Patent Number: 
Section: claims

1. A tungsten sheet, comprising: a tungsten layer, wherein the tungsten layer includes a binder resin and a plurality of tungsten particles dispersed in the binder resin,the binder resin consists of a water-soluble acrylic acid ester,a tungsten composition amount of the tungsten layer is at least 70% by mass (wt %),an average particle diameter of the plurality of tungsten particles is more than 1 μm and less than 15 μm, andthe plurality of tungsten particles are in contact with one another in the binder resin. 2. The tungsten sheet according to claim 1, whereinthe tungsten composition amount of the tungsten layer is at least 80 wt %. 3. The tungsten sheet according to claim 1, whereinthe tungsten composition amount of the tungsten layer is at least 90 wt %. 4. The tungsten sheet according to claim 1, whereinthe average particle diameter of the plurality of tungsten particles is at least 5 μm and at most 10 μm. 5. The tungsten sheet according to claim 1, whereinthe average particle diameter of the plurality of tungsten particles is 9 μm ±10%. 6. The tungsten sheet according to claim 1, whereina thickness of the tungsten sheet is at most 0.8 mm. 7. The tungsten sheet according to claim 1, whereina thickness of the tungsten sheet is at most 0.5 mm. 8. The tungsten sheet according to claim 1, whereina weight of the plurality of tungsten particles included in the tungsten layer is at least 3000 g/m2. 9. The tungsten sheet according to claim 1, further comprising:a first substrate layer and a second substrate layer, whereinthe tungsten layer is interposed between the first substrate layer and the second substrate layer. 10. The tungsten sheet according to claim 9, whereinthe first substrate layer and the second substrate layer are made of a flexible sheet material, andthe flexible sheet material is one of a woven fabric, a non-woven fabric, paper, and a resin film. 11. The tungsten sheet according to claim 9, whereina thickness of each of the first substrate layer and the second substrate layer is less than a thickness of the tungsten layer. 12. The tungsten sheet according to claim 1, further comprising:a first substrate layer, whereinthe tungsten layer is disposed on a surface of the first substrate layer. 13. The tungsten sheet according to claim 12, whereinthe tungsten sheet includes only the first substrate layer and the tungsten layer. 14. The tungsten sheet according to claim 1, whereinthe tungsten sheet is elastic. 15. The tungsten sheet according to claim 1, whereinthe plurality of tungsten particles include pure tungsten. 16. The tungsten sheet according to claim 1, whereinthe tungsten sheet is a radioprotective sheet having an X-ray shielding rate of at least a predetermined value. 17. The tungsten sheet according to claim 16, whereinthe predetermined value is 80%. 18. Radioprotective clothing, comprising:the tungsten sheet according to claim 16. 19. A tungsten sheet, comprising: a tungsten layer, whereinthe tungsten layer includes a binder resin and a plurality of tungsten particles dispersed in the binder resin,the binder resin includes an acrylic acid ester,a tungsten composition amount of the tungsten layer is at least 95 wt %, and an average particle diameter of the plurality of tungsten particles is more than 1 μm and less than 15 μm,the plurality of tungsten particles are in contact with one another in the binder resin,a thickness of the tungsten sheet is at most 0.8 mm, andthe tungsten sheet is flexible and elastic. 20. The tungsten sheet according to claim 19, wherein a thickness of the tungsten sheet is at most 0.5 mm. 21. The tungsten sheet according to claim 1, wherein the binder resin is a water-soluble thermoplastic resin. 22. The tungsten sheet according to claim 1, wherein the tungsten particles are present in a state similar to a state of being closest packed in the binder resin. 23. The tungsten sheet according to claim 19, wherein the binder resin is a water-soluble thermoplastic resin. 24. The tungsten sheet according to claim 19, wherein the tungsten particles are present in a state similar to a state of being closest packed in the binder resin.