JPH036265B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to synthetic bulk continuous filaments (BCFs) that are dyed or can be dyed in different colors, resulting in a novel heather yarn appearance. The appearance of mixed-color yarns includes an emphasis on small, distinct dots of individual colors, or color points, which are irregularly distributed along and throughout the matrix of contrasting colors. I'm here. The present invention not only includes dyeable or dyed yarns, but also articles made therefrom, as well as articles made from substantially filament-free first yarns.
Relating to a method for producing these yarns by combining a BCF yarn component with a second BCF yarn component in which there are periodically areas of high filament entanglement that are retained even within the combined yarns. .

Mixed color BCF can be differentially dyed or made from dyed BCF component yarns in a variety of ways to provide a variety of mixed color yarn appearances. This appearance ranges from very thick lines with irregular individual tones and relatively long lines (obtained with relatively little filament entanglement between the component yarns) to very delicate color mixtures. (those in which the filaments are highly intertwined among the component yarns).

U.S. Patent No. 4,059,873 (Nelson)
describes various known methods for making BCF mixed color yarns, as well as methods for producing BCF mixed color yarns with various degrees of color mixing. The latter mixed color yarn contains not only the colors of the component yarns but also ``various combinations'' of such colors, and has different zones irregularly distributed along the mixed color yarn; Pile fiber fabrics made from standard yarns consist of individual "color spots" which are the colors of the component yarns, and different colors resulting from the various blends of component yarns that make up the mixed yarns. In such mixed-color yarns, the filaments of the component yarns intermingle between the yarns to create areas where such filaments are intermixed between the yarns at irregular lengths; Such areas are randomly distributed between yarns of irregular length and areas where no yarn is blended. In the blending zone, the component yarns are held together to create a mixed color yarn. Such yarns can be made into pile rugs that are virtually free of discernible stripes or mottling, in which the component yarns are visible but have a matted appearance. . To obtain such results, all component yarns must be substantially free of filament entanglement when fed to the blending step. The mixed color effect of thick lines with large areas of individual colors can be obtained by a similar process, but the entanglement of the filaments of the component yarns is normal as seen in commercially available BCF yarns, and when the yarns are combined, The intermingling of filaments between the filament and the yarn must be limited.

BCF blending yarns are so common in the tufted rug market that carpet designers continue to search for distinct new blending effects. However, the production of acceptable novel yarns remains very difficult. This is because the component threads are sufficiently irregular,
Moreover, the components must be combined in such a way that a well-defined and desirable blended yarn is obtained, and a yarn that does not leave unacceptable patterns, such as stripes or mottling, on the finished product.

The product of the present invention comprises a relatively loose matrix of first yarns of crimped filament and at least one color point that is dyeable or dyed in a different color than the first yarn. a second yarn as a giving yarn, the first yarn and a portion of at least one of the second yarns are doubled by irregularly mixing; The yarn contains relatively short, tight knot portions due to a high degree of filament entanglement and bulky portions where the filament entanglement is relatively low, alternating periodically along the length of the yarn; The second yarn has substantially no intermixing with the filaments of the first yarn at the knot portions, and the bulky portions of the second yarn are irregularly mixed with the filaments of the first yarn. It is a doubled synthetic yarn capable of being mixedly dyed or mixedly dyed, characterized by being mixed.

Another distinct effect on appearance and style is obtained when the filaments of either the first or second yarn in the doubling are longer than the filaments of the other component yarns. For example, if the longer filament is the second component yarn providing the color point, the extra length is consumed by crimps and loops that are irregularly distributed along the surface of the combined yarn. Ru. These loops can be either crunodal or arched depending on the length difference and mixing conditions. If the longer filament is the first component or matrix yarn, then U.S. Pat.
As stated in No. 4222223 (Nelson),
The excess length is accumulated in the surface loops of the filament. Particularly well-defined and useful products are obtained when the filaments of one yarn are within the range of 15-45%, preferably 20-30% longer than the filaments of the other yarn.

The present invention also provides jet mixing of a plurality of substantially untwisted bulky continuous filament yarns that can be dyed in different colors or that are dyed in different colors adjacent to each other under progressive tension. feeding a combining zone, intermixing the filaments of the plurality of yarns between yarns within the zone, and combining the filaments from the zone at a rate of 4 to 30% slower than the rate at which the yarns are fed to the zone. In the method for producing a compound yarn that can be dyed in a mixed color or that has been dyed in a mixed color by pulling out yarns from a matrix, the plurality of yarns are
comprising a first thread of the book and a second thread dyeable or dyed in a different color than the first thread for providing at least one color spot; is substantially free of filament entanglement, and the second thread has a relatively short, tight knot section with a high degree of filament entanglement and a bulky section with relatively low filament entanglement. be included periodically along the longitudinal direction of the yarn, and if the feeding speeds of the first yarn and the second yarn are unequal, the excess feeding rate of the faster yarn is up to 45% greater than the overfeed rate of the slower yarn, such that there is substantially no intermingling with the filaments of the first yarn at the nodes of the second yarn; The present invention also provides an improved method characterized by obtaining a doubled yarn having a structure in which the bulky portion of the second yarn is irregularly mixed with the filaments of the first yarn.

If the feed rates of the first and second yarns are not equal, the overfeed rate of the faster of the two yarns can be up to 45% higher than the slower yarn. In order to obtain the desired intermingling of filaments between the yarns in the method of the invention, the combined yarns must be withdrawn from the mixing zone at a rate of 4 to 30% slower than the feeding rate of the yarn to the zone. Must be. However, as long as the slower (or in some cases the slowest) of the yarn components is over-supplied within the range of 4-30%, the other components are
In particular, it is possible to overfeed by 15-45%, preferably 20-30% higher. Of course, if there is such a difference in oversupply, yarns with different lengths of component yarns will be obtained.

As used herein, the overfeed rate in the mixing zone is calculated as the speed of the feed roll minus the speed of the take-off roll, ie, the surface speed divided by the speed of the take-off roll multiplied by 100.
The difference in oversupply rate is calculated by subtracting the lower oversupply rate from the higher oversupply rate.

The second component of the invention, the periodic filament entanglement required in the color point yarns, provides the novel and distinct mixed color appearance of the invention, while at the same time providing suitable entangling properties to the plied yarns. occurs, and the colored textile products made therefrom lack directionality. Periodic entanglements (entanglements are commonly referred to as interlaces in compacted non-bulk yarns) and methods for making them are described in U.S. Pat. No. 3,110,151 to Bunting and Nelson, column 9, line 57. It is stated in column 10, line 38. Preferably, the tension applied to the bulked unentangled yarn during the cyclic entangling process is less than 0.1 gpd. When combining entanglement and mixing as shown in Figure 1,
The tension exerted on the yarn during periodic entanglement is primarily a result of the pulling force of the second jet device, which is due to the forward force created by the gate blocking the entrance to the yarn passage.

BCF yarns made bulky by jets usually have some degree of entanglement due to intermingling of filaments, but this intermingling is usually only a part of the filaments at any position along the yarn. , not across all filaments at a given location. Therefore, 2 with different staining properties
Even when more than one thread is processed without deentanglement as per Nelson U.S. Pat. The threads of the section appear with individual colors (thick color mixture of lines). By tensioning the component yarns to remove entanglement before jet processing, the filaments can be opened up and blended more, resulting in fewer areas of unified color and more blended areas. .
For example, piling together yellow and blue yarns results in some yellow and blue areas, respectively, but blended areas exhibiting various shades of green. US Patent No.
No. 4,059,873, the individual colored dots or "flash" sections are described as having an average length of 3.9 to 16.5 cm.

In making the yarns of the present invention, the yarns imparting the color point are first tensioned to remove entanglement and then individually interlaced to approximately 0.5 to 4.0 inches (1.3 to 10.2 cm) center to center, preferably produces intertwined knots that repeat at intervals of 0.5 to 2.5 inches (1.3 to 6.4 cm) and are clustered together as a whole. At a given yarn speed, the knot frequency can be controlled by the fluid pressure that supplies the entangling jet; increasing the pressure increases the knot frequency and decreases the distance between knots. do. Knot spacing (overall average distance determined by pull-off test)
is greater than 2.5 inches (6.4 cm), excessive intermixing between the matrix thread and the color point providing thread will occur, causing a given color to persist too long along the thread, e.g. Streaks and directionality in pile fiber fabrics occur. When the average knot distance is spaced less than about 25 inches (6.5 cm), the color points become clearer and sharper in the fabric as the distance decreases.
No intermixing occurs at these nodes since the filament is not allowed to open during subsequent jet processing. However, between the knots, there is some degree of interaction between the filaments of the first unentangled matrix yarn, sufficient to provide mechanical entanglement between the yarns, but not enough to blend the colors much more thoroughly. There is a short area open enough for mixing. During jet processing, the matrix yarn is separated,
Entirely intertwined around the toning threads, giving the appearance of pseudo-twisted threads in some cases around each, and in some cases no actual twist to about 1 cm or less. It can give the appearance of

Therefore, in the yarn of the invention consisting of a yarn giving a blue color point and a yellow matrix, the blue color appears most clearly, and the yellow is distributed along and around the blue yarn, in short and less length zones. It appears as green.

The differences between the yarn of the present invention and the yarn of U.S. Pat. No. 4,059,873 are most clearly seen when it is tufted into a loop pile rug. The blended yarn of the patent exhibits more areas of intermixed colors than individual colors, and individual colors are more persistent in one color along the length of the yarn than in adjacent loops. carried away, so these carpets have more areas of loops with similar colors. On the other hand, the dichromatic yarn of the present invention allows one color or both colors to appear above each loop in a loop pile carpet, but with fewer areas of mixed color. The sustained length of a color along the length of the yarn is less than the length of yarn that constitutes each pile loop;
The color therefore appears differently in each adjacent loop. Furthermore, the diameter of the thread with color points varies depending on the loop, and if a knot occurs at the top of the loop, it is localized and appears as an intense color in that area. The same applies to threads with three or more colors.

The present invention provides wide flexibility in the form of mixed color BCF yarns by novelly combining fluid jet yarn processing methods. New effects can be obtained by combining and mixing at least one type of thread component. Therein is combined a method of periodically intermixing at least one component across the entire yarn bundle and then substantially disentangling the filaments therefrom. In plied yarn products, the periodically entangled yarns tend to maintain their integrity and take a somewhat undulating path in and along the less entangled filaments of the matrix yarn. To achieve this result, the BCF matrix yarn must be substantially free of filament entanglement. This can be done either by bulking the bulky yarn by a method that causes almost no entanglement, such as high-temperature gear crimping, or by bulking the bulky yarn, such as a yarn that has been bulkified by a high-temperature fluid jet. U.S. Patent No. 4059873
No. 1, column 4, lines 34-46 and 6
This can be accomplished by removing filament entanglement by drawing the yarn through a series of parallel snubbing pins in the weaving path under tension as described in columns 21-35.

The second thread, which becomes the toning thread, must be treated separately and impinged laterally, preferably with a jet having a single impinging fluid stream in the thread path, to introduce the desired level of periodic entanglement. Must be. The same type of jet can be used in subsequent steps to combine the ingredients. Untangle,
The periodic intertwining step can be carried out as a separate step, with the yarn being wound during the step, or it can be carried out as a combined continuous process, as shown in FIG. 1, for example.

Ordinary BCF carpet yarn can be used as the component supply yarn. The denier of each component yarn is 500 to approx.
The use of a combination of feed threads such as 1250 cationic, light acidic and deep acid dyeing polyamides, especially 66-nylon, is particularly suitable for styling and use properties.

FIG. 1 shows a preferred combination method of the present invention.
Figure 1 shows three BCF thread package cages 10, 1.
2, 14 are shown fixed in fixed positions on a spool shaft (not shown) from which three polyamide feed threads 16, 18, 20 are drawn, respectively.

The dyeing properties of these three types of threads are light acid dyeing, deep acid dyeing, and cation dyeing, respectively. On their way, these threads pass through guides 22, 24, 26 and past a driving snubbing roll 28 and an associated separating roll 30, about which they are wrapped in juxtaposition a sufficient number of times to prevent slippage. The threads then pass through a water applicator 32, where the threads are continuously watered with water, which then facilitates the intertwining operation in a known manner. Water can be added at various locations and by various methods prior to jet treatment. That is, the position of the addition in front of the jet is not very important. The juxtaposed yarns then pass through a snapping device 34. This device consists of a series of parallel cylindrical snapping pins over and under which threads pass alternately, applying frictional tension to the threads, spreading out the filaments of each thread, and straightening the filaments.
Makes it easier to untangle. The yarn then passes through a driven feed roll 36 and its separation roll 38. Rolls 36, 38 have a slightly faster surface speed than snunting rolls 28, 30, which put more tension on the yarn to straighten and detangle it, but permanently reduce filament crimp and have a negative effect on bulky yarns. is not large enough to cause stretching of the filament to give. After being wrapped around the rolls 36, 38 several times to prevent slippage, the threads are separated from each other and the first thread 16 passes directly through the entrance gate 46.
It is threaded from above through a fluid jet entangling device 44, while the second yarn 18, 20, which is to be the color spot, is threaded through another thread path, assisted by a separation pin 40, into a fluid jet entangling device 42. The jet assembly 42 imparts the desired periodic entanglement of the second yarn to constitute the color points of the dyed product. Yarns 18 and 20 are then joined with yarn 16 in adjacent relation at gate 46 and enter jet assembly 44 together. The yarn passes through the jet assembly 44 under conditions of overfeed and entangles into the mixed color dyeable yarn with interlaced color spots of the present invention. Yarn 48 is threaded out of the fluid stream exiting jet assembly 44 at an approximately 90 DEG angle by Coner rolls 50, 52 in the conventional manner. To provide overfeed, the surface speed of rolls 50, 52 is reduced relative to the speed of rolls 36, 38 by an amount necessary to provide the desired overfeed to the yarn passing through jet assembly 44. Next Connor Roll 50, 52
The thread 48 is advanced toward a winding device (not shown) which winds the thread into a package 54 of mixed color threads.

Entangling jet assembly 42 and blending jet assembly 44 each have a single cylindrical thread passageway and a single fluid passageway impinging perpendicularly to the thread passageway in the assembly;
This is described, for example, in US Pat. No. 4,059,873. The entrance to the yarn passage is restricted by a gate 46 (e.g. only 10-60% of the hole), which reduces the twisting action of the jet and allows the mixing fluid to pass primarily through the opposite end of the assembly and into the yarn passage. It is designed to control the path of the thread as it exits the thread and through the thread passage.

FIG. 2 shows a partial view of the entangling jet 42 and mixing jet 44 of FIG. 1 surrounded by a soundproof container 56. As in FIG. 1, the separation pin 40 threads the color point component yarns 18, 20 through the entangling jet assembly 42 before being recombined with the matrix component yarns 16 at the entrance to the mixing jet assembly 44. I will guide you to.

As used herein, the term "bulk" refers to permanently crimped filament yarns;
That is, a yarn that retains its crimp even after the filament is removed from the yarn.

The first and second yarns of the invention can be colored differently at any stage of processing. For example, it is possible to color the yarns before or after the yarns are combined or even after they are made into textile products, such as furniture fabrics or carpets. Yarns "diyable or dyed in different colors" are most often cited because of their common use and availability, and are preferred, but yarns colored by methods other than dyeing, e.g. Threads are also encompassed by the invention and can provide similar results.

Generally, throughout the present invention, "dyeable" or "dyed" yarns can be used interchangeably;
This does not substantially affect the results of the present invention.

The first and second yarn components of the plied yarns of the present invention may each be comprised of a single yarn or a multiplicity of fine denier yarns, and may be twisted if they otherwise meet the requirements of the present invention. You can make a thick denier thread by plucking it without having to do it. Two or more of the first matrix yarn and the second yarn providing color points can be used. Particularly interesting carpets are created using two and three mixed yarns.

Test method The degree of entanglement, that is, the degree of entanglement of the filaments of yarn, is determined by attaching a weight (not greater than 100 g) that is 0.20 times the denier of the yarn, and applying tension to the yarn in a vertical position. It was determined by hanging the sample. inserting into the yarn bundle a hook having a total weight in grams equal to the average denier of each filament of the yarn, but not greater than 10 g;
The hook is lowered at a speed of 1-2 cm/sec until the weight of the hook is supported by the thread. The distance that the hook descends into the thread until the weight is supported is a value that characterizes the degree of entanglement of the filaments in the thread. The result is expressed as the "degree of confounding", which is the distance in centimeters divided by 100. Since the filament mix is irregular, a sufficiently large number of samples must be tested to determine a representative average value for all yarns.

The lateral pull test directly measures the lateral entanglement properties of the yarn bundle. Two hooks are placed at randomly selected points approximately in the center of the yarn bundle, separating it into two groups of filaments. Using a tensile tester capable of measuring separation resistance, such as an Instron tester, the hook is moved at a 90° angle to the yarn axis at 5 inches/min (12.7 cm/minute).
(min). Pull the thread away with the hook until a force of 1 pound (454 g) is applied, at which point the machine is stopped,
Measure and report the distance between the two hooks. measure
Repeat 10 times and take the average value as the separation value. The yarn length tested was at least 4 to 6 inches (10 to 15
cm) and randomly selected from the yarn package cage.

The lateral pull-off test is used to determine the intertwining spacing of the component yarn knots that create the color spots, either before or after making the compounded yarns of the present invention. After piling, a sample of the component to be tested after dyeing is carefully withdrawn from the bundle of threads so that the component can be easily identified. Tools such as illuminated magnifying glasses, thread picks, and tweezers can be used to facilitate loosening the filaments that give the color spots from the sample. It may take several attempts to obtain a satisfactory sample. Perform enough tests to obtain an average value for 5 out of 10 samples. The average of the five values is then used to determine the overall average separation distance for the yarns tested.

Example 1 In the present invention, a three-component mixed color yarn of the present invention is exemplified, which is made of two yarns of the same denier giving a color point and a matrix yarn of a larger denier. The three component yarns initially obtained were all commercially available BCF yarns of 66-nylon, and the U.S. Pat.
The bulk was made by the high temperature fluid jet screen bulk making method described in No. 3781949. The threads that give the two color points each have a denier of 760,
Each filament contains 40 filaments of substantially equal denier. One was a cationic dyeable yarn (DuPont Model 854) and the other was a light acidic dyeable yarn with few amine end groups. The matrix yarn component has a denier of 1245 and includes 80 amine-end rich, acid dyeable yarns each having a denier of about 15 and 3 antistatic filaments, for a total of about 20 denier. (DuPont Model 857). As manufactured, each of the three components contains irregular amounts of fine entanglement due to the bulking process, which is sufficient for industrial handling and processing, with a degree of entanglement of approximately 25 or above. This yarn is treated with the continuous treatment method of the present invention as shown in FIGS. 1 and 2,
This initial entanglement is removed, knot entanglements are inserted individually into the yarn giving the individual color points, which are then knotted. The surface speed of the supply roll is
The speed of the conner roll is 1030 ypm (944 m/min) to provide a 4.0% overfeed at the mixing jet assembly 44. The yarn is tensioned at 1.2 g/denim between the snap roll and the supply roll and four parallel snub pins are used to facilitate detangling from the filament.
Each jet for intertwining threads to give a color point
150／9psig／scfm（10.54Kg／ ^cm2 ／／0.255cu.m.／
minutes) of air to the mixing jet.
150/31psig/scfm (10.54Kg/cm ² //0.878cu.
m./min). Water is supplied to the line at a rate of 1.2 gallons/hour (4.55/hour). A yarn product that can be dyed in mixed colors is rolled up with a tension of 170g.

Each intertwining jet device has a diameter of 0.086 inch (0.218 cm) for the two color dot threads;
Consists of a 0.75 inch (1.905 cm) long cylindrical thread channel. The two passages are juxtaposed and parallel to each other within a common metal housing. Each thread passage has a diameter of 0.062 inches (0.157
cm) are vertically intersected by cylindrical fluid passages. The center line of the fluid passage is from the inlet end of the thread passage.
0.250 inch (0.635 cm) from the exit end
It intersects the thread path at 0.500 inches (1.27 cm). The centerlines of the two passages intersect within 0.001 inch (0.0254 mm) of each other. Each thread enters its respective thread passageway over the smoothly rounded surface of the straight edged metal gate. This gate blocks 17% of the entrance to the yarn passage and is patented in U.S. Pat.
It is of the type shown in Figure 2 of No. 4059873. The edge of the gate partially blocking the inlet is perpendicular to the axis of the fluid passageway and covers a portion of the passageway on the same side as the fluid enters the thread passageway.

The blending jet device for combining the matrix yarn and the color spot yarn has a cylindrical yarn passageway 0.159 inch (0.404 cm) in diameter and 0.75 inch (1.905 cm) long. The thread passageway intersects perpendicularly with a 0.125 inch (0.318 cm) diameter cylindrical fluid passageway, the centerline of the fluid passageway being 0.250 inch (0.635 cm) from the thread entry end of the thread passageway. The centerline of the fluid path is offset 0.004 inch (0.101 mm) from the centerline of the thread path so that the two do not completely intersect. The yarn gate described above blocks 55% of the entrance to the yarn passage. In this case, the edge of the gate through which the thread passes is parallel to the axis of the fluid passage, and the offset of the center line of the fluid passage is towards the open part of the passage above the gate.

Yarns that provide two color points have a large number of knots (short, relatively tight areas where the filaments are highly intertwined) along the length of each yarn, and bulky areas (where the filaments are kept at a relatively low temperature). They were located periodically separated by intertwined open areas. Knot spacing is 0.90 for cation dyeable and light acid dyeable yarns in the pull test.
Gives values of inches (2.29cm) and 0.94 inches (2.39cm). Before entering the mixing zone and after detangling, the degree of entanglement of the matrix yarns is 5.
smaller.

In a plied yarn, the area of the node of the yarn that provides the two color points is substantially free of intermixing of the filaments with the matrix yarn, while the bulky open area has some intermingling with the filaments of the matrix yarn. The filaments intermingle irregularly, providing sufficient entanglement between the yarns, but generally not enough to fully show the color combination in the mixed-color dyed doubling yarn.

This doubled yarn has a gauge of 1/10 inch (0.254 cm) and a pile height of 3/16 inch (0.48 cm).
Carpet weight 24 oz/sq yd (828 g/m ² )
and tufted into a conventional polypropylene spunbond carpet backing in a uniform loop configuration. This carpet fabric was dish-dyed in the conventional manner using dye mixtures which gave deep brown, pale yellow and orange colors to the cationic, light acid and dark acid dye component yarns. The loops of the carpet pile exhibit individual color points consisting of irregularly distributed individual colors with little intermixing of the three colors. Very little color or color effects are carried away from one loop to the next. There were no unacceptable streaks or orientations in the dyed carpet.

The rug of this example was subjected to an abrasion test of 40,000 steps (steps) in an entryway, along with a control rug made using mixed color yarn made by the method described in US Pat. No. 4,059,873. After testing, the carpet samples were rated by a judging panel on a scale of 1-5. 5
is the best (e.g. the same as the original). The results shown in the table below show that the test carpet of the present invention is superior in all evaluation criteria.

Sample test Sample control Tissue retention 3.5 2.7 Matting 4.0 2.7 Staining 4.0 2.3 Fuzzing 4.5 3.1 Pilling 5.0 4.7 Example 2 This example uses yarns that provide two color points (cationic and light acidic). The 66-nylon BCF ternary yarn of the present invention includes one matrix yarn (dyable) and one matrix yarn (dark acid dyeable), all three of which are bulked in a hot fluid jet to improve the denim and filament properties of the yarn. The numbers are the same. That is, 760 denier and 60 filament (11 dpf). This filament has a trilobal cross section, and the deformation ratio is
2.3, contains titanium dioxide pigment and has a semi-matte gloss.

The equipment and process conditions were substantially the same as in Example 1, except that the speed of the feed roll was 612 ypm (560 m/min).
min), detangling tension is 1.05 gpd, water addition is 1.0 gal/hr (3.78/hr), pick-up roll speed is 502 ypm (459 m/min), overfeed 22%,
The winding tension was 150g. The mixing jet for combining the matrix yarn and the color point yarn has a thread passageway with a diameter of 0.204 inch (0.518 cm) and a length of 1.0 inch (2.54 cm). The thread passage
0.195" (0.495cm) x 0.107" (0.272cm)
intersects the rectangular fluid passageway at the center and its longitudinal dimension is parallel to the axis of the thread passageway. Although this jet uses a larger amount of air than that of Example 1, the desired degree of entanglement is easily and uniformly obtained. The gate is constructed to block 59% of the entrance to the thread passage. When entering the mixing zone, the threads that give the color points have periodic entanglements;
Pull-off values are 1.35 inches (3.4 cm) and 1.55 inches (3.94 cm) for cationic and light acid dyed yarns, respectively. At this point, the degree of entanglement of the matrix threads is less than 6. When the color-pointing yarns were carefully removed from the plied yarns, the pull-off values for the latter yarns were 1.32 inches (3.35 cm) and 1.28 inches (3.25 cm), respectively.

The doubled yarns are directly tufted into a 18 oz/square yard (660 g/m ² ), 3/16 inch (0.47 cm) pile height, looped carpet. This carpet was dyed under normal conditions in a dye bath containing acidic and cationic dyes to form a mixed color carpet.

The yarn and carpet have substantially the same novel structure and coloring properties as the inventive yarn and carpet of Example 1.

Each made from glossy 66-nylon polymer
This example was repeated with substantially the same results using three piecewise dyeable yarns consisting of 1225 denier, 19 dpf four-lobed, four-void hollow filaments.

Example 3 In this example, one dark acid dyeable BCF color spotting yarn and one cationic dyeable yarn of substantially the same denier (1225) but with different filament numbers (64 and 80, respectively) were used. The present invention is illustrated using a doubled 66-nylon yarn made from a BCF matrix yarn.

The equipment and process conditions are substantially the same as in Example 1, except that the speed of the feed roll is 1119 ypm (1023 m/min).
minute), Connor Roll's speed is 966 ypm (883 m/min).
), the excess supply rate was 15.7%. The tension used to remove entanglements was 1.05 gpd, and the winding tension was 150
It is g.

The resulting doubled yarn has substantially the same new filament entanglement and intermixing properties as between the two component yarns of Example 1.

A pile carpet with uniform loops was made from the resulting yarn, and dyed to give the yarn a dark brown color and the matrix yarn an orange color. This carpet showed knotted dark brown color spots, the orange and brown colors hardly mixed together, and there were no apparent stripes or directionality.

For comparison purposes, a control rug was made using mixed color yarns of the same feed yarn made using the method of US Pat. No. 4,059,873. Most of the loops in this carpet had filaments of two colors mixed together, often carrying away the same color or influencing the color of neighboring loops. Because the filaments of the two component yarns are highly intermixed, the brown color hardly appears as a substantially distinct point of pure dark brown.

EXAMPLE 4 This example shows a ternary dyeable yarn of the present invention made by feeding the blending zone with a higher overfeed rate of two color spot giving yarns than the matrix yarns. All three yarns are BCF yarns made of 66-nylon carpet grade manufactured by DuPont of Wilmington, Delaware, USA. One of the yarns providing the color point is a cationic dyeable yarn (1225 denier, type 854) and the other is a deep acid dyeable yarn (1245 denier, type 857A). The matrix yarn is a light acid dyeable yarn (1225 denier, type 855).

The apparatus employed substantially the same or stepped snubbing rolls and feed rolls as shown in FIG. The yarn providing the color point is fed by a section of large diameter, giving a large overfeed rate as is known in the prior art. The feed roll speed for toning yarns is 855 ypm (782 m/min) and for matrix yarns it is 700 ypm (640 m/min).
minute). As the thread passes through the filament detangling section, a tension of 1.1 ypd is applied to the thread before passing through the mixing section. 1.5 gallons/hour (5.68
Water is added to the thread at a rate of /hour). The interlacing jet (for the yarns providing the color point) and the blending jet are operated in substantially the same manner as in Example 1. The combined yarn was pulled out at a constant speed using a conner roll operating at 627 ypm (573 m/min). This resulted in an overfeed rate of 36% for the color point yarns and 12% for the matrix yarns. Therefore, the difference in excess supply rate is 24%
It is. In this way, a doubled yarn was obtained in which the color point-providing yarn was substantially 24% longer than the filaments of the matrix yarn.

The 4000 denier yarn is mixed color dyeable.
BCF carpet yarn has a coarse composition, and the yarns that give the color spots are crimped together, creating irregular bundle-like loops on the surface of the combined yarns.

Example 5 This example essentially repeated Example 4, but
The first matrix yarn had a greater overfeed rate than the two second color point yarns. The process conditions are the same, but the tension to remove the entanglements is
1.15gpd and Connor Roll's speed is 609ypm
(557 m/min) and the excess feed rate was 15% for the color point yarn and 40% for the matrix yarn, the difference being 25%. The total denier of the doubled yarn is approximately 4000. Cross-dye in the usual way,
The resulting highly intertwined threads exhibit dark colored areas within the thread core giving an intertwined color point;
It is covered with light-colored sections that are intertwined in loops of matrix threads.

[Brief explanation of the drawing]

FIG. 1 is a schematic elevational view of the apparatus for carrying out the invention, and FIG. 2 is an enlarged view of the entangling and mixing jet apparatus housed in a soundproof container when used in FIG. It is a diagram.

Claims (1)

[Scope of Claims] 1. A relatively loose matrix-like first yarn of a crimped filament and at least one color spot that can be dyed in a different color from the first yarn or that is dyed in a different color. and a second thread as a thread giving a The second yarn includes relatively short tight knot portions due to a high degree of filament entanglement and bulky portions where the filament entanglement is relatively low, alternating and periodically along the length of the yarn; The second yarn has substantially no intermixing with the filaments of the first yarn in the knot portions, and the bulky portions of the second yarn have irregularities with the filaments of the first yarn. A doubled synthetic yarn capable of being mixedly dyed or mixedly dyed. 2. The yarn of claim 1, wherein the overall average distance between knot portions in the second yarn is within the range of 0.5 to 2.5 inches. 3. The filaments of either of the first and second yarns are 15 times smaller than the filaments of the other yarn.
A yarn according to claim 2 which is ~45% longer. 4. Claims 2 or 3 essentially consisting of two second threads and one first thread, all of the threads being dyeable or dyed in different colors. Thread mentioned. 5. A yarn according to claim 2 or 3, wherein the first yarn accounts for at least about 1/3 of the denier of the doubled yarn. 6. The thread of claim 4, wherein either the first or second thread is 66-nylon. 7. A plurality of substantially untwisted, differently dyeable or differently dyed bulky continuous filament yarns are fed into a jet mixing zone under progressive tension and adjacent to each other. ,
by intermixing the filaments of the plurality of yarns between yarns within the zone and withdrawing the doubled yarn from the zone at a rate of 4 to 30% slower than the rate at which the yarns are fed to the zone. In a method for producing a compound yarn that can be dyed with mixed colors or has been dyed with mixed colors,
The plurality of threads include a matrix-like first thread and a second thread that can be dyed in a different color than the first thread or that is dyed in a different color to provide at least one color spot. wherein the first yarn is substantially free of filament entanglement, and the second yarn is comprised of relatively short tight knots and filament entanglement due to a high degree of filament entanglement. The yarn includes relatively low and bulky portions alternately and periodically along the length of the yarn, and when the feeding speeds of the first yarn and the second yarn are not equal, The overfeed rate of the fast yarn is up to 45% higher than the overfeed rate of the slow yarn, so that at the nodes of the second yarn there is no intermingling with the filaments of the first yarn. An improved method characterized by obtaining a doubled yarn having a structure in which there is substantially no intermingling and irregular intermingling with filaments of the first yarn is formed in bulky portions of the second yarn. . 8. The method of claim 7, wherein the average distance between knot portions in the second yarn ranges from 0.5 to 2.5 inches. 9. The method according to claim 8, wherein the first yarn and the second yarn are fed at the same speed. 10. The method according to claim 8, wherein the first yarn and the second yarn have different feeding speeds. 11 The excess feeding rate of the faster yarn among the first and second yarns is 15 to 45% higher than the excess feeding rate of the slower yarn.
11. The method according to claim 10, wherein the method has a higher %. 12. The method according to claim 11, wherein the difference between the two excess supply rates is 20 to 30%. 13 Applying a tension of 0.5 to 1.5 g/denier to the multiplicity of yarns to stretch the crimp of the filaments within each of the yarns, disentangling and parallelizing the filaments, and immediately thereafter placing the yarns in a jet mixing area. Claim 7, which includes the step of supplying
8, 9 or 10.