公开(公告)号：US10676844B2

公开(公告)日：2020-06-09

申请号：US15781789

申请日：2016-12-12

Applicant: DSM IP Assets B.V.

Inventor： Tom Antonius Philomena Engels ,  Gert De Cremer ,  Romain Berthoud ,  Roman Stepanyan ,  Peter Roozemond ,  Filip Stefan Emiel Oosterlinck ,  John Richard Severn

IPC: D01F6/30 ,  D01D5/06 ,  D01F6/46 ,  C08F110/02 ,  D01F6/04 ,  C08F10/02

Abstract: 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.

公开(公告)号：US10370780B2

公开(公告)日：2019-08-06

申请号：US15551633

申请日：2016-02-23

Applicant: DSM IP ASSETS B.V.

Inventor： Martinus Joseph Maria Keulers ,  Roman Stepanyan ,  Hao Chen

IPC: D02G3/04 ,  D01D5/16 ,  D01F6/80 ,  D02G3/44

Abstract: 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.

公开(公告)号：US11111607B2

公开(公告)日：2021-09-07

申请号：US16318778

申请日：2017-07-21

Applicant: DSM IP Assets B.V.

Inventor： Harm Van Der Werff ,  Bengisu Corakci ,  Roman Stepanyan

IPC: D01F6/92 ,  D01F6/62 ,  D01D5/06 ,  D01D5/12 ,  C08L67/04 ,  C08G63/08

Abstract: 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. The invention also relates to articles containing said gel-spun elongated objects.

公开(公告)号：US10689778B2

公开(公告)日：2020-06-23

申请号：US15537866

申请日：2015-12-05

Applicant: TRUETZSCHLER GMBH & CO. KG ,  DSM IP ASSETS B.V.

Inventor： Lassad Nasri ,  Roman Stepanyan ,  Martinus Joseph Maria Keulers

IPC: D01D5/16 ,  C08G69/46 ,  D01D4/02 ,  D01F6/60 ,  D02G3/02 ,  D02G3/44 ,  D02J1/22

Abstract: 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.