JP2011126242A - Pressure-sensitive transfer correcting tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive transfer correcting tape which shows successful drying of aqueous ink even after rewriting on a transfer coat in the aqueous ink following the correction, does not cause feathering phenomenon after writing, has three layers formed on one surface of a base and can be manufactured at a conventional cost. <P>SOLUTION: This pressure-sensitive transfer correcting tape includes a concealing layer and an adhesive layer formed on a base with a release layer formed on both surfaces of the base layer. The tape is characteristic in that the concealing layer contains 1 to 10 wt.% of at least one kind selected from the group consisting of a polyethylene glycol, a polypropylene glycol, a polyethylene glycol polypropylene glycol random copolymer and a polyethylene glycol polypropylene glycol block copolymer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a pressure-sensitive correction tape used for concealing and correcting characters or the like that are erroneously recorded on a paper surface.

Conventionally, pressure-sensitive copies such as ballpoint pens, fountain pens, sign pens, marker pens and other writing instruments, laser printers, inkjet printers, thermal printers, etc., PPC copy copies, etc. that cannot be erased with erasers are deleted. In some cases, cassette-type pressure-sensitive transfer correction tapes having an automatic winding mechanism are provided.

  However, since the ink used for the conventional hiding layer is solvent-based, a resin having a low polarity and a low surface tension is mainly used as a resin as a binder. When re-written with a writing instrument that uses water-based ink mainly composed of water with high polarity and high surface tension, the ink does not penetrate easily, resulting in slow drying. When written, written characters may blur. In addition, writing instruments using water-based gel ink, which has been generalized for office use in recent years, are similarly poorly dry, and written characters may blur.

  In response to this problem, Patent Document 1 discloses a pressure-sensitive transfer correction tape in which a release layer, an ink receiving layer, a hiding layer, and an adhesive layer are sequentially laminated on a base material. After the transfer, the ink receiving layer comes to the surface, and the water-based ink rapidly penetrates through the ink receiving layer. With this configuration, a four-layer structure is formed, the material cost and coating cost of the ink receiving layer are generated, the cost is increased, and it is not accepted as an inexpensive pressure-sensitive transfer correction tape required by the market.

JP 2008-221556 A

  The present invention is a pressure-sensitive transfer correction tape provided with three layers on one surface on a base material, and the manufacturing cost remains as before, and after correction, the ink is rewritten on the transfer coating film with water-based ink. The present invention also provides a pressure-sensitive transfer correction tape in which water-based ink is dried well and does not cause bleeding after writing.

The present invention relates to a pressure-sensitive correction tape in which a concealing layer and an adhesive layer are provided on a base material provided with release layers on both sides, and the concealing layer includes polyethylene glycol, polypropylene glycol, polyethylene glycol polypropylene glycol random copolymer and polyethylene glycol polypropylene. A pressure-sensitive transfer correction tape containing 1 to 10% by weight of at least one selected from glycol block copolymers.

When the pressure-sensitive transfer correction tape of the present invention is rewritten with a writing instrument using water-based ink or water-based gel ink after correction, the ink penetration and drying properties are improved, and smearing occurs even when the ink is smudged or contacted. There is no manufacturing cost.

As the base material used in the present invention, a plastic film or paper is used. As the plastic film, a polyester film such as a polyethylene terephthalate (PET) film, a polyethylene film, a polypropylene film, or the like can be used. From the viewpoint of strength, a polyester film is particularly preferable. The thickness of the plastic film is preferably 3 to 25 μm. If the thickness of the plastic film is too thin, productivity at the time of processing such as mold release processing is lowered. Moreover, if the thickness of the plastic film is too thick, it is difficult to make the length longer. As paper, glassine paper or the like is used. In order to increase the length, a plastic film is used.

  The release layer provided on both sides of the substrate is coated with a release agent consisting of a silicone resin or fluorine resin, or a mixture of release modifiers, additives, inorganic / organic fine particles, etc. with a release agent. Dry and set up. For the release layers provided on both sides, different release agents can be selected as necessary. The thickness of the release layer is in the range of 0.05 to 3 μm, more preferably 0.1 to 1 μm.

  The masking layer is composed of a binder, a pigment, a dispersant, an additive, and the like.

  At this time, as an essential component of the hiding layer, it contains 1 to 10% by weight of at least one selected from polyethylene glycol, polypropylene glycol, polyethylene glycol polypropylene glycol random copolymer and polyethylene glycol polypropylene glycol block copolymer, so When rewriting with an ink writing instrument, water-based ink is likely to permeate and dry faster. As a result, bleeding does not occur, and even when the writing part is touched, dirt is not generated.

If the content of the essential component is less than the above range, the effect of improving ink permeability is not observed, and if the content exceeds the above range, the concealing layer becomes brittle, and cracks and local transfer failures are likely to occur. . Further, if a melting point of 30 ° C. or higher is selected from the essential components, the preservability of the pressure-sensitive transfer tape in the state of being wound around the feeding core is further improved.

As the binder used for the concealing layer, urethane-based, acrylic-based, vinyl-based, olefin-based and rubber-based resins can be used alone or in combination of two or more. In particular, a combination of a rubber-like resin and a glass-like resin can be suitably used because the balance between the flexibility and the cutting property of the coating film for the concealment layer is good. As the rubber-like resin, those having flexibility even if containing only a small amount of plasticizer are preferable. For example, styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS). ), Styrene-butadiene rubber (SBR), styrene-isoprene-styrene block copolymer (SIS), urethane rubber, acrylonitrile-butadiene rubber, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, chlorosulfonated Examples include ordinary synthetic rubber or elastomer such as polyethylene and cyclized rubber. The glassy resin preferably has a low elongation, a melting point or softening point of 100 ° C. or higher, and a high hardness, such as a saturated or unsaturated alicyclic hydrocarbon resin, styrene-acrylic copolymer resin. And polyolefin resins such as ketone resin, polyethylene, and polypropylene.

As the pigment, since the object to be corrected is usually white paper, a white pigment is used. However, when the object is other than white, it is preferable that the concealment layer is colored in substantially the same color as the ground color of the object so that the corrected part is not conspicuous compared with the other parts. As the white pigment, titanium oxide is mainly used because of its excellent hiding power. In view of concealability, the white pigment preferably has a particle size of about 0.1 to 2.0 μm.

  In addition to the white pigment, a color adjusting agent for adjusting the color may be mixed. For example, aluminum powder, copper powder, brass powder, dye and the like can be mentioned.

  Color pigments other than white pigments include titanium yellow, iron oxide, ultramarine, cobalt blue, chromium oxide green, yellow lead, chromium vermillion, cadmium yellow, cadmium red, and other inorganic pigments, azo lakes, hansa, benzimidazo Organic pigments such as rhon, monoazo, pyrazolone, condensed azo, phthalocyanine, quinacridone, perylene, dioxazine, anthraquinone, and isoindolinone are listed.

When the masking layer is colored in a color other than white, it is preferable that the color pigment other than the white pigment is used in combination with titanium oxide so as to compensate for the relatively poor masking power.

  The concealing layer is usually used in combination with extender pigments from the viewpoint of obtaining good cutting properties. Examples of extender pigments include magnesium carbonate, calcium carbonate, barium carbonate, barium sulfate, aluminum oxide, silicon dioxide, celite, clay, and talc. The particle size of the extender is preferably in the range of 1 to 20 μm.

  The total pigment content in the masking layer is preferably in the range of 65 to 85% by weight, and the extender pigment is preferably in the range of 5 to 50% by weight in the masking layer.

  The concealing layer is coated on the base material with a coating solution containing a binder component, an organic solvent solution, an organic solvent dispersion or an aqueous dispersion (including an emulsion), a pigment, and a dispersant and additives as necessary. It can be formed by drying. The thickness of the masking layer after drying is preferably in the range of 15 to 40 μm.

  As the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer, for example, acrylic resin-based, rosin-based, rubber-based, vinyl ether resin-based, or polyisobutylene-based pressure-sensitive adhesives can be used. Further, if necessary, an adhesive strength adjusting agent, an additive, inorganic / organic fine particles, and the like can be mixed. The thickness of the adhesive layer after drying is preferably in the range of 0.5 to 3.0 μm.

The adhesive layer can be formed by applying and drying an organic solvent solution, an organic solvent dispersion, an aqueous solution or an aqueous dispersion (including an emulsion) of an adhesive on the concealing layer. It is particularly preferable to apply in the form of an aqueous solution or an aqueous dispersion. This is because when these are used, re-dissolution of the already formed concealing layer does not occur. In the case of an aqueous solution or aqueous dispersion, a wetting agent or a surfactant may be added.

  The pressure-sensitive transfer correction tape of the present invention can be suitably used in the above-mentioned hand-held transfer tool.

Examples 1-4, Comparative Examples 1-3

  On one side of a 12 μm thick polyethylene terephthalate film as a base material, a release agent composed of a silicone resin was applied so as to have a thickness after drying of 0.3 μm, and dried to form a release layer side release layer. .

  Next, a release agent made of another silicone resin is applied to the surface on the opposite side of the masking layer side release layer of the base material so that the thickness after drying becomes 0.3 μm, and dried to form an adhesive layer. A back side release layer in contact with was formed.

  Subsequently, the material of the concealing layer coating solution shown in Table 1 was mixed with a disperser for 20 minutes to prepare a concealing layer coating solution. This coating solution was applied on the masking layer side release layer of the substrate so that the thickness after drying was 25 μm and dried to form a masking layer.

  Further, an acrylic pressure-sensitive adhesive (coating liquid solid content 20% by weight) was coated on the masking layer so that the thickness after drying was 1.5 μm, and dried to provide Examples 1-4 and Comparative Examples 1-3. A pressure-sensitive transfer correction sheet was prepared.

The obtained pressure-sensitive transfer correction sheet was wound around a feeding core having a diameter of 13 mm and a length of 10 m while slitting to a width of 5 mm to obtain a pancake-shaped pressure-sensitive transfer correction tape.

The pancake-like pressure-sensitive transfer correction tape was attached to a commercially available hand-held type film transfer tool (Instalite II manufactured by Fujiko Pian Co., Ltd.), and the following evaluation was performed.

(1) Drying On the concealing layer transferred onto the PPC paper using the coating film transfer tool, spiral writing is performed with an aqueous ballpoint pen (V-cone manufactured by Pilot) and an aqueous gel ink ballpoint pen (Hitech 05 manufactured by Pilot). After 10 seconds, the handwriting was rubbed with a finger to check whether the handwriting was stained with water-based ink, and evaluated according to the following criteria.
○: There is no stain due to the water-based ink of the handwriting ×: Table 1 shows the evaluation results where there is a stain due to the water-based ink of the handwriting.

(2) Transferability A running test of 150 mm at a transfer load of 300 gf and 1200 mm / min was performed 10 times on PPC paper, and the number of transfer defects was observed and evaluated according to the following criteria.
○: Only one place occurred or did not occur at all Δ: Two places occurred x: Three or more places occurred ○ is a practical area. The evaluation results are shown in Table 1.
Table 1 (parts by weight)

Claims (1)

Pressure-sensitive correction tape having a concealing layer and an adhesive layer on a base material provided with a release layer on both sides, selected from polyethylene glycol, polypropylene glycol, polyethylene glycol polypropylene glycol random copolymer and polyethylene glycol polypropylene glycol block copolymer A pressure-sensitive correction tape comprising 1 to 10% by weight of at least one kind.