Adhesive cleaner

Abstract

This adhesive cleaner is provided with an adhesive tape. The adhesive tape forms a roll body that is wound so as to have a surface layer part thereof facing outward. The roll body is configured to roll while bringing the surface layer part into contact with a cleaning target. The surface layer part comprises an adhesive section having an adhesive surface, and a plurality of ridge sections that protrude radially outward of the roll body from the adhesive surface. The plurality of ridge sections are disposed apart from each other and extend along the same direction. Each of the ridge sections has a width of 0.4-2 mm, and the number of the ridge sections per 10 mm width is 0.5-4.

Description

Adhesive cleaner CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority from Japanese Patent Application No. 2023-187774, the disclosure of which is incorporated herein by reference.

[0002] The present invention relates to an adhesive cleaner.

[0003] Conventionally, adhesive cleaners equipped with adhesive tape have been used as cleaning means for flooring, carpets, and the like. Known adhesive cleaners include an adhesive tape having a strip-shaped substrate and an adhesive surface formed only on one side of the substrate, wound into a roll with the adhesive surface of the tape facing outward. With such adhesive cleaners, foreign matter on the object to be cleaned, such as a floor, can be attached to the adhesive surface by rolling the roll over the object. Furthermore, if the adhesive strength of the adhesive surface is reduced due to the capture of foreign matter, the used outermost portion of the roll can be cut off to expose a new adhesive surface (see, for example, Patent Document 1).

[0004] Japanese Patent Publication No. 2018-745

[0005] This type of adhesive cleaner requires smooth running performance for the roll body to roll smoothly over the cleaning target, such as a floor, and the adhesive surface to capture foreign matter on the cleaning target. However, if the cleaner is made to run easily over a cleaning target having a relatively smooth surface with few irregularities, such as flooring, there is a problem that foreign matter cannot be sufficiently captured on a cleaning target having a highly irregular surface, such as carpet or rug. This is thought to be due to the fact that if the adhesive strength of the adhesive tape is made too weak in an attempt to improve running performance on flooring, the adhesive strength falls below the adhesive strength required for capturing the carpet or rug. On the other hand, if the adhesive strength of the adhesive tape is made too strong in an attempt to improve capturing performance on carpet or rug, there is a problem that the adhesive tape is more likely to stick to flooring, which can reduce running performance.

[0006] In view of the above problems, the present invention aims to provide an adhesive cleaner that has excellent running properties on relatively smooth surfaces with few irregularities, such as flooring, and also has excellent foreign matter capturing properties on relatively uneven surfaces, such as carpets.

[0007] The adhesive cleaner of the present invention comprises an adhesive tape, the adhesive tape being wound to form a roll body with the surface layer facing outward, the roll body being configured to roll with the surface layer in contact with the object to be cleaned, the surface layer having an adhesive portion with an adhesive surface and a plurality of ridge portions protruding radially outward from the adhesive surface of the roll body, the plurality of ridge portions extending in the same direction while being spaced apart from one another, the width of each ridge portion being 0.4 mm or more and 2 mm or less, and the number of ridge portions per 10 mm width being 0.5 or more and 4 or less.

[0008] The adhesive cleaner of the present invention solves the above problems by having wider ridges and wider spacing between them than conventional ones. That is, the adhesive cleaner of the present invention has ridges that can separate the adhesive surface from the object to be cleaned that are 0.4 mm or more in width and 0.5 or more in number, thereby providing excellent running performance on relatively smooth surfaces with few irregularities, such as flooring. Furthermore, having ridges that are 2 mm or less in width and 4 or less in number makes it easier for the adhesive surface to come into contact with relatively uneven surfaces, such as carpets, and therefore provides excellent capture performance on such surfaces.

[0009] In an adhesive cleaner according to one aspect of the present invention, the adhesive portion has a hardness equal to or less than the hardness of the protrusion portion.

[0010] With this configuration, foreign matter is more likely to sink into the adhesive portion than in an embodiment in which the hardness of the adhesive portion is greater than the hardness of the protrusion portion, thereby preventing the foreign matter from falling off after being captured.

[0011] In an adhesive cleaner according to one aspect of the present invention, the surface layer of the roll body has a hardness of 70 or less as measured by an Asker C-type hardness tester.

[0012] According to this configuration, the Asker C hardness of the surface layer of the roll body is 70 or less, which improves the cushioning properties of the roll body and enables foreign matter to be captured by sinking into the surface layer. Furthermore, foreign matter captured in this way is less likely to fall off from the surface layer, which saves the effort of re-cleaning.

[0013] In an adhesive cleaner according to one aspect of the present invention, the protrusions protrude radially outward from the adhesive surface by 20 μm or more.

[0014] According to this configuration, the protrusion length from the adhesive surface of the protrusion portion is 20 μm or more, which prevents the adhesive surface from sticking to smooth surfaces such as flooring, allowing the roll body to run more smoothly.

[0015] In one aspect of the adhesive cleaner of the present invention, the adhesive portion is composed of a plurality of linear portions that extend in the same direction as the protrusion portions while being spaced apart from each other, and the plurality of protrusion portions are formed on each linear portion, and adjacent protrusion portions are separated by at least the spacing between the plurality of linear portions.

[0016] According to this configuration, the adhesive portion is composed of multiple linear portions spaced apart, which makes it easier for the roll to run on a smooth surface compared to an embodiment in which the adhesive portion extends continuously in the surface direction. Furthermore, since adjacent protrusions are spaced apart by the distance between them, the adhesive surface is more easily exposed. Although the adhesive surface area is relatively small due to the spacing between the adhesive portions, the adhesive surface is more likely to come into contact with the surface of a carpet or the like. In other words, foreign matter can be efficiently captured on a carpet or the like.

[0017] In the adhesive cleaner according to one aspect of the present invention, the adhesive portion is made of a hot melt adhesive.

[0018] According to this configuration, the adhesive portion is made of a hot melt adhesive, which provides excellent running properties and capturing properties.

[0019] As described above, according to the present invention, an adhesive cleaner can be provided that has excellent running properties on relatively smooth surfaces with few irregularities, such as flooring, and also has excellent foreign matter capturing properties on relatively uneven surfaces, such as carpet.

[0020] Fig. 3 is a front view of an adhesive cleaner according to one embodiment of the present invention. Fig. 4 is a side view of the adhesive cleaner of Fig. 1. Fig. 5 shows an adhesive tape provided in the adhesive cleaner of Fig. 1, with a part of the rolled adhesive tape pulled out. Fig. 6 is a cross-sectional view of the adhesive tape of Fig. 3. Fig. 7 is a cross-sectional view of an adhesive tape according to a modified example. Fig. 8 is a schematic view of a load-displacement curve of an adhesive portion 211 or a protrusion portion 212.

[0021] Hereinafter, an adhesive cleaner according to one embodiment of the present invention will be described with reference to the drawings.

[0022] As shown in Figures 1 and 2, the adhesive cleaner 1 of this embodiment includes a rod-shaped roll member 10 that can rotate around an axis, adhesive tape 20 formed into a cylindrical roll body 20r that has an insertion hole for inserting the roll member 10, a shaft member 30 that supports the roll member 10 so as to rotate the roll member 10 around its axis, and a grip member 40 connected to the end of the shaft member 30 opposite the part that supports the roll member 10.

[0023] In the adhesive cleaner 1 of this embodiment, the roll member 10 is cylindrical with an outer circumferential surface that supports the inner circumferential surface of the roll body 20r, and is configured to be rotatable about its axis while supporting the roll body 20r. The adhesive tape 20 includes a surface layer 21 having an adhesive surface that contacts the object to be cleaned, and is wound with the adhesive surface facing outward to form the roll body 20r. The shaft member 30 is formed by bending a single metal rod at a predetermined location. Specifically, the shaft member 30 includes a roller support shaft inserted into the roll member 10 and an operating shaft 31 that extends from the roller support shaft to the outside of the roll member 10 and along the radial direction of the roll member 10. The grip member 40 is the portion that is gripped by the user and is joined to the end of the shaft member 30 on the operating shaft 31 side. With this configuration, when a user of the adhesive cleaner 1 moves the shaft member 30 in a direction perpendicular to the rotation axis of the roll member 10 while the adhesive surface of the roll body 20r is in contact with the object to be cleaned, the frictional force generated between the adhesive surface and the object to be cleaned, which acts along the circumferential direction of the roll body 20r, allows the roll body 20r to roll over the object to be cleaned.

[0024] Next, the pressure-sensitive adhesive tape 20 of this embodiment will be described in detail with reference to Figures 3 and 4. The pressure-sensitive adhesive tape 20 is in a strip shape that can form a roll 20r. Hereinafter, with regard to the directions of the pressure-sensitive adhesive tape 20 unwound from the roll 20r along a single plane, a first direction, which is the direction of unwound from the roll 20r among the surface directions of the pressure-sensitive adhesive tape 20, will be referred to as the length direction D1, a second direction, which is the direction of unwound from the roll 20r among the surface directions and is orthogonal to the length direction D1, will be referred to as the width direction D2, and a third direction, which is orthogonal to both the length direction D1 and the width direction D2, will be referred to as the thickness direction D3. Furthermore, the direction around the winding axis of the roll 20r will be referred to as the circumferential direction.

[0025] 3, the adhesive tape 20 has a plurality of tear lines 23 extending along the width direction D2 at predetermined positions in the length direction D1. The plurality of tear lines 23 are formed at predetermined intervals in the length direction D1 so as to separate the outermost peripheral portion of the roll body 20r, the adhesive strength of which decreases with use. In this embodiment, the tear lines 23 are formed by perforations, but are not limited to this and may be formed by any known means.

[0026] 4, the adhesive tape 20 includes a surface layer 21 having an adhesive surface, and a substrate 22 on which the surface layer 21 is laminated. The surface layer 21 is formed on only one surface of the substrate 22. Hereinafter, with regard to the surfaces of the adhesive tape 20 itself and each layer of the adhesive tape 20, the surface that faces radially outward when the roll body 20r is formed will be referred to as the front surface, and the surface that faces radially inward will be referred to as the back surface.

[0027] The surface layer 21 of this embodiment is laminated on the substrate 22 while exposing the surfaces of both side edge portions in the width direction D2 of the substrate 22 (both side edge portions extending along the length direction D1). In other words, the pressure-sensitive adhesive tape 20 of this embodiment comprises a pair of non-adhesive portions 24 (dry edges) constituted by the exposed surfaces of both side edge portions of the substrate 22, and a surface layer 21 formed between the pair of non-adhesive portions 24. The width of each of the non-adhesive portions 24 may be 1 mm to 20 mm, or 3 mm to 15 mm.

[0028] The surface layer 21 has an adhesive portion 211 laminated on the surface of the base material 22, and a plurality of protrusions 212 having weaker adhesive strength than the adhesive portion 211 and protruding from the surface of the adhesive portion 211 along the thickness direction D3.

[0029] The adhesive portion 211 of this embodiment is continuous without interruption in the width direction D2. As a result, the adhesive portion 211 of this embodiment has a pair of side surfaces in the width direction D2 and a width W that is the length between these side surfaces.

[0030] The plurality of protrusions 212 extend along one direction in the surface direction of the adhesive tape 20 and are formed at predetermined intervals in a direction perpendicular to the one direction. More specifically, the plurality of protrusions 212 extend along the length direction D1 and are formed at intervals d in the width direction D2. In the roll body 20r, the plurality of protrusions 212 protrude radially outward.

[0031] In this embodiment, the protrusion 212 has a rectangular cross section perpendicular to the length direction D1 and has a long, narrow strip shape when viewed from one side in the thickness direction D3. However, the present invention is not limited to this, and the protrusion 212 may have a trapezoidal shape tapering toward the tip end surface, or the tip end surface may be rounded.

[0032] The adhesive portion 211 and the plurality of protrusions 212 described above provide the surface layer 21 with a plurality of first contact surfaces 21a, which are strong adhesive surfaces that are the exposed surfaces of the adhesive portion 211, and a plurality of second contact surfaces 21b, which are weak adhesive surfaces that are the tip surfaces of the protrusions 212. The first contact surfaces 21a and the second contact surfaces 21b can be surfaces that come into contact with the cleaning target during use. More specifically, the first contact surface 21a of the adhesive portion 211 primarily comes into contact with the cleaning target having a highly uneven surface, such as a carpet or rug, and contributes to capturing foreign matter adhering thereto. The second contact surface 21b of the protrusions 212 primarily comes into contact with the cleaning target having a smooth surface with little unevenness, such as hardwood flooring, and contributes to capturing foreign matter adhering thereto.

[0033] The adhesive portion 211 has a thickness of 20 μm or more. Such an adhesive cleaner 1 can capture foreign matter by allowing it to sink deeply into the adhesive portion 211, thereby preventing the foreign matter from falling off after capture. The thickness of the adhesive portion 211 is preferably 30 μm or more, and more preferably 40 μm or more. On the other hand, the thickness of the adhesive portion 211 is preferably 100 μm or less, and may be 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, or even 50 μm. The thickness of the adhesive portion 211 is calculated by enlarging and observing the cross section of a portion pulled out along a plane from the roll body 20r using a microscope or the like, measuring the thickness at any 10 locations, and averaging the measured values.

[0034] Each protrusion 212 has a weaker adhesive force than the adhesive portion 211 and is configured to exhibit a hardness equal to or greater than that of the adhesive portion 211. In this embodiment, each protrusion 212 is configured to exhibit a harder hardness than the adhesive portion 211, specifically, a hardness of 0.04 MPa or greater. The hardness of the adhesive portion 211 and the protrusion 212 is measured by nanoindentation in accordance with ISO 14577. The load-displacement curve obtained by nanoindentation shown in FIG. 6 includes a loading curve showing the relationship between the displacement of the sample and the load of the indenter when the indenter is pressed to a predetermined depth into the sample, and an unloading curve showing the relationship between the displacement of the sample and the load of the indenter when the indenter is withdrawn from the predetermined depth. Regarding the specific measurement conditions for obtaining such a load-displacement curve, a "TI950 TriboIndenter" (manufactured by Hysitron) was used as a measuring device. The indenter used is a spherical conical indenter with a radius of curvature of 10 μm. The indenter has a pressing depth of 3.5 μm, a pressing speed of 5000 nm / sec, and a pulling speed of 5000 nm / sec. The measurement temperature is 25°C. Three measurements are carried out, and the average value is used. The hardness is measured by pressing the indenter to a predetermined depth h Ｐｍａｘ The load when pressed down to the maximum load P ｍａｘ Let's say h Ｐｍａｘ When the cross-sectional area of ​​the indenter at the contact depth with the sample at the time of arrival is defined as the contact projected area A, P ｍａｘ / A.

[0035] In the roll body 20r, the protrusions 212 overlap in the radial direction (from the innermost to the outermost circumference of the roll body 20r), forming multiple wound sections extending radially. Furthermore, multiple wound sections are formed at intervals in the width direction D2 of the roll body 20r. Due to the overlap of the hard protrusions 212, the wound sections of this embodiment exhibit significantly greater hardness than wound sections formed by the adhesive portions 211. Furthermore, the wound sections formed by these protrusions 212 have excellent resistance to pressure from above while the roll body 20r is running, and are less likely to deform. Due to this action, in this embodiment, the protrusions 212 can easily fully perform their functions.

[0036] The hardness of the surface layer 21 of the roll body 20r, as measured by an Asker C-type hardness tester, is 70 or less, and more preferably 60 or less. This improves the cushioning properties of the roll body 20r, allowing foreign matter to sink into the surface layer 21 and be captured. Furthermore, foreign matter captured in this manner is less likely to fall off the surface layer 21, thereby eliminating the need for re-cleaning. On the other hand, the hardness is preferably 40 or more. Note that the hardness here refers to a value measured by using a roll body formed by laminating 30 turns of the adhesive tape 20 as a sample and pressing a pusher needle against any part of the sample.

[0037] The protrusion height of the plurality of protrusions 212 from the first contact surface 21a (strong adhesive surface) (i.e., the thickness of the protrusions 212) is 40 μm or more, preferably 50 μm or more, more preferably 60 μm or more, even more preferably 70 μm or more, and even more preferably 80 μm or more. Meanwhile, the protrusion height of the plurality of protrusions 212 is preferably 150 μm or less, and may be 140 μm or less, 130 μm or less, 120 μm or less, 110 μm or less, or 100 μm or less. The thickness of the plurality of protrusions 212 is calculated by magnifying and observing the cross section of a portion pulled out along a plane from the roll body 20r using a microscope or the like, measuring any 10 protrusions, and averaging the measurements.

[0038] The protrusion height of each protrusion 212 from the first contact surface 21a (the thickness of the protrusion 212) is preferably greater than the thickness of the adhesive portion 211. For example, the protrusion height of each protrusion 212 is preferably 1.5 times or more, and more preferably 2 times or more, the thickness of the adhesive portion 211. This makes it possible to prevent the adhesive portion 211 from sticking to a relatively flat surface such as flooring. On the other hand, the protrusion height of the multiple protrusions 212 is preferably 5 times or less, and more preferably 3 times or less, the thickness of the adhesive portion 211. This makes it easier for the first contact surface 21a of the adhesive portion 211 to come into contact with the cleaning target such as a carpet, allowing the adhesive portion 211 to fully exhibit its function of capturing foreign matter.

[0039] Depending on the thickness of the adhesive portion 211 and the protruding height of the plurality of protrusions 212 as described above, the protruding height of the surface layer 21 from the surface of the base material 22 (i.e., the distance from the surface of the base material 22 to the tip of the protrusion 212) can be 70 μm or more, 80 μm or more, 90 μm or more, 100 μm or more, 110 μm or more, or 120 μm or more. This increases the total thickness of the portion made of adhesive, thereby strengthening the adhesive force and improving the ability to capture foreign matter.

[0040] The width w1 of each first contact surface 21a (corresponding to the distance d in this embodiment) is preferably equal to or greater than the width of the second contact surface 21b, preferably 1.5 times or more, and more preferably 2 times or more. More specifically, the width of each first contact surface 21a is preferably 0.5 mm or more, and more preferably 1 mm or more. This improves the ability to capture foreign matter on surfaces such as carpet. Meanwhile, the width of each first contact surface 21a is preferably 10 times or less, more preferably 8 times or less, and even more preferably 6 times or less, the width of the second contact surface 21b. More specifically, the width of the first contact surface 21a is preferably 10 mm or less, more preferably 5 mm or less, and even more preferably 3 mm or less. This improves the running performance on surfaces such as flooring.

[0041] Furthermore, when each protrusion 212 is viewed from one side in the thickness direction D3, the width of the second contact surface 21b is 0.4 mm or more, and more preferably 0.8 mm or more. Having a width of 0.4 mm or more on the second contact surface 21b provides excellent running performance on surfaces such as flooring. Additionally, in the roll body 20r, the leading end surface of the protrusion 212 on the nth turn and the leading end surface of the protrusion 212 on the n+1th turn can easily overlap in the radial direction, thereby achieving the desired hardness for the wound portion formed by the protrusions 212 and suppressing unwinding of the roll body 20r. The width of the second contact surface 21b is preferably 2 mm or less, and more preferably 1.5 mm or less. Having a width of 2 mm or less on the second contact surface 21b facilitates capturing foreign matter adhering to surfaces such as flooring.

[0042] The first contact surface 21a and the second contact surface 21b of the nth turn of the roll body 20r are surfaces that can come into contact with the back surface of the n+1th turn (i.e., the back surface of the substrate 22). This contact of the front surface of the nth turn with the back surface of the n+1th turn prevents the roll body 20r from unwinding when not in use (unwinding) and the outer circumferential surface of the roll body 20r from sequentially adhering to the cleaning target (rail drag). In this embodiment, the adhesive strength of the adhesive portion 211 is relatively strong to capture foreign matter on the surface of a carpet, etc. This may prevent the first contact surface 21a from peeling from the back surface of the substrate 22, making it difficult to unwind the roll body 20r. In contrast, in this embodiment, the protrusions 212, which have a width of 0.4 mm or more and a protruding height of 40 μm or more, sufficiently prevent the first contact surface 21a from adhering to the back surface of the substrate 22, making it easy to unwind the roll body 20r despite the strong adhesive strength of the adhesive portion 211.

[0043] The first composition (adhesive composition) constituting the adhesive portion 211 contains at least a polymer, a tackifier, and a plasticizer.

[0044] Examples of adhesives that can be used to form the adhesive portion 211 include acrylic adhesives, rubber adhesives, polyester adhesives, urethane adhesives, polyether adhesives, and silicone adhesives. Here, an acrylic adhesive refers to an adhesive containing an acrylic polymer as a base polymer. The same applies to other adhesives. In this specification, the base polymer refers to the main component (the component with the highest blending ratio) among the polymer components. The mass ratio of the base polymer to the total mass of the adhesive is 50% by mass or more, preferably 70% by mass or more, and more preferably 90% by mass or more. On the other hand, the mass ratio of the base polymer may be 100% by mass or less, or may be 99% by mass or less. To obtain the adhesive portion 211 with a predetermined hardness, an acrylic adhesive or a rubber adhesive is preferred, and a rubber adhesive is more preferred.

[0045] The acrylic pressure-sensitive adhesive contains an acrylic polymer as a base polymer. The acrylic polymer is a polymer whose main component is an acrylic monomer having at least one (meth)acryloyl group. The acrylic polymer may be a homopolymer or a copolymer. The mass ratio of the acrylic monomer to the total mass of the acrylic polymer is 50% by mass or more, preferably 70% by mass or more, and more preferably 90% by mass or more. In this specification, the term "(meth)acryloyl group" refers to an acryloyl group and a methacryloyl group inclusively, and similarly, the term "(meth)acrylate" refers to an acrylate and a methacrylate inclusively.

[0046] The rubber-based pressure-sensitive adhesive contains, as a base polymer, one or more rubber-based polymers selected from natural rubber-based polymers such as natural rubber and modified natural rubber, isoprene rubber, chloroprene rubber, styrene-isoprene-styrene block copolymers such as styrene-butadiene-styrene block copolymer (SIS), styrene-ethylene / butylene-styrene block copolymer (SBS), and styrene-ethylene / butylene-styrene block copolymer (SEBS), and olefin-based block copolymers such as crystalline polyolefin-ethylene / butylene-crystalline polyolefin block copolymer (CEBC), and styrene-ethylene / butylene-crystalline polyolefin block copolymer (SEBC). The rubber-based pressure-sensitive adhesive preferably contains a styrene-based block copolymer, and more preferably contains a styrene-isoprene-styrene block copolymer (SIS).

[0047] The tackifier contains one or more selected from various tackifying resins such as rosin-based, terpene-based, hydrocarbon-based, epoxy-based, polyamide-based, elastomer-based, phenol-based, ketone-based, etc. The amount of tackifier blended per 100 parts by mass of the base polymer of the PSA is, for example, 50 to 200 parts by mass, and preferably 80 to 150 parts by mass.

[0048] The plasticizer in the adhesive portion 211 contains one or more types selected from process oils such as paraffinic, naphthenic, and aromatic process oils. To obtain an adhesive portion 211 with a predetermined hardness, the amount of plasticizer blended per 100 parts by mass of the adhesive base polymer is, for example, preferably 50 parts by mass or more, more preferably 80 parts by mass or more, and even more preferably 90 parts by mass or more. On the other hand, the amount of plasticizer blended is preferably 200 parts by mass or less, more preferably 150 parts by mass or less. This makes it possible to suppress changes in the hardness of the adhesive portion 211 due to bleeding of the plasticizer during storage, etc.

[0049] The first composition (adhesive composition) constituting the adhesive portion 211 may contain, in addition to the above, various additives such as an anti-aging agent, an antioxidant, an ultraviolet absorber, a light stabilizer, an antistatic agent, a lubricant, and a colorant.

[0050] The hardness of the adhesive portion 211 can be reduced by increasing the amount of components in the first composition that are liquid at room temperature (25° C.) Examples of such components include plasticizers.

[0051] The adhesive portion 211 of this embodiment is formed to be transparent so that the user can see the color of the surface of the base material 22 .

[0052] The second composition constituting the protrusion 212 contains at least a polymer different from the polymer contained in the first composition (adhesive composition) of the adhesive portion 211, a filler, and a plasticizer.

[0053] Examples of the polymer for the protrusion 212 include one or more of polyolefins such as polyethylene (PE), polypropylene (PP), and ethylene-propylene copolymers; ethylene-vinyl acetate copolymers (EVA); acrylic block copolymers; polyvinyl chloride; polyesters such as PET; polyurethanes; polyimides; polyamides; and polycarbonates. Thus, the polymer of the second composition is harder than the first composition in the adhesive portion 211.

[0054] The second composition of this embodiment contains a polyolefin and an acrylic block copolymer. The second composition preferably contains more acrylic block copolymer than polyolefin. Specifically, the mass ratio of the acrylic block copolymer to the mass of the polyolefin is preferably 2 to 10, and more preferably 3 to 7.

[0055] The acrylic block copolymer is an AB or ABA type copolymer having a hard block and a soft block.

[0056] Examples of monomers constituting the hard blocks include alkyl methacrylates having an alkyl group having 1 to 20 carbon atoms. Examples of such alkyl methacrylates include methyl methacrylate (MMA), ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, n-pentyl methacrylate, n-hexyl methacrylate, n-heptyl methacrylate, n-octyl methacrylate, isooctyl methacrylate, 2-ethylhexyl methacrylate, n-nonyl methacrylate, isononyl methacrylate, decyl methacrylate, lauryl methacrylate, and stearyl methacrylate. These may be used in combination of one or more, but MMA alone is preferred.

[0057] Examples of monomers constituting the soft block include alkyl acrylates having an alkyl group having 1 to 20 carbon atoms. Examples of such alkyl acrylates include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate (BA), isobutyl acrylate, tert-butyl acrylate, n-pentyl acrylate, n-hexyl acrylate, n-heptyl acrylate, n-octyl acrylate, isooctyl acrylate (IOA), 2-ethylhexyl acrylate (2EHA), n-nonyl acrylate, isononyl acrylate (INA), decyl acrylate, lauryl acrylate, and stearyl acrylate. These may be used in combination of one or more types; for example, a combination of n-butyl acrylate (BA) and 2-ethylhexyl acrylate (2EHA) is preferred.

[0058] The mass ratio of the hard block to the total mass of the acrylic block copolymer is preferably from 10 to 35 mass %, more preferably from 15 to 25 mass %.

[0059] Examples of the filler include carbonates such as calcium carbonate, sodium carbonate, and sodium hydrogencarbonate; metal oxides such as titanium oxide, silica, alumina, zirconia, zinc oxide, tin oxide, copper oxide, and nickel oxide; metal hydroxides such as aluminum hydroxide, boehmite, talc, magnesium hydroxide, calcium hydroxide, zinc hydroxide, silicic acid, iron hydroxide, copper hydroxide, barium hydroxide, zirconium oxide hydrate, tin oxide hydrate, basic magnesium carbonate, hydrotalcite, dawsonite, borax, and zinc borate; Examples of the inorganic materials include hydrated metal compounds, carbides such as silicon carbide, boron carbide, nitrogen carbide, and calcium carbide, nitrides such as aluminum nitride, silicon nitride, boron nitride, and gallium nitride, titanates such as barium titanate and potassium titanate, carbonaceous materials such as carbon black, carbon tubes (carbon nanotubes), carbon fiber, and diamond, and glass. Metals such as copper, silver, gold, platinum, nickel, aluminum, chromium, iron, and stainless steel, and particles of natural materials such as volcanic ash, clay, and sand can be used in combination of one or more of these.

[0060] In order to obtain the protrusion 212 having a predetermined hardness, the amount of filler to be blended is preferably 50 to 100 parts by mass, more preferably 70 to 90 parts by mass, and even more preferably 75 to 85 parts by mass, per 100 parts by mass of the polymer of the protrusion 212 (for example, the polyolefin and the acrylic block copolymer).

[0061] Examples of plasticizers include oligomers such as acrylic oligomers, phthalates such as dioctyl phthalate, diisononyl phthalate, diisodecyl phthalate, and dibutyl phthalate; adipic acid esters such as dioctyl adipate and diisononyl adipate; trimellitic acid esters such as trioctyl trimellitate; sebacic acid esters; epoxidized vegetable oils such as epoxidized soybean oil and epoxidized linseed oil; epoxidized fatty acid alkyl esters such as epoxidized fatty acid octyl esters; cyclic fatty acid esters or derivatives thereof such as sorbitan monolaurate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, and ethylene oxide adducts thereof, and process oils. These may be used in combination of one or more. Among these, acrylic oligomers are preferred, and non-functional acrylic oligomers that do not have functional groups such as hydroxyl groups are more preferred.

[0062] The amount of plasticizer blended is preferably 10 to 50 parts by mass, more preferably 20 to 40 parts by mass, and even more preferably 30 to 40 parts by mass, per 100 parts by mass of the polymer of the protrusion portion 212 (for example, the polyolefin and the acrylic block copolymer).

[0063] The second composition constituting the protrusion 212 may contain, in addition to the above, various additives such as an antioxidant, an antioxidant, an ultraviolet absorber, a light stabilizer, an antistatic agent, a lubricant, and a colorant.

[0064] The hardness of the protrusions 212 can be increased by increasing the amount of components in the second composition that are solid at room temperature, such as polymers and fillers.

[0065] The adhesive strength of the surface layer 21 in this embodiment can be 0.1 N / 25 mm or more and 5.0 N / 25 mm or less. The adhesive strength of the surface layer 21 is measured in accordance with the test method described in JIS Z 0237:2022 (Test Methods for Adhesive Tapes and Adhesive Sheets). Specifically, in an environment of 23°C temperature and 50% humidity, a test piece having a width of 25 mm (a width corresponding to the width direction D2) is cut out from the adhesive tape 20, and the test piece is pressure-bonded to an SUS steel plate using a pressure-bonding device equipped with a 2 kg pressure-bonding roller. After 30 minutes, the test piece is peeled off at an angle of 180° from the SUS steel plate at a tensile speed of 300 mm / min to measure the adhesive strength.

[0066] The substrate 22 of this embodiment has a plurality of layers formed by stacking two or more layers. That is, the substrate 22 has a support layer 221 that supports the surface layer portion 21 and an easily peelable layer 222 that promotes peeling from the first contact surface 21 a and the second contact surface 21 b of the surface layer portion 21 in the roll body 20 r. Although not shown, an intermediate layer may be interposed between the support layer 221 and the easily peelable layer 222.

[0067] The easily peelable layer 222 of this embodiment is made of a silicone-based surface treatment agent, and is easily peeled off from the first contact surface 21 a and the second contact surface 21 b. Note that the surface treatment agent is not limited to the above, and may be, for example, a fluorine-based surface treatment agent or a long-chain alkyl-based surface treatment agent.

[0068] The intermediate layer is made of, for example, a film made of polyolefin such as polyethylene.

[0069] The thickness of the substrate 22 is, for example, 10 μm or more, or may be 25 μm or more, 40 μm or more, or 50 μm or more, or may be, for example, 200 μm or less, or may be 150 μm or less, or may be 100 μm or less.

[0070] The width of the substrate 22 is, for example, preferably 30 mm or more, may be 50 mm or more, or may be 100 mm or more, and the width of the substrate 22 is, for example, preferably 500 mm or less, may be 400 mm or less, may be 300 mm or less, or may be 200 mm or less.

[0071] Next, a modified example of the adhesive tape 20 will be described with reference to Fig. 5. In the description of the modified adhesive tape 20, components that are substantially the same as those in the adhesive tape 20 shown in Figs. 1 to 4 will be assigned reference numerals and descriptions thereof will be omitted.

[0072] 5, the adhesive portion 211 of the modified example is composed of a plurality of linear portions 2111 protruding from the surface of the base material 22 in the thickness direction D3. The linear portions 2111 extend in the length direction D1 and are formed at intervals d1 in the width direction D2. Each linear portion 2111 has a width W, which is its length in the width direction D2.

[0073] The plurality of protrusions 212 are formed on each linear portion 2111. Specifically, each protrusion 212 is formed on the center line of each linear portion 2111 in the width direction D2. The plurality of protrusions 212 extend along the length direction D1 and are formed at intervals d2 in the width direction D2. Furthermore, each protrusion 212 is formed so as to expose the surface of the linear portion 2111 on both sides in the width direction D2. In the roll body 20r, the plurality of linear portions 2111 and the plurality of protrusions 212 protrude radially outward.

[0074] Between adjacent linear portions 2111 and between adjacent protrusions 212 formed thereon, grooves 213 are formed that expose the surface of the base material 22 and the surface of the linear portions 2111. The grooves 213 are wider in the portions of the adhesive portion 211 that are defined by adjacent protrusions 212 than in the portions of the adhesive portion 211 that are defined by adjacent linear portions 2111. In other words, the relationship d1<d2 holds.

[0075] In this embodiment, each linear portion 2111 has a rectangular cross section perpendicular to the length direction D1, and has a long, narrow strip shape when viewed from one side in the thickness direction D3. However, the present invention is not limited to this, and the linear portion 2111 may have a trapezoidal shape tapering toward its distal end. Furthermore, the protrusion portion 212 may have a trapezoidal shape tapering toward its distal end, or the distal end may be rounded.

[0076] The adhesive portion 211, which is composed of the plurality of linear portions 2111, and the plurality of protrusions 212, allow the surface layer 21 to have a plurality of first contact surfaces 21a, which are strong adhesive surfaces that are the exposed surfaces of the adhesive portion 211 (linear portions 2111), a plurality of second contact surfaces 21b, which are weak adhesive surfaces that are the tip surfaces of each protrusion 212, and a plurality of third contact surfaces 21c, which are non-adhesive surfaces that are the exposed surfaces of the base material 22. The first contact surfaces 21a, the second contact surfaces 21b, and the third contact surfaces 21c can be surfaces that come into contact with the cleaning target during use. More specifically, the first contact surface 21a of the adhesive portion 211 mainly comes into contact with the cleaning target having a highly uneven surface, such as a carpet or rug, and contributes to capturing foreign matter adhering thereto. The second contact surface 21b of the protrusion 212 mainly contacts cleaning targets with smooth surfaces, such as flooring, and contributes to capturing foreign matter adhering thereto. The third contact surface 21c of the base material 22 mainly contacts cleaning targets with highly uneven surfaces, such as carpets and rugs, and contributes to preventing the first contact surface 21a from sticking to the surface. The first contact surface 21a contacts relatively uneven surfaces, such as carpets, by contacting the convex portions of the surface that fit into the grooves 213. On the other hand, the protrusion of the protrusion 212 prevents the first contact surface 21a from coming into contact with hard surfaces, such as flooring, and only makes at least partial contact. The second contact surface 21b contacts both surfaces, such as carpets and flooring, and contributes to preventing the first contact surface 21a from sticking to the surface on carpets and mainly contributes to capturing foreign matter on flooring.

[0077] The width w2 of each first contact surface 21a (the width on one side via the protrusion 212) is preferably equal to or greater than the width of the second contact surface 21b, preferably 1.5 times or more, and more preferably 2 times or more. More specifically, the width w2 of each first contact surface 21a is preferably 0.5 mm or more, and more preferably 1 mm or more. This improves the gripping ability on surfaces such as carpet. Meanwhile, the width w2 of each first contact surface 21a is preferably 5 times or less, and more preferably 4 times or less, the width of the second contact surface 21b. More specifically, the width of each first contact surface 21a is preferably 10 mm or less, more preferably 5 mm or less, and even more preferably 4 mm or less. This improves the running performance on surfaces such as flooring.

[0078] Furthermore, the width of the second contact surface 21b when each protrusion 212 is viewed from one side of the thickness direction D3 is 0.4 mm or more, and more preferably 0.8 mm or more, assuming that it is smaller than the width of each linear portion 2111. Having a width of 0.4 mm or more on the second contact surface 21b provides excellent running performance on surfaces such as flooring. Additionally, in the roll body 20r, the leading end surface of the protrusion 212 on the nth turn and the leading end surface of the protrusion 212 on the n+1th turn can easily overlap in the radial direction, thereby achieving the desired hardness of the wound portion formed by the protrusions 212 and suppressing collapse of the roll body 20r. Furthermore, the protrusions 212 are less likely to peel off from the linear portions 2111. The width of the second contact surface 21b is preferably 2 mm or less, and more preferably 1.5 mm or less. By making the width of the second contact surface 21b 2 mm or less, it becomes easier to capture foreign matter adhering to the surface of flooring or the like.

[0079] Furthermore, the width of the third contact surface 21c is preferably at least 0.5 times the width of each first contact surface 21a. More specifically, the width of the third contact surface 21c is preferably at least 0.5 mm, and more preferably at least 1 mm. This allows adjacent protrusions 212 to be sufficiently spaced apart, making it easier for the first contact surface 21a to come into contact with a surface such as carpet. On the other hand, the width of the third contact surface 21c is preferably equal to or smaller than the width of each first contact surface 21a. Specifically, the width of the third contact surface 21c is preferably at most 10 mm, more preferably at most 5 mm, and even more preferably at most 3 mm. This allows adjacent protrusions 212 to be sufficiently close together, making it less likely for the first contact surface 21a to come into contact with a surface such as flooring. The width of the first contact surface 21a, the width of the second contact surface 21b, and the width of the third contact surface 21c are calculated by enlarging and observing the cross section of the portion pulled out along a plane from the roll body 20r using a microscope or the like, measuring the width at any 10 points, and averaging them.

[0080] In this embodiment, the surface layer 21 has 0.5 to 4 linear portions 2111 per 10 mm of width, in other words, 0.5 to 4 ridge portions 212 per 10 mm of width. Preferably, the surface layer 21 has 1 to 2 linear portions 2111 per 10 mm of width, in other words, 1 to 2 ridge portions 212 per 10 mm of width. Having 0.5 or more ridge portions 212 per 10 mm defines a high density of the ridge portions 212 in the surface layer 21. When contacting a surface such as flooring, the high density of the ridge portions 212 enhances the function of separating the first contact surface 21a of the adhesive portion 211 from the surface of the flooring, thereby providing desired running performance on the surface. On the other hand, having 4 or fewer ridge portions 212 defines a low density of the ridge portions 212 in the surface layer 21. Furthermore, a surface such as a carpet having relatively large irregularities (especially the convex portions of the surface) can easily get into between the protrusions 212, thereby imparting the desired capturing properties to the surface.

[0081] In this embodiment, the size of the intervals d1 and d2 (particularly interval d2), which are the widths of the grooves 213, represents the distance between adjacent protrusions 212. In this embodiment, interval d1 corresponds to the width of the third contact surface 21c. Furthermore, interval d2 corresponds to the sum of the width of the third contact surface 21c and the widths of the two second contact surfaces 21b on either side of the third contact surface 21c. The interval d2 is preferably 1 mm or more and 20 mm or less, more preferably 2 mm or more and 10 mm or less, and even more preferably 3 mm or more and 10 mm or less. This prevents adjacent protrusions 212 from being too far apart or too close together, allowing for a well-balanced ride on surfaces such as hardwood floors and gripping ability on surfaces such as carpet.

[0082] Next, a method for manufacturing the adhesive tape 20 of this embodiment will be described.

[0083] The manufacturing method of the adhesive tape 20 of this embodiment includes, but is not limited to, an adhesive portion forming process of forming a layered adhesive portion 211 on the surface of the substrate 22, and a protrusion portion forming process of forming a plurality of protrusion portions 212 on the surface of the adhesive portion 211.

[0084] In the manufacturing method of this embodiment, the first composition and the second composition are melted. Then, using a coating device such as a die coater, the first composition is applied to the surface of the substrate 22, and the second composition in a melted state is applied onto the coating film formed by the melted first composition. That is, the manufacturing method of this embodiment employs a wet-on-wet method.

[0085] It should be noted that the adhesive cleaner according to the present invention is not limited to the above-described embodiment. Furthermore, the adhesive cleaner according to the present invention is not limited by the above-described effects. The adhesive cleaner according to the present invention can be modified in various ways without departing from the spirit and scope of the present invention.

[0086] For example, the adhesive portion and the protrusions may be made of the same polymer composition, or the adhesive portion and the protrusions may be integrally formed.

[0087] Furthermore, in the above embodiment, the protrusions 212 are formed on the adhesive portion 211, but the protrusions 212 may also be formed on the surface of the base material 22. In this way, the hardness of the protrusions 212 can be changed depending on the material on which the protrusions 212 are formed, and specifically, the protrusions 212 formed on the adhesive portion 211, which has a relatively low hardness, will have a low hardness, and the protrusions 212 formed on the surface of the base material 22, which has a relatively high hardness, will have a high hardness.

[0088] The present invention will now be further described with reference to examples.

[0089] [Preparation of first composition constituting adhesive portion] The following raw materials were mixed to prepare a rubber-based adhesive (SIS-based adhesive composition) for constituting the adhesive portion. Base polymer: styrene-isoprene-styrene block copolymer (SIS) manufactured by Zeon Corporation, trade name "Quintac 3520" / 100 parts by mass Tackifier resin: unhydrogenated hydrocarbon resin manufactured by ENEOS Corporation, trade name "T-REZ RC093" / 130 parts by mass Plasticizer: naphthenic process oil manufactured by Idemitsu Kosan Co., Ltd., trade name "Diana Process Oil NS90S" / 100 parts by mass

[0090] [Preparation of second composition constituting protrusions] Base polymer: 100 parts by mass of an ABA-type acrylic block copolymer (hard block: MMA, soft block: BA / 2EHA (approximately 50 / 50), mass ratio of hard block to soft block: 18 / 82) Filler: 160 parts by mass of a masterbatch containing calcium carbonate particles and polyethylene resin in a mass ratio of 8:2 (128 parts by mass of calcium carbonate particles) Acrylic oligomer: 50 parts by mass of product name "Arfon UP-1000" (Mw: approximately 3000), manufactured by Toagosei Co., Ltd.

[0091] [Preparation example of adhesive tape] A sheet (width 160 mm) is prepared as a substrate, one side of which is laminated with polyethylene film, and the first composition and the second composition prepared above are melted and applied to the substrate using a die coater.The first composition is directly applied to the non-laminated surface that is not laminated, and the second composition in a melted state is applied on the coating film formed by the first composition in a melted state.In addition, the width of each of the pair of non-adhesive portions is 5 mm, and the width of the surface layer portion is 150 mm.

[0092] [Evaluation 1: Runnability on Flooring] The roll was rolled at 30 m / min and evaluated according to the following evaluation criteria: (Evaluation criteria) ○: The adhesive tape did not stick to the flooring, and runnability was excellent ×: The adhesive tape stuck to the flooring, and runnability was poor

[0093] [Evaluation 2: Running Performance on Carpet] Evaluation was made based on the resistance value (N / 160 mm) when the roll body was rolled at 30 m / min.

[0094] [Evaluation 3: Ability to Capture Foreign Matter on Carpet] Colored sand was scattered on a carpet as foreign matter, and the roll was rolled until the colored sand could no longer adhere. The difference in mass of the roll before and after the colored sand was applied was taken as the amount of foreign matter attached, and converted into the amount of adhesion per unit area. In addition, the amount of colored sand that fell when the outermost periphery of the roll to which the colored sand had adhered was peeled off was observed, and converted into the amount of colored sand that fell per unit area. The ability to capture foreign matter was evaluated based on these converted values ​​of adhesion force and amount of fallen sand.

[0095]

[0096] The matters disclosed in this specification include the following. (1) An adhesive cleaner comprising an adhesive tape, the adhesive tape being wound to form a roll body with a surface layer portion facing outward, the roll body being configured to roll with the surface layer portion in contact with an object to be cleaned, the surface layer portion having an adhesive portion with an adhesive surface and a plurality of ridge portions protruding radially outward from the adhesive surface of the roll body, the plurality of ridge portions extending in the same direction while being spaced apart from one another, the width of each ridge portion being 0.4 mm to 2 mm, and the number of ridge portions per 10 mm width being 0.5 to 4. (2) An adhesive cleaner according to (1) above, in which the hardness of the adhesive portion is equal to or less than the hardness of the ridge portions. (3) An adhesive cleaner according to (1) or (2) above, in which the hardness of the surface layer portion of the roll body measured with an Asker C-type hardness tester is 70 or less. (4) An adhesive cleaner according to any one of (1) to (3) above, wherein the protrusions protrude radially outward from the adhesive surface by 20 μm or more. (5) An adhesive cleaner according to any one of (1) to (4) above, wherein the adhesive portion is composed of a plurality of linear portions extending along the same direction as the extension of the protrusions while being spaced apart from one another, the plurality of protrusions being formed on each linear portion, and adjacent protrusions are separated by at least the spacing between the plurality of linear portions. (6) An adhesive cleaner according to any one of (1) to (5) above, wherein the adhesive portion is composed of a hot melt adhesive.

[0097] 1: adhesive cleaner, 10: roll member, 20: adhesive tape, 20r: roll body, 21: surface layer portion, 21a: first contact surface, w1, w2: width, 21b: second contact surface, 21c: third contact surface, 211: adhesive portion, W: width, 212: protrusion portion, 213: groove, d1, d2: spacing, 22: substrate, 221: support layer, 222: easily peelable layer, 23: easily tearable line, 24: non-adhesive portion, 30: shaft member, 31: operating shaft, 40: grip member, D1: length direction, D2: width direction, D3: thickness direction

Claims

1. An adhesive cleaner comprising: an adhesive tape; the adhesive tape is wound to form a roll body with a surface layer facing outward; the roll body is configured to roll with the surface layer in contact with an object to be cleaned; the surface layer has an adhesive portion having an adhesive surface, and a plurality of ridge portions protruding radially outward from the adhesive surface of the roll body; the plurality of ridge portions extend in the same direction while being spaced apart from one another; the width of each ridge portion is between 0.4 mm and 2 mm; and the number of ridge portions per 10 mm width is between 0.5 and 4.

2. The adhesive cleaner according to claim 1, wherein the hardness of the adhesive portion is equal to or less than the hardness of the protrusion portion.

3. An adhesive cleaner according to claim 1 or 2, wherein the hardness of the surface layer of the roll body as measured by an Asker C-type hardness tester is 70 or less.

4. An adhesive cleaner as described in claim 1 or 2, wherein the protrusions protrude radially outward from the adhesive surface by 20 μm or more.

5. An adhesive cleaner as described in claim 1 or 2, wherein the adhesive portion is composed of a plurality of linear portions which are spaced apart from one another and extend in the same direction as the extension direction of the protrusion portions, the plurality of protrusion portions are formed on each linear portion, and adjacent protrusion portions are separated by at least the spacing between the plurality of linear portions.

6. An adhesive cleaner according to claim 1 or 2, wherein the adhesive portion is made of a hot melt adhesive.

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