Process for degrading plastic products
AssigneeCarbios
InventorMadiha Aloui Dalibey
Life of this patent
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Abstract
The present invention relates to a process for degrading a plastic product comprising at least one polymer, the process comprising submitting the plastic product to a spinning step to obtain fibers of said plastic product; and depolymerizing at least one polymer of said fibers.
Claims17
A process for degrading a plastic product comprising at least one thermoplastic polymer, the process comprising:
- a) submitting the plastic product to a spinning step to obtain fibers of said plastic product, wherein the spinning step comprises a melt-spinning step implemented with a plastic product in a partially or totally molten state, wherein the melt plastic product is extruded through spinnerets for non-woven products into fibers and wherein the fibers obtained exhibit a porosity rate above 30%;
- and
- b) depolymerizing at least one thermoplastic polymer of said fibers by contacting said fibers with a biological depolymerizing agent.
A process for degrading a plastic product comprising at least PET comprising the steps of:
- a) submitting said plastic product to melt-spinning at a temperature above 170° C., said melt-spinning being implemented with a plastic product in a partially or totally molten state, wherein the melt plastic product is extruded through spinnerets for non-woven products and wherein fibers obtained from said melt-spinning exhibit a porosity rate above 30%, and cooling the resulting fibers at a temperature below 100° C.;
- b) depolymerizing PET in said fibers by contacting said fibers with a biological depolymerizing agent;
- and optionally
- c) recovering and optionally purifying oligomers and/or monomers resulting from depolymerization of said PET.
A method of producing monomers and/or oligomers and/or degradation products from a plastic product comprising at least one thermoplastic polymer, comprising submitting successively the plastic product to a spinning step comprising a melt-spinning step implemented with the plastic product in a partially or totally molten state, wherein the melt plastic product is extruded through spinnerets for non-woven products and wherein extruded fibers obtained in said melt-spinning step exhibit a porosity rate above 30%, and to a depolymerizing step comprising exposing the plastic product to a depolymerase.
A process for degrading a spun plastic product comprising at least one polymer, said process comprising a melt-spinning step implemented with a plastic product in a partially or totally molten state and extruding a melt plastic product through spinnerets for non-woven products and wherein extruded fibers obtained in said melt-spinning step exhibit a porosity rate above 30% and contacting the extruded fibers with a biological depolymerizing agent able to degrade at least one polymer of said plastic product, and wherein said spun plastic product is obtained from rigid or flexible plastic wastes and/or from crystalline plastic fibers.
A process for recycling a plastic product selected from rigid or flexible plastic wastes and/or from crystalline plastic fibers and comprising at least one target polymer, said process comprising comprising a melt-spinning step implemented with said plastic product in a partially or totally molten state and extruding a melt plastic product through spinnerets for non-woven products and wherein extruded fibers obtained in said melt-spinning step exhibit a porosity rate above 30% and contacting the extruded fibers with a biological depolymerizing agent, and wherein said at least one target polymer has been optionally amorphized.
Dependencies are inferred from the claim text.