JPH058594A - Transfer tape for correction and concealment - Google Patents

Abstract

PURPOSE:To obtain a transfer tape for correction and concealment excellent in all cutting properties, transfer properties, resistance to crazing and writing properties. CONSTITUTION:In a transfer tape 10 for correction and concealment, in which a pressure-sensitive transfer layer 11 for correction and concealment containing a color pigment is formed on one surface of a filmy base material 12, the pressure-sensitive transfer layer 11 for correction and concealment is composed of a conceal layer consisting of the color pigment and a vehicle and a pressure- sensitive adhesive layer formed on the surface of the conceal layer, the elongation percentage of the vehicle in the conceal layer is brought to 3.5X10<2>% or more, the conceal layer has porous structure having porosity of 30-50% and the breaking strength of the conceal layer is brought to 1.7X10<2>g/mm<2> or less.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a pressure-sensitive transfer layer for hiding correction, which is transferred to a paper surface by being pressed against a paper surface by a hand-held pressing tool, so that an image at that location is hidden and erased. In addition, the present invention relates to a hiding-correction transfer tape capable of writing an image on the surface of the transferred hiding-correction transfer layer using a writing instrument such as a ballpoint pen or a pencil.

[0002]

2. Description of the Related Art A hiding-correction transfer tape of this type has a structure in which a hiding-correction pressure-sensitive transfer layer containing a white pigment is provided on one surface of a film-shaped substrate. Hand-held transfer devices that are known and that are used with this transfer tape are also known.

In this type of hiding-correction transfer tape, when pressure is applied to the transfer layer, that part is easily cut from the other part, and the excess part is not transferred (hereinafter,
(Cutability), when the transfer layer is transferred to the desired location,
The transfer layer does not crack (hereinafter referred to as “crack resistance”), the transfer layer at a portion where pressure is applied is completely transferred (hereinafter referred to as “transferability”), a pencil on the transferred transfer layer, When writing with a writing instrument such as a ballpoint pen, the transfer layer should not rise due to writing pressure (below,
It is an important requirement to determine whether the transfer tape is good or bad in that all requirements such as writability) are well achieved. In particular, when the transfer tape is used in a hand-held type transfer tool, it is required to have a function superior to that of the conventional correction fluid, and thus all the above requirements are very important. However, no conventional transfer tape of this type satisfies the above four requirements at the same time.

For example, in terms of cuttability, a material that can withstand use has poor cracking resistance, and a material with good cracking resistance has poor writing properties. In addition, some waxes are mixed in the vehicle to improve the cutting property in order to exert pressure-sensitive transferability.
This product had the drawback of being inferior in crack resistance and writability.

In view of the above situation, the present invention is excellent in cuttability, resistance to cracking, transferability, and writability. Therefore, it is possible to satisfactorily correct hiding, and especially when used for a hand-held transfer tool. By the way, it is an object of the present invention to provide a hiding-correction transfer tape that exhibits an extremely good effect.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a hiding-correction transfer tape comprising a film-shaped substrate and a hiding-correction pressure-sensitive transfer layer containing a coloring pigment on one surface thereof. The transfer layer is composed of a hiding layer composed of a color pigment and a vehicle and a pressure-sensitive adhesive layer provided on the surface thereof, and the elongation rate of the vehicle in the hiding layer is 3.5 ×.
10 ² % or more, the hiding layer has a porous structure with a porosity of 30 to 50%, and its breaking strength is 1.7 × 10 ²
The present invention relates to a transfer tape for hiding correction, which is g / mm ² or less.

[0007]

OPERATION AND EXAMPLES The hiding-correction transfer tape of the present invention is a hiding-correction tape composed of a hiding layer having the above-mentioned specific structure and a pressure-sensitive adhesive layer provided on one surface of a film-like substrate. A pressure-sensitive transfer layer is provided.

The porosity of the concealing layer is expressed by the following equation.

Porosity = [(A-B / C) / A] × 100 Here, A, B, and C represent the following.

A: Hidden layer thickness (measured by Millitron thickness measuring machine, μm) B: Hidden layer solid coating amount (g / m ² ) C: Hidden layer solid content of 5 kg / cm ² Density (g / cm ³ ) obtained by compressing and molding by pressure using a density gradient tube method. The concealing layer in the present invention comprises a vehicle and a color pigment contained in the vehicle, and has a porosity of 30 ~
The breaking strength is 50%, the breaking strength is 1.7 × 10 ² g / mm ² or less, and the elongation of the vehicle is 3.5 × 10 ² % or more.

The pressure-sensitive transfer layer for hiding-correction is strongly adhered by the pressure-sensitive adhesive layer when the transfer tape for hiding-correction of the present invention is pressed against a paper surface, and the breaking strength of the hiding layer is 1.7 × 10. Since it is set to ² g / mm ² or less, it is possible to almost certainly cut at the boundary line between the place where pressure is applied and the place where pressure is not applied, and it has good cuttability.

On the other hand, since the vehicle having the above-mentioned large elongation is used as the vehicle for the hiding layer, the hiding layer is transferred flexibly corresponding to the transfer target, and as a result, it has excellent crack resistance. Good transferability without local non-transfer.

If the elongation rate of the vehicle of the hiding layer is simply increased, the transfer layer at the portion which should not be transferred beyond the boundary line is also attracted to the transferred portion and peeled off from the substrate. However, by using a porous structure with a porosity of 30 to 50% as described above, even if the elongation of the vehicle is 3.5 × 10 ² % or more, the concealment layer will be stuck to the transferred part. The phenomenon that even the non-transferred portion near the edge of the substrate peels off from the substrate is prevented. That is, by forming the hiding layer into a porous structure having the porosity, the hiding layer is provided with the breaking strength at which good cutting properties can be obtained while using a vehicle having a large elongation rate.

Further, the hiding layer has its porous structure destroyed by the pressure applied during transfer, and becomes a denser layer after transfer than before transfer. As a result, even when writing with a ball-point pen or pencil on the hiding layer after transfer, the adjacent portion does not rise, and excellent writing performance is exhibited.

Further, when the vehicle of the hiding layer is constituted by mixing a rubber-like resin and a glass-like resin having a small elongation, the hardness of the hiding layer after the transfer is increased, and a suitable hardness suitable for writing is obtained. It is possible to obtain a more excellent concealing layer due to the cuttability while having the thickness.

Further, in the vehicle in which the glass-like resin is mixed with the rubber-like resin, the dye of the ink permeates the hiding layer and the hiding power of the hiding layer even when the characters written by the ink containing the dye are corrected. It does not cause the problem of blocking. It is also possible to further improve the writing feel by adjusting the mixing ratio of the rubber-like resin and the glass-like resin.

Further, in consideration of the porosity of the hiding layer being 30 to 50%, the coating amount of the adhesive of the pressure sensitive adhesive layer after drying is preferably 1 to 5 g / m ² (more preferably 2 ~ 4 g /
m ² ) prevents the adhesive from bleeding through the voids after transfer to the surface of the hiding layer after transfer,
The surface of the hiding layer after transfer does not adhere to other objects.

The present invention will be specifically described below.

The vehicle used for the hiding layer in the present invention has an elongation (measured at room temperature by the test method of ASTM D-412, the same applies hereinafter) of 3.5 × 10 ² % or more. When the elongation is less than 3.5 × 10 ² %, the crack resistance is poor and local non-transfer is likely to occur, which is not preferable. The upper limit of the growth rate of the vehicle is usually 5.2 × 10 ² %.

As the above-mentioned vehicle, a resin satisfying the above-mentioned elongation rate can be used alone, but especially a combination of a rubber-like resin and a glass-like resin, particularly an elongation rate of 4.5 × 10 ² % or more. Rubbery resin and elongation of 50
% Or less, and a combination with a glassy resin is preferable.

The rubber-like resin that can be used is preferably one that is flexible even if it contains only a small amount of plasticizer, such as styrene-butadiene-styrene block copolymer (SDS), styrene-ethylene-butylene-styrene block copolymer. Polymer (SEBS), styrene-butadiene rubber, styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / propylene block copolymer (SEP), urethane rubber, fluororubber, acrylonitrile-butadiene rubber, ethylene- One or more of ordinary synthetic rubber or rubber-like resin such as vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, chlorosulfonated polyethylene and cyclized rubber can be used.

The glassy resin is preferably one having a small elongation, a melting point or softening point of 100 ° C. or higher, and a high hardness. Preferred glassy resins that can be used include, for example, saturated or unsaturated alicyclic hydrocarbon resins, styrene-acrylic copolymer resins,
One or more of ketone resins, vinyl chloride-vinyl acetate copolymer resins, polyolefin resins such as polyethylene and polypropylene, etc. may be mentioned.

The mixing ratio of the rubber-like resin and the glass-like resin in the preferable vehicle may vary depending on the elongation percentage of the rubber-like resin and the glass-like resin used, but the elongation percentage of the vehicle is Adjust so that it is 3.5 × 10 ² % or more. At this time, by using a rubber-like resin having an elongation rate of 4.5 × 10 ² % or more and a glass-like resin having an elongation rate of 50% or less in combination, the flexibility, the writing property, and the cutting property are improved. A vehicle having excellent properties can be obtained. Specifically, 2 to 30 parts of glass-like resin, preferably 5 to 10 parts of rubber-like resin (weight part, the same applies hereinafter)
It is 15 copies. The vehicle obtained in such a blending ratio has an appropriate elasticity and forms a hiding layer excellent in writability on the hiding layer after transfer. If the content of the glassy resin exceeds the above range, or if only the glassy resin is used, the hiding layer loses its flexibility and cracks easily occur during transfer. When the content of the glassy resin is less than the above range, the writability is deteriorated and the cuttability of the hiding layer is deteriorated. If the vehicle is made of only a rubber-like resin, the cuttability is further reduced.

In order to give the above-mentioned concealing layer the above-mentioned porosity, a porosity adjusting agent is usually mixed. Examples of the porosity adjusting agent include magnesium carbonate, calcium carbonate, barium carbonate, barium sulfate, aluminum oxide,
Examples include silicon dioxide, celite, clay, and talc. The particle size of the porosity adjusting agent is preferably in the range of 1 to 20 μm. If the particle size is too small, the cuttability decreases, and if it is too large, the writability deteriorates.

The porosity adjusting agent is mixed in a ratio of 5 to 40 parts, preferably 8 to 18 parts, per 10 parts of the vehicle. If the amount of the porosity controlling agent is too large, a choking phenomenon occurs, and if the porosity controlling agent is insufficient or is not used at all, the cuttability of the hiding layer is lowered.

The voids in the hiding layer can be adjusted by selecting the kind and amount of the porous conditioner. If the porosity is less than 30%, the cuttability will decrease, and if it exceeds 50%, the writability and crack resistance will deteriorate.

Breaking strength of the hiding layer (Autograph AG
-100A (tensile tester manufactured by Shimadzu Corp.) at room temperature, the same applies below) is 1.7 × 10 ² g / mm ² or less.
If the breaking strength is higher than the above range, the cuttability is lowered.
The lower limit of breaking strength is usually 0.4 × 10 ² g / mm ² .

Since the object of the correction process is generally white paper, the hiding layer is usually colored white. However, if the object is paper that is colored in a color other than white, the hiding layer is colored to be almost the same as the ground color of the object, so that the modified part is indistinguishable from the ground part. To do.

As the white pigment, titanium oxide powder is mainly used because of its excellent hiding power. The white pigment preferably has a particle size of about 0.1 to 1.0 μm from the viewpoint of hiding property.

In addition to the white pigment, a color adjusting agent for adjusting the color may be mixed. Examples include aluminum powder, copper powder, brass powder, dyes and the like.

Coloring pigments other than the white pigment used in the present invention include inorganic pigments such as titanium yellow, iron oxide, ultramarine blue, cobalt blue, chrome oxide green, spinel green, yellow lead, chrome vermillion, cadmium yellow and cadmium red. , Azo lake type, Hansa type, benzimidazolone type, monoazo type, diazolide type, pyrazolone type, condensed azo type, phthalocyanine type, quinacridone type, perylene type, perinone type, dioxazine type, anthraquinone type, isoindolinone type, etc. Examples include organic pigments.

The amount of the color pigment used depends on the dispersibility in the vehicle, the hiding power, etc., but it is 5 per 10 parts of the vehicle.
-40 parts, preferably 10-20 parts. If the amount of the coloring pigment used is too large, a choking phenomenon occurs in which pigment powder is deposited on the surface of the hiding layer, and if the amount used is too small, the hiding power becomes insufficient.

When the hiding layer is colored in a color other than white, it is preferable to use the above color pigments other than the white pigment in combination with titanium oxide so as to supplement their relatively poor hiding power. In that case, it is preferable to use at least 5 parts of titanium oxide per 10 parts of the vehicle, especially at least 10 parts, and for other coloring pigments, the total amount of titanium oxide and titanium oxide is 5 to 40 parts per 10 parts of the vehicle. ,
It is preferably used so as to be 10 to 20 parts.

The thickness of the hiding layer after drying is about 20 to 40 μm.
m is suitable. When the thickness is less than 20 μm, the hiding power is insufficient, and when the thickness exceeds 40 μm, when the paper after correction is copied, the boundary between the corrected portion and the uncorrected portion becomes a shadow and is difficult to be copied.

The pressure-sensitive adhesive layer is provided on the hiding layer, and the adhesive used for the adhesive layer has a strong adhesive force to paper and to the film substrate. Any conventionally known adhesive can be used as long as it has low adhesive strength. For example, acrylic,
Examples include rosin-based materials. Specifically, DNC-1 (trade name, manufactured by Dainippon Ink and Machinery Co., Ltd.), AB-461 (trade name,
Showa High Polymer Co., Ltd., Nicazole TS662 (trade name, manufactured by Nippon Carbide Industry Co., Ltd.) and the like.

The amount of the adhesive applied is 1 to 5 g / m ² , preferably 2 to 4 g / m ² . When a large amount of adhesive exceeding this range is applied to the surface of the hiding layer, when the ribbon-shaped product is processed into a pancake, set-off occurs at the core (that is, the pressure-sensitive adhesive layer or the hiding layer is (Phenomenon of adhering to the back side of the base material) easily occurs. On the other hand, when applying an amount of adhesive smaller than this range, transfer failure,
Defects such as deterioration of rewriting ability occur.

As the film-shaped substrate, a plastic film or paper such as polyethylene terephthalate (PET), polyethylene or polypropylene can be used. A suitable thickness is about 10 to 50 μm. If necessary, a release agent may be applied to both surfaces of these base materials to prevent the adhesive layer from adhering to the back surface of the base material during storage, and to make the concealment layer easy from the base materials. Be able to peel off and transfer. As the release agent, for example, silicone,
Fluorine-based resin can be used. It is also possible to use a base material coated with a commercially available release agent, for example, 40 GW (trade name, manufactured by Honshu Paper Co., Ltd.) for paper base material and PET for plastic base material.
50RLW-01 (trade name, manufactured by Honshu Paper Co., Ltd.) and the like.

To correct using the transfer tape for hiding correction of the present invention, the tape is placed on the surface to be corrected so that the pressure-sensitive adhesive layer is in contact with the surface, and the transfer layer is transferred by pressing with an appropriate pressing tool. do it.

In order to make a correction with the hiding correction transfer tape of the present invention, a commercially available hand-held transfer tool can be preferably used. FIG. 1 is an explanatory view showing a hiding correction operation performed using such a hand-held transfer tool, and FIG. 2 is a sketch drawing showing the inside of the transfer tool.

In FIGS. 1 and 2, reference numeral 1 is a transfer tool main body (holder) in which a cassette containing a hiding correction transfer tape is accommodated. 3 is an unwind reel of the hiding correction transfer tape 10 and 4 is a take-up reel. The unwinding reel 3 and the take-up reel 4 on which the hiding correction transfer tape 10 is wound are housed in a cassette, and the cassette is mounted on the transfer tool body 1 (the cassette is shown in FIG. 2). Absent). Transfer tool body 1
The unwinding side gear 5 and the winding up side gear 7 are attached in mesh with each other, and the unwinding reel 3 and the winding up reel 4 respectively have a shaft 6 of the unwinding side gear 5 and a shaft 8 of the winding side gear 7. Mounted on. The concealment correction transfer tape 10 is wound around the winding reel 4 from the winding reel 3 via the pressing member 2 and the tension pin 9. The pressing member is usually wedge-shaped.

Next, a correction operation using the transfer tool will be described.

When the tip (edge portion) 2a of the pressing member 2 is brought into contact with the surface to be corrected via the transfer tape 10 and moved in the direction of the arrow while pressing, the transfer tape pressed against the surface to be corrected by the pressing member tip 2a. The adhesive layer 10 is adhered to the surface to be modified.
As the transfer tool body 1 is moved, the tape 10 is sequentially fed from the unwinding reel 3 and sequentially bonded. The gear 7 rotates following the rotation of the gear 5 that rotates with the rotation of the take-up reel 3, and the take-up reel 4 rotates. When the transfer tape 10 passes through the tip 2a of the pressing member 2, it is separated into a transfer layer 11 adhered to the surface to be corrected and a film base material 12, and only the film base material 12 is wound on a winding reel 4. To be When the transfer layer 11 has been transferred to the correction site of the surface to be corrected, the tip 2a of the pressing member is strongly pressed against the surface to be corrected and then the transfer tool body 1 is lifted. The transfer layer 11 is cut at the strongly pressed portion, and the correction operation is completed.

The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 3 A hiding layer having the formulation shown in Table 1 was formed on the substrate.

That is, a total amount of 100 parts of the materials shown in Table 1 and 163 parts of toluene were mixed with an attritor for 20 minutes to prepare a coating solution. This is coated with a gravure coater on one side of a 50 μm thick double-sided release PET film to a thickness of 28 μm after drying and dried to form a hiding layer having the physical properties shown in Table 2. Formed.

Next, an adhesive (DN
C-1) was applied after drying to an application amount of 3 g / m ² to form an adhesive layer, and a transfer tape for hiding correction was obtained.

While slitting this into a width of 5 mm, a length of 12 m was wound on a core to obtain a pancake-like sample having a diameter of 3.4 cm.

Comparative Examples 1 to 4 Using the materials having the formulations shown in Table 1, a concealing layer having the physical properties shown in Table 2 was formed on the substrate in the same manner as in Examples 1 to 3. Then, an adhesive layer was formed on the hiding layer in the same manner as in Examples 1 to 3 to obtain a hiding correction transfer tape, from which a pancake-like sample was obtained.

The pancake-shaped hiding correction transfer tapes obtained in Examples 1 to 3 and Comparative Examples 1 to 4 are shown in FIGS.
It was mounted on the transfer tool shown in (1), and the transfer layer was transferred under a load of about 600 g to a high-quality paper on which characters are printed with black ink.

As a result, the black characters were completely hidden by the transferred hiding layer.

Further, the following items were evaluated.

(1) It was evaluated whether or not the transfer layer was cut at the final pressing position by the tip of the pressing member of the cutting transfer tool.

That is, during 10 times of use, the pressure-sensitive transfer layer may or may not be cut at the final pressing point, or, when cut, depending on the number of times the transfer layer is transferred 1 mm or more beyond the final pressing point and transferred, It was evaluated according to the standard.

There was a case where the pressure-sensitive transfer layer was not cut = 0 point, protrusion of 1 mm or more occurred 3 times or more = 1 point occurred 2 times = 2 points occurred once or not at all =
3 points (2) Transferability In a 150 mm running test using a transfer tool, it was observed how many transfer defects occurred during 10 times of use, and evaluated according to the following criteria.

3 points or more = 0 points 2 points = 1 point 1 point occurred or no points occurred = 2 points (3) 150 mm by a crack-resistant transfer tool After transfer transfer, transfer layer surface The cracks were observed with a magnifying glass having a magnification of 10 and evaluated according to the following criteria.

3 points or more = 0 points 2 points = 1 point 1 point or no points = 2 points (4) Writable with a ballpoint pen on the concealment layer transferred on the fine paper. 1 to
Write the number 10 and observe the presence of excitement by writing,
The following criteria evaluated.

Occurrence of 3 or more spots = 0 points 2 spots of 1 spot = 1 spot 1 spot or no spots = 2 points The results of the above test are shown in Table 2. .

It can be seen from Table 2 that the hiding-correction transfer tape of the present invention is excellent in cuttability, transferability, crack resistance and writing ability.

[0059]

[Table 1]

[0060]

[Table 2]

Example 4 Using the formulation shown below, the porosity was 40% and the breaking strength was 1.0.
Example 1 except that a hiding layer of × 10 ² g / mm ² was formed.
In the same manner as in 3, a transfer cake for pancake-shaped hiding correction was obtained.

Component part Brilliant carmine 6B 20.0 Titanium oxide (particle size 0.1 to 1 μm) 27.0 Magnesium carbonate (particle size 1 to 10 μm) 22.0 Styrene-ethylene-butylene-styrene copolymer (elongation rate 750%) 14.0 Alicyclic Saturated hydrocarbon resin (elongation 0%) 14.0 Dispersant (homogenol L-18) 3.0 100.0 Note: Elongation of vehicle: 365% Using the obtained transfer tape, in the same manner as in Examples 1 to 3, light vermilion The characters printed with black ink on the high-quality paper of the above were hidden and corrected.

As a result, the black characters were completely hidden by the transferred hiding layer. Also, the correction part was almost indistinguishable from the background color of the paper. Furthermore, good results were obtained in terms of cutting property, transfer property, crack resistance, and writing property.

[0064]

INDUSTRIAL APPLICABILITY The transfer tape for hiding correction of the present invention has excellent cuttability, transferability, crack resistance, and writing ability, and can completely hide an erroneous image and form a clear image on it.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a correction operation performed using a transfer tool equipped with a hiding correction transfer tape of the present invention.

FIG. 2 is a sketch showing the inside of the transfer tool.

[Explanation of symbols]

1 Transfer tool body 2 Pressing member 2a Pressing member tip 3 unwind reel 4 take-up reel 10 Concealment correction transfer tape 11 Transfer layer 12 Film substrate

Claims (4)

[Claims] 1. A hiding correction transfer tape comprising a film-shaped substrate and a hiding correction pressure-sensitive transfer layer containing a color pigment on one surface thereof, wherein the hiding correction pressure-sensitive transfer layer comprises a color pigment and a vehicle. Consisting of a hiding layer and a pressure-sensitive adhesive layer provided on the surface of the hiding layer, the elongation of the vehicle in the hiding layer is 3.5 × 10 ² % or more, and the hiding layer has a porosity of 30 to 50%. A transfer tape for hiding correction, which has a porous structure and has a breaking strength of 1.7 × 10 ² g / mm ² or less. 2. The hiding-correction transfer tape according to claim 1, wherein the vehicle is made of a mixture of a rubber-like resin and a glass-like resin having a low elongation. 3. The vehicle according to claim 1, wherein the vehicle is made of a mixture of a glassy resin having an elongation rate of 50% or less and a rubbery resin having an elongation rate of 4.5 × 10 ² % or more. Transfer tape for hiding correction. 4. The hiding-correction transfer tape according to claim 1, 2 or 3, wherein the color pigment is a white pigment.