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Sealing sheet

A technology of sealing sheet and adhesive sheet, which is applied in the direction of engine sealing, pressure-sensitive film/sheet, film/sheet-shaped adhesive, etc. It can solve the problem that it is difficult to completely prevent water vapor from penetrating into the gap

Active Publication Date: 2014-07-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the floor panels are fixed to the main body frame by bolting, it is difficult to completely prevent moisture from penetrating into the gap between the bolts and the screw holes formed for bolting the floor panels even when the bolts are screwed into the screw holes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0214] A thermosetting room temperature liquid resin (manufactured by Kaneka Corporation, trade name "ACX022") composed of terminal allylated polyoxypropylene having an allyl group bonded to both ends of polypropylene glycol having an average molecular weight of about 28000 was used. ", 100 parts by weight) were mixed with a tackifying resin (pentaerythritol rosin, 20 parts by weight), and the mixture was heated to 100° C. and stirred for 30 minutes. It was confirmed that the mixture was transparent and the tackifier resin was dissolved in the thermosetting normal temperature liquid resin. Thereto was added a solution of a platinum / 1,3-divinyltetramethyldisiloxane complex in 2-propanol (complex concentration 3%, manufactured by N.E.CHEMCAT Corporation, trade name "3% A curing catalyst (0.05 parts by weight) consisting of Pt-VTS-IPA solution"), a hydrogen siloxane compound having an average of 5 hydrosilyl groups in one molecule (manufactured by Zhongyuan Chemical Co., Ltd., tr...

Embodiment 2

[0219] A sealing sheet was obtained in the same manner as in Example 1, except that a 25 μm thick polyethylene terephthalate film (relaxation rate 21.8%, tensile strength 185 N / 10mm) was used instead of a 20 μm thick polypropylene film .

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Abstract

The present invention provides a sealing sheet mainly composed of an adhesive sheet composed of a core film having a water vapor transmission rate of less than 7.5 g / 100 sq. in 24 hr as measured by a method according to JIS Z 0208, and a Relaxation rate of not less than 10% as measured by the following bending-stress relaxation rate measurement test, and an adhesive layer formed on both surfaces of the core film. The sealing sheet show excellent superior resistance to moisture permeation and excellent level difference absorbability.

Description

technical field [0001] The present invention relates to a sealing sheet having excellent water vapor permeation resistance and excellent level difference absorbency. Background technique [0002] For example, since electronic components, power wiring, etc. are disposed under the floor panels of the aircraft, it is necessary to insulate the floor panels from moisture and moisture so that the moisture does not seep below the floor panels. However, since the floor panel is fixed to the main body frame by bolting, it is difficult to completely prevent moisture from penetrating into the gap between the bolt and the screw hole formed for bolting the floor panel even when the bolt is screwed into the screw hole. To this end, sealing sheets are adhered to the floor panels to seal the floor panels from water and moisture. [0003] In addition, antennas for facilitating communication between the craft and remote parties are provided on the outer surfaces (external panels) of the body...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J11/00C09J171/00C09J7/38C09J7/22
CPCC09J2427/006C09J7/0264C09J2423/106C09J7/0246Y10T428/2848B32B7/12C09J2471/00C09J2467/006C09J2201/622B32B27/08C09J2201/606C09J2201/128F16J15/102C09J7/0296B32B7/06B32B27/32B32B27/36B32B2307/3065B32B2307/7244B32B2307/748B32B2605/08B32B2605/10B32B2605/18C09J7/22C09J2301/124C09J2301/302C09J2301/312C09J7/38
Inventor 甲谷龙一牟田茂树铃木理利广濑彻哉井口伸儿
Owner NITTO DENKO CORP
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