JPS6330857B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides decorative materials ("decorative materials" in this specification refers to decorative walls, This invention relates to a decorative sheet used to obtain decorative ceilings, decorative floors, etc. that constitute part of buildings, and a method for producing decorative materials using the same.

In order to produce a decorative material by imparting an uneven pattern to the surface of a hydrous plastic material as described above, a formwork,
Methods using molds such as templates and rolls have been mainly used. This method using a mold has the advantage of being able to provide faithful pattern-like unevenness, but the disadvantage is that the mold used is expensive and has poor workability, and it often requires complicated auxiliary equipment and work. There is.

The research group to which the present inventors belong has already conducted various studies to easily form arbitrary uneven patterns, and has found that when various resin sheets come into contact with liquids that have an affinity for them, they undergo elongation or contraction deformation. Making use of the property of stretching and deforming, for example, by printing on such a sheet film, areas that are not affected by liquid or areas that are affected to different extents are provided, and the sheet is made with a component that causes expansion and contraction deformation. He discovered that when brought into contact with a decorative material layer, a concavo-convex pattern suitable for printing was given to the decorative material layer, and a method for manufacturing a decorative material was developed (Japanese Patent Application Laid-Open No. 1973-
Publication No. 91061). In other words, the manufacturing method for the decorative material is
A sheet is placed on the untreated decorative layer, which has areas that undergo expansion and contraction deformation, areas that do not undergo expansion and contraction, and/or areas that differ in the extent to which they undergo expansion and contraction due to the components constituting the makeup layer. Combine,
Next, a post-treatment suitable for the components constituting the above-mentioned decorative layer is performed to form irregularities on the above-mentioned decorative layer corresponding to each of the above-mentioned areas. In this method, a decorative material having an uneven surface pattern can be obtained from a hydrous plastic material by using a hydrophilic deformable sheet.

However, some problems were found in the above method as well. For example, in the uneven pattern obtained by the above method, undulations occur even in areas on the decorative material that are supposed to be smooth, which correspond to areas that are not subjected to expansion and contraction deformation of the sheet, making it difficult to distinguish them from other areas, that is, unevenness. The disadvantage is that the visual clarity of the pattern is poor. This drawback can be solved by a method (described in JP-A-55-51524) of applying pressure to the decorative layer and the sheet during expansion and contraction of the sheet.
However, applying such pressure is not always easy in some cases, such as when applying an uneven pattern to a wall coating material or the like. Furthermore, when using a hydrophilic deformable sheet in the above method, (a) the sheet may deform during storage, (b) it is difficult to peel off from the decorative material after curing, and (c) the hydrous plastic material There are drawbacks such as deformation occurring immediately upon contact with the material, and the time required for positioning or correction, and furthermore, removing air bubbles, etc., from occurring. Furthermore, in some cases, water absorption from the hydrated plastic material that causes the sheet itself to deform may deprive the plastic material of its plasticity, making it impossible to obtain a desired uneven pattern.

An object of the present invention is to solve the problems in the above-mentioned method for producing decorative materials.

As a result of research for the above-mentioned purpose, the present inventors have found that by using a decorative sheet in which a water permeation control layer is formed on the surface of a hydrophilic deformable sheet that is to be in contact with a hydrous plastic material, the above-mentioned problems can be solved essentially. It was found that an improvement could be obtained. That is, in the cosmetic sheet of the present invention, a water permeation control layer is provided on at least one entire surface of a hydrophilic deformable sheet that swells with water and undergoes elongation deformation, and partially has areas with different degrees of elongation deformation due to water absorption. It is characterized by:

Further, the method for producing a decorative material having an uneven surface pattern of the present invention is a method for producing a decorative material having an uneven surface pattern from a hydrous plastic material using the above-mentioned decorative sheet, and more specifically includes the following steps. It is characterized by this.

(1) A step of bringing the cosmetic sheet into close contact with the surface of the hydrous plastic material before hardening so that the surface provided with the water permeation control layer is in contact with the surface; (2) Swelling the cosmetic sheet with water and applying it in the direction of its surface. (3) curing the hydrous plastic material to at least a degree of self-shape retention; 4) A step of peeling off the decorative sheet.

Preferably, in the above step (2), additional water is applied to the surface of the decorative sheet opposite to the surface in contact with the hydrous plastic material. Thereby, sufficient deformation can be imparted to the decorative sheet without excessively depriving the plastic material of water and impairing its plasticity, and as a result, a deeper and clearer uneven pattern can be imparted.

The present invention will be explained in more detail below. In the following description, "%" and "part" indicating composition are based on weight unless otherwise specified.

1 to 4 are schematic cross-sectional views showing conceptual laminated structures of examples of the decorative sheet of the present invention, respectively.

As one typical embodiment, the decorative sheet A of the present invention is provided with a water permeability control layer 2 on the entire surface of one side of the hydrophilic deformable sheet 1, and furthermore, a water impermeable layer 2 is provided in a pattern on the entire surface of the hydrophilic deformable sheet 1, as shown in FIG. A printed layer 3 of color is provided.
This suppresses the deformability of the hydrophilic deformable sheet 1 due to water absorption and swelling in the area where the printed layer 3 is provided. The printed layer 3 is also formed between the hydrophilic deformable sheet 1 and the water permeability control layer 2 (FIG. 2), or on the surface of the hydrophilic deformable sheet 1 opposite to the surface on which the water permeation control layer 2 is provided (the third
(Fig.) can also be provided. From the viewpoint of pattern formation effect and decorative sheet formation by printing, it is the third
The embodiment of FIG. 1 or FIG. 2 is preferable to that shown in FIG. In addition, as shown in FIG. 4 corresponding to FIG. 1,
The water permeation control layer 2 can also be provided on both sides of the hydrophilic deformable sheet. In addition, in both examples,
The upper surface in the figure is planned to be brought into contact with a hydrous plastic material to be described later.

Next, to explain the materials of each part, the hydrophilic deformable sheet 1 is a film or sheet of hydrophilic resin such as polyvinyl alcohol (partially saponified polyvinyl acetate) or cellulose derivatives such as cellophane, nitrocellulose, acetylcellulose, and nitrocellulose. is used. Among them,
Polyvinyl alcohol, particularly a polyvinyl alcohol film having a degree of crystallinity of 10 to 15%, a degree of polymerization of 250 to 350, and a degree of saponification of 75 to 85% is preferably used. Polyvinyl alcohol (hereinafter abbreviated as "PVA") as a film raw material contains plasticizers such as glycols such as ethylene glycol and glycol;
Other additives such as cellulose derivatives such as methyl cellulose and carboxymethyl cellulose, starches such as dextrin and starch, and acrylic esters such as polyacrylic acid methyl ester; higher alcohols such as octyl alcohol; silicone antifoaming agents; isobutyl alcohol , n-butyl alcohol, cyclohexanone, cyclohexanol, pyridine, phenol, calcium rhodanide, sodium rhodide, and other viscosity stabilizers are added as necessary to form an aqueous solution, heated with a metal drum,
By forming a film by a casting method using a movable casting surface such as a roll or belt, and after drying, heat treatment is performed at, for example, 35 to 45℃.
You can get PVA film. The casting surface can be left in a desired matte state if desired. Further, film formation can also be performed using a T-die or a roll coater.

The thickness of the hydrophilic deformable sheet 1 is 10 μm to 2 mm, especially
A range of approximately 20 to 40 μm is appropriate.

The water permeability control layer 2 generally consists of a hydrophilic deformable sheet 1
It is formed by a layer of a resin that is more hydrophobic than the constituent materials, and more preferably contains an inorganic filler to adjust (generally increase) water permeability. As the resin, for example, polyurethane resin, nitrocellulose, polyamide resin, polyester resin, acrylic resin, vinyl chloride/vinyl acetate copolymer resin, etc. are used in combination as necessary. In particular, a polyurethane resin consisting of a combination of an acrylic polyol or a polyester polyol and an isocyanate curing agent is most preferably used. Such a polyurethane resin has excellent adhesion to a PVA film, especially when used in combination with the film.

Inorganic fillers added to the water permeability control layer 2 include titanium oxide, calcium carbonate, microsilica,
For example, particles with an average particle size of 1 to 15 μm are used.
It is preferable to mix about 0.1 to 20 parts of the resin to 100 parts of the resin.

The water permeation control layer 2 is of course required to have the property of appropriately suppressing water permeation, but other required properties include inhibiting the effect of the hydrophilic deformable sheet 1 from deforming to form an uneven pattern. Therefore, it is required to have excellent flexibility, appropriate water permeability, and adhesion to the hydrophilic deformable sheet 1 to the extent that it does not transfer to the cured cosmetic material when the sheet is peeled off. From this point of view, it is desirable that the thickness or coating amount be strictly controlled. The coating amount is generally 0.5 to 10g/m ²
(dry) degree is preferable, and when using a polyurethane resin, a range of 1.0 to 2.5 g/m ² is particularly preferable.

In addition, from the viewpoint of controlling water permeability, the thickness of the water permeability control layer 2 is preferably such that the water permeability (JIS Z0208) is reduced by about 10 to 40% of the value when the hydrophilic deformable sheet 1 is used alone. In addition, from the viewpoint of operability, when the decorative sheet A is brought into close contact with water or a water-containing plastic material through the water permeation control layer 2,
The time from adhesion to the start of deformation due to swelling of the hydrophilic deformable sheet is preferably in the range of 5 to 30 minutes, particularly 10 to 15 minutes. In addition, moisture permeability (JIS
Z0208) through a sample film of a certain area,
The amount of moisture that permeates through a unit area of a sample film in a unit time when one side has an air atmosphere with a temperature of 40℃ and a relative humidity of 90%, and the other side has an air atmosphere dried with calcium chloride (hygroscopic agent). For example, if the hydrophilic deformable sheet is a PVA film, the
600-800 (g/ ^m2・24hr.), whereas when the water permeability control layer is formed according to the present invention, the water permeability control layer is 400-500
g/m ²・24hr.

The water permeability control layer 2 as described above is prepared by mixing the resin and an inorganic filler added as necessary with a solvent used as necessary, and forming a solution type layer.
It is obtained by applying a curable ink or the like to the entire surface of the hydrophilic deformable sheet 1 using a gravure coating method, a roll coating method, or other methods. In addition to the resin and inorganic filler described above, stabilizers, curing agents, mold release agents, water repellents, and other additives may be added to the ink as necessary.

Due to its water impermeability and rigidity, the printing layer 3 is partially applied with ink or paint on the hydrophilic deformable sheet 1 or the water permeation control layer 2 in order to suppress elongation deformation of the hydrophilic deformable sheet 1 due to water absorption and swelling. It is formed by Formation methods include known methods such as printing methods such as intaglio printing, planographic printing, letterpress printing, and screen printing; coating methods such as brush coating, spatula coating, and spray coating; and other methods such as manual, A drawing method using a brush or the like is used, and by using such a method, arbitrary areas such as characters, figures, symbols, patterns, etc. can be provided.

The ink or coating composition used to form the printing layer 3 has as its main component a vehicle made of a hydrophobic resin similar to the resin forming the water permeation control layer 2 described above, and if necessary, for example, a plasticizer. ,
Stabilizers, curing agents, desiccants, surfactants, mold release agents,
By adding one or more of water repellents, humectants, moisture-proofing agents, softeners, colorants such as dyes and pigments, fillers, and various other additives, curable compositions, solution-type compositions, and emulsions can be prepared. A type composition or a sol type composition is used.

The coating layer of the printing layer 3 is in an amount necessary to provide the desired deformation suppressing effect to the above-mentioned hydrophilic deformable sheet 1, and is generally 0.5 to 0.4 g/m, although it varies depending on the type of resin used. ² (dry) level is preferable.

In addition, in order to make the elongation deformability of the hydrophilic deformable sheet 1 different regionally through swelling with water, instead of or in addition to the formation of the above-described printed layer, irradiation with ionizing radiation or ultraviolet rays, etc. It is also possible to adopt a method of partially varying properties such as the degree of crosslinking, degree of polymerization, degree of hydration, etc. by partial heating, acid or alkali treatment, etc.

In addition, the decorative sheet of the present invention has a relatively large area, and when patterning is applied to a large area such as when patterning is applied to a part of a building such as a wall or floor,
It is preferable to provide fine through-holes on the entire surface so that the plastic surface can be brought into close contact with the plastic surface without entrapping air bubbles before curing. Known methods can be used to provide such through holes in a decorative sheet, such as a method using a needle roll with needles planted on the entire surface of the roll and passing the holes between the needle roll and an opposing rubber roll, and A method using a mold in which needles are evenly planted is carried out by moving the mold up and down and intermittent feeding of the film or sheet, or a method in which the above-mentioned needle roll or needles in the mold with needles are heated and the sheet is partially melted. Alternatively, a method may be used in which a solvent capable of dissolving the sheet is provided in dots and then the sheet is heated to dissolve it in dots, but other methods may also be used. Note that the formation of these through holes may be performed after the formation of the water permeability control layer 2 and before the formation of areas with different degrees of elongation deformation by the formation of the printed layer 3, etc.; In this case, the smoothness around the through-hole decreases, making it difficult to form the printed layer 3. Therefore, it is preferable to form the through holes after forming the decorative sheet as shown in FIGS. 1 to 4. The diameter of the above-mentioned through holes is preferably about 0.2 to 0.4 mm, and the density of providing the through holes is preferably about 5,000 to 80,000 pieces/m ² .

Next, a basic aspect of the method for manufacturing a decorative material of the present invention using the above-mentioned decorative sheet will be explained.

First, as shown in FIG. 5, a suitable base material 4 is coated with a hydrous plastic material 5.

Various materials can be used as the base material 4, for example,
Various types of paper such as wood, plywood, particle board, thin or thick paper, decorative paper, cardboard, various woven or non-woven fabrics, steel plates, stainless steel plates, aluminum plates, copper plates, etc. Various organic polymer compounds and inorganic materials such as metal plates, various plastic plates or films, various fibrous plates such as hardboard, plasterboards, pulp cement plates, rock wool plates, wood wool cement plates, wood chip cement plates, etc. Composite substrates, asbestos slate boards, calcium silicate boards, GRC boards, various other inorganic boards, concrete surfaces of concrete buildings, etc. can be used. These are subjected to pretreatment, adhesive, etc., if necessary.

The hydrous plastic materials 5 to be applied include hydraulic cements such as Portland cement, hydraulic binders such as hemihydrate gypsum, and other inorganic caking binders such as dolomite, slaked lime, and various clays as binders. Fillers, aggregates, colorants such as pigments or dyes, plasticizers, stabilizing agents, hardening accelerators or retarders, wetting agents, emulsifiers, thickeners, blowing agents,
A composition made plastic by adding additives such as natural or synthetic resins and mixing with water is used. These hydrous plastic materials themselves are widely used mainly in architectural applications in the form of cement concrete compositions, mortar compositions, plastering compositions, and the like. As a plastering composition, a composition obtained by adding an inorganic aggregate to a synthetic resin emulsion may also be used. For coating the hydrous plastic material 5 on the base material 4, methods commonly used for this type of material, such as pouring using a mold, pouring, and troweling, are used as they are.

Next, as shown in Fig. 6, one of the decorative sheets A shown in Figs. is brought into close contact with the plastic material 5 so that it is in contact with the plastic material 5. In FIG. 6 and the following figures, the detailed structure of the decorative sheet A is omitted, and the area where deformation easily occurs due to swelling of the sheet A is indicated by the reference numeral 12, and the deformation is suppressed by the formation of the printed layer 3. The designated area shall be designated by the reference numeral 13.

When applying this decorative sheet A, it is desirable to bring it into close contact with the plastic material 5 starting from one end so as to prevent air from being drawn in between it and the plastic material 5 as much as possible. In addition, when the decorative sheet A has through holes, if there are a small amount of air bubbles, the air bubbles are removed from the through holes during the process of pressing with a trowel after application to improve the adhesion between the sheet A and the plastic material 5. be able to.

Next, by maintaining the above-mentioned close contact state, as shown in FIG. 7, the easily deformable area 12 of the sheet A is deformed into wrinkles by the water supply from the plastic material 5 (referred to as 12a), and the plastic material is deformed accordingly. 5
Wrinkle-like unevenness is formed in the corresponding portion. At this time, as mentioned above, if the water is supplied only from the plastic material 5, especially when the water content is not uniform over the entire surface, especially in the case of a large area such as wall painting,
Uniform elongation deformation may not occur over the entire surface of the sheet A. Furthermore, when water is supplied only from the plastic material 5, the plasticity of the material 5 may be taken away due to water absorption by the sheet A. Therefore, in a preferred embodiment of the present invention, as shown in FIG.
Additional water 6 is applied to the side of sheet A opposite the side in contact with the plastic material 5 to promote deformation in area 12 of sheet A. Water permeability control layer 2 (first
The presence of FIGS. 4) enables the desired situation in which the deformation of the sheet A is caused primarily by the additional water 6, without excessive water being taken away from the plastic material 5. As a result, it is possible to use a decorative sheet that does not have the above-mentioned water permeation control layer 2 and to use the additional water 6.
A more uniform and clear uneven pattern is imparted to the product decorative material than when no application is made.

The amount of additional water 6 to be applied is not particularly limited, but is preferably such that the entire surface of the sheet A is wetted and that floating water or water does not run off. When such additional water is applied, the material 5 is merely covered with the decorative sheet A which has plasticity and is relatively soft. Therefore, the method of applying the additional water 6 is preferably a method that does not exert almost any force on the sheet A, and a spray coating method is particularly desirable.

Next, it is held in the state shown in FIG. 7 to harden the hydrous plastic material 5 to the extent that it can at least maintain its surface shape. This hardening is hydration hardening when the binder is Portland cement, gypsum, etc., and is mainly due to evaporation of water when the binder is clay, dolomite, etc. In this holding state, if necessary, use a trowel, roll, or flat plate to remove the sheet A.
can also be pressed onto the plastic material 5.

After the material 5 is cured (indicated by 5a), the decorative sheet A is peeled off, and if necessary, post-curing is performed to obtain a decorative material as shown in FIG. 8. Post-curing includes, for example, leaving to stand naturally or heating by infrared irradiation.

In addition, in the method of the present invention, the hydrous plastic material may be colored in advance, or it may be colored after the patterned unevenness is imparted. Alternatively, the above methods can be combined as appropriate. By such a method, a decorative material that is colored or has a colored pattern in addition to the uneven pattern can be obtained.

The products obtained by the present invention are extremely unique and have a rich three-dimensional effect, and can be used in various fields such as interior materials such as walls and ceilings, building materials such as exterior materials, various decorative boards, signboards, packaging, etc. It can be applied to a wide range of applications.

As described above, according to the present invention, an inorganic cosmetic having a unique uneven pattern is produced from a hydrous plastic material by using a cosmetic sheet in which a water-impermeable part such as a printed pattern is formed on a hydrophilic deformable sheet developed by the present inventors. A method by which wood can be obtained (Japanese Patent Application Laid-Open No. 52-91061, No. 55-
51524), as a cosmetic sheet,
Further, by using a sheet provided with a water permeation control layer, not only can advantages such as sheet shelf life and various rationalization of processes be obtained, but also essential improvements can be obtained in the depth or clarity of the uneven pattern.

The present invention will be explained in more detail with reference to Examples below.

Example 1 Gravure ink (AR Ink, manufactured by Moroboshi Ink Co., Ltd.) containing a polyurethane resin as a vehicle was applied to one side of a 30 μm thick polyvinyl alcohol film (Hiselon D-103, manufactured by Nichigo Film Co., Ltd.). The depth of the pattern is increased to imitate a relief pattern.
Print layer by gravure printing using a gravure plate made to have a thickness of 50 μm (dry coating amount: 3.0 g/m ² )
Then, 65 parts of a polyurethane resin consisting of an acrylic polyol/isocyanate curing agent, 30 parts of titanium oxide (average particle size 1 μm) and 5 parts of finely divided silica were mixed with a weight of ethyl acetate/toluene (1/2).
1) Ink obtained by dissolving in mixed solvent (Moroboshi Ink)
A water permeation control layer (dry coating amount: 2.0 g/m ² ) was formed by solid printing on the entire surface using Mortar Primer (manufactured by Mortar Primer Co., Ltd.), and a decorative sheet corresponding to FIG. 2 was obtained.

The moisture permeability (JIS Z0208) of the above polyvinyl alcohol film is approximately 670 g/m ² 24 hr, but the moisture permeability of a composite film in which a water permeation control layer similar to the above is provided on this polyvinyl alcohol film is approximately It was 470g/ ^m2・24hr.

Pitch approx. 5mm to the above cosmetic sheet, tip diameter
Using a needle roll with 0.2 mm needles planted all over it, through holes were formed on the entire surface.

Apply acrylic emulsion as a primer to the vertical surface of the exterior wall of the concrete frame of the building using a sponge roll, leave it to dry for 30 minutes, and then apply a hydrous plastic material with the following composition to a thickness of 3 mm using a trowel. to form a coating layer.

Portland cement 100 parts Silica 30 parts Water 50 parts The decorative sheets in which the above-mentioned through holes were formed on the coated surface were stacked so that the water permeation control layer and the coated surface were in contact with each other. Some unevenness will begin to appear on the coated surface due to water, but
Furthermore, water was sprayed over the entire surface from the sheet side using a sprayer. The degree of spraying was such that the entire surface was coated with water without any corners, and the water did not run off. When sprayed with water, the parts of the sheet without a printed pattern swelled with water from both sides, forming wrinkles, while the parts with a printed pattern remained flat, forming a relief-like pattern. Thereafter, the cement was allowed to harden naturally, and the sheet was peeled off.

Example 2 A gypsum-based plaster consisting of gypsum, lime, and water was used instead of Portland cement, silica, and water, and the rest was carried out in the same manner as in Example 1, and the same relief-like effect as in Example 1 was obtained. , and a white decorative surface was obtained.

Example 3 Portland cement, silica, synthetic resin emulsion (Millecoat A, manufactured by Asahi Kasei Corporation) instead of water, and silica sand No. 5/Sotetsu Kuro No. 5, manufactured by Hitachi Kaiseki Co., Ltd. as aggregates = 1/ By repeating the operations in Example 1 except for using a mixture of 1 and 1 at a volume ratio of 3/1, a relief pattern similar to Example 1 and having fine irregularities of crushed stone on the surface was obtained.

[Brief explanation of the drawing]

1 to 8 are schematic cross-sectional views in the thickness direction of a decorative sheet or a decorative material manufactured using the same, and FIGS. 1 to 4 are respectively illustrations of implementations of the decorative sheet of the present invention. Give an example. Also, Figure 5~
Figure 8 explains the process of manufacturing the decorative material of the present invention using the above-mentioned decorative sheet. After fabrication, FIG. 7 shows the process of deforming the decorative sheet, and FIG. 8 shows the resulting decorative material. A... Decorative sheet, 1... Hydrophilic deformable sheet, 2... Water permeability control layer, 3... Water impermeable printed layer,
4... Base material, 5... Water-containing plastic material (5a... after curing), 6... Additional water, 12... Easily deformable area of the decorative sheet, 13... Deformation suppressed area of the decorative sheet.

Claims (1)

[Scope of Claims] 1. A cosmetic product comprising a hydrophilic deformable sheet that swells with water and undergoes elongation deformation, and a water permeation control layer is provided on at least one entire surface of the sheet, and regions with different degrees of elongation deformation due to water absorption are partially provided. sheet. 2. The decorative sheet according to item 1 above, wherein a water permeability control layer is provided on one entire surface of the deformable sheet, and a substantially water-impermeable printed layer is partially provided thereon. 3. The decorative sheet according to item 1 above, wherein a substantially water-impermeable printed layer is partially provided on one surface of the deformable sheet, and a water permeation control layer is provided on the entire surface of the deformable sheet. 4. The decorative sheet according to any one of the above items 1 and 3, wherein the water permeability control layer is formed to a thickness that reduces the moisture permeability (JIS Z0208) of the hydrophilic deformable sheet by 10 to 40%. 5. The decorative sheet according to any one of the above items 1 and 4, which is provided with fine through holes on the entire surface. 6. The cosmetic sheet according to any one of items 1 to 5 above, wherein the hydrophilic deformable sheet is made of a hydrophilic resin selected from polyvinyl alcohol and cellulose derivatives. 7. The decorative sheet according to any one of items 1 to 6 above, wherein the water permeation control layer is a coating film of a paint containing a resin that is more hydrophobic than the constituent materials of the hydrophilic deformable sheet and an inorganic filler. 8. A method for producing a decorative material having an uneven surface pattern, which is characterized by including the following steps. (1) A water permeation control layer is provided on at least one entire surface of a hydrophilic deformable sheet that swells with water and causes elongation deformation on the surface of the hydrous plastic material before hardening, and partially has areas where the degree of elongation deformation due to water absorption differs. (2) Swelling the cosmetic sheet with water and elongating it to different degrees within the area along the surface direction; (3) curing the hydrous plastic material to the extent that it has self-shape retention at least; and (4) peeling off the decorative sheet. Process. 9. The method of item 8 above, wherein in step (2), additional water is applied to the surface of the decorative sheet opposite to the surface in contact with the hydrous plastic material.