JPH06166294A - Pressure-sensitive correction tape for transferred wrong-character - Google Patents

Abstract

PURPOSE:To improve light resistance and stability for a prolonged term, and to enhance self-adhesive feeling of the tape wherein a white concealing layer and a transfer self-adhesive layer component are difficult to be oxidized and the inter-layer movement of a self-adhesive layer component is reduced. CONSTITUTION:A white concealing layer 2 consisting of a white pigment, an additive, 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 a hydrogenated rosin is compounded as the adhesion imparting agent.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a water-based ballpoint pen, an oil-based ballpoint pen, a marking pen, a writing line such as a fountain pen,
Character or PPC copy, thermal 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 surface of a flexible supporting substrate such as a 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 composed of 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]

The above-mentioned conventional pressure-sensitive transfer typographical error correcting material is used as a white hiding layer of a wound correction tape which has become mainstream in recent years. The peeling property, the adhesive strength and the tack strength are poor, and sometimes the white hiding layer peels off only partly so that the typographical error cannot be completely covered, and when it is severe, it cannot be transferred to an adherend such as paper at all. Further, in the case where the base material of the plastic film is kneaded with the inorganic fine particles, it is impossible to increase the ratio of use of the inorganic fine particles as the concealing material, so that the concealing effect is poor, and the correction surface is further water-based ballpoint pen, water-based. When rewriting with a water-based writing instrument such as a marking pen or a fountain pen, there are drawbacks such as repelling ink and slow drying of writing lines and letters.

[0004]

According to the present invention, as a result of various investigations for solving the above-mentioned drawbacks, titanium dioxide, magnesium carbonate, calcium carbonate for correcting and concealing typographical errors,
A polymer resin as a binder of a hiding layer comprising a white pigment such as silica and an additive that enhances the releasability of the supporting substrate, and a hydrogenated rosin derivative-hydrogenated rosin as a tackifier is added and used. Furthermore, by applying an adhesive layer using a polymer resin and a hydrogenated rosin derivative-hydrogenated rosin as a tackifier to the adhesive layer component that transfers the white hiding layer to an adherend such as paper, The present invention has been completed by finding out that when it is used as a pressure-sensitive transfer error correction tape, it has excellent concealing effect, excellent aging resistance and light resistance, and long-term stability and comfortable adhesive feeling.

[0005]

In other words, the present invention provides white pigments such as titanium dioxide, magnesium carbonate, calcium carbonate, and silica which are suitable for correcting / concealing typographical errors, and wax additives for enhancing the releasability from supporting substrates. And a polymer resin as a binder of a white pigment, and a hydrogenated rosin derivative-hydrogenated rosin as a tackifier, and a white hiding composition prepared by dissolving or dispersing in a volatile solvent is applied to a plastic film or paper. A white hiding layer is formed by coating and drying on a flexible supporting substrate, and a polymer resin is further provided as an adhesive layer component for more reliably transferring the white hiding layer to an adherend such as paper. And a pressure-sensitive transfer typographical error correcting tape provided with an adhesive layer containing a hydrogenated rosin derivative-hydrogenated rosin as a tackifier. The layer structure of the pressure-sensitive transfer error correction tape is shown below as FIG.

[0006]

[Figure 1]

The tackifier hydrogenated rosin used in the present invention is obtained by hydrogenating natural rosin at high temperature and high pressure, and is treated with abietic acid which is the main component of rosin. Hydrogenation of abietic acid, which is the main component of natural rosin, produces dihydroabietic acid, and the unsaturated double bond, which is most easily oxidized, disappears, so that it is less susceptible to air oxidation and aging resistance and light resistance are improved. 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. 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.

By adding and blending hydrogenated rosin as a tackifier to the white hiding layer component and the transfer adhesive layer component,
The white hiding layer / transfer pressure-sensitive adhesive layer is not only resistant to oxidation and stable even when left in the air for a long period of time, but also provides a comfortable pressure-sensitive adhesive feeling throughout the four seasons.

The proportion of hydrogenated rosin added is that of the polymer resin used for the white hiding layer, such as styrene-butadiene, neoprene, polyisobutylene, polyacrylic ester, polyvinyl acetate, ethylene vinyl acetate copolymer. The optimum amount is 5 to 60 parts by weight. Regarding the blending ratio of hydrogenated rosin in the transfer adhesive layer, it is necessary to have a tack force for adhering to an adherend such as paper with a very light force in a short period of time, and to maintain a stable adhesive force for a long period of time. Therefore, 15 to 60 parts by weight was optimum for 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.
When the amount is 60 parts by weight or more, defective winding of the tape is apt to occur, for example, deformation of a tape or winding cavities is not suitable.

The white pigment used in the present invention is titanium dioxide, magnesium carbonate, calcium carbonate, silica, etc., which have been conventionally used, for improving the releasability of the flexible support base material and the white hiding layer during transfer correction. As an additive, microcrystalline wax, multi-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 Hydrogenated rosin Hyper (Arakawa Chemical Industry Co., Ltd.) 4 〃 Titanium dioxide R-820 (Ishihara Sangyo) 52 〃 Magnesium carbonate 5 〃 Microcrystallin wax 3 〃 Polyoxyethylene sorbitan monostea Rate [NIKKOL TS-10 (Nikko Chemicals)] 1 〃 Isopropyl alcohol 100 〃 Toluene 200 〃 The above composition is blended and sufficiently dispersed / mixed with a disperser such as a ball mill, attritor or sand grinder to give a white hiding composition. An article is prepared, which is coated on a flexible supporting substrate such as a plastic film or paper by a coater 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 Hydrogenated rosin high pale (Arakawa Chemical) 8 〃 Isopropyl alcohol 50 〃 Toluene 100 〃 Example-2 Polyisobutylene 12 parts by weight Hydrogenated rosin high pale (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 〃 Example-1 A pressure-sensitive transfer typographical error correcting tape is prepared in the same manner as, but the following composition is used for the transfer adhesive layer. Polyisobutylene 24 parts by weight Hydrogenated rosin high pale (Arakawa Chemical) 6 〃 Ethyl alcohol 50 〃 Toluene 100 〃 Example-3 Ethylene vinyl acetate copolymer 10 parts by weight Hydrogenated rosin high pale (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 was pressure sensitive in the same manner as in Example-1. Although the transfer error correction tape is used, the following composition is used for the transfer adhesive layer. Ethylene vinyl acetate copolymer 20 parts by weight Hydrogenated rosin Hyper (Arakawa Chemical Co., Ltd.) 8 〃 Toluene 100 〃 Next, in Examples 1 to 3 as Comparative Examples, hydrogenation of the composition of the white hiding layer and the composition of the transfer adhesive layer Other than rosin-hyper was added and blended, but the same procedure as in the same example was made to make the pressure-sensitive transfer error correction tape of Comparative Examples 1 to 3. Comparative Example-4 The same as Example-3 except that the composition of the white hiding layer and the composition of the transfer adhesive layer of Example-3 were replaced with the same amount of natural rosin in place of Hypal which was a hydrogenated rosin. Then, the pressure-sensitive transfer typographical error correcting tape was prepared. The results of the test comparison of the tackiness, light resistance and stability of each example and the 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 modified surface transferred to a paper adherend was exposed to sunlight together with a blue scale, and compared with standard fading of blue scale. ⊚: No change in white hiding layer even with 6th grade fading. ◯: 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 at 40 ° C and 60% in a room with 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.

[0012]

The white hiding layer and transfer adhesive layer of the present invention are
The pressure-sensitive transfer typographical error correction tape containing hydrogenated rosin added contains natural rosin added as a tackifier,
Compared to the case where no tackifier is added and compounded, the white hiding layer / transfer adhesive layer component is less likely to be oxidized and the interlayer migration of the adhesive layer component is small, so that it is excellent in light resistance and long-term stability, and also has an adhesive feeling.・ The tack force was also excellent and extremely excellent.

[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 (2)

[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 made of a polymer resin and a tackifier is further provided thereon. tape. 2. A pressure-sensitive transfer typographical error-correcting tape comprising a hydrogenated rosin derivative-hydrogenated rosin 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 a hydrogenated rosin derivative-hydrogenated rosin as a tackifier for a polymer resin of a transfer adhesive layer onto an adherend such as paper.