JPH09277460A - Decorative sheet and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a decorative sheet for wallpaper having a PVC layer be peeled easily by heating when replaced by providing a plasticizer migration preventing layer and a pressure sensitive adhesive layer comprising a polymer, a tackifier, and a solid plasticizer on the back side of a backing. SOLUTION: A plasticizer migration preventing layer 2, a PVC layer 3, a surface treatment layer 4, and a pattern printing layer 5 are formed in sequence on the surface of the backing of fire resistant lining paper, etc., which are used usually for wallpaper, etc., a plasticizer migration preventing layer 6 is formed on the back of the backing 1, and a pressure sensitive adhesive layer 7 is formed on the surface of the plasticizer migration preventing layer. The layer 4 can be replaced with the layer 5. The plasticizer migration preventing layers 2, 6 are not limited, either of them is good, but it is preferable to provide both layers. Optional patterns including uneven patterns can be formed on the layer 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet for interior use, and more particularly to a decorative sheet which is used as a wallpaper by being stuck on a wall, ceiling or the like, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, PV is used on a substrate such as a flame-retardant backing paper
A decorative sheet provided with a C resin layer and subjected to an appropriate pattern layer or embossing, and a decorative sheet to which an adhesive such as starch paste is applied to the back side of the base material and attached to a wall or ceiling at the time of construction, Generally known as PVC wallpaper. When this wallpaper is replaced by a pattern change, etc., the backing paper that is the base material peels between the paper sheets, and about half of it remains on the surface of the wall or ceiling structure. Not only was it necessary, but the original fire protection performance of the structure was sometimes degraded.

In order to solve this problem, there has already been proposed a wallpaper in which a heat-sensitive adhesive layer is provided on the back surface of the wallpaper in advance, and when the wallpaper is peeled off, the adhesive layer can be softened and removed by simple heating. . But in this case, PVC
When the plasticizer such as DOP contained in the layer gradually migrates and enters the heat-sensitive adhesive layer, or when the wallpaper is wound up for storage, etc., the PVC layer surface changes to the heat-sensitive adhesive layer surface. There is a problem that the rolled wallpaper causes a blocking phenomenon as a result of plasticizing the heat-sensitive adhesive layer by advancing into the space. In addition, when this wallpaper was used for construction, there was a problem that the heat-sensitive adhesive layer was softened over a long period of time and the wallpaper was peeled off from the adhesive layer. Further, when this phenomenon progresses, the solid plasticizer may move from the pressure-sensitive adhesive layer to the contrary and the problem that the solid plasticizer is not plasticized and cannot be peeled off even when heat is applied may occur.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a decorative sheet for wallpaper having a PVC layer, which occupies most of the market. The purpose of the present invention is to provide a decorative sheet that can be easily peeled off by applying heat after replacement after construction.

[0005]

In order to achieve the above object, first, in claim 1, in a decorative sheet having a PVC layer on the surface of a base material such as flame-retardant backing paper, transfer of a plasticizer to the surface of the PVC layer. A surface treatment agent layer having a prevention function and an appropriate pattern printing layer are provided, a plasticizer migration prevention layer is provided on the back side of the substrate, and a thermosensitive adhesive comprising a polymer material, a tackifier, and a solid plasticizer. It is a decorative sheet provided with an agent layer.

According to a second aspect of the present invention, in a decorative sheet having a PVC layer on the surface of a base material such as flame-retardant backing paper, a plasticizer migration preventing layer is provided on the front and back surfaces of the base material, and PVC is provided on the front side. Layer, a surface treatment agent layer having a plasticizer migration preventing function, an appropriate pattern printing layer, and a heat-sensitive adhesive layer comprising a polymer material, a tackifier, and a solid plasticizer on the back surface Is.

Further, in claim 3, a plasticizer migration preventing layer is provided on the surface of a base material such as a flame-retardant backing paper, and PV is provided thereon.
A C layer and a surface treatment agent layer are provided, and a pattern printing layer and a concavo-convex pattern are provided on the PVC layer or the surface treatment agent layer by an appropriate method, and a thermosensitive type is provided on the back surface of the base material via a plasticizer migration prevention layer. A method for producing a decorative sheet, which comprises forming an adhesive layer by an arbitrary method.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The embodiments of the present invention will be described below. In the decorative sheet of the present invention, a plasticizer migration-preventing layer 2, a PVC layer 3, a surface treatment layer 4, and a pattern printing layer 5 are sequentially provided on the surface of a substrate 1 such as a flame-retardant backing paper which is usually used for wallpaper and the like. A plasticizer migration preventing layer 6 is provided on the back surface of the base material 1, and a heat-sensitive adhesive layer 7 is provided on the surface of the plasticizer migration preventing layer. Here, the surface treatment layer 4 and the pattern layer 5 may be replaced with each other. Further, the plasticizer migration prevention layers 2 and 6 provided on the front and back surfaces of the substrate are not limited to this, and only one of them may be provided, but it is preferable to provide the plasticizer migration prevention layer on both surfaces of the substrate.

Here, the printed pattern layer 5 can be provided with an arbitrary pattern or an uneven pattern. The concavo-convex pattern may be a concavo-convex pattern formed by an embossing plate, or may be a concavo-convex pattern formed by raising a foaming ink in which a capsule foaming agent containing a hydrocarbon is dispersed in a synthetic resin layer.

The decorative sheet of the present invention is formed by applying a heat-sensitive adhesive to the back side of the plasticizer migration prevention layer 6 and drying it to form a film. The heat-sensitive adhesive layer 7 has starch as in ordinary wallpapers. Apply glue and apply to walls, ceilings, etc.

The heat-sensitive adhesive according to the present invention mainly comprises a polymer material, a tackifier and a solid plasticizer. This heat-sensitive adhesive does not have tackiness at room temperature, but it becomes tacky when heated, and loses its tackiness when left at room temperature for about 30 minutes again. Therefore, normally, the dry coating film of this pressure-sensitive adhesive has no tackiness, and there is no problem in the manufacturing process.

Here, the polymer material is a component which gives an adhesive force, and examples thereof include polyvinyl acetate resin, ethylene-vinyl acetate copolymer resin, polyacrylic ester resin, polyvinyl chloride resin, natural rubber, synthetic rubber, Polymer compounds such as polyester resin and polyurethane resin can be appropriately selected and used.

The tackifier is a component for enhancing the tackiness when activated by heating, and is a resin such as a rosin derivative, a terpene resin, a petroleum resin, a phenol resin, a xylene resin.

The solid plasticizer is a solid at room temperature and dissolves when heated above its melting point to swell and dissolve the polymer material and the tackifier to develop tackiness. . After the dissolution, the adhesiveness is completely lost by leaving it for 30 minutes at room temperature. Examples of the solid plasticizer include diphenyl phthalate, dihexyl phthalate, dicyclohexyl phthalate, dihydroabietyl phthalate, sucrose benzoate, tricyclohexyl citrate, and N-cyclohexyl-P-toluenesulfonamide, which are solid at room temperature. It is an organic compound.

The compounding ratio of the above materials is 100
On the other hand, the thermosensitive adhesive is prepared with 0 to 100 parts of the tackifier and 50 to 100 parts of the solid plasticizer. This composition is applied to the back side of the decorative sheet and dried to form the heat-sensitive adhesive layer 7. Usually, the coating amount of this adhesive layer is 10 to 3
0 g / m ² . The heat-sensitive adhesive can be applied by a known coating device such as gravure coating, knife coating, lip coating and roll coating.

The wallpaper or the like provided with the heat-sensitive adhesive layer 7 is
When the solid plasticizer of the heat-sensitive adhesive layer is activated by heating the entire wallpaper from the surface of the wallpaper with a heating device such as an iron or a jet dryer at the time of replacement, this adhesive layer serves as an adhesive. To work. That is, the adhesive bonds two objects when solidified, but it is also possible to peel the two objects before completely solidified, that is, in a liquid system. Therefore, it is possible to cleanly remove the wallpaper from the pressure-sensitive adhesive layer from the wall surface without destroying the flame-retardant backing paper.

As the surface treatment agent, urethane resin,
Fluorine-based resin or the like is used. The reason for using the surface treatment agent is to protect the surface of the decorative paper such as stain resistance and chalking, but without the surface treatment agent, when the product is wound up, the plastic layer such as DOP of the PVC layer surface is plasticized. The agent and the solid plasticizer on the surface of the heat-sensitive adhesive layer are compatible with each other to cause blocking. Further, in this case, the plasticizers can be easily moved to each other, and the plasticizer in the PVC layer moves to the heat-sensitive adhesive layer, plasticizes it, and peels at room temperature. Further, as this phenomenon progresses, a phenomenon occurs in which the solid plasticizer also moves from the adhesive layer and is not plasticized even when heat is applied.

Further, as the plasticizer migration-preventing layer, a material obtained by dispersing an inorganic powder such as aluminum hydroxide in an aqueous emulsion such as acrylic resin can be preferably used. The reason for providing the plasticizer migration prevention layer is that plasticizers such as DOP in the PVC layer migrate to the heat-sensitive adhesive layer with the passage of time after wallpaper application, or conversely, the solid plasticizer in the heat-sensitive adhesive layer. Is PV
This is to prevent the transition to the C layer.

In the case of commonly used wallpaper, the peelable layer is required between the backing paper and the peelable layer from the wall surface. Therefore, in the case of the decorative sheet of the present invention, The peelable layer does not require the peelability of the substrate because it is a pressure-sensitive adhesive layer. Therefore, the backing paper is not peeled between the sheets and is not sticky by the adhesive even after the peeling, so that the surface treatment of the wall surface of the gypsum board or the like is easy at the time of replacement of the rehome or the like.

[0020]

The present invention will be described below with reference to examples. Flame-retardant backing paper with a basis weight of 120 g / m ² (Tokushu Paper Co., Ltd., T
T-120TW, a plasticizer migration prevention layer mainly composed of an acrylic resin is formed on both sides of the backing paper), and a PVC paste is applied using a comma coater to a thickness of 70 g / m 2.
^{It was a 2} (dry) PVC resin layer. The composition of this PVC paste is shown below. [PVC paste] PVC resin 100 parts by weight Plasticizer (DOP) 35 parts by weight Plasticizer (D-160) 20 parts by weight Secondary plasticizer 10 parts by weight Stabilizer 4 parts by weight Filler (CaCO ₃ ) 100 parts by weight Foaming agent 13 parts by weight Colorant 15 parts by weight Diluent Appropriate amount This PVC resin layer is coated with 15 g / m ^{2 of} urethane resin to provide a pattern layer by printing, and then heated to foam the capsule foaming agent in the PVC layer. An uneven pattern was formed to produce a wallpaper. Then, 15 g / m ² of a heat-sensitive adhesive was applied to the back surface of the base material and dried. The composition of the heat-sensitive adhesive is shown below. [Blending of heat-sensitive adhesive] Ethylene vinyl acetate copolymer resin 100 parts by weight Rosin ester 10 Diclohexyl phthalate 100 Solvent Suitable amount

Thereafter, a paste prepared by mixing starch paste and water in a ratio of 1: 1 was applied to this wallpaper in an amount of 150 g / m ² (we
It was applied to t) and attached to a gypsum board. It was stored for 1 month at room temperature, 40 ° C. and 90% RH, and then heated from the surface using an industrial dryer. The heat-sensitive adhesive was activated by this heating, peeled off between the layers, and no adhesive remained on the surface of the gypsum board. In addition, stickiness due to the adherence disappeared within 30 minutes, and there was no hindrance to the next construction.

[0022]

As described above, the present invention has the following effects. The base material in the decorative sheet of the present invention does not require peelability. That is, in the case of a general wallpaper, the base material is required to have peelability because the layer to be peeled is between the backing paper, but the decorative sheet of the present invention is a base material because the layer to be peeled is an adhesive layer. Does not require peelability. Easy to replace. That is, the backing paper is not peeled between the sheets, and there is no stickiness due to the adhesive even after the peeling. Therefore, at the time of replacement by rehome or the like, the surface treatment of the wall surface of the gypsum board or the like is easy. Since it can be applied to an inexpensive PVC wallpaper, it has a great technical effect. Does not deteriorate the fireproof performance of the base material forming the wall. The wallpaper can be reused. In other words, since it can be peeled off from the wall surface in a relatively large area,
It is advantageous for reuse.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a decorative sheet in a cross section according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a cross section of a decorative sheet according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base material (flame-retardant backing paper) 2 ... Plasticizer migration prevention layer 3 ... PVC layer 4 ... Surface treatment layer 5 ... Printing layer 6 ... Plasticizer migration prevention layer 7 ... Thermosensitive adhesive layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location C09J 7/02 JKQ C09J 7/02 JKQ JLE JLE

Claims (3)

[Claims] 1. A decorative sheet having a polyvinyl chloride resin composition layer (hereinafter referred to as a PVC layer) provided on the surface of a substrate such as a flame-retardant backing paper, and a surface treatment agent layer having a plasticizer migration preventing function on the surface of the PVC layer. And an appropriate pattern printing layer are provided, a plasticizer migration preventing layer is provided on the back side of the base material, and a heat-sensitive adhesive layer composed of a polymer material, a tackifier, and a solid plasticizer is provided. Makeup sheet to be. 2. A decorative sheet having a PVC layer provided on the surface of a substrate such as a flame-retardant backing paper, wherein a plasticizer migration preventing layer is provided on the front and back surfaces of the substrate, and the PVC layer and the plasticizer migration preventing function are provided on the front side. A decorative sheet comprising: a surface-treating agent layer having: and an appropriate pattern printing layer, and a heat-sensitive adhesive layer comprising a polymer material, a tackifier, and a solid plasticizer on the outermost surface. 3. A plasticizer migration-preventing layer is provided on the surface of a substrate such as a flame-retardant backing paper, and a PVC layer and a surface treating agent layer are provided thereon, and the PVC layer or the surface treating agent layer is provided with an appropriate method. A method for producing a decorative sheet, comprising a pattern-printed layer and a concavo-convex pattern, and a heat-sensitive adhesive layer formed on the back surface of the base material via a plasticizer migration-preventing layer by an arbitrary method.