Dsm IP Assets B.v.

Truetzschler Gmbh & Co. Kg

Roman Stepanyan

Hao Chen

Martinus Joseph Maria Keulers

Harm Van Der Werff

Alexander Antonius Marie Stroeks

Romain Berthoud

John Richard Severn

Lassad Nasri

Tom Antonius Philomena Engels

Peter Roozemond

Bengisu Corakci

Filip Stefan Emiel Oosterlinck

Gert De Cremer

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 Tof less than 0&#xb0; 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&#x2265;0.146*IV, as well as gel-spun elongated object having a tenacity and a filament titer in tex (t) such that Ten&#x2265;1.40*t. The invention also relates to articles containing said gel-spun elongated objects.

Process for making high-strength polylactic acid filament

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&#xb0; C. to 20&#xb0; 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&#xb0; C. to 15&#xb0; 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.

Process and apparatus for the production of a low-shrinkage aliphatic polyamide yarn, and low-shrinkage yarn

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&#xb0; 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.

Low creep fiber

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.

High strength polyamide yarn

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.

Process to prepare biaxially oriented film

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Echt, Netherlands

Roman Stepanyan