adhesive layer laminated on the foam.

The present invention also comprises the steps of forming a laminate by thermal lamination of a polypropylene-based foam board and a polypropylene-based balance sheet at 150 to 200 °C; Thermal laminating a polypropylene-based decorative sheet at 150 to 200° C. on the polypropylene-based foam board of the laminate; and a release film on the polypropylene-based balance sheet; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; And it provides a method for producing a pressure-sensitive adhesive tile comprising the step of adhering the adhesive layer of the foam sheet comprising an adhesive layer laminated on the foam.

The adhesive tile of the present invention applies polypropylene resin to the decorative sheet and foam board and provides a reinforcing film to the foam sheet, so there is little deformation due to temperature change, and since each layer is made of a similar material, the difference in shrinkage and expansion rate of each layer is small, it is possible to suppress the curling phenomenon caused by temperature change and long-term storage. In addition, since a plasticizer, which is a harmful substance, is not used, the tile can be made of an eco-friendly material.

In addition, according to the manufacturing method of the adhesive tile of the present invention, in lamination between polypropylene-based members, it can be laminated by heat without a separate adhesive. Therefore, it is possible to manufacture a tile with a simple process, and it is possible to solve the problem of deformation of the tile due to curing of the adhesive.

1 is a conceptual diagram of an adhesive tile according to an embodiment of the present invention.
2 is a conceptual diagram of an adhesive tile including a balance sheet according to an embodiment of the present invention.
3 is a view showing a conceptual diagram of a process of a method for manufacturing a pressure-sensitive adhesive tile according to an embodiment of the present invention.
4 is a view showing a conceptual diagram of a process of a method for manufacturing an adhesive tile including a balance sheet according to an embodiment of the present invention.
5 is a view showing a conceptual diagram of a process of a method for manufacturing an adhesive tile including a balance sheet according to another embodiment of the present invention.
6 is a graph showing the results of measuring the amount of curl according to the temperature of the adhesive tile according to an embodiment of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is those well known and commonly used in the art.

The present invention is a polypropylene-based foam sheet; polypropylene-based foam board; And it relates to an adhesive tile comprising a polypropylene-based decorative sheet.

The adhesive tile of the present invention has little deformation due to heat by applying polypropylene resin instead of polyvinyl chloride resin used as the main material of conventional tiles to decorative sheets and foam boards, and even if the product is slightly deformed by heat, the temperature returns to room temperature When it comes, it shows the characteristics to be restored to the original state, thereby reducing the defect rate of the finished product. In addition, since harmful substances such as plasticizers are not used in the polypropylene resin, an eco-friendly tile can be provided.

Furthermore, since the adhesive tile of the present invention does not include an adhesive layer for laminating between the polypropylene-based members, it is possible to prevent the tile from being deformed or excessively thick due to the adhesive layer.

In addition, in the adhesive tile of the present invention, since each layer is made of a similar material, it is possible to minimize the curling phenomenon due to the difference in the shrinkage and expansion rates of each layer. In addition, even if the members of each layer are produced in different production LOTs, there is little concern about instability due to production LOT.

In addition, since the pressure-sensitive adhesive tile of the present invention has a reinforcing film on the foam sheet, it is possible to minimize the difference in tension applied up and down by easily compensating for the difference in shrinkage and expansion rates between the foam and the release film, so that excellent durability and dimensional stability are achieved. can indicate

In the present specification, the polypropylene (polypropylene, PP) resin refers to a synthetic resin in which the content of propylene in the basic polymer is 50% or more. The polypropylene resin may be appropriately selected according to the physical properties required for each layer, and for example, homo polypropylene, block polypropylene, random polypropylene, and other polypropylene-based copolymers may be used. A material composed of a material including such a polypropylene resin may be referred to as a 'polypropylene-based'.

In the present specification, a polyethylene (PE) resin refers to a synthetic resin having an ethylene content of 50% or more in a basic polymer. The polyethylene resin may be appropriately selected according to the physical properties required for each layer, and for example, low-density polyethylene (LDPE), high-density polyethylene (HDPE), ethylene-based copolymer, and the like may be used. Those composed of a material including such a polyethylene resin may be referred to as 'polyethylene-based'.

In the present specification, a polyethylene terephthalate (PET) resin is a kind of saturated polyester resin, and may be obtained by a condensation reaction of terephthalic acid and ethylene glycol. A material composed of a material including such a polyethylene terephthalate resin may be referred to as a 'polyethylene terephthalate-based'.

The adhesive tile of the present invention is a foam sheet; a polypropylene-based foam board laminated on the foam sheet; And it includes a polypropylene-based decorative sheet laminated on the polypropylene-based foam board.

In the present invention, the foam sheet is a release film; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; and an adhesive layer laminated on the foam.

1 is a conceptual diagram of an adhesive tile according to an embodiment of the present invention. As shown in FIG. 1 , in the adhesive tile of the present invention, a foam sheet 100 , a foam board 200 and a deco sheet 300 are sequentially stacked, and the foam sheet 100 is a release film 110 . , the adhesive layer 120 , the reinforcing film 130 , the foam 140 , and the adhesive layer 150 are sequentially stacked.

In a preferred embodiment of the present invention, the reinforcing film 130 may include a polypropylene-based coating layer 131 and a polyethylene-based core layer 132 laminated on the polypropylene-based coating layer 131 .

Hereinafter, each component of the adhesive tile according to the present invention will be described in detail.

In the present invention, the decorative sheet serves to impart various appearance and design effects to the tile, and may include polypropylene resin. Specifically, the decoration sheet may be a decoration layer having various colors, patterns or textures formed on a base layer comprising a polypropylene resin.

The thickness of the decorative sheet may be 0.1 to 0.3mm, preferably 0.15mm to 0.2mm. If the thickness of the decoration sheet is too thin, it is difficult to form a pattern or texture on the decoration layer, and if it is too thick, the price competitiveness of the tile may decrease.

In the present invention, the decorative sheet is configured to be laminated with a foam board.

The foam board is made of a foam material to absorb impact, to lighten the product and to facilitate cutting, and may be formed using a foam composition including a polypropylene resin.

The polypropylene foaming composition may include a polypropylene resin and a foaming agent.

The foaming agent is a component for forming a porous foam by mixing with the polypropylene resin, and includes inorganic foaming agents such as ammonium hydrogen carbonate, sodium hydrogen carbonate, and sodium borohydride; Azodicarbonamide (ADCA), p,p'-oxybis(benzenesulfonyl hydrazide) (p,p'-oxybis(benzenesulfonyl hydrazide), OBSH), p-toluenesulfonyl hydrazide (p -toluenesulfonyl hydrazide), benzenesulfonyl hydrazide, or an organic foaming agent such as dinitroso pentamethylene tetramine (DPT) may be used.

In addition, the polypropylene foaming composition may further include additives such as foaming aids, UV stabilizers, antioxidants, lubricants, processing aids, impact modifiers, pigments, fillers, and heat stabilizers within the range that does not impair the effects of the present invention. have.

The foaming aid is a component for controlling the foamability and processability of the polypropylene resin, and may include a cadmium compound, a calcium compound, a zinc compound, a magnesium compound, an iron compound, and a copper compound, for example, p-toluene zinc sulfate ( p-toluene zinc sulfate) may be used.

The UV stabilizer is a component that protects the polypropylene resin from UV rays, such as a hydroxybenzophenone-based compound, a benzotriazole-based compound, and a hindered amine light stabilizer (HALS). UV stabilizers and the like may be used.

The antioxidant is a component that inhibits the oxidation of polypropylene resin, double chain inhibitors such as phenolic and amine antioxidants; A peroxide decomposing agent such as a sulfur-based or phosphorus-based antioxidant may be used.

The lubricant is a component for improving the processability and interfacial properties of the polypropylene resin, and includes fatty acid amides such as stearic acid amide, oleic acid amide, and erucic acid amide; Hydrocarbon lubricants, such as paraffin wax and synthetic polyethylene, etc. can be used.

The processing aid is a component for adjusting the viscosity of the polypropylene resin, and methyl methacrylate may be used.

The impact modifier is a component added to increase the mechanical strength of the polypropylene resin, and acrylonitrile/butadiene/styrene copolymer may be used.

The pigment serves to impart a color to the foam, and various pigments may be used depending on a desired color. For example, rutile type titanium dioxide (TiO ₂ ), which is a white pigment, may be used to implement white color.

The filler is a component for reinforcing mechanical strength, impact resistance, heat resistance, etc. of the polypropylene resin, talc, calcium carbonate, and the like may be used.

The heat stabilizer is a component that protects the polypropylene resin from heat, and zinc-based heat stabilizers such as zinc oxide (ZnO) and zinc stearate may be used.

The foaming rate of the foam board manufactured using the polypropylene foam composition may be 50 to 200%, preferably 80 to 120%. When the foaming rate is within the above range, dimensional stability and flexibility are excellent, and it may be advantageous in terms of weight reduction and shock absorption of the product. The foaming rate refers to a value (%) obtained by (volume after foaming - volume before foaming)/(volume before foaming)x100.

The thickness of the foam board may be 0.5 to 5 mm, preferably 0.8 to 3 mm, and more preferably 1 to 1.5 mm. Conventionally, since the foam board was formed of a PVC-based material that is weak to heat, it was difficult to produce a thin thickness due to the fear of thermal deformation. do.

The laminate in which the decorative sheet and the foam board are laminated is laminated on the foam sheet.

The foam sheet serves to enable the adhesive tile of the present invention to be adhered to the adherend, and to easily attach and fix the tile to the adherend surface with irregularities such as rough walls.

In the present invention, the foam sheet is a release film; adhesive layer; reinforcing film; It may have a form in which the foam and the adhesive layer are sequentially stacked.

The release film is a pressure-sensitive adhesive release film that protects the pressure-sensitive adhesive layer, and is removed when the tile is attached to an adherend.

The release film may include a polyethylene terephthalate (PET) film, and may be coated with a release agent that imparts release properties, such as a silicone-based release agent or a fluorine-based release agent, on the PET film. In general, a release paper made of paper is used for a tile-type architectural finishing material. In this case, the curling phenomenon occurs severely when the temperature changes due to the difference in the shrinkage and expansion rates of the polymer resins, which are the main materials of the tile, and the release paper. In the present invention, by using a polyethylene terephthalate-based release film having a similar level of shrinkage and expansion as the reinforcing film in the decorative sheet, foam board, and foam sheet as the release film, the tile is deformed due to temperature change during storage and delivery of the product. can be prevented from becoming

The release film may have a thickness of 1 to 50 μm, preferably 5 to 20 μm.

In the present invention, the adhesive layer is exposed when the release film is peeled so that the tile can be attached to an adherend surface such as a wall or floor, and repeated attachment and detachment of the tile is possible due to the tackiness of the adhesive layer.

The component of the adhesive layer is not particularly limited, and may be made of a pressure-sensitive adhesive (PSA) known in the art, for example, an acrylic adhesive, a silicone adhesive, or the like.

The amount of the pressure-sensitive adhesive in the pressure-sensitive adhesive layer can be adjusted depending on the type of pressure-sensitive adhesive, the type of the adherend, or the desired adhesive strength, for example, 30 to 60 g, preferably 40 to 50 g of the pressure-sensitive adhesive per 1 m ² of the area of the adherend. Thus, an adhesive layer can be formed.

In the present invention, the reinforcing film serves to reinforce the strength of the foam to be described later, and to impart durability and dimensional stability to the tile. The reinforcing film may be formed of a polyolefin-based material such as a decorative sheet, a foam board, and a foam foam, and in this case, the difference in the shrinkage and expansion rate between each layer of the tile may be small, so that the curling phenomenon may be suppressed.

The reinforcing film may be configured in the form of two or more layers including a core layer and a coating layer, thereby easily compensating for a difference in shrinkage and expansion rates between the foam on the core layer and the release film on the bottom of the coating layer.

The coating layer is laminated on the adhesive layer, and a core layer is laminated on the coating layer.

In a preferred embodiment of the present invention, the coating layer may include a polypropylene resin, and the core layer preferably includes a polyethylene resin. By composing the reinforcing film with a polypropylene coating layer and a polyethylene core layer laminated on the polypropylene coating layer, it is possible to prevent curling by stabilizing the adhesive tile as a whole.

In the present invention, the polypropylene coating layer and the polyethylene core layer are preferably laminated in a thickness ratio of 10:90 to 50:50, more preferably in a thickness ratio of 20:80 to 40:60, and 25:75 to 35: A thickness ratio of 65 is most preferred. By laminating the polypropylene coating layer and the polyethylene core layer at a thickness ratio within the above range, it is possible to provide the same tension to the upper and lower portions of the reinforcing film, thereby stabilizing the tile as a whole.

The overall thickness of the reinforcing film may be 0.01 to 5 mm, preferably 0.03 to 2 mm, more preferably 0.05 to 1 mm. If the thickness of the reinforcing film is too thin, it is difficult to prevent the curling phenomenon of the tile.

In the present invention, foam may be laminated on the reinforcing film. The foam serves to compensate the unevenness of the adherend surface to which the tile is attached by providing a cushion to the foam sheet, and may be formed using a foam composition including a polyethylene resin. This polyethylene-based foam has high flexibility and excellent cushioning performance, so that tiles can be easily attached to an adherend with irregularities such as a rough wall.

The polyethylene foam composition may include a polyethylene resin and a foaming agent, and within the range that does not impair the effects of the present invention, a foaming aid, a heat stabilizer, a UV stabilizer, an antioxidant, a lubricant, a processing aid, an impact modifier, a pigment, a filler, etc. may further include additives. As the foaming agent and additive, components generally used for foaming polyethylene resins in the art may be used, and it is also possible to use the components disclosed in the polypropylene foaming composition.

The foam may be laminated to a thickness of 1 to 5 mm, preferably 1.5 to 3 mm, and most preferably 2 mm. It is preferable in performing the function of compensating for the unevenness of the adherend in the thickness range. If the thickness is too thin, this function cannot be performed, and if it is too thick, the aesthetics may be impaired.

In the present invention, the adhesive layer serves to bond the foam sheet and the foam board. The component of the adhesive layer is not particularly limited as long as it can adhere a polyolefin-based material, and may be, for example, an acrylic adhesive or a urethane-based adhesive.

The adhesive layer may be formed using 30 to 60 g, preferably 40 to 50 g of adhesive per 1 m ² of the tile area.

In one embodiment of the present invention, the pressure-sensitive adhesive tile may further include a polypropylene-based balance sheet between the foam board and the foam sheet.

2 is a conceptual diagram of an adhesive tile including a balance sheet.

As shown in FIG. 2, the adhesive tile according to an embodiment of the present invention has a form in which the foam sheet 100, the balance sheet 400, the foam board 200 and the deco sheet 300 are sequentially stacked. have

In the present invention, the balance sheet 400 is positioned between the foam board 200 and the foam sheet 100 to structurally stabilize the tile, thereby preventing the curling phenomenon caused by temperature change.

In the present invention, the balance sheet may include a polypropylene resin, thereby maximizing the effect of preventing curling by giving the same level of tension to the top and bottom of the foam board.

The thickness of the balance sheet is preferably 0.01 to 0.5mm, preferably 0.02 to 0.1mm to maximize the curling prevention effect.

The present invention also relates to a method for manufacturing an adhesive tile.

3 is a view showing a conceptual diagram of a process of a method for manufacturing an adhesive tile according to an embodiment of the present invention.

The manufacturing method of the adhesive tile of the present invention comprises the steps of producing a polypropylene-based decorative sheet; producing a polypropylene-based foam board; Laminating the decorative sheet and foam board by heat; producing a foam sheet; And it comprises the step of attaching the foam sheet to the surface opposite to the decorative sheet as one side of the foam board laminated with the decorative sheet.

In the manufacturing method of the present invention, the decorative sheet and the foam board are preferably laminated by thermal lamination. That is, without an overlay process of applying and drying an adhesive to the deco sheet and pressing it, lamination can be performed simply by an in-line process of inserting and laminating a deco sheet at the same time as producing a foam board. In the case of the thermal lamination method, since the adhesive is not used, the problem of the prior art in which a shrinkage phenomenon occurs in the process of curing the adhesive can be solved, and the tile can be manufactured in an environment-friendly manner.

In the step of producing the polypropylene-based deco sheet (hereinafter referred to as 'deco sheet production step'), the deco sheet forms a deco layer having various colors, patterns or textures on the base layer made of the polypropylene resin composition. can be manufactured.

The decoration layer may be formed by printing a pattern on the surface of the base layer through a method such as transfer printing, gravure printing, screen printing, or the like, or by laminating a layer including the pattern on the surface of the base layer. .

Additional descriptions of the role, components, and properties of the decorative sheet are the same as those described above in the description of the adhesive tile, and thus a detailed description will be omitted to avoid overlapping descriptions.

In the step of producing the polypropylene-based foam board (hereinafter, referred to as 'foam board production step'), the foam board may be manufactured by foaming the polypropylene foam composition.

Foaming of the polypropylene foaming composition may be performed by pouring the foaming composition into an extruder and melting it, followed by extrusion foaming. The melting may be carried out at a temperature of 180 to 250 ℃, preferably 190 to 220 ℃, the extrusion foaming may be carried out at a temperature of 120 to 200 ℃, preferably 150 to 180 ℃. When the melting and foaming temperatures are within the above ranges, the polypropylene resin is easily melted and the foaming agent is stably present, so the foamability is excellent.

The foaming method of the foaming composition is not limited to the extrusion foaming, and other methods such as atmospheric foaming and bead foaming may be used.

Additional descriptions of the role, components, and properties of the foam board are the same as those described above in the description of the pressure-sensitive adhesive tile, and thus, detailed descriptions are omitted to avoid overlapping descriptions.

The deco sheet production step and the foam board production step are each performed independently, the order of the steps is not limited, and may be performed simultaneously.

When the deco sheet and the foam board are prepared, the step of thermally laminating the deco sheet and the foam board (hereinafter referred to as 'laminating step of the deco sheet and the foam board') is performed.

In the present invention, since the lamination of the deco sheet and the foam board is performed in the thermal lamination method, an in-line process of laminating the deco sheet while producing the foam board without an overlay process of applying and drying an adhesive to the deco sheet and pressing it can be easily combined with In addition, it is possible to solve the problem of deformation of the tile that occurs in the process of curing the adhesive between the decorative sheet and the foam board.

In the laminating step of the decorative sheet and the foam board, thermal lamination may be performed by a process of pressing at a temperature of 150 to 200 °C, preferably at a temperature of 160 to 180 °C. In the case of large changes in foaming rate and specific gravity during foam board production, there is a problem that the stability of the product is lowered. It is low, and the product can be manufactured stably.

On the other hand, as a step independent of the deco sheet production step, the foam board production step, and the laminating step of the deco sheet and the foam board, the step of producing the foam sheet (hereinafter referred to as the 'foam sheet production step') is performed do. In the present invention, the foam sheet has a form in which a release film, an adhesive layer, a reinforcing film, a foam and an adhesive layer are sequentially stacked.

In the present invention, the formation order of each layer of the foam sheet is not particularly limited, and may be appropriately changed according to the convenience of production equipment and processes. For example, the foam sheet is formed by thermally laminating a core layer on the coating layer to form a reinforcing film, then forming a foam on the core layer, forming an adhesive layer and a release film on the coating layer, and then on the foam It may be manufactured by a method of forming an adhesive layer on the surface, but is not limited thereto.

The reinforcing film may be manufactured by thermally laminating a polyethylene-based core layer and a polypropylene-based coating layer. Therefore, even if the reinforcing film is configured in the form of two layers of a coating layer and a core layer, it is not necessary to form a separate adhesive layer for laminating them, and a problem of shrinkage due to curing of the adhesive does not occur.

Thermal lamination of the coating layer and the core layer may be performed at a temperature of 120 to 180 °C, preferably 130 to 150 °C.

After preparing the reinforcing film, foam may be formed on the reinforcing film. The foam may be formed by foaming a polyethylene foam composition comprising a polyethylene resin and a foaming agent, and the polyethylene foam composition is a foaming aid, heat stabilizer, UV stabilizer, antioxidant, lubricant, processing aid, impact modifier, pigment, filler It may further include additives such as. As the foaming agent and additive, components generally used for foaming polyethylene resins in the art may be used, and it is also possible to use the components disclosed in the polypropylene foaming composition. In addition, the polyethylene foam composition may be foamed by a method such as dissolution foaming, pressure foaming, or bead foaming.

When the laminate of the reinforcing film and the foam is completed, an adhesive layer for adhering to the release film may be formed on the reinforcing film, and an adhesive layer for adhering to the foam board may be formed on the foam.

The pressure-sensitive adhesive layer may be formed by applying a pressure-sensitive adhesive on the coating layer of the reinforcing film, and the type of the pressure-sensitive adhesive is not particularly limited, and any pressure-sensitive adhesive used in the art may be used. For example, an acrylic adhesive, a silicone adhesive, etc. can be used.

The adhesive layer may be formed by applying an adhesive on the foam, and the type of the adhesive is not particularly limited as long as it is an adhesive that can be used for adhesion of a polyolefin-based material. For example, an acrylic adhesive, a urethane adhesive, etc. may be used.

The release film may be formed by coating a release agent on a polyethylene terephthalate film. Coating of the release agent may be performed by a known method such as gravure coating, roll coating, spray coating, slot die coating, and the like.

Additional descriptions of the role, components, and properties of the foam sheet and each layer included in the foam sheet are the same as those described above in the description of the pressure-sensitive adhesive tile, and thus, detailed descriptions are omitted to avoid overlapping descriptions.

In one embodiment of the present invention, an adhesive surface release film may be further formed on the adhesive layer in the foam sheet production step. The adhesive surface release film is formed to protect the adhesive layer of the foam sheet, and is removed when the foam sheet is adhered to the foam board or the balance sheet in a subsequent process.

Since the foam sheet production step is performed independently of the deco sheet production step, the foam board production step, and the laminating step of the deco sheet and the foam board, the order of the steps is not limited. For example, the foam sheet production step may be performed before the production of the decorative sheet and the foam board, and may be performed after the production of either or both. Alternatively, it is also possible to perform the foam sheet production step after lamination of the decorative sheet and the foam board, and may be performed simultaneously with any one of the above steps.

When the production of the foam sheet is completed, a step of attaching the foam sheet to the foam board (hereinafter referred to as 'foam sheet attaching step') is performed.

The foam sheet attaching step is performed by attaching the adhesive layer of the foam sheet to the surface on which the deco sheet is not laminated as one side of the foam board laminated with the deco sheet. When the adhesive surface release film is formed on the adhesive layer of the foam sheet in the foam sheet production step, attachment may be performed after removing the adhesive surface release film.

When the foam sheet attaching step is completed, an adhesive tile having a structure in which a deco sheet, a foam board, and a foam sheet are sequentially stacked is formed.

In one embodiment of the present invention, the method of manufacturing the pressure-sensitive adhesive tile includes the steps of producing a balance sheet (hereinafter referred to as a 'balance sheet production step'), and thermally laminating the balance sheet and the foam board (hereinafter, referred to as 'the step of laminating the balance sheet and the foam board') may be further included.

The balance sheet may be formed of a polypropylene resin composition including a polypropylene resin, and an additional description of the role, component, and physical properties of the balance sheet is the same as described above in the description of the adhesive tile, so the overlapping description A detailed description is omitted to avoid .

In the present invention, since the lamination of the balance sheet and the foam board is performed in a thermal lamination method, the process can be performed simply without applying and drying the adhesive and then pressing the adhesive.

Thermal lamination of the balance sheet and the foam board may be performed at a temperature of 150 to 200 °C, preferably at a temperature of 160 to 180 °C.

The production step of the balance sheet is performed independently of the deco sheet production step, the foam board production step and the foam sheet production step, and the order with the steps is not limited.

The laminating step of the balance sheet and the foam board may be performed before or after the laminating step of the deco sheet and the foam board. For example, after laminating the deco sheet and the foam board, the balance sheet may be laminated on the surface opposite to the deco sheet as one side of the foam board, or after laminating the balance sheet and the foam board, as one side of the foam board You can also laminate the decorative sheet on the side opposite to the balance sheet.

4 shows a conceptual diagram of a process of a method for manufacturing an adhesive tile according to an embodiment of the present invention. The manufacturing method of the adhesive tile comprises the steps of producing a polypropylene-based decorative sheet; producing a polypropylene-based foam board; Laminating the decorative sheet and foam board by heat; producing a polypropylene-based balance sheet; Laminating the foam board laminated with the decorative sheet with the balance sheet and heat; producing a foam sheet; and attaching the foam sheet to one surface of the balance sheet laminated with the deco sheet and the foam board.

5 shows a conceptual diagram of a process of a method for manufacturing an adhesive tile according to another embodiment of the present invention. The manufacturing method of the adhesive tile comprises the steps of producing a polypropylene-based decorative sheet; producing a polypropylene-based foam board; producing a polypropylene-based balance sheet; Laminating the balance sheet and the foam board by heat; Laminating the balance sheet and the laminated foam board with the deco sheet by heat; producing a foam sheet; and attaching the foam sheet to one surface of the balance sheet laminated with the deco sheet and the foam board.

When the balance sheet is laminated on the foam board according to the embodiment, in the foam sheet attaching step, an adhesive layer of the foam sheet may be attached to the balance sheet. Specifically, by attaching the adhesive layer of the foam sheet to the surface opposite to the deco sheet and the foam board as one side of the balance sheet laminated with the deco sheet and the foam board, the deco sheet, the foam board, the balance sheet and the foam sheet are laminated in order A sticky tile of the structure is formed.

In an embodiment of the present invention, a step of standardizing and cutting the adhesive tile to a predetermined size (hereinafter referred to as a 'cutting step') may be additionally performed. Thereby, it is possible to manufacture a standardized type of adhesive tile.

In one embodiment of the present invention, after the cutting step, a chamfering step of cutting off or pressing by sanding a right-angled edge diagonally may be additionally performed. As a result, a V-shaped groove is formed when the tiles are placed against each other, thereby providing a three-dimensional effect to the tiles.

The finished product manufactured by the above step can be shipped through the inspection and packaging steps.

Example

Hereinafter, the present invention will be described in more detail through examples. These examples are only for illustrating the present invention, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not to be construed as being limited by these examples.

Experimental Example 1: Comparative experiment on curl amount of tiles according to temperature change

According to the configuration of Table 1 below, the adhesive tile according to the present invention and the adhesive tile according to the prior art were prepared, respectively. When laminating the deco sheet and the foam board, in the case of Example 1, it was laminated by a thermal lamination method, and in Comparative Examples 1 and 2, an adhesive layer was formed between the deco sheet and the foam board and laminated.

composition Example 1 Comparative Example 1 Comparative Example 2 deco sheet pp PVC PVC foam board pp PVC pp foam sheet foam PE PE PE reinforcing layer PE PET PET coating layer pp - -

For the adhesive tiles of Examples and Comparative Examples, the amount of curl of the product according to temperature was measured and shown in Table 2 below, and a graph of the results is shown in FIG. 6 . In FIG. 6 , A denotes a tile of Comparative Example 1, B denotes a tile of Comparative Example 2, and C denotes a tile of Example 1.

The curl was measured with a sample of size 290mmХ590mm placed on a horizontal table with the deco sheet facing upward. It was defined as the amount of curl, and in the case of bending toward the decorative sheet, the height lifted from the table was measured for each of the four corners, and the average of the four values was defined as the amount of curl. At this time, when bending toward the foam sheet, it was defined as a forward curl, and when bending toward the deco sheet, it was defined as a reverse curl.

division Comparative Example 1 Comparative Example 2 Example 1 1 day after production 5mm reverse 2mm reverse 0mm -10℃*10min 35mm reverse 26mm reverse 13mm reverse room temperature*10min 5mm forward 3mm reverse 0mm 50℃*10min 45mm forward 25mm forward 15mm forward room temperature*10min 10mm reverse 3mm reverse 2mm forward -10℃*10min 45mm reverse 41mm reverse 13mm reverse room temperature*10min 10mm reverse 5mm reverse 2mm forward 50℃*10min 15mm forward 35mm forward 15mm forward room temperature*10min 30mm reverse 5mm reverse 2mm forward 1 day after room temperature 50mm reverse 2mm reverse 2mm forward

Referring to Table 2 and Figure 6, the tile of Comparative Example 1 using the PVC deco sheet, PVC foam board, and PET reinforcement film had a curl amount of up to 45 mm, and the amount of change of curl (the maximum value of the forward curl and the maximum value of the reverse curl) deviation) was found to be rather high at 90 mm.

This is due to the high strain rate of the PVC material, which is weak to heat, and the difference in the shrinkage and expansion rates between the PVC-based decorative sheet, the PVC-based foam board, the PET-based reinforcing film, and the release paper. At low temperatures, the PVC-based deco sheet expanded in the overlay process tends to be restored to its original state. On the other hand, at high temperature, the expansion rate of the PVC material is large, whereas the PET-based reinforcing film and the release paper hardly shrink or expand, so curling in the forward direction toward the foam sheet is observed.

In addition, the tile of Comparative Example 2 using a PVC deco sheet, PP foam board and PET reinforcement film has a curl amount of up to 41 mm, and a change amount of 76 mm. And although the amount of change in curl was slightly alleviated, the result was still high in strain due to temperature due to the difference in shrinkage and expansion rates between the PP-based material, the PET-based reinforcing film, and the paper release paper.

On the other hand, the tile of Example 1 according to the present invention has a maximum curl amount of 15 mm and a change amount of 28 mm, so it can be seen that the curl amount and change amount are significantly reduced compared to the tiles of Comparative Examples 1 and 2.

Through these results, in the case of the adhesive tile of the present invention comprising a PP-based decorative sheet and foam board, a reinforcing film including a PE-based core layer and a PP-based coating layer, and a PET-based release film, the strain due to heat is low, and each It was confirmed that the difference in the shrinkage expansion rate between the layers was small. In addition, when returning to room temperature, the curl showed 0 or 2 mm, and it was found that when the temperature returned, the tendency to restore the shape was strong.

Experimental Example 2: Comparative experiment on curl amount of finished tile products according to temperature and time

For the adhesive tiles of Examples and Comparative Examples, the curl amount of the product according to temperature and time was measured and shown in Table 3 below. The curl was measured with a sample of size 290mmХ590mm placed on a horizontal table with the deco sheet facing upward, and when bending toward the foam sheet, the height was measured at the middle of each side for two sides in the horizontal direction, and the average of the two values was defined as the amount of curl, and in the case of bending toward the decorative sheet, the height lifted from the table for each of the four corners was measured, and the average of the four values was defined as the amount of curl.

division
(Unit: mm) High temperature
40℃ room temperature low temperature
-10℃ immediately after
(2hr) 5 days later 15 days later immediately after
(2hr) 5 days later 15 days later immediately after
(2hr) 5 days later 15 days later Comparative Example 1 2↓ 20↓ 50 5↓ 100↓ 110↓ 20↓ 100↓ 110↓ Example 1 2↓ 0 0 2↓ 3↓ 0 50↓ 1↓ 0

Referring to Table 3, the tile of Comparative Example 1 using the PVC deco sheet, PVC foam board and PET reinforcement film uses an adhesive when laminating the deco sheet and foam board. The amount of curl increased over time because the tension applied to it was large.

On the other hand, the tile of Example 1 according to the present invention does not use an adhesive in the laminating step of the PP deco sheet and the PP foam board, so there is no problem that the amount of curl is deepened due to the adhesive. And the reinforcing film was restored to its original state as time passed and showed a tendency to decrease the amount of curl. Accordingly, it was found that, in the case of the tile of the present invention, even if curl occurs at the initial stage during storage and transportation of the product immediately after production, it has excellent stability and restoring force during storage, so that stable construction is possible in the case of actual construction.

Experimental Example 3: Abrasion rate and dimensional stability test of finished tile products according to temperature and time

For the adhesive tile of Example 1, the wear rate and dimensional stability of the product according to temperature and time were measured and shown in Table 4 below.

The wear rate was measured through a Taber rubbing test, and a wear test was performed 2,000 times at a rotational speed of 60 rpm and a load of 500 g using a grinding stone CS-17, and the wear rate was calculated according to the following formula .

Wear rate (%) = (initial weight - weight after grinding)x100/rpm

In addition, dimensional stability was evaluated by storing the specimen under the conditions described in Table 4 and measuring the change in length in the horizontal or vertical direction over time.

Properties Exam conditions result Wear rate (%) 60rpm, 500g, 2,000 reps 0.09 Horizontal dimensional stability (mm) 80℃, 2 hours 1.0 room temperature, after 1 hour 0 Vertical dimensional stability (mm) 80℃, 2 hours 0.5 room temperature, after 1 hour 0

From the results of Table 4, it was confirmed that the tile of Example 1 according to the present invention had good wear resistance and had low strain with respect to temperature and time, and thus had excellent dimensional stability.

Experimental Example 4: Hazardous Substance Detection Test

With respect to the adhesive tile of Example 1, heavy metals and volatile substances detection tests were performed under the conditions shown in Table 5 below, and the results are shown in Table 5.

In Table 5 below, the total volatile organic compounds mean the sum of benzene, toluene, ethylbenzene, xylene and styrene.

division test component test criteria result heavy metal
(mg/kg) formaldehyde KS M 1998:2017 not detected cadmium ICP-OES not detected lead ICP-OES not detected Mercury ICP-OES not detected chrome ICP-OES not detected volatile compounds
(mg/m2.h) Total volatile organic compounds (5VOCs) ES 02131. 1b not detected toluene ES 02131. 1b not detected acetaldehyde ES 02131. 1b not detected

As can be seen in Table 5, the adhesive tile of Example 1 according to the present invention did not use a PVC material unlike the conventional tile, so harmful substances caused by the plasticizer were not detected. Therefore, it was confirmed that the adhesive tile of the present invention can be used without the risk of harmful effects on the human body or environmental pollution due to heavy metals and volatile compounds.

The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited by the appended claims. Accordingly, various types of substitution, modification and change will be possible by those skilled in the art within the scope not departing from the technical spirit of the present invention described in the claims, and this also falls within the scope of the present invention. something to do.

100: foam sheet
110: release film 120: adhesive layer
130: reinforcing film 131: polypropylene-based coating layer
131: polyethylene-based core layer 140: foam
150: adhesive layer
200: foam board 300: deco sheet
400: balance sheet

Claims (10)

foam sheet;
a polypropylene-based foam board laminated on the foam sheet; and
As an adhesive tile comprising a polypropylene-based decorative sheet laminated on the polypropylene-based foam board,
the foam sheet
release film;
an adhesive layer laminated on the release film;
a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer;
foam laminated on the reinforcing film; and
An adhesive layer laminated on the foam
Including, adhesive tile. The method of claim 1,
the reinforcing film
polypropylene-based coating layer; and
A polyethylene-based core layer laminated on the polypropylene-based coating layer
It characterized in that it comprises, the adhesive tile. 3. The method of claim 2,
Adhesive tile, characterized in that the polypropylene-based coating layer and the polyethylene-based core layer are laminated in a thickness ratio of 10:90 to 50:50. The method of claim 1,
Adhesive tile, characterized in that the thickness of the reinforcing film is 0.01 to 5mm. The method of claim 1,
Adhesive tile, characterized in that the foam is laminated to a thickness of 1 to 5mm. The method of claim 1,
Between the foam sheet and the foam board,
Further comprising a polypropylene-based balance sheet, adhesive tile. 7. The method of claim 6,
Adhesive tile, characterized in that the thickness of the polypropylene-based balance sheet is 0.01 to 0.5mm. Forming a laminate by thermally laminating a polypropylene-based decorative sheet and a polypropylene-based foam board at 150 to 200°C; and
a release film on the polypropylene-based foam board of the laminate; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; And adhering the adhesive layer of the foam sheet comprising an adhesive layer laminated on the foam sheet
A method of manufacturing an adhesive tile comprising a. Forming a laminate by thermally laminating a polypropylene-based decorative sheet and a polypropylene-based foam board at 150 to 200°C; and
thermally laminating a polypropylene-based balance sheet at 150 to 200° C. on the polypropylene-based foam board of the laminate; and
a release film on the polypropylene-based balance sheet; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; And adhering the adhesive layer of the foam sheet comprising an adhesive layer laminated on the foam sheet
A method of manufacturing an adhesive tile comprising a. Forming a laminate by thermally laminating a polypropylene-based foam board and a polypropylene-based balance sheet at 150 to 200°C; and
Thermal laminating a polypropylene-based decorative sheet on the polypropylene-based foam board of the laminate at 150 to 200°C; and
a release film on the polypropylene-based balance sheet; an adhesive layer laminated on the release film; a reinforcing film laminated on the adhesive layer and including a polyethylene-based core layer; foam laminated on the reinforcing film; And adhering the adhesive layer of the foam sheet comprising an adhesive layer laminated on the foam sheet
A method of manufacturing an adhesive tile comprising a.

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