Brominated flame retardant determining method, brominated flame retardant determining apparatus, recycling method, and recycling apparatus

1. A brominated flame retardant determining method, comprising:

emitting light to a determination target object composed of resin;

receiving reflected light from the determination target object emitted with the light;

calculating an absorption spectrum of the determination target object based on the reflected light; and

determining whether or not a brominated flame retardant is contained in the determination target object based on, in the absorption spectrum, an absorption spectrum in a wavelength band of 1.40 μm or more and 2.50 μm or less, wherein

it is determined whether or not the brominated flame retardant is contained in the determination target object based on, in the absorption spectrum in the wavelength band of 1.40 μm or more and 2.50 μm or less, an absorption spectrum of at least one of wavelength bands including a wavelength band of 1.42 μm or more and 1.44 μm or less, a wavelength band of 1.45 μm or more and 1.47 μm or less, a wavelength band of 1.66 μm or more and 1.68 μm or less, a wavelength band of 1.72 μm or more and 1.74 μm or less, a wavelength band of 1.92 μm or more and 1.94 μm or less, a wavelength band of 2.11 μm or more and 2.12 μm or less, a wavelength band of 2.17 μm or more and 2.20 μm or less, and a wavelength band of 2.31 μm or more and 2.34 μm or less.

2. The brominated flame retardant determining method according to claim 1 , wherein

the determination target object is composed of ABS resin, and

in determining whether or not the brominated flame retardant is contained in the determination target object, determining whether or not the brominated flame retardant is contained in the determination target object based on, in the absorption spectrum, the absorption spectrum of at least one of the wavelength band of 1.42 μm or more and 1.44 μm or less and the wavelength band of 1.45 μm or more and 1.47 μm or less.

3. The brominated flame retardant determining method according to claim 1 , wherein

the brominated flame retardant is a bromine compound.

4. The brominated flame retardant determining method according to claim 1 , wherein

the brominated flame retardant is one of PBB, PBDE, HBCDD, TBBPA, TBBPA-bis, and a TBBPA derivative.

5. The brominated flame retardant determining method according to claim 1 , wherein

in the receiving the reflected light,

dispersing the reflected light from the determination target object emitted with the light, for each of the wavelength bands, and

the reflected light being dispersed is received for each of the wavelength bands.

6. A brominated flame retardant determining method, comprising:

emitting light to a determination target object composed of resin;

receiving reflected light from the determination target object emitted with the light;

calculating an absorption spectrum of the determination target object based on the reflected light; and

determining whether or not a brominated flame retardant is contained in the determination target object based on, in the absorption spectrum, an absorption spectrum in a wavelength band of 1.40 μm or more and 2.50 μm or less, wherein

in determining whether or not the brominated flame retardant is contained in the determination target object,

determining a type of the resin of the determination target object,

determining priorities of the wavelength bands based on a result of the determination of the type of the resin of the determination target object, and

determining whether or not the brominated flame retardant is contained in the determination target object based on an absorption spectrum in the wavelength in accordance with the priorities of the wavelength bands.

7. A recycling method, comprising:

conveying a plurality of determination target objects each composed of resin;

thereafter, applying the brominated flame retardant determining method according to claim 1 to the determination target objects which have conveyed; and

thereafter, selectively separating the determination target objects into a determination target object determined to contain a brominated flame retardant and a determination target object determined to be free of the brominated flame retardant, to thereby reuse the determination target object determined to be free of the brominated flame retardant.

8. A brominated flame retardant determining apparatus, comprising:

an emission unit that emits light to a determination target object composed of resin;

a light receiving unit that receives reflected light from the determination target object emitted with the light; and

an arithmetic processing unit that calculates an absorption spectrum of the determination target object based on the reflected light, wherein

the arithmetic processing unit determines whether or not a brominated flame retardant is contained in the determination target object based on, in the absorption spectrum, an absorption spectrum in a wavelength band of 1.40 μm or more and 2.50 μm or less, wherein

the arithmetic processing unit determines whether or not a brominated flame retardant is contained in the determination target object based on, in the absorption spectrum in the wavelength band of 1.40 μm or more and 2.50 μm or less, an absorption spectrum of at least one of wavelength bands including a wavelength band of 1.42 μm or more and 1.44 μm or less, a wavelength band of 1.45 μm or more and 1.47 μm or less, a wavelength band of 1.66 μm or more and 1.68 μm or less, a wavelength band of 1.72 μm or more and 1.74 μm or less, a wavelength band of 1.92 μm or more and 1.94 μm or less, a wavelength band of 2.11 μm or more and 2.12 μm or less, a wavelength band of 2.17 μm or more and 2.20 μm or less, and a wavelength band of 2.31 μm or more and 2.34 μm or less.

9. The brominated flame retardant determining apparatus according to claim 8 , wherein

the determination target object is composed of ABS resin, and

the arithmetic processing unit determines whether or not the brominated flame retardant is contained in the determination target object based on, in the absorption spectrum, an absorption spectrum in at least one of the wavelength band of 1.42 μm or more and 1.44 μm or less and the wavelength band of 1.45 μm or more and 1.47 μm or less.

10. The brominated flame retardant determining apparatus according to claim 8 , wherein

the brominated flame retardant is a bromine compound.

11. The brominated flame retardant determining apparatus according to claim 8 , wherein

the brominated flame retardant is one of PBB, PBDE, HBCDD, TBBPA, TBBPA-bis, and a TBBPA derivative.

12. The brominated flame retardant determining apparatus according to claim 8 , further comprising

a diffraction grating that disperses the reflected light from the determination target object emitted with the light for each of the wavelength bands, wherein

the light receiving unit receives the reflected light being dispersed by the diffraction grating, for each of the wavelength bands.

13. A brominated flame retardant determining apparatus, comprising:

an emission unit that emits light to a determination target object composed of resin;

a light receiving unit that receives reflected light from the determination target object emitted with the light; and

an arithmetic processing unit that calculates an absorption spectrum of the determination target object based on the reflected light, wherein

the arithmetic processing unit determines whether or not a brominated flame retardant is contained in the determination target object based on, in the absorption spectrum, an absorption spectrum in a wavelength band of 1.40 μm or more and 2.50 μm or less, wherein

the arithmetic processing unit comprises:

a resin determining unit that determines a type of the resin of the determination target object;

a priority determining unit that determines priorities of the wavelength bands based on a result of the determination of the resin determining unit; and

a determining unit that determines whether or not the brominated flame retardant is contained in the determination target object based on an absorption spectrum in the wavelength band in accordance with the priorities of the wavelength bands determined by the priority determining unit.

14. A recycling apparatus, comprising:

a conveying unit that conveys a plurality of determination target objects each composed of resin;

the brominated flame retardant determining apparatus according to claim 8 ; and

a selectively separating unit that selectively separates the determination target objects into a determination target object determined to be containing a brominated flame retardant and a determination target object determined to be free of the brominated flame retardant.