adhesive tape

一种粘着带、粘着剂的技术，应用在胶粘剂、薄膜/薄片状的粘合剂、压敏薄膜/薄片等方向，能够解决粘着力和防水性下降、难以进行空气去除等问题，达到防水性优异、确保粘着力、容易位置调整的效果

Active Publication Date: 2022-07-08
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 pressure-sensitive adhesive A (for the first pressure-sensitive adhesive layer) was uniformly coated on the release-treated PET film, cured, and dried to form a first pressure-sensitive adhesive layer with a thickness of 30 μm. Next, this 1st adhesive bond layer is transcribe|transferred on a polyolefin type foamed resin base material (1.8-2 times of expansion ratio).

[0097] In addition, on the PET film subjected to the mold release treatment, the previously prepared acrylic adhesive A (for the second adhesive region) was subjected to gravure printing as follows image 3 As shown, the circular island-shaped adhesive portion a was applied in a pattern in which the positions were shifted by half in a regularly arranged row, 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 portion a was set to 1.0 mm, and the width of the non-adhesive portion b wa...

Embodiment 2

[0099] Change the concavo-convex shape of the surface of the second adhesive region to the following Figure 4 An adhesive tape was produced in the same manner as in Example 1, except that the pattern in which the square island-shaped adhesive portions a were arranged at equal intervals and regularly as shown. Figure 4 The length of one side of the shown square island-shaped adhesive portion a was 1.2 mm, and the width of the non-adhesive portion b was 0.33 mm.

Embodiment 3

[0101] Change the concavo-convex shape of the surface of the second adhesive region to the following Figure 5 An adhesive tape was produced in the same manner as in Example 1, except that the pattern in which the vertical stripe-shaped adhesive portions a were arranged at equal intervals and regularly as shown. Figure 5 The width of the vertical stripe-shaped adhesive portion a of the adhesive layer 2 shown was 1.0 mm, and the width of the non-adhesive portion was 0.25 mm.

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Abstract

An adhesive tape is disclosed, which is characterized in that it is an adhesive tape having an adhesive layer on one side or both sides of a substrate 1, an adhesive layer in the case of having an adhesive layer on one side of the substrate 1, or an adhesive layer on one side of the substrate 1. When the base material 1 has adhesive layers on both surfaces, at least one of the two adhesive layers has the first adhesive layer 2 in contact with the base material 1 and the first adhesive layer 2 Next, in the second adhesive region 3 located on the surface side of the adhesive tape, the storage elastic modulus G' of the first adhesive layer 2 is higher than the storage elastic modulus G' of the second adhesive region 3 . This pressure-sensitive adhesive tape is easy to perform position adjustment and air removal at the time of sticking, and is excellent in waterproofness after sticking.

Description

technical field [0001] The present invention relates to an adhesive tape which is easy to perform position adjustment at the time of sticking, removes air, and is excellent in water repellency after sticking. Background technique [0002] Adhesive tapes are widely used in various industrial applications such as packaging, office, and building materials. In particular, in recent years, adhesive tapes have been used in portable electronic devices such as smart phones and mobile phones for attaching a protective panel of a display to a housing, and for fixing other components and modules. Furthermore, many of the adhesive tapes used for portable electronic devices and other applications are required to have waterproofness. [0003] On the other hand, high adhesive force is necessary for an adhesive tape 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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