JP5118349B2 - Adhesive body and method for producing adhesive body - Google Patents

Description

  The present invention relates to a pressure-sensitive adhesive body used for pressure-sensitive adhesive labels and the like, and particularly relates to a pressure-sensitive adhesive body to which a pressure-sensitive adhesive is applied inline.

  Adhesives such as pressure-sensitive adhesive labels are, for example, a pressure-sensitive adhesive sheet provided with a pressure-sensitive adhesive layer on one side of a pressure-sensitive adhesive sheet substrate, a pressure-sensitive adhesive sheet on one side of the pressure-sensitive adhesive sheet base material, and a release agent. It is configured to be adhered so that the pressure-sensitive adhesive layer is in contact with the layer. The pressure-sensitive adhesive body is demanded to reduce the burden on the environment and improve productivity. In order to meet these demands, a solventless type silicone is being used as a release agent in recent years. Solventless silicone does not use an organic solvent, so it can be expected to reduce environmental burdens, and can be coated at a higher speed than solvent type, so that productivity can be expected.

  Patent Document 1 shows one embodiment of a solventless release agent composition. Here, the main polymer of the diorganopolysiloxane includes a diorganopolysiloxane having a silicon atom-bonded hydrogen atom at the molecular chain end, and an organohydrogenpolysiloxane having at least three silicon atom-bonded hydrogen atoms in the molecular side chain. A release agent composition in which the above mixture is added as a crosslinking agent is disclosed (see Patent Document 1). This release agent composition can form a peelable film having high speed dependency by using the above two kinds of crosslinking agents.

  For pressure-sensitive adhesives, it has been attempted to use acrylic emulsion pressure-sensitive adhesives that do not use organic solvents as pressure-sensitive adhesives because of demands for reducing environmental impact and improving productivity. Low viscosity emulsion adhesives are being used to improve and enable high speed coating.

As a method of applying the release agent and the pressure-sensitive adhesive to the base material, there is an off-line application in which the release sheet coated with the release agent is once wound up and then the pressure-sensitive adhesive is applied in another coating process. . As another coating method, after the release agent is applied by a coating apparatus having a plurality of coating heads, the release sheet is not taken up once, and the adhesive is continuously applied on the release agent. In-line coating is known. In-line coating can be performed continuously, and can produce an adhesive with higher productivity than offline coating (see, for example, Patent Document 2).
JP 2001-335747 A Japanese Patent No. 3503855

  However, when applying a low-viscosity emulsion adhesive continuously in-line after applying a solvent-free release agent, the adhesive is difficult to apply evenly on the release agent layer, and the adhesive is not applied. There is a problem that the part that is the work, so-called glue repellency is likely to occur.

  Therefore, the present invention has been made in view of such problems. Even if a low-viscosity emulsion adhesive is continuously applied in-line on a solvent-free silicone release agent layer, the paste is used. An object is to provide a pressure-sensitive adhesive that is less likely to repel.

The pressure-sensitive adhesive body according to the present invention has a pressure-sensitive adhesive sheet provided with a pressure-sensitive adhesive layer on one surface of a pressure-sensitive adhesive sheet base material, and a pressure-sensitive adhesive sheet provided on one surface of the pressure-sensitive adhesive sheet base material. In the pressure-sensitive adhesive body that is adhered and configured so that the pressure-sensitive adhesive layer is in contact, the pressure-sensitive adhesive layer is coated with an emulsion pressure-sensitive adhesive having a viscosity of 100 to 2000 mPa · s before the release layer. The release agent layer is represented by the following general formula (I) as an organopolysiloxane having at least two alkenyl groups in one molecule having a mass average molecular weight of 1000 to 20,000 ( It is formed by curing an addition-reaction type solventless release agent composition containing the component (A) and the component (B) represented by the general formula (II), and the respective masses of the component (A) and the component (B). The average molecular weight is 800-8000 Component (A) / (B) component weight ratio is characterized in that it is a 1 / 1-100 / 1.
HR ³ ₂ SiO (R ₂ SiO) _m OSiR ³ ₂ H (I)
R ₃ SiO (HRSiO) _n OSiR ₃ (II)
However, in the general formulas (I) and (II), R is the same or different monovalent hydrocarbon group having no aliphatic unsaturated bond, R ³ is H or R, and m and n are positive integers. is there.

  The viscosity of the release agent composition is preferably 50 to 3000 mPa · s. Moreover, it is preferable that an emulsion adhesive is an acrylic emulsion adhesive.

  In the method for producing an adhesive body according to the present invention, a release agent is applied to one surface of a release sheet substrate to form a release agent layer, and then the adhesive is continuously applied on the release agent layer. In the method for producing a pressure-sensitive adhesive layer for forming a pressure-sensitive adhesive layer, the pressure-sensitive adhesive is an emulsion pressure-sensitive adhesive having a viscosity of 100 to 2000 mPa · s before coating, and the release agent layer is formed with a mass average molecular weight of 1000 to 20, 000 organopolysiloxane having at least two alkenyl groups in one molecule, component (A) represented by general formula (I) and component (B) represented by general formula (II) as a crosslinking agent And an addition reaction type solventless type release agent composition comprising: a component (A) and a component (B) each having a weight average molecular weight of 800 to 8000, component (A) / component (B) The mass ratio of the components is from 1/1 to 100/1. And butterflies.

  By adding the component (B) in addition to the component (A) as a crosslinking agent to the release agent composition, it is possible to prevent glue repelling when applying a low-viscosity emulsion adhesive on the release agent in-line. In addition, the adhesion of the release agent to the release sheet substrate can be improved.

Hereinafter, the present invention will be described in more detail using embodiments.
FIG. 1 is a schematic cross-sectional view showing an adhesive body according to an embodiment of the present invention. The pressure-sensitive adhesive body 10 is peeled off from a pressure-sensitive adhesive sheet 23 having a pressure-sensitive adhesive layer 22 on one surface of a pressure-sensitive adhesive sheet base material 21 and a pressure-sensitive adhesive sheet 23 having a pressure-sensitive adhesive layer 22 on one surface of the pressure-sensitive adhesive sheet base material 21. The adhesive layer 12 is adhered and configured so as to be in contact with the adhesive layer 22.

  On the release sheet substrate 11, for example, a release agent layer 12 and an adhesive layer 22 are formed continuously by so-called in-line coating using an in-line coating apparatus having a plurality of coating heads. That is, first, after the release agent composition is coated on the release sheet substrate 11, the release agent layer 12 is heated or irradiated with ultraviolet rays in addition to the heating to form a cured release agent layer 12. A release sheet 13 is produced. Then, the release sheet 13 is not wound up, and an adhesive is continuously applied onto the release agent layer 12 to form an adhesive layer 22. On the pressure-sensitive adhesive layer 22, a pressure-sensitive adhesive sheet substrate 21 is further bonded, whereby the pressure-sensitive adhesive body 10 is manufactured. Examples of methods for applying the release agent composition and the pressure-sensitive adhesive include existing methods such as gravure coating, bar coating, spray coating, spin coating, knife coating, roll coating, and die coating. Can be used.

The release sheet substrate 11 has a function of supporting the release agent layer 12. For example, a polyester film such as a polyethylene terephthalate film or a polybutylene terephthalate film, a polyolefin film such as a polypropylene film or a polymethylpentene film, or a polycarbonate film Plastic film such as aluminum, stainless steel and other metal foils, glassine paper, high quality paper, coated paper, impregnated paper, synthetic paper, etc., and these paper base materials laminated with a thermoplastic resin such as polyethylene. ing. The basis weight of the release sheet base material 11 is not particularly limited, but is preferably 5~300g / m ^2, and more preferably 10 to 200 g / m ^2.

  The release agent composition is an addition reaction type solventless type release agent composition having an organopolysiloxane as a main polymer, a cross-linking agent, and a catalyst added thereto, and, if desired, a reaction inhibitor, A release adjusting agent, an adhesion improving agent, or the like may be added. In addition, in the curing step after applying the release agent, when performing ultraviolet irradiation in addition to heating, a photoinitiator may be added.

As the main polymer organopolysiloxane, an organopolysiloxane having at least two alkenyl groups in one molecule having a mass average molecular weight of 1000 to 20,000 is used. This organopolysiloxane is represented by, for example, the general formula (III). It is.
R ¹ R ² ₂ SiO (R ₂ SiO) _p (RR ² SiO) _q SiR ² ₂ R ¹ (III)
In the general formula (III), R is the same or different monovalent hydrocarbon group having no aliphatic unsaturated bond, R ¹ is an alkenyl group, R ² is R or R ¹ , and p and q represent natural numbers 12 ≦ (p + q) ≦ 270.

Examples of the alkenyl group represented by R ¹ include those having 2 to 10 carbon atoms such as a vinyl group, an allyl group, a propenyl group, and a hexenyl group. R has 1 to 12 carbon atoms, preferably 1 to 10 carbon atoms, and examples thereof include alkyl groups such as a methyl group, an ethyl group and a propyl group, and aryl groups such as a phenyl group and a tolyl group. From this point, it is preferable that 80 mol% or more is a methyl group.

  As the crosslinking agent, the component (A) which is an organopolysiloxane having a silicon atom-bonded hydrogen atom only at the molecular chain terminal and the polyorganohydrogensiloxane having no silicon atom-bonded hydrogen atom at the molecular chain terminal (B) A mixture with the ingredients is used. Specifically, the component (A) is represented by the general formula (I), and the component (B) is represented by the general formula (II).

HR ³ ₂ SiO (R ₂ SiO) _m OSiR ³ ₂ H (I)
R ₃ SiO (HRSiO) _n OSiR ₃ (II)
In the general formulas (I) and (II), R is the same or different monovalent hydrocarbon group having no aliphatic unsaturated bond, R ³ is H or R, and m and n are positive integers. R has 1 to 12 carbon atoms, preferably 1 to 10 carbon atoms, and examples thereof include alkyl groups such as a methyl group, an ethyl group, and a propyl group, and aryl groups such as a phenyl group and a tolyl group. It is preferably a group. Moreover, the mass mean molecular weights of (A) component and (B) component are 800-8000, respectively.

  In this embodiment, by adding the component (A) as a cross-linking agent, the silicone film of the release agent layer 12 becomes soft, and even if an adhesive is applied on the release agent layer 12 in-line, glue repelling is not caused. It becomes difficult to occur. Moreover, the adhesiveness with respect to the peeling sheet base material 11 of the releasing agent layer 12 becomes favorable by adding (B) component in addition to (A) component.

  The mass ratio ((A) / (B)) of the component (A) to the component (B) is 1/1 to 100/1, preferably 3/1 to 80/1, more preferably 5/1. ~ 50/1. When the amount of the component (A) is increased, the curing is delayed and the adhesiveness of the release agent to the substrate is decreased. On the other hand, when the amount of the component (A) is too small, the effect of preventing or suppressing the glue repellency may be decreased.

In the release agent composition, the crosslinking agent is such that the number of silicon-bonded hydrogen atoms is 1.0 to 2.0 (molar ratio) with respect to the number of alkenyl groups in the main polymer organopolysiloxane. It is preferable to be added to. When the molar ratio is lower than 1.0, the curability of the composition is lowered. When the molar ratio is higher than 2.0, the peeling force of the release agent becomes heavy, and the peeling performance may be deteriorated. In addition, the molar ratio here is calculated | required from the peak area of the spectrum obtained by analyzing a peeling agent composition by < ¹ > H-NMR.

  As the catalyst, for example, a platinum compound is used. Examples of the platinum compound include fine platinum, fine platinum adsorbed on a carbon powder carrier, chloroplatinic acid, alcohol-modified chloroplatinic acid, and chloroplatinic acid. Examples include olefin complexes, palladium, and rhodium catalysts. About 1 to 1000 ppm of the catalyst is added as a platinum-based metal with respect to the total amount of the addition reaction type organopolysiloxane and the crosslinking agent.

  The viscosity of the release agent composition before curing is preferably 50 to 3000 mPa · s, more preferably 80 to 2500 mPa · s, and particularly preferably 100 to 2000 mPa · s. When the viscosity is lower than the lower limit, the release agent composition is likely to penetrate into the release sheet substrate when paper is used for the release sheet substrate, and when the viscosity is higher than the upper limit, the release agent composition of the release sheet substrate Coating becomes difficult.

The coating amount of the release agent layer 12 is not particularly limited, but is preferably 0.05-5 g / m ^2, and more preferably 0.1 to 3 g / m ^2.

  The pressure-sensitive adhesive sheet substrate 21 has a function of supporting the pressure-sensitive adhesive layer 22. For example, paper such as fine paper, kraft paper, glassine paper, synthetic paper, polyethylene terephthalate film, polybutylene terephthalate film, polyethylene film, polypropylene It is composed of a simple substance or a composite such as a film, a plastic film such as a polymethylpentene film or a polycarbonate film, or a metal foil such as aluminum or stainless steel. The pressure-sensitive adhesive sheet substrate 21 may be subjected to surface treatment for the purpose of improving the adhesion of the printing ink or the pressure-sensitive adhesive layer 22 on the front surface or the back surface thereof.

  The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 22 is not particularly limited as long as it is an emulsion pressure-sensitive adhesive, but an acrylic emulsion pressure-sensitive adhesive is preferably used. When the pressure-sensitive adhesive is composed of an emulsion, it is not necessary to use an organic solvent for both the pressure-sensitive adhesive layer and the release agent layer, so that the environmental burden can be reduced.

  The acrylic emulsion pressure-sensitive adhesive is composed mainly of an acrylic copolymer obtained by copolymerizing a functional group-containing monomer and another monomer such as an acrylic ester or methacrylic ester, and water as a solvent. Contains emulsifiers, thickeners, etc. as appropriate, and further contains stabilizers, tackifiers, fillers, colorants, antioxidants, antistatic agents, ultraviolet absorbers, etc. as necessary. Also good. Examples of the functional group-containing monomer include carboxyl group-containing monomers such as acrylic acid and methacrylic acid. It is preferable that a functional group containing monomer contains 0.3-5.0 mass% on the basis (100 mass%) of the whole monomer which comprises an acrylate-type copolymer.

  The viscosity of the pressure-sensitive adhesive before being applied to the release agent layer 12 is set to a range of 100 to 2000 mPa · s, preferably 150 to 1500 mPa · s, and particularly preferably 200 to 1200 mPa · s. If the viscosity is too low, even when a pressure-sensitive adhesive is applied on the release agent layer 12 having a good silicone formulation, the effect of suppressing glue repellency cannot be sufficiently exhibited, and if it is too high, high-speed coating becomes difficult. .

The coating amount of the adhesive layer 22 is not particularly limited, but is preferably 5 to 60 g / m ^2, and more preferably 10 to 40 g / m ^2.

  In this specification, the viscosity is measured at 25 ° C. in accordance with JIS K7117-1 4.1 (Brookfield rotary viscometer).

Moreover, a mass average molecular weight means what measured each silicone resin by gel permeation chromatography (GPC), and calculated | required it as a polystyrene conversion value. The measurement conditions are as follows.
Measuring device: Shodex GPC SYSTEM-21H (trade name, Showa Denko)
Column: Two Waters, styragel (R) HR5E are used Measurement solvent: Chloroform Measurement temperature: 40 ° C
Flow rate: 1.0 ml / min Sample concentration: 1.0%

¹ H-NMR is analyzed under the following conditions.
Measuring instrument: AVANCE500 (trade name, manufactured by BRUKER BIOSPIN), 500 MHz
Measuring solvent: deuterated chloroform Measuring temperature: 23 ° C

  The present embodiment will be described below using examples, but the present invention is not limited to the configurations of the following examples.

[Example 1]
Organopolysiloxane having vinyl groups at both ends and side chains (containing 5 vinyl groups in one molecule, weight average molecular weight 8000) in 100 parts by mass, as a component (A) of the crosslinking agent, bonded to both ends with silicon atoms 15 parts by mass of hydrogen-containing dimethylpolysiloxane (SiH amount: 1.0 mmol / g, mass average molecular weight: 2000), and three methyl groups are bonded to each of the silicon atoms at both ends as component (B) of the crosslinking agent. 1.0 part by mass of methyl hydrogen polysiloxane (SiH amount: 15 mmol / g, mass average molecular weight: 2000) was added, and further 0.1 part by mass of 3-methyl-1-butyn-3-ol as a reaction inhibitor And 1% by mass of platinum catalyst (trade name: SRX-212, manufactured by Toray Dow Corning Co., Ltd.) were added to the nonvolatile content to obtain a solvent-free release agent composition. The viscosity of the release agent composition was 200 mPa · s, and the number of silicon-bonded hydrogen atoms in the release agent composition was 1.1 (molar ratio) with respect to the number of vinyl groups. Moreover, mass ratio of (A) component / (B) component was 15/1.

Next, a glassine paper having a basis weight of 80 g / m ² is prepared as a release sheet substrate, and the release agent composition is uniformly applied to the substrate using a gravure coater so that the application amount is 1.0 g / m ^2. Then, it was cured by heat treatment at 140 ° C. to obtain a release sheet in which a release agent layer was formed on one surface of the substrate. Subsequently, an acrylic ester copolymer (monomer composition: 49% by mass of 2-ethylhexyl acrylate, 50% by mass of butyl acrylate, 1% by mass of acrylic acid) is continuously contained on the release agent layer of the release sheet. The acrylic emulsion pressure-sensitive adhesive whose viscosity was adjusted to 500 mPa · s was applied at a coating speed of 150 m / min using a gravure coater so that the coating amount after drying was 30 g / m ² .

[Example 2]
The addition amount of the (A) component of the crosslinking agent is 7.5 parts by mass, the addition amount of the (B) component of the crosslinking agent is 1.5 parts by mass, and the mass ratio of (A) component / (B) component Was carried out in the same manner as in Example 1 except that the ratio was 5/1. The viscosity of the release agent composition was 200 mPa · s, and the number of silicon-bonded hydrogen atoms in the release agent composition was 1.1 (molar ratio) with respect to the number of vinyl groups.

[Example 3]
The addition amount of the (A) component of the crosslinking agent is 25 parts by mass, the addition amount of the (B) component of the crosslinking agent is 0.5 part by mass, and the mass ratio of the (A) component / (B) component is 50 parts. This was carried out in the same manner as in Example 1 except that it was set to / 1. The viscosity of the release agent composition was 200 mPa · s, and the number of silicon-bonded hydrogen atoms in the release agent composition was 1.2 (molar ratio) with respect to the number of vinyl groups.

[Example 4]
The same procedure as in Example 2 was performed except that the addition amount of the thickener was adjusted and the viscosity of the adhesive was 200 mPa · s.

[Example 5]
The same procedure as in Example 2 was performed except that the addition amount of the thickener was adjusted and the viscosity of the pressure-sensitive adhesive was 1000 mPa · s.

[Comparative Example 1]
It implemented like Example 1 except not adding (B) component as a crosslinking agent and adding only 30 mass parts of (A) components. At this time, the viscosity of the release agent composition was 200 mPa · s, and the number of silicon-bonded hydrogen atoms in the release agent composition was 1.1 (molar ratio) with respect to the number of vinyl groups.

[Comparative Example 2]
It implemented like Example 1 except not adding (A) component as a crosslinking agent and adding only 2 mass parts of (B) components. At this time, the viscosity of the release agent composition was 200 mPa · s, and the number of silicon-bonded hydrogen atoms in the release agent composition was 1.1 (molar ratio) with respect to the number of vinyl groups.

[Comparative Example 3]
The addition amount of the (A) component of the crosslinking agent is 1 part by mass, the addition amount of the (B) component of the crosslinking agent is 2 parts by mass, and the mass ratio of the (A) component / (B) component is 1/2. The same operation as in Example 1 was carried out except that. The viscosity of the release agent composition was 200 mPa · s, and the number of silicon-bonded hydrogen atoms in the release agent composition was 1.1 (molar ratio) with respect to the number of vinyl groups.

[Evaluation method]
(1) Adhesion evaluation The surface of the release sheet on the release agent layer side was rubbed 10 times with a finger, and the release of the release agent layer was observed. In Table 1, ◯ indicates that the release agent layer did not fall off and adhesion was good. X indicates streaks and / or cloudiness and is unusable.

(2) Evaluation of glue repellency In each example and comparative example, the number of repels generated when the adhesive was applied onto the release agent layer was detected using a defect detector. In this measurement, the number of repels at a width of 1000 mm and a length of 3000 m was measured. An adhesive-uncoated part having a diameter of 1 mm or more was repelled, and if the repelling size was less than 3 mm and the number of repellings was 10 or less, the coating was good and the result was marked as ◯ in Table 1. In the case of 11-30 pieces, it was set as Δ as being usable. In the case of 31 or more, it was marked as x because it was too difficult to use. Moreover, it was set as x also when the size of a repellency was at least 3 mm in diameter.

  As is clear from Table 1, the release agents of Examples 1 to 5 containing the component (A) and the component (B) as the crosslinking agent, and the amount of the component (A) is larger than that of the component (B) are the base materials. Adhesion to was good. In addition, when an adhesive having a viscosity before coating in the range of 100 to 2000 mPa · s is applied on the release agent layer at a high speed continuously after the release agent is applied, almost no adhesive repellency occurs and the coatability is increased. Was good.

  On the other hand, the release agent of Comparative Example 1 containing only the component (A) as a crosslinking agent did not have good adhesion to the substrate. Moreover, in the comparative example 2 which used the release agent containing only (B) component as a crosslinking agent, although the adhesiveness with respect to the base material of a release agent layer is favorable, the applicability | paintability of an adhesive was not favorable. Similarly, even when the component (A) and the component (B) are included, in Comparative Example 3 in which the blending amount of the component (B) is larger than that of the component (A), the coating property is good although the adhesion is good. There wasn't.

It is typical sectional drawing which shows the adhesive sheet which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Adhesive body 11 Release sheet base material 12 Release agent layer 13 Release sheet 21 Adhesive sheet base material 22 Adhesive layer 23 Adhesive sheet

Claims (5)

A pressure-sensitive adhesive sheet provided with a pressure-sensitive adhesive layer on one surface of a pressure-sensitive adhesive sheet base material is brought into contact with a pressure-sensitive adhesive sheet on one surface of the pressure-sensitive adhesive sheet base material, and the pressure-sensitive adhesive layer is in contact with the pressure-sensitive adhesive layer. In the pressure-sensitive adhesive body that is adhered and configured,
The pressure-sensitive adhesive layer is formed by applying an emulsion pressure-sensitive adhesive having a viscosity of 100 to 2000 mPa · s before coating to the release agent layer,
The release agent layer is represented by the following general formula (I) as an organopolysiloxane having alkenyl groups at both ends and side chains in one molecule having a mass average molecular weight of 1000 to 20,000 (A ) And an addition reaction type solventless type release agent composition containing the component and the component (B) represented by the general formula (II) is formed by curing,
The weight average molecular weight of each of the component (A) and the component (B) is 800 to 8000,
The mass ratio of (A) component / (B) component is 1/1 to 100/1,
The said organopolysiloxane is represented by the following general formula (III), The adhesive body characterized by the above-mentioned.
HR ³ ₂ SiO (R ₂ SiO) _m OSiR ³ ₂ H (I)
R ₃ SiO (HRSiO) _n OSiR ₃ (II)
R ¹ R ² ₂ SiO (R ₂ SiO) _p (RR ² SiO) _q SiR ² ₂ R ¹ (III)
(In the general formulas (I) and (II), R is the same or different monovalent hydrocarbon group having no aliphatic unsaturated bond, R ³ is H or R, and m and n are positive integers. .
In the general formula (III), R is the same or different monovalent hydrocarbon having no aliphatic unsaturated bond, R ¹ is an alkenyl group, R ² is R or R ¹ , p and q represent natural numbers, 12 ≦ (p + q) ≦ 270. )   The pressure-sensitive adhesive body according to claim 1, wherein the release agent composition has a viscosity of 50 to 3000 mPa · s.   The pressure-sensitive adhesive body according to claim 1, wherein the emulsion pressure-sensitive adhesive is an acrylic emulsion pressure-sensitive adhesive. After applying a release agent on one surface of the release sheet substrate to form a release agent layer, an adhesive is continuously applied on the release agent layer to form an adhesive layer, and the adhesive In the manufacturing method of the pressure-sensitive adhesive body formed by bonding the pressure-sensitive adhesive sheet base material on the agent layer,
The pressure-sensitive adhesive is an emulsion pressure-sensitive adhesive having a viscosity of 100 to 2000 mPa · s before coating,
The release agent layer is represented by the following general formula (I) as an organopolysiloxane having alkenyl groups at both ends and side chains in one molecule having a mass average molecular weight of 1000 to 20,000 (A ) And an addition reaction type solventless release agent composition containing the component and the component (B) represented by the general formula (II).
The weight average molecular weight of each of the component (A) and the component (B) is 800 to 8000,
The mass ratio of (A) component / (B) component is 1/1 to 100/1,
The said organopolysiloxane is represented by the following general formula (III), The manufacturing method of the adhesive body characterized by the above-mentioned.
HR ³ ₂ SiO (R ₂ SiO) _m OSiR ³ ₂ H (I)
R ₃ SiO (HRSiO) _n OSiR ₃ (II)
R ¹ R ² ₂ SiO (R ₂ SiO) _p (RR ² SiO) _q SiR ² ₂ R ¹ (III)
(In the general formulas (I) and (II), R is the same or different monovalent hydrocarbon group having no aliphatic unsaturated bond, R ³ is H or R, and m and n are positive integers. .
In the general formula (III), R is the same or different monovalent hydrocarbon having no aliphatic unsaturated bond, R ¹ is an alkenyl group, R ² is R or R ¹ , p and q represent natural numbers, 12 ≦ (p + q) ≦ 270. )   The pressure-sensitive adhesive body according to claim 4, wherein the release agent layer and the pressure-sensitive adhesive layer are continuously formed by in-line coating by an in-line type coating apparatus having a plurality of coating heads. Method.

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