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Adhesive tape

A technology of adhesive tape and adhesive surface, which is applied in the direction of adhesives, film/sheet adhesives, synthetic resin layered products, etc., and can solve the problems of easy damage to power cables

Active Publication Date: 2021-03-16
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the power cable 104 is prone to damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] [Preparation of PTFE sheets]

[0107] PTFE powder (POLYFLON PTFE M-12 manufactured by Daikin Industry Co., Ltd.) was introduced into a cylindrical mold, and preformed under the conditions of a temperature of 23° C., a pressure of 60 MPa, and a pressure application time of 1 hour. Next, the formed preform was taken out from the mold, and fired at 375° C. for 3 hours to obtain a cylindrical PTFE block with a height of 100 mm and an outer diameter of 50 mm. Next, the obtained PTFE block was cut with a cutting lathe to obtain a PTFE sheet with a thickness of 60 μm. In this way, a PTFE sheet used as a base material was prepared.

[0108] [Na treatment for PTFE sheets]

[0109] The prepared PTFE sheet was dipped in a treatment solution containing metallic sodium (FluoroBonder (registered trademark) manufactured by TECHNOS Co., Ltd.), pulled up, and washed with acetone. Next, after immersing in pure water to wash, it was dried at 100° C. for 1 minute to perform Na treatment...

Embodiment 2

[0115] Except having changed the thickness of the PTFE sheet, it carried out similarly to Example 1, and produced the adhesive tape with a thickness of 50 micrometers.

Embodiment 3

[0117] Except having changed the thickness of the PTFE sheet, it carried out similarly to Example 1, and produced the adhesive tape with a thickness of 130 micrometers.

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Abstract

The adhesive tape of the present invention comprises a fluororesin substrate and a silicone-based pressure-sensitive adhesive layer disposed on one surface of the substrate, wherein the surface of thesilicone-based adhesive layer on the reverse side from the substrate is a adhesive surface, the adhesive tape having a thickness of 50 [mu]m or larger. After a 10-cycle reciprocating friction test, the adhesive surface has an adhesive force of 4.0 N / 19 mm or greater in application to the other surface of the substrate, the friction test being conducted in accordance with the test method for coefficient of friction defined in JIS K7125:1999 using a sliding piece in which the surface to be in contact with a surface to be tested is covered with fabric configured of cotton fibers only (for friction) defined in JIS L0803:2011, the surface to be tested being the other surface of the substrate. The adhesive tape is suitable for various applications where the wound state, after actual winding, isrequired to be stably maintained, such as, for example, power cable repairing applications in crude-oil drilling (ESP drilling) fields where an electric submersible pump is used.

Description

technical field [0001] The present invention relates to an adhesive tape comprising a fluororesin base material. Background technique [0002] One of artificial oil recovery methods in oilfields is an oil recovery method (ESP oil recovery method) using an electric submersible pump (Electric Submersible Pump). like Figure 4 As described above, in the ESP production method, the ESP assembly 108 including the pump 105, the suction port 106, and the motor 107 is inserted into the well 101 extending deeply underground. The crude oil 102 in the well 101 is pumped up to the surface through a pump 105 driven by a motor 107 through a suction pipe 109 . The control device 103 of the electric motor 107 and the electric motor 107 are usually connected through a power cable 104 arranged on the outer peripheral surface of the oil suction pipe 109 and the ESP assembly 108 . [0003] The interior of the well 101, especially the deepest part where the ESP assembly 108 is inserted, is in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/24B32B27/00B32B27/30B65D63/10C09J7/38C09J7/40C09J183/04G01N19/02
CPCC09J7/24C09J183/04C09J2427/006C09J2483/00C09J7/30C09J2301/312C09J7/245C09J7/38C09J7/40B32B27/30Y10T428/14C09J2301/122Y10T428/1429
Inventor 高村优一高山嘉也
Owner NITTO DENKO CORP