JPS6332915B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet flooring with improved cigarette flame resistance.

Conventionally, synthetic resin flooring has been mainly manufactured by processing polyvinyl chloride (hereinafter abbreviated as PVC), and is a so-called cushion floor, a surface layer consisting of a foamed PVC layer, a patterned layer, and a transparent PVC layer laminated in sequence on asbestos felt. Flooring materials that do not contain fillers, PVC sheets with a relatively small amount of filler on the surface, vinyl-asbestos tiles or granules that contain a large amount of filler are introduced through the stencil opening to form an inlaid pattern. There are inlaid flooring materials that are molded under heat and pressure, but there are cases where the surface layer of the flooring material does not contain any filler or contains only a relatively small amount of filler, and cases where it contains a large amount of filler and are resistant to tobacco. Even in cases where improvement in fire resistance is expected, the surface of the flooring material becomes charred due to smothering of cigarette burns on the surface of the flooring material, or when it is left unattended, leaving dark brown scorch marks, which poses an aesthetic problem.

Various solutions to this problem are possible, and the surface
Methods of cross-linking the PVC resin layer or coating it with urethane resin have been considered, but although these methods are effective to some extent in extinguishing cigarette burns, they are weak and carbonize when left unattended and become unsightly.

Furthermore, even if a highly thermally conductive layer is provided together with the heat-resistant resin layer, nicotine penetrates through the surface of the flooring material and becomes colored, which cannot be easily removed.

In addition, sufficient cigarette flame resistance cannot be obtained simply by laminating a polyester film on the surface of the flooring material.

The present invention solves the above problems and is durable.
To provide a sheet flooring material with improved cigarette flame resistance that maintains its aesthetic appearance for a long time.

In the present invention, dithiol-
Providing a polyvinyl chloride crosslinked resin layer crosslinked by adding S-triazine, trithiocyanuric acid, dimercaptothiadiazole and derivatives thereof,
A nicotine antifouling layer is laminated on the surface of the crosslinked resin layer, and is made of a film selected from the group consisting of polyester, tetrafluoroethylene, isotactic polypropylene, polyacetal, polyamide, and a reaction polymer of saturated copolyester and melamine. The gist is a sheet flooring material with improved cigarette flame resistance that is characterized by: This will be explained below based on the drawings.

FIG. 1 is a diagram showing the principle of the sheet flooring material of the present invention.

1 is a layer with high thermal conductivity, 2 is a heat-resistant resin layer, and 3 is a nicotine antifouling layer.

Layer 1 with high thermal conductivity is made of aluminum, copper, iron,
Examples include zinc or lead metal sheets, metal foil sheets, metal foil ribbons, plating or metal vapor deposited films, and metal powder layers.

A major feature of the present invention is that the highly thermally conductive layer 1 is used as a constituent component of the flooring material, and that the layer improves the efficiency of heat dispersion and prevents significant local temperature rises. Commercially available metal foils and films with sufficient thickness can be used.

The heat-resistant resin layer 2 is a PVC crosslinked resin and is provided on the above-mentioned layer with high thermal conductivity. The heat-resistant resin layer 2 usually refers to a resin layer that does not soften or break even when exposed to a high-temperature heat source.

As a crosslinking method for PVC, dithiol-S-
This can be easily carried out by adding and heating triazine, trithiocyanuric acid, dimethylcaptothiadiazole, and derivatives thereof.

Furthermore, since these resins have a high softening point, they are not easily deformed. The heat-resistant resin layer may be transparent, colored like a marble pattern, or a translucent sheet.

The thickness of the heat-resistant resin layer 2 is suitably 0.1 to 1 m/m.

In the case of conventional heat-resistant flooring materials, nicotine from cigarettes penetrates through the surface layer, leaving stains on the surface of the flooring material that cannot be easily removed.In contrast, in the present invention, the nicotine stain-proofing layer 3 is applied to the surface of the PVC cross-linked resin layer. Because it is laminated, nicotine does not permeate through the surface of the flooring material and contaminate it, ensuring a beautiful surface condition at all times.
The nicotine antifouling layer is made by coating a mixture of films such as polyester such as polyethylene terephthalate, polytetrafluoroethylene (hereinafter abbreviated as Teflon), isotactic polypropylene, polyacetal, polyamide, etc., and solutions of saturated copolymerized polyester and melamine. The polymer film obtained as a result of the reaction is also suitable as the nicotine antifouling layer of the present invention. The saturated copolymerized polyester is a condensation polymer of terephthalic acid, sebacic acid, and ethylene glycol. The antifouling layer is preferably a film made of a high crystalline polymer with a high melting point, with little branching, and with no large substituents or with regular arrangement even if there are.

Even more surprisingly, in the present invention, the nicotine antifouling layer is not damaged even if a cigarette is left unattended because heat does not accumulate due to the highly thermally conductive layer 1.

FIG. 2 is a diagram of the flooring material of the present invention in which a base material is formed on the lower surface of a highly thermally conductive layer. 1 is a layer with high thermal conductivity, 2 is a heat-resistant resin layer, 3 is a nicotine antifouling layer, 4
is the base material. Examples of the highly thermally conductive layer 1 include thin metal plates of aluminum, copper, iron, zinc, and lead, metal foil sheets, metal foil ribbons, plating or metal vapor-deposited films, and metal powder layers.

The heat-resistant resin layer 2 and the nicotine antifouling layer 3 are the same as those shown in FIG.

Examples of the base material 4 include synthetic resin sheets such as PVC, polyethylene, and polypropylene, scrims, asbestos felt, glass mats, other woven fabrics, nonwoven fabrics, and laminates of synthetic resins, woven fabrics, and nonwoven fabrics. Any substrate may be used as long as it can achieve the purpose of providing dimensional stability and weighting. Note that each of the above layers is preferably laminated with an adhesive made of polyester and isocyanate having terminal hydroxyl groups, and this adhesive is particularly suitable for adhering PVC to metal foil, polyester, polyamide, or the like.

The sheet flooring material of the present invention has a layer with high thermal conductivity.
A PVC cross-linked resin layer is formed, and a nicotine antifouling layer is formed on the surface of the cross-linked resin layer, so heat does not collect locally. Therefore, the heat-resistant resin layer is not exposed to more heat than would cause deformation or discoloration. The nicotine antifouling layer prevents nicotine from penetrating into the surface of the flooring material when a cigarette is left unattended.

Figures 3 and 4 show flooring materials of the present invention in which a pattern layer is interposed. 1 is a layer with high thermal conductivity, 2 is a heat-resistant resin layer, 3
4 is a nicotine antifouling layer, 4 is a base material, and 5 is a pattern layer.

The heat-resistant resin layer 2 is a transparent crosslinked PVC resin.
As a cross-linking method for PVC, Japanese Patent Publication No. 52-9463 uses trithiocyanuric acid, Japanese Patent Publication No. 12215-1987 uses dithiol-S-triazine, 2, 5-
The method of JP-A-55-137146 using dimercapto-1,3,4-thiadiazole, and other JP-A-56-137146 methods
The method described in No. 26943 is suitable.

In FIG. 3, the pattern layer 3 may be printed using conventional acrylic ink or PVC paste colored ink by a known method such as gravure printing or screen printing. Such a patterned layer may contain a sheet to the extent that it blocks the color of the highly thermally conductive layer located below it.

In the flooring material of the present invention, the pattern layer can be seen through the surface,
Not only can the interior material exhibit sufficient flexibility, but also good results can be obtained without affecting whether a cigarette is blown out or left unattended.

In the present invention, even if the pattern layer is a foamed resin layer using a combination of a nicotine antifouling layer, a heat-resistant resin layer, and a heat conductive layer, the foaming ratio is set to 6 times or less, and the cigarette flame resistance is still remarkable. FIG. 4 shows a flooring material of the present invention in which the pattern layer is partially a foam layer. In the present invention, an uneven pattern 5a caused by a change in the foamed layer and the non-foamed layer or the foaming ratio,
5b is obtained.

As mentioned above, the expansion ratio is preferably 6 times or less, and the thickness of the convex portions of the pattern layer is preferably 2 mm or less.

The foaming method may be a method in which a foaming agent is mixed with PVC paste and heated, or a foam formed by mechanical foaming may be used. As an example of obtaining a three-dimensional pattern, the convex portion 5a
The concave portions 5b and 5b are obtained by transfer-printing a foamable paste pregel sheet with an ink that does not contain a foaming inhibitor and an ink that does contain a foaming inhibitor, and then heating and foaming the sheet.

Furthermore, as one of the embodiments of the present invention, the fifth
As shown in the figure, it is also possible that the pattern layer also serves as a heat-resistant resin layer. In Figure 5, the base material 4
A highly thermally conductive layer 1 is laminated thereon, and a patterned heat-resistant resin layer 2 is formed by thick application of ink using a screen or an inlay method using a stencil, and a nicotine antifouling layer 3 is formed on the surface.

As described above, in the present invention, at least a layer with high thermal conductivity, a heat-resistant resin layer, and a nicotine antifouling layer on the surface are formed. The heat-resistant resin does not deform due to heat, and the nicotine antifouling layer prevents nicotine from penetrating into the flooring material.

Also, the highly thermally conductive layer disperses heat, so
The heat-resistant resin layer and nicotine antifouling layer were not damaged by cigarette fire. Particularly suitable for the nicotine antifouling layer are polyester films, Teflon, polyamides, isotactic polypropylene, polyacetals, and films of reaction polymers of saturated copolyester polyester and melamine.

Furthermore, as an embodiment of the present invention, good cigarette flame resistance can be obtained even when the heat-resistant resin is made transparent and a pattern layer is interposed between the heat-resistant resin and a layer with high thermal conductivity, and conventionally printed patterns can be seen through. Although noticeable stains caused by cigarette burns were observed in the fabricated flooring material, such defects were completely eliminated by the present invention.

Furthermore, even if foamed parts are provided in the pattern layer, contrary to the conventional wisdom that flooring materials containing foamed layers are susceptible to heat, no disadvantages have been found in terms of effectiveness, and in fact, it has improved flame resistance and three-dimensional decoration. It became possible to have both sexes.

Of course, it is also effective in preventing migration of plasticizers and preventing contamination from rubber feet of casters and furniture.

Example 1 On a highly thermally conductive layer of aluminum foil
A 0.5 mm thick sheet made by blending 100 parts of PVC with 30 parts by weight of filler, 50 parts by weight of plasticizer, 3.0 parts by weight of methyl acrylate, 0.5 parts by weight of benzoyl peroxide, and an appropriate amount of pigment and kneading with heat is used as a heat-resistant resin layer. A polyester film is laminated with a hydroxyl-terminated polyester-isocyanate adhesive.

Example 2 A highly thermally conductive layer of aluminum foil was formed on a base material with a PVC layer of 0.5 mm formed on the bottom surface of a glass mat, and a foaming agent-containing PVC paste was applied about 0.1 mm underlayer to gel and suppress foaming. The pattern printed by separating the ink containing the agent and the ink not containing the agent is transferred to the gelled PVC layer, and then the pattern is printed on the gelled PVC layer.
A paste prepared by adding 100 parts by weight of a plasticizer and 5 parts by weight of 1-anilino-3.5-dimercaptotriazine to 100 parts of PVC is applied to a thickness of 0.5 mm, and this is gelled to form a heat-resistant resin layer.

Thereafter, a polyester film was laminated on the heat-resistant resin layer in the same manner as in Example 1, and the entire sheet obtained was heated at 160°C to decompose the foaming agent so that the pattern layer was about 0.3 mm. get.

Example 3 A mixture of a melamine solution and a saturated copolymerized polyester resin solution consisting of terephthalic acid and ethylene glycol was coated on the heat-resistant resin layer described in Example 2 to a thickness of about 0.1 mm, and the entire sheet obtained was coated. is heated at 160° C. to decompose the foaming agent and at the same time form a nicotine antifouling layer of a cured polymer film to obtain the sheet flooring material of the present invention.

Example 4 Copper foil was laminated on the base material of Example 2, and a paste with the same composition as the heat-resistant resin of Example 2 was colored on the top surface, and a 1 mm thick pattern layer was formed using a screen machine.
Crosslinking is carried out by heating at ℃ to form a pattern layer and a heat-resistant resin layer. A Teflon film is laminated on the heat-resistant resin layer to obtain a sheet flooring material of the present invention.

None of the obtained sheet flooring materials of the present invention in Examples 1 to 4 was damaged by putting out a cigarette or being left unattended, and was not contaminated by nicotine at all.

Example 5 The antifouling layer in Example 1 was changed to isotactic polypropylene.

Example 6 The antifouling layer in Example 1 was changed to polyamide.

Example 7 The antifouling layer in Example 1 was changed to polyacetal.

Examples 5 to 7 also prevented staining due to nicotine,
Good cigarette flame resistance was obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the flooring material of the present invention. Figure 2 shows the floor material of the present invention in which a base material is formed on the lower surface of a highly thermally conductive layer, Figures 3 and 4 show the floor material of the present invention in which a pattern layer is interposed, and Figure 5 shows a heat-resistant resin layer. This is a flooring material that also has a patterned layer. 1 is a layer with high thermal conductivity, 2 is a heat-resistant resin layer, 3 is a nicotine antifouling layer, 4 is a base material, and 5 is a pattern layer.

Claims (1)

[Claims] 1. A polyvinyl chloride crosslinked resin layer crosslinked by adding dithiol-S-triazine, trithiocyanuric acid, dimercaptothiadiazole, and derivatives thereof is provided on a highly thermally conductive layer, and the crosslinked On the surface of the resin layer, one of the group of reactive polymers of polyester, tetrafluoroethylene, isotactic polypropylene, polyacetal, polyamide, and saturated copolymerized polyester and melamine is added.
A sheet flooring material with improved tobacco fire resistance characterized by a laminated nicotine antifouling layer consisting of two films. 2. The sheet flooring material according to claim 1, wherein a pattern layer is formed between the highly thermally conductive layer and the heat-resistant resin layer. 3 The pattern layer has a foaming ratio of 6 on the entire surface or partially.
The sheet flooring material according to claim 2, which is a foamed resin layer having a foamed resin layer of not more than 2 times the size of the foamed resin layer.