JP2006075502A - Adhesive dust removing cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive dust removing cleaner formed with a foaming adhesive layer with excellent adhesiveness on a base material and having good follow-up property to an uneven surface of a dust removal object. <P>SOLUTION: The adhesive dust removing cleaner has an adhesive tape wound body constituted by winding an adhesive tape formed with an adhesive layer on one side of the base material, around a core material into roll shape with the adhesive layer side face placed outside. The adhesive layer in the adhesive tape has a laminated structure of the foaming adhesive layer located on the surface side and including a foamed foaming agent, and a non-foaming adhesive layer located on the base material side and not including a foaming agent. The foaming adhesive layer in the adhesive layer contains the foamed foaming agent at a rate of 3-50 wt% to the total quantity of the foaming adhesive layer and is expanded into volume of 2-30 times of the volume before foaming. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pressure-sensitive adhesive dust cleaner, and more specifically, a pressure-sensitive adhesive dust cleaner having excellent adhesion between a base material and a pressure-sensitive adhesive layer in a pressure-sensitive adhesive tape, and having good followability to an uneven surface of a dust removal object. About.

  As a method for removing dust and dirt, a method using a so-called “rotary adhesive dust cleaner” in which an adhesive tape provided with an adhesive layer on one side of a support is wound in a roll shape with the adhesive layer facing outward. Is well known. The rotary adhesive dust cleaner is a roll of adhesive tape wound around the surface of the object to be removed to remove dust and debris adhering to the surface of the object to be removed. By adhering to the dust, dust and dirt on the surface of the dust removal object can be removed.

  As such a rotary adhesive dust cleaner, for the purpose of improving the followability to the uneven surface of the dust removal object, the one having a foamed adhesive layer containing hollow particles (hollow beads), The thing which has the adhesive layer which becomes uneven | corrugated etc. is proposed (refer patent document 1-patent document 4).

  However, the foamed pressure-sensitive adhesive layer in the rotary pressure-sensitive dust cleaner is a foamed pressure-sensitive adhesive layer formed on a substrate and then foamed by heating or the like to form a foamed pressure-sensitive adhesive layer. There was a problem that floating occurred between the material and the foamed pressure-sensitive adhesive layer, and the adhesion between the base material and the foamed pressure-sensitive adhesive layer was likely to be lowered.

Utility Model Registration No. 2530113 Utility Model Registration No. 2539129 JP-A-5-171116 JP 2003-339617 A

  Therefore, even if the object of the present invention is to form a foamed pressure-sensitive adhesive layer by foaming a non-foamed pressure-sensitive adhesive layer on the substrate, the foamed pressure-sensitive adhesive layer is excellent on the substrate. An object of the present invention is to provide an adhesive dust cleaner that is formed with close contact and has good followability to the uneven surface of a dust removal object.

  As a result of intensive studies to achieve the above object, the present inventors have made the adhesive layer a laminate of a foamed adhesive layer and a non-foamed adhesive layer. Even when the non-foamed pressure-sensitive adhesive layer is formed and then foamed, the substrate and the pressure-sensitive adhesive layer can be laminated with excellent adhesion, and the pressure-sensitive adhesive layer Has found that it is possible to exhibit excellent followability to the uneven surface of the dust removal object. The present invention has been completed based on these findings.

  That is, the present invention is a pressure-sensitive adhesive tape winding body in which a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on one side of a substrate is wound around a core material in a roll shape with the surface on the pressure-sensitive adhesive layer side facing outside. A pressure-sensitive adhesive dust cleaner comprising: a pressure-sensitive adhesive layer in the pressure-sensitive adhesive tape located on the surface side and containing a foamed foaming agent; and a material located on the substrate side and containing the foaming agent. The non-foamed pressure-sensitive adhesive layer is laminated, and the foamed pressure-sensitive adhesive layer in the pressure-sensitive adhesive layer is 3 to 50% by weight of the foamed foaming agent relative to the total amount of the foamed pressure-sensitive adhesive layer. The adhesive dust cleaner is characterized in that it has a constitution that is contained at a ratio of% and expanded to a volume of 2 to 30 times the volume before foaming.

  As the pressure-sensitive adhesive tape, after forming a non-foamed pressure-sensitive adhesive layer on a base material, a pressure-sensitive adhesive composition containing a foaming agent in an unfoamed state is applied onto the non-foamed pressure-sensitive adhesive layer, and foamed and foamed. It is preferable that it is produced by forming an agent layer.

  In the present invention, the ratio between the thickness of the foamed pressure-sensitive adhesive layer and the thickness of the non-foamed pressure-sensitive adhesive layer is such that the thickness of the foamed pressure-sensitive adhesive layer / the thickness of the non-foamed pressure-sensitive adhesive layer = 30/1 to 2/1. preferable. Moreover, as thickness of a non-foaming adhesive layer, 0.5-5 micrometers may be sufficient.

  According to the pressure-sensitive adhesive dust cleaner of the present invention, even when the foamed pressure-sensitive adhesive layer is formed by foaming a non-foamed pressure-sensitive adhesive layer on the substrate, the foamed pressure-sensitive adhesive layer is formed on the substrate. In addition to being formed with excellent adhesion, it has good followability to the uneven surface of the dust removal object.

(Adhesive dust cleaner)
The pressure-sensitive adhesive dust cleaner according to the present invention has a pressure-sensitive adhesive tape wound with a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on one side of a base material and wound in a roll shape with the surface on the pressure-sensitive adhesive layer side facing outward. The pressure-sensitive adhesive layer in the pressure-sensitive adhesive tape is located on the surface side and includes a foamed foaming agent layer, and is located on the substrate side and includes the foaming agent. The non-foamed pressure-sensitive adhesive layer has a laminated structure, and the foamed pressure-sensitive adhesive layer in the pressure-sensitive adhesive layer is 3 to 50% by weight based on the total amount of the foamed pressure-sensitive adhesive layer. And a volume expanded to 2 to 30 times the volume before foaming.

  Thus, the adhesive dust cleaner has a configuration in which the pressure-sensitive adhesive layer is laminated with the foamed pressure-sensitive adhesive layer and the non-foamed pressure-sensitive adhesive layer in a form in which the non-foamed pressure-sensitive adhesive layer is located on the substrate side (that is, the foamed pressure-sensitive adhesive). The layer is formed on the base material via the non-foamed pressure-sensitive adhesive layer), so that even if foaming is performed on the base material to form the foamed pressure-sensitive adhesive layer, the non-foamed pressure-sensitive adhesive layer It can be formed in a state where the foamed adhesive layer is closely adhered on the non-foamed pressure-sensitive adhesive layer without causing floating or the like between the foamed pressure-sensitive adhesive layer and the non-foamed pressure-sensitive adhesive layer due to adhesive force and deformation. The foamed pressure-sensitive adhesive layer and the non-foamed pressure-sensitive adhesive layer can be formed as an integrated pressure-sensitive adhesive layer. In addition, the non-foamed pressure-sensitive adhesive layer maintains a state of being intimately adhered to the base material, and the foaming pressure-sensitive adhesive layer is formed between the non-foamed pressure-sensitive adhesive layer and the base material by foaming during the formation of the foamed pressure-sensitive adhesive layer. There is no floating. Therefore, the pressure-sensitive adhesive dust cleaner of the present invention has excellent adhesion between the base material and the pressure-sensitive adhesive layer (the pressure-sensitive adhesive layer formed by the foamed pressure-sensitive adhesive layer and the non-foamed pressure-sensitive adhesive layer) in the pressure-sensitive adhesive tape, There is no floating or the like between the adhesive layer.

  Moreover, the pressure-sensitive adhesive dust cleaner has a pressure-sensitive adhesive layer surface of the pressure-sensitive adhesive tape in which the foamed foaming agent is contained in a proportion of 3 to 50% by weight with respect to the total amount of the foamed pressure-sensitive adhesive layer and 2% of the volume before foaming. Because it has a surface with a foamed adhesive layer having a configuration expanded to 30 times the volume, it has excellent cushioning properties (flexibility, easy deformation, etc.). It is easy to deform due to elastic deformation, can exhibit excellent followability with respect to the uneven surface of the dust removal object, and can perform dust removal with excellent dust removal performance. Specifically, the surface of the foamed adhesive layer can be brought into contact with the convex surface of the dust removal object by simply contacting the convex portion without pressing the adhesive dust removing cleaner. Thus, dust existing on the surface of the convex portion can be adhered to the surface of the foamed adhesive layer and removed. On the other hand, by pressing an adhesive dust cleaner against the concave portion of the dust removal object, the surface of the foamed adhesive layer can be brought into contact with the surface of the concave portion of the dust removal object. Can be removed by adhering dust existing on the surface of the foamed adhesive layer.

(Adhesive tape)
As shown in FIG. 1, the pressure-sensitive adhesive tape has a configuration in which a pressure-sensitive adhesive layer is formed on one side of a base material, and the pressure-sensitive adhesive layer includes a foamed pressure-sensitive adhesive containing a foamed foaming agent. An adhesive layer and a non-foamed adhesive layer not containing a foaming agent are laminated in a form in which the foamed adhesive layer is located on the surface side (that is, a form in which the non-foamed adhesive layer is located on the substrate side). It has the structure which was made. The pressure-sensitive adhesive tape is used by winding the core material in a roll shape with the surface on the pressure-sensitive adhesive layer side facing out (in other words, the surface on the base material side facing inward).

  FIG. 1 is a schematic cross-sectional view showing an example of an adhesive tape according to the present invention. In FIG. 1, 1 is an adhesive tape, 2 is a base material, 3 is an adhesive layer, 3a is a foaming adhesive layer, 3b is a non-foaming adhesive layer. The pressure-sensitive adhesive tape 1 shown in FIG. 1 includes a pressure-sensitive adhesive layer 2 having a structure in which a foamed pressure-sensitive adhesive layer 3a and a non-foamed pressure-sensitive adhesive layer 3b are laminated on one side of a base material 2, and a non-foamed pressure-sensitive adhesive layer 3b. It is formed in a form in contact with the material 2. That is, the pressure-sensitive adhesive tape 1 has a configuration in which a non-foamed pressure-sensitive adhesive layer 3b and a foamed pressure-sensitive adhesive layer 3a are laminated on a base material 2 in this order.

(Foamed adhesive layer)
The foamed pressure-sensitive adhesive layer is a pressure-sensitive adhesive layer containing a foamed foaming agent. Accordingly, the foamed pressure-sensitive adhesive layer contains bubbles (closed cells, open cells, etc.). In the foamed pressure-sensitive adhesive layer, the foamed foaming agent is contained in the foamed pressure-sensitive adhesive layer at a ratio of 3 to 50% by weight with respect to the total amount (solid content) of the foamed pressure-sensitive adhesive layer. Moreover, the foaming foaming agent is expanded to 2 to 30 times the volume before foaming. Such a foaming agent (unfoamed foaming agent) is not particularly limited, and a known or conventional foaming agent can be used, but a heat-foaming foaming agent that foams by heating is preferable, and thermal expansion is particularly preferable. Microspheres can be preferably used. A foaming agent can be used individually or in combination of 2 or more types. The thermally expandable microspheres as the foaming agent are not particularly limited as long as the particles have a function of causing a foaming phenomenon under a set heating condition. More specifically, as the thermally expandable microsphere, a substance that easily vaporizes and expands when heated (for example, a volatile gas such as a low-boiling hydrocarbon such as isobutane, propane, or pentane) is elastically contained in a shell. A microsphere (microcapsule) encapsulated in can be suitably used. The shell is often formed of a hot-melt material or a material that is destroyed by thermal expansion. Examples of the material forming the shell include, for example, vinylidene chloride-acrylonitrile copolymer, polyvinyl alcohol, polyvinyl butyral, polymethyl methacrylate, polyacrylonitrile, polyvinylidene chloride, polysulfone, methyl methacrylate-acrylonitrile copolymer, methyl methacrylate- Examples include acrylonitrile-methylolacrylamide copolymer. The heat-expandable microspheres can be produced by a known or conventional method (for example, a coacervation method, an interfacial polymerization method, an insight polymerization method, etc.).

  The particle diameter (average particle diameter) of the foaming agent (unfoamed foaming agent) such as thermally expandable microspheres can be appropriately selected according to the thickness of the foamed adhesive layer. The average particle diameter of the foaming agent such as thermally expandable microspheres can be selected from the range of, for example, 100 μm or less (preferably 80 μm or less, more preferably 10-50 μm, particularly 10-30 μm).

  The foaming start temperature of the heat-foaming foaming agent (particularly the thermally expandable microsphere) as the foaming agent can be appropriately selected from the range of 80 ° C to 210 ° C, for example.

  In addition, it is important that the expansion or expansion ratio of the foaming agent (particularly, thermally expandable microspheres) is 2 to 30 times (preferably 3 to 20 times). That is, as the foaming agent, it is important to use a foaming agent that can be expanded to a volume of 2 to 30 times (preferably 3 to 20 times) the volume before foaming (original volume). When the expansion ratio of the foaming agent is less than 2 times, the cushioning property of the foamed adhesive layer becomes insufficient, and the followability of the foamed adhesive layer with respect to the dust removal object decreases. On the other hand, when the expansion ratio of the foaming agent exceeds 30 times, irregularities may be formed on the surface of the foamed pressure-sensitive adhesive layer. It is necessary to deform the surface.

  Examples of thermally expandable microspheres as foaming agents include, for example, a series of trade names “Matsumoto Microsphere” manufactured by Matsumoto Yushi Seiyaku Co., Ltd. (for example, trade names “Matsumoto Microsphere F30”, “Matsumoto Microsphere”). Sphere F301D ”, etc., as well as commercial products such as“ X51DU ”,“ 053DU ”,“ 551DU ”,“ 551-20DU ”, and“ 551-80DU ”manufactured by EXPANSEL can do.

  The amount of foaming agent used is such that the foamed foaming agent is used in a proportion of 3 to 50% by weight (preferably 5 to 30% by weight) with respect to the total amount (solid content) of the foamed adhesive layer. is important. That is, the amount of the foaming agent used is 3 to 50% by weight (preferably 5 to 30% by weight) based on the total amount (solid content) of the pressure-sensitive adhesive composition containing the foaming agent for forming the foamed pressure-sensitive adhesive layer. ) Is important. When the ratio of the foaming agent is less than 3% by weight based on the total amount (solid content) of the foamed adhesive layer, irregularities may be formed on the surface of the foamed adhesive layer. When dust is removed from a flat dust removal object, it is necessary to deform the surface of the foamed adhesive layer. On the other hand, when the ratio of the foaming agent exceeds 50% by weight with respect to the total amount (solid content) of the foamed adhesive layer, the adhesive strength of the foamed adhesive layer is reduced.

  A foaming adhesive layer can be formed with the foaming agent containing adhesive composition containing the adhesive for providing adhesiveness, and a foaming agent. As a pressure-sensitive adhesive for forming a foamed pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive for foamed pressure-sensitive adhesive layer”), foaming and / or expansion of a foaming agent (such as thermally expandable microspheres) is possible. Those which are not restricted to the above are preferable. Examples of the adhesive for the foamed adhesive layer include acrylic adhesives, rubber adhesives, vinyl alkyl ether adhesives, silicone adhesives, polyester adhesives, polyamide adhesives, urethane adhesives, fluorine 1 type of known pressure sensitive adhesive, such as a pressure sensitive adhesive, a styrene-diene block copolymer based pressure sensitive adhesive, and a creep property improved pressure sensitive adhesive in which a melting point of about 200 ° C. or less is blended with a heat melting resin. Or it can use in combination of 2 or more types. Further, as the pressure-sensitive adhesive for the foamed pressure-sensitive adhesive layer, a radiation-curing pressure-sensitive adhesive (or energy ray-curable pressure-sensitive adhesive), a heat-melting one, or the like can be used. The pressure-sensitive adhesive for the foamed pressure-sensitive adhesive layer can be used alone or in combination of two or more.

  As the pressure-sensitive adhesive for the foamed pressure-sensitive adhesive layer, an acrylic pressure-sensitive adhesive or a rubber-based pressure-sensitive adhesive can be preferably used, and an acrylic pressure-sensitive adhesive is particularly preferable.

  In addition to the polymer component such as the adhesive component (base polymer), the pressure-sensitive adhesive for the foamed adhesive layer is a crosslinking agent (for example, an aluminum-based crosslinking agent or a polyisocyanate-based crosslinking agent) depending on the type of the adhesive. Agents, alkyl etherified melamine crosslinking agents, epoxy crosslinking agents, etc.), tackifiers (for example, rosin derivative resins, polyterpene resins, petroleum resins, phenol resins, etc.), plasticizers, fillers, colorants, anti-aging agents. In addition, an appropriate additive such as an ultraviolet absorber, an antioxidant, or an antistatic treatment agent may be contained.

  The thickness of the foamed adhesive layer is desirably in the range of, for example, about 10 to 1000 μm (for example, 20 to 500 μm, preferably 50 to 300 μm). The thickness of the unfoamed pressure-sensitive adhesive layer when forming the foamed pressure-sensitive adhesive layer (thickness of the unfoamed pressure-sensitive adhesive layer) is, for example, in the range of about 5 to 300 μm (preferably 10 to 50 μm). You can choose.

  The foamed pressure-sensitive adhesive layer can be formed by a known or common forming method. For example, a foaming agent-containing pressure-sensitive adhesive composition containing a pressure-sensitive adhesive and a foaming agent is applied on a non-foamed pressure-sensitive adhesive layer to form an unfoamed pressure-sensitive adhesive layer (unfoamed pressure-sensitive adhesive layer), and then heated. After forming a non-foamed pressure-sensitive adhesive layer by applying a foaming agent-containing pressure-sensitive adhesive composition containing a pressure-sensitive adhesive and a foaming agent to form a non-foamed pressure-sensitive adhesive layer. Examples include a method in which a pressure-sensitive adhesive layer is transferred onto a non-foamed pressure-sensitive adhesive layer, an unfoamed pressure-sensitive adhesive layer is formed on the non-foamed pressure-sensitive adhesive layer, and then the foaming agent is foamed by heating or the like. It is done.

  In the present invention, the foamed pressure-sensitive adhesive layer may be composed of a plurality of layers with or without other layers as long as the effects of the present invention are not impaired.

(Non-foam adhesive layer)
The non-foamed pressure-sensitive adhesive layer is a pressure-sensitive adhesive layer that does not contain a foaming agent. That is, the non-foamed pressure-sensitive adhesive layer does not contain bubbles. The non-foaming pressure-sensitive adhesive layer can be formed from a pressure-sensitive adhesive composition that does not contain a foaming agent. As the pressure-sensitive adhesive for forming the non-foamed pressure-sensitive adhesive layer (sometimes referred to as “pressure-sensitive adhesive for non-foamed pressure-sensitive adhesive layer”), the pressure-sensitive adhesive for forming the foamed pressure-sensitive adhesive layer (pressure-sensitive adhesive for foamed pressure-sensitive adhesive layer) The same pressure-sensitive adhesive as that of the agent can be used. Specifically, as the non-foaming pressure-sensitive adhesive layer pressure-sensitive adhesive layer, for example, an acrylic pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, a vinyl alkyl ether pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, a polyester pressure-sensitive adhesive, a polyamide pressure-sensitive adhesive, Known adhesives such as urethane pressure sensitive adhesives, fluorine based pressure sensitive adhesives, styrene-diene block copolymer based pressure sensitive adhesives, and those having improved melting characteristics having a melting point of about 200 ° C. or less. These pressure-sensitive adhesives can be used alone or in combination. Moreover, as a non-foaming adhesive layer adhesive, a radiation curable adhesive (or energy beam curable adhesive), a heat-melting thing, etc. can also be used. The pressure-sensitive adhesive for non-foamed pressure-sensitive adhesive layer can be used alone or in combination of two or more. As the non-foaming pressure-sensitive adhesive layer pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive or a rubber-based pressure-sensitive adhesive can be preferably used, and an acrylic pressure-sensitive adhesive is particularly preferable.

  In addition to the polymer component such as the adhesive component (base polymer), the pressure-sensitive adhesive for the non-foamed pressure-sensitive adhesive layer is a crosslinking agent (for example, an aluminum-based crosslinking agent, a polyisocyanate-based adhesive, etc.) depending on the type of the pressure-sensitive adhesive. Crosslinking agents, alkyl etherified melamine crosslinking agents, epoxy crosslinking agents, etc.), tackifiers (eg, rosin derivative resins, polyterpene resins, petroleum resins, phenol resins, etc.), plasticizers, fillers, colorants, anti-aging An appropriate additive such as an agent, an ultraviolet absorber, an antioxidant, and an antistatic treatment agent may be contained.

  The thickness of the non-foamed pressure-sensitive adhesive layer can be appropriately selected according to the thickness of the foamed pressure-sensitive adhesive layer, the expansion ratio of the foaming agent in the foamed pressure-sensitive adhesive layer, and is not particularly limited. It can select from the range of about 0.5-30 micrometers (preferably 1-10 micrometers). In addition, the thickness of a non-foaming adhesive layer is usually thinner than the thickness of a foaming adhesive layer.

  In this invention, it is preferable that the adhesive for non-foaming adhesive layers and the adhesive for foaming adhesive layers are the adhesives of the same composition. That is, the pressure-sensitive adhesive composition for forming the non-foamed pressure-sensitive adhesive layer and the foaming agent-containing pressure-sensitive adhesive composition for forming the foamed pressure-sensitive adhesive layer have the same composition except for the presence or absence of the foaming agent. It is preferable that it is an adhesive composition. Therefore, the pressure-sensitive adhesive composition for forming the non-foamed pressure-sensitive adhesive layer has the same composition as the pressure-sensitive adhesive composition obtained by removing the foaming agent from the foaming-agent-containing pressure-sensitive adhesive composition for forming the foamed pressure-sensitive adhesive layer. It is preferable. Thus, when the non-foamed pressure-sensitive adhesive layer and the foamed pressure-sensitive adhesive layer are formed using a pressure-sensitive adhesive having the same composition, the adhesion at the interface between the non-foamed pressure-sensitive adhesive layer and the foamed pressure-sensitive adhesive layer is increased. The foamed pressure-sensitive adhesive layer can be formed on the non-foamed pressure-sensitive adhesive layer with excellent adhesion. Therefore, the pressure-sensitive adhesive layer composed of the foamed pressure-sensitive adhesive layer and the non-foamed pressure-sensitive adhesive layer can be formed as a pressure-sensitive adhesive layer in which the foamed pressure-sensitive adhesive layer and the non-foamed pressure-sensitive adhesive layer are integrated with excellent adhesion.

  Depending on the expansion ratio of the foaming agent in the foaming adhesive layer, the foaming adhesive layer may be used even if the adhesive for non-foaming adhesive layer and the adhesive for foaming adhesive layer are not the same composition. Can be formed on the non-foamed pressure-sensitive adhesive layer with excellent adhesion.

(Base material)
Although it does not specifically limit as a base material (support body), What is necessary is just a base material normally used for an adhesive sheet or a tape. As the substrate, a plastic film (or sheet) can be suitably used. Examples of the plastic material in the plastic film include, for example, polyolefin resins such as polyethylene, polypropylene, and ethylene-propylene copolymer; polyester resins such as polyethylene terephthalate, vinyl chloride resins, vinyl acetate resins, and acrylic resins. Various resins (such as thermoplastic resins) such as resin, polyimide resin, fluorine resin, and cellophane are listed.

  Examples of the base material include paper such as kraft paper and Japanese paper; foam sheet made of foam made of polyurethane, polychloroprene rubber, etc .; Manila hemp, pulp, rayon, acetate fiber, polyester fiber, polyvinyl alcohol fiber, polyamide fiber Woven fabrics such as natural fibers such as polyolefin fibers, semi-synthetic fibers or fibrous materials of synthetic fibers, or woven or non-woven fabrics such as blends; rubber sheets made of natural rubber, butyl rubber, etc .; aluminum foil, copper foil A metal foil or the like can also be used.

  The base material may have any structure of a single layer structure or a laminated structure. The substrate may be any of transparent, translucent, and opaque. The base material may contain appropriate additives such as a colorant, an anti-aging agent, an ultraviolet absorber, an antioxidant, and an antistatic treatment agent. Furthermore, the surface of the substrate may be subjected to a surface treatment such as a corona treatment.

  Although the thickness of a base material can be suitably selected according to the objective, For example, it can select from the range of about 10-500 micrometers (preferably 20-100 micrometers, More preferably, 30-60 micrometers).

  When the substrate is a plastic film, the plastic film may be either an unstretched film or a stretched film (uniaxially stretched film or biaxially stretched film), but preferably a lateral uniaxially stretched film. . When a laterally uniaxially stretched film is used as a base material, for example, after removing dust using an adhesive dust removing cleaner, the cutability for cutting off a dirty layer (one round of outer periphery) is improved.

(Adhesive dust cleaner)
In the pressure-sensitive adhesive dust cleaner of the present invention, a pressure-sensitive adhesive tape wound with a structure in which a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on one side of a substrate is wound around the core material in a roll shape with the surface on the pressure-sensitive adhesive layer side outside. A round body is used. Specifically, as an adhesive dust cleaner, a non-foamed adhesive layer and a foamed adhesive layer are formed on one side of a substrate, and an adhesive tape formed in this order is formed on the core material (core). It has an adhesive tape wound body with a configuration wound in a roll shape in such a form that the agent layer is on the outside (that is, in a form in which the base material is on the inside or the core material side).

  As the core material when forming the adhesive tape wound body, a core material composed of any material (for example, a plastic core material, a metal core material, a paper core material, etc.) In order to prevent a decrease in the adhesive force of the adhesive dust removing cleaner due to adhesion of dust and dust generated from the core material, a plastic core material and a metal core material can be suitably used. The plastic material for forming the plastic core material is not particularly limited, and examples thereof include olefin resins such as low density polyethylene and high density polyethylene; carbonate resins such as polycarbonate; acrylonitrile-butadiene-styrene copolymer (ABS resin). ) And the like. The metal material for forming the metal core material can be selected as appropriate based on cost, workability, etc. For example, common metal materials such as iron, aluminum, and stainless steel can be used.

  The core material may have either a single layer structure or a laminated structure.

  The core material has a cylindrical shape, and the diameter (inner diameter and outer diameter) is not particularly limited and may be determined as appropriate.

  In addition, as described above, the pressure-sensitive adhesive dust cleaner of the present invention comprises a pressure-sensitive adhesive tape wound body that is wound around a core material in a roll shape so that the pressure-sensitive adhesive layer (that is, the foamed pressure-sensitive adhesive layer) is outside. Since it has, on the back surface of the base material of the adhesive tape in the adhesive tape roll (that is, the surface opposite to the adhesive layer or the foamed adhesive layer), a release treatment layer (back treatment layer) Is preferably formed. The release treatment layer can be formed of a release treatment agent or a low adhesive resin. As the release treatment agent, known release treatment agents such as silicone release treatment agents, alkyl release treatment agents, and fluorine release treatment agents can be appropriately selected and used. Examples of the low adhesive resin include low adhesive polyolefin resins such as high density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, and poly-4-methylpentene-1. The linear low-density polyethylene is an ethylene copolymer obtained by copolymerizing ethylene with a small amount of α-olefin (propylene, butene-1, hexene-1, 4-methyl-pentene-1, octene-1, etc.). Coalescence is mentioned.

  In addition, when the mold release process layer is not formed in the back surface of a base material, the surface (namely, surface of a foaming adhesive layer) of the adhesive layer may be protected by the peeling liner (separator). As such a release liner, a release liner in which a release treatment agent layer made of the release treatment agent is formed on the surface of a substrate, a plastic film having high releasability itself [for example, a polyethylene film (linear low density Polyethylene film, etc.), polyolefin resin film such as ethylene-α-olefin copolymer film; Teflon (registered trademark) film, etc.] release liner, plastic film material having high peelability (for example, polyethylene, ethylene, etc.) Examples thereof include a release liner obtained by laminating or coating a polyolefin-based resin such as -α-olefin copolymer, Teflon, or the like) on various base materials (for example, metal foil, heat-resistant plastic film, etc.).

  Thus, the surface of an adhesive layer (namely, foaming adhesive layer) can be protected by using a peeling process layer and a peeling liner.

  Furthermore, the non-foamed pressure-sensitive adhesive layer and the pressure-sensitive adhesive layer made of the foamed pressure-sensitive adhesive layer are formed on the substrate via another layer (for example, an antistatic layer) within the range that does not impair the function and effect of the present invention. May be.

  The pressure-sensitive adhesive dust cleaner of the present invention has excellent adhesion between the base material and the pressure-sensitive adhesive layer in the pressure-sensitive adhesive tape, and has good followability to the uneven surface of the dust-removed object. It is useful as an adhesive dust cleaner used in a hand roller system, a direct copy system, a transfer system, a pasting system, etc., as shown in FIG. 2, and is particularly useful as an adhesive dust cleaner used in a hand roller system.

  FIG. 2 is a schematic view showing an example of use of the adhesive dust cleaner of the present invention. Fig. 2 (a) shows an example of using an adhesive dust cleaner for the hand roller system, Fig. 2 (b) shows an example of use of an adhesive dust cleaner for the direct copy system, and Fig. 2 (c) shows an example of use of an adhesive dust cleaner for the transfer system. FIG. 2 (d) shows usage examples of the adhesive dust cleaner related to the pasting method. 2A to 2D, 4a, 4b, 4c1, 4c2, and 4d are adhesive dust cleaners, 5a to 5d are dust deposits, 6a is a rubber roll or metal roll, 6b is an adhesive rubber roller, and 6c is an adhesive rubber. It is a roller.

  In addition, when using an adhesion dust removal cleaner by a hand roller system, an adhesion dust removal cleaner can be utilized as an adhesion dust removal cleaner in a rotary adhesion dust removal tool. Specifically, as shown in FIG. 3, the rotary adhesive dust remover includes, for example, an adhesive dust cleaner, a tape mounting roll unit to which the adhesive dust cleaner can be mounted, and the tape mounting roll unit. It can be formed by a roll jig that is rotatably held and a handle provided at an end of the roll jig.

  FIG. 3 is a schematic view showing a rotary adhesive dust remover equipped with the adhesive dust cleaner of the present invention. In FIG. 3, 7 is a rotary adhesive dust remover, 7a is an adhesive dust cleaner, 7b is a tape mounting roll section, 7c is a roll jig, and 7d is a handle. In the rotary adhesive dust remover 7 shown in FIG. 3, the adhesive dust cleaner 7a is attached to the tape mounting roll portion 7b, the tape mounting roll portion 7b is rotatably fixed to the roll jig 7c, and A handle 7d is attached to the other end of the roll jig 7c (the end opposite to the tape mounting roll 7b).

  The tape mounting roll part is not particularly limited as long as it has a form in which an adhesive dust cleaner can be attached and has a form that can be rotatably held by a roll jig. It has a portion that can be inserted into the core material (inside the inner cavity) of the adhesive tape wound body in the dust removal cleaner, and has an inserted portion (cavity portion) into which one end of the roll jig is inserted. be able to.

  In addition, the roll jig is particularly limited as long as one end side has a form in which the tape mounting roll part is rotatably held and the other end side has a form in which a handle can be installed. However, for example, a handle mounting portion that has a cylindrical insertion portion that can be inserted into the inside of the tape mounting roll portion (inside the inner cavity) on one end side, and a handle can be mounted on the other end side. It can be set as the structure which has these. In addition, as a method of holding the tape mounting roll portion rotatably, the insertion portion of the roll jig and the tape mounting roll portion are rotatably held by a rotation holding method using a fitting method. The method etc. are mentioned.

  Moreover, it is preferable that the roll jig has a shape (a bent shape) such that the surface of the adhesive dust cleaner can be easily rolled while being in contact with the surface of the object to be removed by grasping the handle.

  The handle is not particularly limited as long as it has a form that can be attached to the end of the roll jig, but, for example, an inserted part that can be fixed by inserting the end (handle attaching part) of the roll jig. It can be set as the structure which has. In addition, if it has the said structure as a shape of a handle, it will not restrict | limit in particular.

  In the present invention, the adhesive strength of the adhesive dust cleaner (adhesive strength of the adhesive tape roll or foamed adhesive layer) is not particularly limited, but is, for example, 0.01 to 1.20 N / 25 mm, preferably 0. 0.05 to 1.0 N / 25 mm (more preferably 0.1 to 0.8 N / 25 mm). If the adhesive strength of the adhesive dust remover is less than 0.01 N / 25 mm, the dust may not be sufficiently removed. On the other hand, if it exceeds 1.20 N / 25 mm, the adhesive strength may be reduced depending on the object to be removed. It is too strong, and the adhesive tape wound body of the adhesive dust cleaner in the rotary adhesive dust remover cannot be smoothly rotated, or the dust removal object is easily deformed or broken. The adhesive strength of the adhesive dust cleaner can be determined in accordance with the adhesive strength test method specified in JIS Z0237.

  The dust removal object is not particularly limited, and may be of any shape / material. For example, even if an uneven portion is formed on the surface, the shape of the pressure-sensitive adhesive layer surface can be made to follow the shape of the uneven portion of the dust removal object, and dust can be removed with excellent dust removal performance. Specifically, examples of the dust removal target include electronic components, furniture, furniture, rugs, tatami mats, walls, and films being manufactured.

Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.
Example 1
Polymerization was carried out using butyl acrylate: 90 parts by weight, vinyl acetate: 6 parts by weight, acrylic acid: 3 parts by weight, and hydroxyethyl acrylate: 0.5 parts by weight to produce an acrylic polymer (“acrylic polymer A”). Was prepared).

  Acrylic polymer A: 100 parts by weight of an aluminum-based crosslinking agent (trade name “Aluminum Chelate AW” manufactured by Kawaken Fine Chemical Co., Ltd .; aluminum trisacetylacetonate): 2 parts by weight of an acrylic pressure-sensitive adhesive A composition is prepared, and the acrylic pressure-sensitive adhesive composition is applied to one side of a base material (polyethylene terephthalate base material, thickness: 38 μm) so that the thickness after drying is 2 μm, dried or cured, A pressure-sensitive adhesive layer (non-foamed pressure-sensitive adhesive layer; sometimes referred to as “non-foamed pressure-sensitive adhesive layer A”) was formed.

  Further, with respect to 100 parts by weight of acrylic polymer A, an aluminum-based crosslinking agent (trade name “aluminum chelate AW” manufactured by Kawaken Fine Chemical Co., Ltd .; aluminum trisacetylacetonate): 2 parts by weight and a foaming agent (trade name) “Matsumoto Microsphere F30” Matsumoto Yushi Seiyaku Co., Ltd.): Add 7 parts by weight to prepare an acrylic pressure-sensitive adhesive composition containing a foaming agent, and prepare an acrylic pressure-sensitive adhesive composition containing this foaming agent. The non-foamed pressure-sensitive adhesive layer A was coated on the non-foamed pressure-sensitive adhesive layer A so that the thickness after drying was 40 μm, and dried or cured to form an unfoamed pressure-sensitive adhesive layer. Thereafter, the non-foamed pressure-sensitive adhesive layer is foamed under the conditions of 120 ° C. × 10 seconds to form a pressure-sensitive adhesive layer (foamed pressure-sensitive adhesive layer) containing the foamed foaming agent. A ") was prepared.

(Example 2)
Styrene-isoprene-styrene block copolymer (trade name “Quintac 3433” manufactured by Nippon Zeon Co., Ltd.): Aliphatic hydrocarbon resin (trade name “Quinton N-295” manufactured by Nippon Zeon Co., Ltd.) with respect to 100 parts by weight. 25 parts by weight are added to prepare a rubber-based pressure-sensitive adhesive composition, and the rubber-based pressure-sensitive adhesive composition is dried on one side of a base material (polyethylene terephthalate base material, thickness: 38 μm). It was applied to a thickness of 2 μm and dried or cured to form a pressure-sensitive adhesive layer (non-foamed pressure-sensitive adhesive layer; sometimes referred to as “non-foamed pressure-sensitive adhesive layer B”).

  Moreover, with respect to 100 parts by weight of the acrylic polymer A prepared in the same manner as in Example 1, an aluminum-based crosslinking agent (trade name “aluminum chelate AW” manufactured by Kawaken Fine Chemical Co., Ltd .; aluminum trisacetylacetonate): 2 parts by weight and a foaming agent (trade name “Matsumoto Microsphere F30” Matsumoto Yushi Seiyaku Co., Ltd.): 7 parts by weight are added to prepare an acrylic pressure-sensitive adhesive composition containing the foaming agent. A non-foamed pressure-sensitive adhesive layer was formed on the non-foamed pressure-sensitive adhesive layer B by applying an acrylic pressure-sensitive adhesive composition containing a so as to have a thickness after drying of 40 μm, followed by drying or curing. Thereafter, the non-foamed pressure-sensitive adhesive layer is foamed under the conditions of 120 ° C. × 10 seconds to form a pressure-sensitive adhesive layer (foamed pressure-sensitive adhesive layer) containing the foamed foaming agent. B ") was prepared.

(Comparative Example 1)
Acrylic polymer A prepared in the same manner as in Example 1: 100 parts by weight of aluminum-based crosslinking agent (trade name “aluminum chelate AW” manufactured by Kawaken Fine Chemical Co., Ltd .; aluminum trisacetylacetonate): 2 weights Part and a foaming agent (trade name “Matsumoto Microsphere F30” Matsumoto Yushi Seiyaku Co., Ltd.): 7 parts by weight is added to prepare an acrylic pressure-sensitive adhesive composition containing the foaming agent, and this foaming agent is contained. The acrylic pressure-sensitive adhesive composition to be applied is applied to one side of a base material (polyethylene terephthalate base material, thickness: 38 μm) so that the thickness after drying is 40 μm, dried or cured, and an unfoamed pressure-sensitive adhesive Layers were formed. Thereafter, the non-foamed pressure-sensitive adhesive layer is foamed under the conditions of 120 ° C. × 10 seconds to form a pressure-sensitive adhesive layer (foamed pressure-sensitive adhesive layer) containing the foamed foaming agent. C ").

(Comparative Example 2)
Acrylic polymer A prepared in the same manner as in Example 1: 100 parts by weight of aluminum-based crosslinking agent (trade name “aluminum chelate AW” manufactured by Kawaken Fine Chemical Co., Ltd .; aluminum trisacetylacetonate): 2 weights Part is added to prepare an acrylic pressure-sensitive adhesive composition, and this acrylic pressure-sensitive adhesive composition has a thickness of 40 μm after drying on one side of a base material (polyethylene terephthalate base material, thickness: 38 μm). The adhesive layer (non-foamed adhesive layer) was formed, and an adhesive tape (“adhesive tape D”) was produced.

(Evaluation methods)
About the adhesive tapes (adhesive tapes A to D) obtained in Examples 1 and 2 and Comparative Examples 1 and 2, the following measurement method or evaluation method (evaluation method for anchoring property, evaluation method for uneven surface followability, foaming agent) The expansion ratio of the foaming agent in the foamed pressure-sensitive adhesive layer was measured or evaluated. The evaluation results are shown in Table 1.

(Throwing property evaluation method)
By rubbing the surface of each pressure-sensitive adhesive layer in the pressure-sensitive adhesive tapes A to D by hand to check whether the pressure-sensitive adhesive layer is peeled off, the case where the pressure-sensitive adhesive layer has not been peeled off from the base material is indicated as “◯”, In this case, the adhesive property of the adhesive tape or the pressure-sensitive adhesive layer was evaluated as “△” when the material was not easily peeled off, and “X” when the pressure-sensitive adhesive layer was easily peeled off from the substrate.

  Moreover, when the adhesive layer peeled off, the peeled interface (fracture interface) was confirmed. In Table 1, “interface in the pressure-sensitive adhesive layer” means that peeling occurred at the interface between the non-foamed pressure-sensitive adhesive layer and the foamed pressure-sensitive adhesive layer, and “substrate / foamed pressure-sensitive adhesive layer interface”. Means that peeling occurred at the interface between the substrate and the foamed adhesive layer.

(Evaluation method of uneven surface followability)
“○” indicates that a toner for copying having an average particle diameter of about 10 μm was spread on the sandpaper # 100, and the toner was removed using the adhesive tapes A to D, and the toner was sufficiently removed. In the case where the toner could not be sufficiently removed, “x” was assigned to evaluate the uneven surface followability of the adhesive tape.

(Method for measuring expansion ratio of foaming agent)
In the pressure-sensitive adhesive tapes A to D, the unfoamed foaming agent particles before foaming the foaming agent and the foamed pressure-sensitive adhesive layer after foaming the foaming agent were measured using an optical microscope. The diameter and the particle diameter of the foamed foaming agent were measured, the volume of the foaming agent particles before and after foaming was determined, and the expansion ratio of the foaming agent was determined. In addition, in the adhesive tape D, since the foaming adhesive layer was not formed, it could not be measured.

  From Table 1, in the adhesive tape which concerns on Examples 1-2, the adhesive layer was adhere | attached firmly to the base material, and even if it rubbed by hand, the adhesive layer was not peeled easily. Moreover, even if it peeled off, it peeled in the interface of a foaming adhesive layer and a non-foaming adhesive layer, and it was confirmed that the adhesive layer is formed on the base material with the outstanding adhesiveness.

  In addition, the pressure-sensitive adhesive layer surface of the pressure-sensitive adhesive tape is a foamed pressure-sensitive adhesive layer obtained by foaming the foaming agent used at a predetermined usage amount with a predetermined expansion ratio. ) Is good.

FIG. 1 is a schematic cross-sectional view showing an example of an adhesive tape according to the present invention. It is the schematic which shows the usage example of the adhesion dust removal cleaner of this invention. It is the schematic which shows the rotary adhesive dust removal tool equipped with the adhesion dust removal cleaner of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adhesive tape 2 Base material 3 Adhesive layer 3a Foaming adhesive layer 3b Non-foaming adhesive layer 4a Adhesive dust cleaner 4b Adhesive dust cleaner
4c1 ～ 4c2 Adhesive dust cleaner 4d Adhesive dust cleaner
5a to 5d Dust deposit 6a Rubber roll and metal roll 6b Adhesive rubber roller 6c Adhesive rubber roller 7 Rotary adhesive dust remover 7a Adhesive dust cleaner 7b Tape mounting roll 7c Roll jig 7d Handle

Claims (4)

A pressure-sensitive adhesive dust cleaner comprising a pressure-sensitive adhesive tape wound body having a structure in which a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer formed on one side of a base material is wound in a roll shape with the surface on the pressure-sensitive adhesive layer side facing outward. A pressure-sensitive adhesive layer in the pressure-sensitive adhesive tape is located on the front surface side and includes a foamed pressure-sensitive adhesive layer, and a non-foamable pressure-sensitive adhesive located on the substrate side and does not contain a foaming agent. The foamed pressure-sensitive adhesive layer in the pressure-sensitive adhesive layer contains 3 to 50% by weight of the foamed foaming agent relative to the total amount of the foamed pressure-sensitive adhesive layer. And the adhesive dust cleaner characterized by having the structure expanded to the volume of 2-30 times with respect to the volume before foaming. After the pressure-sensitive adhesive tape forms a non-foamed pressure-sensitive adhesive layer on the substrate, a pressure-sensitive adhesive composition containing a non-foamed foaming agent is applied onto the non-foamed pressure-sensitive adhesive layer, and the foamed pressure-sensitive adhesive layer is foamed. The adhesive dust cleaner according to claim 1, which is produced by forming The ratio of the thickness of a foaming adhesive layer and the thickness of a non-foaming adhesive layer is the thickness of a foaming adhesive layer / the thickness of a non-foaming adhesive layer = 30/1-2/1. Adhesive dust removal cleaner. The pressure-sensitive adhesive dust cleaner according to any one of claims 1 to 3, wherein the non-foamed pressure-sensitive adhesive layer has a thickness of 0.5 to 5 µm.

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