Blasting abrasive and manufacturing method thereof, blasting method, and blasting apparatus
A blasting abrasive includes a particle of hot melt resin and abrasive grains to be firmly fixed to the particle, a blasting method further includes preparing a blasting abrasive including particles of hot melt resin and abrasive grains to be firmly fixed to the particles, heating gas, and injecting both the blasting abrasive and the heated gas.
1 . A blasting abrasive to be injected to a workpiece together with gas, the blasting abrasive comprising:
a particle consisting of hot melt resin; and
abrasive grains to be firmly fixed to the particle,
wherein a change in rubber hardness of the hot melt resin is 1.3 (A) or more with respect to a temperature change of 1° C. in the temperature range of 20° C. to 50° C., and
wherein the abrasive grains include abrasive grains firmly fixed in such a way as to be wholly buried in the particle, and the abrasive grains firmly fixed in such a way as to be wholly buried are distributed more in a vicinity of the surface of the particle than in a center of the particle.
2 . The blasting abrasive according to claim 1 , wherein the hot melt resin includes any one of ethylene vinyl acetate and polyurethane as a main component.
3 . The blasting abrasive according to claim 1 , wherein the abrasive grains include abrasive grains firmly fixed in such a way as to be partially buried from a surface of the particle to an inside of the particle in a radial direction thereof, and exposed from the surface of the particle to an outside of the particle in the radial direction thereof.