JPH06128805A - Triphyllus crimped yarn - Google Patents

Abstract

PURPOSE:To provide triphyllus crimped yarns rich in raised feel, durability and bulkiness, suitable for cut pile carpets. CONSTITUTION:The crimped yarns are such that constituent single fibers having the following characteristics account for >=70% of the total constituent single fibers; that is: (1) the crosssectional contour is shown in the figure; (2) each projection design with wider portion near the tip and narrower portion near the bottom, and the width of the narrower portion S is 8-14mu and the ratio of the width of wider portion L to that of the narrower portion S is 1.1-2.8; (3) the ratio of the diameter D of the circumscribed circle for the three projections to the diameter d of the inscribed circle for the three recesses is 2.5-5.5; and (4) crimp extension rate r is 10-25%.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is suitable for carpets.
The present invention relates to a leaf crimped yarn, and more specifically, to a three leaf crimped yarn suitable for a cut pile carpet.

[0002]

2. Description of the Related Art Conventionally, as to bulky synthetic fibers, crimped yarns, modified cross-sectioned yarns, hollow yarns and combinations thereof have been generally known and widely practiced.

The crimped yarn has been used practically for a long time, but when the crimp elongation ratio is increased to increase the bulkiness, especially in a cut pile carpet, the single yarn constituting the pile is bent and the felt is felt. There is a problem that it becomes like and it is not possible to achieve both bulkiness and napiness.

Regarding a crimped yarn for a carpet, which has a non-circular cross-sectional shape of a single yarn, that is, a modified cross-section yarn, for example, the irregularity of the tri-lobal yarn is disclosed in Japanese Utility Model Publication No. 62-36869. A material having a crimp ratio of 3.7 or more and a crimp ratio of 4 to 9.5 is described. However, when the degree of irregularity of the modified cross-section yarn is 3.7 or more, not only the tip portion of the projection becomes thin and wear resistance and light resistance are poor, but also the bending recovery property is extremely poor and crushing, that is, sag The technique of increasing the fineness of the single yarn, which is considered as a means for recovering this sag, is used, but in this case the single yarn becomes coarse and rigid, and when used as a carpet, it has an aesthetic appearance and an elastic sensation when traversing. However, there is a problem that a high quality cut pile carpet cannot be obtained.

Hollow fibers are described, for example, in US Pat. No. 37.
No. 45061, Japanese Utility Model Application Laid-Open No. 54-82115, and Japanese Patent Application Laid-Open No. 61-83307. The drawback common to these is that the bending rigidity is poor, and particularly in a cut pile carpet, the pile tends to fall and a satisfactory product cannot be obtained.

Further, the modified hollow fiber is described in, for example, JP-A-48-42134, JP-A-59-36714 and JP-B-2-8044. When these are used for cut pile carpet, the hollow part is easily broken or crushed and falls, and the wear resistance of the tip part of the mountain part is extremely inferior and there is a problem that it tends to fibrillate when used for a long time. .

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in cut pile carpet,
An object of the present invention is to provide a three-leaf crimped yarn suitable for producing a cut pile carpet having sufficient bulkiness, napping property, and durability.

[0008]

The above object can be achieved by the present invention described below. According to the constitution of the present invention, in the three-leaf crimped yarn, among the single yarns forming the three-leaf crimped yarn, three crests whose cross-sectional shape protrudes to the outside and three crests between the crests are formed. The valley portion has a shape in which the peak portion has a width in a direction perpendicular to the center line of the peak portion, has a wide portion near the tip, has a narrow portion inside the wide portion, and has a width of the narrow portion. S (μ) is 8 to 14, the ratio L / S of the width L (μ) of the wide portion and the width S (μ) of the narrow portion is 1.1 to 2.8, and the three The degree of deformation D / d obtained by the ratio of the diameter D (μ) of the circle inscribed on the outside of the crest and the diameter d (μ) of the circle circumscribed on the inside of the three valleys is 2.5 to
A three-leaf crimped yarn is characterized in that the single yarn having a crimp extension ratio r (%) of 10 to 25 occupies at least 70% of the total number of single yarns.

The trilobal crimped yarn is preferably mainly nylon 6, and the trilobal crimped yarn has 50 to 10 parts.
It is preferable to contain 00 ppm of copper, and it is further preferable that the 3-leaf crimped yarn contains 0.03 to 0.5% of titanium oxide.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The three-leaf crimped yarn according to the present invention means a fiber formed of a thermoplastic polymer such as polyamide, polyester or polyolefin.

When the three-leaf crimped yarn is polyamide type nylon 6, the dyeability is superior, dyeing in the form of a wide carpet is possible and the productivity is good, and the napping property and abrasion resistance are excellent. preferable.

FIG. 1, FIG. 2 and FIG. 3 are cross-sectional views showing examples of a single yarn mainly constituting in the three-leaf crimped yarn of the present invention. 4 and 5 and 6 are plan views illustrating the spinneret holes used to obtain the three-leaf crimped yarn having the cross-sectional shape illustrated in FIGS. 1, 2 and 3. FIG. 7 is a schematic explanatory view of a method for measuring the crimp elongation rate of the three-leaf crimped yarn. In FIG. 1, FIG. 2 and FIG. 3, in the width of the mountain portion 1 in the direction perpendicular to the center line X, the width of the narrow portion is S (μ) and the width of the wide portion is L (μ), and three mountain portions are included. Part 1
The diameter of the circle inscribed on the outside of D is μ (μ), and the diameter of the circle circumscribed on the inside of the three valleys 2 is d (μ).

In the three-leaf crimped yarn of the present invention, S (μ) is 8 to 14 and L /
S is 1.1 to 2.8, and D / d is 2.5 to 5.
It is an essential requirement that 5 be satisfied, and by satisfying the respective requirements of S (μ) and L / S and D / d, breakage and crushing of the cut pile are remarkably reduced, and a satisfactory nap feeling can be expressed. At the same time, it is possible to realize a cut pile carpet with excellent durability that hardly fibrillates even after long-term use.

A more preferable range of S (μ) is 9 to 1.
It is 3. The more preferable range of L / S is 1.5 to
It is 2.0. The more preferable range of D / d is 3 to 5
Is. A single yarn having a cross section as illustrated in FIGS. 1 to 3 is produced by a general method through a spinneret having a specially shaped spinneret hole 3 or spinneret hole 4 or spinneret hole 5 as illustrated in FIGS. 4 to 6. It is obtained by spinning. That is, in the shape of the special shape hole, the shape 3 in which the tip of the gap bulges in a circle, the shape 4 in which the width of the gap gradually expands outward, and the shape in which the gap almost orthogonal to the gap communicates with the tip of the gap 5 and the like can be used, and the width, length, and angle of the gap can be arbitrarily changed, and a shape obtained by combining these can be appropriately used.

The trilobal crimped yarn of the present invention is essentially composed of a single yarn, and it is essential that the crimp elongation rate r (%) defined by the following formula is 10 to 25. r = (L1−L0) / L0 × 100 L0: Length under load of 2 mg / d L1: Length under load of 100 mg / d In the measurement of the crimp elongation ratio r (%), FIG.
As shown in (A), fix one of the three-leaf crimped yarns upward,
After the length L0 of the yarn is measured while the load of 2 mg / d is applied to the other, the length L1 of the yarn is measured by changing the load of 100 mg / d as shown in FIG. 7B.

In the measurement of the crimp elongation r (%), the fibers were immersed in boiling water at 98 ° C. for 10 minutes in a relaxable state, and then naturally dried at 25 ° C. in an environment of 65 RH% for 24 hours. Although it is generally measured by the above method, the fiber obtained by cutting the pile from the cut pile carpet may be measured.

By setting the crimp extension ratio r (%) within the range of 10 to 25%, the so-called ground see-through feeling in which the base of the pile can be seen through and the so-called felt feeling in which side faces of the threads are randomly crossed are avoided. The result is a high-quality cut pile carpet.

A more preferred range of the crimp elongation r (%) is 14% to 20%.

In the three-leaf crimped yarn of the present invention, the ratio of the single yarns mainly constituting the three-leaf crimped yarn of the present invention (hereinafter referred to as the single yarn ratio) is 70% or more of the total number of single yarns. As a result, it has sufficient bulkiness and nap properties,
It is possible to obtain a cut pile carpet that is resistant to fibrillation and has excellent durability even after long-term use.

The three-leaf crimped yarn of the present invention contains copper in an amount of 50 to 100.
By containing 0 ppm, the heat resistance and the light resistance are remarkably improved, and it is more preferable for a severe application such as a car mat or an entrance mat which receives ultraviolet rays and heat. Also,
It goes without saying that an antioxidant may be added if necessary.

The three-leaf crimped yarn of the present invention has a titanium oxide content of 0.
It is more preferable that the content is 03 to 0.5%, which provides a matte effect and provides a dull, dignified and glossy carpet.

The three-leaf crimped yarn of the present invention is obtained by heat-melting a polymer, spinning from a spinneret having a plurality of specially shaped holes, and air-cooling it.
It is obtained by supplying oil, subsequently stretching it to 2.5 to 4.5 times, crimping it in an overfeed state, and imparting water or entanglement as necessary. In this process, spinning, cooling, oiling, drawing, heating, crimping, entanglement, water addition and the like may be carried out individually, but a step in which some or all are continuously formed is more efficient and more preferable. .

[0023]

【Example】

Examples 1 to 3 and Comparative Examples 1 to 6 Nylon 6 chips having a sulfuric acid relative viscosity of 2.80 were heated to 270 ° C.
Was melted in the above step and spun using a die having a large number of specially shaped holes as illustrated in FIG. Spun yarn at 12 ℃, 90
After blowing RH% air to cool it and refuel it,
A roller having a surface speed of 1400 m / min and a surface temperature of 60 ° C. is drawn, followed by drawing to a heated roller having a surface speed of 5000 m / min to preheat the yarn and crimping with superheated steam. After continuously supplying it to the nozzle and crimping it in an overfeed state, entanglement processing with high-speed air passed through the nozzle to give 12 entangles / m of entanglement on average, and then winding with a tension of 110 g and 3 leaves of 1100 denier. A crimped yarn was obtained. At this time, spinnerets having different special-shaped hole sizes were sequentially replaced, and various three-leaf crimped yarns were obtained by changing the temperature of the heating roller and the temperature of superheated steam supplied to the crimping nozzle. Using the thus obtained trilobal crimped yarn, tufting with a gauge of 1/10 inch, 13 stitches / inch and a pile height of 5 mm was performed and various cuts having a basis weight of 450 g / m ² were cut. I got a pile carpet. The following table shows the results of a sensitive evaluation of this cut pile carpet. The symbols showing the evaluation points in the table are the symbols showing the preference as a cut pile carpet, and have the following meanings. ○ ・ ・ ・ ・ Particularly favorable △ ・ ・ ・ ・ Preferred × ・ ・ ・ ・ Not desirable

[0024]

[Table 1]

[0025]

EFFECTS OF THE INVENTION The three-leaf crimped yarn of the present invention has appropriate flexural rigidity and excellent abrasion resistance, and particularly in cut pile carpet, it is rich in napiness, durability and bulkiness, It has no felt feeling, is less likely to fibrillate, has no sense of see-through, and is rich in volume, making it suitable for car mats, entrance mats, floor mats such as tile carpets, playground mats, hot carpets, and general carpets. It can be preferably used.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a single yarn that mainly constitutes a three-leaf crimped yarn of the present invention.

FIG. 2 is a cross-sectional view showing an example of a single yarn that mainly constitutes the three-leaf crimped yarn of the present invention.

FIG. 3 is a cross-sectional view showing an example of a single yarn mainly constituting the three-leaf crimped yarn of the present invention.

FIG. 4 is a plan view showing an example of a spinneret hole used to obtain a three-leaf crimped yarn having a cross-sectional shape as illustrated in FIG.

5 is a plan view showing an example of a spinneret hole used to obtain a three-leaf crimped yarn having a cross-sectional shape as illustrated in FIG. 2. FIG.

FIG. 6 is a plan view showing an example of a spinneret hole used to obtain a three-leaf crimped yarn having a cross-sectional shape as exemplified in FIG.

FIG. 7 is a schematic explanatory view of a method for measuring the crimp elongation rate of a three-leaf crimped yarn. 1 Mountain part 2 Valley part 3 Clasp hole 4 Clasp hole 5 Clasp hole X Center line of mountain part S Width of narrow part L Width of wide part D Inscribed circle diameter of mountain d Outer circle diameter of valley L0 Thread length L1 thread length

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display location D01F 6/60 341 C 7199-3B 6/90 301 7199-3B D06M 11/00 7199-3B

Claims (4)

[Claims] 1. A three-leaf crimped yarn, wherein among the single yarns forming the three-leaf crimped yarn, three troughs whose cross-sectional shape protrudes to the outside and three troughs between the troughs. The width of the peak portion in the direction perpendicular to the center line of the peak portion has a wide portion in the vicinity of the tip, a narrow portion inside the wide portion, and a width S of the narrow portion. (Μ) is 8 to 14, and the ratio L / S of the width L (μ) of the wide portion and the width S (μ) of the narrow portion is 1.1 to 2.8.
And the diameter D (μ) of the circle inscribed on the outside of the three peaks and 3
The degree of deformation D / d obtained by the ratio of the diameter d (μ) of the circle circumscribing the inside of each valley is 2.5 to 5.5, and the crimp extension ratio r (%) is 10 to 25. A three-leaf crimped yarn, wherein a certain single yarn occupies at least 70% of the total number of single yarns. 2. The three-leaf crimped yarn according to claim 1, wherein the three-leaf crimped yarn is mainly nylon 6. 3. The three-leaf crimped yarn according to claim 1, wherein the three-leaf crimped yarn contains 50 to 1000 ppm of copper. 4. The three-leaf crimped yarn according to claim 1, wherein the three-leaf crimped yarn contains 0.03 to 0.5% of titanium oxide.