Rolled cleaning adhesive tape

Abstract

To provide a cleaning adhesive tape having excellent dirt attaching property and hand tearability.SOLUTION: An aspect of the present invention is a rolled cleaning adhesive tape 10. The rolled cleaning adhesive tape 10 has a structure that a laminate having a supporting body 20 and an adhesive layer 30 formed on one main surface of the supporting body 20 is wound in a rolled state. The supporting body 20 is formed of a synthetic resin fiber having an average fiber length 1 to 20 mm, and consists of a nonwoven fabric having a basis weight 20 to 60 g / m2. On the other main surface of supporting body 20, linear recessed parts 40 which do not penetrate the nonwoven fabric are formed in the winding direction at a predetermined interval in a width direction perpendicular to a winding direction of the tape. The depth D of the recessed parts 40 is 5 to 60% depth to the thickness of the supporting body 20, the predetermined interval of the recessed parts 40 is 0.5 to 1.5 mm.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an adhesive tape for roll-shaped cleaning.

Background Art

[0002] As an adhesive tape for removing and cleaning fine dirt, dust, etc., an adhesive tape having a layer structure in which an adhesive layer is provided on one side of a support made of paper, cloth, plastic film, etc. is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Plastic films are excellent in toughness, stress relaxation, printability, etc. However, since plastic films have insufficient flexibility, there is a problem that it is difficult to remove fine dust etc. when used as a support for an adhesive tape for cleaning. On the other hand, non-woven fabrics are excellent in flexibility and are suitable as a support for an adhesive tape for roll-shaped cleaning. However, an adhesive tape with a non-woven fabric support is generally difficult to cut by hand, and even if it can be cut by hand, there is a problem that the cutting line becomes an irregular line or a line unintended by the user. In view of the above problems, the present invention aims to provide an adhesive tape for cleaning that has good dust adhesion and cutability.

Means for Solving the Problems

[0005] One aspect of the present invention is an adhesive tape for roll-shaped cleaning. The roll-shaped adhesive tape for cleaning has a laminate having a support and an adhesive layer formed on one main surface of the support, which is wound in a roll shape. The support is formed of synthetic resin fibers having an average fiber length of 1 to 20 mm and a basis weight of 20 to 60 g / m 2 and is made of a non-woven fabric. On the other main surface of the support, linear recesses that do not penetrate the non-woven fabric are formed at predetermined intervals in the winding direction of the tape in the width direction perpendicular to the winding direction of the tape. The depth of the recess is 5 to 60% of the thickness of the support, and the predetermined interval of the recess is 0.5 to 1.5 mm.

[0006] In the roll-shaped adhesive tape for cleaning of the above aspect, the thickness of the non-woven fabric may be 50 to 200 μm. The material of the non-woven fabric may be one or more selected from the group consisting of polyolefin, polyester, polyamide, and polyurethane. The non-woven fabric may be manufactured by the airlaid method. Also, the adhesive force of the roll-shaped adhesive tape for cleaning with a width of 25 mm to the BASUS plate measured according to Japanese Industrial Standard JIS Z 0237 may be 0.5 to 1.7 N / cm.

Effect of the Invention

[0007] According to the present invention, there is provided a roll-shaped adhesive tape for cleaning that has good dust adhesion and tearability.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described in detail. In this specification, the notation "a to b" in the description of a numerical range represents a to b unless otherwise specified.

[0010] (Roll-shaped cleaning adhesive tape) FIG. 1(a) is a schematic plan view of a roll-shaped cleaning adhesive tape according to an embodiment. FIG. 1(b) is a schematic cross-sectional view of the roll-shaped cleaning adhesive tape along the tape winding direction. FIG. 1(c) is an enlarged schematic cross-sectional view of the roll-shaped cleaning adhesive tape along the tape winding direction. As shown in FIG. 1(b), the roll-shaped cleaning adhesive tape (hereinafter sometimes simply referred to as "adhesive tape") 10 according to the embodiment has a structure in which a laminate having a support 20 and an adhesive layer 30 formed on one main surface of the support is wound in a roll shape. The support 20 constituting the adhesive tape according to the embodiment is formed of a nonwoven fabric.

[0011] The nonwoven fabric used for the adhesive tape according to the embodiment is made of synthetic resin fibers having an average fiber length of 1 to 20 mm and a fineness of 1 to 30 denier. When the fiber length is 1 mm or more, sufficient strength can be obtained when forming the nonwoven fabric sheet, and when the fiber length is 20 mm or less, the number of bonding points between the fibers can be appropriately maintained, thereby improving the hand-cutability. When the fineness is 1 denier or more, the workability can be improved by maintaining the body of the nonwoven fabric, and when it is 30 denier or less, the flexibility can be improved by suppressing the body from becoming too stiff. The basis weight of the nonwoven fabric is 20 to 60 g / m 2is preferable, and its thickness is preferably 50 to 200 μm. As the fiber to be used, any synthetic fiber having a property of melting with heat may be used, and examples of its material include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate (PET), nylon (polyamide), polyurethane, and the like. It is also possible to blend wood pulp or the like in an arbitrary ratio for these fibers, for example, for the purpose of softening the texture. When blending wood pulp, it is desirable that the ratio of synthetic fiber to wood pulp be within the range of 99:1 to 70:30 (weight ratio).

[0012] In the adhesive tape according to the embodiment, when using a non-woven fabric manufactured by an airlaid process capable of making the longitudinal and transverse orientation of the fibers uniform, since the fibers are appropriately cut by thermal perforation, it is advantageous for hand-cutability. However, as long as the fibers and the non-woven fabric satisfy the above conditions, non-woven fabrics manufactured by other processes can also be used. On the other hand, a non-woven fabric manufactured by a process in which the fiber length is substantially infinite, such as a spunbond non-woven fabric, is not preferable because the fibers are not appropriately cut by thermal perforation.

[0013] The basis weight of the non-woven fabric used for the adhesive tape according to the embodiment is preferably 20 to 60 g / m 2 is preferable, and 30 to 50 g / m 2 is more preferable. By the basis weight being 20 g / m 2 or more, the body of the non-woven fabric can be made sufficient, and thus the handling property can be improved. By the basis weight being 60 g / m 2 or less, the flexibility of the non-woven fabric is maintained by appropriately keeping the number of thermal adhesion points between the fibers, and thus the cutability can be improved.

[0014] The nonwoven fabric used for the adhesive tape according to the embodiment preferably has a thickness of 50 to 200 μm, more preferably 80 to 150 μm. When the thickness is 50 μm or more, the distance between the fibers constituting the nonwoven fabric can be sufficiently ensured, and the flexibility of the nonwoven fabric can be maintained by appropriately maintaining the number of thermal adhesion points between the fibers, thereby improving the cutability. On the other hand, when the thickness is 200 μm or less, it is possible to suppress the distance between the fibers constituting the nonwoven fabric from becoming too long, and by sufficiently ensuring the number of thermal adhesion points between the fibers, the strength of the nonwoven fabric can be sufficiently maintained. The thickness of the nonwoven fabric can be measured in a state where a pressure of 1 kPa is applied to the nonwoven fabric in accordance with Japanese Industrial Standard JIS L 1096.

[0015] In the adhesive tape according to the embodiment, on the other main surface of the support, linear recesses that do not penetrate the nonwoven fabric are formed at predetermined intervals in the winding direction of the tape in the width direction perpendicular to the winding direction of the tape (Fig. 1(a)). The depth D of the recess 40 is 5 to 60% of the thickness of the support, and the predetermined interval L of the recess 40 is 0.5 to 1.5 mm (see Fig. 1(b) and Fig. 1(c)). The cross-sectional shape of the recess 40 is not particularly limited, but is (substantially) triangular or (substantially) rectangular. The recess 40 may be provided in a direction perpendicular to the winding direction of the tape, and may extend continuously or be scattered.

[0016] By forming linear recesses in the nonwoven fabric used for the adhesive tape according to the embodiment at predetermined intervals in the winding direction, the adhesive tape can be easily cut linearly. Examples of the method for forming the recesses include thermal perforation. By controlling the degree of the recessed portion, the cutability can be controlled. The depth of each recessed portion formed by the recessed portion does not necessarily have to be uniform, but it is preferably within the range of 5 to 60% with respect to the thickness of the support (non-woven fabric). By setting the depth of the recessed portion to 60% or less, the tensile strength of the adhesive tape can be sufficiently ensured, and by setting the depth of the recessed portion to 5% or more, hand-cutability can be imparted. The depth of the recessed portion means the depth of the recessed portion from the surface of the support. The depth of the recessed portion can be measured by cutting the adhesive tape along the tape winding direction and taking a photograph of the cross-section of the recessed portion.

[0017] The interval between each recessed portion (the interval between adjacent recessed portions) is in the range of 0.5 to 1.5 mm, preferably in the range of 0.7 to 1.3 mm. When the gap between each recessed portion is 1.5 mm or less, it is possible to cut at a desired location without checking the cutting position when hand-cutting. By setting the gap between each recessed portion to 0.5 mm or more, it is possible to suppress interference between adjacent recessed portions and reduce the possibility that the cut edge becomes oblique as a result of cutting across a plurality of recessed portions when hand-cutting. From the viewpoint of hand-cutability, the intervals between the recessed portions are preferably equally spaced along the tape winding direction. The interval between each recessed portion refers to the distance along the tape winding direction between the deepest parts of adjacent recessed portions.

[0018] As a method of forming a recessed portion by thermal punching, processing with a heating blade, processing by laser irradiation, processing with a heated embossing roll, etc. can be adopted. Among these, the method of using a heated embossing roll is preferable. For example, a heated embossing roll having a linear continuous pattern protruding in the circumferential direction of the roll at a predetermined interval in the width direction of the roll and an anvil roll having a smooth surface are arranged to face each other, and a support body which is a non-woven fabric is sandwiched between these rolls and passed through, whereby a linear recessed portion can be formed in the support body. At this time, it is not necessary to apply pressure to the non-woven fabric support body by the roll. The depth of the recessed portion formed by thermal punching can be adjusted by the distance between the embossing roll and the anvil roll. As the embossing roll, a metal roll is used. As the anvil roll, a stainless steel roll with a smooth surface, a rubber roll with a smooth surface having a silicon rubber coated on a core metal, etc. can be used.

[0019] The embossing roll needs to be heated to a temperature at which the synthetic fibers forming the non-woven fabric melt. The embossing roll is usually preferably heated to a temperature between about 150°C and about 300°C. The anvil roll does not need to be heated, but if necessary, it may be heated to the same temperature as the embossing roll in order to avoid the thermal influence on the embossing roll.

[0020] By performing embossing on the non-woven fabric with the temperature of the protruding portion on the surface of the embossing roll being equal to or higher than the melting point of the fiber, the fibers melt in the thickness direction of the non-woven fabric and are formed into a film or cut, and recessed portions are generated in the thickness direction of the non-woven fabric. In this recessed portion, the tear strength is reduced because the fibers are partially cut. Therefore, cutting of the adhesive tape easily occurs along this recessed portion, and the adhesive tape can be cut substantially linearly.

[0021] The cross-sectional shape of the recess formed by thermal punching is not particularly limited as long as it does not hinder the hand-cutting property. However, in the case of thermal punching using a heated embossing roll, it is preferable to form a recess with a cross-sectional shape of a triangular roof type that is approximately triangular, such as an equilateral triangle or an isosceles triangle, from the viewpoints of ensuring the cut-off property and ease of manufacturing.

[0022] Examples of the adhesive used for the adhesive layer include acrylic adhesives, rubber adhesives, and silicone adhesives.

[0023] Examples of the acrylic adhesive include homopolymers or copolymers of long-chain (meth)acrylic acid ester monomers having about 4 to 12 carbon atoms, such as butyl acrylate, 2-ethylhexyl acrylate, and isononyl acrylate, or copolymers mainly composed of (meth)acrylic acid ester monomers and copolymerizable with one or more other monomers such as (meth)acrylic acid, vinyl acetate, styrene, vinyl pyrrolidone, acrylamide, hydroxyethyl acrylate, and hydroxypropyl acrylate in the range of 2 to 50% by mass. And copolymers obtained by copolymerizing one or more of the other monomers within the range of 2 to 50% by mass are included.

[0024] The acrylic adhesive may be a solvent type obtained by polymerizing the monomers in an organic solvent such as toluene, hexane, or ethyl acetate using a peroxide such as benzoyl peroxide as an initiator under a nitrogen atmosphere, or an emulsion type obtained by emulsifying and dispersing the monomers in water with an emulsifier and then polymerizing. After polymerization, it is preferable to crosslink the polymer by adding an appropriate amount of a polyfunctional resin such as an epoxy resin to the acrylic adhesive before coating on a sheet or film support.

[0025] Examples of the rubber adhesive include compositions obtained by blending a rubber base such as synthetic polyisoprene rubber or a styrene-isoprene-styrene block copolymer with a tackifier resin, a softening agent, and the like.

[0026] The thickness of the adhesive layer is usually 10 to 200 μm, preferably 20 to 100 μm. The adhesive force of the adhesive is adjusted so that the adhesive force (peeling force) of the adhesive tape against the BASUS board (the adhesive force of the 25 mm wide adhesive tape against the BASUS board measured according to the "180-degree peeling method" of JIS Z 0237) is preferably in the range of 0.5 to 1.7 N / cm, more preferably 0.7 to 1.5 N / cm.

[0027] The application of the adhesive can be carried out by directly applying an adhesive liquid using an organic solvent or water as a medium onto a support by an application device such as a reverse roll coater, comma roll coater, bar coater, etc. Alternatively, the adhesive liquid can be applied onto a paper support such as high-quality paper or glassine paper treated with a release agent such as silicone resin, or a so-called separator sheet such as a polyester film, dried in a hot air device, and then a support is bonded onto the adhesive layer to transfer the adhesive layer onto one side of the support.

[0028] Examples of the release agent that can be used in this embodiment include long-chain alkyl group pendant type release agents and silicone-based release agents. Examples of long-chain alkyl group pendant type release agents include copolymers of linear alkyl group-containing monomers having 12 or more carbon atoms such as stearyl acrylate, stearyl acrylamide, and stearyl vinyl ether, and acrylic acid, vinyl acetate, acrylonitrile, etc.; modified polymers obtained by pendantizing polymers such as polyvinyl alcohol with long-chain alkyl components such as alkyl acyl chloride and alkyl isocyanate. Fluorine-based release agents obtained by replacing the hydrogen atoms of these alkyl groups with fluorine atoms can also be used. Examples of silicone-based release agents include those obtained by cross-linking using polydimethylsiloxane as a base polymer and blending polymethylhydrogen siloxane, etc. The cross-linking reaction is roughly classified into a condensation type and an addition type.

[0029] Thereafter, the separator sheet is removed, and the tape is wound into a roll such that the adhesive layer is in direct contact with the back surface of the support. The winding is performed under loose conditions on a core material such as a paper tube so as not to apply excessive tension. In the winding process, the tape can be made into a roll-shaped cleaning adhesive tape by cutting it to a predetermined width with a slitter and then winding it to a fixed length, or by cutting a semi-finished product wound to a fixed length to a predetermined width with a core cutter.

[0030] The embodiments of the present invention have been described above, but these are merely examples of the present invention, and various configurations other than those described above can also be adopted.

Example

[0031] Hereinafter, the present invention will be described with reference to examples and comparative examples, but the present invention is not limited thereto.

[0032] <Test method> (1) Test atmosphere: The test atmosphere was adjusted to a temperature of 23 ± 1°C and a relative humidity of 50 ± 5%, and various characteristics were measured. The samples were conditioned in the same atmosphere for 24 hours in advance.

[0033] [Example 1] (Method for manufacturing an adhesive tape) Wood pulp was mixed with polyester fibers having an average fiber length of 5 mm and a fineness of 2 denier (PET / pulp = 8:2), and a non-woven fabric having a basis weight of 40 g / m 2 and a thickness of 100 μm was used as a support. This non-woven fabric was manufactured by the air-laid method.

[0034] An acrylic-based adhesive (a copolymer of 83% by mass of isononyl acrylate, 16% by mass of methoxy nonaethylene glycol acrylate, and 1% by mass of nonaethylene glycol methacrylate) solution was coated on a separator sheet so that the weight after drying was 30 g / m 2 The above support (non-woven fabric) was bonded and adhered onto the adhesive layer thus formed to obtain an adhesive tape.

[0035] An embossing roll with a width of 300 mm and a diameter of 200 mm was used, on which triangular roof-shaped straight protrusions with a height of 400 μm and a base of 500 μm were protruding such that the distance between adjacent triangles was 500 μm. The heated embossing roll was opposed to an anvil roll with a smooth surface at room temperature, and the adhesive tape was passed between the two rolls while contacting the separator sheet side with the anvil roll, thereby applying a triangular roof-shaped pattern to the opposite side (support body side) of the adhesive-applied surface. The embossing roll was heated to 270 °C. The formed recesses were at a pitch of 1 mm in the tape winding direction (length direction; MD), and the depth of the recesses was 30 to 50 μm. The depth of the recesses indicates the range when the depths of 20 recesses were measured at intervals of 10 cm in the winding direction.

[0036] The adhesive tape thus produced was wound around a 1-inch diameter paper tube with a length of 7 m while peeling off the separator sheet, cut to a width of 25 mm, and a straight-wound roll-shaped adhesive tape for cleaning was produced.

[0037] [Example 2] As the support, only polyester fibers with an average fiber length of 5 mm and a fineness of 2 denier were used, and a non-woven fabric with a basis weight of 35 g / m 2 and a thickness of 90 μm was used, and a roll-shaped adhesive tape for cleaning was produced in the same manner as in Example 1.

[0038] [Example 3] As the support, only polypropylene fibers with an average fiber length of 3 mm and a fineness of 1.5 denier were used, and a non-woven fabric with a basis weight of 40 g / m 2 and a thickness of 120 μm was used, and the temperature of the embossing roll was set to 150 °C, and a roll-shaped adhesive tape for cleaning was produced in the same manner as in Example 1.

[0039] [Example 4] As the support, wood pulp and tencel were mixed with polyester fibers with an average fiber length of 8 mm and a fineness of 7 denier (PET / pulp / tencel = 8:1:1), and the basis weight was 40 g / m 2A roll-shaped cleaning adhesive tape was produced in the same manner as in Example 1, except that a non-woven fabric with a thickness of 150 μm was used.

[0040] [Comparative Example 1] A roll-shaped cleaning adhesive tape was produced in the same manner as in Example 1, except that a sheet-shaped base material (width: about 10 cm) made of PET with a thickness of 38 μm was used as the support. The adhesive body thus obtained was wound around the surface of a cylindrical support made of cardboard with a diameter (outer diameter) of 35 mm at least 5 turns or more so as to form an adhesive sheet roll. Then, the adhesive sheet roll was rotatably attached to the tip rotating shaft portion of the gripping member to construct an adhesive sheet roll (adhesive cleaner) (see Figure 2). Furthermore, a cut for cutting (not shown) was provided approximately every one circumference of the adhesive sheet roll.

[0041] [Comparative Example 2] A commercially available wet tissue was used as Comparative Example 2. It may be a water-insoluble tissue paper (non-woven fabric) containing an aqueous solution such as alcohol or sodium hypochlorite.

[0042] [Comparative Example 3] A roll-shaped cleaning adhesive tape was produced in the same manner as in Example 1, except that a sheet-shaped base material (width: about 5 cm) made of PET with a thickness of 38 μm was used as the support. During use, it was cut to an appropriate length with scissors or the like and used in a cylindrical (loop-shaped) manner with the adhesive surface facing outward (see Figure 3).

[0043] [Comparative Example 4] As the support, a polyethylene film with a thickness of 50 μm was folded, and both edge portions of this sheet material were welded to form an enclosure having an insertion portion into which fingers can be inserted. The adhesive layer is the same adhesive liquid as in Example 1, and after drying on the separator sheet, the weight is 30 g / m 2It was applied so as to achieve this. The adhesive layer thus formed was bonded to the front and back surfaces of the above-mentioned support (a surrounding body having an insertion part into which a finger can be inserted), and adhered to be used as a bag-shaped adhesive sheet (see Fig. 4).

[0044] [Comparative Example 5] As the support, a non-woven fabric made of the same material as that in Example 1 (with the same thickness and basis weight) but not subjected to thermal perforation by the air-laid method was used. In order to impart hand-cutability, a cut mark (not shown) for cutting was provided approximately every one circumference of the roll-shaped cleaning adhesive tape. Otherwise, a roll-shaped cleaning adhesive tape was produced in the same manner as in Example 1 (see Fig. 5).

[0045] <Ease of tearing (sensory evaluation)> The ease of tearing of each cleaning adhesive tape was evaluated according to the following evaluation criteria. The results obtained for the ease of tearing are shown in Table 1. 〇: It can be torn smoothly. △: It can be torn, but the cutting edge is not good. ×: It is difficult to tear by hand.

[0046] <Freedom in length> The freedom in length of each cleaning adhesive tape was evaluated according to the following evaluation criteria. The results obtained for the freedom in length are shown in Table 1. 〇: It can be freely cut according to the required length. ×: It can only be cut approximately every one circumference of the roll-shaped cleaning adhesive tape.

[0047] <Dust adhesion performance (visual confirmation)> The dust adhesion performance of each cleaning adhesive tape was evaluated according to the following evaluation criteria. The results obtained for the dust adhesion performance are shown in Table 1. 〇: Fine dirt (dust) can be surely removed. △: Fine dirt (dust) cannot be completely removed, and there is uneven removal. ×: Almost no fine dirt (dust) can be removed.

[0048]

Table 1

Industrial Applicability

[0049] The roll-shaped adhesive tape for cleaning of the present invention has good dust adhesion and tearability, and can be cut straight at a desired position, and is useful as a cleaning tape.

Explanation of Signs

[0050] 10 Roll-shaped adhesive tape for cleaning, 20 Support, 30 Adhesive layer, 40 Concave portion

Claims

1. a support; an adhesive layer formed on one main surface of the support; The laminate having the above is wound in a roll shape, The support is made of synthetic resin fibers with an average fiber length of 1 to 20 mm and has a basis weight of 20 to 60 g / m ２ and consists of a nonwoven fabric, On the other main surface of the support, in the width direction perpendicular to the winding direction of the tape, linear recesses that do not penetrate the non-woven fabric are formed at predetermined intervals in the winding direction, A roll-shaped cleaning adhesive tape, wherein the depth of the recess is 5 to 60% of the thickness of the support, and the predetermined interval of the recess is 0.5 to 1.5 mm.

2. The roll-shaped cleaning adhesive tape according to claim 1, wherein the thickness of the non-woven fabric is 50 to 200 μm.

3. The roll-shaped cleaning adhesive tape according to claim 1, wherein the material of the non-woven fabric is one or more selected from the group consisting of polyolefin, polyester, polyamide, and polyurethane.

4. The roll-shaped cleaning adhesive tape according to claim 1, wherein the non-woven fabric is manufactured by an airlaid method.

5. The roll-shaped cleaning adhesive tape according to claim 1, wherein the adhesive force of the roll-shaped cleaning adhesive tape having a width of 25 mm to a BASUS plate measured according to Japanese Industrial Standard JIS Z 0237 is 0.5 to 1.7 N / cm.

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