# US 10,319,485 B2 · Radioprotective unwoven fabric and fiber product

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- Number: US 10,319,485 B2
- Document ID: US10319485B2
- Status: Granted
- Kind: B2
- Application number: 15/793,744
- Filed: 2017-10-25
- Published: 2018-05-10
- Granted: 2019-06-11
- Earliest claimed: 2016-11-04
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Kazushige Sugita; Masahiro Matsumoto; Tomohiro Kanazawa; Tsuyoshi Terada
- Web page: https://patentgrep.com/patent/US10319485B2

## CPC

- G21F 3/02: Clothing
- G21F 1/08: Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals
- G21F 1/125: {comprising metals}
- G21F: PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means A61K8/00, A61Q17/04; in cosmonautic vehicles B64G1/54; combined with a reactor G21C11/00; combined with X-ray tubes H01J35/16; combined with X-ray apparatus H05G1/02)

## Abstract

A radioprotective unwoven fabric is a sheet in which metal fibers are three-dimensionally and randomly stacked, the metal fibers each comprising a metal material having a specific gravity higher than a specific gravity of lead. The metal fibers may comprise a tungsten wire.

## Claims

### Claim 1

A radioprotective unwoven fabric, which is
a sheet in which metal fibers are three-dimensionally and randomly stacked, the metal fibers each comprising a metal material having a specific gravity higher than a specific gravity of lead,
wherein the metal fibers make up the radioprotective unwoven fabric, and each of the metal fibers consists of metal wire.

### Claim 2 (depends on 1)

The radioprotective unwoven fabric according to claim 1,
wherein the metal fibers comprise a tungsten wire.

### Claim 3 (depends on 2)

The radioprotective unwoven fabric according to claim 2,
wherein the metal fibers further comprise a molybdenum wire.

### Claim 4 (depends on 1)

The radioprotective unwoven fabric according to claim 1,
wherein the metal fibers are only tungsten wires.

### Claim 5 (depends on 1)

The radioprotective unwoven fabric according to claim 1, which is
felt.

### Claim 6 (depends on 1)

The radioprotective unwoven fabric according to claim 1,
wherein each of the metal fibers is not a monofilament.

### Claim 7 (depends on 1)

The radioprotective unwoven fabric according to claim 1,
wherein each of the metal fibers has a diameter of at most 1 mm and a length of at least 20 mm and at most 80 mm.

### Claim 8 (depends on 1)

A fiber product, which is
obtained by sewing the radioprotective unwoven fabric according to claim 1.

### Claim 9

A radioprotective product, which is
a quilt including a front cloth, a back cloth, and padding including metal fibers and disposed between the front cloth and the back cloth,
wherein the metal fibers are three-dimensionally and randomly stacked,
the metal fibers each comprise a metal material having a specific gravity higher than a specific gravity of lead, and
the metal fibers are woolly and make up the radioprotective unwoven fabric, and each of the metal fibers consists of metal wire.

### Claim 10 (depends on 9)

The radioprotective product according to claim 9,
wherein the metal fibers comprise a tungsten wire.

### Claim 11 (depends on 10)

The radioprotective product according to claim 10,
wherein the metal fibers further comprise a molybdenum wire.

### Claim 12 (depends on 9)

The radioprotective product according to claim 9,
wherein the metal fibers are only tungsten wires.

### Claim 13 (depends on 9)

The radioprotective product according to claim 9,
wherein each of the metal fibers is not a monofilament.

### Claim 14 (depends on 9)

The radioprotective product according to claim 9,
wherein each of the metal fibers has a diameter of at most 1 mm and a length of at least 20 mm and at most 80 mm.