KR102107683B1 - Cloth Tape with Improved Release from Substrate Surface - Google Patents

Abstract

The present invention relates to a masking tape that adheres to an adherend for a long time and is exposed to a poor environment, and is completely used and peels off the tape when the tape is peeled off. In the masking tape comprising a layer, it provides a masking tape that is easy to peel from the adherend, characterized in that the layer laminated on the opposite side of the adhesive layer around the cotton cloth or the cotton cloth is black.

Description

Masking tape that does not leave adhesive residue when peeling off the adherend {Cloth Tape with Improved Release from Substrate Surface}

The present invention relates to a masking tape that adheres to an adherend for a long time and is exposed to a poor environment, and is used, and when the tape is peeled off, there is no adhesive residue left on the adherend and peels off cleanly.

In general, cloth tape (cloth tape, cloth adhesive tape, fabric tape) is easy to obtain and can be easily cut by hand, and thus is widely used in daily life or in industrial sites.

Such a cloth tape is usually a tape in which a release layer, a cotton cloth, and an adhesive layer are sequentially stacked, and a photograph of several examples is shown in FIG. 1 and a cross section of the cloth tape having the simplest structure is shown in FIG. 2. As a release agent constituting the release layer, a plastic resin is mainly used. For example, various resin mixes using polyethylene alone or polyethylene as a main material are used. As a cotton fabric, a single or several kinds of natural or man-made fibers are used, and both woven and non-woven fabrics can be used. As a pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer, a rubber-based pressure-sensitive adhesive of a solvent-free type in which a tackifier (petroleum resin, polybutene), other fillers (calcium carbonate) and a stabilizer are mixed in a predetermined ratio may be used in natural or synthetic rubber. The type of the cloth tape varies greatly depending on the components of the constituent materials (release agent, cotton cloth, and adhesive) constituting each layer, but the detailed description is omitted because the present invention is not related to the material or the type of the constituent material itself.

Each layer of cloth tape functions as follows. The release layer serves to protect the tape as an exposed surface when used, and is used to wind and unwind the cloth tape, so that the adhesive layer falls well off the release layer when the wound cloth tape is removed. Only one side of the cotton fabric (the other side of the release layer) is bound to remain. The cotton cloth maintains the strength and shape of the cloth tape, and allows the cloth tape to tear well. The adhesive layer imparts adhesive force to the cloth tape so that the tape is adhered to the release layer and the adherend and is easy to peel.

On the other hand, cloth tapes are used to paint a variety of color combinations and designs in terms of function and design, especially in industrial sites, such as automobiles, buses, vehicles, ships, or parts of steel sheets in industrial sites such as shipyards. When sandblasting, it is used in large quantities as a masking tape to protect and block adjacent parts that are not painted or sandblasted.

As a performance required in such a masking tape, it should have a physical strength suitable for the application, adheres well to the surface of a complex object having a complicated shape, is heat-treated after painting, or is exposed to the outside for a long time and when the application is exhausted Some may be easily peeled from the complex. In particular, the masking tape is subjected to a poor environment (high temperature conditions, long-term external exposure, etc.) after being applied to the adherend, and when it is denatured and there is a change in adhesive strength, when the tape is removed, the adhesive residue adheres to the adherend. When the peeling property is deteriorated in this way, the surface of the adherend becomes dirty, a work for removing the residue is required, and the surface of the adherend may be damaged during the removal process. For example, when the area of the deposit is large, such as a ship, it takes a lot of time and money to remove the residue, and when the deposit is a wall painted with paint or the like, the quality of the deposit may deteriorate.

Patent No. 10-0476797 (Painting masking tape base material and coating masking tape) is made of a resin of a specific material and modified on both sides by corona treatment, etc. Is presenting. However, this requires a complex process that requires the use of a resin of a specific material and the modification of both sides of the film.

Patent Publication No. 10-2011-0006790 (high heat resistant masking tape) relates to a masking tape having a crosslinking density, adhesive strength, tensile strength, heat resistance and pressure resistance, which has a structure including a release layer, an adhesive layer, a reinforcement layer, and a heat resistant layer, but is adhered to. I am not interested in the problem of peeling with cotton.

Patent Publication No. 10-2016-0134352 (masking tape having improved releasability with an adherend) has a binding layer added between the cotton fabric and the adhesive layer, wherein the binding force between the cotton fabric and the binding layer is greater than that of the binding layer and the adhesive layer. Although it relates to a fabric tape having improved mold release properties, it has the inconvenience of adding another lamination process in the tape manufacturing process.

Patent Registration 10-0476797 Patent Publication 10-2011-0006790 Patent Publication 10-2016-0134352

The present invention maintains the inherent properties of the cloth tape without the complicated changes such as the addition of the constituent layer constituting the tape or the compositional change of the constituent layer or the modification of the film surface, while leaving no residue when peeling off the adherend after use. It is an object to provide a masking tape which is easy to use.

The present invention for achieving the above object is
Composed of a cotton fabric, a release layer and an adhesive layer laminated on both sides of the cotton fabric, and in the masking tape attached to the adherend and peeled off the adherend after a predetermined time elapses,
The cotton fabric is dyed with a black pigment, and when the tape is used, the release layer exposed to the outside contains 4 to 7% of a black pigment, so that the adhesive residue adheres to the adherend when it is peeled off from the adherend. Provides masking tape that does not remain on the surface.

According to the present invention as described above, the masking tape can be separated without residue when it is removed from the adherend, even though it does not place a special differential element on the manufacturing process or on the material and there is no change in essential properties.

1 is a photograph of some examples of commonly used cloth tapes.
2 is an example of a cross-sectional view of a typical cloth tape.
3 to 9 are photographs showing test results of Examples and Comparative Examples according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. However, the attached drawings are merely examples for easily explaining the contents and scope of the technical spirit of the present invention, and the technical scope of the present invention is not limited or changed by the drawings. It will be obvious to those skilled in the art that various modifications and changes are possible within the scope of the technical spirit of the present invention based on these examples.

The present invention is composed of a cotton fabric, a release layer and an adhesive layer laminated on both sides of the cotton fabric, and in the masking tape attached to the adherend and peeling off the adherend after a certain time has elapsed, the cotton fabric is dyed with a black pigment. When the tape is used, the release layer exposed to the outside contains 4 to 7% of black pigment, so that the adhesive residue does not remain on the adherend when attached to the adherend and then peeled off from the adherend. It's about tape.

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In the present invention, the main material of the release layer is preferably a polyethylene resin.

In the present invention, the method of coating the release layer and the adhesive layer on the basis of the cotton cloth may appropriately select various conventionally known ones. An example of the manufacturing process of the masking tape according to the present invention may be made of the following steps. That is, 1) forming a release layer by coating a release agent component on one side of a pre-fabricated cotton fabric in a solvent-based or solvent-free manner--in this case, a plurality of layers may be stacked to form a release layer, 2) It consists of a step of forming a pressure-sensitive adhesive layer by coating the pressure-sensitive adhesive component in a solvent-based or solvent-free manner on the other surface of the cotton fabric on which the release layer is formed, 3) winding up, and 4) cutting. If necessary, a functional layer forming step having an appropriate function may be added before the release layer forming step or the adhesive layer forming step.

According to the present invention as described above, as described in the following examples, all other properties, i.e. material and composition, thickness of each layer, manufacturing process, etc. are the same, and only when the color of the cotton or release layer is different Compared to the masking tape to which color was applied, it exhibited excellent peelability with an adherend. Considering that the masking tape according to the embodiment has a sufficient thickness to prevent the transmission of sunlight, it is unclear what causes the effect of the present invention.

The present invention will be explained by the following examples.

[Example]

(1) Preparation of masking tape

In various materials such as polyester and cotton, various colored pigments (4 ~ 7%) are added to the polyethylene resin, which is a material of a common release layer, for cotton fabrics used in the production of cotton tapes, such as the thickness of cotton yarn and the number of cotton yarns per inch. Then, a release layer with color was created and applied. As in the case of an ordinary adhesive, polybutene, various resins, and fillers are added together with natural rubber and recycled rubber, and mixed with rubber aging agents so as not to deteriorate the performance of the rubber, and then the adhesive layer is laminated by a conventional method.

As an example, a black pigment was applied, and a masking tape to which pink, yellow, purple and red pigments were respectively applied was prepared according to a conventional method.

Each layer of the masking tape had a thickness of 180 to 190 µm for the cotton fabric, a thickness of 100 to 110 µm for the release layer, and a thickness of 90 to 100 µm for the adhesive, so that the total thickness was 300 µm. Since the release layer permeates between the cotton fabrics, the final thickness is smaller than the sum of the thicknesses of each layer.

(2) Peelability test with adherend

The prepared masking tape was attached to the surface of a clean SUS steel sheet side by side and was left outside to test the peelability when a predetermined date elapsed, and as a result, the photos were attached to FIGS. 3 to 9, respectively.

As can be seen in the photo, on the third day of exposure, both the Examples and Comparative Examples had excellent peelability (FIG. 4), but on the seventh day, the peelability of the purple tape was very poor (red arrow in FIG. 5). Subsequently, after 10 days of exposure, the red tape (red arrow in FIG. 6), and when 22 days elapsed, the peelability of pink (red arrow in FIG. 7) deteriorated.

However, in the case of the embodiment (black tape), as can be seen in the photo (FIG. 8) and the partially enlarged photo (blue arrow in FIG. 9), even after 28 days, the adhesive layer component is peeled off very neatly to the adherend (SUS surface). It can be seen that there is no remaining. Although the yellow tape in FIG. 8 and FIG. 9 appear to have good peelability, as shown by the red line and arrow in FIG. 9, a uniform adhesive layer remains on the surface of the adherend in the area where the tape is attached.

According to the present invention as described above, it is possible to manufacture a masking tape having excellent peelability with an adherend by a simple method that does not change the manufacturing process and does not increase the cost.

Claims (4)

Composed of a cotton fabric, a release layer and an adhesive layer laminated on both sides of the cotton fabric, and in the masking tape attached to the adherend and peeled off the adherend after a predetermined time elapses,
The cotton fabric is dyed with a black pigment, and when the tape is used, the release layer exposed to the outside contains 4 to 7% of the black pigment,
A masking tape characterized in that the adhesive residue does not remain on the adherend when it adheres to the adherend and then peels off the adherend.
delete delete The method according to claim 1,
The release layer is a masking tape characterized in that the polyethylene resin as a main material.

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