JP3038201B1 - Pressure-sensitive transferability correction tape - Google Patents

Abstract

The present invention provides a pressure-sensitive transferability correcting tape which uses a thin plastic film for a support and has excellent transferability and the like. SOLUTION: This pressure-sensitive transferability correcting tape comprises a support, on which at least a concealing layer and a pressure-sensitive adhesive layer are sequentially provided, wherein the support is made of a plastic film, the thickness of the support is Y, and the concealment is performed. When the total thickness of the layer and the pressure-sensitive adhesive layer is X, Y ≦ 25 μm X / Y ≧ 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive transferability correcting tape used for concealing and correcting characters or the like erroneously recorded on paper or the like.

[0002]

2. Description of the Related Art This type of pressure-sensitive transferable correction tape has been conventionally known. Basically, a concealing layer composed of a pigment such as a white pigment and a binder and a pressure-sensitive adhesive layer are sequentially formed on a support. It has a laminated structure. Generally, glassine paper is used as the support. Usually, this pressure-sensitive transferability correcting tape is used by being mounted on a hand-held transfer tool.

This transfer tool basically comprises a case (holder), an unwinding reel and a take-up reel for a pressure-sensitive transferable correction tape, and a head for pressing the pressure-sensitive transferable correction tape against a surface to be corrected. It is composed of When the holder is moved while the head is pressed against the surface to be corrected, the correction tape is paid out from the unwinding reel, and is sequentially pressed against the surface to be corrected by the head and adhered on the pressure-sensitive adhesive layer side. On the other hand, the support is separated from the transfer layer (a laminate of the concealing layer and the pressure-sensitive adhesive layer) after passing through the head, and is wound on a take-up reel. When the transfer of the transfer layer to the portion to be corrected on the surface to be corrected is completed, the head is strongly pressed against the surface to be corrected, and then the holder is lifted up, whereby the transfer layer is cut and the correction operation is completed. Characters and the like can be written on the concealing layer of the transfer layer transferred to the surface to be corrected with a writing implement such as a ball-point pen.

[0004]

In recent years, there has been a demand for a compact transfer tool or a longer correction tape, and accordingly, a thinner correction tape has been required. In order to reduce the thickness of the pressure-sensitive transferability correcting tape, it is conceivable to use a thinner support. However, glassine paper which has been generally used in the past has a limit of about 30 μm from the viewpoint of strength. Therefore, it was considered to use a plastic film for the support,
According to the study of the present inventors, when simply using a thin plastic film, transferability and the like may be deteriorated,
It turned out to be problematic in practical use. Here, the transferability of the pressure-sensitive transferability correcting tape means that when pressure is applied to the transfer layer, that portion is easily cut off from other portions, an excess portion is not transferred, and the portion where the pressure is applied is It means that the transfer layer is completely transferred.

In view of the foregoing, it is an object of the present invention to provide a pressure-sensitive transferability correcting tape which uses a thin plastic film for a support and has excellent transferability and the like.

[0006]

The invention according to claim 1 is
At least a concealing layer and a pressure-sensitive adhesive layer are sequentially provided on a support, and a binder and fine particles are provided between the support and the concealing layer.
A pressure-sensitive transferability correcting tape provided with a release layer comprising: a support made of a plastic film, wherein the thickness of the support is Y, and the total thickness of the concealing layer and the pressure-sensitive adhesive layer is X. The present invention relates to a pressure-sensitive transferability correcting tape, wherein Y ≦ 25 μm X / Y ≧ 1.

[0007]

[0008] The invention according to claim 2, the support is a polyester film, a pressure-sensitive transferable correction tape of claim 1, wherein the binder of the release layer is a silicone resin.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have intensively studied to solve the problems when using a thin plastic film for the support. When the pressure-sensitive transferability correcting tape is mounted on the transfer tool of the hand-held type and transferred, the plastic film is used to effectively transfer the pressing force of the head to the transfer layer via the plastic film to improve the transferability. Although it should have been thinner, the transferability was not so good even if a thin plastic film was simply used, but rather it was sometimes deteriorated. However, when the thickness Y of the plastic film is set to 25 μm or less while maintaining the relationship of X / Y ≧ 1 between the thickness Y of the plastic film and the total thickness X of the concealing layer and the pressure-sensitive adhesive layer, It was surprisingly found that the transferability was dramatically improved. The reason for this is not clear, but when transferring the correction tape by pressing it with the head, the balance between the cushioning property of the transfer layer and the rigidity of the plastic film is important. It is estimated that the balance is good.

In the present invention, however, a plastic film having a thickness of 25 μm or less can be used as the support, so that the transfer tool can be made compact or the correction tape can be lengthened.

Next, the present invention will be described in detail.

The pressure-sensitive transferable correction tape of the present invention has a structure in which a concealing layer and a pressure-sensitive adhesive layer are sequentially provided on one side of a plastic film as a support.

As the plastic film, a polyester film such as a polyethylene terephthalate (PET) film, a polyethylene film, a polypropylene film and the like can be used. In terms of strength,
Polyester films are particularly preferred. As described above, the thickness of the plastic film needs to be 25 μm or less. The lower limit of the thickness of the plastic film is not particularly limited. However, if the thickness is too small, the productivity at the time of processing such as a mold release treatment is reduced. Therefore, the thickness is preferably 6 μm or more.
Back side of plastic film as support (hiding layer,
(The surface opposite to the side on which the pressure-sensitive adhesive layer is provided, hereinafter the same)
If necessary, a release layer made of a silicone resin, a fluororesin, or the like may be formed to prevent adhesion (blocking) between the pressure-sensitive adhesive layer and the back surface of the support during storage. Good.

The concealing layer in the present invention is not particularly limited, and any conventional concealing layer can be used. Usually, the hiding layer comprises a pigment and a binder and, if necessary, a filler.

In the pressure-sensitive transferability correcting tape of this type, in addition to the transferability, when the transfer layer is transferred to a desired portion, the transfer layer does not crack (hereinafter, referred to as "transfer layer").
It is required that all the requirements such as writing resistance (hereinafter referred to as writing resistance) such as a pencil or a ballpoint pen on the transferred transfer layer (hereinafter referred to as writing resistance) be achieved satisfactorily.

In the concealing layer of the present invention, it is preferable to appropriately select the composition and the like of the concealing layer so as to improve the crack resistance and the writability as well as the transferability.

The binder used in the concealing layer in the present invention preferably 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. If the elongation is less than 3.5 × 10 ² %, the crack resistance tends to be poor and local non-transfer tends to occur. The upper limit of the elongation of the binder is usually 5.2 ×
10 ² %.

As the material of the binder, a rubber-like resin can be used alone or in a mixture so as to satisfy the elongation.

The binder material is composed of a combination of a rubber-like resin and a glass-like resin, especially a rubber-like resin having an elongation of 4.5 × 10 ² % or more and an elongation of 50% or less. Those composed of a combination with a glassy resin can be suitably used.

The rubbery resin is preferably one having flexibility even if it contains only a small amount of a plasticizer. For example, styrene-butadiene-styrene block copolymer (SBS) and styrene-ethylene-butylene-styrene block copolymer may be used. Polymer (SEBS), styrene-butadiene rubber, styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene / propylene block copolymer (SEP), polyurethane resin, urethane rubber, fluoro rubber, acrylonitrile-butadiene rubber ,
One or more of ordinary synthetic rubbers or rubber-like resins such as ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, chlorosulfonated polyethylene, and cyclized rubber may be used.

The glassy resin preferably has a low elongation, a melting point or a 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, ketone resins, vinyl chloride-vinyl acetate copolymer resins, polyethylene, polypropylene and the like. And one or more of such polyolefin resins.

When the rubbery resin and the glassy resin are used in combination, the mixing ratio thereof may vary depending on the elongation of the rubbery resin and the elongation of the glassy resin. It is preferable to adjust the ratio to be 3.5 × 10 ² % or more. At that time, the elongation is 4.5 ×
By using a combination of a rubber-like resin of 10 ² % or more and a glass-like resin having an elongation of 50% or less, a binder having more excellent properties in terms of flexibility, writability, cutability and the like can be obtained. be able to. Specifically, 10 parts of rubber-like resin (parts by weight, the same applies hereinafter) are added to glass-like resin
-30 parts, preferably 5-15 parts. The binder obtained in such a mixing ratio has a suitable elasticity and forms a concealing layer having excellent writing properties on the concealing layer after transfer.
If the content of the glassy resin exceeds the above range, or if only the glassy resin is used, the flexibility of the concealing layer is lost, and cracks are likely to occur during transfer. If the content of the glassy resin is less than the above range, the writing property is deteriorated and the cutting property of the concealing layer is reduced. When the binder is composed of only a rubber-like resin, the cutting property is further reduced.

The concealing layer has a good cutting property,
It is preferable to use a porous structure. From this point, a filler is usually mixed. Examples of the filler include magnesium carbonate, calcium carbonate, barium carbonate, barium sulfate, aluminum oxide, silicon dioxide, celite, clay, and talc. The particle size of the filler is 1 to 20
The range of μm is preferred. If the particle size is too small, the cuttability tends to decrease, while if too large, the writability tends to deteriorate.

The filler is 5 parts per 10 parts of the binder.
４０40 parts, preferably 5-18 parts.
If the amount of the filler is too large, a choking phenomenon occurs. On the other hand, if the amount of the filler is insufficient or not used at all, the cutting property of the concealing layer tends to decrease.

Since the object to be corrected is generally white paper, the concealing layer is usually colored white using a white pigment. However, when the object is colored paper other than white, the concealment layer is colored almost the same color as the ground color of the object, so that the corrected part is indistinguishable from the ground part. Is preferred.

As the white pigment, titanium oxide powder is mainly used because of its excellent hiding power. The amount of the coloring pigment to be used depends on the dispersibility in the binder, the hiding power, and the like, but is 5 to 40 parts, preferably 10 to 20 parts, per 10 parts of the binder. If the amount of the coloring pigment used is too large, a chalking phenomenon in which the pigment powder is deposited on the surface of the concealing layer occurs, and if the amount used is too small, the concealing power tends to be insufficient.

The thickness of the concealing layer (refers to the thickness after drying,
The same applies hereinafter), preferably in the range of 10 to 40 μm, more preferably 12 to 30 μm. If the thickness is less than the above range, the concealing power is insufficient, while if the thickness exceeds the above range, the cuttability at the time of transfer is reduced, the writeability after transfer is reduced, or the corrected paper is When copying, the boundary between the corrected part and the uncorrected part tends to be shadowed and copied, making it hard to see.

The pressure-sensitive adhesive layer in the present invention is not particularly limited, and any conventional pressure-sensitive adhesive layer can be used. For example, as the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer, pressure-sensitive adhesives such as acrylic resin, rosin, rubber, vinyl ether resin, and polyisobutylene can be used. The pressure-sensitive adhesive layer can be formed by applying an organic solvent solution, an organic solvent dispersion, an aqueous solution or an aqueous dispersion (including an emulsion) of the pressure-sensitive adhesive on the concealing layer and drying. The thickness of the pressure-sensitive adhesive layer is suitably about 0.8 to 5 μm.

In the present invention, the total thickness X of the concealing layer and the pressure-sensitive adhesive layer is related to the thickness Y of the plastic film,
That is, the selection is made such that the relationship of X / Y ≧ 1 is satisfied. In the present invention, further particles containing a releasing layer provided between the plastic film and the hiding layer as a support
You . When a plastic film is used as the support, the surface of the transferred concealing layer may be glossy and uncomfortable because the surface is smoother than the surface of the paper to be modified, but the particle-containing separation By providing the mold layer, the surface of the transferred concealing layer can be made not to exhibit luster. The particle-containing release layer may be non-transferable or may be peelable in the layer. This particle-containing release layer is composed of a binder and fine particles,
Examples of the binder include silicone resins, fluororesins, and waxes. Examples of the fine particles include inorganic, silica, zirconia, and titanium oxide, and organic-based melamine resins and high-molecular-weight polyethylene wax.

[0030]

EXAMPLES Next, the present invention will be described specifically with reference to experimental examples and examples, but the present invention is not limited thereto.

Experimental Example A hiding layer having the following formulation was formed on one surface of the support shown in Table 2. Component Weight parts Titanium oxide (particle size: 0.1 to 1 μm) 50.0 Magnesium carbonate (particle size: 1 to 10 μm) 19.0 Styrene-ethylene-butylene-styrene copolymer 14.0 (elongation: 750%) Fat Cyclic saturated hydrocarbon (0% elongation) 14.0 Dispersant (Homogenol L-18) 3.0 (Elongation of binder: 370%)

That is, 100 parts of the total amount of the above materials and 163 parts of toluene were mixed for 20 minutes by a disperser to prepare a coating liquid. This was applied on one side of the support with a coater and dried to form a concealing layer. Next, an aqueous dispersion (solid content: 20% by weight) of an acrylic resin-based pressure-sensitive adhesive is formed on the surface of the concealing layer.
Was applied and dried to form a pressure-sensitive adhesive layer to obtain a pressure-sensitive transferability correcting tape. The thickness of the concealing layer and the pressure-sensitive adhesive layer and the total thickness of both are as shown in Table 1. The support used is as shown in Table 2. By combining the type and thickness Y of the support and the total thickness X of the concealing layer and the pressure-sensitive adhesive layer as shown in Table 2, a total of 35 types of pressure-sensitive transferability correcting tapes were prepared.

Each of the obtained pressure-sensitive transferable correction tapes is 5 mm in width.
While slit, the core was wound up to a length of 10 m to obtain a pancake-shaped correction tape. Each of the obtained pancake-shaped correction tapes was mounted on a commercially available transfer tool, and a full-length (10 m) running test was performed. Whether or not transfer failure to high-quality paper occurred was observed, and the transferability was evaluated according to the following criteria. . Table 2 shows the results. ：: Transfer failure does not occur ×: Transfer failure occurs

[0034]

[Table 1]

[0035]

[Table 2]

From the results shown in Table 2, it can be seen that X is between the thickness Y of the PET film and the total thickness X of the concealing layer and the pressure-sensitive adhesive layer.
/ Y ≧ 1 while maintaining the relationship of PET film thickness Y
When the particle size is set to 25 μm or less, poor transfer does not occur, and it can be seen that transferability is excellent.

Example A coating liquid having the following formulation was applied to one side of a PET film having a thickness of 12 μm and dried to form a particle-containing release layer having a thickness of 0.5 μm. Ingredient Parts by weight Silicone resin 25.0 Silica particles (average particle size 1.5 μm) 0.5 Toluene 37.5 Xylene 37.5

On the other side of the PET film, a coating liquid excluding the silica particles from the coating solution was applied and dried to form a release layer having a thickness of 0.5 μm.

Next, a concealing layer having a thickness of 23.8 μm and a thickness of 1.2 μm were formed on the particle-containing release layer in the same manner as in the experimental example.
A μm pressure-sensitive adhesive layer was formed to prepare a pressure-sensitive transferability correcting tape.

A pancake-shaped correction tape was obtained from the obtained pressure-sensitive transferability-correcting tape in the same manner as in the experimental example. The correction tape was mounted on a commercially available transfer tool and transferred to high-quality paper. No gloss was observed in the shaded portion, and there was no uncomfortable feeling.

[0041]

According to the present invention, a thin plastic film having a thickness of 25 μm or less is used for the support, and X / Y ≧ 1 between the thickness Y of the support and the total thickness X of the concealing layer and the pressure-sensitive adhesive layer. The related pressure-sensitive transferability correcting tape of the present invention exhibits excellent transferability.

[0042] Further, since providing a particle-containing release layer between the support and the hiding layer, the surface of the transferred hiding layer showed no gloss, no discomfort.

Continuation of the front page (56) References JP-A-10-219202 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C09J 7/02

Claims (2)

(57) [Claims] 1. A method according to claim 1, wherein at least a concealing layer and a pressure-sensitive adhesive layer are sequentially provided on the support.
Pressure-sensitive transferability correcting tape provided with a release layer consisting of a binder and fine particles , wherein the support is made of a plastic film, the thickness of the support is Y, the total thickness of the concealing layer and the pressure-sensitive adhesive layer Where X is Y, and Y ≦ 25 μm X / Y ≧ 1. 2. The support is a polyester film,
Pressure-sensitive transferable correction tape of claim 1, wherein the binder of the release layer is characterized by comprising the silicone resin.