JP6127508B2 - Peeling substrate and laminate - Google Patents

Description

  The present invention relates to a release substrate and a laminate.

  Conventionally, a technique is known in which a pressure-sensitive adhesive sheet is attached to a release substrate in a peelable manner, and the pressure-sensitive adhesive sheet is peeled off from the release substrate and used on an adherend during use (Patent Documents 1 to 3). The pressure-sensitive adhesive sheet is cut into an appropriate size according to the use and is attached to the adherend.

JP 2006-225469 A JP 2004-346302 A JP 2002-212524 A

  Cut the adhesive sheet affixed to the release substrate into a predetermined size, peel the cut adhesive sheet from the release substrate, and automate the process until the adhesive sheet is applied to the adherend (automatic mounting) Possible).

  Assuming the case of automatic mounting, if the adhesive force between the release substrate and the adhesive sheet is too strong, the peeled adhesive sheet can be peeled off from the release substrate by holding and lifting the adhesive sheet. There is a possibility that the base material comes on the adhesive sheet.

  Moreover, when a pressure sensitive adhesive sheet is cut, a peeling base material may be cut together. In this case, since the weight of the peeling base material stuck on the pressure-sensitive adhesive sheet is reduced, when the cut pressure-sensitive adhesive sheet is gripped and lifted, the peeling base material becomes more easily attached to the pressure-sensitive adhesive sheet.

  This invention is made | formed in view of the above point, and it aims at providing the peeling base material and laminated body which can solve at least one of said subject.

The release substrate of the present invention is
A sheet-like release substrate to which the pressure-sensitive adhesive sheet can be peeled off, wherein the first surface on the pressure-sensitive adhesive sheet side is uneven, and the second surface opposite to the first surface is flat. It is characterized by being.

  The peeling base material of the present invention has a first surface on which irregularities are formed. If the pressure sensitive adhesive sheet is attached to the first surface, the peeling force when peeling the pressure sensitive adhesive sheet from the peeling base material is achieved. It can be within a suitable range. As a result, for example, even when the pressure-sensitive adhesive sheet is peeled from the peeling substrate by automatic mounting, it is difficult for the peeling substrate to come about the pressure-sensitive adhesive sheet.

  In addition, since the second surface of the release substrate is flat, for example, when the adhesive sheet is cut in automatic mounting, the release substrate may be cut from the first surface to the second surface. Hard to occur.

  In the peeling base material of the present invention, when the first surface is brought into contact with a flat surface, it is preferable that a ratio of an area in contact with the flat surface of the first surface is 44 to 95%. . By making it in this range, it becomes easy to make the peeling force when peeling the pressure-sensitive adhesive sheet from the peeling substrate within the suitable range.

  When the pressure-sensitive adhesive sheet having any tackiness of 0 to 30 mm in the rolling ball tack test defined by ASTM (American Society for Testing and Materials) D3121 is attached to the first surface, the first surface and the It is preferable that the mold release force with the pressure-sensitive adhesive sheet is 0.02 to 0.2 N / 50 mm in a 180 ° peel test defined by JIS Z0237.

The laminated body of this invention is equipped with the said peeling base material and the adhesive sheet affixed on the said peeling base material so that peeling is possible, It is characterized by the above-mentioned.
The peeling base material which comprises the laminated body of this invention is equipped with the 1st surface in which the unevenness | corrugation was formed, and if an adhesive sheet is affixed on the 1st surface, an adhesive sheet will be peeled from a peeling base material. The peeling force can be within a suitable range. As a result, for example, even when the pressure-sensitive adhesive sheet is peeled from the peeling substrate by automatic mounting, it is difficult for the peeling substrate to come about the pressure-sensitive adhesive sheet.

  In addition, since the second surface of the release substrate is flat, for example, when the adhesive sheet is cut in automatic mounting, the release substrate may be cut from the first surface to the second surface. Hard to occur.

  The laminated body of this invention can be equipped with the resin sheet affixed on the surface on the opposite side to the said peeling base material among the said adhesive sheets, for example. In this case, for example, the pressure-sensitive adhesive sheet material is applied to one side of the resin sheet to produce a pressure-sensitive adhesive sheet, and then the pressure-sensitive adhesive sheet with the resin sheet attached is attached to a release substrate by the method of the present invention. A laminated body can be manufactured easily.

2 is a plan view illustrating a configuration of a peeling substrate 1. FIG. It is sectional drawing showing the cross section in the II-II cross section in FIG. It is sectional drawing showing the cross section of the peeling base material 1 of another form. It is a top view showing the structure of the peeling base material 1 of another form. It is sectional drawing showing the cross section of the peeling base material 1 of another form. 3 is a cross-sectional view illustrating a cross section of a stacked body 103. FIG. It is sectional drawing showing the cross section of the laminated body 103 of another form.

Embodiments of the present invention will be described with reference to the drawings.
The material of the release substrate is not particularly limited, and various resins can be used. Examples of the resin include PE (polyethylene), PET (polyethylene terephthalate), fluorine-based resin, polyolefin-based resin, and polystyrene-based resin. For example, a release treatment can be applied to the first surface of the release substrate. Examples of the release treatment include silicone treatment and fluorine treatment.

  For example, as shown in FIGS. 1 and 2, the uneven shape of the first surface may be a shape in which island-like regions 3 are regularly arranged at regular intervals, and the island-like regions 3 are concave portions. As shown in FIGS. 1 and 3, the island-like regions 3 may be regularly arranged at regular intervals, and the island-like regions may be convex. The shape of the island-shaped region 3 is not particularly limited. For example, a quadrangle (for example, a square, a rectangle, a rhombus, a trapezoid, etc.) as shown in FIG. 1, a circle, an ellipse, a triangle, a hexagon as shown in FIG. Etc.

Of the concavo-convex shape of the first surface, the convex portion becomes a portion that comes into contact with the pressure-sensitive adhesive sheet, and the concave portion becomes a portion that hardly touches the pressure-sensitive adhesive sheet (or is not strongly pressed against the pressure-sensitive adhesive sheet even if contacted).
The length (L ₁ in FIG. 2) in the longitudinal direction of the island-shaped region 3 can be set to 0.8 to 4.0 mm, for example. The space | interval (L2 in FIG. ₂ ) of the island-shaped area | regions 3 can be 0.2-1.0 mm, for example. The period of the island-like region 3 (L ₃ in FIG. 2) can be set to 1 to 5 mm, for example. The height difference (L ₄ in FIG. 2) between the concave portion and the convex portion can be set to, for example, 50 to 200 μm.

  The uneven shape of the first surface can be formed, for example, by embossing a flat resin film. For example, it can form by attaching a convex part partially with respect to a flat resin film. For example, it can form by providing a recessed part partially in a flat resin film.

  The shape of the second surface is flat. The shape of the second surface may have, for example, minute irregularities caused by the material itself constituting the second surface. Further, the second surface may partially have unevenness caused by scratches, wrinkles, and the like.

  When the first surface is brought into contact with the flat surface, the ratio of the area of the first surface that contacts the flat surface (hereinafter referred to as the contact area ratio) is 44 to 95%. The contact area ratio can be calculated, for example, by applying a colorant to the first surface, pressing the first surface against paper or the like to transfer the colorant, and measuring the area of the portion to which the colorant has been transferred.

  When the contact area ratio is within the above range, the release force between the pressure-sensitive adhesive sheet having the tackiness of 0 to 30 mm and the first surface in the rolling ball tack test specified by ASTM D3121 and the first surface is within a suitable range ( For example, it can be 0.02 to 0.2 N / 50 mm in a 180 ° peel test defined by JIS Z0237.

  When the pressure-sensitive adhesive sheet is automatically mounted, it is preferable that the pressure-sensitive adhesive sheet has high tackiness because the pressure-sensitive adhesive sheet is less likely to be displaced. In the case of a pressure-sensitive adhesive sheet having a tackiness value of 0 to 10 mm, the release force between the pressure-sensitive adhesive sheet and the first surface is set to a suitable range (for example, by setting the contact area ratio on the first surface to 44 to 55%. In the 180 ° peel test defined by JIS Z0237, 0.02 to 0.2 N / 50 mm).

  In addition, the range of the contact area ratio which makes the mold release force of an adhesive sheet and the 1st surface suitable is narrow, so that the tack property of an adhesive sheet is high. This tendency is a new finding found by the present inventors.

  For example, as shown in FIGS. 2 and 3, the peeling substrate 1 is formed by laminating a first resin sheet 7 on the first surface 5 side and a second resin sheet 11 on the second surface 9 side. be able to. Further, as shown in FIG. 5, the release substrate may be composed of a single resin sheet. The release substrate 1 may be a laminate of three or more sheets.

  The structure and material of the adhesive sheet are not particularly limited. An adhesive sheet can be comprised from the main-body part and the adhesive layer provided in the single side | surface or both surfaces of the main-body part, for example. Examples of the material of the main body include silicone resins, acrylic resins, urethane resins, synthetic rubber materials, fluorine resins, and epoxy resins. Examples of the material for the adhesive layer include acrylic resins, silicone resins, and synthetic rubber materials.

  Moreover, as an adhesive at the time of laminating | stacking the 1st resin sheet 7 and the 2nd resin sheet 11, an acrylic resin, a silicone type resin, a synthetic rubber type material, a polyester-type resin (thermal bonding) etc. are mentioned, for example. Can be mentioned.

  As shown in FIGS. 6 and 7, the pressure-sensitive adhesive sheet 101 is detachably attached to the first surface 5 side of the release substrate 1 to constitute a laminate 103. For example, as illustrated in FIG. 7, the laminated body 103 can include a resin sheet 105 that is attached to the surface of the pressure-sensitive adhesive sheet 101 opposite to the peeling substrate 1. The material of the resin sheet 105 is not specifically limited, For example, PE, PET, a fluorine resin, a polyolefin resin, a polystyrene resin etc. are mentioned.

The laminated body 103 shown in FIG. 7 can be manufactured as follows, for example. First, the material of the adhesive sheet 101 is applied to one side of the resin sheet 105 to manufacture the adhesive sheet 101. Next, the adhesive sheet 101 with the resin sheet 105 attached is attached to the peeling substrate 1 in the direction shown in FIG.
Example 1
1. Production of Peeling Substrate 1 A flat resin sheet made of PE was embossed to produce a first resin sheet 7 having the shape shown in FIGS. The first resin sheet 7 has a shape in which island-like regions 3 that are concave portions are regularly arranged at regular intervals. The length (L ₁ in FIG. 2) in the longitudinal direction of the island-like region 3 is about 1 mm. Further, the height difference (L ₄ in FIG. 2) between the concave portion and the convex portion is about 0.2 μm. The film thickness of the first resin sheet 7 is 100 μm.

  Next, the flat 2nd resin sheet 11 was adhere | attached on the lower surface in FIG. 2 among the 1st resin sheets 7, and the peeling base material 1 was completed. This adhesion was performed by forming a pressure-sensitive adhesive layer on the surface of the second resin sheet 11 opposite to the second surface 9 and using a pressure laminate. The material of the second resin sheet 11 is PET, and the film thickness is 50 μm. Of the release substrate 1, the surface on the first resin sheet 7 side is the first surface 5 and has irregularities. Moreover, the 2nd resin sheet 11 side surface is the 2nd surface 9 among the peeling base materials 1, and is flat.

2. Manufacture of Laminate 103 A pressure-sensitive adhesive sheet 101 is manufactured by a known method, and the pressure-sensitive adhesive sheet 101 is detachably attached to the first surface 5 of the release substrate 1 as shown in FIG. 103 was completed. The material of the adhesive sheet 101 is silicone, and the film thickness is 1 mm.

3. Test of Release Force The release force when peeling the adhesive sheet 101 from the release substrate 1 was measured by a 180 ° peel test specified by JIS Z0237. The measurement was performed by changing the contact area ratio in the release substrate 1 in various ways. In addition, the contact area ratio in the peeling base material 1 was adjusted by changing the space | interval (L2 in FIG. ₂ ) between island-like area | regions 3. FIG. Moreover, the measurement was performed by changing the tackiness of the pressure-sensitive adhesive sheet 101 in various ways. In addition, tack property is specified by the result of the rolling ball tack test prescribed | regulated by ASTMD3121. Table 1 shows the main measurement results.

表１において「○」は、離形力が０．０２〜０．２Ｎ／５０ｍｍの範囲内にあることを表し、「×」は、離形力が０．０２〜０．２Ｎ／５０ｍｍの範囲外にあることを表す。表１に示すとおり、接触面積比を４４〜９５％とすれば、０〜３０ｍｍのうちのいずれかのタック性を有する粘着シート１０１に対し、離形力を好適な範囲にすることができた。

In Table 1, “◯” indicates that the release force is in the range of 0.02 to 0.2 N / 50 mm, and “X” indicates that the release force is in the range of 0.02 to 0.2 N / 50 mm. Represents being outside. As shown in Table 1, when the contact area ratio was 44 to 95%, the release force could be in a suitable range for the pressure-sensitive adhesive sheet 101 having any tackiness of 0 to 30 mm. .

  When the contact area ratio was less than 44%, the release force was smaller than the preferred range even when the pressure-sensitive adhesive sheet 101 having a tackiness of 0 mm was used. Moreover, when the contact area ratio exceeded 95%, even when the pressure-sensitive adhesive sheet 101 having a tackiness of 30 mm was used, the releasing force was larger than the preferred range.

4). Effects exhibited by the peeling substrate 1 and the laminate 103 (1) Since the peeling force when peeling the adhesive sheet 101 from the peeling substrate 1 in the laminate 103 is within a suitable range, the adhesive sheet 101 is peeled off by automatic mounting. Even when peeling from the base material 1, it is difficult for the peeling base material 1 to come about the adhesive sheet 101.

  (2) Since the second surface 9 of the peeling substrate 1 is flat, when the adhesive sheet 101 is cut in automatic mounting, the peeling substrate 1 is cut from the first surface to the second surface. It is hard to happen.

  That is, if the release substrate 1 is composed only of the first resin sheet 7 shown in FIG. 2 and the second surface 9 has the same uneven shape as the first surface 5, the release substrate together with the adhesive sheet 101 is used. When one convex portion is cut, the cut reaches the second surface 9, but the above problem can be suppressed by the flat second surface. As a result, it is possible to prevent the release substrate 1 from being cut into the same shape as the pressure-sensitive adhesive sheet 101.

  In addition, this invention is not limited to the said embodiment at all, and it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from this invention.

DESCRIPTION OF SYMBOLS 1 ... Peeling base material, 3 ... Island-like area | region, 5 ... 1st surface, 7 ... 1st resin sheet,
9 ... 2nd surface, 11 ... 2nd resin sheet, 101 ... Adhesive sheet,
103 ... Laminated body, 105 ... Resin sheet

Claims (4)

It is a sheet-like release substrate that can be peeled off and attached to an adhesive sheet,
Concavities and convexities are formed on the first surface on the pressure-sensitive adhesive sheet side, and the second surface opposite to the first surface is flat,
When the first surface is brought into contact with a flat surface, the ratio of the area of the first surface that contacts the flat surface is 44 to 95%,
Unevenness of the first surface is to have a island-like recesses or shaped protrusions are arranged in a flat plane,
The release substrate is
A first sheet having a shape in which island-shaped convex portions are arranged on a flat surface;
A second flat sheet laminated on the second surface side of the first sheet, and
Said 2nd sheet | seat is a sheet-like peeling base material characterized by having a space between the said island-shaped convex part while contacting the said flat surface among said 1st sheets . It is a sheet-like release substrate that can be peeled off and attached to an adhesive sheet,
Concavities and convexities are formed on the first surface on the pressure-sensitive adhesive sheet side, and the second surface opposite to the first surface is flat,
When the first surface is brought into contact with a flat surface, the ratio of the area of the first surface that contacts the flat surface is 44 to 95%,
The unevenness of the first surface has a shape in which island-shaped concave portions or convex portions are arranged on a flat surface,
The release substrate is
A first sheet having a shape in which island-shaped recesses are arranged on a flat surface;
A second flat sheet laminated on the second surface side of the first sheet, and
Said 2nd sheet | seat is a sheet-like peeling base material characterized by having a space between the said flat surfaces while contacting the said island-shaped recessed part among said 1st sheets. Laminate of a release substrate according to claim 1 or 2, and the pressure-sensitive adhesive sheet for peelably to the release substrate, comprising: a. The laminate according to claim 3 , comprising a resin sheet attached to a surface of the pressure-sensitive adhesive sheet opposite to the peeling substrate.

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