JPH0637741B2 - Blown dyed cut pile carpet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a carpet in which multifilament yarns of thermoplastic synthetic fibers are used as pile yarns, and more particularly to a cut pile carpet in which a dye is sprayed on the pile surface.

[Conventional technology]

Carpets using multifilament yarns of thermoplastic synthetic fibers as pile yarns are most widely used because of their excellent productivity and durability. The pile thread has a round cross section,
Deformed cross-sections such as triangles and tri-lobals, hollow filaments with hollow sections in the cross-section, multifilament yarns with bulky properties by crimping the fibers, and twins with twin yarns It is used according to the type. For example, a pile yarn composed of a hollow cross-section fiber is used as a loop pile because it gives a soil hide effect that dirt is less noticeable due to scattering of light in the hollow portion of the fiber, but it is used as a cut pile. Not used much. There are various reasons for this, and one of the reasons is that dust and the like can enter the hollow portion of the cut pile, and once cut, it cannot be easily removed. On the other hand, pile yarns made of solid round cross-section or irregular cross-section fibers are used for loop piles and cut piles. In particular, pile yarns composed of tri-lobal cross-section fibers are widely used for various carpets because they have excellent covering properties on the pile surface, and are often used as twisted yarns such as twin yarns for cut piles such as saxony carpets. It is used.

On the other hand, regarding the dyeing of a carpet, recently, a dye is sprayed from a jet nozzle controlled by a computer to a pile surface to give a color pattern to the carpet. According to this, a carpet having a color pattern pattern like a Persian carpet can be easily obtained.

[Problems to be Solved by the Invention]

The cut pile carpet that uses twisted yarns such as twin yarns as pile yarns as described above has a tightness (pencil point property) due to the twist at the tip of the cut pile, even if the pile yarns are subjected to a heat treatment to prevent twisting. However, there is a problem in that the twist is untwisted and the pile easily becomes felt. In particular, when this cut pile carpet is dyed by the means using a jet nozzle as described above, the dye is sprayed on the pile surface at a high pressure, the tip of the cut pile is easily opened, and a high-quality carpet with a pencil point property. There is a problem saying you can't get. If this problem is solved by increasing the twisting heat treatment temperature of the pile yarn, the bulkiness of the pile yarn is reduced, the pile yarn becomes coarse and hard, and the texture of the carpet is reduced. The point property is not improved enough to withstand spray dyeing, and only low-quality carpet can be obtained.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a blow pile dyed cut pile carpet having excellent pencil point properties and high quality.

[Means for Solving the Problems]

As a result of repeated research on the production of a cut pile carpet having a pencil point property capable of withstanding spray dyeing, the present inventors have found that one or more, preferably up to about 5 hollow portions exist in the cross section. The hollow ratio, that is, the ratio of the hollow area to the cross-sectional area is 5 to 40%, preferably 10 to 30%. When a twisted yarn such as a twin yarn or a three-twisted yarn, which has a twist and is twisted by wet heat of 105 ° C or more or dry heat of 150 ° C or more, is used as a pile yarn, this pile yarn is used. We have found that the cut pile carpet does not lose the pencil point property of the cut pile even if it is dyed by spraying with a jet nozzle, has excellent durability of the pencil point property, and maintains high quality for a long time. It was

The present invention has been made based on this finding, and in a cut pile carpet in which a pile surface is dyed with a dye, the hollow ratio of the cross section is 5 to 40% due to the presence of one or more hollow parts. It is formed using multifilament yarn of plastic synthetic fiber and has at least 100 T / m or more of upper and lower twists and has a heat and humidity of 105 ° C or higher or 150 ° C or higher.
A blow-dyed cut pile carpet characterized in that a twisted yarn subjected to a twisting treatment by dry heat of ℃ or more is used as a pile yarn.

[Work]

Hereinafter, the constituent features of the present invention will be described in relation to the action.

In the present invention, the thermoplastic synthetic fibers include polyamide (nylon 6, nylon 66, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, etc.),
Fibers such as polypropylene may be mentioned, but polyamide fibers are particularly preferable for providing a pile that is soft and has excellent durability. The fibers preferably have an average denier of 5 to 25 de, especially 5 to 20 de. When the average denier is less than 5 de, when the fiber is crimped to form a pile yarn having a good covering property, the pile becomes too soft and easily becomes tired. And when the average denier exceeds 25 de, the pile becomes too stiff and the pile becomes coarse and hard,
The pile and therefore the carpet feel bad. The fibers may be uniform in denier or mixed in different denier. However, it must be a hollow fiber having a predetermined hollow portion in its cross section. The action and effect of using hollow fibers will be described later.

The use of the multifilament yarns of the fibers as described above makes it easy to provide crimps to the fibers in order to improve the covering property and feel of the pile, and to form pile yarns having excellent bulkiness. Because you can do it. And
The multifilament yarn preferably has a yarn denier in the range of 400 to 5000 de, because a pile yarn having an appropriate thickness can be obtained by twinning or twisting three strands.

The crimps applied to the fibers in order to improve the covering property and feel of the pile are as described above, in which the multifilament yarn is plasticized by the heating fluid in the nozzle and then formed into a pad or a wad. How to deposit (USP4,1
88,691 specification, 4,268,940 specification, JP-B-56-37
No. 339), a method in which a multifilament yarn is made into a loop yarn by a heating fluid in a nozzle, is discharged from the nozzle, is cooled, and is then drafted to open the fiber (USP 3,186,155, ibid.).
No. 3,543,353), a method in which a multifilament yarn is plasticized by a heating fluid in a nozzle, sprayed onto an air-permeable collision surface, and then taken out from the collision surface when cooled (USP 3,255,508 specification, BP 1,273,797). A three-dimensional random crimp provided by a high-speed processing method (such as the specification) is preferable, and the crimp ratio is preferably in the range of 4 to 15%. The three-dimensional random crimp has a great effect on improving the covering property and feeling of the pile, and the crimping rate is
If it is lower than the above range, bulky pile yarn cannot be obtained, and the covering property and feeling of the pile are deteriorated. If it is higher than the above range, the pile gives a felt feeling and the carpet of The dignity comes to deteriorate.

The crimping rate is obtained by taking out a crimped yarn of a certain length, immersing it in boiling water for 30 minutes in the free state to develop crimps, and then dehydrating it, in a standard state, that is, in an atmosphere of 20 ° C, 60% RH After air-drying for 1 day and 1 night, apply a load of 0.1 g / de to the sample to obtain the length ₁ after 1 minute, and then leave it free for 3 minutes, then 2
Apply a load of mg / de to find the length ₂ after 1 minute, and calculate 100
₍₁ - ₂₎ is a value determined by / _2.

Pile yarns are preferably crimped multifilament yarns such as those mentioned above, which are twisted at 100 T / m or more and two or three of them are twisted by twisting at 100 T / m or more. , And twisted yarn with heat of 105 ° C or higher or 1
It is made by applying twisting treatment by dry heat of 50 ℃ or more. In this case, the lower and upper twists are nylon 6 1
Taking 000de / 68fil twin yarn as an example, a lower twist of about Z150 T / m and an upper twist of about S150 T / m are required, and the preferred twist number range is Z180 to 230 T / m of lower twist and S180 to It is the lower twist of 230 T / m. If the yarn denier of the filament yarn becomes thicker, the number of twists can be reduced. However, in order to obtain a pencil point property that can withstand spray dyeing,
Both the upper and lower twists must be 100 T / m or more. Further, the heat treatment for twisting can eliminate the twisting torque and the twisting back by the treatment with the saturated steam at 127 ° C. for 1 to 2 minutes in the case of the above-mentioned twin yarn. If the yarn denier of the filament yarn is thin or the number of twists is as low as about 100 T / m, the heat treatment temperature can be lowered. However, in order to obtain a pencil point property that can withstand spray dyeing, the heat treatment temperature for twisting should be 105 ° C or higher with wet heat and dry heat.
Must be above 150 ° C. Both the upper and lower twists are 100 T / m or more, and the wet heat treatment of 105 ℃ or more or 150
If twisting torque and untwisting can be eliminated by dry heat treatment at a temperature of ℃ or more, it is possible to obtain a pencil point property that can withstand spray dyeing without increasing the heat treatment temperature for twisting. This is an effect of using the hollow fiber filament yarn, and when the solid fiber filament yarn is used, it is not possible to obtain a pencil point property that can withstand spray dyeing even if the heat treatment temperature for twisting is increased.

The pile yarn twisted by the lower twist and the upper twist of 100 T / m or more has a hollow ratio of 1 or more in the cross section, and thus the pile yarn has 5 to 5
Composed of 40% thermoplastic synthetic fiber hollow fiber, 10
The reason why the pencil point property that can withstand spray dyeing is exhibited by performing twisting treatment by wet heat of 5 ° C or more or dry heat of 150 ° C or more is considered as follows.
That is, in the hollow fiber, the hollow portion of the portion that receives the tightening pressure in the twisting is crushed by the heat treatment for twisting to stabilize the twisted form, and compared with the solid fiber, for example, a hollow fiber having a donut-shaped cross section is used. Round cross section of solid fiber with denier of second moment of area is 20%
As described above, 1.5 times and 3.0 times at 50% hollowness are less susceptible to bending deformation, etc., and are greatly related to imparting a high pencil point property. Regarding this, it can be confirmed in the cross section that the hollow portion is crushed so as to stabilize the twisted form.

If the hollow ratio is less than 5%, like the solid fiber,
The pencil point property that can withstand spray dyeing cannot be obtained, and if it exceeds 40%, the spinnability during melt spinning deteriorates, and fluff and yarn breakage frequently occur. The preferable range of the hollow portion is 10 to 30%. Further, even if the number of hollow portions is too large, the twisted form is not sufficiently stabilized due to the collapse of the hollow portions, and it becomes difficult to obtain a pile yarn having excellent pencil point properties. Therefore, it is preferable that the number of hollow portions be about 5.

The cut pile carpet can be produced by a conventionally known means such as a carpet loom or a tufting machine. From the viewpoint of productivity, it is preferable to use a tufting machine. Furthermore, in order to obtain a cut pile carpet with an appropriate pile density and excellent pile covering properties, 5/64 to 5/32
Preferably by a gauge tufting machine.

The cut pile carpet thus obtained is dyed by spraying a dye on the pile surface. For this purpose, a computer jet dyeing machine for spraying the dye from a jet nozzle driven and controlled by a computer is preferably used. Then, if a Persian carpet-like color pattern is applied with a computer jet dyeing machine, the cut pile can maintain the pencil point property, the texture is good, and the color pattern is beautiful and luxurious cut pile carpet can be obtained. it can.

〔Example〕

 The present invention will be further described below with reference to examples.

It consists of fibers with a cross-sectional shape having three hollow parts 1 as shown in FIG.
We made a nylon 6 filament yarn of / 68fil and a similar filament yarn with no hollow part, and made them.
A three-dimensional random crimp crimp yarn having a crimp ratio of 12% was obtained by passing through a heating fluid jet nozzle as shown in FIG. After making each of these crimped yarns a twist and a twist of 230 T / m, and then by using saturated steam at 130 ° C
A twisting treatment for a minute was applied to obtain a pile yarn. A cut pile carpet was produced by using each pile yarn in a 1/8 gauge tufting machine, and the obtained carpet was spray-dyed with a computer jet dyeing machine to obtain a colored carpet. Table 1 shows the results of comparative evaluation of the pencil point properties of the cut pile of this dyed carpet.

Pencil point property ⊚ is extremely good, ◯ is good, Δ is a slight fraying, but felting is not noticeable, and × is a felted portion.

As can be seen from the results in Table 1, the carpet using the filament yarn composed of fibers having a hollow ratio of 5 to 40% in the pile yarn has a good pencil point property of the cut pile after the spray dyeing, and the carpet after the fuzz test. In contrast, the carpets of Comparative Example 1 having an excessively large hollow ratio and Comparative Examples 2 and 3 having an excessively small hollow ratio have a noticeable felting effect on the cut pile after the fuzz test, or have been blow-dyed before that. At this stage, fraying may already be recognized or felting may be noticeable. In Comparative Example 1 in which a filament yarn composed of fibers having a hollowness of 45% was used as the pile yarn, it is considered that the fibers easily become fluff, which is considered to be related to the felting by the fuzz test. Fluffs were also easily generated in the yarn making.

〔The invention's effect〕

The cut pile carpet of the present invention does not lose the pencil point property even if the pile is spray-dyed, has excellent durability of the pencil point property and does not become a felt, and even when the pile is used for a long period of time, each pile has an independent high performance. It has an excellent effect of maintaining quality. It should be noted that the present invention is not limited to the example using the filament yarn composed of the cross-section fiber having a triangular outer shape.

[Brief description of drawings]

FIG. 1 is a fiber cross-sectional view showing an example of constituent fibers of filament yarn used in the present invention. 1 ... Hollow part.

Claims (1)

[Claims] 1. A cut pile carpet in which a dye is sprayed on a pile surface, and a multifilament yarn of a thermoplastic synthetic fiber having a hollowness of a cross section of 5 to 40% due to the presence of one or more hollow portions is used. A twisted yarn that has been formed and has at least 100 T / m or more of upper and lower twists and has been subjected to anti-twisting treatment by wet heat of 105 ° C or more or dry heat of 150 ° C or more is used as a pile yarn. A blow-dyed cut pile carpet characterized by being.