# US 10,370,568 B2 · Double-sided pressure-sensitive adhesive tape for fixing aircraft parts

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- Number: US 10,370,568 B2
- Document ID: US10370568B2
- Status: Granted
- Kind: B2
- Application number: 15/108,018
- Filed: 2014-12-24
- Published: 2016-11-10
- Granted: 2019-08-06
- Earliest claimed: 2013-12-27
- Assignees: Mitsubishi Chemical Corporation
- Applicants: The Nippon Synthetic Chemical Industry Co., Ltd.
- Inventors: Akira Ikebata; Junichiro Sakai; Yuta Kawazoe
- Web page: https://patentgrep.com/patent/US10370568B2

## CPC

- C09J 7/29: Laminated material (metallised plastics C09J7/22)
- C09J 7/21: Paper; Textile fabrics
- C09J 7/22: Plastics; Metallised plastics
- C09J 7/241: {Polyolefin, e.g.rubber}
- C09J 7/255: {Polyesters}
- C09J 7/38: Pressure-sensitive adhesives [PSA]
- C09J 7/385: {Acrylic polymers}
- C09J 7/405: {characterised by the substrate of the release liner}
- C09J 133/04: Homopolymers or copolymers of esters {(C09J143/04 takes precedence)}
- C09J 133/08: Homopolymers or copolymers of acrylic acid esters
- C09J 201/00: Adhesives based on unspecified macromolecular compounds
- C08L 2201/02: Flame or fire retardant/resistant
- C09J 2203/342: for flying splice applications
- C09J 2301/124: the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
- C09J 2301/312: parameters being the characterizing feature
- C09J 2400/263: in the substrate
- C09J 2423/006: in the substrate
- C09J 2433/00: Presence of (meth)acrylic polymer
- C09J 2467/006: in the substrate
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

To provide a double-sided pressure-sensitive adhesive tape for fixing aircraft parts which is excellent in terms of hand tearability, flame retardance, and removability in a well-balanced manner. A double-sided pressure-sensitive adhesive tape for fixing aircraft parts which is a double-sided pressure-sensitive adhesive tape having pressure-sensitive adhesive layers on both sides of a substrate having hand tearability, characterized in that when S represents an pressure-sensitive adhesive strength of one pressure-sensitive adhesive layer (I) and W represents an pressure-sensitive adhesive strength of the other pressure-sensitive adhesive layer (II), the W is 2-20 N/25 mm and S/W is 1.5 or larger, and the double-sided pressure-sensitive adhesive tape passes the flammability test as provided for in FAR25.853(a)app.F.Part1(a)(1)ii.

## Claims

### Claim 1

A double-sided pressure-sensitive adhesive tape for fixing aircraft parts comprising a first pressure-sensitive adhesive layer (I) on a first side of a substrate having hand tearability and a second pressure-sensitive adhesive layer (II) on a second side of the substrate, wherein when S represents an pressure-sensitive adhesive strength of the first pressure-sensitive adhesive layer (I) and W represents an pressure-sensitive adhesive strength of the second pressure-sensitive adhesive layer (II), the W is 2-20 N/25 mm and S/W is 1.5 or larger, and the double-sided pressure-sensitive adhesive tape passes the flammability test as provided for in FAR25.853(a)app.F.Part1(a)(1)ii,
the first pressure-sensitive adhesive layer (I) contains a flame the second, and pressure-sensitive adhesive layer (II) contains no flame retardant, wherein the gel fraction of the first pressure-sensitive adhesive layer (I) is different from the gel fraction of the second pressure-sensitive adhesive layer (II), wherein the gel fraction of the second pressure-sensitive adhesive layer is 50 to 90%.

### Claim 2 (depends on 1)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 1, wherein the substrate is an easy to tear film.

### Claim 3 (depends on 2)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 2, wherein the easy to tear film is made of a material which is a polyester film or a polyolefin film.

### Claim 4 (depends on 2)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 2, wherein the easy to tear film is a biaxially stretched film in which the transverse-direction stretch ratio is higher than the machine-direction stretch ratio.

### Claim 5 (depends on 2)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 2, wherein the easy to tear film is a laminate of a biaxially stretched film and a monoaxially stretched film.

### Claim 6 (depends on 1)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 1, wherein the substrate is a substrate which comprises a flat yarn cloth.

### Claim 7 (depends on 6)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 6, wherein the substrate comprising a flat yarn cloth is a laminated film in which a flat yarn cloth and a plastic film are laminated.

### Claim 8 (depends on 1)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 1, wherein the first and the second pressure sensitive adhesive layers comprise an acrylic resin.

### Claim 9 (depends on 1)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 1, wherein the content of the flame retardant is 70% by weight or less based on the total weight of the pressure-sensitive adhesive layers (I) and (II).

### Claim 10 (depends on 1)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 1, wherein a release liner made of paper is coated on the surface of at least one of the pressure-sensitive adhesive layers, the surface is on the reverse side from the substrate, and the base paper of the release liner has a basis weight of 40-120 g/m2.

### Claim 11 (depends on 1)

The double-sided pressure-sensitive adhesive tape for fixing aircraft parts according to claim 1, wherein the gel fraction of the pressure-sensitive adhesive layer (I) is 20 to 60%.