Adhesive sheet and surface protective film

A technology for adhesive sheets and adhesives, applied in the directions of adhesives, transportation and packaging, conductive adhesives, etc., which can solve the problems of reduced identification and reduced transparency of antistatic layers.

Inactive Publication Date: 2012-08-08
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the thickness of the antistatic layer becomes extremely small, it is difficult to impart sufficient antistatic properties to the surface protection film from the antistatic layer.
As a method of compensating for the decrease in antistatic performance caused by the decrease in thickness, it is also possible to consider increasing the content of antistatic components, but if this method is used, the transparency of the antistatic layer will often decrease (that is, the visibility will decrease)

Method used

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  • Adhesive sheet and surface protective film
  • Adhesive sheet and surface protective film
  • Adhesive sheet and surface protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0157] Hereinafter, some embodiments related to the present invention will be described, but the present invention is not intended to be limited to such specific examples. In addition, "part" and "%" in the following description are based on mass unless otherwise indicated.

[0158] In addition, each characteristic in the following description was measured or evaluated as follows, respectively.

[0159]

[0160] The glass transition temperature (Tg) (° C.) was determined by the following method using a dynamic viscoelasticity measuring device (manufactured by Rheometrics, ARES).

[0161] That is, an acrylic polymer sheet (thickness: 20 μm) was laminated so as to have a thickness of about 2 mm, and this was punched out into cylindrical pellets of 7.9 mm in diameter, and used as a sample for Tg measurement. The measurement sample was fixed in a jig of a Φ7.9mm parallel plate, and the temperature dependence of the loss modulus G" was measured by the dynamic viscoelasticity mea...

example 1

[0220] Apply corona treatment on one side (first side) to the corona treatment side of a transparent polyethylene terephthalate (PET) film with a thickness of 38 μm, a width of 30 cm, and a length of 40 cm. The above-mentioned coating composition (D1) was made to have a dried thickness of 10 nm. The coating material was heated and dried at 130° C. for 2 minutes, thereby producing a base film with an antistatic layer (E1) having an antistatic layer on the first surface of the PET film. An adhesive composition (G1) containing an ionic liquid was applied on the second surface of the base film (E1), and dried by heating at 130° C. for 2 minutes to form an adhesive layer with a thickness of 15 μm. On one side of this adhesive layer, the release-treated surface of a PET film (release liner) with a thickness of 25 μm that was released with a silicone-based release treatment agent was attached to one side, and an adhesive sheet related to this example was produced. . The adhesive sh...

example 2

[0222] Except having adjusted the coating amount of the coating composition (D1) so that the thickness of the antistatic layer might be 20 nm, it carried out similarly to Example 1, and produced the base film (E2) with an antistatic layer. Except having used this base film (E2), it carried out similarly to Example 1, and produced the adhesive sheet concerning this example. The adhesive sheet has an antistatic layer with a thickness of 20 nm formed by the coating composition (D1) on the first side of the PET film, and has an antistatic layer formed by the adhesive composition (G1) on the second side of the PET film. Adhesive layer with a thickness of 15 μm.

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Abstract

A pressure-sensitive adhesive sheet 1 provided by the present invention is provided with a substrate film 12 comprising a transparent resin material, an antistatic layer 14 provided on a first side 12A thereof, and a pressure-sensitive adhesive layer 20 provided on a second side 12B thereof. The antistatic layer 14 contains an antistatic component (for example, an electroconductive polymer) and a binder resin, and has an average thickness Dave of 1 nm to less than 100 nm. The pressure-sensitive adhesive layer 20 contains an acrylic polymer as a base polymer and an ionic compound (such as an ionic liquid and alkaline metal salt) as an antistatic component.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2011-023276 filed on February 4, 2011, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to an adhesive sheet having an adhesive (also referred to as a pressure-sensitive adhesive, hereinafter the same) layer on a film made of a transparent resin material, and specifically relates to an adhesive sheet having an antistatic function. The adhesive sheet related to the present invention is suitable for sticking to plastic products and the like that are prone to static electricity. Among them, in particular, as a surface used for the purpose of protecting the surface of an optical member (for example, a polarizing plate, a wave plate, a retardation plate, an optical compensation film, a reflection sheet, a brightness improvement film used in a liquid crystal display, etc.) A protective film is useful. Background technique [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/00B32B27/00C09J7/29
CPCC08K3/0083C08K3/0066C09J2201/602C08K5/43C08K5/34924C09J2433/006C09J7/0296C09J2433/00C09J9/02C09J2205/102C08K3/017C08K3/105C09J7/29Y10T428/265C09J2301/314C09J2301/408
Inventor 片冈贤一请井夏希春田裕宗新美健二郎天野立巳
Owner NITTO DENKO CORP
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