JP6545466B2 - Adhesive tape - Google Patents

Description

  The present invention relates to an adhesive tape suitable as a self-wearing adhesive tape.

  The self-wearing adhesive tape is, for example, an adhesive tape for binding various articles such as fresh vegetables, fresh flowers, documents, newspapers, magazines and the like. This type of tape has a characteristic that the adhesive strength to the article to be bound (object to be bound) is small, and the adhesive strength between the adhesive surfaces (hereinafter referred to as "self-adhesive strength") is large (for example, Patent Document 1).

Unexamined-Japanese-Patent No. 2004-161962

  By the way, only the solvent-type self-wearing adhesive tape has existed so far including the self-wearing adhesive tape which concerns on patent document 1 until now. In the case of the solvent type, in addition to environmental problems, there is a risk of safety (especially for food applications), fire hazard, and lack of high-speed productivity. Therefore, in response to the recent increase in environmental awareness, etc., solventless pressure-sensitive adhesives have been required socially. In addition, when used also for food, from the viewpoint of safety, the solvent-free type tends to be preferred to the solvent type. Here, as a non-solvent type pressure sensitive adhesive, there are an emulsion type, a curing type, and a hot melt type. First, in the emulsion type, a surfactant is essential, and there is a concern about the deterioration of the water resistance due to the migration of the surfactant to the surface layer and the deterioration of the adhesive properties such as the contamination of the adherend. In addition, emulsion type elastomers and resins are limited, and it is difficult to obtain the desired adhesive properties. Second, because it is necessary to simultaneously perform coating and polymerization, it is difficult to obtain stable properties, and in some cases, productivity may be sacrificed to reduce the amount of residual monomers. . On the other hand, the hot-melt type is an advantageous method in terms of the decrease in adhesion characteristics derived from impurities and the productivity. However, the composition of the existing self-wearing pressure-sensitive adhesive tape (for example, the composition of the self-wearing pressure-sensitive adhesive tape according to Patent Document 1) is not suitable for coating by the hot melt method because the viscosity is not sufficiently lowered even at high temperatures. A solvent was required at the time of construction. On the other hand, a pressure-sensitive adhesive tape to which a general hot-melt pressure-sensitive adhesive is applied has high adhesive strength, but self-adhesive bonding properties (self-adhesive strength and self-adhesive holding power) are insufficient.

  Therefore, an object of the present invention is to provide a novel pressure-sensitive adhesive tape having self-adhesive binding property, which can be produced by a hot melt method.

The present invention
Adhesive tape,
The thickness of the adhesive is 10 μm or more and 40 μm or less,
The adhesive contains at least an elastomer, a tackifying resin, calcium carbonate, a petroleum plasticizer,
The elastomer is a styrene-isoprene-styrene block copolymer (SIS) having a styrene content of 16% by mass to 40% by mass,
The tackifying resin is a mixture of a tackifying resin having a high softening point and a tackifying resin having a low softening point, and the softening point of the tackifying resin having a low softening point is 80 ° C. or more and less than 120 ° C. The softening point of the tackifying resin is 120 ° C. or more and less than 160 ° C.,
The compounding amount of the tackifying resin having a high softening point is 10% by mass or more and 25% by mass or less,
The specific surface area of the calcium carbonate is 0.8 m ² / g or more and 2.7 m ² / g or less,
The compounding amount of the calcium carbonate is 3.5% by mass or more and 20% by mass or less,
The blending amount of the petroleum plasticizer is 5% by mass or more and 15% by mass or less,
The adhesive property of the adhesive tape is that the self-adhesive force is 13 N / 20 mm or more,
A self-adhesive holding power of 500 g and after 1 hour (that is, when a load of 500 g is applied for 1 hour) is less than 50 mm / 20 mm.
Here, the SIS may be a mixed SIS of a low styrene content SIS having a styrene content of 20% by mass or less and a high styrene content SIS having a styrene content of more than 20% by mass.
Further, the tackifying resin having a high softening point may be an aromatic petroleum resin or an aromatic / aliphatic resin.
The petroleum plasticizer may be a naphthene process oil.
Also, it may be self-wearing. In addition, self-wearing is used for a binding use, and means the thing of 13 N / 20 mm or more of self-adhesiveness, and less than 50 mm / 20 mm of self-adhesive holding power.

  According to the present invention, it is possible to provide a novel pressure-sensitive adhesive tape having self-adhesive binding property, which can be produced also by a hot melt method.

FIG. 1 is a schematic view of a test method in a self-adhesive holding power test.

  Hereinafter, the whole structure of the adhesive tape concerning this invention, the manufacturing method of the said adhesive tape, the physical property of the said adhesive tape, and the use of the said adhesive tape are demonstrated in order.

«Whole composition of adhesive tape»
The pressure-sensitive adhesive tape according to the present invention has a pressure-sensitive adhesive layer formed on a substrate. Each of these elements will be described in detail below.

<Pressure-sensitive adhesive layer>
The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer of the present invention contains at least an elastomer, a tackifying resin, calcium carbonate, and a petroleum plasticizer. Hereinafter, each component and composition are explained.
{component}
(Elastomer)
The elastomer according to the present invention is a styrene-isoprene-styrene block copolymer (SIS) having a styrene content of 16% by mass to 40% by mass. The styrene content is preferably 20% by mass or more and 25% by mass or less. Here, the measurement of the styrene content was calculated by measuring 400 MHz, ¹ H-NMR spectrum (JNM GX400 manufactured by Nippon Denshi Co., Ltd.) using 1,1,2,2-tetrachloroethane-D2 as a solvent. The SIS may be a mixture of two or more, and the total styrene content may be 16% by mass or more and 40% by mass or less. For example, in the case of SIS in which a low styrene content SIS having a styrene content of less than 16% by mass and a high styrene content SIS having a styrene content in excess of 40% by mass, the styrene content of the mixed SIS is 16% to 40% by mass The following is sufficient. When the styrene content is less than 16% by mass, the self-adhesiveness is unfavorably reduced. Moreover, when styrene content exceeds 40 mass%, the cohesion property with respect to vegetables worsens, and it is unpreferable.

(Tackifying resin)
The tackifying resin according to the present invention has a softening point of a low softening point of 80 ° C. or more and less than 120 ° C. (preferably 90 ° C. or more and 105 ° C. or less) and a softening point of 120 ° C. or more and less than 160 ° C. (preferably 125). C. or higher and 140.degree. C. or lower) of a high softening point. When the softening point of the high softening point resin is less than 120 ° C. or exceeds 160 ° C., the self-adhesiveness is lowered and the cohesion to vegetables is unfavorably deteriorated. Specifically, regardless of the tackifying resin having a low softening point or a high softening point, natural products such as rosin resins and terpene resins and derivatives thereof, aliphatic petroleum resins, aliphatic / Synthetic resins such as aromatic resins, alicyclic petroleum resins, aromatic petroleum resins, aromatic / aliphatic resins, coumarone indene resins, styrene resins, phenolic resins, xylene resins and the like can be mentioned. . Among them, the tackifying resin having a high softening point is preferably an aromatic petroleum resin or an aromatic / aliphatic resin. Here, the aromatic / aliphatic resin is a copolymer of an aromatic monomer and an aliphatic monomer, and the degree of polymerization of the aromatic monomer in the copolymer is an aliphatic monomer. It is the same as or higher than the degree of polymerization. Further, an aliphatic / aromatic resin means a resin in which the degree of polymerization of the aliphatic monomer in the copolymer is larger than the degree of polymerization of the aromatic monomer, and from that point on, the aromatic / aliphatic resin and Is different. By adding an aromatic petroleum resin or an aromatic / aliphatic resin and a resin having a high softening point, it is possible to improve the cohesion of the adhesive and to exhibit excellent self-adhesive retention. Here, the aromatic petroleum resin is obtained by cationic polymerization of the C9 fraction of naphtha decomposition oil. For example, indene resin, styrene resin and copolymers thereof can be mentioned. Further, examples of the aromatic / aliphatic resins include indene resins, styrene resins, copolymers of vinyltoluene / isoprene / piperylene, and copolymers of these. In addition, indene type refers to indene and indene derivatives such as methyl indene other than indene. In addition, styrene-based refers to styrene and styrene derivatives such as methyl styrene. Here, the softening point is a value obtained by the softening point test method by the ring and ball method according to "Japanese Industrial Standard" K 6863-1944.

(Calcium carbonate)
The calcium carbonate according to the present invention has a specific surface area of 0.8 m ² / g or more and 2.7 m ² / g or less, more preferably 1.5 m ² / g or more and 2.0 m ² / g or less . If the specific surface area is less than 0.8 m ² / g, streaks are easily generated when applying the pressure-sensitive adhesive, which is not preferable. Moreover, when a specific surface area is larger than 2.7 m < ² > / g, it is easy to give damage, such as peeling a leaf, to vegetables, and is unpreferable. Here, the specific surface area in the present invention means the specific surface area determined by the BET method. Here, the BET method is a method of adsorbing molecules or ions whose size is known on the surface of a sample and measuring the specific surface area of the sample from the amount of adsorption. In the present invention, nitrogen gas is used as a gas to be adsorbed to the sample.

(Petroleum plasticizers)
The petroleum-based plasticizer according to the present invention is, for example, paraffin-based process oil, naphthene-based process oil, aromatic-based process oil or the like. In particular, naphthene-based process oil is preferable in that it is easy to design because it is excellent in compatibility with other components, and in addition to achieving well-balanced adhesive properties, it also reduces viscosity at high temperatures. It is.

(Other additives)
The pressure-sensitive adhesive according to the present invention may contain various additives as required. However, when a solvent is present, the residual solvent in the adhesive is preferably less than 10 ppm. The amount can be analyzed by gas chromatography. In addition, a hot melt means the thing which can heat-melt an adhesive and can apply it. Therefore, coating is possible with less than 10 ppm of the solvent.

{Formulation}
(Blended amount of elastomer)
The blending amount of the elastomer is preferably 30% by mass or more and 45% by mass or less based on the total mass of the pressure-sensitive adhesive composition. Here, although high styrene content SIS and low styrene content SIS can be used alone, a mixture is preferable. In this case, preferably, the low styrene content SIS is 10% by weight or more and 90% by weight or less, and the high styrene content SIS is 90% by weight or less 10% by weight or more, based on the total SIS weight, more preferably the low styrene content The SIS is 40% by mass or more and 80% by mass or less, and the high styrene content SIS is 60% by mass or less and 20% by mass or more. The styrene content of the low styrene content SIS is preferably 14% by mass or more and 20% by mass or less. On the other hand, the styrene content of the high styrene content SIS is more preferably more than 20% by mass and 50% by mass or less, more preferably 25% by mass or more and 50% by mass or less.

(Compounding amount of tackifier resin)
The blending amount of the high softening point tackifying resin is preferably 10% by mass or more and 25% by mass or less based on the total mass of the pressure-sensitive adhesive composition. The blending amount of the low softening point resin is preferably 20% by mass or more and 26% by mass or less based on the total mass of the pressure-sensitive adhesive composition. The blending ratio of the low softening point resin to the high softening point resin (low softening point resin: high softening point resin) is preferably in the range of 2: 1 to 1: 1 (mass ratio) within the range of the above blending amount. If the blending amount of the tackifying resin having a high softening point is less than 10% by mass or more than 25% by mass, the self-adhesiveness is lowered and the cohesion to vegetables is unfavorably deteriorated. Even when the mass ratio is out of the range of 2: 1 to 1: 1, the self-adhesiveness similarly decreases and the cohesion to vegetables is unfavorably deteriorated.

(Blended amount of calcium carbonate)
The compounding amount of calcium carbonate is preferably 3.5% by mass or more and 20% by mass or less based on the total mass of the pressure-sensitive adhesive composition. If the content of calcium carbonate is less than 3.5% by mass, it is likely to cause damage such as peeling of leaves to vegetables, which is not preferable. Moreover, when the compounding quantity of calcium carbonate exceeds 20 mass%, since self-adhesion holding power falls, it is unpreferable.

(Blended amount of petroleum plasticizer)
The blending amount of the petroleum plasticizer is preferably 5% by mass or more and 15% by mass or less based on the total mass of the pressure-sensitive adhesive composition.

<Base material>
The base material of the pressure-sensitive adhesive tape according to the present invention is not particularly limited. For example, a porous material formed of a fibrous substance such as kraft paper, crepe paper, Japanese paper, polyolefin resin, polyester resin, vinyl chloride The plastic film formed with resin, a polyimide-type resin etc. can be mentioned.

  Here, when using the said porous material, in order to adjust characteristics, such as intensity | strength, a weather resistance, and rigidity, you may use what was processed suitably with an impregnating agent, a back surface treating agent, etc. The basis weight and thickness of the porous material are appropriately selected depending on the application and are not particularly limited.

  Further, in addition to those described above, the plastic film can be made preferable from the environmental point of view by using a biodegradable or photodegradable plastic film. Further, a plurality of the above-mentioned materials can be used in combination, and the above-mentioned plastic films can be used together, or a plastic film and a porous material or the like can be laminated and used. Moreover, a porous plastic film can also be used as needed. In addition, the plastic film may be subjected to surface treatment such as corona treatment, plasma treatment or primer treatment on one side or both sides in order to improve the adhesion to the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer. The basis weight of the substrate using this plastic film can be used without particular limitation.

«Production method of adhesive tape»
It contains the above-mentioned (A) elastomer component, (B) tackifying resin component with low softening point, (C) tackifying resin component with high softening point, (D) calcium carbonate component, and (E) petroleum plasticizer component The hot-melt pressure-sensitive adhesive can be obtained by kneading raw materials containing the respective components by a usual method. For example, a hot-melt pressure-sensitive adhesive is obtained by melt-kneading the raw materials usually in a temperature range of 100 ° C. to 200 ° C. in a general tank type mixer, closed type kneader, extruder, etc., if necessary, in nitrogen gas atmosphere. You can get

  Under the present circumstances, when the said raw material is added to the tackifying resin component of (A) elastomer component and (C) high softening point, and contains (E) petroleum-based plasticizer component, when it contains many (D) calcium carbonate components. Even if it is, the kneadability of the raw material can be improved.

  A pressure-sensitive adhesive tape can be obtained by applying the pressure-sensitive adhesive thus obtained on the above-described substrate. As a coating method, for example, a method of applying on a substrate a hot melt adhesive which is heated and melted by an applicator, a coater or the like, a cast in which a hot melt adhesive dissolved in a solvent is applied on a substrate Molding method, method of immersing adherend in molten hot melt pressure sensitive adhesive, method of blowing molten hot melt pressure sensitive adhesive onto a substrate, forming hot melt pressure sensitive adhesive into a tape shape to a substrate The lamination molding method to laminate, the multilayer molding method which shape | molds a hot melt adhesive and a base material composition simultaneously at the film form, and forms a laminated body etc. are mentioned.

  Under the present circumstances, the thickness of an adhesive layer is 10 micrometers or more and 40 micrometers or less.

«Physical properties of adhesive tape»
(Self-attachment)
The self-adhesive force of the pressure-sensitive adhesive tape according to the present invention is 13 N / 20 mm or more. The self-adhesiveness test method is as follows.
[Self-adhesiveness test]
With a tape (width 20 mm) as a test piece under the conditions of 23 ° C. and 50% RH, with the adhesive surface of the test piece inside, stack them so that the bonding length is 100 mm or more, with a 50 mm wide 2 kg roller The pressure was reciprocated one at a speed of 300 mm / min and left for 30 minutes. Thereafter, the test piece was fixed to an Instron tensile tester, T-peel was performed at a peel rate of 300 mm / min, and the peel force (N / 20 mm) obtained at that time was measured.

(Attachment holding power)
The self-adhesive holding power of 500 g of the adhesive tape according to the present invention after one hour is less than 50 mm / 20 mm. The self-adhesiveness test method is as follows (see FIG. 1).
[Test of self-adhesive holding characteristics]
With a tape (width 20 mm) as a test piece under the conditions of 23 ° C. and 50% RH, with the adhesive surface of the test piece inside, stack so that the bonding length is 100 mm or more, and use a 50 kg wide 2 kg roller Crimp one cycle at a speed of 300 mm / min and leave for 30 minutes. Thereafter, as shown in FIG. 1, one end of the test piece is fixed, and a 500 g weight is placed on the other end. Before applying the weight, peel off the bonded part by about 5 mm and mark the boundary with oil-based ink. After 1 hour, with a weight applied, the gap distance (between the marks of the oil-based ink) is read with a caliper.

(Test of cohesion)
Using spinach, asparagus and lettuce of specified weight with a 20 mm wide tape at 5 ° C. and binding them with Nichiban-Spring et al. 3000-V, binding after 7 days and bonding to various vegetables The presence of damage such as leaf strain was evaluated.

«Application of adhesive tape»
Although the use of the adhesive tape which concerns on this invention is not specifically limited, It is useful as an adhesive tape for self-adhesive bonding.

  Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to the examples.

«Raw material»
<Elastomer>
{Low styrene content SIS}
(A-1) Quintac 3421 Nippon Zeon Co., Ltd. Styrene content of 14% by mass
(A-2) Quintack 3433N Nippon Zeon Co., Ltd. Styrene content 16% by mass
{High styrene content SIS}
(A-3) Quintack SL 165 Nippon Zeon Co., Ltd. Styrene content: 30% by mass
(A-4) Quintac 3390 Nippon Zeon Co., Ltd. Styrene content 48 mass%
<Tackifying resin>
{Aliphatic resin}
(B-1) Quinton M100 Softening point 95 ° C ZEON CORPORATION
{Aliphatic / aromatic resin}
(B-2) Quinton S195 Softening point 94 ° C. Nippon Zeon Co., Ltd.
{Terpenoid resin}
(B-3) YS resin PX1000 Softening point 100 ° C Yasuhara Chemical Co., Ltd.
{Rosin ester resin}
(B-4) Superester A100 Softening point 100 ° C Arakawa Chemical Industries, Ltd.
{Aromatic resin}
(B-5) Nisseki Neopolymer Unmodified Type Grade L-90 Softening Point 95 ° C JX Nippon Oil & Energy Corporation
(B-6) Nisseki Neopolymer Unmodified Type Grade 120 Softening Point 120 ° C JX Nippon Oil & Energy Corporation
(B-7) Nisseki Neopolymer Unmodified Type Grade 130 Softening point 130 ° C JX Nippon Oil & Energy Corporation
(B-8) Nisseki Neopolymer Unmodified Type Grade 150 Softening Point 155 ° C JX Nippon Oil & Energy Corporation
(B-9) Nisseki Neopolymer unmodified type Grade 170S Softening point 160 ° C JX Nippon Oil & Energy Corporation
{Aromatic / aliphatic resin}
(B-10) FTR 6125 styrenic / aliphatic softening point 125 ° C. Mitsui Chemical Co., Ltd.
<Calcium carbonate>
(C-1) BF-001 Specific surface area 0.5 m ² / g Shiroishi Calcium Co., Ltd.
(C-2) Softon 1000 Specific surface area 1.0 m ² / g Shiroishi Calcium Co., Ltd.
(C-3) Softon 1500 Specific surface area 1.5 m ² / g Shiroishi Calcium Co., Ltd.
(C-4) Super # 2300 Specific surface area 2.3 m ² / g Maruo Calcium Co., Ltd.
(C-5) Softon 3200 specific surface area 3.2 m ² / g Shiroishi Calcium Co., Ltd.
<Petroleum plasticizers>
(D-1) SANSEN 450 naphthenic process oil Nippon San Oil Co., Ltd.
(D-2) SUNPER 150 Paraffin-based process oil Nippon Sun Oil Co., Ltd.

«Production method»
Example 1
20 parts by mass of (C-3) as a filler, 60 parts by mass of (B-1) as a tackifying resin, in 50 parts by mass of (A-2) and 50 parts by mass of (A-3) as an elastomer 50 parts by mass, 25 parts by mass of a plasticizer (D-1), and 1 part by mass of "Irganox 1010 manufactured by BASF Corp." as an antioxidant are melt mixed at 180 ° C. to obtain a hot melt adhesive. Thereafter, a 43 μm-thick polypropylene film was subjected to corona treatment and then subjected to a printing process having a primer effect, and applied thereon so that the thickness of the pressure-sensitive adhesive layer was 24 μm, to prepare a pressure-sensitive adhesive tape of 20 mm wide.
(Examples 2 to 21, Comparative Examples 1 to 12)
Based on the components and combinations shown in Tables 1 to 3, the adhesive tapes according to Examples 2 to 21 and the adhesive tapes according to Comparative Examples 1 to 12 were manufactured in the same manner as in Example 1.

«Evaluation result»
Tables 1 to 3 show the evaluation results of self-adhesiveness, self-adhesive strength, adhesive property of various vegetables (spinach, asparagus, lettuce) and damage presence or absence of the adhesive tapes according to Examples and Comparative Examples.

(Composition change test based on Example 1)
Furthermore, in the pressure-sensitive adhesive tape according to Example 1, the same composition, blending amount, and the like were tested except that the following points were changed. As a result, the following results were obtained. The good results described below mean that the self-adhesiveness of the adhesive tape, the self-adhesion holding power, and the comprehensive evaluation of the evaluation results of the presence or absence of damage of various vegetables are good as in the evaluation in the above example. means.

  First, regarding the elastomer, good results were confirmed when the styrene content was 16% by mass or more and 40% by mass or less. In addition, the result of the combination of high styrene content SIS and low styrene content SIS is good, especially the result of high styrene content SIS of 90% by mass or less and 10% by mass or more, high styrene content What made SIS 60 mass% or less and 20 mass% or more was the best.

  Next, regarding the tackifying resin, good results can be confirmed for a mixture of a low softening point having a softening point of 80 ° C. or more and less than 120 ° C. and a high softening point having a softening point of 120 ° C. or more and less than 160 ° C. The Particularly good results have been confirmed for mixtures of low softening point with a softening point of 90 ° C. or more and 105 ° C. or less and high softening point with a softening point of 125 ° C. or more and 140 ° C. or less. In addition, regarding the compounding amount of the tackifying resin having a high softening point, good results were confirmed when the amount was 10% by mass or more and 25% by mass or less based on the total mass of the pressure-sensitive adhesive composition. Moreover, about the compounding ratio of low softening point resin and high softening point resin (low softening point resin: high softening point resin), it is a favorable result, when it is the range (mass ratio) of 2: 1 to 1: 1. That was confirmed.

Next, with respect to calcium carbonate, the specific surface area is confirmed good results for 0.8 m ² / g or more 2.7 m ² / g or less of those having a specific surface area of 1.5 m ² / g or more 2.0 m ² / Better results were confirmed for those below g. In addition, it has been confirmed that the compounding amount is a good result when it is 3.5% by mass or more and 20% by mass or less based on the total mass of the pressure-sensitive adhesive composition.

  Next, with respect to petroleum-based plasticizers, the case where naphthene-based process oil was used was particularly good, and it was confirmed that the blending amount was good when it was 5% by mass or more and 15% by mass or less .

Claims (6)

Adhesive tape,
The thickness of the adhesive is 10 μm or more and 40 μm or less,
The adhesive contains at least an elastomer, a tackifying resin, calcium carbonate, a petroleum plasticizer,
The elastomer is a styrene-isoprene-styrene block copolymer (SIS) having a styrene content of 16% by mass to 40% by mass,
The tackifying resin is a mixture of a tackifying resin having a high softening point and a tackifying resin having a low softening point, the softening point of the tackifying resin having a low softening point is 80 ° C. or more and less than 120 ° C., and the high softening point The softening point of the tackifying resin is 120 ° C or more and less than 160 ° C,
The compounding amount of the high softening point tackifying resin is 10% by mass or more and 25% by mass or less based on the total mass of the pressure-sensitive adhesive composition ,
The specific surface area of the calcium carbonate is 0.8 m ² / g or more and 2.7 m ² / g or less,
The compounding amount of the calcium carbonate is 3.5% by mass or more and 20% by mass or less based on the total mass of the pressure-sensitive adhesive composition ,
The blending amount of the petroleum-based plasticizer is 5% by mass or more and 15% by mass or less based on the total mass of the pressure-sensitive adhesive composition ,
The pressure-sensitive adhesive is a hot melt type,
The adhesive property of the adhesive tape is that the self-adhesive force is 13 N / 20 mm or more,
A self-adhesive holding power after 500 g and 1 hour is less than 50 mm / 20 mm.   The pressure-sensitive adhesive tape according to claim 1, wherein the SIS is a mixed SIS of a low styrene content SIS having a styrene content of 20% by mass or less and a high styrene content SIS having a styrene content of more than 20% by mass.   The pressure-sensitive adhesive tape according to claim 1 or 2, wherein the high softening point tackifying resin is an aromatic petroleum resin or an aromatic / aliphatic resin.   The pressure-sensitive adhesive tape according to any one of claims 1 to 3, wherein the petroleum-based plasticizer is a naphthene-based process oil.   The pressure-sensitive adhesive tape according to any one of claims 1 to 4, which is self-wearing. The adhesive tape according to any one of claims 1 to 5, wherein the solvent contained in the adhesive is less than 10 ppm.

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