JP5105619B2 - Original polyethylene terephthalate false twisted yarn, method for producing the same, and carpet using the same - Google Patents

Description

  The present invention relates to an original polyethylene terephthalate false twisted yarn, a method for producing the yarn, and a carpet using the yarn. More specifically, the present invention relates to a residential carpet that is excellent in volume and texture, using an original polyethylene terephthalate false twisted yarn excellent in high crimp characteristics as at least a part of the face yarn.

  In addition, the use of polyethylene terephthalate resin produced by bottle recycling in the polyethylene terephthalate resin composition that is the raw material of the original polyethylene terephthalate false twisted yarn reduces carbon dioxide emissions related to global warming to the atmosphere. Related to technology.

  Polyester fibers are used as various pile materials taking advantage of their excellent resilience and friction fastness. In recent years, in a recycling-oriented social environment, continuous bulky crimped yarns of polyester filaments, that is, polyester multifilaments, which are environmentally friendly materials, have attracted attention as face yarns for carpets.

  On the other hand, disposal of used plastic waste generated in large quantities has become a major problem, and as a countermeasure, we collect and collect polyethylene terephthalate bottles that are generated in large quantities from the viewpoint of resource reuse. Therefore, it is recommended to recycle as polyethylene terephthalate resin again. Above all, beverage bottles are mostly made of polyethylene terephthalate, which is stable in material, inexpensive and excellent in recyclability, so it can be used as a raw material for polyethylene terephthalate continuous bulky crimped yarn for carpets. Useful.

 Polyethylene terephthalate multifilament has a higher specific gravity than other fiber materials such as polyamide filament and polyolefin filament, and it is difficult to obtain sufficient crimp characteristics. In many cases, it was not suitable for carpets.

  In order to obtain crimping performance suitable for carpet face yarn from polyethylene terephthalate multifilament, it is necessary to stretch the polyethylene terephthalate multifilament at a high draw ratio in front of the heated fluid crimping device. There has been a problem that yarn breakage occurs or yarn breakage occurs inside the heated fluid crimping apparatus. The upper limit of the crimping performance of the fiber produced from the heated fluid crimping device (bulky continuous crimping device) is limited, and it is difficult to obtain a high crimped yarn with a volume feeling.

  The above-mentioned problem is a phenomenon that occurs particularly noticeably in the case of polyethylene terephthalate multifilaments, and in the conventionally known technique, for carpets that satisfy both the stabilization of the drawing process and the expression of volume feeling due to excellent high crimp characteristics. The actual situation is that polyethylene terephthalate fiber has not been realized, and this still left a problem to be solved.

  Conventionally, Patent Literature 1, Patent Literature 2 and Patent Literature 3 are disclosed regarding a yarn obtained by continuously bulking crimped polyethylene terephthalate fiber (so-called polyethylene terephthalate crimped yarn), a carpet using the yarn, and a manufacturing method thereof. .

  Patent Document 1 states that “a polyester crimped yarn for carpet that can provide a carpet that is excellent in bulkiness and durability and that can be reduced in weight by good covering properties, and using this polyester crimped yarn as a face yarn. To provide a carpet having excellent performance especially for automobiles. As a means for solving the problem, “the characteristics of polyester crimped yarn for carpets simultaneously satisfy specific physical property values”. In particular, polyester crimped yarns having specific viscosity, hollow cross-sectional shape, crimp elongation, total fineness, and carpets using the same as yarns are described. ing.

  Patent Document 2 states that “polyester crimped yarn for carpet that has a soft and soft touch and can provide a carpet having excellent durability, and excellent for a residential use that uses this polyester crimped yarn as a face yarn. "Providing a tufting carpet having performance and ease of reuse after use." As a means for solving the problem, "characteristics of polyester crimped yarn for carpet satisfy specific physical property values at the same time. In particular, polyester crimp yarns with specific viscosity, flatness of flat cross-section yarn, single yarn fineness, total fineness, and crimp elongation rate, and use as face yarns are disclosed. Was talking about the carpet that was.

  Patent Document 3 has an object of “providing a polyester continuous bulky filament having a performance equivalent to that of a nylon continuous bulky crimped yarn and being inexpensive for use as a dascon mat”. It is disclosed as “polyester continuous bulky yarn having a cross-sectional shape and a cross-sectional hollow ratio with specific physical property values”.

JP-A-8-127916 Japanese Patent Laid-Open No. 8-1003000 JP-A-9-95834

  The technique of the above-mentioned technical document 1 is excellent in bulkiness and durability, and has a polyester crimped yarn for carpets that can be reduced in weight by a good covering property, and uses this polyester crimped yarn, especially for automobiles. Mentions carpets with excellent performance. The crimp elongation rate of the polyester crimp yarn for carpet is 15% or more. Looking at the examples, the crimp elongation rate of the polyester crimp yarn is 31.5% at most. Further, there is no description in the specification of a polyester crimped yarn having a higher crimp elongation, and there is no description regarding obtaining a high crimp performance by false twisting the polyester crimped yarn.

  The technology of the above-mentioned technical document 2 refers to a polyester crimped yarn for carpet having a soft and soft touch and excellent in durability, and a carpet having excellent performance for home use and easy reuse after use. ing. The crimp elongation of the polyester crimped yarn for carpet is 3 to 20%, the crimp elongation of the polyester crimped yarn is not described in the specification with respect to a high crimp elongation of 20% or more, and the polyester There is no description about obtaining a high crimp performance by false twisting the crimped yarn.

  Moreover, the technique of the said technical document 3 has the performance equivalent to a nylon continuous bulky crimped yarn for dascon mats, and mentions the cheap polyester continuous bulky filament. However, there is no description in the specification regarding the crimp elongation of the polyester continuous bulky filament. And there is no description about obtaining a high crimp performance by false twisting a polyester continuous bulky filament.

  An object of the present invention is to overcome the above-described problems and provide an original polyethylene terephthalate false twisted yarn that cannot be achieved by the prior art. That is, more specifically, it is to provide an original polyethylene terephthalate false twisted yarn excellent in high crimp characteristics, a production method thereof, and a carpet excellent in volume feeling and texture using the same.

  Furthermore, the present invention provides an original polyethylene terephthalate false twisted yarn having a high fineness of 500 dtex or more suitable for a raised fabric or a thick fabric excellent in high crimp characteristics, a method for producing the same, and a carpet excellent in volume and texture. For the purpose.

  In order to achieve the above-mentioned object, the present inventor has further improved the crimp characteristics of the original polyethylene terephthalate crimped yarn, and as a result of earnest research on dramatic improvement in crimp performance, While limiting the properties to a specific configuration, limiting the intrinsic viscosity to a specific range, and limiting the strength, elongation, total fineness, single yarn fineness, and dry heat crimp rate to each specific range, By using polyethylene terephthalate crimped yarn as original polyethylene terephthalate false twisted yarn, the strength, elongation and dry heat crimp rate are limited to specific ranges, respectively, and the original polyethylene having a large fineness of 500 dtex or more suitable for napped fabrics. It came to discover that a terephthalate false twisted yarn was obtained, and completed this invention. That is, the present invention provides the following means.

[1] A polyethylene terephthalate crimped yarn containing 0.01 to 3.0% by mass of a colorant and having an intrinsic viscosity of 0.580 to 0.620 and having a strength of 2.65 to 3.74 cN / dtex. False twisting of polyethylene terephthalate crimped yarn having an elongation of 30 to 45%, a total fineness of 500 to 3,000 dtex, a single yarn fineness of 1.5 to 30 dtex, and a dry heat crimp rate of 10 to 30% Made of polyethylene terephthalate false twisted yarn,
The polyethylene terephthalate false twisted yarn has a strength of 2.65 to 3.31 cN / dtex, an elongation of 25 to 35%, and a dry heat crimp rate of 30 to 50%. .

[2] The original polyethylene terephthalate false twisted yarn according to the above item, wherein at least one pigment selected from the group consisting of an inorganic pigment and an organic pigment is used as the colorant.

[3] The original polyethylene terephthalate false twisted yarn comprises a polyethylene terephthalate resin produced by material recycling and / or a resin composition with a polyethylene terephthalate resin produced by polymerization, and a mass ratio of 100/0 to 30 / 3. The original polyethylene terephthalate false twisted yarn according to item 1 or 2, wherein the yarn is 70.

[4] The intrinsic polyethylene terephthalate false twisted yarn has an intrinsic viscosity of 0.620 to 0.670 of polyethylene terephthalate resin produced by material recycling, and an intrinsic viscosity of polyethylene terephthalate resin produced by polymerization of 0.610. The original polyethylene terephthalate false twisted yarn according to any one of items 1 to 3, wherein the yarn is ˜0.650.

[5] The original polyethylene terephthalate false twist yarn according to items 1 to 4, wherein the polyethylene terephthalate resin produced by material recycling used for the original polyethylene terephthalate false twist yarn is produced by bottle recycling.

[6] A carpet characterized by using the original polyethylene terephthalate false twist yarn according to any one of items 1 to 5 as at least a part of a face yarn.

[7] The carpet according to [6], which is used for dwelling.

[8] A polyethylene terephthalate crimped yarn containing 0.01 to 3.0% by mass of a colorant and having an intrinsic viscosity of 0.580 to 0.620 and having a strength of 2.65 to 3.74 cN / dtex. , Overfeed rate using a polyethylene terephthalate crimped yarn having an elongation of 30 to 45%, a total fineness of 500 to 3,000 dtex, a single yarn fineness of 1.5 to 30 dtex, and a dry heat crimp rate of 10 to 30% False twisting by heat-treating with a heat treatment apparatus set at 180-220 ° C. under conditions of −10 to −2%,
An original polyethylene terephthalate false twisted yarn comprising a heat treatment step of heat treating the false twisted yarn with a heat treatment apparatus set at 150 to 190 ° C. under an overfeed rate of 10 to 25%. Production method.

[9] The method for producing an original polyethylene terephthalate false twisted yarn according to item 8 above, wherein the false twisting device is a pin false twist device.

[10] An original polyethylene terephthalate false twisted yarn produced by the production method according to 8 or 9 above.

[11] A carpet characterized by using the original polyethylene terephthalate false twisted yarn according to item 10 as at least a part of a face yarn.

[12] The carpet according to the above item 11, which is used for dwelling.

The original polyethylene terephthalate false twisted yarn according to the invention of [1] limits the intrinsic viscosity of the original polyethylene terephthalate crimped yarn to a specific range, and has strength, elongation, total fineness, single yarn fineness and dry heat crimp rate. Is limited to a specific range, and is obtained by false twisting using such a specific original polyethylene terephthalate crimped yarn, so that the strength is 2.65 to 3.31 cN / dtex, the elongation. Is 25 to 35%, and the dry heat crimp rate is 30 to 50%, and has high crimp characteristics and excellent volume feeling and texture.

In the invention of [2], since at least one pigment selected from the group consisting of inorganic pigments and organic pigments is used as the colorant, the heat resistance is higher than when other colorants such as dyes are used. There is an advantage that light resistance and weather resistance can be improved. (That is, the heat resistance is not sufficiently obtained because the dye is easily thermally decomposed).

In the invention of [3], a polyethylene terephthalate resin composition which is a raw material of the original polyethylene terephthalate false twisted yarn is a resin composition of a polyethylene terephthalate resin produced by material recycling and / or a polyethylene terephthalate resin produced by polymerization, Since the mass ratio is 100/0 to 30/70, the production and properties of the original polyethylene terephthalate crimped yarn are excellent, and the production and properties of the original polyethylene terephthalate false twisted yarn are excellent. As a result, the carpet Carpet characteristics with excellent volume and texture.

In the invention of [4], the intrinsic viscosity of the polyethylene terephthalate resin composition that is the raw material of the original polyethylene terephthalate false twisted yarn is 0.620 to 0.670 of polyethylene terephthalate resin produced by material recycling, and produced by polymerization. Since the polyethylene terephthalate resin is 0.610 to 0.650, it is excellent in production and properties of the original polyethylene terephthalate crimped yarn, and is excellent in production and properties of the original polyethylene terephthalate false twisted yarn. Carpet characteristics with excellent volume and texture.

In the invention of [5], the polyethylene terephthalate resin produced by material recycling that constitutes the polyethylene terephthalate resin composition that is the raw material of the original polyethylene terephthalate false twisted yarn is bottle recycling, so that the intrinsic viscosity is 0.620-0. .670 material recycled polyethylene terephthalate resin can be stably obtained.

The carpet of the invention of [6] uses the original polyethylene terephthalate false twisted yarn of any one of [1] to [5] as part of the face yarn, so it has a sufficient volume feeling and a good texture. is there.

The carpet of the invention of [7] uses the original polyethylene terephthalate false twisted yarn of any one of [1] to [5] as part of the face yarn, so it has a sufficient volume feeling and a good texture. Yes, suitable for residential use.

[8] In the invention of [8], the original polyethylene terephthalate crimped yarn whose yarn characteristics are limited to a specific range is heat-treated with a heat treatment apparatus set at 180 to 220 ° C under the condition of an overfeed rate of -10 to -2%. After false twisting, heat treatment is performed with a heat treatment apparatus set at 150 to 190 ° C. under conditions of an overfeed rate of 10 to 25%, so that the original polyethylene terephthalate false twisted yarn has high crimp characteristics and excellent volume feeling and texture. Can be manufactured.

In the invention of [9], since the device for performing the false twisting is a pin false twist device, it is possible to obtain an original polyethylene terephthalate false twisted yarn excellent in high crimp characteristics, and at the same time, excellent in volume and texture. The production method of the original polyethylene terephthalate false twisted yarn.

In the invention of [10], since it is produced by the production method described in [8] or [9] above, an original polyethylene terephthalate false twisted yarn having high crimp characteristics and excellent volume feeling and texture can be obtained. it can.

[11] The carpet according to the invention of [11] uses the original polyethylene terephthalate false twisted yarn described in [10] as part of the face yarn, and thus has a sufficient volume feeling and a good texture.

The carpet according to the invention of [12] is suitable for residential use since it has a sufficient volume feeling and good texture because it is used for residential use with the carpet described in [11] above.

  In the present invention, the crimping characteristics of the original polyethylene terephthalate false twisted yarn and the improvement of the volume feeling and texture of the final product resulting from it are intensively studied, and the intrinsic viscosity (IV) of the constituent polymer is selected as a specific one. In addition, the original polyethylene terephthalate cocoon having a shape containing a colorant in advance and further having fiber characteristics such as strength, elongation, total fineness, single yarn fineness, and dry heat crimp rate within a specific range. When the crimped yarn was limited to a specific false twist heater temperature and an overfeed rate range and false twisted, an original polyethylene terephthalate false twist yarn and a method for producing the same were obtained. Such an original polyethylene terephthalate false twisted yarn is obtained by spinning a polyethylene terephthalate polymer and crimping the crimped yarn and then further false twisting it.

  The intrinsic polyethylene terephthalate false twisted yarn according to the present invention has an intrinsic viscosity (IV) of 0.580 to 0.620. The original polyethylene terephthalate false twisted yarn of the present invention comprises a polyethylene terephthalate composition containing a colorant and polyethylene terephthalate.

  Such an original polyethylene terephthalate false twisted yarn is a yarn obtained by making a polyethylene terephthalate polymer and crimping the crimped yarn and then false twisting.

  The polyethylene terephthalate polymer which is the raw material of the original polyethylene terephthalate false twisted yarn of the present invention is a polyester comprising 90% by mole or more, preferably 95% or more of all repeating units of the molecular chain, and the polyester to be used is A third component other than terephthalic acid and ethylene glycol can be included as long as the constitutional requirements and purpose of the invention are not impaired.

  The intrinsic viscosity (IV) of the original polyethylene terephthalate false twisted yarn of this invention needs to be 0.580 to 0.620. Here, the intrinsic viscosity is a value measured with a mixed solution of 20 ° C. and phenol / tetrachloroethane = 60/40 (mass ratio). When the intrinsic viscosity is less than 0.580, sufficient crimping performance cannot be imparted to the polyethylene terephthalate false twisted yarn, and the physical properties, particularly strength, of the false twisted yarn is lowered. On the other hand, when the intrinsic viscosity exceeds 0.620, the intrinsic viscosity of the polyethylene terephthalate resin as a raw material becomes 0.660 or more, which causes a problem that spinning becomes difficult. Among these, the intrinsic viscosity of the original polyethylene terephthalate false twisted yarn is preferably 0.590 to 0.610.

  The polyethylene terephthalate resin manufactured by material recycling used for the original polyethylene terephthalate false twisted yarn of the present invention is manufactured by bottle recycling. The polyethylene terephthalate resin for bottles has an intrinsic viscosity (IV) as high as about 0.800, and does not contain additive components such as those found in polyethylene terephthalate film end materials. The fiber grade recycled polyethylene terephthalate resin used in the present invention can be easily produced, and a stable quality can be sufficiently obtained. If a kneader with a biaxial vent is used, the intrinsic viscosity (IV) of the polyethylene terephthalate resin can be controlled to 0.620 to 0.670.

  The polyethylene terephthalate resin manufactured by polymerization used for the original polyethylene terephthalate false twisted yarn of the present invention is manufactured as a polyethylene terephthalate resin for fiber grade, and can be obtained from chemical manufacturers, synthetic fiber manufacturers, and the like. The intrinsic viscosity (IV) of a general polyethylene terephthalate resin for fiber grade is in the range of 0.610 to 0.650.

  Moreover, the polyethylene terephthalate composition used as a raw material of the original polyethylene terephthalate false twisted yarn of the present invention has a constitution containing 0.01 to 3.0% by mass of a colorant. By setting to such a density | concentration, the color of a suitable density | concentration can be provided to a false twisted thread, and the design property can be improved. Moreover, generation | occurrence | production of the color nonuniformity resulting from pigment nonuniformity can be prevented by setting it as 0.01 mass% or more, and generation | occurrence | production of thread breakage can fully be prevented by setting it as 3.0 mass% or less. Especially, it is preferable that the content rate of a coloring agent is 0.05-1.0 mass%. The colorant may be used in combination with a commonly used dispersant (such as an olefin compound).

  The polyethylene terephthalate composition includes a polymer (including polymer particles) other than polyethylene terephthalate, a matting agent, a plasticizer, a flame retardant, and an antistatic agent as long as the effects of the present invention are not impaired. Various additives such as an agent, a deodorant, an antibacterial agent, an antioxidant, a heat-resistant agent, a light-resistant agent, and an ultraviolet absorber may be included as necessary.

Furthermore, the original polyethylene terephthalate false twisted yarn of this invention is a false twisted yarn obtained by false twisting an original polyethylene terephthalate crimped yarn satisfying the following characteristics 1 to 5,
1: Strength is 2.65 to 3.74 cN / dtex
2: Elongation is 30-45%
3: Total fineness of 500 to 3,000 dtex
4: Single yarn fineness of 1.5 to 30 dtex
5: Dry heat crimp rate is 10-30%
This is an original polyethylene terephthalate false twisted yarn that simultaneously satisfies the following properties (1) to (3).
(1) Strength is 2.65 to 3.31 cN / dtex
(2) Elongation is 25 to 35%
(3) Dry heat crimp rate is 30-50%

  The original polyethylene terephthalate crimped yarn used for false twisting of the present invention has a strength of 2.65 to 3.74 cN / dtex. If the strength of the crimped yarn is less than 2.65 cN / dtex, the false twisted yarn strength after false twisting may be reduced and a part of the false twisted yarn may be worn when used as a final product. Abrasion resistance cannot be imparted. Among them, the strength of the original polyethylene terephthalate crimped yarn is preferably 2.87 to 3.74 cN / dtex, more preferably 3.09 to 3.53 cN / dtex.

  Further, the elongation of the original polyethylene terephthalate crimped yarn is 30 to 45%. If the elongation of the crimped yarn is less than 35%, the false twisted yarn elongation after false twisting may be reduced and a part of the false twisted yarn may be worn when used as a final product. Abrasion cannot be imparted. Among these, the elongation of the original polyethylene terephthalate crimped yarn is more preferably 35 to 45%.

  The original polyethylene terephthalate crimped yarn used for false twisting of the present invention has a total fineness in the range of 500 to 3,000 dtex. If it is such a range, it will become the original polyethylene terephthalate crimped yarn especially suitable for a carpet use, for example, However, It is not limited to the use for such a use especially. Among these, the total fineness of the original polyethylene terephthalate crimped yarn is preferably in the range of 600 to 2,500 dtex, and is preferable as the optimum total fineness for carpet applications utilizing the characteristics of false twisted yarn with a large fineness.

  The single yarn fineness of the original polyethylene terephthalate crimped yarn is in the range of 1.5 to 30 dtex. When the single yarn fineness is less than 1.5 dtex, it is difficult to stably false twist the original polyethylene terephthalate false twisted yarn of the present invention, and for example, the volume feeling of the polyethylene terephthalate false twisted yarn when used as a carpet is insufficient. On the other hand, with a false twisted yarn having a single yarn fineness exceeding 30 dtex, it is difficult to obtain the yarn physical properties of the original polyethylene terephthalate false twisted yarn of the present invention. The original polyethylene terephthalate crimped yarn used for false twisting of the present invention has a single yarn fineness constituting the crimped yarn of 1.5 to 25 dtex, preferably 1.75 to 20 dtex, more preferably 2. 0-15 dtex.

  The dry heat crimp rate of the original polyethylene terephthalate crimped yarn used for false twisting of the present invention is in the range of 10 to 30%. This dry heat crimp rate is a parameter indicating the crimp performance latent in the polyethylene terephthalate crimp yarn, and the polyethylene terephthalate crimp yarn is treated with hot air at 120 ° C. to develop the crimp, and the degree of the crimp It is the value which showed. When the dry heat crimp rate is less than 10%, the crimped performance of the false twisted yarn after false twisting is inferior. On the other hand, it is difficult to stably produce a polyethylene terephthalate crimped yarn having a dry heat crimp rate of more than 30%. Especially, it is preferable that the dry heat crimp rate of the said original polyethylene terephthalate crimped yarn is in the range of 15 to 25%.

  The number of entanglements of the original polyethylene terephthalate crimped yarn used for false twisting of the present invention is preferably 15 to 35 / m, and preferably 18 to 30 / m. By performing the entanglement process, the yarn path can be stabilized by pulling out the crimped yarn from the bobbin during false twisting, false twist, and winding the false twist yarn.

  Crimping in the yarn direction of the original polyethylene terephthalate false twisted yarn by appropriately setting the number of entanglements (entangles) (ke / m) of the original polyethylene terephthalate crimped yarn used for false twisting of the present invention. The expression state can be made uniform.

  The original polyethylene terephthalate false twisted yarn of the present invention, which is false twisted using the original polyethylene terephthalate crimped yarn, has a strength of 2.65 to 3.31 cN / dtex and an elongation of 25 to 35%. . If the strength is less than 2.65 cN / dtex or a false twisted yarn having an elongation of less than 25%, the final product is inferior in abrasion resistance, and part of the false twisted yarn may be worn out during use. The strength of the original polyethylene terephthalate false twisted yarn is preferably a crimped yarn having a strength of 2.75 to 3.31 cN / dtex and an elongation of 25 to 30%. In addition, when false twisting is performed using the original polyethylene terephthalate crimped yarn, it is difficult and impractical to make the false twist strength stronger than 3.31 cN / dtex and the elongation to exceed 35%. .

  Moreover, the dry heat crimp rate of the original polyethylene terephthalate false twisted yarn of the present invention, which is false twisted using the original polyethylene terephthalate crimped yarn, is a parameter indicating the latent crimp performance of the polyethylene terephthalate false twisted yarn, The polyethylene terephthalate false twisted yarn is treated with hot air at 120 ° C. to develop crimps, and indicates the degree of crimp. The dry heat crimp rate of the original polyethylene terephthalate false twisted yarn of the present invention is 30 to 50%. Preferably, the dry heat crimp rate is 35 to 45%. If it is less than 30%, crimp expression is still insufficient, and the sense of volume as a final product is insufficient. On the other hand, a dry heat crimp rate exceeding 50% of the original polyethylene terephthalate false twisted yarn is difficult to obtain with the current manufacturing technology.

  The colorant used for the original polyethylene terephthalate false twisted yarn of the present invention is an inorganic pigment or an organic pigment suitable for the polyethylene terephthalate false twisted yarn. Specifically, inorganic pigments such as carbon black, oxidized inorganic pigments, ferrocyanide inorganic pigments, silicate inorganic pigments, carbonate inorganic pigments, phosphate inorganic pigments, phthalocyanine organic pigments, perylene organic pigments, isoindo At least one pigment selected from linone-based organic pigments and the like is used. The colorant of the present invention is a general term for pigments used to give a certain color to a molded product such as a fiber.

  For example, inorganic pigments include oxides such as titanium oxide, zinc white, titanium yellow, zinc-iron-based brown, titanium-cobalt green, cobalt green, cobalt blue, copper-iron-based brown, and ferrocyans such as bitumen. Chemicals, silicates such as ultramarine, carbonates such as calcium carbonate, phosphates such as manganese violet, carbon black, aluminum powder and bronze powder, and titanium powder-coated mica are used. Further, as the organic pigment, phthalocyanine series such as copper phthalocyanine blue, copper phthalocyanine green and brominated copper phthalocyanine green, perylene series such as perylene scarlet, perylene rare and perylene maroon, and isoindolinone series are used.

  The added concentration of the colorant is 0.01 to 3.0% by mass, preferably 0.05 to 1.0% by mass, based on the color density as the total amount of the colorant per polymer weight. . The colorant can also be used in combination with a commonly used dispersant.

  The original polyethylene terephthalate false twisted yarn of the present invention can develop crimps latent in a heat setting process after tufting, usually by dry heat treatment and / or steam treatment.

  The above-identified original polyethylene terephthalate false twisted yarn of the present invention is excellent in crimping properties of false twisted yarn and the like, and tufted carpet using this false twisted yarn is excellent in volume and has a good texture.

  The original polyethylene terephthalate false twisted yarn of the present invention can be used as residential carpets such as roll carpets, piece carpets, tile carpets, household rugs and mats, and can be used in many applications where the characteristics of the carpets of the present invention can be utilized. Can be used. Further, the pile may have any pile shape such as loop pile, cut pile, cut and loop pile, and can be used not only for tufted carpets but also for woven carpets, embroidery carpets, knitted carpets, adhesive carpets, and the like.

  The original polyethylene terephthalate false twisted yarn of the present invention and the production method thereof will be specifically described.

  First, polyethylene terephthalate is spun to obtain a spun yarn. (Spinning process). For example, as shown in FIG. 1, an extruder (12) equipped with a vent (13) by introducing polyethylene terephthalate from a polyethylene terephthalate inlet (10) and a colorant (pigment) from a colorant inlet (11). After melt-kneading in the inside, it is extruded from a spinneret (15) attached to the tip of the spinning head (14) to form a filament. Moreover, the mixing amount of the colorant is such that the colorant content is in the range of 0.01 to 3.0% by mass. The melt kneading temperature in the extruder (12) is preferably set to 285 to 295 ° C. As the polyethylene terephthalate, one having an intrinsic viscosity of 0.610 to 0.670 is used. Preferably, 0.620 to 0.660 is used. Since the strength, elongation, crimp characteristics and the like of the original polyethylene terephthalate false twisted yarn of the present invention have a great influence on the final product, the specified intrinsic viscosity polymer is preferable. In addition, as the inorganic pigment and the organic pigment used as the colorant, at least one pigment selected from the specified compounds is used. Further, a master batch obtained by adding a colorant to polyethylene terephthalate can be spun. Furthermore, in order to improve the dispersion of the colorant in the polymer, a dispersant such as an olefin compound can be used.

  Polyethylene terephthalate generally has an official moisture content in the polymer of 0.4 to 0.5% by mass (4,000 to 5,000 ppm). In order to use polyethylene terephthalate for melt spinning, the water content in polyethylene terephthalate is preferably 0.01% by mass (100 ppm) or less, and more preferably 0.005% by mass (50 ppm) or less. In the case of using a vented twin screw extruder as the extruder (12), it is possible to sufficiently use undried polyethylene terephthalate, and melt spinning can be performed while maintaining the intrinsic viscosity of polyethylene terephthalate. .

  The shape and dimensions of the holes of the spinneret (15) are designed so as to obtain the desired polyethylene terephthalate fiber in consideration of the melt viscosity of polyethylene terephthalate, the spinning temperature, the cooling conditions after spinning, and the like.

  Next, the filament extruded from the spinneret (15) is cooled by cold air from the cold air spraying device (16). (Refer FIG. 1) It is preferable that the temperature of cold air is 10-30 degreeC, More preferably, it is 15-25 degreeC.

  Thereafter, an oil agent is applied to the filament by an oil agent applying device (17), and then the yarns are converged to obtain a spun yarn. Although it does not specifically limit as said oil agent, For example, what has a smoothing agent as a main component and contains an emulsifier, an antistatic agent, etc. is mentioned.

  By applying the oil agent, it is possible to ensure stable strength and elongation in the spinning / drawing step in the production of the original polyethylene terephthalate crimped yarn and secure the stability of the crimp expression state in the crimping step. . In addition, it is possible to suppress the generation of static electricity in the final product using the original polyethylene terephthalate crimped yarn.

  Next, the spun yarn is wound and taken up by a take-up roller (1) rotating at a predetermined speed. The take-up speed of the take-up roller (1) is preferably 400 to 800 m / min. When the take-up speed is less than 400 m / min, the yarn tension at the time of spinning becomes too low, which is not preferable. On the other hand, when the take-up speed exceeds 800 m / min, the drawing speed and crimping process become high, and thus it is difficult to manufacture with the current practical process.

  Next, the spun yarn taken up by the take-up roller (1) is heat-drawn in one or more stages using roller groups (2), (3), and (4). That is, first, the drawn spun yarn is guided to a preheating roller (2), and the preheated roller (2) preheats the spun yarn. At this time, it is preferable to set the temperature of the preheating roller (2) in the range of 85 to 105 ° C. When the temperature is set in such a range, uniform preheating can be realized. Especially, it is more preferable to set the temperature of the preheating roller (2) in the range of 90 to 100 ° C.

  Thereafter, the spun yarn is guided from the preheating roller (2) to the drawing roller (3). At this time, the temperature of the stretching roller (3) is set in the range of 100 to 125 ° C. If it is less than 100 ° C., stretching unevenness tends to occur, and it is difficult to sufficiently stretch, and yarn breakage is likely to occur. On the other hand, when the temperature exceeds 125 ° C., the drawn yarn may be adhered. The temperature of the stretching roller (3) is preferably set in the range of 100 to 125 ° C, particularly preferably 100 to 115 ° C.

  Moreover, a draw ratio shall be 3.0 to 5.0 times. If it is less than 3 times, sufficient strength cannot be obtained, and if it exceeds 5 times, fluff is remarkably generated. Especially, it is preferable that the said draw ratio shall be 3.5-4.5.

  By setting the temperature of the drawing roller (3) in the range of 100 to 125 ° C. and setting the draw ratio to 3.0 to 5.0 times, the strength of the original polyethylene terephthalate crimped yarn of the present invention is increased. It is possible to obtain elongation and predetermined crimp characteristics. As a result, when the crimped yarn is false twisted to form the final product as a false twist yarn, an excellent volume feeling and texture can be realized as the final product.

  Thereafter, the spun yarn is guided from the drawing roller (3) to the heat setting roller (4), where it is heat set. At this time, the temperature of the heat setting roller (4) is set in the range of 150 to 190 ° C. By setting to such a temperature range, moderate crystallization can be expressed as a polyethylene terephthalate fiber, and both the strength and elongation of the crimped yarn can be improved. Especially, it is preferable to set the temperature of the said heat setting roller (4) in the range of 155-185 degreeC, and 160-180 degreeC is still more suitable.

  Next, the drawn yarn subjected to the heat setting is guided to the heated fluid crimping device (5), and the crimp is imparted to the yarn by the crimping device (5) (crimping step). The heated fluid crimp imparting device (5) is a device that imparts crimp to the yarn by bringing the heated fluid into contact with the yarn, and the temperature of the heated fluid is set in a range of 185 to 235 ° C. If the temperature is lower than 185 ° C., the relaxation and shrinkage treatment of the drawn yarn is not sufficient, and the physical properties of the yarn vary, and if it exceeds 235 ° C., the single yarn may be fused.

  In the present embodiment, the heated fluid crimping device (5) includes a heated fluid ejection nozzle device that ejects a heated high-pressure fluid onto the yarn to randomly entangle the single yarn to form a three-dimensional crimp; A compression heat treatment apparatus that performs a compression heat treatment on the yarn under a heating fluid. The compression heat treatment apparatus is an annular apparatus in which metal plates are stacked and arranged at regular intervals, and the heated high-pressure fluid is sucked from the metal plates to the outside. In this compression heat treatment apparatus, the yarn is folded and stays for a certain period of time while being laminated, and heat treated.

  Examples of the heating fluid used in the heating fluid crimping device (5) include superheated steam and heated air. Among these, it is preferable to use heated air. Moreover, although the temperature of the said heating air is set to the range of 185-235 degreeC, it is preferable that it is the range of 195-225 degreeC, and it is especially preferable that it is the range of 200-220 degreeC. The temperature of the heating fluid is in the range of 185 to 235 ° C., and if appropriate conditions are selected according to the pressure, flow rate of the heating fluid, the fineness of the polyethylene terephthalate yarn to be crimped, the crimping speed, etc. Good.

  Next, the crimped yarn (6) that has been crimped by the heated fluid crimping device (5) is cooled by a cooling drum (20). In this embodiment, the crimped yarn (6) ejected on the cooling drum (20) is transferred while being cooled by suction through holes formed in the surface of the cooling drum (20). It is desirable to cool the crimped yarn (6) to a temperature lower than the glass transition temperature (Tg) (68 to 70 ° C.) of the yarn by this cooling. As a result, it is possible to produce an original polylactic acid crimped yarn to which sufficient crimp is applied so that the crimp does not loosen over time. Especially, it is preferable to cool the said crimped yarn (6) to 30-45 degreeC with a cooling drum (20).

  Thereafter, the crimped yarn is entangled by passing through the nozzle of the entanglement processing device (21). It is preferable that the entanglement process is performed by injecting high pressure air of 0.2 to 0.5 MPa from the entanglement nozzle from a direction substantially perpendicular to the traveling crimped yarn. The number of entanglements and the strength of entanglement vary depending on the performance of the entanglement nozzle, the pressure and flow rate of the high-pressure air, the fineness and tension of the running yarn, etc., so that the entanglement conditions are set and manufactured.

  Next, the crimped yarn after the entanglement process is wound around a winder (22). The winding tension at this time is preferably 0.10 cN / dtex or less. Among them, the winding tension is more preferably in the range of 0.02 to 0.07 cN / dtex, and further preferably in the range of 0.03 to 0.05 cN / dtex.

  Next, a production method for obtaining the original polyethylene terephthalate false twisted yarn (38) of the present invention by false twisting the original polyethylene terephthalate crimped yarn (6) thus obtained will be described. (See Figure 2)

  Examples of the false twisting method include pin false twist, belt false twist, and disk false twist. When the total fineness of the yarn is 500 dtex or more as in the case of the original polyethylene terephthalate false twisted yarn of the present invention, pin false twisting is preferable. In the false false twisting of the belt and the false false twisting of the disk, the false twisted portion (33), that is, the twisted body (33) has a special specification, which is not realistic.

  When false twisting the original polyethylene terephthalate crimped yarn, the temperature (HT1) of the first heater (32) is set in the range of 180 to 220 ° C., and the overfeed (40) rate until after false twisting ( OF1) is set in the range of −10% ≦ OF1 ≦ −2%, the temperature (HT2) of the second heater (36) after false twisting is set in the range of 150 to 190 ° C., and after false twisting It is preferable to produce an original polyethylene terephthalate false twisted yarn with an overfeed (50) ratio (OF2) of 10% ≦ OF2 ≦ 25%.

  Generally, the number of twists (T / m) during false twisting is preferably 500 to 1,500 T / m, and the number of twists (T / m) is set according to the crimping performance of the original polyethylene terephthalate false twisted yarn required. . In the case of pin false twisting, the number of twists (T / m) is preferably set in a range of 600 to 1,300 T / m, and a more preferable setting range is 600 to 1,200 T / m.

  The temperature (HT1) of the first heater (32) is preferably set in the range of 180 to 220 ° C. If the temperature (HT1) of the first heater (32) exceeds 220 ° C., the running condition of the false twisted yarn in the overfeed (OF2) zone (50) after false twisting becomes unstable, which is not preferable. Moreover, when the temperature (HT1) of the first heater (32) is less than 180 ° C., the false twisting temperature is low, and the effect of false twisting is not sufficiently exhibited, which is not preferable.

  The overfeed (40) rate (OF1) until after the false twisting is preferably set in a range of −10% ≦ OF1 ≦ −2%. If the overfeed (40) rate (OF1) after false twisting exceeds -10%, yarn breakage occurs until reaching the false twist, which is not preferable. Further, if the overfeed (40) ratio (OF1) after the false twisting is less than −2%, the yarn is loosened and the running state of the yarn becomes unstable, which is not preferable. The overfeed rate in the false twisting process is a value obtained by {feed speed of roller (31) −feed speed of roller (34)} / feed speed of roller (34) × 100.

  The temperature (HT2) of the second heater (36) after the false twisting is preferably set in the range of 150 to 190 ° C. If the temperature (HT2) of the second heater (36) after the false twisting is less than 150 ° C., the heat treatment temperature is low, so the hot water shrinkage (%) is high, which is not preferable. In addition, when the temperature (HT2) of the second heater (36) after the false twisting exceeds 200 ° C., the running condition of the false twisted yarn in the overfeed (OF2) zone (50) after the false twisting is It becomes unstable and is not preferable. In addition, the false twisted yarn is inferior in dry heat crimp rate (%).

  In addition, it is necessary to set the temperature (HT2) of the second heater (36) after false twisting to be lower than the temperature (HT1) of the first heater (32). The expression state of crimp by twisting can be maintained.

  The overfeed (50) rate (OF2) after the false twisting is preferably set in the range of 10% ≦ OF2 ≦ 25%. If the overfeed (50) ratio (OF2) after the false twisting exceeds 25%, the running state of the yarn becomes unstable, which is not preferable. Further, if the overfeed (50) rate (OF2) after the false twisting is less than 10%, it is not preferable because the dry heat crimp rate (%) of the obtained original polyethylene terephthalate false twisted yarn is not sufficient. . The overfeed rate in the heat treatment step is a value obtained by {feed speed of roller (35) −feed speed of roller (37)} / feed speed of roller (35) × 100.

  In addition, the original polyethylene terephthalate false twisted yarn of the present invention is not particularly limited to that manufactured by the above-exemplified manufacturing method. The original polyethylene terephthalate false twisted yarn of the present invention may be used in either a twisted or untwisted state. For example, the untwisted yarn may be mixed with other untwisted yarns in an air entangled equipment and used in the form of mixed yarn. You can also. In addition, the original polyethylene terephthalate false twisted yarn of the present invention is combined with other nylon crimped yarns, polypropylene crimped yarns, polyester-based crimped yarns and the like, and can be used as a constituent yarn of the final product. Considering environmentally friendly recycling, polyester materials such as polyethylene terephthalate, polytrimethylene terephthalate, and polylactic acid should be used as other constituent materials (other than the original polyethylene terephthalate false twisted yarn). preferable.

  In addition, two or three of the original polyethylene terephthalate false twisted yarns of the present invention are used, and after twisting and twisting (twisting number is preferably 150 to 250 times / m), hot air treatment at 120 to 150 ° C. Or it can also be set as the twisted yarn excellent in volume feeling and the texture by performing a twist set by the vacuum steam heat processing of 95-125 degreeC.

  The physical property definitions and measurement methods described in the text and examples are as follows.

<Intrinsic viscosity measurement method>
The sample was dissolved in a mixed solution of phenol / tetrachloroethane = 60/40 (mass ratio) to a concentration of 1 g / dl, and the intrinsic viscosity (IV) was measured at 20 ° C. using an Ubbelohde viscosity tube.

<Variation degree evaluation method>
After cutting the single yarn, the circumscribed circle diameter (B) and the inscribed circle diameter (A) of the single yarn were measured using an optical microscope, and the value of (B) / (A) was defined as the degree of irregularity.

<Strength measurement method>
Strength (cN) and elongation (%) were measured under the conditions of a sample length of 25 cm and a tensile speed of 30 cm / min using a tensile tester of TENSORAPID3 manufactured by USTER. The strength (cN / dtex) is a value obtained by dividing the strength (cN) by the total fineness.

<Fineness measuring method>
Measured according to JIS L 1013.

<Method of measuring dry heat crimp rate>
The polyethylene terephthalate false twisted yarn cut from the bobbin package is treated with hot air at 120 ° C. for 10 minutes under no load, and then allowed to stand for 10 minutes. This yarn is used as an original polyethylene terephthalate false twisted yarn after dry heat treatment. A sample load (Lc1) is measured after 10 seconds have passed after applying a constant load that gives a tension of total fineness dtex × 0.882 mN (90 mg / dtex) to the original polyethylene terephthalate false twisted yarn after the dry heat treatment. Next, a sample load (Lc2) was measured after 10 minutes had passed after applying a constant load that applied a tension of total fineness dtex × 0.0176 mN (1.8 mg / dtex) to the original polyethylene terephthalate false twisted yarn after the dry heat treatment. To do. The dry heat crimp rate (%) is obtained from the following formula.
Dry heat crimp rate (%) = [(Lc1-Lc2) / Lc1] × 100

The production status of the crimped yarn, the properties of the crimped yarn, the evaluation of the false twisted yarn, the evaluation of the carpet properties, and the overall evaluation were performed as follows.
<Manufacturing status of crimped yarn>
Spinning breakage: None at all ◎ None ○ Slightly △ Many ×
Single yarn breakage during stretching: None at all ◎ None ○ Slightly △ Many ×

<Characteristics of crimped yarn>
Very good ◎ Good ○ The yarn has a lot of fluff (cannot be false twisted) △

<Evaluation of false twisted yarn>
Especially good ◎ Good ○

<Carpet characteristics evaluation>
Volume feeling: Particularly good ◎ Good ○
Texture: Particularly good ◎ Good ○

<Comprehensive evaluation>
Overall evaluation of crimped yarn production status, crimped yarn characteristics, false twist evaluation, carpet characteristics evaluation, etc .:
Very good ◎ Excellent ○ Unusable ×

  Next, specific examples of the present invention will be described, but the present invention is not particularly limited to these examples.

<Examples 1-1 to 1-7, Comparative Examples 1-1 to 1-3>
As shown in Table 1 and Table 2, the polyethylene terephthalate chip was changed (the intrinsic viscosity of the polyethylene terephthalate resin produced by material recycling, the intrinsic viscosity of the polyethylene terephthalate resin produced by polymerization, and its mass ratio). An original polyethylene terephthalate crimped yarn was manufactured using a manufacturing apparatus having the structure shown.
First, from a polyethylene terephthalate resin inlet (10), a polyethylene terephthalate chip (conditions of Examples 1-2 to 1-4, polyethylene terephthalate resin manufactured by material recycling: intrinsic viscosity 0.658, polyethylene manufactured by polymerization) While adding 100 parts by mass of terephthalate resin: limiting viscosity 0.635, mass ratio: 70/30, carbon black masterbatch (75% by mass of polyethylene terephthalate produced by the polymerization, from the colorant inlet (11), (Composition of 25% by mass of carbon black) 4 parts by mass were charged and melt-kneaded at 288 ° C. while degassing in a twin screw extruder (12) with a vent (13), and then at the tip of the twin screw extruder (12). Spinning from 96 Y-section nozzles of attached spinneret (15) Extrusion was performed at a beam temperature of 292 ° C., and the spinnerets were spun together.

  Next, the spun yarn was cooled and solidified by cold air (20 ° C. 70% RH) from a cold air spraying device (16) to obtain a polyethylene terephthalate multifilament yarn comprising 288 triangular cross-section (Δ) filaments. . Next, an oil agent is applied to the yarn by an oil agent applying device (17), the yarn is focused, wound on an unheated take-up roller (1) rotating at a speed of 460 m / min, and then taken up. Preheating was performed by winding with a preheating roller (2) set to 465 m / min · 90 ° C.

  Thereafter, the spun yarn is wound around a drawing roller (3) set at a speed of 505 m / min and a temperature of 100 ° C., and a heat setting roller (4 set at a speed of 2,222 m / min and a temperature of 170 ° C. ). The draw ratio was 4.4 times.

  Next, the drawn yarn is guided to a heated fluid crimping device (5), and heated and pressurized air at 210 ° C. and 0.65 MPa is brought into contact with the yarn, and then the crimped yarn is cooled with a cooling drum. It cooled to 30 degreeC by (20). Next, the crimped yarn was subjected to an entanglement treatment of 25 pcs / m with an entanglement processing device (21), wound at a winder (22) of 1,926 m / min at a winding tension of 0.05 cN / dtex, and A worn polyethylene terephthalate crimped yarn was obtained.

  The obtained black original polyethylene terephthalate crimped yarn has a triangular cross section (Δ: profile degree 1.5) with a total fineness of 1,560 dtex / 288 filament (single yarn fineness of 5.4 dtex) and an intrinsic viscosity (IV) of 0. It had a physical property of 606, strength of 3.25 cN / dtex, elongation of 37.1%, and dry heat crimp rate of 22.6%. (Crimp yarn of Examples 1-2 to 1-4)

In Examples 1-1 and 1-5 to 1-7, the polyethylene terephthalate chips are changed as shown in Table 2 in Table 2, and crimped yarns are produced in the same manner as in Examples 1-2 to 1-4. did. The results are shown in Examples 1-1 and 1-5 to 1-7 in Table 1.

<Comparative Examples 1-1 to 1-3>
Manufactured black original polyethylene terephthalate crimped yarn in the same manner as in Example 1 except for changing the polyethylene terephthalate chip (resin manufactured by material recycling: resin manufactured by polymerization: P ratio = R / P). did. The results are shown in Comparative Examples 1-1 to 1-3 in Table 1.

Next, using the false twisting device (high-speed false twister NH-8 type ₂ pin false twist device manufactured by Nihon Spindle Manufacturing Co., Ltd.) having the structure shown in FIG. 2, the above black original polyethylene terephthalate crimped yarn (implemented) A black original polyethylene terephthalate false twisted yarn was produced from Examples 1-1 to 1-7).

When falsely twisting the above black original polyethylene terephthalate crimped yarn, the number of twists (T / m), the first heater temperature (HT1), the overfeed rate after false twisting (OF1), the false twisting The second heater temperature (HT2) and the overfeed rate (OF2) after false twisting are changed as shown in Table 1 and Table 2 (Example 1-1 to Example 1-7), and seven kinds of black originals are attached. A polyethylene terephthalate false twisted yarn was produced.

  The original polyethylene terephthalate false twisted yarn produces a crimp that is latentized by a heat setting step after tufting, usually a dry heat treatment and / or a steam treatment, to form a carpet. The evaluation results are shown in Examples 1-1 to 1-7 in Table 1 and Table 2.

<Example 2>
A black original polyethylene terephthalate crimped yarn was produced in the same manner as in Example 1 except that the nozzle had 144 holes with a Y cross section. The obtained black original polyethylene terephthalate crimped yarn has a triangular cross section (Δ: profile degree 1.3) having a total fineness of 1,226 dtex / 432 filaments (single yarn fineness of 2.8 dtex) and an intrinsic viscosity (IV) of 0. It had physical properties of 606, strength 2.99 cN / dtex, elongation 35.9%, and dry heat crimp 16.0%. The results are shown in Example 2 in Table 2.

Next, in the same manner as in Example 1, a black original polyethylene terephthalate was prepared using a false twisting device (high speed false twister NH-8 type ₂ pin false twisting device manufactured by Nippon Spindle Manufacturing Co., Ltd.) having the configuration shown in FIG. A false twisted yarn was produced. The evaluation results are shown in Example 2 in Table 2.

The original polyethylene terephthalate false twisted yarn can be made into a carpet by developing crimps latently formed by a heat setting step after tufting, usually by dry heat treatment and / or steam treatment. The evaluation results are shown in Example 2 in Table 2.

<Example 3>
A black original polyethylene terephthalate crimped yarn was produced in the same manner as in Example 1 except that the nozzle had 96 holes with a Y cross section. The obtained black original polyethylene terephthalate crimped yarn has a triangular cross section (Δ: profile degree 1.8) having a total fineness of 2,201 dtex / 192 filaments (single yarn fineness of 11.5 dtex) and an intrinsic viscosity (IV) of 0.2. It had physical properties of 606, strength 2.90 cN / dtex, elongation 34.1%, dry heat crimp rate 25.2%. The evaluation results are shown in Example 3 in Table 2.

Next, in the same manner as in Example 1, a black original polyethylene terephthalate was prepared using a false twisting device (high speed false twister NH-8 type ₂ pin false twisting device manufactured by Nippon Spindle Manufacturing Co., Ltd.) having the configuration shown in FIG. A false twisted yarn was produced. The evaluation is shown in Example 3 of Table 2.

The original polyethylene terephthalate false twisted yarn obtained in Example 3 described above exhibits crimps latent in the false twisted yarn by a heat setting step after tufting, usually dry heat treatment and / or steam treatment, and Can be a carpet. The evaluation results are shown in Example 3 in Table 2.

It is a schematic block diagram which shows an example of the manufacturing apparatus used with the manufacturing method of the original polyethylene terephthalate crimped yarn used for the false twist process of this invention. It is a schematic block diagram which shows an example of the false twisting apparatus used with the manufacturing method of the original polyethylene terephthalate false twist yarn of this invention.

Explanation of symbols

1: take-up roller 2: preheating roller 3: stretching roller 4: heat setting roller 5: heated fluid crimping device 6: crimped yarn 10: polyethylene terephthalate resin inlet 11: colorant (additive) inlet 12: Twin screw extruder 14: spinning head 16: cold air spraying device 17: oil agent applying device 20: cooling drum 21: entanglement processing device 22: winder 31: feed 32: first heater (HT1)
33: Twisted body 34: First delivery 35: Second delivery 36: Second heater (HT2) after false twisting
37: Third delivery 38: False twisted yarn 40: Overfeed zone until false twist (OF1)
50: Overfeed zone (OF2) after false twist

Claims (12)

Polyethylene terephthalate crimped yarn containing 0.01 to 3.0% by mass of a colorant and having an intrinsic viscosity of 0.580 to 0.620, with a strength of 2.65 to 3.74 cN / dtex, elongation Is obtained by false twisting a polyethylene terephthalate crimped yarn having a total fineness of 500 to 3,000 dtex, a single yarn fineness of 1.5 to 30 dtex, and a dry heat crimp rate of 10 to 30%. Made of polyethylene terephthalate false twisted yarn,
The polyethylene terephthalate false twisted yarn has a strength of 2.65 to 3.31 cN / dtex, an elongation of 25 to 35%, and a dry heat crimp rate of 30 to 50%. .   The original polyethylene terephthalate false twisted yarn according to claim 1, wherein at least one pigment selected from the group consisting of an inorganic pigment and an organic pigment is used as the colorant.   The original polyethylene terephthalate false twisted yarn is composed of a polyethylene terephthalate resin produced by material recycling and / or a resin composition with a polyethylene terephthalate resin produced by polymerization, and the mass ratio is 100/0 to 30/70. The original polyethylene terephthalate false twisted yarn according to claim 1 or 2.   The intrinsic polyethylene terephthalate false twisted yarn has an intrinsic viscosity of 0.620 to 0.670 of a polyethylene terephthalate resin produced by material recycling, and an intrinsic viscosity of a polyethylene terephthalate resin produced by polymerization of 0.610 to 0.6. The original polyethylene terephthalate false twisted yarn according to claim 1, wherein the yarn is 650.   The polyethylene terephthalate false twisted yarn according to claims 1 to 4, wherein a polyethylene terephthalate resin produced by material recycling used for the original polyethylene terephthalate false twisted yarn is produced by bottle recycling.   A carpet, wherein the original polyethylene terephthalate false twisted yarn according to any one of claims 1 to 5 is used for at least a part of a face yarn.   The carpet according to claim 6, wherein the carpet is used for dwelling. Polyethylene terephthalate crimped yarn containing 0.01 to 3.0% by mass of a colorant and having an intrinsic viscosity of 0.580 to 0.620, with a strength of 2.65 to 3.74 cN / dtex, elongation Of 30 to 45%, total fineness of 500 to 3,000 dtex, single yarn fineness of 1.5 to 30 dtex, dry heat crimp rate of 10 to 30% polyethylene terephthalate crimped yarn, overfeed rate of -10 A false twisting process in which a heat treatment is performed in a heat treatment apparatus set to 180 to 220 ° C. under the condition of −2% and false twisted;
An original polyethylene terephthalate false twisted yarn comprising a heat treatment step of heat treating the false twisted yarn with a heat treatment apparatus set at 150 to 190 ° C. under an overfeed rate of 10 to 25%. Production method.   The method for producing an original polyethylene terephthalate false twist yarn according to claim 8, wherein the false twisting device is a pin false twist device.   An original polyethylene terephthalate false twisted yarn produced by the production method according to claim 8 or 9.   A carpet, wherein the original polyethylene terephthalate false twisted yarn according to claim 10 is used for at least a part of a face yarn.   The carpet according to claim 11, wherein the carpet is used for dwelling.