# US 2013/0280010 A1 · Waterproof screw, sealing material, method for structure installation, and structure for structure installation

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- Number: US 2013/0280010 A1
- Document ID: US20130280010A1
- Status: Published application
- Kind: A1
- Application number: 13/994,423
- Filed: 2011-12-16
- Published: 2013-10-24
- Earliest claimed: 2010-12-16
- Assignees: Nitto Denko Corporation
- Inventors: Hiroki Fujii; Tetsuro Taga; Yoshiaki Mitsuoka
- Web page: https://patentgrep.com/patent/US20130280010A1

## CPC

- F16B 35/00: Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws ({F16B33/008 takes precedence; joining sheets or plates using screws with two separate threads F16B5/0275; using screws with adjustment sleeves F16B5/0283}; thread cutting screws F16B25/00)
- E04D 1/34: Fastenings for attaching roof-covering elements to the supporting elements
- F16B 33/004: {Sealing; Insulation (by means of washers F16B43/001)}
- F16B 43/001: {for sealing or insulation}
- E04D 2001/3467: {through apertures, holes or slots}
- E04D 2001/3473: {fastening single roof elements to the roof structure with or without indirect clamping of neighbouring roof covering elements}
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)
- E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00)

## Abstract

A waterproof screw includes a screw member including a head portion and a shank portion and a sealing material covering the circumference of the shank portion. The sealing material has a shear storage elastic modulus G′ at 25° C. and a frequency of 1 Hz of 50000 Pa or less.

## Claims

### Claim 1

A waterproof screw comprising:
a screw member including a head portion and a shank portion and
a sealing material covering the circumference of the shank portion, wherein
the sealing material has a shear storage elastic modulus G′ at 25° C. and a frequency of 1 Hz of 50000 Pa or less.

### Claim 2 (depends on 1)

The waterproof screw according to claim 1, wherein
the waterproof screw is used so as to install a structure on a roof.

### Claim 3 (depends on 1, 2)

The waterproof screw according to claims 1 and 2, wherein
the sealing material contains a butyl rubber and a liquid rubber.

### Claim 4 (depends on 3)

The waterproof screw according to claim 3, wherein
the sealing material further contains a filler and
the mixing ratio of the filler with respect to 100 parts by mass of the butyl rubber is less than 300 parts by mass.

### Claim 5 (depends on 3)

The waterproof screw according to claim 3, wherein
the sealing material further contains a tackifier.

### Claim 6

A sealing material covering a shank portion of a screw member to be used so as to seal an insertion portion for the shank portion, wherein
the sealing material has a shear storage elastic modulus G′ at 25° C. and a frequency of 1 Hz of 50000 Pa or less.

### Claim 7

A method for structure installation, installing a structure on a roof, comprising:
a structure disposing step of disposing the structure on the roof and
a structure fixing step of fixing the structure to the roof by a waterproof screw, wherein the waterproof screw comprises:
a screw member including a head portion and a shank portion and
a sealing material covering the circumference of the shank portion, and
the sealing material has a shear storage elastic modulus G′ at 25° C. and a frequency of 1 Hz of 50000 Pa or less.

### Claim 8

A structure for structure installation in which a structure is installed on a roof, wherein
the structure is disposed on the roof and
the structure is fixed to the roof by a waterproof screw, and
the waterproof screw comprises:
a screw member including a head portion and a shank portion and
a sealing material covering the circumference of the shank portion, and
the sealing material has a shear storage elastic modulus G′ at 25° C. and a frequency of 1 Hz of 50000 Pa or less.