Method for recycling recovered discs, flame retardant resin composition and flame retardant resin molded products
A recovered disc of a structure in which plural disc substrates are bonded together with an adhesive, is to be recycled. To this end, there is provided a recycling method for a recovered disc wherein a recovered disc, containing a material of at least one coating film, out of a reflective film, a recording film, a protective film and an ink film, deposited on a disc substrate in addition to an adhesive used for bonding a plurality of the disc substrates together, is used as a starting material for preparing a flame retardant resin composition or resin molded product.
1. A recycling method
using a recovered disc, containing a material of at least one coating film, out of a reflective film, a recording film, a protective film and an ink film, deposited on a disc substrate in addition to an adhesive used for bonding a plurality of the disc substrates together, as a starting material for preparing a flame retardant resin composition or resin molded product,
wherein the flame retardant resin composition or resin molded product contains said at least one coating film in addition to said adhesive used for bonding.
2. The recycling method for a recovered disc according to claim 1 wherein said recovered discs are contained in a proportion of 5 to 90 wt % in said flame retardant resin composition or resin molded product.
3. The recycling method for a recovered disc according to claim 1 wherein said recovered disc containing at least one of a hydroxyl group, a phosphoric acid (phosphate) group, a diazonium salt group, an iodonium salt group and a carboxyl group, as said adhesive, is used as a starting material for preparing a flame retardant resin composition or resin molded product.
4. The recycling method for a recovered disc according to claim 3 wherein the proportion of said adhesive contained in said flame retardant resin composition or resin molded product ranges between 0.005 wt % to 20 wt %.
5. The recycling method for a recovered disc according to claim 1 wherein at least one of PC (polycarbonate), ABS (acrylonitrile butadiene styrene copolymer), AS (acrylonitrile styrene copolymer), PS (polystyrene), HIPS (high-impact polystyrene), a PC/ABS alloy, a PC/HIPS alloy, a PC/PP (polypropylene) alloy, a PC/PE (polyethylene) alloy, a PC/PMMA (methyl polymethacrylate), PC/PBT (polybutylene terephthalate) alloy and a PC/nylon alloy, is contained along with said recovered discs.
6. A flame retardant resin composition containing at least one coating material in addition to an adhesive used for bonding is prepared from a recovered disc used as a starting material, said recovered disc containing, along with the adhesive used for bonding a plurality of disc substrates together, said at least one coating materials comprising one of a reflective film, a recording film, a protective film and an ink film, formed on said disc substrates.
7. The flame retardant resin composition according to claim 6 wherein 5 to 90 wt % of said recovered discs are contained in the starting material.
8. The flame retardant resin composition according to claim 6 wherein the recovered disc containing at least one of a hydroxyl group, phosphoric acid (phosphate) group, a sulfonium salt group, a diazonium salt group, an iodonium salt group and a carboxyl group, as said adhesive, is used as a starting material.
9. The flame retardant resin composition according to claim 8 wherein the content of said adhesive is 0.005 to 20 wt %.
10. The flame retardant resin composition according to claim 6 wherein at least one of a PC (polycarbonate), ABS (acrylonitrile butadiene styrene copolymer), AS (acrylonitrile styrene copolymer), PS (polystyrene), HIPS (high-impact polystyrene), a PC/ABS alloy, a PC/PS alloy, a PC/HIPS alloy, a PC/PP (polypropylene) alloy, a PC/PE (polyethylene) alloy, a PC/PMMA (methyl polymethacrylate) alloy, a PC/PET (polyethylene terephthalate) alloy, a PC/PBT (polybutylene terephthalate) alloy and a PC/nylon alloy, is contained in the starting material for said flame retardant resin composition or resin molded product along with said recovered discs.
11. A flame retardant resin molded product containing at least one coating material in addition to an adhesive used for bonding is prepared from a recovered disc used as a starting material, said recovered disc containing, along with the adhesive used for bonding a plurality of disc substrates together, said at least one coating material comprising one of a reflective film, a recording film, a protective film and an ink film, formed on said disc substrates.
12. The flame retardant resin molded product according to claim 11 wherein 5 to 90 wt % of said recovered discs are contained in the starting material.
13. The flame retardant resin molded product according to claim 11 wherein the recovered disc containing at least one of a hydroxyl group, phosphoric acid (salt) group, a sulfonium salt group, a diazonium salt group, an iodonium salt group and a carboxyl group, as said adhesive, is used as a starting material.
14. The flame retardant resin molded product according to claim 13 wherein the content of said adhesive is 0.005 to 20 wt %.
15. The flame retardant resin molded product according to claim 11 wherein at least one of a PC (polycarbonate), ABS (acrylonitrile butadiene styrene copolymer), AS (acrylonitrile styrene copolymer), PS (polystyrene), HIPS (high-impact polystyrene), a PC/ABS alloy, a PC/PS alloy, a PC/HIPS alloy, a PC/PP (polypropylene) alloy, a PC/PE (polyethylene) alloy, a PC/PMMA (methyl polymethacrylate) alloy, a PC/PET (polyethylene terephthalate) alloy, a PC/PBT (polybutylene terephthalate) alloy and a PC/nylon alloy, is contained along with said recovered discs.
16. The recycling method for a recovered disc according to claim 1 , wherein at least one of a halogen-based flame retarder, a phosphorus-based flame retarder, a nitrogen-based flame retarder, an inorganic flame retarder, a silicon-based flame retarder, a metal salt based flame retarder and a fluorine-based flame retarder is contained as a flame retarder in said flame retardant resin composition or resin molded product along with said recovered disc.
17. The recycling method for a recovered disc according to claim 16 , wherein the flame retarder is a metal salt based flame retarder.
18. The recycling method for a recovered disc according to claim 16 , wherein the flame retarder is a sulfone series flame retarder.
19. The recycling method for a recovered disc according to claim 16 , wherein said recovered disc is a DVD disc.
20. The flame retardant resin composition according to claim 6 , wherein the flame retarder is a metal salt based flame retarder, wherein at least one of a halogen-based flame retarder, a phosphorus-based flame retarder, a nitrogen-based flame retarder, an inorganic flame retarder, a silicon-based flame retarder, a metal salt based flame retarder and a fluorine-based flame retarder is contained as a flame retarder along with said recovered disc.
21. The flame retardant resin composition according to claim 20 , wherein the flame retarder is a metal salt based flame retarder.
22. The flame retardant resin composition according to claim 20 , wherein the flame retarder is a sulfone series flame retarder.
23. The flame retardant resin composition according to claim 20 , wherein said recovered disc is a DVD disc.
24. The flame retardant resin molded product according to claim 11 , wherein the flame retarder is a metal salt based flame retarder, wherein at least one of a halogen-based flame retarder, a phosphorus-based flame retarder, a nitrogen-based flame retarder, an inorganic flame retarder, a silicon-based flame retarder, a metal salt based flame retarder and a fluorine-based flame retarder is contained as a flame retarder along with said recovered disc.
25. The flame retardant resin molded product according to claim 24 , wherein the flame retarder is a metal salt based flame retarder.
26. The flame retardant resin molded product according to claim 24 , wherein the flame retarder is a sulfone series flame retarder.
27. The flame retardant resin molded product according to claim 24 , wherein said recovered disc is a DVD disc.