JPH10255334A - Optical card and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form printing receptive layers, which consists of an A layer (first adhesion improving layer)/B layer (second adhesion improving layer)/C layer (characteristic and image information forming layer) and are printable with characters and images by a thermal transfer printer, on a hard-coating layer with a good adhesion property by providing the surface of this hard-coating layer with these printing receptive layers and forming the B layer of a material mixture composed of the A layer and the C layer. SOLUTION: The A layer is laminated on the hard-coating layer 3. While the state of the A layer soluble with the C layer is maintained, the C layer is laminated and the B layer consisting of a material mixture composed of the and the C layer is formed between the A layer and the C layer and thereafter, the energy of a heat treatment or UV treatment is applied on the A layer, the B layer and the C layer, by which the printing receptive layers 2 are obtd. The A layer is formed of a urethane acrylate resin and the C layer is mainly formed of an acrylic resin or vinyl chloride resin. As a result, the printing on the surface of the hard-coating layer 3 which is heretofore not printable with the visible information, with the individual information 1, OCR characters, bar codes, etc., by the thermal transfer printer is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an optical card having improved printability by a thermal transfer printer and a method for manufacturing the same.

[0002]

2. Description of the Related Art At present, credit cards, ID cards,
As a method of writing personal information on an identification card such as a bank card, a bar code that reads information using a dedicated device, an OCR (Opt)
ical Character recognitio
n; optical character recognition) on the card surface with a thermal transfer printer, and the use of a thermal transfer printer on the card surface with image information such as character information and photographs that can be normally read by humans. .

As a thermal transfer printer, a sublimation type thermal transfer printer, a fusion transfer type thermal transfer printer and the like have been put into practical use. In these thermal transfer printers, some of the pigments and dyes forming the characters and images formed by the thermal transfer printer diffuse into the resin forming the surface of the plastic card by the heat of the thermal transfer printer, Or mixed with resin. The pigments and dyes of the characters and images are designed to be diffused into the resin on the card surface or mixed with the resin to improve the wear resistance and adhesion of the printed images and characters.

[0004] These thermal transfer printers and transfer ribbons are adjusted so that the material of the surface to be transferred on which characters and images are formed matches the vinyl chloride resin. On the other hand, in recent years, optical cards have been developed and marketed as card-shaped recording media with high density and high recording capacity. As shown in FIG. 3, a general optical card is provided with a hard coat layer 11 on a front surface of a transparent substrate 12 having an uneven preformat 16 formed on the back surface, and a preformat 1 on the back surface.
A recording layer 17 and visible information 14 are provided on the surface on which the protective substrate 1 is formed.
3 and a structure in which visible information 14 is formed on the outer surface of the protection substrate 13. For recording and reproducing information, the recording and reproducing light 15 is irradiated through the transparent substrate 12 to record or reproduce information on the recording layer 17.

Therefore, it is preferable that the surface of the substrate on which the recording / reproducing light is incident is free from scratches. In general, a hard coat layer is applied to the optical card surface as described above in order to suppress the occurrence of scratches. These hard coat layers are formed of an ultraviolet curable resin (a resin represented by urethane acrylate), a thermosetting silicone resin, or the like.

[0006]

SUMMARY OF THE INVENTION In an optical card,
Barcode, OCR,
It is required that information such as a card owner's name, ID number, and face photograph be formed on the card surface. However, a hard coat layer is formed on the recording / reproducing light incidence surface of the card.

The hard coat resin used for forming the hard coat layer generally has high crosslinkability, a high heat deformation temperature, and a low surface tension. Therefore, even if an attempt is made to form characters and images on the surface of the hard coat resin with a thermal transfer printer, the characters and images are not transferred from the thermal transfer film to the surface of the hard coat resin. Even when transferred, the dyes and pigments do not sufficiently develop color because the resin, pigment and dye of the printing ink forming the characters and images are not diffused into the hard coat layer. In addition, there is a problem that the adhesion of the printing ink cannot be ensured, and the method has not been put to practical use.

In order to solve these problems, it has been considered to scrape off the hard coat layer and print the receiving layer, or to provide a heat transfer ink receiving layer directly on the surface of the hard coat layer. There are various problems.

1. Scratching is inefficient and increases the cost. 2. As a resin having an adhesive property to the hard coat layer, for example, a liquid curing type urethane acrylate resin may be mentioned, but the receiving layer formed of the urethane acrylate resin has a high cross-linking property and physical properties are similar to the hard coat layer. After curing, the surface of the urethane acrylate resin cannot be imprinted by a thermal transfer printer, because only one exists.

[0010] 3. In order to improve the thermal transfer printing characteristics of a receiving layer formed of a two-part curable resin such as a urethane acrylate resin, it is conceivable to cure a resin such as a urethane acrylate resin with relatively low energy.
However, immediately after the card is manufactured, even if it can be thermally transferred to a print receiving layer formed of a urethane acrylate resin or the like,
If the card is left at room temperature for several days, the hardening of the receptor layer will proceed, making it impossible to print with a thermal transfer printer. In addition, if the curing of the resin is incomplete, the adhesion to the hard coat layer cannot be improved.

4. In order to improve the thermal transferability, even if a vinyl chloride resin or an acrylic resin is used as the receiving layer and provided on the hard coat layer, high adhesion cannot be maintained. Peel off.

The present invention has been made to solve such problems of the prior art, and a print receiving layer capable of printing characters and images by a thermal transfer printer is formed on a hard coat layer with good adhesion. It is an object of the present invention to provide an optical card and a method for manufacturing the same.

[0013]

That is, the present invention relates to an optical card in which a print receiving layer is formed on a hard coat layer provided on the surface of a transparent substrate, wherein the print receiving layer has a first adhesion. Improvement layer (A layer) / Second adhesion improvement layer (B layer) /
An optical card comprising a character / image information forming layer (C layer) formed of three layers, and a B layer formed of a mixed substance of an A layer and a C layer.

Further, the present invention provides a method of forming a first adhesion improving layer (A layer) on a hard coat layer provided on the surface of a transparent substrate.
Second adhesion improving layer (B layer) / character / image information forming layer (C
Layer), the layer A is formed on the hard coat layer, and the layer C is formed thereon when the layer A is in a semi-cured state. And a method of manufacturing an optical card, characterized in that a B layer made of a mixed substance of the A layer and the C layer is formed at a contact portion between the A layer and the C layer.

In the present invention, it is preferable that the layer A is formed of a urethane acrylate resin and the layer C is formed of an acrylic resin or a vinyl chloride resin. The layer A is made of a urethane acrylate resin, and the layer C is made of an oligomer of an acrylic polyol having a hydroxyl group capable of forming a urethane bond and a vinyl chloride resin.
It is preferably made of a resin having a temperature of up to 90 ° C.

The present invention also relates to an information recording medium having a print receiving layer on a resin substrate, wherein the print receiving layer has a first surface remote from the substrate and a first surface close to the substrate. Second
Each having a composition different from that of the surface of
An information recording medium characterized in that substantially no peeling occurs in the print receiving layer according to the crosscut tape method specified in IS K5400.

The present invention also provides a transparent substrate, an optical recording layer, and a first protective layer in this order, and a second protective layer on a surface of the transparent substrate opposite to the side facing the optical recording layer. Is formed,
In an information recording medium having a print receiving layer on at least one of the first protective layer surface and the second protective layer surface, the print receiving layer is provided on the first surface on the side away from the substrate and on the substrate. The print receiving layer has a composition different from that of the second surface on the near side, and the print receiving layer is substantially free from peeling in the print receiving layer by a grid tape method specified in JIS K5400. An information recording medium characterized in that:

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an optical card having a print receiving layer formed on the surface of a substrate on which a hard coat layer made of a scratch-resistant cured resin is formed, wherein the print receiving layer comprises Adhesion improving layer (A layer) / second adhesion improving layer (B
Layer / character / image information forming layer (C layer), and the B layer is formed of a mixed material of the A layer and the C layer.

In the present invention, the following effects can be obtained by selecting the following resin material for forming the print receiving layer. That is, the layer A is formed of urethane acrylate resin, and the layer C is mainly formed of acrylic resin and vinyl chloride resin. Further, the resin material is formed of a resin having a heat deformation temperature of 60 to 90 ° C., wherein the layer A is a urethane acrylate resin, and the layer C is an acrylic polyol having a hydroxyl group capable of forming a urethane bond and a vinyl chloride resin. By doing so, it became possible to form a print receiving layer having higher adhesion to the hard coat layer.

FIG. 1 is a schematic sectional view showing an example of the optical card of the present invention. In the figure, the optical card of the present invention has a pre-groove formed on the other surface of a transparent substrate 4 provided with a hard coat layer 3 on one outer surface, and a recording layer 1 formed thereon.
0, a protective substrate 6 is laminated on the recording layer 10 via an adhesive 5, a printed layer 7 having information is printed on the surface of the protective substrate 6, and an overcoat film is formed thereon. And a personal information print 9 printed on the backside of the card on the surface of the overcoat film 8, and three layers of A layer / B layer / C layer on the hard coat layer 3 on the surface of the card. Is formed, and the print receiving layer 2
Is characterized in that personal information 1 is thermally transferred.

FIG. 2 is a partial schematic view of the optical card of the present invention. In the figure, in the present invention, a print receiving layer 2 is provided on a hard coat layer 3 on a first adhesion improving layer (A
Layer), a second adhesion improving layer (B layer), and a character / image information forming layer (C layer).

In the present invention, the method for forming the print receiving layer 2 is such that a first adhesion improving layer (A layer) is laminated on the hard coat layer 3 and the first adhesion improving layer (A layer) is formed of a character / character. While maintaining the soluble state in the image information forming layer (C layer),
The image information forming layer (C layer) is laminated, and between the A layer and the C layer,
A second adhesion improving layer (B
Layer), and heat-treating the A layer, the B layer, and the C layer,
Alternatively, the print receiving layer 2 is obtained by applying energy such as ultraviolet treatment.

For the first adhesion improving layer (layer A), for example, a urethane acrylate resin is preferably used, and is formed by using a two-part curable resin by isocyanate curing. Specifically, an acrylic polyol, polyester polyol or alkyd polyol, which forms a urethane bond, is used as a main component (an acrylic resin,
1-10 vinyl acetate resin or vinyl chloride resin
% By weight, 1 to 10 additives such as leveling material and defoamer
And the curing agent may be, for example, a two-part curable resin containing an isocyanate-based resin.

When the layer A is formed, the above resin is dissolved in a solvent before use. As the solvent, ketones such as cyclohexanone, aromatics such as toluene, alcohols such as ethyl cellosolve and methyl cellosolve, and esters such as ethyl acetate and butyl acetate are used alone or as a mixture.

The character / image information forming layer (C layer) is composed mainly of a vinyl chloride resin or an acrylic resin, and contains 1 to 10% by weight of an acrylic polyol or a polyester polyol which forms a urethane bond as another resin. It is synthesized using a resin mixture.

The hydroxyl group (-OH) of the acrylic polyol or polyester polyol is formed via the (-OH) group of the unreacted portion of the polyol resin used for forming the A layer and the unreacted isocyanate resin contained in the A layer. Thus, a urethane bond is formed to form a B layer.

Acrylic polyol oligomers are generally

[0028]

Embedded image (In the formula, R and R ′ each represent a linear or branched alkylene group or alkenylene group having 1 to 10 carbon atoms. M and L each represent an integer of 1 to 5, and n represents an integer of 1 to 500.) Is represented by

The polyester polyol is generally

[0030]

Embedded image (Wherein, R ₁ , R ₂ , R ₃ , and R ₄ represent a linear or branched alkylene group or alkenylene group having 1 to 10 carbon atoms. M and L are integers of 1 to 5, p is 1 to 5) It represents an integer of 500.)

When the C layer is formed, the above resin is dissolved in a solvent before use. As the solvent, ketones such as cyclohexanone, aromatics such as toluene, alcohols such as ethyl cellosolve and methyl cellosolve, and esters such as ethyl acetate and butyl acetate are used alone or as a mixture.

The second adhesion improving layer (B layer) is formed of a mixture of the first adhesion improving layer (A layer) and the character / image information forming layer (C layer).

Hereinafter, a specific example of the method for manufacturing an optical card according to the present invention will be described. 1. The first adhesion improving layer (layer A) is laminated on the surface of the hard coat layer, and the heating and drying temperature and time are controlled to control the resin so that the cured state of the resin is about 10 to 50%. -Laminating the image information forming layer (C layer), and
Leave for about 0 seconds. The cured state of the resin can be evaluated by the amount of unreacted isocyanate in the coating film.

A part of the resin of the first adhesion improving layer (A layer) which is incompletely cured in such a state that the resin does not disturb the next manufacturing process is left as it is, and the part of the character / image information forming layer ( C
Soluble in the resin solution of the layer). As a result, the resin of layer A and C
The layer B of the second adhesion improving layer in which the resin of the layer is mixed is formed.

Next, the A, B, and C layers were heated at 50 to 90 ° C. for 10 minutes.
By heating and drying for about 100 minutes, the resin is completely cured in the first adhesion improving layer (A layer), and the resin of the A layer is added to the resin of the A layer in the second adhesion improving layer (B layer). Due to the mixing of the resin, the curing shrinkage is caused by the first adhesion improving layer (A layer).
And the character / image information forming layer (C layer).
As a result, the difference in curing shrinkage between the layer A and the layer C becomes smaller,
By interposing the layer, the adhesion between the layer A and the layer C is improved. The layer B also functions as a stress buffer layer.

2. When the polyol resin is mixed in the resin forming the C layer, the B layer composed of the substance mixed with the C layer and the A layer has the C layer polyol resin contained in the A layer. It is formed in contact with an isocyanate resin. Next, by heating and drying, the polyol resin of the C layer forms a urethane bond via the isocyanate resin of the A layer to form the B layer, and as a result, the adhesion between the A layer and the C layer is improved.

As a material for the hard coat layer, an ultraviolet curable resin such as urethane acrylate, unsaturated polyester, or epoxy acrylate, or a silicon-based thermosetting resin can be used. Among them, urethane acrylate having high hardness is particularly preferable.

As the transparent substrate and the protective substrate, resins such as polycarbonate, polymethyl methacrylate, polyethylene terephthalate, and vinyl chloride are used.

Next, in the present invention, when the wavelength of light used for recording, for example, the wavelength of a light beam such as a semiconductor laser is 650 nm or more, particularly in the range of 700 to 900 nm, the recording layer 10 It is preferable that the energy required to cause an optically detectable change by irradiation with a light beam is small.

In the present invention, other characteristics are not particularly limited. A metal recording material such as tellurium, a tellurium compound, a silver salt, or an organic dye material can be used.
Further, it is preferable that the difference in optical characteristics between the information recording portion and the non-recording portion is large with respect to the light used for reproduction.

Examples of the substance used for the recording layer 10 in the present invention include anthraquinone derivatives (particularly those having an indathrene skeleton), dioxazine compounds and derivatives thereof, triphenodithiazine compounds, phenanthrene derivatives, cyanine compounds, and merocyanine. Compounds, pyrylium compounds, xanthene compounds, triphenylmethane compounds, croconium dyes, azo dyes, crocones, azines, indigoids, polymethine dyes, azulene dyes, squarium dyes, cyanine compounds having a polymethine chain Organic dye substances such as dyes and tetraphenylcyanine dyes are exemplified.

[0042]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 A polycarbonate substrate having a guide groove (thickness: 400 μm)
m), on the surface where the guide groove is not formed, an ultraviolet-curable urethane acrylate resin (Unidic 17-824-
9, hard coat layer of 5μ
m.

Next, dyes (I) and (II) having the following structure were mixed on the surface on which the guide grooves were formed to form a recording layer.

[0045]

Embedded image ((I): 75 wt%, (II): 25 wt%)

Separately, a protective substrate (280 μm thick) on which a logo and a design were printed was prepared. Transparent polycarbonate was used as a protective substrate. The thickness of the printing layer is logo printing,
It is 30 μm including the light-shielding printing layer. After printing, a vinyl chloride resin film having a thickness of 40 μm was laminated on the surface of the print layer using a hot press. Printing was performed by screen printing.

Next, the substrate on which the recording layer was formed and the protective substrate on which the print layer was formed were bonded together via an adhesive. As the adhesive, a hot melt adhesive having a thickness of 50 μm was used. The bonding temperature was 120 ° C.

In order to provide characters and image information on the surface of the hard coat layer, a print receiving layer was formed by the following method. 1) Formation of First Adhesion Improving Layer (A Layer) A white urethane acrylate resin (trade name: Screen Ink, HAC-120, manufactured by Seiko Advance Co., Ltd.) was used.

(Ink component) Acrylic polyol resin 30 wt% Vinyl chloride resin 1-4 wt% White pigment 20 wt% Leveling agent 2 wt% Solvent (cyclohexanone) 34 wt% Curing agent Isocyanate 10 wt% Ink of the above composition is put on the hard coat layer. The film was laminated to a thickness of 4 μm using a screen printer. Next, it was cured at a temperature of 60 ° C. for 10 minutes.

2) Formation of Second Adhesion Improving Layer (B Layer) and Character / Image Information Forming Layer (C Layer) A mixture of acrylic resin, vinyl chloride resin and vinyl acetate resin as the ink for forming the C layer (trade name: Seri call 1
3, Teikoku Ink Co., Ltd.) was laminated on the resin of 1) above to a thickness of 3 μm by screen printing. After the lamination, the substrate was left for 30 seconds to form a second adhesion improving layer (layer B).

Next, the substrate was left for 1 hour in a heating and drying oven at 60 ° C. to form a print receiving layer comprising A, B, and C layers on the hard coat surface of the optical card. Next, an optical card having a print receiving layer on the surface of the hard coat was obtained by cutting into a card size using a hollow blade cutting machine. Black characters of OCR-B specifications were formed on the print receiving layer of the obtained optical card using a card printer CP-1000 (manufactured by Toppan Printing Co., Ltd.). It was well read by the OCR reader.

Example 2 The C layer forming ink (trade name: Sericol 13) used in Example 1 was changed to VIC ink (main components: vinyl chloride resin and acrylic polyol resin, manufactured by Seiko Advance Co., Ltd.). In the same manner as in Example 1, an optical card having a print receiving layer on the hard coat surface was obtained.

Example 3 The same method as in Example 1 was used, except that the C layer forming ink (trade name: Sericol 13) used in Example 1 was changed to HRD ink (main component: acrylic resin, manufactured by Seiko Advance Co., Ltd.). Thus, an optical card having a print receiving layer on the surface of the hard coat was obtained.

Example 4 An optical card having a print receiving layer on the hard coat surface was obtained in the same manner as in Example 1, except that the material of the hard coat layer in Example 1 was changed to a silicon resin.

Example 5 The hard coat material of Example 1 was replaced with the following ultraviolet-curable urethane acrylate resin (Unidick 17-824).
9, Dainippon Ink) 50 wt% (C7-15
7, Dainippon Ink) 50wt
%, And an optical card having a print receiving layer on the hard coat surface was obtained in the same manner as in Example 1.

Comparative Example 1 The print receiving layer was composed of only the urethane acrylate resin (trade name: Screen Ink, HAC-120, manufactured by Seiko Advance) used for forming the first adhesion improving layer used in Example 1. Then, an optical card was obtained in the same manner as in Example 1. The heating and drying oven time of HAC-120 was 80 ° C. for 1 hour.

Comparative Example 2 A print receiving layer was formed without forming the second adhesion improving layer (B layer) used in Example 1. That is, the urethane acrylate resin (HA used for the first adhesion improving layer of Example 1)
C-120 ink) was applied as an A layer, and then cured by heating at 70 ° C. for 60 minutes.

Next, VI used in Example 2 was used as the C layer.
The ink of C was laminated, and heated and dried in a heating oven at a temperature of 60 ° C. for 60 minutes to remove the solvent of the resin, thereby forming a print receiving layer composed of the A layer and the C layer.

Comparative Example 3 The urethane acrylate resin (HAC) used in Example 1 was used.
A print receiving layer was formed without using -120 ink), and an optical card was obtained in the same manner as in Example 1.

Table 1 below shows the evaluations of the above examples and comparative examples.

[0061]

[Table 1]

(Note) (1) Possibility of printing by a thermal transfer printer The printing was performed by using the card printer CP-1000 (manufactured by Toppan Printing Co., Ltd.) used in Example 1. The circles could be read with an OCR character reader. JIS X-
9004, 5 Indicates that the standard for printed graphics is satisfied.

(2) Adhesion durability of print receiving layer (cross cut peel test) The cross cut tape test specified in JIS-K5400, 8.5 was followed. A mark indicates that substantially no peeling occurred in the print receiving layer in the cross cut tape test. Specifically, the evaluation score shown in Table 18 of JIS-K5400, 8.5 is 8 to 10.

[0064]

As described above, according to the present invention, it is possible to form a print receiving layer capable of printing characters and images with a thermal transfer printer on the surface of the hard coat layer with good adhesion. Further, in a card issuing system using a thermal transfer printer, personal information, OCR characters, bar codes, and the like can be printed on the surface of the hard coat layer where visible information could not be printed.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of an optical card of the present invention.

FIG. 2 is a partial schematic view of the optical card of the present invention.

FIG. 3 is a schematic view showing a conventional optical card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Personal information 2 Print receiving layer 3 Hard coat layer 4 Transparent substrate 5 Adhesive 6 Protective substrate 7 Print layer 8 Overcoat film 9 Personal information printing 10 Recording layer 11 Hard coat layer 12 Transparent substrate 13 Protective substrate 14 Visible information 15 Recording / reproducing Light 16 Preformat 17 Recording layer 18 Adhesive layer A layer First adhesion improving layer B layer Second adhesion improving layer C layer Character / image information forming layer

Claims (8)

[Claims] 1. An optical card having a print receiving layer formed on a hard coat layer provided on a surface of a transparent substrate, wherein the print receiving layer is formed of a first adhesion improving layer (A layer) / a second adhesion improving layer (A layer). Adhesion improving layer (B layer) / character / image information forming layer (C layer)
3. An optical card, wherein the optical card is formed of three layers, and the B layer is formed of a mixed substance of the A layer and the C layer. 2. The character / image information forming layer (C layer) wherein the first adhesion improving layer (A layer) is a urethane acrylate resin.
2. The optical card according to claim 1, wherein said optical card is formed of an acrylic resin or a vinyl chloride resin. 3. The character / image information forming layer (C layer) wherein the first adhesion improving layer (A layer) is a urethane acrylate resin.
Contains an acrylic polyol having a hydroxyl group capable of forming a urethane bond and a vinyl chloride resin.
The optical card according to claim 1, wherein the optical card is formed of a resin at 0 to 90C. 4. A first adhesion improving layer (A layer) / a second adhesion improving layer (B layer) / a character / image information forming layer (C layer) on a hard coat layer provided on the surface of a transparent substrate. A) forming a layer A on the hard coat layer, and forming a layer C thereon while the layer A is in a semi-cured state. Forming a layer B made of a mixed substance of the layer A and the layer C at a contact portion between the layer A and the layer C. 5. The character / image information forming layer (C layer) wherein the first adhesion improving layer (A layer) is a urethane acrylate resin.
5. The method according to claim 4, wherein the resin comprises an acrylic resin or a vinyl chloride resin.
The manufacturing method of the optical card described in the above. 6. The character / image information forming layer (C layer) wherein the first adhesion improving layer (A layer) is a urethane acrylate resin.
Contains an acrylic polyol having a hydroxyl group capable of forming a urethane bond and a vinyl chloride resin.
The method for producing an optical card according to claim 4, wherein the optical card is made of a resin at 0 to 90C. 7. An information recording medium provided with a print receiving layer on a resin substrate, wherein the print receiving layer has a first surface remote from the substrate and a second surface close to the substrate. The print receiving layer is made of a composition different from that of the surface, and the print receiving layer is made of JIS K54.
An information recording medium characterized in that substantially no peeling occurs in the print receiving layer by the cross-cut tape method specified in No. 00. 8. A transparent substrate having an optical recording layer and a first protective layer in this order, wherein a second protective layer is formed on a surface of the transparent substrate opposite to a side facing the optical recording layer, In an information recording medium having a print receiving layer on at least one of the first protective layer surface and the second protective layer surface, the print receiving layer is provided on the first surface on the side away from the substrate and on the substrate. The print receiving layer is made of a composition different from that of the second surface on the near side.
An information recording medium, wherein substantially no peeling occurs in the print receiving layer according to the crosscut tape method specified in SK5400.