CN104955992A - Method of manufacturing a drawn multifilament yarn - Google Patents
Method of manufacturing a drawn multifilament yarn Download PDFInfo
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- CN104955992A CN104955992A CN201480005797.2A CN201480005797A CN104955992A CN 104955992 A CN104955992 A CN 104955992A CN 201480005797 A CN201480005797 A CN 201480005797A CN 104955992 A CN104955992 A CN 104955992A
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- Prior art keywords
- multifilament yarn
- torsion
- yarn
- spin solvent
- stretching
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
- D10B2321/0211—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene high-strength or high-molecular-weight polyethylene, e.g. ultra-high molecular weight polyethylene [UHMWPE]
Abstract
The invention relates to a method of manufacturing a polyolefin multifilament yarn comprising twisting a partially drawn multifilament yarn and post-twist-drawing the twisted partially drawn multifilament yarn.
Description
Technical field
The present invention relates to the method manufacturing multifilament yarn (such as high-performance polyethylene (HPPE) multifilament yarn).More specifically, the present invention relates to the method for manufacture and/or clean multifilament yarn, wherein without the need for machine spinning oil (finish).
background of invention
Usually via manufacturing multifibres polyethylene yarn as follows: by having the spinning head spin fluid of a large amount of spinneret orifice (spinhole), such as molten polyethylene or the polyethylene solution in spin solvent (sometimes also referred to as gel), to form silk.Then, cooling also drawn yarn.If use spin solvent, then by such as evaporating or extracting this solvent of removing at least some.The example of manufacture method is melt spinning method (as disclosed in such as EP1445356), solid state process (as disclosed in such as EP1627719) or gel spinning (as disclosed in such as WO 2005/066401).General description also appears at " Advanced Fibre Spinning Technology ", and T.Nakajima compiles, Woodhead Publ.Ltd (1994), in ISBN 185,573 182 7, is all incorporated to by reference herein.
Problem when manufacturing polyethylene multifilament yarn is: polyethylene is electrical insulators, therefore tends to accumulate static charge during manufacture; And due to multifilament yarn each monofilament similarly charged (positive electricity or negative electricity), so each monofilament is by Coulomb repulsion each other.This represents: multifilament yarn will tend to unclamp and non-formation entity.In addition, when fracture of wire, silk end by far away as far as possible for the main body tending to move to distance multifilament yarn, thus forms the quality reducing manufactured multifilament yarn by fine hair; Or even there is the silk (end) unclamped to be stumbled in the risk in manufacturing equipment, and therefore even need to stop producing to discharge fracture of wire.
Traditionally, this by adding organic spinning oil and being solved during drawing process in multifilament yarn.But organic spinning oil is surface-activity product, due to environment reason, it should be avoided.
Proposed a kind of approach reducing the impact of spinning oil in WO2004/053212, wherein suggestion uses volatility spinning oil.
goal of the invention
The object of this invention is to provide the method for the manufacture multifilament yarn through improving.
Another object of the present invention be to provide through improve multifilament yarn or yarn configuration.
disclosure of the invention
Improvement can be such as: one or more ambient influnences reduce, better logistics, the process of minimizing or provided by the present invention other as mentioned below improve.
In a first aspect of the present invention, realize target of the present invention by the method manufacturing multifilament yarn, said method comprising the steps of: provide part stretching multifilament yarn, this part stretching multifilament yarn comprises partially drawn yarn; Being reversed by described part stretching multifilament yarn to the part stretching twist is that 4-600 turn/rice is to form the part stretching multifilament yarn through reversing; With with at least 1.1 draw ratio DR
ptreverse the part stretching multifilament yarn of after-drawing through reversing.
Such as disclosed in WO2005/066401, when the spinneret orifice of multifibres spinning head have shape be suitable for providing part to stretch or the shrinking zone of the silk of adjustment in spinneret orifice, spinning process directly can provide part stretching multifilament yarn.Part stretching multifilament yarn can also be the result stretched in the air gap after spinneret orifice.Preferably, after such as, cooling in hardening bath after spinning, part stretching multifilament yarn is solids stages yarn.If fruit part stretching multifilament yarn is gel spinning multifilament yarn, then preferably, before reverse part stretching multifilament yarn, remove solvent at least partially (with spinning duration by compared with the solvent of spinning head).
Stretching multifilament yarn occurs in multiple steps.Stretching multifilament yarn in reverse part can online with stretching step (inline) carry out, or is not connected with stretching step and off line (offline) is carried out." online " represents in this article: part drawing directly runs/is traveling between the station that the station (station) of carrying out reverse part stretching multifilament yarn and multifilament yarn be stretched." off line " ordinary representation: between winding steps occurs in and stretches and reverse.
brief Description Of Drawings
More fully the present invention is described below with reference to illustrative embodiments and accompanying drawing, wherein
Fig. 1 shows the schematic flow diagram according to multiple method of the present invention, and
Fig. 2 shows the schematic flow diagram manufactured according to the method for HPPE multifilament yarn of the present invention.
All figure have only been shown as the explanation step wanted required for the present invention, and other parts are omitted or only mention.
detailed Description Of The Invention
Can carry out the stretching of multifilament yarn in one or more following variants (see Fig. 1): online stretching before a) reversing, off line reverses after-drawing subsequently; B) all online stretching before and after reverse part stretching multifilament yarn; C) before reversing, off line stretches, and online stretching after reversing; D) all off line stretches before reversing and after reversing, thus the torsion of part drawing occur in reverse before and the stretching of part stretching multifilament yarn after reversing be separated in the step of (in the time and/or spatially).
Preferably, online carry out reverse part stretching multifilament yarn and reverse after-drawing.More than one torsion after-drawing step can be comprised according to method of the present invention.If carry out more than one torsion after-drawing step in the method according to the invention, then preferably, reverse part stretching multifilament yarn and at least one reverse that after-drawing step is online carries out; More preferably, reverse part stretching multifilament yarn and all torsion after-drawing steps are online carries out.More than one its twisting step can be comprised according to method of the present invention.If carry out more than one its twisting step in the method according to the invention, then preferably, at least one its twisting step carries out with torsion after-drawing step is online.
Stretching multifilament yarn in reverse part can carry out or can be combined into one-block apparatus with one or more in stretching furnace, hardening bath, up-coiler, unwinder, spinning plate on special (stand alone type) equipment.In one embodiment, by such as US 6,155, the online twist system described in 037 carries out reverse part drawing.US 6,155, the online twist system described in 037 is hereinafter referred to as Uster twist system.The end keeping off (having access to) yarn because this kind equipment allows to introduce sth. made by twisting (twist) in part stretching multifilament yarn, therefore this kind equipment is particularly useful for the existing equipment of repacking, such as existing stretching furnace or existing up-coiler or unwinder.Therefore, one aspect of the present invention relates to the combination of Uster twist system and stretching furnace, Uster twist system and the combination of up-coiler or the combination of Uster twist system and unwinder.
In particularly preferred embodiments, by carrying out reverse part drawing as follows: first reel without the part stretching multifilament yarn reversed, torsion barrel subrack system is adopted to make the part stretching multifilament yarn unwinding without reversing carry out reverse part stretching multifilament yarn subsequently.Preferably, arrange torsion barrel subrack system to carry out unwinding and torsion with torsion after-drawing technique is online, wherein adjust the withdrawal speed of torsion barrel subrack system and rotary speed to adapt to online torsion after-drawing technique.
Also following steps can be comprised: after reverse part stretching multifilament yarn and after twisting before stretched portion drawing, tension multifilament yarn in stretch-draw station (tensioning station) according to method of the present invention.This allows the tension force in retaining part stretching multifilament yarn relatively low during reversing, and the tension force during stretching can keep enough high to guarantee required stretching.The example at suitable stretch-draw station comprises some roller bearings, brakes and friction system.
For all aspects of the present invention, under the stretching of multifilament yarn usually occurs in the temperature of raising.Preferably, at the temperature that at least one stretching step occurs in higher than 100 DEG C; Preferably, at the temperature that at least one stretching step occurs in higher than 120 DEG C.Preferably, at the temperature that at least one stretching step occurs in lower than multifilament yarn fusing point.More preferably, at the temperature that all stretching step after spinning occur in lower than multifilament yarn fusing point.Also more preferably, at the temperature that all stretching step after spinning occur in than low at least 5 DEG C of multifilament yarn fusing point, and more preferably at the temperature than low at least 10 DEG C of multifilament yarn fusing point.Especially, preferably, reversing after-drawing occurs in the scope between multifilament yarn fusing point and lower than multifilament yarn fusing point 30 DEG C; More preferably, under torsion after-drawing occurs in the temperature of lower than multifilament yarn fusing point at least 5 DEG C (such as, low than multifilament yarn fusing point at least 10 DEG C).For gel spinning UHMWPE multifilament yarn, preferably, at the temperature that (particularly reversing after-drawing) occur in lower than 138 DEG C of stretching, at the temperature that is preferably lower than 135 DEG C, more preferably lower than at the temperature of 132 DEG C.For gel spinning UHMWPE multifilament yarn, preferably, at the temperature that (particularly reversing after-drawing) occur in higher than 100 DEG C of stretching, preferably higher than at the temperature of 110 DEG C, more preferably higher than at the temperature of 120 DEG C, more preferably higher than at the temperature of 130 DEG C.
In linguistic context of the present invention, " monofilament " is understood to the slender bodies representing indefinite length, and its length dimension is far longer than its sectional dimension (such as width, thickness or radius), and can have rule or irregular cross section.Monofilament can have continuous print length (being called as silk in the art) or discontinuous length (being called as staple fibre in the art).Multifilament yarn according to the present invention is the slender bodies comprising multifilament.
" gel spinning multifilament yarn " is interpreted as in this article: by making to comprise solution (sometimes also referred to as the gel) spinning of polymer and the solvent for this polymer and the multifilament yarn manufactured.By carrying out the spinning of solution as follows: in an extruder the suspended matter of polymer and solvent is transformed into solution and extrudes described solution by the spinning head comprising more than one spinneret orifice.Particularly preferably be gel spinning Polyolefin multifilament yarns, it is by comprising polyolefin and forming for the solution-polymerized SBR of polyolefinic solvent, described solvent can be removed from multifilament yarn by evaporation after spun yarn, such as cycloalkane, such as decahydronaphthalenes, tetrahydronaphthalene or hexahydrotoluene.
Preferably, be high-performance gel spinning multifilament yarn according to the gel spinning multifilament yarn that the present invention obtains, its toughness is at least 1.5N/tex, preferably at least 2.0N/tex, more preferably at least 2.5N/tex or even at least 3.0N/tex.The toughness of multifilament yarn does not have the upper limit, but can manufacture the gel spinning multifilament yarn that toughness is generally about 5-6N/tex at the most.Usually, this kind of high-performance gel spinning multifilament yarn also has such as the high stretch modulus (being also referred to as Young's modulus) of at least 50N/tex, preferably at least 75N/tex, more preferably 100N/tex, most preferably at least 125N/tex.Stretch modulus does not have the upper limit, but the toughness of gel spinning multifilament yarn is generally about 180N/tex at the most.
As based on ASTM D2256-97, measured TENSILE STRENGTH (also referred to as intensity) toughness and the modulus of multifilament yarn by known method.
The fiber number of multifilament yarn obtained according to the present invention is preferably at least 2dtex, preferably at least 7dtex, more preferably at least 8dtex.Due to actual cause, the fiber number of multifilament yarn of the present invention is several thousand dtex, preferably 2500dtex, more preferably 500dtex at the most at the most at the most.Preferably, the fiber number of every rhizoid of the multifilament yarn of multi-filament is comprised within the scope of 0.2-5dtex, preferably within the scope of 0.5-2dtex.Comprise the fiber number of every rhizoid of the part stretching multifilament yarn of multi-filament preferably within the scope of 0.5-25dtex.
Multifilament yarn is preferably selected from the group be made up of polyolefin (such as, polyethylene and polypropylene), polyester (such as, PET, vectran and PLA), polyamide (such as, nylon and aramid fiber); More preferably, multifilament yarn is polyolefin.Preferably, polyolefin is polypropylene or polyethylene, more preferably ultra-high molecular weight polyethylene (UHMWPE) used according to the present invention.
" HPPE multifilament yarn " is interpreted as high-performance polyethylene in this article, the yarn comprising stretching polyethylene of its to be Young's modulus be at least 30GPa.A particularly preferred class HPPE is gel-spun UHMwPE (UHMWPE), and the intrinsic viscosity (IV) of the UHMWPE wherein measured based on the solution of UHMWPE in decahydronaphthalenes at 135 DEG C is at least 5dl/g, preferably at least 10dl/g, more preferably at least 15dl/g, most preferably at least 21dl/g.Preferably, IV is 40dl/g, more preferably 30dl/g, even more preferably 25dl/g at the most at the most at the most.The Young's modulus of gel spinning UHMWPE is generally at least 50GPa.Preferably, the toughness of HPPE multifilament yarn is at least 1GPa.Preferably, HPPE multifilament yarn comprises the UHMWPE silk of at least 90 weight-%; Most preferably, HPPE multifilament yarn is made up of UHMWPE silk.
" yarn configuration " represents in this article: such as by braiding, weaving, knitting, reverse, the set of at least two multifilament yarns that heat treatment (comprise partial melting, air be wound around and gummed) is connected.
" torsion after-drawing " represents in this article: reversing yarn with at least 4 turns/meters
afterwardsoptionally described yarn is transformed into yarn configuration
before, with the technique of the factor drawing of at least 1.1.Should observe: drawing structure (such as, the cord construction stretched as described in EP 0 398 434) be the technique fundamentally different from reversing after-drawing, because the fundamentally different effect that rearranged by the silk of the described structure of creep (creep) of drawing constitution realization, and the coherence (coherence) between the silk not improving single yarn between each monofilament in a multifilament yarn with yarn configuration.In addition, except more relevant tow, before stretching (post-twist-drawing), stretching multifilament yarn in reverse part is provided in better heat distribution and stress distribution in multifilament yarn during also demonstrating stretching after twisting after twisting,, this allows stretching more homogeneous in silk level again.More homogeneous stretching causes the machinability of the multifilament yarn obtained to improve and the productive rate of manufacture method improves, and causes wire broken rate to reduce because more homogeneous stretching demonstrates.Compared with constructing with drawing, reverse after-drawing and also cause fiber number to reduce more.
In one preferred embodiment, reversing part stretching multifilament yarn to the part stretching twist is that 10-500 turns/rice; More preferably, reversing part drawing to the part stretching twist is that 12-200 turns/rice.The best part stretching twist depend on multifilament yarn fiber number, reverse after-drawing ratio, expectation multifilament yarn the twist and optional stretch after twisting after be applied to the twist of multifilament yarn.
Another preferred embodiment in, with the DR of at least 1.5
pt, more preferably at least 2 DR
pt, most preferably at least 3 DR
ptreverse the part stretching multifilament yarn of after-drawing through reversing.Reverse after-drawing and compare DR
ptthe upper limit depend on reverse part drawing before draw ratio before the condition (such as, the type of polymer) of yarn and reverse part drawing and reverse the temperature of after-drawing.Usually, reverse after-drawing ratio and be less than 1000; Preferably, DR
ptfor at the most 100; More preferably, DR
ptbe less than 50; More preferably, DR
ptfor at the most 25; More preferably, DR
ptfor at the most 10 or be less than 10.
After the part stretching twist is reverse part stretching multifilament yarn, described part stretching multifilament yarn is instant/revolution/rice of directly having.In a preferred embodiment of the present invention, part stretching multifilament yarn is reversed to following level, wherein the part stretching twist and the draw ratio DR reversing after-drawing
ptbetween business (factor) 2-250 turn/rice between; Preferably, partly stretch the twist/DR
pt2-120 turn/rice between; More preferably, partly stretch the twist/DR
pt2-20 turn/rice between, such as 5-20 turns/rice.In one embodiment, the twist of part stretching multifilament yarn is enough high, to such an extent as to after reversing after-drawing, does not need to reverse multifilament yarn further.
Part stretching multifilament yarn can be yarn of the same race or xenogenesis yarn." yarn of the same race " represents: multifilament yarn is made up of the silk with same composition." xenogenesis yarn " represents: at least one silk in multifilament yarn has and other the different composition in multifilament yarn.In one embodiment, at least one silk in part stretching multifilament yarn is selected from the group be made up of (coloured or colourless) Polyester Filament, HD polyethylene filament, UHMWPE silk, polyacrylic fibres.Preferably, part stretching multifilament yarn comprises the UHMWPE silk of at least 75 number %; More preferably, part stretching multifilament yarn comprises the UHMWPE silk of at least 90 number %.Most preferably, the silk of part stretching multifilament yarn is made up of UHMWPE silk, because this provides the most by force and the most uniform performance for multifilament yarn.
Another aspect of the present invention relates to the method removing spin solvent from gel spinning multifibres polyethylene yarn.Described method comprises the steps: that providing package contains the multifilament yarn of polyolefin filaments and spin solvent, and reversing described yarn to the twist is that 10-600 turns/rice, and from multifilament yarn, removes spin solvent at least partially after torsion yarn.The multifilament yarn provided in a first step can be the gel spinning multifilament yarn not stretching, partly stretch or stretch after twisting, but preferably, multifilament yarn is partly stretched or stretches after twisting.Preferably by evaporation or extraction removing spin solvent.When spin solvent is cycloalkane (such as decahydronaphthalenes, tetrahydronaphthalene and/or hexahydrotoluene), evaporate especially applicable.When spin solvent comprises alkane, extract especially applicable.Reverse multifilament yarn at least partially before solvent and allow to carry out towards the transformation of yarn configuration when not adding spinning oil in multifilament yarn when removing from multifilament yarn.In other words, this aspect of the present invention allows from multifilament yarn, remove spin solvent in more eco-friendly mode and do not jeopardize the operability of yarn, because do not need spinning oil or need small amount spinning oil.In this embodiment of the present invention, it is also preferred for reversing after-drawing multifilament yarn, but this is also nonessential.After the preferred twist and optional torsion, the twist corresponds to herein about the twist described by other side of the present invention.
In an embodiment of the invention, before reverse part stretching multifilament yarn, the content of spin solvent of multifilament yarn is very low.In this embodiment, preferably, based on the weight of polyethylene and spin solvent, during reversing, the spin solvent of multifilament yarn is 10ppm-1000ppm.Preferably, during reversing, the spin solvent of part stretching multifilament yarn is 20ppm-500ppm.
In another embodiment of the invention, based on the weight of polyethylene and spin solvent, during torsion multifilament yarn, the content of spin solvent of multifilament yarn is at least 0.1 weight-%; Preferably, the content of spin solvent of multifilament yarn is at least 0.5 weight-%; More preferably, the content of spin solvent of multifilament yarn is at least 2 weight-%; More preferably, the content of spin solvent of multifilament yarn is at least 5 weight-%, such as at least 10 weight-%.Usually, during torsion multifilament yarn, the content of spin solvent of multifilament yarn is lower than 90 weight-%.
Content before the amount reversing the solvent removed after multifilament yarn depends on torsion to a great extent.In addition, the solvent of the multifilament yarn through reversing after-drawing is lower, then, before remove desolventizing from yarn, reverse the impact of coherence larger.In one embodiment, after torsion multifilament yarn, the spin solvent existed during the torsion of removing at least 10 weight-%; Preferably, after torsion multifilament yarn, the spin solvent existed during the torsion of removing at least 90 weight-%.Most preferably, after torsion multifilament yarn, the spin solvent existed during the torsion of removing at least 99 weight-%.Should observe: if adopt more its twisting step, then the solvent during reversing is the solvent during the first its twisting step.The mark of the solvent removed from multifilament yarn after torsion depends on the amount reversing front existence to a certain extent.Preferably, the solvent of removing 100%, but can stay in multifilament yarn due to trace solvent, so in one embodiment, the solvent of removing 99.999% at most.Preferably, collected by any means known and re-use the spin solvent removed.
In clean method according to this aspect of the invention, highly preferably, described method also comprises torsion after-drawing step.Especially, find: with the draw ratio DR of at least 1.1
ptreverse after-drawing multifilament yarn and be of value to formation HPPE multifilament yarn.More preferably, the draw ratio reversing after-drawing is at least 1.5; Even more preferably, DR
ptfor at least 2; Most preferably, DR
ptfor at least 3.Reverse after-drawing and compare DR
ptthe upper limit depend on reverse part drawing before draw ratio before the condition (such as, the type of polymer) of yarn and reverse part drawing and reverse the temperature of after-drawing.Usually, reverse after-drawing and compare DR
ptbe less than 1000; Preferably, DR
ptfor at the most 100; More preferably, DR
ptbe less than 50; More preferably, DR
ptfor at the most 25; More preferably, DR
ptfor at the most 10 or be less than 10.
Because due to the electrostatic charge effect of electric isolution polymer, manufacturing gel spinning multifibres HPPE needs to add spinning oil traditionally during removing spin solvent, otherwise silk will repel mutually.Unfortunately, spinning oil is surfactant, and from environmental perspective, it is not the additive expected; Especially for medical applications, spinning oil should be avoided.Therefore, one aspect of the present invention relates to manufacture gel spinning HPPE multifilament yarn and does not add the method for spinning oil.Flow chart in Fig. 2 indicates the method.Described method comprises the steps: the solution of UHMWPE in spin solvent (based on the UHMWPE in solution and spin solvent) providing (2) 3-25 weight-%.Can such as pass through to provide solution as follows: the suspended matter changing UHMWPE and spin solvent in an extruder, by having spinning head spinning (4) solution of at least 2 spinneret orifices, solution quenching (6) in hardening bath, and stretch (7) are to form the solid-state multifilament yarn comprising part stretching UHMWPE silk.Then, by part stretching multifilament yarn reverse (12) to the twist be 2-600 turn/rice with formed through reverse part stretching multifilament yarn, and with at least 1.1 draw ratio DR
ptreversing the part stretching multifilament yarn of after-drawing (13) through reversing to form HPPE multifilament yarn, wherein carrying out when not adding spinning oil in multifilament yarn reversing, removing spin solvent and reverse after-drawing.Spin solvent is at least partially removed by evaporating or extracting during the method.Reverse part stretching multifilament yarn can with reverse before online, the off line of the stretching carried out or online to combine with off line carry out.Stretching multifilament yarn in reverse part can carry out with online, the off line of torsion after-drawing or online to combine with off line.Find, very advantageously: the stretching before reversing is carried out with torsion off line and carried out reversing, because this allows good traceability and compact process equipment with at least part of torsion after-drawing is online.
Method according to the present invention is particularly useful for the polyethylene yarn prepared and be ready to use in medical applications, medical maintenance product, implant and medicine equipment, because described method allows to prepare polyethylene yarn when not using spinning oil (particularly organic spinning oil), wherein organic spinning oil is in health or normally less desirable with Body contact.The example of medical applications is medical assembly, such as blood vessel prosthesis, joint converters, orthopaedic implant and spinal implant (such as meniscal implant, surgical sutures), mesh (such as hernia net), fabric, the textiles of weaving or nonwoven, sheet material, band, web, ribbon, artificial joint, cable (such as, wound fixing cable, breastbone close cable, preventative or prosthese cable, long bone fracture fixing cable, short bone fracture fixation cable), tubular products (such as, ligament substitute), endless loop (endless loop) product, bag-shaped product, spherical products, tubular products (such as, ligament substitute), endless loop (endless loop) product, bag-shaped product, spherical products, support, stent graft, artificial blood vessel, Y shape hollow structure, the edge (skirts) of valve arrangement (such as, cardiac valves and periphery valve) and other medical assembly.
Because use spinning oil to be also less desirable from environmental, be also of value in the method in accordance with the invention preparation be ready to use in other final use product and application in polyethylene yarn, described product and application examples are as rope, electric wire, mooring rope, setline and fishing net, telecontrol equipment, shock resistance and wear resistant products and ballistic resistant products.
Embodiment
embodiment 1: preparation HPPE yarn, wherein online stretching before torsion
Fig. 1 a) shows the flow chart of the method preparing Polyolefin multifilament yarns, wherein carries out before reversing and reverses online stretching.After torsion, before (after a while) carries out off line " torsion after-drawing ", part stretching multifilament yarn is wound on winding reel (bobbin).Can reverse in the torsion of combination and winder unit (such as, commercially available from Alma-Sauer, Dietze & Schell, Galan and Barmag company) and jointly can carry out with the winding part multifilament yarn that stretches.Carry out reversing and reeling in the step can also separated at 2, in this case, can at such as US 6,155, carry out torsion in method and apparatus disclosed in 037 and such as can reel on precision cross winding machine (such as purchased from SSM, Dietze & Schell, Comoli, Leesona, Georg Sahm GmbH, Oerlikon and Barmag).(that is, off line) reverses after-drawing through the part drawing reeled and reverse after a while.This corresponds to the method shown in Fig. 1 a, wherein except the online stretching (8) carried out before torsion (12), can also carry out off line stretching (10) before online stretching (8).
embodiment 2: preparation HPPE yarn, wherein online stretching before and after torsion
Fig. 1 b) show the flow chart of the method preparing Polyolefin multifilament yarns, wherein carried out before and after reversing and reverse online stretching.Can utilize such as US 6,155, the twist cell of type disclosed in 037 is reversed, wherein during transfer by the yarn of the online torsion operation of twist cell.A kind of embodiment b in stretching variants) in, adopt a large its twisting step to reach the twist of expectation.Another kind of embodiment c in stretching variants) in, adopt multiple less its twisting step (such as 2,3,4,5,6,7,8,9 or 10 its twisting step) to reach the twist of expectation.Multiple less stretching step can be arranged in the group of the stretching step between multiple less stretching step or between stretching step.As Fig. 1 b) as shown in, except except the online stretching reversing (8) before (12) and (14) afterwards, can before online stretching and its twisting step (8,12,14) (10) or afterwards (16) optionally adopt one or more off line stretching step.
embodiment 3: preparation HPPE yarn, wherein online stretching after torsion
Fig. 1 c) show the flow chart of the method preparing Polyolefin multifilament yarns, wherein carry out after reversing and reverse online stretching.In this case, to stretch multifilament yarn by preparing part as follows: such as stretch in the first stretching furnace (10) are spun into (as-spun) multifilament yarn, then such as purchased from winding part stretching multifilament yarn on the Twinstar precision cross winding machine of Georg Sahm GmbH.After a while, stretched portion stretching multifilament yarn is after twisting reversed also.Reverse preferably occur in combination torsion and unwinding equipment on, the such as commercially available torsion barrel subrack from such as Alma-Sauer, Dietze & Schell, Galan and Barmag.Or, can by independent unwinder and such as US 6,155, the twist cell combination of type disclosed in 037.After online torsion after-drawing (14), optionally further for yarn off line is stretched (16).The advantage of this embodiment is: can utilize the meticulous adjustment unwinding of drawing process and torsion, and start fast when allowing to relate to broken yarn and stop.In addition, compared with the stretching variants of embodiment 4, traceability is easier to process, because relate to less off line process.
embodiment 4: preparation HPPE yarn, wherein off line stretches before and after torsion
Fig. 1 d) show the flow chart of the method preparing Polyolefin multifilament yarns, wherein before and after torsion, off line stretches.Preparation part as described in example 3 above stretches multifilament yarn as follows: such as stretch in the first stretching furnace (10) are spun into (as-spun) multifilament yarn, then such as purchased from winding part stretching multifilament yarn on the Twinstar precision cross winding machine of Georg Sahm GmbH.Subsequently, in the time after a while, at torsion and the upper reverse part stretching multifilament yarn of recoiling facility (such as commercially available from such as SSM, Dietze & Schell, Comoli, Leesona, Georg Sahm GmbH, Oerlikon and Barmag).Finally, in the time after a while, such as, in another stretching furnace, carry out torsion after-drawing.The advantage of this embodiment is: it allows the correlation improving multifilament yarn in simple cluster (constellation), and does not need to make torsion equipment mate/alinement (alignment) with one or more stretching station.But, because this processing step is that off line is carried out, so need handled traceability.
embodiment 5: preparation part stretching HPPE yarn
The winding reel of following preparation part stretching UHMWPE yarn: prepare the solution of UHMWPE in decahydronaphthalenes in an extruder, by having the spinning head spinning solution of 200 spinneret orifices, quench in hardening bath, partly stretch the yarn be spun into the spin solvent removed from yarn more than 99% compared with the content of spin solvent of solution.Spinning oil is not provided during the method.Finally, by reel for yarn around on a bobbin, each winding reel holds about 9000m.
embodiment 6: preparation HPPE yarn, wherein online stretching after torsion
To make in embodiment 5 winding reel of the part stretching UHMWPE yarn of preparation stand as Fig. 1 c) described in online drawing process, the online torsion after-drawing ratio wherein used is 4, and via torsion barrel subrack unwinder to stretching furnace charging.Use the twist of 9 turns/meter and 12 turns/meter.Off line is not used to reverse after-drawing and do not provide spinning oil during the method.
| The twist | 9 turns/meter | 12 turns/meter |
| The sum of winding reel | 75 | 17 |
| The minimum number of defects of each winding reel | 0 | 0 |
| The greatest drawback number of each winding reel | 16 | 10 |
| The average number of defects of each winding reel | 3 | 1.5 |
Therefore, observe: when the twist improves, the greatest drawback number of each winding reel and the average number of defects of each winding reel reduce.
comparative example 1: preparation HPPE yarn, does not wherein utilize torsion
The online torsion of 0 turn/meter is adopted to repeat embodiment 6.The yarn produced demonstrates low-down coherence and after final stretching, can not prepare stable winding reel.
embodiment 7: preparation HPPE yarn, wherein adopted off line to stretch before and after torsion
To make in embodiment 5 winding reel of the part stretching UHMWPE yarn of preparation stand as Fig. 1 d) described in off line drawing process.By the separating step using annular twisting mill (ring-twister) unwinding, close wind and employing cross winding to recoil, provide the twist of 16 turns/meter.Subsequently, the off line of 4 is adopted to reverse after-drawing ratio, the winding reel of the UHMWPE yarn through partly stretching and reverse that stretches.Spinning oil is not provided in torsion or during reversing after-drawing process.
Prepare two batches of winding reels (each about 400g).
1st batch: 50 winding reels, wherein 16 winding reels have one or more defect
2nd batch: 75 winding reels, wherein 24 winding reels have one or more defect
Therefore, observe: although do not add spinning oil during the method, utilize the method comprising torsion yarn and reverse after-drawing to achieve very high quality level and high coherence.
comparative example 2: preparation HPPE yarn, does not wherein utilize torsion
Adopting the recoil without reversing, repeating embodiment 7.The yarn produced demonstrates low-down coherence and after final stretching, can not prepare stable winding reel.
From the single feature of embodiments of the present invention as herein described or the combination of feature and significantly variant can with the Feature Combination of other embodiment as herein described or exchange, unless those skilled in the art recognize that produced embodiment can not be implemented completely immediately.
ref. No. in figure
2: mixing
4: spinning
6: quenching is remove portion solvent also
7: stretch
8: online stretching
10: off line stretches
12: reverse
13: reverse after-drawing
14: online torsion after-drawing
16: off line reverses after-drawing
18: unstretched yarn
20: multifilament yarn
Claims (15)
1. manufacture the method for multifilament yarn, described method comprises the steps:
-part stretching multifilament yarn is provided, described part stretching multifilament yarn comprises partially drawn yarn,
-described part stretching multifilament yarn reversed to the part stretching twist be 4 turns/meter to 600 turns/meter to form the part stretching multifilament yarn through reversing; Preferably, described part drawing is reversed to the part stretching twist be 10 turns/meter to 500 turns/meter; More preferably, described part drawing is reversed to the part stretching twist be 12 turns/meter to 200 turns/meter, and
-draw ratio DR with at least 1.1
ptthe DR of torsion after-drawing, preferably at least 1.5
ptthe DR of torsion after-drawing, more preferably at least 2
ptthe DR of torsion after-drawing, most preferably at least 3
ptreverse the part stretching multifilament yarn through reversing described in after-drawing.
2. method according to claim 1, the wherein said part stretching twist/DR
pt2-250 turn/rice between; Preferably, the described part stretching twist/DR
pt2-120 turn/rice between.
3. method according to claim 1 and 2, at least one silk in wherein said part stretching multifilament yarn is selected from the group be made up of (coloured) Polyester Filament, HD polyethylene filament, UHMWPE silk, polyacrylic fibres; Preferably, described part stretching multifilament yarn comprises the UHMWPE silk of at least 75 number %; More preferably, described part stretching multifilament yarn comprises the UHMWPE silk of at least 90 number %; And most preferably, the silk of described part stretching multifilament yarn is made up of UHMWPE silk.
4. the method according to any one of claim 1-3, wherein reversing described part stretching multifilament yarn and reversing after-drawing is online carrying out.
5. the method according to any one of claim 1-4, is wherein undertaken reversing described part drawing by Uster twist system.
6. the method according to any one of claim 1-5, wherein by carrying out reversing described part drawing as follows: first reel without the part stretching multifilament yarn reversed, torsion barrel subrack system is adopted to make the unwinding of described part stretching multifilament yarn to reverse described part stretching multifilament yarn subsequently, preferably, arrange described torsion barrel subrack system to carry out unwinding and torsion with torsion after-drawing technique is online, wherein adjust the withdrawal speed of described torsion barrel subrack system and rotary speed to adapt to online torsion after-drawing technique.
7. the method according to any one of claim 5 or 6, its also comprise the steps: torsion described part drawing after and before the described part drawing that stretches after twisting, in stretch-draw station, strain described multifilament yarn.
8. the method according to any one of claim 1-7, wherein with at the most 100 draw ratio DR
pt, preferably at the most 25 DR
pt, more preferably at the most 10 DR
ptreverse part stretching multifilament yarn described in after-drawing to form HPPE multifilament yarn.
9. from gel spinning multifibres polyethylene yarn, remove the method for spin solvent, it comprises the steps:
-multifilament yarn is provided, it comprises polyolefin filaments and spin solvent,
-to reverse described yarn to the twist be that 10-200 turns/rice, and
-reverse described yarn after, from described multifilament yarn, remove described spin solvent at least partially.
10. method according to claim 9, wherein during the described multifilament yarn of torsion, based on the weight of polyethylene and spin solvent, the content of spin solvent of described multifilament yarn is 10ppm-1000ppm; Preferably, based on the weight of polyethylene and spin solvent, the content of spin solvent of described multifilament yarn is 20ppm-500ppm.
11. methods according to claim 9, wherein during the described multifilament yarn of torsion, based on the weight of polyethylene and spin solvent, the content of spin solvent of described multifilament yarn is at least 0.1 weight-%, preferably the content of spin solvent of described multifilament yarn is at least 0.5 weight-%, more preferably the content of spin solvent of described multifilament yarn is at least 2 weight-%, and more preferably the content of spin solvent of described multifilament yarn is at least 10 weight-%.
12. methods according to any one of claim 9-11, wherein after the described multifilament yarn of torsion, the spin solvent existed during the torsion of removing at least 10 weight-%; Preferably, after the described multifilament yarn of torsion, the spin solvent existed during the torsion of removing at least 90 weight-%; Most preferably, after the described multifilament yarn of torsion, the spin solvent existed during the torsion of removing at least 99 weight-%.
13. methods according to any one of claim 9-12, it also comprises the steps: the draw ratio DR with at least 1.1
pt, preferably at least 1.5 DR
pt, more preferably at least 2 DR
pt, most preferably at least 3 DR
ptreverse multifilament yarn described in after-drawing to form HPPE multifilament yarn.
The method of 14. manufacture gel spinning HPPE multifilament yarns, it comprises the steps:
-solution of UHMWPE in spin solvent (based on the UHMWPE in solution and spin solvent) of 3-25 weight-% is provided,
-by solution described in the spinning head spinning with at least 2 spinneret orifices, in hardening bath, make described solution quench to form the solid-state multifilament yarn comprising part drawing polyolefin silk,
-from described solid-state multifilament yarn, remove described spin solvent at least partially,
-described part stretching multifilament yarn reversed to the twist be 10-600 turn/rice to form the part stretching multifilament yarn through reversing,
-draw ratio DR with at least 1.1
ptreverse part stretching multifilament yarn through reversing described in after-drawing to form HPPE multifilament yarn,
-wherein carry out when not adding spinning oil in described multifilament yarn reversing, removing spin solvent and reverse after-drawing.
15. methods according to claim 14, it also comprises the steps: the spin solvent (spin solvent based in solution) removing at least 99.5 weight-%; Preferably, the spin solvent of at least 99.9 weight-% is removed; More preferably, the spin solvent of at least 99.95 weight-% is removed.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361756577P | 2013-01-25 | 2013-01-25 | |
| EP13152764 | 2013-01-25 | ||
| EP13152764.0 | 2013-01-25 | ||
| US61/756,577 | 2013-01-25 | ||
| PCT/EP2014/051534 WO2014114793A2 (en) | 2013-01-25 | 2014-01-27 | Method of manufacturing a drawn multifilament yarn |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104955992A true CN104955992A (en) | 2015-09-30 |
| CN104955992B CN104955992B (en) | 2017-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480005797.2A Expired - Fee Related CN104955992B (en) | 2013-01-25 | 2014-01-27 | The method of manufacture stretching multifilament yarn |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20150361588A1 (en) |
| EP (2) | EP2948579B1 (en) |
| JP (1) | JP2016508549A (en) |
| KR (1) | KR20150110550A (en) |
| CN (1) | CN104955992B (en) |
| BR (1) | BR112015017564A2 (en) |
| CA (1) | CA2897906A1 (en) |
| EA (1) | EA201500766A1 (en) |
| HK (1) | HK1215287A1 (en) |
| MX (1) | MX344520B (en) |
| WO (1) | WO2014114793A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109355798B (en) * | 2018-08-21 | 2020-06-30 | 巢湖市大江渔具有限公司 | Method for manufacturing fishing net with suspension function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0655628A (en) * | 1992-08-11 | 1994-03-01 | Toyobo Co Ltd | Manufacture of modified ultra-high-molecular-weight polyolefin stretched material |
| CN101050562A (en) * | 2007-04-25 | 2007-10-10 | 华东理工大学 | Monofilament fiber in polyolefin class |
| CN101273158A (en) * | 2005-07-18 | 2008-09-24 | 帝斯曼知识产权资产管理有限公司 | Polyethylene multi-filament yarn |
| CN101568672A (en) * | 2006-08-23 | 2009-10-28 | 霍尼韦尔国际公司 | Process for the preparation of UHMW multi-filament poly(alpha-olefin) yarns |
| CN101688332A (en) * | 2007-05-01 | 2010-03-31 | 帝斯曼知识产权资产管理有限公司 | Uhmwpe fiber and process for producing thereof |
| KR20120057904A (en) * | 2010-11-29 | 2012-06-07 | 코오롱글로텍주식회사 | Polypropylene fiber with auto temperature control, manufacturing method of the same, and fabric prepared from the same |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4112667A (en) * | 1977-02-22 | 1978-09-12 | Phillips Petroleum Company | Apparatus and process suitable for twist-drawing a yarn |
| NL8104728A (en) * | 1981-10-17 | 1983-05-16 | Stamicarbon | METHOD FOR MANUFACTURING POLYETHENE FILAMENTS WITH GREAT TENSILE STRENGTH |
| DE3675079D1 (en) * | 1985-06-17 | 1990-11-29 | Allied Signal Inc | POLYOLEFIN FIBER WITH HIGH STRENGTH, LOW SHRINKAGE, ULTRA-HIGH MODULE, VERY LOW CRAWL AND WITH GOOD STRENGTH MAINTENANCE AT HIGH TEMPERATURE AND METHOD FOR THE PRODUCTION THEREOF. |
| NL8901266A (en) | 1989-05-19 | 1990-12-17 | Stamicarbon | METHOD FOR MANUFACTURING A STRETCHED ROPE |
| DE59805177D1 (en) * | 1997-12-03 | 2002-09-19 | Zellweger Luwa Ag Uster | rotating body |
| JP4389142B2 (en) | 2001-08-08 | 2009-12-24 | 東洋紡績株式会社 | Method for producing high-strength polyethylene fiber |
| AU2003295250A1 (en) | 2002-12-10 | 2004-06-30 | Dsm Ip Assets B.V. | Process for making and process for converting polyolefin fibres |
| RU2495969C2 (en) | 2004-01-01 | 2013-10-20 | ДСМ АйПи ЭССЕТС Б.В. | Method of complex thread from high-quality polyethylene |
| IL167566A (en) | 2004-08-16 | 2010-12-30 | Dsm Ip Assets Bv | Methods of preparation of monolayers and bilayers comprising ultra high molecular weight polyethylene and ballistic resistant articles manufactured therefrom |
| EP1847276A1 (en) * | 2006-04-20 | 2007-10-24 | DSMIP Assets B.V. | Twisted suture |
| JP2008266843A (en) * | 2007-04-23 | 2008-11-06 | Ygk:Kk | Polyolefin yarn and method for producing the same |
| US7966797B2 (en) * | 2008-06-25 | 2011-06-28 | Honeywell International Inc. | Method of making monofilament fishing lines of high tenacity polyolefin fibers |
| CN103097596A (en) * | 2010-09-21 | 2013-05-08 | 株式会社高纤 | Super-high-molecular-weight polyolefin yarn, method for producing same, and drawing device |
-
2014
- 2014-01-27 EA EA201500766A patent/EA201500766A1/en unknown
- 2014-01-27 EP EP14701413.8A patent/EP2948579B1/en not_active Not-in-force
- 2014-01-27 KR KR1020157020134A patent/KR20150110550A/en not_active Application Discontinuation
- 2014-01-27 BR BR112015017564A patent/BR112015017564A2/en not_active IP Right Cessation
- 2014-01-27 JP JP2015554180A patent/JP2016508549A/en active Pending
- 2014-01-27 CN CN201480005797.2A patent/CN104955992B/en not_active Expired - Fee Related
- 2014-01-27 EP EP16159435.3A patent/EP3051010A1/en not_active Withdrawn
- 2014-01-27 US US14/762,212 patent/US20150361588A1/en not_active Abandoned
- 2014-01-27 WO PCT/EP2014/051534 patent/WO2014114793A2/en active Application Filing
- 2014-01-27 MX MX2015009421A patent/MX344520B/en active IP Right Grant
- 2014-01-27 CA CA2897906A patent/CA2897906A1/en not_active Abandoned
-
2016
- 2016-03-21 HK HK16103250.1A patent/HK1215287A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0655628A (en) * | 1992-08-11 | 1994-03-01 | Toyobo Co Ltd | Manufacture of modified ultra-high-molecular-weight polyolefin stretched material |
| CN101273158A (en) * | 2005-07-18 | 2008-09-24 | 帝斯曼知识产权资产管理有限公司 | Polyethylene multi-filament yarn |
| CN101568672A (en) * | 2006-08-23 | 2009-10-28 | 霍尼韦尔国际公司 | Process for the preparation of UHMW multi-filament poly(alpha-olefin) yarns |
| CN101050562A (en) * | 2007-04-25 | 2007-10-10 | 华东理工大学 | Monofilament fiber in polyolefin class |
| CN101688332A (en) * | 2007-05-01 | 2010-03-31 | 帝斯曼知识产权资产管理有限公司 | Uhmwpe fiber and process for producing thereof |
| KR20120057904A (en) * | 2010-11-29 | 2012-06-07 | 코오롱글로텍주식회사 | Polypropylene fiber with auto temperature control, manufacturing method of the same, and fabric prepared from the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104955992B (en) | 2017-10-10 |
| KR20150110550A (en) | 2015-10-02 |
| WO2014114793A3 (en) | 2014-10-30 |
| JP2016508549A (en) | 2016-03-22 |
| HK1215287A1 (en) | 2016-08-19 |
| US20150361588A1 (en) | 2015-12-17 |
| CA2897906A1 (en) | 2014-07-31 |
| WO2014114793A2 (en) | 2014-07-31 |
| EP2948579B1 (en) | 2016-11-09 |
| BR112015017564A2 (en) | 2017-07-11 |
| EP3051010A1 (en) | 2016-08-03 |
| EA201500766A1 (en) | 2016-01-29 |
| EP2948579A2 (en) | 2015-12-02 |
| MX344520B (en) | 2016-12-16 |
| MX2015009421A (en) | 2015-09-24 |
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