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Pressure sensitive adhesive sheet and process for producing the same

A manufacturing method, a technology of an adhesive sheet, applied to an adhesive method using a foaming adhesive, a film/sheet-shaped adhesive, an adhesive, etc., can solve air residue, a lot of time and effort, and cannot be applied to a machine Attachment and other issues

Inactive Publication Date: 2006-12-27
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to prevent the occurrence of air residue, there is a method of applying water to the adherend or the adhesive surface in advance, but the glass scattering prevention film, decorative film, and watermark film (marking film) attached to the window are attached. ) and other large-sized adhesive sheets, it takes a lot of time and work
In addition, there is a method of using mechanical sticking without manual work to prevent the occurrence of air traps, but depending on the use of the adhesive sheet or the position and shape of the adherend, mechanical sticking may not be applicable

Method used

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  • Pressure sensitive adhesive sheet and process for producing the same
  • Pressure sensitive adhesive sheet and process for producing the same
  • Pressure sensitive adhesive sheet and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0056] Fig. 1 is a cross-sectional view of an adhesive sheet 1 according to a first embodiment of the present invention.

[0057] As shown in FIG. 1 , the PSA sheet 1 according to this embodiment is a PSA sheet constituted by laminating a substrate 2 , an PSA layer 3 , and a release material 4 . Here, the release material 4 is a release material that is peeled off when the pressure-sensitive adhesive sheet 1 is used.

[0058] The adhesive layer 3 side of the base material 2 in this embodiment is provided with a groove 21 that continues to the side end portion of the base material 2 . As will be described later, the end of the groove 21 is preferably selected so that the gas from the through passage 31 of the adhesive layer 3 passes through the groove 21 to the outside of the adhesive sheet 1, and also in order not to limit the direction of gas removal. It exists on several sides of the base material 2, and further exists on all sides (full circumference). In this embodiment,...

no. 2 Embodiment approach

[0118] exist Figure 5 The first example of the pressure-sensitive adhesive sheet according to the second embodiment of the present invention is shown in , and the second example is shown in FIG. 6 .

[0119] PSA sheets 1A and 1A' according to the second embodiment have the same configuration as the PSA sheet 1 according to the first embodiment except that the PSA layers 3A and 3A' have air bubbles passing through them.

[0120] exist Figure 5 The penetrating path in the adhesive layer 3A of the adhesive sheet 1A shown is formed by the continuous air cells penetrating the adhesive layer 3A in the thickness direction, or the air cell film or the wall between the air cells is destroyed by an external force, and can be broken in the thickness direction. The independent air cells penetrating through the adhesive layer 3A constitute. The penetrating paths in the adhesive layer 3A do not necessarily have to independently penetrate the adhesive layer 3A.

[0121] On the other han...

no. 3 Embodiment approach

[0135] Figure 7 It is a cross-sectional view of an adhesive sheet 1B according to a third embodiment of the present invention.

[0136] like Figure 7 As shown, the PSA sheet 1B according to this embodiment is a PSA sheet in which a base material 2B and an PSA layer 3B are laminated.

[0137] The base material 2B in this embodiment is comprised from the surface base material 22B, and the foam layer 23B which consists of foams. Examples of the material of the surface substrate 22B include, but are not particularly limited to, resin films, metal films, metal-deposited resin films, paper, nonwoven fabrics, and laminates thereof. The thickness of the surface substrate 22B is usually about 1 to 500 μm, preferably about 3 to 300 μm.

[0138] On the other hand, as the foam constituting the foam layer 23B, for example, poly(meth)acrylate, polystyrene, polyurethane, polyethylene, polypropylene, polyvinyl chloride, cellulose acetate, rubber, organic A foam made of resin such as sil...

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Abstract

A substrate 2 having provided in a pressure-sensitive adhesive layer 3 side thereof recesses 21 that continue as far as side edges of the substrate 2, and a pressure-sensitive adhesive layer 3 in which are formed a plurality of penetrating passages 31 that penetrate through the pressure-sensitive adhesive layer 3 in a thickness direction are laminated together such that the recesses 21 in the substrate 2 and the penetrating passages 31 in the pressure-sensitive adhesive layer 3 communicate with one another, thus obtaining a pressure-sensitive adhesive sheet 1. According to this pressure-sensitive adhesive sheet 1, air entrapment and blistering can be prevented or eliminated while securing adequate adhesive strength and with no marring of the appearance of the pressure-sensitive adhesive sheet.

Description

technical field [0001] The present invention relates to a PSA sheet capable of preventing or removing air trapping or blisters and a method for producing such a PSA sheet. Background technique [0002] When a PSA sheet is attached to an adherend by hand, air may remain between the adherend and the adhesive surface, impairing the appearance of the PSA sheet. Such residual air tends to occur particularly when the area of ​​the PSA sheet is large. [0003] In order to solve the problem of the appearance of the adhesive sheet caused by the residual air, another adhesive sheet is attached instead of the original adhesive sheet, or the adhesive sheet is peeled off once and reattached, or the adhesive sheet is inserted with a needle. The expansion part opens holes to release air. However, in the case of affixing an alternative adhesive sheet, not only labor is required, but also the cost is increased. In addition, when the adhesive sheet is reattached, the adhesive sheet is damag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J7/22C09J5/08C09J7/38C09J201/00
CPCC09J7/0246C09J7/026C09J7/38C09J7/22Y10T428/249953C09J2301/18
Inventor 加藤挥一郎歌川哲之大类知生
Owner LINTEC CORP
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