Adhesive cleaner

Abstract

An adhesive cleaner includes an adhesive tape formed into a roll body with the surface portion facing outwards. The roll body is configured to roll while the surface portion contacts the object being cleaned. The surface portion has an adhesive portion and a plurality of protrusions. The adhesive portion has an adhesive surface. The plurality of protrusions protrude radially outwards from the adhesive surface of the roll body. The plurality of protrusions are spaced apart from each other and extend in the same direction. The width of each protrusion is 0.4 mm or more and 2 mm or less, and the number of protrusions with a width of 10 mm or more is 0.5 or more and 4 or less.

Description

[0001] Cross-referencing of related applications

[0002] This application claims priority to Japanese Patent Application No. 2023-187774, which is incorporated herein by reference. Technical Field

[0003] This invention relates to an adhesive cleaner. Background Technology

[0004] Conventionally, adhesive cleaners with adhesive tape have been used as cleaning tools for floors, carpets, etc. One known adhesive cleaner has an adhesive tape having a strip-shaped substrate and an adhesive surface formed only on one side of the substrate. This adhesive cleaner is formed as a roll with the adhesive surface of the adhesive tape facing outwards. According to this adhesive cleaner, by rolling the roll over the object to be cleaned, such as a floor, foreign objects on the object can be adhered to the adhesive surface. Furthermore, if the adhesive strength of the adhesive surface decreases due to the capture of foreign objects, the outermost portion of the roll that has been used can be torn off, thereby exposing a new adhesive surface (e.g., Patent Document 1).

[0005] Existing technical documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2018-745 Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] Furthermore, this type of adhesive cleaner requires the roll to move smoothly over surfaces such as floors, and the ability to capture foreign objects on the surface using the adhesive surface. However, if it is made easy to move over surfaces with few bumps and relatively smooth surfaces, such as floors, there is a problem that it cannot adequately capture foreign objects on surfaces with larger bumps, such as carpets and rugs. This is believed to be because if its mobility on floors is increased by excessively weakening the adhesive strength, the adhesive strength will be lower than that required for capturing on carpets and rugs. On the other hand, if its capturing on carpets or rugs is increased by excessively strengthening the adhesive strength, the adhesive tape may easily stick to the floor, reducing its mobility.

[0009] In view of the aforementioned problems, the objective of the present invention is to provide an adhesive cleaner that exhibits excellent mobility on relatively smooth surfaces with few bumps, such as floors, and excellent ability to capture foreign objects on relatively rough surfaces, such as carpets.

[0010] Solution for solving the problem

[0011] The adhesive cleaner of the present invention includes an adhesive tape.

[0012] The adhesive tape is formed into a roll with the surface portion facing outwards.

[0013] The roll body is configured to roll while the surface portion is in contact with the object being cleaned.

[0014] The surface layer has an adhesive portion and a plurality of protruding portions. The adhesive portion has an adhesive surface, and the plurality of protruding portions protrude radially outward from the adhesive surface onto the roll body.

[0015] The plurality of protrusions are spaced apart from each other and extend in the same direction.

[0016] The width of each protrusion is 0.4 mm or more and 2 mm or less, and the number of protrusions with a width of 10 mm or more is 0.5 or more and 4 or less.

[0017] The adhesive cleaner of the present invention addresses the aforementioned problem by having wider and more spaced protrusions compared to conventional adhesive cleaners. Specifically, the adhesive cleaner of the present invention achieves excellent mobility on relatively smooth surfaces with few bumps, such as floors, by having protrusions that allow the adhesive surface to separate from the cleaning object at a width of 0.4 mm or more and a number of 0.5 or more. Furthermore, by having protrusions that are 2 mm or less wide and a number of 4 or fewer, the adhesive surface can easily contact surfaces with relatively large bumps, such as carpets, thus providing excellent gripping ability on such surfaces.

[0018] In one aspect of the adhesive cleaner of the present invention, the hardness of the adhesive portion is lower than or equal to the hardness of the protruding portion.

[0019] According to this structure, compared to a method where the hardness of the adhesive part is greater than that of the protrusion part, foreign objects are more likely to fall into the adhesive part, thus suppressing the detachment of captured foreign objects.

[0020] In one aspect of the adhesive cleaner of the present invention, the surface portion of the roll body has a hardness of 70 or less as measured by an ASKER C-type hardness tester.

[0021] According to this structure, the surface layer of the roll body has an ASKER C hardness of 70 or less, thereby improving the buffering capacity of the roll body and allowing foreign objects to be trapped in the surface layer for capture. Furthermore, foreign objects captured in this way are less likely to detach from the surface layer, thus eliminating the need for repeated cleaning.

[0022] In one aspect of the adhesive cleaner of the present invention, the protruding strip protrudes more than 20 μm radially outward relative to the adhesive surface of the roll body.

[0023] According to this structure, the protrusion length of the protrusion relative to the adhesive surface is more than 20 μm, thereby preventing the adhesive surface from adhering to smooth surfaces such as floors, and enabling the roll body to move more smoothly.

[0024] In one aspect of the adhesive cleaner of the present invention,

[0025] The adhesive portion is composed of multiple linear portions, which are spaced apart from each other and extend in the same direction as the extending direction of the protruding portion.

[0026] The plurality of protrusions are formed on each linear portion, and adjacent protrusions are separated from each other by an amount at least equivalent to the interval between the plurality of linear portions.

[0027] According to this structure, the adhesive portion is composed of multiple linear portions spaced apart. This facilitates the movement of the roll body on smooth surfaces compared to an adhesive portion that extends continuously in the planar direction. Furthermore, adjacent protrusions are separated from each other by an amount corresponding to the interval of the adhesive portion, thus easily exposing the adhesive surface. Although the area of ​​the adhesive surface is relatively small due to the aforementioned intervals, the adhesive surface easily contacts surfaces such as carpets. In other words, it is possible to efficiently capture foreign objects on carpets or similar surfaces.

[0028] In one aspect of the adhesive cleaner of the present invention, the adhesive portion is made of hot melt adhesive.

[0029] According to this structure, the adhesive part is made of hot melt adhesive, thus providing excellent mobility and capture.

[0030] As described above, according to the present invention, it is possible to provide an adhesive cleaner that has excellent mobility on relatively smooth surfaces with few bumps, such as floors, and excellent ability to capture foreign objects on relatively rough surfaces, such as carpets. Attached Figure Description

[0031] Figure 1 This is a front view of an adhesive cleaner according to one embodiment of the present invention.

[0032] Figure 2 yes Figure 1 Side view of the adhesive cleaner.

[0033] Figure 3 express Figure 1 The adhesive tape in the adhesive cleaner indicates that a portion of the adhesive tape that has been formed into a roll has been pulled out.

[0034] Figure 4 yes Figure 3 A cross-sectional view of the adhesive tape.

[0035] Figure 5 This is a cross-sectional view of a modified adhesive tape.

[0036] Figure 6 It is a diagram that summarizes the load-displacement curve of the adhesive part 211 or the protruding part 212. Detailed Implementation

[0037] Hereinafter, an adhesive cleaner according to one embodiment of the present invention will be described with reference to the accompanying drawings.

[0038] like Figure 1 and Figure 2 As shown, the adhesive cleaner 1 of this embodiment includes: a rod-shaped roll member 10 capable of rotating about an axis; an adhesive tape 20 configured as a cylindrical roll body 20r, which has an insertion hole for inserting into the roll member 10; a shaft member 30 that supports the roll member 10 in such a way that the roll member 10 can rotate about an axis; and a gripping member 40 connected to the end of the shaft member 30 opposite to the portion supporting the roll member 10.

[0039] In the adhesive cleaner 1 of this embodiment, the roll member 10 is cylindrical, having an outer peripheral surface that supports the inner peripheral surface of the roll body 20r, and is configured to rotate about an axis while supporting the roll body 20r. The adhesive tape 20 includes a surface portion 21 having an adhesive surface that contacts the object being cleaned, and is wound to form the roll body 20r with the adhesive surface facing outward. The shaft member 30 is formed by bending a 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 extending from the roller support shaft to the outside of the roll member 10 and radially along the roll member 10. The gripping member 40 is a part for the user to grasp, and it engages with the end of the shaft member 30 on the side of the operating shaft 31. With this structure, when the user of the adhesive cleaner 1 moves the shaft component 30 in a direction orthogonal to the rotation axis of the roll component 10 while the adhesive surface of the roll body 20r is in contact with the object to be cleaned, the roll body 20r can roll on the object to be cleaned by the frictional force generated between the adhesive surface and the object to be cleaned, that is, the frictional force acting in the circumferential direction of the roll body 20r.

[0040] Next, refer to Figure 3 and Figure 4 The adhesive tape 20 of this embodiment will be described in detail. The adhesive tape 20 is a strip capable of forming a roll body 20r. Hereinafter, regarding each direction of the adhesive tape 20 in the state of being pulled out of the roll body 20r along a plane, the direction in the planar direction of the adhesive tape 20 that is pulled out of the roll body 20r, i.e., the first direction, is called the length direction D1; the second direction in the planar direction that is orthogonal to the length direction D1 is called the width direction D2; and the third direction that is orthogonal to both the length direction D1 and the width direction D2 is called the thickness direction D3. In addition, the direction of the roll body 20r around the winding axis is called the circumferential direction.

[0041] like Figure 3 As shown, the adhesive tape 20 has multiple easy-cut lines 23 extending along the width direction D2 at a predetermined position in the length direction D1. These easy-cut lines 23 are formed at predetermined intervals in the length direction D1 to allow separation of the outermost peripheral portion of the roll body 20r, whose adhesive strength decreases with use. In this embodiment, the easy-cut lines 23 are formed by perforated lines, but the embodiment is not limited to this and can be constructed using known methods.

[0042] like Figure 4 As shown, the adhesive tape 20 includes a surface layer 21 with an adhesive surface and a substrate 22 on which the surface layer 21 is laminated. The surface layer 21 is formed only on one side of the substrate 22. Hereinafter, regarding the adhesive tape 20 itself and the surfaces of each layer of the adhesive tape 20, the surface facing outward when forming the roll body 20r will be designated as the front side, and the surface facing inward will be designated as the back side.

[0043] In this embodiment, the surface layer 21 is laminated onto the substrate 22 such that the surfaces of the two end edges (extending along the length direction D1) of the substrate 22 in the width direction D2 are exposed. In other words, the adhesive tape 20 of this embodiment includes: a pair of non-adhesive portions 24 (dry edges) formed by the exposed surfaces of the two end edges of the substrate 22, and a surface layer 21 formed between the pair of non-adhesive portions 24. The width of the non-adhesive portions 24 can be 1 mm to 20 mm, or 3 mm to 15 mm.

[0044] The surface layer 21 has: an adhesive portion 211, which is laminated on the surface of the substrate 22; and a plurality of protrusions 212, which have a weaker adhesive force than the adhesive portion 211 and protrude from the surface of the adhesive portion 211 along the thickness direction D3.

[0045] In this embodiment, the adhesive portion 211 is continuous without interruption in the width direction D2. Therefore, the adhesive portion 211 in this embodiment has a pair of side surfaces in the width direction D2, and the length between these side surfaces is the width W.

[0046] Multiple protrusions 212 extend along one of the surface directions of the adhesive tape 20 and are formed at predetermined intervals in a direction orthogonal to that direction. More specifically, the multiple 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 multiple protrusions 212 protrude radially outward.

[0047] In this embodiment, the cross-section of the protruding strip 212 orthogonal to the length direction D1 is quadrilateral, and when viewed from the thickness direction D3, it appears as a long, thin strip. Furthermore, the invention is not limited to this; the protruding strip 212 can also be a trapezoid that tapers towards the front end, and the front end face can also have rounded corners.

[0048] The surface portion 21, through the adhesive portion 211 and the plurality of protrusions 212 as described above, has: a plurality of first contact surfaces 21a formed by the exposed surface of the adhesive portion 211, i.e., the strong adhesive surface, and a plurality of second contact surfaces 21b formed by the front end surfaces of each protrusion 212, i.e., the weak adhesive surfaces. The first contact surfaces 21a and the second contact surfaces 21b can become surfaces that come into contact with the object being cleaned during use. More specifically, the first contact surfaces 21a of the adhesive portion 211 mainly contact objects with surfaces that have relatively large unevenness, such as carpets and rugs, thereby helping to capture foreign objects attached thereto. The second contact surfaces 21b of the protrusions 212 mainly contact objects with surfaces that have less unevenness, such as floors, thereby helping to capture foreign objects attached thereto.

[0049] The adhesive portion 211 has a thickness of 20 μm or more. This adhesive cleaner 1 can deeply embed foreign objects into the adhesive portion 211 to capture them and can prevent the captured foreign objects from falling off. The thickness of the adhesive portion 211 is preferably 30 μm or more, more preferably 40 μm or more. On the other hand, the thickness of the adhesive portion 211 is preferably 100 μm or less, and can also be 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, or 50 μm. Moreover, the thickness of the adhesive portion 211 is calculated by magnifying and observing the cross-section of the portion pulled out from the roll body 20r along a plane using a microscope or the like, measuring the thickness at any 10 points, and averaging the results.

[0050] Each protrusion 212 is configured to have a weaker adhesive force than the adhesive portion 211, and exhibits a hardness greater than or equal to that of the adhesive portion 211. In this embodiment, each protrusion 212 is configured to be harder than the adhesive portion 211; specifically, its hardness is 0.04 MPa or higher. Furthermore, the hardness of the adhesive portion 211 and the protrusion 212 is measured according to ISO 14577 using the nanoindentation method. Figure 6 The load-displacement curves obtained by nanoindentation shown include load and unload curves. The load curve represents the relationship between the displacement of the sample and the load of the indenter when the indenter is pressed to a specified depth. The unload curve represents the relationship between the displacement of the sample and the load of the indenter when the indenter is withdrawn from the specified depth. Regarding the specific measurement conditions used to obtain these load-displacement curves, a "TI950 TriboIndenter" (manufactured by Hysitron) was used. A spherical conical indenter with a radius of curvature of 10 μm was used. The indentation depth was set to 3.5 μm, the indentation speed was set to 5000 nm / s, and the withdrawal speed was set to 5000 nm / s. The measurement temperature was set to 25°C. Three measurements were performed, and the average value was used. Hardness is calculated by indenting the indenter to the specified depth h.Pmax The load capacity is set to the maximum load capacity P. max It will reach h Pmax When the cross-sectional area at the contact depth between the pressure head and the sample is set as the contact projected area A, the pressure head passes through P. max Calculated by / A.

[0051] In the roll body 20r, each protruding strip 212 overlaps radially (from the innermost circumference to the outermost circumference of the roll body 20r) to form a plurality of winding portions extending radially. Furthermore, the winding portions are spaced apart in the width direction D2 of the roll body 20r. The winding portions of this embodiment exhibit significantly greater rigidity than the winding portions formed by the adhesive portion 211 due to the overlap of the relatively stiff protruding strips 212. Moreover, the winding portions formed by these protruding strips 212 exhibit excellent resistance to pressure from above when the roll body 20r moves, and are not easily deformed. Through these effects, in this embodiment, the protruding strips 212 can easily and fully perform their function.

[0052] The surface layer 21 of the roll body 20r, when measured by an ASKER C-type hardness tester, has a hardness of 70 or less, more preferably 60 or less. This improves the cushioning of the roll body 20r, allowing foreign objects to be trapped in the surface layer 21 and captured. Furthermore, foreign objects captured in this way are less likely to detach from the surface layer 21, thus eliminating the need for re-cleaning. On the other hand, this hardness is preferably 40 or more. Furthermore, the hardness here refers to the value measured by using a roll body formed by stacking 30 turns of adhesive tape 20 as a sample and pressing an indenter against any part of the sample.

[0053] The protrusion height (i.e., the thickness of the protrusion 212) of the plurality of protrusions 212 from the first contact surface 21a (strong adhesive surface) is 40 μm or more, preferably 50 μm or more, more preferably 60 μm or more, further preferably 70 μm or more, and even more preferably 80 μm or more. On the other hand, the protrusion height of the plurality of protrusions 212 is preferably 150 μm or less, and may also be 140 μm or less, 130 μm or less, 120 μm or less, 110 μm or less, or 100 μm or less. Furthermore, the thickness of the plurality of protrusions 212 is calculated by magnifying and observing the cross-section of the portion pulled out from the roll body 20r along a plane using a microscope or the like, measuring any 10 protrusions and averaging them.

[0054] 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, more preferably 2 times or more, the thickness of the adhesive portion 211. This prevents the adhesive portion 211 from adhering to a relatively flat surface such as a floor. On the other hand, the protrusion height of the plurality of protrusions 212 is preferably 5 times or less, more preferably 3 times or less, the thickness of the adhesive portion 211. This allows the first contact surface 21a of the adhesive portion 211 to easily contact the cleaning object such as a carpet, enabling the adhesive portion 211 to fully perform its foreign object capture function.

[0055] By adjusting the thickness of the adhesive portion 211 and the protrusion height of the plurality of protrusions 212 as described above, the protrusion height of the surface portion 21 from the surface of the substrate 22 (i.e., the distance from the surface of the substrate 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. As a result, the total thickness of the portion formed by the adhesive increases, thus strengthening the adhesive force and improving foreign matter trapping ability.

[0056] The width w1 of each first contact surface 21a (corresponding to interval d in this embodiment) is preferably greater than or equal to the width of the second contact surface 21b, preferably 1.5 times or more, more preferably 2 times or more. More specifically, the width of each first contact surface 21a is preferably 0.5 mm or more, more preferably 1 mm or more. This improves the ability to capture foreign objects on surfaces such as carpets. On the other hand, the width of each first contact surface 21a is preferably 10 times or less than the width of the second contact surface 21b, more preferably 8 times or less, and even more preferably 6 times or less. 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 its mobility on surfaces such as floors.

[0057] 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, more preferably 0.8 mm or more. By making the width of the second contact surface 21b 0.4 mm or more, excellent mobility on surfaces such as floors is achieved. Moreover, in the roll body 20r, it is easy to make the front end face of the protrusion 212 of the nth turn overlap radially with the front end face of the protrusion 212 of the (n+1)th turn, thereby achieving the desired hardness in the winding portion formed by the protrusions 212, and also having the effect of suppressing the collapse of the roll body 20r. The width of the second contact surface 21b is preferably 2 mm or less, more preferably 1.5 mm or less. By making the width of the second contact surface 21b 2 mm or less, it is easy to capture foreign objects adhering to surfaces such as floors.

[0058] The first contact surface 21a and the second contact surface 21b of the nth turn of the roll 20r are surfaces that can contact the back side of the (n+1)th turn (i.e., the back side of the substrate 22). This contact between the front side of the nth turn and the back side of the (n+1)th turn suppresses the phenomenon of the roll 20r unwinding when not in use (unwinding) and the phenomenon of the outer peripheral surface of the roll 20r sequentially adhering to the object being cleaned (track pulling). In this embodiment, the adhesive force of the adhesive portion 211 is relatively strong in order to capture foreign objects on surfaces such as carpets. Therefore, there is a concern that peeling the first contact surface 21a from the back side of the substrate 22 may be hindered, making it difficult to pull out the roll 20r. To address this, in this embodiment, the protruding strip 212, with a width of 0.4 mm or more and a protrusion height of 40 μm or more, sufficiently hinders the adhesion of the first contact surface 21a to the back side of the substrate 22. Although the adhesive force of the adhesive portion 211 is strong, pulling out the roll 20r is relatively easy.

[0059] The first composition (adhesive composition) constituting the adhesive portion 211 includes at least a polymer, a tackifier, and a plasticizer.

[0060] As the adhesive constituting the adhesive portion 211, examples of adhesives that can be used include acrylic adhesives, rubber adhesives, polyester adhesives, urethane adhesives, polyether adhesives, and silicone adhesives. Here, acrylic adhesives refer to adhesives that contain 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 mixing ratio) in the polymer composition. 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 can also be 100% by mass or less, and can also be 99% by mass or less. To obtain an adhesive portion 211 with a specified hardness, the adhesive is preferably an acrylic adhesive or a rubber adhesive, more preferably a rubber adhesive.

[0061] Acrylic adhesives contain acrylic polymers as base polymers. Acrylic polymers are polymers whose main component is an acrylic monomer having at least one (meth)acryloyl group. Acrylic polymers can be homopolymers or copolymers. 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. Furthermore, in this specification, (meth)acryloyl group is a collective term for acryloyl group and methacryloyl group; similarly, (meth)acrylate is a collective term for acrylate and methacrylate.

[0062] In rubber-based adhesives, the base polymer includes one or more rubber-based polymers selected from natural rubber, modified natural rubber, and other natural rubber-based polymers; styrene-based block copolymers such as isoprene rubber, chloroprene rubber, styrene-isoprene-styrene block copolymers (SIS), styrene-butadiene-styrene block copolymers (SBS), and styrene-ethylene / butene-styrene block copolymers (SEBS); olefin-based block copolymers such as crystalline polyolefin-ethylene / butene-crystalline polyolefin block copolymers (CEBC) and styrene-ethylene / butene-crystalline polyolefin block copolymers (SEBC). The rubber-based adhesive preferably includes styrene-based block copolymers, and more preferably includes styrene-isoprene-styrene block copolymers (SIS).

[0063] The tackifier comprises one or more tackifying resins selected from various tackifying resins such as rosin-based, terpene-based, hydrocarbon-based, epoxy-based, polyamide-based, elastic systems, phenol-based, and ketone-based resins. The amount of tackifier relative to 100 parts by weight of the base polymer of the adhesive is, for example, 50 to 200 parts by weight, preferably 80 to 150 parts by weight.

[0064] The plasticizer in the adhesive portion 211 comprises one or more processing oils selected from paraffinic, naphthenic, and aromatic oils. To obtain an adhesive portion 211 with a specified hardness, the amount of plasticizer relative to 100 parts by weight of the base polymer of the adhesive is preferably 50 parts by weight or more, more preferably 80 parts by weight or more, and even more preferably 90 parts by weight or more. On the other hand, the amount of plasticizer is preferably 200 parts by weight or less, more preferably 150 parts by weight or less. This suppresses changes in the hardness of the adhesive portion 211 caused by plasticizer seepage during storage.

[0065] In addition to the above, the first composition (adhesive composition) constituting the adhesive part 211 may also include various additives such as anti-aging agents, antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, lubricants, and colorants.

[0066] The hardness of the adhesive portion 211 can be reduced by increasing the amount of a component in the first composition that is liquid at room temperature (25°C). Examples of such components include plasticizers.

[0067] In this embodiment, the adhesive portion 211 is made transparent so that the user can visually identify the surface color of the substrate 22.

[0068] The second composition constituting the protrusion 212 includes at least a polymer, filler, and plasticizer that are different from the polymer contained in the first composition (adhesive composition) of the adhesive portion 211.

[0069] The polymer used for the protrusion 212 may be one or more of the following: polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer and other polyolefins; ethylene-vinyl acetate copolymer (EVA); acrylic block copolymers; polyvinyl chloride; polyesters such as PET; polyurethane; polyimide; polyamide; polycarbonate, etc. Thus, the polymer of the second composition is harder than the first composition in the adhesive portion 211.

[0070] The second composition of this embodiment comprises a polyolefin and an acrylic block copolymer. Preferably, the second composition comprises more acrylic block copolymer than polyolefin. Specifically, the mass ratio of the acrylic block copolymer to the polyolefin is preferably 2 to 10, more preferably 3 to 7.

[0071] Acrylic block copolymers are AB-type or ABA-type copolymers with hard blocks and soft blocks.

[0072] Examples of monomers constituting the hard block include alkyl methacrylates having alkyl groups 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, stearyl methacrylate, etc. These can be used in combination with more than one, but MMA alone is preferred.

[0073] As monomers constituting the soft block, examples 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, stearyl acrylate, etc. These can be used in combination of more than one; for example, a combination of n-butyl acrylate (BA) and 2-ethylhexyl acrylate (2EHA) is preferred.

[0074] The mass ratio of the hard block to the total mass of the acrylic block copolymer is preferably 10 to 35 by mass, more preferably 15 to 25 by mass.

[0075] Examples of fillers include: carbonates such as calcium carbonate, sodium carbonate, and sodium bicarbonate; metal oxides such as titanium oxide, silicon dioxide, aluminum oxide, zirconium oxide, zinc oxide, tin oxide, copper oxide, and nickel oxide; metal hydroxides or hydrated metal compounds 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, magnesium aluminum carbonate, sodium aluminum carbonate, borax, and zinc borate; 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; carbon-based materials such as carbon black, carbon nanotubes, carbon fibers, and diamond; glass; and other inorganic materials; metals such as copper, silver, gold, platinum, nickel, aluminum, chromium, iron, and stainless steel; and natural raw material particles such as volcanic white sand, clay, and sand. More than one of these can be used in combination.

[0076] To obtain a protrusion 212 with a specified hardness, the amount of filler prepared is preferably 50 to 100 parts by weight of the polymer (e.g., the polyolefin and the acrylic block copolymer) of the protrusion 212, more preferably 70 to 90 parts by weight, and even more preferably 75 to 85 parts by weight.

[0077] Examples of plasticizers include: acrylic oligomers, dioctyl phthalate, diisononyl phthalate, diisodecyl phthalate, dibutyl phthalate, and other phthalate esters; dioctyl adipate, diisononyl adipate, and other adipate esters; trioctyl trimellitate, etc.; 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; sorbitan monolaurate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, their ethylene oxide adducts, and other cyclic fatty acid esters or their derivatives, and processed oils. More than one of these can be used in combination. Among these, acrylic oligomers are preferred, and non-functional acrylic oligomers without hydroxyl groups are more preferred.

[0078] The amount of plasticizer is preferably 10 to 50 parts by weight relative to 100 parts by weight of the polymer (e.g., the polyolefin and the acrylic block copolymer) of the protrusion portion 212, more preferably 20 to 40 parts by weight, and even more preferably 30 to 40 parts by weight.

[0079] In addition to the above, the second composition constituting the protrusion 212 may also contain various additives such as anti-aging agents, antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, lubricants, and colorants.

[0080] The hardness of the protrusion 212 can be increased by increasing the amount of a component in the second composition that is solid at room temperature. Examples of such components include polymers and fillers.

[0081] The adhesive strength of the surface layer 21 in this embodiment is 0.1 N / 25 mm or more and 5.0 N / 25 mm or less. Furthermore, the adhesive strength of the surface layer 21 is measured according to the test method described in JIS Z 0237:2022 (Test Method for Adhesive Tape / Sheet). Specifically, the measurement is performed as follows: Under an environment of 23 degrees Celsius and 50% humidity, a test piece with a width of 25 mm (corresponding to the width direction D2) is cut from the adhesive tape 20. The test piece is pressed onto an SUS steel plate using a pressing device equipped with a 2 kg pressing roller. After 30 minutes, the test piece is peeled off from the SUS steel plate at a tensile speed of 300 mm / min at a 180° angle.

[0082] The substrate 22 of this embodiment has multiple layers formed by laminating two or more layers. That is, the substrate 22 has a support layer 221 that supports the surface layer 21, and an easy-peel layer 222 that facilitates peeling from the first contact surface 21a and the second contact surface 21b of the surface layer 21 in the roll body 20r. In addition, although not shown, an intermediate layer may be sandwiched between the support layer 221 and the easy-peel layer 222.

[0083] The easily peelable layer 222 of this embodiment is made of a silicone-based surface treatment agent, which is easily peeled off from the first contact surface 21a and the second contact surface 21b. Furthermore, the surface treatment agent is not limited to the above; for example, it can also be a fluorine-based surface treatment agent or a long-chain alkyl-based surface treatment agent.

[0084] The intermediate layer is, for example, a film made of polyolefins such as polyethylene.

[0085] The thickness of the substrate 22 may be, for example, 10 μm or more, or 25 μm or more, or 40 μm or more, or 50 μm or more. Alternatively, the thickness of the substrate 22 may be, for example, 200 μm or less, or 150 μm or less, or 100 μm or less.

[0086] The width of the substrate 22 is preferably 30 mm or more, and may also be 50 mm or more, or may also be 100 mm or more. In addition, the width of the substrate 22 is preferably 500 mm or less, and may also be 400 mm or less, 300 mm or less, or may also be 200 mm or less.

[0087] Next, refer to Figure 5 A modified example of the adhesive tape 20 will be described. Furthermore, in the description of the modified adhesive tape 20, the connection with... Figures 1-4The adhesive tape 20 shown is essentially the same structure as the reference mark, and its description is omitted.

[0088] like Figure 5 As shown, the adhesive portion 211 in the modified example is composed of a plurality of linear portions 2111 protruding from the surface of the substrate 22 along the thickness direction D3. The plurality of linear portions 2111 extend along the length direction D1 and are formed at intervals d1 in the width direction D2. In addition, each linear portion 2111 has a length, i.e., a width W, in the width direction D2.

[0089] Multiple 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 multiple protrusions 212 extend along the length direction D1 and are formed at intervals d2 in the width direction D2. In addition, each protrusion 212 is formed such that the surface of the linear portion 2111 is exposed on both sides in the width direction D2. In the roll body 20r, the multiple linear portions 2111 and the multiple protrusions 212 protrude radially outward.

[0090] Grooves 213 are formed between adjacent linear portions 2111 and between adjacent protrusions 212 formed on these linear portions 2111, exposing the surfaces of the substrate 22 and the linear portions 2111. The portion of the groove 213 defined by the adjacent protrusions 212 is wider than the portion defined by the adjacent linear portions 2111 in the adhesive portion 211. That is, the relationship is d1 < d2.

[0091] In this embodiment, the cross-section of each linear portion 2111 orthogonal to the length direction D1 is quadrilateral, and when viewed from the thickness direction D3 side, it appears as a long, thin strip. Furthermore, the invention is not limited to this; the linear portion 2111 can also be a trapezoid that tapers towards the front end. Additionally, the protruding portion 212 can be a trapezoid that tapers towards the front end, and the front end face can also have rounded corners.

[0092] The surface portion 21, comprised of an adhesive portion 211 (consisting of multiple linear portions 2111) and multiple protruding portions 212, has: multiple first contact surfaces 21a formed by the exposed surfaces of the adhesive portions 211 (linear portions 2111), i.e., strong adhesive surfaces; multiple second contact surfaces 21b formed by the front end surfaces of each protruding portion 212, i.e., weak adhesive surfaces; and multiple third contact surfaces 21c formed by the exposed surfaces of the substrate 22, i.e., non-adhesive surfaces. The first contact surfaces 21a, 21b, and 31c can become the surfaces that come into contact with the object being cleaned during use. More specifically, the first contact surfaces 21a of the adhesive portions 211 primarily contact objects with surfaces that have relatively large unevenness, such as carpets and rugs, which helps to capture foreign objects adhering to them. The second contact surfaces 21b of the protruding portions 212 primarily contact objects with surfaces that have relatively smooth unevenness, such as floors, which also helps to capture foreign objects adhering to them. The third contact surface 21c of the substrate 22 helps to prevent the first contact surface 21a from adhering to the surface of a cleaning object with a large amount of unevenness, such as a carpet or rug. The first contact surface 21a contacts surfaces with relatively unevenness, such as carpets, for example, the convex portion of the surface into the groove 213. On the other hand, due to the protrusion of the strip 212, the first contact surface 21a hardly contacts hard surfaces such as flooring, or at least only partially. The second contact surface 21b contacts both the carpet and the floor surface. On the carpet surface, it helps to prevent the first contact surface 21a from adhering to the surface, and on the floor surface, it mainly helps to capture foreign objects.

[0093] The width w2 of each first contact surface 21a (the width of one side of the clamping protrusion 212) is preferably greater than or equal to the width of the second contact surface 21b, preferably 1.5 times or more, more preferably 2 times or more. More specifically, the width w2 of each first contact surface 21a is preferably 0.5 mm or more, more preferably 1 mm or more. This improves the gripping ability on surfaces such as carpets. On the other hand, the width w2 of each first contact surface 21a is preferably 5 times or less than the width of the second contact surface 21b, more preferably 4 times or less. 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 mobility on surfaces such as floors.

[0094] Furthermore, regarding the width of the second contact surface 21b when viewing each protrusion 212 from one side in the thickness direction D3, it is at least 0.4 mm, more preferably at least 0.8 mm, provided it is less than the width of each linear portion 2111. By making the width of the second contact surface 21b at least 0.4 mm, excellent mobility on surfaces such as floors is achieved. Moreover, in the roll body 20r, it is easy to make the front end face of the protrusion 212 of the nth turn overlap radially with the front end face of the protrusion 212 of the (n+1)th turn, thereby achieving the desired hardness in the winding portion formed by the protrusions 212, and also suppressing the collapse of the roll body 20r. Furthermore, it also makes it less likely for the protrusions 212 to peel off from the linear portions 2111. Additionally, the width of the second contact surface 21b is preferably 2 mm or less, more preferably 1.5 mm or less. By making the width of the second contact surface 21b 2 mm or less, it is easy to capture foreign objects adhering to surfaces such as floors.

[0095] Furthermore, the width of the third contact surface 21c is preferably at least 0.5 times the width of each of the first contact surfaces 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 ensures that adjacent protrusions 212 are sufficiently separated, making it easier for the first contact surfaces 21a to contact surfaces such as carpets. On the other hand, the width of the third contact surface 21c is preferably less than or equal to the width of each of the first contact surfaces 21a. Specifically, the width of the third contact surface 21c is preferably less than 10 mm, more preferably less than 5 mm, and even more preferably less than 3 mm. This ensures that adjacent protrusions 212 are sufficiently close together, making it less likely for the first contact surfaces 21a to contact surfaces such as floors. Furthermore, the widths of the first contact surfaces 21a, 21b, and 31c are calculated by magnifying and observing the cross-section of the portion pulled out from the roll body 20r along a plane using a microscope or similar instrument, measuring the width at any 10 points, and averaging the measurements.

[0096] In this embodiment, the surface layer 21 has 0.5 to 4 linear portions 2111 per 10 mm width; in other words, it has 0.5 to 4 protruding portions 212 per 10 mm width. Preferably, the surface layer 21 has 1 to 2 linear portions 2111 per 10 mm width; in other words, it has 1 to 2 protruding portions 212 per 10 mm width. A density of 0.5 or more protruding portions 212 per 10 mm indicates a higher density of protruding portions 212 in the surface layer 21. Furthermore, when in contact with a surface such as a floor, the higher density of the protruding portions 212 improves the ability to separate the first contact surface 21a of the adhesive portion 211 from the surface, providing the necessary mobility on that surface. On the other hand, a density of 4 or fewer protruding portions 212 indicates a lower density of protruding portions 212 in the surface layer 21. Furthermore, surfaces such as carpets with relatively large unevenness (especially the convex portion of such surfaces) can easily enter between the protrusions 212, thus enabling them to be given the desired gripping properties on such surfaces.

[0097] In this embodiment, the width of the groove 213, i.e., the size of the intervals d1 and d2 (especially d2), indicates the degree of separation between adjacent protrusions 212. In this embodiment, the interval d1 corresponds to the width of the third contact surface 21c. Furthermore, the 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 adjacent to 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. Therefore, adjacent protrusions 212 are neither excessively separated nor excessively close together, thus achieving a balanced mobility on surfaces such as floors and a good gripping ability on surfaces such as carpets.

[0098] Next, the manufacturing method of the adhesive tape 20 of this embodiment will be described.

[0099] Although the manufacturing method of the adhesive tape 20 in this embodiment is not limited to the following method, it includes an adhesive portion forming process for forming a layered adhesive portion 211 on the surface of the substrate 22, and a protrusion portion forming process for forming a plurality of protrusion portions 212 on the surface of the adhesive portion 211.

[0100] In the manufacturing method of this embodiment, the first composition and the second composition are brought to a molten state. Then, using a coating apparatus such as a die coater, the first composition is coated onto the surface of the substrate 22, and the molten second composition is coated onto the coating film formed by the molten first composition. That is, the manufacturing method of this embodiment employs a wet-on-wet process.

[0101] Furthermore, the adhesive cleaner of the present invention is not limited to the described embodiment. Additionally, the adhesive cleaner of the present invention is not limited to the described effects. Various modifications can be made to the adhesive cleaner of the present invention without departing from the spirit of the invention.

[0102] For example, the adhesive portion and the protruding portion can also be made of the same polymer composition, and the adhesive portion and the protruding portion can also be integrally formed.

[0103] Furthermore, although in the above embodiment the protrusion 212 is formed on the adhesive portion 211, the protrusion 212 can also be formed on the surface of the substrate 22. Thus, the hardness of the protrusion 212 can be changed by the material on which it is formed. Specifically, the hardness of the protrusion 212 formed on the relatively low-hardness adhesive portion 211 will be lower, while the hardness of the protrusion 212 formed on the relatively high-hardness surface of the substrate 22 will be higher.

[0104] Example

[0105] The present invention will be further described below by way of examples.

[0106] (Preparation of the first composition constituting the adhesive portion)

[0107] The following raw materials are mixed to prepare a rubber-based adhesive (SIS-based adhesive composition) for forming the adhesive part.

[0108] Base polymer: Styrene-isoprene-styrene block copolymer (SIS)

[0109] Product name (Quintac3520) manufactured by Zeon Corporation of Japan / 100 parts

[0110] Tackifying resin: Unhydrogenated hydrocarbon resin

[0111] ENEOS manufactured product name (T-REZ RC093) / 130 parts by weight

[0112] Plasticizer: Naphthenic processing oil

[0113] Diana Process Oil NS90S, manufactured by Idemitsu Kosan Co., Ltd. / 100 parts by weight

[0114] (Preparation of the second composition constituting the protrusion)

[0115] Base polymer: 100 parts by weight of ABA-type acrylic block copolymer (hard block: MMA, soft block: BA / 2EHA (approximately 50 / 50), hard block to soft block mass ratio 18 / 82).

[0116] Filler: 160 parts by weight of masterbatch containing calcium carbonate particles and polyethylene resin at a mass ratio of 8:2 (128 parts by weight of calcium carbonate particles).

[0117] Acrylic oligomer: 50 parts by weight of "ARUFON UP-1000" (Mw: approx. 3000) manufactured by Dong-A Synthetic Co., Ltd.

[0118] (Example of adhesive tape manufacturing)

[0119] As a substrate, a sheet (160 mm wide) is prepared by laminating one side of a paper sheet with a polyethylene film. The first and second compositions prepared above are molten and coated onto the substrate using a die-coating machine. It should be noted that the first composition is directly coated onto the unlaminated surface, and the molten second composition is coated onto the coating film formed from the molten first composition. Furthermore, the width of each pair of non-adhesive portions is set to 5 mm, and the width of the surface layer is set to 150 mm.

[0120] (Evaluation 1: Mobility on the floor)

[0121] The drum body is rotated at 30 m / min, and evaluated according to the following evaluation criteria.

[0122] (Evaluation Criteria)

[0123] ○: The adhesive tape does not adhere to the floor, allowing for excellent mobility.

[0124] ×: Adhesive tape is attached to the floor, resulting in poor mobility.

[0125] (Evaluation 2: Mobility on carpet)

[0126] The evaluation is based on the resistance value (N / 160mm) when the drum body is rolled at 30m / min.

[0127] (Evaluation 3: Foreign object capture capability on carpet)

[0128] Colored sand, acting as a foreign object, was sprinkled onto the carpet, and the roll was rolled until no more colored sand adhered. The difference in mass of the roll before and after the colored sand adhered was taken as the amount of foreign object adhered, and converted to the amount adhered per unit area. Additionally, the amount of colored sand that fell off when the outermost portion of the roll with the adhered colored sand was peeled off was observed, and converted to the amount of sand that fell off per unit area. Based on these converted values ​​of adhesion and amount of sand falling off, the foreign object capture performance was evaluated.

[0129] [Table 1]

[0130]

[0131] The matters disclosed in this specification include the following.

[0132] (1) An adhesive cleaner comprising adhesive tape,

[0133] The adhesive tape is formed into a roll with the surface portion facing outwards.

[0134] The roll body is configured to roll while the surface portion is in contact with the object being cleaned.

[0135] The surface layer has an adhesive portion and a plurality of protruding portions. The adhesive portion has an adhesive surface, and the plurality of protruding portions protrude radially outward from the adhesive surface onto the roll body.

[0136] The plurality of protrusions are spaced apart from each other and extend in the same direction.

[0137] The width of each protrusion is 0.4 mm or more and 2 mm or less, and the number of protrusions with a width of 10 mm or more is 0.5 or more and 4 or less.

[0138] (2) The adhesive cleaner as described in (1), wherein the hardness of the adhesive portion is less than or equal to the hardness of the protruding portion.

[0139] (3) The adhesive cleaner as described in (1) or (2), wherein the surface portion of the roll body has a hardness of 70 or less as measured by an ASKER C-type hardness tester.

[0140] (4) An adhesive cleaner as described in any one of (1) to (3), wherein the protrusion protrudes more than 20 μm outward relative to the adhesive surface of the roll body.

[0141] (5) An adhesive cleaner as described in any one of (1) to (4), wherein the adhesive portion is composed of a plurality of linear portions that are spaced apart from each other and extend in the same direction as the extension direction of the protruding portion.

[0142] The plurality of protrusions are formed on each linear portion, and adjacent protrusions are separated from each other by an amount at least equivalent to the interval between the plurality of linear portions.

[0143] (6) An adhesive cleaner as described in any one of (1) to (5), wherein the adhesive portion is made of hot melt adhesive.

[0144] Explanation of reference numerals in the attached figures

[0145] 1: Adhesive cleaner, 10: Roll assembly, 20: Adhesive tape, 20r: Roll body, 21: Surface layer, 21a: First contact surface, w1, w2: Width, 21b: Second contact surface, 21c: Third contact surface, 211: Adhesive portion, W: Width, 212: Protrusion, 213: Groove, d1, d2: Spacing, 22: Substrate, 221: Support layer, 222: Easy-peel layer, 23: Easy-cut line, 24: Non-adhesive portion, 30: Shaft assembly, 31: Operating shaft, 40: Grip assembly, D1: Length direction, D2: Width direction, D3: Thickness direction.

Claims

1. An adhesive cleaner comprising adhesive tape, The adhesive tape is formed into a roll with the surface portion facing outwards. The roll body is configured to roll while the surface portion is in contact with the object being cleaned. The surface layer has an adhesive portion and a plurality of protruding portions. The adhesive portion has an adhesive surface, and the plurality of protruding portions protrude radially outward from the adhesive surface onto the roll body. The plurality of protrusions are spaced apart from each other and extend in the same direction. The width of each protrusion is 0.4 mm or more and 2 mm or less, and the number of protrusions with a width of 10 mm or more is 0.5 or more and 4 or less.

2. The adhesive cleaner according to claim 1, wherein, The hardness of the adhesive portion is lower than that of the protruding portion.

3. The adhesive cleaner according to claim 1 or 2, wherein, The surface layer of the roll body has a hardness of 70 or less as measured by an ASKERC type hardness tester.

4. The adhesive cleaner according to claim 1 or 2, wherein, The protruding part protrudes more than 20 μm radially outward relative to the adhesive surface of the roll body.

5. The adhesive cleaner according to claim 1 or 2, wherein, The adhesive portion is composed of multiple linear portions, which are spaced apart from each other and extend in the same direction as the extending direction of the protruding portion. The plurality of protrusions are formed on each linear portion, and adjacent protrusions are separated from each other by an amount at least equivalent to the interval between the plurality of linear portions.

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

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