JPH0351833B2 - - Google Patents

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention relates to a laminated flooring material, and more specifically, a laminated flooring material that is easy to construct using ordinary adhesives, durable for practical use, and that can be easily peeled off when replacing the flooring material. It is related to. (Prior art) Conventionally, this type of laminated flooring has been used in stores and households because it is beautiful and clean, easy to maintain, inexpensive, and has good abrasion resistance and chemical resistance. It is used extensively on the floor. This flooring material has a structure in which a soft synthetic resin layer is provided as an intermediate layer, a soft synthetic resin top layer is laminated on the surface thereof, and an asbestos sheet is laminated as a base material on the back surface. When this flooring material is installed with ordinary adhesive and put into practical use, when the flooring material is replaced, a large amount of asbestos on the back side remains on the underlying surface, causing unevenness on the underlying surface. A major drawback was that it would be difficult to install the flooring in its current state, and if the flooring was to be reinstalled, the asbestos remaining in multiple layers on the underlying surface would have to be removed with great effort. . Conventionally, this type of flooring material has a core material layer made of long-fiber nonwoven fabric, an intermediate layer of soft plastic foam on the surface side, and a surface layer of soft plastic film bonded thereon. Japanese Patent Publication No. 47-41848 relates to a laminated floor material made by bonding a soft plastic layer with a dense structure mixed with a large amount of filler to the back side of the floor material, and a surface layer made of synthetic resin etc. on the surface of a base mainly made of paper or non-woven fabric. JP-A No. 51-99821, Utility Model Application No. 51-105221, Japanese Utility Model Application No. 105221, based on the idea of forming a layer of release material on the back side of the base of flooring, wall materials, etc.
No. 51-107902, No. 51-137930, No. 51-
Publications such as No. 137931 are known. However, in the laminated flooring material disclosed in Japanese Patent Publication No. 47-41848, the laminated floor material has a core material layer made of long-fiber nonwoven fabric as a base material, an intermediate layer of soft plastic foam on the surface, and a surface layer of soft plastic film thereon. It is characterized by bonding a dense soft plastic layer containing a large amount of filler to the back surface of the body (the back surface of the core material layer). In this case, first of all, the core material layer of the laminate is bonded. In order to bond a soft plastic layer with a dense structure mixed with a large amount of filler to the back side of the material, the soft plastic layer with a dense structure is bonded only at the surface part of the long fiber nonwoven fabric that constitutes the core material layer, and the two are completely bonded. Because they are not integrated, if a person walks on the flooring, drags a heavy object on the flooring, or repeatedly applies a local load with a chair with casters, etc., the joint surface may In order to prevent delamination, and secondly, to prevent the formation of wrinkles when bonding a soft plastic layer with a dense structure containing a large amount of filler on the back side of the core material layer, the dense structure is It is necessary to apply tension to the soft plastic layer, and this tension causes the dense soft plastic layer to be bonded to the core layer with internal strain,
This internal strain causes the flooring material to shrink over time, resulting in problems such as a significant deterioration in the dimensional stability of the flooring material. Also, Japanese Patent Application Publication No. 51-99821, Utility Model Application No. 51-105221,
In the publications of Utility Model Application No. 51-107902, Utility Model Application No. 51-137930, and Utility Model Application No. 51-137931, a surface layer is formed using a synthetic resin or the like on the surface of a base mainly made of paper or nonwoven fabric. It is characterized by forming a release agent layer on the back side of the base of the floor, wall material, etc., but in this case, the release agent layer on the back side of the base and the adhesive used to install the flooring material are combined. Basically, they do not adhere to each other, so it is very easy to remove the flooring material. When the adhesive layer is dropped, or when a load is applied locally repeatedly using a chair with casters, etc., peeling occurs at the interface between the release agent layer and the adhesive layer, which poses a serious practical problem. (Means for Solving the Problems) The present invention solves these conventional drawbacks, is sufficiently durable for practical use without problems such as peeling during practical use, and is replaced with adhesive on the base side when replacing the flooring material. It is an object of the present invention to provide a flooring material that can be easily re-installed and has a layer that is so thin that it does not cause any problem and causes the layer to break. That is, the flooring material of the present invention has a heat-resistant synthetic resin layer with a thickness of 0.5 m/m or less obtained by coating and impregnating a liquid synthetic resin composition on one side of a fibrous base material and solidifying it. A laminated flooring material in which a soft synthetic resin intermediate layer and a soft synthetic resin top layer are sequentially laminated on one side, and the heat-resistant synthetic resin layer is separated from the base adhesive when the laminated flooring material is peeled from the base material. The layer is characterized by a property of causing a thin layer to remain on the surface and causing the layer to break. In the laminated flooring material of the present invention, a liquid synthetic resin composition is coated and impregnated on a fibrous base material 1, and a heat-resistant synthetic resin layer 2 is formed by one or more of the solidifying means of heating, ultraviolet irradiation, or electron beam irradiation. Then, a soft synthetic resin intermediate layer 3 is laminated on the surface of the fibrous base material opposite to the surface to which the liquid synthetic resin composition is applied by a calendering method, an extrusion method, a paste coating method, etc. , a printing layer 5 is formed by printing by a gravure printing method, a flexo printing method, a rotary screen printing method, a transfer printing method, etc., and a soft synthetic resin top layer 4 is further applied on this surface by a calendar method, an extrusion method, a paste method, etc. This can be obtained by laminating layers using a coding method or the like. Heating, which is one of the above-mentioned solidification means, may be performed using any known heating method, such as electric heaters, infrared heaters, hot air blowing, Erofin, steam injection, high frequency induction heating, high frequency dielectric heating, etc. be able to.
Among the above-mentioned resin lamination methods, the paste coating method is common, and here, a method for manufacturing a flooring material using the paste coating method will be described.
A liquid synthetic resin composition is coated and impregnated onto the fibrous base material 1, heated at 50°C to 250°C for 30 seconds to 15 minutes to solidify the liquid synthetic resin composition, and then exposed to ultraviolet light or A heat-resistant synthetic resin layer 2 is formed by irradiation with an electron beam, and a vinyl chloride resin plastisol is applied to the surface opposite to the surface to which the liquid synthetic resin composition is applied, and then heated at 120°C to 250°C for 30 seconds to 5 minutes. Heated to form a soft synthetic resin intermediate layer 3, then coated with vinyl chloride resin plastisol and heated at 150°C to 250°C.
After heating for 30 seconds to 5 minutes to melt the vinyl chloride resin plastisol, embossing is performed as necessary, and then irradiation with ultraviolet rays or electron beams is performed as necessary. From the viewpoint of the design of the flooring material, it is preferable to form a printed layer 5 in which an arbitrary pattern is printed on the soft synthetic resin intermediate layer 3. Methods for printing arbitrary patterns include gravure printing,
The printing ink may be printed directly on the surface of the soft synthetic resin intermediate layer using a flexo printing method, rotary screen printing method, etc., or the printing ink may be printed on transfer paper and transferred onto the surface of the soft synthetic resin intermediate layer 3. good. Furthermore, it is possible to perform not only printing but also both printing and embossing, and in this case, it is also possible to perform printing and embossing at the same time, such as valley dyeing embossing and head stain printing. In addition, when the soft synthetic resin intermediate layer 3 is foamed with a chemical foaming agent, a part of the pattern of the printed layer 5 is printed with an ink containing a foaming agent and/or a foaming accelerator. Embossing is also possible. Further, by printing a part of the pattern on the printing layer 5 with foaming ink and/or non-foaming ink, printing and unevenness can be synchronized. As a means for coating and impregnating the liquid synthetic resin composition on the fibrous base material 1, any commonly used method may be used, such as a knife coater, roll coater, gravure printer, rotary screen, curtain flow coater, date coating, etc. is preferred. When applying a liquid synthetic resin composition thinly and uniformly to a fibrous base material 1 such as glass paper with a low density of glass fibers (coarse mesh), it is important to prevent the liquid synthetic resin composition from seeping onto the back side of the glass paper. Gravure printers, roll coaters, rotary screens, etc. are suitable. In addition, the viscosity of the liquid synthetic resin composition is 1
It is necessary to adjust the viscosity appropriately depending on the fiber density and application method. For example, in the case of a fibrous base material 1 with a high fiber density, such as an asbestos sheet, the liquid synthetic resin composition can be applied with a viscosity ranging from low to high, and the appropriateness depends on each application method. The viscosity can be adjusted within the viscosity range, but the liquid synthetic resin composition is applied using a knife coater to a fibrous base material 1 that does not have a high fiber density, such as glass fiber paper with a glass fiber density of about 0.12 g/cc. When coating, the viscosity of the liquid synthetic resin composition is preferably adjusted to about 10,000 cps to 500,000 cps. In addition, when using a fibrous base material 1 with a low fiber density (coarse mesh), and even if the liquid synthetic resin composition is applied, the impregnation with the liquid synthetic resin composition is insufficient. When the soft synthetic resin intermediate layer 3 is laminated on the surface opposite to the surface on which the liquid synthetic resin composition is applied, air bubbles enter the laminated interface, and when this foams, abnormal foaming may occur due to the influence of the air bubbles. In such cases, the surface opposite to the surface to which the liquid synthetic resin composition is applied is sealed with, for example, vinyl chloride resin paste, or the liquid synthetic resin composition is applied to the fibrous base material 1 and dried. It is preferable that the soft synthetic resin intermediate layer 3 be laminated after heating and compressing between rolls to smooth the laminated surface. In addition, when the flooring material is bonded to the base to such an extent that it does not peel off during practical use, and when the flooring material is peeled off, the thinness of the heat-resistant synthetic resin layer 2 is destroyed due to the destruction of the heat-resistant synthetic resin layer 2 on the back side of the flooring material. The adhesion strength between the heat-resistant synthetic resin layer 2 and the adhesive layer or the interlayer peeling strength due to destruction of the heat-resistant synthetic resin layer 2 is 0.3 to 5 kg/2 cm in order to separate the layer so that it remains on the base together with the adhesive. Preferably, the width is the same. If this adhesive strength or interlayer peel strength is less than 0.3 kg/2cm width, the adhesive strength with the base will be too weak and peeling will occur during practical use, or the adhesive strength or interlayer peel strength will be less than 5 kg/2 cm.
If the width is exceeded, it becomes difficult to separate the flooring material from the base. ●Fibrous base material The fibrous base material 1 used in the present invention may be a single layer or two or more layers as long as it has excellent dimensional stability such as a felt sheet, woven fabric, knitted fabric, or nonwoven fabric. Although multi-layered ones can be used, in particular, from the viewpoint of dimensional stability, asbestos sheets, sheets mixed with at least two or more types of inorganic and/or organic fibers such as asbestos, glass fiber, paper, and polyester fibers, glass fiber paper, Paper or the like is preferred. Heat-resistant synthetic resin layer <liquid synthetic resin composition> The liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2 used in the present invention includes a soft synthetic resin intermediate layer 3 and a soft synthetic resin top layer. In lamination processing such as No. 4, it has a heat resistance that does not stick to the heated support in the heating furnace, and it also uses an adhesive for ordinary flooring construction. Any material can be used as long as it adheres to a degree that does not cause peeling during practical use even after processing the flooring material, and causes interlayer peeling due to destruction of the heat-resistant synthetic resin layer 2 when the flooring material is peeled off. The liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2 used in the present invention is preferably the following, but the present invention is not limited thereto. A composition in which a vinyl chloride paste is blended with a large amount of an inorganic and/or organic filler with excellent heat resistance A composition in which a vinyl chloride paste is blended with a compound that crosslinks by means such as ultraviolet irradiation or electron beam irradiation Non-reactive type A composition in which a large amount of an inorganic and/or organic filler with excellent heat resistance is blended into a non-reactive liquid composition such as a synthetic resin emulsion or non-reactive synthetic rubber latex. A composition in which a compound that crosslinks by heating is blended into a non-reactive liquid composition such as a non-reactive synthetic rubber latex.A non-reactive liquid composition such as a non-reactive synthetic resin emulsion or a non-reactive synthetic rubber latex. Compositions containing compounds that crosslink by means such as ultraviolet irradiation or electron beam irradiation Reactive liquid compositions such as reactive synthetic resin emulsion or reactive synthetic rubber latex Liquid compositions containing compounds that crosslink by heating Ultraviolet irradiation or reactive liquid compositions such as reactive synthetic rubber latex Liquid composition composed of a compound crosslinked by electron irradiation When the liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2 is the composition, this vinyl chloride resin paste composition contains 100 parts by weight of vinyl chloride resin. 30 to 130 parts by weight of plasticizer, appropriate amount of stabilizer, 50 to 400 parts by weight of inorganic and/or organic filler with excellent heat resistance, and if necessary, viscosity modifier, coloring agent, etc. Consisting of appropriate amounts. If the amount of plasticizer is less than 30 parts by weight based on 100 parts by weight of the vinyl chloride resin, the heat-resistant synthetic resin layer 2 will become too hard and its low-temperature properties will deteriorate, making it difficult to apply in winter, which is not preferable. Furthermore, if the amount of plasticizer exceeds 130 parts by weight per 100 parts by weight of vinyl chloride resin, not only will the heat-resistant synthetic resin layer 2 become extremely sticky, but especially when applied with a synthetic rubber latex adhesive, plasticizer A large amount of the agent migrates to the synthetic rubber adhesive layer, resulting in a significant decrease in adhesive strength.
This is not preferable since it causes problems such as warping and peeling of the flooring material during practical use. The amount of inorganic and/or organic filler with excellent heat resistance is 50 parts by weight per 100 parts by weight of vinyl chloride resin.
If the amount is less than parts by weight, the heat-resistant synthetic resin layer 2
The material sticks to the support while it is heated in the heating furnace, making it impossible to achieve the intended purpose. or,
When the amount of the inorganic and/or organic filler with excellent heat resistance exceeds 400 parts by weight per 100 parts by weight of the vinyl chloride resin, the amount of the filler becomes too large and the heat-resistant synthetic resin layer 2 becomes brittle. This is not preferable because the flooring material becomes easy to break when it is installed. An inorganic and/or organic filler with excellent heat resistance and a larger particle size is more effective in preventing adhesion to a heated support in a heating furnace even when added in a relatively small amount. This is because the larger the particle size, the rougher the surface of the heat-resistant synthetic resin layer 2 and the smaller the contact area with the heated support. This is thought to be due to the arrangement of the inorganic and/or organic fillers with large particle sizes and excellent heat resistance, which prevents adhesion to the heated support. When the liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2 is the composition, the vinyl chloride resin paste composition contains 10 to 100 parts by weight of a plasticizer per 100 parts by weight of the vinyl chloride resin, 0.5 to 100 parts by weight of a compound crosslinked by ultraviolet irradiation or electron beam irradiation, an appropriate amount of stabilizer, and, if necessary, a polymerization initiator, photosensitizer, catalyst, viscosity modifier, colorant,
It consists of appropriate amounts of a foam stabilizer, a foaming agent, an inorganic and/or organic filler with excellent heat resistance, and the like. If the amount of plasticizer is less than 10 parts by weight based on 100 parts by weight of the vinyl chloride resin, the heat-resistant synthetic resin layer 2 will become too hard and its low-temperature properties will deteriorate, making installation in winter difficult and undesirable. . Furthermore, if the amount of plasticizer exceeds 100 parts by weight per 100 parts by weight of the vinyl chloride resin, not only will the heat-resistant synthetic resin layer 2 become extremely sticky, but also especially when applied with a synthetic rubber latex adhesive. , a large amount of plasticizer migrates to the adhesive layer of synthetic rubber,
Since the adhesive strength is significantly reduced, problems such as warping and peeling of the flooring material occur during practical use, which is not preferable. If the amount of the compound crosslinked by means such as ultraviolet irradiation or electron beam irradiation is less than 0.5 parts by weight per 100 parts by weight of vinyl chloride resin, the degree of crosslinking is low and the support is heated in a heating furnace. It sticks to the pair and cannot achieve the intended purpose.
In addition, the amount of compounds crosslinked by ultraviolet irradiation or electron beam irradiation, etc. per 100 parts by weight of vinyl chloride resin.
If it exceeds 100 parts by weight, the degree of crosslinking will become too high and the heat-resistant synthetic resin layer 2 will become hard and brittle, making it impractical. When the liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2 is a composition of It consists of 150 to 950 parts by weight of an inorganic and/or organic filler with excellent heat resistance per 100 parts by weight, and, if necessary, appropriate amounts of a viscosity modifier, a coloring agent, etc. The amount of inorganic and/or organic fillers with excellent heat resistance depends on the amount of synthetic resin or synthetic rubber contained in the emulsion or latex.
If the amount is less than 150 parts by weight relative to 100 parts by weight, the heat-resistant synthetic resin layer 2 will stick to the heated support in the heating furnace, making it impossible to achieve the intended purpose. . In addition, the amount of organic filler and/or organic filler with excellent heat resistance depends on the amount of synthetic resin or synthetic rubber contained in the emulsion or latex.
If the amount exceeds 950 parts by weight relative to 100 parts by weight, the heat-resistant synthetic resin layer 2 becomes brittle and the flooring material tends to break during installation, which is not preferable. When the liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2 is a composition of
10 to 100 parts by weight of a compound crosslinked by heating, ultraviolet irradiation, electron beam irradiation, etc., per 100 parts by weight;
It also contains appropriate amounts of polymerization initiators, photosensitizers, catalysts, viscosity modifiers, colorants, foam stabilizers, and inorganic and/or organic fillers with excellent heat resistance, as required. The amount of the compound that crosslinks by heating, ultraviolet irradiation, electron beam irradiation, etc. is 100% of the synthetic resin or synthetic rubber contained in the non-reactive liquid composition, etc.
If the amount is less than 10 parts by weight, the degree of crosslinking of the heat-resistant synthetic resin layer is low and it will stick to the heated support in the heating furnace, making it impossible to achieve the intended purpose. It is. In addition, if the amount of the compound crosslinked by means such as heating, ultraviolet irradiation, or electron beam irradiation exceeds 100 parts by weight per 100 parts by weight of the synthetic resin or synthetic rubber contained in the emulsion or latex, the degree of crosslinking will decrease. If it becomes too high, the heat-resistant synthetic resin layer 2 will become hard and brittle, making it impractical. Additionally, the addition of inorganic and/or organic fillers with excellent heat resistance may improve adhesion to adhesives for floor construction. When the liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2 is a composition of It consists of appropriate amounts of inorganic and/or organic fillers that are excellent regulators, foam stabilizers, colorants, and heat-resistant agents. The above reactive synthetic resin emulsion,
If the synthetic rubber latex or the like is self-crosslinking, it will crosslink alone to form the heat-resistant synthetic resin layer 2, but if the heat resistance is to be further improved, the addition of a crosslinking agent is effective. Additionally, the addition of inorganic and/or organic fillers with excellent heat resistance may improve adhesion to adhesives for floor construction. When the liquid synthetic resin composition for forming the heat-resistant synthetic resin layer is a composition of , a polymerization initiator, a photosensitizer, a catalyst, a colorant, an inorganic and/or organic filler with excellent heat resistance, etc., in appropriate amounts. Addition of an inorganic and/or organic filler with excellent heat resistance to the liquid compound that is crosslinked by means such as heating, ultraviolet irradiation, or electron beam irradiation can also improve adhesion to adhesives for floor construction. be. <Conditions for solidifying the liquid synthetic resin composition> The following methods are suitable for solidifying the liquid synthetic resin composition for forming the heat-resistant synthetic resin layer 2, but the present invention is not limited thereto in any way. It is not something that will be done. In the case of a composition of 120% of the liquid synthetic resin composition
Preheat at 180°C to 180°C for 30 seconds to 6 minutes to make it semi-solid, then heat at 180°C to 250°C for 30 seconds to 5 minutes to melt the vinyl chloride resin, or preheat as described above. It is preferable to heat the liquid synthetic resin composition at 180 DEG C. to 250 DEG C. for 30 seconds to 5 minutes to melt the vinyl chloride resin. In the case of the above composition as well, it is preferable that the vinyl chloride resin be melted by heating under the same conditions as the above composition, and then crosslinked by irradiation with ultraviolet rays or electron beams. In the case of a composition, the liquid synthetic resin composition is heated to 50℃.
It is preferable to heat dry at ~180°C for 30 seconds to 15 minutes. In the case of a composition, the liquid synthetic resin composition is heated to 50℃.
~100℃ after heating and drying at ~150℃ for 30 seconds ~ 15 minutes
The liquid synthetic resin composition is heated at 200°C for 30 seconds to 10 minutes to crosslink, or the liquid synthetic resin composition is heated at 100°C to 200°C for 30 minutes.
It is preferable to heat for 15 seconds to 15 minutes to effect crosslinking.
In the case of emulsions and latexes, if they are heated at high temperatures from the beginning, they tend to foam abnormally due to the influence of moisture. In such cases, the two-stage heating described above is preferable, and if there are no such problems, the above-mentioned method can be used. A one-stage heating method is efficient. In the case of a composition, the liquid synthetic resin composition is heated to 50°C to 180°C.
It is preferable to crosslink the compound by heating and drying it for 30 seconds to 15 minutes and then irradiating it with ultraviolet rays or electron beams. In the case of the composition, it is preferable to carry out crosslinking under the same conditions as in the case of the above-mentioned composition. In the case of the composition, crosslinking is preferably carried out by heating at 50°C to 200°C for 30 seconds to 15 minutes. In the case of the composition, the liquid compound can be crosslinked and cured in a shorter time by irradiating the liquid compound with ultraviolet rays or electron beams. If this compound contains a dispersion medium such as water or a solvent, it is preferable to heat the compound in advance to remove the dispersion medium before irradiating it with ultraviolet rays or electron beams. Ultraviolet irradiation can be performed using a low-pressure mercury lamp, medium-pressure mercury lamp, high-pressure mercury lamp, or ultra-high pressure mercury lamp, and the ultraviolet irradiation time can be varied depending on the strength of the mercury lamp used. That is, when the intensity of the mercury lamp is strong, the irradiation time can be shortened, whereas when the intensity of the mercury lamp is weak, the irradiation time needs to be lengthened. Furthermore, when irradiating with ultraviolet rays, it is preferable that the liquid synthetic resin composition be transparent or semi-transparent, and it is difficult to irradiate ultraviolet rays with opaque compositions. When the liquid synthetic resin composition is opaque, it is preferable to perform electron beam irradiation. Furthermore, electron beam irradiation has a faster production rate than ultraviolet irradiation, and can crosslink even opaque synthetic resin compositions containing large amounts of fillers. It is more advantageous. <Thickness of the heat-resistant synthetic resin layer> Thickness of the heat-resistant synthetic resin layer 2 obtained by coating and impregnating the fibrous base material 1 with a liquid synthetic resin composition (the thickness of the heat-resistant synthetic resin layer 2 obtained by coating and impregnating the fibrous base material 1 with a liquid synthetic resin composition) The thickness (thickness obtained by subtracting the thickness of the fibrous base material 1 from the thickness of the impregnated material) is:
Keep it below 0.5m/m. If the thickness of the heat-resistant synthetic resin layer 2 is 0.5 m/m or more, the unevenness of the base will become large when the flooring material is peeled off, making it impossible to construct the flooring material on top of it in that state. This is because the intended purpose of the present invention cannot be achieved. In addition, from the viewpoint of reducing the weight of the flooring material itself, the heat-resistant synthetic resin layer 2 can be foamed, but if the foaming ratio is increased, the foamed layer will break when the flooring material is peeled off.
It is preferable that the density of the foam layer is 0.2 g/cc or more. As a method for forming the foam layer, a method using a chemical foaming agent, a method using mechanical foaming, etc. can be used. - Soft synthetic resin intermediate layer <composition> The soft synthetic resin composition for forming the soft synthetic resin intermediate layer 3 used in the present invention may be any material as long as it can withstand use as a flooring material, but vinyl chloride It is common to use a resin paste, and a vinyl chloride resin paste composition will also be described below. The vinyl chloride resin paste composition for forming the soft synthetic resin intermediate layer is made of vinyl chloride resin.
Consists of 20 to 120 parts by weight of plasticizer, an appropriate amount of stabilizer, and appropriate amounts of viscosity modifier, foaming agent, foam stabilizer, coloring agent, filler, metal powder, etc., per 100 parts by weight. . If the amount of plasticizer is less than 20 parts by weight based on 100 parts by weight of the vinyl chloride resin, the soft synthetic resin intermediate layer 3 will become too hard, resulting in poor low-temperature properties (especially flexibility at low temperatures) and poor performance in winter. This is not desirable as it makes construction difficult. On the other hand, if the amount of plasticizer exceeds 120 parts by weight per 100 parts by weight of vinyl chloride resin, the transfer of the plasticizer from the soft synthetic resin intermediate layer 3 to the soft synthetic resin top layer 4 will increase, causing the surface of the flooring material to deteriorate. This is not preferable since it has the drawback that it becomes extremely sticky, resulting in increased contamination of the surface of the flooring material. Furthermore, it is advantageous in terms of construction and cost to foam the soft synthetic resin intermediate layer 3 unless there is a special reason. Foaming methods include a method in which a chemical foaming agent is added to the vinyl chloride resin paste and the chemical foaming agent is decomposed by heating to cause foaming, and a method in which a foam stabilizer is added to the vinyl chloride resin paste to create a foam mechanically. , and a method of adding the vinyl chloride resin paste and a hollow balloon-like substance, and any of these methods can be used in the present invention. the aforementioned chemical blowing agent;
The amount of the foam stabilizer and the hollow balloon-like substance is adjusted as necessary. Further, in order to improve the cigarette flame resistance of the flooring material, it is necessary to increase the thermal conductivity of the soft synthetic resin intermediate layer 3. In this case, the soft synthetic resin intermediate layer 3 needs to have a non-foamed structure. In this case, the thermal conductivity of the soft synthetic resin intermediate layer 3 is increased by adding an inorganic filler and/or a metal powder, and the cigarette ignition resistance of the floor material is considerably improved. The amount of inorganic filler added is preferably 400 parts by weight or less per 100 parts by weight of vinyl chloride resin, and the amount of metal powder added is preferably 400 parts by weight or less per 100 parts by weight of vinyl chloride resin.
It is preferably 600 parts by weight or less. Of course, it is also possible to use an inorganic filler and metal powder together. If the amount of inorganic filler exceeds 400 parts by weight per 100 parts by weight of vinyl chloride resin, the mechanical strength of the soft synthetic resin intermediate layer 3 will be weakened, making it weak against bending and reducing the weight of the flooring itself. It is not preferable because it becomes heavy and the workability deteriorates.
Furthermore, if the amount of metal powder exceeds 600 parts by weight per 100 parts by weight of vinyl chloride resin, the mechanical strength of the soft synthetic resin intermediate layer 3 will be weakened, making it weak against bending and making the flooring material heavier. This is not preferable because it impairs workability. <Thickness of the soft synthetic resin intermediate layer> The thickness of the soft synthetic resin intermediate layer 3 is generally 0.05 m/
m to 4.00 m/m, but is not particularly limited to this range. However, if the thickness of the soft synthetic resin intermediate layer 3 exceeds 4.00 m/m, the resulting flooring material will be very thick, which is inconvenient for construction and is not very preferable. Further, the soft synthetic resin intermediate layer 3 may be a foamed layer or a non-foamed layer. However, if the soft synthetic resin intermediate layer 3 is made of a non-foamed layer, the weight of the flooring material will be heavy and transportation and construction of the flooring material will be inconvenient, so it is better to use a foamed layer unless there is a special reason. In addition, methods for forming a foam layer include a method using a chemical foaming agent and a method using mechanical foaming, but when performing chemical embossing, a method using a chemical foaming agent is required.
In other cases, mechanical foaming can also be used. ●Soft synthetic resin top layer <Composition> The soft synthetic resin composition for forming the soft synthetic resin top layer 4 used in the present invention has excellent mechanical strength and can withstand use as a top layer of flooring materials. Although any material may be used, vinyl chloride paste is generally used, and the vinyl chloride resin paste composition will be described below. The vinyl chloride resin paste composition for forming the soft synthetic resin top layer 4 contains 10 to 100 parts by weight of a plasticizer, an appropriate amount of a stabilizer, and, if necessary, a viscosity of 100 parts by weight of a vinyl chloride resin. Conditioners, colorants, fillers, compounds that crosslink by means such as ultraviolet irradiation or electron irradiation,
It consists of an appropriate amount of photosensitizer, etc. If the amount of plasticizer is less than 10 parts by weight based on 100 parts by weight of vinyl chloride resin, the soft synthetic resin top layer 4 will become too hard, the surface will be slippery as a flooring material, and the low-temperature properties (especially The flexibility at low temperatures deteriorates, making construction in the winter difficult and undesirable. On the contrary, the amount of plasticizer is vinyl chloride resin
If the amount exceeds 100 parts by weight, the surface of the flooring material becomes extremely sticky, and as a result, the surface of the flooring material becomes seriously contaminated, which is not preferable. When printing is performed on the surface of the soft synthetic resin intermediate layer 4, the soft synthetic resin top layer 4 needs to be transparent or translucent; however, in other cases, the soft synthetic resin top layer 4 4 may be opaque, and in this case, it is more advantageous in terms of cost to use a filler. In addition, in order to improve the cigarette flame resistance of the flooring material, it is necessary to improve the heat resistance of the soft synthetic resin top layer 4, and in this case, it is necessary to improve the heat resistance of the soft synthetic resin top layer 4. It is necessary to add a crosslinking compound and, if necessary, a photosensitizer and the like to the vinyl chloride resin paste composition for forming the soft synthetic resin top layer 4. When the means for crosslinking the compound contained in the soft synthetic resin top layer 4 that is crosslinked by ultraviolet irradiation, electron beam irradiation, etc. is ultraviolet irradiation, it is better to use a photosensitizer in combination. When the means for crosslinking the compound is electron beam irradiation, there is no need to use a photosensitizer together. The amount of the compound crosslinked by means such as ultraviolet irradiation or electron beam irradiation is preferably 10 to 100 parts by weight based on 100 parts by weight of the vinyl chloride resin. If the amount of the compound crosslinked by means such as ultraviolet irradiation or electron beam irradiation is less than 10 parts by weight per 100 parts by weight of vinyl chloride resin, the degree of crosslinking will be low and the cigarette flame resistance will be poor and the intended purpose will not be met. It is unattainable.
On the other hand, if the amount of the compound crosslinked by means such as ultraviolet irradiation or electron beam irradiation exceeds 100 parts by weight per 100 parts by weight of vinyl chloride resin, the degree of crosslinking will be too high and the surface of the flooring material will become too hard and slippery. Not only that, but the flooring also warps during use, making it impractical. <Thickness of the soft synthetic resin top layer> The thickness of the soft synthetic resin top layer 4 is 0.05~m/m~
2.00m/m is preferred. If the thickness of the soft synthetic resin top layer 4 is less than 0.05 m/m, the soft synthetic resin top layer 4 will quickly wear out due to people walking, etc., and the life of the flooring material will be shortened. Undesirable.
Furthermore, if the thickness of the soft synthetic resin top layer 4 exceeds 2.00 m/m, the floor material itself becomes hard, which is inconvenient to install, and it also tends to warp or shrink, which is not very preferable. <Aspects of the soft synthetic resin top layer> The soft synthetic resin top layer 4 may be colorless and transparent, transparent or opaque colored in any color, and from the viewpoint of the design of the flooring material, the soft synthetic resin top layer 4 may be made of a soft synthetic resin top layer. The layer 4 may contain monochromatic or multicolored synthetic resin powder, chips, lumps, etc. colored in any desired color. If the monochromatic or multi-colored synthetic resin powder, chips, or lumps colored in any color are transparent or translucent, they can be combined with the printed pattern on the surface of the soft synthetic resin intermediate layer 3 to form a mosaic. If the synthetic resin powder, chips, lumps, etc. are opaque and have a monochromatic or multi-colored color, the synthetic resin powder, chips, lumps, etc.
A unique design is expressed using lumps, etc. Furthermore, by imparting heat resistance to the soft synthetic resin top layer 4, even if a lit cigarette is left on the surface of the flooring material or a lit cigarette is smudged on the surface of the flooring material, the surface of the flooring material will remain intact. To provide a cigarette flame-resistant flooring material that does not discolor or cause scorch marks. A method for imparting heat resistance to the soft synthetic resin top layer 4 is to mix a soft synthetic resin composition with a compound that crosslinks by heating, ultraviolet irradiation, electron beam irradiation, etc. Although there are methods of crosslinking using ultraviolet irradiation, electron beam irradiation, or crosslinking with electron beam irradiation, preferred from the viewpoint of crosslinking properties. Moreover, this soft synthetic resin top layer 4
When embossing is performed on the substrate, it is preferable to perform the embossing before irradiation with ultraviolet rays or electron beams. In order to improve the cigarette ignition resistance of the flooring material, as mentioned above, the soft synthetic resin top layer 4 is given heat resistance, and the soft synthetic resin intermediate layer 3 and the heat-resistant synthetic resin layer 2 are made of a non-foamed structure. It is preferable to mix a large amount of filler and/or metal powder to improve the heat conduction of the floor material itself. ●Compounds and additives used in the present invention <vinyl chloride resin> Heat-resistant synthetic resin layer 2, soft synthetic resin intermediate layer 3,
The vinyl chloride resin used in the vinyl chloride resin paste composition for forming the soft synthetic resin top layer 4 includes commonly used emulsion polymerized vinyl chloride resins, suspension polymerized vinyl chloride resins, bulk polymerized vinyl chloride resins, etc. Vinyl chloride resin can be used. Also,
In addition to vinyl chloride homopolymer, vinyl acetate,
Copolymers of vinyl chloride and one or more of ethylene, alkyl ethers, acrylic esters, methacrylic esters, etc. can also be used, and these homopolymers and copolymers can be used alone or in combination. Also, other polymers can be blended with the vinyl chloride resins as described above. Examples of resins that can be blended include, but are not limited to, acrylonitrile-butadiene copolymers, ethylene-vinyl acetate copolymers, acrylonitrile-butadiene-styrene copolymers, and acrylic resins. <Plasticizer> As the plasticizer, commonly used plasticizers can be used, examples of which are listed below. Phthalate ester plasticizers include dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diisobutyl phthalate, dioctyl phthalate, octyl capryl phthalate, dicyclohexyl phthalate, didodecyl phthalate, butyl benzyl phthalate, dimethyl glycol phthalate, ethyl phthalyl ethyl glycolate, Methylphthalyl ethyl glycolate, butylphthalyl butyl glycolate, diisodecyl phthalate, etc. are used. Examples of phosphorous ester plasticizers include tributyl phosphate, tricresyl phosphate, triphenyl phosphate, trichloroethyl phosphate, trioctyl phosphate, triethyl phosphate, diphenyl cresyl phosphate, arylalkyl phosphate, Diphenyl monoorthoxenyl phosphate and the like are used. Examples of fatty acid ester plasticizers include methyl acetyl ricinoleate, dioctyl adipate, dioctyl azelate, dibutyl sebacate, dioctyl sebacate, triacetyl glycerin, glycerol butyrate, diisodecyl succinate, diisodecyl adipate, succinic acid mixed alkyl ester, etc. used. In addition, trimellitic acid ester plasticizers such as trioctyl trimellitic acid, epoxy plasticizers such as epoxidized soybean oil and various epoxy resins, polyester polymer plasticizers, etc. can also be used. Furthermore, for the purpose of reducing the viscosity of the vinyl chloride resin paste, small amounts of viscosity modifiers such as gasoline, octane, benzene, toluene, naphtha,
A volatile diluent such as a dodecylbenzene derivative or a viscosity reducing agent such as various surfactants may be used in combination with the plasticizer. <Stabilizer> Any stabilizer that is normally used for vinyl chloride resin can be used. Specifically, in addition to metal stabilizers such as cadmium, zinc, barium, calcium, strontium, aluminum, magnesium, cerium, sodium, lead, and tin,
Organic phosphorus compounds, polyhydric alcohols, epoxy compounds, etc. can be used alone or in combination of two or more. The amount of the stabilizer added is preferably 0.1 to 10 parts by weight per 100 parts by weight of the vinyl chloride resin. <Synthetic resin emulsion, synthetic rubber latex> Any commonly used non-reactive synthetic resin emulsion or synthetic rubber latex can be used. Specifically, vinyl chloride resin emulsion, vinyl chloride-ethylene copolymer emulsion, vinyl chloride-vinylidene chloride copolymer emulsion, vinyl chloride-vinyl acetate copolymer emulsion, vinylidene chloride resin emulsion, vinyl acetate resin emulsion, and acetic acid. Synthetic resin emulsions such as vinyl-acrylic copolymer emulsion, ethylene-vinyl acetate copolymer emulsion, acrylic resin emulsion, acrylic-styrene copolymer emulsion, urethane resin emulsion, or SBR latex, NBR latex, CR latex, IIR Synthetic rubber latex such as latex can be used. These may be used alone or in combination of two or more. In addition to the above emulsions and latexes, solutions of synthetic resins and synthetic rubbers dissolved in organic solvents or water can also be used in the same way as the above emulsions and latexes. Any commonly used synthetic resin emulsion or synthetic rubber latex can be used, but specifically, reactive groups such as carboxyl groups, hydroxyl groups, and amide groups are introduced into the emulsion or latex polymer. Products that are heat-crosslinked by adding an initial condensate of melamine or urea as a crosslinking agent, or products that have reactive groups such as glycidyl groups or methylol groups introduced into emulsions or latex polymers, such as acrylic esters or methacrylic esters. An emulsion obtained by copolymerizing the main component with glycidyl acrylate or glycidyl methacrylate and tert-butyl or amyl acrylate, or an emulsion obtained by copolymerizing styrene acrylate and acrylamide and then adding methylol Self-crosslinking emulsions and latexes such as emulsions obtained by oxidation can be used. Reactive synthetic resin emulsions and synthetic rubber latexes include acrylic resin emulsions, vinyl acetate resin emulsions, vinyl acetate-acrylic copolymer emulsions, vinyl chloride-vinyl acetate copolymer emulsions, SBR latexes, NBR latexes, CR latexes, etc. It is raised. These may be used alone or in combination of two or more. It is also possible to use these reactive synthetic resin emulsions and synthetic rubber latexes in combination with the non-reactive synthetic resin emulsions and synthetic rubber latexes.
In addition to the above-mentioned emulsions and latexes, solutions of synthetic resins and synthetic rubbers having the above-mentioned reactive groups dissolved in organic solvents or water can also be used in the same manner as the above-mentioned emulsions and latexes. <Compounds that crosslink by heating, ultraviolet rays, or electron beam irradiation> The following compounds can be used as compounds that crosslink by means such as heating, ultraviolet irradiation, or electron beam irradiation, but the present invention is not limited to these in any way. It's not a thing. ethylene glycol, propylene glycol,
Acrylic acid or methacrylic acid and aliphatic polyhydric alcohol such as butylene glycol, 1,6-hexanediol, neopentyl glycol, polyethylene glycol, polypropylene glycol, trimethylolpropane, trimethylolmethane, glycerin, pentaerythritol, dipentaerythritol, etc. Isocyanurate derivatives such as triallyl isocyanurate and tris(2-methacryloyl, oxyethyl)-isocyanurate; bisphenol A epoxy resin, phenol novolak epoxy resin, cresol novolak epoxy Acrylic modified epoxy resin obtained from an epoxy compound having at least two or more epoxy groups in one molecule of resin etc. and an unsaturated monobasic acid; a polyvalent cycloacetal compound and a glycol unsaturated monocarboxylic acid monoester or polyvalent Unsaturated cycloacetal resin, which is a reaction product with alcohol unsaturated monocarboxylic acid ester monool; acrylic modified polyester resin such as oligoester acrylate; acrylic modified polyurethane resin; unsaturated polyester resin; diallyl phthalate, etc. They may be used alone or in combination. Furthermore, monofunctional monomers such as styrene monomers, methacrylic acid ester monomers, and acrylic ester monomers may be used in combination with the above-mentioned polyfunctional compounds as reactive thinning agents. The amount of the polyfunctional compound added is preferably 10 to 100 parts by weight per 100 parts by weight of the resin. <Weight initiator, catalyst> As the weight initiator, commonly used ones can be used. For example, methyl ethyl ketone peroxide, cyclohexanone peroxide, t-butyl hydroperoxide, cumene hydroperoxide, di-t-butyl peroxide,
t-Butylcumyl peroxide, dicumyl peroxide, 2,5-dimethyl 2,5-di(t-
butylperoxy)hexane, 2,5-dimethyl2,5-di(t-butylperoxy)hexane,
1,3-bis(t-butylperoxyisopropyl)benzene, 1,1-bis(t-butylperoxy)3,3,5-trimethylcyclohexane,
n-butyl 4,4-bis(t-butylperoxy)valate, benzoyl peroxide, p-
Organic peroxides such as chlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, t-butyl peroxybenzoate, and t-butyl peroxyisopropyl carbonate are common, and these can be used alone or in combination of two or more. and use it. Further, as the catalyst, amines such as dimethylaniline and dimethyl para-toluidine, and metal compounds such as cobalt naphthenate and zinc naphthenate are generally used. The appropriate amount of the polymerization initiator added is 0.5 to 10% by weight of the polyfunctional compound. <Photosensitizer> As the photosensitizer, commonly used ones can be used. For example, benzoin, α-methylbenzoin, α-allylbenzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, benzoin isobutyl ether, acetophenone, benzophenone, p-bromobenzophenone, 4.4' -tetramethyldiaminobenzophenone, diphenyl disulfide, benzyl, etc., and these can be used alone or in combination of two or more. The amount of photosensitizer added depends on the amount of the polyfunctional compound.
0.5% to 10% by weight is suitable. Further, when the polyfunctional compound is crosslinked by electron beam irradiation, it is not necessary to use a photosensitizer or the like. <Crosslinking agent> In addition to the above polyfunctional compounds, halogenated synthetic resin compositions, such as vinyl chloride resin, copolymers of vinyl chloride and vinyl acetate, ethylene, alkyl ethers, acrylic esters, methacrylic esters, etc., vinylidene chloride When using a synthetic resin composition such as resin or chloroprene rubber, 2-dibutylamino-4,6-dithiocyanuric acid, 2-dicyclohexylamino-4,6-
Dithiocyanuric acid, 2-dibenzylamino-4.
6-dithiocyanuric acid, 2-diphenylamino-
4,6-dithiocyanuric acid, 2-anilino-4.
A crosslinking agent such as 6-dithiocyanuric acid or a metal salt of such a dithiocyanuric acid derivative, and, if necessary, an acid acceptor such as magnesium oxide, calcium oxide, zinc oxide, barium oxide, lead oxide, calcium carbonate, and the like. It is also possible to add a crosslinking accelerator or the like. The amount of the crosslinking agent added is preferably 0.5 to 20 parts by weight based on 100 parts by weight of the halogenated synthetic resin. As a crosslinking agent that is added to synthetic resin emulsion or synthetic rubber latex as necessary, initial condensates of melamine and urea are used, but the present invention is not limited to these in any way. do not have. <Fillers with excellent heat resistance> Inorganic and/or organic fillers with excellent heat resistance are basically those that do not undergo physical or chemical changes such as melting or decomposition at processing temperatures. You can use anything, but here is an example. Calcium carbonate, magnesium carbonate, clay, talc, silica, diatomaceous earth, silica sand, pumice powder, slate powder, mica powder, asbestos, aluminum hydroxide, aluminum oxide, aluminum sulfate, barium sulfate, calcium sulfate, glass bulbs, foaming Inorganic fillers such as glass bulbs, fly ash bulbs, volcanic glass hollow bodies (shirasu balloons), powdered cellulose (cellulose padder), polyvinyl alcohol fibers, cork powder, wood powder, thermosetting resin powder, thermosetting resin hollows Organic fillers such as spheres can be used. <Chemical foaming agent> As the chemical foaming agent used in the present invention, commonly used chemical foaming agents can be used, and examples thereof are listed below. N・N′-dinitrosopentamethylenetetramine, N・N′-dimethyl-N・N′-dinitrosoterephthalamide, azodicarbonamide, azobisisobutyronitrile, benzelsulfonylhydrazide, P・P′-oxybis (benzenesulfonylhydrazide), benzene-1,3-disulfonylhydrazide, toluenesulfonylhydrazide, etc. can be used. <Foam stabilizer> When forming a foam layer by mechanical foaming, it is preferable to use a foam stabilizer, but any commonly used foam stabilizer can be used, such as methylsiloxane emulsion. , methylsiloxane, silicone foam stabilizers such as xylene solutions, fluorine foam stabilizers, fatty acid condensates, alkylaryl sulfonates, metal soaps of oleic acid and ricinoleic acid, guanidine salts, quaternary ammonium compounds, aldehydes. Condensation products of amines and the like are used. <Viscosity modifier> Viscosity modifiers are broadly classified into thinners and thickeners.
As the viscosity reducing agent, commonly used ones can be used, examples of which are listed below. If the liquid synthetic resin composition is an oil dispersion system such as vinyl chloride resin plastisol or a solution of synthetic resin or synthetic rubber dissolved in an organic solvent, gasoline, octane, benzene, toluene, xylene, naphtha, dodecylbenzene derivatives, methyl ethyl ketone, Volatile diluents such as methyl isobutyl ketone, various surfactants, etc. are used, and when the liquid synthetic resin composition is an aqueous dispersion system such as a synthetic resin emulsion, synthetic rubber latex, or an aqueous solution of synthetic resin or synthetic rubber, Alcohols such as water, methanol, ethanol, and isopropyl alcohol are used. Alternatively, commonly used thickeners can be used, examples of which are listed below. When the liquid synthetic resin composition is an oil dispersion system as described above, metal soaps such as aluminum stearate, aluminum oleate, zinc stearate, silica, bentonite, polymerized oil, etc.
When the liquid synthetic resin composition is an aqueous dispersion system as described above, silica, bentonite, chemically modified precipitated calcium carbonate, ammonium salts of polymeric organic acids,
Water-soluble acrylic polymer, acrylic emulsion copolymer, crosslinked acrylic emundion copolymer, ammonium, polymethacrylate, ammonium polyacrylate, sodium polyacrylate,
Modified sodium polyacrylate, partially oxidized polyacrylic ester, methyl cellulose, carboxyl methyl cellulose, hydroxyethyl cellulose, cellulose sodium glycolate, polyvinyl alcohol, ammonia water, etc. can be used. When adjusting the viscosity of a liquid synthetic resin composition to a viscosity suitable for processing, these viscosity modifiers are added in an appropriate amount as necessary. (Examples) Examples are given below to explain the present invention in more detail, but the present invention is not limited to these Examples. <Formulation Examples> Typical formulation examples and comparative formulation examples of liquid synthetic resin compositions for forming the heat-resistant synthetic resin layer 2 are shown in the table below.
1. Table 2 shows typical blending examples of the vinyl chloride resin composition for forming the soft synthetic resin intermediate layer 3, and further shows typical formulation examples of the vinyl chloride resin composition for forming the soft synthetic resin top layer 4. Examples of formulations are listed in Table 3.

【table】

【table】

[Table] Example 1 Apply the ethylene-vinyl acetate copolymer emulsion of Formulation Example 1 on a coarse glass fiber with a fiber structure of 0.22 m/m using a doctor knife so that the total thickness after drying becomes 0.4 m/m. Apply with a coater and heat in a heating furnace.
Heat and dry at 140°C for 5 minutes to form a heat-resistant synthetic resin layer, cool and then roll up. Then, 0.5% of the vinyl chloride resin paste of Blend Example 2 was applied to the surface opposite to the coated surface of the ethylene-vinyl acetate copolymer emulsion.
After coating with a thickness of m/m and heating and solidifying in a heating oven at 180°C for 1 minute, a predetermined pattern was printed on this surface using a gravure printer, and then Formulation Example 3 was applied to this surface.
PVC resin paste was applied to a thickness of 0.3 m/m, heated and foamed in a heating oven at 200°C for 3 minutes,
A flooring material was created by winding it up after cooling. The heat-resistant synthetic resin layer formed from the above ethylene-vinyl acetate copolymer emulsion is
Even when it came into contact with a support heated to .degree. C., it did not stick to the support and easily passed through the heating furnace, yielding the above-mentioned flooring material. This flooring material was attached to plywood using a synthetic rubber latex adhesive, dried for about a week, and then peeled off. As a result, it was confirmed that the thin layer of the heat-resistant synthetic resin layer could be left behind on the base and could be removed. . Also, cut this flooring material into a size of 200m/m x 200m/m, paste it on a 300m/m x 300m/m plywood board using a synthetic rubber latex adhesive, and leave it at room temperature for 7 days. After drying, we left the flooring at a temperature of 70℃ for 200 hours and observed whether or not the flooring material had warped. As a result, no warping was observed, and this flooring material is necessary as a removable flooring material. It was confirmed that it has the same basic performance. The test results are shown in Table-4. Comparative Example 1 The ethylene-vinyl acetate copolymer emulsion of Comparative Formulation Example 1 was coated on glass fiber paper with a coarse fiber structure of 0.22 m/m using a doctor knife coater so that the total thickness after drying was 0.3 m/m. The resin layer is applied by heating and drying in a heating oven at 80°C for 10 minutes to form a synthetic resin layer, and after cooling, it is rolled up. Then, the vinyl chloride resin paste of Formulation Example 2 was applied to the surface opposite to the applied surface of the ethylene-vinyl acetate copolymer emulsion to a thickness of 0.55 m/m using a doctor knife coater, and heated to a thickness of 180 m/m in a heating furnace. When attempting to solidify by heating at ℃, the synthetic resin layer formed from the ethylene-vinyl acetate copolymer of Comparative Formulation Example 1 was heated to 180℃ in the heating furnace.
When it came into contact with a support heated to .degree. C., it stuck to the support, and it was not possible to cut it in a heating furnace to obtain the desired flooring material. Comparative Example 2 The vinyl chloride resin paste of Formulation Example 2 was coated on 0.8 m/m asbestos paper with a thickness of 0.3 m/m using a doctor knife coater, and after solidifying by heating at 180°C for 1 minute in a heating furnace, After printing a predetermined pattern on this surface using a gravure printing machine, the vinyl chloride resin paste of Formulation Example 3 was applied to a thickness of 0.30 m/m using a doctor knife coater, and heated to 200°C in a heating furnace.
The material was heated for 3 minutes to create a flooring material. As a result of testing the removability of this flooring material in the same manner as in Example 1, it was found that a thick asbestos layer remained partially on the base.
The base was so uneven that it was impossible to construct a flooring material on top of it, and it could not be said to be a removable flooring material.

[Table] (Effects) In the present invention, by coating and impregnating the fibrous base material 1 with a liquid synthetic resin composition, the fibrous base material 1 is integrated with the liquid synthetic resin composition, and further, the fibrous base material 1 is integrated with the liquid synthetic resin composition. The method of solidifying the liquid synthetic resin composition is by heating, ultraviolet irradiation, or electron beam irradiation, and since there is almost no internal distortion during processing, it is difficult to use the flooring material as described in Japanese Patent Publication No. 47-41848 in practical use. There are no problems such as delamination between layers or deterioration of the dimensional stability of the flooring material due to internal strain during bonding of the soft plastic layer with a dense structure containing a large amount of filler. Furthermore, as a liquid synthetic resin composition to be applied and impregnated onto the fibrous base material 1, it can be used as an adhesive for flooring construction to adhere to the base to such an extent that no peeling occurs during practical use, and when the flooring material is to be peeled off, The flooring is made of a material that peels off in such a way that the thin layer of the heat-resistant synthetic resin layer 2 remains on the base together with the adhesive when the heat-resistant synthetic resin layer 2 obtained by solidifying the liquid synthetic resin composition is destroyed. There are no problems such as peeling of the material during practical use. In addition, the laminated flooring material of the present invention has the advantage that, compared to conventional flooring materials based on asbestos sheets, a large amount of the base material does not remain on the surface of the flooring material, and re-installation is easy. It is something that plays.

[Brief explanation of drawings]

The figure is an enlarged sectional view showing an embodiment of the present invention. 1... Fibrous base material, 2... Heat resistant synthetic resin layer,
3... Soft synthetic resin intermediate layer, 4... Soft synthetic resin top layer, 5... Printing layer.

Claims (1)

[Scope of Claims] 1. A heat-resistant synthetic resin layer with a thickness of 0.5 m/m or less obtained by coating and impregnating a liquid synthetic resin composition on one side of a fibrous base material and solidifying it, and on the other side. This is a laminated flooring material in which a soft synthetic resin intermediate layer and a soft synthetic resin top layer are sequentially laminated, and the heat-resistant synthetic resin layer is formed by applying a thin layer to the adhesive on the base side when the laminated flooring material is peeled from the base material. A laminated flooring material characterized by a layer that remains attached to the layer and breaks down.