JP2003081535A - Paper core for pressure sensitive adhesive film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper core for a pressure sensitive adhesive film allowing to full use of the pressure sensitive adhesive film wound around the paper core for the pressure sensitive adhesive film to the last and easily recyclable as a paper resource after using it. SOLUTION: This paper core 1 for a pressure sensitive adhesive film is formed by winding a half glossed craft paper 3 as a face paper on a paper cylindrical base material formed of six layers of paper tube raw paper 2. A fluorine-based water repellent and oil repellent agents is adhered to the half glossed craft paper 3 at a degree to leave a clearance formed by entanglement of the paper fiber of the half glossed craft paper 3 (a surface of the face paper).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive film or a paper core for processing the adhesive film into a tape and winding the tape, storing the wound adhesive film, or transporting the adhesive film. In this specification, the film is not limited to a plastic film, but refers to a plastic film, paper, cloth, metal foil, or a composite product thereof, which is a thin sheet.

[0002]

2. Description of the Related Art Conventionally, an adhesive film is wound around a plastic paper core or a paper core, stored and transported. In particular, a paper core obtained by only winding a plurality of layers of tape-shaped paper in a spiral shape or simply winding the paper flat is inexpensive, and thus occupies a large part in the market of the adhesive film paper core.

[0003] For example, one of the methods for producing a consumer adhesive film having a narrow width is to wind a plastic film with an adhesive on a core of a pressure-sensitive adhesive film and then slit it while rewinding it on another core of the paper. There is a method of adjusting the width of the adhesive film for consumers. In this case, when the plastic film with adhesive is peeled off from the adhesive film paper core at the end of rewinding, the paper itself on the surface of the adhesive film paper core causes peeling and destruction, and a part of the paper is plastic. The phenomenon of reaching the film side occurs. Since the paper sticks to the adhesive of the plastic film, it is not possible to utilize the part where the paper is stuck, and to separate the part where the paper is stuck and the part where the paper is not stuck so that the part where the paper is not stuck can be used. Therefore, the manufacturing efficiency is reduced. For winding up the plastic film coated with the adhesive, for example, an adhesive film paper core having a thickness of about 3 mm, an inner diameter of about 75 mm and a length of about 1 m is used.
After use, the paper core of the adhesive film and the adhesive film are separated and reused as paper resources and plastic resources, respectively. Also, regarding the paper core that is adjusted to an appropriate width and sold to consumers, the part that sticks to the paper core at the end is peeled and destroyed when peeling from the paper core. There is something that turns over with.

As described above, the conventional adhesive film paper core has a structure in which the tape-shaped paper is overlapped and the paper is exposed on the surface. Therefore, a part of the paper on the surface of the adhesive film is exposed. Due to the adhesion, there is a problem that the adhesive film cannot be used up to the end. In order to solve this problem, conventionally, a continuous plastic layer is formed on the surface of the paper core. However, if the plastic layer is formed on the surface of the adhesive film paper core, it becomes difficult to utilize the adhesive film paper core as a paper resource. Further, in order to make the adhesive film easy to use until the end, if the adhesive force between the adhesive film paper core and the adhesive film is too small, the adhesive film may be displaced from the adhesive film paper core due to vibration or acceleration during transportation. The problem occurs.

The present invention has been made in order to solve the above-mentioned problems, and makes it possible to use the adhesive film wound around the core of the adhesive film paper to the end, and to reuse it as a paper resource after use. An object is to provide an adhesive film paper core that is easy to utilize.

The adhesive film paper core according to the first invention is an adhesive film paper core for winding up an adhesive film obtained by applying an adhesive to a film-shaped substrate, Of the tubular base material and a surface paper wound around the surface of the tubular base material, and the fluorine-based water and oil repellent agent is used to the extent that a gap formed by the entanglement of paper fibers on the surface of the surface paper is left. It is attached to the surface of the surface paper. In this case, when the adhesive film wound around the adhesive film paper core is peeled off, the fluorine-based water and oil repellent should prevent the surface paper itself of the paper core from peeling and breaking and the fibers of the paper sticking to the adhesive film. It is possible to prevent the decrease of the adhesive strength of the adhesive film which is re-adhered after being peeled off by the fluorine-based water- and oil-repellent agent, and it is possible to use the adhesive film adhered to the paper core. To be Further, the gap formed by the entanglement of the paper fibers has an effect that it becomes easy to secure an appropriate adhesive force between the adhesive film and the adhesive film paper core. Furthermore, since the amount of the fluorine-based water and oil repellent attached is extremely small and the tubular base material and the surface paper are made of paper, the adhesive film paper core can be reused as a paper resource. A pressure-sensitive adhesive film paper core according to a second invention is the pressure-sensitive adhesive film paper core according to the first invention, in which the fluorine-based water and oil repellent agent imparts water and oil repellency by forming a perfluoroalkyl group on the surface paper surface. It is a thing. In this case, the perfluoroalkyl group has a large effect of repelling the adhesive, and since the coating amount of the fluorine-based water and oil repellent can be suppressed to a further small amount, the gap formed by the entanglement of the paper fibers can be kept relatively large. There is an effect that a large adhesive force is easily obtained.

The adhesive film paper core according to the third invention is
In the adhesive film paper core of the first or second invention,
The adhesive is an acrylic adhesive. In this case, since it is a combination of a fluorine-based water and oil repellent and an acrylic adhesive, it is easy to maintain the balance between the adhesive strength required for winding and the adhesive strength for peeling off the adhesive film without sticking the paper. effective. A paper core according to a fourth aspect of the present invention is the paper core according to the third aspect, wherein the front surface paper is single-sided kraft paper. In this case, since the surface roughness of the single gloss kraft paper is small, there is an effect that the action of the fluorine-based water and oil repellent can be optimized with a small coating amount.

DETAILED DESCRIPTION OF THE INVENTION

(Embodiment) FIG. 1 is a perspective view schematically showing an example of the structure of an adhesive film paper core. Also,
FIG. 2 is a partially enlarged view in which the portion indicated by the symbol X in FIG. 1 is enlarged. As shown in FIGS. 1 and 2, the adhesive film paper core 1
Is a spirally wound plural tape-shaped paper base paper 2 and is laminated to form a paper-made tubular base material. Further, a piece of glossy kraft paper 3 is spirally wound as a surface paper on the outside of the paper core paper 2. As the paper tube base paper 2, for example, six layers having a thickness of 0.5 mm are used. In the pressure-sensitive adhesive film paper core of FIG. 1, for example, several tens g / g of the single gloss kraft paper 3 around which the plastic film coated with the pressure-sensitive adhesive is wound.
m ² is used.

Next, the fluorine-based water and oil repellent agent is applied to the one-side glossy kraft paper 3 with a sponge-like application roller. The fluorine-based water and oil repellent is applied by using a water-soluble emulsion type having a content of the fluorine-based water and oil repellent of several to several tens%. At this time, the weight change of the adhesive film paper core 1 after drying is preferably about 1 to 10 g / m ² with respect to the area of the paper core surface.

After coating, the coating is dried and the fluorine-based water and oil repellent is baked. Drying / baking is performed by placing in an atmosphere of about 120 ° C. for several tens of seconds to several minutes.
For baking, it is preferable to use an infrared lamp or a hot air blower as an auxiliary. By performing the baking, the perfluoroalkyl group of the fluorine-based water and oil repellent agent is arranged on the outer side opposite to the one-sided glossy kraft paper 3, and the main chain of the fluorine-based water and oil repellent agent is arranged on the paper side. The effects of the present invention are sufficiently exerted. The conditions for baking the fluorine-based water and oil repellent are in accordance with the handling method described in the instruction manual of a general commercially available fluorine-based water and oil repellent. In addition, when baking is not performed and drying is performed at room temperature, the adhesive force between the adhesive film and the adhesive film paper core becomes too large, and the paper itself tends to peel and break.

The adhesive film paper core of the above embodiment is
It is effective for those using an acrylic adhesive as the adhesive of the adhesive film. When a plastic film coated with an acrylic pressure-sensitive adhesive is wound around the pressure-sensitive adhesive film paper core according to the embodiment of the present invention, the pressure-sensitive adhesive-attached plastic film wound to be rewound on another paper core is peeled off. It is also possible to prevent peeling and breaking of the single gloss craft itself which is the surface paper of the adhesive film paper core. That is, the peelability is good. Further, the adhesive force when the adhesive film peeled from the adhesive film paper core according to the present embodiment is re-adhered to the paper, the adhesive film paper core has a lower rate of decrease than before being adhered to the adhesive film paper core. It can be reused as an adhesive film as before. That is, the readhesion property is good. Also, when observed under a microscope, there are gaps formed by the entanglement of paper fibers, and when the adhesive-coated plastic film is wound up, the adhesive-adhesive plastic film adheres to the paper core with sufficient strength. There is no problem that the paper sticks out of the core of the adhesive film and cannot be rolled. That is, the winding property is good. The fact that there is a gap here can be explained also because the water permeability of the single-glossy kraft paper is very high. Furthermore, since the amount of the water / oil repellent agent attached to the core of the pressure-sensitive adhesive film paper according to the present embodiment is extremely small, it can be defibrated as it is and recycled as paper. That is, the recyclability is good. In the above embodiment, a single glossy kraft paper that has not been printed is used, but if the printing is such that the gap formed by the entanglement of the paper fibers of the surface paper such as the single glossy kraft paper is not filled, The same effect as that of the above embodiment is obtained. Further, the one-sided glossy kraft paper contains a resin for glossing, but even a paper containing a small amount of resin in this way exhibits the above effect if there is a gap between the paper fibers.

(Example) A paper tube in which one-sided glossy kraft paper is wound on the surface of the above-mentioned 6-layer paper tube base paper is used, and a fluorine-based water / oil repellent agent is applied to the surface of the paper tube, thereby realizing Such an adhesive film paper core was prepared. The fluorine-based water and oil repellent has the property of a water-soluble emulsion, and the solid content is adjusted to 5%. Apply this fluorine-based water and oil repellent with a coating roller and apply 1.25 g on the surface of the paper tube.
/ M ^{2 was} attached. The baking condition is about 120 ° C. for about 1 minute. Masklight (registered trademark) tape # 730 manufactured by Sekisui Chemical Co., Ltd. was used as the adhesive film. In this case, the releasability, re-adhesiveness, winding property and recyclability were all good.

In order to evaluate the above-mentioned condition, a piece of glossy kraft paper was wrapped around a cylinder having an outer diameter similar to that of the paper tube, and a fluorine-based water and oil repellent agent was applied and baked in the same manner as in Examples. A piece of glossy kraft paper was cut into a width of 25 mm and a paper core paper having a thickness of 0.5 mm was attached to the back. A mask light (registered trademark) tape # 730 having the same width was pressed against a 25 mm width single-sided glossy kraft paper at a pressure of 20 kg / cm ² for 1 minute and then left to stand for 24 hours for adhesion. The conditions of standing were a temperature of 23 ° C. and a relative humidity of 50 to 60%. As to the sample prepared in this manner, as shown in FIG. 3, one side of the adhesive film 4 was attached to one side glossy kraft paper 5 lined with a paper tube base paper having a thickness of 0.5 mm on the back side, and the paper 6 was attached to the other side. The test was carried out by sticking and peeling 180 degrees. As a result, adhesive strength (adhesive strength)
Was 2.0 (N / 25 mm). Pulling speed is 1
000 mm / min, the pulling distance is 140 mm, and the measurement results are 20, 40, 60, 8 as shown in the graph of FIG.
It is the average value of the adhesive strength at 0,100 mm. The temperature during the test was 23 ° C. and the relative humidity was 50 to 60%. On the other hand, as a result of performing the same test on the product not coated with the fluorine-based water and oil repellent, the adhesive strength was 7.5 (N / 25
mm), and one-side glossy kraft paper was peeled and destroyed.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an example of the configuration of an adhesive film paper core.

FIG. 2 is a partially enlarged view in which a portion indicated by a symbol X in FIG. 1 is enlarged.

FIG. 3 is a perspective view schematically showing a 180-degree peeling method.

FIG. 4 is a graph for explaining the result of the peeling method.

[Explanation of symbols]

1 Adhesive film paper core, 2 paper core paper, 3,5 piece glossy craft paper, 4 adhesive film.

Claims (4)

[Claims] 1. A pressure-sensitive adhesive film paper core for winding a pressure-sensitive adhesive film comprising a film-shaped substrate coated with a pressure-sensitive adhesive, and a tubular substrate made of paper, and a surface paper wound on the surface of the tubular substrate. And a fluorine-based water and oil repellent agent attached to the surface of the surface paper to the extent that a gap formed by the entanglement of paper fibers on the surface of the surface paper is left. . 2. The paper-made pressure-sensitive adhesive film according to claim 1, wherein the fluorine-based water and oil repellent agent forms a perfluoroalkyl group on the surface of the surface paper to impart water and oil repellency. Winding core. 3. The pressure sensitive adhesive film paper core according to claim 1, wherein the pressure sensitive adhesive is an acrylic pressure sensitive adhesive. 4. The adhesive film paper core according to claim 3, wherein the front surface paper is a single-sided glossy kraft paper.