JPS59187672A - Production of fiber product - 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 The present invention relates to a method for manufacturing a leather-like fiber product having raised naps made of thick and thin fibers of the same length.

Traditionally, leather-like materials were mainly formed using naps of uniform thickness.

As the denier of the constituent fibers increases, it is favorable in terms of color development, but it has the disadvantage that the nap is stiff, the surface feels rough, and the texture becomes hard.

On the other hand, in the fine denier area, the surface touch becomes more suede-like and the texture becomes more flexible, but the nap tends to become flattened and the surface appears whitish and 2, the coloring properties are significantly reduced, which is always a drawback. Ta. That is, with the conventional techniques, it has been difficult to obtain a leather-like material that is flexible, has a good touch, has excellent color development, and has an elegant appearance.

However, in order to take advantage of the advantages of thick and fine fibers, when mixing thick and fine fibers to obtain a raised fabric using conventional processing methods,
Because the fine denier fibers are inevitably cut selectively during napping, and the nap is mainly made up of thick denier fibers, the characteristics were also similar to those of thick denier fibers. In particular, the short naps of fine denier become tangled and cling to the roots of thick denier fibers, deteriorating not only the surface quality of the product but also the touch. In order to achieve high color development with polyester at the same time, we tried a conventional processing method using thick fibers made of cationic dyeable polymer, but this ultra-fine process resulted in an extreme decrease in fiber strength, which caused problems during napping. Nap breakage was more pronounced.Although color development was obtained, the surface quality was extremely degraded.

As described above, as long as conventional processing techniques are used, it has been difficult to obtain a leather-like product that has both the excellent advantages of thick denier fibers and fine denier fibers.

Thus, a solution that combines the advantages of both, while eliminating the disadvantages of both, remained undiscovered.

The present invention is the result of extensive research aimed at obtaining a leather-like material that has the advantages of thick denier fibers and fine denier fibers.

The present invention has finally been achieved.

The feature of the present invention is that by making the nap length of each thick and thin fiber the same, the characteristics of the nap of each thick and thin fiber are well-balanced.
The goal is to make the most of it.

The effect is particularly remarkable on leather-like materials such as suede and velor, and excellent effects such as unprecedented appearance, touch, overall nap strength, and therefore durability, etc., can be obtained.

Next, an example of the mixed denier composite fiber used in the present invention will be explained using a cross-sectional model.

1 to 7 show examples thereof.

These are examples for the purpose of making the explanation easier to understand, and the present invention is not limited to these examples.

Figures 1 and 2 show each denier fiber A in sea component B,
AI is surrounded by one of the fibers. A' in these figures may be a so-called polymer mutual array or a polymer blend type. A is one that is continuously arranged in the fiber axis direction.

3 to 7 show cases where a blend of AI and B is used for the sea component or the island component, and the A component is not limited to a circular shape as described above, but may have a deformed cross section. Further A
The component may be surrounded by the B component or may be exposed. Figure 7 is.

It is a composite fiber cross section consisting of thick and pongee denier only with a polymer blend, and can be achieved by using an extruder cross-wire type or pipe mixer split type.

Among the A, A', and B components shown in these figures, the A and A' components may be the same or different.

The number of each fiber of the island component is the surface touch and texture.

From the comprehensive viewpoint of surface quality and color development, the number of thick denier fibers in the composite fiber is at least 1, preferably 6 to 6.
There are 10 pieces. The number of fine denier fibers is not particularly limited, but if it is too large, chips will become tangled and the coloring effect will be reduced. On the other hand, if it is too small, the surface touch will be reduced and the flexibility will be impaired.

Therefore, it is preferable to avoid an extreme increase or decrease.

Such a composite fiber is composed of at least two components.

Adjust the pore size of the pack and spinneret appropriately for each fiber to achieve a denier mix that meets the purpose, or devise a spinning device such as changing the discharge rate (composition ratio) using a three-component spinning machine. Thermoplastic fiber-forming polymers such as Stakes polyamide can be used. Component B is generally a polystyrene compound or a copolymer thereof, various polyolefins, etc., but any combination of polyethylene terephthalate and a 5- compound may be used.

In addition, although it is usually preferable to remove component B using its solvent or decomposer, it may be selected as appropriate in consideration of industrial productivity.

The denier of the composite fiber used in the present invention is not particularly limited. It can be safely considered that the range is generally used for fabric formation. What should be noted is the denier ratio between the thick denier fibers (A) and the fine denier fibers (A') contained in the composite fiber, and the denier ratio DA/DAl must be 2 or more. Preferably 5 or more, particularly preferably 20
150 or less.

If the denier ratio is small, the color development will be reduced in the #1 denier region, and the texture 2 surface touch will be poor in the thick denier region. On the other hand, if the denier ratio is made too thick, the ultra-fine denier nap will become flat after being removed from the sea.

Only the thick denier fibers are raised, resulting in 2nd surface quality.
Touch may be degraded.

What is even more noteworthy is the process after fabric formation using the above-mentioned composite fibers. The term "fabric" as used herein refers to woven or knitted fabrics or non-woven fabrics, and the method of forming the fabric is not particularly limited as any known technique can be applied. Furthermore, the napping treatment of such fabrics refers to treatments that include physical rubbing and ironing, such as those in which the fibers are flocked by electric flocking.

This is a technique to raise the woven or knitted fabric using a technique other than slicing it and raising it. For example, there is a method of raising the fabric by using sandpaper, clothing, etc., and pressing the fabric against the fabric at a constant clearance while rotating the paper.

The processing process for textile products of the present invention does not only mean that the fabric is brushed immediately after it is formed. Depending on the purpose, it is also possible to impregnate the fabric with a binder or the like and then carry out the napping process. It is preferable to give It is still okay to dye it after it has been removed from the sea.

It is easy to understand that the fine denier fibers are selectively cut during raising, resulting in substantially uneven naps of the thick and fine fibers within the fiber bundle, making it impossible to fully exhibit the effects of the present invention.

That is, the two effects of the present invention are basically exhibited only when the composite fibers are processed in the following order: fabric formation, raising treatment, and so on. In other words, it can be said that at least the following effect elements are complexly intertwined and integrated.

Namely.

■Seabird-shaped composite fiber effect: Processing stability (ultra-fine fibers are stably obtained and fabric processing is easy.) ■Denier mixing effect: texture, touch, color development (soft wind obtained from ultra-fine fibers) ) Uniform tip length 9 Surface touch (Since the seam is removed after the napping treatment, the ultrafine fibers are not cut and the nap length can be unified.) The above effects are intricately intertwined. Thus, the unique effects of the present invention were obtained.

Next, examples related to the present invention will be shown, but the effectiveness of the present invention is as follows:
Rather than being limited or constrained by these, it is rather something that brings about the next application development.

Example 1 Two-component composite (intrinsic viscosity: 071) using a three-component spinning machine under the following conditions: B component - 2-ethylhexyl acrylate 22 wt.
% copolymerized polystyrene Drawing temperature: 80℃ 9- Fiber condition: 6 thick denier fibers, 9 fine denier fibers
The properties of the obtained bicomponent composite fiber yarn consisting of six yarns were as follows.

Composite fiber denier: 4.5a Island 1 fiber denier: 0.5d Island 2 fiber denier: 0.0063a Ken shrinkage: 15.2 peaks/In Composite fiber cut length: 51.2 mm The spinnability of the above composite fibers is very high. It was stable. Next, a web was made using the composite fibers by interlocking a cotton opening machine and a card crosslacher Mlo, and then a water jet haunch was applied to obtain a nonwoven fabric. The nonwoven fabric was raised using a needle cloth raising machine. Thereafter, the sample was immersed in trichlene and repeatedly squeezed with a mangle, and then dried in hot air at 80°C. The obtained product had a good surface quality with long naps, thick and thin fiber naps substantially uniform, and had a soft texture and a good touch. When this processed product was used as a wiping cloth, it exhibited performance similar to that of deerskin.

Example 2 Only the island component polymer was spun into polyethylene using the same spinning machine with nine nozzles as in Example 1. The properties of the yarn obtained by drawing this material were as follows.

Composite fiber denier: 4.8a Island 1 fiber denier, 06d Island 2 fiber denier: 0.01d Number of pairs: 147 threads/in Composite fiber cut length: 51.2 mm The above composite fiber was used to create a web in the same manner as in Example 1. was made and needle punched to obtain a nonwoven fabric.

Next, it was impregnated with emulsion polyurethane and dried.

This sheet was raised on both sides using a roller sander buff M/C, and then immersed in Trichlorene, squeezed with a mangle, and dried in warm air.

Next, it was dyed blue using a cationic dye using a circular dyeing machine. The product obtained was a clear blue suede-like product in which thick and thin fiber naps were substantially uniform. This product had a soft texture and a voluminous feel, and had a mixed color effect due to the denier mixture, and was a product with excellent color development.

[Brief explanation of the drawing]

FIGS. 1 to 7 are examples of schematic diagrams showing cross sections of mixed denier multi-island composite fibers used in the present invention.

Claims (1)

[Claims] (1) In a method for manufacturing a textile product in which the nap lengths of each thick pongee yarn (■) are made to be substantially the same length. stomach. It is a sea-island type composite fiber consisting of at least two components, and the '/4TJ component contains two types (A
IA') exists, and the denier ratio DA of A and A' is
A fabric is formed using a sea-island composite fiber having /DA/ of 2 or more. mouth. After that, a brushed treatment is applied. C1 Next, remove the sea component. A method for manufacturing a textile product, characterized by: