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Adhesive tape

An adhesive tape and adhesive technology, applied in the direction of adhesives, film/sheet adhesives, pressure-sensitive films/sheets, etc., can solve the problems of decreased adhesion and water resistance, difficulty in air removal, etc., to achieve water resistance Excellent, secure adhesion, easy position adjustment effect

Active Publication Date: 2019-12-27
TERAOKA SEISAKUSHO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this adhesive tape, as in the adhesive sheet of Patent Document 1, if the proportion of the adhesive portion is increased, air removal becomes difficult, and if the proportion of the non-adhesive portion is increased, the adhesive force and water resistance will decrease.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] The previously prepared acrylic adhesive A (for the first adhesive layer) was uniformly applied on the release-treated PET film, cured, and dried to form a first adhesive layer with a thickness of 30 μm. Next, the first pressure-sensitive adhesive layer is transferred onto a polyolefin-based foamed resin substrate (1.8 to 2 times the expansion ratio).

[0097] In addition, the acrylic adhesive A (for the second adhesive area) prepared previously was gravure printed on the PET film subjected to mold release treatment as follows: image 3 As shown, the circular island-shaped adhesive part a was applied in a pattern in which half-shifted rows were regularly arranged, cured, and dried to form a second adhesive region with a thickness of 3 μm. image 3 The diameter of the shown circular island-shaped adhesive part a is set to 1.0 mm, and the width of the non-adhesive part b is set to 0.25 mm. Then, the second adhesive region was transferred onto the first adhesive layer, an...

Embodiment 2

[0099] Change the uneven shape of the surface of the 2nd adhesive area to the following Figure 4 As shown, except the pattern in which the square island-shaped adhesive part a was regularly arranged at equal intervals, it carried out similarly to Example 1, and produced the adhesive tape. Figure 4 The length of one side of the shown square island-shaped adhesive part a was 1.2 mm, and the width of the non-adhesive part b was 0.33 mm.

Embodiment 3

[0101] Change the uneven shape of the surface of the 2nd adhesive area to the following Figure 5 The pressure-sensitive adhesive tape was manufactured in the same manner as in Example 1, except that the pattern in which the vertical stripe-shaped adhesive parts a were regularly arranged at regular intervals was carried out as shown. Figure 5 The width of the vertically stripe-shaped adhesive portion a of the adhesive layer 2 shown is 1.0 mm, and the width of the non-adhesive portion is 0.25 mm.

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Abstract

Disclosed is a pressure-sensitive adhesive tape which comprises a base 1 and one or two pressure-sensitive adhesive layers disposed on one or both surfaces thereof, characterized in that either the pressure-sensitive adhesive layer in the case where the base 1 has a pressure-sensitive adhesive layer on only one surface or at least one of the two pressure-sensitive adhesive layers in the case wherethe base 1 has two pressure-sensitive adhesive layers on both surfaces comprises a first pressure-sensitive adhesive layer 2, which is in contact with the base 1, and second pressure-sensitive adhesive regions 3, which are in contact with the first pressure-sensitive adhesive layer 2 and are located on the surface side in the pressure-sensitive adhesive tape and that the first pressure-sensitiveadhesive layer 2 has a higher storage modulus G' than the second pressure-sensitive adhesive regions 3. This pressure-sensitive adhesive tape facilitates positional adjustment and air removal during application and has an excellent waterproof performance after the application.

Description

technical field [0001] The present invention relates to an adhesive tape that facilitates positional adjustment and air removal at the time of sticking, and is excellent in waterproofness after sticking. Background technique [0002] Adhesive tapes are widely used in various industrial applications such as packaging, office use, and building materials. Especially in recent years, adhesive tapes are also used in portable electronic devices such as smartphones and mobile phones to bond the protective panel of the display to the casing, and to fix other components and modules. Furthermore, waterproofness is often required for adhesive tapes used for portable electronic devices and other applications. [0003] On the other hand, high adhesive force is required for adhesive tapes used for component fixing applications. However, if the adhesive force is high, it may be difficult to adjust the position of the adhesive tape on the adherend, or air may be easily trapped between the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J7/22C09J201/00
CPCC09J7/38C09J2301/208C09J2301/204C09J2400/243C09J2203/326C09J7/22C09J201/00C09J2301/206C09J2301/12C09J2301/312C09J7/385C09J7/26C09J2433/00C09J2467/00C09J2483/00
Inventor 丹羽理石川和树土屋靖史
Owner TERAOKA SEISAKUSHO
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