JPH06166295A - Pressure-sensitive correction tape for transferred wrong-character - Google Patents

Abstract

PURPOSE:To reduce the inter-layer movement of a self-adhesive layer component, to hold adhesion for a prolonged term and to improve light resistance and stability while enhancing self-adhesive feeling. CONSTITUTION:A white concealing layer 2 consisting of a white pigment, an additive, and a high-molecular resin as a binder and an adhesion imparting agent and the high-molecular resin and the adhesion imparting agent as transfer self-adhesive layer 1 components to an adherend are used, and an alicyclic petroletun resin is compounded as the adhesion imparting agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a water-based ballpoint pen, an oil-based ballpoint pen, a marking pen, a writing line with a fountain pen, etc.
Character or PPC copy, heat transfer character in word processor, white concealing layer to correct typographical errors such as printing by a typewriter, and pressure sensitive transfer typographical error on which a transfer adhesive layer to an adherend such as paper is further provided Regarding correction tape.

[0002]

2. Description of the Related Art This type of typographical error correcting material is called collection paper, and is mainly composed of white pigments such as titanium dioxide, magnesium carbonate, calcium carbonate, silica, etc., wax additives, and polymeric resins as binders for white pigments. For example, a white ink composition obtained by dissolving or dispersing polyisobutylene, ethylene-vinyl acetate copolymer, polyvinyl methyl ether in a volatile solvent is applied to one side of a flexible supporting substrate such as plastic film or paper. Apply
A uniform ink layer after drying (Japanese Patent Publication No. 53-167)
29) (Japanese Examined Patent Publication No. 60-43314), or one provided with a writing-imparting layer comprising a thermoplastic resin and silica fine particles, and a flexible base material of a plastic film in which inorganic fine particles are kneaded (JP-A-4-216885). )It has been known.

[0003]

In the above-mentioned conventional pressure-sensitive transfer error correction material, the white hiding layer of the wound correction tape, which has become the mainstream in recent years, is used as a white hiding layer for adhesion to a supporting base material and transfer correction. It has poor peeling property, adhesiveness and tackiness, and sometimes the white hiding layer peels off only partly so that the typographical error cannot be completely hidden, or when it is extremely large, it cannot be transferred to an adherend such as paper at all. A plastic film base material with inorganic fine particles kneaded cannot be used in a large proportion of the inorganic fine particles as a concealment product, so the concealing effect is poor, and the water-based ballpoint pen and water-based marking pen on the surface to be corrected are inferior. ， When rewriting with a water-based writing instrument such as a fountain pen, there are drawbacks such as repelling ink and slow drying of writing lines and letters.

[0004]

As a result of various investigations for solving the above-mentioned drawbacks, the present invention provides a support base material and a white pigment such as titanium dioxide, magnesium carbonate, calcium carbonate or silica for correcting and concealing typographical errors. Of a polymer resin as a binder of a concealing layer made of an additive that enhances the releasability with and using an alicyclic petroleum resin as a tackifier by adding and blending it,
Furthermore, by applying an adhesive layer using a polymer resin and an alicyclic petroleum resin as a tackifier to the adhesive layer component that transfers the white hiding layer to an adherend such as paper, the pressure-sensitive transfer of winding The present invention has been completed by finding that when it is used as a typographical error correcting tape, it has excellent concealing effect, excellent aging resistance and light resistance, long-term stability, and comfortable tackiness.

[0005]

That is, the present invention relates to white pigments such as titanium dioxide, magnesium carbonate, calcium carbonate, and silica, which are suitable for correcting / concealing typographical errors, and additives for waxes for enhancing the releasability from supporting substrates. And a white hiding composition prepared by blending a polymer resin as a binder for a white pigment, and an alicyclic petroleum resin as a tackifier, and dissolving or dispersing it in a volatile solvent to support a flexible plastic film or paper. A white hiding layer is formed by applying it on a base material and drying it, and then a polymer resin and tackifier are added as an adhesive layer component that more reliably transfers the white hiding layer to an adherend such as paper. It is a pressure-sensitive transfer error correction tape provided with an adhesive layer containing an alicyclic petroleum resin as an agent. The layer structure of the pressure-sensitive transfer error correction tape is shown below as FIG.

[0006]

[Figure 1]

The tackifier alicyclic petroleum resin used in the present invention is obtained by cyclopolymerizing cyclopentadiene or dicyclopentadiene as a raw material and further hydrogenating, or by hydrogenating an aromatic petroleum resin at high temperature and high pressure. When added and blended as a tackifier, the adhesive layer has improved stability and light resistance. By generally adding and blending a tackifier to the pressure-sensitive adhesive, the magnitude of resistance to viscous flow can be adjusted, and a finely-grained tackiness can be obtained. If no tackifier is added and blended, the tackiness becomes dull, and there is no temperature sensitivity and the tackiness layer becomes sticky due to a slight temperature rise, and the tackiness is lost at low temperatures. It can be inferred from the mixing theory that it is preferable to mix a low-molecular tackifier with the polymer resin, which is the main component of the pressure-sensitive adhesive, in order to obtain good pressure-sensitive adhesive properties, tackiness, and tackiness. Those having a narrow molecular weight distribution are presumed to have good adhesive properties. The following is a table showing comparative examples of molecular weight distribution for resins having the same softening point.

By adding an alicyclic petroleum resin as a tackifier to the white hiding layer component / transfer pressure-sensitive adhesive layer component, a comfortable pressure-sensitive adhesive property can be obtained throughout the four seasons. The white hiding layer is transferred to the adherend of (1) without fail and a satisfactory tackiness is obtained.
By using the same tackifier for the polymer resin as the binder and the polymer resin for the transfer adhesive layer, the interlayer movement of the adhesive layer component is small, so the adhesive strength does not decrease even when left for a long time. , Can maintain stable adhesive strength. The amount of the alicyclic petroleum resin added and compounded is such that for the white hiding layer, the polymer resin used is, for example, styrene-butadiene, neoprene, polyisobutylene, polyacrylic acid ester, polyvinyl acetate or ethylene vinyl acetate copolymer. The optimum amount is 5 to 60 parts by weight.

The addition and blending ratio of the alicyclic petroleum resin in the transfer adhesive layer is such that tack force for adhering to an adherend such as paper with a very light force in a short period of time is required, and a stable adhesive force for a long period of time. Since it is necessary to maintain the content of 15 to 60 parts by weight with respect to the blending ratio of the polymer resin. If it is less than 15 parts by weight, the temperature sensitivity becomes poor and the stickiness at low temperature becomes poor. If it exceeds 60 parts by weight, the wound tape is defective.
For example, it was unsuitable because it tended to cause a bowl-shaped deformation and indentation.

The white pigment used in the present invention may be titanium dioxide, magnesium carbonate, calcium carbonate, silica, etc., which have been conventionally used, as an additive for improving the releasability from a supporting base material at the time of transfer correction, such as microcrystalline wax and multi-color wax. Wax, potassium oleate, potassium laurate, etc. can be used. Further, as the dispersant, a nonionic, anionic or cationic surfactant, and if necessary, an antioxidant and a stabilizer can be used.

[0011]

EXAMPLES The present invention will be described in more detail with reference to examples. Example-1 Polyvinyl methyl ether Lutonal (BASF) 10 parts by weight Alcon P-70 [alicyclic petroleum resin] (Arakawa Chemical Industries) 4〃 titanium dioxide R-820 (Ishihara Sangyo) 52〃 magnesium carbonate 5〃 microcrystalline wax 3 〃 Polyoxyethylene sorbitan monostearate [NIKKOL TS-10 (Nikko Chemicals)] 1 〃 Isopropyl alcohol 100 〃 Toluene 200 〃 Add the above composition and use a ball mill, attritor, sand grinder, etc. A white hiding composition is prepared by dispersing and mixing, and the white hiding composition is coated on a flexible supporting substrate such as a plastic film or paper with a coating machine and dried. Next, the following pressure-sensitive adhesive layer composition was applied, dried and then cut into a width of 5 mm or 6 mm to obtain a wound pressure-sensitive transfer error correction tape. Polyvinyl methyl ether Lutonal (BASF) 20 parts by weight Alcon P-70 [alicyclic petroleum resin] (Arakawa Chemical Industry Co., Ltd.) 8 〃 Isopropyl alcohol 50 〃 Toluene 100 〃 Example-2 Polyisobutylene 12 parts by weight Alcon P-70 [fat Aromatic petroleum resin] (Arakawa Chemical) 3 〃 Titanium dioxide R-820 (Ishihara Sangyo) 50 〃 Magnesium carbonate 5 〃 Microcrystalline wax 2 〃 Polyoxyethylene sorbitan monostearate [NIKKOL TS-10 (Nikko Chemicals)] 1 〃 Ethyl alcohol 100 〃 Toluene 200 〃 The above composition is used as a pressure-sensitive transfer error correction tape in the same manner as in Example-1, but the following composition is used for the transfer adhesive layer. Polyisobutylene 24 parts by weight Alcon P-70 [alicyclic petroleum resin] (Arakawa Chemical) 6 〃 Ethyl alcohol 50 〃 Toluene 100 〃 Example-3 Ethylene vinyl acetate copolymer 10 parts by weight Alcon P-90 [alicyclic] Petroleum resin] (Arakawa Chemical) 4 〃 Titanium dioxide R-820 (Ishihara Sangyo) 51 〃 Silica 5 〃 Microcrystalline wax 2 〃 Polyoxyethylene sorbitan monostearate [NIKKOL TS-10 (Nikko Chemicals)] 1 〃 Toluene 250 〃 The above composition is used as a pressure-sensitive transfer error correction tape in the same manner as in Example 1, but the following composition is used for the transfer adhesive layer. Ethylene vinyl acetate copolymer 20 parts by weight Alcon P-90 [alicyclic petroleum resin] (Arakawa Chemical Industry Co., Ltd.) 8 〃 Toluene 100 〃 Next, in Examples 1 to 3 as Comparative Examples, the composition and transfer of the white hiding layer The pressure-sensitive transfer typographical error correcting tapes of Comparative Examples 1 to 3 were prepared by making the same as the same example except that the alicyclic petroleum resin alcon of the composition of the adhesive layer was not added and blended. Comparative Example-4 The same example except that the composition of the white hiding layer and the composition of the transfer adhesive layer of Example-3 were replaced with Alcon, which is an alicyclic petroleum resin, and the same amount of natural rosin was added. A pressure-sensitive transfer error correction tape was prepared in the same manner as in 3.

The results of a test comparison of the tackiness, light resistance and stability of each example and comparative example are shown in the table. -Test method-Adhesion: Room temperature is 15 ° C, 25 ° C, 35 ° C, and humidity is 65 each.
The transfer correction operation was performed in the room adjusted to%, and the transfer feeling of the tape and the transfer degree of the white hiding layer were observed. ⊚: The white hiding layer has good adhesiveness at each room temperature and is completely transferred to the adherend. ◯: The tackiness was poor at a part of room temperature, but the white hiding layer was completely transferred to the adherend. Δ: The tackiness was poor at a part of room temperature, and the transfer of the white hiding layer was partially incomplete. X: The tackiness was poor at each room temperature, and the transfer of the white hiding layer was poor. Light resistance: The corrected surface transferred to a paper adherend was exposed to sunlight together with blue scale, and compared with standard fading of blue scale. ⊚: No change in the white hiding layer even when the color faded by grade 6. ◯: The white hiding layer is discolored due to Grade 5 fading. X: The white hiding layer is discolored due to the fourth grade fading. Stability: Transfer correction tape is stored in a room at 40 ° C and 60% constant temperature and humidity for 12 months, then taken out and kept at room temperature for 5
After standing for a while, the degree of transfer of the white hiding layer was checked. A: The white hiding layer is completely transferred. ◯: The white hiding layer is almost completely transferred. X: Incomplete transfer of the white hiding layer.

[0013]

The pressure-sensitive transfer typographical error-correcting tape containing an alicyclic petroleum resin as a tackifier for the polymeric resin of the white hiding layer and the transfer adhesive layer of the present invention has a layer transfer of the adhesive layer components. It has a small amount of tackiness and can be retained for a long period of time. Compared to the one with natural rosin added as a tackifier, it has excellent light resistance and stability. It was excellent in feeling and long-term stability.

[Brief description of drawings]

FIG. 1 is a diagram showing a layer structure of a pressure-sensitive transfer error correction tape. 1 Transfer Adhesive Layer 2 White Hiding Layer 3 Flexible Support Base Material

Claims (3)

[Claims] 1. A white pigment, an additive, and a polymer resin as a binder and a tackifier as main components, which are dissolved or dispersed in a volatile solvent on one surface of a supporting substrate of a plastic film or paper. A white hiding layer formed by applying and drying a white hiding composition is provided, and a transfer pressure-sensitive adhesive layer for transfer to an adherend such as paper composed of a polymer resin and a tackifier is further provided on the white hiding layer. tape. 2. A pressure-sensitive transfer typographical error correcting tape comprising an alicyclic petroleum resin as a tackifier for a polymer resin as a binder component of a white hiding layer. 3. A pressure-sensitive transfer error correction tape comprising an alicyclic petroleum resin as a tackifier for a polymer resin of a transfer adhesive layer to an adherend such as paper.