JPH0473229A - Multicolored bulky yarn - Google Patents

Abstract

PURPOSE:To obtain the title intermingled yarns of a special form, evident in the color difference for the constituent fibers, capable of giving in high efficiency carpets of subtle, soft color tone, by putting each specific three kinds of polyamide fibers differing in dyeability from each other to tripled bulky textured processing. CONSTITUTION:The objective yarns can be obtained by putting (A) polyamide fibers 6.9 X 10<-5> to 8.2 X 10<-5> mol/g in the amount of NH2 end group, (B) a second kind of polyamide fibers 3.8 X 10<-5> to 5.1 X 10<-5> in the amount of NH2 end group and (C) a third kind of polyamide fibers 3.5 X 10<-5> to 5 X10<-5> in the amount of SO3Na end group to doubled bulky textured processing. In the present yarns, the difference in the amount of NH$2 group between the fibers A and fibers B is >= 2.5 X 10<-5> mol/g, and (1) parts where the single fibers are mutually firmly combined and (2) bulky parts where the single fibers are bent independently are alternately arranged in a periodical manner. It is suggested that the present yarns be produced through such processes that the fibers A, B and C are tripled and the resulting yarns are put to the first tensilization, preheating, crimping, relaxation, the second tensilization and blending treatments, successively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pleochroic bulky fiber, and more particularly to a pleochroic bulky fiber made of polyamide fiber suitable for use in carpets.

[Prior Art] Conventionally known multicolored bulky fibers include, for example, Japanese Patent Publication No. 58-
It is described in Publication No. 37403.

The multicolored bulky yarn described in Japanese Patent Publication No. 58-37403 can be produced by mixing a colored bed colored with a pigment or a pigment masterbatch and a raw resin in a desired ratio, or by mixing a pigment and a raw resin powder. The bulky fibers are obtained by a convenient method such as mixing, and the heterochromatic nature of the bulky fibers is not only caused by the fact that they are colored differently, but also by the fact that they have different hues when dyed after being manufactured as bulky fibers. Differences in coloring properties include the concentration of the same type of dyed sheets, differences in the type of dyed sheets themselves, and differences in the type of polymer (for example, polypropylene). and nylon), and even the same polymers have different coloring properties depending on their fineness.

[Problems to be Solved by the Invention] When polychromatic bulky fibers are obtained from polymers or polyamides, in order to have different types of dye sheets themselves,
NH2 terminal group regulator, C0OH terminal group regulator, SO3
A Na end group introducing agent is used.

It is difficult to make the polymerization degree of the polyamide to which the above-mentioned terminal group amount adjusting agent and terminal group introducing agent are added to a high degree of polymerization, and in addition, there are problems such as being susceptible to thermal denaturation in the spinning machine. .

The present invention provides a polyamide fiber that satisfies both of the contradictory relationships between high strength, spinnability, and dyeability by increasing the degree of polymerization of the polyamide fibers, i.e., An object of the present invention is to provide a pleochroic bulky fiber made of polyamide fiber.

[Means for Solving the Problems] The structure of the present invention is that polyamide fiber A having NH2 terminal groups of 6.9X10-5 mol/g to 82X10-5 mol/g and NH2 terminal The base is 3.8
Polyamide fibers B with X10-'' mol, 7/g to 5IXIO' mol/g and SO3Na end groups of 3,5
x 10' mol/g to 5.0 x 10' mol/g, and the polyamide fiber C is bulk-processed, and the difference in NH2 terminal groups between the polyamide fiber A and the polyamide fiber B is at least 2.5 x 10 'mol/g, and the polyamide fibers A, B, and C have a bundle portion in which each single yarn forming the fiber is tightly bound in the longitudinal direction of the fiber, and each single yarn forming the fiber is independently bent. The polychromatic bulky fiber is characterized in that the bulky portions are alternately formed substantially periodically.

For example, hexamethylene diamine, benzoic acid, acetic acid, etc. are used as the adjusting agent for the amount of NH2 end groups and the amount of C0OH end groups in polyamide, and as the agent for introducing SO3Na end groups, sodium 2-sulfobaracresoxyacetate, 5
- Sulfoisophthalic acid and the like are used.

The pleochroic bulky fiber consists of three types of polyamide fibers classified as A, B, and C. Polyamide fibers A with NH2 end groups from 6.9X10' mol/g to 8.2X10" mol/g are different from other polyamide fibers B and C with NH2 end groups less than 6.9X10" mol/g. The color tone after dyeing with acid dyes is not clear, and if the NH2 terminal group exceeds 8.2X10-5 mol/g, the polymerization time to achieve a high degree of polymerization becomes long, resulting in extremely poor productivity. However, contamination of the spinneret frequently occurs during spinning, resulting in poor spinning properties and the quality of the obtained fibers cannot be maintained at a constant level.

NH2 end group is 3.8X10'mol/g to 5,1X1
Polyamide fiber B, which has a concentration of NH2 end groups of less than 3.8X10'mol/g, has a color tone after dyeing with acid dyes that is not clear and becomes close to white;
If the number of 2-terminal groups is more than 5.1×10' mol/g, the same color difference, that is, the difference in shade between polyamide fibers A and the above-mentioned polyamide fiber A will not be clear.

The other polyamide fiber C forming the pleochroic bulky fiber
The SO3Na end groups are 3.5X10-5 mol/g to 5.0X10' mol/g. SO3Na terminal group is 3
．． If it is less than 5×10 −5 mol/g, the color tone after dyeing with a basic dye will not be clear, and furthermore, the color difference after dyeing with the polyamide fibers A and B will not be clear.

If the SO3Na terminal group exceeds 5.0 x 10-'' mol/g, not only will the polymerization time in the polymerization step to achieve a high degree of polymerization become long, but also the dispersion of titanium oxide added to the polyamide fiber as a fader will be difficult. The titanium oxide is prevented from being spun by the filter in the foreign matter filtration zone of the spinning process, causing titanium oxide dispersion unevenness in the spun polyamide fibers and clogging of the filter. The internal pressure increases extremely.Therefore, it is necessary to frequently replace the filter in the foreign matter r retreat zone of the spinning process, which is undesirable from both quality and productivity points of view.The above-mentioned polyamide fibers A, B and C
are individually spun, drawn, and then aligned and combined. The spun polyamide fibers are subjected to a first tensioning treatment at a stretch rate in the range of 2 to 12% at which stretching is not substantially performed in the first tensioning region.

If the stretch rate in the first tensioning area is less than 2%, the heat treatment with the preheating roller described later will be weak, and it will be difficult to crimp during the crimping process in the fluid treatment area, and the Also, crimp spots in the length direction tend to occur, which is undesirable.

On the other hand, the stretch rate in the first tension application region is 1
When it exceeds 2%, the polyamide fibers are stretched, and this stretching tends to cause quality variations in the length direction of the polyamide fibers.

The polyamide fiber that has been subjected to the first tensioning treatment is then wound around a preheating roller heated to 150 to 200°C to undergo a preheating treatment. By performing the preheating treatment, it becomes possible to crimp the polyamide fibers in the next step extremely uniformly.

When performing preheating treatment, the surface temperature of the roller should be set to 15%.
Adjust to a range of 0 to 200°C. When the surface temperature of the roller is lower than 150°C, sagging or loops are less likely to occur in 1 ml of polyamide cod when crimping is applied in the next step;
If the temperature is higher than 00°C, the single yarns may fuse together when crimping is applied in the next step, and if this fused portion occurs, the physical properties of the polyamide fiber in the length direction will be extremely non-uniform. Become.

The preheated polyamide is subsequently led to a fluid treatment zone and crimped using steam at a temperature of 200 DEG to 260 DEG C. to form slacks and loops.

The pressure of the steam used in this fluid treatment area is selected depending on the shape of the nozzle used for fluid treatment, but it is 5 to 9 k
g/cm2 is preferably used.

When the temperature of the steam in the fluid treatment zone is lower than 200°C, it is difficult to fix the slack and loops formed in the polyamide fibers, and when tension is applied by the second tension applying device in the subsequent process, the slack and loops are difficult to fix. Loops may disappear and good bulky fibers may not be obtained. Furthermore, if the temperature of the steam in the fluid treatment area exceeds 260°C, some of the single filaments forming the polyamide fibers may fuse to other single filaments or disturb the molecular orientation of the single filaments. This may prevent the quality in the direction from becoming extremely uniform.

The crimps are applied in the fluid treatment zone, and the obtained bulky fibers are subsequently led to an overfeed zone having an overfeed ratio of 40 to 100%, where they are cooled and the crimps are fixed. In this case, a suction perforated drum is usually used.

The bulky fibers that have been subjected to the relaxation treatment in the above-mentioned Olverfeed zone are subsequently guided to the second tensioning zone, where they are subjected to a second tensioning treatment with a stretch rate of 10 to 50%. By setting the stretch rate to 10 to 50%, the loops and slacks of the bulky fibers formed in the fluid treatment zone and the overfeed zone are aligned. When the stretch rate is less than 10%, the loops and slacks of the bulky fibers in the length direction of the polyamide fibers are not aligned, resulting in uneven loops. Furthermore, when the stretch rate exceeds 50%, the loops and slacks formed in the fluid treatment area and the overfeed area are fully stretched, resulting in a decrease in bulkiness6. The aligned bulky fibers are subsequently guided to an air entanglement treatment zone.

In the air entangling treatment area, the overfeed rate is set in a range of 1 to 5%, and the air entangling treatment is carried out by supplying air to the air entangling nozzle. Although the air pressure varies depending on the shape of the air entangling nozzle, 5 to 9 kg/cm"' is preferably used.

By setting the overfeed rate to 1 to 5%, the individual filaments forming the bulky fibers are intermixed and tightly bound bundles are alternately formed approximately periodically. If the overfeed rate is less than 1%, the opening of the yarn in the air entangling nozzle may be poor, the single yarns may not be mixed well, and the entangling may occur. On the other hand, when the overfeed rate exceeds 5%, new slack occurs, and this slack tends to become a single yarn that is free and not mixed with other single yarns.

As described above, the method for producing the multicolored bulky fiber according to the present invention is to provide a first tensioning treatment, a preheating treatment, and a crimping treatment to a plurality of types of spun and drawn synthetic fibers having different dyeability. , a relaxation treatment, a second tensioning treatment, the introduction of conductive fibers, and a fiber blending treatment are each performed successively under special conditions, resulting in a synergistic effect, resulting in a polyamide fiber made of multiple types of polyamide fibers with different dyeability. The bulky fibers are intermixed with individual single yarns to obtain intermingled yarns which are extremely homogeneous in the length direction and are preferably used as fibers for carpets.

The polychromatic bulky fiber according to the present invention is a polyamide fiber with NH
2 terminal groups from 6.9x10-5 mol/g to 8.2xlO
'mol,/g, and the NH2 terminal group of polyamide fiber B is 3.8X10'mol/g to 5,1X10'mol/g.
and the SO3Na terminal group of polyamide fiber C is 3.5
x10-5 mol/g to 5.0 x 10' mol/g, and the polyamide fibers A, B, and C were combined to make them bulky, and the obtained bulky fibers were woven into a dyed carpet. The color difference between each polyamide fiber, that is, the same color difference between polyamide fibers A and B, polyamide fiber A,
The different color difference between B and polyamide fiber C is clear, and the intertwining of the individual filaments of the fibers with different color differences creates a subtle soft color tone.

In addition, the three types of polyamide fibers forming the intermingle, which is the multicolored bulky fiber according to the present invention, have good spinability;
The obtained fibers are also homogeneous and have excellent quality and productivity.

[Effect of the invention] The multicolored bulky m-fiber according to the present invention is an intermingle, and the bulky fiber made of three types of polyamide fibers that are interwoven has a clear color difference between the polyamide fibers, and the color difference is Each single thread of the fibers is intertwined, and when woven into a carpet, no vertical streaks occur and it has a subtle soft color tone.

In addition, the polychromatic bulky fibers according to the present invention have many advantages, such as being homogeneous with few troubles in the spinning process, and eliminating the need to cut bulky fibers in the process of weaving cavettes, making it possible to efficiently obtain carpets. has.

Claims (1)

[Claims] In the pleochroic bulky fiber, the NH_2 terminal group is 6.9×
10^-^5 mol/g to 8.2 x 10^-^5 mol/
Polyamide fiber A with g and NH_2 terminal group is 3.8
Polyamide fiber B with ×10^-^5 mol/g to 5.1 × 10^-^5 mol/g and SO_3Na terminal group of 3.5 × 10^-^5 mol/g to 5.0 × 10^-^
5 mol/g of polyamide fiber C has been subjected to bulking processing, and the difference in NH_2 end groups between polyamide fiber A and polyamide fiber B is at least 2.5 x 10^-^.
5 mol/g, and the polyamide fibers A, B and C
In the fiber length direction, a bundled part in which the individual filaments forming the fiber are tightly conjugated and a bulky part in which each filament forming the fiber is independently bent are formed approximately periodically and alternately. A pleochroic bulky fiber characterized by: