WO2014021161A1

WO2014021161A1 - Tape for forming double eyelid

Info

Publication number: WO2014021161A1
Application number: PCT/JP2013/070033
Authority: WO
Inventors: 小林　正則
Original assignee: ワールドワイドパートナーズリミテッド
Priority date: 2012-08-01
Filing date: 2013-07-24
Publication date: 2014-02-06
Also published as: TW201408339A; CN103717110A; CN103717110B; JP2014030503A; JP5329704B1

Abstract

[Problem] To provide a tape for forming a double eyelid that is moderately hard to rip, that is comfortable to wear, and that possesses adequate adhesive strength. [Solution] A tape for forming a double eyelid that comprises a substrate having an acrylic adhesive layer on both sides thereof, and that is characterized by: said substrate being polyethylene; the thickness of the substrate being 0.05-0.1 mm; the acrylic adhesive layer comprising a rosin ester resin and a copolymer of isooctyl (meth)acrylate and (meth)acrylic acid in which the monomer ratio of (meth)acrylic acid and isooctyl (meth)acrylate (the molar ratio of isooctyl (meth)acrylate:(meth)acrylic acid) is 85:15-99:1; and by the thickness of the acrylic adhesive layer being 0.01-0.04 mm.

Description

Double wrinkle forming tape

The present invention relates to a double wrinkle forming tape.

The conventional method for forming artificial double wrinkles is a technique for forming double wrinkles by applying glue-like liquid to the wrinkles, and by sticking the skin of the wrinkles together and drying them to create artificial folds. However, the method using paste-like liquid has problems such as the skin of the eyelids being scratched, and because fine work is performed near the eyes, it is necessary to get used to forming a clean double eyelid. .

Therefore, the invention according to Patent Document 1 provides a double wrinkle forming tape or thread in which an adhesive component is applied to a thin tape-shaped member that is stretchable and formed of a synthetic resin that is elastic and stretchable even after stretching. ing. According to the present invention, it is possible to form a double wrinkle cleanly and easily without causing the skin to become tangled.

Japanese Patent No. 3277180

However, the double wrinkle forming tape described in Patent Document 1 is easy to cut, does not have a good wearing feeling, and has insufficient adhesive strength. More specifically, if the double wrinkle forming tape is easily cut, the biting force is weak when it is bitten into the wrinkle, and as a result, a problem arises that it is difficult to make a deep and sharp double wrinkle. Moreover, since the wearing feeling is not always good (due to a sense of incongruity), there are many users who feel uncomfortable. In addition, since the adhesive strength is insufficient, it is weak against sebum, sweat and tears, and the duration is shortened. Then, an object of this invention is to provide the double wrinkle formation tape which is hard to cut moderately, has a favorable mounting feeling, and has sufficient adhesive force.

As a result of earnest research, the present inventor added polyethylene as a main component as a base material, and added as a main component a polymer obtained by copolymerizing specific types of monomers at a specific ratio as a pressure-sensitive adhesive composition. Is added as a tackifying resin, that is, by combining a specific base material and a specific pressure-sensitive adhesive composition (a specific type of polymer + a specific type of tackifying resin), it is proportional to the entire double wrinkle forming tape. The limit can be increased moderately, the adhesive strength can be increased moderately, and the adhesive layer can be made thinner by increasing the adhesive strength. ), And found that a good wearing feeling can be realized, and completed the present invention. Specifically, it is the following invention.

The present invention
In the double wrinkle forming tape having an acrylic adhesive layer on both sides of the substrate,
The substrate is polyethylene,
The thickness of the substrate is 0.05 to 0.1 mm,
The acrylic adhesive layer has a monomer ratio of isooctyl (meth) acrylate to (meth) acrylic acid {isooctyl (meth) acrylate: molar ratio of (meth) acrylic acid} is 85:15 to 99: 1. It contains a copolymer of isooctyl (meth) acrylate and (meth) acrylic acid and a rosin ester resin, and the acrylic adhesive layer has a thickness of 0.01 to 0.04 mm. It is the tape for double wrinkle formation characterized by these.
Here, the proportional limit of the double wrinkle forming tape as a whole is preferably 5 to 25 N / 25 mm.
The 180 ° direction peeling force of the acrylic pressure-sensitive adhesive layer is preferably 7.5 to 27 N / 25 mm.
Further, the acrylic pressure-sensitive adhesive layer preferably contains 50% by weight or more of a copolymer of isooctyl (meth) acrylate and (meth) acrylic acid based on the total weight of the acrylic pressure-sensitive adhesive layer. .

Here, the meaning of terms in the present specification and claims will be explained. “For double folds” includes not only the use of single folds as double folds, but also the use of deep double as double folds and the use of double folds as clearer double folds. “Dividing” includes not only cutting the connected objects, but also separating or separating the joined or adjacent objects. `` Easy separation processing '' is not particularly limited as long as the member is easily separated compared to the case where the easy separation processing is not performed when the same tensile force is applied to a certain member, For example, grooving, cutting, cutting line processing, and cutting can be mentioned.

According to the present invention, there is an effect that it is possible to provide a double wrinkle forming tape that is not easily cut off appropriately, has a good wearing feeling, and has sufficient adhesive force.

It is a conceptual side view of the double wrinkle forming tape which concerns on one form of this invention. It is a conceptual side view of the double-sided adhesive tape which concerns on one form of this invention. It is a conceptual diagram regarding the formation method of the double-sided adhesive tape area | region which concerns on embodiment of this invention. It is a conceptual diagram regarding the sticking method to the bag of the double-sided adhesive tape area | region which concerns on embodiment of this invention. It is a conceptual diagram regarding the sticking method to the bag of the double-sided adhesive tape area | region which concerns on embodiment of this invention. It is a schematic diagram (photograph) of measuring method 1 of the present invention. It is a conceptual diagram (photograph) which shows the effect by the surface processing of the adhesive surface protection sheet based on embodiment of this invention. It is a conceptual diagram regarding the flat pressure type punching which is a manufacturing method of the tape for double wrinkle formation based on embodiment of this invention. It is a measurement result of the DSC analysis regarding the base material of the double-sided adhesive tape based on the Example of this invention. It is a measurement result of the DSC analysis regarding the base material of the double-sided adhesive tape based on the Example of this invention. It is a measurement result of the DSC analysis regarding the base material of the double-sided adhesive tape based on the Example of this invention. It is a measurement result of the NMR analysis regarding the adhesion component based on embodiment of this invention. It is an analysis result of GPC analysis about an adhesion ingredient concerning an embodiment of the present invention. It is a measurement result of the NMR analysis regarding the adhesion component based on embodiment of this invention. It is a measurement result of the NMR analysis regarding the adhesion component based on embodiment of this invention. 2 is a deformation-load curve of a double-sided pressure-sensitive adhesive tape according to Example 1.

Hereinafter, the overall configuration of this embodiment will be described, and then each component will be described in order. However, the technical scope of the present invention is not limited to this form.

≪Overall structure≫
First, the overall configuration of the double fold forming tape according to this embodiment will be described with reference to FIGS. 1 and 2. The double wrinkle forming tape A according to the present embodiment protects the adhesive component of the double-sided pressure-sensitive adhesive tape 100 to which both sides of the adhesive component (adhesive component layer, adhesive layer) are applied, and the external adhesive, etc. It has the adhesive surface protection sheet 200 (210 and 220) applied to both surfaces of the double-sided adhesive tape 100, which becomes a gripping location (in use) together with the front. Hereinafter, each component will be described in detail.

<Double-sided adhesive tape>
{Double-sided adhesive tape / Overall configuration}
In FIG. 2, one form of the double-sided adhesive tape applicable in this form is shown. The double-sided pressure-sensitive adhesive tape 100 has a base material 120 as a core material, and

adhesive components

110a and 110b applied to the top and bottom surfaces of the base material 120, respectively. Hereinafter, the base material 120 and the pressure-sensitive adhesive layer 110 which are components of the double-sided pressure-sensitive adhesive tape 100 will be described in detail.

(Double-sided adhesive tape / component / base material)
-Material and physical properties The material of the base material 120 is preferably polyethylene. Here, as the polyethylene, high density polyethylene (density range: about 930 to 970 kg / m ³ ), medium density polyethylene (density range: about 930 to 970 kg / m ³ ), low density polyethylene (density range: 910 to 930 kg / m ³ ). m ³ ). Among these, when high-density polyethylene and medium-density polyethylene are used, a feeling of wearing is given to the feeling of wearing, whereas when low-density polyethylene is used, a very good fit is obtained. Therefore, among these polyethylenes, low density polyethylene is most suitable. Here, high-density polyethylene, medium-density polyethylene and linear (linear) low-density polyethylene can be obtained by polymerization at, for example, 50 to 250 ° C. and normal pressure to 20 MPa as is well known. The low density polyethylene can be obtained, for example, by polymerization at 150 to 350 ° C. and 100 to 350 MPa, as is well known. In addition, when the substrate is subjected to DSC analysis, the melting peak top temperature at the time of temperature rise is preferably 90 to 150 ° C., more preferably 95 to 145 ° C., and particularly preferably 100 to 140 ° C. It is. Further, the crystallization peak top temperature (main peak top temperature) at the time of temperature drop is preferably 80 to 140 ° C., more preferably 85 to 135 ° C., and particularly preferably 90 to 130 ° C. Furthermore, the melting peak top temperature at the time of reheating is preferably 90 to 150 ° C., more preferably 95 to 145 ° C., and particularly preferably 100 to 140 ° C. In addition, these peak top temperatures are measured by the method described in <Measurement method 1> described later.

<Measurement method 1>
The base material is placed in an aluminum container of about 2-3 mg, and DSC analysis is performed on the crimped one. The measurement conditions are: apparatus: TA Instrument Q-2000, measurement rate: 10 ° C./min, temperature program: −30 ° C. → 180 ° C. → −30 ° C. → 180 ° C., atmosphere: nitrogen gas (50 ml / min).

Structure The thickness of the base material 120 greatly affects the above-mentioned three properties. Therefore, the thickness of the base material of the double-sided pressure-sensitive adhesive tape is preferably 0.05 to 0.1 mm, more preferably 0.05 to 0.09 mm, and particularly preferably 0.07 to 0.00 mm. 08 mm.

(Double-sided adhesive tape / component / adhesive component)
-Material and physical properties The

adhesive components

110a and 110b preferably have the following three properties. The first point is a property required when a tensile force is applied to the substrate, assuming use (a double-sided adhesive tape region forming stage and a double-sided adhesive tape region will be described later). Specifically, it is necessary to have a viscoelasticity that follows the substrate when it is pulled and is appropriately stretched. The second point is to have a moderately enhanced tackiness. The third point is adhesion compatibility to the heel, and resistance to adhesion to oils and fats, sweat and tears (sustainability), assuming use (stage of application to the heel). As the material of the

adhesive components

110a and 110b having such properties, when the base material is polyethylene, an adhesive component containing an acrylic adhesive as a main component and a tackifier as the other component is suitable. is there. Among the acrylic pressure-sensitive adhesives, an acrylic pressure-sensitive adhesive that is an acrylic polymer having (meth) acrylic acid isooctyl or (meth) acrylic acid as a constituent monomer is preferable. Here, the molar ratio of isooctyl (meth) acrylate and (meth) acrylic acid, which are the main components of the monomer constituting the acrylic polymer {isooctyl (meth) acrylate: (meth) acrylic acid}, is preferably 85: 15 to 99: 1, more preferably 92.5: 7.5 to 99: 1, and even more preferably 95: 5 to 99: 1. The constituent ratio of the polymer in the constituent monomer of the acrylic polymer is analyzed according to <Measurement method 2> and <Measurement method 3> described later. Further, the acrylic polymer content in the adhesive component is preferably 50 to 90% by weight, more preferably 55 to 80% by weight, and further preferably 60 to 75% by weight. Here, the weight ratio of the acrylic polymer in the adhesive component to the other components including the tackifier is analyzed according to <Measurement Method 2> and <Measurement Method 4> described later. That is, the content ratio between the acrylic polymer in the adhesive component and the other components including the tackifier is analyzed from the methanol extraction amount of <Measurement method 2> and the GPC chromatogram of the soluble portion of the heated methanol. Although it does not specifically limit as components other than the acrylic polymer of an adhesion component, It is suitable to add the tackifier containing a rosin ester-type resin, and the component which has a para substituted benzene skeleton may be added. The content of the rosin ester resin in the component other than the acrylic polymer of the adhesive component is preferably 50 to 100% by weight, more preferably 60 to 100% by weight, and further preferably 80 to 100% by weight. Further, the 180 degree direction peeling force is preferably 7.5 to 27 N / 25 mm, more preferably 9.0 to 22 N / 25 mm, and further preferably 10.5 to 17 N / cm. Here, the said numerical value is a measured value in a stainless steel plate (SUS 304 BA) thickness 25 μm PET film backing, pressure bonding 2 kg roller, 1 reciprocation, curing at room temperature for 20 minutes, and tensile speed of 300 mm / min (average of 10 times).

<Measurement method 2>
A beaker into which 30 ml of methanol and 0.102 g of an adhesive component (adhesive layer) are injected is placed on a hot plate, the hot plate is set at 50 ° C., and heated for 30 minutes to perform extraction with methanol. Thereafter, methanol is separated into insoluble and soluble components, and each is weighed (average of 5 times).

<Measurement method 3>
< ¹³ > C NMR measurement is performed on the heated methanol-insoluble matter of <Measurement method 2>. Measurement conditions include: apparatus: Bruker Biospin AVANCE III-600 with Cryo Probe, observation frequency: 150 MHz, flip angle: 45 °, measurement solvent: CDCl ₃ (addition of several drops of pyridine-d ₅ ), chemical shift standard: measurement solvent ( CDCl ₃ ; 77.05 ppm). Detailed measurement conditions are listed in Table 1. In NMR measurement, a certain amount of component analysis can be performed by analyzing the entire adhesive component, but more detailed information can be obtained by analyzing the heated methanol insoluble matter.

<Measurement method 4>
An analysis using a GPC chromatogram is performed on the heated methanol-soluble component in <Measurement Method 2>. Adjust the heated methanol-soluble content to 1.0 g / l THF solution and let stand overnight. The solution is filtered through a 0.45 μm membrane filter and GPC measurement is performed. The measurement conditions were as follows: apparatus: TOSOH HLC-8120GPC, column: TSKgel SuperHZM-H / HZ4000 / HZ3000 / HZ2000, column size: 6.0 mm I.D. D. × 150 mm, eluent: THF, flow rate: 0.6 ml / min, detector: RI, column temperature: 40 ° C., injection volume: 20 μl. Detailed measurement conditions are shown in Table 2.

Structure The thickness of the adhesive component (adhesive component layer) greatly affects the above-mentioned three properties. Therefore, the thickness of the adhesive component is preferably 0.01 to 0.04 mm, more preferably 0.01 to 0.03 mm, and particularly preferably 0.01 to 0.025 mm.

{Double-sided adhesive tape / structure}
(Double-sided adhesive tape / total thickness)
The thickness of the double-sided pressure-sensitive adhesive tape greatly affects the above-mentioned three properties in combination with the base material and the pressure-sensitive adhesive component. Therefore, the thickness of the double-sided pressure-sensitive adhesive tape is preferably 0.09 to 0.20 mm, more preferably 0.10 to 0.18 mm, and particularly preferably 0.11 to 0.16 mm. .

(Double-sided adhesive tape / thickness ratio of base material and adhesive component layer)
The thickness ratio of the substrate / adhesive component layer (substrate thickness: total thickness of the adhesive component layer) is preferably 1.5: 1 to 3: 1, more preferably 1.75: 1. ˜2.5: 1, particularly preferably 1.85: 1 to 2.25: 1.

(Double-sided adhesive tape / width)
The width of the double-sided pressure-sensitive adhesive tape also greatly affects the above-mentioned three properties. In particular, if the width is too wide, it is difficult to apply the double wrinkle forming tape to the wrinkle. If the width is too narrow, the adhesive surface of the double wrinkle forming tape is not sufficiently secured. Therefore, the width of the double-sided pressure-sensitive adhesive tape is preferably 1.1 to 1.4 mm, more preferably 1.1 to 1.35 mm, and particularly preferably 1.1 to 1.3 mm.

(Double-sided adhesive tape / length)
If the length of the double-sided pressure-sensitive adhesive tape is too long, it will be difficult to affix the double wrinkle forming tape to the reed, and if it is too short, the width of the double reed formed by attaching the double wrinkle forming tape to the reed will be insufficient. Therefore, the length of the double-sided pressure-sensitive adhesive tape is preferably 25 to 30 mm, more preferably 26 to 29.5 mm, and particularly preferably 27 to 29 mm.

(Double-sided adhesive tape / thickness / width / length ratio)
Since the double fold forming tape is composed of only double-sided adhesive tape at the stage of use (during formation of double-sided adhesive tape region), depending on the ratio of thickness, width and length of double-sided adhesive tape, The shape is different. When the shape of the double-sided pressure-sensitive adhesive tape region does not have a shape suitable for placement on the ridge, sufficient double fold forming ability cannot be obtained. Therefore, the thickness / width ratio (thickness: width) of the double-sided pressure-sensitive adhesive tape is preferably 1: 8 to 1:12, more preferably 1: 8 to 1: 11.5. Particularly preferred is 1: 8 to 1:11. The width-length ratio (width: length) of the double-sided pressure-sensitive adhesive tape is preferably 1:20 to 1:30, more preferably 1:20 to 1:27. The ratio is preferably 1:20 to 1:25.

{Double-sided adhesive tape / physical properties}
The tape dimensional change characteristic after plastic deformation as a whole of the double-sided pressure-sensitive adhesive tape (after 60 seconds of load release) is preferably 110 to 150% and more preferably 115 to 145 when the deformation amount is 100%. %, More preferably 120 to 140%, and when the deformation amount is 150%, it is preferably 150 to 240%, more preferably 160 to 210%, and still more preferably 170. ~ 190%. Here, the numerical value is measured by the following method. In addition, the said value is an average value of 10 times.

<Measurement method 5>
First, a double-sided adhesive tape sample is cut into a width of 25 mm × 200 mm. At this time, the length direction of the tape is set to be the longitudinal direction of the test sample. Then, marked lines are drawn at intervals of 50 mm in the center of the sample (see FIG. 6). Fix to a constant speed tensile tester at intervals of 100 mm. Next, after applying deformation of 100% and 150% at a speed of 300 mm / min, the load is released and left in a free state for 60 seconds. Then, the distance between the marked lines is measured with a metal ruler at a timing of 3 degrees before tensioning, immediately after tensioning, and 60 seconds after load release, and recorded.

The proportional limit of the double-sided adhesive tape as a whole is preferably 5 to 25 N / 25 mm, more preferably 7.5 to 20 N / 25 mm, and further preferably 10 to 15 N / 25 mm. Here, the numerical value is measured by the following method. In addition, the said value is an average value of 10 times.

<Measurement method 6>
First, a sample having a width of 25 mm and a length of 150 mm is cut out and fixed to a constant speed tensile tester at intervals of 100 mm in the length direction. Thereafter, pulling is performed at a speed of 300 mm / min, and the deformation and load at that time are recorded. From the deformation-load curve, the maximum load in which the load and the strain are in a proportional relationship is set as the proportional limit.

<Adhesive surface protection sheet>
{Adhesive surface protective sheet / Structure}
(Adhesive surface protection sheet / structure / processing)
The pressure-sensitive adhesive surface protective sheet 200 protects the pressure-sensitive adhesive component of the double-sided pressure-sensitive adhesive tape, and also functions as a gripping portion when the double-sided pressure-sensitive adhesive tape region is applied to a bag. Accordingly, when the double-sided adhesive tape region is applied to a ridge, the adhesive surface protection sheet is divided without interruption and becomes a holding portion, so that the adhesive surface protection sheet 200 is grooved, cut, cut line processed, and cut. Easy separation processing may be provided. Here, the pressure-sensitive adhesive surface protective sheet 200 may be subjected to anti-slip processing such as concavo-convex processing on the outer surface (the surface not in contact with the double-sided pressure-sensitive adhesive tape). Furthermore, it is preferable that the inner surface of the pressure-sensitive adhesive surface protective sheet 200 (the surface that comes into contact with the double-sided pressure-sensitive adhesive tape) is subjected to a surface treatment that hardly interferes with the pressure-sensitive adhesive surface of the double-sided pressure-sensitive adhesive tape. The surface treatment applied to the surface of the pressure-sensitive adhesive surface protective sheet is not particularly limited, such as polishing, cutting, and surface coating, and examples thereof include mirror finishing. The inner surface of the pressure-sensitive adhesive surface protective sheet may have a rough surface such that it has a textured finish (fine irregularities) or has original fine irregularities. When a double-sided pressure-sensitive adhesive tape is applied to such a pressure-sensitive adhesive surface protective sheet, the pressure-sensitive adhesive component of the double-sided pressure-sensitive adhesive tape enters the concavo-convex portion and the like, and the pressure-sensitive adhesive surface protection sheet and the double-sided pressure-sensitive adhesive tape are in close contact with each other. Therefore, when the tape is stretched, the double-sided pressure-sensitive adhesive tape is rolled up to divide the pressure-sensitive adhesive surface protective sheet. As a result, a load is applied to the double-sided pressure-sensitive adhesive tape, the double-sided pressure-sensitive adhesive tape is broken, or the adhesive component is formed on the double-sided pressure-sensitive adhesive tape. See 7 (2). White dots surrounded by black circles indicate lumps of adhesive component}. On the other hand, by processing the inner surface of the adhesive surface protective sheet to be smooth, it is possible to stretch the double-sided adhesive tape without applying a load when the tape is stretched, thus preventing the double-sided adhesive tape from breaking. It becomes. Furthermore, since the adhesive component of the double-sided PSA sheet is kept in a uniform state, a double wrinkle forming tape with high adhesive strength and transparency can be realized {see FIG. 7 (1)}. Furthermore, a protective film for protecting the surface of the silicone rubber in the manufacturing process or the like may be disposed on the surface of the adhesive surface protective sheet. The said protective film acts suitably in order to inhibit the adhesiveness of the adhesive component of a double-sided adhesive tape and an adhesive surface protection sheet.

(Adhesive surface protection sheet / structure / thickness)
The adhesive surface protection sheet protects the adhesive component of the double-sided adhesive tape, and at the same time functions as a gripping point for the double wrinkle forming tape. Is desirable. Therefore, the thickness of the adhesive surface protective sheet is preferably 0.2 to 0.5 mm including the thickness of the film when the protective film is disposed on the surface of the adhesive surface protective sheet, and more preferably The thickness is 0.2 to 0.45 mm, and particularly preferably 0.2 to 0.4 mm. When a protective film is disposed on the surface of the pressure-sensitive adhesive protective sheet, the thickness of the protective film is preferably 0.01 to 0.1 mm, more preferably 0.025 to 0.085 mm. Particularly preferred is 0.04 to 0.07 mm.

(Adhesive surface protection sheet / structure / width)
As the width of the pressure-sensitive adhesive surface protective sheet, it is desirable to cover the double-sided pressure-sensitive adhesive tape 100 in a state before forming the double-sided pressure-sensitive adhesive tape region together with the width of the double-sided pressure-sensitive adhesive tape.

(Adhesive surface protection sheet / structure / length)
The length of the pressure-sensitive adhesive surface protective sheet is preferably an aspect that covers the double-sided pressure-sensitive adhesive tape 100 in the state before forming the double-sided pressure-sensitive adhesive tape region together with the shape of the double-sided pressure-sensitive adhesive tape.

{Adhesive surface protection sheet / material, physical properties}
The adhesive surface protection sheet protects the adhesive component of the double-sided adhesive tape and at the same time functions as a gripping point for the double fold-forming tape, so it does not interfere with the adhesive component of the double-sided adhesive tape and prevents external contamination as much as possible. Moreover, it is desirable that the material is easy to grip and not slip when picked with a finger. Therefore, as the material for the pressure-sensitive adhesive surface protective sheet, when an adhesive layer containing a rosin ester resin based on an acrylic resin is used, a silicone rubber having a hardness of 40 ° or more is suitable, and a hardness of 50 ° or more is preferable. Silicone rubber is preferable, and silicone rubber having a hardness of 60 ° or more is preferable. Here, the said hardness is the value measured with the durometer based on JISK6253. The upper limit is not particularly limited, but the hardness is 80 °. In the case where a protective film is provided on the surface of the adhesive surface protective sheet, the material of the surface protective film is not particularly limited, but is preferably a thermoplastic resin, more preferably a polyester, and particularly preferably a PET. It is a film.

≪Manufacturing method≫
Although the manufacturing method of the double fold forming tape A according to the present embodiment is not particularly limited, the respective sheet-like bodies are drawn and overlapped from the roll of the double-sided pressure-sensitive adhesive tape and the pressure-sensitive adhesive face protective sheet wound around the sheet-like body. Then, after forming the sheet-like laminate, it is preferable to form the sheet-like laminate to a desired size by punching (for example, flat-pressure three-head punching) (the concept of flat-pressure three-head punching is shown in FIG. 8). reference). According to the manufacturing method, since the tape is continuously formed, it is possible to stably form the double fold forming tape A without unevenness in adhesive force.

≪Usage (use) ≫
A method of using the double fold forming tape A on the ridge (sticking method) will be described in detail with reference to FIGS. As can be seen in FIG. 3, the adhesive surface

protective sheets

210 and 220 are picked and the entire double fold forming tape A is stretched left and right. At this time, the pressure-sensitive adhesive surface protective sheet is separated into gripping portions, and a portion consisting only of a double-sided pressure-sensitive adhesive tape, that is, a double-sided pressure-sensitive adhesive tape region 300, and gripping

portions

410 and 420 are formed. Next, as shown in FIG. 4, the double-sided pressure-sensitive adhesive tape region 300 is arranged and fixed at a double fold forming place, and then the gripping part is cut out as shown in FIG. 5.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The technical scope of the present invention is not limited to this embodiment.

<Conditions for implementation>
The basic configuration in this embodiment is as shown in FIGS.
First, a low density polyethylene having a thickness of 3 mil (about 0.076 mm) was used as the base material 120. As the physical properties of the base material in this example, thermal history at the time of temperature rise (FIG. 9), temperature drop (FIG. 10), and temperature rise (FIG. 11) is obtained by DSC analysis according to <Measurement Method 1>. It was. Table 3 summarizes the peak top temperature characteristics at the time of temperature rise, at the time of temperature fall, and at the time of temperature rise again. The adhesive component 110 includes an acrylic polymer having about 97 mol% of isooctyl acrylate and about 3 mol% of acrylic acid as a constituent monomer, and other components (a tackifier mainly composed of a rosin ester resin, para-substituted benzene). A pressure-sensitive adhesive (adhesive strength: 14.5) in which a weight ratio (acrylic polymer: other components) is approximately 63:37 in a composition obtained by adding a trace amount of an additive having a skeleton and another component. 7N / 25 mm) (applied to both sides of the substrate 120, the thickness of one side being 0.02 mm). Here, the measuring method and analysis result of the adhesive component component according to the present example will be described. First, the adhesive component is separated into an insoluble component and a soluble component by heating methanol extraction according to <Measurement Method 2> described above. Next, the constituent monomer composition ratio (composition ratio of isooctyl acrylate and acrylic acid) of the polymer can be analyzed by performing NMR spectrum analysis according to <Measurement Method 3> described above on the insoluble matter. Specifically, the composition ratio of acrylic acid and isooctyl acrylate is calculated by using the peak integrated intensity ratio of 177 ppm (acrylic acid) and 174 ppm (isooctyl acrylate) in the NMR spectrum according to <Measurement Method 3>. . The NMR spectrum analysis result according to <Measurement method 3> of the adhesive component in this example is shown in FIG. Next, a GPC chromatogram for the soluble component was prepared by the above-described <Measurement Method 4> (see FIG. 13). Specifically, the peak area ratio between peak 1 (polymer) and peak 2 (component having a tackifier + para-substituted benzene skeleton) in the GPC chromatogram of the heated methanol-soluble matter according to <Measurement Method 2> was calculated. . Further, Table 4 shows the results of collecting the weighing results of <Measurement Method 2> and the GPC chromatogram analysis results of <Measurement Method 4> of the adhesive component. From the above, it is possible to analyze the thermal history characteristics, the content ratio of the adhesive component, and the like of the base material according to this example.

In addition, the ¹³ CNMR analysis and the ¹ HNMR analysis were directly performed on the adhesive component as well as the insoluble component obtained by heating methanol extraction of the adhesive component according to <Measurement method 2>. The respective measurement results are shown in FIGS. The measurement conditions were as follows: apparatus: Bruker Biospin AVANCEIII-600 with Cryo Probe, observation frequency: ( ¹³ C; 150 MHz, ¹ H; 600 MHz, flip angle: 45 °, measurement solvent: CDCl ₃ (when pyridine-d5 was used during ¹³ C measurement) Addition of a few drops), chemical shift standard: measurement solvent (CDCl ₃ : ¹³ C; 77.05 ppm, ¹ H; 7.25 ppm) Detailed measurement conditions are shown in each figure.

Here, with respect to the base material 120 (double-sided pressure-sensitive adhesive tape 100 shown in FIG. 2) having the pressure-sensitive adhesive component 110 on both sides, the tape dimensional change characteristics after plastic deformation were tested based on the above-described <Measurement Method 5>. The results are shown in Table 3. Similarly, regarding the base material 120 having the adhesive component 110 on both sides, the proportional limit was measured based on <Measurement Method 6> described above. The result is shown in FIG. From FIG. 16, the proportional limit of the double-sided pressure-sensitive adhesive tape according to this example was about 12 N / 25 mm.

Next, on the adhesive component (layer) of the laminate (double-sided adhesive tape 100) in which the adhesive component (layer) 110 is applied to both surfaces of the substrate 120, a mirror surface is provided on the surface in contact with the adhesive component (layer). Adhesive surface protection sheets 210 and 220 (thickness: formed by providing PET films (thickness: 0.05 mm) on both sides of processed silicone rubber (thickness: 0.25 mm, hardness: 70 °) 0.35 mm) was affixed to obtain a laminate. Since the double-sided pressure-sensitive adhesive tape 100 and the pressure-sensitive adhesive surface

protective sheets

210 and 220 are sheet-like bodies drawn out from a roll-shaped raw fabric, the laminate is a plate having a continuous surface. Thereafter, as shown in FIG. 1, the laminate is cut with a flat pressure type three-head punching machine so that a portion subjected to easy separation processing is arranged at the approximate center of the side cross section, and the double wrinkle formation according to the present embodiment is formed. Tape A (width: 1.2 mm, length: 28 mm, thickness: 0.82 mm) was obtained.

A: Double wrinkle forming tape 100: Double-sided adhesive tape 110a to 110b: Adhesive component layer 120: Base material 210, 220: Adhesive surface protective sheet 300: Double-sided adhesive tape region 410, 420: Gripping part

Claims

In the double wrinkle forming tape having an acrylic adhesive layer on both sides of the substrate,
The substrate is polyethylene,
The thickness of the substrate is 0.05 to 0.1 mm,
The acrylic adhesive layer has a monomer ratio of isooctyl (meth) acrylate to (meth) acrylic acid {isooctyl (meth) acrylate: molar ratio of (meth) acrylic acid} is 85:15 to 99: 1. It contains a copolymer of isooctyl (meth) acrylate and (meth) acrylic acid and a rosin ester resin, and the acrylic adhesive layer has a thickness of 0.01 to 0.04 mm. A double wrinkle forming tape characterized by
The double wrinkle forming tape according to claim 1, wherein a proportional limit of the entire double wrinkle forming tape is 5 to 25 N / 25 mm.
The double wrinkle-forming tape according to claim 1 or 2, wherein the acrylic adhesive layer has a 180 ° peel strength of 7.5 to 27 N / 25 mm.