JPS61119737A - Polyamide interlaced multifilament - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a polyamide entangled multifilament,
More specifically, the present invention relates to an entangled polyamide multifilament that can be woven without glue or twist.

(Conventional technology) Fabric made of polyamide multifilament.

Due to its toughness and bright dyeability, it is used in various fields such as linings, umbrella fabrics, raincoat fabrics, jackets, and underwear. These fabrics are generally pasted and woven in a water jet loom, but recently interlaced polyamide multifilaments have been increasingly woven in a water jet loom in order to omit the pasting process. However, the polyamide multifilaments currently used for these garments are generally nylon 6 and nylon 66, and when woven in a water jet loom under intermittent tension while containing a large amount of moisture, , the threads were plasticized and stretched irregularly, resulting in defects, and the entanglement was easy to unravel, causing problems in weavability unless strong interlacement was applied. Furthermore, when the entanglement K is increased, moiré spots called interlace marks are likely to appear, and the quality of the fabric is significantly degraded. Furthermore, when nylon 6 is drawn with a normal drawing machine, it has a high hot water shrinkage rate, and the stress is different between the inner and outer layers of the thread, and its glass transition temperature is low, so it is easily heat-set in that state, and the winding has a high shrinkage rate. The difference between the inner and outer layers also increased, creating a drawback. In order to prevent this, it is necessary to perform continuous or discontinuous relaxing heat treatment after stretching to lower the hot water shrinkage rate.

(Problems to be Solved by the Invention) The present invention eliminates the drawbacks of the conventional polyamide entangled multifilament, has excellent bright dyeing properties, does not have a slimy feel, and has excellent water jet loom weavability and quality. The object of the present invention is to provide a polyamide entangled multifilament that provides an excellent fabric.

(Means for solving the problem) The present invention has the following configuration to achieve the above object. That is, the present invention provides an entangled multifilament consisting essentially of filaments of nylon 46 fibers, the entangled multifilament consisting of 10 or more filaments, the filaments being intertwined and intertwined with each other, and having a degree of entanglement. is at least 10.

The present invention will be explained in detail below.

In the present invention, it is essential to select nylon 46 fiber as the polyamide fiber. Nylon 46 fibers are used as industrial products, such as in plastic molding examples (e.g., JP-A-56-149429), and as industrial materials, in methods for manufacturing tire cord yarn (e.g., JP-A-59-88911).
), but it had not been put to practical use as a material for clothing. The present inventor conducted various studies on nylon 46 fibers, and found that compared to the previously known polyamide fibers, this fiber undergoes less plasticization in water and has good moisture absorption in fabrics.
It has been found that it is excellent for water jet loom weaving, as it has a low heat shrinkage rate and a high glass transition temperature, so it is stable at room temperature, and has the vivid dyeing properties of polyamide fibers without the characteristic slimy feeling. It was. That is, hygroscopic, for example 20°065%RH
When the moisture content is 4.0% for nylon 6, nylon 66
Benylon 46 has a much larger ratio of 6.4% compared to 4.8%, which is one of the reasons why it feels so good.

Although the reason is not clear, it does not feel slimy and has a smooth texture compared to nylon 6, nylon 66, etc. Furthermore, plasticization in water is small, such as JI
The change in fracture elongation measured by the S method (L1073) (constant speed elongation type tensile tester) between the standard state and the wet state was 42 inches dry → 53 inches for Nylon 6, while Nylon 46 was 45 inches dry → wet. 48 inches, and the sagging in wet conditions such as underwater or sweating is much smaller, and it significantly improves the sagging in wet conditions, including during water jet loom weaving, which was a problem with nylon 6 and nylon 66. .

The non-crimped nylon 46 fiber that provides these properties is
The repeating unit of the molecular chain is 70 weight coefficient or more, 6N H (CH
2) A polyamide fiber consisting essentially of poly(tetramethylene azinamide) consisting of 4N HCO(CH2)4CO, including a 'ε-capramide component, a hexamethylene adipamide component, and a hexamethylene component. Polymerized products or polymers composed of these, namely poly(ε-
It may also contain a 30-weight blend of poly(hexamethylene adipamide), poly(hexamethylene ethylene adipamide), poly(undecamethylene terephthalamide), and the like. In addition, matting agents, pigments, light stabilizers, heat stabilizers, antioxidants, antistatic agents, dyeability improvers, adhesion improvers, etc. can be added as necessary, depending on the combination. All can be used except those that have a significant adverse effect on the properties of the present invention.

Furthermore, the cross section of the filament is not particularly limited, and may be round, three-lobed, multi-lobed cross-section with four or more leaves, hollow, or a combination thereof, as required. It may also have grooves.

In addition, the number of filaments must be at least 10, but this is in order to cause enough intertwining and crossing between the filaments.If the number of filaments is small, such as less than 1, the filaments will be randomly arranged. This is because it is difficult for so-called confounding to occur. Furthermore, the fineness of the filament is preferably 10 deniers or less, more preferably 5 deniers or less. This is because in order to entangle the filaments with the fluid nozzle, the filaments must be easily twisted. However, if the filament denier is too thin, the filament will easily break during fluid treatment, so it is best to use a filament of 11'i0.5 denier or more, more preferably 1 denier or more. The yarn denier may be selected as appropriate depending on the application.

Next, the degree of entanglement (k/m) ti is determined, and nylon 6 requires at least 20 or more, and compared to this, nylon 46 has a very low degree of entanglement. The reason why sufficient weavability can be obtained even if the size is small is that
As mentioned earlier, nylon 46 is nylon 6.
Compared to conventional polyamide fibers such as polyamide fibers, plasticization in water is smaller, and the glass transition temperature is 4.
0~60'C! Since the yarn is stable at room temperature due to its high temperature of 80°C compared to This ensures good weavability. Furthermore, it becomes possible to increase the speed.

The higher the degree of entanglement, the better the weaving process can be carried out, and the better the passability in subsequent processes. However, if it is too high, the fluid flow will increase, which will increase production costs, and will also cause moiré marks, which are realized as interlaced marks, on the fabric surface. This is not desirable because it appears in The degree of entanglement seen from the interlace mark varies depending on the structure and density, but a good range is 100 or less, preferably 50 or less.

Next, the hot water shrinkage rate of multifilament is as high as 12 to 16% like ordinary nylon 6 drawn yarn, and when the glass transition temperature is low as mentioned above, the winding tension (pressure) is increased in the inner and outer layers of the wound yarn. If the threads are different, they will be fixed in that state.If there are yarns from the inner and outer layers of the thread body adjacent to each other in the fabric, defects such as streaks, skidding, and hanging will occur frequently. Generally, to avoid this, frequent processes such as continuous or separate relaxation heat treatment of the drawn multifilament to reduce the hot water shrinkage factor to 8 to 9 or less and use the inner and outer layers of the wound body separately are required. , required processing. However, in the case of nylon 46, when stretched using a normal stretching machine with a hot plate, the hot water shrinkage rate is less than 8 to 9, and the glass transition temperature is also high, so it does not need to be subjected to frequent treatments like nylon 6. Mosono”! You can use it, but
If the hot water shrinkage rate is high, the shrinkage of the fabric will be large and the surface will become dirty, so the preferred range is preferably 10% or less, more preferably 8% or less.

Note that the polyamide entangled multifilament of the present invention does not necessarily have to be one type of multifilament, as long as it consists essentially of filaments of nylon 46 fibers.
It may be a composite of materials with differences in dyeability, yield + a rate, and other physical properties.

Further, the multifilament of the present invention does not particularly need to be actively heated, but may be heated if it is drawn using a drawing/twisting machine or the like. In addition, as the oil agent, an oil that is necessary for spinning and drawing and does not cause problems such as scum and oligomers in the subsequent process may be attached as necessary, and although it is not particularly limited in the present invention, it is preferable to use an oil that provides cohesiveness. .

Here, an example of the method for manufacturing the polyamide entangled multifilament of the present invention will be explained based on the drawings.

FIGS. 1 and 2 are schematic side views of a drawing machine for producing the polyamide entangled multifilament of the present invention.

In FIG. 1, the undrawn yarn Y unstretched from the undrawn package P of nylon 46 passes through the guide 1.2, is fed to the drawing wind by the feed roller 3, and is fed to the draw roller 6.
A predetermined stretching process is carried out between the film and the film, and if necessary, the stretching point is fixed using a hot roller 4 and a hot plate 5, and heat treatment is performed. Next, the speed ratio is adjusted so that a predetermined tension is achieved between the draw roller 6 and the delivery roller 9, and the fluid nozzle 7 imparts entanglement to the pirn 1 via the kite 10.
It is wound up once. Incidentally, a heater 8 may be provided between the draw roller 6 and the delivery roller 9 to keep the tension constant and adjust the shrinkage rate of the hot water. FIG. 2 is a schematic side view of an example of the manufacturing apparatus shown in FIG. 1, with the delivery roller 9 and heater 8 removed.

Here, as the fluid nozzle, for example, the one shown in Japanese Patent Publication No. 59-33694 is suitably used;
230 etc. can also be used. Further, although both FIGS. 1 and 2 show a winding device using a ring twister, a so-called cheese winder that winds up the material into a cheese shape may also be used as appropriate.

A polyamide (nylon 46) entangled multifilament was obtained. The nylon 46 fibers were obtained using nylon 46 chips with a relative viscosity of 2.5 as raw materials at a spinning temperature of 310° C., a spinning take-off speed of 460 m, and an undrawn yarn of A Urine 7.

Comparative Examples 1-6 are intended to clarify the differences from the present invention. Here, the stretching conditions for nylon 46 are a preliminary stretching ratio of 1.0 between the feed roller 3 and the hot roller 4.
04. Stretching ratio between hot roller 4 and draw roller 6: 3.47; temperature of hot roller 4: 40°C; temperature of hot plate 5: 200°C I adjusted it so that

The nylon 6 of Comparative Example 4-6 had a preliminary stretching ratio of 1.004 and a stretching ratio of 3.28 at room temperature for both the hot roller and hot plate.

Further, using the obtained entangled multifilament, taffeta with a warp density of 104 threads/1 nch and a weft thread density of 86 threads/1 nch was woven and evaluated.

Here, the degree of entanglement is determined by hanging the upper end of the yarn cut to an appropriate length on a hook and hanging a load of 0.1 g/denier from the lower end. A needle is inserted into the thread and raised at a speed of 3 strokes per second, stopping when the load is lifted and recording the distance traveled by the needle. Obtain 100 of these values and select the larger value.

Discard 10 of each small value, find the average of 80, and set it as l.
Calculate the degree of confounding using the following formula.

Degree of entanglement (Di) -100/n Bacterial hot water shrinkage rate was determined by JIS L1073 6.12(I)A method. The entanglement property of the multifilament in water is approximately 0.2. ! ;'/denier load was applied and the material was vibrated 100 times at a rate of 100 times/min, and the retention of entanglement property was evaluated.

Fabric defects were evaluated mainly on motel. The slimy feeling was evaluated by a sensory test, and the presence was evaluated as ×, and the absence was evaluated as ○. The feel was rated as ○ for good and △ for fair.

Table 1 * The apparatus shown in Figure 1 was used, the relaxation rate between the draw roller 6 and the delivery roller 9 was set to +10%, and the temperature of the heater 8 was set to 130°C.

Examples 1 and 2 were well-received as they had good intertwining properties and fabric quality, and were dry to the touch with little sliminess.

In Example 3, the degree of entanglement was dog, and the entanglement was good, but some moire spots occurred.

1 Rule 1 Comparative Example 1 had a low degree of entanglement and had a problem with entanglement, and even with a small amount of iL weave there was a problem with weavability.

In Comparative Example 2, the degree of entanglement was satisfactory, but the feel was plastic-like.

In Comparative Example 3, the number of filaments was as small as 5, and there was a problem in the entangling ability of increasing the degree of entanglement to a predetermined level, and the quality of the fabric was also poor. Comparative Example 4.5 is nylon 6, and Comparative Example 4 has the same degree of entanglement as Example 1, but the degree of entanglement decreases in water and the entanglement property is poor. Furthermore, hanging and skidding occur during weaving, and the quality of the fabric is poor. It was something. Since Comparative Example 5 has a high degree of entanglement, it shows almost good entanglement even if the degree of entanglement decreases in water. Since stratification was not used, the savings were noticeable. On the other hand, in Comparative Example 6, the apparatus shown in FIG. Since the inner and outer layers were used separately, problems such as joints were resolved, but the texture, such as sliminess, was inferior to that of nylon 46.

(Effects of the Invention) As described above, the polyamide entangled multifilament of the present invention has excellent entangling properties, so it has no glue or twist, has excellent post-processability and weaving properties, has good fabric quality, and has a slimy feel. This has the remarkable effect of improving the properties of polyamide fibers and providing a clear hue as a polyamide fiber.

[Brief explanation of the drawing]

1 and 2 are schematic side views of an apparatus for producing entangled polyamide multifilament of the present invention, and FIG.
The delivery roller 9 is omitted in the figure. Pl...Nylon 46 unstretched package 3...
... Feed roller 5 ... Hot plate 6 ... Draw roller 7 ... Fluid nozzle 11 ... Pan

Claims (1)

[Claims] An entangled multifilament consisting essentially of filaments of nylon 46 fibers, the entangled multifilament consisting of 10 or more filaments, the filaments being intertwined or intertwined, and having an entanglement degree of at least 10.
A polyamide entangled multifilament characterized by: