Self-adhesive adhesive tape roll

Abstract

To provide a self-adhesive adhesive tape roll body provided with high self-adhesive cohesiveness, low tackiness, and low insertion resistance.SOLUTION: A self-adhesive adhesive tape roll body obtained by winding an adhesive tape member having a tape-shaped substrate and an adhesive layer provided on one side of the tape-shaped substrate directly or via another layer in roll comprises a filler in the adhesive layer. With a total amount of the filler as a reference, the self-adhesive adhesive tape roll body has the filler having a particle diameter of 45 μm or more of 0.5 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a self-adhesive adhesive tape roll body. [Background technology]

[0002] Self-adhesive adhesive tape is an adhesive tape that has an adhesive layer and a base layer, similar to ordinary adhesive tape, and is an adhesive tape specialized for binding various items such as fresh vegetables, fresh flowers, documents, newspapers, magazines, etc. (e.g., Patent Document 1, etc.).

[0003] Self-adhesive adhesive tape is typically used as follows: The outer periphery of the object to be bound (item to be bound) is covered with the self-adhesive tape so that the self-adhesive surface (adhesive layer surface) of the self-adhesive tape faces the object to be bound, and then the self-adhesive surfaces of the adhesive tape are glued together to bind the object to be bound.

[0004] Self-adhesive adhesive tapes are required to have adhesive properties such as high adhesive strength (self-adhesion) between the adhesive surfaces and low tackiness in order to minimize the effects of glue residue on the objects being bound and to achieve sufficient binding properties.

[0005] Furthermore, self-adhesive adhesive tapes are usually sold as self-adhesive adhesive tape rolls formed by winding a long length of self-adhesive adhesive tape. Furthermore, dedicated tools for assisting the use of such self-adhesive adhesive tape rolls have also been studied (for example, Patent Document 2, etc.). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-161962 [Patent Document 2] Patent No. 6226880 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0007] For self-adhesive adhesive tapes, the required self-adhesive binding properties (self-adhesive strength and self-adhesive retention strength) vary depending on the type of object being bound, so in order to accommodate a variety of applications, it is necessary to achieve both lower tackiness and higher self-adhesive binding properties.

[0008] Furthermore, when using the device disclosed in Patent Document 2 and the like, it is required to reduce the resistance (insertion resistance) when inserting the device into the object to be bound.

[0009] Therefore, an object of the present invention is to provide a self-adhesive adhesive tape roll that combines high self-adhesive binding properties, low tack, and low insertion resistance. [Means for solving the problem]

[0010] As a result of extensive research, the present inventors have found that the above-mentioned problems can be solved by specifying particles contained in a self-adhesive adhesive tape.

[0011] The present invention provides A self-adhesive adhesive tape roll body obtained by winding an adhesive tape member having a tape-shaped substrate and an adhesive layer provided on one side of the tape-shaped substrate directly or via another layer, the pressure-sensitive adhesive layer contains a filler, Based on the total amount of the filler, the amount of filler with a particle size of 45 μm or more is 0.5 mass % or more The self-adhesive adhesive tape roll body is characterized by the above-mentioned. The average particle size of the filler is preferably 0.1 to 100 μm. The filler preferably includes silica particles and calcium carbonate particles. The coating amount of the pressure-sensitive adhesive layer is 25 to 35 g / m 2 It is preferable that: [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a self-adhesive pressure-sensitive adhesive tape roll that combines high self-adhesive binding properties, low tack, and low insertion resistance. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 shows a conceptual side view of a self-adhesive adhesive tape roll 100 according to this embodiment. [Figure 2] FIG. 2 shows a conceptual side view of the adhesive tape member 110 according to this embodiment. [Figure 3] FIG. 3 shows a conceptual diagram of the self-adhesion holding strength testing method according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention relates to a self-adhesive adhesive tape roll body in which a tape substrate is wound into a roll, and is particularly suitable for use as a tape roll body for attracting plants.

[0015] The following describes the configuration, manufacturing method, and uses of the self-adhesive adhesive tape roll 100 according to the present invention. In the following, when an upper limit and a lower limit are stated separately, it is assumed that any numerical range that can be freely combined between these values ​​is essentially stated.

[0016] <<<<<Self-adhesive adhesive tape roll 100>>>> The self-adhesive adhesive tape roll 100 is formed by winding an adhesive tape member 110 in a roll shape around a shaft core 120 (FIG. 1).

[0017] In the self-adhesive adhesive tape roll body 100, the roll diameter, the number of turns of the adhesive tape member 110, etc. can be changed as appropriate.

[0018] The material and shape of the core 120 are not particularly limited and can be changed as appropriate depending on the application of the self-adhesive adhesive tape roll 100. Furthermore, the self-adhesive adhesive tape roll 100 may be a roll that does not have a core 120 (a so-called coreless type).

[0019] The adhesive tape member 110 will be described in detail below.

[0020] <<<Adhesive tape member 110>>> The adhesive tape member 110 is a laminate having a tape substrate 111 and an adhesive layer 114 provided on one surface of the tape substrate 111 .

[0021] Furthermore, as shown in Fig. 2, another layer may be interposed between the tape substrate 111 and the adhesive layer 114. This other layer is preferably an ink layer 112 and a primer layer 113. More specifically, as shown in Fig. 2, the adhesive tape member 110 is preferably a laminate in which the tape substrate 111, the ink layer 112, the primer layer 113, and the adhesive layer 114 are laminated in this order.

[0022] <<Tape base material 111>> A conventionally known substrate used as a substrate for an adhesive tape member can be used as the tape substrate 111. The tape substrate 111 can be, for example, a film, a woven fabric, a nonwoven fabric, or the like.

[0023] Here, a fine uneven structure may be provided on the surface of the tape substrate 111 opposite to the surface on which the adhesive layer 114 is provided (tape substrate surface 111a in FIG. 2).

[0024] The self-adhesive adhesive tape roll 100 is wound so that the tape substrate surface 111a and the surface of the adhesive layer 114 (adhesive layer surface 114a) are in contact with each other. As a result, the fine uneven structure provided on the tape substrate surface 111a is transferred to the adhesive layer surface 114a. That is, the adhesive tape member 110 unwound from the self-adhesive adhesive tape roll 100 also has a similar fine uneven structure. By transferring a predetermined fine uneven structure to the adhesive layer surface 114a, the contact area of ​​the adhesive layer 114 having predetermined components with the adherend is reduced, realizing low tackiness. In addition, when the adhesive layers 114 are pressed together, the uneven structure is crushed, thereby demonstrating the strong adhesive strength (self-adhesion) inherent in the adhesive that forms the adhesive layer 114.

[0025] More specifically, the tape substrate surface 111a is provided with a fine uneven structure having a surface roughness based on JIS B 0601-2013 of 0.5 to 5.0 μm (or more than 0.5 and less than 5.0 μm) in arithmetic mean roughness (Ra). By setting the roughness of the fine uneven structure within this range, the effects of the present invention can be achieved. To further enhance the effects of the present invention, the surface roughness based on JIS B 0601-2013 is preferably 1.0 to 4.0 μm (or more than 1.0 μm and less than 4.0 μm) in arithmetic mean roughness (Ra). Furthermore, the surface roughness based on JIS B 0601-2013 is preferably 10 to 50 μm in ten-point mean roughness (Rz), and more preferably 20 to 40 μm in ten-point mean roughness (Rz). More specifically, this surface roughness can be measured by the following method. Using a Surfcoder ET4000A manufactured by Kosaka Laboratory, measure one side under the following conditions. Measuring force: 30μN X pitch: 4.00 μm Y pitch: 4 μm Z measurement magnification: 10000 X feed speed: 0.5 mm / sec Low frequency cut: 0.8mm High-frequency cut: R+W Leveling: Least Squares

[0026] The fine uneven structure can be formed by known processing methods, such as matte finish, sandblasting, and hairline finish, but it is preferable to form the fine uneven structure by matte finish, as this allows for the formation of a dense uneven structure.

[0027] The material of the tape substrate 111 is not particularly limited, but examples thereof include resin films formed from polyolefin resins, polyester resins, vinyl chloride resins, polyimide resins, etc., crepe paper, Japanese paper, nonwoven fabric, etc. These may be used alone or in combination of two or more types. The tape substrate 111 may also be a laminate made of multiple layers (for example, a composite substrate in which paper is laminated on a resin film). Furthermore, when the tape substrate 111 is a laminate made of multiple layers, a layer made of a pressure-sensitive adhesive or adhesive may be interposed between them.

[0028] The material of the tape substrate 111 is preferably a resin film.

[0029] The tape substrate 111 may contain a pro-oxidant.

[0030] The pro-oxidant may include at least one selected from unsaturated fatty acids, aliphatic monocarboxylic acids, and salts thereof.

[0031] In this way, since the tape substrate 111 contains an antioxidant, oxidation (deterioration) of the tape substrate 111 occurs when harvesting plants attracted by the adhesive tape member 110, and the tape substrate 111 can be easily cut by hand without using tools such as scissors.

[0032] The content of the pro-oxidant is preferably 0.03% by mass or more based on the total mass of the tape substrate, and the upper limit is not particularly limited, but is, for example, 1%, 2%, 3%, 4%, or 5% by mass.

[0033] Here, it is preferable that the content corresponds to the growth period of the plant. Specifically, it is preferable to add an amount of pro-oxidant that imparts to the tape substrate the following properties: (1) maintains sufficient strength to maintain the plant / pole fixation state after the plant is fixed to a support or the like with the tape until the plant is harvested, and (2) reduces the strength of the tape substrate to a level that allows it to be torn by hand at the time of harvest. For example, in the case of tomatoes, the growth period in outdoor cultivation is approximately 3 to 6 months. Therefore, it is preferable that the amount of pro-oxidant be such that the tomato stems are fixed to a support for approximately 3 months and the tape substrate has reduced its strength to a level that allows it to be torn after approximately 6 months.

[0034] The thickness of the tape substrate 111 is not particularly limited, but may be, for example, 50 to 100 μm, and preferably 60 to 80 μm.

[0035] The tape substrate 111 may have a backside treatment agent applied to the back side (tape substrate surface 111a) of the tape substrate 111. As such a backside treatment agent, a known, conventional agent can be used, and examples thereof include a long-chain alkyl-based backside treatment agent.

[0036] <<Ink layer 112>> The ink layer 112 is usually a layer formed by directly coloring (including printing, etc.) the surface of the tape substrate 111 (the surface of the tape substrate 111 on the adhesive layer 114 side), but it may also be formed from a film colored with a specified colorant.

[0037] <<Primer layer 113>> The primer layer 113 can be, for example, as described in WO 2014 / 126158.

[0038] <<Adhesive layer 114>> The adhesive layer 114 includes an elastomer component and a filler, and typically further includes a tackifying resin.

[0039] The adhesive layer 114 may contain other components as needed.

[0040] As the elastomer component, a styrene-based elastomer is preferably used. In the following, an embodiment in which the elastomer component is a styrene-based elastomer will be described, but the elastomer component may be composed of or contain an elastomer component other than a styrene-based elastomer.

[0041] Here, the adhesive layer 114 has a coating amount of adhesive (mass per unit area as solid content excluding volatile components) of 10 to 50 g / m 2 The thickness is preferably 15 to 45 g / m 2 It is more preferable that the thickness is 20 g / m 2 Super 40g / m 2 It is more preferable that the thickness is less than 25 to 35 g / m 2 By setting the coating amount of the adhesive layer 114 containing the filler described below in this range, the distribution of the filler in the thickness direction in the adhesive layer 114 becomes appropriate, and the effects of the present invention can be further enhanced.

[0042] <Styrene-based elastomer> The styrene-based elastomer is not particularly limited, and examples thereof include styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylenebutylene-styrene block copolymer (SEBS), styrene-ethylenepropylene-styrene block copolymer (SEPS), styrene-ethyleneethylenepropylene-styrene block copolymer (SEEPS), and styrene-butadiene-butene-styrene block copolymer (SBBS). These may also be partially modified. These may be used alone or in combination of two or more.

[0043] The styrene-based elastomer may be in any of a form containing only a high-styrene-containing elastomer having a styrene content of more than 20% by mass, a form containing only a low-styrene-containing elastomer having a styrene content of 20% by mass or less, or a form containing both a high-styrene-containing elastomer and a low-styrene-containing elastomer, but a form containing both a high-styrene-containing elastomer and a low-styrene-containing elastomer is preferred.

[0044] The styrene content of the high styrene-containing elastomer is preferably more than 20% by mass and not more than 40% by mass, and more preferably 20% to 30% by mass.

[0045] The styrene content of the low styrene content elastomer is preferably 12% by mass to 20% by mass, and more preferably 15% by mass to 18% by mass.

[0046] The ratio (El / Eh) of the content of the low styrene-containing elastomer (El) to the content of the high styrene-containing elastomer (Eh) in the pressure-sensitive adhesive layer 114 is preferably 2.0 or less, more preferably 1.5 or less, and particularly preferably 1.0 or less. The lower limit of El / Eh is not particularly limited, but can be, for example, 0.1, 0.2, 0.3, or 0.5.

[0047] The content of the styrene-based elastomer in the pressure-sensitive adhesive layer 114 is preferably 20 to 80 mass %, more preferably 30 to 70 mass %, and even more preferably 40 to 60 mass %.

[0048] <Filler> Examples of fillers include calcium carbonate, zinc oxide (zinc oxide), aluminum silicate, silica, talc, diatomaceous earth, silica sand, pumice powder, slate powder, mica powder, aluminum sol, alumina white, aluminum sulfate, barium sulfate, lithopone, calcium sulfate, molybdenum disulfide, graphite, glass fiber, glass spheres, single-crystal potassium titanate, carbon fiber, activated zinc oxide, zinc carbonate, magnesium oxide, basic magnesium carbonate, litharge, red lead, white lead, calcium hydroxide, activated calcium hydroxide, titanium oxide, graphite, etc. These may be used alone or in combination of two or more.

[0049] The filler preferably contains silica particles and / or calcium carbonate particles.

[0050] The total content of silica particles and calcium carbonate in the filler is preferably 50% by mass or more, more preferably 80% by mass or more, and particularly preferably 90% by mass or more.

[0051] The content ratio of silica particles to calcium carbonate particles (content of silica particles / content of calcium carbonate particles) is preferably 0.10 to 0.50, and more preferably 0.15 to 0.40.

[0052] Based on the total amount of filler, the proportion of filler having a particle size of 45 μm or more is preferably 0.5% by mass or more, more preferably 1.0% by mass or more. The upper limit of the proportion of filler having a particle size of 50 μm or more is not particularly limited, but is, for example, 25% by mass, 10% by mass, or 5% by mass.

[0053] The proportion of fillers with particle sizes of 150 μm or more is preferably 1% by mass or less, 0.1% by mass or less, or 0.01% by mass or less, based on the total amount of fillers, and more preferably 1% by mass or less, 0.1% by mass or less, or 0.01% by mass or less, based on the total amount of fillers.

[0054] The average particle size of the entire filler is preferably 0.1 μm or more, 1 μm or more, 2 μm or more, or 5 μm or more, and is preferably 100 μm or less, 50 μm or less, 40 μm or less, 30 μm or less, or 10 μm or less, where the average particle size is the median diameter (50% diameter) in the mass-based distribution.

[0055] Here, the filler contains calcium carbonate particles and silica particles, and the calcium carbonate particles have an average particle size of 1 to 10 μm, and the silica particles have an average particle size of more than 10 μm and 50 μm or less, which is most preferred.

[0056] By mixing a plurality of fillers with different average particle sizes, the particle size distribution of the filler can be adjusted.

[0057] To further enhance the effects of the present invention, the amount of filler in the adhesive layer 114 is preferably 5 to 30% by mass, more preferably 7 to 25% by mass, and particularly preferably 10 to 20% by mass.

[0058] By using such particles as fillers, the unevenness near the adhesive surface becomes more appropriate, which effectively contributes to reducing adhesion to the object being bound. Also, by adjusting the filler particle size distribution, it is possible to reduce the filler content compared to existing products, which is thought to make it possible to reduce insertion resistance without impairing self-adhesion.

[0059] <Tackifying resin> The tackifying resin is not particularly limited, and examples thereof include rosin-based resins, terpene-based resins, aliphatic petroleum resins, alicyclic saturated hydrocarbon resins, aromatic petroleum resins, coumarone-indene resins, styrene-based resins, phenol-based resins, xylene resins, etc. These may be used alone or in combination of two or more.

[0060] In order to enhance the effects of the present invention, the tackifier resin preferably contains one or more of an alicyclic saturated hydrocarbon resin, a terpene resin, and a styrene resin, more preferably contains two or more of these, and even more preferably contains all of these.

[0061] The softening point of the alicyclic saturated hydrocarbon resin is preferably 90 to 140°C, and more preferably 120 to 140°C.

[0062] The softening point of the terpene resin is preferably 80 to 130°C, and more preferably 110 to 120°C.

[0063] The softening point of the styrene resin is preferably 100 to 140°C, and more preferably 110 to 130°C.

[0064] The content of the alicyclic saturated hydrocarbon resin relative to the total tackifier resin is preferably 30 to 80 mass %, more preferably 35 to 70 mass %, and particularly preferably 40 to 60 mass %.

[0065] The content of the terpene resin relative to the total tackifier resin is preferably 10 to 50 mass %, more preferably 15 to 45 mass %, and particularly preferably 20 to 40 mass %.

[0066] The content of the styrene resin relative to the total tackifier resin is preferably 1 to 40 mass %, more preferably 5 to 30 mass %, and particularly preferably 10 to 25 mass %.

[0067] The content of the tackifier resin in the adhesive layer 114 is preferably 30 to 70% by mass, and more preferably 40 to 60% by mass.

[0068] <Other ingredients> Examples of other components include known additives such as antioxidants, colorants, softeners, plasticizers, ultraviolet absorbers, antioxidants, etc. Furthermore, other components may include adhesive components other than styrene-based elastomers (e.g., rubber-based adhesives other than styrene-based elastomers, acrylic-based adhesives, silicone-based adhesives, etc.).

[0069] (antioxidant) Examples of antioxidants include dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA), vitamin C (ascorbic acid), vitamin E (tocopherol), sodium erythorbate, propyl gallate, sodium sulfite, sulfur dioxide, etc. These may be used alone or in combination of two or more.

[0070] (coloring agent) The colorant may be either inorganic or organic, and may be added so as to achieve the desired color. These may be used alone or in combination of two or more.

[0071] (softener) Examples of the softener include petroleum-based softeners, plant-based softeners, liquid rubber, liquid tackifying resins, synthetic plasticizers, etc. These may be used alone or in combination of two or more.

[0072] (ultraviolet absorber) Examples of ultraviolet absorbers include salicylic acid derivatives, benzophenone compounds, benzotriazole compounds, cyanoacrylate compounds, etc. These may be used alone or in combination of two or more.

[0073] (anti-aging agent) Examples of antioxidants include naphthylamine compounds, diphenylamine compounds, p-phenylenediamine compounds, other amine compounds, amine compound mixtures, quinoline compounds, hydroquinone derivatives, monophenol compounds, bisphenol compounds, trisphenol compounds, polyphenol compounds, thiobisphenol compounds, etc. These may be used alone or in combination of two or more.

[0074] <<<Method for manufacturing a self-adhesive adhesive tape roll>>> There are no particular limitations on the method for manufacturing the self-adhesive adhesive tape roll 100, and it can be manufactured by a known method. An example of a method for manufacturing the self-adhesive adhesive tape roll 100 will be described below.

[0075] First, an adhesive liquid prepared by adding an organic solvent or the like to the raw material constituting the adhesive layer 114 as needed, and a tape substrate 111 having a fine uneven structure on at least one surface are prepared.

[0076] Next, a printing process and a primer process are sequentially carried out on the surface of the tape substrate 111 opposite to the surface on which the fine concave-convex structure is provided, to form an ink layer 112 and a primer layer 113 .

[0077] Next, an adhesive liquid is applied onto the primer layer 113 using an applicator or the like. Thereafter, drying is performed, for example, at 100°C for 3 minutes to obtain an adhesive tape member 110 in which an adhesive layer 114 is provided on the primer layer 113.

[0078] Finally, the adhesive tape member 110 is wound around the outer periphery of the core 120, thereby producing the self-adhesive adhesive tape roll 100.

[0079] <<<Uses of the self-adhesive adhesive tape roll 100>>> The self-adhesive adhesive tape roll 100 has low tackiness, high self-adhesive binding properties, and low unwindability, and can therefore be used for a variety of purposes. For example, it can be used as an adhesive tape for binding various items such as fresh vegetables, fresh flowers, documents, newspapers, magazines, etc. The adhesive can also be impregnated into a substrate such as cloth or sprayed onto both sides, dried, wound, and cut into a tape roll, which can then be used as an adhesive bandage, sports fixation tape, sports anti-slip tape, etc.

[0080] The self-adhesive adhesive tape roll 100 has low tackiness and does not inhibit the growth of vegetables, making it suitable for use as a vegetable guide. Furthermore, the self-adhesive adhesive tape roll 100 has high self-adhesive binding properties, making it suitable for use in bundling applications that require high loads. For example, among vegetable guides, the tape can be used to guide tomatoes, as well as cucumbers and grapes.

[0081] Furthermore, since the self-adhesive adhesive tape roll body 100 has low tack and low insertion resistance, it can be preferably used as a self-adhesive adhesive tape roll body to be set in a device specifically for self-adhesive adhesive tapes, as disclosed in Patent No. 6226880, etc. [Example]

[0082] The present invention will be described in more detail with reference to the following examples and comparative examples, but the present invention is not limited to the following.

[0083] <<Raw materials>> <Styrene-based elastomer> Low styrene SIS (styrene content: 16% by mass, Zeon Quintac 3433N) High styrene SBBS (styrene content: 25% by mass, Asahi Kasei Corporation, Asaprene ATN521) <Tackifying resin> Terpene resin (Yasuhara Chemical Co., Ltd.: YS Resin PX1150N) Alicyclic saturated hydrocarbon resin (Arakawa Chemical Industries, Ltd.: Alcon P140) Styrene resin (Mitsui Chemicals: FTR2120) <Filler> Calcium carbonate (average particle size 1.5 μm, Maruo Calcium Co., Ltd.: Super #1500) Silica particles 1 (average particle size 13-15 μm, manufactured by Tosoh Silica Corporation: NIPGEL BY-001) Silica particles 2 (average particle size 30-40 μm, manufactured by Tosoh Silica Corporation: Nipsil VN3 #100 ) <Other ingredients> Antioxidant (Seiko Chemical Co., Ltd.: Nonflex EBP)

[0084] <<Production of Adhesive Tape Rolls According to Examples and Comparative Examples>> A 70 μm thick CPP film was prepared, which had a fine uneven structure on one side (arithmetic mean roughness (Ra) 2.9 μm, ten-point mean roughness (Rz) 29.7 μm, matte surface). Next, an ink layer (colored layer) and a primer layer were sequentially formed on the surface of the CPP film opposite the surface having the micro-relief structure. The adhesive shown in each table was applied onto the primer layer in the amount shown in each table to produce an 11 mm wide adhesive tape. The film was wound up so that the matte surface of the film was in contact with the adhesive layer, to prepare an adhesive tape roll having a width of 11 mm according to each of the Examples and Comparative Examples.

[0085] In Example 1, the proportion of fillers with particle sizes of 45 μm or more based on the total amount of fillers was 1 mass %. In Examples 2, 4, and 5, the proportion of fillers with particle sizes of 45 μm or more was 2 mass % based on the total amount of fillers. In Example 3, the proportion of fillers with particle sizes of 45 μm or more based on the total amount of fillers was 3 mass %. In Comparative Example 1, the proportion of filler having a particle size of 45 μm or more based on the total amount of filler was 0 mass %. In Comparative Examples 2, 3, and 5 to 7, the proportion of fillers with particle sizes of 45 μm or more based on the total amount of fillers was 0.2 mass %. In Comparative Example 4, the proportion of filler having a particle size of 45 μm or more based on the total amount of filler was 0.3 mass %.

[0086] In Examples 1, 2, 4 and 5, the proportion of filler having a particle size of 100 μm or more was 0% by mass. In Example 3, the proportion of filler having a particle size of 100 μm or more was 0.1% by mass.

[0087] In Example 1, the median diameter (by mass) of the entire filler was 5 μm. In Examples 2, 4, and 5, the median diameter (by mass) of the entire filler was 6 μm. In Example 3, the median diameter (by mass) of the entire filler was 7 μm.

[0088] <<Evaluation>> The pressure-sensitive adhesive tape rolls according to the examples and comparative examples were evaluated for probe tack, self-adhesive strength, self-adhesive retention strength, and insertion resistance according to the following methods. The results of the evaluations are shown in the table below.

[0089] <Probe tack test> A probe tack test was carried out in accordance with ASTM D2979 under conditions of 23°C and 50% RH using the example tape (11 mm wide) as a test piece. Specifically, the test piece is attached to the weight ring without any slack, and a cylindrical probe with a diameter of 5 mm is inserted into the adhesive surface of the test piece at a pressure of 0.98 ± 0.001 N / cm 2 After applying a load of 10±0.1 mm / sec for 1.0±0.01 seconds, the force (N / 5mmφ) required to peel the probe perpendicularly from the adhesive surface at the same speed as the contact speed was measured.

[0090] <Self-adhesion test> The collected test piece (adhesive tape with a width of 11 mm) is stuck together with the adhesive side facing inward, taking care not to stretch the test piece or trap air bubbles. The stuck length should be 100 mm or more. Next, a 2 kg pressure roller is used to press the test piece back and forth at a pressing speed of approximately 300 mm per minute, and the test piece is left to stand for 20 to 40 minutes. Thereafter, the test piece was fixed to an Instron type tensile tester, and the test piece was peeled at a peel rate of 300 mm / min, and the resulting peel force (N / 11 mm) was measured.

[0091] <Self-adhesion retention test> The collected test piece (adhesive tape with a width of 11 mm) is stuck together with the adhesive side facing inward, taking care not to stretch the test piece or trap air bubbles. The stuck length should be 100 mm or more. Next, a 2 kg pressure roller is used to press the test piece back and forth at a pressing speed of approximately 300 mm per minute, and the test piece is left to stand for 20 to 40 minutes. Then, fix one end of the test piece and hang a weight on the other end as shown in Figure 3. Before hanging the weight, peel off about 5 mm of the bonded portion and mark the boundary with a marker or similar. After the specified time, with the weights still attached, the deviation distance (between the marks on the marker, etc.) is read with a vernier caliper.

[0092] <Insertion Resistor> The insertion resistance was measured under two conditions: low temperature and low humidity: 23°C and 50% RH, and high temperature and high humidity: 40°C and 75% RH. First, in accordance with the standard method of use of the Tometatsu (registered trademark) TMA100 induction binding machine (manufactured by Nichiban Co., Ltd.), the adhesive tape roll (width 11 mm) of each example and comparative example was set in the TMA100. At this time, the leading end of the adhesive tape pulled out from the adhesive tape roll was fixed to the end of the TMA100. Next, prepare a DSV-50N (manufactured by Imada Co., Ltd.) as a measuring device and set a T-shaped measuring part (an attachment connected to a 10 mm diameter steel pipe support). The adhesive tape fixed to the TMA100 is pressed against the T-shaped measuring part of the DSV-50N, and the resistance value (maximum load) is measured and taken as the insertion resistance. It is believed that the insertion resistance is influenced by a combination of factors, such as the ability of the adhesive tape roll to unravel when actually attracting plants, and the friction caused by contact between TMA100 and the adhesive layer of the adhesive tape, and is therefore an evaluation that is directly linked to the overall user experience when using dedicated tools such as TMA100.

[0093] [Table 1]

[0094] [Table 2] [Explanation of symbols]

[0095] 100 Self-adhesive adhesive tape roll 110 Adhesive tape member 111 Tape base material 111a Tape substrate surface 112 Ink layer (colored layer) 113 Primer layer 114 Adhesive layer 114a Adhesive layer surface 120 axis

Claims

1. A self-adhesive adhesive tape roll body obtained by winding an adhesive tape member having a tape-shaped substrate and an adhesive layer provided on one side of the tape-shaped substrate directly or via another layer, the pressure-sensitive adhesive layer contains a filler, The content of the filler having a particle size of 45 μm or more is 0.5% by mass or more based on the total amount of the filler, A self-adhesive adhesive tape roll body, characterized in that the average particle diameter of the filler is 0.1 to 10 μm.

2. The self-adhesive adhesive tape roll according to claim 1 , wherein the filler comprises silica particles and calcium carbonate particles.

3. The coating amount of the pressure-sensitive adhesive layer is 25 to 35 g / m ２ 3. The self-adhesive adhesive tape roll according to claim 1 or 2, wherein

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