EP2499283A1

EP2499283A1 - Spun-dyed hmls monofilaments, production thereof and use thereof

Info

Publication number: EP2499283A1
Application number: EP10776561A
Authority: EP
Inventors: Kurt-Günther BERNDT; Rex Delker; Reinhardt Schenzinger; Andreas Dirr
Original assignee: Nextrusion GmbH
Current assignee: Nextrusion GmbH
Priority date: 2009-11-12
Filing date: 2010-10-21
Publication date: 2012-09-19
Anticipated expiration: 2030-10-21
Also published as: PT2499283E; EP2499283B1; DK2499283T3; US20120244336A1; WO2011057708A1; DE102009052935A1

Abstract

The invention relates to spun-dyed monofilaments made of polyesters having high dimensional stability, containing a selected dye. Dyes comprising perylene pigments are preferred. Polyesters that are modified to be permanently flame-retardant are especially preferred as the starting raw material. Said monofilaments can be used preferably in light-weight roof constructions, shading elements, facade claddings and other decorative textile articles in or on buildings. Said filaments are characterised by good resistance to light and low heat absorption.

Description

description

Spun-dyed HMLS monofilaments, their preparation and use

The present invention relates to spun-dyed HMLS monofilaments, their preparation and use in the construction sector. These monofilaments may preferably be used in the construction sector in the form of textiles, e.g. for lightweight roof structures for shading or facade cladding.

For technical applications, synthetic filaments of melt-spinnable polymers are preferred. For reasons of cost, use is made of standard polymers which have been known for a long time, for example polyolefins such as polyethylene (PE), polypropylene (PP), polyamides such as polyamide 6 (PA 6), polyamide 6.6 (PA 6.6) or polyesters such as polyethylene terephthalate (US Pat. PET), if threads made of these polymers can meet the desired requirements.

In technical textile applications, dimensional stability is often desired. A textile thread is all the more dimensionally stable, the lower its mechanical elongation and shrinkage under the influence of temperature. As a measure of these quantities, the force-strain curve ("KD curve") of a textile thread is used.This curve increases more or less steeply depending on the raw material used.The beginning of the curve is usually reversible Scope of Hooke's Law, ie that the strain is proportional to the applied force. At higher strains, the force-strain diagram ("KD diagram") is no longer linear, and as a rule the strain is no longer reversible.As the force and strain increase, the curve reaches a maximum until the thread tears.

For most technical applications, efforts are made to stay in the linear part of the KD curve. The steeper this curve increases, the higher the modulus of elasticity. It is defined as the slope of the tangent of the KD curve at zero point, ie at 0% strain. In practice one usually uses the secant, which cuts the KD curve at 0% and 1% strain, or also the secant at 0.5% and 1.0% strain; the gradients of these two

Secants as well as the tangent to the curve at 0% strain hardly differ from each other. In practical application, one tries to provide threads that remain in use in the linear part of the KD curve. One solution is to choose the denier of the threads so strong that the linear forces of the KD diagram are not exceeded in the forces occurring. Another solution is to provide threads with high moduli of elasticity. A high modulus is achieved e.g. by extremely high draws of the synthetic threads, since in this case the molecular chains are largely oriented. This results in only a small residual strain until the thread break.

Another measure of the dimensional stability of synthetic threads is thermal shrinkage: at high temperatures, the mobility of the fibers increases

Molecular chains. The higher the chains are oriented, the higher is the shrinkage of the thread.

Although a high modulus (stretching) achieves a high modulus, this generally comes at the price of high thermal shrinkage and vice versa. As a measure of the dimensional stability, it is therefore preferable to use the sum of the elongation and the shrinkage. The elongation at break is less suitable for this because it is subject to certain fluctuations. Preferably, the strain at a given force, called a reference strain is selected. In English one speaks of the EASL (Elongation At Specific Load).

The same applies to the shrinkage. Preferably, the free shrink is specified, i. shrinkage without biasing of the thread used in the treatment of the thread at a fixed temperature, e.g. at 180 ° C, after a defined exposure time, for example 30 min., occurs. However, this of course depends on the polymer used.

For a normal polyester thread of PET, e.g. the reference elongation (BD) at 27 cN / tex and the free thermal shrinkage (TS) of 180 ° C are selected. Typical values for "slowly" spun and subsequently drawn PET threads are included

BD + TS = 25%.

The sum of the two quantities remains approximately constant when a parameter is varied. This sum of reference elongation and thermal shrinkage is therefore ideal as a measure of the dimensional stability. For technical yarns are threads with high modulus and low

Desirable shrinking properties, so-called high modulus low shrinkage types ("HMLS types").

It is known to the person skilled in the art that, with a high spin delay, that is to say the ratio between the withdrawal speed and the injection speed in the spinning process, the molecular chains are extensively oriented in the longitudinal direction. In a subsequent post-stretching the molecular chains are further oriented and crystallized. This achieves high modules and because of the

partially crystalline fraction also low shrinkage values. HMLS monofilaments or HMLS multifilaments and cords made therefrom are already known. Such threads and their production are described for example in DE 196 53 451 A1, DE 199 37 728 A1, DE 691 26 914 T2, DE 699 26 056 T2, EP 1 571 243 A1, WO 2004/046434 A1 and DE 691 08 785 T2 described. HMLS multifilaments have been used primarily as a tire cord in the past. HMLS monofilaments have also been proposed for this use.

The spinning distortion and the crystallization are influenced by the viscosity of the polymer, the type of polymer, crosslinking agent, other possible additives and the cooling process below the spinneret, as shown in numerous documents.

Expressed as dimensional stability from BD + TS, values of 6% to 8% for PET are achievable here as e.g. for tire cord use find.

In order to achieve the high spinning distortions, take-off speeds of> 2000 m / min are typical. Technical multifilament yarns generally have a single denier of 5 - 8 dtex. With the cooling usual for multi-parliamentary games in the air stream after the spinneret, no problems arise at these take-off speeds.

With monofilaments the conditions are different. Due to the comparatively high titer of these individual filaments, for example, between 40 dtex and 1000 dtex or at diameters of about 64 pm to 300 pm sufficient air cooling is no longer possible because the energy can not be transported away fast enough. As a cooling medium is therefore in the Usually a spinning tank with water used. Due to the associated friction, take-off speeds above 2000 m / min are not possible. Depending on the titer or diameter of the monofilament, the take-off speed should not exceed 250 to 300 m / min.

Monofilaments intended for use in the construction sector should be flame-retardant and must contain certain additives, such as dyes and preferably also stabilizers. The skilled artisan expects aggregates to adversely affect HMLS properties. These are usually added as a masterbatch to the base polymer before spinning. Because of the better

Incorporation and dispersion into the base polyester, the masterbatches are often based on polymers softer than the base polyester, for example on polybutylene terephthalate ("PBT") or on copolymers The use of these polyesters leads to a deterioration of the dimensional stabilities compared to monofilaments It is an object of the present invention to provide HMLS monofilaments which can be used in the construction sector and which are distinguished by good HMLS properties.

Another object of the present invention is to provide a simple process for producing spun-dyed HMLS monofilaments.

The present invention relates to a spun-dyed polyester monofilament having a titre of at least 40 dtex containing at least one pigment selected from the group of phthalocyanine, metallophthalocyanine, pyrazolone, anthraquinone, dioxazine, sulfur, azo, dibenzanthrone and / or perylene pigments, wherein the sum of free heat shrinkage after 30 minutes treatment at 180 ° C and from reference strain at 27 cN / tex from the force-elongation diagram of the polyester monofilament is less than 15%.

As polyester for the monofilaments according to the invention, any thread-forming polyesters can be used, provided that they can be processed into HMLS monofilaments having the property profile described above.

Typically, these are monofilaments of aromatic-aliphatic polyester homo- or copolymers. Examples are

Polyethylene terephthalate homopolymers or copolymers containing

Ethylene terephthalate. These preferred polymers are derived from ethylene glycol and optionally further alcohols and from

Terephthalic acid or its polyester-forming derivatives, such as

Terephthalic acid esters or chlorides.

In addition to or instead of ethylene glycol, these polyesters may contain structural units derived from other suitable dihydric alcohols. Typical representatives thereof are aliphatic and / or cycloaliphatic diols, for example propanediol, 1,4-butanediol, cyclohexanedimethanol or mixtures thereof. In addition to or instead of terephthalic acid or its polyester-forming derivatives, these polyesters may contain structural units derived from other suitable dicarboxylic acids or from their polyester-forming derivatives. Typical representatives thereof are aromatic and / or aliphatic and / or cycloaliphatic dicarboxylic acids, for example naphthalenedicarboxylic acid, isophthalic acid, cyclohexanedicarboxylic acid, adipic acid,

Sebacic acid or mixtures thereof. It can also monofilaments of other polyesters, such as

Polybutylene terephthalate, polypropylene terephthalate, polyethylene naphthalate homopolymer or copolymers containing ethylene naphthalate units.

These thermoplastic polyesters are known per se. Building blocks of thermoplastic copolyesters are preferably the abovementioned diols and dicarboxylic acids, or correspondingly constructed polyester-forming derivatives.

The monofilaments according to the invention are preferably derived from polyesters whose solution viscosities (IV values) are at least 0.60 dl / g, preferably from 0.80 to 1.05 dl / g, particularly preferably from 0.80 to 0.95 dl / g, (measured at 25 ° C in dichloroacetic acid (DCE)).

The monofilaments according to the invention are spun-dyed. The color of the monofilament, preferably black, is particularly desirable for shadowing. As pigments, the above types can be used. These are mainly color bodies in the

Base polymer are not soluble and are finely dispersed in the form of a heterogeneous phase in the base polymer.

Pigments suitable for producing the monofilaments according to the invention are known to the person skilled in the art.

In direct sunlight, in particular, the IR component is absorbed in the monofilament, this being at temperatures above the

Heat up glass conversion. This makes the construction "soft" and can deform. To counteract the invention is preferably a

Perylene pigment used. This is particularly preferably used in the form of a black masterbatch containing perylene pigment; in particular, the product Lifocolor black VP 132-08 TPE from Lifocolor Farben GmbH & Co KG, Lichtenfels, is particularly suitable for this purpose. Perylene is heat resistant and absorbs less IR radiation than, for example, an otherwise common carbon black as a dye.

As perylene pigments, it is possible to use any desired compounds having a perylene basic body which, when incorporated into a matrix containing thermoplastic polyesters, result in a coloration of the polyester.

Particularly suitable classes of perylene pigments are perylene itself, ie peri-dinaphthylene, the perylene derivatives. Examples of perylene derivatives are tetracarboxylic acids of perylene, their derivatives, such as dianhydrides, diimides including the bis-N-hydrocarbyldiimide as the bis-N-alkyldiimides, tetracarboxylic or tetracarboxylic; Di-, tri- or tetraalkyl derivatives of perylene, di- or tetraketones of perylene, di-, tri- or tetrahydroxy derivatives of perylene, di-, tri- or tetra-ethers of perylene.

Particularly preferred perylene, 3,4,9,10-perylenetetracarboxylic dianhydride, 3,4,9,10-tetracarboxylic dianhydride, 3,4,9, 10-tetracarboxylic diimide and / or N, N ^{'-dimethyl-3,} 4,9, 10-tetracarboxylic diimide used.

The particular type of pigment selected for use depends on its compatibility with the polyester matrix and the particular shade desired for the onofilament. The person skilled in the selection criteria are known. The pigment in the monofilament according to the invention can be used alone or in the form of mixtures, optionally in combination with other pigments. For example, the pigments can be in the form of dry

Pigments, liquid pigments, encapsulated pigments, pigment dispersions or most preferably in the form of a masterbatch with a carrier polymer, for example a polyolefin, a

thermoplastic polyester or a thermoplastic elastomeric polymer. The incorporation of the pigment into the thermoplastic polyester can be carried out by various methods described in the prior art. These include e.g. mixing the pigment with the polyester or dissolving and / or dispersing the pigment in the polyester. In a preferred embodiment, the inventive

Monofilament in addition to the thermoplastic polyester and the pigment as a further component, a polymer having a melting point in the range or below the melting point of the thermoplastic polyester, preferably of at least 10 ° C below the melting point of the thermoplastic polyester.

As a further polymer component selected polymers are used. This is usually the polymer component of a masterbatch used in the preparation of the monofilaments according to the invention. To ensure adequate ductility and miscibility in the

To ensure extruder, the melting point of the other polymer should be in the range of the melting point or preferably at least 10 ° C below the melting point of the polyester of the base component. Examples of suitable further polymers are polyesters, polyamides,

Polyolefins, such as polyethylene or polypropylene, or thermoplastic, elastomeric polymers. Most preferably, a masterbatch contains the same type of polymer as the base polymer.

The pigments are in the masterbatch used according to the invention

dispersed. The masterbatch is introduced into the polyester matrix during the production of the monofilament. The pigment molecules stain that

Monofilament. Surprisingly, it has been shown that the pigment on the one hand dyes the monofilament, on the other hand, absorbs heat radiation only to a limited extent and reflects the main part of the irradiation, so that the monofilament heats up less by irradiation of sunlight than would be the case when coloring with carbon black.

In a further preferred variant, the inventive

Monofilaments flame retardant equipped. In this variant, the flame retardancy is another important property of the monofilament according to the invention. Appropriately equipped monofilaments are used for reasons of fire protection in the construction sector. Thus, non-flammable or flame-retardant materials are used for textile construction. In these preferred monofilaments according to the invention, the

Fire protection can be achieved by the use of known flame retardants. Alternatively or in addition thereto, the polyester raw material used for the production of the monofilament according to the invention may also be flame-retardant. As a flame-retardant PET raw material, a wide variety of raw materials have proven their worth here; for example, the raw material types RT 16, RT 18 and RT 1802 Trevira GmbH, Philipp-Reis-Straße 2, 65795 Hattersheim.

These flame-retardant polyester raw materials contain phosphorus-containing

Structural units in the polymer backbone and have been known in the market for years. Using these raw materials, one obtains almost the same textile-physical properties as described above with "pure" PET.

Preference is given to monofilaments containing flame-retardant additives, in particular in the form of phosphorus-containing and / or halogen-containing

Links.

Particular preference is given to monofilaments composed of phosphorus

containing polyester is constructed, most preferably with

Phosphorus-containing monomers modified polyethylene terephthalate.

In a further preferred variant, the monofilaments according to the invention are provided with a friction-reducing additive. Particularly preferred friction reducing additives are used, in addition to

Fatty acid amide or mixtures of different fatty acid amides in addition phosphites and mineral powder, preferably calcium carbonate.

Phosphites act as costabilizers and mineral powders act as

Nucleating agent. Particularly preferred such friction-reducing additives are incorporated in the form of a masterbatch in the Monofiiament. In particular polyolefins, such as polyethylene or polypropylene, or polyesters, such as polyethylene terephthalate or as

Polybutylene terephthalate used. Particularly suitable fatty acid amides are amides of saturated or unsaturated carboxylic acids having from six to twenty carbon atoms. Preference is given to using oleic acid amide, in particular in combination with other fatty acid amides.

The monofilaments equipped with additives containing friction-reducing and fatty acid amides, in addition to a markedly reduced static friction and sliding friction, additionally show markedly increased soil repellency. Without wishing to be bound by theory, it is assumed that the polyester matrix of the monofilament is constantly fatty acid amide, in particular Oleic amide, since its surface energy is greater than that of polyester. This leads to a permanent lowering of the wettability of the polyester surface, which leads to a reduction of soiling by liquids.

The monofilaments according to the invention may contain, in addition to the polyester base material and the pigment, optionally further polymers, optionally flame retardants and optionally friction-reducing additives, further additives.

Examples of other additives are UV stabilizers, hydrolysis stabilizers, processing aids, antioxidants, plasticizers, other lubricants, other pigments, viscosity modifiers or

Crystallization accelerator.

Examples of UV stabilizers are UV-absorbing compounds, such as benzophenones or benzotriazoles, or compounds of the HALS type

(Hindered amine light stabilizer) - Examples of hydrolysis stabilizers are carbodiimides or epoxidized compounds.

Examples of processing aids are siloxanes, waxes or longer-chain carboxylic acids or their salts, aliphatic, aromatic esters or ethers.

Examples of antioxidants are phosphorus compounds such as phosphoric acid esters or hindered phenols.

An example of a plasticizer is dioctyl phthalate.

Examples of other lubricants are polyolefin waxes. Examples of further pigments or matting agents are inorganic pigments, such as titanium dioxide, or carbon black or graphite. Examples of viscosity modifiers are polybasic carboxylic acids and their esters or polyhydric alcohols.

The monofilament according to the invention particularly preferably contains

at least one UV stabilizer.

The titer of the monofilaments according to the invention is at least 40 dtex, but otherwise can vary within wide limits. Typical titres are in the range from 40 to 300 dtex, in particular in the range from 45 to 200 dtex.

The cross-sectional shape of the threads according to the invention can be arbitrary. It may be irregular cross sections, point or axisymmetric cross sections, for example, round, oval or n-shaped

Cross sections, where n is greater than or equal to 3.

The amounts of base polymer, pigment, further polymer and other additives in the monofilaments according to the invention can be selected within wide limits. The monofilament according to the invention usually contains from 70 to 99.999% by weight, preferably from 95 to 99.98% by weight, of the base polymer, based on the total mass of the monofilament. The amount of the base polymer is selected by the skilled person depending on the intended use and / or the intended processing. The amount of pigment in the monofilament according to the invention is also selected by the person skilled in the art as a function of the intended use and / or the intended processing. The amount of pigment in the monofilament according to the invention is usually from 0.0001 to 5% by weight, based on the total mass of the

Monofilaments, preferably the amount of the pigment is from 0.001 to 3% by weight. The amount of the optionally present flame retardant in the monofilament according to the invention is likewise selected by the person skilled in the art as a function of the desired intended use and / or the intended processing. Usually, the amount of the flame retardant in the monofilament according to the invention is 0 to 15 wt.%, Based on the total mass of the monofilament, preferably the amount of flame retardant 0.1 to 10 wt.% And especially 1 to 5 wt.%. The amount of the optionally present further polymer in the monofilament according to the invention is also determined by the person skilled in the art as a function of the intended use and / or the intended purpose

Processing selected. Usually, the amount of this component is 0 to 25 wt.%, Based on the total mass of the monofilament.

The proportion of optionally used further additives is selected by the skilled person according to the intended use and / or the intended processing. The proportion of this component is usually up to 20% by weight, preferably up to 10% by weight, based on the total mass of the monofilament.

When UV stabilizers are added, their amount in the monofilament according to the invention is usually from 0.0001 to 5% by weight, based on the total weight of the monofilament, and the amount of UV stabilizer is preferably from 0.001 to 2% by weight.

Needed for the preparation of the monofilaments of the invention

Components are known per se, sometimes commercially available or can be prepared by methods known per se.

The threads of the invention are preferably used for the production of textile fabrics, in particular of woven, laid, knitted, braided or knitted fabrics. The production of these fabrics is carried out by known techniques.

The preparation of the monofilaments according to the invention can be effected by a modification of the conventional melt spinning process, combined with single or multiple stretching and fixing of the obtained

Monofilaments.

The invention also relates to a process of the polyester monofilaments described above. For this purpose, polyester raw material is dosed together with the dye, preferably in the form of a masterbatch in an extruder. The fine bore of the spinneret is larger in cross-sectional area than in spinnerets, which are commonly used for monofilaments of this diameter

Find use. With this measure, the injection speed of the polymer is reduced at the same throughput. With a withdrawal speed of <300 m / min, which can still be implemented with spinning tanks with water, to achieve a spinning distortion, as it is required for the production of HMLS threads. In the method according to the invention, the diameter of the fine bores in the spinneret is typically 0.4 to 1.0 mm, preferably 0.4 to 0.8 mm. By fine bore is meant the bore at the exit end of the polymer mass.

Integrated in the process are one or more draws with

thermal effects that give the thread the final properties.

Preferably, the obtained yarn is drawn several times, in particular a total draw ratio in the range of 1: 5.0 to 1: 6.5.

Particularly preferably, the stretching stages are followed by at least one relaxation stage (fixing stage). In this case, the drawn monofilaments are thermally treated while maintaining the thread tension, so that built-in stresses in the thread can break down.

Subsequently, the monofilaments produced are suitable

Warehouse fed, for example, wound up.

The invention also relates to a process for the preparation of the above

described spun-dyed HMLS monofilaments comprising the following measures:

i) mixing thermoplastic polyester with a masterbatch comprising a filament-forming polymer and at least one pigment selected from the group of phthalocyanine, metallophthalocyanine, pyrazolone, anthraquinone, dioxazine, sulfur, azo,

Dibenzanthrone and / or perylene pigments in an extruder, ii) extruding the mixture from step i) through a spinneret with one or more fine bores having a diameter of

0.4 to 1.0 mm, iii) stripping the formed filament at a drawing speed of less than or equal to 300 m / min, preferably from 200 to 300 m / min, iv) stretching the formed monofilament one or more times, v) relaxing the formed monofilament, and

vi) optionally winding the formed monofilament.

For the dimensional stability of the monofilaments values for BD27cN / tex ⁺ TS ₁₈ ° o can be prepared by the above procedure, typically c / 3omin of less than 15% are achieved. Preference is given to values of less than 12%, in particular values of between 9.5% and 10.1%.

These values are not quite as favorable as with multifilaments, but these monofilaments can still be regarded as HMLS monofilaments which meet the required requirements, for example in textile construction.

It is surprising that the properties of the monofilaments formed, even in the metered addition of masterbatches containing softer polymers than the base polymer, such as PBT or PTE-E, still meet the requirement profile for HMLS filaments.

The monofilaments according to the invention are outstandingly suitable for use in construction, in particular in textile construction, very particularly preferably for lightweight roof structures, shading, facade cladding and textile decorative surfaces in or on buildings.

These uses are also the subject of the present invention.

The present invention will be described in more detail by the following examples. These examples are only illustrative of the invention and are not intended to be limiting. Exemplary embodiments 1 and 2

The starting material in each case was PET type RT 51 from INVISTA

Resins & Fibers GmbH from Hattersheim / M. The raw material was in one

Tumble dryer to a value of IV = 0.823 solids condensed. the

Polymer stream was gravimetrically 2.4 wt% before the extruder Masterbatch Lifocolor black 9000169 TPE (Lifocolor Farben GmbH & Co. KG;

Lichtenfels, Germany), compound of a perylene pigment in one

thermoplastic copolyester, dosed; also 4.0% by weight of one

Masterbatches CESA-F Light NBAADH (Clariant, Frankfurt / M.,

Germany) as a UV stabilizer.

The polymeric mixture was placed in an extruder at 280 ° C to 295 ° C

melted, pressed by means of a gear pump in a spin pack and then spun into a water bath of 50 ° C. There followed one

multiple stretching under heat with heat setting and then the winding of the monofilaments.

In the following table driving data and the textile values are the

given monofilaments indicated.

table

Monofilament Example 1 Monofilament Example 2

Diameter (mm) 0.064 0.126

Addition, additive 1 Lifocolor black 000169 Lifocolor black 9000169

TPE TPE

Addition, additive 2 CESA-F Light CESA-F Light

Extruders, Zones 1-6 (° C) 250-295 250-295

Screw speed (rpm) 29 45

Extruder, pressure (bar) 100 100 Spin pack, mass (° C) 296 298

Spin pack, throughput (g / min) 324 552.6

Addition of additive 1 (%) 2,4 2,4

Addition of additive 1 (g / min) 7.8 13.3

Addition of additive 2 (%) 4.0 4.0

Addition of additive 2 (g / min) 13.0 22.1

Nozzle, number of holes 60 40

Nozzle, hole diameter (mm) 0.5 0.6

Drawframe 1, Galette (m / min) 215 143

1. Drawing (° C) 130 130

Drawframe 2, Galette (m / min) 1030 685

2. Drawing (° C) 250 250

Drawframe 3, Galette (m / min) 1275 850

Fixation, temperature (° C) 238 240

Draw frame 4, Galette (m / min) 1200 800

Fineness (dtex) 45 172.7 spec. Strength (cN / tex) 63 62

Maximum elongation at break (%) 18.3 19.8

Reference strain 27 cN / tex (%) 7.3

Thermal shrinkage 180 ° C / 30 ^' (%) 2.2 2.4

Dimensional stability BD + TS 9.5 10.1

To illustrate the low absorption of IR radiation by perylene in comparison with the carbon black commonly used as a dye, the following comparison is used.

The following table shows the heating rates of monofilaments with carbon black and perylene-containing masterbatch, showing that the perylene-containing monofilament has a similar heating rate to a white monofilament (here TiO 2 -containing). Table: Comparison of the heating rate of monofilaments with different coloring additives

Embodiment 3

The monofilaments were produced in accordance with Examples 1 and 2. In addition to the masterbatches Lifocolor black 9000169 TPE and CESA-F Light NBAADH, between 0 and 10% by weight of a masterbatch based on PBT (Monoslip 230310 PET, U. Müller, Parkstr 18, Coburg) to the polymer stream. In addition to the PBT, this masterbatch contained 20% by weight of a mixture of fatty acid amide and oleic acid amide, 0.5% by weight of a phosphitic co-stabilizer and 15% by weight

Calcium carbonate as nucleating agent.

The monofilaments finished with the components of this masterbatch had significantly reduced coefficients of friction for both static friction and sliding friction compared to the unapertured monofilaments. As a result, it was possible either to work completely without spin finish or to work with a significantly reduced spin finish. In addition, the monofilaments equipped with this masterbatch showed a significantly increased soil repellency. The following table shows driving data and the textile values of the monofilaments obtained. table

Monofilament Example 3

Diameter (mm) 0.126

Addition, additive 1 Lifocolor black 000169

TPE

Addition, additive 2 CESA-F Light

Addition, additive 3 Monoslip 230310 PET

Extruder, Zones 1-6 (° C) 250-295

Screw speed (rpm) 45

Extruder, pressure (bar) 100

Spin pack, mass (° C) 295

Spin pack, throughput (g / min) 553

Addition of additive 1 (%) 2,4

Addition of additive 1 (g / min) 13.3

Addition of additive 2 (%) 4.0

Addition of additive 2 (g / min) 22.1

Addition of additive 3 (%) 5.0

Addition of additive 3 (g / min) 27.7

Nozzle, number of holes 40

Nozzle, hole diameter (mm) 0.6

Drafting system 1, galette (m / min) 14.3

1. Drawing (° C) 130

Drawframe 2, Galette (m / min) 690

2. Drawing (° C) 248

Drawframe 3, Galette (m / min) 857

Fixation, temperature (° C) 236

Drawframe 4, Galette (m / min) 800

Fineness (dtex) 170.9 spec. Strength (cN / tex) 59 Maximum tensile strength elongation (%) 20.8

Reference strain 27 cN / tex (%) 8.0

Thermal shrinkage 180 ° C / 30 ^' (%) 2,4

Dimensional stability BD + TS 10.4

Claims

claims

1. Spun-dyed polyester monofilament having a titer of

at least 40 dtex containing at least one pigment selected from the group of phthalocyanine, metal phthalocyanine, pyrazolone, anthraquinone, dioxazine, sulfur, azo, dibenzanthrone and / or perylene pigments, the sum of free heat shrinkage after 30 minutes of treatment at 180 ° C and from reference elongation at 27 cN / tex from the force-elongation diagram of the polyester monofilament is less than 15%.

2. Polyester monofilament according to claim 1, characterized in that the sum of free heat shrinkage after 30 minutes

Treatment at 180 ° C and the reference strain at 27 cN / tex from the force-strain diagram is less than 12%.

3. Polyester monofilament according to one of claims 1 to 2, characterized in that the titer of the monofilament is between 45 and 300 dtex.

4. Polyester monofilament according to one of claims 1 to 3, characterized in that the cross section of the monofilament

is irregular, point or axisymmetric, preferably round, oval or n-shaped, where n is greater than or equal to 3.

5. Polyester monofilament according to one of claims 1 to 4, characterized in that the monofilament contains at least one UV stabilizer, preferably in an amount of 0.0001 to 5.0 wt.%.

6. polyester monofilament according to one of claims 1 to 5, characterized in that the pigment is a perylene pigment.

7. polyester monofilament according to one of claims 1 to 6, characterized in that the monofilament is flame-retardant.

8. polyester monofilament according to claim 7, characterized in that the monofilament contains flame-retardant additives,

in particular in the form of phosphorus-containing and / or of

halogen-containing compounds.

9. polyester monofilament according to claim 7, characterized in that the monofilament is composed of phosphorus-containing polyester.

10. polyester monofilament according to one of claims 1 to 9, characterized in that the monofilament contains polyethylene terephthalate, in particular with phosphorus-containing monomers modified polyethylene terephthalate.

11. Polyester monofilament according to one of claims 1 to 10, characterized in that the monofilament contains a friction-reducing additive. 2. Polyester monofilament according to claim 11, characterized in that the friction-reducing additive one or more

Contains fatty acid amides.

13. polyester monofilament according to claim 12, characterized in that the friction-reducing additive additionally phosphite and

Mineral powder, especially calcium carbonate. A process for preparing spun-dyed polyester monofilaments according to claim 1 comprising the following measures: i) blending thermoplastic polyester with a masterbatch comprising a filament-forming polymer and at least one pigment selected from the group of phthalocyanine, metallophthalocyanine, pyrazolone,

Anthraquinone, dioxazine, sulfur, azo, dibenzanthrone and / or perylene pigments in an extruder,

ii) extruding the mixture from step i) through a

Spinneret with one or more fine bores having a diameter of 0.4 to 1, 0 mm, iii) one or more hiding the formed monofilament,

iv) relaxing the monofilament formed, and

v) optionally spooling the monofilament formed.

Use of polyester monofilaments according to one of Claims 1 to 13 for the production of textile surfaces for use in the construction sector.

16. Use according to claim 15, characterized in that the textile surfaces are used in roof structures, shading, facade cladding or textile decorations for the construction sector.