JPS5943579B2 - Processing method for raised products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing napped products, ie textile products having napped hair.

Products with raised piles, such as cut pile or loop pile, have unique and diverse appearances and textures and are widely used.

Various processing methods have been carried out and proposed to improve its appearance, feel, etc.

One purpose of producing these raised products is to obtain a fur-like product.

However, as is well known, natural fur has extremely complex, subtle, and sophisticated colors and shapes, and it has been almost impossible to produce it artificially.

For example, many natural furs have precise raised hairs with different colors at the base, center, and tip, but it has been extremely difficult to create such things artificially.
In reality, it is almost never done.

Similarly, in natural fur, the thickness of the erect hairs differs at the root, center, and tip.

Although quite a number of methods have been proposed for producing fur-like products having such raised fluff, it is no exaggeration to say that there is still no method with sufficient precision and practicality.

Therefore, most of the fur-like products obtained by conventional methods do not have the complex, high-grade hue and shape of natural fur in their raised hair, and are no more than low-grade imitations.

The first object of the present invention is to propose a new method for producing a raised product having a complex, high degree of hue and morphology comparable to natural fur.

A second object of the present invention is to propose a new method for manufacturing nap-raised products with a high degree of design and texture.

That is, the present invention proposes a method that can dye or bleach by changing the hue and density in the length direction of the napped hair, and furthermore, can change the thickness of the fibers in the length direction of the napped hair.

Conventionally, in order to give different hues along the length of the nape, a method has been used to apply a dye or bleaching agent to the surface (the tip of the nape), but this method is not accurate enough; Moreover, it is difficult to obtain complex hues.

One of the biggest challenges when processing piles to change their color or thickness along their length is to maintain the pile in an upright state and to perform some kind of processing on it with high precision. be.

As a result of intensive research on this point, the present inventors have found that the fluff is maintained in an upright state by centrifugal force, and the liquid level of the processing solution (for example, staining solution, decolorization solution, solvent, decomposer solution, etc.) ( It was discovered that by controlling the contact between the liquid surface (interface) and the standing piloe, it was possible to freely change the coloration and thickness of the standing piloe, and published JP-A-56-1548.
I proposed this in issue 6.

As a result of further research, the present inventors discovered a different and superior method and completed the present invention.

The method of the present invention is characterized in that a fiber structure having raised naps is attached to a holder and rotated, and the raised naps caused by the centrifugal force are brought into contact with a fiber treatment liquid running in a space.

In the present invention, raised hair refers to cut pile, loop pile, raised hair, and any other raised hair obtained by a hair piling method, a flocking method, a sliver curling method, a raising method, or the like.

Fibrous structures include knitted fabrics, woven fabrics, nonwoven fabric sheets, and similar items.

FIGS. 10 to 14 are explanatory diagrams showing examples of fur or napped products obtained by the present invention.

The fur of many animals consists of thick, long prickly hairs 4a and thin, short fluffs 4b.

In most cases, stinging hairs are thin and pointed at the tips, thick at the center, and thin at the base.

3 is a leather part in natural products, but in artificial products it is composed of knitted fabrics, woven fabrics, non-woven fabrics, and similar products thereof, and is called a base fabric.

The base fabric 3 often contains, for example, a polyurethane elastic body, rubber-based, or inelastic-based resin, but may not contain it in some cases.

Figures 10 to 13 show examples of a double structure in which the raised fluff consists of two types of fluff 4a and fluff 4b, and Figure 14 shows an example of a structure in which the raised fluff 4 consists of only one type.

Figure 10 shows an example in which the tip of the raised hair is dyed in a dark color and the root in a light color, Figure 11 shows an example in which the tip is light colored and the root is dark colored, and Figures 12 and 13 show an example in which the tip and root are blurred, respectively. This is a colored example.

FIG. 14 is an example in which the length and coloring state of the raised hairs change in a wavy manner.

Of course, the above-mentioned dark colors and light colors are just one example, and it is obvious that an infinite number of color schemes can be obtained by combining two colors that have mutually different brightnesses and/or hues.

The present invention makes it possible to perform these colorings arbitrarily and with high precision.

Needless to say, although the present invention is suitable for manufacturing structures such as those shown in FIGS. 10 to 14, it is not limited to the structures shown in these figures.

That is, the present invention is not limited to those consisting of two types of raised fluff, fluff and stinging hair, but also applies to, for example, those consisting of only one type of raised fluff, or those consisting of three or more types of raised fluff.

Similarly, the present invention can be applied to the production of products in which the thickness of the nap changes along the length, but it can also be applied to the production of products in which the thickness does not change, but only the color.

It is also possible to cut the standing hair into uniform lengths (shearing).
Alternatively, it is also possible to partially swell the nape or cause the latent crimp yarn to develop crimp.

The piloerection applies equally whether it is crimped or not.

FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention.

In FIG. 1, a rotating body 2 rotates around a central axis 1. In FIG.

A nap product consisting of a base fabric 3 and a nap 4 is attached to the turning body 2, and the nap 4 stands up outward due to centrifugal force caused by rotation.

On the other hand, the treatment liquid 6 is discharged from the discharge section 5, travels through the space 10, comes into contact with the nap 4, and is then collected in the tank 7.

The processing liquid in the tank 7 is supplied to the discharge section 5 by a pump 8.

9 is...Using (storage body).

The speed of the processing liquid 6 discharged from the discharge part 5 and traveling in the space 10 may be a natural falling speed due to gravity, or it may be set at a high speed by applying high pressure with the pump 8 and spraying it from a nozzle.

For example, by setting the rotational speed (peripheral speed) of the nap and the speed of the running processing liquid to be the same (g), the contact between the nap and the processing liquid can be made extremely smoothly.

For example, when a cylinder with a diameter of 1 m is rotated 10 times per second, the circumferential velocity is 31.4 m/sec and the centrifugal acceleration is approximately 200 G (200 times the acceleration of gravity).

It is relatively easy to set the traveling speed of the treatment liquid 60 to about 30 m/sec.

The space 10 may be filled with a gas such as air, water vapor, nitrogen, etc. at atmospheric pressure or in a pressurized state, and the pressure may be reduced.

FIG. 2 is a longitudinal sectional view taken in the direction of the arrow on the XX plane of FIG. 1, and is an explanatory diagram showing the state of contact between the nap 4 and the processing liquid 6.

The contact state between the nap 4 and the treatment liquid 6 is adjusted by changing the distance between the liquid level and the base fabric.

FIG. 10 shows an example of a product obtained by dyeing the tip while keeping this distance constant, and FIG. 11 shows an example of a product obtained by similarly decolorizing the tip.

Similarly, by dyeing or decoloring while gradually changing the distance, products with blurred colors as shown in FIGS. 12 and 13 can be obtained.

It is also clear that by using a napping solvent or decomposing agent as the treatment liquid 6, the tips of the napping can be gradually thinned or cut.

FIG. 3 shows another embodiment of the shape of the traveling processing liquid 6, in which the liquid surface is wavy.

By this method, a product can be obtained in which the length of the nap, the thinning of the tip, or the color changes in a wavy manner.

4 and 5 show examples of a plurality of trickles (shower-like) in which the traveling processing liquid 6 is ejected from a plurality of nozzles.

FIG. 4 shows an example in which a plurality of rivulets 6 are arranged in a straight line, and in order to obtain a uniform product, the rivulet group 6 can be processed while being moved left and right as shown by the arrows.

FIG. 5 shows an example in which the trickle group 6 is arranged on a curved line, and it is possible to obtain a product having a more complex color and shape, for example, as shown in FIG. 14.

FIGS. 6 and 7 are cross-sectional views showing another example of the arrangement of the traveling processing liquid 6. FIG.

FIG. 6 shows an example of a large number of intermittent and complicatedly arranged small streams, and FIG. 7 shows an example of a plurality of intermittent band-shaped flows discharged from a slit-shaped discharge hole.

FIG. 8 shows an example in which the base fabric 3 is attached to the rotary body 2 having wavy irregularities, so that the nap is held in an uneven shape and brought into contact with the processing liquid 6. In this method, the product shown in FIG. 14 can be produced. You can get it.

In this way, it is possible to adjust the distance between the traveling treatment liquid 6 and the base fabric 3, change the shape of the flow of the treatment liquid 6 and its arrangement, and use dyeing liquid, decolorizing liquid, decomposing or dissolving agent, etc. It will be clear that combinations result in an infinite variety of products.

FIG. 9 shows an example in which the discharge portions 5 for the processing liquid 6 are provided at a plurality of locations.

With this method, if a single processing solution is used, the processing speed is the first.
It will be 4 times as much as the method shown in the figure.

Further, by using a plurality of processing liquids and ejecting them from separate discharge portions, more complicated processing can be performed simultaneously or successively.

As a method for changing the thickness of the raised fluff, a solvent or a decomposer solution can be used as the treatment liquid.

It is desirable that the solvent be one that gradually dissolves the fibers from the surface without causing them to swell too much.

As a decomposition agent, for example, for polyester fibers,
Strong alkali aqueous solutions such as caustic soda are well known, and in this case, the fibers are gradually decomposed and removed from the surface as if being polished, without causing any swelling.
Particularly suitable.

For example, polyester fibers (polyethylene terephthalate, polybutylene terephthalate, polyethylene oxybenzoate, copolymers and mixtures thereof, etc.) are used for the napping, and the treatment liquid is heated to 60 to 30°C, preferably 60 to 100°C. Caustic soda aqueous solution (1 to 3
(0%, preferably 1 to 10%), the tip of the raised nape can be thinned or cut as desired.

As mentioned above, the present invention is applicable to all types of pile products, including dyeing, bleaching, cutting (splitting), changing the thickness of the pile, swelling, dissolving, decomposing, adsorbing, shrinking, curling, and heat treatment. It can be applied to various other processing.

The centrifugal force applied to the present invention must be sufficient to remove the processing liquid that has entered unnecessarily during the raising of the floes (S<S); In this case, it is more than 5 times (5G), but it is even more
G) or more, particularly preferably 30 times (30G) or more.

The greater the acceleration due to centrifugal force (especially over 100G)
It is preferable because the pile has good uprightness, but on the other hand, from the viewpoint of mechanical strength, it is often limited to about 100OOG or less in practice.

For example, if the radius is 1m and the rotation is 1 second, the centrifugal force is approximately 2G.
However, the ability of the pile to stand up and the ability to remove the treatment liquid is rather weak.

At 10 rotations per second, the centrifugal acceleration is approximately 200G, which is sufficient.

The direction of the rotation axis 1 may be horizontal, vertical, or have any other angle.

Of course, it is also possible to include a heating or cooling device and a temperature detection device for controlling the temperature of the processing liquid.

The contact state between the nap and the treatment liquid may be adjusted as desired depending on the purpose.

It is also easy to change the contact state over time.

For example, the contact state (depth) between the treatment liquid and the pile can be changed sinusoidally, linearly or quadratically over time, or according to any other function (program control). ) can be done.

It is also easy to control multiple flows separately and independently.

The running speed of the nap may be the same as or different from the running speed of the treatment liquid.

The running direction may be the same or may be the opposite direction.

It is preferable to use them in the same direction and at similar speeds because the contact condition is smooth and a highly uniform and highly controlled product can be obtained.

However, by using a large speed difference or the opposite direction, it is possible to obtain a product in which the coloring, length, thickness, uprightness, crimpability, etc. of the raised naps are complicatedly disordered, and this is also an excellent method. It is.

All kinds of fibers such as natural fibers, chemical fibers, and synthetic fibers can be used as the fibers that make up the nap.

The fibers constituting the nap can be one type or a mixture of two or more types.

For example, raised products made of two or more types of fibers with different thicknesses, cross-sectional shapes, dyeability, decolorization, degradability, solubility, shrinkability, crimpability, latent crimpability, self-splitting properties, etc. By applying the present invention to jacquard knitted fabrics, it is possible to produce fabrics with more complex colors, appearances, and textures.

In the method of the present invention, the interface of the treatment liquid can be controlled with high precision according to necessity, and different treatments can be precisely performed depending on the raised portion.

On the other hand, conventional methods such as Japanese Patent Publication No. 48-4910
As shown in Figure 1 of the publication, in a method in which a container is filled with a processing liquid and the naps are allowed to hang down from above (by gravity) and the tips are immersed in the process, the processing solution is absorbed between the naps due to capillary action. There are serious drawbacks such as irregular treatment and contamination of unintended areas that should not be treated.

In the method of the present invention, such infiltration of the treatment liquid into unnecessary portions due to capillarity can be prevented by using a sufficient centrifugal force, for example, 10 G or more, particularly 30 G or more.

Furthermore, in general, the nap is often crimped or loosely curled due to the manufacturing process up to that point (and it is difficult to make it stand up evenly).

Therefore, with the conventional method, it is difficult to uniformly treat the piloerection, but the present invention uses centrifugal force to make the piloe stand up with a force tens or even hundreds of times stronger than gravity, if necessary. As a result, the uniformity of processing is dramatically improved.

As is clear from the above description, the method of the present invention has many features such as being able to effectively perform highly accurate or complex processing with extremely simple equipment, and having an extremely wide range of applications. It is clear that this is an excellent product with the following characteristics.

These features are obtained by bringing the raised fluff raised by centrifugal force into contact with the processing liquid traveling in space.

For example, the present invention can be applied by bringing the raised hair into contact with a stationary (forming a horizontal surface) processing solution, or by contacting it with a processing solution forming a thin layer on a roller (cylindrical). High precision or complex processing cannot be performed.

Similarly, even if a running treatment liquid is brought into contact with the raised fluff that is not erected by centrifugal force, it is not possible to carry out highly accurate or complicated treatment as in the present invention.

The present invention will be specifically explained below using Examples.

Example 1 Acrylic composite filament with self-curling property (12
A cut pile fabric CP was obtained using 6 nylon filament (140d/36f)F2 as the ground yarn.

The pile length of CPl is 18mm and the pile yarn density is approximately 10
000 pieces/crtt.

Next, for polyethylene terephthalate, the molecular weight is 600.
Polyester obtained by copolymerizing 5% (by weight) of polyethylene glycol is designated as polymer P1.

This polymer P1 was melt-spun, stretched 3.5 times at 85°C, then heat-treated at 145°C, and wound into a 150 d
/3f (single yarn 50 denier) polyester fiber is used as filament F3.

Filament F is applied to pile fabric CP1 by tufting method.
Cut pile fabric C with a pile length of 50Tnrll, which was tufted at a density of about 400 single yarns per 1crA using
Obtained P2.

The acrylic filament F1 corresponds to fluff, the polyester filament F3 corresponds to bristle, and the nylon filament F2 corresponds to base fabric, but the bristle of C20 is rough and hard and inferior in feel and appearance. It is.

A pile fabric CP2 was attached around the cylinder 2 using a device as shown in FIG. 1 having a cylinder with a diameter of 1 m, and the thickness of the pricked hair was changed.

The cylinder 2 is rotated at a speed of 10 revolutions per second (centrifugal acceleration is about 200 G, peripheral speed is 31.4 m/sec).

On the other hand, an aqueous solution of 10% caustic soda and 1.0% alkaline hydrolysis accelerator (Ipposha Yushi Kogyo DYK-1125) (
The processing liquid 6) is placed in a tank 7 and heated to 85°C, and then supplied to the discharge part 5 by the pump 8, at a rate of 32 m/s from the discharge part.
Discharge at a speed of

The nozzle of the discharge part 5 uses a slit shape in which the longitudinal section in the direction of the arrow on the XX2 plane shown in FIG. 1 is parallel to the base fabric 2 as shown in FIG. Set the discharge part 5 so that the distance from the liquid 6 is 50 mm, and then gradually move the discharge part 5 with force 4 for 90 minutes until the distance between the base fabric 2 and the processing liquid 6 is 30 mm. It was then returned to its original position (50 mm from the base fabric) for 90 minutes.

As a result of this treatment, the polyester filament F3 corresponding to the stinging bristles gradually became thinner in a 20 mm portion from the center to the tip, and the tip was sharpened.

The texture of the resulting pile fabric was similar to that of natural fur.

This pile fabric is designated as CF2.

Pile fabric CP4 that has been processed to change the thickness of the bristles
were dyed using the same equipment (Figure 1) at the same rotation speed.

That is, the dyeing solution containing the basic dye (in this case, the processing solution is the dyeing solution) is put into the tank 7 until the base fabric 2 is immersed, that is, the position where the distance between the base fabric 2 and the dyeing solution 6 is 10 mm. The discharging unit 5 was set at
After a few minutes it became very pale gray (dye OWO, 02%).

Next, discharge this dyeing solution, put the dyeing solution containing the disperse dye into the tank 7, heat it to 90°C, and set the discharge part 5 at a position where the distance between the dyeing solution 6 and the base fabric 2 is 20 urns. death,
Next, the dyeing was carried out by gradually moving the dyed paper so that the distance was 50 mm over 100 minutes, and then washing.

The stinging hair made of polyester filament F3 is white with almost no dyeing at the root, the center is colored light gray, and the tip is colored slightly darker gray, and the average dye adsorption rate is 0. It was .1%owf.

A polyurethane elastic material is applied to the back side of this dyed pile fabric to fix the pile, the pile is impregnated with a silicone emulsion, and then carried and treated.
It is written as F2.

The pile fabric CP5 has a very high quality appearance and feel similar to mink fur, and is completely different from raw C20 or simply dyed gray C20.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention, and FIGS. 2 to 8 are cross-sectional views showing specific examples of the contact state between the processing liquid and the raised fluff during running or the arrangement of the processing liquid. It is. FIG. 9 is a partial schematic cross-sectional view showing another embodiment of the present invention. FIGS. 10 to 14 are schematic cross-sectional views showing examples of napped products obtained by the present invention.

Claims (1)

[Claims] 1. Processing of a napped product characterized by attaching a fiber structure having napped to a rotating body and rotating it, and bringing the napped raised by centrifugal force into contact with a fiber treatment liquid running in a space. Method. 2. The method according to claim 1, wherein the centrifugal acceleration is IOG to 10,000G. 3. The method according to claim 1, wherein the fiber treatment liquid is a dyeing liquid or a decolorizing liquid. 4. The method according to claim 1, wherein the fiber treatment liquid is a napping solvent or decomposition agent. 5. The method according to claim 1, wherein the fiber treatment liquid traveling in the space flows down by gravity. 6. The method according to claim 1, wherein the fiber treatment liquid traveling in the space is injected from a plurality of nozzles.