JP2019218420A - Adhesive tape - Google Patents

Abstract

To provide an adhesive tape such as a tape for cure, excellent in hand tearability, linear cutting property, having a smooth tape surface, having no delamination, excellent in followability to a curve, a rough surface and an uneven surface, and water resistance, and further less in tape breakage when peeled after construction.SOLUTION: There is provided an adhesive tape consisting of a tape substrate in which a transversal uniaxial drawing thermoplastic resin film is conjugated to a thermoplastic long fiber spunbonded unwoven fabric having embossment processing conducted in a width direction in a line shape or a broken line shape by aligning a width direction of the uneven fabric and the width direction of the film.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an adhesive tape. More specifically, the present invention is excellent in hand-cutting properties, excellent in straight-line cutting, has a smooth tape surface, has no delamination, and has excellent followability to curved, rough, and uneven surfaces, and excellent water resistance. The present invention relates to an adhesive tape such as a curing tape or the like, which has little breakage of a tape when peeled off after construction.

As the base material of the adhesive tape, a paper base material such as Japanese paper and crepe paper, a woven base material made of spun yarn mainly composed of rayon swoof and cotton, a nonwoven fabric made of a thermoplastic resin and a film made of a polyolefin resin are known. . Adhesive tapes using these substrates are preferably used for painted masking tapes for vehicles and construction, curing tapes, cardboard packaging, medical care, electrical insulation, and the like.
Recently, adhesion to masking tapes, curing tapes, etc., with excellent conformability to curved, rough, and irregular surfaces, and excellent water resistance, with little tape breakage when peeled after construction, and with good hand-cutting properties An adhesive tape using a spunbond thermoplastic long-fiber nonwoven fabric provided with hand-cutting properties by embossing as a base material of the tape has been proposed (see Patent Document 1 below).
However, the pressure-sensitive adhesive tape described in Patent Literature 1 has a capability to follow a curved surface, a rough surface, and an uneven surface, has little tape breakage when peeled off after construction, and has a hand-cutting property. There is a problem that the tape is not cut straight but cut diagonally, and the non-woven fabric on the tape surface is poor in smoothness and poor in sticking property.

On the other hand, Patent Literature 2 below proposes a pressure-sensitive adhesive tape having a polyethylene-based film as a base material as a pressure-sensitive adhesive tape having good hand-cutting properties and straight-line cutting properties.
However, although the pressure-sensitive adhesive tape described in Patent Document 2 is excellent in hand-cutting properties and straight-line cutting properties, the pressure-sensitive adhesive tape is thin and has poor followability to curved, rough, and uneven surfaces. There are problems such as breakage of the tape.

Patent Document 3 below proposes a pressure-sensitive adhesive tape formed by bonding a nonwoven fabric and an olefin-based film and impregnating the nonwoven fabric with a pressure-sensitive adhesive.
However, the pressure-sensitive adhesive tape described in Patent Literature 3 is such that the nonwoven fabric is thin, has poor followability to curved, rough, and uneven surfaces, and further has poor hand-cutting properties of the nonwoven fabric, and has large variations in hand-cutting properties. There's a problem.

Japanese Patent No. 6104170 JP 2007-70561 A JP-A-11-71555

  In view of the current state of the prior art described above, the problems to be solved by the present invention are excellent in hand-cutting property and straight-line cutting property, having a smooth tape surface, no delamination, a curved surface, a rough surface, and an uneven surface. An object of the present invention is to provide a pressure-sensitive adhesive tape such as a curing tape, which is excellent in followability to water and water resistance and has little breakage of the tape when peeled off after construction.

  The inventors of the present application have conducted intensive research and repeated experiments in order to solve the above-mentioned problems, and as a result, a thermoplastic nonwoven fabric and a transverse uniaxially stretched thermoplastic resin film, which have been embossed in a width direction in a linear or broken line, have been obtained. It has been unexpectedly found that the above problem can be solved by forming a bonded tape base material by aligning the width direction of the nonwoven fabric with the lateral direction of the film. The present invention has been completed.

That is, the present invention is as follows.
[1] A thermoplastic long-fiber spunbonded nonwoven fabric embossed linearly or dashedly in the width direction is provided with a horizontally uniaxially stretched thermoplastic resin film by aligning the width direction of the nonwoven fabric with the transverse direction of the film. , A pressure-sensitive adhesive tape comprising a bonded tape substrate.
[2] The basis weight of the thermoplastic long-fiber spunbond nonwoven fabric is 15 to 60 g / m ² , the horizontal uniaxially stretched thermoplastic resin film is a horizontal uniaxially stretched polyethylene film, and the nonwoven fabric has a glass transition temperature. The pressure-sensitive adhesive tape according to the above [1], wherein a synthetic resin having a temperature of 25 ° C. or less is impregnated with the synthetic resin after drying in an amount of 5 to 150 wt% based on the basis weight of the nonwoven fabric.
[3] The pressure-sensitive adhesive tape according to [1] or [2], wherein an adhesive is applied to the nonwoven fabric surface of the tape base material, and a release agent is applied to the film surface.
[4] The method according to any one of [1] to [3], wherein the transverse uniaxially stretched thermoplastic resin film is a transverse uniaxially stretched film of a high-density polyethylene alone or a mixture of a high-density polyethylene and a low-density polyethylene. Adhesive tape.

  The pressure-sensitive adhesive tape of the present invention is excellent in hand-cutting properties and straight-line cutting properties, has a good tape-over property because it has a smooth tape surface, has no delamination, and has a curved surface, a rough surface, and a conformity to an uneven surface, In addition, since it has excellent water resistance and has little tape breakage when peeled off after application, it can be suitably used as a masking tape, especially a masking tape for rough coating, a tape for curing, etc. used by sticking to a rough surface. .

FIG. 4 is a diagram for explaining a method of measuring hand-cutting property and straight-cutting property, before evaluation of hand-cutting property. It is a figure after a hand cut property evaluation explaining a measuring method of hand cut property and straight cut property.

Hereinafter, embodiments of the present invention will be described in detail.
The pressure-sensitive adhesive tape of the present embodiment is a thermoplastic long-fiber spunbonded nonwoven fabric that has been subjected to embossing in a linear or broken line in the width direction. It is characterized by being made of a tape base material joined in the lateral direction. The basis weight of the thermoplastic long-fiber spunbond nonwoven fabric is 15 to 60 g / m ² , the horizontal uniaxially stretched thermoplastic resin film is a horizontal uniaxially stretched polyethylene-based film, and the nonwoven fabric has a glass transition temperature of 25 ° C. or less. Of the synthetic resin after drying is preferably impregnated with 5 to 150 wt% based on the basis weight of the tape base material.

The first feature of the pressure-sensitive adhesive tape of the present embodiment is that a thermoplastic long fiber spunbonded nonwoven fabric (hereinafter, also referred to as a spunbonded nonwoven fabric, simply referred to as a nonwoven fabric) in which a tape base material is embossed in a width direction and a transverse uniaxial stretching heat Following a plastic resin film (hereinafter, also simply referred to as a film) by using a tape base material in which the width direction of the nonwoven fabric and the lateral direction of the film are joined to each other to follow a curved surface, a rough surface, and an uneven surface. That is, it has excellent properties, hand-cutting properties, and straight-line cutting properties.
That is, by using a thermoplastic long-fiber spunbonded nonwoven fabric for the base material, the base material is rich in flexibility, excellent in following the curved surface, rough surface, and uneven surface, and the tape breakage when peeled after the application is reduced. Further, the thermoplastic long fiber spunbonded nonwoven fabric is easily torn in the longitudinal direction because the fiber filaments are arranged in the flow direction (longitudinal direction, machine direction), but is hard to be torn in the transverse direction for cutting the fiber filament. Poor hand cutting. For this reason, in this embodiment, embossing is performed in the width direction in a linear or broken line shape, and the fiber filaments constituting the nonwoven fabric are partially resinified by pressure-compression bonding and thermocompression bonding to be brittle, so that the fiber filaments in the horizontal direction are formed. Using a spunbonded nonwoven fabric with hand-cutting properties as a tape base material, and furthermore, when tearing in the width direction of the tape, preventing the tape from tearing in the longitudinal direction without the cut of the embossed portion propagating linearly in the width direction. The nonwoven fabric is reinforced (joined) with a horizontal uniaxially stretched thermoplastic resin film that allows easy horizontal tearing, so that horizontal tearing of the embossed portion can be propagated and excellent hand-cutting and straight-line cutting properties can be achieved. I have it.

The second characteristic of the pressure-sensitive adhesive tape of the present embodiment is that the tape base material has a hybrid structure of a nonwoven fabric and a film, and the nonwoven fabric is impregnated with a flexible synthetic resin having a low glass transition temperature, so that the rough surface conformability is improved. And the removability can be maintained at a high level.
That is, in the pressure-sensitive adhesive tape of the present embodiment, in addition to the flexibility of the non-woven fabric of the tape base material, the thickness of the pressure-sensitive adhesive layer can be increased, the followability to the uneven rough surface is improved, and the adhesive force is also high. In addition, by synthetically impregnating a non-woven fabric with a flexible resin having a low glass transition temperature, the effect of stopping the voids of the non-woven fabric with the amount of resin can be obtained, and the flexibility of the non-woven fabric is not impaired. Without, further, the back side of the film adhesive tape, for example, a masking tape for painting, has good lamination properties when painting, and good adhesion between tapes, so paint with the tape after peeling off The interface of the tape can be neatly finished. That is, the paint parting property is good.

[Tape base material]
The tape base material used for the pressure-sensitive adhesive tape of the present embodiment, a thermoplastic long fiber spunbonded nonwoven fabric and a uniaxially stretched thermoplastic resin film embossed linearly or dashedly in the width direction are formed in the width direction of the nonwoven fabric. And the film are joined in the horizontal direction.

[Spunbonded nonwoven fabric embossed linearly or dashedly in the width direction]
The spunbonded nonwoven fabric embossed linearly or dashedly in the width direction is a long-fiber nonwoven fabric manufactured by a spunbonding method using a thermoplastic resin, and is a mechanical fiber when manufactured by the spunbonding method. It has a partial thermocompression bonding part to improve the strength and a partial thermocompression bonding part by embossing that gives a different hand-cutting property from this partial thermocompression bonding part. It has high strength in the length direction when cut, and is easy to cut in the width direction, and is excellent in hand-cutting properties.

  The constituent fibers of the spunbonded nonwoven fabric are not particularly limited, but are selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene isophthalate, copolymerized polyester, polylactic acid, and aliphatic polyester. Fiber, polyolefin fiber selected from the group consisting of high density polyethylene, low density polyethylene, polypropylene, and ethylene-propylene copolymer, and polyamide fiber selected from the group consisting of nylon 6, nylon 66, nylon 610, and nylon 612 Is mentioned. Further, a core-sheath structure, a conjugate fiber composed of two components such as side-by-side, for example, a core having a high melting point and a sheath having a low melting point, specifically, a core having polyethylene terephthalate, polybutylene terephthalate, a copolymerized polyester, A fiber made of a high melting point resin such as nylon 6, nylon 66, etc., and a sheath made of a low melting point resin such as low density polyethylene, high density polyethylene, polypropylene copolymerized polyethylene, copolymerized polypropylene, copolymerized polyester, or aliphatic polyester; Is also good. Further, as the heat-resistant fiber, for example, polybenzazole fiber (PBO), polyphenylene sulfide fiber (PPS), polyimide fiber (PI), fluorine fiber, polyetheretherketone fiber (PEEK), etc. may be used. it can.

  The fiber constituting the spunbond nonwoven fabric preferably has a fiber diameter of 0.1 to 30 μm, more preferably 0.1 to 25 μm, further preferably 1 to 20 μm, particularly preferably 1.5 to 20 μm, most preferably Preferably it is 2 to 20 μm. The fiber configuration of the long-fiber nonwoven fabric can be selected from fibers having the same fiber diameter, mixed fibers of different fiber diameters such as ultrafine fibers and thick fibers, or lamination. In the case of lamination, it is a lamination of an ultrafine fiber (M) having a fiber diameter of 0.1 to 7 μm and a synthetic fiber (S) having a fiber diameter of 10 to 30 μm, and 2 to 8 such as SM, SMS, SMMS, and SSMMSS. A fiber configuration with multiple layers can be selected. In particular, when a multilayer structure is used, it is possible to impart characteristics such as that the fibers can be strongly bonded, the fiber structure is uniformed, the dispersibility of the fibers is improved, and the concealment property is improved.

Basis weight of the spunbonded nonwoven fabric of the present embodiment is preferably from 15 to 60 g / ^{m 2,} more favorable properly 20 to 60 g / ^{m 2,} more preferably from 20 to 50 g / ^{m 2.}
The thickness of the spunbonded nonwoven fabric of the present embodiment is preferably from 30 to 500 μm, more preferably from 40 to 400 μm, and still more preferably from 45 to 350 μm.
When the fiber diameter of the fiber constituting the nonwoven fabric is less than 0.1 μm, the basis weight is less than 15 g / m ² , and the thickness is less than 30 μm, the strength as a tape is reduced and the tape is easily broken. On the other hand, when the fiber diameter exceeds 30 μm, the basis weight is 60 g / m ² , and the thickness exceeds 500 μm, high tenacity is obtained, but flexibility is reduced and followability to a rough surface having irregularities is reduced.

  When used for a masking tape, a curing tape, etc., it is preferable to reduce the thickness by calendering from the viewpoints of handleability, reduction of the amount of impregnated resin, hand-cutting property, etc., and in that case, the thickness of the nonwoven fabric is 30 to It is preferably 150 μm, more preferably 45 to 130 μm, further preferably 30 to 120 μm, and most preferably 30 to 100 μm.

The linear or broken line embossing in the width direction of the spunbonded nonwoven fabric tape is performed for the purpose of imparting hand-cutting properties when the tape is formed.
The linear or dashed embossing is applied at an oblique angle to the roll rotation axis, so that intermittent contact between the upper and lower rolls becomes continuous contact, and the generation of contact noise can be reduced, and engraving can be performed. Wear can be improved. The oblique angle is preferably 0.2 degrees or more, more preferably 0.5 to 5.0 degrees, and particularly preferably 0.7 to 3 degrees. With the oblique embossing, the depth ratio of the concave portion of the concave portion, the hand-cutting property, the workability such as noise, and the durability of the engraved pattern can be improved. The embossed shape is composed of a relatively thin, linear or broken projection. In the linear embossed shape, the width of the convex portion and the emboss interval are limited to specific ranges in view of hand-cutting properties, strength, and the like. The width of the projection is preferably 0.1 to 2.0 mm, more preferably 0.12 to 1.5 mm, and still more preferably 0.15 to 1.0 mm, and the emboss interval is preferably 1 to 10 mm. It is preferably 2 to 10 mm, more preferably 2.5 to 7 mm, particularly preferably 2 to 6 mm, and most preferably 2 to 5 mm. As the embossed shape of the broken line, the width of the convex portion and the embossing interval are selected from the same range as the linear shape, but the ratio (A / B) of the length of the embossed portion A to the non-embossed portion B is 1.0. -3.0, more preferably 1.1-2.5, even more preferably 1.2-2.0.

  The embossing condition is performed between a pair of embossing rolls and a smoothing roll. The surface temperature of the embossing roll is preferably room temperature (20 ° C.) to (a temperature lower than the melting point of the nonwoven fabric), more preferably 50 ° C. to (a temperature 30 ° C. lower than the melting point of the nonwoven fabric), even more preferably 70 ° C. to (the melting point of the nonwoven fabric). (Temperature lower than 50 ° C.). The pressure is preferably from 10 to 1000 N / cm, more preferably from 20 to 700 N / cm, and still more preferably from 30 to 500 N / cm. If the surface temperature of the embossing roll is lower than normal temperature (20 ° C.) and the pressure is lower than 10 N / cm, the degree of embossing is reduced, and the desired hand-cutting property cannot be obtained. On the other hand, if the temperature exceeds the melting point of the nonwoven fabric or the pressure exceeds 1000 N / cm, workability is extremely reduced, such as fusion to a hot roll.

  The dent depth ratio of the concave portion of the nonwoven fabric formed by embossing is an important item affecting hand-cutting properties. Therefore, the depression depth ratio, which is the ratio of the depression depth of the linear or broken embossed portion to the thickness of the non-embossed portion, is preferably 65 to 90%, more preferably 70 to 90%, and even more preferably 75. ~ 90%. If the dent depth ratio is less than 65%, the resinification of the concave portion becomes insufficient, and the hand-cutting property deteriorates. On the other hand, if it exceeds 90%, the resinization of the concave portion is excessive, and the generation of holes tends to occur. .

[Horizontal uniaxially stretched thermoplastic resin film]
Although the transverse uniaxially stretched thermoplastic resin film is not particularly limited, a polyethylene resin composition in which high-density polyethylene (hereinafter, also referred to as HDPE) alone or a mixture of HDPE and low-density polyethylene (hereinafter, also referred to as LDPE) is used. Is preferably a uniaxially stretched film.
The transverse uniaxial stretching ratio is preferably from 6 to 16 times, and more preferably from 9 to 15 times. If the stretching ratio is less than 6 times, the film will not tear linearly in the stretching direction, while if it exceeds 16 times, stretching becomes difficult.
The thickness of the film is preferably 5 to 100 μm, and more preferably 10 to 60 μm. If the thickness is less than 5 μm, the strength required as a film may be insufficient, while if it exceeds 100 μm, it may be difficult to tear.
Film production conditions are not particularly limited as long as they do not affect the hand-cutting property and the straight cutting property.

[Joint of spunbond nonwoven fabric and film]
The joining method between the spunbonded nonwoven fabric and the film is not particularly limited. For example, a method of extruding or extruding a melt-extruded thermoplastic resin between the spunbonded nonwoven fabric and the film (extruding or sand laminating), an adhesive (Dry lamination), a method of thermocompression bonding a spunbonded nonwoven fabric and a film between heating rolls and laminating (thermocompression lamination), and the like. As a joining method between the spunbonded nonwoven fabric and the film, extrusion lamination is preferable. At this time, a corona treatment may be applied to the bonding surface of the nonwoven fabric.
In the pressure-sensitive adhesive tape of the present embodiment, a thermoplastic long-fiber spunbonded nonwoven fabric and a transverse uniaxially stretched thermoplastic resin film that have been subjected to embossing in a linear or dashed shape in the width direction are formed in the width direction of the nonwoven fabric and in the width direction of the film. It is necessary that they are joined in the horizontal direction.

[Impregnation with synthetic resin]
The nonwoven fabric constituting the tape base of the pressure-sensitive adhesive tape of the present embodiment contains a synthetic resin having a glass transition temperature of 25 ° C. or less as a synthetic resin amount after drying of 5 to 150 wt% based on the basis weight of the tape base. Is preferably impregnated.
The impregnation of a tape base fabric, especially a synthetic resin applied to the nonwoven fabric, is to reduce the voids of the fibers of the nonwoven fabric constituting the tape base fabric and improve the hand-cutting property of the tape (adhesion of fibers, reduction of voids). To prevent the penetration of the processing agent into the non-woven fabric when applying a release agent or a pressure-sensitive adhesive to the surface of the tape base sheet to be processed (prevent the penetration of the processing agent) and to improve the strength of the base fabric Do. The synthetic resin is preferably selected from soft synthetic resins having a glass transition temperature (Tg) of 25 ° C. or less, for example, natural rubber, synthetic rubber, (meth) acrylate copolymer, ethylene-vinyl acetate copolymer. It is at least one or two or more selected from the group consisting of polymers, polyvinyl acetate, polyvinyl chloride, and polyurethane. The glass transition temperature is more preferably from 10C to -70C, even more preferably from -10C to -60C. In the present specification, the term “synthetic resin” includes natural rubber. An aqueous dispersion prepared by mixing an aqueous dispersion having a glass transition temperature higher than 25 ° C. and an aqueous dispersion having a glass transition temperature lower than 25 ° C. so that the average value of the glass transition temperature is 25 ° C. or lower. The synthetic resin may be dispersed in an organic solvent, a volatile oil, or the like. The lower the glass transition temperature of the synthetic resin, the more flexible the resin.

It is preferable to add a filler, a pigment, an ultraviolet absorber, and an antioxidant to the synthetic resin because ultraviolet rays and heat are blocked, and deterioration of the tape base sheet and the adhesive layer is prevented.
When the synthetic resin has a functional group, the resin may be cross-linked by using various crosslinking agents capable of reacting with the functional group, for example, a metal compound, an amino compound, an epoxy compound, an isocyanate compound and the like. The crosslinking agent can be used alone or in combination of two or more depending on the respective functional groups. When the crosslinking is performed, the interlayer strength between the nonwoven fabric and the film is increased, and the removability of the tape (no adhesive residue and no breakage of the tape substrate) is improved.

  Examples of the impregnation treatment include a method of impregnating a nonwoven fabric with a synthetic resin by a roll coater method, a comma coater method, or the like. After the resin impregnation, a solvent such as an organic solvent is dried at a temperature of 50 to 200 ° C. The impregnated amount of the synthetic resin after drying is preferably 5 to 150 wt%, more preferably 10 to 150 wt%, further preferably 15 to 130 wt%, and particularly preferably 20 to 100 wt% based on the basis weight of the nonwoven fabric. When the amount of the synthetic resin impregnated is less than 5 wt%, the voids of the fibers constituting the nonwoven fabric are less reduced, and the adhesive strength with the adhesive tends to be insufficient. If the synthetic resin impregnation amount exceeds 150 wt%, the flexibility is impaired, especially when a synthetic resin having a high glass transition temperature of more than 25 ° C. is used, and the conformity to the uneven surface as a tape is reduced.

  Fillers and pigments that can be blended with the synthetic resin are not particularly limited, and include, for example, inorganic ones such as calcium carbonate and titanium oxide, and organic ones such as phthalocyanine blue and dye lake. These may be used alone or in combination of two or more, and may be appropriately blended with the impregnated synthetic resin as long as the texture of the tape base material is not impaired.

  The ultraviolet absorber and antioxidant that can be added to the synthetic resin are also not particularly limited, and examples of the ultraviolet absorber include salicylic acid derivatives, benzophenone-based ones, and benzotriazole-based ones. Examples of the agent include naphthylamine type, P-phenylenediamine type, amine mixture, other amine type, quinoline type, hydroquinone derivative, monophenol type, bis, tris, polyphenol type And thiobisphenols, hindered phenols and phosphites. These ultraviolet absorbers and antioxidants may be used alone or in combination of two or more. The compounding amount is usually selected in the range of 0.05 to 5 parts by weight based on 100 parts by weight of the impregnated resin.

[Adhesive]
The pressure-sensitive adhesive that can be applied to one surface of the tape base material of the present embodiment is not particularly limited, and a conventional pressure-sensitive adhesive can be used, and is used by being dissolved or dispersed in a solvent (including water). The viscosity can be reduced to a state where the composition can be applied by heating, and the form of use is not particularly limited. Specifically, the pressure-sensitive adhesive can be at least one selected from the group consisting of a rubber-based pressure-sensitive adhesive, an acrylic-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a urethane-based pressure-sensitive adhesive. Preferably 5 to 100 g / ^{m 2} as a coating amount of the adhesive, more preferably 15 to 80 g / ^{m 2,} more preferably from 20 to 60 g / ^{m 2.}

  As the rubber-based pressure-sensitive adhesive, any conventionally known rubber-based pressure-sensitive adhesive may be used, and natural rubber, butyl rubber, butadiene rubber, isobutylene rubber, styrene-butadiene copolymer rubber, styrene-butadiene-styrene copolymer may be used. Polymerized rubber, styrene-isoprene copolymer rubber, styrene-isoprene-styrene copolymer rubber, acrylonitrile-butadiene copolymer rubber, acrylonitrile-butadiene-isoprene copolymer rubber, methyl methacrylate-grafted natural rubber, styrene-grafted natural rubber, acrylonitrile-grafted natural Rubber, synthetic isoprene rubber, ethylene-propylene copolymer rubber, ethylene-propylene-diene copolymer rubber, ethylene-vinyl acetate copolymer rubber, ethylene-acrylate copolymer rubber, ethylene-acrylonitrile copolymer Compound rubber, butadiene- (meth) acrylate copolymer rubber, polyether urethane rubber, polyester urethane rubber, liquid isoprene rubber, liquid butadiene, liquid styrene-butadiene copolymer rubber, liquid acrylonitrile-butadiene copolymer rubber, liquid oxypropylene Rubber and the like can be mentioned.

Examples of the acrylic pressure-sensitive adhesive include (A) an alkyl acrylate having 4 to 12 carbon atoms in an alkyl group and / or 85 to 98.9 wt% of an alkyl methacrylate having 4 to 18 carbon atoms in an alkyl group; B) A monomer mixture comprising 0.1 to 5% by weight of an α, β-unsaturated carboxylic acid, or a monomer copolymerizable with these components in an amount not exceeding 40 parts by weight per 100 parts by weight of the monomer mixture. And a polymer obtained by polymerizing the monomer mixture of 15 to 1.1 wt%.
Examples of the silicone-based pressure-sensitive adhesive include a silicone-based pressure-sensitive adhesive that is a raw rubber-like diorganopolysiloxane having an average of one or more silicon-bonded alkenyl groups in one molecule.

In producing the pressure-sensitive adhesive tape of the present embodiment, a rubber-based pressure-sensitive adhesive, an acrylic-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a urethane-based pressure-sensitive adhesive that can be applied to the tape base material are required as long as the desired effect is not impaired. Accordingly, various additives such as a filler, a pigment, an ultraviolet ray inhibitor, an antioxidant, a known tackifying resin, a plasticizer, and a crosslinking agent used in the above-mentioned impregnated synthetic resin can be contained.
As the pressure-sensitive adhesive tape that can be used in cold regions, preferable selections of pressure-sensitive adhesives and additives are made, such as selection of a resin having adhesive strength in cold regions and adjustment of additives.
In addition, a tackifier resin can be used as the pressure-sensitive adhesive, and the tackifier resin is not particularly limited. For example, terpene resins, terpene phenol resins, phenol resins, aromatic hydrocarbon-modified terpene resins, and rosin Resin, modified rosin resin, aliphatic synthetic petroleum resin, aromatic synthetic petroleum resin, alicyclic synthetic petroleum resin, cumarone-indene resin, xylene resin, styrene resin, dicyclopentadiene resin, Among them, those having an unsaturated double bond capable of being hydrogenated include hydrogenated products thereof. These tackifying resins may be used alone or in combination of two or more.

When manufacturing the pressure-sensitive adhesive tape of the present embodiment, as a method of applying a pressure-sensitive adhesive applicable to the tape substrate to the tape substrate, a commonly used method, for example, a gravure coater method, a roll coater method, a reverse coater method, Doctor blade method, bar coater method, comma coater method, die coater method, lip coater method, knife coater method and the like can be mentioned. Of these, preferred are the die coater method and the comma coater method. After the coating, drying is performed by removing the solvent or the dispersion medium by heating with energy such as hot air, (near) infrared light, or high frequency.
In the pressure-sensitive adhesive tape of the present embodiment, the pressure-sensitive adhesive-coated surface of the tape substrate is determined depending on the type of the pressure-sensitive adhesive tape, and thus may be either the nonwoven fabric surface or the film surface.

[Release agent]
The release agent used for the tape base of the pressure-sensitive adhesive tape of the present embodiment is not particularly limited, and examples thereof include a silicone-based release agent, a long-chain alkyl-based release agent, a wax-based release agent, and a fluorine-based release agent.
When using a tape wound in a roll such that the reverse side (back side) of the adhesive is in contact with the adhesive applied surface, the peeling between the adhesive applied surface and the opposite surface is performed. (Deployment). In other words, when the tape is not used (during storage), the release agent that can maintain the adhesive strength firmly and reduce the adhesive strength during deployment using the tape to enable the work to be performed promptly is selected. You. When a release agent is applied to the film surface, it is preferable to perform corona discharge treatment in advance to ensure wettability and adhesion. If the film is a PE material, it does not require a release agent because it has releasability without corona discharge treatment.
As the release agent, one of the above release agents may be used alone, or two or more types may be used in combination. When the release agent has a functional group, a crosslinking agent that reacts with the functional group can be used. Examples of the crosslinking agent include a metal compound, an amino compound, an epoxy compound, and an isocyanate compound. In addition, a crosslinking agent can be used individually or in combination of 2 or more types. By performing the crosslinking, mainly the solvent resistance, the durability, the adhesion to the substrate and the like are improved. The coating amount of the release agent is preferably 0.01 to 10 g / ^{m 2} by dry weight, more preferably 0.05~8g / ^{m 2,} more preferably from 0.1 to 6 g / ^{m 2.}
The adhesive tape of the present embodiment is characterized in that the peeling force at a low speed is strong, the peeling force at a high speed used in a work site is low, and the workability is excellent.

  The adhesive force of the pressure-sensitive adhesive tape of the present embodiment is such that when used for architectural members, construction members, interior members, etc., it can be firmly adhered to an object, and when peeled, no adhesive remains on the peeled surface. It needs to be able to develop quickly. Therefore, the adhesive force to the SUS plate is preferably 0.5 N / 10 mm or more, more preferably 0.7 to 10 N / 10 mm, and particularly preferably 1.0 to 7 N / 10 mm. When the SUS adhesive strength is 0.5 N / 10 mm or less, the adhesive strength is weak, easily peeled off, and the workability and the like are reduced.

  The pressure-sensitive adhesive tape of the present embodiment needs to have excellent followability to a rough surface having irregularities and excellent flexibility. As a property showing the flexibility of the pressure-sensitive adhesive tape, a low intermediate stress during elongation is given. Therefore, the stress at the time of 5% elongation of the pressure-sensitive adhesive tape of the present embodiment is preferably 30 N / 10 mm or less, more preferably 2 N to 25 N / 10 mm, even more preferably 20 N / 10 mm or less, for example, 4 N to 20 N / 10 mm, and most preferably. Is 4N to 16N / 10mm. If the stress at 5% elongation exceeds 30 N / 10 mm, the texture becomes hard and the flexibility and the ability to follow a rough surface are reduced.

  Further, the pressure-sensitive adhesive tape of the present embodiment needs to have a strength that can be peeled off without tearing when the pressure-sensitive adhesive tape is peeled off. For example, the tensile strength of the pressure-sensitive adhesive tape is preferably 5 N / 10 mm or more, more preferably It is 7-100 N / 10mm, more preferably 10N-80N / 10mm.

  Furthermore, the elongation at break of the pressure-sensitive adhesive tape of the present embodiment is preferably 10% or more, more preferably 12 to 60%, and still more preferably 15 to 50%.

  Hereinafter, the present invention will be described more specifically based on examples, but they do not limit the scope of the present invention. The performance measurement results in Examples and Comparative Examples were obtained by measuring according to the following methods.

(1) Weight per unit area (g / m ² ): Measured according to JIS-L-1913.

(2) Thickness (mm): Measured according to JIS-L-1913A method.

(3) Fiber diameter (μm): Take a magnified photograph 500 times with a microscope, measure any 10 fibers, and show the average value.

(4) Rough surface followability 1 (when pasted)
A test piece having a width of 15 mm and a length of 300 mm was used. The adherend was a lysine spray-coated surface on which an aggregate having a main particle size of 2 to 3 mm was appropriately prescribed. The measurer determines the ease of application (ease of following) when applied so as to completely follow the adherend under the condition of 50% RH, and evaluates it according to the following evaluation criteria:
A: Very good B: Good C: Normal D: Bad.

(5) Rough surface followability 2 (after pasting, aging)
One hour after the application, the state of the test piece following the adherend is observed and evaluated according to the following evaluation criteria.
A: Very good, following the adherend without any change immediately after pasting B: There is almost no change immediately after pasting and following the adherend C: Test partially from the concave Specimen is raised D: The test piece is entirely raised from the concave portion.

(6) Removability The adherence of the adherend when the tape was peeled off after the tape was affixed to a SUS plate at 45 ° C. and 90% environment for 3 days after the tape was peeled off (adhesion derived from the tape remained on the SUS plate) The situation is evaluated according to the following criteria.
A: No adhesive residue or substrate breakage at all B: slight adhesive residue or substrate tear C: slight adhesive residue or substrate tear D: No adhesive residue or substrate tear at all.

(7) Coating parting A lysine spray-painted surface on which an aggregate having a main particle size of 0.5 to 1.0 mm is appropriately prescribed is used as an adherend, and is completely adhered to the adherend at a temperature of 23 ° C. and a humidity of 50% RH. After that, the same tape is further laminated on the back of the pasted tape, and left for 1 day under the above conditions. Then, paint is applied using a roller from above, and the first layer of tape is peeled off. The finish of the parting is evaluated according to the following evaluation criteria.
A: The parting is linear and very beautiful. B: The paint seeps out slightly. C: The paint seeps a little.
D: The bleeding of the paint is remarkable, and the parting is not linear.

(8) Hand-cutting / straight-cutting properties Ten subjects formed an adhesive tape roll in which an adhesive tape having a width of 50 mm and a length of 10 m was wound around a paper tube having an inner diameter of 3 inches, a thickness of 2 mm and a width of 50 mm, and FIG. Hold the point (a) of the roll shown in (1) with the thumb of the left hand, and hold the point (b) 50 mm from the point (a) with the thumb and forefinger of the right hand so that the point (a) becomes the fulcrum. Torn. The breaking state ((d) in FIG. 2) when tearing at five places (five times) is determined according to the following evaluation criteria. Answers are rated on a three-point scale and the average is shown. The values in Table 1 below are the sum of the evaluation of hand-cutting property and straight-line cutting property.
[Hand-cutting property]
3: Could be torn with weak force 2: Could be torn with strong force 1: Cannot be torn
[Linear cut property]
3: Length 45 mm or more in the width direction, torn linearly 2: Less than 45 mm in the width direction, torn linearly 1: Cannot be torn.

[Example 1]
[Preparation of tape base material]
A polyester long fiber web having a fiber diameter of 14 μm obtained by a spun bond method is deposited on a net conveyor, and thermocompression-bonded with a pair of embossing rolls, the basis weight of a partial thermocompression ratio of 20% is 30 g / m ² , and the thickness is 30%. A 170 μm polyester long fiber nonwoven fabric was obtained. Next, under the conditions of a temperature of 160 ° C. and a linear pressure of 300 N / cm, linear embossing is performed in the width direction of the tape (width 0.3 mm × emboss interval 3 mm, angle of the linear emboss is 0.2 to the roll rotation axis). Polyester long-fiber nonwoven fabric which has been subjected to (degree) is obtained. The obtained polyester long-fiber nonwoven fabric (corona-treated on the bonding surface) and a stretching ratio of 7 times, a thickness of 18 μm, and a resin composition of high-density polyethylene (100 parts) / low-density polyethylene (10 parts) in transverse uniaxial stretching high density The polyolefin film was extruded and laminated with a polyethylene resin having a thickness of 15 μm so that the width direction of the nonwoven fabric and the lateral direction of the film were aligned, and then a synthetic resin impregnation treatment was performed. The synthetic resin used was a water-based acrylic resin “Nipol LX874” manufactured by Zeon Corporation having a glass transition temperature of −31 ° C., and was subjected to immersion, dehydration and drying steps, and the resin amount after drying was 20 g / m ^2. Thus, a tape base material was obtained by performing impregnation treatment.
[Adhesive adjustment]
0.1 g of "Tetrad C manufactured by Mitsubishi Gas Chemical Co., Ltd." is added to 100 g of "Polysic 430SA manufactured by Sanyo Kasei Kogyo Co., Ltd.", and the mixture is sufficiently stirred. The solvent type has a solid content of 50% and a viscosity at 23 ° C. of 25000 mPa · s. An acrylic adhesive was obtained.
[Application of adhesive and release agent]
An adhesive is applied to the non-woven fabric surface of the tape base material so that the coated amount after drying is 40 g / m 2, and as a release agent, Peiroyl 1010 manufactured by Lion Specialty Chemicals Co., Ltd. is applied to the film surface after drying. The coating was performed so that the amount was 0.1 g / m ² , to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the characteristics of the nonwoven fabric, film, and tape base material.

[Example 2]
A thermoplastic long-fiber spunbond nonwoven fabric (with corona treatment) embossed in the width direction similar to that of Example 1 and a uniaxially stretched high-density polyolefin film are aligned with the width direction of the nonwoven fabric and the transverse direction of the film. Then, the resin was extruded and laminated with a polyethylene resin and adhered, and then the resin was impregnated. The synthetic resin used was a water-based acrylic resin “Nicazol FA-2555A” manufactured by Nippon Carbide Industry Co., Ltd. having a glass transition temperature of −17 ° C. The immersion, dehydration, and drying steps were performed, and the amount of the synthetic resin after drying was obtained. Was 30 g / m ² to obtain a tape base material.
[Application of adhesive and release agent]
The same adhesive as in Example 1 was applied to the nonwoven fabric surface, and the same release agent as in Example 1 was applied to the film surface to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, the film, and the tape substrate.

[Example 3]
Thermoplastic long-fiber spunbonded nonwoven fabric embossed in the width direction as in Example 1, a draw ratio of 10 times, a thickness of 18 μm, and a resin composition of high-density polyethylene (100 parts) / low-density polyethylene (10 parts) The laterally uniaxially stretched high-density polyolefin film of (1) was extruded and laminated with a 15 μm-thick polyethylene resin so that the width direction of the nonwoven fabric and the lateral direction of the film were aligned, and then the resin was impregnated. The synthetic resin used was a water-based acrylic resin “Nipol LX814” manufactured by Zeon Corporation having a glass transition temperature of 25 ° C. The immersion, dehydration, and drying steps were performed, and the amount of the synthetic resin after drying was 30 g / m 2. By performing impregnation treatment so as to obtain No. ² , a tape base material was obtained.
[Application of adhesive and release agent]
The same pressure-sensitive adhesive as in Example 1 was applied to the film surface of the above tape base material so that the coating amount after drying was 40 g / m ² , and the same release agent as in Example 1 “Lion Specialty” was applied to the nonwoven fabric surface Chemicals and Co. Piroiru 1010 "to give an adhesive tape was applied at 0.3 g / ^{m 2.}
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, the film, and the tape substrate.

[Example 4]
A thermoplastic long-fiber spunbonded nonwoven fabric embossed in the same width direction as in Example 1 and a uniaxially stretched high-density polyethylene film having a draw ratio of 10 times and a thickness of 18 μm were mixed with the width direction of the nonwoven fabric and the film. In the horizontal direction, a polyurethane resin manufactured by Sanyo Kasei Kogyo Co., Ltd. “Main agent: Polybond AY-651A, curing agent: Polybond AY-651C, diluent: ethyl acetate, compounding ratio (main agent: curing agent: diluent) = 100: 15. : 190) was applied at a resin adhesion amount of 5 g / m ² , bonded and dried at 70 ° C. for adhesion, and then impregnated with a synthetic resin. The synthetic resin used was a water-based acrylic resin “Nicazol FA-2555A” manufactured by Nippon Carbide Industry Co., Ltd. having a glass transition temperature of −17 ° C., and was immersed, dehydrated, and dried. to obtain a tape substrate by impregnating treated to be 40 g / m ^2.
[Application of adhesive and release agent]
The same adhesive as in Example 1 was applied to the nonwoven fabric surface, and the same release agent as in Example 1 was applied to the film surface to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, the film, and the tape substrate.

[Example 5]
A polyester long fiber web having a fiber diameter of 14 μm obtained by a spun bond method is deposited on a net conveyor, and thermocompression-bonded with a pair of embossing rolls, a basis weight of a partial thermocompression ratio of 20% is 30 g / m ² , and a thickness is 30%. A 170 μm polyester long fiber nonwoven fabric was obtained. Next, calendering is performed at a temperature of 150 ° C. and a pressure of 300 N / cm. Further, at a temperature of 160 ° C. and a linear pressure of 300 N / cm, a linear embossing process (width 0.3 mm × embossing) is performed in the tape width direction. A polyester long-fiber nonwoven fabric with an interval of 3 mm and a linear emboss angle of 0.2 degrees with respect to the roll rotation axis was obtained. The obtained polyester long-fiber nonwoven fabric (with a corona treatment on the adhesive surface) and the same transverse uniaxially stretched high-density polyethylene film as in Example 4 were combined with each other in the width direction of the nonwoven fabric and the transverse direction of the film to have a thickness of 15 μm. It was extruded and laminated with a polyethylene resin and bonded, and then impregnated with a synthetic resin. The synthetic resin used was a water-based acrylic resin “Nicazol FA-2555A” manufactured by Nippon Carbide Industry Co., Ltd. having a glass transition temperature of −17 ° C., and was immersed, dehydrated, and dried. A tape substrate was obtained by impregnating to 30 g / m ² .
[Application of adhesive and release agent]
The same adhesive as in Example 1 was applied to the nonwoven fabric surface, and the same release agent as in Example 1 was applied to the film surface to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, the film, and the tape substrate.

[Example 6]
A polypropylene fiber nonwoven fabric (S) having a fiber diameter of 18 μm and a basis weight of 11 g / m ² obtained by a spunbond method in the upper and lower layers, and a fiber diameter of 4 μm and a basis weight of 1 obtained by a meltblown method in two intermediate layers. A four-layer laminated web (SMMS) with 0.5 g / m ² of polypropylene ultra-fine fiber non-woven fabric (M) is thermo-compressed to form a multi-layer laminate having a partial thermo-compression ratio of 14%, a basis weight of 25 g / m ² , and a thickness of 240 μm. A long-fiber nonwoven fabric was obtained. Next, under the conditions of a temperature of 80 ° C. and a linear pressure of 300 N / cm, linear embossing is performed in the width direction of the tape (width 0.3 mm × emboss interval 3 mm, angle of the linear emboss is 0.2 to the roll rotation axis). ) To obtain a long-fiber nonwoven fabric. The obtained polypropylene long-fiber nonwoven fabric (with a corona treatment on the adhesive surface) and the same transverse uniaxially stretched high-density polyethylene film as in Example 4 were combined with each other in the width direction of the nonwoven fabric and the transverse direction of the film to have a thickness of 15 μm. It was extruded and laminated with a polyethylene resin and bonded, and then impregnated with a synthetic resin. The synthetic resin used was a water-based acrylic resin “Nicazol FA-2555A” manufactured by Nippon Carbide Industry Co., Ltd. having a glass transition temperature of −17 ° C., and was immersed, dehydrated, and dried. The tape base material was obtained by performing impregnation processing to 20 g / m ² .
[Application of adhesive and release agent]
The same adhesive as in Example 1 was applied to the nonwoven fabric surface, and the same release agent as in Example 1 was applied to the film surface to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, film, and tape base material.

[Example 7]
A tape base material was obtained in the same manner as in Example 5, except that a transverse uniaxially stretched high-density polyethylene film having a stretch ratio of 10 and a thickness of 20 µm was used.
[Adhesive adjustment]
After dissolving 100 g of natural rubber whose Mooney viscosity has been adjusted to 60 by mastication in 830 g of toluene, 50 g of YS Resin PX1000 (manufactured by Yashara Chemical Co.), 20 g of Daimaron (manufactured by Yashara Chemical Co.), and antiaging agent Antage W-400 (Kawaguchi) 1 g was added and dissolved sufficiently to obtain an adhesive having a solid content of 17% and a viscosity at 23 ° C. of 9800 mPa · s.
[Application of adhesive and release agent]
The same adhesive as in Example 1 was applied to the nonwoven fabric surface, and the same release agent as in Example 1 was applied to the film surface to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, film, and tape base material.

Example 8
Extruding and laminating a thermoplastic long fiber spunbonded nonwoven fabric embossed in the width direction similar to that of Example 5 and a uniaxially stretched high-density polyethylene film similar to that of Example 5 with the same polyethylene resin as that of Example 5. Then, impregnation with a synthetic resin was performed. The synthetic resin used was a water-based acrylic resin “Nicazol FA-2555A” manufactured by Nippon Carbide Industry Co., Ltd. having a glass transition temperature of −17 ° C., and was immersed, dehydrated, and dried. The tape base material was obtained by performing impregnation processing to 20 g / m ² .
[Application of adhesive and release agent]
The same adhesive as in Example 1 was applied to the nonwoven fabric surface, and the same release agent as in Example 1 was applied to the film surface to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, the film, and the tape substrate.

[Comparative Example 1]
A polyester long fiber web having a fiber diameter of 14 μm obtained by a spun bond method is deposited on a net conveyor, and thermocompression-bonded with a pair of embossing rolls, a basis weight of a partial thermocompression ratio of 20% is 30 g / m ² , and a thickness is 30%. A 170 μm polyester long fiber nonwoven fabric was obtained. Next, under the conditions of a temperature of 160 ° C. and a linear pressure of 300 N / cm, linear embossing is performed in the width direction of the tape (width 0.3 mm × emboss interval 3 mm, angle of the linear emboss is 0.2 to the roll rotation axis). Polyester long-fiber nonwoven fabric which has been subjected to (degree) is obtained. Next, a synthetic resin impregnation treatment was performed. The synthetic resin used was a water-based acrylic resin “Nicazol FA-2555A” manufactured by Nippon Carbide Industry Co., Ltd. having a glass transition temperature of −17 ° C., and was immersed, dehydrated, and dried. By impregnating to 30 g / m ² , and applying “NIPOL LX430” manufactured by Nippon Zeon Co., Ltd. having a glass transition temperature of 12 ° C. to one side such that the coating amount after drying is 5 g / m ^2. A tape substrate was obtained.
Next, the same pressure-sensitive adhesive as in Example 1 was applied to the nonwoven fabric surface, and the opposite side (one side) was used as a release agent, and Peiroyl 1010 manufactured by Lion Specialty Chemicals Co., Ltd. was applied in an amount of 0.3 g / dry. and m ^2, and the coating was obtained an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the characteristics of the nonwoven fabric and the base fabric for tape.

[Comparative Example 2]
The same pressure-sensitive adhesive as that of Comparative Example 1 was applied to one side of a transversely uniaxially stretched high-density polyethylene film having a draw ratio of 10 and a thickness of 18 μm so that the coating amount after drying was 40 g / m ² , and a release agent was applied to the other side. Was applied so that the applied amount after drying was 0.1 g / m ² , which was an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the characteristics of the film and the tape base material.

[Comparative Example 3]
A polyester long fiber web having a fiber diameter of 14 μm obtained by a spun bond method is deposited on a net conveyor, and thermocompression-bonded with a pair of embossing rolls, a basis weight of a partial thermocompression ratio of 12% is 12 g / m ² , and a thickness is 12 g / m ² . A 90 μm polyester long fiber nonwoven fabric was obtained. In addition, the obtained nonwoven fabric is not subjected to linear or broken line embossing in the width direction. The obtained nonwoven fabric and a uniaxially stretched high-density polyethylene film having a draw ratio of 10 times and a thickness of 18 μm are extruded and laminated with a polyethylene resin having a thickness of 15 μm so that the width direction of the nonwoven fabric and the transverse direction of the film are aligned. Then, a tape base material was obtained. Next, the same pressure-sensitive adhesive as in Comparative Example 1 was applied to the nonwoven fabric surface so that the coating amount after drying was 40 g / m ² , and as a release agent, Piloyl 1010 manufactured by Lion Specialty Chemicals Co., Ltd. was used after drying. The composition was applied to the film surface so that the application amount was 0.1 g / m ² , to obtain an adhesive tape.
The evaluation results of the obtained pressure-sensitive adhesive tape are shown in Table 1 below together with the properties of the nonwoven fabric, the film, and the tape substrate.

  The pressure-sensitive adhesive tape of the present invention is excellent in hand-cutting properties and straight-line cutting properties, has a good tape-over property because it has a smooth tape surface, has no delamination, and has a curved surface, a rough surface, and a conformity to an uneven surface, In addition, since it has excellent water resistance and has little tape breakage when peeled off after application, it can be suitably used as a masking tape, especially a masking tape for rough coating, a tape for curing, etc. used by sticking to a rough surface. .

(A) Location to be pressed by thumb (b) Location to be held by thumb and index finger (c) Direction of tearing (d) Breaking state when torn

Claims (4)

  A thermoplastic uniaxially stretched thermoplastic resin film is bonded to a thermoplastic long-fiber spunbonded nonwoven fabric that has been subjected to embossing in a linear or broken line in the width direction, with the width direction of the nonwoven fabric aligned with the transverse direction of the film. Adhesive tape consisting of a tape base. The basis weight of the thermoplastic long-fiber spunbond nonwoven fabric is 15 to 60 g / m ² , the horizontal uniaxially stretched thermoplastic resin film is a horizontal uniaxially stretched polyethylene film, and the nonwoven fabric has a glass transition temperature of 25 ° C. or less. 2. The pressure-sensitive adhesive tape according to claim 1, wherein the synthetic resin is impregnated with the synthetic resin in an amount of 5 to 150 wt% based on a basis weight of the nonwoven fabric after drying.   The pressure-sensitive adhesive tape according to claim 1, wherein an adhesive is applied to a nonwoven fabric surface of the tape base material, and a release agent is applied to a film surface.   The pressure-sensitive adhesive tape according to any one of claims 1 to 3, wherein the horizontal uniaxially stretched thermoplastic resin film is a horizontal uniaxially stretched film of high-density polyethylene alone or a mixture of high-density polyethylene and low-density polyethylene.

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