JP2014024326A - Electrostatic suction sheet, method for manufacturing the same, and display object using the electrostatic suction sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-side-adhesive sheet enabling sticking displays, atop sticking targets, of display objects of non-sticky printed matters such as signs, posters, advertisements, etc. and scarcely entailing air entrapments between sticking targets and tackifiers when pasted onto the sticking targets.SOLUTION: The electrostatic suction sheet 1 comprises a suction sheet 2 including a resin film layer 5 wherein a tacky layer 7 is configured on one surface thereof and a support material layer 3 including a resin film layer 6, whereas the resin film layer 5 of the suction sheet 2 and the resin film layer 6 of the support material layer 3 are electrostatically suctioned.

Description

The present invention relates to an electrostatic adsorption sheet capable of easily sticking a non-adhesive printed matter such as a sign, a poster, an advertisement or the like to an adherend by electrostatic adsorption, a method for producing the same, and the electrostatic adsorption sheet. Related to the display.
In the electrostatic adsorption sheet of the present invention, since the adsorption sheet (i) constituting the electrostatic adsorption sheet has an electrostatic adsorption capability, the printed material and the adherend can be bonded through this.
The electrostatic adsorption sheet of the present invention can be used for displaying and displaying printed matter for a long period of time, and can be easily peeled off and separated from the adherend after use.

Conventionally, in order to produce a display sheet product with good peelability, a special sheet that has been previously coated with an adhesive with good peelability on one side of the display sheet should be used and displayed on the other side of this sheet. Printed characters and designs are used. Such a special sheet is likely to cause the adhesive to protrude from the end face, so troubles such as adhesion of the adhesive to equipment and other display sheets are likely to occur in the subsequent printing and cutting processes. The efficiency was reduced. Moreover, since the display sheet is previously provided with an adhesive, there is a drawback that printing cannot be performed on the adhesive surface side of the display sheet.
As a technique for solving such a problem, Patent Document 1 and Patent Document 2 disclose a method of displaying a printed non-adhesive printed material using a double-sided pressure-sensitive adhesive sheet having good peelability. .
Although this method has the advantage that printing can be displayed on the adhesive surface, when it is attached to an adherend such as a glass plate, air tends to remain partially between the adherend and the adhesive, There was the fault that the appearance of the printed matter through the body would be poor.

JP 2000-297260 A JP 2001-220560 A

  In view of the drawbacks of the prior art described above, the present invention can display a non-adhesive printed material such as a sign, a poster, an advertisement, etc., as a display object, and can be displayed on the adherend. An object of the present invention is to provide a double-sided adhesive sheet in which air accumulation hardly occurs between an adherend and an adhesive.

  As a result of diligent studies to solve the above problems, the present inventor can provide a double-sided adhesive sheet having desired characteristics by an electrostatic adsorption sheet made of a laminate having a specific structure. As a result, the present invention has been completed.

That is, the present invention is as follows.
(1) An electrostatic adsorption sheet in which an adsorption sheet (i) including a resin film layer (A) provided with an adhesive layer (C) on one side and a support layer (ii) including a resin film layer (B) are laminated. An electrostatic adsorption sheet (iii), wherein the resin film layer (A) of the adsorption sheet (i) and the resin film layer (B) of the support layer (ii) are electrostatically adsorbed.
(2) Adsorption sheet (i) including a resin film layer (A) provided with an adhesive layer (C) on one side;
An electrostatic adsorption sheet in which an adsorption sheet (iv) including a resin film layer (B) provided with an adhesive layer (D) on one side is laminated, the resin film layer (A) of the adsorption sheet (i), and the adsorption sheet The electrostatic adsorption sheet (iii), wherein the resin film layer (B) of (iv) is electrostatically adsorbed.
(3) The electrostatic adsorption sheet (iii) according to (1) or (2), wherein a release sheet layer (E) is further provided on the adhesive layer (C).
(4) The electrostatic adsorption sheet (iii) according to (1) or (2), wherein a printed sheet layer (G) is further provided on the adhesive layer (C).
(5) The electrostatic adsorption sheet (iii) according to any one of (2) to (4), wherein a release sheet layer (F) is further provided on the adhesive layer (D).
(6) The electrostatic adsorption sheet (iii) according to any one of (2) to (4), wherein a printed sheet layer (H) is further provided on the adhesive layer (D).

(7) The electrostatic adsorption sheet (iii) according to any one of (1) to (6), wherein the resin film (A) and the resin film (B) contain a thermoplastic resin.
(8) The electrostatic adsorption sheet (iii) according to (7), wherein the thermoplastic resin includes any one of a polyolefin-based resin, a functional group-containing polyolefin-based resin, a polyamide-based resin, and a thermoplastic polyester-based resin. ).
(9) The surface resistivity of the surface of the resin film (A) on the side in contact with the resin film (B) and the surface of the resin film layer (B) on the side in contact with the resin film (A) are 1 × 10 ^{13 to} 9 respectively. The electrostatic attraction sheet (iii) according to any one of (1) to (8), which is × 10 ¹⁷ Ω.
(10) The electrostatic adsorption sheet according to any one of (1) to (9), wherein the basis weights of the resin film (A) and the resin film (B) are 20 to 500 g / m ² , respectively. (Iii).
(11) The basis weight of the pressure-sensitive adhesive layer (C) is 3 to 60 g / m ² , and the basis weight of the printed sheet layer (G) is 20 to 500 g / m ² (4) to (10 ) The electrostatic adsorption sheet (iii) according to any one of the above.
(12) The basis weight of the pressure-sensitive adhesive layer (D) is 3 to 60 g / m ² , and the basis weight of the printed sheet layer (H) is 20 to 500 g / m ² (6) to (11 ) The electrostatic adsorption sheet (iii) according to any one of the above.
(13) The pressure-sensitive adhesive layer (C) contains any one of an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive. The electrostatic adsorption sheet (iii) as described.
(14) The pressure-sensitive adhesive layer (D) contains any one of an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive. The electrostatic adsorption sheet (iii) as described.

(15) At least one of the resin film layer (A) and the resin film layer (B) is charged, both are laminated by electrostatic adsorption, and then the adhesive layer (C ) Is laminated, The manufacturing method of the electrostatic attraction sheet (iii) according to (1).
(16) The adhesive layer (C) is laminated on one surface of the resin film layer (A), and then at least one of the resin film layer (A) and the resin film layer (B) is charged, The method for producing an electrostatic adsorption sheet (iii) according to (1), wherein lamination is performed by adsorption.
(17) At least one of the resin film layer (A) and the resin film layer (B) is charged, and both are laminated by electrostatic adsorption, and then the pressure-sensitive adhesive layer (C ) Is provided on the surface on the resin film layer (B) side, the pressure-sensitive adhesive layer (D) is provided, The method for producing an electrostatic adsorption sheet (iii) according to (2).
(18) The adhesive layer (C) is laminated on one surface of the resin film layer (A), and the adhesive layer (D) is laminated on one surface of the resin film layer (B), and then the resin film layer (A) and The electrostatic adsorption sheet according to (2), wherein at least one of the resin film layer (B) is charged and the resin film layer (A) and the resin film layer (B) are laminated by electrostatic adsorption. The manufacturing method of (iii).

(19) Display object including the suction sheet (i) formed by peeling the support layer (ii) or the suction sheet (iv) from the electrostatic suction sheet (iii) according to any one of (1) to (14) .
(20) A display object including a suction sheet (iv) formed by peeling the suction sheet (i) from the electrostatic suction sheet (iii) according to any one of (1) to (14).
(21) Display including the suction sheet (i) and the print sheet layer (G), which is formed by peeling the support layer (ii) or the suction sheet (iv) from the electrostatic suction sheet (iii) according to (4) A display object in which the resin film layer (A) side surface is adhered to an adherend by electrostatic adsorption.
(22) The resin film layer (A), the adhesive layer (C), and the adherend are transparent or translucent, and printing on the print sheet layer (G) is visible through the adherend. (21) The display thing characterized by these.

According to the electrostatic adsorption sheet (iii) of the present invention, when a non-adhesive printed material is pasted and displayed on a substrate as a poster, an advertisement or the like, air between the substrate and the printed material is easily removed. And the appearance of the printed matter is not impaired. In addition, the electrostatic adsorption sheet has a high electrostatic adsorption force when used for display, has sufficient sustainability of the electrostatic adsorption force, can be used for display on an adherend for a long time, and is easily peeled off after use. be able to. The electrostatic adsorption sheet is characterized in that the electrostatic adsorption force is hardly affected by humidity.
In addition, when the resin film layer and the adhesive layer in the electrostatic adsorption sheet are transparent or semi-transparent, the information on the printed material such as characters and designs is displayed from the printed material adhered to the adherend. Can be seen through the adsorption sheet and the transparent adherend.
Further, the display object is less likely to cause air accumulation between the adsorbing sheet and the adherend during pasting, and the display position can be easily adjusted after pasting.

It is sectional drawing of the one aspect | mode of the electrostatic adsorption sheet (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is sectional drawing of another one aspect | mode of the electrostatic attraction sheet | seat (iii) of this invention. It is an example of the batch type corona discharge processing apparatus which used the needle-shaped application electrode for the main electrode which can be used for the charging process in the manufacturing method of this invention. It is an example of the batch type corona discharge processing apparatus which used the metal wire-shaped application electrode for the main electrode which can be used for the charging process in the manufacturing method of this invention. It is an example of the continuous corona discharge processing apparatus which used the needle-shaped application electrode for the main electrode which can be used for the charging process in the manufacturing method of this invention. It is an example of the continuous corona discharge processing apparatus which used the metal wire-shaped application electrode for the main electrode which can be used for the charging process in the manufacturing method of this invention. It is an example of the continuous corona discharge processing apparatus which used the needle-shaped application electrode for the main electrode which can be used for the charging process in the manufacturing method of this invention. It is the schematic of the manufacturing apparatus of the electrostatic attraction sheet (iii) used for the Example of this invention. It is the schematic of the one aspect | mode of the display thing of this invention. It is sectional drawing of the one aspect | mode of the display thing of this invention. It is the schematic of another one aspect | mode of the display thing of this invention. It is sectional drawing of another one aspect | mode of the display thing of this invention.

The electrostatic adsorption sheet (iii) of the present invention includes an adsorption sheet (i) including a resin film layer (A) provided with an adhesive layer (C) on one side, and a support layer (ii) including a resin film layer (B). ), And the resin film layer (A) of the adsorption sheet (i) and the resin film layer (B) of the support layer (ii) are electrostatically adsorbed. (See FIG. 1).
The electrostatic adsorption sheet (iii) of the present invention includes an adsorption sheet (i) including a resin film layer (A) provided with an adhesive layer (C) on one side, and a resin film provided with an adhesive layer (D) on one side. An electrostatic adsorption sheet in which an adsorption sheet (iv) including a layer (B) is laminated, wherein the resin film layer (A) of the adsorption sheet (i) and the resin film layer (B) of the adsorption sheet (iv) are static. It is characterized by electroadsorption (see FIG. 9).
The electrostatic adsorption sheet (iii) of the present invention can adhere a non-adhesive printed matter (printing sheet layer (G)) on the adhesive layer (C) and is supported from the electrostatic adsorption sheet (iii). The adsorption sheet (i) formed by peeling off the body layer (ii) can be adsorbed to the adherend by static electricity on the resin film layer (A) side surface.
Hereinafter, each member which comprises the electrostatic attraction sheet | seat (iii) of this invention is demonstrated in detail.

[Adsorption sheet (i)]
The adsorption sheet (i) constituting the electrostatic adsorption sheet (iii) of the present invention includes a resin film layer (A) provided with an adhesive layer (C) on one side.
The adsorption sheet (i) has an electrostatic adsorption capability on the surface of the resin film layer (A) opposite to the adhesive layer (C).
The adsorbing sheet (i) has a non-adhesive printed material or the like bonded to the surface on the adhesive layer (C) side by an adhesive force and an adherend to the surface on the resin film layer (A) side by electrostatic adsorption. By interposing between them, printed matter etc. can be stuck on a to-be-adhered body like what is called a double-sided adhesive sheet. The display object thus obtained can be used as a seal, a label, a sign, a poster, an advertisement, or the like depending on the display content, dimensions, shape, and display method.
The suction sheet (i) can display affixed printed matter or the like on various adherends by electrostatic suction. Also, when using the display, the electrostatic attractive force is high, the electrostatic attractive force is sufficiently durable and the printed matter can be displayed and used for a long period of time. After use, the adhesive sheet (i) can be easily peeled off. It has the feature that it can. Moreover, the electrostatic attraction force has a characteristic that it is hardly affected by humidity. In any case, instead of performing the charging process on the resin film (A), the charging process may be performed on the side of the resin film (B) in contact with the resin film (A).

The adsorption sheet (i) includes a resin film layer (A), which will be described in detail later. The resin film layer (A) is charged, and the adhesive film (C) is applied to the resin film layer (A). It can be obtained by laminating.
In order to make the resin film layer (A) the adsorbing sheet (i), the support layer (ii) including the resin film layer (B) on the treated surface after one surface of the resin film layer (A) is charged. ) And then providing an adhesive layer (C) on the untreated surface of the resin film layer (A). Moreover, after providing the adhesive layer (C) on one side of the resin film layer (A) and providing the release sheet layer (E) or the print sheet layer (G) on the adhesive layer (C), the resin film layer ( This can be achieved by subjecting the other side of A) to a charging treatment.
Alternatively, after one surface of the resin film layer is charged, a support layer (ii) including the resin film layer (B) is laminated on the treated surface, and the adhesive layer is separately formed on one surface of the resin film. (C) is provided, and once the release sheet layer (E) or printed sheet layer (G) is provided on the adhesive layer (C), the respective resin films are joined by a technique such as dry lamination. This can be achieved by using the resin film layer (A).

The resin film layer (A) in the adsorbing sheet (i) preferably has a structure that is easy to perform a charging process and easily retains a charge due to the charging process in order to have an electrostatic adsorption capability.
The ease of applying the charging treatment and the charge holding performance in the resin film layer (A) can be organized by the surface resistivity. The surface resistivity on the surface of the resin film layer (A) on which the adsorption sheet (i) is subjected to charging treatment is preferably in the range of 1 × 10 ^{13 to} 9 × 10 ¹⁷ Ω. The surface resistivity is more preferably in the range of 5 × 10 ^{13 to} 9 × 10 ¹⁶ Ω, and still more preferably in the range of 1 × 10 ^{14 to} 9 × 10 ¹⁵ Ω.
When the surface resistivity is less than 1 × 10 ¹³ Ω, the charge applied during the charging process tends to escape along the surface and the charging process tends to be difficult. In addition, the electric charge once applied to the resin film layer (A) is easy to escape to the outside (in the atmosphere, etc.) through the same surface, and the adsorbing sheet (i) cannot hold the electric charge for a long time, and the electrostatic adsorbing power is reduced. It tends to be easy to do.
On the other hand, if it exceeds 9 × 10 ¹⁷ Ω, there should be no problem in performance, but it is difficult to form such a highly insulating surface using a currently known substance, and it can be realized. However, it is difficult to realize the high cost.
The resin film layer (A) having such a surface resistivity can be achieved by selection of a thermoplastic resin constituting the resin film and presence / absence of surface treatment on the resin film (A).

In the present invention, the adsorption sheet (i) has an untreated surface on the resin film layer (A) side and a surface resistivity in the range of 1 × 10 ^{13 to} 9 × 10 ¹⁷ Ω, and the other surface has antistatic properties. It is preferable to perform a surface treatment to provide antistatic performance. In the processing step of providing an adhesive layer (C) on the surface of the adsorption sheet (i) on the side of the resin film layer (A) by providing the antistatic performance on one side, the resin film layer It is possible to effectively prevent adhesion of dust or the like to (A) and sticking of the resin film layer (A) to the roll, and productivity can be further increased.
As a method for imparting antistatic performance to one side of the adsorption sheet (i), for example, a method of kneading an antistatic agent in the resin film layer (A) or a coat layer (I described later) on one side of the resin film layer (A). ). When the antistatic agent is kneaded into the resin film layer (A), the antistatic effect may not be exhibited unless the corona discharge surface treatment or the frame surface treatment is performed. In particular, the stretched film has a surface treated surface. In some cases, the antistatic effect differs greatly between the untreated surface and the untreated surface. Using this phenomenon, it is possible to form the resin film layer (A) having antistatic performance on one side.

The adsorbing sheet (i) may be transparent or opaque when the adherend is opaque such as a wall or a locker, but the adherend is a glass plate or acrylic. In the case of a transparent plate-like material such as a plate or a polycarbonate plate, higher transparency is suitable. For example, when the printing sheet layer (G) used for display is a double-sided printed product and the suction sheet (i) and the adherend are transparent, printing on the side of the printing sheet layer (G) that contacts the suction sheet (i) The surface can also be visually recognized through the suction sheet (i) and the adherend.
Therefore, the suction sheet (i) in the electrostatic suction sheet (iii) of the present invention is preferably transparent or translucent. That is, it is preferable that the resin film layer (A) and the adhesive layer (C) constituting the adsorption sheet (i) are transparent or translucent. As an index of transparency, the total light transmittance of the adsorbing sheet (i) is preferably 60 to 100%, more preferably 70 to 100%, and particularly preferably 80 to 100%. . If the total light transmittance is 60% or more, the visibility of the image and information of the printed matter is good when the printed pattern is applied to the surface of the suction sheet (i) and the glass plate, acrylic plate or polycarbonate is used. The visibility of the printed material affixed to a transparent adherend such as a plate is good. Such high transparency can be achieved by selecting the resin film layer (A) and the adhesive layer (C) constituting the transparency.

[Resin film layer (A)]
In the present invention, the resin film layer (A) constitutes the adsorbing sheet (i), which is directly charged, or subjected to the charging treatment, the support layer (ii) or the adsorbing sheet (iv). ) Is in contact with the resin film layer (B) to hold the electric charge therein, and electrostatic adsorption of the adsorbing sheet (i) is enabled by the electrostatic charge.
The resin film layer (A) preferably contains a thermoplastic resin. In particular, the use of a thermoplastic resin having an excellent insulating property is preferable because the film layer easily retains charges accumulated therein.
Moreover, the resin film layer (A) may include a coating layer (I) described later on the surface not in contact with the resin film layer (B).

  The kind of the thermoplastic resin that can be used for the resin film layer (A) is not particularly limited as long as it has an insulating property and can retain electric charges therein. Examples of the thermoplastic resin include polyolefin resins such as high density polyethylene, medium density polyethylene, low density polyethylene, propylene resin, and polymethyl-1-pentene; ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer Functional group-containing polyolefin resins such as maleic acid-modified polyethylene and maleic acid-modified polypropylene; polyamide resins such as nylon-6 and nylon-6,6; polyethylene terephthalate and copolymers thereof, polybutylene terephthalate, or polybutylene succin Nate, thermoplastic polyester resins such as aliphatic polyester such as polylactic acid; polycarbonate, atactic polystyrene, syndiotactic polystyrene and the like can be used. These thermoplastic resins can sufficiently ensure transparency. Among these thermoplastic resins, it is more preferable to use any one of a polyolefin-based resin, a functional group-containing polyolefin-based resin, a polyamide-based resin, and a thermoplastic polyester-based resin that are excellent in insulation and processability, and a polyolefin-based resin is used. It is particularly preferred.

More specific examples of polyolefin resins include homopolymers of olefins such as ethylene, propylene, butylene, hexene, octene, butadiene, isoprene, chloroprene, methyl-1-pentene, and two or more of these olefins. The copolymer which can be mentioned can be mentioned.
Furthermore, among these polyolefin resins, propylene resins are preferably used from the viewpoints of insulation, charge retention, processability, mechanical strength, cost, and the like. Examples of the propylene-based resin include isotactic or syndiotactic and polypropylene (propylene homopolymer) having various degrees of stereoregularity, propylene as a main component, ethylene, 1-butene, 1-hexene, It is desirable to use as a main component a propylene-based copolymer obtained by copolymerization with an α-olefin such as 1-heptene or 4-methyl-1-pentene. The propylene-based copolymer may be composed of a binary system mainly containing propylene or may be composed of a ternary system or more, and may be a random copolymer or a block copolymer. The propylene-based resin may be used by blending 2 to 25% by weight of a resin having a lower melting point than that of the propylene homopolymer. Examples of such a resin having a low melting point include high density or low density polyethylene.

  More specific examples of the functional group-containing polyolefin resin include a copolymer of a functional group-containing monomer copolymerizable with the olefin. Examples of such functional group-containing monomers include styrenes such as styrene and α-methylstyrene; vinyl acetate, vinyl propionate, vinyl butyrate, vinyl pivalate, vinyl caproate, vinyl laurate, vinyl stearate, vinyl benzoate, and butyl. Carboxylic acid vinyl esters such as vinyl benzoate and vinyl cyclohexanecarboxylate (or vinyl alcohol obtained by saponifying these carboxylic acid vinyl esters after copolymerization); acrylic acid, methacrylic acid, methyl (meth) acrylate, ethyl ( (Meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate, cyclohex (Meth) acrylic acid esters such as sil (meth) acrylate, isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate; (meth) acrylamide such as (meth) acrylamide and N-metalol (meth) acrylamide; methyl Examples include vinyl ethers such as vinyl ether, ethyl vinyl ether, propyl vinyl ether, butyl vinyl ether, cyclopentyl vinyl ether, cyclohexyl vinyl ether, benzyl vinyl ether, and phenyl vinyl ether. One or two or more of these functional group-containing monomers may be appropriately selected and copolymerized as necessary.

In addition, these polyolefin-based resins and functional group-containing polyolefin-based resins can also be used as necessary in order to adjust their insulation properties and charging voltage.
A known method can be used for graft modification of the resin. Specific examples include graft modification with an unsaturated carboxylic acid or a derivative thereof. Examples of the unsaturated carboxylic acid include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid and the like. Examples of the unsaturated carboxylic acid derivative include acid anhydrides, esters, amides, imides, and metal salts.
Specifically, maleic anhydride, itaconic anhydride, citraconic anhydride, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, glycidyl (meth) acrylate, monoethyl maleate , Maleic acid diethyl ester, fumaric acid monomethyl ester, fumaric acid dimethyl ester, itaconic acid monomethyl ester, itaconic acid diethyl ester, (meth) acrylamide, maleic acid monoamide, maleic acid diamide, maleic acid-N-monoethylamide, maleic acid -N, N-diethylamide, maleic acid-N-monobutylamide, maleic acid-N, N-dibutylamide, fumaric acid monoamide, fumaric acid diamide, fumaric acid-N-monoethylamide, fumaric acid-N, N- Diethylamide, fumaric acid-N-mo Butylamide, fumaric acid -N, N- dibutylamide, maleimide, N- butyl maleimide, N- phenylmaleimide, (meth) sodium acrylate, and (meth) potassium acrylate.

The graft-modified product may be a graft-modified product obtained by graft-modifying the graft monomer with respect to the polyolefin resin and the functional group-containing polyolefin resin, usually 0.005 to 10% by weight, preferably 0.01 to 5% by weight. .
As a thermoplastic resin used for the resin film layer (A), one type may be selected from the above thermoplastic resins and used alone, or two or more types may be selected and used in combination. Good.
Further, the resin film layer (A) may be added with at least one of an inorganic fine powder and an organic filler to such an extent that the transparency of the resin film layer (A) is not impaired. By adding the inorganic fine powder or the organic filler, the dielectric constant of the film can be adjusted, and the thermoplastic resin sheets can be made difficult to stick to each other. Moreover, it becomes easy to form a void | hole inside by the combination with the below-mentioned extending process, and the weight reduction of a resin film layer (A) is attained.

Examples of the inorganic fine powder include calcium carbonate, calcined clay, silica, diatomaceous earth, white clay, talc, titanium oxide, barium sulfate, barium titanate, alumina, zeolite, mica, sericite, bentonite, sepiolite, vermiculite, dolomite. Wollastonite, glass fiber, etc. can be used. When adding an inorganic fine powder, the volume average particle diameter measured by the particle size distribution meter by laser diffraction is usually 0.01 to 15 μm, preferably 0.1 to 5 μm.
When an organic filler is added, it is preferable to select a different type of resin from the thermoplastic resin that is the main component of the resin film layer (A). For example, when the thermoplastic resin is a polyolefin resin, the organic filler may be a polymer such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon-6, nylon-6,6, cyclic polyolefin, polystyrene, polymethacrylate, etc. In addition, an incompatible material having a melting point (for example, 170 to 300 ° C.) or a glass transition temperature (for example, 170 to 280 ° C.) higher than the melting point of the polyolefin resin can be used.

The total amount of the inorganic fine powder or organic filler in the resin film layer (A) is preferably 0 to 3% by weight, more preferably 0 to 1% by weight, intentionally. It is particularly preferred not to add. When the blending amount is 3% by weight or less, the above-mentioned total light transmittance is easily achieved, and the image visibility through the transparent adherend is good.
Furthermore, a heat stabilizer (antioxidant), a light stabilizer, a dispersant, a lubricant, a nucleating agent, and the like can be added to the resin film layer (A) as necessary. When a heat stabilizer is added, it is usually added within a range of 0.001 to 1% by weight. Specifically, sterically hindered phenol-based, phosphorus-based, amine-based stabilizers, and the like can be used. When a light stabilizer is used, it is usually used within a range of 0.001 to 1% by weight. Specifically, a sterically hindered amine-based, benzotriazole-based, or benzophenone-based light stabilizer can be used. A dispersant or a lubricant is used for the purpose of dispersing inorganic fine powder, for example. The amount used is usually in the range of 0.01 to 4% by weight. Specifically, silane coupling agents, higher fatty acids such as oleic acid and stearic acid, metal soaps, polyacrylic acid, polymethacrylic acid or salts thereof can be used.

[Multi-layer]
The resin film layer (A) may have a single layer structure or a two-layer structure or a multilayer structure of three or more layers. The resin film layer (A) can be provided with various functions such as improvement in withstand voltage performance, writing performance, scratch resistance, suitability for secondary processing, etc. by multilayering. When the resin film layer (A) has a multilayer structure, various known methods can be used. Specific examples include a dry laminate method, a wet laminate method and a melt laminate method using various adhesives, Examples thereof include a multilayer die method (coextrusion method) using a feed block and a multi-manifold, an extrusion lamination method using a plurality of dies, and a coating method using various coaters. It is also possible to use a combination of multilayer dies and extrusion lamination.

[Stretching]
The resin film layer (A) preferably includes a stretched resin film stretched in at least one axial direction. The stretched thermoplastic resin film obtained by stretching is a lightweight thin film and has excellent thickness uniformity, so that it is easy to achieve an electrostatic adsorption force that is uniform in the surface direction and free from unevenness due to charging. When the resin film layer (A) has a multilayer structure, the number of stretching axes of each layer constituting the resin film layer (A) is 1 axis / 1 axis, 1 axis / 2 axis, 2 axis / 1 axis, 1 axis / 1 axis / 2 axis, 1 axis / 2 axis / 1 axis, 2 axis / 1 axis / 1 axis, 1 axis / 2 axis / 2 axis, 2 axis / 2 axis / 1 axis, 2 axis / 2 axis / 2 axis, Also good.

  The stretching of the resin film layer (A) can be performed by any one of a variety of commonly used methods or a combination thereof. Specific stretching methods include longitudinal stretching using the difference in peripheral speed of rolls, transverse stretching using a tenter oven, sequential biaxial stretching by a combination of longitudinal stretching and transverse stretching, rolling, combination of a tenter oven and a linear motor. And simultaneous biaxial stretching by combination of a tenter oven and a pantograph. In addition, examples of the method for stretching the inflation film include simultaneous biaxial stretching by a tubular method.

  The draw ratio is not particularly limited, and is appropriately determined in consideration of the properties of the thermoplastic resin used for the resin film layer (A) and the physical properties of the obtained resin film layer (A). For example, when a propylene homopolymer or a copolymer thereof is used as the thermoplastic resin and is stretched in one direction, the draw ratio is usually 1.2 to 12 times, preferably 2 to 10 times. In the case of axial stretching, the area ratio is usually 1.5 to 60 times, preferably 4 to 50 times. When other thermoplastic resins are used and stretched in one direction, the stretch ratio is usually 1.2 to 10 times, preferably 2 to 5 times. In the case of biaxial stretching, the stretch ratio is usually 1 .5 to 20 times, preferably 4 to 12 times.

  The stretching temperature is appropriately determined within a known temperature range suitable for a thermoplastic resin having a temperature not lower than the glass transition point of the thermoplastic resin mainly used for the resin film layer (A) and not higher than the melting point of the crystal part. Specifically, when the thermoplastic resin of the resin film layer (A) is a propylene homopolymer (melting point 155 to 167 ° C.), it is 100 to 166 ° C., and when it is a high density polyethylene (melting point 121 to 136 ° C.) It is 70-135 degreeC, and is 1-70 degreeC temperature lower than melting | fusing point. The stretching speed is preferably 20 to 350 m / min.

If the resin film layer (A) contains the inorganic fine powder or organic filler described above and is stretched, fine pores may be formed inside the film. However, these pores significantly inhibit the light transmittance of the resin film layer (A). Therefore, the porosity calculated by the following formula (1) of the resin film layer (A) is preferably 0 to 10%, and more preferably 0 to 5%. If the porosity exceeds 10%, the light diffusion effect due to the pores causes a decrease in the light transmittance of the resin film layer (A), and it is difficult to obtain a resin film layer (A) having a desirable total light transmittance. Tend to be.
(Ρ ₀ indicates the true density of the resin film layer (A), and ρ indicates the density of the resin film layer (A))
When the resin film layer (A) includes the inorganic fine powder or the organic filler described above and is stretched, the resin film layer (A) is obtained by taking measures such as raising the stretching temperature to near the melting point of the thermoplastic resin. Formation of pores in the film layer (A) can be reduced.

  The resin film layer (A) preferably has a thickness in the range of 20 to 500 μm. The thickness is more preferably in the range of 30 to 400 μm, and particularly preferably in the range of 40 to 300 μm. When the thickness of the resin film layer (A) is less than 20 μm, the mechanical strength of the layer (A) is weakened, and it is easy to apply wrinkles when a printed material is attached or attached to an adherend. The appearance tends to be poor. On the other hand, if the thickness exceeds 500 μm, the electrostatic charge cannot be sufficiently injected into the inside, and the weight of the suction sheet (i) increases, and the weight of the suction sheet cannot be held by the electrostatic suction force, and it is easy to fall from the adherend. .

The resin film layer (A) preferably has a basis weight in the range of ²⁰ to 500 g / m2.該坪amount is more preferably in the range of 30 to 400 g / m ^2, particularly preferably in the range of 40~300g / m ^2. The basis weight of the resin film layer (A) is proportional to the electrostatic charge capacity that can be held inside the layer (A). For this reason, when the basis weight of the resin film layer (A) is less than 20 g / m ² , the electrostatic capacity of the layer (A) becomes small, and the adsorbing sheet (i) easily falls from the adherend. On the other hand, if it exceeds 500 g / m ² , it is sufficient from the viewpoint of electrostatic capacity, but it is difficult to inject sufficient electrostatic charge into the interior, and the weight of the suction sheet (i) becomes large. (I) is likely to fall from the adherend.

[Adhesive layer (C)]
In the present invention, the adhesive layer (C) constitutes the adsorbing sheet (i), and the adhering sheet (i) and the non-adhesive printed matter (printing sheet layer (G)) are joined by the adhesive force. It is possible.
The pressure-sensitive adhesive layer (C) is formed by providing a pressure-sensitive adhesive in a layer form on the surface of the resin film layer (A) that does not contact the resin film layer (B). The type and thickness (coating amount) of the pressure-sensitive adhesive can be variously selected depending on the environment in which the display object is used, the strength of adhesion, and the like.

  As such an adhesive, an acrylic adhesive, a rubber adhesive, a urethane adhesive, a silicone adhesive, or a self-adhesive resin can be used. As specific examples of the acrylic pressure-sensitive adhesive, the glass transition point of 2-ethylhexyl acrylate / n-butyl acrylate copolymer, 2-ethylhexyl acrylate / ethyl acrylate / methyl methacrylate copolymer, or the like is −20 ° C. or lower. Things can be mentioned. Specific examples of rubber-based pressure-sensitive adhesives include polyisobutylene rubber, butyl rubber, and mixtures thereof, or these rubber-based pressure-sensitive adhesives include abietic acid rosin ester, terpene / phenol copolymer, terpene / indene copolymer. The thing which mix | blended tackifiers, such as coalescence, can be mentioned. Specific examples of the urethane pressure-sensitive adhesive include polyester polyols, polyether polyols, polycarbonate polyols, and mixtures of polylactone polyols and isocyanate compounds. Specific examples of silicone-based pressure-sensitive adhesives include a condensation-curing type in which a crosslinking agent is mixed with an organopolysiloxane having a hydroxyl group at the terminal, or an addition-curing type in which a crosslinking agent is mixed with an organopolysiloxane having a vinyl group at the terminal. Can be mentioned. Specific examples of the self-adhesive resin include low density polyethylene, ethylene / vinyl acetate copolymer, ethylene / (meth) acrylic acid copolymer, ethylene / (meth) acrylic acid ester copolymer, soft Polyvinyl chloride can be mentioned. Among these, it is preferable to use an acrylic pressure-sensitive adhesive from the viewpoint of transparency and cost.

These pressure-sensitive adhesives are usually composed of a high molecular weight resin component, and are used in a form dispersed in water such as an organic solvent solution, a dispersion or an emulsion, or in a solventless form. When a solution type such as a solvent type, a dispersion type, or an emulsion type is used for forming the adhesive layer (C) in the present invention, a release sheet layer (described later in detail) directly on the resin film layer (A) E) It is easy to apply and dry solidify. For such coating, a roll coater, blade coater, bar coater, air knife coater, gravure coater, reverse coater, die coater, lip coater, spray coater, comma coater, or the like can be employed. Further, smoothing is performed as necessary, and a pressure-sensitive adhesive layer (C) is formed through a drying step.
In addition, when a solventless type is used for forming the pressure-sensitive adhesive layer (C) in the present invention, the pressure-sensitive adhesive is melted directly on the resin film layer (A) or on the release sheet layer (E) described in detail later. It is easy to form the adhesive by coating it using a gravure coater, die coater or the like, or by extruding a melt-kneaded adhesive using a extruder into a film and cooling and solidifying it.

The pressure-sensitive adhesive layer (C) is formed on the resin film layer (A) by applying a pressure-sensitive adhesive on the release sheet layer (E) to form the pressure-sensitive adhesive layer (C). Although the method of laminating | stacking is common, depending on the case, it can also form by apply | coating an adhesive directly on a resin film layer (A).
The formation of the pressure-sensitive adhesive layer (C) on the resin film layer (A) may be performed before or after the charging process described later in detail on the resin film layer (A).
The basis weight of the adhesive layer (C) (coating amount) is not particularly limited, usually in the range of 3~60g / m ² by solid content, preferably in the range of 10 to 40 g / m ^2.

[Support layer (ii)]
The support layer (ii) constituting the electrostatic adsorption sheet (iii) of the present invention is laminated on one side of the adsorption sheet (i) by the electrostatic adsorption force of the adsorption sheet (i) or its own electrostatic adsorption force. Therefore, when the suction sheet (i) is used, it can be peeled off like the release paper of the pressure-sensitive adhesive label and only the suction sheet (i) can be used as a display object.
The support layer (ii) blocks the discharge of the charge stored in the suction sheet (i) to the outside until the suction sheet (i) is used for display of printed matter, and the like. The electrostatic adsorption sheet (iii) is made easy to handle without causing the electrostatic adsorption force inside the adsorption sheet (i) to appear outside.
The support layer (ii) includes the resin film layer (B), the resin film layer (B) is made of a resin that is a dielectric, and the surface of the resin film layer (B) that contacts the resin film layer (A). However, the resin film layer (A) or the resin film layer (A) can be laminated by its own electrostatic attraction force.

On the other hand, the surface of the support layer (ii) that does not contact the resin film layer (A) preferably has antistatic performance. Since the support layer (ii) has antistatic performance on one side, the electrostatic adsorption sheet (iii) in which the adsorption sheet (i) and the support layer (ii) are laminated exhibits an electrostatic adsorption force to the outside. In addition, troubles such as sticking to the surroundings or sticking between sheets hardly occur during handling such as transportation, storage, and printing of the electrostatic adsorption sheet, and the handling property is good.
Accordingly, the support layer (ii) is peeled in the same manner as the release paper in the pressure-sensitive adhesive label when the adsorption sheet (i) is used as a display object. ), Which facilitates handling such as processing of the electrostatic adsorption sheet.

The support layer (ii) may have a single layer structure or a multilayer structure composed of two or more layers. As described above, the support layer (ii) includes the resin film layer (B), and the surface on the side of the layer (B) is in contact with the resin film layer (A) and can be electrostatically adsorbed. Since it is preferable to configure so as to have antistatic performance, a multilayer structure is preferable.
The support layer (ii) includes a resin film layer (B) that is excellent in insulation from the viewpoint of reducing the movement of charges from the resin film layer (A) on the surface in contact with the resin film layer (A). In the case where the support layer (ii) has a multilayer structure, the other surface is made of paper, synthetic paper, resin films having different compositions, woven fabrics, non-woven fabrics, or antistatic coating layers in consideration of imparting antistatic performance. These known materials can be appropriately selected and laminated.
Further, the surface of the support layer (ii) on the resin film layer (B) side is directly charged to give an electrostatic adsorption force, and the non-treated resin film layer (A ) To form an electrostatic adsorption sheet. In this case, the resin film layer (A) side is dielectricized by the charge of the support layer (ii), and has an electrostatic adsorption force.
The support layer (ii) can be provided with characters and images by printing. Such printing can be performed by conventionally known methods such as offset printing, gravure printing, flexographic printing, letter press printing, screen printing, ink jet printing, thermal recording printing, thermal transfer printing, and electrophotographic printing.

[Resin film layer (B)]
The resin that can be used for the resin film layer (B) constituting the support layer (ii) is a dielectric, and the type thereof is not particularly limited as long as it has an insulating property and can retain electric charges therein. The resin film layer (B) preferably contains a thermoplastic resin. In particular, the use of a thermoplastic resin having an excellent insulating property is preferable because the film layer can easily retain charges accumulated therein.
Therefore, as the resin, polyolefin resins such as high density polyethylene, medium density polyethylene, low density polyethylene, propylene resin, polymethyl-1-pentene, etc. exemplified in the resin film layer (A); Functional group-containing polyolefin resins such as polymers, ethylene / acrylic acid copolymers, maleic acid-modified polyethylene, maleic acid-modified polypropylene; polyamide resins such as nylon-6 and nylon-6,6; polyethylene terephthalate and copolymers thereof , Thermoplastic polyester resins containing aliphatic polyester such as polybutylene terephthalate, polybutylene succinate and polylactic acid; in addition to thermoplastic resins such as polycarbonate, atactic polystyrene and syndiotactic polystyrene, phenol Fat, melamine resins, urea resins, urethane resins, epoxy resins, and thermosetting resins such as unsaturated polyester resin.
Among these, it is preferable to use a thermoplastic resin excellent in processability, and it is more preferable to use any one of a polyolefin resin, a functional group-containing polyolefin resin, a polyamide resin, and a thermoplastic polyester resin, and a polyolefin resin. It is particularly preferable to use
Moreover, the resin film layer (B) may contain the below-mentioned coat layer (J) in the surface which does not contact the resin film layer (A).

The resin film (B) in the support layer (ii) plays a role of sealing so that the charge of the resin film layer (A) in the adsorption sheet (i) does not escape to the outside. The ability to contain this charge can be organized by the dielectric constant. The relative dielectric constant of the resin film layer (B) is preferably 1.1 to 5.0, more preferably 1.2 to 4.0, and still more preferably 1.5 to 3.0. When the relative dielectric constant of the resin film layer (B) exceeds 5.0, the resin film layer (A) cannot hold the charge for a long time, and the electrostatic adsorption force of the adsorption sheet (i) tends to be reduced. There is. On the other hand, if the relative dielectric constant is less than 1.1, there should be no problem in terms of performance. However, since it is lower than the relative dielectric constant of air (vacuum), such materials are difficult to obtain in the current technology. is there.
Such a relative dielectric constant can be achieved in a desired range by the resin film layer (B) being composed of the above-mentioned resin, or by forming a void inside.

The surface of the support layer (ii) on the side of the resin film layer (B) is preferably as high as possible in the same manner as the resin film layer (A) from the viewpoint of reducing charge transfer. Specifically, the surface resistivity of the surface of the support layer (ii) on the resin film layer (B) side is preferably in the range of 1 × 10 ^{13 to} 9 × 10 ¹⁷ Ω. The surface resistivity is more preferably in the range of 5 × 10 ^{13 to} 9 × 10 ¹⁶ Ω, and still more preferably in the range of 1 × 10 ^{14 to} 9 × 10 ¹⁵ Ω. When the surface resistivity is less than 1 × 10 ¹³ Ω, the charge of the resin film layer (A) easily escapes to the outside through the surface, and the resin film layer (A) cannot hold the charge for a long time, There is a tendency that the electrostatic attraction force of the suction sheet (i) tends to decrease. On the other hand, if it exceeds 9 × 10 ¹⁷ Ω, there should be no problem in performance, but it is difficult to form such a highly insulating surface using a currently known substance, and it can be realized. However, it is difficult to realize the high cost.

On the other hand, it is preferable that the support layer (ii) has an antistatic performance on one side (a surface not in contact with the resin film layer (A)) for the purpose of improving the handling property when the electrostatic adsorption sheet (iii) is obtained. . The antistatic property is imparted to the support layer (ii) by using a resin film in which an antistatic agent is kneaded into the resin film layer (B) constituting the support layer (ii) or a coating layer described later. (J), a method of providing a conductive layer by applying a conductive paint, a method of forming a metal thin film by direct vapor deposition, transfer vapor deposition, lamination of vapor deposited film, antistatic treated paper, synthetic paper, etc. And a method of laminating and laminating a resin film, a woven fabric, a nonwoven fabric, and a resin film kneaded with an antistatic agent.
In an embodiment in which a resin film layer kneaded with an antistatic agent is provided, an antistatic effect may not be manifested unless corona discharge surface treatment or frame surface treatment is performed on the film surface, particularly with a stretched film. The antistatic effect may differ greatly between the surface and the untreated surface. Using this phenomenon, a thermoplastic resin kneaded with an antistatic agent is used as a resin film layer (B), and surface treatment such as corona discharge is performed on one side of the resin film layer (B). It is also possible to form a support layer (ii) having antistatic properties.

By the various methods described above, antistatic performance is imparted to the surface of the support layer (ii) that does not contact the resin film layer (A), that is, the surface that comes to the outer layer of the electrostatic adsorption sheet (iii), and its surface resistivity Is preferably in the range of 1 × 10 ^{−1 to} 9 × 10 ¹² Ω. The surface resistivity is more preferably in the range of 1 × 10 ^{0 to} 9 × 10 ¹² Ω. If the surface resistivity of the surface of the support layer (ii) that is not in contact with the resin film layer (A) exceeds 9 × 10 ¹² Ω, the antistatic performance is not sufficient, and it is stuck to the periphery of the electrostatic adsorption sheet. Troubles such as sticking and sticking between sheets are likely to occur, and the handleability is inferior, and the desired performance of the present invention tends to be difficult to obtain. On the other hand, when the surface resistivity is less than 1 × 10 ⁻¹ Ω, there should be no problem in terms of performance as an electrostatic adsorption sheet, but such a highly conductive surface is formed using a currently known substance. This is difficult, and even if it can be realized, it is difficult to realize it because of its high cost.

The resin film layer (B) preferably has a basis weight in the range of ²⁰ to 500 g / m2.該坪amount is more preferably in the range of 30 to 400 g / m ^2, particularly preferably in the range of 40~300g / m ^2. The basis weight of the resin film layer (B) is proportional to the capacity of electrostatic charge that can be held inside the layer (B). For this reason, when the basis weight of the resin film layer (B) is less than 20 g / m ² , the electrostatic capacity of the layer (B) also decreases, and the adsorbing sheet (ii) easily falls from the adherend. On the other hand, if it exceeds 500 g / m ² , it is sufficient from the viewpoint of capacitance, but it is difficult to inject electrostatic charges sufficiently into the inside, and the weight of the suction sheet (ii) becomes large. (Ii) is likely to fall from the adherend.

[Adsorption sheet (iv)]
The electrostatic adsorption sheet (iii) of the present invention may be a laminate of the adsorption sheet (i) and the adsorption sheet (iv) by electrostatic adsorption. At this time, the adsorption sheet (iv) includes the resin film layer (B) similarly to the support layer (ii), but on one side of the resin film layer (B) (the surface not in contact with the resin film layer (A)). An adhesive layer (D) is provided. Therefore, the electrostatic adsorption sheet in the same state includes a laminated structure of (adhesive layer (C) / resin film layer (A) / resin film layer (B) / adhesive layer (D)) (see FIG. 9). .
The electrostatic adsorbing sheet in the same state is bonded with non-adhesive printed matter (printing sheet layer (G) and printing sheet layer (H)) by the pressure-sensitive adhesive layer (C) and pressure-sensitive adhesive layer (D) on both sides. Can be attached. Then, it peels between the resin film layer (A) and the resin film layer (B) which are electrostatically adsorbed, and with the adsorption sheet (i) with the printing sheet layer (G) and the printing sheet layer (H) If the suction sheets (iv) are used as display objects, two display objects can be obtained from one electrostatic adsorption sheet (iii). According to the similar aspect, in the above example, the support layer (ii) can be effectively used after it has been removed as a pressure-sensitive adhesive label release paper during use of the adsorbent sheet (i). . Moreover, according to the same aspect, since two display objects are obtained with one electrostatic adsorption sheet, effects such as transportation cost reduction can be obtained.

[Adhesive layer (D)]
In the present invention, the pressure-sensitive adhesive layer (D) constitutes the adsorbing sheet (iv), and the resin film layer (B) and the non-adhesive printed matter (printing sheet layer (H)) are formed by the adhesive force. It is what is joined.
The pressure-sensitive adhesive layer (D) is formed by providing a pressure-sensitive adhesive layered on the surface of the resin film layer (B) that does not contact the resin film layer (A), or a layered pressure-sensitive adhesive on one surface of the resin film layer (B). It is formed by providing. The type and thickness (coating amount) of the pressure-sensitive adhesive can be variously selected depending on the environment in which the display object is used, the strength of adhesion, and the like.
As this pressure-sensitive adhesive, those having the same composition as the pressure-sensitive adhesive described in the pressure-sensitive adhesive layer (C) can be provided by the same method and used with the same basis weight (coating amount). The kind of adhesive used in the adhesive layer (D), the lamination method, and the basis weight (coating amount) may be the same as or different from those of the adhesive layer (C).

[Coat layer (I)]
The resin film layer (A) constituting the electrostatic adsorption sheet (iii) of the present invention is provided with a coating layer (I) for the purpose of imparting antistatic performance to the surface not in contact with the resin film layer (B). Is preferred. In this case, the adhesive layer (C) of the adsorption sheet (i) is provided on the coat layer (I) (see FIG. 5).
For example, a resin film layer (A) provided with a coating layer (I) on one side, a resin film layer (A) side surface is charged, and then a coating layer (J) is provided on one side Bonding with the surface of the film layer (B) on the side of the resin film layer (B), a laminate of both is produced by electrostatic adsorption, and then the adhesive layer ( By laminating C), the electrostatically adsorbing sheet (iii) of the present invention can be obtained. However, since both surfaces of the laminate have antistatic properties and the internal charge does not appear outside, The sticking layer (C) is less likely to cause troubles such as sticking to equipment in the laminating process, and is very easy to handle.
The coat layer (I) is used for imparting antistatic performance to the resin film layer (A). The coating layer (I) preferably contains 0.1 to 100% by weight of an antistatic agent, 0 to 99.9% by weight of a polymer binder, and 0 to 70% by weight of pigment particles as its composition. The coating layer (I) is applied directly on the resin film layer (A) as a coating agent containing these components, or is coated in advance on another film to form the coating layer (I). It can be provided by laminating it on the resin film layer (A).

  The antistatic agent is added to impart antistatic performance to the coating layer (I). Specifically, low molecular weight organic compound antistatic agents represented by stearic acid monoglyceride, alkyldiethanolamine, sorbitan monolaurate, alkylbenzene sulfonate, alkyldiphenyl ether sulfonate, etc .; ITO (indium doped tin oxide) , Conductive inorganic fillers typified by ATO (antimony-doped tin oxide), graphite whiskers, and the like; so-called electron conductive polymers that exhibit conductivity by conjugated electrons in molecular chains such as polythiophene, polypyrrole, polyaniline; and polyethylene Nonionic polymer antistatic agents such as glycol and polyoxyethylenediamine; quaternary ammonia such as polyvinylbenzyltrimethylammonium chloride and polydimethylaminoethyl methacrylate quaternized compounds Um salt copolymer, and alkylene oxide group and / or a polymer having an antistatic function typified by alkali metal salts containing polymers such as alkali metal ions additives to hydroxyl group-containing polymers can be exemplified.

Each of these antistatic agents has characteristics. For example, a low molecular weight organic compound-based antistatic agent is characterized in that the antistatic performance is easily influenced by the environmental humidity and tends to bleed out to the outermost surface. The electrostatic adsorption force of the resin film layer (A) may be reduced by bleeding out of the antistatic agent. In addition, the antistatic agent that bleeds out may be transferred to the surface of the other film to develop antistatic performance, and as a result, the resin film layer (A) having a stable electrostatic adsorption force may not be obtained.
When the conductive inorganic filler is added in a small amount, the fillers do not come into contact with each other, so that the antistatic effect may not be sufficiently obtained. In addition, when the conductive inorganic filler is added in such an amount that the fillers are in contact with each other, the amount of the binder is remarkably reduced, so that the cohesive force of the coat layer (I) is reduced and adhesion to the resin film layer (A) is achieved. In some cases, the force may decrease or the interlayer strength of the suction sheet (i) may decrease.

Electronically conductive polymers generally have black, green, or blue-gray coloration due to the coloration derived from the conjugated system. If this is used, an excellent antistatic effect can be obtained, but the resin film layer has a dull color. (A), and the transparency may be lowered, and may not be suitable for posting printed matter.
A polymer having an antistatic function has a stable antistatic performance, and on the other hand, has low transferability to the surface of the film and little coloration. Therefore, the coating layer (I) used in the electrostatic adsorption sheet (iii) of the present invention ) Is preferable as an antistatic agent. Among them, a quaternary ammonium salt copolymer and an alkali metal salt-containing polymer are more preferable because they have good antistatic performance and little influence of environmental humidity on the antistatic performance.
The coat layer (I) may contain a polymer binder as necessary. The polymer binder can give good adhesion between the coat layer (I) and the resin film layer (A) on which the polymer binder is cohesive.

  Specific examples of the polymer binder include polyethyleneimine, alkyl-modified polyethyleneimine having 1 to 12 carbon atoms, poly (ethyleneimine-urea), an ethyleneimine adduct of poly (ethyleneimine-urea), polyamine polyamide, and polyamine polyamide. Polyethyleneimine polymer such as ethyleneimine adduct and epichlorohydrin adduct of polyamine polyamide; acrylate copolymer, methacrylic acid ester copolymer, acrylic acid amide-acrylic acid ester copolymer, acrylic acid amide-acrylic acid Acrylate ester-based polymers such as ester-methacrylic acid ester copolymers, polyacrylamide derivatives, and oxazoline group-containing acrylic ester polymers; polyvinylpyrrolidone, polyethylene glycol, etc. Vinyl acetate resin, urethane resin, polyether resin, polyester resin, urea resin, terpene resin, petroleum resin, ethylene-vinyl acetate copolymer, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, vinylidene chloride resin, chloride Vinyl-vinylidene chloride copolymer resin, chlorinated ethylene resin, chlorinated propylene resin, butyral resin, silicone resin, nitrocellulose resin, styrene-acrylic copolymer resin, styrene-butadiene copolymer resin, acrylonitrile-butadiene copolymer A polymer etc. can be mentioned.

Any one of these polymer binders may be used alone, or two or more thereof may be mixed and used. These polymer binders can be used in a state diluted or dispersed in an organic solvent or water. Among these, urethane resins such as polyethyleneimine polymers, polyether urethanes, polyester polyurethanes and acrylic urethanes, or acrylic acid ester copolymers have good compatibility (compatibility) with the above-mentioned polymers having an antistatic function. It is stable when mixed and used as a paint, and is preferable because it is easy to apply.
The coat layer (I) may or may not contain pigment particles. It is possible to improve performance such as blocking prevention by imparting irregularities on the surface of the coat layer (I) formed by adding pigment particles to the coat layer (I), and to impart performance such as light resistance and weather resistance as an ultraviolet reflector. . The pigment particles are appropriately selected in consideration of these required performances, and are added as necessary.

As the pigment particles, known organic or inorganic fine particles can be used. As specific examples, silicon oxide, calcium carbonate, calcined clay, titanium oxide, zinc oxide, barium sulfate, diatomaceous earth, acrylic particles, styrene particles, polyethylene particles, polypropylene particles, and the like can be used. The particle diameter of the pigment particles is preferably 20 μm or less, more preferably 15 μm or less, and further preferably 3 μm or less. When the particle diameter of the pigment particles exceeds 20 μm, the pigment particles easily fall off from the formed coating layer (I), and a powder blowing phenomenon occurs. The pigment particle content in the coat layer (I) is preferably 0 to 70% by weight, more preferably 0 to 60% by weight, and still more preferably 0 to 50% by weight. When the content of the pigment particles exceeds 70% by weight, the amount of the binder resin is relatively insufficient, and the cohesive strength of the coat layer (I) is insufficient, and the resin film layer (A) or the resin film layer (B) Adhesive strength to the adhesive layer decreases, and the pressure-sensitive adhesive layer (C) or the pressure-sensitive adhesive layer (F) and the non-sticky printed matter (printed sheet layer (G)) tend to be peeled off from the film layer.

The coating layer (I) can be provided as a coating layer by preparing a coating solution containing the above components, coating the resin layer (A), drying and solidifying the coating layer. For coating, a conventionally known method or apparatus can be used.
The coat layer (I) can be provided on the resin film layer (A) by lamination. In this case, another film provided with a coat layer (I) in advance is prepared and laminated on the resin film layer (A). Lamination can be performed by a technique such as ordinary dry lamination or melt lamination.
The coating layer (I) is preferably placed on the resin film layer (A) before carrying out the charging process described later. The antistatic performance of the coat layer (I) makes it possible to suppress the electrostatic attraction force to the outside of the electrostatic attraction sheet (iii) even after the charging process.

The coat layer (I) imparts antistatic performance to one side of the resin film layer (A). Specifically, the surface resistivity of the coat layer (I) surface is 1 × 10 ^{−1 to} 9 × 10 ¹² Ω, preferably 1 × 10 ^{3 to} 9 × 10 ¹¹ Ω, and more preferably 1 × 10 ^{6 to} 9. Adjust within the range of × 10 ¹⁰ Ω.
If the surface resistivity of the coating layer (I) exceeds 9 × 10 ¹² Ω, electrostatic adsorption laminates and electrostatic adsorption sheets cannot sufficiently suppress the electrostatic adsorption force, There is a tendency that troubles such as sticking to a roll or sticking between sheets tend to occur during the pasting process, and troubles such as sticking between electrostatic adsorption sheets tend to occur. On the other hand, it is technically difficult to form a coating layer (I) having a high conductivity such that the surface resistivity is less than 1 × 10 ⁻¹ Ω. Even if it can be formed, the resin film layer (A) The total light transmittance may be low, and the visibility of the printed pattern attached to the resin film layer (A) may be inferior. Moreover, the electrostatic attraction force of the resin film layer (A) may be impaired.

The basis weight (coating amount) of the coat layer (I) is preferably 0.01 to 50 g / m ² , more preferably 0.05 to 30 g / m ² in terms of solid content, and more preferably from 1 to 10 g / m ^2, and particularly preferably 0.3~8g / m ^2. When the basis weight is less than 0.01 g / m ² , it is difficult to maintain the uniformity of the coat layer (I), and stable antistatic performance may not be obtained. On the other hand, when it exceeds 50 g / m ² , if it is provided on the resin film layer (A), the electrostatic adsorption force and light transmittance of the resin film layer (A) tend to be impaired, and the resin film layer ( A) becomes heavier and tends to peel off because its electrostatic adsorption force cannot support its own weight, and the electrostatic adsorption force between the resin film layer (A) and the support layer (ii) decreases. May be easier.
It is possible to provide characters and images on the coat layer (I) by printing. Examples of such printing include conventionally known methods such as offset printing, gravure printing, flexographic printing, letter press printing, screen printing, ink jet printing, thermal recording printing, thermal transfer printing, and electrophotographic printing.

[Coat layer (J)]
The resin film layer (B) constituting the electrostatic adsorption sheet (iii) of the present invention is preferably provided with a coat layer (J) for the purpose of imparting antistatic performance to one surface thereof. In this case, the adhesive layer (D) of the adsorption sheet (iv) is provided on the coat layer (J).
As such a coat layer (J), the same composition as described in the above-mentioned coat layer (I) can be provided by the same method and used in the same thickness. The composition, lamination method, and basis weight (coating amount) used in the coat layer (J) may be the same as or different from those of the coat layer (I).
The coat layer (J) can be provided with characters and images by printing. Examples of such printing include conventionally known methods such as offset printing, gravure printing, flexographic printing, letter press printing, screen printing, ink jet printing, thermal recording printing, thermal transfer printing, and electrophotographic printing.

[Peeling sheet layer (E)]
In the electrostatic adsorption sheet (iii) of the present invention, a release sheet layer (E) may be further provided on the surface of the pressure-sensitive adhesive layer (C) (see FIG. 2). Until the release sheet layer (E) is provided with a printing sheet layer (G) described later on the adhesive layer (C), the adhesive layer (C) It is provided to protect C). Therefore, when the printed sheet layer (G) is provided on the pressure-sensitive adhesive layer (C), it is peeled off and removed like a normal pressure-sensitive adhesive label release paper.
As the release sheet layer (E), a general release paper can be used. For example, high-quality paper or kraft paper as it is, or those that have been calendered, those coated with resin, those laminated with a plastic film, coated paper, glassine paper, plastic film, etc. with silicone treatment or A fluorine-treated one can be used.
More specifically, a plastic film such as polyethylene resin such as polyethylene or polypropylene, polyester resin such as polyethylene terephthalate, or polyamide resin such as nylon is laminated on one or both sides of natural pulp paper such as fine paper or kraft paper. Those obtained by applying silicone treatment to these, or those obtained by applying silicone treatment to plastic films such as polyolefin resins such as polyethylene and polypropylene, and polyester resins such as polyethylene terephthalate can be used.

[Peeling sheet layer (F)]
When the electrostatic adsorption sheet (iii) of the present invention has an adhesive layer (D), a release sheet layer (F) may be further provided on the surface of the adhesive layer (D) (see FIG. 9). The release sheet layer (F) is a pressure-sensitive adhesive layer (D) so that the adhesive force of the pressure-sensitive adhesive layer (D) does not appear outside until a printing sheet layer (H) described later is provided on the pressure-sensitive adhesive layer (D). It is provided to protect D). Therefore, when the printed sheet layer (H) is provided on the pressure-sensitive adhesive layer (D), it is peeled off and removed like a normal pressure-sensitive adhesive label release paper.
As the release sheet layer (F), the same as described in the release sheet layer (E) can be used. The release sheet layer (F) used for the electrostatic attraction sheet (iii) of the present invention may be the same as or different from the release sheet layer (E).

[Printing sheet layer (G)]
The electrostatic adsorption sheet (iii) of the present invention may further be provided with a printing sheet layer (G) on the surface of the pressure-sensitive adhesive layer (C) (see FIG. 3). The printing sheet layer (G) here is a non-adhesive printed matter.
A laminate comprising the printed sheet layer (G) and the adsorbing sheet (i) obtained by peeling the support layer (ii) or the adsorbing sheet (iv) from the electrostatic adsorbing sheet (iii) provided with the printed sheet layer (G) It can be attached to an adherend as a display object.
As the printing sheet layer (G), various general materials that are usually available as printed materials can be used. For example, offset printing on one or both sides of plastic film such as natural pulp paper such as fine paper and kraft paper, synthetic paper, polyolefin resin such as polyethylene and polypropylene, polyester resin such as polyethylene terephthalate, polyamide resin such as nylon And prints that have been printed by conventionally known methods such as gravure printing, flexographic printing, letter press printing, screen printing, ink jet printing, thermal recording printing, thermal transfer printing, and electrophotographic printing.

[Printing sheet layer (H)]
When the electrostatic adsorption sheet (iii) of the present invention has an adhesive layer (D), a printed sheet layer (H) may be further provided on the surface of the adhesive layer (D) (see FIG. 11). The printing sheet layer (H) here is also a non-sticky printed matter.
A laminate including the print sheet layer (H) and the suction sheet (iv), which is obtained by peeling the suction sheet (i) from the electrostatic suction sheet (iii) provided with the print sheet layer (H), is an adherend as a display object. Can be attached to.
As the print sheet layer (H), the same print sheet layer (G) as described above can be used. The printing sheet layer (H) used for the electrostatic adsorption sheet (iii) of the present invention may be the same as or different from the printing sheet layer (G).
The basis weights of the printing sheet layer (G) and the printing sheet layer (H) are each preferably in the range of ^{20 to} 500 g / m ² .該坪amount is more preferably in the range of 30 to 400 g / m ^2, particularly preferably in the range of 40~300g / m ^2. If the basis weight of the printed sheet layer (G) and the printed sheet layer (H) exceeds 500 g / m ² , the weight of the printed sheet layer (G) becomes too large to be held by the electrostatic adsorption force of the suction sheet (i). There is a tendency to fall easily. On the other hand, if it is less than 20 g / m ² , the printed sheet layer (G) and the printed sheet layer (H) are low in elasticity, so that the operation of bonding to the adsorption sheet (i) tends to be difficult.

[Charging treatment]
The electrostatic adsorption sheet (iii) of the present invention is provided on at least one of the resin film layer (A) surface of the adsorption sheet (i) and the resin film layer (B) surface of the support layer (ii) or the adsorption sheet (iv). A charging process is performed, and then both are bonded together by an electrostatic adsorption force to form a laminate of (A) / (B).
The charging process is performed to inject an electric charge into the resin film layer (A) or the resin film layer (B) so as to have an electrostatic adsorption force.
The charging process can be performed according to various known methods. As a processing method, for example, after forming the film, a method of applying corona discharge or pulsed high voltage to the surface of the film (electroelectretization method), or holding both surfaces of the film with a dielectric, Examples thereof include a method of applying a DC high voltage (electro-electretization method) and a method of irradiating the film with ionizing radiation such as γ rays and electron beams (radio-electretization method).
The film is preferably charged by the above corona discharge or a method of applying a high voltage (electroelectretization method). As a preferable example of the electroelectretization method, a method of applying a voltage by fixing a film between an application electrode connected to a DC high-voltage power source and a ground electrode (batch type, see FIGS. 15 and 16), or letting the film pass. And applying voltage (continuous, see FIGS. 17, 18 and 19). When this method is used, a main electrode (applied electrode) with many needles arranged at equal intervals, a metal wire, and a flat metal plate or metal roll on the counter electrode (earth electrode) It is desirable to use it.

When the coating layer (I) is provided on one side of the resin film layer (A) or when the coating layer (J) is provided on one side of the resin film layer (B), corona discharge to the surface of the coating layer Such charging treatment is not effective because the applied charge is likely to dissipate to the surroundings. However, a method in which the surface having the antistatic performance is brought into contact with the ground side (metal plate or metal roll) to perform the charging treatment is preferable because charges can be stably injected.
The resin film layer (A) or the resin film layer (B) constituting the electrostatic adsorption sheet (iii) of the present invention can be subjected to a charge removal process after the charging process. By performing the neutralization process, it is possible to remove excessive charges and avoid troubles in processing steps such as a cutting step and a printing step. A known technique such as a voltage application type static eliminator (ionizer) or a self-discharge type static eliminator can be used for the static elimination treatment. These general static eliminators can remove charges on the surface, but cannot remove charges accumulated in the resin film layer (A) or the resin film layer (B). Therefore, the electrostatic adsorption force of the resin film layer (A) or the resin film layer (B) is not significantly impaired by the charge removal treatment.
Electrostatic adsorption sheet (iii) obtained by laminating resin film layer (B) of support (ii) or adsorption sheet (iv) by charge injection into resin film layer (A) of adsorption sheet (i); In the electrostatic adsorption sheet (iii) obtained by laminating the resin film layer (A) of the adsorption sheet (i) by injecting charges into the resin film layer (B) of the support (ii) or the adsorption sheet (iv) The two cannot be distinguished from each other, and when the electrostatic adsorption sheet (iii) is separated and separated into the adsorption sheet (i) and the support (ii) or the adsorption sheet (iv), the adsorption sheet (i) It is impossible to distinguish whether the charge is injected into the resin film layer (A) or the resin film layer (B) of the support (ii) or the adsorption sheet (iv). Either method can be used to obtain an electrostatic adsorption sheet (iii) with equivalent performance.

[Displayed items]
The adsorption sheet (i) formed by peeling the support layer (ii) from the electrostatic adsorption sheet (iii) of the present invention is obtained by adhering the printing sheet layer (G) to the surface of the adhesive layer (C). It can be used as a display object such as a seal, a label, a sign, a poster, and an advertisement. Since this display can attach the resin film layer (A) side surface to the adherend by electrostatic adsorption without using an adhesive or the like, even if an air pocket occurs between the display and the adherend. If it is handled by hand, it is easy to remove air from any direction, and there is an advantage that air accumulation hardly occurs as a final finish. In addition, the display object has a high electrostatic attraction force when used, and the electrostatic attraction force is sufficiently durable and can be displayed on the adherend for a long period of time. Things can be separated.
Similarly, the adsorbing sheet (iv) obtained by peeling the adsorbing sheet (i) from the electrostatic adsorbing sheet (iii) according to the present invention attaches the printed sheet layer (H) to the surface of the adhesive layer (D). It can be used as a display object. Similarly, this display can be adhered to the adherend by electrostatic adsorption without using an adhesive or the like on the surface of the resin film layer (B), and the advantage is that air accumulation hardly occurs as a final finish. There is. In addition, the display object has a high electrostatic attraction force when used, and the electrostatic attraction force is sufficiently durable and can be displayed on the adherend for a long period of time. Things can be separated.

  Examples of display items include POPs (posters, stickers, displays, etc.), labels, names, store information (pamphlets, company information, product writing, menus, etc.), underlays (lunch mats, table mats, stationery supplies, etc.), manuals ( Various manuals such as duties, work, operations, schedules, timetables, etc.), charts (nautical charts, weather charts, charts, ruled line charts, etc.), catalogs, maps (nautical charts, route maps, outdoor maps, etc.), store price lists , Mountain climbing guides, cooking recipes, information boards (sales guidance, direction / destination guidance, etc.), schedules, road signs (funerals / housing exhibition places, etc.), room name tags, school records, display boards (no entry, forest road work) Etc.), division piles, nameplates, calendars (with images), mouse pads, packaging materials (wrapping paper, boxes, bags, etc.), coasters, etc. Possible it is. In particular, it can be suitably used for applications premised on indoor use.

Below, this invention is demonstrated further more concretely using a preparation example, a manufacture example, an Example, a comparative example, and a test example. The materials, amounts used, ratios, operations, and the like shown below can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.
Table 1 summarizes the thermoplastic resin compositions used in the production examples of the resin film layer (A) and the resin film layer (B) of the present invention. These were prepared by melt-kneading resin compositions (a) to (f) in which the raw materials described in Table 1 were mixed in the proportions described in Table 1 in a biaxial kneader set at 210 ° C., and then 230 ° C. Extruded in the form of a strand with an extruder set to 1, and cut with a strand cutter after cooling to prepare pellets of the resin compositions (a) to (f), which were used in the subsequent production examples.

[Preparation Example 1 of polymer having antistatic function]
100 parts by weight of polyethylene glycol monomethacrylate (Nippon Yushi Co., Ltd., trade name: BLEMMER PE-350), 20 parts by weight of lithium perchlorate (manufactured by Wako Pure Chemical Industries, Ltd., reagent), hydroquinone (Wako Pure Chemical Industries, Ltd.) 1 part by weight, manufactured by Co., Ltd. and 400 parts by weight of propylene glycol monoethyl ether (manufactured by Wako Pure Chemical Industries, Ltd., reagent), stirring apparatus, reflux condenser (condenser), thermometer, and dropping funnel Introduce into the fitted four-necked flask,
The system was purged with nitrogen and reacted at 60 ° C. for 40 hours. Stearyl methacrylate (Wako Pure Chemical Industries, Ltd., reagent) 5 parts by weight, n-butyl methacrylate (Wako Pure Chemical Industries, reagent, 5 parts by weight), azobisisobutyronitrile (Wako Pure Chemical) 1 part by weight of Kogyo Kogyo Co., Ltd., reagent) was added and polymerized at 80 ° C. for 3 hours, and then propylene glycol monoethyl ether was added to adjust the solid content to 20% by weight. The weight average molecular weight was about 300,000. Thus, a polymer solution having an antistatic function made of an alkali metal salt-containing polymer having a lithium concentration of 0.6% by weight in the solid content was obtained.

[Preparation Example 2 of polymer having antistatic function]
35 parts by weight of N, N-dimethylaminoethyl methacrylate (manufactured by Mitsubishi Gas Chemical Co., Ltd.), 20 parts by weight of ethyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd., reagent), cyclohexyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd.) , Reagent) 20 parts by weight, stearyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd., reagent) 25 parts by weight, ethyl alcohol 150 parts by weight, azobisisobutyronitrile (manufactured by Wako Pure Chemical Industries, Ltd., reagent) 1 part by weight was introduced into a four-necked flask equipped with a stirrer, a reflux condenser (condenser), a thermometer, and a dropping funnel, the inside of the system was purged with nitrogen, and 6 at a temperature of 80 ° C. under a nitrogen stream. A time polymerization reaction was carried out. Next, 85 parts by weight of a 50% by weight aqueous solution of 3-chloro-2-hydroxypropyltrimethylammonium chloride (manufactured by Wako Pure Chemical Industries, Ltd., reagent) was added, and further reacted at a temperature of 80 ° C. for 15 hours. While dropping, ethyl alcohol was distilled off to obtain a polymer solution having an antistatic function comprising a 20% by weight quaternary ammonium salt copolymer as the final solid content.

[Preparation Example 3 of Polymer Binder]
2-hydroxyethyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd., reagent) 15 parts by weight, methyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd., reagent) 50 parts by weight, ethyl acrylate (manufactured by Wako Pure Chemical Industries, Ltd.) , Reagent) 35 parts by weight and toluene (manufactured by Wako Pure Chemical Industries, Ltd., reagent) 100 parts by weight were charged into a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a dropping funnel. 2,2′-azobis (isobutyronitrile) (manufactured by Wako Pure Chemical Industries, Ltd., reagent) was introduced as an initiator and polymerized at 80 ° C. for 4 hours. The obtained solution was a 50% toluene solution of a hydroxyl group-containing methacrylate polymer having a hydroxyl value of 65. Next, 30 parts by weight of 20% methyl ethyl ketone solution of vinyl chloride-vinyl acetate copolymer (trade name: ZEST C150ML, manufactured by Shin Daiichi Vinyl Co., Ltd.) was added to 100 parts by weight of this solution, and methyl ethyl ketone (Wako Pure Chemical Industries, Ltd. ( Co., Ltd., Reagent) was added to adjust the solid content to 20% by weight to obtain a polymer binder solution.

[Preparation Example 4 of Polymer Binder]
In a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a nitrogen gas inlet, 100 parts by weight of a 25% by weight aqueous solution of polyethyleneimine (manufactured by Nippon Shokubai Co., Ltd., trade name: Epomin P-1000), 1- 10 parts by weight of chlorobutane (manufactured by Wako Pure Chemical Industries, Ltd., reagent) and 10 parts by weight of propylene glycol monomethyl ether (manufactured by Wako Pure Chemical Industries, Ltd., reagent) were introduced and stirred under a nitrogen stream. A denaturation reaction was carried out at a temperature for 20 hours, and then water was added to this solution to adjust the solid content to 20% by weight to obtain a polymer binder solution.

[Preparation Example 1 of Coat Layer]
While stirring methylethylketone gently with a cowless mixer, add a small amount of each of the pigment particles listed in Table 2 and adjust the solids concentration to 20% by weight. The pigment dispersion was prepared by increasing the number of revolutions and stirring for 30 minutes.
Next, the number of rotations of the cowless mixer was decreased, and this pigment dispersion was mixed with the polymer binder solution described in the above preparation example, the polymer solution having an antistatic function, and the curing agent solution described in Table 2 (in ethyl acetate). (Solid content diluted to 20% by weight) was added in this order so that the blending ratios shown in Table 2 were obtained, and the mixture was stirred for 20 minutes as it was, and then passed through a 100 mesh filter to remove coarse particles. Was diluted with methyl ethyl ketone so as to have a solid content concentration shown in Table 2 to obtain a coating solution for coating layer (Preparation Example 1).

[Coating layer adjustment example 2]
In a container equipped with a stirrer, the polymer binder solution described in Table 2 and the polymer solution having an antistatic function were added in this order so as to have the blending ratio described in Table 2, and then in Table 2 with water. It diluted so that it might become the solid content density | concentration of description, and it stirred for 20 minutes as it was, and mixed, and the coating solution (preparation example 2) for coating layers was obtained.

[Production Examples 1, 3, and 4 of resin film layer]
After melt-kneading the thermoplastic resin composition a in an extruder set at 230 ° C., the melt is supplied to an extrusion die set at 250 ° C., extruded into a sheet, and cooled to 60 ° C. by a cooling device to be unstretched. A sheet was obtained. This non-stretched sheet was heated to 150 ° C. and stretched 5 times in the machine direction (MD) using the peripheral speed difference of the roll group. Next, this 5-fold stretched sheet was cooled to 60 ° C., heated again to about 155 ° C. using a tenter oven, stretched 8 times in the transverse direction (TD), and then further heated to 160 ° C. Heat treatment was performed. Then, after cooling to 60 ° C. and slitting the ear, surface treatment by corona discharge was performed on one side of this biaxially stretched resin film to obtain a biaxially stretched resin film having a basis weight described in Table 3, It was set as the resin film layer.

[Production Example 2 of Resin Film Layer]
After melt-kneading the thermoplastic resin composition a in an extruder set at 230 ° C., the melt is supplied to an extrusion die set at 250 ° C., extruded into a sheet, and cooled to 60 ° C. by a cooling device to be unstretched. A sheet was obtained. This non-stretched sheet was heated to 150 ° C. and stretched 5 times in the machine direction (MD) using the peripheral speed difference of the roll group. Next, this 5-fold stretched sheet was cooled to 60 ° C., heated again to about 155 ° C. using a tenter oven, stretched 8 times in the transverse direction (TD), and then further heated to 160 ° C. Heat treatment was performed. Thereafter, it was cooled to 60 ° C., and the ear portion was slit to obtain a biaxially stretched resin film having a thickness of 40 μm and a basis weight of 36 g / m ² . Next, one side of this biaxially stretched resin film was subjected to surface treatment by corona discharge, and then the coating solution obtained in Preparation Example 1 of the coat layer was coated on the surface treated by corona discharge with a gravure coater and dried. Thus, a resin film layer having a coating layer of ² g / m ² was obtained.

[Production Example 5 of Resin Film Layer]
After melt-kneading the thermoplastic resin composition b and the thermoplastic resin composition a with three extruders set at 230 ° C., the melt is supplied to an extrusion die set at 250 ° C. and laminated in the die. It was extruded into a sheet shape and cooled to 60 ° C. with a cooling device to obtain an unstretched sheet. This unstretched sheet was heated to 150 ° C. and stretched 5 times in the longitudinal direction. Next, this 5-fold stretched sheet was cooled to 60 ° C., heated again to about 155 ° C. using a tenter oven and stretched 8 times in the transverse direction, and then heat-treated in a heat setting zone adjusted to 160 ° C. . Then, after cooling to 60 ° C. and slitting the ears, one side of this biaxially stretched resin film was subjected to surface treatment by corona discharge, the thickness was 50 μm, the basis weight was 44 g / m ² , the porosity was 5%, A biaxially stretched resin film having a three-layer structure [each layer resin composition (a / b / a), each layer thickness (2 μm / 46 μm / 2 μm), each layer stretching axis number (2 axes / 2 axes / 2 axes)], This was made into the resin film layer.

[Production Example 6 of Resin Film Layer]
The thermoplastic resin composition c and the thermoplastic resin composition a are each melt-kneaded by three extruders set at 230 ° C., then supplied to an extrusion die set at 250 ° C., and laminated in the die. It was extruded into a sheet shape and cooled to 60 ° C. with a cooling device to obtain an unstretched sheet. This unstretched sheet was heated to 150 ° C. and stretched 5 times in the longitudinal direction. Next, this 5-fold stretched sheet was cooled to 60 ° C., heated again to about 155 ° C. using a tenter oven and stretched 8 times in the transverse direction, and then heat-treated in a heat setting zone adjusted to 160 ° C. . Then, after cooling to 60 ° C. and slitting the ears, one side of this biaxially stretched resin film was subjected to surface treatment by corona discharge, the thickness was 45 μm, the basis weight was 41 g / m ² , the porosity was 0%, A biaxially stretched resin film having a three-layer structure [each layer resin composition (a / c / a), each layer thickness (2 μm / 41 μm / 2 μm), each layer stretching axis number (2 axes / 2 axes / 2 axes)], This was made into the resin film layer.

[Production Example 7 of Resin Film Layer]
The thermoplastic resin composition d and the thermoplastic resin composition e are each melt-kneaded by three extruders set at 230 ° C., then supplied to an extrusion die set at 250 ° C., and laminated in the die. It was extruded into a sheet shape and cooled to 60 ° C. with a cooling device to obtain an unstretched sheet. This unstretched sheet was heated to 145 ° C. and stretched 5 times in the machine direction by utilizing the peripheral speed difference of the roll group. Next, this 5-fold stretched sheet was cooled to 60 ° C., heated again to about 155 ° C. using a tenter oven and stretched 8 times in the transverse direction, and then heat-treated in a heat setting zone adjusted to 160 ° C. . Thereafter, it is cooled to 60 ° C., the ear is slit, the thickness is 45 μm, the basis weight is 36 g / m ² , the porosity is 20%, and the three-layer structure [each resin composition (e / d / e), each layer thickness] A biaxially stretched resin film of (2 μm / 41 μm / 2 μm) and the number of stretch axes in each layer (2 axes / 2 axes / 2 axes)] was obtained.
Next, a surface treatment by corona discharge was performed on one side of the biaxially stretched resin film, and the coating solution obtained in Preparation Example 1 of the coat layer was applied on the surface treated by the corona discharge with a gravure coater and dried. A resin film layer having a coat layer of ² g / m ² was obtained.

[Production Example 8 of Resin Film Layer]
After melt-kneading the thermoplastic resin composition e in an extruder set at 230 ° C., it is supplied to an extrusion die set at 250 ° C. and extruded into a sheet shape, which is cooled to 60 ° C. by a cooling device and is unstretched sheet Got.
This unstretched sheet was heated to 145 ° C. and stretched 5 times in the machine direction by utilizing the peripheral speed difference of the roll group. Next, after melt-kneading the plastic resin composition f in two extruders set at 250 ° C., the sheet was extruded into a sheet and laminated on both sides of the 5-fold stretched sheet prepared above, and a three-layer structure was laminated. A sheet was obtained. Next, the laminated sheet was cooled to 60 ° C., heated to about 150 ° C. again using a tenter oven and stretched 8.5 times in the transverse direction, and then heat-treated in a heat setting zone adjusted to 160 ° C. .
Thereafter, it is cooled to 60 ° C., the ear portion is slit, the thickness is 50 μm, the basis weight is 39 g / m ² , the porosity is 29%, the three-layer structure [each resin composition (f / e / f), each layer thickness (10 μm / 30 μm / 10 μm), the number of stretch axes in each layer (1 axis / 2 axes / 1 axis)] was obtained.
Subsequently, one surface of the stretched resin film was subjected to a surface treatment by corona discharge, and the coating solution obtained in Preparation Example 2 of the coating layer was coated on the treated surface by corona discharge with a squeeze coater and dried. A resin film layer having a coat layer of 1 g / m ² was obtained.

[Production Example 9 of Resin Film Layer]
After melt-kneading the thermoplastic resin composition e in an extruder set at 230 ° C., it is supplied to an extrusion die set at 250 ° C. and extruded into a sheet shape, which is cooled to 60 ° C. by a cooling device and is unstretched sheet Got.
This unstretched sheet was heated to 145 ° C. and stretched 5 times in the machine direction by utilizing the peripheral speed difference of the roll group. Next, the thermoplastic resin composition a and the thermoplastic resin composition f were melted and kneaded by two extruders set at 250 ° C., respectively, and then supplied to an extrusion die set at 250 ° C. and laminated in the die. Then, the sheet was extruded into a sheet shape and laminated so that the composition a was the outermost layer on one side of the 5-fold stretched sheet prepared above. Also, after melt-kneading the plastic resin composition f in an extruder set at 250 ° C., the sheet was extruded into a sheet and laminated on the other surface of the 5-fold stretched sheet prepared above, and a four-layer laminated sheet was formed. Obtained. Next, the laminated sheet was cooled to 60 ° C., heated to about 150 ° C. again using a tenter oven and stretched 8.5 times in the transverse direction, and then heat-treated in a heat setting zone adjusted to 160 ° C. .
Thereafter, it is cooled to 60 ° C., the ear portion is slit and the thickness is 70 μm, the basis weight is 68 g / m ² , the porosity is 23%, a four-layer structure [each resin composition (a / f / e / f), A stretched resin film having a thickness of each layer (20 μm / 10 μm / 30 μm / 10 μm) and a number of stretch axes of each layer (1 axis / 1 axis / 2 axes / 1 axis) was obtained.
Next, the surface of the stretched resin film on the side of the composition f was subjected to surface treatment by corona discharge, and the coating solution obtained in Preparation Example 1 of the coat layer was applied to the treated surface by corona discharge with a gravure coater. And dried to obtain a resin film layer having a coat layer of ² g / m ² .
Table 3 summarizes the physical properties of the resin film layers obtained in the respective production examples.

[Examples 1 to 8]
Using the production apparatus shown schematically in FIG. 20, the resin film layer obtained in Production Examples 2 to 9 of the resin film layer is used as the resin film layer (A), which is unwound from a roll (41). The untreated surface of (A) was subjected to charge injection treatment by direct current corona discharge. As the conditions for the charge injection treatment, the distance between the wire electrode (45) and the counter electrode roll (46) in FIG. 20 was set to 1 cm, and the discharge voltage under the processing conditions shown in Table 4 was used.
Separately, the resin film layer obtained in Production Example 2 was used as the resin film layer (B), which was unwound from the roll (42), and the resin film layer (A) surface subjected to the charge injection treatment as described above, and the resin film layer (B And an untreated surface (uncoated surface) were in contact with each other, and both were pressure-bonded with a pressure-bonding roll (49) to obtain an electrostatic adsorption laminate.
Separately, silicone-treated glassine paper (trade name: G7B, manufactured by Oji Tac Co., Ltd.) was used as the release sheet layer (E), and a solvent-based acrylic pressure-sensitive adhesive (trade name: Olivevine) was used on the silicone-treated surface. BPS1109 (manufactured by Toyochem Co., Ltd.) and an isocyanate cross-linking agent (trade name: Olivevine BHS8515, manufactured by Toyochem Co., Ltd.) in a 100: 3 mixed solution are mixed so that the basis weight after drying is 25 g / m ^2. It was coated with a coater and dried to form an adhesive layer (C).
Next, the adhesive layer (C) was laminated so that the surface of the electrostatic adsorption laminate on the resin film layer (A) side was in contact, and the electrostatic adsorption laminate and glassine paper were pressure-bonded with a pressure-bonding roll. 1 to 8 electrostatic adsorption sheets (iii) were obtained.

[Example 9]
On the untreated surface of the resin film layer obtained in Production Example 8 of the resin film layer, an adhesive (made by Toyo Morton Co., Ltd., trade name: TM-329 and trade name: CAT-18B, equal volume mixture) is applied. After coating at a solid content of 3 g / m ² and drying at 40 ° C. for 1 minute, the resin film layer obtained in Production Example 1 of the resin film layer was bonded so that the untreated surface was on the outside Then, this was used as the resin film layer (A), and the static treatment was carried out in the same manner as in Example 1 except that this untreated surface (of the resin film layer of Production Example 1) was subjected to charge injection treatment by DC corona discharge. An electroadsorption sheet (iii) was obtained.
Furthermore, when a crystal pattern of snow is printed on the surface of the support layer (ii) of the electrostatic adsorption sheet (iii) by UV flexographic printing, and the usage method shown in FIG. The design is enhanced by the pattern of the layer (ii).

[Example 10]
The resin film layer obtained in Production Example 9 of the above resin film layer was used as the resin film layer (A), and this surface-treated surface (composition f side surface) had a solvent-based acrylic strong pressure-sensitive adhesive (trade name: Olivevine BPS5209, Toyochem ( Co., Ltd.) and an isocyanate-based cross-linking agent (trade name: Olivevine BHS8515, manufactured by Toyochem Co., Ltd.) in a 100: 3 mixed solution directly with a comma coater so that the basis weight after drying is 25 g / m ^2. And dried to form an adhesive layer (C). Next, glassine paper (trade name: G7B, manufactured by Oji Tac Co., Ltd.) subjected to silicone treatment is used as the release sheet layer (E), and the adhesive layer (C) is brought into contact with the surface on which the silicone treatment has been performed. Thus, the pressure-sensitive adhesive rolls were pressure-bonded with a pressure roll to obtain a pressure-sensitive adhesive laminate comprising a release sheet layer (E) / adhesive layer (C) / resin film layer (A).
Next, using the production apparatus shown schematically in FIG. 20, the resin film layer obtained in Production Example 2 was unwound from the roll (41) as the resin film layer (B), and the unprocessed surface was charged by DC corona discharge. An injection process was performed. As the conditions for the charge injection treatment, the distance between the wire electrode (45) and the counter electrode roll (46) in FIG. 20 was set to 1 cm, and the discharge voltage under the processing conditions shown in Table 4 was used.
Separately, the pressure-sensitive adhesive laminate is unwound from a roll (42), and the resin film layer (B) surface on which the charge injection treatment is performed as described above, and the untreated surface of the pressure-sensitive adhesive laminate (surface on the resin film layer (A) side) They were laminated so as to be in contact with each other, and both were pressure-bonded with a pressure-bonding roll (49) to obtain an electrostatic adsorption sheet (iii).
Further, a diagram and an explanation of how to use the electrostatic adsorption sheet (iii) of the present invention were printed on the surface of the support layer (ii) of the electrostatic adsorption sheet (iii) by UV offset printing.

[Examples 11 and 12]
Using the production apparatus shown schematically in FIG. 20, the resin film layer obtained in Production Example 2 or 7 of the above resin film layer is used as the resin film layer (A), which is unwound from a roll (41), and the resin film layer The untreated surface of (A) was subjected to charge injection treatment by direct current corona discharge. As the conditions for the charge injection treatment, the distance between the wire electrode (45) and the counter electrode roll (46) in FIG. 20 was set to 1 cm, and the discharge voltage under the processing conditions shown in Table 4 was used.
Separately, the resin film layer obtained in Production Example 2 was used as the resin film layer (B), which was unwound from the roll (42), and the resin film layer (A) surface subjected to the charge injection treatment as described above, and the resin film layer (B And an untreated surface (uncoated surface) were in contact with each other, and both were pressure-bonded with a pressure-bonding roll (49) to obtain an electrostatic adsorption laminate.
Separately, silicone-treated glassine paper (trade name: G7B, manufactured by Oji Tac Co., Ltd.) was used as the release sheet layer (E) and release sheet layer (F), and a solvent-based acrylic system was used on the silicone-treated surface. A 100: 3 mixture of a pressure-sensitive adhesive (trade name: Olivevine BPS1109, manufactured by Toyochem Co., Ltd.) and an isocyanate crosslinking agent (trade name: Olivevine BHS8515, manufactured by Toyochem Co., Ltd.) has a basis weight after drying of 25 g / It was coated by a comma coater such that m ^2, dried adhesive layer (C) and adhesive layer (D) were formed.
Next, the adhesive layer (C) is laminated so that the surface on the resin film layer (A) side of the electrostatic adsorption laminate is in contact, and the electrostatic adsorption laminate and glassine paper are pressure-bonded with a pressure roll, and then The adhesive layer (D) is laminated so that the surface of the electrostatic adsorption laminate on the resin film layer (B) side is in contact, and the entire laminate is pressure-bonded with a pressure roll, and the electrostatic adsorption sheet of Example 11 or 12 (Iii) was obtained.

[Example 13]
The resin film layer obtained in Production Example 9 of the resin film layer was defined as a resin film layer (A). Separately, glassine paper (trade name: G7B, manufactured by Oji Tac Co., Ltd.) subjected to silicone treatment was used as the release sheet layer (E), and a solvent-based acrylic pressure-sensitive adhesive (trade name: Olivevine BPS1109) was used on the silicone-treated surface. , Manufactured by Toyochem Co., Ltd.) and an isocyanate-based crosslinking agent (trade name: Olivevine BHS8515, manufactured by Toyochem Co., Ltd.), a comma coater with a basis weight of 25 g / m ² after drying. It was coated and dried to form an adhesive layer (C).
Next, the pressure-sensitive adhesive layer (C) is laminated so that the surface-treated surface (composition f side surface) on the resin film layer (A) side is in contact, and the resin film layer (A) and glassine paper are pressure-bonded with a pressure roll. Thus, an adhesive laminate I composed of a release sheet layer (E) / adhesive layer (C) / resin film layer (A) was obtained.

Similarly, the resin film layer obtained in Production Example 2 of the resin film layer was defined as a resin film layer (B). Separately, glassine paper treated with silicone (trade name: G7B, manufactured by Oji Tac Co., Ltd.) was used as the release sheet layer (F), and a solvent-based acrylic pressure-sensitive adhesive (trade name: Olivevine BPS1109) was used on the silicone-treated surface. , Manufactured by Toyochem Co., Ltd.) and an isocyanate-based crosslinking agent (trade name: Olivevine BHS8515, manufactured by Toyochem Co., Ltd.), a comma coater with a basis weight of 25 g / m ² after drying. And dried to form an adhesive layer (D).
Next, the adhesive layer (D) is laminated so that the surface-treated surface on the resin film layer (B) side is in contact, and the resin film layer (B) and glassine paper are pressure-bonded with a pressure roll to release sheet layer (F ) / Adhesive layer (D) / resin film layer (B) was obtained.
Using the manufacturing apparatus shown schematically in FIG. 20, the adhesive laminate I was unwound from a roll (41), and charge injection treatment by direct current corona discharge was performed on the surface on the resin film layer (A) side. As the conditions for the charge injection treatment, the wire electrode (45) and the counter electrode roll (46) in FIG.
Was set to 1 cm, and the discharge voltage under the processing conditions shown in Table 4 was used.
Separately, the pressure-sensitive adhesive laminate II is unwound from a roll (42), and the surface of the resin film layer (A) on which the charge injection treatment has been performed as described above is in contact with the surface of the pressure-sensitive adhesive laminate II on the resin film layer (B) side. They were laminated and both were pressure-bonded with a pressure roll (49) to obtain an electrostatic adsorption sheet (iii).

[Comparative Example 1]
As in Patent Documents 1 and 2, a double-sided pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive was provided on both sides of a transparent film was obtained. Specifically, glassine paper (trade name: G7B, manufactured by Oji Tac Co., Ltd.) subjected to silicone treatment is used as the release sheet layer (E), and a solvent-based acrylic pressure-sensitive adhesive (trade name) is used on the silicone-treated surface. : Oribain BPS1109, manufactured by Toyochem Co., Ltd.) and an isocyanate-based crosslinking agent (trade name: Olivain BHS8515, manufactured by Toyochem Co., Ltd.) in a 100: 3 mixture so that the basis weight after drying is 25 g / m ^2. It was coated with a comma coater and dried to form an adhesive layer (C).
Next, the adhesive layer (C) is laminated so that the surface-treated surface of the resin film layer obtained in Production Example 3 of the resin film layer is in contact therewith, and the resin film layer and glassine paper are pressure bonded with a pressure roll and peeled off. An adhesive laminate comprising a sheet layer (E) / adhesive layer (C) / resin film layer was obtained.

Separately, glassine paper (trade name: G7B, manufactured by Oji Tac Co., Ltd.) subjected to silicone treatment was used as the release sheet layer (F), and a solvent-based acrylic pressure-sensitive adhesive (trade name: Olivevine BPS1109, Toyochem Co., Ltd.) and isocyanate cross-linking agent (trade name: Olivevine BHS8515, Toyochem Co., Ltd.) 100: 3 mixed solution with a comma coater so that the basis weight after drying is 25 g / m ² It applied and dried and formed the adhesion layer (D).
Next, the pressure-sensitive adhesive layer (D) is laminated so that the untreated surface of the resin film layer of the pressure-sensitive adhesive laminate is in contact therewith, and the whole is pressure-bonded with a pressure-bonding roll, and the release sheet layer (E) / pressure-sensitive layer (C) A double-sided PSA sheet consisting of: / resin film layer / adhesive layer (D) / release sheet layer (F) was obtained.
Table 1 shows the combination of the resin film layer (A) and the resin film layer (B) used in Examples 1 to 13 and Comparative Example 1 of the present invention, the discharge voltage during the charge injection treatment, and the evaluation results based on the following test examples. 4 collectively.

[Evaluation method]
(Thickness)
The thickness in the present invention was measured using a constant pressure thickness measuring instrument (trade name: PG-01J, manufactured by Teclock Corporation) in accordance with JIS-K-7130.
When the formed resin film layer (A) has a multilayer structure, the thickness of each layer is determined by cooling the sample to be measured with liquid nitrogen to a temperature of −60 ° C. or lower, and razor the sample placed on the glass plate. A sample for cross-section measurement was created by cutting the blade (made by Chic Japan Co., Ltd., trade name: Proline Blade) at a right angle, and the obtained sample was scanned electron microscope (JEOL Ltd., product Name: JSM-6490) is used for cross-sectional observation, the boundary line for each thermoplastic resin composition is determined from the composition appearance, and the total thickness of the resin film layer (A) is multiplied by the observed layer thickness ratio. And asked.

(Basis weight)
In the present invention, the basis weight of the resin film layer (A), the resin film layer (B), the printing sheet layer (G), the printing sheet layer (H), the adsorption sheet (i) and the adsorption sheet (iv) is JIS- In accordance with P-8124, a sample punched out to a size of 100 mm × 100 mm was weighed with an electronic balance and measured.
The basis weights of the adhesive layer (C), the adhesive layer (D), the coat layer (I) and the coat layer (J) were calculated from the individual basis weights determined above.
(Surface resistivity)
The surface resistivity in the present invention is a double ring method in accordance with JIS-K-6911: 1995 when the surface resistivity is 1 × 10 ⁷ Ω or more under conditions of a temperature of 23 ° C. and a relative humidity of 50%. It measured using the electrode of. When the surface resistivity was less than 1 × 10 ⁷ Ω, it was measured by measuring with a four-end needle according to JIS-K-7194: 1994.

(Adsorption power)
The electrostatic adsorption sheet (iii) is cut into a size of 200 mm × 220 mm and stored for 1 day in an atmosphere with a relative humidity of 50%, and then the label layer (i) from the electrostatic adsorption sheet (iii) in the same atmosphere. Is peeled off and pasted onto the glass plate of the adsorption force measuring device so that the adsorption area becomes 200 mm x 200 mm and the lower end of the label layer (i) protrudes 20 mm wide, and a clip is attached to the lower end of the label layer (i). Then, add 10 g of weight with the thread attached to the clip one by one and calculate the adsorption force per square meter from the weight of the weight when the label layer (i) slips down. evaluated.
○: Good Adsorbing power is 5000 g / m ² or more Δ: Slightly good Adsorbing power is 1000 g / m ² or more and less than 5000 g / m ² ×: Poor Adsorption power is less than 1000 g / m ²

(With or without air accumulation)
As a printing paper, synthetic paper (trade name: “YUPO” FEB-130, basis weight 100.1 g / m ² , manufactured by YUPO Corporation) cut into half size is used, and there are 4 colors on both sides. A printed matter (printing sheet layer (G)) subjected to offset printing was prepared.
Next, using a cold laminator, the release sheet layer (E) was peeled off while winding the electrostatic adsorption sheet (iii) obtained in Examples 1 to 13 and the double-sided pressure-sensitive adhesive sheet obtained in Comparative Example 1, and the adhesive after peeling. The above double-sided printed material is bonded onto the layer (C), and the electrostatic adsorption sheet (iii) containing the printing sheet layer (G) / adhesive layer (C) / resin film layer (A) / resin film layer (B) Obtained. At this stage, no air pockets were generated between the adhesive layer (C) and the printed material in all Examples and Comparative Examples.
Next, the electrostatic adsorption sheet (iii) or double-sided pressure-sensitive adhesive sheet on which the printing sheet layer (G) is laminated is cut into an A4 size, and then the support layer (ii) or the adsorption sheet (iv) is peeled off. G) and a display material consisting of the adsorption sheet (i) (in the case of a double-sided pressure-sensitive adhesive sheet, the release sheet layer (F) was peeled off to obtain a display material consisting of a printing sheet layer (G) and a double-sided pressure-sensitive adhesive sheet).
Next, the surface on the resin film layer (A) side of this display (the surface of the pressure-sensitive adhesive layer (D) in the case of a double-sided pressure-sensitive adhesive sheet) is adhered so as to be in contact with a transparent and smooth glass plate, and the printed matter is often removed manually The air was removed by handling, and the presence or absence of air accumulation was evaluated according to the following criteria. Since the resin film layer (A) used for the electrostatic adsorption sheet (iii) or the double-sided pressure-sensitive adhesive sheet of Examples 1 to 5, Example 11 and Comparative Example 1 is transparent, The printing could be visually recognized through the resin film layer (A). In other examples, printing could not be visually recognized from the glass surface, but the presence or absence of air accumulation was evaluated from the glass plate surface side.
○: Good Air accumulation cannot be confirmed visually. ×: Poor air accumulation can be confirmed.

As is clear from the above results, the electrostatically adsorbing sheet (iii) of the present invention has a non-adhesive printed material between the adherend and the printed material when displayed on the adherend as a poster or advertisement. The air can be easily removed, and the appearance of the printed matter is not impaired. In addition, the electrostatic adsorption sheet has a high electrostatic adsorption force when used for display, has sufficient sustainability of the electrostatic adsorption force, can be used for display on an adherend for a long time, and is easily peeled off after use. be able to. The electrostatic adsorption sheet is characterized in that the electrostatic adsorption force is hardly affected by humidity.
In addition, when the resin film layer and the adhesive layer in the electrostatic adsorption sheet are transparent or semi-transparent, the information on the printed material such as characters and designs is displayed from the printed material adhered to the adherend. Can be seen through the adsorption sheet and the transparent adherend.

1 Electrostatic adsorption sheet (iii)
2 Adsorption sheet (i)
3 Support (ii)
4 Adsorption sheet (iv)
5 Resin film layer (A)
6 Resin film layer (B)
7 Adhesive layer (C)
8 Adhesive layer (D)
9 Release sheet layer (E)
10 Release sheet layer (F)
11 Print sheet layer (G)
12 Print sheet layer (H)
13 Coat layer (I)
14 Coat layer (J)
15 Adhesive surface by electrostatic adsorption 16 Printing 31 Resin film layer (A) or resin film layer (B)
32 DC high-voltage power supply 33 Needle-like application electrode (planar arrangement)
34 Plate-like ground electrode 35 Wire-like applied electrode 36 Needle-like applied electrode 37 Roll-like ground electrode 38 Wire-like applied electrode 39 Needle-like electrode (disposed in a horizontal row)
41 Resin film layer (A) or adsorption sheet (i)
42 Resin film layer (B) or support layer (ii) or adsorption sheet (iv)
43 Posting sheet (iii)
44 DC high-voltage power supply 45 Needle-like application electrode (horizontal single row arrangement)
46 Rolled ground electrode 47 Guide roll (ground ground connection)
48 Nip roll 49 Nip roll (bonding roll)
61 Display object 62 Substrate (glass plate, etc.)
63 Adsorption sheet (i)
64 Printed matter or printed sheet layer (G)
65 Support layer (ii)

Claims (22)

An electrostatic adsorption sheet in which an adsorption sheet (i) including a resin film layer (A) provided with an adhesive layer (C) on one side and a support layer (ii) including a resin film layer (B) are laminated,
An electrostatic adsorption sheet (iii), wherein the resin film layer (A) of the adsorption sheet (i) and the resin film layer (B) of the support layer (ii) are electrostatically adsorbed. Adsorption sheet (i) including a resin film layer (A) provided with an adhesive layer (C) on one side and an adsorption sheet (iv) including a resin film layer (B) provided with an adhesive layer (D) on one side Electrostatic adsorption sheet,
An electrostatic adsorption sheet (iii), wherein the resin film layer (A) of the adsorption sheet (i) and the resin film layer (B) of the adsorption sheet (iv) are electrostatically adsorbed.   The electrostatic adsorption sheet (iii) according to claim 1 or 2, wherein a release sheet layer (E) is further provided on the adhesive layer (C).   The electrostatic attraction sheet (iii) according to claim 1 or 2, further comprising a printing sheet layer (G) provided on the adhesive layer (C).   The electrostatic adsorption sheet (iii) according to any one of claims 2 to 4, wherein a release sheet layer (F) is further provided on the adhesive layer (D).   The electrostatic adsorption sheet (iii) according to any one of claims 2 to 4, wherein a printing sheet layer (H) is further provided on the adhesive layer (D).   The electrostatic adsorption sheet (iii) according to any one of claims 1 to 6, wherein the resin film (A) and the resin film (B) contain a thermoplastic resin.   The electrostatic adsorption sheet (iii) according to claim 7, wherein the thermoplastic resin includes any of a polyolefin resin, a functional group-containing polyolefin resin, a polyamide resin, and a thermoplastic polyester resin. The surface resistivity of the surface of the resin film (A) on the side in contact with the resin film (B) and the surface of the resin film layer (B) on the side in contact with the resin film (A) are 1 × 10 ^{13 to} 9 × 10 ¹⁷ , respectively. The electrostatic attraction sheet (iii) according to any one of claims 1 to 8, wherein the sheet is Ω. The basis weight of a resin film (A) and a resin film (B) is 20-500 g / m < ² >, respectively, The electrostatic adsorption sheet (iii) as described in any one of Claims 1-9 characterized by the above-mentioned. . The basis weight of the pressure-sensitive adhesive layer (C) is 3 to 60 g / m ² , and the basis weight of the printed sheet layer (G) is 20 to 500 g / m ^2. The electrostatic adsorption sheet (iii) according to item. The basis weight of the adhesive layer (D) is 3 to 60 g / m ² , and the basis weight of the printed sheet layer (H) is 20 to 500 g / m ^2. The electrostatic adsorption sheet (iii) according to item. The pressure-sensitive adhesive layer (C) contains any one of an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive. Electroadsorption sheet (iii).   The pressure-sensitive adhesive layer (D) contains any one of an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, and a silicone-based pressure-sensitive adhesive. Electroadsorption sheet (iii).   At least one of the resin film layer (A) and the resin film layer (B) is charged, and both are laminated by electrostatic adsorption, and then the adhesive layer (C) is laminated on the surface on the resin film layer (A) side. The method for producing an electrostatic attraction sheet (iii) according to claim 1.   The adhesive layer (C) is laminated on one surface of the resin film layer (A), and then at least one of the resin film layer (A) and the resin film layer (B) is charged, and both are laminated by electrostatic adsorption. The method for producing an electrostatic attraction sheet (iii) according to claim 1.   At least one of the resin film layer (A) and the resin film layer (B) is charged, both are laminated by electrostatic adsorption, and then the adhesive layer (C) is formed on the surface of the resin film layer (A) side. The method for producing an electrostatic adsorption sheet (iii) according to claim 2, wherein the adhesive layer (D) is provided on the surface on the resin film layer (B) side.   The adhesive layer (C) is laminated on one surface of the resin film layer (A), and the adhesive layer (D) is laminated on one surface of the resin film layer (B), and then the resin film layer (A) and the resin film layer are laminated. The electrostatic adsorption sheet (iii) according to claim 2, wherein at least one of (B) is charged and the resin film layer (A) and the resin film layer (B) are laminated by electrostatic adsorption. Manufacturing method.   The display thing containing the adsorption sheet (i) formed by peeling a support body layer (ii) or an adsorption sheet (iv) from the electrostatic adsorption sheet (iii) of any one of Claims 1-14.   The display thing containing the adsorption sheet (iv) formed by peeling the adsorption sheet (i) from the electrostatic adsorption sheet (iii) of any one of Claims 1-14.   A display object comprising an adsorption sheet (i) and a printed sheet layer (G), wherein the support layer (ii) or the adsorption sheet (iv) is peeled from the electrostatic adsorption sheet (iii) according to claim 4. A display object in which the resin film layer (A) side surface is adhered to an adherend by electrostatic adsorption.   The resin film layer (A), the pressure-sensitive adhesive layer (C), and the adherend are transparent or translucent, and printing on the print sheet layer (G) is visible through the adherend. The display object according to claim 21.