DE2808607A1 - BUILT FILAMENT YARN AND ITS MANUFACTURING AND USE - Google Patents

Description

DR.-ING. WALTER ABITZ * - ^to " ^hen · February 28, 1978

TPjTj ΊΛ TTj ^{1 1 1} TJ Tj ¹ >> T / "* VDO j I Postal address

DR. DIETER F. MORF Λ | Pq ₃ ZL ₈ 601 Ο9, 8C00 Munich 8β

DIPL.-PHYS. M. GRITSCHNEDER Ί ^^ Ι ^^^ JWU ^ 607

Telephone 98 32 22

Patent attorneys Telegrams: Chemlndus Munich

Telex: (0) 523992

ED-2565-

EGG. DU PONT DE NEMORS AND COMPANY 10th and Market Streets, Wilmington, Del. 19898, V.St.A.

Bulky Pilament Yarn "and its manufacture

and use

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S ~ 28G8607

The invention relates to a bulked nylon filament yarn, In particular, such a yarn, the adjacent sections of different degrees of bulk with improved cohesion has a process for its manufacture and its use.

Artificial filament yarns that have been intermittently bulked in the longitudinal direction of the yarn are familiar. They're puffy Various methods have been used such as false twist crimping, stuffer box crimping, edge crimping and Nozzle crimping, the yarn being subjected to the bulking process intermittently in such a way that certain Long pieces of yarn remain unbuffed. When heat is applied to bulking, such processes not only lead to education of bulging contrasts between the bulging and non-bulging zones, but also to differences in gloss and in dyeability, with the heated bulky zones can conventionally be more deeply colored due to the relaxation that occurs. It is also known to bulge or to intermittently reduce or remove the latent bulking potential of an already bulked yarn by one puffed yarn under tension intermittently on a curved, heated surface over which the yarn. running, pressing, .or by treating different types of bulked yarns intermittently with a swelling agent and then passing the yarn so treated under tension through a heating zone to create the bulk in the treated parts to release the yarn. However, if you subject yarns to intermittent debuffing before they are processed into goods the filaments in the depleted zone show little entanglement with one another and little connection, and there is a likelihood of the filaments snagging or snagging when the material is in the fabric Work is used, resulting in work difficulties and product defects. A fast, continuous one Method for intermittently reducing or removing bulkiness from the filaments

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bulky yarn and at the same time to introduce a cohesion sufficient for adequate handling would therefore be I wish you could.

A method of forming cohesion Multifilament yarn is described in US Pat. No. 3,110,151 which is a braided yarn, a so-called interlaced yarn, is generated by a multi-filament strand or a Number of strands with steered, positive tension of sufficient size to prevent the formation of ring-like loops prevent the filaments and leads through a fluid nozzle Separates filament groups from one another and then randomly resp. statistically disordered into one another.

The invention is characterized in the claims.

It has been found that an intermittently detached nylon filament yarn with improved thread cohesion can be found in having the stripped sections made by passing a pressurized, rapid stream of heated fluid so passes through parts of a bulky, thermoplastic pilament yarn, especially nylon yarn, which are present at intervals, which moves under tension, so that the heated fluid disentangles predetermined portions of the yarn and the filaments obligated in the removed sections. The product is a bulked nylon filament yarn with a repeating Pattern comprising a first section of one degree of bulk adjacent to a second section of a different degree of bulk has, wherein the portion with the lower degree of bulk has compressed parts at both ends, The densified parts are formed as knots of interwoven filaments or by a combination of knots of interwoven filaments characterized by filaments comprising the knots.

In the method according to the invention, any heated Find fluid use that is substantially inert to the yarn; preferably one works with steam.

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A particular advantage of using a high speed having heated fluids is adrin that such a fluid opens the yarn bundle, in the deconstructed sections forms intertwining knots in the sense of improving the cohesion of the yarn and all filaments in the yarn bundle appropriately treated evenly - in contrast to the known arrangements in which hot, curved surfaces or other means can be used which cause a greater heating of the surface filaments of the yarn bundle than that in the middle of the bundle of yarn located, the known devices also not in the sense of an intermittent Debuffing an already bagged yarn and the formation of interlacing knots in the debuffed sections of the Yarn work.

Made with the yarn according to the invention, tufted Loop and cut pile fabrics reflect different degrees of bulk between sections Light reflection characteristics Light with the formation of peculiar highlight effects in the goods.

In the drawings shows

1 shows a schematic illustration of a preferred embodiment of the method according to the invention and the Device. For the production of the yarn,

Fig. 2 enlarged and partly broken in elevation, the device for passing heated, pressurized Fluids through the yarn,

Fig. 3 is a side elevation, partly in section, along the line 3-5 of Fig. 2,

4 shows a schematic view of the yarn according to the invention, the adjacent sections of different bulk levels with compacted parts at the two ends of the sections shows lesser bulk,

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FIG. 3 is an enlarged view of a portion of the yarn of FIG. 4 showing the densified parts as interlaced knots, and FIG

FIG. 6 is an enlarged view of another portion of the yarn of FIG. 4 showing the densified portions as from Shows entanglement knots comprised of filament groups.

As shown in Fig. 1, a bulked nylon filament yarn is used 10 withdrawn from the pack 12 by means of two driven rollers 14 which work in tandem and to one another are slightly twisted so that the yarn runs around the two rollers in several loops to avoid slippage can. If desired, a plurality of yarns 10 can be removed from packs 12 and in front of the rollers 14 in a guide 13 bring together. The rollers 14 can, if desired, be arranged in a box in which one has heated air introduces, be heated. In this case, the yarn would be preheated when it came into contact with the rollers 14. After leaving of the rollers 14, the yarn then runs over guide rollers 18, 20, on a looping distance of approximately 180 ° about the driven wheel 22 which is used to pass water vapor through spaced portions of the yarn Is used, and after leaving the wheel '22 over guide rollers 24, 26 and through the nip of a pair driven rollers 28 and a guide 30 to get on the package 32 to be wound up. By regulating the speed of the rollers 28 relative to that of the rollers 14 is the yarn 10 during its treatment as it rotates around the wheel 22 to the desired tension with a value in the range brought from 0.01 to 1.0 g / den. By regulating the speed at which the winding on the pack 32 takes place, relative to that of the rollers 28 wird.die desired tension for winding a satisfactory Pack made.

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2 and 3 show the heat treatment wheel 22, which is used for Is mounted around its axis in the bearing 23 around its axis. The yarn 10 enters the hat 25 and is s during its 180 ° revolution held in the groove bottom by an appropriate tensile stress formed between the rollers 14 and 28 in the yarn a rotary gland socket 34- on the axis of the wheel 22 water vapor is supplied to the latter, which flows through passages 36 in the wheel 22 to the holes 38. When the wheel 22 running at the same speed as the yarn 10, the water vapor penetrates from a hole 38 during rotation of the wheel the path of the yarn 10 at approximately the same yarn location as when the yarn entered the groove 25 and when Exit from this.

The wheel 22 can be driven by the yarn at the yarn speed or separately, the latter case in general the wheel speed equals the garage speed -. can be or something below or above it. Such a differential movement can deplete the length Sections are increased * The ratios are preferably between the wheel speed and the yarn speed in the range of about 0.9-1 to 1.1-1 ratios outside this range could lead to excessive friction ".

By selectively closing passages 36 achieve different debuffing patterns.

In operation, water vapor penetrates from the holes 38 Path of the yarn 10, and the filaments are defeated by the Water vapor evenly separates, interweaves and heats to remove their tendency to bulge and remain in contact with the water vapor at this location for 180 of the wheel revolution. The resulting product is, as in Fig. 4 to 6 " shown, a bulked nylon filament yarn 10 'with a repeating pattern comprising a first section 11 with a degree of puffing adjacent to a second section

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with a different degree of bulk from this. When depicting Pig. 4- the section 13 has the lower degree of bulk, and, as can be seen more clearly in FIG. 5, the section 13 * has compressed or contracted parts 15 ·> 17 at its two ends. This compacted parts can of nodes (node-like areas) of interwoven yarns, as shown in Fig. Are formed ^ ₅ or nodes of interwoven threads 15 '' 17 '> comprising of filament groups 19, 21 and are wrapped as shown in Fig. 6.

While in long sections of lower Bauschs multiple There may be interlacing knots, there is a condensed section at the beginning and end of a section of lower bulk. or solidified part. The compacted parts at each end of the dismantled parts 13, 13 'improve the cohesion of the yarn 10.

Game cooked in a relaxed state according to the invention develop bulk in sections 11 to a greater degree than in the heat-treated, bulky sections 13 »13 *» and the degree of bulk in sections 13 »13 ' may vary between slightly below that of a fully lofted yarn and fully disentangled yarn, whatever Degree of treatment depends.

A main feature of the yarn according to the invention in woven, knitted and tufted loop pile and cut pile goods are the different light reflection values of the bulged sections opposite depleted sections. This characteristic occurs particularly with tufted loop and cut pile carpets when viewed from above under normal conditions of incidence of light. The two However, carpet structures differ greatly from one another in the way they are reflected. If at the ski " gen construction a debuched section with the. . "Arch" part When the air collapses, a bright highlight is too

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observe, as the room light is reflected more or less like a mirror. The diffuse light reflection of the bulging Looped "arches" of the surroundings emphasize this highlight their configuration of the "tangled" head ("balled-up" tip) an effective source of diffuse reflection essential straight filaments and planar cut head shape shine some of the light from the surface "to derive" and to scatter downwards in the direction of the length of the tuft. The removed tufts appear in the result of End of the tuft viewed from much darker than the bulked tuft. This phenomenon is both starting from yarn uniform dyeability as well as those with mixed dyeability and can be observed with both sheared and non-sheared cut pile. Another styling option is useful if you use yarns according to the invention in buckets of high / low loop pile construction and only die '*: cuts or shears higher loops «

It has been shown that the dyeability of the yarn in the stripped sections differs from that in the bulged sections Sections are not very different (it is generally higher), but when viewed from the side it shows the stronger gloss of the deconstructed sections the appearance of weaker dyeability = when viewed from the end of However, cut pile shows a much darker effect than before.

The process can take the form of a separate process on already bulked yarn ... or in conjunction with the bulk process according to US Pat. No. 3,271 A3 in the form of an additional step carried out before the bulking process and before winding.

Depending on the yarn temperature and tension different degrees of bulk removal can be achieved. Very high temperatures can cause the filaments to fuse

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lead and should be avoided for normal carpet purposes. When working at very high speeds it may be necessary be to preheat all of the yarn, taking only goes to a temperature that is not sufficient to remove the bulging from the bulky sections, so that the hot, blasted debulking fluid only needs to increase the temperature of the filaments above the threshold value required for Training of the debulking effect is necessary. If this debulking work is directly related to a hot bulking process afterwards, the yarn temperature at the inlet to the stage of intermittent debuffing can already be high enough, to eliminate the need for preheating.

Depending on the above factors, one can choose the Carry out preheating stage at temperatures in the range from 45 to about 210 ° C, usually at temperatures will work from 75 to 210 G. The temperature of the heated fluid jetted onto the yarn can range from about 150 to 300 ° G range, with a range of 240 to 300 ° C being preferred will. The heated fluid will normally be under a pressure of about 3.4 to 14 bar (about 50 to 200 psi), most of the time one will operate at a pressure of 4.8 to 8.6 bar (70 to 125 psi).

The tension of the yarn during heating can be in Depending on the degree to suppress the frizz recovery and the desired yarn context is essential can be varied. For example, a small amount of tension may in fact enable the formation of a steered amount provide crimp and its heat setting in this form, so that little more Curl formation results. The tensile stresses can range from 0.01 g / den to the yield point of the yarn, whereby a range of 0.01 to about 0.1 g / denier is preferred. The degree of entanglement achieved is determined by tension and fluid pressure determined, with high tensile stresses inhibiting the entanglement and high fluid pressure reinforcing it. The one in the

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RD-2565-A _A

Filaments present degree of construction at the time of interweaving also influences the efficiency of the interweaving, whereby high bulk levels inhibit the interweaving.

While looking at the lengths of the bulged and disemboweled sections can choose differently depending on the intended use and the desired styling effects a yarn to be used in a looped or cut pile fabric does not have any excessively short bulged or bulged sections exhibit. If such sections had a length that is below the pile height, the case could naturally occur that some such sections remain hidden in the document. For fine-titrated ones to be used for knitting Similar considerations apply to yarns »The maximum length is only determined by the number of times it is repeated should occur. Regular intervals are undesirable for many goods; an irregular pattern can be formed, by making the holes in the wheel straight Fig. 2 and 5 in uneven Intervals or by programming the speed of the wheel 22.

As a general guide, it can be said that the lengths of the disemboweled Sections from about 6 mm to 25 1/2 cm (about 1/4 to 10 inches), while the length of the puffy sections ranges from about 1 1/4 to 2f? 1/2 cm. (About 1/2 to 10 inches) can be enough. In most cases one should choose the length of the bulky section so that it is equal to the length of the depleted sections or larger.

In the following examples, 6 ~ 6 mylon bulked yarn was used removed with single or multiple yarn feed of packs 12, brought together by a guide and by a Device passed through essentially according to FIG. Temperature could be regulated by controlling the temperature of the air entering it. " The temperature within the Eastens is the preheat temperature.

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Bas wheel 22 corresponded to FIGS. 2 and 3, but had in the different Examples of different dimensions as follows: The bath A was with 3 outlet openings 38 at radial intervals of 120 °, with the opening centers on a diameter of 97 mm. The wheel B was with outlet openings 38 in Radial spacing of 60 provided, the centers of which lay on a circle of 97 mm diameter. The wheel C had 24 outlet openings 38 at a radial distance of 15 ° on a circle of

in order to. To choose the desired pattern in each case, were the passages 36 feeding each outlet opening can be selectively closed.

The wheel C was made with three different pattern settings operated as follows:

Sample print arrangement (X * closed,

O * not closed)

F XXXOXXXOXXXOXXXOXXXOXXXO

G OOOOOOOOOOOOXXXXXXXXXXXX

H ΟΧΧΟΧΧΧΟΧΧΧΧΣΟΧΟΧΧΧΧΧΧΧΧ

The working conditions and the lengths of the high bulk relative to the lower bulk in the yarns produced, Table I.

6-6 nylon yarn was used as the starting material in the example 1 a yarn of 136 tex (1225 den) with 68 filaments (for dyeing with cationic dye), a yarn of 136 tex with 68 filaments (for light coloring) and a yarn of 138 tex with 83 threads (for deep dyeing), each with a 4-cavity filament cross-section according to US-PS 3,75,061. In Example 2, a single yarn of 272 tex with 136 filaments (deep dyeing), Void filament cross-section as above, used. In example 3 became a single yarn of 56 tex with 92 filaments of trilobal cross section with a modification ratio (MR) of 2.3 (for regular dye)

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turns. In example 4- three yarns of 14-4-tex with 68 Filaments of trilobaletn cross-section with a modification ratio of 2.3 used (deep dyeing) = the starting material in example 5 corresponded to example 1 and that in example 6 to 10 the example 4- »

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O CD CO CO

1 2.54 2 94 0? ε 3 ι be 1 1 e I 2.54 6th 7th 8th 9 10 ro 5 276 2.36 6th 274 2.36 457 914 457 457 457 cn 10 495 45 6th 4th example 750 10 10 10 10 10 Rollers 14
Fast
speed, m / min 150 A.
3 lo
cher
open minded 45 274 5 175 210 175 175 175 Number of TJm-
loops C.
j? 1.1 / 1 2.03 A.
1 hole
open minded 7th 457 1/1 G
H C. C. C " C. Preheating
temperature, ° C 8.62 2.36 2.03 55 10 4.83 See.
E.g. see.
5 Example 5 see.
Ex. 5 see.
Ex. 5 see.
E.g. 17th Wheel 22
Art
template 260 337 2.36 B.
6 lo
cher
open minded 170 275 Slot width,
mm 0.05 1000 2.03 C.
G 0.07 750 1500 750 750 750 064 diameter of
Hole 38, mm 125 1.1 / 1 1.57 125 RPM H 7.93 1.1 / 1 900 26.5
25.9 1/1 1/1 1/1 1/1 1/1 6th
8th relationship
Ead / Garn-Ge
speed 250 6.90 5, 17 6.90 5.17 5.17 5, Water vapor pressure
(P _ü ). bar 0.035 250 1/1 280 290 240 260 280 Water vapor tem
temperature, ⁰ C 125 . 0.050 6.90 0, 038 0.08 0.050 0.050 0, Tensile stress,
Treatment zone,
g / den 4.2 100 270 125 125 125 125 125 Winding, g ¹ I :? 0.057 • 5.6
2.8 5.6
2.8 5.6
2.8 5,
2, length
High bulk, cm
jTiederbaus'ch, cm 125 2.8
1.3

CO CD OO CD CD

see Table II

The yarn of Example 6 had an irregular pattern on the distance corresponding to one wheel revolution, the repeated with each revolution as follows:

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Table II

High, low, high, low, high, low, high, low, high, low bausch bausch bausch bausch bausch bausch bausch bausch bausch

cm 16.3 2.16 4.21 2.20 6.25 2.38 10.16 2.49 2.26 2.10 ω

OO O · CO OO CO

cn I

ο -Js

CO ι

ο ο

OO

■ ID CO cn CD -J

RD-2565-A. * $ 2R08607

The yarns of all examples exhibited a "repeating" pattern of a first one-grade bulk portion adjacent to a second lower bulk bulk portion, the Lower bulk section had compacted parts at both ends. The compacted parts were common Intertwining knots with single or multiple filament loops similar to Fig. 6. However, in some cases the compacted parts only showed entanglement knots as in Pig. 5-

A cut pile fabric - 3/16 inch gg, 7 1/4 stitches / 2 1/2 cm, pile height 1.6 cm, Basis weight 1187 g / m - tufted. The visual contrast between the cut ends of the cut loops of bulky sections and treated sections was conspicuous. Light reflected by the ripples in the bulky sections gave these ends a bright appearance. Set up however, where a treated section is cut, the filaments are essentially straight so that little light is reflected towards the viewer and these ends appear very dark.

A sweater was circularly knitted with the yarn from Example 3. The low bulk sections gave a firm grip compared to the soft high bulk sections. The Niederbausch sections simulated with their glossy pattern due to the repeating pattern in adjacent courses a patterned knitted fabric. Such patterns can be created by choosing different high and low bulk patterns and different knitting conditions vary. If you use a corresponding yarn as a weft in upholstery fabric, you get an effect similar to that of thick and thin yarn.

With yarns of the other examples, loop pile and cut pile carpets were made produced with their different titers corresponding structures. All goods showed those discussed above Bulky and glossy contrasts, but with differences in degree

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the contrast and the amount of the visible high or low bulk templates.

Examples 8, 9 and 10 show the effects of water vapor temperature and / or tensile stress on the degree of debuff obtained in treated sections compared to the bulk in the untreated sections of higher bulk. The degree of bulk removal achieved in Example 8 represents approximately the minimum with which a noticeable difference in bulk and / or gloss is obtained in cut or loop pile fabric. Example 10 shows roughly the maximum amount of debuffing, while Example 9 lies between the two extremes. While the thread length difference of about 17 % in Example 8 is the minimum value required to achieve a good degree of bulk and / or gloss contrast in any pile fabric, it is preferred to work with a thread length difference of at least 20 %.

The yarn of Example 8 can be described by the following pattern description characterize:

1. 5 »Ί cm long high bulk. The three starting yarns are separate and parallel.

2. Tight interweaving knot approximately 0.3 cm in length. The node usually contains single and / or Multipelfilament- "Uraschlingungen ^t" .The filaments in the node appear to have retained Fadenkräuselung-something. The luster of the knot is not markedly different from that of the high bulk section.

3 x 1.9 cm sections of intertwined, crimped filaments, which, when viewed from the side, has essentially the same sheen, but noticeably less bulk than that High bulk section shows. The low bulk section has a single yarn appearance, which is an indication of a high

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Degree of intermingling of the three starting yarns is * 4-. Dense intertwining knot that is a mirror image from above 2. represents. .

If one or more of the three starting yarns can be dyed differently, the finished yarns show up Processing and dyeing distinct, parallel sections of separate colors in the areas of higher bulk and mixed mottled tones in the areas of lesser bulk. By varying the process parameters, different Achieve degrees of mixing.

The pattern description of the yarn of Example 8 also applies to the yarn of Example 9 with the modification that the applied water vapor temperature of 260 ° C led to the occurrence of considerably more filament uncrimping, from which there was a noticeable gloss contrast between the treated section and the untreated section «.

The pattern description of the yarn of Example 10 is the same that of Example 9, with the modification that the steam temperature of 280 ° C. causes even more filament de-curling caused a substantial gloss contrast between the treated section and the untreated section Section resulted in ..

To determine the actual percentage change in thread length in the treated sections in relation to the untreated sections served a test, -with the 1.2? cm long pieces of boiled, treated and untreated Filaments in a tension-free state with one device (Type Bell and Howell Microfiche Unit) photographed whose optical system is 18 times magnification of the filaments. Each filament was then measured with a card measuring instrument (type Keuffel and Esser Ur. 62 O3OO) measured linearly. In doing so, the treated Sections of each test piece randomly 50 filaments

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and from the untreated sections of each specimen at random 20 filaments chosen. The following table lists the lengths.

Table III

Test item high-rise bodice reduction,

Section, cm section, cm%

Example 8 30.4-3 25.22 17.1

Example 9 31.52 23.50 25.5 Example 10 30.63 23.22 24.2

An examination of sample cards ("mirror boards") and Schiingen-style carpets clearly showed the differences in gloss between the test items. Notably, the incremental change in thread "straightness" contributed Example 10 due to the removal of micro-curling leads to a drastic increase in the degree of gloss contrast in the Comparison with Example 9, in which there is a certain amount of micro-curling in the filaments.

The interweaving in the stripped sections of the yarn of Example 10 was carried out according to the hook drop method TTS-PS 2,985,995 using a hook weighing 100 g, with an average cohesion t-factor ("Coherency Factor") of 107. This degree of cohesion is quite adequate to avoid snagging or snagging etc. during all normal processing.

End of description

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Claims (1)

Claims 1. Bulky, thermoplastic filament yarn with a repeating blob that has a first section having a bulk of one degree adjacent to a second portion of different bulk, thereby characterized in that the section with the lower bulk is intertwined with knots at both ends Has threads. 2. Yarn according to claim 1, characterized in that the knots of interwoven threads of a group of filaments are included. 3. Method of treating a bulky, thermoplastic Filament yarn moving from a source to a take-up, characterized in that one has the Puffed yarn is tensioned between the source and the winder and is spaced through Parts of the tensioned yarn are passed through a heated fluid under pressure. The method according to claim 3i, characterized in that the yarn prior to passing the heated fluid through the yarn to a temperature of about 75 to 210 ° C preheated «, - Λ - Q, 9 835/0900 RD-2565-A 2 VR; - ¹ MlV 5- The method according to claim 3i, characterized in that the fluid is heated to a temperature of about 150-300 ° G. 6. The method according to claim 5? characterized in that one the heated fluid at a pressure of about 3.4 to 13.8 bar (approximately 50 to 200 pounds / square inch) begins. 7- Bulky nylon filament yarn with a repeating Pattern with alternating sections of thicker and lesser bulk, characterized in that between each Section of a knot of intertwined threads. 8. Yarn according to claim 7, characterized in that the knots of interwoven threads are formed by a group of filaments are included. 9- yarn according to claim 7, characterized in that the The length of the lower bulk portions ranges from 0.6 to about 25.4 cm (1/4 to about 10 inches), the Length of the sections of thicker bulk ranges from 1.3 to about 25.4 cm (1/2 to about 10 inches) and the length of the sections of greater bulk is the same as that of the sections of lesser bulk or greater. 10. A method of treating bulk nylon filament yarn moving from a source to a take-up; characterized in that the bulked yarn is placed under tension between the source and the winding sets and passes heated fluid under pressure through the tensioned yarn at predetermined points in the yarn. 11. The method according to claim 10, characterized in that one leads the tensioned yarn around a wheel with a Means for passing the heated fluid under pressure through the yarn at predetermined yarn locations the rotation of which is provided around the wheel, with QRGfNAL INSPECTED 8098 3 5/0900 Εΰ-2565-Α 3 7R08607 a speed ratio between wheel and yarn operates in the range of 0.9: 1 to 1.1: 1. 12. The method according to claim 10, characterized in that that as a heated fluid under pressure V / a ss he vapor from a temperature of about 150 to 300 C at a Pressure of about 3.4 to 13.8 bar begins. 13 · The method according to claim 12, characterized in that at a temperature in the range from 240 to 300 ° C and a pressure in the range of 5.2 to 8.6 bar (75 to 125 pounds / square inch). 14. The method according to claim 10, characterized in that that a force in the range of about 0.01 to 0.1 g / denier is used to tension the yarn. 15. The method according to claim 10, characterized in that that the yarn is preheated to a temperature of about 45 to 210 ° C before the heated fluid is passed through. 16. Use of the yarn according to claim 1 as pile yarn for loop pile and cut pile tufted goods. / 0900