Patent number: US20230069369
Date of publication: 2023-03-02
Applicant(s): APANI SYSTEMS
Inventor(s): ROBINSON EMILY GRACE, LAND SCOT E
A textile recycling method receives textile-waste-to-be-recycled, sorts the waste to isolate cellulose-containing articles from non-cellulose-containing articles, and re-sizes at least some of the cellulose-containing articles to create feedstock. The feedstock is processed in a cellulose solvent reactor, which has at least one ionic liquid. The ionic liquid dissolves intermolecular cellulose bonds of the feedstock to create a spinning dope. Cellulose fibers dissolved in the cellulose-bearing spinning dope solution are extruded in a cellulose coagulation bath reservoir to reconstitute at least some of the cellulose fibers, and the reconstituted fibers are wet-spun to form a continuous cellulose thread that is commercially indistinguishable from virgin fiber thread. Synthetic fiber material is vacuum-extracted or mechanically extracted from the cellulose-bearing solution and recycled into a continuous synthetic thread. Original color of textile-waste-to-be-recycled can be retained or removed, and new color can be added.
A method of recycling textile waste cellulose
Patent number: EP4144785
Date of publication: 2023-03-03
Applicant(s): ASIA PACIFIC RESOURCES INT HOLDINGS, SETNA ROHAN P, ASIA PACIFIC RESOURCES INTERNATIONAL HOLDINGS
Inventor(s): GINTING EDUWARD, ANTES RUDINE, YING H'NG YIN, PANDITA SURYA DARMA
The present invention provides a method of recycling cellulose for use as a textile fibre feedstock, the method comprising: (i) providing a waste textile feedstock comprising greater than 50 wt% cellulose by weight of the waste textile feedstock; (ii) shredding the waste textile feedstock to provide a shredded waste textile feedstock comprising fibres which have a fibre length of less than 5 mm; (iii) mixing the shredded waste textile feedstock with an aqueous alkali solution having a pH of greater than 11 to produce a first mixture; (iv) filtering the first mixture to obtain an alkali treated shredded waste textile feedstock; (v) mixing the alkali treated shredded waste textile feedstock with an aqueous acid solution having a pH of less than 5 to produce a second mixture; and (vi) filtering the second mixture to obtain cellulose.
Recycled biodegradable plastic additive, biodegradable recycled fibers and method of making same
Patent number: US20230081428
Date of publication: 2023-03-16
Applicant(s): EVERYWHERE APPAREL
Inventor(s): CITRON MAXWELL, BENAVIDES NICHOLAS, CALLAN STEPHEN J
The invention comprises a composition. The composition comprises a biodegradable polymer and a biodegradation catalyst comprising: (a) an inorganic compound selected from calcium phosphate, hydroxyapatite, calcium chloride, calcium sulfate, calcium citrate, calcium lactate, magnesium carbonate, magnesium hydroxide, magnesium oxide, magnesium lactate, magnesium sulfate, magnesium calcium carbonate, magnesium citrate or combinations or mixtures thereof; or (b) an organic component selected from bone meal, collagen, milk powder, egg shell reacted with phosphoric acid, egg shell reacted with phosphoric acid, keratin or combinations or mixtures thereof; or (c) combinations or mixtures of (a) and (b). The composition can also optionally include thermoplastic or recycled thermoplastic carrier polymers. Methods of making masterbatch pellets, fibers, yarns and textiles are also disclosed.
System and method of processing recycled textile material
Patent number: EP4112808
Date of publication: 2023-01-04
Applicant(s): VALMET TECHNOLOGIES
Inventor(s) : AHO TUOMO, HUHTANEN JUHA-PEKKA, POUSI JUHA
The invention relates to a system of processing recycled textile material comprising synthetic fibers and non-synthetic fibers, which system (10) comprises feeding means (11) and a dispersing section (12). The dispersing section (12) is configured to perform a dispersing stage to tear pieces of recycled textile into fibers and/or fiber flocks in high consistency of 15-90%, more advantageously 20-60%, most advantageously 25-45% and the dispersing section (12) comprises at least one dispergator (121) or at least one HC-refiner with fillings formed of bars with bar width of 1,5 mm - 20 mm and grooves with groove depth of 1 mm - 50 mm and groove width of 1 mm - 20 mm. The invention also relates to a method of processing recycled textile fibers, in which method recycled textile material comprising synthetic fibers and non-synthetic fibers, in particular cotton fibers, is processed, which method is performed in a system (10) comprising feeding means (11) and a dispersing section (12), which method comprises a feeding stage, in which pieces of the recycled textile material is fed and/or shredded by the feeding means (11), and a dispersing stage, in which the pieces of the recycled material are torn to fibers and/or fiber flocks of the recycled textile material in the dispersing section (12). The dispersing stage to tear pieces of recycled textile into fibers and/or fiber flocks is performed in high consistency of 15-90%, more advantageously 20-60%, most advantageously 25-45% by at least one dispergator (121) or at least one HC-refiner with fillings formed of bars with bar width of 1,5 mm - 20 mm and grooves with groove depth of 1 mm - 50 mm and groove width of 1 mm - 20 mm.
A process for manufacturing waste textile fiber reinforced polymer composites and composites produced therewith
Patent number: WO2023/285891
Date of publication: 2023-01-19
Applicant(s): WIJESINGHE AROSH SANDEEPA
Inventor(s): WIJESINGHE AROSH SANDEEPA
The invention discloses herein is a process for manufacturing waste textile fiber reinforced polymer composites, using spandex or polyspandex fabric waste blending with crushed and/or recycled and/or virgin polypropylene or high impact polystyrene. The fabric waste is crushed in to particles of size 100µm - 700µm and cleaned and blended with crushed and/or recycled and/or virgin polypropylene or high impact polystyrene and also with adhesive modifiers and/or plasticizers in accordance with predetermined ratios depending on the final product requirement. The mixture is pre-heated up to a temperature of 70°C - 90°C to take off the moisture therein and then subject to extrusion via a twin-screw extruder while controlling the barrel temperature between 160°C-220°C and the nozzle temperature increased to 2% to 10% of the moulding machine to achieve waste textile fiber reinforced polymer composite pallets.
Method for recycling polyester fabrics with use of ionic liquid catalyst
Patent number: US20230062055
Date of publication: 2022-12-11
Applicant(s): NANYA PLASTICS
Inventor(s): LIAO TE-CHAO, CHUANG JUNG-JEN, CHENG WEI-SHENG, HUANG ZHANG-JIAN, TSENG YU-TI
A method for recycling polyester fabrics with use of an ionic liquid catalyst is provided, which includes: providing a recycled polyester fabric; and using a chemical de-polymerization liquid to chemically de-polymerize the recycled polyester fabric and form a de-polymerization product that includes bis-2-hydroxylethyl terephthalate (BHET). The chemical de-polymerization liquid is used to chemically de-polymerize the recycled polyester fabric in an environment where a de-polymerization catalyst exists, and the de-polymerization catalyst is the ionic liquid catalyst in a solid state.
Process for obtaining an article formed from a thermoplastic matrix and a textile filler
Patent number: FR3124970
Date of publication: 2023-01-13
Inventor(s): VENTENAT VINCENT
A process for obtaining an article formed from a thermoplastic matrix, said process providing for formulating inlets comprising at least one source of thermoplastic material and at least one source of filler; mixing and grinding said intakes; thermo-compressing said ground material to obtain the article, the feedstock source comprising articles to be recycled comprising at least one textile material (WO2023/001602).
Meltblown non-woven fabric, multi-layered spunbonded non-woven fabric comprising same, and method for manufacturing same
Patent number: WO2022/265221
Date of publication: 2022-12-21
Applicant(s): TORAY ADVANCED MATERIALS KOREA
Inventor(s): LIM, SUNG-SOO, MIN, KYUNGWON
The present invention relates to meltblown non-woven fabric, multi-layered spunbonded non-woven fabric comprising same, and a method for manufacturing same, and to: meltblown non-woven fabric which uses recycled polyester flakes, thus being environmentally friendly, and is a material used in a sound absorbing material for automobiles due to the excellent rigidity, sound absorption capability and compressive modulus thereof, and thus can be used in automobile interior materials that require rigidity, sound absorption capability, and compressive modulus, such as wheel guards and trunk trims of automobiles; multi-layered spunbonded non-woven fabric comprising same; and a method for manufacturing same.