JP2006291120A - Pressure-sensitive adhesive tape or sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive tape or sheet that can suppress or prevent the deterioration of an adherend due to a metal component of the adherend in the case where a substrate composed of an olefin resin is used as a substrate of the pressure-sensitive adhesive tape or sheet. <P>SOLUTION: The pressure-sensitive adhesive tape or sheet has a substrate composed of an olefin resin composition comprising an olefin resin and an adhesive layer formed on at least one surface of the substrate wherein a hydrotalcite compound is included in the adhesive layer formed on at least one surface of the substrate. As a hydrotalcite compound is suitably used a hydrotalcite. The proportion of the hydrotalcite compound is preferably 0.01 wt.% or more based on the total amount of the resin components in the adhesive layer. The pressure-sensitive adhesive tape or sheet can suitably be used as a pressure-sensitive adhesive tape or sheet for wires in fixing or binding a single wire or a plurality of wires. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pressure-sensitive adhesive tape or sheet in which a support made of an olefin resin is used. More specifically, even when a support made of an olefin resin is used, the deterioration due to the metal component of the adherend is suppressed. Or it is related with the adhesive tape or sheet | seat which can be prevented.

  Conventionally, in various electric wires such as electric equipment wires and automobile wires (automobile wire harnesses) and wiring such as power line cables and communication cables, vinyl chloride resins including vinyl chloride resins are used. Vinyl chloride wiring having a coating layer of the composition is widely used, and when the bundle of vinyl chloride wiring is bundled, it is constituted by a vinyl chloride resin composition containing a vinyl chloride resin. Vinyl chloride pressure sensitive adhesive tapes or sheets in which a support is used have been used.

  In recent years, due to environmental problems and the like, olefin-based wirings having a coating layer made of an olefin-based resin composition containing an olefin-based resin have been developed and are beginning to be used in part. For this reason, sometimes olefin-based wiring and vinyl chloride-based wiring are mixed and used. As described above, when a durability test is performed at a high temperature on a bundle of wires in which the olefin-based wires and the vinyl chloride-based wires are bundled, the coating layer of the olefin-based wires (olefin-based resin composition) There is a problem that the covering layer of the object) deteriorates faster than expected. Moreover, in particular, the problem of this early deterioration is that the support composed of an olefin-based resin composition containing an olefin-based resin is used as an adhesive tape or sheet used when bundling wiring bundles. It has been found that this happens violently when an adhesive tape or sheet is used. (See Patent Document 1)

JP 2003-157737 A

  Thus, although the mechanism of the phenomenon in which the early deterioration of the olefin-based wiring occurs is not proved, the following phenomenon occurs, and it is considered that the early deterioration has occurred.

  Under high temperature atmosphere, polyvinyl chloride resin such as polyvinyl chloride undergoes dehydrochlorination, and at the initial stage of dehydrochlorination, the dehydrochlorination component (dehydrochlorination component) is contained in the vinyl chloride resin. Although supplemented by a stabilizer, the ability to supplement the dehydrochlorination component by this stabilizer is proportional to the amount of stabilizer added and is finite. Since the dehydrochlorination component that exceeds the capture capability is no longer supplemented by the stabilizer, it is assumed that the copper component that is the conductor of the wiring is corroded and copper ions are generated at this time. This copper ion acts as an accelerator for olefin resin (particularly propylene resin such as polypropylene). When such a reaction occurs by a mechanism different from normal thermal degradation, olefin wiring is used as a bundle of wiring mixed with vinyl chloride wiring. It is thought that the coating layer of this has deteriorated faster than expected.

  In particular, the reason why the coating layer of olefin-based wiring deteriorates earlier in a bundle of wiring bundled with an olefin-based adhesive tape or sheet is that the gas permeability of the olefin-based adhesive tape or sheet is chlorinated. Compared to the gas permeability of vinyl adhesive tape or sheet, the generated gas tends to accumulate and the gas concentration is kept high in the wiring bundle bundled using olefin adhesive tape or sheet. This is thought to lead to early deterioration.

Therefore, the objective of this invention is providing the adhesive tape or sheet | seat which can suppress or prevent the deterioration resulting from the metal component of a to-be-adhered body, even if the support body by an olefin resin is used.
Another object of the present invention is to provide an adhesive tape or sheet having excellent adhesiveness.

  As a result of intensive studies to achieve the above object, the present inventors have found that in the pressure-sensitive adhesive tape or sheet in which the support made of olefin resin is used, in the pressure-sensitive adhesive layer formed on at least one surface of the support, It has been found that when a hydrotalcite-based compound is contained, deterioration due to the metal component of the adherend can be effectively suppressed or prevented. The present invention has been completed based on these findings.

  That is, the present invention is a pressure-sensitive adhesive tape or sheet having a support composed of an olefin-based resin composition containing an olefin-based resin, and a pressure-sensitive adhesive layer formed on at least one surface of the support, A pressure-sensitive adhesive tape or sheet comprising a hydrotalcite-based compound in a pressure-sensitive adhesive layer formed on at least one surface of a support.

  As the hydrotalcite compound, hydrotalcite is suitable. The ratio of the hydrotalcite compound is preferably 0.01% by weight or more with respect to the total amount of the resin component in the pressure-sensitive adhesive layer.

  The pressure-sensitive adhesive tape or sheet of the present invention can be suitably used as a wiring pressure-sensitive adhesive tape or sheet for fixing or binding a single or a plurality of wirings. The wiring includes an olefin wiring having a coating layer made of an olefin resin composition containing an olefin resin and a vinyl chloride wiring having a coating layer made of a vinyl chloride resin composition containing a vinyl chloride resin. It may be a bundle of wirings in a bundled state. The olefin resin composition according to the olefin wiring is preferably a propylene resin composition containing a propylene resin.

  According to the pressure-sensitive adhesive tape or sheet of the present invention, deterioration due to the metal component of the adherend can be suppressed or prevented even when a support made of an olefin resin is used. Moreover, it can have further excellent adhesiveness. Therefore, the pressure-sensitive adhesive tape or sheet of the present invention is useful as a wiring pressure-sensitive adhesive tape or sheet for fixing or binding a single or a plurality of wirings including at least an olefin-based wiring.

  The pressure-sensitive adhesive tape or sheet of the present invention has a support composed of an olefin-based resin composition containing an olefin-based resin, and a pressure-sensitive adhesive layer formed on at least one surface of the support. Or it is a sheet | seat (olefin type adhesive tape or sheet | seat), and the hydrotalcite type compound is contained in the adhesive layer formed in the at least one surface of the support body. As described above, since the olefin-based adhesive tape or sheet contains a hydrotalcite-based compound in the adhesive layer, not the support, a factor that generates metal ions (particularly copper ions) in the adherend. Even when a gas component (particularly hydrochloric acid gas component) is generated, the gas component can be supplemented by a hydrotalcite compound in the pressure-sensitive adhesive layer or the adherend, and metal ions (particularly copper Generation of ions) can be suppressed or prevented. Therefore, the olefin pressure-sensitive adhesive tape or sheet effectively suppresses or prevents deterioration due to the metal component (copper component, etc.) of the adherend even if the support is a support made of an olefin resin composition. Can do.

[Hydrotalcite compounds]
The hydrotalcite compound contained in the pressure-sensitive adhesive layer in the olefin-based pressure-sensitive adhesive tape or sheet is not particularly limited as long as it is a compound having a hydrotalcite structure. Specifically, as the hydrotalcite compound, for example, a hydrotalcite compound represented by the following formula (1) can be used.
X ²⁺ _(ba) Y ³⁺ _a (OH) _2b Z ^n- _{(a / n)} · mH ₂ O (1)
[In the formula (1), X ²⁺ represents a divalent metal element, Y ³⁺ represents a trivalent metal element, and ^{Zn −} represents an n-valent anion. a is a positive number, and b is a positive number of 2a or more. M is 0 or a positive number. ]

In the formula (1), X ²⁺ is a divalent metal element, and examples thereof include a magnesium element (Mg), a nickel element (Ni), a calcium element (Ca), and a zinc element (Zn). As X ²⁺ , Mg and Ni are preferable, and Mg is particularly preferable.

Y ³⁺ is a trivalent metal element, and examples thereof include an aluminum element (Al), an iron element (Fe), a chromium element (Cr), and a manganese element (Mn). As Y ³⁺ , Al, Fe, and Cr are preferable, and Al is particularly preferable.

Furthermore, Z ⁿ⁻ is an n-valent anion, such as carbonate ion (CO ₃ ²⁻ ), sulfate ion (SO ₄ ²⁻ ), hydroxide ion (OH ⁻ ), chlorine ion (Cl ⁻ ), Bromine ion (Br ⁻ ), iodine ion (I ⁻ ), nitrate ion (NO ₃ ⁻ ), metasilicate ion (SiO ₃ ²⁻ ), hydrogen borate ion (HBO ₃ ²⁻ ), hydrogen phosphate ion (HPO ₄ ^{2) -} ), Phosphate ion (PO ₄ ³⁻ ), perchlorate ion (ClO ₄ ⁻ ), hexacyanoiron (III) ion [Fe (CN) ₆ ³⁻ ], hexacyanoiron (II) ion [Fe (CN) ₆ ^4-], acetate ion (CH ₃ COO ^-), oxalate ^(- OOC-COO -), terephthalic acid ion _{^{(- OOC-C 6 H 4}} -COO -), 4- hydroxybenzoic acid ion (HO- C ₆ H ₄ —COO ⁻ ), 1-naphthalenesulfonic acid ion (C ₁ Such as ₀ H ₇ -SO ₃ ^2-) _1~4 monovalent anions and the like. As ^{Zn −} , CO ₃ ²⁻ and SO ₄ ²⁻ are preferable, and CO ₃ ²⁻ is particularly preferable.

  If a is a positive number (a number greater than 0), it is not particularly limited, and b is not particularly limited if it is a positive number of 2a or more.

  m is the number of water of crystallization and is not particularly limited as long as it is 0 or a positive number, but is preferably a positive number. When m is 0, the hydrotalcite compound is a hydrotalcite compound in a form in which crystal water is dehydrated.

As the hydrotalcite-based compound, hydrotalcite in which X ²⁺ in the formula (1) is Mg and Y ³⁺ is Al can be preferably used. Examples of such hydrotalcite include Mg ₆ Al ₂ (OH) ₁₆ CO ₃ .mH ₂ O (m is 0 or a positive number). As the hydrotalcite, for example, a commercial product such as a trade name “Alkamaisai” (manufactured by Kyowa Chemical Industry Co., Ltd.) can be used.

Examples of other hydrotalcite-based compounds include, for example, Pyroalite in which X ²⁺ in the formula (1) is Mg and Y ³⁺ is Fe, and X ²⁺ in the formula (1) is Mg. Desuterite with Y ³⁺ being Cr, X ²⁺ in the formula (1) being Mg and Y ³⁺ being Mn, X in the formula (1) Examples include Tacobite in which ²⁺ is Ni and Y ³⁺ is Al, and Reevesite in which X ²⁺ in the formula (1) is Ni and Y ³⁺ is Fe.

  The usage amount of the hydrotalcite-based compound can be selected, for example, from the range of 0.01 wt% or more (for example, 0.01 to 100 wt%) with respect to the total amount of the resin components in the pressure-sensitive adhesive layer. In the present invention, the proportion of the hydrotalcite compound is preferably 0.05 to 50% by weight, particularly 1 to 20% by weight (particularly 5 to 10%) based on the total amount of the resin component in the pressure-sensitive adhesive layer. % By weight) is preferred.

[Adhesive layer]
The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (the pressure-sensitive adhesive layer containing hydrotalcite) in the olefin-based pressure-sensitive adhesive tape or sheet is not particularly limited, and examples thereof include acrylic pressure-sensitive adhesives and rubber-based pressure-sensitive adhesives (natural rubber). Adhesives, synthetic rubber adhesives, etc.), silicone adhesives, polyester adhesives, urethane adhesives, polyamide adhesives, epoxy adhesives, vinyl alkyl ether adhesives, fluorine adhesives, etc. A known pressure-sensitive adhesive can be used. Further, the adhesive may be a hot melt adhesive. An adhesive can be used individually or in combination of 2 or more types. The pressure-sensitive adhesive may be any type of pressure-sensitive adhesive such as an emulsion-based pressure-sensitive adhesive, a solvent-based pressure-sensitive adhesive, an oligomer-based pressure-sensitive adhesive, and a solid pressure-sensitive adhesive.

  In addition to the polymer component such as an adhesive component (base polymer), the adhesive is a tackifier resin, a crosslinking agent, an ultraviolet absorber, an anti-aging agent, a flame retardant, and a filler depending on the type of the adhesive. In addition, an appropriate additive such as a plasticizer (softener), an antioxidant, a colorant, an antistatic agent, a thickener, a foaming agent, and a surfactant may be included. Examples of the tackifier resin include rosin derivatives [eg, rosin, polymerized rosin, hydrogenated rosin and derivatives thereof (such as rosin ester resins, hydrogenated rosin ester resins)], terpene resins (eg, terpene resins). , Aromatic modified terpene resins, hydrogenated terpene resins, terpene-phenol resins, etc.), phenol resins (eg, phenol-formaldehyde resins, alkylphenol-formaldehyde resins, etc.), petroleum hydrocarbon resins [eg, aliphatic petroleum resins , Aromatic petroleum resins, alicyclic petroleum resins hydrogenated with aromatic petroleum resins (alicyclic saturated hydrocarbon resins), etc.], styrene resins, chroman resins (for example, coumarone indene resins, etc.) ) And other known tackifying resins. In addition, other additives (crosslinking agent, ultraviolet absorber, anti-aging agent, flame retardant, etc.) can be appropriately selected from known ones.

  As the pressure-sensitive adhesive, acrylic pressure-sensitive adhesives and rubber-based pressure-sensitive adhesives can be suitably used from the viewpoints of durability and workability of the product.

The acrylic pressure-sensitive adhesive contains an acrylic polymer (homopolymer or copolymer) as a base polymer. Such an acrylic polymer contains one or two or more (meth) acrylic acid esters as the main component of the monomer, and if necessary, one or two or more copolymerizable monomers. An acrylic polymer containing a monomer as a copolymerization component is included. Examples of the (meth) acrylic acid ester as the main monomer component include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, (meth) Butyl acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, Octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate (Meth) acrylic such as undecyl (meth) acrylate and dodecyl (meth) acrylate Acid C _1-20 alkyl esters [preferably (meth) acrylic acid C _1-14 alkyl esters] and the like. As the (meth) acrylic acid alkyl ester, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, octyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate are particularly preferable. It is. The (meth) acrylic acid alkyl ester can be appropriately selected according to the intended tackiness and the like.

  Examples of the copolymerizable monomer as a copolymerization component include carboxyl group-containing monomers such as (meth) acrylic acid, crotonic acid, itaconic acid, maleic acid, maleic anhydride, fumaric acid and the like, or anhydrides thereof. Hydroxyl group-containing monomers such as 2-hydroxyethyl (meth) acrylate; Epoxy group-containing monomers such as glycidyl (meth) acrylate; Vinyl esters such as vinyl acetate; Cyano groups such as (meth) acrylonitrile Containing monomer; Amide group-containing monomer such as (meth) acrylamide, N, N-dimethyl (meth) acrylamide; Amino group-containing monomer such as N, N-dimethylaminoethyl (meth) acrylic acid alkyl ester Copolymerizable monomers (functional group-containing copolymerizable monomers) having various functional groups (particularly polar groups) such as styrene, etc. Mer, ethylene, propylene, and the like α- olefin monomers such as butadiene.

  The rubber-based pressure-sensitive adhesive contains a rubber component such as natural rubber or synthetic rubber as a base polymer. In such a rubber component, as synthetic rubber, for example, polyisoprene rubber, styrene / butadiene rubber, styrene / isoprene / styrene block copolymer rubber, styrene / butadiene / styrene block copolymer rubber, recycled rubber, butyl rubber, And polyisobutylene.

  The pressure-sensitive adhesive layer is formed by a known or conventional forming method [for example, a method of applying a pressure-sensitive adhesive on a support (application method), a pressure-sensitive adhesive is applied on a release film such as a release liner, and the pressure-sensitive adhesive layer is formed. Then, the adhesive layer can be formed using a method (transfer method) or the like in which the pressure-sensitive adhesive layer is transferred onto a support. In forming the pressure-sensitive adhesive layer, a known or conventional method (such as a casting method, a roll coater method, a reverse coater method, a doctor blade method) can be appropriately used.

  The pressure-sensitive adhesive layer may have any form of a single layer or a laminate. It does not restrict | limit especially as thickness of an adhesive layer, For example, it can select from the range of about 1-100 micrometers (preferably 10-50 micrometers).

[Support]
The support is composed of an olefin resin composition containing an olefin resin. The olefin-based resin is not particularly limited as long as it contains at least an olefin as a monomer component, and examples thereof include polypropylene, a copolymer of propylene and another α-olefin (propylene-based copolymer), and the like. Propylene resin; polyethylene (for example, low density polyethylene, linear low density polyethylene, ultra low density polyethylene, medium density polyethylene, high density polyethylene, etc.), copolymers of ethylene and other α-olefins (ethylene copolymer) In addition to (polymer), polybutene, polybutylene, polybutadiene and the like can be mentioned. Olefin resins can be used alone or in combination of two or more.

  Examples of olefin resins include α-olefins such as ethylene and propylene, vinyl ester compounds and / or α, β-unsaturated carboxylic acids or derivatives thereof (anhydrides, esters, chlorides, etc.). An ethylene copolymer having a carbonyl group or a metal salt thereof (ionomer) obtained by use can also be used. Examples of the vinyl ester compounds include esters of vinyl alcohol such as vinyl acetate and lower carboxylic acids (vinyl esters of lower carboxylic acids). Examples of the α, β-unsaturated carboxylic acid include (meth) acrylic acid, maleic acid, fumaric acid, and itaconic acid. Examples of α, β-unsaturated carboxylic acid derivatives include α, β-unsaturated carboxylic acid anhydrides such as maleic anhydride and itaconic anhydride. Examples of the α, β-unsaturated carboxylic acid ester include (meth) acrylic acid ester [for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate. , N-butyl (meth) acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, Heptyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, Alkyl (meth) acrylates such as isodecyl (meth) acrylate and dodecyl (meth) acrylate Ester, etc.], maleate ester, fumarate ester and the like. As the vinyl ester compound and / or the α, β-unsaturated carboxylic acid or derivative thereof, vinyl acetate, (meth) acrylic acid, or (meth) acrylic ester can be preferably used. The vinyl ester compound and / or the α, β-unsaturated carboxylic acid or derivative thereof can be used alone or in combination of two or more.

  Furthermore, as the olefin resin, for example, a polymer alloy containing an ethylene component and a propylene component can be used. As a polymer alloy containing an ethylene component and a propylene component, for example, a mixture (physical mixture) of polypropylene (homopolypropylene, random polypropylene) and polyethylene (including a copolymer of ethylene and a small amount of other α-olefin). ), Propylene / ethylene copolymers, terpolymers of propylene, ethylene and other α-olefins other than these (the other α-olefins include 1-butene, 1-pentene, 1-hexene, 4 -Methyl-1-pentene, 1-heptene, 1-octene and the like are preferable, and 1-butene is preferable. The “homopolypropylene” means a polymer (a propylene homopolymer) in which the monomer component is substantially composed only of propylene (consisting of 100%), and “random polypropylene” It means a polypropylene random copolymer in which about several percent of the ethylene component is randomly copolymerized with propylene.

  In the present invention, the olefin resin is preferably a propylene resin (particularly polypropylene) from the viewpoints of heat resistance, breaking strength, and the like.

  The support may contain an inorganic material as necessary. Examples of inorganic substances include, but are not limited to, clay minerals such as clay; metal hydroxides such as aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, calcium hydroxide, and barium hydroxide; basic magnesium carbonate, magnesium carbonate -Metal carbonates such as calcium, calcium carbonate, barium carbonate and dolomite; metal hydrates such as hydrotalcite and borax (hydrates of metal compounds); barium metaborate, magnesium oxide, red phosphorus and the like. Such an inorganic substance can also be used as a flame retardant. An inorganic substance can be used individually or in combination of 2 or more types.

  In addition, the support is optionally provided with an ultraviolet absorber (for example, a salicylic acid derivative, a benzophenone ultraviolet absorber, a benzotriazole ultraviolet absorber, a hindered amine ultraviolet absorber, etc.), an antioxidant, an antioxidant ( For example, amine-based antioxidants, quinoline-based antioxidants, hydroquinone-based antioxidants, phenol-based antioxidants, phosphorus-based antioxidants, phosphite-based antioxidants), plasticizers, fillers, coloring Various additives such as an agent, a lubricant, a nucleating agent, and a heavy metal deactivator may be blended.

  In addition, as a support body, it is preferable that a halogen atom is not included substantially. Here, “substantially does not contain a halogen atom” means that a substance containing a halogen atom in the molecule is not used as a constituent material of the support (a component in the olefin resin composition). is doing. Therefore, when the composition of the support is analyzed by instrumental analysis means, halogen atoms detected at a trace level (for example, halogen atoms by a halogen atom-containing substance used as a catalyst during the synthesis of a compound (a constituent material of the support)) However, as a result of mixing in the constituent material of the support, the inclusion of a trace amount of halogen atoms detected from the support, etc. is permitted.

  In the present invention, the method for producing the support (for example, the method for forming a polyolefin resin film) is not particularly limited. For example, a polyolefin resin and various additives as necessary are dry blended, and the mixture is kneaded using a Banbury mixer, roll, extruder, etc. (in this case, it can be heated as necessary) ), The support is obtained by molding the kneaded material into a film or sheet by a known or conventional molding method (for example, compression molding method, calendar molding method, injection molding method, extrusion molding method, etc.). Can do. In the production method of the support, an inflation extrusion method, a T-die extrusion method, and a calendar rolling method can be suitably employed.

  The support usually has a film-like or sheet-like form. The thickness of the support is not particularly limited and is generally about 0.01 to 1 mm (preferably 0.05 to 5 mm), although it varies depending on the use of the olefin-based adhesive tape or sheet.

  In addition, the support body may have a single layer form or may have a multiple layer form. The support may be subjected to surface treatment such as corona discharge treatment, chromic acid treatment, ozone treatment, flame treatment, high piezoelectric impact treatment, ionizing radiation treatment, and coating treatment with a primer, A back surface treatment with a back surface treatment agent (release treatment agent), an antistatic treatment, or the like may be performed.

[Olefin-based adhesive tape or sheet]
As described above, the olefin pressure-sensitive adhesive tape or sheet of the present invention comprises a support composed of an olefin resin composition containing an olefin resin, and a pressure-sensitive adhesive layer formed on at least one surface of the support. have. The olefin-based adhesive tape or sheet may have a form in which an adhesive layer is formed only on one side of the support, or may have a form in which an adhesive layer is formed on both sides of the support. . In addition, when the olefin adhesive tape or sheet has a form in which an adhesive layer is formed only on one side of the support, the olefin adhesive tape or sheet is, for example, one of the support and the support. When the pressure-sensitive adhesive layer is formed on the other surface of the support and the back treatment layer is formed on the other surface of the support, the pressure-sensitive adhesive layer is superimposed on the back surface of the sheet (the surface of the back treatment layer). By winding in a roll, it can be produced as an olefin-based adhesive tape or sheet in a state or form wound in a roll. At this time, the pressure-sensitive adhesive layer is protected by the back treatment layer on the back side of the sheet.

  Of course, when the olefin-based pressure-sensitive adhesive tape or sheet has the form of a double-sided pressure-sensitive adhesive tape or when the back surface of the support is not a release-treated surface, the pressure-sensitive adhesive layer is separated from the release liner (separator). The olefin-based pressure-sensitive adhesive tape or sheet in a state or form wound in a roll shape can be produced by being wound in a roll shape in a state protected by the above.

  The olefin-based pressure-sensitive adhesive tape or sheet may have other layers (for example, an intermediate layer, an undercoat layer, etc.) as long as the effects of the present invention are not impaired.

  The olefin pressure-sensitive adhesive tape or sheet of the present invention is a gas that causes the hydrotalcite-based compound contained in the pressure-sensitive adhesive layer to generate metal ions such as copper ions by being attached to an adherend. Since the function of supplementing components (particularly, hydrochloric acid gas component) is exhibited, it is possible to effectively suppress or prevent the adherend from being deteriorated by metal ions (such as copper ions). Therefore, the olefin-based adhesive tape or sheet is preferably used as an adhesive tape or sheet for adhering to an adherend having a member capable of generating metal ions such as copper ions. it can. Such an adherend is not particularly limited, and has, for example, a conductor (electrical conductor) made of a metal compound such as a copper compound and a coating layer covering the conductor. Wiring etc. are mentioned. Therefore, the olefin-based adhesive tape or sheet of the present invention can be suitably used as an adhesive tape or sheet for wiring for fixing or binding a single or a plurality of wirings. Particularly, a plurality of wirings are bundled. It can be suitably used as an adhesive tape or sheet for wiring when binding the wiring bundle in a state of becoming.

  Examples of such wiring include olefin wiring having a coating layer made of an olefin resin composition containing an olefin resin, and vinyl chloride having a coating layer made of a vinyl chloride resin composition containing a vinyl chloride resin. System wiring and the like.

  The wiring bundle may be either a wiring bundle using a plurality of the same kind of wirings or a wiring bundle using a plurality of two or more kinds of wirings (different kinds of wirings). Therefore, the wiring bundle may be, for example, a wiring bundle in a state where olefin wiring and vinyl chloride wiring are bundled. In particular, when vinyl chloride wiring is used, a dehydrochlorination component (hydrochloric acid gas component) that corrodes the copper wire, which is a conductor in the wiring, is generated in a high-temperature atmosphere. The copper ions produced may deteriorate the coating layer of the olefinic wirings with the olefinic resin, but when the olefinic adhesive tape or sheet of the present invention is used, the hydrotalcite compound in the adhesive layer is a hydrochloric acid gas component. Since the corrosion of copper wires can be suppressed or prevented, the olefin wiring can be used even when the olefin wiring and the vinyl chloride wiring are bundled. It is possible to effectively suppress or prevent the degradation of the kind.

  In the olefin-based wirings, the olefin-based resin of the olefin-based resin composition constituting the coating layer is not particularly limited as long as the resin contains at least olefin as a monomer component. For example, the olefin-based adhesive The same olefin resin as the olefin resin related to the support in the tape or sheet can be used. Specifically, as the olefin resin related to the olefin wiring, for example, polypropylene, a propylene resin such as a copolymer of propylene and another α-olefin (propylene copolymer); polyethylene (for example, Low-density polyethylene, linear low-density polyethylene, ultra-low-density polyethylene, medium-density polyethylene, high-density polyethylene, etc.) and copolymers of ethylene and other α-olefins (ethylene-based copolymers). . Olefin resins can be used alone or in combination of two or more.

  As such an olefin resin, a propylene resin (particularly, polypropylene) is preferable from the viewpoint of heat resistance, breaking strength, and the like. Therefore, a propylene resin composition containing a propylene resin (particularly, polypropylene) is suitable as the olefin resin composition according to the olefin wiring.

  In addition, as said wirings, any wirings, such as various electric wires and cables, may be sufficient, Especially, the electric wire for electric appliances, and the electric wire for motor vehicles (especially electric wire for motor vehicles) are suitable. Thus, the olefin pressure-sensitive adhesive tape or sheet of the present invention can be suitably used as a wiring tape pressure-sensitive adhesive tape or sheet used in places where electrical insulation is required.

  Moreover, since the support body is comprised with the olefin resin and the support body which does not contain a halogen atom substantially is used for the olefin system adhesive tape or sheet | seat of this invention, an olefin system adhesive tape or sheet | seat is used. Generation of toxic gas can be prevented during incineration after using. Furthermore, the heat resistance of an olefin type adhesive tape or sheet | seat can be improved by using the support body to which the flame retardance function was added as a support body. Therefore, the olefin-based pressure-sensitive adhesive tape or sheet of the present invention is excellent in heat resistance, and can be an olefin-based pressure-sensitive adhesive tape or sheet that does not generate toxic gas during incineration.

  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
A hydrotalcite-containing acrylic pressure-sensitive adhesive is prepared by adding 0.05% by weight of hydrotalcite to the total amount of resin components in the acrylic pressure-sensitive adhesive. An adhesive is applied on a support (thickness 80 μm) made of a propylene-based resin composition containing a propylene-based resin to form an adhesive layer (thickness 20 μm), and an olefin-based adhesive tape or A sheet was produced.

(Examples 2 to 7)
An olefin pressure-sensitive adhesive tape or sheet was produced in the same manner as in Example 1 except that the amount of hydrotalcite added was the ratio shown in Table 1. In Table 1, the amount of hydrotalcite added (% by weight) is a ratio relative to the total amount of resin components in the acrylic pressure-sensitive adhesive.

(Comparative Example 1)
An olefin-based adhesive tape or sheet was produced in the same manner as in Example 1 except that hydrotalcite was not added.

(Evaluation)
About the olefin type adhesive tape or sheet obtained by Examples 1-7 and the comparative example 1, the adhesive force and the deterioration prevention property of wiring were measured or evaluated by the following measuring method or evaluation method. The evaluation results are shown in the columns of “Adhesive strength” and “Deterioration prevention” in Table 1, respectively.

(Measurement method of adhesive strength)
According to JIS Z 0237, the adhesive strength to the stainless steel plate was measured. Specifically, each olefin-based adhesive tape or sheet according to Examples 1 to 7 and Comparative Example 1 was cut into a size of 19 mm in width and 100 mm in length, and this 19 mm × 100 mm olefin-based adhesive tape or sheet was cut. Then, a stainless steel plate (SUS plate) was pressed by a method in which a 2 kg roller was reciprocated once, and allowed to stand under a standing condition of 23 ° C. × 20 minutes, and then a 180 ° peel peeling test (peeling angle: 180 °, tensile speed: The force required for the peeling (180 ° peeling force) (N / 19 mm) was measured by 300 mm / min, 23 ° C., 50% RH) to evaluate the adhesive strength.

(Evaluation method for preventing deterioration of wiring)
The olefinic adhesive tapes or sheets obtained in Examples 1 to 7 and Comparative Example 1 were each made of 10 vinyl chloride wirings having a coating layer made of a vinyl chloride resin composition containing a vinyl chloride resin, and olefins. 50% of the olefin-based wirings having a coating layer made of an olefin-based resin composition containing a base-based resin are cut to a length of 300 mm and mixed to form a bundle, and 50% A sample for evaluation was prepared by winding the sample so as to be covered at a surface area ratio of.

  This sample for evaluation was put into a gear oven (manufactured by Toyo Seiki Co., Ltd.) under the conditions of air replacement rate: 3 times / hour, temperature: 130 ° C. After charging the heating time shown in Table 1 (150 hours, 170 hours, 190 hours), the evaluation sample was taken out from the gear oven, allowed to cool to room temperature at room temperature, and then the olefin-based adhesive tape or sheet was unwound. . Then, take out the olefin-based wiring from the wiring bundle, bend the olefin-based wiring, observe the generation of cracks in the coating layer (wire coating layer), and determine the number of olefin-based wiring in which the crack has occurred. It was measured. The total number of olefin-based wirings is five.

  Of course, since it is determined that the cracked olefin-based wiring has deteriorated, the smaller the number of cracked olefin-based wirings, the better the deterioration prevention of the wiring.

  As is apparent from Table 1, the olefin-based adhesive tapes or sheets according to Examples 1 to 7 show no cracks in the olefin-based wirings in the evaluation of the deterioration prevention properties of the wirings, and the deterioration of the wirings. It was confirmed that the prevention property was extremely excellent. In particular, the olefin pressure-sensitive adhesive tapes or sheets obtained in Examples 1 to 6 have good adhesive strength, and can firmly bundle wiring bundles.

  In addition, since the olefin type adhesive tape or sheet which concerns on the comparative example 1 does not contain hydrotalcite in an adhesive layer, in evaluation of deterioration prevention property of wiring, all the olefin type wiring has cracked. It can be seen that the deterioration prevention property of the wiring is extremely low.

  Therefore, the olefin pressure-sensitive adhesive tape or sheet according to the example can suppress or prevent the deterioration of the wirings having the coating layer of the olefin resin. In particular, by adjusting the ratio of the hydrotalcite compound in the pressure-sensitive adhesive layer, excellent adhesiveness can also be exhibited. Therefore, the olefin-based adhesive tape or sheet according to the example can be suitably used as an adhesive tape or sheet for wiring for fixing or binding the wiring.

  In addition, since the base material in the olefin type adhesive tape or sheet | seat which concerns on an Example is comprised by the olefin resin, it does not contain a halogen atom and does not generate | occur | produce a harmful gas at the time of incineration.

Claims (6)

An adhesive tape or sheet having a support composed of an olefin resin composition containing an olefin resin and an adhesive layer formed on at least one surface of the support, wherein at least one of the supports A pressure-sensitive adhesive tape or sheet comprising a hydrotalcite-based compound in a pressure-sensitive adhesive layer formed on the surface. The pressure-sensitive adhesive tape or sheet according to claim 1, wherein the hydrotalcite compound is hydrotalcite. The pressure-sensitive adhesive tape or sheet according to claim 1 or 2, wherein the ratio of the hydrotalcite compound is 0.01% by weight or more based on the total amount of the resin component in the pressure-sensitive adhesive layer. The pressure-sensitive adhesive tape or sheet according to any one of claims 1 to 3, which is a wiring pressure-sensitive adhesive tape or sheet for fixing or binding a single or a plurality of wirings. The wiring is a bundle of olefin wiring having a coating layer made of an olefin resin composition containing an olefin resin and vinyl chloride wiring having a coating layer made of a vinyl chloride resin composition containing a vinyl chloride resin. The pressure-sensitive adhesive tape or sheet according to claim 4, which is a bundle of wires in a state of being in a shape. The pressure-sensitive adhesive tape or sheet according to claim 5, wherein the olefin-based resin composition according to the olefin-based wiring is a propylene-based resin composition containing a propylene-based resin.