JP6476512B2 - Pressure sensitive correction tape - Google Patents

Description

  The present invention relates to, for example, a pressure-sensitive correction tape used to correct writing and printing on paper.

For example, writing on paper with an oil-based ballpoint pen, gel ink ballpoint pen, marker pen, etc., or printing on paper with a laser printer etc. is corrected, that is, these writings and printing are concealed or concealed and then writing is newly made. A pressure sensitive correction tape is used to
As a pressure-sensitive correction tape, what laminated | stacked the correction layer and the adhesion layer in this order on the single side | surface of the base material by which the mold release process was carried out is mentioned. Such a pressure-sensitive correction tape is generally used in a state of being loaded into a transfer tool also serving as a holder, which is wound into a roll.

That is, the pressure-sensitive correction tape loaded in the transfer tool is pressed from the back side of the substrate by the blade-like head provided on the transfer tool to maintain the pressure-sensitive adhesive layer in pressure contact with the paper surface. Move it up.
Then, the pressure-sensitive correction tape is sequentially fed from the roll and the correction layer is sequentially peeled off from the base material, and transferred and pressure-bonded onto the sheet by the pressure contact force of the head and the adhesive force of the adhesive layer, thereby writing or printing on the sheet Is concealed.

The correction layer includes at least a layer (hereinafter referred to as "white layer") in which 99 % by mass or more of the total amount of coloring agents has white color, which has the ability to hide writing or printing on paper, ie, hiding ability. Is used.
The white layer is a layer bound with a binder resin with a coloring agent containing a white pigment such as titanium oxide in the above proportion, and such a layer improves the concealability as the thickness increases, so writing or printing on the paper surface In order to sufficiently hide the thickness, it is common to set the thickness to a relatively large value. Specifically, the thickness of the white layer is generally 15 μm or more, particularly 20 μm or more.

Usually, the white layer is formed by applying a coating solution containing a white pigment and the like and a binder resin onto a base and then drying the coating. In order to increase the thickness of the white layer, the coating thickness of the coating solution may be increased.
However, as the coating thickness of the coating liquid increases, the time required for drying takes longer, and there is a problem that the drying step becomes a rate-limiting step and productivity of pressure-sensitive correction tape production is reduced.
Furthermore, since there is a limit to the thickness of the coating that can be dried, the thickness of the white layer, and hence the hiding power of the white layer, is naturally limited, and there are cases where satisfactory hiding power can not be obtained with the current thickness.

Therefore, instead of increasing the thickness of the white layer, it has been considered to laminate the colored layer that is colored according to the color of the writing or printing to be concealed under the white layer to compensate for the concealability, etc. Patent Document 1 etc.).
In addition, the ink bleeds from the writing or printing on the paper to the correction layer and becomes visible through the correction layer over time, that is, to prevent the concealability of the correction layer from decreasing with time, the ink It has also been studied to stack a barrier layer having so-called bleed resistance under the white layer, and the like, which has the property of preventing the further bleeding by stopping the layer in the layer (Patent Documents 2 and 3 and the like).

However, in the case of the former, in the state where the opposite color layers of the white layer and the dark colored layer such as black are laminated, the color of the colored layer is concealed to maintain the whiteness of the surface. In order to do so, the white layer must have sufficient hiding power, so its thickness must still be in the range of 15 μm or more as described above.
In the latter case, since the barrier layer itself is colored in the color when the ink bleeds, the white layer thereon must still have sufficient concealability, and the thickness of the white layer is still It is necessary to be in the range of 15 μm or more described above.

Therefore, in any case, the drying process of the coating solution which is the basis of the white layer is the rate-limiting step, and the productivity of pressure-sensitive correction tape production can not be improved at present.
That is, when laminating a white layer and a colored layer, or a white layer and a barrier layer on a substrate, a coater for a coating solution which is the basis of each layer while feeding a long substrate at a constant feed rate It is common to use a continuous coating device which passes through the dryer and the dryer in sequence.

  However, it takes time to dry the thick white layer, and it is necessary to limit the feed speed of the substrate in the entire device to secure such drying time, resulting in the production of pressure-sensitive correction tape production. It is practically difficult to improve the sex.

Japanese Patent Application Laid-Open No. 10-309893 Japanese Patent Publication No. 2003-507523 JP, 2007-83627, A

  An object of the present invention is to provide a pressure-sensitive correction tape which is excellent in productivity because the formation time of the white layer constituting the correction layer is short and which is excellent in the hiding ability of writing and printing on a sheet.

According to the present invention, a correction layer having a laminated structure of two or more layers and an adhesive layer are laminated in this order on one side of a substrate subjected to mold release treatment, and the correction layer contains a colorant and the total amount of the colorant The pressure-sensitive correction tape includes at least two white layers with a thickness of 8 μm or less, of which at least 99% by mass of the white pigment is a white pigment.

According to the present invention, by dividing the white layer constituting the correction layer into two or more layers each having a thickness of 8 μm or less, the drying time of the coating solution which is the basis of each white layer, and hence the formation of each white layer Time can be shortened than ever.
Therefore, for example, in the case of using the continuous coating apparatus described above, the feed speed of the substrate in the entire apparatus can be increased more than ever to improve the productivity of the pressure-sensitive correction tape.

In addition, by laminating two or more white layers with a thickness of 8 μm or less, the total thickness of the plurality of white layers is equal to or greater than that of the conventional thick white layer, and good concealment for pressure-sensitive correction tape Can be given.

According to the present invention, a correction layer having a laminated structure of two or more layers and an adhesive layer are laminated in this order on one side of a substrate subjected to mold release treatment, and the correction layer contains a colorant and the total amount of the colorant The pressure-sensitive correction tape includes at least two white layers with a thickness of 8 μm or less, of which at least 99% by mass of the white pigment is a white pigment.
«Modification layer»
The correction layer may be composed of only two or more white layers having a thickness of 8 μm or less, or the white layer of the two or more layers and, for example, disposed on the surface side of the correction layer, writing on the correction layer Writing layer with absorbency to the
A sliding layer disposed on the surface side of the correction layer and having slipperiness with respect to the pen point
-Adjustment layer for adjusting the flexibility of the correction layer, the followability to the substrate, or the film cutting property ,
-A barrier layer having bleed resistance to ink written or printed on a sheet of paper,
A colored layer colored in accordance with the color of the writing or printing subject to be corrected, and a printed layer on which a pattern for preventing reading of the writing or the print is printed.
And at least one layer selected from the group consisting of

In each of the layers described above, at least one of the writing layer, the sliding layer, the adjustment layer, and the barrier layer contains a colorant in which at least 99 % by mass of the total amount is a white pigment, It can also serve as at least one of the white layers.
When the correction layer is formed of only a normal white layer, there is an advantage that the structure of the pressure-sensitive correction tape can be simplified to improve the productivity.

On the other hand, when a white layer is combined with the above layers, or at least one of the layers is a white layer, there is an advantage that a pressure-sensitive correction tape further excellent in characteristics can be provided by providing each function.
Which one of these is adopted may be appropriately selected depending on whether the pressure-sensitive correction tape is required to have productivity or some additional function.

"White layer"
The white layer can be formed in the same manner as in the prior art except that the thickness is 8 μm or less, and two or more layers are laminated. That is, each white layer is formed by applying a coating solution containing at least 99% by mass or more of a colorant which is a white pigment and a binder resin on a substrate and then drying it.
At this time, since the thickness of each white layer is as thin as 8 μm or less, the time required for drying can be shortened more than ever. In particular, when using the continuous coating apparatus described above, by increasing the feed rate of the substrate in the entire apparatus than ever before, even if it is a correction layer including, for example, three or more multi-layered white layers, The pressure sensitive correction tape can be manufactured with high productivity without lowering.

The thickness of each white layer can be optionally set within the range of 8 μm or less according to the number of white layers to be laminated, the total thickness of the white layers, etc., but the application and drying of the coating solution described above In order to form a continuous white layer having a constant thickness without causing blur or the like in the step of forming the white layer by the above, the thickness of each white layer is preferably 1 μm or more, particularly 3 μm or more .

The total thickness of the two or more white layers is basically preferably 15 μm or more in order to ensure sufficient concealability, but for example, when combined with a colored layer etc., the total thickness of the white layers May be below this range.
<Colorant>
(White pigment)
Among the colorants, as the white pigment, any of various white pigments capable of securing the hiding power required for the white layer can be used, and titanium oxide having excellent hiding power is particularly preferable. Further, as titanium oxide, any of various types of titanium oxide such as rutile type and anatase type can be used.

The titanium oxide may be rutile type titanium oxide, manufactured by DuPont Co., Ltd. Thai Pure (registered trademark) R-101, R-103, R-104, R-105, R-350, R-706, R- 1 type, or 2 or more types, such as 741, R-746, R-796 +, R-900, R-902 +, R- 931, R- 960, etc. are mentioned.
The titanium oxide preferably has an average particle diameter of 0.1 μm or more, and preferably 2 μm or less, in consideration of imparting good concealability to the white layer.

The content of titanium oxide is preferably 40% by mass or more, particularly preferably 45% by mass or more, and more preferably 85% by mass or less, particularly preferably 65% by mass or less, based on the total amount of solids forming the white layer. .
If the blending ratio of titanium oxide is less than this range, the hiding power of the white layer may be insufficient. Further, when the blending ratio of titanium oxide exceeds the above range, the ratio of other components forming the white layer is relatively short, and for example, the film strength by the binder resin may be reduced.

In addition, it is preferable to make it the compounding ratio similar to the above also about other white pigments other than a titanium oxide. Moreover, when using coloring agents other than white demonstrated below, it is preferable to make the compounding ratio of the sum total of the coloring agent containing a white pigment into said range.
(Other coloring agents)
The white pigment such as titanium oxide is generally used as the pigment since the correction target is usually white paper, but, for example, in the case of using colored paper as the correction target, the white pigment In addition, colorants of any color other than white according to the color of the colored paper may be used in combination.

  Examples of coloring agents other than white include inorganic pigments such as titanium yellow, iron oxide pigments, ultramarine blue, cobalt blue, chromium oxide green, yellow lead, chromium vermillion, cadmium yellow, cadmium red, azo lakes, Hansa, benz One or more kinds of organic pigments such as imidazolones, monoazos, pyrazolones, condensed azos, phthalocyanines, quinacridones, perylenes, dioxazines, anthraquinones, isoindolinones, etc. may be mentioned.

Further, as a coloring agent other than white, a dye of each color, or a color adjusting agent such as aluminum powder, copper powder, brass powder or dye may be blended.
A coloring agent other than the white pigment can be blended in accordance with the color and the like required for the white layer. However, in consideration of imparting high concealability to the white layer and adjusting to the color tone of the paper which is usually light, as described above, at least 99% by mass of the total amount of the colorant including the white pigment is the white pigment It needs to be.

<Binder resin>
As the binder resin, any film forming resin can be used.
However, considering that the flexibility of the white layer and the followability to the base material and the white layer and thus the film cutting property of the correction layer are well balanced, the working temperature range of the pressure-sensitive correction tape particularly as the binder resin of the white layer In general, it is preferable to use in combination a rubbery resin exhibiting rubbery elasticity at room temperature and a glassy resin exhibiting a glassy shape having a small elongation in the use temperature range.

In addition, when the head and the pressure-sensitive correction tape are separated from the paper surface after the correction layer including the white layer is transferred onto the paper surface, the film cut-off property is the end on which the correction layer is transferred and the unused pressure-sensitive correction tape side. This indicates that the correction layer on the paper does not protrude backward from the final position of transfer (the position where the head is pulled away) from the untransferred front end of the sheet.
By using the above-mentioned binder resin in combination, the flexibility and the followability to the base material are improved while maintaining the good film cutting properties of the white layer and thus the correction layer, for example, winding a pressure-sensitive correction tape into a roll or a roll It can prevent that the said correction layer carelessly peels from a base material at the time of delivering | sending out etc.

(Rubber-like resin)
As a rubbery resin, it can be dissolved or dispersed well in the solvent contained in the coating solution which is the basis of the white layer to prepare a coating solution as uniform as possible, and the flexibility of the white layer and the followability to the substrate Any of various rubber-like resins that can improve can be used.
Such rubbery resin includes, for example, styrene-ethylene butylene-styrene (SEBS) block copolymer, styrene-ethylene propylene-styrene (SEPS) block copolymer, styrene-ethylene propylene (SEP) block copolymer, styrene- Ethylene-ethylene-propylene (SEEP) block copolymer, styrene-ethylene-ethylene-propylene-styrene (SEEPS) block copolymer, styrene-butadiene-styrene (SBS) block copolymer, styrene-isoprene-styrene (SIS) block Elastomers such as copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, chlorosulfonated polyethylene, or styrene-butadiene copolymer rubber (SBR), urethane rubber, air Rironitoriru - butadiene copolymer rubber (NBR), cyclized rubbers, and one or more rubbers such as butadiene rubber.

As the rubbery resin, there are an oil-extended type in which process oil is added to enhance flexibility and a non-oil-expanded type in which it is not added, either of which may be used.
As such a rubbery resin, SEBS block copolymer is preferable from the viewpoint of the balance between the flexibility of the white layer and the followability to the base material and the film severability.
As the SEBS block copolymer, for example, Tuftec (registered trademark) H1221 (S / EB ratio: 12/88, non-oil spread) manufactured by Asahi Kasei Chemicals Corporation, H1062 (S / EB ratio: 18/82, non-oil) Exhibition], H1052 [S / EB ratio: 20/80, non-oil extended], H1053 [S / EB ratio: 29/71, non-oil extended], H1041 [S / EB ratio: 30/70, non-oil extended] H1051 [S / EB ratio: 42/58, non-oil extended], H1517 [S / EB ratio: 43/57, non-oil extended], H1043 [S / EB ratio: 67/33, non-oil extended], N504 [S / EB ratio: 30/70, non-oil extended], H1272 [S / EB ratio: 35/65, oil extended, oil content: 36% by mass] and the like.

In the case of a standard white layer using an elastomer such as an SEBS block copolymer, for example, the blending ratio of the rubbery resin is 8% by mass or more, particularly, in the total amount of solid components forming the white layer, considering the above balance. The content is preferably 10% by mass or more, more preferably 15% by mass or less, and particularly preferably 13% by mass or less.
When a rubber is used as the rubbery resin, it is preferable to blend a crosslinking agent and, for example, to crosslink the coating solution in a drying step after coating.

(Glassy resin)
The glassy resin is preferably, for example, a resin having a small elongation and a high melting point or softening point of 100 ° C. or higher.
As such a glassy resin, for example, a saturated or unsaturated alicyclic hydrocarbon resin, a polyester resin, a styrene-acrylic copolymer, a ketone resin, a vinyl chloride-vinyl acetate copolymer, a polyolefin resin such as polyethylene, polypropylene and the like Etc. 1 type or 2 types or more are mentioned.

In particular, alicyclic hydrocarbon resins and polyester resins are preferable.
As polyester resin,
It can be well dissolved or dispersed in the solvent contained in the coating solution which is the basis of the white layer to prepare a coating solution as uniform as possible,
・ In particular, the film strength of the white layer is weak due to the low non-hardened high molecular weight type and the film strength of the white layer is weakened and so-called easy collapsibility which is easily broken by external force is suppressed to strengthen the film strength. Any of various polyester resins capable of imparting properties can be used.

Among them, as the polyester resin, it is preferable to use one having a tensile elongation at break at 23 ° C. of 25% or less, in particular 10% or less, particularly 5% or less, measured according to ASTM D638. By selectively using such a polyester resin having a small tensile elongation at break, the film-breaking property of the above-described white layer and thus the correction layer can be improved.
However, if the tensile elongation at break of the polyester resin is too small, the film breakage becomes too strong, and there is a possibility that the correction layer may be cracked at the time of transfer onto the paper surface. % Or more, particularly preferably 3% or more.

As the polyester resin, it is preferable to use one having an acid value of 5 mg KOH / g or less, particularly 3 mg KOH / g or less. By selectively using such a polyester resin having a small acid value, and thus a large molecular weight and a small ink absorbability, the white layer itself can be provided with the above-mentioned bleed resistance.
In addition, as described above, by selectively using a polyester resin having a large molecular weight and excellent film forming properties and strong binding power, the disintegrability of the white layer is suppressed, and the film strength is enhanced, for example, transfer onto the paper surface It is possible to prevent the correction layer including the white layer from being broken down when writing on the time or the correction layer.

However, if the acid value of the polyester resin is too small, the solubility in a solvent and the dispersibility may be reduced, and a uniform coating solution may not be obtained. Therefore, the acid value is preferably 1 mg KOH / g or more.
As such polyester resin, for example, Eletel (registered trademark) UE 3200 (tensile elongation at break: 4%, acid value: 1 mg KOH / g) manufactured by Unitika Co., Ltd., UE 3201 [tensile elongation at break: 4%, acid value: 2 mg KOH] / G], UE3202 [tensile elongation at break: 10%, acid value: 2 mg KOH / g], etc. One or two or more can be mentioned.

In the case of a standard white layer using, for example, a polyester resin, the blending ratio of the glassy resin is preferably 7% by mass or more, particularly preferably 9% by mass or more in the total amount of solid components forming the white layer. It is preferred that the content is at most mass%, particularly at most 11 mass%.
When the blending ratio of the polyester resin is less than this range, the binding power by the polyester resin is reduced, the disintegrability of the white layer is increased, and the film strength is reduced, for example, at the time of transfer on paper or on the correction layer. When writing, etc., the correction layer including the white layer may be easily broken. In addition, there is a possibility that the film breakage resistance, the bleed resistance, the writing density and the like may be lowered.

On the other hand, when the proportion of the polyester resin exceeds the above range, the proportion of the rubber-like resin becomes relatively small, so there is a possibility that the above-mentioned effects can not be sufficiently obtained by blending the rubber-like resin. . In addition, the ratio of the white pigment may be relatively decreased to lower the hiding power.
<Other ingredients>
In the white layer, for example, one or two or more kinds of extender pigments such as magnesium carbonate, calcium carbonate, barium carbonate, aluminum oxide, silicon dioxide, celite, clay, talc etc. It is also good.

The proportion of the extender pigment is preferably 16% by mass or more, particularly 18% by mass or more, and more preferably 25% by mass or less, particularly preferably 23% by mass or less, based on the total amount of solids forming the white layer.
Further, in order to improve the dispersibility of the white pigment, the extender pigment and the like in the coating solution which is the base of the white layer, a dispersing agent may be blended in the coating solution.

  As the dispersant, for example, Nobucosanto RFA (polycarboxylic acid ammonium salt) manufactured by Sannobu Co., Ltd., SN Disperse 5020 (polycarboxylic acid ammonium salt), SN Disperse 5468 (polycarboxylic acid ammonium salt), SN Disperse 9228 (Essotel-type nonionic surfactant), SN Wet 366 (nonionic surfactant), SN sparse 70 (nonionic surfactant), SN sparse 2190 (polycarboxylic acid amine salt), homoenol manufactured by Kao Corporation (Registered trademark) L-18 (special polycarboxylic acid type polymer surfactant), L-95 (alkyl imidazoline, nonionic surfactant), L-100 (silicone surfactant), L-1820 ( 1) or 2 or more types such as special polycarboxylic acid type polymer surfactants) Ru.

The blending ratio of the dispersant is preferably 4% by mass or more, and more preferably 7% by mass or less in the total amount of the solid content forming the white layer.
Writing layer
The writing layer is disposed on or immediately below the outermost layer of the correction layer and has an absorbability for the ink to be written on the correction layer, and the written ink penetrates into the inside of the correction layer to lower the writing density. Is a layer to prevent

The writing layer is constituted by incorporating a porous material such as silica having ink absorbability into two kinds of binder resins of the same rubbery resin and glassy resin as the white layer.
By using the same binder resin as that of the white layer in the same composition, it is possible to well balance the flexibility of the writing layer, the followability to the base material, and the film cutting property.
When a polyester resin having an acid value of 5 mg KOH / g or less, particularly 3 mg KOH / g or less is selectively used as the glassy resin among the binder resins, the ink written on the writing layer penetrates into the inside and The writing density can be more favorably suppressed from decreasing.

  This effect can be more remarkably exhibited when such a polyester resin and a porous body such as the above-mentioned silica are used in combination. That is, while the ink drawn on the correction layer is prevented from permeating the inside of the correction layer by the above polyester resin having a small ink absorbability, the ink is absorbed by the porous body and the outermost layer or immediately below it. Of the writing layer to prevent the writing density from decreasing.

The writing layer may be a transparent layer without containing a coloring agent, but as described above, 99% by mass or more of the total amount contains a coloring agent which is a white pigment, and its thickness is 8 μm or less and doubles as a white layer. You can also
<Porous material for writing layer>
As a porous body to be contained in the writing layer, silica is preferable.

As the silica, any of dry method silica (combustion method silica, arc method silica, etc.) and wet method silica (precipitation method silica, gel method silica, etc.) classified according to the production method thereof can be used.
Examples of such silica include one or more of GASIL (registered trademark) HP260, HP270, HP280, HP290, 23F, HP39, 200DF, GM2 and the like manufactured by PQ Corporation.

The blending ratio of silica is preferably 4% by mass or more, particularly preferably 6% by mass or more, and more preferably 12% by mass or less, particularly preferably 10% by mass or less in the total amount of solid components forming the writing layer.
If the blending ratio of silica is less than this range, the effect of improving the ink absorbability of the writing layer may not be sufficiently obtained.
On the other hand, when the compounding ratio of silica exceeds the above range, the binding force of the binder resin is lowered to make the writing layer easy to disintegrate, and the film strength is lowered. When writing on the correction layer, etc., the correction layer including the writing layer may be easily broken.

In addition, a large amount of silica may be easily crushed, for example, by writing pressure when writing on the correction layer, and when it is crushed, writing may be difficult.
When the writing layer is a white layer, the blending ratio of the white pigment and the binder resin is usually in order to well balance the flexibility, the followability to the base material, and the film cutting property and to secure the good hiding property. For example, the blending ratio of the extender pigment may be reduced and the amount of silica may be blended.

Although the thickness of the writing layer can be set arbitrarily, it is considered white in consideration of improving productivity of pressure-sensitive correction tape production by preventing the process of drying the coating solution that is the basis of the writing layer from becoming the rate-limiting step. As with the layers, it is preferred to be 8 μm or less. Also, in order to form a continuous writing layer having a constant thickness without causing blurring or the like in the step of forming a writing layer by coating of a coating solution and drying, the thickness is preferably 1 μm or more, particularly 3 μm or more .

Slip layer
The sliding layer is a layer which has sliding properties with respect to the pen point, is disposed on the outermost layer of the correction layer, and is particularly for improving the writing property by a ballpoint pen or the like.
The sliding layer is made of the same binder resin as the white layer and is made of a sliding material such as flake-like silica, flake-like mica, or a pearl pigment, which has sliding properties for the pen tip and which has a smaller particle size than that used for the writing layer. It consists of.

By using the same binder resin as that of the white layer in the same composition, it is possible to well balance the flexibility of the sliding layer, the followability to the base material, and the film cutting property.
The sliding layer may be a transparent layer without containing a coloring agent, but as described above, 99% by mass or more of the total amount contains a coloring agent which is a white pigment and the thickness thereof is 8 μm or less and also serves as a white layer. You can also

<Sliding material for sliding layer>
Examples of the sliding material to be contained in the sliding layer include silica having a particle diameter smaller than that to be contained in the writing layer as described above, or one or two or more kinds of scaly mica, pearl pigment and the like.
In the case of silica, for example, the content of the sliding material is preferably 4% by mass or more, particularly 6% by mass or more, and 12% by mass or less, particularly 10% by mass or less, based on the total amount of solids forming the sliding layer. Preferably there.

If the blending ratio of silica is less than this range, the slip properties of the sliding layer may not be sufficiently improved.
On the other hand, when the compounding ratio of silica exceeds the above range, the binding force of the binder resin is reduced, the disintegrability of the sliding layer becomes strong, and the film strength is reduced. When writing on the correction layer, etc., the correction layer including the sliding layer may be easily broken.

In addition, a large amount of silica may be easily crushed, for example, by writing pressure when writing on the correction layer, and when it is crushed, writing may be difficult.
When the sliding layer is a white layer, the proportion of the white pigment and the binder resin is usually in order to ensure a good balance between the flexibility and the following property to the base material and the film cutting property and to ensure a good hiding property. For example, the blending ratio of the extender pigment may be reduced and the amount of silica may be blended.

Although the thickness of the sliding layer can be set arbitrarily, it is considered white in consideration of improving productivity of pressure-sensitive correction tape production by preventing the process of drying the coating solution that is the basis of the sliding layer from becoming the rate-determining step. As with the layers and the like , the thickness is preferably 8 μm or less. Also, in order to form a continuous sliding layer having a constant thickness without causing blurring or the like in the step of forming a sliding layer by coating of a coating solution and drying, the thickness is preferably 1 μm or more, particularly 3 μm or more. .

Adjustment layer
The adjustment layer is a layer for further improving the flexibility of the correction layer and the followability to the base material, or conversely, improving the film cutting property of the correction layer, and as the former adjustment layer, The layer which made the softness | flexibility and the tracking property with respect to a base material improved rather than the layer of, and the layer which made the film cutability improved as another layer as an adjustment layer of the latter is mentioned.

Among them, in order to form the adjustment layer with improved flexibility and followability to the base material, for example, a plasticizer may be compounded, or the compounding ratio of the rubbery resin may be more than the range described above, or conversely The proportion of the glassy resin may be reduced, or a resin having higher rubber elasticity may be selected and used as the rubbery resin.
Specifically, the blend ratio of the elastomer such as the SEBS block copolymer is set to be more than the range described above, or the blend ratio of the polyester resin is set to be smaller than the range described above, or as a rubber-like resin For example, another rubbery resin having higher rubber elasticity than the SEBS block copolymer, such as butadiene rubber, may be used alone or in combination with an elastomer such as the SEBS block copolymer.

When an elastomer such as an SEBS block copolymer is used in combination with a rubber-like resin having higher rubber elasticity than that of the SEBS block copolymer, the proportion of the rubber-like resin is increased to increase the proportion of the adjustment layer and to the flexibility and base material of the correction layer. The followability can be enhanced.
On the other hand, in order to form the latter adjustment layer having improved film breakage, for example, no plasticizer is added, or the mixing ratio of the rubbery resin is smaller than the range described above, and conversely, the mixing of the glassy resin Increasing the proportion, selecting and using a resin with weak rubber elasticity as the rubbery resin, or using together with the polyester resin an alicyclic hydrocarbon resin having the function of making the adjusting layer brittle. do it.

In the case of using a polyester resin and an alicyclic hydrocarbon resin in combination, as the ratio of the alicyclic hydrocarbon resin is increased, it is possible to enhance the film-breakability of the adjustment layer and the correction layer.
The adjustment layer may be a transparent layer without containing a colorant, or may be a colored layer described later, and as described above, at least 99% by mass of the total amount contains a white pigment as a white pigment. The thickness may be 8 μm or less to double as the white layer.

<Plasticizer>
As plasticizers that may be added to enhance the flexibility of the adjustment layer and the followability to the substrate, various plasticizers that can improve the plasticity of the binder resin to be combined and can exhibit the above function can be used. .
Such plasticizers include, for example, orthoamide (o-toluenesulfonamide) manufactured by Fuji Amide Chemical Co., Ltd., Topsizer (registered trademark) No. 1 S (p-toluenesulfonamide), Topsizer No. 3 (N-ethyl- o / p-toluenesulfonamide), Topsizer 5 (o / p-toluenesulfonamide), Topsizer 7 (N-n-butylbenzenesulfonamide), Topsizer 8 (N-cyclohexyl-p-toluene) (Sulfonamide), Sanso Cizer (registered trademark) DOP (di 2-ethylhexyl phthalate) manufactured by Shin Nippon Rika Co., Ltd., DINP (diisononyl phthalate), DIDP (diisodecyl phthalate), DU (diundecyl phthalate), etc. 1 type or 2 types or more are mentioned.

The blending ratio of the plasticizer is preferably 1% by mass or more, and preferably 5% by mass or less in the total amount of the solid content forming the adjustment layer.
The flexibility of the adjustment layer and the followability to the base material can be enhanced as the blending ratio of the plasticizer is increased.
Although the thickness of the adjustment layer can be set arbitrarily, it is considered white in consideration of improving the productivity of pressure-sensitive correction tape production by preventing the drying step of the coating solution which is the basis of the adjustment layer from becoming the rate-limiting step. As with the layers and the like , the thickness is preferably 8 μm or less. The thickness is preferably 1 μm or more, particularly 3 μm or more, in order to form a continuous adjustment layer having a constant thickness without causing blurring or the like in the step of forming the adjustment layer by coating of a coating solution and drying. .

Barrier layer
As the barrier layer, various layers having anti-bleeding properties may be used which keep the ink which has been written or printed on the paper in the same manner as in the prior art in the layer to prevent further bleeding. By providing such a barrier layer, the ink bleeds from the writing or printing on the paper to the correction layer and becomes visible through the correction layer over time, that is, the concealability of the correction layer decreases over time. It can prevent.

Like the writing layer, the barrier layer can be configured by containing a porous material having ink absorbency in the same binder resin as the white layer.
By using the same binder resin as that of the white layer in the same composition, it is possible to well balance the flexibility of the barrier layer, the followability to the base material, and the film cutting property.
As the porous body, the same silica as used in the writing layer is suitably used.

The blending ratio of silica is preferably 4% by mass or more, particularly preferably 6% by mass or more, and more preferably 12% by mass or less, particularly preferably 10% by mass or less, based on the total amount of solids forming the barrier layer.
If the blending ratio of silica is less than this range, the effect of improving the ink absorbability of the barrier layer may not be sufficiently obtained.
On the other hand, when the compounding ratio of silica exceeds the above range, the binding force of the binder resin is lowered to make the barrier layer easily disintegratable, and the film strength is lowered. When writing on the correction layer, etc., the correction layer including the barrier layer may be easily broken.

In addition, a large amount of silica may be easily crushed, for example, by writing pressure when writing on the correction layer, and when it is crushed, writing may be difficult.
When the polyester resin having an acid value of 5 mg KOH / g or less, particularly 3 mg KOH / g or less is selectively used as the glassy resin among the binder resins, the bleeding resistance of the barrier layer can be further improved.

The barrier layer may be a transparent layer without a colorant, or may be a colored layer to be described later, and as described above, at least 99% by mass of the total amount is a white pigment with a colorant. The thickness may be 8 μm or less to double as the white layer.
When the barrier layer is a white layer, the blending ratio of the white pigment and the binder resin is usually in order to well balance the flexibility, the following property to the base material, and the film cutting property and to secure the good hiding property. For example, the blending ratio of the extender pigment may be reduced and the amount of silica may be blended.

Although the thickness of the barrier layer can be set arbitrarily, it is considered white in consideration of improving productivity of pressure-sensitive correction tape production by preventing the process of drying the coating solution that is the basis of the barrier layer from becoming the rate-determining step. As with the layers and the like , the thickness is preferably 8 μm or less. Further, in order to form a continuous barrier layer having a constant thickness without causing blurring or the like in the step of forming a barrier layer by coating of a coating solution and drying, the thickness is preferably 1 μm or more, particularly 3 μm or more .

着色 Colored layer》
As a colored layer which comprises a correction layer with a white layer etc., the various layers colored according to the color tone of writing as an object of concealment, and printing like before are mentioned. By laminating such a colored layer under the white layer, it is possible to compensate for the hiding ability of the white layer and make it difficult to see writing or printing on the paper.

The colored layer is preferably formed by replacing a part of the same composition as the white layer with a colorant other than the white pigment. For example, in the case of black to gray, black pigments such as carbon black may be used.
By using the same binder resin as that of the white layer in the same composition, it is possible to well balance the flexibility of the colored layer, the followability to the base material, and the film cutting property. In addition, the colored layer can also be provided with good hiding power by the white pigment.

As carbon black, various carbon blacks exhibiting black color can be used.
Add a colorant other than the white pigment, such as black pigment such as carbon black, more than in the case of the white layer, that is, the other colorant such that the proportion of the white pigment is less than 99 % by mass of the total colorant By blending, it is possible to color the colored layer to any color according to the color of writing or printing as a concealing target.

The specific range of the mixing ratio of the other coloring agents is, as described above, in consideration of coloring the coloring layer to an arbitrary color according to the color of writing or printing as a concealing target, etc. The content is preferably 1% by mass or more, and more preferably 5% by mass or less in the total amount of solids forming the layer.
In addition, in order to well balance the flexibility of the colored layer, the followability to the base material, and the film cutting property, and to ensure the good concealability, the blending ratio of the white pigment and the binder resin is the same as that of the white layer, For example, the proportion of the extender pigment may be reduced and other colorants may be added accordingly.

Although the thickness of the colored layer can be set arbitrarily, it is considered white in consideration of improving productivity of pressure-sensitive correction tape production by preventing the process of drying the coating solution that is the basis of the colored layer from becoming the rate-determining step. As with the layers and the like , the thickness is preferably 8 μm or less. Also, in order to form a continuous colored layer having a constant thickness without causing blurring or the like in the step of forming a colored layer by coating of a coating solution and drying, the thickness is preferably 1 μm or more, particularly 3 μm or more .

<< Printing layer >>
Examples of the print layer include print layers having various fine patterns for preventing reading of the writing and the printing, which are colored according to the color of the writing and the printing as the concealing target.
This printing layer is printed, for example, by gravure printing or the like using an arbitrary ink on the surface of the layer formed immediately before, for example, while sequentially laminating the white layer etc. on one side of the substrate as described later. It is formed.

The thickness of the printing layer can be appropriately set according to the type of ink used and the printing method to be employed.
<< Stacking Order of Each Layer >>
The arrangement order of the layers constituting the correction layer can be appropriately set in accordance with the function of each layer.
For example, the sliding layer is disposed on the outermost layer of the correction layer, which is in direct contact with the pen tip, in order to improve the sliding property of the ball pen or the like to the pen tip.

The writing layer is preferably disposed on the outermost layer of the correction layer or immediately under the correction layer in order to prevent the ink written on the correction layer from penetrating into the inside and lowering the writing density.
The colored layer and the printing layer are disposed further below a white layer having a thickness of 8 μm or less from the surface in order to sufficiently conceal the color of these layers and maintain the whiteness of the surface of the correction layer. It is preferable to set.

The barrier layer is preferably disposed on the lowermost layer of the correction layer or immediately above it in order to prevent the ink written or printed on the paper surface from bleeding into the correction layer as much as possible.
Other white layers can be disposed at any position between the above layers.
«Base material»
As a base material, various base materials, such as a plastic film, paper, and metal foil, can be used, for example.

Among them, as the plastic film, for example, polyester resin such as polyethylene terephthalate (PET), polyethylene naphthalate etc., polycarbonate resin, polyolefin resin such as polypropylene, polyacrylic resin, polystyrene resin etc. and having a thickness of about 3 μm to 50 μm or less A film is mentioned.
Examples of the paper include thin paper such as glassine paper having a basis weight of about 30 g / m ² or more and 60 g / m ² or less.

Furthermore, as metal foil, foils, such as aluminum, zinc, brass, copper etc., are mentioned, for example. Also, laminated films of metal foil and plastic film can be used.
In order to enhance the releasability of the correction layer at the time of transfer onto the paper surface, the surface of the base on which the correction layer and the adhesive layer are laminated in this order needs to be subjected to release treatment.
In addition, the adhesive layer adheres to the surface of the substrate opposite to the side on which the correction layer and the adhesive layer are laminated, with the pressure-sensitive correction tape wound in a roll as described above. In order to prevent the correction layer from being released when the pressure-sensitive correction tape is fed from the roll, the opposite surface also needs to be released.

As the release treatment, the surface of the substrate may be coated with a release layer containing a resin having releasability such as silicone resin, fluorine resin, polyolefin resin, or the like, or containing such a resin. Note that both sides of the substrate may be coated with the same release layer, or may be coated with different release layers as necessary.
The thickness of the release layer is preferably 0.05 μm or more, more preferably 0.08 μm or more, particularly preferably 0.1 μm or more, 3 μm or less, preferably 1.5 μm or less, particularly preferably 1 μm or less. The thickness of the release layer may be the same or different on both sides of the substrate.

In addition, the entire substrate may be formed of a releasable resin and the release layer may be omitted. The "release-treated substrate" as referred to in the present invention also includes a substrate composed of such a releasable resin.
«Adhesive layer»
Examples of the pressure-sensitive adhesive layer include any pressure-sensitive adhesive layer containing various known pressure-sensitive adhesives as a main component.

As this adhesive, 1 type, or 2 or more types of adhesives, such as an acrylic type, rosin type, rubber type, vinyl ether type, polyisobutylene type, are mentioned, for example.
The pressure-sensitive adhesive layer can be formed by applying a coating solution containing various additives such as an adhesion regulator and organic or inorganic fine particles, etc., to the above-mentioned pressure-sensitive adhesive, if necessary, and drying it.
As the coating solution for the adhesive layer, an aqueous solution or aqueous dispersion in which the above-described components are dissolved or dispersed in an aqueous solvent mainly composed of water is used in order not to affect the correction layer which is the base. Is preferred.

The thickness of the adhesive layer is preferably 0.5 μm or more, particularly preferably 1 μm or more, and more preferably 5 μm or less, particularly preferably 4 μm or less.
In addition, 99 % by mass or more of the total amount of a coloring agent or white dye which is a white pigment is blended in the adhesive layer to have the function of the white layer, or a pigment or dye matched to the color of writing or printing as a concealment target Can also be blended to have the function of a colored layer.

«Production of pressure sensitive correction tape»
The pressure-sensitive correction tape of the present invention comprises the steps of applying and drying the above-mentioned layers constituting the correction layer on one surface of a substrate sequentially from the layer on the surface side of the correction layer. After laminating to form a correction layer by repeating the above, it can be manufactured by laminating an adhesive layer at the end.

As a coating method of the coating solution, any of various conventionally known coating methods can be adopted.
In particular, among the layers constituting the correction layer, a layer having a thickness of 5 μm or less (film thickness after drying, the same applies hereinafter) can be formed by a gravure coating method.
According to the gravure coating method, pattern formation of each layer is easy, and since fine control of the thickness is possible in the above-mentioned range, it is possible to form a film with high accuracy and to perform high-speed printing.

Therefore, for example, when all the layers constituting the correction layer have a thickness of 5 μm or less, by applying the gravure coating method to the formation of all layers, a pressure-sensitive correction tape having a high-precision correction layer can be produced with good productivity. It can be manufactured.
The layer having a thickness of more than 5 μm can be formed, for example, by a conventional coating method using a bar coater, a comma coater or the like. The adhesive layer can also be formed by these methods.

Therefore, for example, in the case of forming a correction layer in which a layer having a thickness of 5 μm or less and a layer having a thickness exceeding 5 μm are mixed, the gravure printing method and the ordinary coating method are mixed and used properly according to the thickness of each layer. A correction layer can be formed.
However, since these ordinary coating methods can also be applied to the formation of a layer having a thickness of 5 μm or less, it is applied when all the layers have a thickness of 5 μm or less, or when 5 μm or less and a layer exceeding 5 μm are mixed. All layers can also be formed by conventional coating methods.

The continuous coating apparatus described above is used to form a specific correction layer. That is, as a coater corresponding to each layer of the continuous coating apparatus, the above-mentioned gravure coater etc. is set according to the thickness of each layer, etc., and the substrate is fed at a constant feed rate, The correction layer is formed by sequentially passing the coater for the coating solution and the dryer.
The pressure-sensitive adhesive layer may be formed continuously in the above-mentioned continuous coating apparatus following the formation of the correction layer, or the substrate on which the correction layer is formed is once wound and pooled in a roll, Depending on the demand for the correction tape, the pressure-sensitive correction tape may be manufactured by appropriately feeding it from a roll to form an adhesive layer.

Preparation of coating solution for white layer
The following components were mixed to prepare a standard white layer coating solution.

Each component in Table 1 is as follows.
White pigment: Thai Pure R-931 manufactured by DuPont Co., Ltd., rutile type titanium oxide Body pigment: Calcium carbonate Rubber-like resin: Tuftec H1272 manufactured by Asahi Kasei Chemicals Corporation, SEBS, S / EB ratio: 35/65, oil exhibition , Oil content: 36% by mass
Glassy resin: Elyter UE 3201 manufactured by Unitika Co., Ltd., polyester resin, tensile elongation at break: 4%, acid value: 2 mg KOH / g
Dispersing agent: SN spars 2190 manufactured by Sannobu Co., Ltd., polycarboxylic acid amine salt Solvent: toluene Also, the numerical values in the column of "% by mass" in Table 1 are each of the total solid content excluding toluene as a solvent. Indicates the blending ratio of the components (same below).

Preparation of coating solution for writing layer that doubles as white layer
The following components were mixed to prepare a coating solution for a writing layer which doubles as a white layer.

As the porous body in Table 2, silica [GASIL 200DF manufactured by PQ Corporation] was used. The other components were the same as the coating solution for the white layer.
Preparation of Coating Solution for Adjustment Layer Combined with White Layer
The following components were mixed to prepare a coating solution for an adjustment layer which doubles as a white layer.

As the plasticizer in Table 3, Topsizer 3 manufactured by Fuji Amide Chemical Co., Ltd., N-ethyl-o / p-toluenesulfonamide was used. The other components were the same as the coating solution for the white layer.
Preparation of Coating Solution for Colored Layer
The following components were mixed to prepare a coating solution for a colored layer.

As black pigments in Table 4, carbon black was used. The other components were the same as the coating solution for the white layer.
Example 1
As a substrate, a release agent containing different silicone resins was applied to both sides of a PET film with a thickness of 12 μm and dried to form a release layer with a thickness of 0.3 μm.

  In order to form the correction layer, a continuous coating apparatus is used to form a correction layer in which three standard white layers are laminated on one side of the above-mentioned substrate, and a coater for a coating solution to be the basis of each layer While setting a bar coater and a dryer at three points of the apparatus, the coating solution for the standard white layer prepared above was supplied to each coater. The coating thickness of each coater was set so that the thickness of the white layer after drying was 7 μm.

And while passing the above-mentioned substrate at a constant speed, by passing each coater and the drier immediately after that in order, three layers of standard white layers of 7 μm in thickness are laminated, with a total thickness of 21 μm. A correction layer was formed.
Next, a coating solution for an adhesive layer containing an acrylic adhesive is applied onto the correction layer formed, dried to form a 2 μm thick adhesive layer, and then the substrate is slit to a width of 6 mm to make a pressure-sensitive correction tape Manufactured.

Example 2
The outermost layer of the correction layer of the three-layer structure is a writing layer which also serves as a white layer, and the coating solution for the writing layer previously prepared in the coater which is first applied to one side of the substrate of the continuous coating apparatus A correction layer having a total thickness of 21 μm is formed in the same manner as in Example 1 except that one writing layer having a thickness of 7 μm and two white layers having a thickness of 7 μm are sequentially stacked from the surface side except that supplied. , Manufactured pressure sensitive correction tape.

Example 3
The outermost layer of the correction layer of the three-layer structure is used as an adjustment layer which also serves as a white layer, and a colored layer is formed instead of the white layer of the lowermost layer. The surface was prepared in the same manner as in Example 1 except that the coating solution for the adjustment layer prepared earlier was supplied to the coater to be applied, and the coating solution for the colored layer prepared previously was supplied to the coater applied last. A pressure-sensitive correction tape was manufactured by forming a correction layer having a total thickness of 21 μm, in which a 7 μm-thick adjustment layer, a 7 μm-thick white layer, and a 7 μm-thick colored layer were sequentially laminated from the side.

Example 4
Using a continuous coating apparatus, it is decided to form a correction layer of a five-layer structure of writing layer-white layer-adjustment layer-white layer-colored layer sequentially from the outermost layer, for the coating liquid which becomes the basis of each layer As a coater, a gravure coater and a dryer were set at five points of the apparatus, and the coating solution for each layer prepared above was supplied to each coater. The coating thickness of each coater was set such that the thickness of each layer after drying was 4.2 μm.

Then, while feeding the substrate at a constant speed, a correction layer with a total thickness of 21 μm is formed by sequentially passing each coater and the dryer immediately after that, thereby laminating the above-mentioned layers each having a thickness of 4.2 μm. A pressure-sensitive correction tape was produced in the same manner as in Example 1.
Example 5
Using a continuous coating device, a standard white layer will form a correction layer in which five layers are laminated, and the gravure coater and drying at five parts of the device as a coater for the coating liquid that is the basis of each white layer The machine was set and each coater was supplied with the standard white layer coating solution prepared above. The coating thickness of each coater was set so that the thickness of each white layer after drying was 4.2 μm.

Then, while feeding the substrate at a constant speed, a standard white layer having a thickness of 4.2 μm is laminated by sequentially passing each coater and a dryer immediately after that, and a correction of a five-layer structure having a total thickness of 21 μm The layers were formed and a pressure sensitive correction tape was produced as in Example 1.
Comparative Example 1
Using a continuous coating device, a standard white layer decides to form a correction layer with only one layer, and as a coater for a coating liquid that will also be a single layer of white layer a bar coater and drying in one position of the device The machine was set, and the coating solution for the standard white layer prepared above was supplied to the coater. The coater set the coating thickness so that the thickness of the white layer after drying was 21 μm.

Then, while the substrate is fed at a constant speed, a correction layer having a thickness of 21 μm consisting of only one standard white layer having a thickness of 21 μm is formed by passing the coater and a dryer immediately after that. A pressure sensitive correction tape was produced in the same manner.
Comparative Example 2
A continuous coating device is used to form a correction layer having a two-layer structure in which one standard white layer and one colored layer are laminated, and the device as a coater for a coating solution to be the basis of both layers. The bar coater and the dryer were set at two points, and the coating solutions for both layers prepared above were supplied to the respective coaters. Both coaters set application | coating thickness so that the thickness of each layer after drying might be 10.5 micrometers.

Then, while the substrate is fed at a constant speed, a two-layer structure having a total thickness of 21 μm in which a white layer and a colored layer having a thickness of 10.5 μm are laminated by sequentially passing both coaters and a dryer immediately after that A correction layer was formed, and in the same manner as Example 1, a pressure-sensitive correction tape was manufactured.
Comparative Example 3
In the same manner as in Comparative Example 2 except that the setting values of the coating thickness of both coaters were changed so that the thickness after drying was 14 μm for the standard white layer and 7 μm for the colored layer, each had the above thickness A correction layer having a two-layer structure with a total thickness of 21 μm in which a white layer and a colored layer were laminated was formed, and a pressure-sensitive correction tape was manufactured in the same manner as in Example 1.

<Whiteness evaluation>
The correction layer of the pressure-sensitive correction tape manufactured in the examples and comparative examples is transferred onto a base, and the surface is subjected to color measurement to determine the L ^* value of the L ^* a ^* b ^* color space, and white according to the following criteria The degree was evaluated.
○: 93% or more. Whiteness is good.
Fair: 90% or more and less than 93%. Whiteness Normal level.

X: less than 90%. Poor whiteness.
<Hiding evaluation>
The concealing rate of the correction layer of the pressure-sensitive correction tape manufactured in the examples and comparative examples was measured according to Japanese Industrial Standard JIS K5600-4-1: 1999 "General test method for paint-Part 4: Visual characteristics of coating film-Section 1 Measurement was conducted according to the test method described in "Hidden power (for light color paint)", and the concealability was evaluated according to the following criteria.

○: 95% or more. Good hiding ability.
Δ: 90% or more and less than 95%. Concealment Normal level.
X: less than 90%. Poor concealment.
<Productivity evaluation>
In forming the correction layer in the example and the comparative example, the feed rate of the continuous coating apparatus is changed variously and tested, and any layer causes drying failure only by passing the drier immediately after the coater. The maximum value of the feed speed which was not found was determined, and the productivity was evaluated based on the following criteria.

○: 70 mm / min or more. Good productivity.
Fair: 50 mm / min or more and less than 70 mm / min. Productivity normal level.
X: 35 mm / min or more and less than 50 mm / min. Poor productivity.
Xx: less than 35 mm / min. Productivity extremely poor.
The above results are shown in Table 5.

From the results of Comparative Example 1 in Table 5, when only one large white layer having a thickness exceeding 8 μm is formed as the correction layer, it takes a long time to dry the coating solution that is the basis of the white layer. Therefore, it has been found that it is necessary to set the feed rate of the substrate to a very low level, and the productivity is greatly reduced.
Moreover, although the concealability is improved when the white layer of half the thickness of Comparative Example 1 and the colored layer of the same thickness are combined one by one from the results of Comparative Example 2, the thickness of both layers is still 8 μm. It has been found that the feed rate of the substrate remains low, and the productivity is not improved so much.

Furthermore, from the results of Comparative Example 3, when the thickness of the white layer is increased in the laminated structure of Comparative Example 2, not only the concealability but also the whiteness is improved, but the white layer with the increased thickness becomes the rate-determining step. It turned out that the productivity was not improved at all.
On the other hand, according to the results of Examples 1 to 5, by setting a multilayer structure including two or more white layers having a thickness of 8 μm or less, the thickness of each layer including the white layers is set to 8 μm or less in every layer. It has been found that the time required for drying the coating solution can be shortened, productivity can be improved, and good whiteness and concealability can be secured by laminating two or more white layers as described above.

  Moreover, it turned out that the feed speed of a base material can be raised and productivity can be improved from the result of Examples 1-5, as the number of layers is increased and the thickness of each layer is decreased.

Claims (5)

A correction layer having a laminated structure of two or more layers and an adhesive layer are laminated in this order on one side of the substrate subjected to mold release treatment, and the correction layer contains a colorant and 99% by mass of the total amount of the colorant A pressure-sensitive correction tape comprising at least two white layers each having a thickness of 8 μm or less, which is a white pigment as described above. The correction layer is
A writing layer disposed on the surface side of the correction layer and having absorbency to ink to be written on the correction layer,
A sliding layer disposed on the surface side of the correction layer and having a sliding property with respect to the pen point,
-Adjustment layer for adjusting the flexibility of the correction layer, the followability to the substrate, or the film cutting property, and-the barrier layer having bleed resistance to the ink written or printed on the paper,
The pressure sensitive correction tape according to claim 1, comprising at least one layer selected from the group consisting of   At least one layer of the writing layer, the sliding layer, the adjustment layer, and the barrier layer contains a colorant in which 99% by mass or more of the total amount is a white pigment, and at least one of the at least two white layers The pressure-sensitive correction tape according to claim 2, which doubles as a layer. The correction layer may further include: a colored layer colored according to the color of writing or printing to be corrected, and a printed layer on which a pattern for preventing reading of the writing or print is printed,
The pressure-sensitive correction tape according to any one of claims 1 to 3, comprising at least one layer selected from the group consisting of   The pressure-sensitive correction tape according to any one of claims 1 to 4, wherein the adhesive layer contains a colorant, and at least 99% by mass of the total amount of the colorant is a white pigment.