We claim:
1. A method for manufacturing the DP-bioglass to use in dental fracture repair via the carbon dioxide lasre, the method comprising the steps:
using an oxide material including a sodium, calcium, silicon and phosphate acid salts composition;
triturating the oxide material and drying it;
heating the oxide material and rapid freezing; and
drying the oxide material mixing with a phosphoric acid to react the DP-bioglass.
2. The method according to claim 1, wherein said sodium, calcium, silicon and phosphate dehydrogenase composition are a sodium carbonate(Na2CO3), calcium carbonate(CaCO3), silicon dioxide(SiO2) and calcium phosphate(Ca(PO4)2).
3. The method according to claim 1, wherein said sodium, calcium, silicon and phosphate dehydrogenase composition is made of the composition ratio of Na2OCaO SiO2PO5 being 8.4%-40.6%-39.0%-12%.
4. The method according to claim 1, wherein triturating the oxide material further comprises a step:
adding a organic solvent.
5. The method according to claim 4, wherein said organic solvent is a ethyl alcohol.
6. The method according to claim 4, wherein adding organic solvent is 80 to 120 milliliters.
7. The method according to claim 1, wherein triturating time of said oxide material is 6 to 10 hours.
8. The method according to claim 1, wherein said triturating the oxide material and drying step heats at 70 to 90 C. in drying process.
9. The method according to claim 8, wherein drying step heats 8 hours.
10. The method according to claim 1, wherein said heating the oxide material step is at 1410 to 1450 C., 1 to 2 hours.
11. The method according to claim 1, wherein said rapid freezing step is at 70 to 90 C., 24 hours.
12. The method according to claim 1, wherein said drying the oxide material mixing with a phosphoric acid step uses a 400 mesh sieve to get a particle required for mixing with the phosphoric acid.
13. The method according to claim 1, wherein said phosphoric acid concentration is 65 w.t. % and adds 4 to 6 milliliters.
14. The method according to claim 1, wherein said DP-bioglass is a colloidal material.
15. The method according to claim 14, wherein said DP-bioglass fills in cracks of tooth and irradiates a carbon dioxide lasre.
16. The method according to claim 15, wherein said carbon dioxide lasre uses 4 to 6 Watts, 0.6 to 0.8 milliliters diameter of beam.
17. The method according to claim 15, wherein said irradiation time of carbon dioxide lasre is 4 to 6 seconds.
18. The method according to claim 15, wherein said total irradiation time of carbon dioxide lasre is 50 to 60 seconds.
19. The method according to claim 15, wherein said carbon dioxide lasre irradiating DP-bioglass distance is 0.5 to 1 milliliters.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A heavy duty tire comprising a carcass which extends from a tread portion to each of bead cores of bead portions through sidewall portions, and a belt layer which comprises a plurality of belt plies including a belt ply having the maximum width and which is disposed radially outward of said carcass in said tread portion, wherein
a tread rubber disposed in said tread portion comprises a cap rubber layer which provides the outer surface of said tread portion, and a base rubber layer disposed radially inward of said cap rubber layer, and each of the axially outer ends of said tread rubber terminates radially inward beyond a lateral base line drawn in the axial direction of the tire from an axially outer end of said belt ply having the maximum width,
a sidewall rubber disposed in each of said sidewall portions has a radially outer end extending radially outward beyond said lateral base line to cover the axially outer end of said tread rubber,
on said lateral base line, the LaLt ratio of a thickness La of said base rubber layer to a distance Lt from the axially outer end of said belt ply having the maximum width to the outer surface of the tire is from 0.6 to 0.8, the LbLt ratio of a thickness Lb of said cap rubber layer to said distance Lt is from 0.1 to 0.3, and the LsLt ratio of a thickness Ls of said sidewall rubber to said distance Lt is from 0.1 to 0.2,
on a normal line extending from the axially outer end of said belt ply having the maximum width to the tread outer surface, the TaTt ratio of a thickness Ta of said base rubber layer to a distance Tt from the axially outer end of said belt ply having the maximum width to the tread outer surface is from 0.35 to 0.45, and the CbTb ratio of a thickness Cb of said cap rubber layer in a tread center region, the center line of which is the equator of the tire and which has a width of 50% of the tread width, to a thickness Tb of said cap rubber layer on said normal line is more than 1.0 and less than 1.6.
2. The heavy duty tire of claim 1, wherein said base rubber layer has a loss tangent of 0.035 to 0.055, said cap rubber layer has a loss tangent of 0.070 to 0.090, and said sidewall rubber has a loss tangent of 0.045 to 0.090.
3. The heavy duty tire of claim 1, wherein said base rubber layer has a Shore A hardness of 62 to 66, said cap rubber layer has a Shore A hardness of 64 to 68, said sidewall rubber has a Shore A hardness of 52 to 56, and the hardness of said base rubber layer is larger than that of said sidewall rubber and is smaller than that of said cap rubber layer.
4. The heavy duty tire of claim 2, wherein said base rubber layer has a Shore A hardness of 62 to 66, said cap rubber layer has a Shore A hardness of 64 to 68, said sidewall rubber has a Shore A hardness of 52 to 56, and the hardness of said base rubber layer is larger than that of said sidewall rubber and is smaller than that of said cap rubber layer.