JP2010012734A - Watermark illegible correction tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a watermark illegible correction tape which has fundamental performance as a pressure-sensitive transfer correction tape, and free from transfer failure, wherein characters concealed by a reflective watermark or a permeable watermark in the front surface or the rear surface cannot be read. <P>SOLUTION: On a concealed layer, a printing layer is formed using a method of printing points, and then an adhesive layer is formed using a liquid ink for the adhesive layer so that thickness of the adhesive layer is thicker than thickness of a printing part in the printing layer. The printing layer has printing patterns which consist of a printing part, the area ratio of the printing patterns is ≥40%, and the printing patterns can make it impossible to read characters when the printing patterns are overlapped on black characters wherein height of the characters is 20 to 100% of the width of the printing patterns in the tape width direction. The color of the printing part is a color using a black ink, and the PCS value is 0.80 to 0.95 when the printing part of the color is measured from the side of a transparent PET to which a paint film for correction is pressure-sensitively transferred. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In order to conceal the characters output by the printer and to correct writing after concealment, the present invention can load the correction coating onto the character of the transfer target by loading it on the coating film transfer tool. The present invention relates to a pressure-sensitive transfer type correction tape that can be produced. In particular, the printed pattern under the masking layer does not show through on the surface of the correction coating film, and on the front and back surfaces of the black characters concealed on paper, whether it is a reflection watermark or a transmission watermark, It relates to things that cannot be read.

  Due to the recent development of computers and printers, texts created by computers are often output by printers. However, there are cases where typographical errors are noticed after they are output by printers, and the application for correcting typographical characters is expanding. In order to correct typos, it is preferred to use correction tapes instead of liquid correction solutions. This is because typographical errors can be corrected at a uniform thickness at any time, in addition to the correction tape not needing to be balled or dried like liquid correction fluid.

  As the correction tape, a pressure-sensitive transfer type correction tape that can be loaded into a coating film transfer tool and pressure-sensitive transfer of the correction coating film onto the characters of the transfer target is usually used. This is generally used by forming a coating film for correction with a uniform thickness on a substrate such as paper or film, cutting it into a fixed tape width, and loading it into a coating film transfer tool. To do. Thereby, the characteristic as a correction tape which does not exist in liquid correction liquid comes out. The correction coating film not only conceals characters but also has a performance that enables writing on the correction coating film.

  In printer output, black text is often output on white paper such as fine paper, and white correction tape is used, but the characters written on the correction coating are conspicuously noticed. In order to achieve this, a material (utility model registration No. 3131358) in which the hiding layer is colored with a colorant in a color other than white is also used. In addition, a pressure-sensitive transfer-type correction tape (Japanese Patent Application No. 2008-036987) with a pattern on the correction coating film has been developed in order to make the portion where the characters are concealed intentionally. Naturally, writing on the coating film for correction with a pattern is possible even though there is a pattern.

  On the other hand, due to concerns about leakage of personal information, a method of concealing personal information such as name and address with a correction tape may be used. Although it is possible to conceal text on paper with a correction tape on the desk, it is hidden from the back side of the text concealed on the paper by reflecting it through the light of a fluorescent lamp on the desk stand and seeing it through. There are cases where characters appear and characters can be read.

  In JP-A-6-092085, the layer corresponding to the pressure-sensitive adhesive layer of the present invention is colored for the purpose of providing a concealment correction transfer tape whose original characters are not readable even when viewed from the opposite side of the correction surface. However, if a colorant is added to the adhesive layer, the adhesive strength will be weakened, pressure-sensitive transfer to the transfer target will not be successful, and partial transfer will not be possible or the transferred coating will float. May end up. Such a transfer defect is called transfer failure. If the amount of coloring agent added is such that this transfer failure does not occur, sufficient concealment cannot be achieved, and it will be difficult to see from the opposite side of the correction surface, but the characters will be completely unreadable. It did not become a thing.

  In JP-A-10-309893, for the purpose of developing a correction transfer tape having higher concealability on the back side, a front-facing concealing layer corresponding to the concealing layer of the present invention and a back-facing concealing layer are additionally formed. Although the surface-facing concealing layer has a dark color such as black, it can be seen through, and even if it is a surface-facing concealing layer such as white, the modified part is gray or the like different from the adherend Sometimes it was visible, and it gave a sense of incongruity to the white correction tape. In addition, the concealing layer facing the back surface was exposed at the cut portion, and black color was conspicuous and seemed to be obstructive.

Japanese Patent Application Laid-Open No. 11-343467 not only has a high concealability on the back side, but also prevents the correction part from appearing in a color different from the adherend such as gray, and prevents black from being noticeable at the cut portion. In order to develop a correction transfer tape that is easy to use, a tape having a non-uniform facing-down concealing layer, or a striped, mesh, or dotted pattern has been developed.
Utility Model Registration No. 3131358 Japanese Patent Application No. 2008-036987 JP-A-6-092085 JP-A-10-309893 Japanese Patent Laid-Open No. 11-343467

  In the case of a normal correction coating film in which a concealing layer and an adhesive layer are formed on a substrate, the adhesive layer's adhesive force is superior to the adhesive force between the substrate and the concealing layer. The transfer is triggered by applying pressure from the back of the base material, and the base material and the concealing layer are peeled off, and the concealing layer and the adhesive layer are transferred to the transfer target. However, when a back-facing concealing layer such as JP-A-10-309893 and JP-A-11-343467 is formed between the concealing layer and the adhesive layer, the adhesion between the concealing layer and the back-facing concealing layer is Since a large amount of colorant is added to each layer, it becomes weaker than the adhesive strength of the adhesive layer. Further, if the back-facing concealing layer is made non-uniform, the adhesion force will vary. When pressure-sensitive transfer was applied to such a configuration from the back of the substrate, transfer defects were likely to occur. Further, as disclosed in JP-A-11-343467, when the back-facing concealing layer is provided in stripes, meshes, or dots, the adhesion area between the concealing layer and the back-facing concealing layer is further reduced. Moreover, it was easy for transfer defects to occur.

  On the other hand, those who want to get information try various things. It is not hard to predict that such a person will see light from various directions and see through it. If the back side of the character concealed with correction tape on paper is reflected or transmitted with strong light and viewed through it, the concealed character may appear and the character can be read. As described above, there is a problem that characters can be read on the back surface with a reflective watermark or a transparent watermark.

  The problem of the present invention is that it has basic performance as a pressure-sensitive transfer type correction tape, there is no transfer defect, and the watermark illegible correction in which the characters concealed with the reflection watermark and the transparent watermark on the front and back sides cannot be read Is to provide a tape.

  The present invention has a coating film for correction in which a concealing layer, a printing layer, and an adhesive layer are formed in this order on a base material, and this is cut into a tape width and coated in a tape shape. In a correction tape that can be loaded into a film transfer tool and pressure-sensitively transfer the correction coating film onto the character of the transfer target, the printing layer is formed on the concealment layer using a method of printing dots, After that, the pressure-sensitive adhesive layer is formed with a liquid pressure-sensitive adhesive layer ink so that the thickness of the pressure-sensitive adhesive layer is larger than the thickness of the printed portion of the printed layer. The printed layer does not show through the concealing layer, and the printed layer has a printed pattern composed of a printed portion, and the printed pattern has an area ratio of 40% or more. Black characters whose height is 20% or more and 100% or less of the printed pattern width in the tape width direction When the printed pattern is stacked, it is a printed pattern that can make the character unreadable, and the color of the printed part is a color using black ink. The PCS value measured from the pressure-sensitive transferred transparent PET side is 0.80 or more and 0.95 or less.

  The correction tape of the present invention has the basic performance that it can completely conceal the characters to be concealed and can be written on the correction coating film without bleeding even with water-based ink. It is possible to read characters concealed with reflective or transparent watermarks on the front and back surfaces without causing improper pressure-sensitive transfer, resulting in partial transfer failure or transfer failure that the transferred coating film floats. It became an unreadable watermark readable correction tape.

  FIG. 1 is a cross-sectional view of a watermark illegible correction tape 1 of the present invention. A correction coating film 3 is provided on the base material 2, and the correction coating film 3 is formed by forming a concealing layer 4, a printing layer 5, and an adhesive layer 6 in this order on the base material 2. The print layer 5 includes a print portion 7 formed by printing and a portion 8 without printing. The print portion 7 is represented by halftone dots. Although the part 8 without printing will be described in detail later, a liquid adhesive layer ink enters into the adhesive layer 6. Therefore, the concealing layer 4 and the adhesive layer 6 are in direct contact with each other in the portion 8 where there is no printing.

  In the figure, the vertical and horizontal scales in the figure are different. As the thickness in the vertical direction, the substrate 2 is assumed to be 12 μm, the concealing layer 4 is 20 μm, the printed portion 7 of the printed layer 5 is 1 μm, and the adhesive layer 6 is 3 μm including the printed portion 7 of the printed layer 5; The correction coating film 3 on which the concealing layer 4, the printing layer 5, and the adhesive layer 6 are formed has a thickness of 23 μm. As a horizontal direction, this sectional view shows a case where both ends are cut to a constant tape width, and a tape width of 5 mm is assumed.

  The watermark-unreadable correction tape 1 cut into a tape width and cut into a tape shape is loaded into a coating film transfer tool, and the correction coating film can be pressure-sensitive transferred onto the character of the transfer target. FIG. 2 is a cross-sectional view of the correction coating film pressure-transferred. Although not shown in the figure, the lower side is a transfer object. On top of that, the correction coating film 3 comprising the adhesive layer 6, the printing layer 5, and the concealing layer 4 is sequentially pressure-sensitive transferred. In such a state, the characters of the transfer object are concealed and can be written on the correction coating film 3. Further, in the portion 8 where there is no printing, the hiding layer 4 and the adhesive layer 6 are in direct contact.

  Base material 2 is polyethylene terephthalate (PET), polyethylene naphthalate, polypropylene, polycarbonate, polystyrene, polyamide, polyamideimide, polyethylene, polyvinyl chloride, and other plastic films, glassine paper, artificial resin film, paper Japanese paper A film-like material such as these, or a composite film-like material thereof can be used. The thickness of the substrate is preferably about 3 to 100 μm. If the thickness of the substrate is large, the transfer pressure at the time of transfer may decrease and transfer failure may occur. Conversely, if the thickness of the substrate is small, the strength of the tape will be weak and the tape may be torn. Trouble may occur. The base material is preferably subjected to double-sided peeling treatment. Peeling treatment consists of silicon resin, fluororesin, other peelable resin or oil as the main component and, if necessary, non-peelable synthetic resin, fine particles, additives, etc., mixed with gravure coating or It is applied by a method such as die coating.

  The masking layer 4 can be formed by preparing a liquid masking layer ink and applying and drying it on the substrate 2 using a general coater or the like. The liquid masking layer ink is prepared by uniformly mixing a pigment, a vehicle, and, if necessary, a dispersant or an additive in an organic solvent with a disperser or a stirrer. If the pigment ratio in the formed masking layer 4 is less than 75% by weight, it takes time for the writing tool ink to soak and fix when writing on the masking layer with a writing tool such as water-based ink. It will occur. In addition, characters that should be concealed may be seen through, or the surface of the correction coating after pressure-sensitive transfer may become glossy. On the other hand, if the pigment ratio is more than 90% by weight, it may cause cracking when pressure-sensitive transfer is performed, or may cause a choking phenomenon that causes white staining when touched with a correction coating film after pressure-sensitive transfer. Or Therefore, the pigment ratio in the hiding layer 4 is preferably 75% by weight or more and 90% by weight or less.

  The pigment of the masking layer 4 is composed of a white pigment, a colored pigment or a combination thereof, and a filler. As the white pigment, titanium oxide is generally used. Color pigments include organic pigments and inorganic pigments. Organic pigments include azo lake red, quinacdrine red, fast yellow, slen yellow, phthalocyanine green, phthalocyanine blue, dioxazine violet, and inorganic pigments such as dial, chrome vermilion, chrome lead, oxide yellow, and chrome oxide green. , Bitumen and ultramarine. These can be used alone or in combination. As the filler, extender pigments such as magnesium carbonate, calcium carbonate, silica, talc, kaolin and diatomaceous earth are used. As the vehicle to be mixed with the pigment, resins such as urethane, acrylic, vinyl, olefin, and rubber can be used singly or as a mixture of several kinds.

  The print layer 5 is formed using a method of printing dots on the masking layer 4. The printed portion 7 of the print layer 5 in FIGS. 1 and 2 is a collection of printed points. The printing layer 5 is composed of the printing portion 7 and the non-printing portion 8. Any printing method may be used as long as dots can be formed. Specific examples include gravure printing, screen printing, and inkjet printing.

  FIG. 3 schematically shows the correction coating film 3 pressure-sensitively transferred to a transparent transfer body such as transparent PET, with the printing portion 7 of the printing layer 5 enlarged through the transparent transfer body. The printed portion 7 is formed by a printed point 9 and a gap 10 without dot printing. Although the details of the gap 10 will be described later, a liquid adhesive layer ink enters into the adhesive layer 6.

  In FIG. 3, the point 9 is represented by a circle and a circle diameter of 0.3 mm is assumed. However, depending on the printing method and conditions, the shape may be other than a circle (rhombus or other polygon). Therefore, if the maximum line segment connecting the two vertices is expressed as the maximum length of the point, the printed pattern of the printed layer is the letter. Therefore, the maximum length of the dots is preferably 0.01 mm or more and 1.0 mm or less. In the current printing method, it is difficult to make it smaller than 0.01 mm, and if it is larger than 1.0 mm, there may be a case where a printed pattern that makes the character unreadable is not obtained. Although FIG. 3 shows the case where the circular points 9 are arranged in an orderly manner, there are cases where the dots are not arranged in an orderly manner or the adjacent points are overlapped depending on the printing method or conditions. Depending on the size and number of points 9, the color density can be changed.

  The adhesive layer 6 is formed by a liquid adhesive layer ink after the printing layer 5 formed on the concealing layer 4. The adhesive layer 6 is formed by applying and drying with a general coater using a liquid adhesive layer ink. As the liquid adhesive layer ink, it is possible to use acrylic, rosin, rubber, vinyl ether, polyisobutylene, and other resins that are generally handled as adhesives. If necessary, you may mix | blend a filler, an adhesive property modifier, an anti-aging agent, etc. In order to obtain sufficient adhesive properties, the thickness of the adhesive layer 6 is preferably 1 μm or more and 20 μm or less. If the thickness is small, sufficient adhesive properties cannot be obtained. If the thickness is large, when the layers are bonded together, the portions will rise, and the appearance will deteriorate.

  The printing portion 7 of the printing layer 5 uses a method of printing dots, and is formed from the dots 9 printed as shown in FIG. 3 and the voids 10 without dot printing. Thereafter, the pressure-sensitive adhesive layer 6 is formed with a liquid pressure-sensitive adhesive layer ink so that the thickness of the pressure-sensitive adhesive layer 6 is larger than the thickness of the printed portion 7 of the print layer 5. Then, the liquid adhesive layer ink also enters the gap 10, and the gap 10 becomes the adhesive layer 6. When the thickness of the adhesive layer 6 is smaller than the thickness of the printed portion 7 of the printed layer 5, the adhesive having a thickness smaller than the printed portion 7 of the printed layer 5 can be obtained even though the liquid adhesive layer ink can enter the gap 10. Only the layer 6 can be formed, and the printed portion 7 comes out more than the pressure-sensitive adhesive layer 6, and the pressure-sensitive transfer cannot be performed well.

  In this way, in order, on the base material 2, the one having the correction coating 3 in which the concealing layer 4, the printing layer 5, and the adhesive layer 6 are formed is cut into a certain tape width, Wrap it around a core, etc. to make a small roll, and load it onto the coating film transfer tool. The fixed tape width is generally between 3 mm and 12 mm, but may have a width other than this. The figure assumes a tape width of 5 mm. Using the loaded coating film transfer tool, the correction coating film can be pressure-sensitive transferred onto the character of the transfer target.

  The hiding layer and the printing layer are configured so that the printing layer is not seen through the hiding layer from the surface of the pressure-sensitive transfer coating film for correction. If the printed layer is seen through the concealing layer, the appearance of the correction coating film is deteriorated, and the characters written on the correction coating film become dull. If the amount of the colorant used in the masking layer is increased, the printed pattern under the masking layer can be prevented from being seen through, but the basic performance required for the coating film for correction such as writing property is deteriorated. Therefore, the concealing layer is not significantly different from the conventional one, and the printed layer is improved to have the characteristics so that it does not show through the concealing layer while maintaining the basic performance required for the correction coating film. ing.

  FIG. 4 is an example of the printed pattern 11 that can make the character unreadable. The print pattern 11 is composed of the print portion 7 of the print layer 4. In this figure, the printed portion 7 is a black portion. The vertical direction in the figure is the tape width direction, and the width of the printed pattern 11 is 5 mm which is the same as the tape width. For easy understanding, a 5 mm scale is shown on the left side of the figure. Needless to say, this scale is not the printed pattern 11. The horizontal direction in the figure is the tape length direction. Here, FIG. 1 and FIG. 2 show cases in the A-A ′ cross section.

  After the printing layer having the printed pattern 11 is formed, the adhesive layer is formed with a liquid adhesive layer ink so that the thickness of the adhesive layer is larger than the thickness of the printed portion 7 of the printing layer. Then, the liquid adhesive layer ink also enters the unprinted portion 8, and the unprinted portion 8 becomes an adhesive layer. Therefore, the concealing layer and the adhesive layer are in direct contact with this portion. And as demonstrated in the said FIG. 3, the space | gap 10 without the dot printing of the printing part 7 is an adhesion layer. As described above, since the adhesive layer exists in the printed portion 7 and in the non-printed portion 8, even if the printed layer exists between the concealing layer and the adhesive layer, the layer interface with the concealing layer is present. The adhesive strength of the film does not become weak, and transfer defects do not occur.

  The area ratio of the printed pattern is an area per unit area of the printed pattern. The area ratio of the printed pattern 11 in FIG. 4 is 88%. If the area ratio of the printed pattern is smaller than 40%, the pattern cannot be made unreadable. Note that the printed pattern has an area ratio of 100%, which is a solid pattern. With a solid pattern with an area ratio of 100%, the white of the surface of the concealing layer may not be gray depending on the darkness of the black, but it may become dull white. More preferably. In addition, when the area ratio of the printed pattern is small, it is difficult to devise a pattern that makes the character unreadable, so the area ratio is preferably 60% or more in order to easily devise the pattern. In order to devise a handle more easily, the area ratio is more preferably 80% or more. When such printed patterns are stacked, it is possible to make the character unreadable.

  Specifically explaining that the character is unreadable, in the black character composed of the arrow symbol “→” and the three characters “A” as shown in FIG. 5, the three characters “ If the printed pattern 11 in FIG. 4 is overlaid on “That”, it is impossible to know what the characters are. Such a state is a state in which the character cannot be read.

  Characters that can be made unreadable by overlapping printed patterns have a size in which the height of the characters is 20% to 100% of the printed pattern width in the tape width direction. In the case of FIG. 4, since the printed pattern width is 5 mm, the character height is 1 mm or more and 5 mm or less. If the characters have a height within this range, they can be made unreadable by overlapping printed patterns.

  FIG. 6 is a diagram in which the printed pattern 11 of FIG. 4 is superimposed on characters having a character height of 20% (1 mm) and 100% (5 mm). The 5 mm scale of the printed pattern width is shown on the upper left of FIG. The right side is the one whose character height is 20% (1 mm) of the printed pattern width, and the right side is the one whose character height is 100% (5 mm) of the printed pattern width. On the other hand, in the lower part of FIG. 6, the printed pattern 11 of FIG. Note that when looking up and down in FIG. 6 repeatedly, a large character appears to float due to an afterimage effect even when the printed pattern 11 is superimposed.

  FIG. 7 is an example of another printed pattern. The area ratio of this printed pattern is 86%. As in the lower part of FIG. 5, the printed pattern is superimposed on the three characters “A”. It is in a state where it is impossible to understand what the character is and the character cannot be read. It should be noted that it is best if all characters can be made unreadable, but if only making it unreadable, it is sufficient that the meaning of the sentence cannot be read in a sentence composed of a plurality of characters. That is, even if one or two characters are not illegible, the purpose can be achieved if a sentence composed of those characters cannot be read.

  The correction tape is often used to correct characters on paper output by a laser printer or the like. In this case, the relationship is black characters on white paper. Therefore, the hiding layer is preferably white and the handle is preferably black. However, if the black is too dark, the pattern will be seen through the masking layer. Therefore, the darkness of the black is slightly reduced so that the pattern is not seen through the concealing layer so that the character cannot be read. The darkness of the black is determined by the PCS value.

  PCS is a print contrast signal, and the PCS value is defined by (reflectance of white background−reflectivity of black characters) / (reflectance of white background). Since the pattern cannot be measured when the transfer body is opaque paper, the PCS value measured through the transparent PET after pressure-sensitive transfer of the correction coating film to the transparent PET is used. If the PCS value is greater than 0.95, the black pattern will be too dark and the pattern will show through the masking layer. If the PCS value is less than 0.80, the image becomes too grayish and characters output by a laser printer or the like cannot be made unreadable. Therefore, the PCS value is preferably 0.80 or more and 0.95 or less. Furthermore, when matching with white paper, a PCS value of 0.85 or more and 0.90 or less is more preferable. In addition, the filter A is used for measurement of a PCS value using Macbeth PCM-II.

  The darkness of the black can be reduced by mixing the black ink with another color, such as white ink, or by adjusting the plate in the case of gravure printing. Can do. To further adjust the plate, the shape of the point 9 and the gap 10 in FIG. 3 is changed. In this way, the PCS value can be set to an appropriate range by adjusting the darkness.

  Using this ink, a concealing layer ink is dispersed by a disperser in a toluene solution at the following blending ratio on a PET film having a thickness of 12 μm subjected to double-sided peeling treatment, and uniformly mixed. Then, a concealing layer was formed so that the thickness after coating and drying with a reverse roll coater would be 20 μm. The blending ratio of the concealing layer ink is 80% by weight in solid content, including titanium oxide (Taypure R931 “DuPont Co., Ltd.”) as a white pigment and silica (Gasil Silica 200DF “manufactured by INEOS Silicones”) as a filler. Styrene / butadiene block copolymer (Asaflex 805 “Asahi Kasei Chemicals Co., Ltd.”) and styrene / butadiene / styrene block copolymer (Clayton 1101JS “Clayton Polymer Co., Ltd.”) combined with a solid content of 18% by weight. The molecular surfactant (homogenol L-18 “Kao Co., Ltd.”) is 2% by weight in terms of solid content. Accordingly, the pigment ratio is 80%.

  The printed pattern shown in FIG. 4 (print pattern area ratio of 88%) was formed on the concealing layer using a gravure printing method. Using a gravure printing ink (a mixture of 80% VS-SANS black and 20% white manufactured by Osaka Printing Ink Manufacturing Co., Ltd.), the printed portion of the printed layer was printed and formed to a thickness of 1 μm. Then, using an acrylic adhesive (Nicazole TS-1523 “Nippon Carbide Industries Co., Ltd.”) as the liquid adhesive layer ink, the adhesive layer was coated with a reverse roll coater to a thickness of 3 μm after drying. Formed.

  This was cut into a tape shape having a width of 5 mm and a length of 10 m, and the core was cut into a small volume and loaded into a coating film transfer tool (Union Scimouse HG manufactured by Union Chemica). Using this, the correction coating film pressure-sensitively transferred onto the transparent PET was measured from the transparent PET side, and the PCS value was 0.90.

  Change to gravure printing ink (VS-SANS black 100% manufactured by Osaka Printing Ink Manufacturing Co., Ltd.). Otherwise, each layer was formed in the same manner as in Example 1, and the same tape shape was transferred to the coating film. Loaded into the tool. Using this, the correction coating film pressure-sensitively transferred onto the transparent PET was measured from the transparent PET side, and the PCS value was 0.95.

  Change to gravure printing ink (VS-SANS black 70% and 30% white mixed by Osaka Printing Ink Manufacturing Co., Ltd.). This was loaded into a coating film transfer tool. Using this, the correction coating film pressure-sensitively transferred onto the transparent PET was measured from the transparent PET side, and the PCS value was 0.80.

  The correction coating film of each example was pressure-sensitive transferred onto a character (character height of 2.8 mm) output on a paper by a laser printer and observed. In all the examples, the output characters could be completely concealed, and writing could be performed without bleeding with aqueous ink on the correction coating film. Further, the printed layer was not seen through the surface of the correction coating film through the concealing layer. Immediately after the transfer and after a week, no transfer failure occurred. Furthermore, even if a reflective watermark or a transparent watermark is applied on the front and back surfaces, the concealed characters cannot be read.

Sectional drawing of the watermark illegible correction tape of this invention. Sectional drawing of the coating film for correction which carried out the pressure-sensitive transfer. The schematic diagram which expanded the printing part of the printing layer. An example of an unreadable print pattern. Explanatory drawing of unreadable. Explanatory drawing of 20% in height and 100% characters unreadable. Examples of other unreadable print patterns.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Watermark illegible correction tape 2 Base material 3 Correction coating film 4 Hiding layer 5 Print layer 6 Adhesive layer 7 Print part 8 No print part 9 Point 10 Space | gap 11 Print pattern

Claims (1)

It has a coating film for correction in which a concealing layer, a printing layer, and an adhesive layer are formed in order on the base material. In the correction tape that can be loaded and pressure-sensitive transfer the correction coating film onto the character of the transfer object,
On the concealing layer, the printing layer is formed using a method of printing dots, and then the adhesive layer is formed with a liquid adhesive layer ink so that the thickness of the adhesive layer is larger than the thickness of the printed portion of the printing layer. ,
The hiding layer and the printing layer are configured so that the printing layer is not seen through the hiding layer from the surface of the pressure-sensitive transfer coating film for correction,
The printed layer has a printed pattern composed of printed portions, the area ratio of the printed pattern is 40% or more, and the height of characters is 20% to 100% of the printed pattern width in the tape width direction. When a printed pattern is superimposed on a character, the printed pattern can make the character unreadable.
The color of the printed part is a color using black ink, and the PCS value measured from the transparent PET side on which the correction coating film is pressure-sensitively transferred has a PCS value of 0.80 or more and 0.95 or less. A watermark illegible correction tape characterized by being.

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