JP6638176B2 - Decorative sheet for whiteboard - Google Patents

Description

The present invention relates to a decorative sheet for whiteboard .

  As a decorative sheet used for a white board or the like, for example, a base sheet such as a polyester film, a resin layer having marker writing and erasing properties provided on the surface of the base sheet, and provided on the back surface of the base sheet There is known a whiteboard sheet or the like having an obtained concealing sheet (see Patent Document 1).

JP-A-63-188186

However, the whiteboard sheet described in Patent Literature 1 has high rigidity and poor bending workability. Therefore, for example, if a whiteboard sheet is pasted on multiple surfaces of a three-dimensional adherend such as a square lumber or a sphere, or a whiteboard sheet is pasted on a curved surface, the whiteboard sheet may float or peel off. It was easy.
Further, the whiteboard sheet disclosed in Patent Literature 1 does not consider the designability.

  An object of the present invention is to provide a decorative sheet excellent in bending workability and design.

The present invention includes the following aspects.
[1] A base material layer in which a first sheet containing polyethylene terephthalate and a second sheet containing polyvinyl chloride are laminated, and a top coat layer provided on the surface of the base material layer on the first sheet side Having a decorative sheet.
[2] The decorative sheet according to [1], having a print layer between the first sheet and the second sheet.
[3] The decorative sheet according to [1] or [2], wherein the decorative sheet has a release layer on the second sheet side surface of the base material layer via an adhesive layer.
[4] The decorative sheet according to [3], having a primer layer between the base material layer and the pressure-sensitive adhesive layer.

  The decorative sheet of the present invention is excellent in bending workability and design.

It is sectional drawing which shows an example of the decorative sheet of this invention. It is sectional drawing which shows the other example of the decorative sheet of this invention. (A) is a perspective view of the test piece produced in Example 1, and (b) is a side view of (a).

Hereinafter, one embodiment of the decorative sheet of the present invention will be specifically described.
As shown in FIG. 1, a decorative sheet 10 of the present embodiment includes a base layer 11, a top coat layer 12 provided on the surface of the base layer 11, and an adhesive layer 13 on the back surface of the base layer 11. And a release layer 14 interposed therebetween. Further, the decorative sheet 10 of the present embodiment has a primer layer 15 between the base material layer 11 and the pressure-sensitive adhesive layer 13.

[Base material layer]
The base material layer 11 is a laminate in which a first sheet 11a and a second sheet 11b are laminated via an adhesive layer 11c.
In the present invention, the surface of the base material layer 11 on the side of the first sheet 11a is referred to as “the surface of the base material layer”, and the surface of the base material layer 11 on the side of the second sheet 11b is referred to as “the back surface of the base material layer”. .

<First sheet>
The first sheet 11a is a base material that contributes to the flatness of the decorative sheet 10, and includes polyethylene terephthalate (PET).
As the first sheet 11a, a PET sheet is used. Among the PET sheets, a biaxially stretched PET sheet is preferable in view of durability such as solvent resistance and heat resistance, general versatility, and smoothness in order to form the top coat layer 12 on the surface of the base material layer 11. .

  The thickness of the first sheet 11a is preferably from 12 to 188 μm, more preferably from 38 to 75 μm. In particular, when the thickness of the first sheet 11a is 38 μm or more, curling resistance and heat resistance due to curing shrinkage when a top coat agent described below is applied and cured is obtained. On the other hand, if the thickness of the first sheet 11a is 75 μm or less, the cost is low. In addition, when the decorative sheet 10 is used as a building material, nonflammability according to the Building Standards Law is required. However, if the thickness of the first sheet 11a is 75 μm or less, it is advantageous in terms of flammability.

  The first sheet 11a may contain components other than resins, such as a plasticizer, a filler, a heat stabilizer, a light stabilizer, an ultraviolet absorber, a lubricant, and a flame retardant. However, since the visibility of the second sheet 11b when viewing the second sheet 11b through the first sheet 11a is higher, the first sheet 11a does not contain a coloring agent, that is, is not colored. Is preferred.

<Second sheet>
The second sheet 11b is a base material that contributes to the folding workability of the decorative sheet 10, and includes polyvinyl chloride (PVC).
The second sheet 11b may contain a coloring agent in order to enhance the design of the decorative sheet 10.
Examples of the second sheet 11b include a PVC sheet.

  The thickness of the second sheet 11b is preferably from 20 to 200 μm, more preferably from 50 to 120 μm. In particular, when the thickness of the second sheet 11b is 50 μm or more, the concealing property can be obtained. Further, as will be described in detail later, the printing suitability (solvent resistance) when a printing layer is formed on the second sheet 11b is also excellent. On the other hand, if the thickness of the second sheet 11b is 120 μm or less, sufficient bending workability can be obtained.

  The second sheet 11b contains components other than the resin, such as a plasticizer, a filler, a heat stabilizer, a light stabilizer, an ultraviolet absorber, a lubricant, and a flame retardant, in addition to the above-described colorant. Is also good.

When the decorative sheet 10 is used as a magnet sheet (magnetic sheet) that can be magnetically attached to a magnetic article, the second sheet 11b may include a magnetic material.
The filling rate of the magnetic material in the second sheet 11b (100% by volume) is preferably 40 to 80% by volume, and more preferably 50 to 70% by volume. When the filling ratio of the magnetic material is 40% by volume or more, a decorative sheet 10 having excellent magnetic attraction characteristics is easily obtained, and when the filling ratio is 80% by volume or less, the moldability becomes good.

Examples of the magnetic material include a hard magnetic material and a soft magnetic material.
Examples of the hard magnetic material include Sr ferrite, Ba ferrite, rare earth-based (Sm-Co-based, Nd-Fe-B-based, Sm-Fe-N-based, etc.), Fe-Cr-Co-based, and alnico-based. . These may be used alone or in combination of two or more.
Examples of the soft magnetic material include Mn-Zn soft ferrite, Ni-Zn soft ferrite, and Mg-Zn soft ferrite. These may be used alone or in combination of two or more.

<Adhesive layer>
As the adhesive for forming the adhesive layer 11c, those usually used for the adhesive layer in the decorative sheet can be used. The adhesive forming the adhesive layer 11c may be a two-component curing type, a one-component curing type, or an ultraviolet curing type.
Specific examples of the adhesive include a heat-sealing resin such as a polyester resin, a polyurethane resin, a polyester-polyurethane resin, an acrylic resin, and an ethylene-vinyl acetate copolymer. Among them, polyester resins and polyester-polyurethane resins are preferred. These may be used alone or in combination of two or more. The adhesive may contain a curing agent such as isocyanate.
As the adhesive forming the adhesive layer 11c, a polyester resin containing isocyanate as a curing agent is preferable from the viewpoint of the appearance and the adhesion strength of the decorative sheet 10.
It is preferable that the adhesive layer 11c does not contain a coloring agent, that is, is non-colored.

  The thickness of the adhesive layer 11c is preferably 2 to 30 μm, more preferably 5 to 15 μm. In particular, if the thickness of the adhesive layer 11c is 5 μm or more, the first sheet 11a and the second sheet 11b can be bonded with sufficient strength, and if the thickness is 15 μm or less, the effect on transparency and production cost is reduced. Low in flammability.

[Top coat layer]
The top coat layer 12 is a layer having a writing property of the marker ink and an erasing property of the marker ink by the eraser, and is provided on the surface of the base material layer 11, that is, the surface of the base material layer 11 on the first sheet 11a side. I have.
Examples of the top coat agent for forming the top coat layer 12 include an ultraviolet curable resin, a thermoplastic resin, a one-part curable paint, and a two-part curable paint. Above all, an ultraviolet curable resin is preferable because of its excellent durability in repeated writing and erasing.

  Examples of the ultraviolet curable resin include an acrylic urethane resin, an unsaturated polyester resin, an ene / thiol resin, and a cationic resin. Further, the ultraviolet curable resin may contain an additive such as reactive silicone. Here, the reactive silicone means a silicone having a reactivity depending on the nature of the organic group to be introduced among modified silicones having an organic group introduced into a side chain or a terminal. Examples of such modified silicone include various modified silicones such as amino-modified, epoxy-modified, carboxy-modified, carbinol-modified, methacryl-modified, mercapto-modified, phenol-modified, and heterofunctional group-modified.

Examples of the thermoplastic resin include polyvinyl chloride, polypropylene, polyethylene, polyester, polystyrene, acrylonitrile-butadiene-styrene resin (ABS), and polymethyl methacrylate (PMMA).
It is preferable that the top coat layer 12 does not contain a coloring agent, that is, is not colored.

  The thickness of the top coat layer 12 is preferably 0.5 to 20 μm, and more preferably 1 to 5 μm. In particular, when the thickness of the top coat layer 12 is 1 μm or more, surface properties such as scratch resistance and solvent resistance can be sufficiently exhibited. On the other hand, if the thickness of the top coat layer 12 is 5 μm or less, curling during curing can be reduced. Further, the cost is suppressed and the color is hardly imparted.

[Adhesive layer]
The pressure-sensitive adhesive layer 13 is provided on the back surface of the base material layer 11.
As the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 13, those commonly used for a pressure-sensitive adhesive layer in a decorative sheet can be used, and examples thereof include an acrylic pressure-sensitive adhesive containing an acrylic polymer and a tackifier. Here, as the monomer units constituting the acrylic polymer of the acrylic pressure-sensitive adhesive, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, (meth) acrylic (Meth) acrylic acid alkyl esters such as butyl acrylate. Examples of the tackifier include rosin-based, terpene-based, phenol-based, and coumarone-based tackifiers.

  The thickness of the pressure-sensitive adhesive layer 13 is preferably from 10 to 100 μm, more preferably from 25 to 50 μm. In particular, if the thickness of the pressure-sensitive adhesive layer 13 is 25 μm or more, a sufficient adhesive strength can be obtained, so that the decorative sheet 10 can be stuck to a desired location. Is also advantageous.

[Release layer 14]
The release layer 14 protects the exposed surface of the pressure-sensitive adhesive layer 13 and is provided on the surface of the pressure-sensitive adhesive layer 13 opposite to the base layer 11. The release layer 14 is peeled off when the decorative sheet 10 is attached to a desired location.
The release layer 14 is not particularly limited as long as it can be separated from the pressure-sensitive adhesive layer 13, and examples thereof include a PET sheet, a polyethylene sheet, a polypropylene sheet, and paper coated with a release agent such as silicone.
The thickness of the release layer 14 is preferably 20 to 100 μm from the viewpoint of handleability and cost.

[Primer layer]
The primer layer 15 enhances the adhesion between the base material layer 11 and the pressure-sensitive adhesive layer 13, and is provided between the base material layer 11 and the pressure-sensitive adhesive layer 13 as shown in FIG.
Examples of the primer forming the primer layer 15 include polyurethane and polyester.

  The thickness of the primer layer 15 is preferably 0.5 to 10 μm, more preferably 1 to 5 μm. In particular, if the thickness of the primer layer 15 is 1 μm or more, the base layer 11 and the pressure-sensitive adhesive layer 13 can be in close contact with sufficient strength, and if it is 5 μm or less, the cost can be reduced.

[Production method]
The decorative sheet 10 of the present embodiment can be manufactured, for example, as follows.
A top coat agent is applied to one surface of the first sheet 11a in advance and dried to form a top coat layer 12.
An adhesive is applied to the other surface of the first sheet 11a and dried to form an adhesive layer 11c on the other surface of the first sheet 11a. The obtained first sheet 11a and second sheet 11b having the top coat layer 12 and the adhesive layer 11c are laminated so that the adhesive layer 11c and the second sheet 11b face each other, and then aged. The first sheet 11a and the second sheet 11b are attached to each other to produce the base material layer 11 having the top coat layer 12 provided on the surface.
Next, a primer is applied to the back surface of the base material layer 11 and dried to form a primer layer 15.
Separately, an adhesive is applied to one surface of the release layer 14 and dried to form the adhesive layer 13 on the release layer 14.
The obtained release layer 14 with the pressure-sensitive adhesive layer 13 and the base material layer 11 provided with the top coat layer 12 on the front surface and the primer layer 15 on the back surface are combined with the pressure-sensitive adhesive layer 13 and the primer layer 15. After being laminated so that they face each other, aging is performed and the base material layer 11 and the release layer 14 are bonded to each other to obtain the decorative sheet 10.

Examples of the method of applying a top coat agent, an adhesive, a primer, and an adhesive include a gravure coat method (including a microgravure coat method), a comma coat method, a roll knife coat method, a die coat method, a reverse roll coat method, and a roll coat method. And a cast coating method.
Examples of a method for laminating the first sheet 11a and the second sheet 11b and a method for laminating the base layer 11 and the release layer 14 include a dry lamination method.
Examples of the aging method include a method of curing at 20 to 50 ° C. for 1 to 5 days.

  In the method described above, the top coat layer 12 is formed on the surface of the first sheet 11a in advance, but after the base layer 11 is manufactured, the base layer 11 and the release layer 14 are bonded together. After that, the top coat layer 12 may be formed on the surface of the base material layer 11.

[Effects]
The decorative sheet 10 of the present embodiment has a base layer 11 having a laminated structure. That is, the base material layer 11 includes a first sheet 11a containing PET, which contributes to the flatness of the decorative sheet 10, and a second sheet 11b containing PVC, which contributes to the folding workability of the decorative sheet 10. Is done. By making the base material layer 11 have such a laminated structure, the whole base material layer 11 can have flexibility, and the folding workability of the decorative sheet 10 is enhanced.
Further, since the first sheet 11a includes PET, the second sheet 11b is excellent in visibility when the second sheet 11b is viewed through the first sheet 11a. Therefore, for example, if the second sheet 11b is colored in a desired color, the design of the decorative sheet 10 is also enhanced. In addition, since the color of the second sheet 11b can be freely changed, the selectivity of the color of the decorative sheet 10 is enhanced.
Further, since the top coat layer 12 is provided on the surface of the base material layer 11, the writing performance of the marker ink and the erasing performance of the marker ink by the eraser are excellent.

  Further, since the pressure-sensitive adhesive layer 13 is provided on the back surface of the base material layer 11 of the decorative sheet 10, the decorative sheet 10 can be attached to a desired portion. Since the decorative sheet 10 is excellent in bending workability, the decorative sheet 10 is unlikely to float or peel off even when attached to the surface of a three-dimensional adherend.

The decorative sheet 10 is suitable for, for example, a white board used as a wall material of a school, a study cram school, an office, a store, and the like.
If the second sheet 11b contains a magnetic material, it can be used as a magnet sheet (magnetic sheet) that can be magnetically attached to a magnetic article.

[Other embodiments]
The decorative sheet of the present invention is not limited to the above.
For example, the decorative sheet may have a printed layer 11d between the first sheet 11a and the second sheet 11b, like the decorative sheet 20 shown in FIG.
In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The print layer 11d enhances the design of the decorative sheet 20, and is formed by printing on the surface of the second sheet 11b on the first sheet 11a side.
In the printing layer 11d, as a pattern or pattern formed by printing, for example, wood grain, stone grain, cloth grain, sand grain, tiled pattern, brickwork pattern, leather pattern, geometric pattern, letters, symbols, metallic, etc. No. These pictures and patterns can be combined.
Examples of the printing method include screen printing, gravure printing, flexographic printing, letterpress printing, and inkjet printing.

The ink used for the print layer 11d contains a binder resin and a colorant.
Examples of the binder resin include an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a chlorinated polypropylene, a polyester resin, a cellulose resin, and a urethane resin.
Examples of the colorant include inorganic pigments such as titanium white, zinc white, carbon black, iron black, red iron oxide, chrome vermillion, cadmium red, ultramarine, cobalt blue, graphite, titanium yellow, phthalocyanine blue, and indanthrene. Organic pigments such as blue, isoindolinone yellow, benzylzine yellow, quinacridone red, polyazo red, berylen red, and aniline black; and pearlescent (pearl) pigments such as aluminum and brass and other scale-like foil powders. These may be used alone or in combination of two or more.
The ink used for the print layer 11d contains additives such as an ultraviolet absorber, a light stabilizer, an antioxidant, an antistatic agent, a storage stabilizer, a plasticizer, a lubricant, and a filler, if necessary. May be.

The decorative sheet 20 can be manufactured, for example, as follows.
A top coat agent is applied to one surface of the first sheet 11a in advance and dried to form a top coat layer 12.
Separately, the print layer 11d is printed on one side of the second sheet 11b.
An adhesive is applied to the other surface of the first sheet 11a and dried to form an adhesive layer 11c on the other surface of the first sheet 11a. The obtained first sheet 11a with the top coat layer 12 and the adhesive layer 11c and the second sheet 11b on which the print layer 11d is formed are laminated so that the adhesive layer 11c and the print layer 11d face each other. After the aging, the first sheet 11a and the second sheet 11b are bonded to each other to produce the base material layer 11 having the top coat layer 12 provided on the surface.
Next, a primer is applied to the back surface of the base material layer 11 and dried to form a primer layer 15.
Separately, an adhesive is applied to one surface of the release layer 14 and dried to form the adhesive layer 13 on the release layer 14.
The obtained release layer 14 with the pressure-sensitive adhesive layer 13 and the base material layer 11 provided with the top coat layer 12 on the front surface and the primer layer 15 on the back surface are combined with the pressure-sensitive adhesive layer 13 and the primer layer 15. After being laminated so that they face each other, aging is performed to bond the base material layer 11 and the release layer 14 to obtain the decorative sheet 20.

As described above, since the first sheet 11a contains PET, the second sheet 11b is excellent in visibility when the second sheet 11b is viewed through the first sheet 11a. Therefore, if the print layer 11d is printed on the second sheet 11b, the design of the decorative sheet 20 is further enhanced.
When the print layer 11d is printed on the second sheet 11b, the second sheet 11b may or may not contain a coloring agent.

  When the decorative sheet of the present invention is used as a magnet sheet (magnetic sheet), for example, a magnetic layer containing a magnetic material may be provided on the back surface of the base layer instead of mixing the magnetic material in the second sheet. When the primer layer 15 is provided on the back surface of the base layer 11 as shown in FIGS. 1 and 2, the magnetic layer (not shown) is provided between the base layer 11 and the primer layer 15.

  The filling ratio of the magnetic material in the magnetic layer (100% by volume) is preferably 40 to 80% by volume, and more preferably 50 to 70% by volume. When the filling ratio of the magnetic material is 40% by volume or more, a decorative sheet having excellent magnetic attraction characteristics is easily obtained, and when the filling ratio is 80% by volume or less, the moldability is good.

The magnetic layer contains a binder in addition to the magnetic material.
Examples of the binder include rubber (natural rubber, synthetic rubber such as acrylic rubber, etc.), resin (chlorinated polyethylene, polyisobutylene, chlorosulfonated polyethylene, etc.). These may be used alone or in combination of two or more.

  Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited thereto.

[Example 1]
<Preparation of decorative sheet>
One side of a biaxially stretched PET sheet (manufactured by Toyobo Co., Ltd., “A4300”) having a thickness of 50 μm, an ultraviolet-curing paint (manufactured by DIC Graphics Co., Ltd.) in which reactive silicone is mixed with an acrylic urethane resin as a top coat agent. “DR2 WB-1”) is applied by a microgravure coating method so that the dry coating amount is about 2 g / m ² , dried at 60 ° C., and topped on a biaxially stretched PET sheet (first sheet). A coat layer was formed.
Separately, a mixture of PVC and a coloring agent (titanium oxide) was formed into a sheet having a thickness of 90 μm by calendering to obtain a colored PVC sheet (second sheet). Then, one side of the colored PVC sheet is subjected to gravure printing (wood grain, abstract pattern 3-4 edition) using vinyl chloride-vinyl acetate based ink (“SX ink” manufactured by Showa Ink Industries, Ltd.) to be colored. A printing layer was formed on the PVC sheet (second sheet).

A two-part liquid containing 10 parts by mass of an isocyanate ("Coronate HL" manufactured by Nippon Polyurethane Industry Co., Ltd.) as a curing agent for 100 parts by mass of a polyester resin ("Hybon YA790-1" manufactured by Hitachi Chemical Co., Ltd.) as a main agent. The curable adhesive is applied to the other surface of the biaxially stretched PET sheet by a microgravure coating method so that the dry coating amount is about 13 g / m ^2, and the coating is dried at 70 ° C. An adhesive layer was formed on the other side of the.
The biaxially stretched PET sheet with the obtained top coat layer and adhesive layer and the colored PVC sheet on which the print layer is formed are laminated by a dry lamination method so that the adhesive layer and the print layer face each other, After curing at 35 ° C. for 3 days, the biaxially stretched PET sheet and the colored PVC sheet were bonded together to prepare a base material layer having a top coat layer on the surface.

Resulting polyurethane (Notepu Industry Co., Ltd., "No.5230") as primer on the back surface of the base material layer (the surface of the colored PVC sheet side), and gravure as dry coating amount of about 1 g / m ² coat A primer layer was formed on the back surface of the base material layer by coating by a method and drying at 60 ° C.
Separately, an acrylic pressure-sensitive adhesive is applied to one side of a silicone-coated paper (release layer) by a comma coater method so that the dry coating amount is about 50 g / m ² , dried at 60 ° C., and released. An adhesive layer was formed on the layer.
The obtained release layer with the pressure-sensitive adhesive layer and the base layer on which the top coat layer is provided on the front surface and the primer layer is provided on the back surface are dry-laminated so that the pressure-sensitive adhesive layer and the primer layer face each other. The laminate was cured by a method and cured at 40 ° C. for 2 days, and the base material layer and the release layer were laminated to obtain a decorative sheet 20 as shown in FIG.
About the obtained decorative sheet, bending workability and design property were evaluated as follows. Table 1 shows the results.

<Evaluation>
(Bendability)
The release layer of the decorative sheet was peeled off, and as shown in FIGS. 3A and 3B, the release layer was peeled over the upper surface 31 of the aluminum bar 30 and the upper end portions of the front surface 32 and the back surface 33. The decorative sheet 20 ′ was attached to the test piece 40. In addition, the length of the decorative sheet 20 ′ on the front surface 32 of the aluminum bar 30 was 5 mm, and the length of the decorative sheet 20 ′ on the back 33 of the aluminum bar 30 was 10 mm.
The test piece 40 was allowed to stand in an environment of 70 ° C. for 120 minutes and in an environment of −20 ° C. for 120 minutes.
The appearance of the test piece 40 after the thermal cycle test was visually observed, and the bending workability was evaluated according to the following evaluation criteria.
：: The decorative sheet did not float or peeled off.
X: The decorative sheet is floating or peeling.

(Creativity)
The decorative sheet was visually checked from the top coat layer side, and the design properties were evaluated according to the following evaluation criteria.
：: The pattern of the printed layer and the color of the colored PVC sheet can be confirmed.
×: The pattern of the printed layer and the color of the colored PVC sheet cannot be confirmed. Or, it cannot provide color selectivity or pattern.

[Comparative Example 1]
<Preparation of decorative sheet>
UV curing in which reactive silicone is blended with acrylic urethane resin as a top coating agent on one side of a white biaxially stretched PET sheet (E28G, manufactured by Toray Industries, Inc., easily adhesively treated) having a thickness of 125 μm as a base material A coating material (“DR2 WB-1” manufactured by DIC Graphics Co., Ltd.) is applied by a microgravure coating method so that a dry coating amount is about 2 g / m ² , dried at 60 ° C., and white biaxially stretched PET A top coat layer was formed on a sheet (substrate).
Separately, an acrylic pressure-sensitive adhesive is applied to one side of a silicone-coated paper (release layer) by a comma coater method so that the dry coating amount is about 50 g / m ² , dried at 60 ° C., and released. An adhesive layer was formed on the layer.
The obtained release layer with the pressure-sensitive adhesive layer and a white biaxially stretched PET sheet provided with a top coat layer on a surface thereof are dry-laminated so that the pressure-sensitive adhesive layer and the white biaxially stretched PET sheet face each other. And cured at 40 ° C. for 2 days, and the base material and the release layer were bonded together to obtain a decorative sheet.
About the obtained decorative sheet, bending workability and design property were evaluated similarly to Example 1. Table 1 shows the results.

As is clear from Table 1, the decorative sheet obtained in Example 1 was excellent in bending workability and design.
On the other hand, the decorative sheet of Comparative Example 1, which did not include the second sheet, was inferior in bending workability, was not capable of imparting color selectivity and pattern, and was inferior in design.

Reference Signs List 10 decorative sheet 11 base layer 11a first sheet 11b second sheet 11c adhesive layer 11d printing layer 12 top coat layer 13 adhesive layer 14 release layer 15 primer layer 20 decorative sheet 20 'release layer is peeled off Decorative sheet 30 Aluminum timber 31 Top surface 32 Front surface 33 Back surface 40 Test piece

Claims (3)

A first sheet containing polyethylene terephthalate, and a second sheet containing polyvinyl chloride, a substrate layer laminated via an adhesive layer containing a polyester resin ,
A topcoat layer containing an acrylic urethane-based resin, provided on the surface of the base material layer on the first sheet side,
A decorative sheet for whiteboard, comprising a printed layer formed on the surface of the second sheet on the first sheet side using a vinyl chloride-vinyl acetate-based ink . The decorative sheet for whiteboard according to claim 1, wherein the thickness of the second sheet is 50 to 120 µm.   The decorative sheet for whiteboard according to claim 1 or 2, further comprising a release layer on the surface of the base material layer on the second sheet side via an adhesive layer.

Images