Patents by Inventor Roman STEPANYAN
Roman STEPANYAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220251733Abstract: A process for production of a low-shrinkage aliphatic polyamide fibre, in which polyamide is extruded through a spinneret to form filaments, then cooled and combined to form at least one yarn. The at least one yarn is subjected to drawing between the spinneret and a pair of inlet rolls, then in a further multi-stage drawing step is subjected to 4-fold to 6-fold drawing by pairs of draw rolls. The pairs of draw rolls successively heat the yarn and at least the last pair of draw rolls has a temperature of 5° C. to 20° C. below the melting point of the yarn. The yarn is relaxed by from 6% to 10% in a subsequent at least three-stage relaxation zone and is kept in a temperature range of 5° C. to 15° C. below the melting point of the yarn, and is subsequently wound up on a reel device.Type: ApplicationFiled: April 28, 2022Publication date: August 11, 2022Applicant: TRUETZSCHLER GROUP SEInventors: Lassad NASRI, Roman STEPANYAN, Martinus Joseph Maria KEULERS
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SHOE COMPRISING A SOLE OF A THERMOPLASTIC MATERIAL AND A METHOD FOR USE IN MANUFACTURING SUCH A SHOE
Publication number: 20210330025Abstract: The present invention pertains to a new shoe comprising a sole of a thermoplastic material adhered to an upper shoe with a hot melt adhesive that is applied between the sole and the upper shoe, wherein the hot melt adhesive is fused with the thermoplastic material. Advantageously, the fusion is brought about by heating the hot melt adhesive to a temperature THM such that it softens, heating the second body such that the thermoplastic material that has a melting temperature TM obtains a temperature TSUB below TM while making sure that (THM+TSUB)/2 is equal to or higher than (TM?10° C.).Type: ApplicationFiled: September 3, 2019Publication date: October 28, 2021Inventors: Alwin PAPEGAAIJ, Roman STEPANYAN, Jan Hendrikus UDDING -
Patent number: 11111607Abstract: The present invention relates to a process for making high-strength polylactic acid elongated object comprising the steps of making a solution of polylactic acid in a solvent at a concentration of 5 to 50 mass %; spinning the solution through a spinplate comprising at least 1 spinhole to form a fluid elongated object; cooling the fluid elongated object with a cooling medium to form a solvent-containing gel elongated object; removing at least partly the solvent from the gel elongated object to form a solid elongated object; and drawing the elongated object while applying a draw ratio of at least 2, to form a high strength PLA elongated object, characterized in that the cooling medium has a temperature Tq of less than 0° C. The present invention also relates to gel-spun elongated objects comprising PLA with an IV in the range of 4-40 dl/g, and having a tenacity in N/tex such that Ten?0.146*IV, as well as gel-spun elongated object having a tenacity and a filament titer in tex (t) such that Ten?1.40*t ?0.3.Type: GrantFiled: July 21, 2017Date of Patent: September 7, 2021Assignee: DSM IP ASSETS B.V.Inventors: Harm Van Der Werff, Bengisu Corakci, Roman Stepanyan
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Publication number: 20200208302Abstract: An apparatus for production of a low-shrinkage aliphatic polyamide fibre, in which polyamide is extruded through a spinneret to form filaments, then cooled and combined to form at least one yarn. The at least one yarn is subjected to drawing between the spinneret and a pair of inlet rolls, then in a further multi-stage drawing step is subjected to 4-fold to 6-fold drawing by pairs of draw rolls. The pairs of draw rolls successively heat the yarn and at least the last pair of draw rolls has a temperature of 5° C. to 20° C. below the melting point of the yarn. The yarn is relaxed by from 6% to 10% in a subsequent at least three-stage relaxation zone and is kept in a temperature range of 5° C. to 15° C. below the melting point of the yarn, and is subsequently wound up on a reel device.Type: ApplicationFiled: March 9, 2020Publication date: July 2, 2020Applicants: TRUETZSCHLER GMBH & CO. KG, DSM IP ASSETS B.V.Inventors: Lassad NASRI, Roman STEPANYAN, Martinus Joseph Maria KEULERS
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Patent number: 10689778Abstract: A process and an apparatus for production of a low-shrinkage aliphatic polyamide fibre, in which polyamide is extruded through a spinneret to form filaments, then cooled and combined to form at least one yarn. The at least one yarn is subjected to drawing between the spinneret and a pair of inlet rolls, then in a further multi-stage drawing step is subjected to 4-fold to 6-fold drawing by pairs of draw rolls. The pairs of draw rolls successively heat the yarn and at least the last pair of draw rolls has a temperature of 5° C. to 20° C. below the melting point of the yarn. The yarn is relaxed by from 6% to 10% in a subsequent at least three-stage relaxation zone and is kept in a temperature range of 5° C. to 15° C. below the melting point of the yarn, and is subsequently wound up on a reel device. The invention further relates to a yarn composed of a low-shrinkage aliphatic polyamide fibre.Type: GrantFiled: December 5, 2015Date of Patent: June 23, 2020Assignees: TRUETZSCHLER GMBH & CO. KG, DSM IP ASSETS B.V.Inventors: Lassad Nasri, Roman Stepanyan, Martinus Joseph Maria Keulers
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Patent number: 10676844Abstract: The invention relates to a process for the preparation of a gel spun UHMWPE fiber comprising the steps of providing an ultra high molecular weight polyethylene composition having an intrinsic viscosity (IV) of at least 8 dl/g, a co-monomer content (CBR) of a least 0.05 SCB/1000TC, a mass averaged distribution of the co-monomer (CMAD) of at least 0.05, wherein the co-monomer has at least 4 carbon atoms, dissolving the composition in a solvent to form a polymer solution having a UHMWPE concentration of between 2 and 40 wt %, spinning the polymer solution through a multi orifice die plate to form a solution fibers, cooling the solution fiber to below 80° C. to form a gel fiber, drawing the fiber in at least one step to form a drawn fiber, removing at least a portion of the solvent before, during or after the drawing, wherein the ratio CMAD to CBR is greater than 1.0. The invention further relates to a gel-spun UHMWPE fiber obtainable by the process and products comprising said gel-spun UHMWPE fiber.Type: GrantFiled: December 12, 2016Date of Patent: June 9, 2020Assignee: DSM IP ASSETS B.V.Inventors: Tom Antonius Philomena Engels, Gert De Cremer, Romain Berthoud, Roman Stepanyan, Peter Roozemond, Filip Stefan Emiel Oosterlinck, John Richard Severn
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Publication number: 20190301057Abstract: Yarns are formed of a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, wherein copolyamide includes (a) at least 95 wt % by weight with respect to the total weight of copolyamide, monomeric units derived from hexamethylene diamine and adipic acid and (b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z. The summed amount of monomeric units derived from X, Y and Z is between 0.1 to 4.5 wt % by weight with respect to the total weight of the copolyamide. The yarns have a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04.Type: ApplicationFiled: June 19, 2019Publication date: October 3, 2019Inventors: Martinus Joseph Maria KEULERS, Roman STEPANYAN, Hao CHEN
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Publication number: 20190284726Abstract: The present invention relates to a process for making high-strength polylactic acid elongated object comprising the steps of making a solution of polylactic acid in a solvent at a concentration of 5 to 50 mass %; spinning the solution through a spinplate comprising at least 1 spinhole to form a fluid elongated object; cooling the fluid elongated object with a cooling medium to form a solvent-containing gel elongated object; removing at least partly the solvent from the gel elongated object to form a solid elongated object; and drawing the elongated object while applying a draw ratio of at least 2, to form a high strength PLA elongated object, characterized in that the cooling medium has a temperature Tq of less than 0° C. The present invention also relates to gel-spun elongated objects comprising PLA with an IV in the range of 4-40 dl/g, and having a tenacity in N/tex such that Ten?0.146*IV, as well as gel-spun elongated object having a tenacity and a filament titer in tex (t) such that Ten?1.40*t ?0.3.Type: ApplicationFiled: July 21, 2017Publication date: September 19, 2019Inventors: Harm VAN DER WERFF, Bengisu CORAKCI, Roman STEPANYAN
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Patent number: 10370780Abstract: The invention relates to a yarn comprising a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, which copolyamide comprises a) at least 95 wt % by weight with respect to the total weight of copolyamide, monomeric units derived from hexamethylene diamine and adipic acid and b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z, in which the summed amount of monomeric units derived from X,Y and Z is between 0.1 to 4.5 wt % by weight with respect to the total weight of the copolyamide and wherein the yarn has a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04. The invention also relates to a process for preparing the yarn.Type: GrantFiled: February 23, 2016Date of Patent: August 6, 2019Assignee: DSM IP ASSETS B.V.Inventors: Martinus Joseph Maria Keulers, Roman Stepanyan, Hao Chen
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Patent number: 10364330Abstract: Processes are disclosed for preparing biaxially oriented film by forming a polymer melt of a composition which includes at least 50 wt % with respect to the total amount of the composition of a copolyamide having at least 75 wt. % monomeric units derived from either (i) caprolactam or (ii) hexamethylene diamine and adipic acid, each of which further includes units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %, followed sequentially by casting and quenching a film of the polymer melt, MD-stretching of the film, TD-stretching the film, cooling the film after TD-stretching, and heat setting the biaxially oriented film. The resulting biaxially oriented film exhibits attributes suitable for use as food packaging.Type: GrantFiled: November 12, 2015Date of Patent: July 30, 2019Assignee: DSM IP ASSETS B.V.Inventors: Hao Chen, Alexander Antonius Marie Stroeks, Roman Stepanyan
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Publication number: 20190118455Abstract: The invention relates to a process for preparing a sequentially stretched biaxially oriented film, comprising the following steps: a) Melting a composition comprising at least 50 wt % with respect to the total amount of the composition of a copolyamide comprising: i. At least 75 wt % monomeric units derived from caprolactam, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; or ii. At least 75 wt % monomeric units derived from hexamethylene diamine and adipic acid, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.Type: ApplicationFiled: April 3, 2017Publication date: April 25, 2019Inventors: Roman STEPANYAN, Hao CHEN
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Publication number: 20180355515Abstract: The invention relates to a process for the preparation of a gel spun UHMWPE fiber comprising the steps of providing an ultra high molecular weight polyethylene composition having an intrinsic viscosity (IV) of at least 8 dl/g, a co-monomer content (CBR) of a least 0.05 SCB/1000TC, a mass averaged distribution of the co-monomer (CMAD) of at least 0.05, wherein the co-monomer has at least 4 carbon atoms, dissolving the composition in a solvent to form a polymer solution having a UHMWPE concentration of between 2 and 40 wt %, spinning the polymer solution through a multi orifice die plate to form a solution fibers, cooling the solution fiber to below 80° C. to form a gel fiber, drawing the fiber in at least one step to form a drawn fiber, removing at least a portion of the solvent before, during or after the drawing, wherein the ratio CMAD to CBR is greater than 1.0. The invention further relates to a gel-spun UHMWPE fiber obtainable by the process and products comprising said gel-spun UHMWPE fiber.Type: ApplicationFiled: December 12, 2016Publication date: December 13, 2018Inventors: Tom Antonius Philomena ENGELS, Gert DE CREMER, Romain BERTHOUD, Roman STEPANYAN, Peter ROOZEMOND, Filip Stefan Emiel OOSTERLINCK, John Richard SEVERN
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Publication number: 20180038019Abstract: The invention relates to a yarn comprising a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, which copolyamide comprises a) at least 95 wt % by weight with respect to the total weight of copolyamide, monomeric units derived from hexamethylene diamine and adipic acid and b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z, in which the summed amount of monomeric units derived from X, Y and Z is between 0.1 to 4.5 wt % by weight with respect to the total weight of the copolyamide and wherein the yarn has a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04. The invention also relates to a process for preparing the yarn.Type: ApplicationFiled: February 23, 2016Publication date: February 8, 2018Inventors: Martinus Joseph Maria KEULERS, Roman STEPANYAN, Hao CHEN
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Publication number: 20180030621Abstract: The invention relates to a Yarn comprising a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, which copolyamide comprises a) at least 95 wt % with respect to the total weight of copolyamide, monomeric units derived from epsilon-caprolactam and b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z, in which the summed amount of monomeric units derived from X,Y and Z is between 0.1 to 4.5 wt % with respect to the total weight of the copolyamide and wherein the yarn has a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04. The invention also relates to a process for preparing the yarn.Type: ApplicationFiled: February 23, 2016Publication date: February 1, 2018Inventors: Martinus Joseph Maria KEULERS, Roman STEPANYAN, Hao CHEN
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Publication number: 20170327653Abstract: The invention relates to a process for preparing a biaxially oriented film, comprising the following steps: a) Melting a composition comprising at least 50 wt % with respect to the total amount of the composition of a copolyamide comprising: i. At least 75 wt % monomeric units derived from caprolactam, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.2 to 25 wt %; or ii. At least 75 wt % monomeric units derived from hexamethylene diamine and adipic acid, and further monomeric units derived from diamines X and/or diacids Y and/or aminoacids Z in a summed amount of between 0.Type: ApplicationFiled: November 12, 2015Publication date: November 16, 2017Inventors: Hao CHEN, Alexander Antonius Marie STROEKS, Roman STEPANYAN
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Publication number: 20170327972Abstract: A process and an apparatus for production of a low-shrinkage aliphatic polyamide fibre, in which polyamide is extruded through a spinneret to form filaments, then cooled and combined to form at least one yarn. The at least one yarn is subjected to drawing between the spinneret and a pair of inlet rolls, then in a further multi-stage drawing step is subjected to 4-fold to 6-fold drawing by pairs of draw rolls. The pairs of draw rolls successively heat the yarn and at least the last pair of draw rolls has a temperature of 5° C. to 20° C. below the melting point of the yarn. The yarn is relaxed by from 6% to 10% in a subsequent at least three-stage relaxation zone and is kept in a temperature range of 5° C. to 15° C. below the melting point of the yarn, and is subsequently wound up on a reel device. The invention further relates to a yarn composed of a low-shrinkage aliphatic polyamide fibre.Type: ApplicationFiled: December 5, 2015Publication date: November 16, 2017Applicants: TRUETZSCHLER GMBH & CO. KG, DSM IP ASSETS B.V.Inventors: Lassad NASRI, Roman STEPANYAN, Martinus Joseph Maria KEULERS
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Publication number: 20160310910Abstract: The invention relates to a method for the manufacture of a layered membrane construction comprising a) providing a solution comprising a mixture of a polymer A and a polymer B in a weight ratio A/B between 50/50 and 95/05, polymer A having a melting temperature TmA and a polymer B having a melting temperature TmB wherein TmB is below TmA by at least 40° C.; b) applying the solution provided in step a) on a first carrier substrate to form a nanofiber layer on said substrate; c) consolidating the nanofiber layer formed on the substrate by thermal bonding at a temperature between TmB and TmA by means of a temperature and/or pressure cycle thus obtaining the membrane.Type: ApplicationFiled: December 11, 2014Publication date: October 27, 2016Inventors: Roman STEPANYAN, Marko DORSCHU, Petrus Johannes Lambertus BOONEN, Filip Stefan Emiel OOSTERLINCK