JP2007197868A - Method for producing crimped yarn for dust-controlling mat, and method for producing dust-controlling mat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimped yarn for a dust-controlling mat, having improved pencil point properties while using stainproof properties peculiar to a polytrimethylene terephthalate, and having excellent retentivity of beautiful surface appearance of a carpet after long-term use, and to provide the dust-controlling mat including the crimped yarn. <P>SOLUTION: The method for producing the crimped yarn for the dust-controlling mat comprises imparting organzine of 150-220 T/m to crimped yarns of spun-dyed multifilaments using the polytrimethylene terephthalate as a raw material, and subjecting the resultant yarn to heat set by 100-130°C steam. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a method for producing a crimped yarn for a dust control mat made of polytrimethylene terephthalate, and a method for producing a dust control mat. In more detail, while taking advantage of the antifouling property peculiar to polytrimethylene terephthalate, improved bulkiness, sag and pencil point properties due to difficulty of heat setting, which was a problem of polytrimethylene terephthalate, after long-term use The present invention relates to a method for producing a crimped yarn for a dust control mat that is excellent in maintaining the surface aesthetics of the carpet and a method for producing a dust control mat.

  Polytrimethylene terephthalate fibers have attracted attention because they have excellent elasticity, antifouling properties, and dyeability comparable to nylon, and have recently been developed for use in clothing and interior fields.

  When deploying polytrimethylene terephthalate fiber in the interior field, it is considered to be suitable for carpets, and since it is particularly excellent in antifouling properties, it is a dust control mat installed at the entrance of stores and offices. It is thought that it is suitable for.

  The required properties of the crimped yarn used for the dust control mat include antifouling properties, light resistance, and bulkiness, and since the pile yarn is a twisted yarn, pencil point properties are also required.

  Since the dust control mat is often used with shoes at the entrance of a store or office, it can be said that it should be excellent in antifouling properties. So far, many dust control mats using polyamides have been invented in terms of sag resistance and bulkiness, but polyamides adsorb acidic soils, so they have poor antifouling properties and are more antifouling. There was a need to replace it with a superior material.

  In addition to polyamide, polyethylene terephthalate can be cited as an antifouling carpet material, but it is not suitable for hard-use dust control mats that are repeatedly stepped on with shoes, etc. due to its lack of bulkiness and sag resistance. It was.

  Polytrimethylene terephthalate fiber is one of the reasons that have attracted attention in recent years, taking advantage of its polymer characteristics to exhibit bulkiness and sag resistance comparable to nylon and antifouling properties comparable to polyethylene terephthalate. Proposals have already been made on crimped yarns for carpets using polytrimethylene terephthalate.

  For example, as crimped yarns for carpets of polytrimethylene terephthalate, carpet crimped yarns and carpets using pile yarns having a twist of about 3.5 to 4.5 per inch have been proposed (for example, patents). Reference 1). However, the heat setting temperature of the twisted yarn is as high as 132 to 143 ° C., and the temperature used for ordinary nylon or the like has been adopted. Polytrimethylene terephthalate is weak in heat setting properties, and once set in a high temperature state, the crimps once fixed are reset and the bulkiness is lowered. This level is not problematic for household carpets, but it is unsuitable for hard-use dust control mats because of its poor bulkiness, texture and sag resistance due to its low bulkiness. There is also no teaching of means for achieving the light resistance required by the dust control mat.

  On the other hand, a technique relating to a crimped yarn using an original yarn for a carpet pile and a method for producing the carpet has already been disclosed (for example, see Patent Document 2 or 3). These also describe carpets using twisted yarns, but the temperature of the heat set important for making twisted yarns of polytrimethylene terephthalate crimped yarns is not described or increased to 120 to 160 ° C. Since it is set, it is not suitable for the dust control mat as in Patent Document 1.

That is, in the above three patent documents, there is no contrivance for the heat setting temperature of polytrimethylene terephthalate, which is the original problem, and dust control such as bulkiness, texture, sag resistance, light resistance, etc. Since the required characteristics of the mat are not taken into consideration, no satisfactory dust control mat has been obtained so far.
Japanese National Patent Publication No. 10-502139 JP 2002-339160 A JP 2002-345623 A

  The present invention has been achieved as a result of studying the solution of the problems in the prior art described above as an issue.

  Therefore, the object of the present invention is to improve the bulkiness, sagability, and pencil point property due to the difficulty of heat setting, which was a problem of polytrimethylene terephthalate, while making use of the antifouling property specific to polytrimethylene terephthalate. Another object of the present invention is to provide a method for producing a crimped yarn for a dust control mat excellent in maintaining the surface aesthetics of a carpet after long-term use, and a method for producing a dust control mat.

  The method for producing a crimped yarn for a dust control mat according to the present invention is obtained by applying 150 to 220 T / m various twists to an original multifilament crimped yarn made of polytrimethylene terephthalate, and then using steam at 100 to 130 ° C. It is characterized by heat setting.

Furthermore, the manufacturing method of the crimped yarn for dust control mats of the present invention has the following (1) to (3) as preferred modes.
(1) The crimped yarn contains carbon black or titanium oxide as a pigment. (2) The crimped elongation rate of the crimped yarn after boiling water treatment is 15 to 30%. (3) The crimped yarn The cross section of the crimped yarn is a Y-shaped cross section with a degree of deformation of 1.5 to 4.0.

  Furthermore, the method for producing a dust control mat of the present invention is characterized in that the above-described crimped yarn for dust control mat is used as a pile.

  According to the present invention, as described below, while taking advantage of the antifouling properties specific to polytrimethylene terephthalate, the bulkiness is reduced and the sagability due to the difficulty of heat setting that was a problem of polytrimethylene terephthalate, It is possible to provide a method for producing a crimped yarn for a dust control mat and a method for producing a dust control mat that have improved pencil point properties and are excellent in maintaining the surface aesthetics of a carpet after long-term use.

  The present invention is described in detail below.

  The method of the present invention is a crimp yarn for a dust control mat comprising a multifilament crimped yarn made of polytrimethylene terephthalate as a raw material, wherein (a) the multifilament crimped yarn is an original yarn; and (b) the multifilament crimped yarn. The filament crimped yarn is subjected to various twists of 150 to 220 T / m, and (c) the multifilament crimped yarn is heat-set with steam at 100 to 130 ° C. after being twisted. It is what.

  In the present invention, the dust control mat mainly refers to a shoe wiping mat installed around the entrance of a store or an office.

  The polytrimethylene terephthalate as a raw material polymer used in the method of the present invention is a polymer obtained by using terephthalic acid as the main acid component and 1,3-propanediol as the main diol component in at least 90 mol% of the constituent units. . However, other copolymer components capable of forming an ester bond may be included in a proportion of 10 mol%, more preferably 6 mol% or less. Examples of the copolymerizable compound include isophthalic acid, succinic acid, cyclohexanedicarboxylic acid, adipic acid, dimer acid, sebacic acid, dicarboxylic acids such as 5-sodiumsulfoisophthalic acid, ethylene glycol, diethylene glycol, dipropylene glycol, Although diols, such as butadiol, neopentyl glycol, cyclohexane dimethanol, polyethylene glycol, polypropylene glycol, can be mentioned, it is not limited to this. Polytrimethylene terephthalate has better antifouling properties than commonly used nylon.

  The polytrimethylene terephthalate used in the present invention preferably has an intrinsic viscosity in the range of 0.5 to 2.0. When the intrinsic viscosity is less than 0.5, fineness unevenness and abrasion resistance during spinning are inferior, and fluff tends to occur in post-processing, and when it exceeds 2.0, the melt viscosity becomes too high. It becomes difficult to perform stable spinning.

  In the method of the present invention, the original multifilament crimped yarn needs to be a pigment-containing original yarn. Since the dust control mat is used at the entrance of a store or office, light resistance is required. In addition, it is essential that the yarn is an original yarn from the viewpoint of repeated washing. The average particle diameter of the pigment particles used is preferably in the range of 0.01 to 2 μm, particularly 0.2 to 1.3 μm. Particles of less than 0.01 μm are difficult to obtain practically, and if it exceeds 2 μm, filter clogging during spinning and fluffing during yarn production may occur, resulting in poor operability. The content of the pigment is preferably 0.1 to 10% by weight, particularly preferably about 0.2 to 8% by weight. Examples of the pigment used include bengara, phthalocyanine-based color pigment, titanium yellow, and the like, and carbon black and titanium oxide are preferable. When used in a dust control mat, it is necessary to select a color that is less noticeable to stains. Therefore, carbon black, which is a black pigment that hardly stains, and titanium oxide used as a matting agent are preferable pigments. The titanium oxide used may be anatase type or rutile type.

  In the method of the present invention, known methods such as a known ring twisting machine and a double twister can be used as a method for twisting the original multifilament crimped yarn. As the number of twists, various twists of 150 to 220 T / m are required. If it is less than 150 T / m, the pencil point at the tip of the pile is poor and the tip of the pile is unwound, so that it cannot withstand long-term use in hard use such as a dust control mat. On the other hand, if it exceeds 220 T / m, although there is a pencil point property, the twist is strong and the pile becomes thin, so that it becomes a dust control mat with poor bulkiness and poor sag resistance.

  In the method of the present invention, the original multifilament crimped yarn made of polytrimethylene terephthalate as a raw material needs to be heat-set with steam during twisting, and the heat-setting temperature should be set to 100 to 130 ° C. is required. Polytrimethylene terephthalate is characterized by its weak heat setting property in terms of molecular structure. The relationship between the crimp rate and temperature is shown in FIG. The measurement was performed using a TYT measuring machine manufactured by Lowson-Hemphill in FIG. It detects with the sensor of ZONE1.2 so that the tension set with the initial load (0.9 mg / dtex) and the constant load (0.09 g / dtex) is kept constant, and the speeds V2 and V3 of R2 and R3 are changed. The speed V1 of R1 is always constant and is set to a constant load and the same tension. The crimp expression rate indicates a yarn shrinkage rate (crimp rate) due to crimp after passing through the heater, and is expressed by (V3−V2) / V3 × 100. According to this measurement result, since polytrimethylene terephthalate has a weak heat setting property, the crimp once heated and fixed is reset by applying heat again, and the crimp rate decreases. In particular, as shown in FIG. 1, the crimp rate starts to decrease clearly after 130 ° C. When heat setting is performed at a temperature exceeding 130 ° C., the crimp is reduced and the carpet is clearly inferior in bulkiness. In addition, since the crimp rate is reduced, the hard-use dust control mat used for a shoe sole or the like cannot withstand long-term use and is stubborn. On the other hand, even if the temperature is lower than 100 ° C, the twist is not fixed because of insufficient heat, and the bulkiness can be maintained as compared with the case where the temperature exceeds 130 ° C. When laundering is performed, the tip of the pile is unwound, resulting in a low aesthetic carpet with poor pencil point properties.

  In the method of the present invention, the crimped yarn for dust control mat obtained has a crimped elongation rate after boiling water treatment, and the crimped elongation rate after boiling water is the same as that of the crimped when treated in boiling water described later. It is preferable that the elongation rate indicating the expression rate is in the range of 15 to 30%, particularly 17 to 25%. If the crimp elongation rate after boiling water is within the range, crimps are sufficiently expressed, excellent in volume when used as carpet, and easy to manufacture because it is not necessary to heat the crimping process very severely. Becomes easier. On the other hand, if the crimp is too high, the yarn swells in the twisting process and untwisting occurs, so that the pencil point property is low, and the mat aesthetics tend to be unfavorable.

  In the method of the present invention, the cross section of the multifilament constituting the original multifilament crimped yarn is not particularly limited, but examples include known square, triangular, Y-shaped, flat cross section, etc. You may have. Among them, the Y-shaped cross section is optimal for achieving both the bulky and pencil point characteristics of carpet characteristics, and the ratio of the circumscribed circle diameter (B) to the inscribed circle diameter (A) (B / A cross-sectional shape having a degree of deformation represented by A) in the range of 1.5 to 3.0 is preferable. When the degree of deformation is less than 1.5, the bulkiness is inferior, the quality of the carpet is lowered, and when it exceeds 3.0, the pencil point property is deteriorated.

  In the method of the present invention, the crimped yarn for dust control mat obtained preferably has a boiling water shrinkage of 0.5 to 5% as a yarn physical property by boiling water treatment. If it is 5% or less, pile shrinkage at the time of carpet dyeing is suppressed, and a carpet rich in bulkiness can be obtained. Moreover, it is difficult to obtain a crimped yarn of 0.5% or less from the viewpoint of applying tension at the stage of loosening the crimp or at the stage of winding.

  In the method of the present invention, the fineness of the original multifilament crimped yarn is preferably 500 to 3000 dtex, particularly preferably 800 to 2000 dtex. If it is less than 500 dtex, the yarn-forming property is inferior, and the occurrence of yarn breakage during drawing or stable crimping cannot be performed. On the other hand, if it exceeds 3000 dtex, the number of filaments is increased and the single yarn fineness is increased, so that cooling at the time of spinning is not sufficiently performed, and an unfavorable tendency of inferior spinning performance is generated. At the same time, the single yarn fineness is preferably 10 to 30 dtex, more preferably 12 to 25 dtex. If it is less than 10 dtex, the single yarn is thin and the processability during tufting is inferior, and if it exceeds 30 dtex, there is an unfavorable tendency that the spinning property is inferior due to insufficient cooling during spinning.

  In the method of the present invention, the oil content of the obtained crimped yarn for dust control mat is preferably 0.4 to 0.8% by weight. When the content is less than 0.4% by weight, the passability of the crimped yarn is poor during tufting or twisting, and poor tufting is likely to occur. On the other hand, if it exceeds 0.8% by weight, the dust control mat of the present invention uses the original yarn, so that dust tends to adhere and easily become dirty when the initial dust control mat is used. The oil agent to be used is not particularly limited, and is mainly composed of a smoothing agent, an activator, an extreme pressure agent, an antistatic agent, an emulsifier, etc. that are usually used in fibers, and further an antioxidant, silicone, wax, etc. Is selected as an additive component, a compound is selected according to the application and purpose, and an appropriate blending ratio is selected to determine the composition. As a method of refueling, a certain amount may be applied by using an oiling roller, a refueling guide, and a mist injection device.

  In the method of the present invention, the original multifilament crimped yarn may be entangled before the twisting step. Entanglement may be applied by using a entanglement nozzle using compressed air, which is a known method. The number of entanglements to be applied is preferably in the range of 3 to 18 / m, particularly 8 to 14 / m. When it is less than 3 pieces / m, the processability of the yarn unwinding process tends to deteriorate during post-processing such as a twisting process. On the other hand, if it exceeds 20 pieces / m, when the dust control mat is used, the entangled converging portion is noticeable at the tip of the pile, and the surface quality of the carpet tends to be inferior.

  Below, an example of the manufacturing method for obtaining the crimped yarn for carpets of the present invention which is bulky and has good processability will be described.

  In the method of the present invention, generally known methods can be used for tufts in the production of melt spinning, spinning oil, drawing, crimping, entanglement, twisting yarns, and carpets comprising the same in the production of the original multifilament crimped yarn.

  As the melt spinning apparatus used in the present invention, both an extruder-type spinning machine and a pressure-type spinning machine can be used, but the former is preferable in terms of product uniformity and yield in the spinning process. In particular, since the crimped yarn for dust control mat of the present invention is an original yarn, an extruder type spinning machine is advantageous.

  The polymer formed into a filament shape by the melt spinning method is stretched and heat-set as necessary. In the stretching, a one-stage or two-stage multi-stage heat stretching method is adopted, and a steam processing apparatus or the like can be used in combination for the purpose of fixing the stretching point as an auxiliary. Since it is necessary to have some degree of orientation and crystallization, it is usually preferable to perform stretching 2 to 4 times. About extending | stretching temperature, 160-190 degreeC is employ | adopted.

  Next, crimp is imparted to the drawn yarn. Crimping can be applied by known heated fluid processing, and various crimping methods such as jet nozzle type, jet stuffer type and gear system can be adopted, but high crimping can be easily applied. From the above, the jet nozzle method and the jet stuffer method are more preferable. The temperature of the heating fluid applied to the yarn, that is, the crimping temperature is preferably 170 ° C to 250 ° C. In addition, for the purpose of fixing crimps, there is no limitation to a method of cooling with a cooling medium at the time of crimping stuffing, or to combining a rotary filter. In crimping, the drawn yarn may be continuously crimped without being wound as it is, or the unwound yarn or the one wound up at the drawn yarn stage is released and used for the crimping step. Also good.

  The yarn speed introduced into the crimp nozzle is usually preferably from 500 to 3500 m / min. When the yarn speed is within this range, efficient production is possible, crimping after passing through the nozzle is easy to fix, and stable running is easy.

  Next, entanglement is given to this, but it can be given by using a known entanglement nozzle using compressed air. In order to provide entanglement, the running yarn tension at the time of application and the pressure of compressed air are important. In order to sufficiently open the single fiber and impart high entanglement, it is preferable that the running tension is usually 0.2 g / d or less, particularly 0.1 g / d or less. Further, the air pressure may be appropriately set so that a predetermined number of entanglements is obtained in combination with the fineness and tension of the yarn. Usually, a range of 0.2 to 0.9 MPa is preferably used in order to impart high confounding and prevent the confounding node from becoming too stiff.

  Subsequently, the crimped yarn is wound around cheese, bobbins, cones and the like using a winding device such as a winder. Thus, an original multifilament crimped yarn is obtained.

  Next, a twisting process is performed using the above-described crimped yarn. As described above, as the twisted yarn, a known ring twisting machine, a double twister, or the like can be used, the number of twisted yarns is 150 to 220 T / m, and the heat setting temperature in steam is set to 100 to 130 ° C. .

  By the above method, the crimped yarn for dust control mat of the present invention can be obtained.

Next, the crimp yarn for dust control mat of the present invention is used as a face yarn, and a carpet is prepared using a known tufting machine. In general, when the basis weight is 700 to 1500 g / m ² or less and the pile height is in the range of 3.0 to 8.0 mm, the tuft is easy, and the carpet is excellent in texture and volume.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail using an Example, this invention is not limited at all by these Examples. In addition, the measuring method of each measured value in an Example is as follows.

(1) Intrinsic viscosity Using an Ostwald viscometer, the relative viscosity ηr of a solution in which 0.8 g of a sample was dissolved in 10 ml of orthochlorophenol was measured at 25 ° C. The measurement was performed twice and the average value was taken. ηr = t / t ₀
t: Solution dropping seconds t ₀ : Solvent (orthochlorophenol only) dropping seconds.

(2) Total fineness It measured by the method prescribed | regulated to JISL1090.

(3) Single yarn fineness The total fineness was converted per single yarn.

(4) Number of entanglements The crimped yarn was unwound to such an extent that entanglement could not be removed, and the number of entanglements per meter was measured visually. It calculated as an average value when measurement was performed 10 times.

(5) Crimp elongation after treatment with boiling water After winding the crimped yarn, after leaving it in a cheese-shaped atmosphere at 20 ° C. and a relative humidity of 65% for 20 hours or more, then letting it stand for 24 hours in skein, The crimp elongation rate when immersed in boiling water is shown, specifically the value measured by the following method.

  That is, the crimped yarn to be measured was immersed in boiling water for 20 minutes in an unloaded state and then dried to obtain an equilibrium moisture content. This sample was subjected to an initial load of 1.8 mg / dtex for 30 seconds. After marking, the sample length 50 cm (L3) was marked, then a constant load of 91 mg / dtex was applied to the sample, the elongation (L4) after 30 seconds was measured, and the above (L3) and (L4) The value obtained by calculating as the formula [(L4-L3) / L3] × 100 from the value of.

(6) Shrinkage rate after boiling water treatment After winding the crimped yarn, leave it in a cheese-shaped atmosphere at 20 ° C and a relative humidity of 65% for 20 hours or more, then take two skeins and leave it for 24 hours. In addition, the shrinkage rate was shown depending on the presence or absence of boiling water treatment. Specifically, it means a value measured by the following method.

  That is, a constant load of 91 mg / dtex was applied to one skein of the crimped yarn to be measured, and the length (L5) after 30 seconds was measured. Next, another skein yarn was immersed in boiling water for 20 minutes in an unloaded state and then dried to obtain an equilibrium moisture content. Next, a constant load of 91 mg / dtex was applied to the sample, and the length after 30 seconds had passed. (L6) was measured. The value obtained by calculating as the formula [(L5-L6) / L5] × 100 from the values of (L3) and (L4).

(7) Weight per unit area Measured by the method defined in JIS L1021 8.2.

(8) Bulkiness (bulkness after twisted yarn set)
Prepare four test sides that are cut into a pile of dust control mats by 30cm. A photograph is taken of the side of the test side magnified 10 times, and the pile thickness (Da: cm) is measured at 50 points. 2.54 cm / (number of pile rows per inch) = G Da / G × 100 average value. ○ The above was accepted.
100-90% ◎
89-80% ○
79-70%
69% ~.

(9) Sag resistance The thickness reduction by repeated compression specified in JIS L1022 7 was measured, and the thickness reduction rate was calculated. The sag resistance was good from the one with a small thickness reduction rate, and was judged according to the following criteria. ○ The above was accepted.
Thickness reduction rate: 0 to 10% ◎
11-20 ○
21-30%
31-x.

(10) Pencil point property Prepare four test sides cut into a pile of dust control mat for one row x 30 cm. Take a picture of the side of the test side magnified 10 times, measure the pile tip thickness (Db) and pile root thickness (Da) 50 points, the average of (Db) / (Da) × 100 Let the value be the value.
○ The above was accepted.
100-115% ◎
116-130% ○
131-145% △
146-x.

(11) Light resistance The twisted yarn set yarn was formed into a tubular knitted fabric, and the carbon arc lamp dyeing fastness was tested according to JIS standard L0842. Grade 4 or higher is accepted.

[Examples 1-5, Comparative Examples 2-5]
A chip of poly (trimethylene terephthalate) containing 1.4% intrinsic viscosity and 0.3% titanium oxide (average particle size 0.3 μm) is converted to 10% poly (trimethylene terephthalate) carbon black having an intrinsic viscosity of 1.2. Before melting, the master chip is weighed and kneaded with Micosuper so that the pigment content is 1% of the total polymer, melt-spun at 250 ° C with an extruder-type spinning machine, and cooled, lubricated, and stretched at a speed of 2800m / Min, stretching temperature of 170 ° C., stretching ratio of 3.1 times, and using a jet nozzle (JN), which is a known heating fluid processing device, without continuous winding, crimping steam pressure 0.7 MPa, Crimping is performed at a crimping temperature of 210 ° C., cooling is performed, air pressure is 0.2 Mpa, yarn tension just before the entanglement nozzle is applied at 70 g, and entanglement is applied to wind up. 0dtex / 54fil, crimp ratio 22.0% after boiling water shrinkage of 3.0% to obtain a polytrimethylene terephthalate crimped yarn Y-shaped cross-section of the deformation degree 2.5. The number of yarn entanglement was 8 / m.

Then, the two obtained crimped yarns were twisted, and the yarns subjected to twisting and heat setting under the conditions of Table 1 were tufted at 1000 rpm using 1600 crimped yarns with a known level cut tuft machine, A dust control mat having 10 pile rows per inch (1/10 gauge), a pile height of 7 mm, and a basis weight of 1000 g / m ² was obtained. The evaluation results of the dust control mat are shown in Table 1.

[Comparative Example 1]
A polytrimethylene terephthalate chip is melt-spun at 250 ° C. with an extruder-type spinning machine, cooled, lubricated, stretched at a speed of 2800 m / min, stretched at a temperature of 170 ° C. and a stretch ratio of 3.1 times, and subsequently wound up. Without using a jet nozzle (JN), which is a known heated fluid processing device, cooling is performed by applying crimp at a crimping steam pressure of 0.7 MPa and a crimping processing temperature of 210 ° C., and an air pressure of 0.2 MPa. The yarn tension just before the entanglement nozzle is 70g and wound up, wound up, 1450dtex / 54fil, crimp rate after boiling water 22.0%, shrinkage rate 3.0%, deformation degree 2.5 polymorph of Y-shaped cross section A trimethylene terephthalate crimped yarn was obtained. The number of yarn entanglement was 8 / m.

Then, the two obtained crimped yarns were twisted, and the yarns subjected to twisting and heat setting under the conditions of Table 1 were tufted at 1000 rpm using 1600 crimped yarns with a known level cut tuft machine, A dust control mat having 10 piles per inch (1/10 gauge), a pile height of 8 mm, and g / m ² was obtained.
Thereafter, disperse dye (gray) was 0.01% (carpet weight ratio) and dyed under normal pressure.
The evaluation results of the dust control mat are shown in Table 1.

  In Examples 1 to 5, the bulkiness, sag resistance, pencil point property, and light resistance were acceptable standards. In Comparative Example 1, the light resistance was not acceptable due to the dyeing process, not the original yarn. In Comparative Example 2, since the number of twists was as low as 140 T / m, the pencil point property was unacceptable. In Comparative Example 3, the number of twists was too high at 230 T / m, so that the dust control mat had a thin pile and poor bulkiness. In Comparative Example 4, since the temperature of the heat set is low, there is no problem in bulkiness and sag resistance, but since the twist is not fixed, the pencil point property is low, and the aesthetics of the pile tip being opened by long-term use The carpet was inferior. In Comparative Example 5, since the heat setting temperature was high, the twist was fixed, and there was no problem with the pencil point property, but because the temperature was too high, the crimp was reset and the bulkiness was significantly reduced.

  According to the present invention, while taking advantage of the antifouling property specific to polytrimethylene terephthalate, the bulkiness and sagability due to the difficulty of heat setting, which was a problem of polytrimethylene terephthalate, improved the pencil point property, long-term A crimped yarn for a dust control mat excellent in maintaining the surface aesthetics of a carpet after use can be produced.

Correlation diagram of temperature and crimp rate by TYT measurement It is the schematic of a TYT measuring machine (made by Lowson-Hemphill).

Claims (5)

  A crimped yarn for a dust control mat, characterized in that the original multifilament crimped yarn made of polytrimethylene terephthalate is subjected to various twists of 150 to 220 T / m and then heat-set with steam at 100 to 130 ° C. Manufacturing method.   The method for producing a crimped yarn for a dust control mat according to claim 1, wherein the multifilament crimped yarn contains carbon black and titanium oxide as pigments.   The method for producing a crimped yarn for a dust control mat according to claim 1 or 2, wherein the crimped elongation after the boiling treatment of the multifilament crimped yarn is 15 to 30%.   The cross section of the multifilament crimped yarn is a Y-shaped cross section, and the degree of cross-sectional deformation is 1.5 to 3.0, The scissor for dust control mats according to any one of claims 1 to 3 A method for producing crimped yarn.   The original multifilament crimped yarn made from polytrimethylene terephthalate is subjected to various twists of 150 to 220 T / m, then heat-set with steam at 100 to 130 ° C., and the resulting multifilament crimped yarn is piled Manufacturing method of dust control mat used as

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