JPS6113012B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nylon crimped yarn that has excellent stain resistance and bulkiness.

For details, please refer to the conventionally known British Patent No.
Nylon described in Japanese Patent No. 1292388, in which hollow holes are formed in the length direction of the fibers and the cross-sectional shape of the fibers is approximately square, has improved stain resistance and bulk properties, and is more suitable for carpet applications. This relates to crimped yarn.

The object of the present invention is to obtain the previously known British patent no.
In the fiber described in Publication No. 1292388, it is easy to impart an asymmetric structural difference in the cross-sectional direction of the fiber,
It is an object of the present invention to provide a high-grade stain-resistant nylon crimped yarn that has a great crimp effect through various processing treatments and is further improved in stain-proofing properties and bulkiness.

The structure of the present invention is that in the stain-resistant nylon crimped yarn, the shape of the single yarn constituting the crimped yarn has four hollow holes and a substantially square cross section, and the cross-sectional area of the single yarn is The proportion of the sum of the cross-sectional areas of the four hollow holes is 4 to 15%, and the degree of cross-sectional deformation (diameter of circumscribed circle/diameter of inscribed circle) Cr is within the range of 1.03<Cr<1.35. The fineness (denier) of each single yarn d
is 8≦d≦80, and the total fineness (denier) D of the crimped yarn constituted by each of these single yarns is 500≦D≦3600. It is in.

The present invention will be described in detail below.

FIG. 1 is an example of a schematic plan view of a spinning hole used when the stain-resistant crimped nylon yarn according to the present invention is melt-spun. Figure 2 shows that nylon is melt-spun from the spinning hole shown in Figure 1, and then
9 is a cross-sectional view of a yarn obtained through one or more of the steps shown in FIG. 9. Figures 3 and 4
6 to 9 are schematic front views showing the process of treating the yarn spun from the spinning hole shown in FIG. 1. FIG. 5 is a schematic partial vertical cross-sectional front view showing the process of treating the yarn spun from the spinning hole shown in FIG. 1. The same symbols in each figure are used in common.

The stain-resistant crimped nylon yarn according to the present invention can be obtained by the apparatus shown in each of the figures above. A detailed description of each device will be given later.

A nylon pellet is melted and discharged from a spinning hole K as shown in FIG. 1, and a polymer part P and a hollow hole A surrounded by the polymer part P as shown in FIG. The yarn formed in the length direction is crimped in a crimping process, and the shape of the single yarn of the obtained crimped yarn has four hollow holes A, and the cross section is approximately quadrangular. The ratio of the sum of the cross-sectional areas of the four hollow holes A to the cross-sectional area of the yarn is 4 to 15%, and the ratio of the sum of the cross-sectional areas of the four hollow holes A to the cross-sectional area of the single yarn is 4%. If it is less than 15%, the ability to hide the resist dyeing substance peculiar to hollow fibers (Soil-Hide effect) is poor and the antifouling performance is low, and if it exceeds 15%, the melt spinning and drawing of the yarn Y will be poor. , single thread breakage is likely to occur in each process such as crimping, and the spinning properties are poor, but it is difficult to make the quality of the obtained yarn Y high. Furthermore, in the cross-sectional shape of a single yarn, if the ratio Cr of the diameter of the inscribed circle N to the diameter of the circumscribed circle G of the cross section is 1.03 or less, an asymmetric structural difference occurs during crimping, that is, due to cooling or heating on one side of the single yarn. The resulting yarn Y has poor bulkiness and is difficult to provide a desirable texture. In addition, in the cross-sectional shape of a single yarn, if the ratio Cr of the diameter of the inscribed circle N to the diameter of the circumscribed circle G of the cross section is 1.35 or more, the shape of the single yarn will not be approximately square, and a depression will be formed on the surface. This has the drawback that dust tends to adhere to the surface of the surface of the surface of the surface, and once the dust has adhered, it is difficult to remove it, resulting in a significant decrease in antifouling performance.

Fineness (denier) of each single yarn composing the crimped yarn d
If the crimped yarn is less than 8d, carpets, etc. woven using the crimped yarn made of the single yarn will have poor compression performance, resulting in carpets, etc. that lack what is commonly referred to as "stiffness", resulting in the disadvantage that the product will not be of high quality. . In addition, the fineness (denier) d of each single yarn constituting the crimped yarn is
If it exceeds 80 d, the yarn made of the single yarn will require special large equipment for cooling during melt spinning and heating on one side during crimping, and the resulting yarn will also be hard and difficult to use for carpets, etc. Often unsuitable. If the total fineness (denier) D of the crimped yarn composed of each of the above-mentioned single yarns is less than 500D, the mechanical properties of the carpet obtained by weaving the crimped yarn into a carpet will be poor.
The yarn requires processing such as twisting, and if the yarn exceeds 3600D, the number of single yarns to be spun becomes enormous, resulting in variations among single yarns during spinning and processing, making it difficult to obtain high-quality crimped yarns. It has the following drawback.
Therefore, especially when used as a carpet
The range of 500≦D≦3600 is desirable.

The manufacturing process of the antifouling nylon crimped yarn according to the present invention will be described in detail. FIG. 3 shows the melt-spinning process, in which the yarn Y is cooled on one side by a cooling chimney 2 from a spinning tower 1 equipped with a spinneret having a spinning hole K shown in FIG. After being oiled and wound around Nelson roller 4, it is wound onto bobbin 6 by winding device 5. One-sided cooling of the yarn in the cooling chimney 2 is performed under conditions that uniformly cool the entire yarn or give asymmetric structural differences to each single yarn of the yarn Y.

The oil supply device 3 supplies oil to the yarn Y.
A water-containing or non-water-containing oil agent is applied at a ratio of 1.0 to 4.0% by weight based on the weight of the product.

The yarn Y wound around the Nelson roller 4 is further wound around another Nelson roller (not shown), and may be stretched between the respective Nelson rollers during spinning and winding.

As shown in FIG. 4, when the yarn Y is drawn, it is drawn between Nelson rollers 7 and 8. In this case, it is preferable that an asymmetric processing device 9 for heating or cooling the yarn Y from one side be provided between the Nelson rollers 7 and 8. In particular, when the yarn Y immediately after spinning shown in FIG. Structural differences are given.
If the surface of the asymmetrical processing device 9 that is in contact with the yarn Y is subjected to a satin finish, the processing effect can be further improved. Further, it is preferable that the Nelson roller 8 is heated to thermally fix the asymmetric structure difference of the asymmetrically treated yarn Y. The yarn Y sent out from the Nelson roller 8 is continuously guided to a crimping process where it is crimped, or it is once wound onto a bobbin and then transferred to a crimping process where it is crimped. processed. FIG. 5 to FIG. 9 show the crimping processing process. FIG.
A stuffing box 13 is provided between the supply roller 11 and the take-out roller 12, and the pressure inside the stuffing box 13 is kept constant by using a speed difference between the supply roller 11 and the take-out roller 12 and a flapper. By uniformly buckling and fixing the yarn Y, a bulky processed yarn can be obtained.

In the apparatus shown in FIG. 6, a yarn Y is sent out by a Nelson roller 10, and the yarn Y is crimped by a fluid treatment nozzle 14. The fluid treatment nozzle 14 is supplied with compressed air, compressed heated air, saturated steam, superheated steam, or other heated inert gas in the direction of arrow b. The seventh apparatus is a device in which the yarn Y is crimped using the fluid treatment nozzle 14.
It is shown in FIGS. FIG. 7 shows the fluid treatment nozzle 14
A laminar or turbulent flow fluid is supplied to cause the yarn Y to develop crimps, and then the yarn Y is passed through a heating zone 15 and heat-set. Figure 8 shows the above-mentioned 6th and 7th
An air-permeable collision wall 16 is provided directly below the fluid treatment nozzle 14 shown in the figure, and the air-permeable collision wall 16 separates the fluid and yarn Y that merge. Similarly, as a device for separating the fluid and the yarn Y, there is a device that rotates the breathable collision wall 16 in the direction of arrow a like a conveyor as shown in FIG. 9, and a drum-like device (not shown). ) can be used.

Example A nylon 6 polymer with an intrinsic viscosity of 1.25 was melted at 260°C, passed through a spinneret having 70 spinning holes shown in Fig.
I picked it up in minutes. During the spinning, cold air was blown at a speed of 50 m/min from one side to give an asymmetrical structural difference, thereby obtaining a latent crimped yarn of 1500 denier and 70 single yarns. The wind speed distribution of the cooling chimney that blows cold air was designed to prevent yarn breakage due to yarn fluctuation.

Next, the latent crimped yarn was crimped using the processing device shown in FIG. The yarn was wound around a supply roller heated to 125° C. and introduced into a fluid treatment nozzle and a heating cylinder at a supply speed of 500 m/min for bulking treatment. Air pressure 5 for fluid treatment nozzle
Kg/cm ² of heated air was introduced, and the heating cylinder was heated to 200°C using an electric heater. The crimped yarn exiting the heating tube is wound around a pull-out roller at a speed of 300 m/min, and subjected to stretching treatment to disrupt the crimp phase and to make it latent appropriately, and entangling treatment to improve yarn convergence. After it got old, I rolled it up.

The obtained yarn has a strength of 1.5 g/d, an elongation of 68%, a boiling water shrinkage rate of 6.5%, a number of crimps of 14/inch, and a hollow pore volume ratio of 8%, and has excellent stain resistance and bulkiness. It was hot.

According to the present invention, conventionally known methods such as British Patent No.
Characteristics of the stain-proof nylon crimped yarn with hollow holes formed in the length direction described in Publication No. 1292388, namely, stain-proof property and bulkiness, as well as texture especially for carpet use, moderate "waistiness", and moderate It is a stain-resistant crimped nylon yarn with improved hardness (which is difficult to express numerically), and has excellent performance for use in areas that are stepped on with shoes on, as well as carpets in living rooms.

The polymer used may be any nylon-based polymer, but it is particularly preferable to use nylon 6 because it satisfies the constituent requirements of the present invention because the above-mentioned performance will be even better.

[Brief explanation of the drawing]

FIG. 1 is an example of a schematic plan view of a spinning hole used when the stain-resistant crimped nylon yarn according to the present invention is melt-spun. Figure 2 shows that nylon is melt-spun from the spinning hole shown in Figure 1, and then
9 is a cross-sectional view of a yarn obtained through one or more of the steps shown in FIG. 9. Figures 3 and 4
6 to 9 are schematic front views showing the process of treating the yarn spun out from the spinning hole shown in FIG. 1. FIG. 5 is a schematic partial vertical cross-sectional front view showing the process of treating the yarn spun from the spinning hole shown in FIG. 1. 1...Spinning tower, 2...Cooling chimney, 3
... Oil supply device, 4, 7, 8, 10 ... Nelson roller, 5 ... Winding device, 6 ... Bobbin, 9 ... Asymmetric processing device, 11 ... Supply roller, 12 ... Take-out roller, 13 ... ...Stuffing Box, 1
4...Fluid processing nozzle, 15...Heating zone, 1
6... Breathable collision wall, K... Spinning hole, P... Polymer part, A... Hollow hole, Y... Yarn, G... Circumscribed circle, N... Inscribed circle.

Claims (1)

[Scope of Claims] 1. In an antifouling nylon crimped yarn, the shape of the single yarn constituting the crimped yarn has four hollow holes and a substantially rectangular cross section, and the cross-sectional area of the single yarn is The proportion of the sum of the cross-sectional areas of the four hollow holes in the total area is 4 to 15%, and the degree of cross-sectional deformation (diameter of circumscribed circle/diameter of inscribed circle) Cr is within the range of 1.03<Cr<1.35. The fineness (denier) of each single yarn d
is 8≦d≦80, and the total fineness (denier) D of the crimped yarn constituted by each of these single yarns is 500≦D≦3600. .