JPH1199596A - Decoration material and noncombustible decoration material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stick a vinylchloride resin-containing decoration layer on a base layer at a low temperature for a short period of time not impairing the decoration layer thermally by containing a vinylchloride copolymer in an adhesive layer, and employing a silence compound as a fiber in the base layer to subsequently be surface-treated. SOLUTION: The decoration material 10 consists mainly of a base layer 1 containing a fiber, an on the surface of the base layer 1, a decoration layer 4 containing a vinylchloride resin is stuck via an adhesive layer 3 comprising a vinylchloride copolymer. A vinylchloride copolymer in the adhesive layer 3 preferably includes, as a polarized copolymeric unit, vinylalcohol, acrynitrile, acrylic acid, methacrylic acid, and maleic acid as sell as vinylacetate. As a fiber of the base layer 1, there is used a noncombustible fiber, and a silane compound given to the surface treatment of the fiber has an effect to raise an affinity between the fiber surface and the vinylchloride copolymer; if the silane compound is aminosilane, it is raised in particular.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a lightweight and highly durable decorative material useful as an interior material or an exterior material, and in another aspect, a surface test defined by JIS A 1321 The present invention relates to an improved non-combustible decorative material which can be recognized as "flame retardant class 1". The decorative material and nonflammable decorative material of the present invention can be widely and advantageously used, particularly in the field of construction.

[0002]

2. Description of the Related Art A fiber-containing base layer and one of the base layers have been conventionally used as interior or exterior materials for finishing a surface of a building such as a floor surface, a ceiling surface, and a wall surface. A decorative material comprising a decorative sheet adhered so as to cover two surfaces is known. Here, "cosmetic sheet"
The term includes both a decorative layer having a decorative surface such as printing and coloring on the front and / or back surface, and a decorative layer including such a decorative layer and an adhesive layer adhered thereto. It is.

[0003] When the decorative sheet covering the base layer consists only of a decorative layer, the decorative layer itself is made to be heat-bondable, and can be bonded to the base layer without requiring a separate adhesive layer. . Further, such a decorative material can be used also as a nonflammable decorative material when nonflammable fibers such as glass fibers are used as the fibers of the base layer. For example,
JP-A-7-189100 discloses a non-combustible interior material using a fluorine film having a softening point of 320 ° C. or lower as a decorative layer. The decorative layer of the interior material can be bonded to the base layer containing non-combustible fibers by the thermal bonding action of the fluorine film itself without requiring a separate adhesive layer. However, since the thermal bonding temperature of the fluorine film is about 280 ° C., thermal deterioration of the film is likely to occur due to high temperature application. Further, when a decorative material is produced using a decorative layer containing a resin having relatively low heat resistance, for example, a vinyl chloride resin, the bonding conditions disclosed in this publication cannot be used.

Further, Japanese Utility Model Laid-Open No. 5-51632 discloses that
A non-combustible wall covering sheet using a film made of a thermoplastic resin such as a fluororesin or a vinyl chloride resin as a decorative layer is disclosed. In the method disclosed in this publication as well, the fluorine film itself and the base layer are thermally bonded by the thermal bonding action of the fluorine film itself, similarly to the above method. However, the production conditions for producing a decorative material using a vinyl chloride resin film are not specifically disclosed, and only the case of a fluororesin film is mentioned.

That is, these conventional techniques do not specifically teach a method for producing a decorative material using a decorative layer containing a vinyl chloride resin having relatively low heat resistance. On the other hand, it is also known to manufacture a decorative material by bonding a decorative sheet formed by laminating a decorative layer containing a vinyl chloride resin and a thermal adhesive layer containing a thermoplastic resin to a base material containing fibers. ing. For example, Japanese Patent Application Laid-Open No. 57-107
No. 835 discloses a method for producing a composite decorative sheet in which a vinyl chloride resin film and a glass woven fabric base material are bonded via a colored layer containing a vinyl chloride resin. In the case of this method, the coloring layer containing the vinyl chloride resin functions as the heat bonding layer, but does not teach specific bonding conditions. In addition, Japanese Unexamined Patent Publication
JP-A-87349 discloses a method of bonding a decorative layer containing a resin such as a vinyl chloride resin to a woven glass cloth by previously impregnating the woven cloth with a thermosetting resin. A method is disclosed in which the adhesive is bonded at a relatively low temperature for a short time (about 140 ° C., 20 minutes).

[0006]

As described above, a decorative layer containing a vinyl chloride resin is usually bonded to a fiber-containing base layer via an adhesive layer (including an impregnated adhesive layer). However, in the prior art, the vinyl chloride decorative layer and the fiber-containing base layer can be formed at a low temperature (for example, 200 ° C. or less) and a short time (for example, less than 20 minutes) at which the decorative layer is not thermally damaged. An adhesive material capable of heat-bonding has not been specifically studied. In addition, although the impregnated adhesive layer can lower the bonding temperature, an amount of thermosetting adhesive capable of bonding the decorative layer and the base layer with sufficient adhesive force is applied to the small gaps between the fibers of the base layer. It is difficult to impregnate in advance and the decorative layer may be peeled off from the base layer during use of the decorative material.

That is, a first object of the present invention is to form a base layer containing fibers and a decorative layer containing a vinyl chloride resin at a low temperature and for a short time at a level at which the decorative layer is not thermally damaged. An object of the present invention is to provide a lightweight and highly durable cosmetic material that can be adhered with a sufficient adhesive strength. A second object of the present invention is a cosmetic material as described above,
An object of the present invention is to provide a non-combustible decorative material which can be recognized as the highest level, "flame retardant class 1", in a surface test defined by IS A1321.

[0008]

SUMMARY OF THE INVENTION The first object described above is intended to provide:
According to the present invention, 1) a base layer made of a fiber-containing material, 2) a decorative layer containing a vinyl chloride resin, and a heat-bondable adhesive layer adhered to the back surface of the decorative layer, wherein the adhesive layer A decorative sheet adhered to the surface of the base layer through the adhesive layer, wherein the adhesive layer contains a vinyl chloride copolymer, and the fibers of the fiber-containing material of the base layer are silane. This can be achieved by a cosmetic material characterized by being surface-treated with a compound.

According to the second object of the present invention, there is provided, according to the present invention, a) a base layer made of a non-combustible fiber-containing material, b) a decorative layer containing a vinyl chloride resin and a back surface of the decorative layer. A decorative sheet that includes a heat-bondable adhesive layer and is bonded to the surface of the base layer via the adhesive layer; and c) a pressure-sensitive adhesive layer that is adhered to the back surface of the base layer. The adhesive layer contains a vinyl chloride copolymer, the fibers of the non-combustible fiber-containing material of the base layer are surface-treated with a silane compound, and the thickness of the decorative sheet and the thickness of the pressure-sensitive adhesive layer Total is 30 to 120
It can be achieved by a non-combustible decorative material characterized in the range of μm.

[0010] The decorative material and the non-combustible decorative material according to the present invention will be described specifically and in detail in the section of “Embodiments of the Invention”.
The operation will be described below. The thickness of the decorative layer, the decorative sheet, etc., is described below. When the decorative layer includes a print layer, the thickness of the decorative layer includes the vinyl chloride resin layer and the print layer in the completed decorative material. The thickness of each layer (the decorative material, the adhesive layer, the pressure-sensitive adhesive layer, etc.) in the decorative material is the thickness in the completed decorative material.

[0011] In the decorative material of the present invention (hereinafter, also including nonflammable decorative materials, unless otherwise specified), the adhesive layer for bonding the decorative layer containing the vinyl chloride resin and the base layer made of the fiber-containing material is vinyl chloride. Since the base layer contains a copolymer and the fibers of the base layer are surface-treated with a silane compound, the decorative layer is at a low temperature (for example, 200 ° C. or lower) and at a short time (for example, 20 ° C. Minutes), the decorative layer and the base layer can be thermally bonded. Also,
The decorative layer and the base layer thus bonded are firmly bonded via the adhesive layer, and the decorative sheet (the laminate of the decorative layer and the adhesive layer) may be peeled off from the base layer during use of the decorative material. It is effectively prevented, resulting in high durability.

The vinyl chloride copolymer contained in the adhesive layer (hereinafter sometimes referred to as a “vinyl chloride copolymer”) is
Compared with the vinyl chloride resin used in the prior art, that is, the vinyl chloride homopolymer, the fluidity at the heat bonding temperature higher than the softening point of the copolymer is high, and the fibers between the base layer fibers in the heat bonding process are high. It can easily penetrate the gap. Thereby, the adhesive force between the adhesive layer and the base layer is increased. Further, the PVC copolymer has a high affinity with the vinyl chloride resin and also improves the adhesive strength between the decorative layer and the adhesive layer. Here, the “PVC copolymer” is a copolymer (binary or ternary or more copolymer) containing a vinyl chloride unit and one or more other copolymerized units in the molecule. . The vinyl chloride units are usually present in the range from 55 to 99 mol%, preferably from 70 to 97 mol%, particularly preferably from 80 to 95 mol%, based on the whole copolymer. In the case of the vinyl chloride copolymer, if the proportion of the vinyl chloride unit is too small, the adhesive strength with the decorative layer may decrease, while if it is too large, the adhesive strength with the base layer may decrease.

On the other hand, the silane compound used for the fiber surface treatment has the effect of increasing the affinity between the fiber surface and the PVC copolymer. Such an effect is particularly enhanced when the silane compound is an aminosilane compound (hereinafter, also sometimes referred to as “aminosilane”). This is because the vinyl chloride unit (and copolymer units other than vinyl chloride) in the PVC copolymer molecule has polarity, and the polar site and the amino group of aminosilane interact effectively. One of the copolymer units that can interact most effectively with aminosilanes is a vinyl acetate unit. That is, it is a vinyl chloride-vinyl acetate copolymer. Here, the “vinyl chloride-vinyl acetate copolymer” is a binary, ternary or higher copolymer containing a vinyl chloride unit and a vinyl acetate unit in the molecule. In such copolymers, the sum of vinyl chloride units and vinyl acetate units is usually in the range from 55 to 100 mol%, based on the entire copolymer.

The softening point of the PVC copolymer in the adhesive layer is preferably in the range of 80 to 180 ° C., particularly preferably in the range of 90 to 150 ° C. If the softening point of the adhesive layer is too low, the decorative sheet may be peeled off from the base layer during use of the decorative material, while if it is too high, the decorative layer may not be thermally damaged at a low temperature (for example, 200 ° C.). There is a possibility that thermal bonding in a short time (for example, less than 20 minutes) becomes difficult.

When the fibers of the fiber-containing material constituting the base layer are non-combustible fibers such as glass fibers, the present invention can provide a lightweight and highly durable non-combustible decorative material. Here, "non-combustible cosmetic material" is defined by JIS
A 1321 (1994) refers to a cosmetic material recognized as "flame retardant" in a surface test. And the highest rank in this test, namely, "Flame retardant 1
The non-combustible decorative material of the present invention, which can be certified as "grade", has the following structure: a base layer made of a material containing non-combustible fibers, and a surface of the base layer via an adhesive layer. It comprises a bonded decorative layer and a pressure-sensitive adhesive layer disposed on the back surface of the base layer, and the total thickness of the decorative layer, the adhesive layer and the pressure-sensitive adhesive layer is 30 to 1
It is a nonflammable decorative material having a range of 20 μm. The total thickness of the above three layers is the total thickness of the material other than the non-combustible base layer, that is, the total thickness of the combustible material layer, which is 120 μm.
If it exceeds, the nonflammability is reduced, and it is not recognized as “flame retardant class 1” in the above test. Since such a combustible material layer contains a relatively large amount of an organic polymer, it is likely to generate smoke and high-temperature gas when exposed to a flame. Therefore, the spread of fire can be effectively prevented by reducing the amount of the flammable material layer as much as possible. On the other hand, when the total thickness is less than 30 μm, the decorative sheet becomes extremely thin and handling becomes difficult, so that the heat bonding operation may be difficult. From such a viewpoint, the total thickness of the three layers of the decorative layer, the adhesive layer and the pressure-sensitive adhesive layer, that is, the total thickness of the decorative sheet and the pressure-sensitive adhesive layer is preferably in the range of 50 to 110 μm.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The decorative material according to the present invention can be embodied in various forms. If one preferable embodiment is specifically shown and described, it is possible to have a configuration as shown in FIG. 1, although it is not limited to the described one. As shown, the decorative material 10 is mainly composed of a base layer 1 made of a material containing fibers, and the surface of the base layer 1 is provided with an adhesive layer 3 made of a vinyl chloride copolymer. The decorative layer 4 containing a vinyl chloride resin is adhered. In the illustrated decorative layer 4, a printing layer 5 is applied in a predetermined pattern on the back surface (the side of the base layer 1). Further, the adhesive layer 3 and the decorative layer 4 can be collectively referred to as a decorative sheet 2. On the back surface of the base layer 1, that is, on the side opposite to the decorative sheet 2, an adhesive layer 6 is adhered with a release paper (also called a liner) 7. The release paper 7 can be peeled from the base layer 1 when the decorative material 10 is used.

In the illustrated decorative material 10, non-combustible fibers are used as the fibers of the base layer 1, and the total thickness of the decorative sheet 2 and the pressure-sensitive adhesive layer 6 is 30 to 120 μm.
When it is in the range of m, a nonflammable decorative material can be provided. The following is a description of the materials and constituent layers used in the above-described decorative material and other decorative materials, and the production of decorative sheets and decorative materials. [Vinyl chloride copolymer] The vinyl chloride copolymer of the adhesive layer is a copolymer containing a vinyl chloride unit and other copolymerized units in the molecule as described above. As the above-mentioned copolymer unit, ethylene, propylene, and the like can be used in addition to the vinyl acetate. Further, as the polar copolymerized unit, vinyl alcohol, acrylonitrile, acrylic acid, methacrylic acid, maleic acid, etc. are preferable in addition to the above-mentioned vinyl acetate. The weight average molecular weight of such a copolymer is usually in the range of 10,000 to 1,000,000. The softening point of the copolymer is usually 80 to 180.
° C, preferably in the range of 90-150 ° C. If the softening point of the copolymer is too low, the decorative sheet may be peeled off from the base layer during use of the decorative material, while if it is too high, the decorative layer may not be thermally damaged at a low temperature (for example, 200 ° C or lower). ) And in a short time (eg, less than 20 minutes). [Silane compound] As the silane compound as the surface treatment agent, for example, a silane coupling agent or a polysiloxane made of a polymer thereof can be used. Specific examples of such a silane coupling agent include aminosilanes such as γ-aminopropyltriethoxysilane, vinylsilanes such as vinyltriethoxysilane, and (meth) acrylsilanes such as γ-methacryloxypropyltrimethoxysilane. And epoxysilanes such as γ-glycidoxypropyltriethoxysilane.

The method for performing the surface treatment of the fiber is, for example, as follows.
It can be carried out by using a solution containing a silane compound, applying it to the fiber surface, and drying it. The adhesion amount of the silane compound is usually in the range of 0.05 to 5 parts by weight based on 100 parts by weight of the fiber. [Fibers] As the fibers of the fiber-containing material constituting the base layer, fibers such as glass fibers, carbon fibers, aramid fibers, and boron fibers can be used. Preferably glass fiber,
This is because, in the case of glass fiber, the affinity with the silane compound is particularly high, and it is particularly easy to increase the adhesive force between the decorative sheet and the base layer, and heat bonding in a short time of 30 seconds to 5 minutes is possible. This is because Also, because it is highly non-flammable,
It is also useful when the cosmetic material of the present invention is used as a nonflammable cosmetic material.

The density of the fibers is preferably in the range of 1.1 to 3.0. If the density is too high, it may be difficult to reduce the weight of the decorative material. Conversely, if it is less than 1.1, the mechanical strength of the decorative material may decrease, and the durability may decrease. [Base layer] The base layer is composed of the above-mentioned material containing fibers, and the fiber-containing material is not particularly limited as long as it is in a form containing the above-mentioned fibers.
The base layer is preferably in the form of a nonwoven fabric or a woven fabric from the viewpoint of reducing the weight of the decorative material. This is because these materials impart flexibility to the decorative material and improve processing and handling. The fibers contained in the base layer may be one kind alone or a mixture of two or more kinds, and may be a combination of noncombustible fibers and combustible fibers. However, when producing a non-combustible decorative material according to the present invention, it is preferable that the fiber is composed only of non-combustible fiber.

When the base layer is made of a woven or nonwoven fabric, its thickness is usually 50 μm or more. In the case of producing a nonflammable decorative material according to the present invention, the thickness of the base layer is usually 80 μm or more, preferably 150 μm to 1 mm. If the thickness of the base layer is too small, the mechanical strength may be reduced, and the durability may be reduced. Conversely, if the thickness is too large, the thermal bonding operation tends to be difficult. [Cosmetic Layer] The decorative layer is a layer containing a vinyl chloride resin and having a color or / and pattern observed from the surface of the decorative layer. Such a decorative layer includes, for example, a resin layer in which a vinyl chloride resin and a coloring material are mixed, and a printing layer provided on the surface or the back surface (the surface in contact with the adhesive layer) of the film containing the vinyl chloride resin. Things. When providing a printing layer on the film surface, even if the film is colored,
It may be uncolored and transparent. On the other hand, when a printing layer is provided on the back surface of the film, the film needs to be light-transmitting. This is because the printing layer needs to be observed through the film. The thickness of the decorative layer (including the print layer if it has one) is usually 10 to 300 μm. In addition, when imparting the above-described nonflammability to the decorative material, a decorative layer,
The total sum of the thicknesses of the adhesive layer and the pressure-sensitive adhesive layer is set in the range of 30 to 120 μm.
Therefore, the thickness of the decorative layer is preferably in the range of 10 to 90 μm, depending on the thickness of the other layers.

The printing layer may be provided after the decorative material is completed, but is preferably provided before the decorative sheet is adhered to the base layer. This is because the printing operation is easier when printing on a relatively thin decorative sheet or a resin film before the adhesive layer is laminated, than printing on a decorative material having a relatively large thickness. It is. The decorative sheet used in the present invention, as described above, can be bonded to the base layer at a low temperature and in a short time at a level at which the decorative layer is not thermally damaged. Also, there is no possibility that the printed layer is deformed or deteriorated in color.

The printing layer may be provided on the entire surface (or the back surface) of the resin film, or may be provided partially. In order to provide the printing layer, ordinary printing means, gravure printing, screen printing, or the like can be used. The thickness of the printing layer is not particularly limited, but is usually in the range of 0.1 to 30 μm. As the ink used for the printing layer, the same ink as that used for ordinary decorative materials can be used. For example, acrylic ink, vinyl chloride-vinyl acetate ink, and the like.

[Production of decorative sheet] The decorative sheet used in the present invention, that is, the laminate comprising the decorative layer and the adhesive layer can be produced, for example, as follows. First, on the surface of the carrier (temporary carrier),
A liquid containing a vinyl chloride resin is applied to form a coating film containing the vinyl chloride resin. When the used liquid is a solution or a dispersion, it is dried to form a film. Subsequently, a printing layer is provided on the surface of the coating film to form a decorative layer. Further, a liquid (melt, solution or dispersion) containing a PVC-based copolymer is applied so as to cover the printed layer, thereby forming a heat-bondable adhesive layer which is in close contact with the back surface of the decorative layer. After the formation of the adhesive layer, the carrier is removed to obtain a decorative sheet.

The solution or dispersion containing the vinyl chloride resin can be prepared by a usual method. For example, it is prepared by mixing or / and kneading a solid vinyl chloride resin with a solvent or a dispersion medium. As a mixing or kneading apparatus, for example, a high-speed mixer, a homomixer, a kneader, a planetary mixer, a sand mill and the like can be used. Also, a solution or dispersion containing a PVC copolymer can be prepared in the same manner.

As the liquid containing the vinyl chloride resin, a vinyl chloride sol may be used. Such a sol can be obtained as a liquid containing a reaction product prepared by suspension polymerization or emulsion polymerization of vinyl chloride.
The application of the liquid containing the vinyl chloride resin is performed by using a usual application means. Suitable application means are, for example, knife coat, bar coat, roll coat, extrusion coat and the like. In addition, a liquid containing a PVC copolymer can be applied in the same manner. Further, instead of the coating film on the carrier, a calender film formed separately can be used.

The thickness of the adhesive layer is not particularly limited as long as the adhesive layer can effectively adhere the base layer and the decorative layer. Usually, it is in the range of 5 to 100 μm, preferably 10 to 50 μm. If the thickness of the adhesive layer is too small, the adhesive strength may be reduced. Conversely, if the thickness is too large, the decorative material may be bulky and hinder weight reduction. When the nonflammability is imparted to the decorative material as described above, it is preferable to set the thickness of the adhesive layer to be in the range of 10 to 100 μm. In addition, as long as the effects of the present invention are not impaired, the decorative property of the decorative sheet can be enhanced by including a pigment or a dye in the adhesive layer.

On the other hand, an adhesive layer is provided on a carrier, a printing layer is provided thereon, and a coating film formed from a liquid containing a vinyl chloride resin is provided so as to cover the printing layer. It can be removed to obtain a decorative sheet. In this case, it is also possible to use a calender film instead of the vinyl chloride resin coating film, dispose the calender film on the print layer, and heat-laminate the laminate including the adhesive layer and the print layer.

Also, a printed layer may be provided on the surface of the decorative sheet (the surface of the vinyl chloride resin layer) as long as the effects of the present invention are not impaired. Furthermore, various additives may be contained in the layer containing the vinyl chloride resin, the adhesive layer, and the printing layer as long as the effects of the present invention are not impaired. Examples of such additives include antioxidants, plasticizers, UV absorbers,
Crosslinking agents, tackifiers and the like can be mentioned. [Manufacture of decorative material] The decorative material of the present invention is characterized in that, by using the decorative sheet described above, thermal damage (for example,
It can be easily manufactured while avoiding color deterioration and deformation.

First, an adhesive layer of a decorative sheet and a base layer are laminated, and the laminate is heat-laminated at a predetermined temperature and pressure to form a decorative material. The laminating temperature (thermal bonding temperature) is a temperature exceeding the softening point of the adhesive layer of the decorative sheet, but is usually 90 to 200 ° C, preferably 100 ° C.
~ 190 ° C. If the lamination temperature is too low, poor adhesion may occur, while if it is too high, the decorative layer may be thermally damaged.

The laminating pressure is usually 5 to 50 kgf / m
^2, preferably in the range of 10~40kgf / m ^2. If the pressure at the time of lamination is too low, poor adhesion may occur. Conversely, if it is too high, the decorative layer may be unnecessarily deformed and impair the appearance of the decorative material. The time required for lamination is usually within 20 minutes, preferably in the range of 30 seconds to 5 minutes. If the lamination time is too short, poor adhesion may occur, while if too long, the decorative layer may be thermally damaged.

On the other hand, a decorative material can be manufactured without using the decorative sheet as described above. For example, a heat bonding film to be a heat bonding layer is bonded to one surface of the base layer. At this time, it is preferable that the heat bonding film is bonded while partially penetrating the inside of the base layer. The free surface of the heat-adhesive film (the surface opposite to the adhesive surface with the base layer) and the decorative layer are heat-laminated to complete a decorative material. The cosmetic material completed in this way has a base layer,
The decorative sheet has a structure having a decorative sheet thermally bonded to the base layer via an adhesive layer, and the decorative sheet includes a decorative layer containing a vinyl chloride resin, and a heat-bondable adhesive adhered to the back surface of the decorative layer. Since it has an adhesive layer, the cosmetic material of the present invention
It can be considered as an embodiment.

The laminating operation is performed using, for example, two rolls that can be heated and pressed. The surface of these rolls may be flat, but an embossing roll having an uneven surface may be used. Thereby, embossing can be performed simultaneously with the bonding operation between the decorative sheet and the base layer. The back of the decorative material obtained as described above (the back of the base layer to which the decorative layer is not adhered)
Preferably, a pressure-sensitive adhesive layer is disposed on the second side. This allows
This is because the decorative material can be easily attached to a construction site such as a wall surface or a ceiling surface of a building. The pressure-sensitive adhesive layer has, for example, a pressure-sensitive adhesive layer coated on the release surface of a release film, a pressure-sensitive adhesive layer with a release film is separately prepared, and the pressure-sensitive adhesive layer and the base layer are dry-laminated. Deploy. Specific examples of the pressure-sensitive adhesive include an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive. Further, it is preferable that the pressure-sensitive adhesive contains elastic microspheres so as to exhibit removability and easy workability.
Further, in order to enhance ease of workability, it is preferable that the surface of the pressure-sensitive adhesive in contact with the release film has irregularities of a predetermined geometric shape. The formation of such irregularities is performed, for example, such that the release surface of the release film has projections and depressions of a predetermined geometric shape, an adhesive solution is applied to the release surface, and the adhesive layer is dried. Can be easily formed.

The thickness of the pressure-sensitive adhesive layer is not particularly limited, but is usually in the range of 10 to 200 μm. On the other hand, when imparting the above-mentioned nonflammability to the decorative material, the thickness of the pressure-sensitive adhesive layer is preferably in the range of 10 to 100 μm. Various additives may be contained in the above-mentioned pressure-sensitive adhesive layer as long as the effects of the present invention are not impaired. Examples of additives that can be used include antioxidants, plasticizers, ultraviolet absorbers, crosslinking agents,
Tackifiers and the like can be mentioned.

The total thickness of the decorative material or the non-combustible decorative material is not particularly limited, but is usually in the range of 100 μm to 10 mm.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to embodiments. It should be understood that the present invention is not limited to these examples. The softening point of VYHH used in the following examples is a value measured as follows. First, a polymer film (width 25 mm, length 7
A sample having a thickness of 0 mm and a thickness of 50 μm) is formed. Subsequently, the sample is sandwiched between two clips, the distance between the clips is adjusted to be 50 mm, and the two clips are hung up and down in the vertical direction, and maintained at a predetermined initial temperature (usually 80 ° C.). Place in a dipped oven. At this time, the load for pulling the sample in the vertical direction including the lower clip is set to 6 g. If the sample does not break 30 seconds after the sample is placed in the oven, the sample is taken out of the oven and the temperature in the oven is raised by 5 ° C. from the initial temperature. When the temperature is stabilized at the raised temperature, the sample is placed again in the oven in the same manner as described above, and it is checked whether the sample breaks within 30 seconds.
These operations were repeated, and the temperature at which the sample broke was defined as the softening point of the sample. When the softening point of the vinyl chloride homopolymer used for the decorative layer was measured by the same method, the sample did not break even when the oven temperature reached 180 ° C, and the softening point of the vinyl chloride homopolymer was 180 ° C.
Was found to exceed. The oven used in this example was “hot air circulation oven; (model number) P-35-5V” manufactured by Yashima Seisakusho Co., Ltd. Example 1 Production of decorative sheet: A vinyl chloride sol was applied on a polyester carrier and dried to form a transparent vinyl chloride resin film. A printed layer was formed on the surface of the PVC film by gravure printing to obtain a decorative layer composed of the printed layer and the PVC film.

Subsequently, a vinyl chloride-vinyl acetate copolymer (Union Carbide Co., Ltd.) was placed on the printed layer of the decorative layer.
Co., Ltd., trade name: VYHH, softening point = 110 ° C.) was applied and dried to form an adhesive layer, thereby obtaining a decorative sheet used in this example. The concentration of the copolymer solution was 25% by weight, and the solvent used was methyl ethyl ketone. The ink used to form the print layer was a polyvinyl chloride-based ink, “(product name) VS Ink” manufactured by Dainichi Seika Co., Ltd. In addition, the adhesive layer covered the entire back surface (printed surface) of the decorative layer, and was in close contact with both the portion where the printing ink was present and the portion of the PVC film where no ink was present.

The thickness of the decorative layer (including the printing layer) is 60
μm, and the thickness of the adhesive layer was 20 μm. Production of cosmetic material: After removing the carrier from the decorative sheet obtained as described above, the adhesive layer of the decorative sheet and a glass woven fabric (manufactured by Mie Woven Co., Ltd., trade name: microglass, product number: YEH1836) -A3) was brought into contact with the base layer and heat-laminated to form a decorative material of this example. This glass woven fabric has a thickness of 180 μm and a basis weight of 2
The density was 10 g / m ² and the density was 42 pieces / 25 mm in the vertical direction and 32 pieces / 25 mm in the horizontal direction. Further, the glass fiber of this woven fabric has been subjected to a surface treatment with an aminosilane compound. The lamination conditions were 180 ° C and 20 kgf /
m ² , 1 minute. The decorative sheet used in this example could easily and surely adhere to the glass woven fabric at such a low temperature and in a short time. Further, no thermal damage of the decorative layer was observed, and the appearance was good.

Further, a pressure-sensitive adhesive layer with a liner was pressure-bonded to the back surface (the surface to which the decorative sheet was not adhered) of the base layer of the decorative material to obtain a decorative material with a pressure-sensitive adhesive. The pressure-sensitive adhesive used here was an acrylic pressure-sensitive adhesive containing an isooctyl acrylate-acrylic acid copolymer as a main component.
The thickness of the pressure-sensitive adhesive layer was 40 μm, and the total sum of the thicknesses of the decorative sheet and the pressure-sensitive adhesive layer was 120 μm. Evaluation of cosmetic material: The adhesion test of the cosmetic material of this example was performed as follows. First, prepare about 30cm square cosmetic material,
Two cuts (kiss cuts) having a length of about 150 mm were provided in the decorative layer at intervals of 25 mm, and the strip having a width of 25 mm was forcibly peeled off from the base layer. The peeled strip was held in one hand, the base layer was held in the other hand, and the decorative layer and the base layer were pulled in opposite directions. At this time, the case where the peeling did not occur at any interface between the PVC film, the printing layer, the adhesive layer and the base layer, and the decorative layer or / and the base layer was broken was referred to as “O”.
K ”and“ N ”indicates that peeling occurred at any of the above interfaces.
G ". The result of the cosmetic material of this example was OK, indicating that the durability was high.

In addition, the nonflammability test (JIS) of the cosmetic material of this example
The result of A 1321 (1994) (surface test) was OK, which satisfied the standard of "flame retardant class 1". Here, a brief description of this test is as follows: the decorative layer of the decorative material is exposed to a flame under predetermined conditions, the amount of smoke generated from the decorative material within a predetermined time, and the upper position away from the decorative material. The case where the temperature curve measured in the above is below the specified value is regarded as "flame retardant first class". That is, the decorative material of this example is one example of a nonflammable decorative material that satisfies the “flame retardant first grade” standard.

Table 1 below summarizes the manufacturing conditions (thickness of the decorative layer, etc.) applied in this example together with those of the other examples, and Table 2 shows the decorative conditions. It is a summary of the evaluation results of the materials. Examples 2 to 4 The procedure described in Example 1 was repeated. However, in this example, the manufacturing conditions (thickness of the decorative layer, etc.) were changed as shown in Table 1 below.

As a result of the adhesion test performed in the same manner as in Example 1, all the decorative materials of these examples showed that the adhesion between the base layer and the decorative sheet was good, and the appearance of the decorative layer was good. Was. On the other hand, the result of the nonflammability test is shown in Example 2.
Satisfies the “flame retardant class 1” standard, but the sum of the thicknesses of the decorative sheet and the adhesive layer is 1
In Examples 3 and 4, which were 30 μm, this standard was not satisfied. The obtained evaluation results are shown in Table 2 below. Example 5 The procedure described in Example 4 was repeated. However, in this example, the thickness of the decorative layer was changed to 50 μm, and the total thickness of the decorative sheet and the adhesive layer was set to 100 μm. In the adhesion test performed in the same manner as in Example 1, the adhesion between the base layer and the decorative sheet was good, and the appearance of the decorative layer was good. On the other hand, the results of the nonflammability test satisfied the “flame retardant first class” standard. Comparative Example 1 A decorative material was obtained in the same manner as in Example 1 except that the silane treatment was not performed. The manufacturing conditions are shown in Table 1 below, and the evaluation results are shown in Table 2 below. In this example, since the fibers of the base layer were not treated with the silane compound, the adhesion between the base layer and the decorative sheet was poor. However, since the total sum of the thicknesses of the decorative sheet and the adhesive layer was 110 μm, the nonflammability test was OK. Comparative Example 2 A decorative material of this example was obtained in the same manner as in Example 1 except that a vinyl chloride homopolymer (the same as that used for the decorative layer) was used for the adhesive layer. The manufacturing conditions are shown in Table 1 below, and the evaluation results are shown in Table 2 below. In this example, since the adhesive layer was a vinyl chloride homopolymer, the adhesion between the base layer and the decorative sheet was poor. Further, since the total sum of the thicknesses of the decorative sheet and the adhesive layer was 150 μm, the nonflammability test was NG. Comparative Example 3 Heat lamination conditions were 200 ° C., 20 kgf / m ² , 2
A cosmetic material of this example was obtained in the same manner as in Comparative Example 2 except that the time was changed to minutes. In this example, the heating temperature and time were set longer so that the adhesive strength was increased as compared with the above conditions, but as in Comparative Example 2, the adhesion between the base layer and the decorative sheet was poor.

[0042]

[Table 1]

[0043]

[Table 2]

[0044]

According to the present invention, the base layer containing the fiber and the decorative layer containing the vinyl chloride resin are sufficiently bonded in a short time at a low temperature at which the decorative layer is not thermally damaged. A lightweight and highly durable cosmetic material that can be adhered by force can be provided. Further, according to the present invention, the cosmetic material as described above and having the highest level in the surface test defined in JIS A 1321;
It is also possible to provide a non-combustible cosmetic material that can be recognized as “grade”.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a preferred example of a decorative material according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base layer 2 ... Decorative sheet 3 ... Adhesive layer 4 ... Decorative layer 5 ... Printing layer 6 ... Adhesive layer 7 ... Release paper 10 ... Decorative material

Claims (4)

[Claims] 1. A base layer made of a fiber-containing material, 2) a decorative layer containing a vinyl chloride resin, and a heat-bondable adhesive layer adhered to the back surface of the decorative layer, wherein the adhesive layer is interposed therebetween. A decorative sheet adhered to the surface of the base layer, wherein the adhesive layer contains a vinyl chloride copolymer, and the fibers of the fiber-containing material of the base layer are coated with a silane compound. A cosmetic material characterized by being treated. 2. The decorative material according to claim 1, wherein the vinyl chloride copolymer of the adhesive layer has a softening point of 80 to 180 ° C. 3. The cosmetic material according to claim 1, wherein the silane compound is an aminosilane compound. 4. An adhesive layer comprising: a) a base layer made of a non-combustible fiber-containing material; and b) a decorative layer containing a vinyl chloride resin, and a heat-bondable adhesive layer adhered to the back surface of the decorative layer. And c) a pressure-sensitive adhesive layer adhered to the back surface of the base layer, wherein the adhesive layer comprises a vinyl chloride copolymer. The fibers of the non-combustible fiber-containing material of the base layer are surface-treated with a silane compound, and the sum of the thickness of the decorative sheet and the thickness of the pressure-sensitive adhesive layer is in a range of 30 to 120 μm. Non-combustible cosmetics.