JPH10159290A - Flame-retardant sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame-retardant sheet material, in which softening, deformation, combustion, etc., are not generated easily even when a lit-up cigarette, etc., are pushed against the surface of the sheet material. SOLUTION: A synthetic-resin thin layer 2 is formed on the front side, and a metallic thin layer 3 is stuck on the rear side by an adhesive layer. The synthetic-resin thin layer 2 is formed of a material selected from the group of polyvinyl chloride, a polyolefin resin, polyurethane, an acrylic resin, polyester, nylon and an ionomer resin and the metallic thin layer 3 of a material selected from the group of aluminum, copper, iron, stainless steel and a plated steel plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-ignitable sheet material. More specifically, it is a sheet material used for wallpaper, floor material, table cloth, fusuma paper, partition paper, etc., even if a lit cigarette or the like is pressed against the surface, the lit match is brought into contact. The present invention relates to a non-ignitable sheet material that does not easily cause softening, deformation, combustion, etc.

[0002]

2. Description of the Related Art Flame-retardant curtains and wallpapers are well known.
Although these materials are difficult to ignite, for example, when a lit cigarette or the like is pressed, the heat is not quickly diffused and a scorch is formed. In the case of a resin material, thermal contraction occurs. Such a phenomenon occurs on a daily basis in a sheet or a table cloth laid on the floor.

If only the function of difficult ignition is taken into consideration, it is conceivable to use the metal film as it is, but in that case, problems such as oxidation, corrosion and breakage of the metal film remain. Further, there is a problem that the selection range of the design is narrowed. That is, if a resin-based material is used, printing, embossing, foaming, etc., various design constructions are possible, whereas in the case of a metal film, such construction is difficult, and
Some viewers may experience a cold sensation, feel or discomfort.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. In a wallpaper, a floor material, a table cloth, or the like, the front side is formed from a synthetic resin thin layer, and the back side is formed from a metal thin layer. The formation suitably prevents an excessive rise in temperature on the front surface side as the use surface.

[0005]

The flame-retardant sheet material according to the present invention has a thin synthetic resin layer formed on the front side and a thin metal layer formed on the back side.

[0006] Therefore, even in the case of inadvertently contacting or pressing a lit cigarette or the like with a thin synthetic resin layer on the surface side of a wallpaper, a floor surface material, a table cloth, or the like,
The heat is transmitted and diffused in the thin metal layer on the back side, so that an excessive rise in temperature of the thin synthetic resin layer is prevented, and as a result, generation of burn marks and the like is prevented. As the synthetic resin thin layer, those subjected to various designs such as printing, embossing, and foaming can be used.

[0007] Among the fire-retardant sheet materials, the synthetic resin thin layer is formed of a fire-retardant sheet material selected from the group consisting of polyvinyl chloride, polyolefin resin, polyurethane, acrylic resin, polyester, nylon, and ionomer resin. In this case, since these resins are in the form of a film or a sheet, they can be easily laminated with a metal foil, and the adhesive can be conveniently used in wet lamination or dry lamination. Further, it is also possible to employ extrusion lamination of a synthetic resin thin layer and a metal foil that can be bonded using a polyolefin resin as required. Thereby, workability is improved.

[0008] The thin metal layer is an aluminum foil, a copper foil,
In the case of a non-ignitable sheet material formed from a material selected from the group of metals such as iron foil, plated steel sheet, and stainless steel sheet, since the thermal conductivity of these thin metal layers increases,
The heat dissipation effect improves when the synthetic resin thin layer is heated,
Deterioration of the synthetic resin thin layer can be effectively prevented. The heat dissipation effect increases as the thickness of the thin metal layer increases, but a minimum thickness of 7 μm is required to use the non-ignitable sheet material as a flexible film.

[0009] It is preferable that the synthetic resin thin layer and the metal thin layer are bonded to each other by an adhesive layer interposed therebetween, so that the adhesion between the two becomes strong. Adhesive layers, such as polyurethane-based, polyester-based, two-component curing-type adhesives, and acrylic- or vinyl acetate-based emulsion-type adhesives, which have heat resistance and do not easily melt, decompose, or foam Is desirable. Similar adhesives are also effective.

Further, in the case of a fire-resistant sheet material having a pressure-sensitive adhesive layer formed on the surface of the thin metal layer, it can be easily attached to a plate material such as plywood or a so-called particle board, a wall, a sliding door, a floor or the like. Can be.

[0011] In such a difficult-to-ignite sheet material, in the case where paper which is easy to delaminate is adhered to the surface of the thin metal layer, after the sheet is attached to the wall or the like, it is necessary to replace it after several years. In addition, the integrated sheet of the synthetic resin thin layer and the metal thin layer can be easily peeled off, and in addition, when the sheet material is newly replaced, the paper is flat and beautiful because the delaminated paper remains on the base. A good adhesive effect of the adhesive is exhibited, and when the sheet material on which the adhesive layer is formed is replaced, the adhesive effect of the adhesive is exhibited. It is a suitable base for attaching the integrated sheet with the above.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a sheet material according to the present invention.

FIG. 1 is a perspective view showing an embodiment of the sheet material of the present invention, FIG. 2 is a partial sectional view of the sheet material of FIG. 1, and FIG. FIG. 4 is a sectional view showing an embodiment, FIG. 4 is a sectional view showing still another embodiment of the non-ignitable sheet material of the present invention, and FIG. 5 is a schematic side view showing a heat resistance test apparatus.

In FIG. 1, reference numeral 1 denotes a wallpaper formed of a sheet material having difficulty in ignition, in which a thin synthetic resin layer 2 is formed on the front side and a thin metal layer 3 is formed on the back side. 4 is a design formed on the thin synthetic resin layer 2. This pattern 4
It is formed in advance on the surface of the synthetic resin thin layer 2 by printing.

As shown in FIG. 2, the wallpaper 1 has a thin synthetic resin layer 2 and a thin metal layer 3 joined via an adhesive layer 5. The synthetic resin thin layer 2 and the metal thin layer 3 are combined so that the heat is effectively diffused through the metal thin layer 3 when the sheet 1 is heated from the synthetic resin thin layer 2 side, which is the surface to be used. When bonding with the adhesive layer 5, a dry lamination method is used so that a gas layer is not formed between both layers.
It is desirable to adhere by a wet lamination method or, if necessary, an extrusion lamination method.

The synthetic resin thin layer 2 is formed of a resin film of polyvinyl chloride, polyolefin resin, polyurethane, acrylic resin, polyester, nylon or ionomer resin. The synthetic resin thin layer 2 has a pattern suitable for wallpaper formed by a known method.

The thin metal layer 3 is made of aluminum foil. Aluminum is suitable as a material for the thin metal layer 3 because it has high thermal conductivity and high ductility and is inexpensive compared to noble metals. Further, iron foil is preferable because it is extremely inexpensive, and copper foil is preferable for the same reason as aluminum foil.

The adhesive layer 5 has heat resistance, such as a polyurethane-based, polyester-based, two-component curing type adhesive, an acrylic-type or vinyl acetate-based emulsion type adhesive, and is easily melted or decomposed. Uses one that does not foam. A similar adhesive is also effective.

These adhesives are preferable because they do not easily generate gas components due to volatilization or evaporation by heating.

Further, by adding a flame retardant to the adhesive, the flame retardancy of the wallpaper 1 is further improved.

The above-mentioned fire-resistant sheet material 1 is not only a wallpaper but also
Floor materials, tablecloths, office desk sheets, sheets for decorating the surface of containers such as various boxes and thermos, book covers, cover sheets used for paulownia chests and mirror tables, surface materials such as bags, and automobiles including motorcycles It can be widely applied to sheet cover materials, carpets, mat covers, partitions, heating / cooling equipment and heat insulating materials for pipes.

The fire-retardant sheet material 11 shown in FIG. 3 is obtained by forming an adhesive layer 14 on the surface of the thin metal layer 3 of the fire-retardant sheet material of FIG. The sheet material 11 can be stuck on a wall or a floor as it is. Furthermore, it may be cut out into a desired shape and attached as a decoration to a window or wall of a kindergarten or the like.

The fire-retardant sheet material 21 shown in FIG. 4 has a paper 22 which is easily delaminated on the surface of the thin metal layer 3 of the fire-retardant sheet material of FIG. Further, an adhesive layer 23 is further formed.

According to such a fire-resistant sheet material 21, when the sheet is affixed to the wall or the like and is to be replaced several years later, for example,
The integrated sheet of the synthetic resin thin layer 2 and the metal thin layer 3 can be easily peeled off.
Since the two half layers remain, they are flat and beautiful, and the adhesive effect of the adhesive is exerted. Therefore, it is a suitable base for attaching a new integrated sheet of the synthetic resin thin layer 2 and the metal thin layer 3. .
Further, the paper 22 that is easily delaminated without providing the adhesive layer 23 may be attached to a wall or the like with an adhesive.

The pressure-sensitive adhesive layer 1 shown in FIG. 3 and FIG.
The fire-resistant sheet materials 11 and 21 having 4 and 23 are convenient to handle if release paper is adhered to the surfaces of the pressure-sensitive adhesive layers 14 and 23.

[0026]

EXAMPLE The heat resistance effect of an example of the sheet material of the present invention was tested. Hereinafter, this will be described.

Example 1 Polyethylene terephthalate having a thickness of 25 μm (manufactured by Toyobo Co., Ltd .;
T), a polyurethane-based dry laminating adhesive (E26)
0: manufactured by Dainichi Seika Co., Ltd., hereinafter referred to as PU)
A thin metal layer made of an aluminum foil having a thickness of 20 μm (manufactured by Showa Aluminum Co., Ltd .; hereinafter, referred to as Al) was laminated by a dry lamination method to produce a sheet of Example 1. 50mm width x 200 length from this sheet
Three mm test pieces were cut out.

Example 2 Three test pieces of the sheet of Example 2 were collected under the same conditions as in Example 1 except that the thickness of the Al foil was changed to 50 μm.

Example 3 A thin synthetic resin layer having a thickness of 50 μm
Three test pieces of the sheet of Example 3 were collected under the same conditions as in Example 1 except that the test piece was formed from polyvinyl chloride (hereinafter, referred to as PVC).

Example 4 Three test pieces of the sheet of Example 4 were collected under the same conditions as in Example 3 except that the thickness of the Al foil was changed to 50 μm.

Example 5 The procedure was carried out except that the means of attaching the synthetic resin thin layer and the metal thin layer was changed from a dry laminating adhesive to an acrylic adhesive (two-part curable BPS4891: manufactured by Toyo Ink Co., Ltd.). Under the same conditions as in Example 1, three test pieces of the sheet of Example 5 were collected.

Example 6 Three test pieces of the sheet of Example 6 were collected under the same conditions as in Example 5 except that the thickness of the Al foil was changed to 50 μm.

Example 7 Three test pieces of the sheet of Example 7 were sampled under the same conditions as in Example 5 except that the synthetic resin thin layer was changed from PET to PVC having a thickness of 50 μm.

Example 8 Three test pieces of the sheet of Example 8 were sampled under the same conditions as in Example 7 except that the thickness of the Al foil was changed to 50 μm.

(Comparative Example 1) Ryosara Kraft paper (manufactured by Tokai Pulp Co., Ltd.) of 75 g / m ^{2 was used} as it was as a sheet of Comparative Example 1, and three test pieces having a width of 50 mm and a length of 200 mm were cut out from this sheet. .

(Comparative Example 2) A vinyl acetate-based wet laminating adhesive (manufactured by Siden Chemical Co., Ltd .; hereinafter, referred to as AV) on the back surface of 75 g / m ² Ryoso Kraft paper (manufactured by Tokai Pulp Co., Ltd.). 20 μm thick Al
A thin metal layer made of foil (manufactured by Showa Aluminum Co., Ltd.) was laminated by a wet lamination method to produce a sheet of Comparative Example 2. Three test pieces having a width of 50 mm and a length of 200 mm were cut out from the sheet.

(Comparative Example 3) Polyethylene (L2340: manufactured by Asahi Kasei Corporation, hereinafter referred to as PE) as an adhesive layer on the back of 75 g / m ² of Ryoso Kraft paper (manufactured by Tokai Pulp Co., Ltd.) Was interposed so as to have a thickness of 15 μm, and a thin metal layer made of Al foil (manufactured by Showa Aluminum Co., Ltd.) having a thickness of 20 μm was laminated by extrusion lamination to produce a sheet of Comparative Example 3. Width 5 from this sheet
Three test pieces of 0 mm × 200 mm length were cut out.

Table 1 shows each of the above examples.

(Test Method) As shown in FIG. 5, a test piece T was placed on a plate P made of fluororesin (Teflon),
Is placed with its thin synthetic resin layer as its upper surface, and for Comparative Examples 1 to 3, its kraft paper is placed as its upper surface, and the angle of the lit cigarette C with respect to the horizontal plane is about 15 °. Was placed on the cigarette support plate S as described above and brought into contact with the synthetic resin thin layer of the test piece T or kraft paper.

Then, a cigarette fire was applied to each test piece for 6 hours.
0 seconds, 120 seconds, 180 seconds, 240 seconds, 300
After each contact for 2 seconds, for Examples 1 to 8, lightly wipe the surface of the synthetic resin thin layer where the fire of the tobacco contacted with absorbent cotton impregnated with methanol to remove the ash and tar of the tobacco, and then observe the surface did. Table 2 shows the results.

[0041]

[Table 1]

[0042]

[Table 2]

As is clear from Table 2, the fire of the cigarette was 1
Even after contacting for about 80 seconds, there was no significant change in the surface of the test piece. Actually, there is only one cigarette fire that touches the floor or wall.
It doesn't last as long as 80 seconds. This is because when tobacco falls on the floor, the tobacco is in contact with the floor over its entire length and is extinguished by the condensed moisture generated by the burning of the tobacco. This is because, in order to put out the fire, the contact is generally made artificially for a short time.

[0044]

According to the present invention, even in the case where a cigarette or the like which has been inadvertently brought into contact with a synthetic resin thin layer on the surface side of a wallpaper, a floor surface material, a tablecloth, or the like is pressed. The heat is transmitted and diffused in the thin metal layer on the back side, so that an excessive rise in temperature of the thin synthetic resin layer is prevented, and as a result, generation of burn marks and the like is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a sheet sheet material according to the present invention.

FIG. 2 is a partial cross-sectional view of the flame retardant sheet material of FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the flame-retardant sheet material of the present invention.

FIG. 4 is a cross-sectional view showing still another embodiment of the flame-retardant sheet material of the present invention.

FIG. 5 is a schematic side view showing a heat resistance test apparatus.

[Explanation of symbols]

 1, 11, 21 ... Fire-retardant sheet material 2 ... Synthetic resin thin layer 3 ... Metal thin layer 4 ... Pattern 5 ... Adhesive layer 14, 23 ...・ Adhesive layer 22 ・ ・ ・ ・ ・ ・ Paper

Claims (6)

[Claims] 1. A synthetic resin thin layer is formed on the surface side,
A non-ignitable sheet material with a thin metal layer adhered to the back side. 2. The method according to claim 1, wherein the synthetic resin thin layer comprises polyvinyl chloride,
Polyolefin resin, polyurethane, acrylic resin,
The flame-retardant sheet material according to claim 1, comprising a material selected from the group consisting of polyester, nylon, and ionomer resin. 3. The method according to claim 1, wherein the thin metal layer is made of aluminum, copper,
The flame-retardant sheet material according to claim 1, comprising a material selected from the group consisting of iron, stainless steel, and plated steel. 4. The fire-retardant sheet material according to claim 1, wherein the thin synthetic resin layer and the thin metal layer are joined by an adhesive layer interposed therebetween. 5. The sheet material according to claim 1, wherein an adhesive layer is formed on the surface of the thin metal layer. 6. The fire-retardant sheet material according to claim 1, wherein a paper that easily delaminates is attached to the surface of the thin metal layer.