JP2014201623A - Adhesive body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive body with which a label can be continuously and efficiently stuck to a tire by using a labelling device.SOLUTION: An adhesive body is formed by laminating an adhesive sheet having a support body and an adhesive layer composed of a hot melt type adhesive composition, and a release sheet. The adhesive composition is produced by compounding 15-40 mass% of a block copolymer, 30-70 mass% of an adhesiveness imparting agent, and 10-40 mass% of a plasticizer. The release sheet has a release base material and a releasing agent layer. The releasing agent layer includes a solventless silicone resin (A) and is a cured film of a releasing agent composition with viscosity at 25°C of 120-600 mPa s. The adhesive body is used by releasing a label portion with a labelling device after being worked into a label continuous body having the label portion in continuation, and when maximum initial releasing power and average releasing power measured in an environment of 23°C and 50% RH and in a condition of a releasing speed of 5 m/min and a releasing direction of 180° are denoted by f[mN/50 mm] and f[mN/50 mm] respectively, relations of f/f≤1.5 and f≤1,000 are satisfied.

Description

  The present invention relates to a pressure-sensitive adhesive body, and particularly to a pressure-sensitive adhesive body for a label continuum for labeling using a labeling apparatus.

Conventionally, a tire pressure-sensitive adhesive sheet called a tire display label or the like is known.
For the purpose of transmitting tire information to customers, the tire pressure sensitive adhesive sheet describes the tire manufacturer name and brand name, size (width, flatness ratio, rim ratio), usage precautions, etc. It is affixed around the tread surface of the tire.

A tire pressure-sensitive adhesive sheet generally comprises a film having an aluminum vapor deposition layer as a support, and a pressure-sensitive adhesive layer mainly composed of a rubber-based resin or an alkyl acrylate resin is laminated on the support. Has been.
For example, Patent Document 1 discloses a tire pressure-sensitive adhesive sheet including a support and a pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer includes a pressure-sensitive adhesive composition.
In Example 1 of this document, the pressure-sensitive adhesive composition was melted at 140 ° C. to form a pressure-sensitive adhesive layer on the release-treated surface of the release sheet, and then white-coated polyethylene terephthalate provided with an aluminum vapor-deposited layer The example which manufactured the adhesive sheet for tires with a peeling sheet by bonding the aluminum vapor deposition layer surface of a film and the adhesive layer on a peeling sheet is described.

Japanese Patent No. 4915920

When such a tire pressure-sensitive adhesive sheet is industrially affixed to a tire, from the viewpoint of productivity, a long continuous label is produced and continuously affixed to the tire using a labeling device. Is preferred.
However, Patent Document 1 does not describe a label continuum for attaching an adhesive sheet using a labeling device, and does not discuss an adhesive suitable for use as the label continuum. .

  Actually, a label continuum was prepared using the pressure-sensitive adhesive sheet described in Patent Document 1, and when an attempt was made to attach the pressure-sensitive adhesive sheet to a tire using a labeling device, the pressure-sensitive adhesive sheet was not fed out from the labeling device (labeler). In some cases, the label could not be applied well to the tire.

  This invention is made | formed in view of such a situation, and makes it a subject to provide the adhesive body which can stick a label on a tire continuously and efficiently using a labeling apparatus.

  The present inventors have intensively studied to solve the above problems. As a result, an adhesive body composed of a release sheet and an adhesive sheet, in which the release sheet satisfies a specific relationship between the maximum initial release force and the average release force, is continuously produced on the tire using a labeling device. The present inventors have found that labels can be attached well and have completed the present invention.

Thus, according to the present invention, the following pressure-sensitive adhesive bodies (1) and (2) are provided.
(1) A pressure-sensitive adhesive body comprising a support, a pressure-sensitive adhesive sheet formed on the support, and a pressure-sensitive adhesive layer made of a hot-melt pressure-sensitive adhesive composition, and a release sheet,
The hot melt type pressure-sensitive adhesive composition is a blend of 15 to 40% by weight of a block copolymer, 30 to 70% by weight of a tackifier, and 10 to 40% by weight of a plasticizer,
The release sheet has a release substrate and a release agent layer,
The release agent layer is a cured film of a release agent composition containing a solventless silicone resin (A) and having a viscosity at 25 ° C. of 120 to 600 mPa · s,
The pressure-sensitive adhesive body is used after being processed into a continuous label body having a label portion, and then peeling off the label portion with a labeling device.
In an environment of 23 ° C. and 50% RH, the maximum initial peel force measured at a peel rate of 5 m / min and a peel direction of 180 ° is f ₁ [mN / 50 mm], and the average peel force is f ₂ [mN / 50 mm]. The pressure-sensitive adhesive body satisfies the relationship of 1.0 ≦ f ₁ / f ₂ ≦ 1.5 and f ₁ ≦ 1000.
(2) The pressure-sensitive adhesive according to claim 1, which is attached to a tire.

The pressure-sensitive adhesive body of the present invention can be suitably used as a label continuum for labeling using a labeling apparatus.
According to the pressure-sensitive adhesive body of the present invention, a label can be stuck on a tire continuously and efficiently.

It is an adhesive body sectional view for showing the composition of the adhesive body of the present invention. It is an adhesive body perspective view for demonstrating an ear | edge part and a label part. It is a schematic diagram which shows a mode that the adhesive body of this invention is labeled on a tire. It is a schematic diagram which shows the case where an adhesive body is not labeled successfully on a tire. It is a peeling force measurement chart.

Hereinafter, the present invention will be described in detail.
The pressure-sensitive adhesive body of the present invention is obtained by laminating a pressure-sensitive adhesive sheet having (i) a support, a pressure-sensitive adhesive layer made of a hot-melt type pressure-sensitive adhesive composition formed on the support, and a release sheet. And
(Ii) The hot melt type pressure-sensitive adhesive composition is a blend of 15 to 40% by mass of a block copolymer, 30 to 70% by mass of a tackifier, and 10 to 40% by mass of a plasticizer.
(Iii) The release sheet has a release agent layer and a release substrate, and the release agent layer contains a solventless silicone resin (A) and has a viscosity at 25 ° C. of 120 to 600 mPa · s. It is a cured film of the release agent composition,
(Iv) The pressure-sensitive adhesive body is used after being processed into a label continuous body having a label portion continuously, and then peeling off the label portion with a labeling device. In an environment of 23 ° C. and 50% RH, a peeling speed of 5 m / When the maximum initial peel force measured under the conditions of min and peel direction of 180 ° is f ₁ [mN / 50 mm] and the average peel force is f ₂ [mN / 50 mm], 1.0 ≦ f ₁ / f ₂ ≦ 1.5 and f ₁ ≦ 1000 are satisfied.

(1) Adhesive sheet The adhesive sheet (1) used for the adhesive body of this invention has a support body (1a) and an adhesive layer (1b) which consists of a hot-melt-type adhesive composition as shown in FIG. .

<Support (1a)>
The support used in the pressure-sensitive adhesive sheet of the present invention is not particularly limited as long as it can carry a pressure-sensitive adhesive layer, and conventionally known ones can be used. Specifically, fine paper, glassine paper, coated paper, cast Paper such as coated paper and dust-free paper; laminated paper in which a thermoplastic resin such as polyethylene is laminated on these papers; a resin film formed of a thermoplastic resin or the like; paper, metal foil, and a composite thereof; be able to. Among these, it is preferable to use a resin film or synthetic paper because it is excellent in mechanical strength and can effectively prevent breakage of the support during peeling.

Examples of the resin film include films of polyethylene, polypropylene, polyethylene terephthalate, polyester, polystyrene, nylon, and the like.
Examples of the synthetic paper include single-layer or multi-layer synthetic paper having a void inside, which is formed by melt-mixing a synthetic resin, a filler, and an additive and then extruding the film.

  Moreover, when the pressure-sensitive adhesive body of the present invention is used for attaching a tire, the support is preferably provided with a metal layer such as an aluminum vapor deposition layer. By using the support having such a configuration, the surface of the support is blackened due to the transition of the constituent components of the tire by laminating the metal layer on the pressure-sensitive adhesive layer side to be described later. It can be effectively prevented. More specifically, amine-based anti-aging agents, aromatic oils, and the like, which are constituents of the rubber material constituting the tire, migrate to the support, which causes the support surface to become black. In some cases, such transitions can be blocked by providing a metal layer.

  Furthermore, as the support, an adhesive layer for facilitating label printing described later, a recording layer for enabling recording such as thermal transfer recording and ink jet recording, and the surface thereof are used. Those having an overcoat film or an overlaminate film for protection are also preferred. Furthermore, it is also possible to use a support in which information areas such as magnetic recording, bar code, and micro semiconductor element are provided in a part of the support.

The basis weight (mass per unit area) of the support is appropriately selected according to the purpose of use, but is usually 20 to 500 g / m ² , and preferably 50 to 300 g / m ² .

  The thickness of a support body is 10-150 micrometers normally, and it is preferable that it is 10-120 micrometers. When the thickness of the support is less than 10 μm, handling may become difficult, wrinkles may occur during pasting, or the support may be destroyed during peeling. On the other hand, when the thickness of the support is more than 150 μm, the flexibility to the tire or the like as the adherend decreases as the flexibility decreases, and the pressure-sensitive adhesive sheet may be easily peeled off.

<Adhesive layer (1b)>
The pressure-sensitive adhesive layer used for the pressure-sensitive adhesive body of the present invention is formed from a hot melt type pressure-sensitive adhesive composition (hereinafter simply referred to as “pressure-sensitive adhesive composition”). Here, the “hot melt type” pressure-sensitive adhesive refers to a pressure-sensitive adhesive that melts by heating and can be spread-applied, and exhibits adhesiveness and cohesion by cooling.
As an adhesive composition, what mix | blended the block copolymer, the tackifier, and the plasticizer in the predetermined ratio is used.

<Block copolymer>
As block copolymers, AB type diblock copolymers such as styrene / isobutylene block copolymer (SIB), styrene / butadiene block copolymer (SB), and styrene / isoprene block copolymer (SI); styrene -ABA type triblock copolymers such as isobutylene / styrene block copolymer (SIBS), styrene / butadiene / styrene block copolymer (SBS), styrene / isoprene / styrene block copolymer (SIS), etc. It is done.
These can be used individually by 1 type or in combination of 2 or more types.
Among these, since it is easy to impart tackiness, it is preferable to use an ABA-type triblock copolymer, and it is particularly preferable to use a styrene / isoprene / styrene block copolymer (SIS).

The usage-amount of a block copolymer is 15-40 mass% normally with respect to the whole quantity of an adhesive composition, Preferably it is 18-30 mass%.
When the added amount of the block copolymer is less than 15% by mass, the cohesive strength of the entire pressure-sensitive adhesive is reduced, and in summer when the outside air temperature is high, the characteristic is significantly deteriorated or the oozing from the cross-section of the pressure-sensitive adhesive sheet , And “ouse”) may occur, and further, the adhesive breakage at the time of punching may deteriorate. On the other hand, when the addition amount of the block copolymer exceeds 40% by mass, the adhesive force to the adherend is lowered and cannot be firmly bonded, and it may be difficult to apply the paste in a low temperature environment. In addition, the melt viscosity of the entire pressure-sensitive adhesive increases, and hot melt coating suitability may decrease.

In the present invention, an ABA triblock copolymer is preferably used as the block copolymer, and an AB diblock copolymer is preferably used in combination. It is preferable that the addition amount of a diblock copolymer is 30-80 mass% with respect to a triblock copolymer. When the addition amount of the diblock copolymer is less than 30% by mass, the effect of addition cannot be obtained, and when the addition amount of the diblock copolymer exceeds 80% by mass, the cohesive force is lowered, and after ouse or label peeling In some cases, adhesive residue is likely to occur.
When the ABA type triblock copolymer is a styrene / isoprene / styrene block copolymer (SIS), the AB type diblock copolymer used in combination is the same type of styrene / isoprene block copolymer ( SI) is preferably used.

  When using what has a polystyrene area | region (a repeating unit part derived from styrene) as a block copolymer, content of a polystyrene area | region is 10-20 in a block copolymer from viewpoints of adhesiveness, hot-melt coating suitability, etc. It is preferable that it is mass%.

<Tackifier>
The tackifier is not particularly limited, and conventionally known tackifiers can be used. For example, polymerized rosin, polymerized rosin ester, rosin resin such as rosin derivative; polyterpene resin, aromatic modified terpene resin and hydride thereof, terpene resin such as terpene phenol resin; coumarone / indene resin; aliphatic petroleum resin, Aromatic petroleum resins and their hydrides, petroleum resins such as aliphatic / aromatic copolymer petroleum resins; low molecular weight polymers of styrene or substituted styrene; and the like.
These can be used individually by 1 type or in combination of 2 or more types.

  Among these, in the present invention, the tackifier preferably includes a plurality of tackifiers having different softening points. By using two or more tackifiers having different softening points, the block copolymer is used. The rubber component and the resin component therein can be selectively compatible with each other.

Furthermore, in the present invention, at least one tackifier having a softening point of 60 to 100 ° C. measured in accordance with JIS K 2207, and at least one tackifier having a softening point of 120 ° C. or higher, It is more preferable to contain.
A tackifier having a softening point of 120 ° C. or higher is effective in developing tackiness at a high temperature, but the tackiness at a low temperature is impaired. Therefore, when used in combination with a tackifier having a softening point of 60 to 100 ° C., the adhesiveness from the low temperature region to the normal temperature region is specifically improved, and the adhesive can be applied to a wide range of temperatures from the low temperature region to the high temperature region. It is easy to adjust the force and cohesive force.

  The tackifier having a softening point of 120 ° C. or higher is preferably a polymerized rosin ester, and the tackifier having a softening point of 60 to 100 ° C. is an aromatic modified terpene resin, terpene phenol resin, aliphatic Petroleum resins, aromatic petroleum resins and aliphatic / aromatic copolymer petroleum resins are preferred. Since the former is easily selectively compatible with the rubber component and the latter is easily selectively compatible with the resin component in the block copolymer, it is a suitable combination as a tackifier.

  Moreover, the adhesive force with respect to the to-be-adhered body in each temperature, curved surface sticking property, and retention strength can be changed by changing the addition amount of superposition | polymerization rosin ester in the range of 0-18 mass%, for example.

  Thus, when using together the tackifier whose softening point is 120 degreeC or more and the tackifier whose softening point is 60-100 degreeC, it superposes | polymerizes with respect to the whole quantity (100 mass%) of a tackifier. The amount of rosin ester used is 5 to 25% by mass, preferably 10 to 25% by mass. When the use amount of the polymerized rosin ester is adjusted in this way, the curved surface sticking property and the adhesive strength at each temperature are not significantly lowered.

  The addition amount of the tackifier is preferably 30 to 70% by mass and more preferably 40 to 65% by mass with respect to the total amount of the adhesive composition. When the addition amount of the tackifier is less than 30% by mass, the adhesive strength is insufficient, and there is a case where it cannot be firmly bonded when pasted on a tire or the like. On the other hand, when the addition amount of the tackifier exceeds 70% by mass, there is a possibility that the glue breakage at the time of ouse or label punching process is deteriorated.

<Plasticizer>
It does not specifically limit as a plasticizer, A conventionally well-known thing can be used. For example, petroleum-based process oils such as paraffinic process oil, naphthenic process oil, or aromatic processells oil; natural oils such as castor oil or tall oil; dibases such as dibutyl phthalate, dioctyl phthalate or dibutyl adipate Dialkyl acid; low molecular weight liquid polymer such as liquid polybutene or liquid polyisoprene; and the like.
Among these, paraffin-based process oil is preferable because it is particularly stable against heat and ultraviolet rays and can provide a pressure-sensitive adhesive composition excellent in hue.
In addition, it is possible to use a paraffinic process oil in combination with another plasticizer. In this case, it is preferable to use 60% by mass or more of paraffinic process oil with respect to the total amount of plasticizer (100% by mass).

  The addition amount of a plasticizer is 10-40 mass% normally with respect to the whole quantity of an adhesive composition, Preferably it is 15-30 mass%. If the added amount of the plasticizer is less than 10% by mass, the plasticizer is not sufficiently plasticized, the adhesive strength is insufficient, and it may be unable to adhere firmly when pasted on a tire or the like. On the other hand, when the addition amount of the plasticizer exceeds 40% by mass, there is a possibility that the glue breakage during ouse or label punching process is deteriorated.

By using the pressure-sensitive adhesive composition containing the block copolymer, the tackifier and the plasticizer as described above, it becomes easy to adjust the adhesive force to the adherend at a plurality of temperatures. In particular, when used as a pressure-sensitive adhesive sheet for tires, even when a studless tire is used as an adherend in winter when the outside air temperature is low, it can be attached with high accuracy with little lifting and peeling. In addition, even in the summer when the outside air temperature is high, there is no problem of floating after sticking, and it is not necessary to use a solvent or dry when laminating the adhesive layer, making the manufacturing device compact. Or manufacturing time can be shortened.
The softening point of the obtained tackifier is usually 70 to 90 ° C.

  The pressure-sensitive adhesive composition includes various additives as required, such as fillers, inorganic particles, organic particles, lightening agents, fluidizing agents, pigments, dyes, colorants, antioxidants, ultraviolet absorbers. It is also preferable to add a conventionally known additive such as a light stabilizer.

An adhesive layer can be formed by apply | coating on the peeling process surface of a peeling sheet (1).
Examples of methods for applying the pressure-sensitive adhesive composition include existing methods such as knife coating, roll coating, and die coating.

  As a method for forming the pressure-sensitive adhesive sheet, for example, a predetermined amount of a block copolymer, a tackifier, a plasticizer, and optionally other additives are mixed by a conventionally known method to prepare a pressure-sensitive adhesive composition. Then, this is melted and (i) applied onto a release agent layer of a release sheet to be described later, dried as necessary to form an adhesive layer, and then bonded to the support (transfer coating) (Ii) Apply directly to the support and dry as necessary to form an adhesive layer, and then apply the adhesive layer side of the adhesive sheet and the release agent layer side of the release sheet A method of combining them (direct coating method) and the like can be preferably exemplified.

  The application device for the pressure-sensitive adhesive composition is not particularly limited, and can be applied using a conventionally known coating machine such as a roll coater, a knife coater, or a die coater.

The basis weight of the adhesive layer is not particularly limited, but is preferably 5 to 100 g / ^{m 2,} and more preferably 10 to 60 g / ^{m 2.} If the amount is too small, adhesion to an adherend such as a tire may be insufficient. On the other hand, if the amount is too large, not only will it cause ouse, but there is a possibility that it will cause a problem during printing and punching, which is not preferable.

  In addition, the adhesive composition which has the said ABA type block copolymer as a main component can be shape | molded as it is, and can be used as an adhesive composition on the property. Therefore, the pressure-sensitive adhesive composition formed into a predetermined shape can be heat-melted once using a known coating machine, then applied in a solution state, and solidified to form a pressure-sensitive adhesive layer.

Conventionally, a tire pressure-sensitive adhesive sheet is usually used in a high coating amount (for example, 60 g / m ² or the like), and with a solvent-based pressure-sensitive adhesive, the drying process is often the rate-limiting factor.
On the other hand, when using the adhesive composition which does not use a solvent, a drying process is not required but a coating speed can be improved dramatically. Moreover, not only can the production cost be reduced, but there is also a great merit from the viewpoint of environmental protection.

The pressure-sensitive adhesive sheet obtained as described above includes a label portion for attaching to an adherend and an ear portion.
In FIG. 2, 3 indicates an ear part, and 4 indicates a label part.
In the present invention, the ear part 3 is peeled and removed from the release sheet 2 to be described later to form a continuous label, and then the label part 4 (printed or the like) remaining on the release sheet is peeled off by a labeling device. Remove from the sheet and attach to the adherend.
There is no restriction | limiting in particular as a method of forming an ear | edge part and a label part in an adhesive sheet, A conventionally well-known method is employable.

(2) Release sheet The release sheet of the pressure-sensitive adhesive body of the present invention has a release substrate (2a) and a release agent layer (2b).

<Peeling substrate (2a)>
As a peeling base material, it can select from the well-known base materials known as a base material of a peeling sheet, and can use it suitably, The thing similar to having illustrated as the said support body is mentioned.
Although the basic weight (mass per unit area) of a peeling base material is suitably selected according to the intended purpose, it is 20-500 g / m < ² > normally, Preferably it is the range of 50-300 g / m < ² >.

<Release agent layer (2b)>
The release agent layer is a cured film of a release agent composition containing a solventless silicone resin (A) and having a viscosity at 25 ° C. of 120 to 600 mPa · s.
In the release agent layer composition, a crosslinking agent (hereinafter also referred to as “component (B)”) is used in order to cure a solventless silicone resin (hereinafter sometimes referred to as “component (A)”). And a platinum group metal catalyst (hereinafter sometimes referred to as “component (C)”) are preferably used.

  The component (A) is not particularly limited as long as it is a so-called solventless silicone resin that does not substantially contain an organic solvent. Among these, addition reaction type solventless silicone resins are preferable, and polyorganosiloxanes having alkenyl groups are more preferable.

  The polyorganosiloxane having an alkenyl group is a compound obtained by (co) polycondensation of a silane compound having an alkenyl group and a hydrolyzable functional group, or a silane compound mixture containing the silane compound. There is no restriction | limiting in the principal chain structure of the polyorganosiloxane obtained, Any of linear shape, ladder shape, and hook shape may be sufficient.

  Examples of the alkenyl group include alkenyl groups having 2 to 10 carbon atoms such as vinyl group, 1-propenyl group, 2-propenyl group, butenyl group, pentyl group, hexenyl group, and heptenyl group. Among these, a 2-6 alkenyl group is preferable and a vinyl group is especially preferable.

  Examples of the silane compound having an alkenyl group and a hydrolyzable functional group include vinyldimethylmethoxysilane, vinyltrimethoxysilane, allyltriethoxysilane, and hexenyltrimethoxysilane.

  The mass average molecular weight of the polyorganosiloxane having an alkenyl group is not particularly limited, but is usually 2000 to 25,000, preferably 5000 to 20,000.

In general, the content of the alkenyl group in the component (A) is preferably 0.1 to 2% by mass, and more preferably 0.2 to 1.5% by mass.
By using such a compound as the component (A), the maximum initial peeling forces f ₁ and f ₂ described later can be set to preferable values, and the pressure-sensitive adhesive body of the present invention suitable for high-speed automatic labeling can be obtained. it can.
In addition, as (A) component, you may use a commercial item as it is.

  (A) The viscosity in 25 degreeC of a component is 100-600 mPa * s normally, it is preferable that it is 250-500 mPa * s, and it is more preferable that it is 300-400 mPa * s. By setting it as such a value, the applicability | paintability to a peeling base material and peeling force of the obtained releasing agent layer can be made more excellent.

  As the component (B), dimethylhydrogensiloxy group end-capped dimethylsiloxane-methylhydrogensiloxane copolymer, trimethylsiloxy group end-capped dimethylsiloxane-methylhydrogensiloxane copolymer, trimethylsiloxy group end-capped methylhydrogen poly Examples thereof include organohydrogenpolysiloxanes such as siloxane and poly (hydrogensilsesquioxane). These may be used alone or in combination of two or more. A cured film is formed by an addition reaction between the hydrosilyl group of component (B) and the alkenyl group of component (A). In addition, it is preferable to add 0.5-2 mass parts with respect to 100 mass parts of (A) component, and, as for (B) component, it is more preferable to add 0.8-1.5 mass parts.

  Examples of the component (C) include particulate platinum, particulate platinum adsorbed on a carbon powder carrier, chloroplatinic acid, alcohol-modified chloroplatinic acid, olefin complexes of chloroplatinic acid; palladium; rhodium catalyst; .

The viscosity of the release agent composition at 25 ° C. before curing is usually 120 to 600 mPa · s, preferably 150 to 550 mPa · s. When the viscosity at 25 ° C. before curing of the release agent composition is less than 120 Pa · s, when the release substrate is paper, the release agent composition may be excessively impregnated into the release substrate. When the viscosity at 25 ° C. before curing of the release agent composition exceeds 600 mPa · s, coating may be difficult, which is not preferable.
Moreover, the applicability | paintability of a release agent composition can be made favorable by adjusting a viscosity to the said range.

The release agent composition does not substantially contain a solvent, and can be applied as it is. It is not necessary to dry and remove the solvent, and the operation is simple and economical. It's kind.
In addition to the components (A) to (C), additives such as reaction inhibitors, adhesion improvers, viscosity modifiers such as liquid α-olefin components are added to the release agent composition as desired. May be.
The reaction inhibitor is added for the purpose of suppressing the activity of the catalyst and imparting storage stability at room temperature. Examples of the reaction inhibitor include acetylene compounds, oxime compounds, organic nitrogen compounds, organic phosphorus compounds, and organic chlorine compounds.

  There is no restriction | limiting in particular as a manufacturing method of a peeling sheet. For example, a release agent composition is prepared by mixing the component (A), the component (B), the component (C), and optionally other components by a conventionally known method. 2a), and a method of preparing the release agent layer by applying heat treatment and curing.

  Examples of the method for applying the release agent composition include existing methods such as a gravure coating method, a bar coating method, a spray coating method, a knife coating method, a roll coating method, and a die coating method.

The basis weight of the release agent layer is not particularly limited, but is preferably 0.05-5 g / ^{m 2,} and more preferably 0.1 to 3.0 g / ^{m 2.}
The heat treatment is usually performed at 80 to 200 ° C., preferably 120 to 160 ° C., for several seconds to several tens of minutes, preferably 10 seconds to 1 minute, depending on the type of the release agent composition used.

(3) Adhesive Body The adhesive body of the present invention is formed by laminating the adhesive sheet 1 and the release sheet 2 as shown in FIGS. 1 and 2, and the adhesive sheet 1 includes the label portion 4 and the ear portion 3. The ear part 3 is peeled and removed from the release sheet 2 to form a continuous label body 5, and then the label part 4 is peeled off with a labeling device.

  The pressure-sensitive adhesive body of the present invention can be produced, for example, as follows. That is, as described above, (i) after forming the release sheet 2, the adhesive composition is applied on the release agent layer 2a to form the adhesive layer 1b, and then bonded to the support 1a, or (Ii) The pressure-sensitive adhesive composition is applied to the support 1a to form the pressure-sensitive adhesive layer 1b, and then the pressure-sensitive adhesive layer 1b side of the pressure-sensitive adhesive sheet 1 and the release agent layer 2a side of the release sheet 2 are bonded together. After the pressure-sensitive adhesive body 10 is formed by the method, it can be manufactured by inserting a notch 6 so as to surround a predetermined portion from the surface side of the support 1a of the pressure-sensitive adhesive sheet 1 of the pressure-sensitive adhesive body 10 and performing a punching process. it can. By this punching process, the label portion 4 surrounded by the notches 6 and the ear portions 3 having both end portions in the width direction other than the label portion 4 are formed on the adhesive sheet 1. Later, the ear part 3 is peeled off and removed from the release sheet 2, the label part 4 is left on the release sheet 2, and the label continuous body 5 on which the label part 4 is left is printed with a product name or the like. Used as a label.

  In the pre-process or post-process of the punching process, printing is performed on the upper surface of the support 1a of the label unit 4 using a printing machine.

The adherend is not particularly limited, but is preferably a tire.
An example of a labeling labeling device is shown in FIG. The long continuous label body 5 having the printed label portion 4 is carried in the longitudinal direction, that is, in the right direction in FIG. In front of the tire 7 that is the adherend, the release sheet is wound downward, but at this time, the label portion 4 is peeled off from the release sheet 2 and pushed forward (rightward in the figure) and attached to the tire 7. . As the tire 7 rotates in the direction of the arrow in the figure, the extruded label portion 4 is attached to the tire. This operation is continuously performed, and labels are attached to tires (not shown) that move one after another.

When the release sheet is wound downward, if the label part is not smoothly released from the release sheet, as shown in FIG. 4, the label part is wound together with the release sheet below the figure, and the label part is attached to the tire. Not only cannot be performed, but the operation of the apparatus must be stopped, resulting in a decrease in yield and workability.
Therefore, when the release sheet is wound downward, the label portion needs to be smoothly released from the release sheet and pushed forward.

The pressure-sensitive adhesive body of the present invention has a maximum initial peel force of f ₁ [mN / 50 mm] and an average peel force measured under conditions of a peel rate of 5 m / min and a peel direction of 180 ° in an environment of 23 ° C. and 50% RH. When f ₂ [mN / 50 mm], f ₁ / f ₂ is 1.0 ≦ f ₁ / f ₂ ≦ 1.5, preferably 1.0 ≦ f ₁ / f ₂ ≦ 1.45, and more preferably 1.0 ≦ f ₁ / f ₂ ≦ 1.4, and f ₁ satisfies the relationship of f ₁ ≦ 1000.
When the value of f ₁ / f ₂ is less than 1.0, a phenomenon that the label part is peeled off together with the ear part when the ear part is peeled off from the release sheet, that is, so-called double up tends to occur.
When the value of f ₁ / f ₂ is larger than 1.5, as shown in FIG. 4, in the sticking process, a problem that the label part is caught together with the release sheet in the lower part of the figure is likely to occur.

In addition, f ₂ is preferably 200 ≦ f ₂ ≦ 1000, and preferably 300 ≦ f ₂ ≦ 950, from the viewpoint of the retention of the label part on the release sheet and the ease of release from the release sheet. More preferred.

The values of f ₁ and f ₂ can be recognized by performing a peel force measurement test using a tensile tester. That is, in an environment of 23 ° C. and 50% RH, the pressure-sensitive adhesive sheet was fixed, the release sheet was pulled at a peeling speed of 5 m / min, and a peeling direction of 180 °. Thus, the peel force can be measured automatically, and the obtained peel force measurement chart can be used. FIG. 5 shows an example of a peel force measurement chart. In FIG. 5, the vertical axis represents peeling force and the horizontal axis represents elapsed time.

In order to make the value of the maximum initial peel force f _1, the value of the average peel force f ₂ , and the relationship between the maximum initial peel force f ₁ and the average peel force f ₂ as described above, It is only necessary to appropriately select the type and amount of the component (A) used in the release agent layer as the release sheet, and prepare an adhesive.
That is, since the pressure-sensitive adhesive body of the present invention has the above-described configuration of the pressure-sensitive adhesive sheet and the release sheet, f ₁ and f ₂ can be set to the above values. Therefore, as shown in FIG. When labeling is performed using a labeling device, the label can be smoothly and continuously applied to the adherend from the label continuous body.

  EXAMPLES Next, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited to the following Example.

  The “A) component“ polyorganosiloxanes A1 to A4 having a vinyl group ”and the“ B ”component“ organohydrogenpolysiloxane ”used in the following Examples and Comparative Examples are as follows.

(A) Component / polyorganosiloxane having vinyl group A1: Trade name “DMS-V22”, viscosity 200 mPa · s, molecular weight: 9400, vinyl group amount: 0.5% by mass, Gelest Co., poly with vinyl group Organosiloxane A2: trade name “DMS-V25”, viscosity 500 mPa · s, molecular weight: 17200, vinyl group weight: 0.4% by mass, Gelest Co., polyorganosiloxane A3: trade name “DMS-V21” ”, Viscosity 100 mPa · s, molecular weight: 6000, vinyl group amount: 1.0% by mass, Gelest Co., polyorganosiloxane A4 having a vinyl group: trade name“ DMS-V31 ”, viscosity 1000 mPa · s, molecular weight: 28000 , Vinyl group content: 0.22% by mass, manufactured by Gelest

(B) Component / organohydrogenpolysiloxane B1: Trade name “HMS-991”, viscosity 22 mPa · s, molecular weight: 1600, hydrosilyl group content: 1.67% by mass, manufactured by Gelest

[Example 1]
<Preparation of release sheet>
As the component (A), 90 parts by mass of the polyorganosiloxane A1 having a vinyl group and 10 parts by mass of the polyorganosiloxane A2 having a vinyl group have 1.1 parts of the organohydrogenpolysiloxane B1 as the component (B). Next, 0.5 parts by mass of the platinum complex (trade name “SRX-212”, manufactured by Toray Dow Corning Co., Ltd.) as component (C) is added relative to the total of components (A) and (B). The release agent composition 1 was prepared by adding and mixing.

Next, the release agent composition 1 was uniformly applied to a glassine paper having a basis weight of 80 g / m ² as a release substrate using a gravure coater so that the application amount was 1.0 g / m ² , and 140 ° C. Then, the release sheet 2 was prepared by heating and curing for 30 seconds.

<Preparation of adhesive sheet and adhesive sheet body>
21.2 parts by mass of Clayton D-1112 (SIS, diblock amount: 40% by mass, styrene region content: 15% by mass, manufactured by Kraton Polymer Japan, hereinafter referred to as “D-1112”), and a tackifier 46.5 parts by mass of T-480X (softening point: 80 ° C., aliphatic / aromatic copolymer petroleum resin, manufactured by Mitsui Chemicals) and Pencel D-160 (softening point: 160 ° C., polymerized rosin ester, Arakawa 10.1 parts by mass of “D-160” manufactured by Kagaku Kogyo Co., Ltd. and pure flex SNH-100SP (paraffinic oil process, manufactured by Sankyo Oil Chemical Co., Ltd., hereinafter “SNH-100SP”) as a plasticizer. 21.2 parts by mass and 1 Irganox 1010 (hindered phenol antioxidant, manufactured by Ciba Specialty Chemicals) as an antioxidant And amount unit, a uniformly mixed to prepare a pressure-sensitive adhesive composition 1.

Next, the obtained pressure-sensitive adhesive composition 1 was melted under the condition of 140 ° C., and applied onto the release-treated surface of the release sheet 2 using a die coater so that the coating amount was 50 g / m ^2. Thus, an adhesive layer was formed.

  Next, a white coated polyethylene terephthalate film [white coated (including ethylene vinyl acetate resin and titanium oxide) 1 μm / polyethylene terephthalate film 12 μm / aluminum deposited layer] with an aluminum deposited layer, and an adhesive on the release sheet The layers were bonded together to produce a pressure-sensitive adhesive body 1.

[Example 2]
In Example 1, instead of 90 parts by mass of the polyorganosiloxane A1 having a vinyl group and 10 parts by mass of the polyorganosiloxane A2 having a vinyl group, the component (A) was changed to 100 parts by mass of a polyorganosiloxane A1 having a vinyl group. The release agent composition 2 was prepared in the same manner as in Example 1 except that the amount of the component (B) used was changed from 1.1 parts by mass to 1.2 parts by mass. The pressure-sensitive adhesive body 2 was prepared in the same manner as in Example 1.

Example 3
In Example 1, instead of 90 parts by mass of the polyorganosiloxane A1 having a vinyl group and 10 parts by mass of the polyorganosiloxane A2 having a vinyl group, the component (A) was changed to 100 parts by mass of a polyorganosiloxane A2 having a vinyl group. The release agent composition 3 was prepared in the same manner as in Example 1 except that the amount of the component (B) used was changed from 1.1 parts by mass to 1.2 parts by mass. The pressure-sensitive adhesive body 3 was prepared in the same manner as in Example 1.

Example 4
In Example 1, instead of 90 parts by mass of the polyorganosiloxane A1 having a vinyl group and 10 parts by mass of the polyorganosiloxane A2 having a vinyl group, the component (A) is 25 parts by mass of a polyorganosiloxane A3 having a vinyl group; The release agent composition was the same as in Example 1 except that 75 parts by mass of polyorganosiloxane A1 having a vinyl group was used and the amount of component (B) used was changed from 1.1 parts by mass to 1.2 parts by mass. Article 4 was prepared, and the pressure-sensitive adhesive 4 was prepared in the same manner as in Example 1 using the release agent composition 4.

[Comparative Example 1]
In Example 1, instead of 90 parts by mass of the polyorganosiloxane A1 having a vinyl group and 10 parts by mass of the polyorganosiloxane A2 having a vinyl group, the component (A) was changed to 100 parts by mass of a polyorganosiloxane A3 having a vinyl group. The release agent composition 5 was prepared in the same manner as in Example 1 except that the amount of the component (B) used was changed from 1.1 parts by weight to 2.2 parts by weight. The pressure-sensitive adhesive body 5 was produced in the same manner as in Example 1.

[Comparative Example 2]
In Example 1, instead of 90 parts by mass of the polyorganosiloxane A1 having a vinyl group and 10 parts by mass of the polyorganosiloxane A2 having a vinyl group, the component (A) is 25 parts of a polyorganosiloxane A4 having a vinyl group; A release agent composition 6 was prepared in the same manner as in Example 1 except that 75 parts of polyorganosiloxane A2 was used and the amount of component (B) used was changed from 1.1 parts by weight to 1.5 parts by weight. Then, a pressure-sensitive adhesive body 6 was produced using the release agent composition 6 in the same manner as in Example 1.

(Comparative Example 3)
In Example 1, a solvent-type silicone release agent containing a polyorganosiloxane having a vinyl group and an organohydrogenpolysiloxane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KS-835”, solid content: 30% by mass, viscosity The release agent composition 7 was prepared by adding 0.3 parts by mass of platinum catalyst (trade name “PL50T” manufactured by Shin-Etsu Chemical Co., Ltd.) and 200 parts by mass of toluene to 100 parts by mass of 5000 mPa · s). A pressure-sensitive adhesive body 7 was produced using the composition 7 in the same manner as in Example 1.

For the pressure-sensitive adhesives 1 to 7 obtained in Examples 1 to 4 and Comparative Examples 1 to 3, the maximum initial peeling force f ₁ and the average peeling force f ₂ are measured by the method shown below, and a labeling test is further performed. evaluated. The measurement results and evaluation results are shown in Table 1 below.

[Maximum initial peel force and average peel force]
The adhesive bodies 1 to 7 obtained in Examples 1 to 4 and Comparative Examples 1 to 3 were cut into a width of 50 mm and a length of 150 mm, respectively, to prepare test pieces. In an environment of 23 ° C. and 50% RH, the pressure-sensitive adhesive sheet of each test piece was fixed, and the peeling force was measured by pulling the peeling sheet at a peeling speed of 5 m / min and a peeling direction of 180 °.

The maximum initial peel force f ₁ [mN / 50 mm] and the average peel force f ₂ [mN / 50 mm] were certified from the obtained peel force measurement chart (see FIG. 5).

[Labeling test]
The pressure-sensitive adhesive bodies 1 to 7 obtained in Examples 1 to 4 and Comparative Examples 1 to 3 are each processed into a label continuous body as shown in FIG. And evaluated according to the following evaluation criteria.
○: All label parts were pasted.
Δ: 1 to 4 label portions could not be attached.
X: 5 or more label portions could not be attached.

From Table 1, the adhesive bodies of the present invention of Examples 1 to 4 were excellent in the labeling test results. Meanwhile, _{f 1} is greater than _1000, the pressure-sensitive adhesive body of f 1 / _{f 2} greater than 1.5 Comparative Examples 1 and 2, _and, pressure-sensitive adhesive body of f 1 / _{f 2} greater than 1.5 Comparative Example 3, The labeling test result was inferior.

DESCRIPTION OF SYMBOLS 1 ... Adhesive sheet 2 ... Release sheet 1a ... Support body 1b ... Adhesive layer 2a ... Release agent layer 2b ... Release base material 3 ... Ear part 4 ... Label Part 5: Label continuous body 6 ... Incision 7 ... Tires 10, 11 ... Adhesive body

Claims (2)

A pressure-sensitive adhesive body comprising a support, a pressure-sensitive adhesive sheet formed on the support, and a pressure-sensitive adhesive layer made of a hot-melt type pressure-sensitive adhesive composition, and a release sheet,
The hot melt type pressure-sensitive adhesive composition is a blend of 15 to 40% by weight of a block copolymer, 30 to 70% by weight of a tackifier, and 10 to 40% by weight of a plasticizer,
The release sheet has a release substrate and a release agent layer,
The release agent layer is a cured film of a release agent composition containing a solventless silicone resin (A) and having a viscosity at 25 ° C. of 120 to 600 mPa · s,
The pressure-sensitive adhesive body is used after being processed into a continuous label body having a label portion, and then peeling off the label portion with a labeling device.
In an environment of 23 ° C. and 50% RH, the maximum initial peel force measured at a peel rate of 5 m / min and a peel direction of 180 ° is f ₁ [mN / 50 mm], and the average peel force is f ₂ [mN / 50 mm]. The pressure-sensitive adhesive body satisfies the relationship of 1.0 ≦ f ₁ / f ₂ ≦ 1.5 and f ₁ ≦ 1000.   The pressure-sensitive adhesive body according to claim 1, which is attached to a tire.

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